Balance weight assembly and running-in experiment table for bearing test

Abstract

The utility model relates to the field of counterweight assemblies for bearing experiments, aims to solve the problems that a plurality of existing counterweight blocks are difficult to continuously overlap due to hanging rings, and the counterweight blocks need to be integrally replaced when the counterweight is adjusted, and provides a counterweight assembly which comprises the counterweight blocks and a connecting piece, a plurality of through holes are formed in the counterweight blocks in the axial direction, and the connecting piece is arranged in the through holes. The through hole comprises a large hole section and a small hole section, and the small hole section is provided with an internal thread; the connecting piece comprises a connecting rod and an annular head, the connecting rod is provided with an external thread and connected with the annular head, the length of the connecting rod is larger than that of the through hole, and the annular head can be contained in the large hole section. According to the utility model, after the balancing weights are provided with the through holes, the balancing weights can be matched with the connecting pieces to connect and fix the upper balancing weight and the lower balancing weight, so that relative displacement among the balancing weights during a running-in test is avoided; the balancing weights can be taken through the annular heads on the connecting pieces, and after the large hole sections in the through holes are used for containing the annular heads, the multiple balancing weights can be placed in an overlapped mode.

Description

Technical Field

[0001] The utility model relates to the field of counterweight components for bearing experiments, and more specifically, to a counterweight component and a running-in test bench for bearing testing. Background Art

[0002] The main purpose of the bearing running-in test is to detect the friction, wear, thermal expansion and contraction, etc. between the main shaft and the bearing by simulating the operation under actual working conditions, and to evaluate the service life and working efficiency of the mechanical main shaft. The bearing running-in test can also detect the matching states and performances such as the temperature and vibration intensity of the bearing under different working conditions, conduct an accelerated life test to evaluate the influence of new materials, new structures and new processes on the bearing life, and test the bearing service performance degradation evaluation and remaining life prediction methods. These tests are of great significance for ensuring the quality and stable operation of machinery and are one of the indispensable important tests in mechanical manufacturing.

[0003] The pressure on the bearing varies in magnitude and direction under different application conditions. When conducting the running-in test, it is necessary to change the compression counterweight of the bearing according to different usage conditions. At this time, the replacement and fixation of the counterweight blocks will be involved. In order to facilitate lifting, the existing counterweight blocks are often provided with hanging rings, which will affect the overlapping placement of each counterweight block. Therefore, it is difficult to overlap multiple counterweight blocks, and the entire counterweight needs to be replaced when adjusting the counterweight. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a counterweight component and a running-in test bench for bearing testing, so as to solve the problem that due to the hanging rings, it is difficult to achieve multiple continuous overlaps of the existing counterweight blocks, and the entire counterweight block needs to be replaced when adjusting the counterweight.

[0005] The embodiments of the utility model are realized by the following technical solutions:

[0006] A counterweight component, comprising: a counterweight block and a connecting member. The counterweight block is provided with a plurality of through holes along its axial direction. The through holes include a large hole section and a small hole section, and the small hole section is provided with internal threads; the connecting member includes a connecting rod and a ring head. The connecting rod is provided with external threads that match the internal threads. The connecting rod is connected to the ring head. The length of the connecting rod is greater than the length of the through hole, and the ring head can be accommodated in the large hole section.

[0007] Preferably, the plurality of through holes include a first hole group and a second hole group. The first hole group is used for the connecting member to connect the counterweight blocks below the first hole group, and the second hole group is used for the connecting member to connect the counterweight blocks above the second hole group.

[0008] Preferably, a through hole of the second hole group is provided between adjacent through holes in the first hole group.

[0009] Preferably, the counterweight block is further provided with a radial visual hole, and the visual hole communicates with the large hole section.

[0010] A running-in test bench for bearing testing includes: a mounting table, a rotating shaft, a cover plate and a counterweight assembly; the rotating shaft is rotatably connected to the mounting table, the rotating shaft is used for bearing installation, and the rotating shaft is arranged vertically; the cover plate is connected to one end of the rotating shaft away from the mounting table, and at least a part of the space between the cover plate and the mounting table is used to accommodate the bearing, and the bottom wall of the cover plate is used to abut against the bearing; the counterweight assembly is placed on the upper end of the cover plate.

