A performance testing device for a hydraulic motor reducer assembly

Abstract

The present invention relates to the technical field of reducer performance testing. Specifically, it relates to a performance testing device for a hydraulic motor reducer assembly, which includes a test bench. On the top surface of the test bench, a hydraulic motor, a reducer, and a torque sensor are fixedly installed in sequence from front to back. The rear end of the torque sensor is connected to a uniform load component for loading through a connecting component. On the right side of the connecting component, there is an instantaneous load component for adding an instantaneous load. The connecting component includes a coupling coaxially connected to the torque sensor at the front end, a connecting cylinder structure coaxially connected to the rear end of the coupling at the front end, and a lever fixed on the outer wall of the connecting cylinder structure. By setting the instantaneous load component, during detection, an instantaneous load can be given to the reducer, and the situation of the reducer under the instantaneous load can be detected. In addition, by setting the instantaneous load component and the connecting component, the load situation can be changed quickly, and the operation is convenient and simple.

Description

Technical Field

[0001] The present invention belongs to the technical field of reducer performance testing, and specifically relates to a performance testing device for a hydraulic motor reducer assembly. Background Art

[0002] A hydraulic motor reducer assembly is a device that converts hydraulic energy into mechanical energy and reduces the rotational speed and increases the torque through a reducer. Before leaving the factory, it needs to be sampled and tested to ensure its safety.

[0003] For example, a precision reducer acceleration fatigue testing device for robots disclosed in a patent application with publication number CN119223623A in the field of measurement testing technology includes a support platform body and a precision reducer support box. The precision reducer support box is fixedly connected to the upper right end of the support platform body; a precision reducer is installed inside the precision reducer support box, a temperature adjustment mechanism is arranged outside the right end of the support platform body, a load adjustment mechanism is arranged at the right end of the precision reducer, and a moving mechanism is arranged on the upper side of the support platform body.

[0004] Combined with the above case and the actual situation, we found the following problems: When actually detecting the torque of the reducer, a hysteresis brake is usually used to add load. The hysteresis brake changes the added load by changing the current, but generally changes slowly, which is suitable for applying a constant load or a uniformly changing load. However, the reducer also needs to detect instantaneous loads. During the detection, it is necessary to disassemble and reinstall bolts to replace the detection equipment, which is extremely troublesome and has low efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a performance testing device for a hydraulic motor reducer assembly to solve the above problems of the prior art.

[0006] To achieve the above purpose, the present invention provides a performance testing device for a hydraulic motor reducer assembly, including a test bench. A hydraulic motor, a reducer, and a torque sensor are fixedly installed on the top surface of the test bench in sequence from front to back. The rear end of the torque sensor is connected to a uniform load component for loading through a connection component, and an instantaneous load component for adding an instantaneous load is arranged on the right side of the connection component;

[0007] The connection component includes a coupling coaxially connected to the front end of the torque sensor, a connection cylinder structure coaxially connected to the rear end of the front end of the coupling, and a lever fixed on the outer wall of the connection cylinder structure;

[0008] The instantaneous load component includes a transmission structure, a counterweight structure for generating a load, and a rope structure for connecting the transmission structure and the counterweight structure;

[0009] The transmission structure includes a transmission rod and a rotating rod sleeved and rotatably connected to the front end of the transmission rod. The front end of the transmission rod is symmetrically fixed with clamping balls up and down. A sliding cavity for the front and back sliding of the transmission rod is provided in the rotating rod, and two spiral grooves adapted to the clamping balls are provided on the inner cavity wall of the sliding cavity;

[0010] The pulling rope structure includes a rotating plate, a plurality of lever slots regularly arranged on the rotating plate, and a rope winding member coaxially and fixedly connected to the center of the rotating plate. A pulling rope is wound around the rope winding member;

[0011] A load cylinder is provided on the transmission structure, the counterweight structure is arranged in the load cylinder, and the bottom end of the pulling rope passes through the top surface of the load cylinder and is fixedly connected to the counterweight structure.

[0012] In the technical solution of the present invention, the hydraulic motor is coaxially connected to the reducer, and the reducer is coaxially connected to the torque sensor.

