A joint detector for a constant velocity joint drive shaft assembly

Abstract

The present application relates to the technical fields of driving shaft gap detection, and discloses a kind of clearance detector of constant velocity universal joint driving shaft assembly, including drive assembly including fixedly connected at the sidewall of base electric telescopic rod, electric telescopic rod is fixedly connected with mounting plate at the end away from base, when formal work, the power supply of electric telescopic rod is connected, the gear of outward migration is under the restriction of rack, will generate rotation, and force bevel gear two to rotate, rotating bevel gear two is driven rotating ring same direction rotation by transmission component, rotating rotating ring will drive fixed head to the one end of driving shaft to be twisted, and carry out torsion detection procedure, and in this process, laser recorder will pass through the rotation angle of detection scale tooth, record the change of clearance to rotation angle in the process that driving shaft is outwardly extended, equipment can be realized in real time record the torsion angle caused by clearance, improve the accuracy of data.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of driving shaft gap detection equipment, in particular to a gap detector of a constant velocity joint driving shaft assembly. BACKGROUND

[0002] Since the fixed joint is composed of a shell, a retainer, a star sleeve and other components in sequence with a gap, and there is a gap between each component, the gap between each component will become larger or smaller when stressed, and the difference between the maximum and minimum values of the gap is called the axial gap of the fixed joint; the components at one end of the fixed joint are connected to other parts in the automobile transmission structure except the constant velocity joint driving shaft assembly, and the star sleeve at the other end of the fixed joint is connected to the intermediate shaft through a spline, and the fit tolerance of the spline is called the axial gap between the fixed joint and the intermediate shaft; for the axial gap of the fixed joint, the gap between each component of the fixed joint is usually stretched to the maximum distance by hand, at which time the maximum value of the gap is measured; then the gap between each component of the fixed joint is compressed to the minimum distance, and the minimum value of the gap is measured, and then the maximum distance value is subtracted from the minimum distance value to obtain the axial gap of the fixed joint, and for the axial gap between the fixed joint and the intermediate shaft, a value is usually estimated by hand, and finally the value is added to the axial gap of the fixed joint to obtain the gap of the constant velocity joint driving shaft assembly.

[0003] However, the axial gap data of the fixed joint obtained by the above design is the data when the fixed joint is completely combined and completely expanded, but in actual vehicle application, the fixed joint is rarely completely expanded or closed, and the obtained data is not sufficient for practical application scenarios. In view of the above problems, the following scheme is proposed. SUMMARY

[0004] To solve the above technical problems, the present application provides a gap detector of a constant velocity joint driving shaft assembly, which comprises a fixing mechanism, the fixing mechanism has an installation space inside, and a driving shaft is installed in the installation space;

[0005] A driving mechanism is installed on the side wall of the fixing mechanism, which provides driving force for the equipment and is used for torsion test of the driving shaft;

[0006] A transmission mechanism is fixedly arranged on the side wall of the driving mechanism, which is used for converting the force generated by the driving mechanism into torsion force on the driving shaft;

[0007] Wherein, before use, the driving shaft is clamped and limited on the top of the fixing mechanism, and the force generated by the driving mechanism is converted into torsion force on the driving shaft at any time through the transmission mechanism to perform the detection link.

[0008] Preferably, the inside of the fixing mechanism includes a base, and the fixing mechanism comprises:

[0009] The clamping assembly is fixedly connected with the inner wall of the groove of the base, and is used for fixing and limiting the driving shaft;

[0010] The limiting assembly is fixedly arranged on the side wall of the base, and is used for providing resistance when the driving mechanism operates;

[0011] In use, the driving shaft is first clamped in the clamping assembly, and then the power supply of the driving mechanism is turned on.

