1. A bearing positioning disc with a gap adjusting function is characterized in that the positioning disc is in a ring shape and is divided into a front part (19) and a rear part (20) which are integrally connected along the thickness direction of the positioning disc; the outer side wall of the front portion (19) is provided with external threads (12), the outer side wall of the rear portion (20) is formed by connecting a plurality of arc-shaped limiting clamping grooves (13) with the same curvature radius end to end, the front end face of the front portion (19) is an outer ring positioning face (15), and the outer ring positioning face (15) is the same as the end face of the positioned bearing outer ring in shape and size.

2. The bearing positioning plate with the gap adjusting function is characterized in that the arc-shaped limiting clamping groove (13) is positioned on the transmission shell (7) through the limiting conical ring (4) or the limiting locking plate (5).

3. The bearing positioning disk with the clearance adjusting function is characterized in that the limiting conical ring (4) or the limiting locking piece (5) is fixed on the transmission housing (7) through a fastening piece.

4. The bearing positioning plate with the clearance adjusting function according to claim 1, wherein the number of turns of the inner ring of the transmission housing (7) is 1-2 more than that of the outer thread (12).

5. The bearing positioning disk with the gap adjusting function is characterized in that the arc center of the arc-shaped limiting clamping groove (13) is located on the radial central line of the positioning disk.

6. The positioning disc with the clearance adjusting function according to any one of claims 1 to 5, wherein the inner part of the outer ring positioning surface (15) is provided with a coaxial inner ring positioning surface (16), and the shape and the size of the inner ring positioning surface (16) are the same as those of the end surface of the inner ring of the positioned bearing; an annular groove (17) is arranged between the outer ring positioning surface (15) and the inner ring positioning surface (16), and the outer ring positioning surface (15) and the inner ring positioning surface (16) are separated by the annular groove (17).

7. The bearing positioning disc with the gap adjusting function is characterized in that the edge part of the inner hole of the positioning disc is provided with a gripping surface (18).

8. The bearing positioning disc with the clearance adjusting function is characterized in that the gripping surface (18) is composed of a plurality of arc surfaces with equal curvature radius, or the gripping surface (18) is a regular polygon.

Background

The main box intermediate shaft and the secondary shaft rear end bearing of the main box and the secondary box combined transmission need to be axially positioned on a transmission shell rear partition wall to prevent the secondary shaft and the intermediate shaft from moving backwards. The bearing limiting method needs to finely process the plane of the transmission shell at the rear end of the bearing hole, the partition wall at the bearing hole of the transmission shell cannot be designed to be thick so as to provide an axial installation space for the bearing positioning disc and the connecting bolt, the thickness of the partition wall is thin, and certain influence can be generated on the supporting rigidity of the bearing and the vibration resistance of the transmission shell. Meanwhile, if a conical bearing support is adopted, a bearing adjusting gasket with proper thickness is required to be installed between the bearing and the bearing cover so as to ensure that the bearing obtains proper axial installation clearance. In the installation process, the adjusting shim with proper thickness needs to be replaced repeatedly to obtain the set axial clearance, and the assembly is very inconvenient.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a bearing positioning disc with a gap adjusting function, so as to solve the problems that the bearing positioning disc in the prior art has higher processing requirement on the installation and matching part of a transmission shell, occupies large axial space, influences the thickness and rigidity of a partition wall of the transmission shell and is inconvenient to assemble.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:

a bearing positioning disk with a gap adjusting function is in a ring shape, and is divided into a front part and a rear part which are integrally connected along the thickness direction of the positioning disk; the outer side wall of the front part is provided with external threads, the outer side wall of the rear part is formed by connecting a plurality of arc-shaped limiting clamping grooves with the same curvature radius end to end, the front end face of the front part is an outer ring positioning face, and the shape and the size of the outer ring positioning face are the same as those of the end face of an outer ring of a positioned bearing.

The invention is further improved in that:

preferably, the arc-shaped limiting clamping groove is positioned on the transmission shell through a limiting conical ring or a limiting locking plate.

Preferably, the limiting cone ring or the limiting lock sheet is fixed on the transmission housing through a fastener.

Preferably, the number of turns of the thread of the inner ring of the transmission shell is 1-2 more than that of the outer thread.

