RV reducer test bench

Abstract

The invention relates to the technical field of mechanical transmission test equipment, in particular to an RV speed reducer test bed which comprises a test piece tool fixed to a platform unit, a driving assembly and a loading assembly, and the driving assembly and the loading assembly are arranged on the two sides of the test piece tool and can slide relative to the platform unit. The test piece tool is specially used for fixing the RV speed reducer, the test piece tool is simple in structure, the test piece tool and the RV speed reducer are positioned and installed through the seam allowance, and rapid and high-precision installation can be achieved; main shafts, rigidly connected with the RV speed reducer, in the driving assembly and the loading assembly are positioned and fixed through bearing seats, the coaxiality of the RV speed reducer and the main shafts on the two sides is guaranteed, and stable mechanism operation during testing is guaranteed. And the torquemeter and the grating sensor are fixedly connected with the main shaft, so that the test precision is improved to the maximum extent, and the quality of the RV speed reducer is ensured.

Description

Technical Field

[0001] The present invention relates to the field of mechanical transmission test technical equipment, and particularly relates to an RV reducer test bench. Background Art

[0002] With the rapid development of automation technology and robots, the application of RV reducers is becoming more and more extensive, and the requirements for the accuracy and functional quality of RV reducers are also getting higher and higher. In order to meet the technical requirements, domestic manufacturers are also accelerating the development of high-quality RV reducers. The RV reducer test bench is an important equipment for detecting whether the developed RV reducer meets the quality requirements. The existing RV test benches usually directly install the RV reducer on the driving end, and the connection tooling structure is complex, which is not conducive to improving the accuracy of the test bench. Therefore, this case aims to provide an RV reducer test bench that is easy to install and can ensure accuracy. Summary of the Invention

[0003] The purpose of the present invention is to provide an RV reducer test bench for the deficiencies of the prior art. A separate tooling is set on the test bench to clamp the RV reducer to be tested, and movable driving ends and loading ends are arranged on both sides. Moreover, the tooling of the RV reducer is simple, and the coaxiality with the main shafts on both sides can be ensured through adjustment, so that the rigid connection accuracy between the RV reducer to be tested and the main shafts on both sides is guaranteed, thereby improving the test accuracy of the test bench.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a connection tooling between an RV reducer and a test bench, including a mounting frame screwed to a platform unit. An installation hole is provided on the vertical plate of the mounting frame, and an installation flange is coaxially installed in the installation hole and fixed by a circle of screws. The inner hole of the installation flange is sleeved on one end of the rigid outer sleeve of the RV reducer, and a sealing flange is sleeved on the other end of the rigid outer sleeve of the RV reducer. Long screws passing through the sealing flange, the middle protrusion of the rigid outer sleeve of the RV reducer, and the installation flange are used to fixedly connect the three. The installation flange and the sealing flange are both fitted and positioned with the RV reducer through inner stop mouths, and a sealing ring I is arranged on the connection surface between the sealing flange and the RV reducer. A fuel injection nozzle is provided on the sealing flange. The input end of the RV reducer is key-connected with an input connection flange shaft passing through the central hole of the sealing flange, and a sealing ring II is arranged between the input connection flange shaft and the sealing flange. The output end of the RV reducer is connected with an output connection flange by screws.

[0005] Preferably, the input connection flange shaft is T-shaped, and one end thereof is a disc-shaped flange; the output connection flange is I-shaped, and both ends thereof are disc-shaped flanges. The disc-shaped flange connected to the RV reducer is provided with an inner stop mouth for fitting and connecting with the RV reducer.

[0006] Preferably, the present invention further provides a test bench for an RV reducer, which adopts the above-mentioned connection tooling between the RV reducer and the test bench (hereinafter referred to as the test piece tooling), and includes a driving assembly arranged at the input end of the test piece tooling and a loading assembly arranged at the output end of the test piece tooling. Both the driving assembly and the loading assembly are slidably connected to the platform unit.

[0007] Preferably, the driving assembly includes a mounting base fixed to the platform unit. The mounting base is slidably connected with a moving base through a slider rail. The moving base is provided with a screw driving device. The screw driving device includes a screw rod driven to rotate by a hand wheel. The screw rod is threadedly connected with a screw nut fixed to the moving base.