[0012] Preferably, the driving mechanism comprises:

[0013] The driving assembly is fixedly arranged on the side wall of the base, and is used for providing power for the device;

[0014] The torsion assembly is fixedly connected with the side wall of the driving assembly, and is synchronously moved with the driving assembly when the driving assembly moves outward, and the outward moving torsion assembly contacts with the outer wall of the limiting assembly and generates a rotating force, which is transmitted to the driving shaft through the transmission mechanism;

[0015] When the torsion assembly contacts with the clamping assembly, the driving mechanism forces the driving shaft to be elongated, and the torsion assembly provides a torsion force, and the test driving shaft is tested for the change of the torsion angle with the different elongation lengths.

[0016] Preferably, the transmission mechanism comprises:

[0017] The measuring assembly is fixedly connected with the side wall of the driving assembly, and is used for detecting the torsion angle of the driving shaft in real time;

[0018] The transmission assembly is fixedly connected with the side wall of the torsion assembly, and is used for absorbing excess torsion force;

[0019] When the torsion assembly provides a torsion force, the torsion force is transmitted to the measuring assembly through the transmission assembly, and then transmitted to the driving shaft.

[0020] Preferably, the clamping assembly comprises a clamping frame fixedly connected with the inner wall of the groove of the base, and a buckle lock fixedly connected with the side wall of the clamping frame;

[0021] Before use, the driving shaft is placed in the inner wall of the clamping frame, and then the clamping frame is covered, and the driving shaft is clamped by the buckle lock, so that the driving shaft does not rotate or move due to the torsion force during operation.

[0022] Preferably, the limiting assembly comprises a tooth rod fixedly connected with the side wall of the base, and a sliding rail formed in the inner wall of the tooth rod;

[0023] When the driving assembly extends outward, the torsion assembly will rotate along the outer wall of the torsion assembly.

[0024] Preferably, the driving assembly comprises an electric telescopic rod fixedly connected to the side wall of the base, the end of the electric telescopic rod away from the base is fixedly connected with a mounting plate, the side wall of the mounting plate is slidably connected with the inner wall of the slide rail, the side wall of the mounting plate is fixedly connected with a limiting frame, and the top of the limiting frame is fixedly connected with a laser recorder.

[0025] When the gap in the driving shaft is too large, the torsion force generated by the torsion assembly will force the driving shaft to rotate, and the laser recorder will record the angle of rotation. After the extension is completed, the electric telescopic rod will generate a contraction force again, which will produce a reverse rotation, causing the bevel gear II to drive one end of the driving shaft to twist in the opposite direction. The angle of rotation generated by the twisting will be recorded by the laser recorder again, and the change in the gap to the rotation angle during the extension and contraction of the driving shaft will be recorded, improving the detection accuracy of the equipment.

[0026] Preferably, the torsion assembly comprises an L-shaped plate fixedly connected to the side wall of the mounting plate, a gear rotatably connected to the inner wall of the through hole of the L-shaped plate, a bevel gear I fixedly connected to the side wall of the gear, and a bevel gear II rotatably connected to the side wall of the mounting plate. During formal operation, the power supply of the electric telescopic rod is turned on, causing the electric telescopic rod to extend. The extended electric telescopic rod will drive the mounting plate and the limiting frame to move outward along the inner wall of the slide rail. The outward moving mounting plate will drive the L-shaped plate and the gear to move outward synchronously, causing the driving shaft to change from the J state to the H state. Figure 2

[0027] When the driving assembly drives the torsion assembly to move outward, the gear will be forced to rotate, and the rotating gear will force the bevel gear II to rotate.

[0028] Preferably, the measuring assembly comprises a rotating ring rotatably connected to the inner wall of the limiting frame, a fixed head fixedly connected to the inner wall of the rotating ring, a scale tooth opened at the top of the fixed head, and a limiting tooth groove opened at the inner wall of the rotating ring. The outward moving gear will rotate under the restriction of the gear rod. The rotating gear will drive the bevel gear II to rotate about the connecting point as the center line through the bevel gear I. The rotating bevel gear II will drive the rotating ring to rotate in the same direction through the transmission assembly. The rotating rotating ring will twist one end of the driving shaft through the fixed head, but the driving shaft cannot rotate due to the restriction of the clamping frame at this time. If the fixed head still rotates at this time, the angle is the angle generated by the gap of the driving shaft. During this process, the laser recorder will detect the rotation angle of the scale tooth to record the change in the rotation angle of the gap during the outward extension of the driving shaft. Through the application of the above-mentioned assembly, the equipment can record the twisting angle caused by the gap in real time, improving the accuracy of the data.​

[0029] The force of the second bevel gear rotation is transmitted to the limiting tooth groove through the transmission assembly, and the limiting tooth groove drives the fixed head to twist.

