1. A U-shaped bolt anti-deflection device is used for assisting in positioning a U-shaped bolt (e) and bolt cover plates (a), wherein each bolt cover plate (a) is provided with two U-shaped mounting grooves (1 a); two U-shaped bolts (e) are correspondingly arranged in the two U-shaped mounting grooves (1a), and each U-shaped bolt (e) is provided with two clamping feet (1e) and a transition rod (2 e); transition pole (2e) of every U type bolt (e) are located a U type mounting groove (1a) respectively, its characterized in that, prevent crooked device and include:

a support frame (100) having a horizontally disposed chute (101);

the sliding beam (3) is vertically arranged, the top end of the sliding beam can slide along the sliding channel groove (101), and the bottom end of the sliding beam (3) is provided with a rotatable pressing block (5) through a connecting structure; a pair of clamping plates (6) are detachably fixed on two sides of the pressing block (5), the clamping plates (6) are used for clamping pins (1e) of two U-shaped bolts (e), and the bottom surface of the pressing block (5) is used for pressing a bolt cover plate (a); the pressing block (5) rotates, the U-shaped bolt (e) and the bolt cover plate (a) are positioned and adjusted relatively to be qualified, and the U-shaped bolt (e) is fixed.

2. A U-bolt anti-skew apparatus as claimed in claim 1, wherein: a horizontal cake structure (31) is arranged at the bottom of the sliding beam (3), and a circular groove is formed in the cake structure (31) from bottom to top; a rotating disc (4) is arranged between the round cake structure (31) and the pressing block (5); the rotating disc (4) is accommodated in the circular groove, and the rotating disc (4) can rotate relative to the round cake structure (31); the top surface of the pressing block (5) is fixed on the bottom surface of the rotating disc (4).

3. A U-bolt anti-skew apparatus as claimed in claim 1, wherein: square concave mounting grooves (51) are formed in the two sides of the compression block (5), and the tops of the pair of clamping plates (6) are fixed to the concave mounting grooves (51) in the two sides through long bolts (9); a pair of splint (6) are all vertical downwards, and the interval is fixed to be set up for supplementary card foot (1e) of fixed two U type bolt (e).

4. A U-bolt anti-skew apparatus as claimed in claim 1, wherein: the supporting frame (100) comprises a base (1), a vertical rod (102) and a telescopic supporting beam (2), wherein the base (1) is in a flat plate shape and is arranged on the bottom surface; the bottom end of the vertical rod (102) is vertically fixed on the base (1); the telescopic supporting beam (2) is horizontal, and one end of the telescopic supporting beam is fixed at the top end of the vertical rod (102).

5. An anti-skew apparatus for a U-bolt as defined in claim 4, wherein: the vertical rod (102) comprises an inner vertical rod (1021) and an outer vertical rod (1020), the outer vertical rod (1020) is tubular, and the bottom end of the outer vertical rod is vertically fixed on the base (1); the inner vertical rod (1021) is inserted into the outer vertical rod (1020), and the inner vertical rod (1021) can stretch relative to the outer vertical rod (1020).

6. An anti-skew apparatus for a U-bolt as defined in claim 5, wherein: a plurality of reinforcing support plates (103) are fixedly arranged at the connecting part of the outer vertical rod (1020) and the base (1), each reinforcing support plate (103) is in the shape of a right-angled triangle, one right-angled edge of each reinforcing support plate is welded and fixed to the side wall of the outer vertical rod (1020), and the other right-angled edge of each reinforcing support plate is welded to the top surface of the base (1); a plurality of reinforcing support plates (103) are uniformly distributed along the circumferential direction of the outer vertical rod (1020).

