1. The utility model provides a cylindrical roller bearing detects auxiliary fixtures which characterized in that: the loading device comprises a loading mechanism, a main frame body, a threaded rod, a connecting rod and a fixing claw, wherein the main frame body is provided with a top rod, a bottom rod and a pair of side rods which are oppositely arranged; the loading end of the loading mechanism is detachably and fixedly connected to the ejector rod; the threaded rod is slidably arranged on the bottom rod in a penetrating manner along the vertical connecting direction between the top rod and the bottom rod, and the distance between the threaded rod and the side rods is equal; a through groove is formed in the side rods along the vertical connecting direction between the top rod and the bottom rod;

the threaded rod is in threaded connection with a threaded sleeve, one end of the connecting rod is hinged with the threaded sleeve, and the other end of the connecting rod is hinged with one end of the fixed claw; the fixing claws are at least two and are respectively arranged in the through grooves in a penetrating mode, each fixing claw comprises a straight rod parallel to the vertical connecting direction between the top rod and the bottom rod, a bent rod for connecting the straight rod and the connecting rod, and a fixing head arranged at the tail end of the straight rod, the straight rod of each fixing claw is arranged downwards, and the bent rod is in sliding fit with the through grooves; the fixing heads are arranged on the opposite side walls of the fixing claws;

the through groove is detachably connected with a limiting component for limiting the bent rod to slide upwards.

2. The cylindrical roller bearing detection auxiliary tool according to claim 1, characterized in that: the bent rod is of an arc-shaped bent structure; or the bent rod comprises at least two short straight rods connected at an obtuse angle.

3. The cylindrical roller bearing detection auxiliary tool according to claim 1 or 2, characterized in that: the fixed claw is integrally formed.

4. The cylindrical roller bearing detection auxiliary tool according to claim 1, characterized in that: the tail end of the straight rod is provided with a groove, a spring is installed in the groove, an anti-falling cover is arranged on the groove, one end of the fixing head is elastically matched with the spring, the other end of the fixing head is pulled out of a hole in the anti-falling cover, and a limiting structure for limiting the length of the hole in the anti-falling cover is arranged on the fixing head.

5. The cylindrical roller bearing detection auxiliary tool according to claim 4, characterized in that: the other end of the fixed head adopts a bullet head.

6. The cylindrical roller bearing detection auxiliary tool according to claim 1, characterized in that: the loading mechanism is an air cylinder, at least two piston rods of the air cylinder are detachably and fixedly connected with the ejector rod of the main frame body through a top plate.

7. The cylindrical roller bearing detection auxiliary tool according to claim 2, characterized in that: the inclination angle between the short straight rod connected with the connecting rod and the straight rod is 100-110 degrees.

8. The cylindrical roller bearing detection auxiliary tool according to claim 2 or 7, characterized in that: the included angle between at least two short straight rods is 130-135 degrees, and the included angle between the short straight rod and the straight rod connected with the short straight rod is 147-152 degrees.

9. The cylindrical roller bearing detection auxiliary tool according to claim 1, characterized in that: the straight rod comprises a first rod and a second rod, and the first rod and the second rod are detachably and fixedly connected.

10. The cylindrical roller bearing detection auxiliary tool according to claim 1, characterized in that: the limiting assembly comprises a screw and a nut which are in threaded connection.

Background

In the prior detection process, the cylindrical roller bearing without the flange of the inner ring cannot bear axial load during vibration noise measurement due to the lack of the flange of the inner ring, so that the phenomenon that the inner ring is separated from a mandrel under the environment of high rotating speed exists in the detection process, and the test is stopped.

In order to avoid the above phenomena, in the prior art, a threaded hole penetrating up and down is usually processed in the center of the mandrel, and then the inner ring is axially locked through a matched tool. The size of the matched tool needs to be matched with that of the bearing, so that the fixing method has the defects of more types and numbers of matched tools and higher processing cost pressure.

Based on this, the present application is proposed.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an auxiliary tool for detecting a cylindrical roller bearing without a flange on an inner ring, which can be adapted to be used in different sizes, keep the inner ring to normally run in a test process and solve the problems of low adaptability and overhigh processing cost of a matched tool in the prior art.

