Clutch performance testing fixtures and testing systems

Abstract

This utility model discloses a clutch performance testing fixture and a testing system with the clutch performance testing fixture, including a base, an input shaft, a transmission shaft, and a transmission mechanism. The base is connected to the testing equipment and has a positioning groove and an internal gear ring. The positioning groove is used to position the lower end of the main shaft, and the internal teeth of the internal gear ring are used to mesh with the external teeth on the outer hub. The input shaft is connected to the rotating shaft of the testing equipment. The external teeth on the inner hub at the lower end of the transmission shaft are used to mesh with the internal teeth on the clutch disc. The transmission mechanism includes a hook and a hook body. The hook body can hook onto the hook part to transmit torque. One of the hook part and the hook body is connected to the upper end of the transmission shaft, and the other is connected to the upper end of the input shaft. By directly inserting the lower end of the main shaft into the positioning groove of the base, and then fitting the inner hub onto the main shaft and inserting it into the space enclosed by the clutch disc, the steps for clamping the clutch are reduced and the operation method is simple, which facilitates the clamping of the clutch and helps to improve the testing efficiency of the clutch.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts production equipment technology, and in particular to a clutch performance testing fixture and testing system. Background Technology

[0002] On a clutch production line, the efficiency of the End of Line (EOL) testing station directly determines the overall efficiency of the production line. The EOL testing station is equipped with testing equipment for clutches. This equipment positions the clutch using a testing fixture and detects the torque experienced by the clutch on the fixture using a torque sensor. However, current testing fixtures or tooling are relatively complex, making it difficult to position, fix, and align the clutch with the rotating shaft, resulting in low testing efficiency. Furthermore, the specialized nature of these fixtures or tooling means that when switching to a new clutch, the entire testing fixture or tooling needs to be replaced, leading to a large workload and low efficiency. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a clutch performance testing fixture, which facilitates clutch clamping and effectively improves testing efficiency.

[0004] This utility model also proposes a testing system with the above-mentioned clutch performance testing fixture.

[0005] According to a first aspect of the present invention, a clutch performance testing fixture includes a base, an input shaft, a transmission shaft, and a transmission mechanism. The base is detachably connected to a testing device. The base is provided with a positioning groove and an internal gear ring. The positioning groove is used to position the lower end of the main shaft. The internal teeth of the internal gear ring are used to mesh with the external teeth on the outer hub. The input shaft is connected to the rotating shaft of the testing device. The lower end of the transmission shaft is connected to an inner hub. The external teeth on the inner hub are used to mesh with the internal teeth on the clutch disc. The transmission mechanism includes a hook portion and a hook body. One of the hook portion and the hook body is connected to the upper end of the transmission shaft, and the other is connected to the upper end of the input shaft. The hook body can hook onto the hook portion to transmit torque.

[0006] It has at least the following beneficial effects: the lower end of the main shaft is directly inserted into the positioning groove of the base, and then the inner hub is fitted onto the main shaft and inserted into the space enclosed by the clutch plate. The steps of clamping the clutch are few and the operation method is simple, which makes it easy to clamp the clutch. By rotating the main shaft or the rotating shaft, the hook and the hook body are positioned relative to each other in the vertical direction. Then the rotating shaft drives the input shaft to move down so that the hook body hooks onto the hook part, and the clutch performance can be tested, which can effectively improve the testing efficiency.

[0007] According to some embodiments of the present invention, there are multiple hooks and multiple hook bodies. The multiple hooks are all connected to the upper end of the transmission shaft and are circumferentially distributed around the central axis of the transmission shaft. The multiple hook bodies are all connected to the input shaft and are circumferentially distributed around the central axis of the input shaft.

[0008] According to some embodiments of the present invention, the upper end of the transmission shaft is provided with an annular portion, the annular portion extends radially along the transmission shaft, and the annular portion has multiple notches, all of which penetrate the upper and lower surfaces of the annular portion. The multiple notches are circumferentially distributed around the central axis of the transmission shaft, and the area between two adjacent notches of the annular portion is the hook portion, the hook body being able to pass through the notch.

[0009] According to some embodiments of the present invention, one end of the hook body is vertical and connected to the input shaft, the other end of the hook body is horizontal, the other end of the hook body can pass through the gap between two adjacent hook bodies from top to bottom, the hook body and the input shaft form a groove, and the hook part can be inserted into the groove.

