Universal gear transmission running-in test device

Abstract

The invention discloses a universal gear drive running-in test device, and particularly relates to the technical field of gear drive tests.The universal gear drive running-in test device comprises a testbed, a positioning frame and a test block, and the positioning frame is fixed to the upper surface of the testbed; the test block is arranged above the positioning frame, and a driving convex shaft is arranged above the test block. According to the invention, the running-in condition between the two test gears is comprehensively detected from different point positions, so that three typical sudden working conditions of a driving end, a driven end and a load end are covered in a single test, the test scene is obviously expanded, the comprehensiveness and accuracy of the gear transmission running-in test are greatly improved, and the test efficiency is improved. The device is especially suitable for the running-in test of a gear transmission part of an electric vehicle driving system under the working conditions of high speed and high torque, thereby solving the problems that the test means of the whole gear transmission part is single, and the comprehensiveness and accuracy of the gear transmission running-in test are poor.

Description

Technical Field

[0001] This invention relates to the field of gear transmission testing technology, and more specifically, to a general-purpose gear transmission break-in testing device. Background Technology

[0002] With the rapid development of the electric vehicle industry, the gear transmission components in the electric vehicle drive system operate at high speeds, have large torques, and are subject to complex operating conditions, which places higher demands on the break-in test of the gear transmission system.

[0003] Among existing publicly available documents, patent publication number CN120702757A discloses a compatibility system and testing method for adapting an MT test bench to an AT transmission. This testing method includes preprocessing, assembly and connection, initialization settings, test run, monitoring and recording, and reset steps. The tests include a break-in test and a fixed gear durability test. Hydraulic pressure data is transmitted via two channels, and the system automatically shuts down in case of abnormalities. It achieves AT transmission testing compatibility by modifying an idle MT test bench, showing significant effects in improving resource utilization, reducing costs, and enhancing test adaptability and reliability. However, this technology still has the following problems.

[0004] When testing the drive system of electric vehicles, a transmission break-in test is required using general-purpose gears. This involves the drive gear shaft, the driven gear shaft, and the load area on the driven gear shaft. However, during the gear transmission test, it is difficult to quickly switch and block the gears according to their different transmission positions to check for any damage during the break-in process. This results in a limited range of testing methods for the entire gear transmission system, making it difficult to comprehensively cover all possible break-in scenarios. Consequently, the comprehensiveness and accuracy of the gear transmission break-in test are poor. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solution: a general-purpose gear transmission running-in test device, including a test bench, wherein a positioning frame is fixed on the upper surface of the test bench; A test block is set above the positioning frame, and a drive convex shaft is provided above the test block. A drive blocking test piece is installed on the test block. A driven cam shaft is provided on one side of the driving cam shaft, and a slanted groove block is provided below the driven cam shaft. A driven blocking test piece is installed on the slanted groove block. A load sleeve is fixed to the outer wall of the driven cam shaft. A stop block is provided on one side of the load sleeve, and a load blocking test piece is installed on the stop block. The drive unit is located on the outer wall of the positioning frame; When the driving cam and the driven cam rotate, the driving unit drives the driving blocking test piece, so that the driving blocking test piece drives the test block to contact the driving cam and perform a blocking test; The drive unit drives the driven blocking test piece, causing the driven blocking test piece to drive the inclined slot block to contact the driven convex shaft and perform a blocking test; The drive unit drives the load blocking test piece, causing the load blocking test piece to drive the stop block to contact the load sleeve and perform a blocking test.

[0006] In a preferred embodiment, the drive-blocking test piece includes: A guide block is fixedly connected to the bottom of the test block. A linkage column is fixed on one side of the guide block. Both the linkage column and the guide block are slidably connected to the positioning frame. A linkage block is fixed to the top of the outer wall of the linkage column. A spring strip is fixed on the upper surface of the linkage block, and the spring strip is used to provide elastic force to the linkage block. A support block is provided on the upper surface of the spring strip. The positioning frame and the spring strip are both fixedly connected to the support block.

[0007] In a preferred embodiment, the two elastic bars are symmetrically arranged about the middle of the support block, and the lower surface of the support block is arranged parallel to the upper surface of the linkage block.