[0030] Preferably, the transmission assembly comprises a driving disc fixedly connected to the outer wall of the second bevel gear, ten sliding grooves are formed in the inner wall of the driving disc, ten obstruction blocks are slidingly connected to the inner wall of the ten sliding grooves, springs are fixedly connected to the bottom of the ten obstruction blocks, and the ends of the springs away from the obstruction blocks are fixedly connected to the inner wall of the sliding grooves. By utilizing the rotation characteristics of the second bevel gear, the transmission assembly is arranged in the equipment. When the second bevel gear rotates, the second bevel gear drives the obstruction blocks to roll along the inner wall of the limiting tooth groove through the driving disc. When there is a gap in the driving shaft, the rotating force of the second bevel gear is transmitted to the fixed head through the driving disc and the obstruction blocks, and the fixed head rotates.

[0031] The outer wall of the driving disc is in contact with the outer wall of the rotating ring, the outer wall of the second bevel gear is meshed with the outer wall of the first bevel gear, and the outer wall of the gear is meshed with the outer wall of the toothed rod. After the gap disappears or the rotation is completed, the driving shaft will no longer twist. If the driving assembly continues to move the one end of the driving shaft outward, the fixed head cannot rotate, but the second bevel gear still rotates under the influence of the first bevel gear and the gear. The rotating pressure is concentrated on the position of the obstruction block. With the increase of the pressure, the obstruction block shrinks, causing the driving disc to rotate. By applying the above-mentioned assembly, the excess twisting force of the second bevel gear is effectively offset, avoiding the continuous twisting of the second bevel gear and causing the deformation of the driving shaft.

[0032] When the number of rotations of the twisting assembly increases and the driving shaft cannot twist again, the obstruction block shrinks under pressure and offsets the excess rotating pressure.

[0033] In addition, the number of the above-mentioned assemblies is not limited, and those skilled in the art can freely set according to actual needs. As long as a plurality of obstruction blocks are divided into two groups, one group is completely clamped in the inner wall of the limiting tooth groove, and the other group is in a shrinking state.

[0034] The present application has the following advantages:

[0035] (1) The present application is aimed at the problem of inaccurate data. When formally working, the power supply of the electric telescopic rod is turned on, so that the electric telescopic rod is stretched. The stretched electric telescopic rod drives the mounting plate and the limiting frame to move outward along the inner wall of the slide rail, so that the driving shaft is slowly stretched and drives the bevel gear two to rotate. The laser recorder records the change of the rotation angle of the gap during the outward stretching of the driving shaft by detecting the rotation angle of the scale teeth. Through the application of the above components, the device can record the torsion angle caused by the gap in real time, and the accuracy of the data is improved.

[0036] (2) The present application utilizes the feature that the force required to detect the gap in the driving shaft does not need to be very large. A transmission assembly is provided. After the gap disappears or the rotation is completed, the driving shaft will no longer be twisted, and the rotating pressure will be concentrated at the position of the blocking block. With the increase of the pressure, the blocking block will shrink, causing the driving disc to rotate, effectively offsetting the excess torsional force of the bevel gear two, avoiding continuous torsion of the bevel gear two, and causing deformation of the driving shaft.

[0037] (3) The present application utilizes the feature that the blocking block slides. Two groups of blocking blocks are provided inside the device, and the two groups of blocking blocks are designed to be staggered. When one group of blocking blocks is in a compressed state, the other group of blocking blocks will be in an extended state. Through the above design, when the blocking blocks slide in the limiting tooth groove, the moving blocking blocks will offset part of the vibration caused by the elastic potential energy, reducing the influence of internal vibration force on the laser recorder when the blocking blocks change.