Preferably, the arc center of the arc-shaped limiting clamping groove is positioned on the radial central line of the positioning disc.

Preferably, a coaxial inner ring positioning surface is arranged inside the outer ring positioning surface, and the shape and the size of the inner ring positioning surface are the same as those of the end surface of the inner ring of the positioned bearing; an annular groove is arranged between the outer ring positioning surface and the inner ring positioning surface, and the outer ring positioning surface and the inner ring positioning surface are separated by the annular groove.

Preferably, the edge part of the inner hole of the positioning plate is provided with a gripping surface.

Preferably, the gripping surface is composed of a plurality of arc surfaces with equal curvature radius, or the gripping surface is a regular polygon.

Compared with the prior art, the invention has the following beneficial effects:

the invention discloses a bearing positioning disk with a gap adjusting function, wherein external threads are arranged on the outer wall of the bearing positioning disk and can be connected with a transmission shell through bolts, and the screwing depth of threads in a shell hole is adjusted in the assembling process to easily realize the adjustment of an assembling gap. The positioning disc can be fixed on the transmission shell through the arc-shaped limiting clamping grooves formed in the positioning disc, the connection mode of the bearing positioning disc and the transmission shell is simple, the shell plane at the rear end of the bearing hole does not need to be subjected to finish machining through the bearing limiting method, and the bearing positioning disc and the connecting bolt occupy a small axial installation space. The wall thickness of the bearing support hole of the transmission shell can be larger than that of a shell adopting a common bearing positioning disc, and the rigidity and the vibration resistance of the shell are better. For a conical bearing, it is no longer necessary to design a shim. Meanwhile, the bearing positioning disc and the limiting lock plate connecting screw of the structure are connected with the transmission shell in a threaded mode, and the connection and the positioning of the bearing positioning disc are more reliable due to the double-threaded connection mode. The shape of the inner hole of the bearing positioning disc can be designed in a diversified mode, so that the bearing positioning disc can be held by hands conveniently and is convenient to disassemble and assemble. Meanwhile, the limit of the inner ring and the outer ring of the bearing can be flexibly designed according to the assembly requirement.

Drawings

FIG. 1 is an example of a bearing puck with axial adjustment for limiting the outer race of a bearing;

wherein, the figure (a) is a front view; (b) FIG. is a side view;

FIG. 2 is an example of a functional bearing puck for axial adjustment that simultaneously limits the inner and outer races of a bearing;

wherein, the figure (a) is a front view; (b) FIG. is a side view;

FIG. 3 is a schematic view of the bearing puck assembled with the transmission housing bearing bore;

FIG. 4 is an assembled cross-sectional view of a bearing puck and a transmission housing bearing bore;

FIG. 5 is a three-dimensional front view of a bearing positioning plate with an axial adjustment function for limiting the outer ring of a bearing;

FIG. 6 is a three-dimensional illustration of the back of a bearing puck with axial adjustment for bearing outer race spacing;

FIG. 7 is a front three-dimensional view of a bearing positioning plate with an axial adjustment function for simultaneously limiting the inner ring and the outer ring of a bearing;

FIG. 8 is a three-dimensional view of the back of a bearing positioning plate with an axial adjustment function for simultaneously limiting the inner and outer rings of a bearing;

in the figure: 1-a first positioning disk; 2-a second positioning plate; 3-locking the screw; 4-limiting conical rings; 5-limiting locking plate; 6-locking the bolt; 7-a transmission housing; 8-two-axis conical bearing; 9-intermediate shaft conical bearing; 10-two axis; 11-the middle shaft; 12-external threads; 13-arc limiting clamping groove; 14-a groove; 15-outer ring positioning surface; 16-inner ring positioning surface; 17-an annular groove; 18-an internal bore gripping surface; 19-anterior section; 20-the posterior part; 21-limiting bottom surface of the clamping groove.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

the invention discloses a bearing positioning disc with a gap adjusting function, and referring to fig. 3 and fig. 4, the positioning disc comprises two types of positioning discs, namely a first positioning disc 1 and a second positioning disc 2, wherein the first positioning disc 1 is used for limiting the outer ring of a bearing, and the second positioning disc 2 is used for simultaneously limiting the inner ring and the outer ring of the bearing. Two positioning disks are installed at the rear end of a bearing hole of a partition wall of the transmission shell, and the positioning disks can quickly adjust and position the axial installation clearance of the transmission secondary shaft and the intermediate shaft supported by the conical bearing. The two bearing positioning disks are both designed in a circular ring shape. Fig. 1 is a schematic structural view of a first positioning plate 1, and fig. 2 is a schematic structural view of a second positioning plate 2.