7. A method for installing a U-bolt based on the anti-skew apparatus of claim 1, wherein the U-bolt (e) is used for clamping a main leaf spring (d) and a secondary leaf spring (b) of a suspension system, the method comprising the steps of:

s1: respectively placing transition rods (2e) of two U-shaped bolts (e) in two U-shaped mounting grooves (1a) of a bolt cover plate (a); a clamping pin (1e) of the U-shaped bolt (e) is clamped between the main steel plate spring (d) and the auxiliary steel plate spring (b);

s2: the pressing block (5) rotates, the clamping feet (1e) of the two U-shaped bolts (e) are clamped by the pair of clamping plates (6), and the bolt cover plate (a) is pressed by the bottom surface of the pressing block (5);

s3: the U-shaped bolt (e) and the bolt cover plate (a) are positioned and adjusted to be qualified relatively, the bottom end of the U-shaped bolt (e) is fixed by a bottom plate (f) and a foot nut (g), and the bottom plate (f) is fixed on the axle (i).

8. A U-bolt anti-skew apparatus as claimed in claim 7, wherein: a horizontal cake structure (31) is arranged at the bottom of the sliding beam (3), and a circular groove is formed in the cake structure (31) from bottom to top; a rotating disc (4) is arranged between the round cake structure (31) and the pressing block (5); the rotating disc (4) is accommodated in the circular groove, and the rotating disc (4) can rotate relative to the round cake structure (31); the top surface of the compression block (5) is fixed on the bottom surface of the rotating disc (4);

in step S2, the rotating disc (4) is adjusted to drive the clamping plates (6) on both sides of the pressing block (5), so that the clamping legs (1e) of the two U-shaped bolts (e) are clamped to a proper position by the pair of clamping plates (6).

9. A U-bolt anti-skew apparatus as claimed in claim 7, wherein: square concave mounting grooves (51) are formed in the two sides of the compression block (5), and the tops of the pair of clamping plates (6) are fixed to the concave mounting grooves (51) in the two sides through long bolts (9); a pair of splint (6) are all vertical downwards, and the interval is fixed to be set up for supplementary card foot (1e) of fixed two U type bolt (e).

10. A U-bolt anti-skew apparatus as claimed in claim 8, wherein: the supporting frame (100) comprises a base (1), a vertical rod (102) and a telescopic supporting beam (2), wherein the base (1) is in a flat plate shape and is arranged on the bottom surface; the bottom end of the vertical rod (102) is vertically fixed on the base (1); the telescopic supporting beam (2) is horizontal, and one end of the telescopic supporting beam is fixed at the top end of the vertical rod (102);

the vertical rod (102) comprises an inner vertical rod (1021) and an outer vertical rod (1020), the outer vertical rod (1020) is tubular, and the bottom end of the outer vertical rod is vertically fixed on the base (1); the inner vertical rod (1021) is inserted into the outer vertical rod (1020), and the inner vertical rod (1021) can stretch relative to the outer vertical rod (1020);

in step S2, when the clamping legs (1e) of the two U-shaped bolts (e) are clamped to a proper position by the pair of clamping plates (6), the inner vertical rod (1021) is adjusted to extend and retract to a specified height along the outer vertical rod (1020), and the bolt cover plate (a) is pressed by the pressing block (5).

Background

At present, when a suspension system of a commercial vehicle is installed, a frame is overturned and inverted on a production line. Specifically, a main steel plate spring d, an auxiliary steel plate spring b, a bolt cover plate a and a U-shaped bolt e are firstly assembled into a whole on a production line, and then the whole formed by installation is hoisted by a hoisting device from top to bottom and is installed on a frame which is turned over. Because the frame is large in space after being turned over, the frame can be installed into a whole and then hoisted and installed.

In the process of trial production of the new vehicle type, the new vehicle type cannot turn over the vehicle frame in a trial production workshop, so that the main steel plate spring d, the auxiliary steel plate spring b, the bolt cover plate a, the U-shaped bolt e and other structures cannot be separately assembled in advance, and the new vehicle type can only be gradually installed on the vehicle frame.

However, in the process of gradually installing the main steel plate spring d, the auxiliary steel plate spring b, the bolt cover plate a, the U-shaped bolt e and other structures, the main steel plate spring d and the auxiliary steel plate spring b are clamped and fixed by the U-shaped bolt e, and the U-shaped bolt e often deflects in the final fastening process due to a certain installation gap between the U-shaped bolt e and the bolt cover plate a; the U-shaped bolt e has extremely high requirements for installation accuracy, and once the U-shaped bolt e is deflected, the stress of the main leaf spring d and the auxiliary leaf spring b is concentrated, and the U-shaped bolt e is broken after a long time.