[0013] In the technical solution of the present invention, the connecting cylinder structure includes a connecting cylinder coaxially and fixedly connected to the rear end of the coupling at the front end and two reset mechanisms symmetrically arranged up and down in the cylinder wall of the connecting cylinder. A plugging cavity for plugging the uniform load component is provided in the connecting cylinder. The reset mechanism includes a pressing rod, a pin rod arranged on the front side of the pressing rod, and a cross rod horizontally arranged before and after between the pressing rod and the pin rod.

[0014] In the technical solution of the present invention, a pin rod hole adapted to the pin rod is provided on the front side of the cavity wall of the plugging cavity. A spring is provided between the top end of the pin rod and the inner top surface of the corresponding pin rod hole. The pin rod is slidably connected to the corresponding pin rod hole. The top end of the pressing rod passes through the outer cylinder wall of the connecting cylinder. The end faces of both ends of the cross rod are inclined surfaces. The end face of the bottom end of the pressing rod is adapted to the front end face of the cross rod, and the end face of the bottom end of the pin rod and the rear end face of the cross rod are adapted.

[0015] In the technical solution of the present invention, the uniform load component includes a bracket, a hysteresis brake fixed on the bracket for generating a load, and a plugging column connected to the connecting component. The rear end of the plugging column is coaxially and fixedly connected to the rotating shaft of the hysteresis brake. A hydraulic cylinder is fixed in the middle of the rear inner wall of the test bench. The telescopic end of the hydraulic cylinder is fixedly connected to the rear side wall of the bracket. The bracket is slidably connected to the test bench.

[0016] In the technical solution of the present invention, the front end of the plugging column is provided with a conical head in a conical shape. The plugging column is adapted to the size of the plugging cavity. Wings protruding outward are symmetrically fixed on the left and right sides of the plugging column. Plugging holes adapted to the pin rod are symmetrically arranged up and down on the outer wall of the plugging column.

[0017] In the technical solution of the present invention, the transmission rod is L-shaped. One end of the transmission rod is fixed to the right side wall of the bracket, and the other end extends into the sliding cavity and is slidably connected to the sliding cavity. The rotating rod is provided with a first fixing bracket and a second fixing bracket at the front end and the rear end respectively. Both the first fixing bracket and the second fixing bracket are fixedly connected to the test bench. The rotating rod passes through the first fixing bracket and the two are rotatably connected. The rear end of the rotating rod is embedded in the second fixing bracket and the two are rotatably connected.

[0018] In the technical solution of the present invention, the position of the rotating plate corresponds to the position of the shifting rod, the shifting rod groove is adapted to the size of the shifting rod. A fixing rod is fixedly installed on the outer wall of the rotating rod near the front end. A rotating shaft is coaxially fixedly connected between the rotating plate and the rope winding member. The rotating shaft passes through the fixing rod and the two are rotatably connected.

[0019] In the technical solution of the present invention, the counterweight structure includes a mounting block fixedly connected to the bottom end of the pulling rope in the middle of the top surface and a counterweight block arranged below the mounting block. The left and right sides of the mounting block are fixedly provided with limiting blocks. The limiting blocks are slidably connected to the inner wall of the load cylinder. The bottom surface of the mounting block is provided with a first mounting groove. The top surface of the counterweight block is provided with a clamping block adapted to the first mounting groove. The bottom surface of the counterweight block is provided with a second mounting groove adapted to the clamping block.

[0020] In the technical solution of the present invention, the bottom end of the load cylinder is fixedly connected to the outer wall of the rotating rod and the load cylinder is arranged in front of the fixing rod. An opening adapted to the size of the counterweight block is provided on the left side near the bottom end of the load cylinder.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0022] 1. In the present invention, by setting the connection component, during detection, the hydraulic cylinder is started to drive the uniform load component to move forward, and the transmission rod will move forward synchronously. The conical head will first contact the pin rod and under the action of the conical surface, push the two pin rods outwards. At this time, the insertion column will move forward without being blocked. When the insertion hole moves to a position corresponding to the pin rod, the pin rod will spring into the insertion hole under the action of the spring to complete the locking. When switching the detection load, only need to press the pressure lever to make the cross bar slide forward, thereby pushing the pin rod up to return to the pin rod hole. At this time, the connection between the pin rod and the uniform load component can be released, realizing rapid load switching, and the operation is simple and convenient.