[0038] (4) After the stretching is completed, the electric telescopic rod will generate a contraction force again, which will cause a reverse rotation, causing the bevel gear two to drive one end of the driving shaft to twist in the opposite direction. The angle of torsion will be accepted by the laser recorder again, and the change of the torsion angle caused by the gap during the stretching and contraction of the driving shaft will be recorded, improving the detection accuracy of the device. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0040] Figure 1 It is a schematic diagram of the working state of the overall structure of the present application;

[0041] Figure 2 It is a schematic diagram of the working state of the overall structure of the present application;

[0042] Figure 3 It is a schematic diagram of the clamping assembly of the present application;

[0043] Figure 4 For the present invention Figure 3 Enlarged diagram of A in the middle;

[0044] Figure 5 This is a schematic diagram of the driving component of the present invention;

[0045] Figure 6 This is a cross-sectional schematic diagram of the torsion assembly of the present invention;

[0046] Figure 7 This is a cross-sectional schematic diagram of the measuring component of the present invention;

[0047] Figure 8 This is a schematic diagram of the internal structure of the measuring component of the present invention;

[0048] Figure 9 For the present invention Figure 8 Enlarged diagram of B in the diagram;

[0049] Figure 10 This is a schematic diagram of the blocking block's working state according to the present invention.

[0050] The attached diagram lists the components represented by each number as follows:

[0051] In the diagram: 1. Fixing mechanism; 11. Clamping assembly; 12. Restricting assembly; 13. Base; 111. Clamping frame; 112. Snap lock; 121. Gear rack; 122. Slide rail; 2. Drive mechanism; 21. Drive assembly; 22. Torsion assembly; 211. Electric telescopic rod; 212. Mounting plate; 213. Limiting frame; 214. Laser recorder; 221. L-shaped plate; 222. Gear; 223. Helical gear one; 224. Helical gear two; 3. Transmission mechanism; 31. Measuring assembly; 32. Transmission assembly; 311. Fixing head; 312. Scale tooth; 313. Rotating ring; 314. Restricting tooth groove; 321. Drive disk; 322. Slide groove; 323. Obstruction block; 324. Spring. Detailed Implementation

[0052] 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.

[0053] Example 1, please refer to Figure 1 - Figure 6 The present invention is a gap detector for a constant velocity universal joint drive shaft assembly, including a fixing mechanism 1, which has an installation space inside for mounting and fixing the drive shaft;

[0054] The driving mechanism 2 is installed on the side wall of the fixing mechanism 1, and provides driving force for the device to test the torsion of the driving shaft.

[0055] The transmission mechanism 3 is fixedly arranged on the side wall of the driving mechanism 2, and is used for converting the force generated by the driving mechanism 2 into a torsion force on the driving shaft.

[0056] Before use, the driving shaft is clamped and limited on the top of the fixing mechanism 1, and the force generated by the driving mechanism 2 is converted into a torsion force on the driving shaft through the transmission mechanism 3 at any time, and the detection link is carried out.

[0057] The inside of the fixing mechanism 1 includes a base 13, and the fixing mechanism 1 comprises:

[0058] The clamping assembly 11 is fixedly connected with the inner wall of the groove of the base 13, and is used for fixing and limiting the driving shaft.

[0059] The limiting assembly 12 is fixedly arranged on the side wall of the base 13, and is used for providing resistance when the driving mechanism 2 operates.

[0060] In use, the driving shaft is first clamped in the clamping assembly 11, and then the power supply of the driving mechanism 2 is turned on.

[0061] The driving mechanism 2 comprises:

[0062] The driving assembly 21 is fixedly arranged on the side wall of the base 13, and is used for providing power for the device.

[0063] The torsion assembly 22 is fixedly connected with the side wall of the driving assembly 21, and is synchronously moved with the driving assembly 21 when the driving assembly 21 moves outward. The outward moving torsion assembly 22 will contact the outer wall of the limiting assembly 12 and generate a rotating force, which is transmitted to the driving shaft through the transmission mechanism 3.