[0008] In a preferred embodiment, the load-resistance test piece includes: An inclined pressure block is fixedly connected to the top of the stop block. An inclined frame is connected to the outer wall of the inclined pressure block. The inclined frame is used to guide the sliding of the inclined pressure block. The bottom end of the inclined frame is fixedly connected to the test bench. A sliding rod is fixed to one side of the inclined pressure block. A pressure strip is slidably connected to the top of the outer wall of the sliding rod. Both the pressure strip and the sliding rod are slidably connected to the inclined frame. An elastic plate is fixed to the bottom of the outer wall of the slide bar. One end of the elastic plate is fixedly connected to the inclined frame. The elastic plate is used to provide elastic force to the slide bar. A linkage bar is fixed to the bottom end of the pressure bar. A sleeve column is fixedly connected to the bottom end of the linkage bar. A support rod passes through the inner wall of the sleeve column. The support rod is fixedly connected to the test bench and is used to guide the sliding of the sleeve column.

[0009] In a preferred embodiment, the inclined pressure block is inclined, and a gap is provided between the stop block and the load sleeve.

[0010] In a preferred embodiment, the pressure strip and the linkage strip are arranged perpendicularly.

[0011] In a preferred embodiment, the driven blocking test piece includes: A slider is fixed to the bottom end of the inclined groove block. An inclined groove plate is slidably connected to the outer wall of the slider. The inclined groove plate is fixedly connected to the test bench and is used to guide the sliding of the inclined groove block. An inclined push plate slides at the bottom end of an inclined groove block. The inclined push plate is inclined and a moving strip is fixed at the bottom end of the inclined push plate. The moving strip is slidably connected to the inclined groove plate. A spring sheet is installed on one side of a sloping groove plate. The sloping groove plate and the moving bar are both fixedly connected to the spring sheet. The spring sheet is used to provide elastic force to the moving bar.

[0012] In a preferred embodiment, the cross-sectional area of ​​the upper surface of the inclined groove block is smaller than the cross-sectional area of ​​its lower surface, and the slider is inclined.

[0013] In a preferred embodiment, the driving unit includes; A servo motor is mounted on the outer wall of the positioning frame. A servo motor is installed at the output end of the servo motor, and a transmission bar is fixed at the output end of the servo motor. The servo motor is used to drive the transmission bar to rotate.

[0014] In a preferred embodiment, two test gears are provided on one side of the load sleeve. One test gear is fixedly connected to the drive cam shaft, and the other test gear is fixedly connected to the driven cam shaft. The two test gears are meshed and connected in a transmission manner. A bushing is rotatably connected to the outer wall of one end of the driving cam shaft. The bushing is detachably connected to the test bench by bolts, and the bushing is rotatably connected to the driven cam shaft. The driving cam and the driven cam are respectively inserted into the other end of the external mounting sleeve. A speed sensor is installed at one end of one of the mounting sleeves, and a drive motor is installed at one end of the speed sensor. The output end of the drive motor is used to drive the sensing end of the speed sensor to rotate. The outer walls of the drive motor and the speed sensor are fixedly connected to the test bench. Both mounting sleeves have rotatably connected sleeve plates on their outer walls. The sleeve plates are fixedly connected to the test bench. A switch is installed on one side of the test bench. The drive motor and speed sensor are electrically connected to the switch.

[0015] The technical effects and advantages of the present invention.

[0016] 1. This invention, by setting up drive blocking test pieces, driven blocking test pieces, and load blocking test pieces, can conduct rapid switching and jamming blocking tests on the drive camshaft, driven camshaft, and load sleeve respectively, simulating the operating conditions where each component is suddenly blocked and jammed. It comprehensively detects the running-in condition between two test gears from different points, thus covering three typical sudden operating conditions—drive end, driven end, and load end—in a single test. This significantly expands the test scenario, avoids missing potential problems due to a single test, and greatly improves the comprehensiveness and accuracy of gear transmission running-in tests. It is especially suitable for running-in tests of gear transmission components in electric vehicle drive systems under high-speed and high-torque conditions, providing a reliable testing method for the manufacturing and quality inspection of electric vehicle-related facilities.