[0023] 2. In the present invention, by providing an instantaneous load component, after the pin rod and the uniform load component are disconnected, the hydraulic motor is restarted to drive the reducer and the lever to rotate. When the lever rotates to the lever groove, it will drive the rotating plate to rotate, and then drive the subsequent rotating shaft to drive the rope winding member to rotate to pull the pull rope upward. The upward moving pull rope will pull the counterweight, achieving the effect of suddenly being subjected to a load. When the lever leaves the lever groove, the load will be cancelled, thus realizing the instantaneous load effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is a schematic diagram of the connection component in the present invention;

[0026] Figure 3 is a cross-sectional view of the connection component in the present invention;

[0027] Figure 4 For the present invention Figure 3 is an enlarged view of part A in the present invention;

[0028] Figure 5 is a schematic diagram of the instantaneous load component in the present invention;

[0029] Figure 6 is a schematic diagram of the linkage structure in the present invention;

[0030] Figure 7 is a cross-sectional view of the rotating rod in the present invention;

[0031] Figure 8 is an exploded view of the pull rope structure in the present invention;

[0032] Figure 9 is a cross-sectional view of the load bucket in the present invention;

[0033] Figure 10 is an exploded view of the counterweight structure in the present invention;

[0034] Description of the reference numerals:

[0035] 1. Test bench;

[0036] 2. Hydraulic motor;

[0037] 3. Reducer;

[0038] 4. Torque sensor;

[0039] 5. Connection component; 51. Coupling; 52. Connection cylinder structure; 521. Connection cylinder; 522. Insertion cavity; 523. Reset mechanism; 5231. Pressing rod; 5232. Cross bar; 5233. Pin rod; 524. Pin rod hole; 525. Spring; 53. Lever;

[0040] 6. Uniform load component; 61. Hysteresis brake; 62. Plug post; 621. Tapered head; 622. Plug hole; 623. Flange; 63. Bracket;

[0041] 7. Hydraulic cylinder;

[0042] 8. Instantaneous load component; 81. Transmission structure; 811. Transmission rod; 812. Rotating rod; 813. Ball; 814. Slide cavity; 815. Spiral groove; 82. First fixing frame; 83. Cable pulling structure; 831. Rotating plate; 832. Lever slot; 833. Fixed rod; 834. Rotating shaft; 835. Cable winding member; 836. Cable; 84. Second fixing frame; 85. Load cylinder; 851. Opening; 86. Counterweight structure; 861. Mounting block; 862. Limit block; 863. First mounting groove; 864. Counterweight; 865. Block; 866. Second mounting groove. Specific embodiments

[0043] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0044] Unless otherwise clearly stated, throughout the specification, the term "comprising" or its variations such as "including" or "having" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0045] Refer to Figures 1 - 10 As shown, this embodiment provides a technical solution:

[0046] The performance testing device for the hydraulic motor reducer assembly in the present invention includes a test bench 1. On the top surface of the test bench 1, a hydraulic motor 2, a reducer 3, and a torque sensor 4 are fixedly installed in sequence from front to back. The hydraulic motor 2 is coaxially connected to the reducer 3, and the reducer 3 is coaxially connected to the torque sensor 4. By setting the torque sensor 4 to monitor the torque received by the reducer 3 during testing, this is the prior art in this field, and the specific principle will not be elaborated here. The rear end of the torque sensor 4 is connected to a uniform load component 6 for loading through a connection component 5. On the right side of the connection component 5, there is an instantaneous load component 8 for adding instantaneous load. By setting the uniform load component 6, the situation where the reducer 3 continuously receives the same load is detected. By setting the instantaneous load component 8, the situation where the reducer 3 receives an instantaneous load and the load suddenly increases is detected;

[0047] The connecting component 5 includes a coupling 51 with its front end coaxially connected to the torque sensor 4, a connecting cylinder structure 52 with its front end coaxially connected to the rear end of the coupling 51, and a lever 53 fixed on the outer wall of the connecting cylinder structure 52. By providing the connecting component 5, it is convenient to connect the uniform load component 6 and switch between the instantaneous load component 8 and the uniform load component 6;

[0048] The instantaneous load component 8 includes a transmission structure 81, a counterweight structure 86 for generating a load, and a cable structure 83 for connecting the transmission structure 81 and the counterweight structure 86;