[0008] Preferably, the driving assembly further includes a driving motor fixed to the moving base. The output shaft of the driving motor is connected with a driving main shaft through a coupling. The other end of the driving main shaft is fixedly connected with a torque meter. The output end of the torque meter is fixedly connected with the flange end of the input connecting flange shaft through a transition flange. The driving grating of the grating sensor is sleeved and fixedly connected outside the transition flange. The reading heads of the torque meter and the grating sensor are both fixed to the moving base.

[0009] Preferably, the coupling is a laminated flexible coupling.

[0010] The structure of the loading assembly is basically the same as that of the driving assembly, and they are symmetrically arranged on both sides of the test piece tooling.

[0011] Preferably, the driving main shaft is T-shaped and is arranged in the driving main shaft assembly. The flange end is fixedly connected with the torque meter. The driving main shaft assembly includes a bearing seat fixedly connected with the moving base. Two bearings are sleeved outside the driving main shaft and are rotatably connected with the bearing seat. An inner spacer sleeve and an outer spacer sleeve are coaxially sleeved between the two bearings. A spacer sleeve that abuts against the inner ring of the bearing and a bearing gland that abuts against the outer ring of the bearing and is fixedly connected to the bearing seat are arranged on the outer sides of the two bearings. A locking nut that prevents the axial movement of the driving main shaft is threadedly connected to the non-flange end of the driving main shaft.

[0012] Preferably, a plane is cut on the outer periphery of the end flange of the driving main shaft, and a blocking block that fits this plane to prevent the driving main shaft from rotating is fixed to the bearing seat by screws.

[0013] Preferably, the bearing seat is provided with a temperature sensor for detecting the temperature of the internal lubricating oil.

[0014] Preferably, the platform unit is provided with a number of adjusting blocks I. The adjusting blocks I are threadedly connected with bolts that can finely adjust the left and right positions of the test piece tooling and the mounting base.

[0015] Preferably, the moving base is provided with a plurality of adjusting blocks II, and the adjusting blocks II are threadedly connected to finely adjust the position of the driving motor relative to the moving base in the front-back, left-right directions, and the position of the bearing seat relative to the moving base in the left-right direction.

[0016] The beneficial effects of the present invention are as follows: An RV reducer test bench includes a specimen tooling fixed to the platform unit, and a driving assembly and a loading assembly arranged on both sides of the specimen tooling and slidable relative to the platform unit. In the present invention, the specimen tooling is dedicated to the fixation of the RV reducer. The structure of the specimen tooling is simple, and it is installed with the RV reducer through spigot positioning, enabling quick and high-precision installation. The main shafts rigidly connected to the RV reducer in the driving assembly and the loading assembly are positioned and fixed by bearing seats, ensuring the coaxiality of the RV reducer and the main shafts on both sides, and the smooth operation of the mechanism during the test. Moreover, the torque meter and the grating sensor are both fixedly connected to the main shaft, thereby maximizing the test accuracy and ensuring the quality of the RV reducer. Description of the Drawings

[0017] Figure 1 is a perspective view of an RV reducer test bench of the present invention; Figure 2 is a perspective view of the driving assembly; Figure 3 is a sectional plan view of the specimen tooling; Figure 4 is a perspective view of the driving main shaft assembly; Figure 5 is a sectional plan view of the driving main shaft assembly.

[0018] Description of the Reference Numerals: 1 - Platform unit, 2 - Specimen tooling, 201 - Mounting frame, 202 - Mounting hole, 203 - Mounting flange, 204 - RV reducer, 205 - Sealing flange, 206 - Long screw, 207 - Seal ring I, 208 - Grease nipple, 209 - Input connecting flange shaft, 210 - Seal ring II, 211 - Output connecting flange, 3 - Driving assembly, 301 - Mounting base, 302 - Moving base, 303 - Lead screw driving device, 304 - Driving motor, 305 - Coupling, 306 - Driving main shaft, 307 - Torque meter, 308 - Transition flange, 309 - Grating sensor, 4 - Driving main shaft assembly, 401 - Bearing seat, 402 - Bearing, 403 - Inner spacer, 404 - Outer spacer, 405 - Spacer, 406 - Bearing gland, 407 - Locking nut, 408 - Blocking block, 409 - Temperature sensor, 5 - Loading assembly, 6 - Adjusting block I, 7 - Adjusting block II. Detailed Embodiments

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0020] As Figures 1-5 shown, a test bench for an RV reducer in this embodiment includes a platform unit 1. A specimen tooling 2 for clamping the RV reducer 204 is fixed in the middle of the platform unit 1, and a driving assembly 3 for driving the RV reducer 204 and a loading assembly 5 for applying a load are arranged at both ends.