In order to achieve the purpose, the auxiliary tool for detecting the cylindrical roller bearing has the following structure: the loading device comprises a loading mechanism, a main frame body, a threaded rod, a connecting rod and a fixing claw, wherein the main frame body is provided with a top rod, a bottom rod and a pair of side rods which are oppositely arranged; the loading end of the loading mechanism is detachably and fixedly connected to the ejector rod; the threaded rod is slidably arranged on the bottom rod in a penetrating manner along the vertical connecting direction between the top rod and the bottom rod, and the distance between the threaded rod and the side rods is equal; a through groove is formed in the side rods along the vertical connecting direction between the top rod and the bottom rod;

the threaded rod is in threaded connection with a threaded sleeve, one end of the connecting rod is hinged with the threaded sleeve, and the other end of the connecting rod is hinged with one end of the fixed claw; the fixing claws are at least two and are respectively arranged in the through grooves in a penetrating mode, each fixing claw comprises a straight rod parallel to the vertical connecting direction between the top rod and the bottom rod, a bent rod for connecting the straight rod and the connecting rod, and a fixing head arranged at the tail end of the straight rod, the straight rod of each fixing claw is arranged downwards, and the bent rod is in sliding fit with the through grooves; the fixing head is arranged on the side wall opposite to the fixing claw.

The through groove is detachably connected with a limiting component for limiting the bent rod to slide upwards.

The technical scheme is as follows: when the loading mechanism starts to work for radial loading, the whole structure, particularly the main frame body, gradually approaches to the bearing outer ring, and simultaneously the bottom end of the threaded rod is in interference fit with the bearing outer ring. In the continuous loading process, because the bottom protrusion of threaded rod in the bearing inner race, so after its conflict cooperation with the bearing inner race, the threaded rod receives reaction force reverse movement to drive the connecting rod through the thread bush and remove, make the connecting rod drive the stationary dog swing through the pin joint between stationary dog and the connecting rod, the pin joint between connecting rod and the thread bush afterwards (because the limiting displacement of spacing subassembly, the stationary dog can't move up in leading to the groove). In the swing process of the fixed claws, the fixed heads move towards the end faces of the bearing inner rings and contact with the end faces to form axial limiting, so that the bearing inner rings are limited in the two fixed claws, and the purpose of preventing the bearing inner rings from being separated from the bearing under the influence of a test condition is achieved.

Through the technical scheme, the invention provides the auxiliary tool which is free from clamping, is used in direct contact and is convenient to operate, and the bearing inner ring can be effectively fixed by clamping the bearing inner ring from two sides by using the fixing claws; and the loading condition of the loading mechanism can be controlled, and the working state of the auxiliary tool can be conveniently controlled. And the bottom of the threaded rod can be adjusted to protrude out of the outer ring of the bearing by adjusting the protruding amount of the threaded rod sleeved on the threaded rod, so that the bearing is suitable for bearings with different diameters, and the swing range of the fixed claw can be adjusted by combining the position of the limiting component on the sliding groove, so that the bearing is suitable for bearings with different thicknesses. The type number of auxiliary fixtures can be greatly reduced, and the processing cost is further reduced.

The invention further provides the following: the bent rod is of an arc-shaped bent structure; or the bent rod comprises two short straight rods which are connected with each other at a certain obtuse angle.

In order to facilitate the processing, the invention further comprises the following steps: the fixed claw is integrally formed.

The invention further provides the following: the tail end of the straight rod is provided with a groove, a spring is installed in the groove, an anti-falling cover is arranged on the groove, one end of the fixing head is elastically matched with the spring, the other end of the fixing head is pulled out of a hole in the anti-falling cover, and a limiting structure for limiting the length of the hole in the anti-falling cover is arranged on the fixing head.

The technical scheme provides the telescopic elastic fixing head structure, the telescopic elastic fixing head structure is in interference fit with the bearing inner ring, the axial limiting effect can be achieved, meanwhile, the fixing head is prevented from applying pressure to the end face of the bearing inner ring to influence the normal operation of the bearing inner ring, and the effectiveness of the auxiliary tool is ensured.

The invention further provides the following: the other end of the fixed head adopts a bullet head, so that the fixed head can be prevented from influencing the normal operation of the bearing inner ring, and the accuracy of the detection structure is ensured.

The invention further provides the following: the loading mechanism is an air cylinder, at least two piston rods of the air cylinder are detachably and fixedly connected with the ejector rod of the main frame body through a top plate.

The technical scheme can stably and uniformly transmit the radial force generated by the loading mechanism to the main frame body and push the main frame body to move.

The invention further provides the following: the inclination angle between the short straight rod connected with the connecting rod and the straight rod is 100-110 degrees.

The invention further provides the following: the included angle between at least two short straight rods is 130-135 degrees, and the included angle between the short straight rod and the straight rod connected with the short straight rod is 147-152 degrees.