[0049] The transmission structure 81 includes a transmission rod 811 and a rotating rod 812 rotatably sleeved on the front end of the transmission rod 811. The front end of the transmission rod 811 is symmetrically fixed with clamping balls 813 up and down. The rotating rod 812 is provided with a sliding cavity 814 for the front and back sliding of the transmission rod 811. The inner cavity wall of the sliding cavity 814 is provided with two spiral grooves 815 adapted to the clamping balls 813. When the transmission rod 811 moves backward, the clamping balls 813 will drive the rotating rod 812 to rotate clockwise through the spiral grooves 815, thereby driving the entire instantaneous load component 8 to rotate clockwise and disengage from the connecting component 5, realizing the switching of the instantaneous load component 8 to the uniform load component 6. It should be noted that the spiral direction of the spiral groove 815 is counterclockwise spiral;

[0050] The cable structure 83 includes a rotating plate 831, a number of lever grooves 832 regularly arranged on the rotating plate 831, and a cable winding member 835 coaxially and fixedly connected to the center of the rotating plate 831. A cable 836 is wound around the cable winding member 835;

[0051] A load cylinder 85 is provided on the transmission structure 81. The counterweight structure 86 is arranged in the load cylinder 85. The bottom end of the cable 836 passes through the top surface of the load cylinder 85 and is fixedly connected to the counterweight structure 86. During the rotation of the rotating plate 831, the counterweight structure 86 is pulled through the cable 836 to exert an instantaneous load on the reducer 3.

[0052] Among them, as Figures 1 - 4 shown, the connecting cylinder structure 52 includes a connecting cylinder 521 with its front end coaxially fixed to the rear end of the coupling 51 and two reset mechanisms 523 symmetrically arranged up and down in the cylinder wall of the connecting cylinder 521. The connecting cylinder 521 is provided with a plugging cavity 522 for plugging with the uniform load component 6. The reset mechanism 523 includes a pressure rod 5231, a pin rod 5233 arranged on the front side of the pressure rod 5231, and a cross bar 5232 horizontally arranged before and after between the pressure rod 5231 and the pin rod 5233. The cross bar 5232 can slide back and forth in the connecting cylinder 521. When not detected, the bottom end of the pin rod 5233 penetrates inward through the cavity wall of the plugging cavity 522;

[0053] Further, a pin hole 524 adapted to the pin rod 5233 is provided on the front side of the cavity wall of the insertion cavity 522. A spring 525 is provided between the top end of the pin rod 5233 and the inner top surface of the corresponding pin hole 524. The pin rod 5233 is slidably connected to the corresponding pin hole 524. The top end of the pressure rod 5231 penetrates through the outer cylinder wall of the connecting cylinder 521. The end faces at both ends of the cross bar 5232 are inclined surfaces. The bottom end face of the pressure rod 5231 is adapted to the front end face of the cross bar 5232. The bottom end face of the pin rod 5233 is adapted to the rear end face of the cross bar 5232. After the detection is completed, the pressure rod 5231 is pressed to make the cross bar 5232 slide forward, thereby pushing the pin rod 5233 upward to return to the pin hole 524. At this time, the connection between the pin rod 5233 and the uniform load component 6 can be released.

[0054] In addition, the uniform load component 6 includes a bracket 63, a hysteresis brake 61 fixed on the bracket 63 for generating a load, and a plug post 62 connected to the connection component 5. The rear end of the plug post 62 is coaxially fixed with the rotating shaft of the hysteresis brake 61. The hysteresis brake 61 is a commonly used detection device in the performance detection of the reducer 3 and is an existing technology in the field, so it will not be elaborated here. A hydraulic cylinder 7 is fixed in the middle of the rear inner wall of the test bench 1. The telescopic end of the hydraulic cylinder 7 is fixed to the rear side wall of the bracket 63. The bracket 63 is slidably connected to the test bench 1. The hydraulic cylinder 7 drives the uniform load component 6 to move back and forth to complete the separation and insertion with the connection component 5.