[0021] The platform unit 1 is an operating table provided with a large number of tool cabinets and plays a role of bearing and supporting in this embodiment.

[0022] The specimen tooling 2 includes a mounting frame 201 screwed to the platform unit 1. An installation hole 202 is provided on the vertical plate of the mounting frame 201. An installation flange 203 is coaxially installed in the installation hole 202 and fixed with a circle of screws. The inner hole of the installation flange 203 is sleeved on one end of the rigid outer sleeve of the RV reducer 204. The other end of the rigid outer sleeve of the RV reducer 204 is sleeved with a sealing flange 205. A long screw 206 passing through the sealing flange 205, the middle protrusion of the rigid outer sleeve of the RV reducer 204 and the installation flange 203 is provided to fixedly connect the three. The installation flange 203 and the sealing flange 205 are both fitted and positioned with the RV reducer 204 through inner rabbets, and a sealing ring 207 is provided on the connection surface between the sealing flange 205 and the RV reducer 204. The sealing flange 205 is provided with an oil filling nozzle 208. The input end of the RV reducer 204 is key-connected with an input connection flange shaft 209 passing through the central hole of the sealing flange 205. A sealing ring 210 is provided between the input connection flange shaft 209 and the sealing flange 205. The output end of the RV reducer 204 is screwed to an output connection flange 211. When installing the RV reducer 204, the RV reducer 204 can be quickly positioned and installed through the inner rabbet of the installation flange 203, and then fixed by using the long screw 206, so that the RV reducer 204 and the specimen tooling 2 become an integral and independent unit, not affected by external moving parts, and the clamping is convenient.

[0023] The platform unit 1 is respectively provided with a driving assembly 3 and a loading assembly 5 on both sides of the specimen tooling 2. Among them, the driving assembly 3 is connected to the input end (inner ring gear) of the RV reducer 204, and the loading assembly 5 has the same structural functional units as the driving assembly 3, but with different power configurations. In terms of functional units, the driving assembly 3 and the loading assembly 5 are symmetrically arranged relative to the specimen tooling 2. However, both the driving assembly 3 and the loading assembly 5 are slidably connected to the platform unit 1, and the distance from the specimen tooling 2 can be adjusted.

[0024] Among them, the driving assembly 3 includes a mounting base 301 fixed to the platform unit 1. The mounting base 301 is slidably connected to a moving base 302 through a slider rail. The moving base 302 is provided with a screw drive device 303. The screw drive device 303 includes a screw rotated by a handwheel, and the screw is threadedly connected to a screw nut fixed to the moving base 302. By turning the handwheel, the distance between the driving assembly 3 and the specimen tooling 2 can be adjusted.

[0025] The loading assembly 5 is directly slidably connected to the platform unit 1 through a slider rail and is controlled to move by the screw drive device 303 provided on the platform unit 1. In addition, the platform unit 1 is also provided with a locking mechanism that can fix the driving assembly 3 and the loading assembly 5 after their positions are adjusted.

[0026] The driving assembly 3 further includes a driving motor 304 fixed to the moving base 302. The output shaft of the driving motor 304 is connected to a driving main shaft 306 through a coupling 305. The other end of the driving main shaft 306 is fixedly connected to a torque meter 307. The output end of the torque meter 307 is fixedly connected to the flange end of the input connection flange shaft 209 through a transition flange 308. A driving grating of a grating sensor 309 is fixedly connected outside and combined with the transition flange 308. The reading heads of the torque meter 307 and the grating sensor 309 are both fixed to the moving base 302.

