Speed reducer testing device

Abstract

The invention belongs to the field of speed reducer testing, and particularly relates to a speed reducer testing device which comprises a mounting plate and a plurality of counterweight rings rotationally arranged on the mounting plate, and the counterweight rings are sequentially and concentrically arranged from large to small in size. A rotating shaft mounting hole is formed in the mounting plate, is formed in the inner position of the counterweight ring on the innermost side, and is concentric with the counterweight ring; an active telescopic mechanism is arranged on the inner wall of the balance weight ring in the radial direction. A connecting groove is formed in the outer wall of the balance weight ring in the radial direction. Through the arrangement, after the speed reducer is mounted on the mounting plate, the motor connected with the speed reducer is electrified and controlled, so that the motor can be matched with the counterweight ring on the innermost side to perform load test after the rotating shaft is driven to rotate, the operation of increasing and reducing the load is convenient to control, and increasing and decreasing of the load can be realized; and sudden increase and sudden decrease of the load can also be realized.

Description

Technical Field

[0001] The invention belongs to the field of speed reducer testing, and in particular relates to a speed reducer testing device. Background Art

[0002] The reducer is a relatively precise machine that matches the speed and transmits torque between the prime mover and the working machine or actuator. Its purpose is to reduce the speed and increase the torque. Therefore, the load capacity and rotation accuracy of the reducer are also very important. In the existing reducer load test platform, the operation of increasing and decreasing the load is cumbersome, and the size and type of the load need to be adjusted manually, making the test process inefficient. At the same time, due to the complexity of docking the reducer with the reducer load test platform, professional personnel are required to operate and debug, which increases the difficulty and cost of the test.

[0003] In order to solve the above problems, it is necessary to provide a new type of reducer load test platform, which can quickly adjust the load size, simplify the docking process between the reducer and the test platform, and improve the test efficiency and accuracy. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a reducer testing device which can quickly adjust the load size and provide multiple adjustment modes.

[0005] The present invention provides a speed reducer testing device, comprising a mounting plate and a plurality of weight rings rotatably arranged on the mounting plate, wherein the plurality of weight rings are arranged concentrically in descending order of size;

[0006] The mounting plate is provided with a shaft mounting hole, which is arranged inside the innermost counterweight ring and is concentric with the counterweight ring;

[0007] The inner wall of the counterweight ring is provided with a mounting groove in the radial direction, and an active telescopic mechanism is provided in the mounting groove, and the output end of the active telescopic mechanism has a moving stroke of extending and retracting the inner wall of the counterweight ring;

[0008] The outer wall of the counterweight ring is radially provided with a connecting groove, the active telescopic mechanism on the innermost counterweight ring is used to cooperate with the keyway of the rotating shaft of the reducer to be tested, and the active telescopic mechanism on the outer counterweight ring is used to cooperate with the connecting groove on the inner counterweight ring.

[0009] Furthermore, the active telescopic mechanism comprises a block, a telescopic member, a spring and an electromagnet;

[0010] The block is provided with a sliding cavity, a telescopic hole communicating with one end of the sliding cavity, and a guide hole located at the other end of the sliding cavity;

[0011] The telescopic member comprises a telescopic rod and a spring limiting plate arranged on the telescopic rod, the two ends of the telescopic rod are respectively slidably fitted in the telescopic hole and the guide hole, and the spring limiting plate is slidably fitted in the sliding cavity;

[0012] The spring is sleeved on the telescopic rod, and one end of the spring abuts against the spring limit plate, and the other end abuts against the end surface of the sliding cavity;

[0013] The electromagnet is arranged on the end surface of the sliding cavity, and the electromagnet is magnetically matched with the spring limiting disk.

[0014] Furthermore, the electromagnet is a ring-shaped electromagnet, the electromagnet is arranged in contact with the inner wall of the sliding cavity, and an iron ring is arranged on the outer wall of the spring limiting disk protruding toward the electromagnet.

[0015] Furthermore, there are multiple groups of connecting grooves and active telescopic mechanisms on each counterweight ring in a ring array, and a photoelectric sensor is provided on the output end of each active telescopic mechanism.