[0055] Further, a conical head 621 in a conical shape is provided at the front end of the plug post 62. The plug post 62 is adapted to the size of the insertion cavity 522. Flanges 623 protruding outward are symmetrically fixed on the left and right sides of the plug post 62. Plug holes 622 adapted to the pin rods 5233 are symmetrically provided on the upper and lower sides of the outer wall of the plug post 62. When the hydraulic cylinder 7 drives the uniform load component 6 to move forward, the conical head 621 will first contact the pin rods 5233 and, under the action of the conical surface, push the two pin rods 5233 outward. At this time, the plug post 62 moves forward without being blocked. When the plug holes 622 move to a position corresponding to the pin rods 5233, the pin rods 5233 spring into the plug holes 622 under the action of the spring 525 to complete the locking.

[0056] In addition, as Figures 5 - 7As shown, the transmission rod 811 is L-shaped. One end of the transmission rod 811 is fixed to the right side wall of the bracket 63, and the other end extends into the sliding cavity 814 and is slidably connected to the sliding cavity 814. The front end and the rear end of the rotating rod 812 are respectively provided with a first fixing frame 82 and a second fixing frame 84. Both the first fixing frame 82 and the second fixing frame 84 are fixedly connected to the test bench 1. The rotating rod 812 passes through the first fixing frame 82 and the two are rotatably connected. The rear end of the rotating rod 812 is embedded in the second fixing frame 84 and the two are rotatably connected. When the hydraulic cylinder 7 drives the uniform load assembly 6 to move forward, the transmission rod 811 will move forward synchronously, so that the clamping ball 813 moves forward through the spiral groove 815, and drives the rotating rod 812 to rotate clockwise through the spiral groove 815 synchronously.

[0057] Further, the position of the rotating plate 831 corresponds to the position of the dial rod 53, and the size of the dial rod groove 832 is adapted to the size of the dial rod 53. A fixing rod 833 is fixedly installed on the outer wall of the rotating rod 812 near the front end. A rotating shaft 834 is coaxially fixedly connected between the rotating plate 831 and the rope winding member 835. The rotating shaft 834 passes through the fixing rod 833 and the two are rotatably connected. When the rotating rod 812 rotates, it will drive the fixing rod 833 and the load cylinder 85 to rotate clockwise synchronously, and then drive the upper rotating plate 831 to rotate clockwise and separate from the dial rod 53. At this time, the conversion of the instantaneous load assembly 8 to the uniform load assembly 6 can be completed.

[0058] In addition, as Figures 8 - 10 shown, the counterweight structure 86 includes a mounting block 861 whose middle part of the top surface is fixed to the bottom end of the pull rope 836 and a counterweight block 864 arranged below the mounting block 861. Limiting blocks 862 are fixed on the left and right sides of the mounting block 861. The limiting blocks 862 are slidably connected to the inner wall of the load cylinder 85. When performing instantaneous load detection, when the dial rod 53 rotates to the dial rod groove 832, it will drive the rotating plate 831 to rotate, and then drive the subsequent rotating shaft 834 to drive the rope winding member 835 to rotate to pull up the pull rope 836. The upward moving pull rope 836 will pull the counterweight block 864 to increase the load. When the dial rod 53 leaves the dial rod groove 832, the load will be cancelled, thus realizing the effect of instantaneous load;

[0059] Further, a first installation groove 863 is provided on the bottom surface of the mounting block 861, a clamping block 865 adapted to the first installation groove 863 is provided on the top surface of the counterweight block 864, a second installation groove 866 adapted to the clamping block 865 is provided on the bottom surface of the counterweight block 864. The bottom end of the load cylinder 85 is fixedly connected to the outer wall of the rotating rod 812 and the load cylinder 85 is arranged in front of the fixing rod 833. An opening 851 adapted to the size of the counterweight block 864 is provided on the left side near the bottom end of the load cylinder 85. By providing the opening 851, when it is necessary to increase the instantaneous load, the counterweight block 864 is added into the load cylinder 85 through the opening 851, so that the clamping block 865 at the top of the added counterweight block 864 is clamped with the second installation groove 866 at the bottom surface of the previous counterweight block 864.