[0010] According to some embodiments of this utility model, the groove opening of the positioning groove and the upper end of the inner teeth of the inner gear ring are both provided with chamfers to guide the lower end of the main shaft to extend into the positioning groove and guide the outer hub to extend into the inner gear ring.

[0011] According to some embodiments of the present invention, the transmission shaft is provided with a central through hole for the main shaft to pass through, and the lower end face of the input shaft is provided with an elastic member and a rotating member from top to bottom, and the rotating member can abut against the upper end of the main shaft.

[0012] According to some embodiments of the present invention, a centering block is also included, which is disposed on the lower end face of the input shaft. The centering block is provided with a centering hole for the upper end of the spindle to be inserted.

[0013] According to some embodiments of the present invention, the base is provided with a positioning member, and a handle is detachably connected to the transmission shaft. The handle is used to drive the transmission shaft to rotate. When the handle is opposite to the positioning member, the hook body is opposite to the hook portion, so that the hook body can hook the hook portion.

[0014] According to some embodiments of the present invention, the base includes an oil hub and a fixing sleeve disposed on the end face of the oil hub, the positioning groove is disposed on the upper end face of the oil hub, the internal gear ring is disposed on the inner wall of the fixing sleeve, and the central axis of the positioning groove coincides with the center of the circle corresponding to the internal gear ring.

[0015] The detection system according to a second aspect of the present invention includes a detection device, a torque sensor, and a clutch performance detection fixture according to the first aspect of the present invention described above. The base is connected to the detection device, the input shaft is connected to the rotating shaft, and the torque sensor is disposed between the base and the detection device or between the input shaft and the rotating shaft. The torque sensor detects the torque between the base and the detection device or between the input shaft and the rotating shaft.

[0016] It has at least the following beneficial effects: the testing fixture has fewer parts and a simple structure, the operation steps are simple and the method of use is convenient. The testing fixture can realize quick clamping and disassembly of the clutch. The rotating shaft of the testing equipment can directly drive the input shaft to complete the clutch performance test, thereby improving the efficiency of clutch performance testing.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the clutch structure according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 3 This is a cross-sectional view of an embodiment of the present invention and the clutch. Figure 4 for Figure 3 A magnified view of a portion of point A in the middle; Figure 5 This is a schematic diagram of the structure of this utility model after concealing the input shaft and hook body; Figure 6 This is a schematic diagram of the input shaft and hook body in an embodiment of the present invention; Icon labels: Clutch 1, main shaft 11, oil inlet 111, clutch plate 12, outer hub 13; Base 2, oil hub 21, positioning groove 211, fixing sleeve 22, internal gear ring 221, positioning component 222, material reduction port 223; Input axis 3; Drive shaft 4, inner hub 41, notch 42, center through hole 43; Hook 5; Hook body 6; Elastic component 7; Rotating component 8; Centering block 9, centering hole 91; Handle 10. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figure 1 First, it's important to understand that clutch 1 includes a main shaft 11, clutch plates 12, and an outer hub 13. When clutch 1 is placed vertically, the main shaft 11 has upper and lower ends. An oil inlet 111 is located on the outer wall of the lower end of the main shaft 11. Supplying oil to the clutch 1 through the oil inlet 111 engages the clutch plates 12. Clutch performance includes drag capacity and torque transmission capacity. Drag capacity measures the torque transmitted by the clutch plates 12 when they are not engaged, while torque transmission capacity measures the torque transmitted by the clutch plates 12 when they are engaged.

[0023] Reference Figure 2 and Figure 3 This utility model discloses a clutch performance testing fixture, including a base 2, an input shaft 3, a transmission shaft 4, and a transmission mechanism. The base 2 is detachably fixed to the testing equipment. The base 2 is provided with a positioning groove 211 and an internal gear ring 221. The positioning groove 211 is used to position the lower end of the main shaft 11, and the internal gear ring 221 is used to mesh with the external teeth on the outer hub 13, so that the base 2 can restrict the rotation of the outer hub 13. The input shaft 3 is used to connect to the rotating shaft of the testing equipment. The lower end of the transmission shaft 4 is connected to the inner hub 41, which is used to mesh with the clutch plate 12. The transmission mechanism includes a hook part 5 and a hook body 6. The hook body 6 can hook onto the hook part 5 to transmit torque. One of the hook part 5 and the hook body 6 is connected to the upper end of the transmission shaft 4, and the other is connected to the upper end of the input shaft 3.