[0017] 2. In this invention, the inclined block slides along the inclined surface of the inclined frame in the load blocking test piece to achieve the inclined cutting of the block. In the driven blocking test piece, the slider is guided in the inclined groove plate to make the inclined groove block rise along a predetermined inclined trajectory. In the driving blocking test piece, the guide block slides vertically in the positioning frame to ensure the vertical impact of the test block. This multi-directional guiding design that combines vertical and inclined directions enables each blocking component to quickly and reliably contact and stop the moving drive cam, driven cam, and load sleeve with the optimal path and angle, thereby accurately simulating the real mechanical state of sudden jamming at different nodes of the transmission chain and improving the accuracy and reliability of the test data. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the universal gear transmission break-in test device of the present invention.

[0019] Figure 2 This is a schematic diagram of the vertical cross-section structure of the universal gear transmission break-in test device of the present invention.

[0020] Figure 3 This is a partial structural diagram of the vertical cross-section at the connection between the linkage column and the linkage block of the present invention.

[0021] Figure 4 This is a partial structural diagram of the connection between the linkage strip and the pressure strip of the present invention.

[0022] Figure 5 This is a partial structural diagram of the driven convex shaft and the inclined groove block cut in the vertical section of the present invention.

[0023] Figure 6 This is a partial structural diagram of the vertical cross-section at the connection between the slider and the inclined groove plate of the present invention.

[0024] Figure 7 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.

[0025] Figure 8This is a top view schematic diagram of the general-purpose gear transmission break-in test device of the present invention.

[0026] The attached figures are labeled as follows: 1. Test bench; 2. Positioning frame; 3. Test block; 4. Drive cam shaft; 5. Driven cam shaft; 6. Inclined slot block; 7. Load sleeve; 8. Stop block; 9. Guide block; 10. Linkage column; 11. Linkage block; 12. Spring bar; 13. Support block; 14. Inclined pressure block; 15. Inclined frame; 16. Slide rod; 17. Pressure bar; 18. Linkage bar; 19. Sleeve column; 20. Support rod; 21. Slider; 22. Inclined slot plate; 23. Inclined push plate; 24. Moving bar; 25. Spring piece; 26. Servo motor; 27. Servo motor; 28. Transmission bar; 29. ​​Test gear; 30. Bushing; 31. Mounting sleeve; 32. Speed ​​sensor; 33. Transmission motor; 34. Switch; 35. Socket plate; 36. Elastic piece. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Example 1: like Figure 1 - Figure 8 The universal gear transmission break-in test device shown includes a test bench 1, with a positioning frame 2 fixed on the upper surface of the test bench 1; a test block 3, positioned above the positioning frame 2, with a drive cam 4 above the test block 3 and a drive blocking test piece installed on the test block 3; a driven cam 5, positioned on one side of the drive cam 4, with a slanted groove block 6 below the driven cam 5 and a driven blocking test piece installed on the slanted groove block 6; a load sleeve 7, fixed to the outer wall of the driven cam 5, with a stop block 8 on one side of the load sleeve 7 and a load blocking test piece installed on the stop block 8; and a drive unit, positioned on the outer wall of the positioning frame 2.

[0030] In this embodiment, when the driving cam 4 and the driven cam 5 rotate, the drive unit drives the drive blocking test piece, causing the drive blocking test piece to bring the test block 3 into contact with the driving cam 4 and perform a blocking test. At this time, the driving cam 4 simulates the operating condition of being suddenly blocked and jammed. The drive unit drives the driven blocking test piece, causing the driven blocking test piece to bring the inclined groove block 6 into contact with the driven cam 5 and perform a blocking test. At this time, the driven cam 5 simulates the operating condition of being suddenly blocked and jammed. The drive unit drives the load blocking test piece, causing the load blocking test piece to bring the stop block 8 into contact with the load sleeve 7 and perform a blocking test. At this time, the load... The 7th sleeve simulates a sudden jamming operation. After the operation is completed, the meshing wear condition of the test gear 29 on the drive camshaft 4 and the test gear 29 on the outer wall of the driven camshaft 5 can be checked. If there is no wear, the test is qualified. If there is a breakage problem due to meshing wear, the test is unqualified. The jamming test can be quickly switched according to different positions of the drive camshaft 4, the driven camshaft 5 and the load sleeve 7 to check whether there is any damage problem in the running-in between the two test gears 29. The jamming test from different points of the drive camshaft 4, the driven camshaft 5 and the load sleeve 7 comprehensively covers the running-in problem scenarios, making the gear transmission running-in test more excellent.