[0016] Furthermore, the mounting plate is provided with an annular mounting groove, and the counterweight ring is provided with a matching ring;

[0017] A bearing is arranged between the outer wall of the matching ring and the inner wall of the annular mounting groove.

[0018] Furthermore, a first limiting convex ring is provided on the inner wall of the annular mounting groove facing the outer ring of the bearing, and a second limiting convex ring is provided on the outer wall of the matching ring facing the inner ring of the bearing.

[0019] Furthermore, a retaining ring is arranged in the annular mounting groove between the first limiting protrusion and the groove bottom, a mounting cavity is formed between the retaining ring and the bottom of the annular mounting groove, a third limiting protrusion is arranged at the end of the mating ring protruding toward the mounting cavity, and a thrust ball bearing is arranged between the third limiting protrusion and the retaining ring.

[0020] Furthermore, a bracket is arranged at the bottom of the mounting plate.

[0021] Furthermore, chamfers are provided on both sides of the connecting groove.

[0022] Furthermore, the reducer testing device further comprises a plurality of damping mechanisms, the number of the damping mechanisms being consistent with the number of the counterweight rings;

[0023] The damping mechanism comprises a damper, a driven wheel arranged on the output end of the damper, a driving wheel arranged on the counterweight ring, and a synchronous belt connecting the driving wheel and the driven wheel;

[0024] Each of the counterweight rings is provided with a driving wheel protruding outward, and the driving wheel of the inner counterweight ring has a smaller diameter than that of the outer counterweight ring and is further away from the mounting plate;

[0025] The driven wheel near the counterweight ring has a smaller diameter and is farther away from the mounting plate than the driven wheel far from the counterweight ring, and the driving wheel of the inner counterweight ring is connected to the driven wheel near the counterweight ring through the synchronous belt.

[0026] The beneficial effect of the present invention is that, through the above-mentioned arrangement, after the reducer is installed on the mounting plate, the motor connected to the reducer is energized and controlled, so that the load test can be carried out in cooperation with the innermost counterweight ring after the driving shaft rotates. When the load needs to be increased, it is only necessary to control the output end of the active telescopic mechanism on the adjacent outer counterweight ring to extend to complete the docking of the two adjacent counterweight rings. When the load needs to be reduced, it is only necessary to control the output end of the active telescopic mechanism on the adjacent outer counterweight ring to retract to complete the separation of the two adjacent counterweight rings. The operations of increasing and reducing the load are easy to control, and the load can be increased and decreased gradually, and the load can also be increased suddenly. The entire test mode is diverse and the control is convenient and quick. In addition, since the multiple counterweight rings rotate concentrically, the load is balanced relative to the reducer shaft and will not cause damage to the reducer. The multiple counterweight rings are rotatably arranged on the mounting plate, which can reduce the interference of the gravity of the counterweight ring on the load accuracy control and improve the load test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 It is a schematic diagram of the structure from a first angle of the present invention;

[0028] Attached Figure 2 It is a schematic diagram of the structure from a second angle of the present invention;

[0029] Attached Figure 3 It is a front view of the present invention;

[0030] Attached Figure 4 It is a first angle exploded schematic diagram of the present invention, showing only the installation method of the innermost mating ring and the mounting plate;

[0031] Attached Figure 5 It is a second angle exploded schematic diagram of the present invention, showing only the installation method of the innermost mating ring and the mounting plate;

[0032] Attached Figure 6 It is a side cross-sectional view of the present invention, showing only the installation method of the innermost mating ring and the mounting plate;

[0033] Attached Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0034] Attached Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0035] Attached Fig. 9It is a schematic diagram of the structure of the counterweight ring in the present invention;

[0036] Attached Fig.10 for Fig. 9 A partial enlarged view of point C in the middle;

[0037] Attached Fig.11 is a front cross-sectional view of the counterweight ring of the present invention;

[0038] Attached Fig.12 It is a schematic diagram of the extended state of the active telescopic mechanism in the present invention;

[0039] Attached Fig.13 It is a schematic diagram of the retracted state of the active telescopic mechanism in the present invention;

[0040] Attached Fig.14 It is a schematic diagram of the structure of the present invention when a damper is provided;

[0041] Attached Fig.15 This is a front view of the present invention with a damper;

[0042] Attached Fig.16 For attachment Fig.15 Front section view of DD.