[0024] When installing the clutch performance testing fixture, first connect the base 2 to the testing equipment, and connect the input shaft 3 to the rotating shaft of the testing equipment. The torque sensor is located between the base 2 and the testing equipment, or between the input shaft 3 and the rotating shaft. The rotating shaft drives the input shaft 3 to rotate around a vertical (up-down) axis. The input shaft 3 and base 2 are vertically distributed. When performing performance testing on the clutch, first place the clutch on the base 2. Insert the lower end of the main shaft 11 into the positioning groove 211. The external teeth on the outer hub 13 mesh with the internal teeth of the internal gear ring 221, allowing the base 2 to restrict the rotation of the outer hub 13, while the main shaft 11 can rotate in the positioning groove 211. Then, fit the inner hub 41 onto the main shaft 11, making... The inner hub 41 is inserted from top to bottom into the space enclosed by the clutch plate 12. The outer teeth of the inner hub 41 mesh with the inner teeth of the clutch plate 12, thereby enabling torque transmission between the inner hub 41 and the clutch plate 12. By rotating the main shaft 11 or the rotating shaft, the hook 5 and the hook body 6 are positioned relative to each other in the vertical direction. Then, the rotating shaft drives the input shaft 3 to move downward, so that the hook body 6 hooks onto the hook 5, thereby connecting the input shaft 3 and the transmission shaft 4 together and enabling torque transmission. When testing the clutch performance, the rotating shaft rotates, and the rotating shaft, input shaft 3, transmission shaft 4, inner hub 41 and clutch plate 12 transmit torque in sequence. The torque transmitted by the clutch 1 is obtained through the torque sensor, thereby realizing the clutch performance test.

[0025] The lower end of the main shaft 11 is directly inserted into the positioning groove 211 of the base 2. Then, the inner hub 41 is fitted onto the main shaft 11 and inserted into the space enclosed by the clutch plate 12. By rotating the main shaft 11 or the rotating shaft, the hook 5 and the hook body 6 are positioned relative to each other in the vertical direction. The steps for clamping the clutch are few and the operation method is simple. Then, the rotating shaft drives the input shaft 3 to move down so that the hook body 6 hooks onto the hook 5. The clutch performance can then be tested, which can effectively improve the testing efficiency.

[0026] The input shaft 3, hook 5, and hook body 6 can be configured as universal accessories. When changing the type or specification of the clutch to test different types or specifications of clutches, the input shaft 3, hook 5, and hook body 6 do not need to be disassembled and replaced. Different bases 2 can be replaced, or different bases 2, different drive shafts 4, and different inner hubs 41 can be replaced at the same time. This is convenient and quick, and the performance testing fixture has high changeover efficiency. Some parts of the performance testing fixture are universal, reducing the cost of the testing fixture and the cost of clutch performance testing.

[0027] The testing fixture has fewer parts and a simple structure. The operation steps are simple and the method of use is convenient, which can improve the efficiency of clutch performance testing.

[0028] It should be noted that the base 2 is cylindrical in shape. The base 2, the positioning groove 211 and the internal gear ring 221 have the same axis. After the base 2 is fixed on the testing equipment, the axis of the base 2 is parallel to the vertical direction. The transmission shaft 4 and the inner hub 41 also have the same axis. When the hook 6 is hooked on the hook part 5, the rotating shaft, the input shaft 3, the transmission shaft 4, the inner hub 41, the positioning groove 211, the internal gear ring 221, the main shaft 11, the clutch plate 12 and the outer hub 13 are all on the same vertical axis, ensuring that the rotating shaft can drive the clutch plate 12 to rotate around the central axis of the main shaft 11.

[0029] Reference Figure 5 and Figure 6 In some embodiments, there are multiple hooks 5 and multiple hook bodies 6. Multiple hooks 5 are connected to the upper end of the drive shaft 4 and are circumferentially distributed around the central axis of the drive shaft 4. Multiple hook bodies 6 are connected to the input shaft 3 and are circumferentially distributed around the central axis of the input shaft 3. Multiple hook bodies 6 and multiple hooks 5 cooperate one by one to form multiple transmission mechanisms distributed around the central axis of the input shaft 3 / drive shaft 4. The input shaft 3 and the drive shaft 4 transmit torque through multiple transmission mechanisms. While transmitting greater torque, it can make the input shaft 3 and the drive shaft 4 more balanced in terms of force, which is beneficial to improving the service life of the transmission mechanism, the input shaft 3 and the drive shaft 4.