The invention further provides the following: the straight rod comprises a first rod and a second rod, the first rod and the second rod are detachably and fixedly connected, and when the first rod is connected with the bent rod, the second rod with different sizes and lengths can be replaced to adapt to the bearing with larger size difference.

The invention further provides the following: the limiting assembly comprises a screw and a nut which are connected through threads, and the limiting assembly is simple in structure, wide in source and convenient to use.

The invention has the following beneficial effects: the loading mechanism is used for enabling the fixed head to be always in stable contact with the inner ring and applying a certain pretightening force, so that the phenomenon that the inner ring is separated under a high-speed environment is avoided, and the stability of the detection process is ensured.

Drawings

FIG. 1 is a general schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of a fixing claw according to an embodiment of the present invention.

FIG. 3 is a general view of the usage status of the embodiment of the present invention.

FIG. 4 is a schematic front view of a usage status of the present invention.

Fig. 5 is a schematic sectional view taken along the line a-a in fig. 4.

Fig. 6 is a partially enlarged view of fig. 5.

Reference numerals: 1. a cylinder; 2. a main frame body; 3. a threaded rod; 4. a threaded sleeve; 5. swinging the clamping assembly; 6. a limiting component; 21. a strip-shaped through groove; 22. a bottom bar; 61. a nut; 62. a screw; 11. a piston rod; 12. a top plate; 41. a side wing; 51. a connecting rod; 52. a fixed jaw; 53. a fixing assembly; 521. a first short rod; 522. a short rod II; 100. a bearing to be measured; 101. a bearing inner race; 531. a spring; 532. a fixed head; 533. and (4) an anti-drop cover.

Detailed Description

Embodiment 1 this embodiment provides a cylindrical roller bearing detects auxiliary fixtures, including loading mechanism, the body frame 2, threaded rod 3 and swing centre gripping subassembly 5, wherein, swing centre gripping subassembly 5 includes a pair of symmetrical connection and threaded rod 3 on connecting rod 51 and stationary dog 52. As shown in fig. 1, in this embodiment, the loading mechanism adopts a cylinder 1, an air chamber and a piston which generates displacement along with the volume change of the air chamber are arranged in the cylinder 1, and at least two parallel piston rods 11 are connected to the piston, in this embodiment, two piston rods 11 are provided. One end of the piston rod 11 is fixedly connected with the piston, and the other end of the piston rod 11 is connected with a top plate 12 together, and is detachably and fixedly connected to the top end of the main frame body 2 through the top plate 12. As shown in fig. 5, the main frame 2 has a top bar, a bottom bar 22 and a pair of side bars, wherein the top bar, the bottom bar 22 and the side bars are strip-shaped plates with certain width and thickness, and the top bar, the bottom bar 22 and the pair of side bars are fixedly connected to form a symmetrical rectangular frame structure. The other end of the piston rod 11 is connected to the upper surface of the jack. The bottom rod 22 has an opening at the center, the threaded rod 3 is slidably inserted into the opening of the bottom rod 22 along the vertical connection direction (i.e., the vertical direction in fig. 1) between the top rod and the bottom rod 22, and the bottom of the bottom rod 22 partially protrudes from the bottom surface of the bottom rod 22.

Set up the bar of vertical direction on the lateral wall of two side levers and lead to groove 21, aforementioned swing centre gripping subassembly 5 is installed promptly among threaded rod 3 and this bar lead to groove 21: specifically, first, a threaded sleeve 4 is connected to the threaded rod 3 in a threaded manner, the number of the connecting rods 51 and the number of the fixing claws 52 are two, wherein one end of each connecting rod 51 is hinged to the corresponding side wing 41 protruding from the lower portion of each of the two sides of the threaded sleeve 4, and the other end of each connecting rod 51 is hinged to one end of one fixing claw 52. The fixed claw 52 is eliminated by integral forming and comprises a straight rod, a bent rod and a fixed head 532, wherein the straight rod, the bent rod and the fixed head 532 are vertically arranged, and the bent rod is formed by connecting two short straight rods at a certain obtuse angle. The straight rod has a certain length, and is respectively arranged on two sides of the side rod of the main frame body 2, and the length of the straight rod needs to meet the requirement that the straight rod can extend from a certain point outside the range of the bearing outer ring of the bearing 100 to be measured to the inner ring of the bearing 100 to be measured. One end of the bent rod is hinged to the connecting rod 51, the other end of the bent rod penetrates through the strip-shaped through groove 21 and then is connected with the top end of the straight rod, and the fixing head 532 is arranged at the bottom end of the straight rod. And in particular the fixing head 532 is provided on the side wall opposite to the straight bar. A limiting component 6 for limiting the bent rod to slide upwards is detachably connected above the bent rod and on the strip-shaped through groove 21.