[0043] In the figure, 1-mounting plate; 11-annular mounting groove; 111-first limiting convex ring; 12-blocking ring; 13-mounting cavity; 14-bracket; 15-rotating shaft mounting hole; 2-counterweight ring; 21-mounting groove; 22-connecting groove; 23-matching ring; 231-second limiting convex ring; 232-third limiting convex; 3-active telescopic mechanism; 31-block; 311-sliding cavity; 312-telescopic hole; 313-guide hole; 32-telescopic member; 321-telescopic rod; 322-spring limiting disk; 323-iron ring; 33-spring; 34-electromagnet; 4-reducer; 41-rotating shaft; 411-keyway; 5-bearing; 6-thrust ball bearing; 7-motor; 8-damping mechanism; 81-damper; 82-driven wheel; 83-driving wheel; 84-synchronous belt. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] As attached Figure 1-16 As shown, the present invention provides a speed reducer testing device, comprising a mounting plate 1 and a plurality of weight rings 2 rotatably arranged on the mounting plate 1, wherein the plurality of weight rings 2 are arranged concentrically in descending order in size;

[0050] The mounting plate 1 is provided with a shaft mounting hole 15, which is arranged inside the innermost counterweight ring 2 and is concentric with the counterweight ring 2;

[0051] The inner wall of the counterweight ring 2 is provided with a mounting groove 21 in the radial direction, and an active telescopic mechanism 3 is provided in the mounting groove 21. The output end of the active telescopic mechanism 3 has a moving stroke of extending and retracting the inner wall of the counterweight ring 2;

[0052] The outer wall of the counterweight ring 2 is radially provided with a connecting groove 22. The active telescopic mechanism 3 on the innermost counterweight ring 2 is used to cooperate with the key groove 411 of the rotating shaft 41 of the reducer 4 to be tested, and the active telescopic mechanism 3 on the outer counterweight ring 2 is used to cooperate with the connecting groove 22 on the inner counterweight ring 2.

[0053] It should be noted that the input end of the reducer 4 is connected to a rotation driving device, such as a motor 7 or an internal combustion engine.

[0054] Through the above-mentioned arrangement, the present invention, after the reducer 4 is installed on the mounting plate 1, the motor 7 connected to the reducer 4 is energized and controlled, so that the load test can be carried out in cooperation with the innermost counterweight ring 2 after the driving shaft 41 is rotated. When the load needs to be increased, it is only necessary to control the output end of the active telescopic mechanism 3 on the adjacent outer counterweight ring 2 to extend to complete the docking of the two adjacent counterweight rings 2. When the load needs to be reduced, it is only necessary to control the output end of the active telescopic mechanism 3 on the adjacent outer counterweight ring 2 to retract to complete the separation of the two adjacent counterweight rings 2. The operations of increasing and reducing the load are easy to control, and the load can be increased (connected to the outside in sequence) and decreased (separated to the inside in sequence). It is possible to achieve a sudden increase in load (first connect several outer counterweight rings to each other. Since multiple counterweight rings are in an interconnected position after each test, it is easy to connect several counterweight rings to each other; then connect the inner counterweight ring connected to the rotating shaft) and a sudden decrease in load (directly separate the innermost counterweight ring from its outer counterweight ring to separate multiple outer counterweight rings at a time). The entire test mode is diverse and the control is convenient and fast. In addition, since the multiple counterweight rings 2 rotate concentrically, the load balances the force on the rotating shaft 41 of the reducer 4 and will not cause damage to the reducer 4. Multiple counterweight rings 2 are rotatably arranged on the mounting plate 1, which can reduce the interference of the gravity of the counterweight ring 2 on the load accuracy control and improve the load test accuracy.