[0030] It should be noted that the central angle formed by any two adjacent hooks 5 and the central axis of the transmission shaft 4 is equal in size, the central angle formed by any two adjacent hooks 6 and the central axis of the input shaft 3 is equal in size, and the central angle formed by two adjacent hooks 5 and the central axis of the transmission shaft 4 is equal to the central angle formed by two adjacent hooks 6 and the central axis of the input shaft 3.

[0031] It is conceivable that the positions of hook 5 and hook body 6 can be interchanged.

[0032] Reference Figure 5In some embodiments, the upper end of the drive shaft 4 is provided with an annular portion that extends radially along the drive shaft 4. The annular portion has multiple notches 42, all of which penetrate the upper and lower surfaces of the annular portion. The multiple notches 42 are circumferentially distributed around the central axis of the drive shaft 4. The area between two adjacent notches 42 of the annular portion is a hook portion 5, and the hook body 6 can pass through the notch 42. When the hook 6 is directly above the notch 42, the rotating shaft drives the input shaft 3 and the hook 6 to move downwards. After the hook 6 passes through the notch 42 from top to bottom, the rotating shaft drives the input shaft 3 and the hook 6 to rotate, and the hook 6 can hook onto the hook part 5, so that the hook 6 and the hook part 5 can be connected and transmit torque. When the rotating shaft drives the input shaft 3 and the hook 6 to move along the opposite path, the hook 6 can be disengaged from the hook part 5, the input shaft 3 and the hook 6 can be reset, and the input shaft 3 and the hook 6 can be moved away from the transmission shaft 4 and the base 2, so as to avoid interference caused by the input shaft 3 and the hook 6 to the installation of the base 2, maintenance of the base 2, clamping of the clutch, removal of the clutch from the base 2, insertion of the inner hub 41 into the space enclosed by the clutch plate 12, and pulling the inner hub 41 out of the space enclosed by the clutch plate 12.

[0033] Reference Figure 6 In some embodiments, one end of the hook 6 is vertical and connected to the input shaft 3, while the other end is horizontal. The other end of the hook 6 can pass through the gap between two adjacent hooks 6 from top to bottom, forming a groove between the hook 6 and the input shaft 3. The hook 5 can be engaged in the groove. When the hook 6 is above the gap between two adjacent hooks 6, the hook 6 moves downward, and the other end of the hook 6 passes through the gap between two adjacent hooks 6 from top to bottom, so that the groove formed by the hook 6 and the input shaft 3 is at the same height as the hook 5. Then, the hook 6 rotates at a certain angle, and the hook 5 is engaged in the groove, thus connecting the hook 6 and the hook 5. Torque can be transmitted between the hook 6 and the hook 5. Since the other end of the hook 6 is horizontal, the hook 5 can be engaged in the groove, and the other end of the hook 6 can abut against the lower surface of the hook 5. The hook 6 and the input shaft 3 clamp the hook 5, enabling the hook 6 and the input shaft 3 to drive the hook 5 and the transmission shaft 4 to rise and fall. When a clutch is tested, the rotating shaft drives the input shaft 3, transmission mechanism, transmission shaft 4 and inner hub 41 to rise, remove the tested clutch from the base 2 and place a new clutch to be tested on the base 2. Then, the hook 5, transmission shaft 4 and inner hub 41 are removed from the input shaft 3 and the inner hub 41 is inserted into the space enclosed by the new clutch disc 12 to be tested. This process is repeated to perform performance testing on a new clutch. The operation is convenient and the testing efficiency is high.

[0034] In another embodiment, the hook 6 is a protrusion or bump extending axially along the input shaft 3 / drive shaft 4, located at an eccentric position on the input shaft 3 / drive shaft 4 (centered on the central axis of the input shaft 3 / drive shaft 4). The hook portion 5 is a groove extending axially along the input shaft 3 / drive shaft 4, located at an eccentric position. The cross-sectional shape and size of the protrusion or bump and the groove are adapted to each other so that the protrusion or bump can be inserted into the groove. The outer wall of the protrusion or bump abuts against the inner wall of the groove, thereby transmitting torque between the protrusion or bump and the side wall of the groove. It is conceivable that the cross-sectional shape of the protrusion or bump and the cross-sectional shape of the groove can be circular or regular polygonal.

