Performance testing device for hydraulic motor speed reducer assembly

Abstract

The invention relates to the technical field of speed reducer performance testing, in particular to a performance testing device for a hydraulic motor speed reducer assembly, which comprises a test board, and a hydraulic motor, a speed reducer and a torque sensor are sequentially and fixedly mounted on the top surface of the test board from front to back. The rear end of the torque sensor is connected with a uniform load assembly used for loading through arranging a connecting assembly, and the right side of the connecting assembly is provided with an instantaneous load assembly used for adding an instantaneous load. The connecting assembly comprises a coupling whose front end is coaxially connected with the torque sensor, a connecting cylinder structure whose front end is coaxially connected with the rear end of the coupling, and a driving lever fixed on the outer wall of the connecting cylinder structure. According to the testing device, the instantaneous load assembly is arranged, so that an instantaneous load can be given to the speed reducer during detection, and the condition that the speed reducer is subjected to the instantaneous load can be detected; in addition, the instantaneous load assembly and the connecting assembly are arranged, so that the load condition is quickly changed, and the operation is convenient and simple.

Description

Technical Field

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

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

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

[0004] Combining the above cases with actual situations, we found the following problems: When actually testing the torque of the reducer, a hysteresis brake is usually used to add a load. The hysteresis brake changes the added load by changing the current, but the change is generally slow. It is suitable for applying a constant load or a uniformly changing load. However, the reducer also needs to detect the instantaneous load. During the test, the bolts need to be disassembled and reassembled to replace the detection equipment, which is extremely troublesome and inefficient. 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-mentioned problems in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides a performance test device for a hydraulic motor reducer assembly, comprising a test bench, on the top surface of which 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 by setting a connecting component, and a transient load component for adding a transient load is provided on the right side of the connecting component; The connecting assembly includes a coupling whose front end is coaxially connected to the torque sensor, a connecting tube structure whose front end is coaxially connected to the rear end of the coupling, and a lever fixed on the outer wall of the connecting tube structure; The instantaneous load assembly includes a transmission structure, a counterweight structure for generating a load, and a pull rope structure for connecting the transmission structure and the counterweight structure; The transmission structure comprises a rotating rod which is sleeved and rotatably connected to the transmission rod and the front end of the transmission rod, a clamping ball is fixed symmetrically at the front end of the transmission rod, a sliding cavity for the transmission rod to slide forward and backward is provided in the rotating rod, and the inner cavity wall of the sliding cavity is provided with two spiral grooves adapted to the clamping ball; The rope pulling structure comprises a rotating plate, a plurality of lever slots regularly arranged on the rotating plate, and a rope collecting member coaxially fixedly connected to the center of the rotating plate, and a rope is wound around the rope collecting member; The transmission structure is provided with a load cylinder, the counterweight structure is arranged in the load cylinder, and the bottom end of the pull rope passes through the top surface of the load cylinder and is fixedly connected with the counterweight structure.

[0007] 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.

[0008] In the technical solution of the present invention, the connecting tube structure includes a connecting tube whose front end is coaxially fixed with the rear end of the coupling and two reset mechanisms symmetrically arranged in the wall of the connecting tube. The connecting tube is provided with a plug-in cavity for plugging into the uniform load assembly. The reset mechanism includes a pressure rod, a pin rod arranged on the front side of the pressure rod, and a cross rod horizontally arranged between the pressure rod and the pin rod.

[0009] In the technical solution of the present invention, a pin hole matched with the pin rod is provided on the front side of the wall of the plug-in cavity, a spring is provided between the top end of the pin rod and the corresponding inner top surface of the pin rod hole, the pin rod is slidably connected with the corresponding pin rod hole, the top end of the pressure rod passes through the outer tube wall of the connecting tube, the end faces of both ends of the cross rod are arranged in inclined surfaces, the bottom end face of the pressure rod is matched with the front end face of the cross rod, and the bottom end face of the pin rod is matched with the rear end face of the cross rod.

[0010] In the technical solution of the present invention, the load uniforming assembly includes a bracket, a hysteresis brake fixed on the bracket for generating a load, and a plug-in column connected to the connecting assembly, the rear end of the plug-in column is coaxially fixed with the rotating shaft of the hysteresis brake, a hydraulic cylinder is fixed to the middle part of the rear inner wall of the test bench, the telescopic end of the hydraulic cylinder is fixed to the rear side wall of the bracket, and the bracket is slidably connected to the test bench.

[0011] In the technical solution of the present invention, a conical head is provided at the front end of the plug-in column, the plug-in column is adapted to the size of the plug-in cavity, outwardly protruding flanges are symmetrically fixed on the left and right sides of the plug-in column, and plug-in holes adapted to the pin rod are symmetrically provided on the upper and lower outer walls of the plug-in column.