[0011] Preferably, the test bench further includes: a plurality of clamping members, the clamping members are slidably connected to the top wall of the cover plate, and at least a part of the clamping members can extend into the visual hole.

[0012] Preferably, the clamping member includes: a clamping member and a plug-in block, the clamping member is slidably connected to the cover plate; the clamping wall of the clamping member is connected to the plug-in block, the clamping wall is an arc-shaped wall, and the plug-in block is plugged into the visual hole.

[0013] Preferably, the test bench further includes: a driving device, the output shaft of the driving device is connected to a driving gear, the rotating shaft is connected to a driven gear, and the driving gear is in transmission connection with the driven gear.

[0014] Preferably, a groove is provided on the bottom wall of the cover plate, a gap is left between the bottom wall of the groove and the top wall of the rotating shaft, the cover plate is provided with a first screw hole, and one end of the rotating shaft away from the mounting table is provided with a second screw hole, the first screw hole is directly opposite to the second screw hole, and the cover plate is connected to the rotating shaft through a bolt, and the bolt passes through the first screw hole and is connected to the second screw hole.

[0015] Preferably, the cover plate is provided with a receiving groove, the receiving groove communicates with the first screw hole, and the receiving groove can completely accommodate the head of the bolt.

[0016] The utility model has at least the following beneficial effects:

[0017] After the through holes are provided in the counterweight blocks of the utility model, the upper and lower counterweight blocks can be connected and fixed by cooperating with the connecting pieces, so as to avoid relative displacement between the counterweight blocks during the running-in test; the annular head on the connecting piece can be used to take and place the counterweight blocks, and after the large hole sections in the through holes are used to accommodate the annular heads, the overlapping placement of multiple counterweight blocks can be realized. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the attached drawings required for the embodiments. It should be understood that the following attached drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related attached drawings can also be obtained based on these attached drawings.

[0019] Figure 1 Schematic structural diagram after the overlapping installation of the counterweight assembly;

[0020] Figure 2 Schematic structural diagram of the counterweight block;

[0021] Figure 3 Schematic structural diagram of the counterweight assembly;

[0022] Figure 4 Schematic structural diagram of the running-in test bench for bearing testing;

[0023] Figure 5 Cross-sectional view of the running-in test bench for bearing testing;

[0024] Figure 6 Schematic structural diagram of the clamping member;

[0025] Figure 7 Schematic connection diagram of the cover plate and the rotating shaft;

[0026] Icon: 1 - counterweight block, 11 - through hole, 111 - large hole section, 112 - small hole section, 113 - first hole group, 114 - second hole group, 115 - visible hole, 2 - connecting member, 21 - connecting rod, 22 - annular head, 3 - mounting table, 4 - rotating shaft, 41 - driven gear, 5 - cover plate, 51 - groove, 6 - clamping member, 61 - clamping member, 62 - plug-in block, 7 - driving device, 71 - driving gear, 8 - bolt, 81 - head, 9 - accommodating groove, 10 - bearing. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the attached drawings here can be arranged and designed in various different configurations.

[0028] Embodiment 1: As Figure 1-3As shown in the figure, a counterweight assembly includes a counterweight block 1 and a connecting member 2. A plurality of through holes 11 are axially formed in the counterweight block 1. The through holes 11 include a large hole section 111 and a small hole section 112, and an internal thread is provided in the small hole section 112. The connecting member 2 includes a connecting rod 21 and a ring head 22. The connecting rod 21 is provided with an external thread that mates with the internal thread. The connecting rod 21 is connected to the ring head 22. The length of the connecting rod 21 is greater than the length of the through hole 11, and the ring head 22 can be accommodated in the large hole section 111.