[0035] Reference Figure 3 In some embodiments, the opening of the positioning groove 211 is chamfered to guide the lower end of the main shaft 11 into the positioning groove 211, and the upper end of the internal teeth of the internal gear ring 221 is chamfered to guide the outer hub 13 into or into the space enclosed by the internal gear ring 221. The chamfering facilitates the convenient and quick insertion of the lower end of the main shaft 11 into the positioning groove 211 and the insertion of the outer hub 13 into the space enclosed by the internal gear ring 221, thereby enabling the outer teeth of the outer hub 13 to mesh with the internal teeth of the internal gear ring 221.

[0036] Reference Figure 4 and Figure 5 In some embodiments, the drive shaft 4 is provided with a central through hole 43. The drive shaft 4 and the central through hole 43 have the same central axis. The central through hole 43 is used for the main shaft 11 to pass through. The drive shaft 4 is provided to transmit torque between the transmission mechanism and the inner hub 41. The width of the inner hub 41 in the vertical direction does not need to be set too large. It is sufficient that the external teeth of the inner hub 41 can mesh with the internal teeth of the clutch plates 12 of all heights.

[0037] The lower end face of the input shaft 3 is provided with an elastic element 7 and a rotating element 8 from top to bottom. The rotating element 8 can abut against the upper end of the main shaft 11. When the inner hub 41 is inserted into the space enclosed by the clutch plate 12 from top to bottom, the upper end of the main shaft 11 is inserted into the central through hole 43 from bottom to top, and the upper end of the main shaft 11 abuts against the rotating element 8. The elastic element 7 has deformation capability and plays a buffering role to prevent the upper ends of the input shaft 3 and the main shaft 11 from crushing the rotating element 8. The rotating element 8 can make the input shaft 3 and the main shaft 11 rotate relative to each other, so that when the input shaft 3 rotates, the main shaft 11 can remain stationary.

[0038] The elastic element 7 is a disc spring, compression spring, or rubber block. The rotating element 8 is a thrust bearing.

[0039] Reference Figure 4 and Figure 5In some embodiments, the testing fixture also includes a centering block 9, which is located on the lower end face of the input shaft 3. The centering block 9 has a centering hole 91 for the upper end of the main shaft 11 to be inserted. The centering block 9 ensures that the upper end of the main shaft 11 does not tilt, thus ensuring the accurate positioning of the entire clutch 1 and ensuring the smooth progress and accuracy of the clutch performance test.

[0040] It should be noted that a recessed groove is provided at the center of the lower end face of the input shaft 3. The centering block 9 is annular, and its upper end is installed in the recessed groove, making the centering hole 91 and the input shaft 3 coaxial. The centering hole 91 is a stepped hole that is larger at the top and smaller at the bottom. The inner wall of the centering hole 91 has a step. The elastic element 7 and the rotating element 8 are both located at the upper end of the centering hole 91. The lower end face of the rotating element 8 abuts against the step on the inner wall of the centering hole 91, thus positioning the input shaft 3 and the centering block 9. The input shaft 3 and the centering block 9 are connected by multiple first fasteners. The first fasteners are first bolts or first screws.

[0041] Reference Figure 4 The input shaft 3 has a recessed groove at the center of its lower end face, and the rotating shaft has a positioning boss on its lower end face that mates with the recessed groove. When the positioning boss is inserted into the recessed groove, the rotating shaft and the input shaft 3 can be quickly connected. The rotating shaft and the input shaft 3 are connected by multiple fourth fasteners. The fourth fasteners are fourth bolts or fourth screws.

[0042] When the inner hub 41 is inserted into the space enclosed by the clutch plate 12, the external teeth on the inner hub 41 need to mesh with the internal teeth on the clutch plate 12. Therefore, before inserting the inner hub 41 into the space enclosed by the clutch plate 12, the drive shaft 4 and the inner hub 41 will be rotated at a certain angle so that the external teeth on the inner hub 41 are above the two adjacent internal teeth on the clutch plate 12. Then the drive shaft 4 and the inner hub 41 are driven to descend. At this time, the hook part 5 and the hook body 6 will not be in the same position in the vertical direction. Therefore, it is necessary to rotate the rotating shaft or the drive shaft 4 so that the hook part 5 and the hook body 6 are in the same position in the vertical direction before the drive shaft 4 and the inner hub 41 can be moved down, thereby inserting the inner hub 41 into the space enclosed by the clutch plate 12.