Disclosure of Invention

Aiming at the defects in the prior art, the application aims to provide the anti-deflection device and the installation method of the U-shaped bolt, which can improve the installation precision of the U-shaped bolt, prevent the U-shaped bolt from deflecting and improve the installation quality of a steel plate spring of a suspension system on the premise of not overturning a frame.

In order to achieve the above purposes, the technical scheme is as follows: a U-shaped bolt anti-skew device is used for assisting in positioning a U-shaped bolt and bolt cover plates, and each bolt cover plate is provided with two U-shaped mounting grooves; two U-shaped bolts are correspondingly arranged in the two U-shaped mounting grooves, and each U-shaped bolt is provided with two clamping feet and a transition rod; the transition pole of every U type bolt is located a U type mounting groove respectively, prevent crooked device includes:

a support frame having a horizontally disposed chute; the sliding beam is vertically arranged, the top end of the sliding beam can slide along the sliding channel groove, and the bottom end of the sliding beam is provided with a rotatable pressing block through a connecting structure; a pair of clamping plates are detachably fixed on two sides of the pressing block, the clamping plates are used for clamping pins of the two U-shaped bolts, and the bottom surface of the pressing block is used for pressing a bolt cover plate; the pressing block rotates, the U-shaped bolt and the bolt cover plate are correspondingly positioned and adjusted to be qualified, and the U-shaped bolt is fixed.

On the basis of the technical scheme, a horizontal cake structure is arranged at the bottom of the sliding beam, and a circular groove is formed in the cake structure from bottom to top; a rotating disc is arranged between the round cake structure and the pressing block; the rotating disc is accommodated in the circular groove and can rotate relative to the round cake structure; the top surface of the pressing block is fixed on the bottom surface of the rotating disc.

On the basis of the technical scheme, square concave mounting grooves are formed in two sides of the compression block, and the tops of the pair of clamping plates are fixed in the concave mounting grooves in the two sides through long bolts; a pair of splint are all vertical downwards, and the interval is fixed to be set up for the supplementary card foot of fixing two U type bolts.

On the basis of the technical scheme, the support frame comprises a base, a vertical rod and a telescopic supporting beam, wherein the base is in a flat plate shape and is arranged on the bottom surface; the bottom end of the vertical rod is vertically fixed on the base; the telescopic supporting beam is horizontal, and one end of the telescopic supporting beam is fixed at the top end of the vertical rod.

On the basis of the technical scheme, the vertical rod comprises an inner vertical rod and an outer vertical rod, the outer vertical rod is tubular, and the bottom end of the outer vertical rod is vertically fixed on the base; the inner vertical rod is inserted into the outer vertical rod and can stretch relative to the outer vertical rod.

On the basis of the technical scheme, a plurality of reinforcing support plates are fixedly arranged at the connecting part of the outer vertical rod and the base, each reinforcing support plate is in the shape of a right-angled triangle, one right-angled edge of each reinforcing support plate is welded and fixed on the side wall of the outer vertical rod, and the other right-angled edge of each reinforcing support plate is welded on the top surface of the base; a plurality of reinforcing support plates are uniformly distributed along the circumferential direction of the outer vertical rod.

The application also discloses an installation method of the U-shaped bolt based on the anti-skew device, the U-shaped bolt is used for clamping a main leaf spring and an auxiliary leaf spring of a suspension system, and the installation method comprises the following steps:

s1: respectively placing the transition rods of the two U-shaped bolts in the two U-shaped mounting grooves of the bolt cover plate; the clamping feet of the U-shaped bolt are clamped between the main steel plate spring and the auxiliary steel plate spring;

s2: the pressing block rotates, the clamping feet of the two U-shaped bolts are clamped by the pair of clamping plates, and the bolt cover plate is pressed by the bottom surface of the pressing block;

s3: the U-shaped bolt and the bolt cover plate are qualified in relative positioning adjustment, and are fixed at the bottom end of the U-shaped bolt by the bottom plate and the foot nut, and the bottom plate is fixed on the axle.

