Torque testing device for a power take-off
By working together with the sensing, testing, and feedback components, the problems of damage under high torque and inaccurate measurement under low torque in power take-off torque testing are solved, achieving both safety and accuracy in torque testing and facilitating maintenance.
Patent Information
- Application Number
- CN202510434834.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2045-04-08
AI Technical Summary
Existing power take-off torque testing devices cannot cut off power output in time when faced with high torque, resulting in damage to the connection parts. At low torque, they cannot accurately measure stable values, affecting subsequent maintenance.
A torque testing device is designed, comprising a sensing component, a testing component, and a feedback component. The sensing component senses the torque and drives the support block, telescopic rod, and annular ring to slide via a rotating shaft. The testing component records the values. The feedback component cuts off the power and performs cooling maintenance when the maximum value is reached.
It prevents equipment damage under high torque, accurately measures values under low torque, and cuts off power in a timely manner to ensure equipment safety and facilitate subsequent maintenance.
Smart Images
Figure CN120274924B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power take-off (PTO) manufacturing technology, and more particularly to a torque testing device for PTOs. Background Technology
[0002] A power take-off (PTO) is one or more sets of transmission gears, also known as a power output device. It is generally composed of a gearbox, clutch, and controller, and is connected to the low gear or auxiliary gearbox output shaft to output power to external working devices, such as lifting pumps. During the production of PTOs, in order to ensure that the PTO can normally bear external torque when working, it is necessary to perform torque testing.
[0003] Currently, when performing torque testing on a power take-off (PTO), it is usually necessary to connect the PTO end to the testing equipment. However, when the torque of the PTO is large, the testing equipment cannot cut off the power output at the connection point in time, resulting in the large torque damaging the connection point. When the torque is small, it is impossible to accurately obtain the stable value when it rotates, which is inconvenient for subsequent rework and repair. Summary of the Invention
[0004] In order to solve the problems existing in the prior art, the present invention provides a torque testing device for a power take-off.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a torque testing device for a power take-off, comprising a transmission box, a top cover provided on the top of the transmission box, a rotating shaft provided inside the transmission box, a sensing component provided inside the transmission box, a movable cavity provided near one edge inside the transmission box, a testing component provided inside the movable cavity, and an adjustment cavity provided on one side of the movable cavity inside the transmission box, a feedback component provided inside the adjustment cavity;
[0006] The top of the rotating shaft extends through to the top of the top cover, and the bottom of the rotating shaft extends through to the bottom of the transmission box. Flange covers are provided on the top of the top cover and the bottom of the transmission box. Both ends of the rotating shaft are located on the inner side of the flange covers. An electrical interface is provided on the top of the top cover near one edge. Copper pillars are fixed on the inner bottom surface of the electrical interface near both edges.
[0007] Preferably, a copper plate is fixed to the outer surface of one of the copper pillars, and the bottom of the copper plate is in contact with the inner bottom surface of the electrical interface. A spring copper sheet is fixed to the outer surface of the other copper pillar, one end of the spring copper sheet extends to the top of the copper plate, and the bottom of the spring copper sheet is in contact with the top of the copper plate. A through-hole is provided on the inner bottom surface of the electrical interface, and the through-hole extends into the interior of the movable cavity.
[0008] Preferably, the sensing component includes an annular ring, which is slidably connected to the inner wall component of the transmission box. The bottom of the annular ring is inclined near one edge, and an annular raceway is formed on the inclined bottom surface of the annular ring. Multiple support blocks are equidistantly arranged at the bottom of the annular ring along the circumferential direction. Each of the multiple support blocks has a ball bearing rotatably arranged on its top, and the multiple balls bearing are correspondingly and rollingly connected inside the annular raceway.
[0009] Preferably, a plurality of load blocks are fixed at equal intervals along the circumferential direction on the outer surface of the rotating shaft, and each load block has a telescopic rod rotatably mounted on its bottom, with one end of each telescopic rod rotatably connected to the other side of the support block.