[0043] Reference Figure 2 , Figure 3 and Figure 5In some embodiments, the base 2 is provided with a positioning element 222, and a handle 10 is detachably connected to the drive shaft 4. The handle 10 is used to drive the drive shaft 4 to rotate. When the handle 10 is opposite to the positioning element 222, the hook body 6 is opposite to the hook part 5 so that the hook body 6 can hook the hook part 5. The drive shaft 4 and the inner hub 41 can be easily rotated by the handle 10. The drive shaft 4 and the inner hub 41 are rotated to the appropriate position by observing whether the handle 10 and the positioning element 222 are opposite. When the handle 10 is opposite to the positioning element 222, the rotation of the drive shaft 4 and the inner hub 41 is stopped. At this time, the hook part 5 and the hook body 6 are opposite in the vertical direction.

[0044] The handle 10 is shaped like a tuning fork. The handle 10 has a handle plate and two parallel connecting plates. The handle plate and the two parallel connecting plates form a U-shaped groove. The transmission shaft 4 has two parallel flat parts on its outer circular surface. When the handle 10 is sleeved on the two flat parts, the two connecting plates abut against the two flat parts respectively. At this time, when the handle 10 is rotated, the two connecting plates will drive the two flat parts to rotate, thereby driving the transmission shaft 4 to rotate. The positioning component 222 consists of two vertical rods, both of which are vertical and threaded to the upper end face of the base 2. The distance between the two furthest areas of the two vertical rods is equal to the distance between the two opposing sides of the two connecting plates. The two connecting plates are provided with a second chamfer at the corresponding U-shaped groove opening. When the handle 10 and the positioning component 222 are close to being opposite each other, the handle 10 is driven to move towards the vertical rods. The two vertical rods and the second chamfer can force the handle 10 and the drive shaft 4 to rotate, so that the U-shaped groove is aligned with the two vertical rods. The two connecting plates are then fitted onto the two vertical rods, thereby making the handle 10 and the positioning component 222 relative to each other.

[0045] Reference Figure 3 In some embodiments, the base 2 includes an oil hub 21 and a fixing sleeve 22 disposed on the end face of the oil hub 21. A positioning groove 211 is disposed on the upper end face of the oil hub 21. The fixing sleeve 22 is sleeve-shaped. An internal gear ring 221 is disposed on the inner wall of the fixing sleeve 22. The central axis of the positioning groove 211 coincides with the center of the corresponding circle of the internal gear ring 221. When the lower end of the spindle 11 is inserted into the positioning groove 211, the external teeth on the outer hub 13 can mesh with the internal teeth of the internal gear ring 221.

[0046] In some embodiments, the positioning groove 211 is provided with two sealing rings distributed vertically. The two sealing rings are used to fit over the lower end of the main shaft 11 so that the oil inlet 111 is located between the two sealing rings. The positioning groove 211, the two sealing rings, and the outer wall of the lower end of the main shaft 11 form an oil cavity. The oil hub 21 is provided with an oil passage. The inner sidewall of the positioning groove 211 has an outlet for the oil passage in the area between the two sealing rings. The inlet of the oil passage is located on the lower end face of the oil hub 21. The inlet of the oil passage, the oil passage, the outlet of the oil passage, the oil cavity, and the oil inlet 111 are connected in sequence. By supplying oil to the inside of the clutch 1, the clutch plate 12 is pressed, thereby realizing the detection of the torque transmission capability of the clutch 1.

[0047] Reference Figure 2 or Figure 5 In some embodiments, the upper end face of the fixing sleeve 22 is provided with a material reduction opening 223, which penetrates the inside and outside of the fixing sleeve 22. The material reduction opening 223 can reduce the weight of the fixing sleeve 22, reduce the processing difficulty of the fixing sleeve 22, and reduce the cost of the fixing sleeve 22.

[0048] The drive shaft 4 and the inner hub 41 are coaxially arranged and connected by multiple second fasteners. These second fasteners are second bolts or second screws. The oil hub 21 and the fixing sleeve 22 are coaxially arranged and connected by multiple third fasteners. These third fasteners are third bolts or third screws. The input shaft 3 and the hook body 6 can be integrally formed or separate structures, and the drive shaft 4 and the hook part 5 can be integrally formed or separate structures.