On the basis of the technical scheme, a horizontal cake structure is arranged at the bottom of the sliding beam, and a circular groove is formed in the cake structure from bottom to top; a rotating disc is arranged between the round cake structure and the pressing block; the rotating disc is accommodated in the circular groove and can rotate relative to the round cake structure; the top surface of the pressing block is fixed on the bottom surface of the rotating disc;

in step S2, the rotating disc is adjusted to drive the clamping plates on both sides of the pressing block, so that the clamping pins of the two U-shaped bolts are clamped by the pair of clamping plates to proper positions.

On the basis of the technical scheme, square concave mounting grooves are formed in two sides of the compression block, and the tops of the pair of clamping plates are fixed in the concave mounting grooves in the two sides through long bolts; a pair of splint are all vertical downwards, and the interval is fixed to be set up for the supplementary card foot of fixing two U type bolts.

On the basis of the technical scheme, the support frame comprises a base, a vertical rod and a telescopic supporting beam, wherein the base is in a flat plate shape and is arranged on the bottom surface; the bottom end of the vertical rod is vertically fixed on the base; the telescopic supporting beam is horizontal, and one end of the telescopic supporting beam is fixed at the top end of the vertical rod; the vertical rod comprises an inner vertical rod and an outer vertical rod, the outer vertical rod is tubular, and the bottom end of the outer vertical rod is vertically fixed on the base; the inner vertical rod is inserted into the outer vertical rod and can stretch relative to the outer vertical rod; in step S2, when the clamping legs of the two U-shaped bolts are clamped to the proper positions by the pair of clamping plates, the inner vertical rod is adjusted to extend and retract to a predetermined height along the outer vertical rod, and the bolt cover plate is compressed by the compression block.

The beneficial effect that technical scheme that this application provided brought includes:

the utility model provides a U type bolt prevent device and installation method that warp, have following beneficial effect:

1. the anti-skew device comprises a support frame and a sliding beam, wherein the support frame is provided with a horizontally arranged sliding channel groove, the top end of the sliding beam can slide along the sliding channel groove, and a pressing block can rotate relative to the sliding beam; a pair of clamping plates are detachably fixed on two sides of the pressing block and used for clamping feet of the two U-shaped bolts, and the four clamping feet are tightly pressed on the side surfaces of the main steel plate spring and the auxiliary steel plate spring by the pair of clamping plates, so that the effects of fixing the U-shaped bolts and improving the installation precision are achieved; the bottom surface of the pressing block is used for pressing a bolt cover plate, and the transition rod of the U-shaped bolt is tightly pressed in the U-shaped mounting groove. The compact heap rotates, drives splint and rotates, can finely tune the relative position of U type bolt and bolt cover plate. When the relative positioning adjustment of the U-shaped bolt and the bolt cover plate is qualified, the U-shaped bolt is fixed, the mounting precision of the U-shaped bolt can be greatly improved, the mounting quality of a leaf spring of a suspension system is further improved, and the problem of stress concentration caused by the fact that the U-shaped bolt is mounted obliquely is effectively solved.

2. According to the anti-deflection device, the vertical rod comprises an inner vertical rod and an outer vertical rod, the outer vertical rod is tubular, and the bottom end of the outer vertical rod is vertically fixed on the base; the inner vertical rod is inserted into the outer vertical rod and can stretch relative to the outer vertical rod. The inner vertical rod can stretch relative to the outer vertical rod, so that the anti-deflection device can adjust the pair of clamping plates to be right above the U-shaped bolt firstly, and then slowly shrink downwards until the pair of clamping plates clamp and fix the U-shaped bolt; the setting of interior montant and outer montant makes the device that prevents skewing of this application adjust in a flexible way, has further promoted the installation accuracy of U type bolt.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is an exploded view of an anti-skew apparatus according to an embodiment of the present disclosure;

fig. 2 is an assembly schematic view of an anti-skew device provided in an embodiment of the present application;

fig. 3 is a schematic view of an application scenario of an anti-skew apparatus according to an embodiment of the present disclosure;