[0055] In one embodiment, reference Fig.12 and Fig.13 The active telescopic mechanism 3 includes a block 31, a telescopic member 32, a spring 33 and an electromagnet 34;

[0056] The block 31 is provided with a sliding cavity 311, a telescopic hole 312 connected to one end of the sliding cavity 311, and a guide hole 313 located at the other end of the sliding cavity 311;

[0057] The telescopic member 32 includes a telescopic rod 321 and a spring limiting plate 322 disposed on the telescopic rod 321. The two ends of the telescopic rod 321 are respectively slidably fitted in the telescopic hole 312 and the guide hole 313. The spring limiting plate 322 is slidably fitted in the sliding cavity 311.

[0058] The spring 33 is sleeved on the sub-telescopic rod 321, and one end of the spring 33 abuts against the spring limit plate 322, and the other end abuts against the end surface of the sliding cavity 311;

[0059] The electromagnet 34 is disposed on the end surface of the sliding cavity 311 , and the electromagnet 34 is magnetically engaged with the spring limiting disk 322 .

[0060] In this embodiment, the extension process of the active telescopic mechanism 3 is to drive the telescopic rod 321 to extend through the reset force of the spring 33, and the retraction process of the active telescopic mechanism 3 is to drive the telescopic rod 321 to quickly reset through the electromagnet 34 adsorbing the spring limit plate 322, so that when the outer counterweight ring 2 is connected to the inner counterweight ring 2, the electromagnet 34 can be controlled to be powered off at any angle of the two counterweight rings 2, and when the inner counterweight ring 2 is transferred to the active telescopic mechanism 3 position of the outer counterweight ring 2, the telescopic rod 321 of the active telescopic mechanism 3 is extended and inserted into the connection groove 22 of the inner counterweight ring 2 to complete the connection, and when the outer counterweight ring 2 is separated from the inner counterweight ring 2, the electromagnet 34 can be controlled to be powered on at any time, driving the spring limit plate 322 to drive the telescopic rod 321 to move and retract, and quickly achieve separation. That is, in this embodiment, the connection and separation of two adjacent counterweight rings 2 can be reduced, the operation difficulty can be simplified, and the test efficiency can be improved. In addition, in this embodiment, when the reducer 4 is installed, the rotating shaft 41 does not need to be deliberately connected to the innermost counterweight ring 2, which can reduce the difficulty of installing the reducer 4.

[0061] In one embodiment, the electromagnet 34 is a ring-shaped electromagnet, and the electromagnet 34 is arranged in contact with the inner wall of the sliding cavity 311, and the outer wall of the spring limit plate 322 protrudes toward the electromagnet 34 and is provided with an iron ring 323. Fig.13 In this embodiment, after the electromagnet 34 and the iron ring 323 cooperate, the two ends of the spring 33 still have a certain distance and will not be completely compressed, thereby improving the adsorption stability and reliability of the spring 33.

[0062] In one of the embodiments, a plurality of connecting grooves 22 and active telescopic mechanisms 3 are arranged in a ring array on each of the counterweight rings 2 to improve the connection stability between two adjacent counterweight rings 2. A photoelectric sensor is provided on the output end of each active telescopic mechanism 3. In this embodiment, the photoelectric sensor can be used to detect the rotation speed and angle of the inner counterweight ring 2, and can assist in testing the rotation accuracy of the reducer.

[0063] In one embodiment, the mounting plate 1 is provided with an annular mounting groove 11, and the counterweight ring 2 is provided with a matching ring 23;

[0064] A bearing 5 is provided between the outer wall of the matching ring 23 and the inner wall of the annular mounting groove 11. In this embodiment, the matching ring 23 is rotatably connected to the mounting plate 1 through the bearing 5, which can reduce the interference of the rotational friction of the counterweight ring 2 on the load precision control, and further improve the load test precision. It should be noted that the number of the annular mounting groove 11, the matching ring 23 and its related structures is consistent with the number of the counterweight ring 2, that is, each counterweight ring 2 is rotatably matched with an annular mounting groove 11 through a matching ring 23. In order to make the drawings clearer, only the innermost annular mounting groove 11 and the matching ring 23 on the innermost counterweight ring are shown in the figure.

[0065] In one embodiment, a first limiting protrusion 111 is provided on the inner wall of the annular mounting groove 11 toward the outer ring of the bearing 5, and a second limiting protrusion 231 is provided on the outer wall of the matching ring 23 toward the inner ring of the bearing 5. In this embodiment, the installation stability of the bearing 5 can be improved.

