A reducer testing device

Abstract

The present invention belongs to the field of reducer testing, and specifically relates to a reducer testing device, comprising a mounting plate and a plurality of counterweight rings rotatably arranged on the mounting plate, the sizes of the plurality of counterweight rings being arranged concentrically in sequence from large to small; a rotating shaft mounting hole is provided on the mounting plate, the rotating shaft mounting hole is provided in a position inside the innermost counterweight ring, and is arranged concentrically with the counterweight ring; an active telescopic mechanism is provided radially on the inner wall of the counterweight ring; a connecting groove is provided radially on the outer wall of the counterweight ring; through the above-mentioned arrangement, the present invention can energize and control the motor connected to the reducer after the reducer is installed on the mounting plate, and can cooperate with the innermost counterweight ring to perform load testing after the driving shaft rotates, and the operations of increasing and reducing the load are easy to control, and can realize gradual increase and decrease of the load, as well as sudden increase and decrease of the load.

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] A reducer is a relatively sophisticated machine that matches speed and transmits torque between the prime mover and the working machine or actuator. Its purpose is to reduce speed and increase torque. Therefore, the reducer's load capacity and rotational accuracy are crucial. Existing reducer load testing platforms are cumbersome to increase and decrease loads, requiring manual adjustment of load size and type, making the testing process inefficient. Furthermore, the complexity of interfacing the reducer with the reducer load testing platform requires specialized personnel for operation and commissioning, increasing the difficulty and cost of testing.

[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 counterweight rings rotatably arranged on the mounting plate, wherein the plurality of counterweight 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 provided with a connecting groove along the radial direction. 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 includes 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 includes a telescopic rod and a spring limiting plate provided on the telescopic rod, wherein both 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, with one end abutting against the spring limit plate and the other end abutting 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 engaged with the spring limiting disk.

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

[0015] Furthermore, each of the counterweight rings has a plurality of connecting grooves and active telescopic mechanisms arranged in a ring array, and each active telescopic mechanism has an output end provided with a photoelectric sensor.

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

[0020] Furthermore, a bracket is provided 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 the same as the number of the counterweight rings;

[0023] The damping mechanism includes 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 on the side close to the counterweight ring has a smaller diameter than that away from the counterweight ring and is farther away from the mounting plate, and the driving wheel of the inner counterweight ring is connected to the driven wheel on the side close to 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 precision control and improve the load test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attachment Figure 1 This is a schematic structural diagram of the present invention from a first angle;

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

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

[0030] Attachment Figure 4 This is a first-angle exploded view of the present invention, showing only the installation method of the innermost mating ring and the mounting plate;

[0031] Attachment Figure 5 This is a second exploded view of the present invention, showing only the installation of the innermost mating ring and the mounting plate;

[0032] Attachment 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] Attachment Figure 7 for Figure 6 A partial enlarged view of point A in the middle;

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

[0035] Attachment Figure 9Schematic diagram of the structure of the counterweight ring in the present invention;

[0036] Attachment Figure 10 for Figure 9 A partial enlarged view of point C in the middle;

[0037] Attachment Figure 11 It is a front cross-sectional view of the counterweight ring in the present invention;

[0038] Attachment Figure 12 Schematic diagram of the active telescopic mechanism of the present invention in the extended state;

[0039] Attachment Figure 13 Schematic diagram of the retracted state of the active telescopic mechanism of the present invention;

[0040] Attachment Figure 14 This is a schematic diagram of the structure of the present invention when a damper is provided;

[0041] Attachment Figure 15 This is a front view of the present invention with a damper;

[0042] Attachment Figure 16 For attachment Figure 15 Front cross-sectional view of DD.

[0043] In the figure, 1-mounting plate; 11-annular mounting groove; 111-first limiting protrusion; 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 protrusion; 232-third limiting protrusion; 3-active telescopic mechanism; 31-block; 311-sliding cavity; 312-telescopic hole; 313-guide hole; 32-telescopic member; 321-telescopic rod; 322-spring limiting plate; 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall 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 various 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, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0047] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection, electrical connection, physical connection, or wireless communication connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, 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 this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a 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 reducer testing device, comprising 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;