[0031] Example 2: In this embodiment, as Figure 1 - Figure 3 As shown, the drive blocking test piece includes: a guide block 9, fixedly connected to the bottom end of the test block 3, with a linkage column 10 fixed to one side of the guide block 9; both the linkage column 10 and the guide block 9 are slidably connected to the positioning frame 2; a linkage block 11, fixed to the top of the outer wall of the linkage column 10; a spring strip 12 fixed to the upper surface of the linkage block 11, and the spring strip 12 is used to provide elastic force to the linkage block 11; a support block 13 is provided on the upper surface of the spring strip 12; both the positioning frame 2 and the spring strip 12 are fixedly connected to the support block 13. The two spring strips 12 are symmetrically arranged about the middle of the support block 13, and the lower surface of the support block 13 is parallel to the upper surface of the linkage block 11.

[0032] In this embodiment, when the driving cam 4 and the driven cam 5 rotate, the linkage column 10 is driven to move upward. The linkage column 10 presses the linkage block 11 upward, and the linkage block 11 presses the two spring bars 12. The spring bars 12 perform a compression operation on the support block 13. In this way, the spring bars 12 provide elastic force to the linkage block 11. At the same time, the linkage column 10 drives the guide block 9 to move upward. The guide block 9 moves upward along the inner wall of the positioning frame 2. The guide block 9 drives the test block 3 to move upward. When the test block 3 contacts the protruding part of the outer wall of the driving cam 4, the driving cam 4 collides with the test block 3. A blocking test is performed between the test block 3 and the driving cam 4. At this time, the driving cam 4 simulates the operating condition of being suddenly blocked and stuck. Through this test from the part of the driving cam 4, it is checked whether there is any damage problem in the wear between the two test gears 29.

[0033] Example 3: In this embodiment, as Figure 2 - Figure 4 As shown, the load-blocking test piece includes: a slanted pressure block 14, fixedly connected to the top of the stop block 8, with a slanted frame 15 connected to the outer wall of the slanted pressure block 14, the slanted frame 15 being used to guide the slanted pressure block 14 to slide, and the bottom end of the slanted frame 15 being fixedly connected to the test bench 1; a sliding rod 16, fixed to one side of the slanted pressure block 14, with a pressure strip 17 slidably connected to the top of the outer wall of the sliding rod 16, and both the pressure strip 17 and the sliding rod 16 being slidably connected to the slanted frame 15; an elastic plate 36, fixed to the bottom end of the outer wall of the sliding rod 16, with one end of the elastic plate 36 being fixedly connected to the slanted frame 15, and the elastic plate 36 being used to provide elastic force to the sliding rod 16; and a linkage bar 18, fixed to the bottom end of the pressure strip 17, with a sleeve post 19 fixedly connected to the bottom end of the linkage bar 18, and a support rod 20 penetrating through the inner wall of the sleeve post 19, the support rod 20 being fixedly connected to the test bench 1, and the support rod 20 being used to guide the sleeve post 19 to slide. The inclined pressure block 14 is set at an angle, and there is a gap between the stop block 8 and the load sleeve 7. The pressure strip 17 and the linkage strip 18 are set vertically.

[0034] In this embodiment, when the driving cam 4 and the driven cam 5 rotate, the driven cam 5 will drive the load sleeve 7 to rotate, driving the sleeve post 19 to move downward. The sleeve post 19 begins to move downward along the outer wall of the support rod 20. The sleeve post 19 drives the linkage bar 18 to move downward, and the linkage bar 18 causes the pressure bar 17 to move downward. The pressure bar 17 will squeeze the slide rod 16, and the slide rod 16 will slide down the inner wall of the inclined frame 15 at an angle. At the same time, the slide rod 16 squeezes the elastic piece 36. One end of the elastic piece 36 is limited and fixed by the inclined frame 15, so the elastic piece 36 begins to compress, thereby providing elasticity to the slide rod 16. The force operation is used to drive the inclined pressure block 14 to tilt downward through the slide rod 16. The inclined pressure block 14 tilts downward along the inner wall of the inclined frame 15. The inclined pressure block 14 drives the stop block 8 to tilt downward. The stop block 8 is located within the rotation range of the load sleeve 7. At this time, the stop block 8 contacts the load sleeve 7 and performs a blocking test. The load sleeve 7 simulates the operating condition of being suddenly jammed. After the load sleeve 7 is jammed, the driven cam shaft 5 remains stationary. The running-in status of the test gear 29 on the outside of the drive cam shaft 4 and the test gear 29 on the outer wall of the driven cam shaft 5 is checked to see if there is any damage problem in the running-in between the two test gears 29.