[0066] In one of the embodiments, a retaining ring 12 is arranged in the annular mounting groove 11 between the first limiting protrusion 111 and the bottom of the groove, and a mounting cavity 13 is formed between the retaining ring 12 and the bottom of the annular mounting groove 11. A third limiting protrusion 232 is provided at the end of the mating ring 23 protruding toward the mounting cavity 13, and a thrust ball bearing 6 is arranged between the third limiting protrusion 232 and the retaining ring 12. In this embodiment, the axial movement of the counterweight ring 2 can be avoided, thereby improving the stability of the counterweight ring 2.

[0067] In one of the embodiments, a bracket 14 is provided at the bottom of the mounting plate 1 to facilitate fixing the mounting plate 1 and the counterweight ring 2 .

[0068] In one of the embodiments, chamfers are provided on both sides of the connection groove 22 , which can reduce the difficulty of inserting the output end of the active telescopic mechanism 3 into the connection groove 22 .

[0069] In one embodiment, referring to the attached Fig.14 -Attached Fig.16 The reducer test device further includes a plurality of damping mechanisms 8, the number of which is consistent with the number of the counterweight rings 2, that is, one damping mechanism 8 is correspondingly connected to one counterweight ring 2, so that the counterweight ring 2 not only has its own mass, but can also be connected to the damping mechanism 8 for further improvement and accurate damping liability testing. In this embodiment, the load test of the reducer 4 is mainly performed through the damping mechanism 8;

[0070] The damping mechanism 8 includes a damper 81, a driven wheel 82 arranged on the output end of the damper 81, a driving wheel 83 arranged on the counterweight ring 2, and a synchronous belt 84 connecting the driving wheel 83 and the driven wheel 82, wherein the torsional damping coefficients of the multiple dampers 81 may be consistent or inconsistent, and the torsional damping coefficient may be adjustable or fixed;

[0071] Each of the counterweight rings 2 is provided with a driving wheel 83 protruding outwards, and the driving wheel 83 of the counterweight ring 2 located on the inner side has a smaller diameter than the driving wheel 83 of the counterweight ring 2 located on the outer side and is further away from the mounting plate 1;

[0072] The driven wheel 82 on the side close to the counterweight ring 2 has a smaller diameter and is farther away from the mounting plate 1 than that on the side far from the counterweight ring 2, and the driving wheel 83 of the inner counterweight ring 2 is connected to the driven wheel 82 on the side close to the counterweight ring 2 through the synchronous belt 84, that is, the smallest counterweight ring 2 and the driven wheel 82 closest to the side of the counterweight ring 2 pass through the synchronous belt 84, the second smallest counterweight ring 2 and the driven wheel 82 second closest to the side of the counterweight ring 2 pass through the synchronous belt 84, and so on. At this time, multiple synchronous belts 84 can be connected in the form of loops without interfering with each other.

[0073] In this embodiment, multiple counterweight rings 2 can be connected and separated to achieve combined testing of multiple dampers 81, and then corresponding tests of different rotational damping coefficients under different reduction ratios of the reducer 4 can be performed to improve the test accuracy. At the same time, load increase, decrease, sudden increase and sudden decrease tests can also be performed.

[0074] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A reducer testing device, characterized in that: It comprises a mounting plate (1) and a plurality of counterweight rings (2) rotatably arranged on the mounting plate (1), wherein the plurality of counterweight rings (2) are arranged concentrically in descending order of size; The mounting plate (1) is provided with a rotating shaft mounting hole (15), the rotating shaft mounting hole (15) being arranged inside the innermost counterweight ring (2) and being arranged concentrically with the counterweight ring (2); The inner wall of the counterweight ring (2) is provided with a mounting groove (21) in the radial direction, an active telescopic mechanism (3) is provided in the mounting groove (21), and the output end of the active telescopic mechanism (3) has a moving stroke for extending and retracting the inner wall of the counterweight ring (2); The outer wall of the counterweight ring (2) is provided with a connecting groove (22) in the radial direction; the active telescopic mechanism (3) on the innermost counterweight ring (2) is used to cooperate with the keyway (411) of the rotating shaft (41) of the reducer (4) to be tested; and the active telescopic mechanism (3) on the outer counterweight ring (2) is used to cooperate with the connecting groove (22) on the inner counterweight ring (2).