[0064] When the torsion assembly 22 contacts the clamping assembly 11, the driving mechanism 2 will force the driving shaft to be elongated, and the torsion assembly 22 provides a torsion force, so as to test the change of the torsion angle of the driving shaft with different elongation lengths.

[0065] The transmission mechanism 3 comprises:

[0066] The measuring assembly 31 is fixedly connected with the side wall of the driving assembly 21, and is used for detecting the torsion angle of the driving shaft in real time.

[0067] The transmission assembly 32 is fixedly connected with the side wall of the torsion assembly 22, and is used for absorbing the excess torsion force;

[0068] When the torsion assembly 22 provides the torsion force, the torsion force is transmitted to the measuring assembly 31 through the transmission assembly 32, and the measuring assembly 31 transmits the torsion force to the driving shaft.

[0069] Embodiment two, please refer to Figure 4 - Figure 10 On the basis of example one, the clamping assembly 11 comprises a clamping frame 111 fixedly connected with the inner wall of the groove of the base 13, and a buckle lock 112 fixedly connected with the side wall of the clamping frame 111.

[0070] Wherein, the driving shaft is placed in the inner wall of the clamping frame 111 before use, and then the clamping frame 111 is covered, and the driving shaft is clamped through the buckle lock 112, so that the driving shaft does not rotate or move due to the torsion force during operation.

[0071] The limiting assembly 12 comprises a tooth rod 121 fixedly connected with the side wall of the base 13, and a sliding rail 122 formed in the inner wall of the tooth rod 121.

[0072] When the driving assembly 21 extends outward, it will expand outward along the inner wall of the sliding rail 122, and as it moves outward, the torsion assembly 22 will rotate along the outer wall of the torsion assembly 22.

[0073] The driving assembly 21 comprises an electric telescopic rod 211 fixedly connected with the side wall of the base 13, an installation plate 212 fixedly connected with one end of the electric telescopic rod 211 away from the base 13, a side wall of the installation plate 212 is slidingly connected with the inner wall of the sliding rail 122, a limiting frame 213 is fixedly connected with the side wall of the installation plate 212, and a laser recorder 214 is fixedly connected with the top of the limiting frame 213.

[0074] When the gap in the driving shaft is too large, the torsion force generated by the torsion assembly 22 will force the driving shaft to rotate, and the laser recorder 214 will record the angle of rotation. After the extension is completely completed, the electric telescopic rod 211 will generate a contraction force again, at which time 244 will generate a reverse rotation, so that the bevel gear two 224 drives one end of the driving shaft to twist in the opposite direction, and the angle of twist is again accepted by the laser recorder 214, and the change of the gap to the torsion angle during the extension and contraction of the driving shaft is recorded, thereby improving the detection accuracy of the equipment.

[0075] The torsion assembly 22 comprises an L-shaped plate 221 fixedly connected at the side wall of the mounting plate 212, a gear 222 rotatably connected at the inner wall of the through hole of the L-shaped plate 221, an inclined gear one 223 fixedly connected at the side wall of the gear 222, and an inclined gear two 224 rotatably connected at the side wall of the mounting plate 212. In formal operation, the power supply of the electric telescopic rod 211 is turned on, so that the electric telescopic rod 211 is extended, and the extended electric telescopic rod 211 drives the mounting plate 212 and the limiting frame 213 to move outward along the inner wall of the slide rail 122. The outward movement of the mounting plate 212 drives the L-shaped plate 221 and the gear 222 to move outward synchronously, so that the driving shaft is changed from the state J of the middle J to the state H of the middle H. Figure 2

[0076] When the driving assembly 21 drives the torsion assembly 22 to move outward, the gear 222 is forced to rotate by the rack 121, and the rotating gear 222 forces the inclined gear two 224 to rotate.