[0010] Preferably, the test assembly includes a push plate, which is slidably disposed inside the movable cavity. A guide opening is provided on one inner wall of the movable cavity, and one side of the guide opening extends into the interior of the transmission box. A guide block is slidably disposed between the inner walls on both sides of the guide opening. One side of the guide block is fixed to the push plate, and the other side of the guide block is fixed to the annular ring. A latch is provided on the outer surface of the push plate near the guide block.
[0011] Preferably, the front side of the push plate is inclined with a waist-shaped groove extending to the rear side. A slide rod is slidably arranged between the inner walls of the two sides of the waist-shaped groove. Both ends of the slide rod extend to the front and rear sides of the push plate. A scale plate is provided on one side of the transmission box. One end of the scale plate slides through the interior of the movable cavity. One end of the scale plate extends to both ends of the slide rod near the front and rear edges and is fixed to both ends of the slide rod. A bakelite block is fixed to the top of the push plate and is located directly below the through opening.
[0012] Preferably, the feedback component includes a bending plate, which is slidably disposed inside the adjustment cavity near one side edge. The bottom end of the bending plate slides through into the interior of the movable cavity, and one side of the bottom end of the bending plate is in contact with the outer surface of the push plate. A lever is fixed to the top of the bending plate, and one end of the lever slides through into the interior of the movable cavity and is located directly below the adjustment port.
[0013] Preferably, the top of the adjustment cavity has a side cavity, and a sliding plate is slidably disposed between the inner walls of the side cavity. The bottom of the sliding plate is fixed to the top of the bending plate. A return spring is fixed to one side of the sliding plate, and one end of the return spring is fixed to one side of the inner wall of the side cavity. The top of the sliding plate has a bridge interface that extends to the bottom.
[0014] Preferably, the inner wall of the transmission box has a flow channel on one side of the adjustment cavity, the bottom of the flow channel extends to the top of the guide port, the top of the flow channel extends to the bottom surface of the side cavity, the top cover has an oil cavity, the bottom surface of the oil cavity has an oil inlet, the oil inlet extends to the inside of the side cavity, and the top of the top cover is fixed with a feed pipe extending into the oil cavity, the oil inlet being located directly above the flow channel.
[0015] Preferably, the top surface of the guide port is provided with a docking groove, which is connected to the bottom of the flow channel. The bottom surface of the guide port is provided with a flow guiding cavity, and the bottom surface of the flow guiding cavity is provided with a drain outlet. One end of the drain outlet extends to the outside of the transmission box. The bottom surface of the transmission box is provided with an annular groove, and the bottom surface of the annular groove is provided with a bending hole. One end of the bending hole extends into the flow guiding cavity. A bridge pipe is provided inside the guide block. The bottom of the bridge pipe extends into the flow guiding cavity, and the top of the bridge pipe extends above the guide block and is located directly below the docking groove. A throttling hole is provided on one inner wall of the bridge pipe, which extends into the annular raceway. The bottom of the bridge pipe is closed.
[0016] Compared with the prior art, the beneficial effects of the present invention are:
[0017] 1. This invention, by incorporating a sensing component, a testing component, and a feedback component, can promptly cut off the power supply when the maximum test value is reached during testing, thereby preventing damage to the testing equipment due to excessive torque. It also indicates that the torque generated by the tested equipment is qualified, and can measure stable values when the torque is small, facilitating subsequent repair and maintenance. When the equipment generates a small torque, it also indicates that the equipment is unqualified.
[0018] 2. This invention uses a sensing component to sense and measure the generated torque, thereby driving the testing component to work and obtain the measured value. When the sensing component is working, the rotating shaft is first connected to the output end of the power take-off to be tested. The torque generated by the power take-off to be tested drives the rotating shaft to rotate. The greater the torque generated, the greater the rotational inertia generated by the rotating shaft. The rotational inertia generated will drive multiple blocks, telescopic rods, balls and rings to slide upward. During the upward sliding of the rings, the testing component will be driven to work.