[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 provided with a connecting groove 22 along the radial direction. 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 drive 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, and 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 turn) and decreased (separated to the inside in turn). 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 the 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 multiple counterweight rings 2 rotate concentrically, the load causes the rotating shaft 41 of the reducer 4 to be subjected to balanced force, 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 Figure 12 and Figure 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 communicating with 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 provided on the telescopic rod 321. The 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 telescopic rod 321, with one end abutting against the spring limit plate 322 and the other end abutting 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 achieved by the return force of the spring 33, which drives the telescopic rod 321 to extend. The retraction process of the active telescopic mechanism 3 is achieved by the electromagnet 34 attracting the spring limit plate 322, which drives the telescopic rod 321 to quickly return to its original position. Therefore, when connecting the outer counterweight ring 2 to the inner counterweight ring 2, the electromagnet 34 can be de-energized at any angle between the two counterweight rings 2. When the inner counterweight ring 2 rotates to the active telescopic mechanism 3 position of the outer counterweight ring 2, the telescopic rod 321 of the active telescopic mechanism 3 extends and inserts into the connecting groove 22 of the inner counterweight ring 2, completing the connection. When separating the outer counterweight ring 2 from the inner counterweight ring 2, the electromagnet 34 can be energized at any time, driving the spring limit plate 322 to move and retract the telescopic rod 321, quickly achieving separation. In other words, this embodiment simplifies the connection and separation of two adjacent counterweight rings 2, simplifies the operation, and improves testing efficiency. 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. The outer wall of the spring limit plate 322 is provided with an iron ring 323 protruding toward the electromagnet 34. Figure 13 In this embodiment, after the electromagnet 34 and the iron ring 323 cooperate, there is still a certain distance between the two ends of the spring 33 and it will not be completely compressed, thereby improving the adsorption stability and reliability of the spring 33.

[0062] In one embodiment, multiple groups of connecting grooves 22 and active telescopic mechanisms 3 are arranged in a ring array on each counterweight ring 2 to improve the connection stability of 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, which can assist in the reducer rotation accuracy test.

[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 disposed between the outer wall of the mating ring 23 and the inner wall of the annular mounting groove 11. In this embodiment, the mating ring 23 is rotatably connected to the mounting plate 1 via the bearing 5, thereby reducing the interference of the rotational friction of the counterweight ring 2 on load precision control and further improving load testing accuracy. It should be noted that the number of annular mounting grooves 11, mating rings 23, and their associated structures is the same as the number of counterweight rings 2, i.e., each counterweight ring 2 is rotatably mated to a single annular mounting groove 11 via a mating ring 23. To enhance clarity, the figure only shows the innermost annular mounting groove 11 and the mating ring 23 on the innermost counterweight ring.

[0065] In one embodiment, a first limiting protrusion 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 protrusion 231 is provided on the outer wall of the mating ring 23 facing the inner ring of the bearing 5. In this embodiment, the installation stability of the bearing 5 can be improved.

[0066] In one embodiment, a retaining ring 12 is provided 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. The end of the mating ring 23 is provided with a third limiting protrusion 232 protruding toward the mounting cavity 13, and a thrust ball bearing 6 is provided 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 embodiment, 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 embodiment, 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, refer to the attached Figure 14 -Attached Figure 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 improved 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 pulley 82 provided on the output end of the damper 81, a driving pulley 83 provided on the counterweight ring 2, and a synchronous belt 84 connecting the driving pulley 83 and the driven pulley 82. The torsional damping coefficients of the multiple dampers 81 may be consistent or inconsistent, and the torsional damping coefficients may be adjustable or fixed.

[0071] Each of the counterweight rings 2 is provided with a driving wheel 83 protruding outward. The driving wheel 83 of the inner counterweight ring 2 has a smaller diameter than that of the outer counterweight ring 2 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 than that on the side far from the counterweight ring 2 and is farther away from the mounting plate 1, 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, by connecting and separating multiple counterweight rings 2, a combination test of multiple dampers 81 can be achieved, and 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), and the rotating shaft mounting hole (15) is arranged inside the innermost counterweight ring (2) and is concentric 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); 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) communicating with 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 disk (322) provided on the telescopic rod (321); both ends of the telescopic rod (321) are slidably fitted in the telescopic hole (312) and the guide hole (313), respectively; and the spring limiting disk (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 engaged with the spring limiting disk (322).

2. The reducer testing device according to claim 1, wherein: 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 plate (322) is provided with an iron ring (323) protruding toward the electromagnet (34).

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

4. The reducer testing device according to any one of claims 1 to 3, 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 provided between the outer wall of the matching ring (23) and the inner wall of the annular mounting groove (11).

5. The reducer testing device according to claim 4, 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).

6. The reducer testing device according to claim 5, characterized in that: A retaining ring (12) is provided in the annular mounting groove (11) between the first limiting protrusion (111) and the groove bottom, and a mounting cavity (13) is formed between the retaining ring (12) and the groove bottom of the annular mounting groove (11). The end of the matching ring (23) is provided with a third limiting protrusion (232) protruding toward the mounting cavity (13), and a thrust ball bearing (6) is provided between the third limiting protrusion (232) and the retaining ring (12).

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

8. The reducer testing device according to claim 1, wherein: Chamfers are provided on both sides of the connecting groove (22).

9. The reducer testing device according to any one of claims 1-3, 5-6, characterized in that: It also includes a plurality of damping mechanisms (8), the number of the damping mechanisms (8) being consistent with the number of the counterweight rings (2); 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); Each counterweight ring (2) is provided with a driving wheel (83) protruding outward, and the driving wheel (83) of the inner counterweight ring (2) has a smaller diameter than the driving wheel (83) of the outer counterweight ring (2) 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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