Example 1 first positioning disk 1

The outer side wall of the circular ring corresponds to the outer diameter, and the inner side wall of the circular ring corresponds to the inner diameter. The external diameter of positioning disk slightly is greater than the dead eye diameter, the face of setting for positioning disk and bearing contact is preceding terminal surface, the another side that corresponds is the rear end face, it is corresponding, for making things convenient for the structure description, each positioning disk divide into preceding part 19 and rear portion 20, be provided with 3 to 4 external screw threads 12 on the lateral wall of preceding part 19, set up the internal thread that more than bearing positioning disk thread number of turns 1 to 2 rings at the rear end of derailleur casing dead eye, external screw thread 12 is installed with the interior screw-in cooperation of dead eye, screw in the derailleur casing through the adjustment positioning disk depth adjustment bearing axial installation clearance, no longer need design the adjustment shim.

Furthermore, a plurality of uniformly distributed arc-shaped limiting clamping grooves 13 with the same curvature radius are formed in the outer side wall of the rear portion 20, each arc-shaped limiting clamping groove 13 protrudes towards the central portion of the positioning disc, the arc center of each arc-shaped limiting clamping groove 13 is located on a radial central line, and the radial central line is a straight line passing through the circle center of the positioning disc. Adjusting the screw-in depth of the positioning disc in a hole of the transmission shell, adjusting the installation clearance of the bearing to a set value, at the moment, the arc center of one of the arc limiting clamping grooves 13 is positioned on the connecting line of the screw hole and the center of the bearing hole on the transmission shell, putting the limiting conical ring 4 or the limiting locking plate 5 which is equal to the curvature radius of the arc limiting clamping groove 13 into the arc limiting clamping groove 13 of the positioning disc, and fastening the limiting conical ring 4 or the limiting locking plate 5 with a threaded hole on the transmission shell by using a fastener, so as to realize the anti-rotation positioning of the bearing positioning disc, wherein the fastener is a locking screw 3 or a locking bolt 6.

Furthermore, the plane of the transmission shell for positioning the limiting conical ring 4 or the limiting locking plate 5 is higher than the bottom surface of a limiting clamping groove at the rear end of a positioning disc arranged on the transmission shell. The limiting conical ring 4 or the limiting locking plate 5 only conducts rotation-preventing positioning on the positioning disc, and after the limiting conical ring 4 or the limiting locking plate 5 is installed, the limiting conical ring or the limiting locking plate only contacts with the cambered surface of the limiting clamping groove 13 on the positioning disc, and does not tightly contact with the bottom surface 21 of the limiting clamping groove.

Furthermore, according to the plane shape and the size of the outer ring at the rear end of the bearing hole of the transmission shell, the limiting conical ring 4 or the limiting locking plate 5 can be flexibly selected to prevent the positioning disc from rotating and positioning.

As one preferable scheme, if the support shaft is provided with an extension section for installing other parts at the rear end of the bearing, that is, the support shaft needs to extend out of the bearing positioning disc, as shown in fig. 4, the secondary shaft 10 passes through the inner hole of the bearing 8 and the inner hole of the bearing positioning disc 1, and the extension section is arranged at the rear end of the secondary conical bearing 8, the inner ring of the conical bearing 8 does not need to be axially limited, and the bearing positioning disc 1 only needs to axially position the outer ring of the secondary conical bearing 8. The bearing puck front end has only one outer race locating surface 15 as shown in figure 6. The outer ring positioning surface 15 is an annular plane with the shape consistent with that of the end surface of the bearing outer ring. The locating surface 15 is abutted against the end face of the bearing outer ring to be installed, and the end face of the bearing outer ring is axially limited.

EXAMPLE 2 second puck 2

The second puck 2 includes all of the structure of the first puck 1.