[0019] 3. By incorporating a testing component, this invention can quantify the magnitude of the torque sensed by the sensing component, making it easy for people to read. At the same time, when the torque is large, it can drive the feedback component to work while cutting off the power supply, thereby preventing the torque from continuing to increase and causing damage to the testing mechanical device.
[0020] 4. By incorporating a feedback component, this invention can promptly cut off the power supply after the device generates a large torque and passes the test, while simultaneously positioning the test component, cooling and maintaining the sensing component, and draining the generated contaminated oil. Attached Figure Description
[0021] Figure 1 This invention provides a top-view three-dimensional structural diagram of a torque testing device for a power take-off (PTO);
[0022] Figure 2 This invention provides a bottom-view three-dimensional structural diagram of a torque testing device for a power take-off unit;
[0023] Figure 3 This invention provides a side-section perspective view of a torque testing device for a power take-off unit.
[0024] Figure 4 This invention provides a three-dimensional cross-sectional view of another side of a torque testing device for a power take-off unit.
[0025] Figure 5 This invention provides a front-view three-dimensional structural diagram of the rotating shaft and the annular ring in a torque testing device for a power take-off.
[0026] Figure 6 This invention provides a cross-sectional three-dimensional structural diagram of the rotating shaft and the annular ring in a torque testing device for a power take-off.
[0027] Figure 7 For the present invention Figure 3 A magnified view of a portion of point A in the middle;
[0028] Figure 8 For the present invention Figure 3 A magnified view of a portion of point B in the middle.
[0029] In the diagram: 1. Transmission box; 2. Top cover; 3. Flange cover; 4. Shaft; 5. Electrical interface; 6. Copper column; 7. Adjustment port; 8. Copper plate; 9. Spring copper sheet; 10. Scale plate; 11. Drain outlet; 12. Through port; 13. Movable cavity; 14. Push plate; 15. Bakelite block; 16. Waist-shaped groove; 17. Slide rod; 18. Feed pipe; 19. Guide port; 20. Weight block; 21. Telescopic rod; 22. Annular ring 23. Support block; 24. Annular raceway; 25. Ball bearing; 26. Oil cavity; 27. Adjustment cavity; 28. Dial plate; 29. Oil inlet; 30. Bending clamp; 31. Side cavity; 32. Slide plate; 33. Bridge interface; 34. Return spring; 35. Flow channel; 36. Connecting groove; 37. Bayonet; 38. Guide block; 39. Bridge connector; 40. Flow guide cavity; 41. Bending hole; 42. Annular groove; 43. Throttling orifice. Detailed Implementation
[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0031] Please see Figure 1-8 The present invention provides a technical solution: a torque testing device for a power take-off, comprising a transmission box 1, a top cover 2 on the top of the transmission box 1, a rotating shaft 4 inside the transmission box 1, a sensing component inside the transmission box 1, a movable cavity 13 near one edge inside the transmission box 1, a testing component inside the movable cavity 13, and an adjustment cavity 27 on one side of the movable cavity 13 inside the transmission box 1, a feedback component inside the adjustment cavity 27;
[0032] The top of the rotating shaft 4 extends to the top of the top cover 2, and the bottom of the rotating shaft 4 extends to the bottom of the transmission box 1. Flange covers 3 are provided on the top of the top cover 2 and the bottom of the transmission box 1. Both ends of the rotating shaft 4 are located on the inner side of the flange covers 3. An electrical interface 5 is provided on the top of the top of the top cover 2 near one side edge. Copper pillars 6 are fixed on the inner bottom surface of the electrical interface 5 near both sides edge. A copper plate 8 is fixed on the outer surface of one of the copper pillars 6. The bottom of the copper plate 8 is in contact with the inner bottom surface of the electrical interface 5. A spring copper sheet 9 is fixed on the outer surface of the other copper pillar 6. One end of the spring copper sheet 9 extends to the top of the copper plate 8. The bottom of the spring copper sheet 9 is in contact with the top of the copper plate 8. A through-hole 12 is provided on the inner bottom surface of the electrical interface 5. The through-hole 12 extends into the interior of the movable cavity 13.