[0029] During the specific implementation process, in order to test the operation of the bearing 10 under different pressure conditions, such as vibration, abnormal noise, and temperature. The counterweight during the test needs to be continuously changed. If the counterweight is only achieved by one counterweight block 1 each time, the number of counterweight blocks 1 is large. When using multiple counterweight blocks 1 for counterweight, various weight configurations can be achieved through the combination of counterweight blocks 1. However, multiple counterweight blocks 1 also have certain disadvantages compared to one counterweight block 1. Since the bearing 10 rotates continuously during operation, when only one counterweight block 1 is used, only one counterweight block 1 needs to be clamped and fixed. However, when multiple counterweight blocks 1 are used overlappingly, the problem of relative displacement that may occur between the counterweight blocks 1 during rotation needs to be solved, that is, the problem of the position stability of the counterweight blocks 1 needs to be addressed. At the same time, in order to facilitate the taking and placing of the counterweight blocks 1, the counterweight blocks 1 are generally provided with hanging rings, and the hanging rings will affect the overlapping of the counterweight blocks 1 with each other. Therefore, the applicant conceived a technical solution that uses the connecting member 2 to simultaneously achieve the position fixation and simple taking of the counterweight blocks 1. Through holes 11 are formed in the counterweight blocks 1, and the connecting member 2 can be used to connect the upper and lower layers of counterweight blocks 1 together. When the clamping member 616 clamps the bottom counterweight block 1, the position of the upper counterweight block 1 is also fixed. After setting the original hanging ring on the counterweight block 1 as the ring head 22 on the connecting member 2, using the characteristic that the ring head 22 can be accommodated in the large hole section 111, the influence on the overlapping placement of the upper and lower layers of counterweight blocks 1 is avoided, and at the same time, the function of facilitating the taking of the counterweight blocks 1 is retained.

[0030] Embodiment 2: In order to achieve the fixation after multiple counterweight blocks 1 are overlapped, improvements are made on the basis of Embodiment 1, as Figure 1-2 shown in the figure. In this embodiment, a plurality of the through holes 11 include a first hole group 113 and a second hole group 114. The first hole group 113 is used for the connecting member 2 to connect the counterweight blocks 1 below the first hole group 113, and the second hole group 114 is used for the connecting member 2 to connect the counterweight blocks 1 above the second hole group 114.

[0031] During the specific implementation process, Figure 2The black part in the middle is the second hole group 114. Taking the three-layer counterweight block 1 as an example for counterweight explanation, the first-layer counterweight block 1 and the second-layer counterweight block 1 can be connected through the first hole group 113, and the second-layer counterweight block 1 and the third-layer counterweight block 1 are connected through the second hole group 114. After the first-layer counterweight block 1 is clamped and fixed by the clamping member 616, when the bearing 10 rotates, the positions of the second-layer counterweight block 1 and the third-layer counterweight block 1 are stable, and adjacent counterweight blocks 1 are alternately connected through different hole groups.

[0032] During use, one counterweight block 1 can be configured first, then two counterweight blocks 1, and finally three counterweight blocks 1. When conducting experiments on the next bearing 10, the three connected counterweight blocks 1 can be directly used for counterweight, then one counterweight block 1 is removed, and finally another counterweight block 1 is removed. Repeating this way can simplify the counterweight operation of each bearing 10. Of course, four, five or even more counterweight blocks 1 can also be used, and counterweight blocks 1 of multiple different weights can be set to increase the number of counterweight combinations. The counterweight blocks 1 of different weights can only differ in thickness.

[0033] Embodiment 3: In order to achieve the stability of the connection between different counterweight blocks 1 and the uniform force during taking and placing, improvements are made on the basis of Embodiment 2. As Figure 2 shown, in this embodiment, a through hole 11 of the second hole group 114 is opened between adjacent through holes 11 in the first hole group 113.

[0034] During the specific implementation process, as Figure 2 shown, the through holes 11 of the first hole group 113 and the second hole group 114 are alternately arranged, so that all the connecting members 2 are evenly arranged on the counterweight block 1. The first hole group 113 and the second hole group 114 can both be provided with 4 through holes 11 as Figure 2 shown.

[0035] Embodiment 4: In order to better judge whether the connecting member 2 detaches from the lower-layer counterweight block 1, improvements are made on the basis of Embodiments 1 - 3. As Figure 3 shown, in this embodiment, the counterweight block 1 is further provided with a radial visual hole 115, and the visual hole 115 communicates with the large hole section 111.

[0036] During the specific implementation process, when removing a certain layer of counterweight block 1, the connecting member 2 needs to be rotated so that the connecting member 2 detaches from the lower-layer counterweight block 1. In order to better judge whether it is completely detached, the visual hole 115 can be set as Figure 3 shown. Through the visual hole 115, it can be observed whether the bottom end of the connecting member 2 completely enters the large hole section 111 of the counterweight block 1 to be removed. If it has completely entered, it can be determined that the connecting member 2 has completely detached from the lower-layer counterweight block 1.