[0060] The working principle of the performance testing device for the hydraulic motor reducer assembly in the present invention is specifically as follows:

[0061] When performing uniform load detection, start the hydraulic cylinder 7 to drive the uniform load component 6 to move forward. The transmission rod 811 will move forward synchronously. The conical head 621 will first contact the pin rod 5233 and, under the action of the conical surface, push the two pin rods 5233 outwards. At this time, the plug column 62 can move forward without being blocked. When the plug hole 622 moves to a position corresponding to the pin rod 5233, the pin rod 5233 will spring into the plug hole 622 under the action of the spring 525 to complete the locking;

[0062] At the same time, the transmission rod 811 will move forward synchronously, and the clamping ball 813 will drive the rotating rod 812 to rotate clockwise through the spiral groove 815, driving the fixed rod 833 and the load cylinder 85 to rotate clockwise synchronously, and then driving the upper rotating plate 831 to rotate clockwise to separate from the lever 53. At this time, the conversion of the instantaneous load component 8 to the uniform load component 6 can be completed. At this time, the hydraulic motor 2 can be started to perform the performance detection of the reducer 3;

[0063] After the uniform load detection is completed, press the pressure rod 5231 to make the cross bar 5232 slide forward, thereby pushing the pin rod 5233 to move up and back into the pin rod hole 524. At this time, the connection between the pin rod 5233 and the uniform load component 6 can be released. At this time, the hydraulic motor 2 can be restarted to drive the reducer 3 and the lever 53 to rotate. When the lever 53 rotates to the lever groove 832, it will drive the rotating plate 831 to rotate, and then drive the subsequent rotating shaft 834 to drive the rope winding member 835 to rotate to pull up the pull rope 836. The upward moving pull rope 836 will pull the counterweight 864, achieving the effect of suddenly receiving a load. When the lever 53 leaves the lever groove 832, the load will be cancelled, thereby realizing the effect of instantaneous load.

[0064] The foregoing description of the specific exemplary embodiments of the present invention is for the purposes of illustration and exemplification. These descriptions are not intended to limit the invention to the precise forms disclosed, and obviously, many changes and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the invention, as well as various different selections and changes. The scope of the present invention is intended to be defined by the specification and its equivalents.

Claims

1. A performance testing device for a hydraulic motor reducer assembly, comprising a test bench (1), on the top surface of which a hydraulic motor (2), a reducer (3) and a torque sensor (4) are fixedly mounted in sequence from front to back, and characterized in that: The rear end of the torque sensor (4) is connected to a uniform load component (6) for loading via a connecting component (5), and a transient load component (8) for adding a transient load is provided on the right side of the connecting component (5); The connecting assembly (5) comprises a coupling (51) whose front end is coaxially connected to the torque sensor (4), a connecting tube structure (52) whose front end is coaxially connected to the rear end of the coupling (51), and a lever (53) fixed to the outer wall of the connecting tube structure (52); The instantaneous load assembly (8) comprises a transmission structure (81), a counterweight structure (86) for generating a load, and a pull rope structure (83) for connecting the transmission structure (81) and the counterweight structure (86); The transmission structure (81) comprises a rotating rod (812) which is sleeved and rotatably connected to a transmission rod (811) and a front end of the transmission rod (811); a locking ball (813) is symmetrically fixed to the front end of the transmission rod (811) in an upper and lower manner; a sliding cavity (814) for the transmission rod (811) to slide forward and backward is provided in the rotating rod (812); and an inner cavity wall of the sliding cavity (814) is provided with two spiral grooves (815) adapted to the locking ball (813); The rope pulling structure (83) comprises a rotating plate (831), a plurality of lever slots (832) regularly arranged on the rotating plate (831), and a rope collecting member (835) coaxially fixedly connected to the center of the rotating plate (831), wherein a rope pulling member (836) is wound around the rope collecting member (835); The transmission structure (81) is provided with a load cylinder (85), the counterweight structure (86) is arranged in the load cylinder (85), and the bottom end of the pull rope (836) passes through the top surface of the load cylinder (85) and is fixedly connected to the counterweight structure (86); The position of the rotating plate (831) corresponds to the position of the shifting rod (53); the shifting rod slot (832) is adapted to the size of the shifting rod (53); a fixing rod (833) is fixed to the front end of the outer wall of the rotating rod (812); a rotating shaft (834) is coaxially fixedly connected between the rotating plate (831) and the rope collecting member (835); the rotating shaft (834) passes through the fixing rod (833) and the two are rotatably connected; The counterweight structure (86) comprises a mounting block (861) fixed at the middle of the top surface and the bottom end of the pull rope (836), and a counterweight block (864) arranged below the mounting block (861), and limit blocks (862) are fixed on the left and right sides of the mounting block (861), and the limit blocks (862) are slidably connected to the inner wall of the load cylinder (85).