[0012] 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 first fixing frame and the second fixing frame are respectively provided at the front end and the rear end of the rotating rod, the first fixing frame and the second fixing frame are both fixedly connected to the test bench, the rotating rod passes through the first fixing frame and the two are rotatably connected, and the rear end of the rotating rod is embedded in the second fixing frame and the two are rotatably connected.

[0013] In the technical solution of the present invention, the position of the turning plate corresponds to the position of the shifting rod, the shifting rod groove is adapted to the size of the shifting rod, a fixed rod is fixed to the front end of the outer wall of the rotating rod, a rotating shaft is coaxially fixedly connected between the turning plate and the rope collecting member, the rotating shaft passes through the fixed rod and the two are rotatably connected.

[0014] In the technical solution of the present invention, the counterweight structure includes a mounting block fixed to the bottom end of the pull rope in the middle of the top surface and a counterweight block arranged below the mounting block, limit blocks are fixed on the left and right sides of the mounting block, the limit blocks are slidably connected to the inner wall of the load cylinder, a first mounting groove is provided on the bottom surface of the mounting block, a clamping block matched with the first mounting groove is provided on the top surface of the counterweight block, and a second mounting groove matched with the clamping block is provided on the bottom surface of the counterweight block.

[0015] In the technical solution of the present invention, the bottom end of the load cylinder is fixed to the outer wall of the rotating rod and the load cylinder is arranged on the front side of the fixed rod. The bottom end of the load cylinder is provided with an opening on the left side that matches the size of the counterweight block.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, by setting a connection component, during detection, the hydraulic cylinder is started to drive the load-leveling component to move forward, the transmission rod will move forward synchronously, the conical head will first contact the pin rod and push the two pin rods outward under the action of the conical surface, and the plug-in column will move forward without being blocked. When the plug-in hole moves to correspond to the position of the pin rod, the pin rod is ejected into the plug-in hole under the action of the spring to complete the locking. When switching the detection load, it is only necessary to press the pressure rod to slide the cross bar forward, and then push the pin rod up and back into the pin rod hole. At this time, the connection between the pin rod and the load-leveling component can be released, and the load can be quickly switched, and the operation is simple and convenient.

[0017] 2. In the present invention, by setting 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 collection member to rotate to pull the pull rope upward. The pull rope moving upward will pull the counterweight block to achieve the effect of sudden load. When the lever leaves the lever groove, the load will be cancelled, thereby achieving the effect of instantaneous load. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the connection components in the present invention; Figure 3 It is a cross-sectional view of the connection assembly in the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 It is a schematic diagram of the instantaneous load component in the present invention; Figure 6 It is a schematic diagram of the linkage structure in the present invention; Figure 7 It is a cross-sectional view of the rotating rod in the present invention; Figure 8 It is an exploded diagram of the pull rope structure in the present invention; Fig. 9 It is a cross-sectional view of the load bucket in the present invention; Fig.10 It is an exploded view of the counterweight structure in the present invention; Description of reference numerals: 1. Test bench; 2. Hydraulic motor; 3. Reducer; 4. Torque sensor; 5. Connecting assembly; 51. Coupling; 52. Connecting tube structure; 521. Connecting tube; 522. Insertion cavity; 523. Reset mechanism; 5231. Press rod; 5232. Cross rod; 5233. Pin rod; 524. Pin rod hole; 525. Spring; 53. Push rod; 6. Load-uniform component; 61. Hysteresis brake; 62. Plug-in column; 621. Conical head; 622. Plug-in hole; 623. Flange; 63. Bracket; 7. Hydraulic cylinder; 8. Instantaneous load assembly; 81. Transmission structure; 811. Transmission rod; 812. Rotating rod; 813. Card ball; 814. Sliding cavity; 815. Spiral groove; 82. First fixed frame; 83. Pull rope structure; 831. Turn plate; 832. Push rod groove; 833. Fixed rod; 834. Rotating shaft; 835. Rope collecting member; 836. Pull rope; 84. Second fixed frame; 85. Load cylinder; 851. Opening; 86. Counterweight structure; 861. Mounting block; 862. Limit block; 863. First mounting groove; 864. Counterweight block; 865. Card block; 866. Second mounting groove. DETAILED DESCRIPTION

[0019] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0020] Unless explicitly stated otherwise, throughout the specification, the term “comprise” or variations thereof such as “include” or “comprising” will be understood as including the stated elements or components but not excluding other elements or components.