If the support shaft does not have an extension section at the rear end of the bearing, the support shaft does not extend out of the bearing positioning disc, as shown in the matching condition of the intermediate shaft 11, the conical bearing 9 and the positioning disc 2 shown in fig. 4, and no other part is arranged at the rear end of the bearing, two positioning surfaces, namely an outer ring positioning surface 15 and an inner ring positioning surface 16, can be arranged at the front end of the bearing positioning disc, as shown in fig. 8. The outer ring locating surface 15 and the inner ring locating surface 16 are separated by an annular groove 17. When the bearing positioning disk 2 is arranged at the rear end of the bearing 9, the outer ring positioning surface 15 is abutted against the outer ring end surface of the bearing 9, and the inner ring positioning surface 16 is attached to the inner ring of the bearing 9, so that the axial limiting effect is simultaneously achieved on the inner ring end surface and the outer ring end surface of the bearing.

As one of the preferred schemes, in order to be convenient to hold and rotate during disassembly and assembly, the inner hole of the positioning disc can be provided with the gripping surfaces 18 with different shapes according to the use condition and the specific size of the positioning disc, so that the positioning disc can be conveniently held by hands during disassembly and assembly. In this embodiment, the gripping end surface 18 of the inner hole of the positioning plate 1 is in the shape of an equilateral interlinked arc, as shown in fig. 5. The gripping end face 16 of the inner bore of the puck 2 is a regular polygon, as shown in fig. 6.

As one of the preferable schemes, if the area of the rear end ring surface of the positioning disc is large enough in the practical design, the rear end surface of the positioning disc can be provided with grooves 14 which are uniformly distributed in the circumferential direction, the width of the grooves 14 is set to be equivalent to the width of a finger of a human, about 15mm, as shown in figure 7, so that the bearing positioning disc can be screwed in or out by poking the groove part through the finger when in assembly and disassembly.

The use method of the positioning disk comprises the following steps:

fig. 3 and 4 show an application example of the bearing positioning disk, and the rear ends of a transmission main box secondary shaft 10 and an intermediate shaft 11 are supported in a rear partition wall bearing hole of a transmission housing 7 through a secondary cone bearing 8 and an intermediate cone bearing 9 respectively. The bearing positioning disk 1 and the bearing positioning disk 2 are connected at the rear end of the bearing hole through threads. The bearing positioning disk 1 is positioned and prevented from rotating on the transmission shell through a limiting conical ring 4 and a locking screw 3. The bearing positioning disk 2 is positioned and prevented from rotating on the transmission shell through a limiting locking plate 5 and a locking bolt 6. An outer ring positioning surface 15 on the bearing positioning disc 1 is abutted against the outer ring of the two-shaft conical bearing 8, and axial limiting is provided for the outer ring of the two-shaft conical bearing 8. Outer lane locating surface 15 on the bearing positioning dish 2 supports with jackshaft conical bearing 9's outer lane and leans on, and inner circle locating surface 16 supports with jackshaft conical bearing 9's inner circle and leans on, and the locating dish 2 can provide supplementary spacing to the inner circle when providing axial spacing to jackshaft conical bearing 9's outer lane. During assembly, the bearing positioning disk 1 and the bearing positioning disk 2 are rotated to enable the corresponding shaft and the bearing to obtain a proper axial clearance, the limiting conical ring 4 or the limiting locking plate 5 is arranged in the arc-shaped positioning clamping groove which is aligned with the threaded hole of the shell of the speed changer on the positioning disk, and the assembly and the adjustment are completed by tightening the screw.

The invention discloses a bearing positioning disc with a gap adjusting function, wherein external threads are arranged on the outer wall of the bearing positioning disc and can be connected with a transmission shell of a gearbox through bolts, and the screwing depth of threads in the shell is adjusted during assembly to easily realize adjustment of an assembly gap. The arc-shaped limiting clamping groove arranged on the positioning disc can fix the positioning disc on the transmission shell, the connection mode of the bearing positioning disc and the transmission shell is simple, and the adjustment of the installation gap can be easily realized in the assembling process. According to the bearing limiting method, the plane of the shell at the rear end of the bearing hole does not need to be subjected to finish machining, and the bearing positioning disc and the connecting bolt occupy small axial installation space. The wall thickness of the bearing support hole of the transmission shell can be larger than that of a shell adopting a common bearing positioning disc, and the support and vibration resistance of the shell are better. For the conical bearing, the adjusting shim is not required to be designed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.