With reference to fig. 5, in this embodiment, the end of the opposite side wall of the straight rod is provided with a groove, a spring 531 is installed in the groove, an anti-drop cover 533 is covered on the groove, one end of the fixing head 532 is elastically matched with the spring 531, the other end of the fixing head 532 is preferably a bullet with a smooth surface and penetrates out of the installation space formed by matching the anti-drop cover 533 and the groove through an opening on the anti-drop cover 533, and meanwhile, the fixing head 532 is further provided with a limiting rib for limiting the penetration length of the bullet from the opening on the anti-drop cover 533.

Referring to fig. 1 and 5, in the present embodiment, the limiting component 6 is composed of a screw 62 and a nut 61 which are connected by screw threads, the screw 62 includes a rod portion and a stop portion vertically connected to one end of the rod portion, and the rod portion of the screw 62 is provided with external threads. The nut 61 includes a nipple threadedly coupled to the stem portion and a stem coupled to the nipple. The diameter of the rod part is adapted to the width of the strip-shaped through groove 21. The screw 62 and the nut 61 are inserted from the openings on both sides of the strip-shaped through groove 21 and are screwed and fixed, respectively, to complete the limitation of the slidable distance of the fixing claw 52 in the strip-shaped through groove 21. Of course, since the nut 61 is provided with the rotating handle in this embodiment, the inspector can adjust the position of the limiting component 6 on the strip-shaped through groove 21 by rotating the rotating handle.

Specifically, referring to fig. 2, in the present embodiment, in order to effectively control the fixed claw 52 to swing through the relative displacement change between the threaded rod 3 and the main frame 2, the swing amplitude of the fixed claw 52 is as close as possible in the axial direction of the measured bearing 100, so that the fixed claw 52 is close to the bearing inner ring 101 in a nearly vertical state, and after the bearing inner ring 101 is contacted, the fixed head 532 is vertically contacted and matched with the bearing inner ring 101, so as to ensure the effective limitation of the swing clamping assembly 5 on the axial inner ring. In the embodiment, the first fixing claw 52 is formed by connecting a first short straight rod 521, a second short straight rod 522 and a long straight rod, the inclination angle between the first short straight rod 521 and the connecting rod is 100-110 degrees, the included angle between the first short straight rod 521 and the second short straight rod 522 is 130-135 degrees, and the included angle between the second short straight rod 522 and the long straight rod connected with the second short straight rod is 147-152 degrees. Specifically, in this embodiment, the included angle between the first short straight rod 521 and the second short straight rod 522 is about 133 °, and the included angle between the second short straight rod 522 and the long straight rod connected thereto is 150 °. In addition, the relative angle limitation in the first fixed claw 52 can also control the swing speed of the first fixed claw 52, so as to avoid the collision between the fixed head 532 and the bearing inner ring 101 and influence the stability of the fit of the bearing inner ring 101 with the bearing outer ring and the cylindrical rollers.

Example 2 this example differs from example 1 in that: the curved bar is an arc-shaped bending structure, and the arc angle corresponding to the arc-shaped bending structure is 133-136 degrees. Compared with the structure of the double short straight rod in the embodiment 1, the structure of the embodiment is more convenient to process, the swing collision in the swing process of the fixed claw 52 is relatively less, but the controllability of the structure is lower than that of the structure of the double straight rod in the embodiment 1.

Example 3 this example differs from example 1 in that: in this embodiment, the straight rod includes a first rod and a second rod, wherein the first rod and the second rod are detachably and fixedly connected, for example, by a threaded connection, a snap connection, or a socket connection. One end of the first rod is hinged with the connecting rod 51, the other end of the first rod is fixedly connected with the second rod, the other end of the second rod is used as the bottom end of the straight rod, and the fixing head 532 described in embodiment 1 is arranged on the bottom end of the straight rod.

In conclusion, the invention provides the cylindrical roller bearing with the simple structure and the strong universality, which limits the axial displacement of the bearing inner ring 101 of the cylindrical roller bearing without the inner ring flange in a two-side clamping mode, and effectively avoids the situation that the bearing inner ring 101 is separated under the measuring condition. Through the control of the loading mechanism, the stability of the operation of the bearing inner ring 101 can be effectively stabilized.