[0021] Reference Figure 1-Figure 10 As shown, this embodiment provides a technical solution: The performance testing device of the hydraulic motor reducer assembly in the present invention comprises a test bench 1, on the top surface of the test bench 1 and fixedly mounted with a hydraulic motor 2, a reducer 3 and a torque sensor 4 in sequence from front to back, the hydraulic motor 2 is coaxially connected to the reducer 3, the reducer 3 is coaxially connected to the torque sensor 4, and the torque sensor 4 is arranged to monitor the torque applied to the reducer 3 during the test, which is a prior art in the art, and the specific principle is not described in detail here, the rear end of the torque sensor 4 is connected to a uniform load assembly 6 for loading by arranging a connecting assembly 5, and a transient load assembly 8 for adding a transient load is arranged on the right side of the connecting assembly 5, and the situation that the reducer 3 is continuously subjected to the same load is detected by arranging the uniform load assembly 6, and the situation that the reducer 3 is subjected to a transient load and the load suddenly increases is detected by arranging the transient load assembly 8; The connecting assembly 5 includes 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 on the outer wall of the connecting tube structure 52. The connecting assembly 5 is provided to facilitate the connection of the uniform load assembly 6 and the switching between the instantaneous load assembly 8 and the uniform load assembly 6. The transient load assembly 8 includes 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 includes a rotating rod 812 which is sleeved and rotatably connected to the transmission rod 811 and the front end of the transmission rod 811. A locking ball 813 is fixed symmetrically at the front end of the transmission rod 811. A sliding cavity 814 is provided in the rotating rod 812 for the transmission rod 811 to slide forward and backward. The inner wall of the sliding cavity 814 is provided with two spiral grooves 815 adapted to the locking ball 813. When the transmission rod 811 moves backward, the locking ball 813 will drive the rotating rod 812 to rotate clockwise through the spiral groove 815, thereby driving the entire instantaneous load component 8 to rotate clockwise and disengage from the connecting component 5, thereby 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. The rope pulling structure 83 includes 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, and a rope 836 is wound around the rope collecting member 835; A load cylinder 85 is provided on the transmission structure 81, and a counterweight structure 86 is arranged in the load cylinder 85. 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. During the rotation process, the rotating plate 831 pulls the counterweight structure 86 through the pull rope 836 to achieve the effect of giving an instantaneous load to the reducer 3.

[0022] Among them, Figure 1-Figure 4 As shown, the connecting cylinder structure 52 includes a connecting cylinder 521 whose front end is coaxially fixed with the rear end of the coupling 51 and two reset mechanisms 523 symmetrically arranged in the cylinder wall of the connecting cylinder 521. The connecting cylinder 521 is provided with a plug-in cavity 522 plugged with the load-uniform component 6. The reset mechanism 523 includes a pressure rod 5231, a pin rod 5233 arranged in front of the pressure rod 5231, and a cross rod 5232 horizontally arranged between the pressure rod 5231 and the pin rod 5233. The cross rod 5232 can slide back and forth in the connecting cylinder 521. When not detected, the bottom end of the pin rod 5233 passes through the cavity wall of the plug-in cavity 522 inwardly. Furthermore, 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, and 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 tube wall of the connecting tube 521, and the end faces of both ends of the cross bar 5232 are arranged as inclined surfaces, the bottom end face of the pressure rod 5231 is matched with the front end face of the cross bar 5232, and the bottom end face of the pin rod 5233 is matched with the rear end face of the cross bar 5232. When the detection is completed, the pressure rod 5231 is pressed to make the cross bar 5232 slide forward, thereby pushing the pin rod 5233 to move up and back into the pin hole 524. At this time, the connection between the pin rod 5233 and the uniform load component 6 can be released.

[0023] In addition, the load-distributing assembly 6 includes 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 is coaxially fixed with the rotating shaft of the hysteresis brake 61. The hysteresis brake 61 is a commonly used detection equipment in the performance detection of the reducer 3. It is a prior art in this field and will not be described in detail here. A hydraulic cylinder 7 is fixed to 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 wall of the bracket 63. The bracket 63 is slidably connected to the test bench 1. The load-distributing assembly 6 is driven by the hydraulic cylinder 7 to move forward and backward to complete the separation and connection with the connecting assembly 5.

[0024] Furthermore, a conical head 621 is provided at the front end of the plug-in column 62, and the plug-in column 62 is adapted to the size of the plug-in cavity 522. The left and right sides of the plug-in column 62 are symmetrically fixed with protruding flanges 623, and the outer wall of the plug-in column 62 is symmetrically provided with plug-in holes 622 adapted to the pin rod 5233. When the hydraulic cylinder 7 drives the load-balancing assembly 6 to move forward, the conical head 621 will first contact the pin rod 5233 and push the two pin rods 5233 outward under the action of the conical surface. At this time, the plug-in column 62 moves forward without being blocked. When the plug-in hole 622 moves to a position corresponding to the pin rod 5233, the pin rod 5233 bounces into the plug-in hole 622 under the action of the spring 525 to complete the locking.