2. The performance testing device of the hydraulic motor reducer assembly according to claim 1, characterized in that: The hydraulic motor (2) is coaxially connected to the reducer (3), and the reducer (3) is coaxially connected to the torque sensor (4).

3. The performance testing device of the hydraulic motor reducer assembly according to claim 1, characterized in that: The connecting tube structure (52) comprises a connecting tube (521) whose front end is coaxially fixed with the rear end of the coupling (51) and two reset mechanisms (523) symmetrically arranged in the wall of the connecting tube (521) from top to bottom. The connecting tube (521) is provided with a plug-in cavity (522) plugged into the load-uniform component (6). The reset mechanism (523) comprises a pressure rod (5231), a pin rod (5233) arranged in front of the pressure rod (5231), and a cross rod (5232) arranged horizontally between the pressure rod (5231) and the pin rod (5233).

4. The performance testing device of the hydraulic motor reducer assembly according to claim 3, characterized in that: A pin hole (524) matched with the pin rod (5233) is provided on the front side of the cavity wall of the plug-in cavity (522); a spring (525) is provided between the top end of the pin rod (5233) and the inner top surface of the corresponding pin hole (524); the pin rod (5233) is slidably connected with the corresponding pin hole (524); the top end of the pressure rod (5231) passes through the outer cylinder wall of the connecting cylinder (521); the end surfaces of both ends of the cross rod (5232) are arranged in inclined surfaces; the bottom end surface of the pressure rod (5231) is matched with the front end surface of the cross rod (5232); and the bottom end surface of the pin rod (5233) is matched with the rear end surface of the cross rod (5232).

5. The performance testing device of the hydraulic motor reducer assembly according to claim 3, characterized in that: The load-uniforming assembly (6) comprises a bracket (63), a hysteresis brake (61) fixed on the bracket (63) for generating a load, and a plug-in column (62) connected to the connecting assembly (5), the rear end of the plug-in column (62) being coaxially fixed to the rotating shaft of the hysteresis brake (61), a hydraulic cylinder (7) being fixed to the middle of the rear inner wall of the test bench (1), the telescopic end of the hydraulic cylinder (7) being fixed to the rear side wall of the bracket (63), and the bracket (63) being slidably connected to the test bench (1).

6. The performance testing device of the hydraulic motor reducer assembly according to claim 5, characterized in that: The front end of the plug-in column (62) is provided with a conical head (621) in a conical shape. The plug-in column (62) is adapted to the size of the plug-in cavity (522). Outwardly protruding flanges (623) are symmetrically fixed on the left and right sides of the plug-in column (62). The outer wall of the plug-in column (62) is symmetrically provided with plug-in holes (622) adapted to the pin rod (5233) on the upper and lower sides.

7. The performance testing device of the hydraulic motor reducer assembly according to claim 6, characterized in that: The transmission rod (811) is L-shaped, one end of the transmission rod (811) is fixed to the right side wall of the bracket (63), and the other end extends into the sliding cavity (814) and is slidably connected to the sliding cavity (814); the first fixing frame (82) and the second fixing frame (84) are respectively provided at the front end and the rear end of the rotating rod (812); the first fixing frame (82) and the second fixing frame (84) are both fixedly connected to the test bench (1); the rotating rod (812) passes through the first fixing frame (82) and the two are rotatably connected; the rear end of the rotating rod (812) is embedded in the second fixing frame (84) and the two are rotatably connected.

8. The performance testing device of the hydraulic motor reducer assembly according to claim 7, characterized in that: The bottom surface of the mounting block (861) is provided with a first mounting groove (863), the top surface of the counterweight block (864) is provided with a clamping block (865) matched with the first mounting groove (863), and the bottom surface of the counterweight block (864) is provided with a second mounting groove (866) matched with the clamping block (865).

9. The performance testing device of the hydraulic motor reducer assembly according to claim 8, characterized in that: The bottom end of the load cylinder (85) is fixed to the outer wall of the rotating rod (812) and the load cylinder (85) is arranged on the front side of the fixed rod (833). The bottom end of the load cylinder (85) is provided with an opening (851) matching the size of the counterweight block (864) on the left side.

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