[0049] This utility model also discloses a testing system, including a testing device, a torque sensor, and the aforementioned clutch performance testing fixture. The base 2 is connected to the testing device, the input shaft 3 is connected to the rotating shaft, and the torque sensor is located between the base 2 and the testing device or between the input shaft 3 and the rotating shaft. The torque sensor detects the torque between the base 2 and the testing device or between the input shaft 3 and the rotating shaft, thereby realizing the detection of the torque of the clutch 1.

[0050] The testing fixture has fewer parts and a simple structure. The operation steps are simple and the method of use is convenient. The testing fixture can quickly clamp and remove the clutch. The rotating shaft of the testing equipment can directly drive the input shaft 3 to rotate to complete the clutch performance test, thereby improving the efficiency of clutch performance testing.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A clutch performance test fixture, characterized by, include: The base is detachably connected to the testing equipment. The base is provided with a positioning groove and an internal gear ring. The positioning groove is used to position the lower end of the spindle, and the internal teeth of the internal gear ring are used to mesh with the external teeth on the outer hub. The input shaft is connected to the rotating shaft of the detection device. The drive shaft has an inner hub connected to its lower end, and the external teeth on the inner hub are used to mesh with the internal teeth on the clutch plate. A transmission mechanism includes a hook and a hook body, one of which is connected to the upper end of the transmission shaft and the other is connected to the upper end of the input shaft. The hook body is capable of hooking onto the hook to transmit torque.

2. The clutch performance testing fixture according to claim 1, characterized in that, The number of hooks and hook bodies are both multiple. The multiple hooks are all connected to the upper end of the transmission shaft and are circumferentially distributed around the central axis of the transmission shaft. The multiple hook bodies are all connected to the input shaft and are circumferentially distributed around the central axis of the input shaft.

3. The clutch performance testing fixture according to claim 2, characterized in that, The upper end of the drive shaft is provided with an annular portion, which extends radially along the drive shaft. Multiple notches are provided on the annular portion, and all the notches penetrate the upper and lower surfaces of the annular portion. The multiple notches are circumferentially distributed around the central axis of the drive shaft. The area between two adjacent notches of the annular portion is the hook portion, and the hook body can pass through the notch.

4. The clutch performance testing fixture according to claim 2 or 3, characterized in that, One end of the hook is vertical and connected to the input shaft, and the other end of the hook is horizontal. The other end of the hook can pass through the gap between two adjacent hooks from top to bottom. The hook and the input shaft form a groove, and the hook can be inserted into the groove.

5. The clutch performance testing fixture according to claim 1, characterized in that, The locating groove and the upper end of the internal teeth of the internal gear ring are both chamfered to guide the lower end of the main shaft into the locating groove and the outer hub into the internal gear ring.

6. The clutch performance testing fixture according to claim 1, characterized in that, The drive shaft is provided with a central through hole for the main shaft to pass through. The lower end face of the input shaft is provided with an elastic element and a rotating element from top to bottom. The rotating element can abut against the upper end of the main shaft.

7. The clutch performance testing fixture according to claim 1 or 6, characterized in that, It also includes a centering block, which is located on the lower end face of the input shaft. The centering block has a centering hole for the upper end of the spindle to be inserted.

8. The clutch performance testing fixture according to claim 1, characterized in that, The base is provided with a positioning component, and a handle is detachably connected to the drive shaft. The handle is used to drive the drive shaft to rotate. When the handle is opposite to the positioning component, the hook body is opposite to the hook portion, so that the hook body can hook the hook portion.

9. The clutch performance testing fixture according to claim 1, characterized in that, The base includes an oil hub and a fixing sleeve disposed on the end face of the oil hub. The positioning groove is disposed on the upper end face of the oil hub, and the internal gear ring is disposed on the inner wall of the fixing sleeve. The central axis of the positioning groove coincides with the center of the circle corresponding to the internal gear ring.

10. A detection system, characterized in that, The device includes a testing device, a torque sensor, and a clutch performance testing fixture according to any one of claims 1 to 9. The base is connected to the testing device, the input shaft is connected to the rotating shaft, and the torque sensor is disposed between the base and the testing device or between the input shaft and the rotating shaft. The torque sensor detects the torque between the base and the testing device or between the input shaft and the rotating shaft.

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