FIG. 4 is an enlarged view of the bolt cover plate and U-bolt of FIG. 3;

fig. 5 is a cross-sectional view of an application scenario of an anti-skew apparatus according to an embodiment of the present application;

reference numerals: a. a bolt cover plate; b. a secondary leaf spring; d. a main leaf spring; e. a U-shaped bolt; f. a base plate; g. a foot nut; 1a, a U-shaped mounting groove; 1e, a clamping pin; 2e, a transition rod; 1. a base; 2. a telescopic support beam; 3. a sliding beam; 4. rotating the disc; 5. a compression block; 6. a splint; 9. a long bolt; 100. a support frame; 101. a chute; 102. a vertical rod; 103. reinforcing the support plate; 1021. an inner vertical rod; 1020. an outer vertical rod; 31. a cake structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 3, 4 and 5, the anti-skew device of the present application is used to improve the installation accuracy of the U-bolt e without turning over the vehicle frame. The U-shaped bolt e is used for fixing the main leaf spring d and the auxiliary leaf spring b of the suspension system. In the suspension system, the auxiliary leaf spring b is arranged above the main leaf spring d in an overlapping mode, the top face of the auxiliary leaf spring b is provided with a bolt cover plate a, the width of the bolt cover plate a is the same as that of the main leaf spring d and the auxiliary leaf spring b, and the length of the bolt cover plate a is equal to the length of the minimum-stage leaf plate of the auxiliary leaf spring b. Specifically, the secondary leaf spring b comprises a plurality of secondary leaf springs, and the length of the bolt cover plate a is equal to that of the smallest leaf spring.

In the suspension system, each bolt cover plate a is provided with two U-shaped mounting grooves 1a, and each U-shaped bolt e is provided with two clamping feet 1e and a transition rod 2 e. The two U-shaped bolts e are inverted to clamp and fix the main steel plate spring d and the auxiliary steel plate spring b, and the transition rod 2e of each U-shaped bolt e is positioned in one U-shaped mounting groove 1a respectively. Two U-shaped bolts e are arranged in parallel at intervals.

In the actual process of manufacturing, in order to facilitate installation, the width of the U-shaped installation groove 1a is larger than that of the transition rod 2e, and a certain installation gap is formed between each U-shaped installation groove 1a and the transition rod 2 e. The installation gap has the significance that the installation gap can be better assembled, but the installation accuracy requirement of the U-shaped bolt e is extremely high, and the installation risk of the U-shaped bolt e is also increased by the installation gap. Therefore, the main purpose of the anti-skew device of this application is to promote the installation accuracy of U type bolt, prevents that U type bolt e is crooked.

Specifically, as shown in fig. 1, 2 and 3, the anti-skew device includes a support bracket 100 and a sliding beam 3. The support frame 100 has a horizontally disposed chute 101, the sliding beam 3 is vertically disposed, and the top end of the sliding beam can slide along the chute 101. The bottom of sliding beam 3 sets up rotatable compact heap 5 through connection structure, and compact heap 5 can rotate for sliding beam 3. A pair of splint 6 of fixed can be dismantled to compact heap 5's both sides, and a pair of splint 6 is used for pressing from both sides the card foot 1e of two U type bolt e, and a pair of splint 6 closely pressfitting main leaf spring d and vice leaf spring b side with four card feet 1e, reaches the effect of fixed U type bolt e. Meanwhile, the bottom surface of the pressing block 5 is used for pressing a bolt cover plate a, and a transition rod 2e of a U-shaped bolt e is tightly pressed in the U-shaped mounting groove 1 a. The pressing block 5 rotates to drive the clamping plate 6 to rotate, and the relative position of the U-shaped bolt e and the bolt cover plate a can be finely adjusted. When the relative positioning adjustment of the U-shaped bolt e and the bolt cover plate a is qualified, the U-shaped bolt e is fixed, the installation precision of the U-shaped bolt e can be greatly improved, the installation quality of a steel plate spring of a suspension system is further improved, and the problem of stress concentration caused by the fact that the U-shaped bolt e is installed obliquely is effectively solved.