[0025] In addition, if Figure 5-Figure 7 As 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 rotating rod 812 is provided with a first fixing frame 82 and a second fixing frame 84 at the front and rear ends respectively. 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. When the hydraulic cylinder 7 drives the load-uniforming assembly 6 to move forward, the transmission rod 811 will move forward synchronously, so that the card ball 813 passes through the spiral groove 815 forward, and synchronously drives the rotating rod 812 to rotate clockwise through the spiral groove 815.

[0026] Furthermore, the position of the rotating plate 831 corresponds to the position of the lever 53, the lever groove 832 is adapted to the size of the lever 53, a fixed rod 833 is fixed to the front end of the outer wall of the rotating rod 812, and 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 fixed rod 833 and the two are rotatably connected. When the rotating rod 812 rotates, it will drive the fixed 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 lever 53. At this time, the conversion of the instantaneous load component 8 to the uniform load component 6 can be completed.

[0027] In addition, if Figure 8-Figure 10As shown, the counterweight structure 86 includes 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. Limit blocks 862 are fixed on the left and right sides of the mounting block 861. The limit blocks 862 are slidably connected to the inner wall of the load tube 85. When performing instantaneous load detection, when the lever 53 rotates to the lever slot 832, it will drive the rotating plate 831 to rotate, and then drive the subsequent rotating shaft 834 to drive the rope collecting member 835 to rotate to pull the pull rope 836 upward. The pull rope 836 moving upward will pull the counterweight block 864 to increase the load. When the lever 53 leaves the lever slot 832, the load will be cancelled, thereby achieving the effect of instantaneous load. Furthermore, a first mounting groove 863 is provided on the bottom surface of the mounting block 861, a block 865 matched with the first mounting groove 863 is provided on the top surface of the counterweight block 864, a second mounting groove 866 matched with the block 865 is provided on the bottom surface of the counterweight block 864, 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, and an opening 851 matched with the size of the counterweight block 864 is provided on the left side of the bottom end of the load cylinder 85. By setting the opening 851, when it is necessary to increase the instantaneous load, the counterweight block 864 is added to the load cylinder 85 through the opening 851, so that the block 865 on the top of the added counterweight block 864 and the second mounting groove 866 on the bottom surface of the previous counterweight block 864 can be engaged with each other.

[0028] The working principle of the performance testing device of the hydraulic motor reducer assembly in the present invention is specifically as follows: When performing the uniform load test, the hydraulic cylinder 7 is started to drive the uniform load assembly 6 to move forward, and the transmission rod 811 will move forward synchronously. The conical head 621 will first contact the pin rod 5233 and push the two pin rods 5233 outward under the action of the conical surface. At this time, the plug-in column 62 moves forward without being blocked. When the plug-in hole 622 moves to the position corresponding to the pin rod 5233, the pin rod 5233 is ejected into the plug-in hole 622 under the action of the spring 525 to complete the locking. At the same time, the transmission rod 811 will move forward synchronously, and the 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 and separate from the lever 53. At this time, the conversion from the instantaneous load component 8 to the uniform load component 6 can be completed, and the hydraulic motor 2 can be started to perform the performance test of the reducer 3; After the uniform load detection is completed, the pressure rod 5231 is pressed 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 assembly 6 can be released, and 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 collecting member 835 to rotate to pull the pull rope 836 upward. The upward moving pull rope 836 will pull the counterweight block 864, achieving the effect of sudden load. When the lever 53 leaves the lever groove 832, the load will be cancelled, thereby achieving the effect of instantaneous load.

[0029] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations are made in accordance with the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited 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); A load cylinder (85) is provided on the transmission structure (81), 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).

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 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.

9. The performance testing device of the hydraulic motor reducer assembly according to claim 8, characterized in that: The counterweight structure (86) comprises a mounting block (861) fixed to the bottom end of the pull rope (836) at the middle of the top surface, and a counterweight block (864) arranged below the mounting block (861); limit blocks (862) are fixed to the left and right sides of the mounting block (861); the limit blocks (862) are slidably connected to the inner wall of the load cylinder (85); a first mounting groove (863) is provided on the bottom surface of the mounting block (861); a clamping block (865) matched with the first mounting groove (863) is provided on the top surface of the counterweight block (864); and a second mounting groove (866) matched with the clamping block (865) is provided on the bottom surface of the counterweight block (864).

10. The performance testing device of the hydraulic motor reducer assembly according to claim 9, 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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