2. The reducer testing device according to claim 1, characterized in that: The active telescopic mechanism (3) comprises a block (31), a telescopic member (32), a spring (33) and an electromagnet (34); The block (31) is provided with a sliding cavity (311), a telescopic hole (312) connected to one end of the sliding cavity (311), and a guide hole (313) located at the other end of the sliding cavity (311); The telescopic member (32) comprises a telescopic rod (321) and a spring limiting plate (322) arranged on the telescopic rod (321); two ends of the telescopic rod (321) are respectively slidably fitted in the telescopic hole (312) and the guide hole (313); and the spring limiting plate (322) is slidably fitted in the sliding cavity (311); The spring (33) is sleeved on the sub-telescopic rod (321), with one end abutting against the spring limiting plate (322) and the other end abutting against the end surface of the sliding cavity (311); The electromagnet (34) is arranged on the end surface of the sliding cavity (311), and the electromagnet (34) is magnetically matched with the spring limiting disk (322).

3. The reducer testing device according to claim 2, characterized in that: The electromagnet (34) is a ring-shaped electromagnet, and the electromagnet (34) is arranged in contact with the inner wall of the sliding cavity (311). The outer wall of the spring limiting disk (322) is provided with an iron ring (323) protruding toward the electromagnet (34).

4. The reducer testing device according to claim 3, characterized in that: A plurality of connecting grooves (22) and active telescopic mechanisms (3) are arranged in a ring array on each counterweight ring (2), and a photoelectric sensor is arranged on the output end of each active telescopic mechanism (3).

5. The reducer testing device according to any one of claims 1 to 4, characterized in that: The mounting plate (1) is provided with an annular mounting groove (11), and the counterweight ring (2) is provided with a matching ring (23); A bearing (5) is arranged between the outer wall of the matching ring (23) and the inner wall of the annular mounting groove (11).

6. The reducer testing device according to claim 5, characterized in that: A first limiting convex ring (111) is provided on the inner wall of the annular mounting groove (11) facing the outer ring of the bearing (5), and a second limiting convex ring (231) is provided on the outer wall of the matching ring (23) facing the inner ring of the bearing (5).

7. The reducer testing device according to claim 6, characterized in that: A retaining ring (12) is arranged in the annular mounting groove (11) between the first limiting protrusion (111) and the groove bottom, a mounting cavity (13) is formed between the retaining ring (12) and the groove bottom of the annular mounting groove (11), a third limiting protrusion (232) is arranged at the end of the matching ring (23) protruding toward the mounting cavity (13), and a thrust ball bearing (6) is arranged between the third limiting protrusion (232) and the retaining ring (12).

8. The reducer testing device according to claim 1, characterized in that: A bracket (14) is provided at the bottom of the mounting plate (1).

9. The reducer testing device according to claim 1, characterized in that: Chamfers are arranged on both sides of the connection groove (22).

10. The reducer testing device according to any one of claims 1-4 and 6-9, characterized in that: It also includes a plurality of damping mechanisms (8), the number of the damping mechanisms (8) being the same as the number of the counterweight rings (2); The damping mechanism (8) comprises a damper (81), a driven wheel (82) arranged on the output end of the damper (81), a driving wheel (83) arranged on the counterweight ring (2), and a synchronous belt (84) connecting the driving wheel (83) and the driven wheel (82); Each of the counterweight rings (2) is provided with a driving wheel (83) protruding outward, and the driving wheel (83) of the counterweight ring (2) located on the inner side has a smaller diameter than the driving wheel (83) of the counterweight ring (2) located on the outer side and is further away from the mounting plate (1); The driven wheel (82) on the side close to the counterweight ring (2) has a smaller diameter and is further away from the mounting plate (1) than the driven wheel (82) on the side far from the counterweight ring (2), and the driving wheel (83) of the inner counterweight ring (2) is connected to the driven wheel (82) on the side close to the counterweight ring (2) via the synchronous belt (84).

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