[0033] The effect achieved is that, by incorporating sensing, testing, and feedback components, the power supply can be promptly cut off when the maximum test value is reached during testing. This prevents damage to the testing equipment due to excessive torque, and also indicates that the torque generated by the tested equipment is qualified. Furthermore, it can measure stable values when the torque is low, facilitating subsequent repair and maintenance. Conversely, if the equipment generates insufficient torque, it indicates that the equipment is unqualified. This solves the problem that current testing equipment cannot promptly cut off the power output at the docking point when the torque of the power take-off is high, leading to damage to the docking point due to excessive torque. Conversely, when the torque is low, it is impossible to accurately obtain stable values during rotation, which is inconvenient for subsequent rework and repair.
[0034] like Figure 4 , Figure 5 , Figure 6 and Figure 8As shown, the sensing component includes an annular ring 22, which is slidably connected to the inner wall of the transmission box 1. The bottom of the annular ring 22 is inclined near one edge, and an annular raceway 24 is provided on the inclined bottom surface of the annular ring 22. Multiple support blocks 23 are equidistantly arranged at the bottom of the annular ring 22 along the circumferential direction. Each support block 23 has a ball bearing 25 rotatably arranged on its top. The ball bearing 25 is rotatably connected to the inside of the annular raceway 24. Multiple load blocks 20 are fixed at equal intervals along the circumferential direction on the outer surface of the rotating shaft 4. Each load block 20 has a telescopic rod 21 rotatably arranged at its bottom. One end of each telescopic rod 21 is rotatably connected to the other side of the support block 23.
[0035] The effect achieved is as follows: first, the rotating shaft 4 is connected to the output end of the power take-off to be tested. The torque generated by the power take-off to be tested drives the rotating shaft 4 to rotate. The greater the torque generated, the greater the rotational inertia generated by the rotating shaft 4. The rotational inertia generated will drive multiple support blocks 23, telescopic rods 21, ball bearings 25 and ring rings 22 to slide upward. During the upward sliding of the ring rings 22, the test components will be driven to work.
[0036] like Figure 1 , Figure 3 , Figure 4 and Figure 8 As shown, the test assembly includes a push plate 14, which is slidably disposed inside the movable cavity 13. A guide opening 19 is provided on one inner wall of the movable cavity 13, extending through one side of the guide opening 19 into the transmission box 1. A guide block 38 is slidably disposed between the two inner walls of the guide opening 19. One side of the guide block 38 is fixed to the push plate 14, and the other side is fixed to the annular ring 22. A latch 37 is provided on the outer surface of the push plate 14 near the guide block 38, and a through-hole is obliquely provided on the front side of the push plate 14. The waist-shaped groove 16 on the rear side is slidably provided with a slide rod 17 between the inner walls of the two sides of the waist-shaped groove 16. Both ends of the slide rod 17 extend to the front and rear sides of the push plate 14 respectively. A scale plate 10 is provided on one side of the transmission box 1. One end of the scale plate 10 slides through into the interior of the movable cavity 13. One end of the scale plate 10 extends to both ends of the slide rod 17 near the front and rear edges and is fixed to both ends of the slide rod 17. A bakelite block 15 is fixed on the top of the push plate 14. The bakelite block 15 is located directly below the through opening 12.
[0037] The effect is that when the annular ring 22 slides upward, it will drive the guide block 38 and the push plate 14 to slide upward together. During the upward sliding of the push plate 14, since the sliding rod 17 is still inside the waist-shaped groove 16 and the waist-shaped groove 16 is inclined on the push plate 14, the sliding rod 17 can be pushed to the outside of the transmission box 1 during the upward sliding of the push plate 14, thereby pushing the scale plate 10 to the outside, causing its value to change. The resulting value change is the measured rotational torque, which is convenient for people to record.