As shown in fig. 5, in one embodiment, the bottom of the sliding beam 3 is provided with a horizontal disc structure 31, and the disc structure 31 is provided with a circular groove from bottom to top. A rotating disc 4 is arranged between the cake structure 31 and the pressing block 5, the rotating disc 4 is used for rotating relative to the cake structure 31, and the relative positions of the U-shaped bolts e and the bolt cover plates a are finely adjusted. The rotating disc 4 is accommodated in the circular groove, and the rotating disc 4 can rotate relative to the cake structure 31; the top surface of the pressing block 5 is fixed to the bottom surface of the rotating disk 4.

Preferably, the lower surface of the rotating disc 4 is provided with a groove, the upper surface of the pressing block 5 is provided with a protrusion, and the protrusion of the pressing block 5 is connected in the groove of the rotating disc 4 in an interference manner.

In one embodiment, the compression block 5 is provided with square concave mounting grooves 51 at both sides, and the tops of the pair of clamping plates 6 are fixed to the concave mounting grooves 51 at both sides by long bolts 9, respectively. A pair of splint 6 is all vertical downwards, and the interval is fixed to be set up for the supplementary card foot 1e of two U type bolt e of fixed. The concave mounting groove 51 of the pressing block 5 can enable the clamping plate 6 to be fixed more stably and reliably.

In one embodiment, the supporting frame 100 comprises a base 1, a vertical rod 102 and a telescopic supporting beam 2, wherein the base 1 is in a flat plate shape and is arranged on the bottom surface; the bottom end of the vertical rod 102 is vertically fixed on the base 1; the telescopic support beam 2 is horizontal and has one end fixed to the top end of the vertical rod 102.

Further, the vertical rod 102 comprises an inner vertical rod 1021 and an outer vertical rod 1020, the outer vertical rod 1020 is tubular, and the bottom end of the outer vertical rod is vertically fixed on the base 1; the inner vertical rod 1021 is inserted into the outer vertical rod 1020, and the inner vertical rod 1021 can stretch relative to the outer vertical rod 1020. The inner vertical rod 1021 can stretch relative to the outer vertical rod 1020, so that the anti-skew device can firstly adjust the pair of clamping plates 6 to be right above the U-shaped bolt e, and then slowly shrink downwards until the pair of clamping plates 6 clamp and fix the U-shaped bolt e; the arrangement of the inner vertical rod 1021 and the outer vertical rod 1020 enables the anti-deflection device to be flexibly adjusted, and the installation accuracy of the U-shaped bolt is further improved.

In one embodiment, a plurality of reinforcing support plates 103 are fixedly arranged at the connecting part of the outer vertical rod 1020 and the base 1, each reinforcing support plate 103 is in the shape of a right triangle, one right-angled edge of each reinforcing support plate is welded and fixed to the side wall of the outer vertical rod 1020, and the other right-angled edge of each reinforcing support plate is welded to the top surface of the base 1; a plurality of reinforcing support plates 103 are uniformly distributed along the circumference of the outer vertical rod 1020. The arrangement of a plurality of reinforcing support plates 103 ensures that the structure of the anti-deflection device is stable.

The application discloses installation method's of U type bolt embodiment based on above-mentioned anti skew device, U type bolt e is used for centre gripping suspension system's main leaf spring d and vice leaf spring b, contains the step:

s1: respectively placing transition rods 2e of two U-shaped bolts e in two U-shaped mounting grooves 1a of a bolt cover plate a; a clamping pin 1e of the U-shaped bolt e is clamped between the main steel plate spring d and the auxiliary steel plate spring b;

s2: the pressing block 5 rotates, the clamping feet 1e of the two U-shaped bolts e are clamped by the pair of clamping plates 6, the bolt cover plate a is pressed by the bottom surface of the pressing block 5, and the relative positions of the U-shaped bolts e and the bolt cover plate a are finely adjusted;

s3: the U-shaped bolt e and the bolt cover plate a are positioned and adjusted to be qualified relatively, the bottom plate f and the foot nut g are fixed at the bottom end of the U-shaped bolt e (see figure 3), and the bottom plate f is fixed on the axle i.