[0035] Example 4: In this embodiment, as Figure 2 - Figure 6As shown, the driven blocking test piece includes: a slider 21, fixed to the bottom end of the inclined slot block 6, with an inclined slot plate 22 slidably connected to the outer wall of the slider 21. The inclined slot plate 22 is fixedly connected to the test bench 1 and is used to guide the sliding of the inclined slot block 6; an inclined push plate 23, sliding at the bottom end of the inclined slot block 6, with the inclined push plate 23 inclined and the bottom end of the inclined push plate 23 fixed with a moving strip 24, which is slidably connected to the inclined slot plate 22; and a spring piece 25, installed on one side of the inclined slot plate 22. Both the inclined slot plate 22 and the moving strip 24 are fixedly connected to the spring piece 25, which provides elastic force to the moving strip 24. The cross-sectional area of ​​the upper surface of the inclined slot block 6 is smaller than that of its lower surface, and the slider 21 is inclined.

[0036] In this embodiment, when the driving cam 4 and the driven cam 5 rotate, the driving moving bar 24 moves forward. The moving bar 24 is guided forward along the upper part of the inclined groove plate 22. The moving bar 24 pulls the spring piece 25. After the spring piece 25 is stretched, it provides a regenerative elastic force to the moving bar 24. In this way, the moving bar 24 drives the inclined push plate 23 to move forward. The inclined push plate 23 squeezes the inclined groove block 6. Under the inclined surface state of the inclined push plate 23, the inclined groove block 6 tilts and moves upward. The inclined groove block 6 drives the slider 21 to tilt and slide upward. The inclined groove block 6 tilts and moves upward, so that the inclined groove block 6 contacts the driven cam 5 and performs a blocking test. At this time, the driven cam 5 simulates the operating condition of being suddenly blocked and stuck. The running-in status of the test gear 29 on the outside of the driving cam 4 and the test gear 29 on the outer wall of the driven cam 5 is checked to see if there is any damage problem in the running-in between the two test gears 29.

[0037] Example 5: In this embodiment, as Figure 7 As shown, the drive unit includes a servo motor 26, which is mounted on the outer wall of the positioning frame 2. A servo motor 27 is mounted on the output end of the servo motor 26. A transmission bar 28 is fixed to the output end of the servo motor 27. The servo motor 27 is used to drive the transmission bar 28 to rotate.

[0038] In this embodiment, when the linkage column 10 is driven to move upward, the servo motor 26 drives the servo motor 27 to rotate clockwise. The servo motor 27 drives the transmission bar 28 to rotate vertically clockwise, thereby the transmission bar 28 presses against the linkage column 10, causing the linkage column 10 to move upward when driven.

[0039] When the drive sleeve 19 moves down, the servo motor 26 drives the servo motor 27 to rotate counterclockwise. The servo motor 27 drives the transmission bar 28 to rotate counterclockwise. The transmission bar 28 presses against the sleeve 19, causing the sleeve 19 to start moving downward.

[0040] When the drive moving bar 24 moves forward, the servo motor 27 needs to be activated. The servo motor 27 drives the transmission bar 28 to rotate counterclockwise laterally, so that the transmission bar 28 squeezes the moving bar 24, causing the moving bar 24 to start guiding and moving forward. In this way, the servo motor 27 and the servo motor 26 can quickly switch the drive in one area. According to the different positions of the drive cam 4, the driven cam 5 and the load sleeve 7, a quick switching jamming test can be performed to simulate the operation of the two test gears 29 under different working conditions.