[0027] Among them, in order to improve the stability of the driving main shaft 306 and ensure its coaxiality with the RV reducer 204, a driving main shaft assembly 4 is provided in this embodiment, and the driving main shaft 306 is arranged in the driving main shaft assembly 4. The driving main shaft 306 is T-shaped, and its flange end is fixedly connected to the torque meter 307. The driving main shaft assembly 4 includes a bearing seat 401 fixedly connected to the moving base 302. Two bearings 402 are sleeved outside the driving main shaft 306 and are rotatably connected to the bearing seat 401. An inner spacer 403 and an outer spacer 404 are coaxially sleeved between the two bearings 402. A spacer 405 that abuts against the inner ring of the bearing 402 and a bearing gland 406 that abuts against the outer ring of the bearing 102 and is fixedly connected to the bearing seat 401 are arranged on the outer sides of the two bearings 402. A locking nut 407 for preventing the axial movement of the driving main shaft 306 is arranged at the non-flange end of the driving main shaft 306. In addition, a temperature sensor 409 for detecting the temperature of the internal lubricating oil is arranged on the bearing seat 401.

[0028] For the installation of the specimen tooling 2, the driving assembly 3, and the load assembly 5, or when the accuracy of the test bench needs to be readjusted after long-term operation, in order to facilitate this operation, several adjusting blocks 6 are provided on the platform unit 1. The adjusting blocks 6 are threadedly connected with bolts that can finely adjust the left and right positions of the specimen tooling 2 and the mounting base 301. The moving base 302 is provided with several adjusting blocks 7. The adjusting blocks 7 are threadedly connected with bolts that can finely adjust the front, rear, left, and right positions of the driving motor 304 relative to the moving base 302 and the left and right positions of the bearing seat 401 relative to the moving base 302.

[0029] The operation of this test bench will be described below taking the transmission error as an example.

[0030] First, fix the RV reducer 204 to the specimen tooling 2 through the long screw 206, and install the input connecting flange shaft 209 and the output connecting flange 211. Then adjust the driving assembly 3 and the load assembly 5 so that the transition flange 308 of the driving assembly 3 abuts against the input connecting flange shaft 209 and is fixed by screws, and the transition flange of the load assembly 5 abuts against the output connecting flange 211 and is also fixed by screws.

[0031] Before fixing and connecting the three with screws, in order to facilitate the installation of the screws, it is necessary to prevent the driving main shaft 306 from rotating. For this purpose, a plane is cut on the outer circumference of the end flange of the driving main shaft 306, and a blocking block 408 that fits this plane to prevent the driving main shaft 306 from rotating is fixed to the bearing seat 401 by screws. After the screws are driven in, the blocking block 408 is removed.

[0032] Start the drive assembly 3 to drive the RV reducer 204 to rotate, thereby driving the main shaft of the load assembly 5 to rotate. Record the rotation angle data of the grating sensor 309 at the drive end, that is, the input indicating any rotation angle (θin), and the rotation angle data of the grating sensor 309 at the load end, that is, the actual output rotation angle (θout). According to the transmission error formula θer = θin / R - θout (R: speed ratio), the transmission error between the theoretical output rotation angle and the actual output rotation angle of the RV reducer 204 can be obtained.

[0033] Taking the no-load torque test as an example for illustration.

[0034] Use the blocking block 408 to prevent the drive spindle 306 of the drive assembly 3 from rotating. Adjust the position of the drive assembly 3 to fixedly connect the transition flange 308 with the input connection flange shaft 209, so that the drive spindle 306 of the drive assembly 3 is fixedly connected to the input end of the RV reducer 204, and this connection is a rigid connection. In this test, the output end of the RV reducer 204 has no load, that is, it is not connected to the load assembly 5. Then slowly start the RV reducer 204 through the drive assembly 3, record the real-time torque, the sampling rate is not less than 1 kHz (i.e., the signal acquisition frequency), test to obtain the instantaneous maximum input torque as the no-load starting torque, and collect the input rotational speed torque of the test piece in real time, and draw the rotational speed-torque curve until the rotational speed is stable.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention. For the convenience of describing the technical solutions, the front, back, left, right, up, middle, down, etc. orientations used are based on the drawings, rather than a limitation on the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A connecting tooling for an RV reducer and a test bench, characterized in that: It includes a mounting bracket that is screwed to the platform unit. A mounting hole is provided on the vertical plate of the mounting bracket. An installation flange is coaxially installed in the mounting hole and fixed with a circle of screws. The inner hole of the installation flange is sleeved on one end of the rigid outer sleeve of the RV reducer. A sealing flange is sleeved on the other end of the rigid outer sleeve of the RV reducer. A long screw passing through the sealing flange, the middle bulge of the rigid outer sleeve of the RV reducer, and the installation flange is used to fixedly connect the three. The installation flange and the sealing flange are both fitted and positioned with the RV reducer through the inner stop. And a first sealing ring is provided on the connection surface between the sealing flange and the RV reducer. The sealing flange is provided with a grease nipple. The input end of the RV reducer is key-connected with an input connection flange shaft passing through the central hole of the sealing flange. A second sealing ring is provided between the input connection flange shaft and the sealing flange. The output end of the RV reducer is connected with an output connection flange by screws.