[0038] like Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the feedback component includes a bent clamping plate 30, which is slidably disposed inside the adjustment cavity 27 near one side edge. The bottom end of the bent clamping plate 30 slides through into the interior of the movable cavity 13, and one side of the bottom end of the bent clamping plate 30 is in contact with the outer surface of the push plate 14. A lever 28 is fixed to the top of the bent clamping plate 30, and one end of the lever 28 slides through into the interior of the movable cavity 13 and is located directly below the adjustment port 7. A side cavity 31 is opened at the top of the adjustment cavity 27, and the inner walls of the side cavity 31 are slidably disposed... A sliding plate 32 is provided, with its bottom fixed to the top of the bending clamping plate 30. A return spring 34 is fixed to one side of the sliding plate 32, with one end of the return spring 34 fixed to the inner wall of one side of the side cavity 31. A bridge interface 33 extending through to the bottom is provided at the top of the sliding plate 32. A flow channel 35 is provided on the inner wall of the transmission box 1 on one side of the adjustment cavity 27. The bottom of the flow channel 35 extends through to the top of the guide port 19, and the top of the flow channel 35 extends through to the bottom surface of the inner side cavity 31. An oil cavity 26 is provided inside the top cover 2. An oil inlet 29 is provided on the bottom surface of the oil cavity 26, extending into the interior of the side cavity 31. A feed pipe 18, extending into the oil cavity 26, is fixed to the top of the top cover 2. The oil inlet 29 is located directly above the flow channel 35. A docking groove 36 is provided on the top surface of the guide port 19, communicating with the bottom of the flow channel 35. A guide cavity 40 is provided on the bottom surface of the guide port 19, and a drain port 11 is provided on the bottom surface of the guide cavity 40. One end of the drain port 11 extends to the outside of the transmission box 1. An annular groove 42 is provided on the inner bottom surface of the box 1. A bending hole 41 is provided on the inner bottom surface of the annular groove 42. One end of the bending hole 41 extends into the interior of the guide cavity 40. A bridge pipe 39 is provided inside the guide block 38. The bottom of the bridge pipe 39 extends into the interior of the guide cavity 40, and the top of the bridge pipe 39 extends above the guide block 38 and is located directly below the docking groove 36. A throttling hole 43 is provided on one inner wall of the bridge pipe 39, which extends into the interior of the annular raceway 24. The bottom of the bridge pipe 39 is closed.
[0039] The effect achieved is that when the push plate 14 slides above the movable cavity 13, the top of the bridge pipe 39 will engage inside the docking groove 36, and the bottom of the bridge pipe 39 will slide upward from inside the guide cavity 40, so that the bending hole 41 is connected to the guide cavity 40. Under the elastic force of the return spring 34, the slide plate 32 will slide towards the adjustment port 7. During the sliding process, the bottom end of the bending plate 30 will engage inside the slot 37, and at the same time, the oil inlet 29 and the flow channel 35 will be connected through the bridge interface 33. At this time, the lubricating and cooling oil inside the oil cavity 26 can enter the bridge pipe 39, and then flow into the annular raceway 24 through the throttling hole 43 to lubricate and cool the annular raceway 24. The dirty oil after lubrication and cooling falls into the annular groove 42, and then flows into the guide cavity 40 through the bending hole 41, and finally is discharged from the drain port 11.