[0077] The measuring assembly 31 comprises a rotating ring 313 rotatably connected at the inner wall of the limiting frame 213, a fixed head 311 fixedly connected at the inner wall of the rotating ring 313, a scale tooth 312 opened at the top of the fixed head 311, and a limiting tooth groove 314 opened at the inner wall of the rotating ring 313. The outward moving gear 222 is forced to rotate under the limitation of the rack 121, the rotating gear 222 drives the inclined gear two 224 to rotate about the connection point through the inclined gear one 223, the rotating inclined gear two 224 drives the rotating ring 313 to rotate in the same direction through the transmission assembly 32, and the rotating rotating ring 313 drives one end of the driving shaft to be twisted. However, the driving shaft cannot rotate due to the limitation of the clamping frame 111. If the fixed head 311 still rotates at this time, the angle is the clearance of the driving shaft. During the process, the laser recorder 214 records the change of the rotating angle of the clearance during the outward extension of the driving shaft by detecting the rotating angle of the scale tooth 312. Through the application of the above assemblies, the device can record the torsion angle caused by the clearance in real time, and the accuracy of the data is improved.

[0078] The rotating force of the inclined gear two 224 is transmitted to the limiting tooth groove 314 through the transmission assembly 32, and the limiting tooth groove 314 drives the fixed head 311 to be twisted.

[0079] ​The transmission assembly 32 comprises a driving disc 321 fixedly connected to the outer wall of the bevel gear two 224, ten sliding grooves 322 are arranged in the inner wall of the driving disc 321, ten obstruction blocks 323 are slidably connected to the inner wall of the sliding grooves 322, springs 324 are fixedly connected to the bottom of the obstruction blocks 323, and the ends, away from the obstruction blocks 323, of the springs 324 are fixedly connected to the inner wall of the sliding grooves 322. By means of the rotation of the bevel gear two 224, the transmission assembly 32 is arranged in the equipment. When the bevel gear two 224 rotates, the bevel gear two 224 drives the obstruction blocks 323 to roll along the inner wall of the limiting tooth groove 314 through the driving disc 321. When there is a gap in the driving shaft, the rotating force of the bevel gear two 224 is transmitted to the fixed head 311 through the driving disc 321 and the obstruction blocks 323, and the fixed head 311 rotates.

[0080] The outer wall of the driving disc 321 is in contact with the outer wall of the rotating ring 313, the outer wall of the bevel gear two 224 is meshed with the outer wall of the bevel gear one 223, and the outer wall of the gear 222 is meshed with the outer wall of the toothed rod 121. After the gap disappears or the rotation is completed, the driving shaft will no longer be twisted. If the driving assembly 21 continues to drive one end of the driving shaft to move outward, the fixed head 311 cannot rotate, but the bevel gear two 224 still rotates under the influence of the bevel gear one 223 and the gear 222. The rotating pressure is concentrated at the position of the obstruction blocks 323. With the increase of the pressure, the obstruction blocks 323 shrink, so that the driving disc 321 rotates. Through the application of the above-mentioned assembly, the excessive torsional force of the bevel gear two 224 is effectively offset, and the continuous torsion of the bevel gear two 224 is avoided, so that the deformation of the driving shaft is avoided.

[0081] When the number of rotations of the torsion assembly 22 increases and the driving shaft cannot be twisted again, the obstruction blocks 323 will shrink under pressure and offset the excess rotating pressure.

[0082] One specific application of the embodiment is that before use, the base 13 is fixed at the required position, the driving shaft is placed in the inner wall of the clamping frame 111, then the clamping assembly 11 is combined, and the buckle lock 112 is ensured to be in the locked state, so that the driving shaft cannot rotate or move due to external force, and then one end of the telescopic driving shaft is fixed in the inner part of the fixed head 311.