[0041] In this embodiment, as Figure 8 As shown, two test gears 29 are provided on one side of the load sleeve 7. One test gear 29 is fixedly connected to the drive cam 4, and the other test gear 29 is fixedly connected to the driven cam 5. The two test gears 29 are meshed and connected for transmission. A bushing 30 is rotatably connected to the outer wall of one end of the drive shaft 4. The bushing 30 is detachably connected to the test bench 1 by bolts. The bushing 30 is rotatably connected to the driven shaft 5. Mounting sleeves 31 are respectively inserted into the outer walls of the other ends of the drive shaft 4 and the driven shaft 5. A speed sensor 32 is installed at one end of one mounting sleeve 31. A drive motor 33 is installed at one end of the speed sensor 32. The output end of the drive motor 33 is used to drive the sensing end of the speed sensor 32 to rotate. The outer walls of the drive motor 33 and the speed sensor 32 are fixedly connected to the test bench 1. A sleeve plate 35 is rotatably connected to the outer walls of both mounting sleeves 31. The sleeve plate 35 is fixedly connected to the test bench 1. A switch 34 is installed on one side of the test bench 1. The drive motor 33 and the speed sensor 32 are electrically connected to the switch 34.

[0042] When this technology is in use, if the driven cam 5 and the driving cam 4 are driven, the transmission motor 33 needs to be started by the switch 34. The transmission motor 33 drives the sensing end of the speed sensor 32 to rotate. The sensing end of the speed sensor 32 drives the mounting sleeve 31 to rotate. The mounting sleeve 31 drives the driving cam 4 to rotate. The driving cam 4 causes the test gear 29 to mesh and transmit power. At the same time, the test gear 29 drives another test gear 29 to mesh and transmit power. The other test gear 29 causes the driven cam 5 to rotate. The driven cam 5 drives the load sleeve 7 to rotate. At the same time, both the driving cam 4 and the driven cam 5 rotate inside the bushing 30. The two mounting sleeves 31 continue to rotate stably on the inner walls of the two sleeve plates 35. By sensing the speed through the speed sensor 32, it can be ensured that the driving cam 4 and the driven cam 5 transmit power at a specified speed, thereby controlling the test speed of the driving cam 4 and the driven cam 5. The test simulates a rapid switching jamming and blocking test at a specified speed based on the different positions of the driving cam 4, the driven cam 5 and the load sleeve 7, simulating more sudden working conditions.

[0043] This device is particularly suitable for running-in testing of reducer gears in electric vehicle drive systems. By simulating the operating conditions of an electric vehicle drive motor under different speeds and loads, it conducts a comprehensive running-in test on the reducer gears, ensuring the manufacturing quality of electric vehicle-related components.

[0044] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A general-purpose gear transmission break-in test device, comprising a test bench (1), characterized in that: The upper surface of the test bench (1) is fixed with a positioning frame (2); The test block (3) is set above the positioning frame (2), and a drive convex shaft (4) is provided above the test block (3). A drive blocking test piece is installed on the test block (3). A driven cam shaft (5) is provided on one side of the driving cam shaft (4), and a slanted block (6) is provided below the driven cam shaft (5). A driven blocking test piece is installed on the slanted block (6). A load sleeve (7) is fixed to the outer wall of the driven cam (5). A stop block (8) is provided on one side of the load sleeve (7), and a load blocking test piece is installed on the stop block (8). The driving unit is located on the outer wall of the positioning frame (2); When the driving cam (4) and the driven cam (5) rotate, the driving unit drives the driving blocking test piece, so that the driving blocking test piece drives the test block (3) to contact the driving cam (4) and perform a blocking test; The driving unit drives the driven blocking test piece, causing the driven blocking test piece to drive the inclined slot block (6) to contact the driven convex shaft (5) and perform a blocking test; The drive unit drives the load blocking test piece, causing the load blocking test piece to drive the stop (8) to contact the load sleeve (7) and perform a blocking test.

2. The universal gear transmission break-in test device according to claim 1, characterized in that: The drive-blocking test piece includes: The guide block (9) is fixedly connected to the bottom of the test block (3). A linkage column (10) is fixed on one side of the guide block (9). Both the linkage column (10) and the guide block (9) are slidably connected to the positioning frame (2). Linkage block (11) is fixed to the top of the outer wall of linkage column (10). A spring strip (12) is fixed on the upper surface of the linkage block (11), and the spring strip (12) is used to provide elastic force to the linkage block (11). A support block (13) is provided on the upper surface of the spring strip (12). The positioning frame (2) and the spring strip (12) are both fixedly connected to the support block (13).

3. The universal gear transmission break-in test device according to claim 2, characterized in that: The two elastic bars (12) are symmetrically arranged about the middle of the support block (13), and the lower surface of the support block (13) is arranged parallel to the upper surface of the linkage block (11).