[0040] Working principle: When using this device, firstly, coolant and lubricating oil is injected into the oil chamber 26. Then, the rotating shaft 4 is connected to the output end of the power take-off to be tested. The torque generated by the power take-off to be tested drives the rotating shaft 4 to rotate. The greater the torque generated, the greater the rotational inertia generated by the rotating shaft 4. The generated rotational inertia will drive multiple support blocks 23, telescopic rods 21, ball bearings 25, and annular rings 22 to slide upward. When the annular rings 22 slide upward, they will drive the guide block 38 and the push plate 14 to slide upward together. During the upward sliding of the push plate 14, since the sliding rod 17 is still inside the waist-shaped groove 16, and the waist-shaped groove 16 is inclined on the push plate 14, the sliding rod 17 can be pushed outward of the transmission box 1 during the upward sliding of the push plate 14, thereby pushing the scale plate 10 outward, causing its value to change. The resulting value change is the measurement value. The magnitude of the rotational torque is easily recorded. When the push plate 14 slides above the movable cavity 13, the top of the bridge pipe 39 will engage inside the docking groove 36, and the bottom of the bridge pipe 39 will slide upward from inside the guide cavity 40, so that the bending hole 41 is connected to the guide cavity 40. Under the elastic force of the return spring 34, the slide plate 32 will slide towards the adjustment port 7. During the sliding process, the bottom end of the bending plate 30 will engage inside the slot 37, and at the same time, the oil inlet 29 and the flow channel 35 will be connected through the bridge interface 33. At this time, the lubricating and cooling oil inside the oil cavity 26 can enter the bridge pipe 39, and then flow into the annular raceway 24 through the throttling hole 43 to lubricate and cool the annular raceway 24. The dirty oil after lubrication and cooling falls into the annular groove 42, and then flows into the guide cavity 40 through the bending hole 41, and finally is discharged from the drain port 11.
[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A torque testing device for a power take-off, characterized by The utility model provides a transmission box, the top of transmission box (1) is equipped with top cover (2), the inside of transmission box (1) is equipped with rotating shaft (4), the inside of transmission box (1) is equipped with inductive assembly, the inside of transmission box (1) is close to the edge of one side and is equipped with movable cavity (13), the inside of movable cavity (13) is equipped with test assembly, the inside of transmission box (1) is located in movable cavity (13) one side and is equipped with adjusting cavity (27), the inside of adjusting cavity (27) is equipped with feedback assembly, The top of rotating shaft (4) is threaded to the top of top cover (2), the bottom of rotating shaft (4) is threaded to the bottom of transmission box (1), the top of top cover (2) and the bottom of transmission box (1) are equipped with flange cover plate (3), both ends of rotating shaft (4) are located in the inside of flange cover plate (3) correspondingly, the top of top cover (2) is close to the edge of one side and is equipped with electric interface (5), the inside bottom surface of electric interface (5) is close to the edge of both sides and is fixed with copper column (6), inductive assembly includes annular ring (22), annular ring (22) is connected in the inner wall group of transmission box (1) slidingly, the bottom of annular ring (22) is close to the edge of one side and is inclined, the bottom of annular ring (22) is equipped with annular raceway (24) in inclined surface, the bottom of annular ring (22) is equipped with a plurality of toptank (23) in circumferential direction equidistance, a plurality of toptank (23) are all equipped with ball (25) rotationally, a plurality of ball (25) are all connected in the inside of annular raceway (24) correspondingly, the outer surface of rotating shaft (4) is fixed with a plurality of weight blocks (20) in circumferential direction equidistance, the bottom of a plurality of weight blocks (20) is all equipped with telescopic rod (21) rotationally, one end of a plurality of telescopic rods (21) is all connected in the other side of toptank (23) rotationally, The test assembly includes a push plate (14) slidingly arranged inside a movable cavity (13), a guide opening (19) is arranged on the inner wall of one side of the movable cavity (13), the guide opening (19) penetrates to the inside of the transmission box (1) on one side, a guide block (38) is slidingly arranged between the inner walls of the two sides of the guide opening (19), one side of the guide block (38) is fixed on the push plate (14), the other side of the guide block (38) is fixed on the annular ring (22), a bayonet (37) is arranged on the outer surface of one side of the push plate (14) close to the guide block (38), an oblique waist-shaped groove (16) is arranged on the front side of the push plate (14) and penetrates to the rear side, a slide rod (17) is slidingly arranged between the inner walls of the two sides of the waist-shaped groove (16), the two ends of the slide rod (17) extend to the front and rear sides of the push plate (14), a scale plate (10) is arranged on one side of the transmission box (1), one end of the scale plate (10) slidingly penetrates to the inside of the movable cavity (13), the front and rear edges of one end of the scale plate (10) extend to the two ends of the slide rod (17) and are fixed with the two ends of the slide rod (17), an electric wood block (15) is fixed on the top of the push plate (14), and the electric wood block (15) is located directly below the through opening (12).