[0037] Embodiment 5: As Figure 4-5As shown in the figure, a running-in test bench for bearing 10 testing includes: a mounting table 3, a rotating shaft 4, a cover plate 5, and a counterweight assembly; the rotating shaft 4 is rotatably connected to the mounting table 3, the rotating shaft 4 is used for mounting the bearing 10, and the rotating shaft 4 is arranged vertically; the cover plate 5 is connected to one end of the rotating shaft 4 away from the mounting table 3, and at least a part of the space between the cover plate 5 and the mounting table 3 is used for accommodating the bearing 10, and the bottom wall of the cover plate 5 is used to abut against the bearing 10; the counterweight assembly is placed on the upper end of the cover plate 5.

[0038] In the specific implementation process, this test bench is mainly applied to the running-in test when the bearing 10 is axially compressed. The installation method of the bearing 10 on the rotating shaft 4 is the prior art. During the running-in test, the outer ring of the bearing 10 can be fixed by bolts 8, and the inner ring rotates with the rotating shaft 4. The cover plate 5 directly abuts against the bearing 10. After placing the counterweight assembly on the cover plate 5, axial compression of the bearing 10 can be achieved.

[0039] Embodiment 6: In order to achieve the stability of the position of the counterweight assembly, an improvement is made on the basis of Embodiment 5, as Figure 4-5 shown. In this embodiment, the test bench further includes: a plurality of clamping members 616, the clamping members 616 are slidably connected to the top wall of the cover plate 5, and at least a part of the clamping members 616 can extend into the visual hole 115.

[0040] In the specific implementation process, the clamping member 616 can be as Figure 5 shown, only clamping the lowermost counterweight block 1. In order to avoid the mutual interference between the connecting member 2 and the clamping member 616, there are two solutions. One is that the through hole 11 for connecting the connecting member 2 and the visual hole 115 for the clamping member 616 are not connected. For example, if the connecting member 2 selects the first hole group 113, then the clamping member 616 selects the visual hole 115 corresponding to the second hole group 114. The other is to control the length of the connecting member 2 so that the bottom end of the connecting member 2 does not enter the large hole section 111 of the lowermost counterweight block 1. The sliding connection structure is the prior art and is usually realized by the cooperation of a slide rail and a slider. This embodiment will not be elaborated.

[0041] Embodiment 7: In order to improve the clamping stability of the clamping member 616, an improvement is made on the basis of Embodiment 6, as Figure 6 shown. In this embodiment, the clamping member 616 includes: a clamping member 616 and a plug-in block 62, the clamping member 616 is slidably connected to the cover plate 5; the clamping wall of the clamping member 616 is connected to the plug-in block 62, the clamping wall is an arc-shaped wall, and the plug-in block 62 is inserted into the visual hole 115.

[0042] In the specific implementation process, the plug-in block 62 can be as Figure 6As shown, it is smaller than the clamping member 616. When the plug-in block 62 is inserted into the visible hole 115, the clamping wall of the clamping member 616 abuts against the side wall of the counterweight 1, so that the clamping member 616 can not only clamp the counterweight 1 radially, but also prevent the relative sliding between the clamping member 616 and the side wall of the counterweight 1 when the radial clamping force is insufficient through the plug-in block 62.

[0043] Embodiment 8: In order to realize the rotation of the bearing 10, improvements are made on the basis of Embodiments 5-7. As Figure 5 shown, in this embodiment, the test bench further includes: a driving device 7, the output shaft of the driving device 7 is connected to the driving gear 71, the rotating shaft 4 is connected to the driven gear 41, and the driving gear 71 is in transmission connection with the driven gear 41.

[0044] During the specific implementation process, the driving device 7 can adopt a rotating motor. The driving device 7 drives the driving gear 71 to rotate, the driving gear 71 drives the driven gear 41 to rotate, and the driven gear 41 drives the rotating shaft 4 to rotate.

[0045] Embodiment 9: In order to make the bearing 10 better pressed, improvements are made on the basis of Embodiment 8. As Figure 7 shown, in this embodiment, a groove 51 is provided on the bottom wall of the cover plate 5, a gap is left between the bottom wall of the groove 51 and the top wall of the rotating shaft 4, the cover plate 5 is provided with a first screw hole, and one end of the rotating shaft 4 away from the mounting table 3 is provided with a second screw hole. The first screw hole is aligned with the second screw hole. The cover plate 5 is connected to the rotating shaft 4 through a bolt 8, and the bolt 8 passes through the first screw hole and is connected to the second screw hole.