Specifically, the bottom plate f has four positioning holes, and each positioning hole is used for penetrating one clamping pin 1 e. In step S3, the bottom plate f and the leg nut g are first mounted to the bottom end of the U-bolt e (see fig. 3), but the leg nut g is not tightened. And screwing the foot nut g until the U-shaped bolt e and the bolt cover plate a are positioned and adjusted qualified relatively, so that the U-shaped bolt e is fixed.

Specifically, the relative positioning adjustment between the U-shaped bolt e and the bolt cover plate a is qualified, which means that the U-shaped bolt e is vertical, and the transition rod 2e of the U-shaped bolt e is located at the midpoint of the U-shaped mounting groove 1a of the bolt cover plate a.

Further, in an embodiment of the mounting method of the U-shaped bolt, a horizontal cake structure 31 is arranged at the bottom of the sliding beam 3, and the cake structure 31 is provided with a circular groove from bottom to top; a rotating disc 4 is arranged between the round cake structure 31 and the pressing block 5; the rotating disc 4 is accommodated in the circular groove, and the rotating disc 4 can rotate relative to the cake structure 31; the top surface of the pressing block 5 is fixed to the bottom surface of the rotating disk 4.

In step S2, the rotating disc 4 is adjusted to drive the clamping plates 6 on both sides of the pressing block 5, so that the clamping legs 1e of the two U-shaped bolts e are clamped by the pair of clamping plates 6 to a proper position.

Specifically, in one embodiment of the U-bolt installation method, square concave installation grooves 51 are provided on both sides of the compression block 5, and the tops of the pair of clamp plates 6 are fixed to the concave installation grooves 51 on both sides by long bolts 9, respectively; a pair of splint 6 is all vertical downwards, and the interval is fixed to be set up for the supplementary card foot 1e of two U type bolt e of fixed.

The support frame 100 comprises a base 1, a vertical rod 102 and a telescopic support beam 2, wherein the base 1 is in a flat plate shape and is arranged on the bottom surface; the bottom end of the vertical rod 102 is vertically fixed on the base 1; the telescopic supporting beam 2 is horizontal, and one end of the telescopic supporting beam is fixed at the top end of the vertical rod 102; the vertical rod 102 comprises an inner vertical rod 1021 and an outer vertical rod 1020, the outer vertical rod 1020 is tubular, and the bottom end of the outer vertical rod is vertically fixed on the base 1; the inner vertical rod 1021 is inserted into the outer vertical rod 1020, and the inner vertical rod 1021 can stretch relative to the outer vertical rod 1020; in step S2, when the clamping legs 1e of the two U-shaped bolts e are clamped to a proper position by the pair of clamping plates 6, the inner vertical rod 1021 is adjusted to extend and retract to a specified height along the outer vertical rod 1020, and the bolt cover plate a is pressed by the pressing block 5.

According to the installation method of the U-shaped bolt, a pair of clamping plates 6 is used for clamping the clamping feet 1e of two U-shaped bolts e, the bottom surface of a pressing block 5 is used for pressing a bolt cover plate a, and a transition rod 2e of the U-shaped bolt e is tightly pressed in the U-shaped installation groove 1 a; the pressing block 5 rotates to drive the clamping plate 6 to rotate, and the relative position of the U-shaped bolt e and the bolt cover plate a can be finely adjusted. When the relative positioning adjustment of the U-shaped bolt e and the bolt cover plate a is qualified, the U-shaped bolt e is fixed, the mounting precision of the U-shaped bolt e can be greatly improved, the mounting quality of a leaf spring of a suspension system is further improved, and the problem of stress concentration caused by the fact that the U-shaped bolt e is mounted obliquely is effectively solved.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.