2. A torque testing device for a puller as defined in claim 1, characterized in that: The outer surface of one of the copper columns (6) is fixed with a copper plate (8), the bottom of the copper plate (8) is attached to the inner bottom surface of the electrical interface (5), the outer surface of the other copper column (6) is fixed with a spring copper sheet (9), one end of the spring copper sheet (9) extends to the top of the copper plate (8), and the bottom of the spring copper sheet (9) is attached to the top of the copper plate (8), the inner bottom surface of the electrical interface (5) is provided with a through opening (12) penetrating to the inside of the movable cavity (13).
3. A torque testing device for a puller as defined in claim 2, characterized in that: The feedback assembly includes a bending clamping plate (30) slidingly arranged inside the adjusting cavity (27) close to one side edge, the bottom end of the bending clamping plate (30) slidingly penetrates to the inside of the movable cavity (13), one side of the bottom end of the bending clamping plate (30) is attached to the outer surface of the push plate (14), and the top of the bending clamping plate (30) is fixed with a dial plate (28), one end of the dial plate (28) slidingly penetrates to the inside of the movable cavity (13) and is located directly below the adjusting opening (7).
4. A torque testing device for a puller as defined in claim 3, characterized in that: The top of the adjusting cavity (27) is provided with a side cavity (31), a sliding plate (32) is slidingly arranged between the inner walls of the side cavity (31), the bottom of the sliding plate (32) is fixed with the top of the bending clamping plate (30), one side of the sliding plate (32) is fixed with a return spring (34), one end of the return spring (34) is fixed on one side of the inner wall of the side cavity (31), and the top of the sliding plate (32) is provided with a bridging opening (33) penetrating to the bottom.
5. A torque testing device for a puller as defined in claim 4, characterized in that: The inner wall of the transmission case (1) is provided with a flow channel (35) on one side of the adjusting cavity (27), the bottom of the flow channel (35) penetrates to the top of the guide port (19), the top of the flow channel (35) penetrates to the inner bottom surface of the side cavity (31), the inner part of the top cover (2) is provided with an oil cavity (26), the inner bottom surface of the oil cavity (26) is provided with an oil inlet (29), the oil inlet (29) penetrates to the inside of the side cavity (31), the top of the top cover (2) is fixedly provided with a feeding pipe (18) penetrating to the inside of the oil cavity (26), and the oil inlet (29) is located directly above the flow channel (35).
6. A torque testing device for a puller as defined in claim 5, characterized in that: The inner top surface of the guide port (19) is provided with a butt joint groove (36), the butt joint groove (36) and the bottom of the flow channel (35) are in communication with each other, the inner bottom surface of the guide port (19) is provided with a flow guide cavity (40), the inner bottom surface of the flow guide cavity (40) is provided with a blowdown port (11), one end of the blowdown port (11) penetrates to the outside of the transmission case (1), the inner bottom surface of the transmission case (1) is provided with an annular groove (42), the inner bottom surface of the annular groove (42) is provided with a bending hole (41), one end of the bending hole (41) penetrates to the inside of the flow guide cavity (40), the inside of the guide block (38) is provided with a bridging pipe (39), the bottom of the bridging pipe (39) extends to the inside of the flow guide cavity (40), the top of the bridging pipe (39) extends to above the guide block (38) and is located directly below the butt joint groove (36), one side inner wall of the bridging pipe (39) is provided with a throttling small hole (43) penetrating to the inside of the annular raceway (24), and the bottom of the bridging pipe (39) is in a closed state.
Citation Information
Patent Citations
Comprehensive testing device of electric actuating mechanism
CN119354389A
Thrust detection device for electric actuating mechanism
CN119533730A