[0046] During the specific implementation process, the bottom wall of the groove 51 is not directly in contact with the top wall of the rotating shaft 4, so that more pressure of the cover plate 5 is directly applied to the bearing 10. As Figure 7 shown, two or four bolts 8 are provided to fix the cover plate 5 and the rotating shaft 4. It should be noted that the central axes of the bolts 8 and the rotating shaft 4 are not on the same straight line.

[0047] Embodiment 10: In order to prevent the bolt 8 from interfering with the placement of the counterweight 1, improvements are made on the basis of Embodiment 9. As Figure 7 shown, in this embodiment, the cover plate 5 is provided with a receiving groove 9, the receiving groove 9 is communicated with the first screw hole, and the receiving groove 9 can completely receive the head 81 of the bolt 8.

[0048] During the specific implementation process, the head 81 of the bolt 8 is completely placed in the receiving groove 9, which can avoid the problem that the placement of the counterweight 1 is not stable enough when the head 81 is higher than the upper surface of the cover plate 5.

[0049] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, for ordinary technicians in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A counterweight assembly, characterized in that, Comprising: A number of counterweight blocks, wherein a number of through holes are axially formed in the counterweight blocks, the through holes include a large hole section and a small hole section, and internal threads are provided in the small hole section; A connecting member, the connecting member includes a connecting rod and an annular head, the connecting rod is provided with external threads that cooperate with the internal threads, the connecting rod is connected to the annular head, the length of the connecting rod is greater than the length of the through hole, and the annular head can be accommodated in the large hole section.

2. The counterweight assembly according to claim 1, wherein A number of the through holes include a first hole group and a second hole group, the first hole group is used for the connecting member to connect the counterweight blocks below the first hole group, and the second hole group is used for the connecting member to connect the counterweight blocks above the second hole group.

3. The counterweight assembly according to claim 2, wherein A through hole of the second hole group is formed between adjacent through holes in the first hole group.

4. The counterweight assembly according to any one of claims 1-3, characterized in that The counterweight block is further provided with a radial visual hole, and the visual hole communicates with the large hole section.

5. A running-in test bench for bearing testing, characterized in that, Comprising: An installation platform; A rotating shaft, the rotating shaft is rotatably connected to the installation platform, the rotating shaft is used for bearing installation, and the rotating shaft is arranged vertically; A cover plate, the cover plate is connected to one end of the rotating shaft away from the installation platform, at least a part of the space between the cover plate and the installation platform is used for accommodating a bearing, and the bottom wall of the cover plate is used for abutting against the bearing; The counterweight assembly according to claim 4, and the counterweight assembly is placed on the upper end of the cover plate.

6. The running-in test bench for bearing testing according to claim 5, characterized in that, This test bench further includes: A number of clamping members, the clamping members are slidably connected to the top wall of the cover plate, and at least a part of the clamping members can extend into the visual hole.

7. The running-in test bench for bearing testing according to claim 6, characterized in that The clamping member includes: A clamping member, the clamping member is slidably connected to the cover plate; A plug-in block, the clamping wall of the clamping member is connected to the plug-in block, the clamping wall is an arc-shaped wall, and the plug-in block is plugged into the visual hole.

8. The running-in test bench for bearing testing according to any one of claims 5-7, characterized in that, This test bench further includes: A driving device, the output shaft of the driving device is connected to a driving gear, the rotating shaft is connected to a driven gear, and the driving gear is in transmission connection with the driven gear.

9. The running-in test bench for bearing testing according to claim 8, characterized in that, A groove is provided on the bottom wall of the cover plate, a gap is left between the bottom wall of the groove and the top wall of the rotating shaft, a first screw hole is provided on the cover plate, a second screw hole is provided at one end of the rotating shaft away from the installation platform, the first screw hole is aligned with the second screw hole, and the cover plate is connected to the rotating shaft by a bolt, and the bolt passes through the first screw hole and is connected to the second screw hole.

10. The running-in test bench for bearing testing according to claim 9, characterized in that, A receiving groove is formed in the cover plate, the receiving groove communicates with the first screw hole, and the receiving groove can completely accommodate the head of the bolt.

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