2. The connecting tooling for an RV reducer and a test bench according to claim 1, characterized in that: The input connection flange shaft is T-shaped, and one end is a disc-shaped flange; the output connection flange is "I"-shaped, and both ends are disc-shaped flanges. The disc-shaped flange connected to the RV reducer is provided with an inner stop for fitting and connecting with the RV reducer.

3. A test bench for an RV reducer, characterized in that: It adopts the connection tooling of the RV reducer described in claim 1 or 2 and the test bench (hereinafter referred to as the test piece tooling), which includes a driving assembly arranged at the input end of the test piece tooling and a loading assembly arranged at the output end of the test piece tooling. Both the driving assembly and the loading assembly are slidably connected to the platform unit.

4. A test bench for an RV reducer according to claim 3, characterized in that: The driving assembly includes a mounting base fixed to the platform unit. The mounting base is slidably connected with a moving base through a slider rail. The moving base is provided with a screw driving device. The screw driving device includes a screw rod driven to rotate by a handwheel. The screw rod is threadedly connected with a screw nut fixed to the moving base.

5. The RV reducer test bench according to claim 4, characterized in that: The driving assembly further includes a driving motor fixed to the moving base. The output shaft of the driving motor is connected with a driving main shaft through a coupling. The other end of the driving main shaft is fixedly connected with a torque meter. The output end of the torque meter is fixedly connected with the flange end of the input connection flange shaft through a transition flange. The driving grating of the grating sensor is sleeved and fixedly connected outside the transition flange. The reading heads of the torque meter and the grating sensor are both fixed to the moving base.

6. The test bench for an RV reducer according to claim 5, characterized in that: The driving main shaft is T-shaped and is arranged in the driving main shaft assembly. The flange end is fixedly connected with the torque meter. The driving main shaft assembly includes a bearing seat fixedly connected with the moving base. The driving main shaft is sleeved with two bearings and rotatably connected with the bearing seat. An inner spacer sleeve and an outer spacer sleeve are coaxially sleeved between the two bearings. On the outer sides of the two bearings, there are spacer sleeves that abut against the inner rings of the bearings, and bearing caps that abut against the outer rings of the bearings and are fixedly connected to the bearing seat. A locking nut for preventing the axial movement of the driving main shaft is threadedly connected to the non-flange end of the driving main shaft.

7. The RV reducer test bench according to claim 6, characterized in that: A plane is cut on the outer circumference of the end flange of the driving main shaft. The bearing seat is fixed with a blocking block that fits this plane to prevent the driving main shaft from rotating.

8. The test bench for an RV reducer according to claim 6, characterized in that: The bearing seat is provided with a temperature sensor for detecting the temperature of the internal lubricating oil.

9. The test bench for an RV reducer according to claim 4, characterized in that: The platform unit is provided with a number of first adjusting blocks, and the first adjusting blocks are threadedly connected with bolts for finely adjusting the tooling of the workpiece and the left and right positions of the mounting base.

10. A test bench for an RV reducer according to claim 4, characterized in that: The moving base is provided with a number of second adjusting blocks, and the second adjusting blocks are threadedly connected with bolts for finely adjusting the front, rear, left and right positions of the driving motor relative to the moving base, and the left and right positions of the bearing block relative to the moving base.

Images