4. The universal gear transmission break-in test device according to claim 1, characterized in that: The load-blocking test piece includes: An inclined pressure block (14) is fixedly connected to the top of the stop block (8). An inclined frame (15) is connected to the outer wall of the inclined pressure block (14). The inclined frame (15) is used to guide the inclined pressure block (14) to slide. The bottom end of the inclined frame (15) is fixedly connected to the test bench (1). A sliding rod (16) is fixed to one side of the inclined pressure block (14). A pressure strip (17) is slidably connected to the top of the outer wall of the sliding rod (16). Both the pressure strip (17) and the sliding rod (16) are slidably connected to the inclined frame (15). An elastic piece (36) is fixed to the bottom of the outer wall of the slide bar (16). One end of the elastic piece (36) is fixedly connected to the inclined frame (15). The elastic piece (36) is used to provide elastic force to the slide bar (16). Linkage bar (18) is fixed to the bottom end of pressure bar (17). A sleeve column (19) is fixedly connected to the bottom end of the linkage bar (18). A support rod (20) passes through the inner wall of the sleeve column (19). The support rod (20) is fixedly connected to the test bench (1). The support rod (20) is used to guide the sleeve column (19) to slide.

5. The universal gear transmission break-in test device according to claim 4, characterized in that: The inclined pressure block (14) is inclined, and there is a gap between the stop block (8) and the load sleeve (7).

6. The universal gear transmission break-in test device according to claim 4, characterized in that: The pressure strip (17) and the linkage strip (18) are arranged vertically.

7. The universal gear transmission break-in test device according to claim 1, characterized in that: The driven blocking test piece includes: The slider (21) is fixed to the bottom end of the inclined block (6). The outer wall of the slider (21) is slidably connected to the inclined plate (22). The inclined plate (22) is fixedly connected to the test bench (1). The inclined plate (22) is used to guide the inclined block (6) to slide. An inclined push plate (23) slides at the bottom end of an inclined groove block (6). The inclined push plate (23) is inclined and a moving strip (24) is fixed at the bottom end of the inclined push plate (23). The moving strip (24) is slidably connected to the inclined groove plate (22). A spring sheet (25) is installed on one side of a sloping plate (22), and both the sloping plate (22) and the moving bar (24) are fixedly connected to the spring sheet (25). The spring sheet (25) is used to provide elastic force to the moving bar (24).

8. The universal gear transmission break-in test device according to claim 7, characterized in that: The cross-sectional area of ​​the upper surface of the inclined groove block (6) is smaller than the cross-sectional area of ​​its lower surface, and the slider (21) is inclined.

9. The universal gear transmission break-in test device according to claim 1, characterized in that: The driving unit includes; A servo motor (26) is installed on the outer wall of the positioning frame (2). A servo motor (27) is installed at the output end of the servo motor (26). A transmission bar (28) is fixed at the output end of the servo motor (27). The servo motor (27) is used to drive the transmission bar (28) to rotate.

10. The universal gear transmission break-in test device according to claim 1, characterized in that: Two test gears (29) are provided on one side of the load sleeve (7). One test gear (29) is fixedly connected to the drive cam shaft (4), and the other test gear (29) is fixedly connected to the driven cam shaft (5). The two test gears (29) are meshed and connected in a transmission manner. A bushing (30) is rotatably connected to the outer wall of one end of the driving cam shaft (4). The bushing (30) is detachably connected to the test bench (1) by bolts. The bushing (30) is rotatably connected to the driven cam shaft (5). The drive shaft (4) and the driven shaft (5) are respectively connected to the outer side of the other end of the mounting sleeve (31). One end of the mounting sleeve (31) is equipped with a speed sensor (32). One end of the speed sensor (32) is equipped with a drive motor (33). The output end of the drive motor (33) is used to drive the sensing end of the speed sensor (32) to rotate. The outer walls of the drive motor (33) and the speed sensor (32) are fixedly connected to the test bench (1). Both of the mounting sleeves (31) are rotatably connected to the outer walls of the sleeves (35), and the sleeves (35) are fixedly connected to the test bench (1). A switch (34) is installed on one side of the test bench (1), and the drive motor (33) and the speed sensor (32) are electrically connected to the switch (34).

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