[0083] In formal work, the power supply of the electric telescopic rod 211 is turned on, so that the electric telescopic rod 211 is extended. The extended electric telescopic rod 211 drives the mounting plate 212 and the limiting frame 213 to move outward along the inner wall of the sliding rail 122. The outward moving mounting plate 212 drives the L-shaped plate 221 and the gear 222 to move outward synchronously, so that the driving shaft changes from the state of Figure 2 Figure 1 ​When the inner H is in the state, and the gear 222 is moved outward under the restriction of the toothed rod 121, the rotating gear 222 drives the bevel gear two 224 to rotate around the connection point as the center, the rotating bevel gear two 224 drives the rotating ring 313 to rotate in the same direction through the transmission assembly 32, and the rotating ring 313 drives the fixed head 311 to twist the one end of the drive shaft. However, the drive shaft cannot rotate due to the restriction of the clamping frame 111. If the fixed head 311 still rotates at this time, the angle is the clearance of the drive shaft. During this process, the laser recorder 214 records the change of the rotating angle of the scale tooth 312 caused by the clearance during the outward expansion of the drive shaft. Through the application of the above-mentioned assembly, the device can record the twisting angle caused by the clearance in real time, and improve the accuracy of the data.

[0084] By utilizing the rotating characteristics of the bevel gear two 224, the transmission assembly 32 is arranged in the device. When the bevel gear two 224 rotates, the bevel gear two 224 drives the blocking block 323 to roll along the inner wall of the limiting tooth groove 314 through the driving disc 321. When there is a gap in the drive shaft, the rotating force of the bevel gear two 224 is transmitted to the fixed head 311 through the driving disc 321 and the blocking block 323, and the fixed head 311 rotates. When the gap disappears or the rotation is completed, the drive shaft will not twist any more. If the drive assembly 21 continues to move the one end of the drive shaft outward, the fixed head 311 cannot rotate at this time, but the bevel gear two 224 still rotates under the influence of the bevel gear one 223 and the gear 222. The rotating pressure is concentrated at the position of the blocking block 323. With the increase of the pressure, the blocking block 323 will shrink, so that the driving disc 321 rotates. Through the application of the above-mentioned assembly, the excess twisting force of the bevel gear two 224 is effectively offset, and the continuous twisting of the bevel gear two 224 is avoided, so that the deformation of the drive shaft is avoided.

[0085] By utilizing the sliding characteristics of the blocking block 323, two groups of blocking blocks 323 are arranged in the device, and the two groups of blocking blocks 323 are designed to be staggered. When one group of blocking blocks 323 is in the compressed state, the other group of blocking blocks 323 is in the expanded state. Through the above design, when the blocking blocks 323 slide in the limiting tooth groove 314, the moving blocking blocks 323 will offset part of the vibration caused by the elastic potential energy, and reduce the influence of the internal vibration force on the laser recorder 214 when the blocking blocks 323 change.

[0086] After the extension is completed, the electric telescopic rod 211 will generate a contraction force again, at this time 244 will generate reverse rotation, so that the bevel gear 224 drives one end of the drive shaft to reverse twist, and the angle of the twist will be accepted by the laser recorder 214 again, and record the change of the gap to the twist angle during the extension to contraction process of the drive shaft, improve the detection accuracy of the equipment.

[0087] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the specification. The specification selects and describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A backlash detector for a constant velocity joint drive shaft assembly, characterized by, Also include: The fixed mechanism (1) has an installation space inside, which is used to install the fixed drive shaft; Drive mechanism (2) is installed on the side wall of the fixed mechanism (1), which provides driving force for the equipment, and is used for torsion test of the drive shaft; Transmission mechanism (3) is fixedly arranged on the side wall of the drive mechanism (2), which is used to convert the force generated by the drive mechanism (2) into the torsion force of the drive shaft; Before use, the drive shaft is clamped and limited on the top of the fixed mechanism (1), and the force generated by the drive mechanism (2) is converted into the torsion force of the drive shaft at any time through the transmission mechanism (3) to carry out the detection link; The inside of the fixed mechanism (1) includes a base (13); The fixed mechanism (1) includes a limiting assembly (12) fixedly arranged on the side wall of the base (13), which provides resistance when the drive mechanism (2) operates; The drive mechanism (2) includes a drive assembly (21) fixedly arranged on the side wall of the base (13), which provides power for the equipment; It also includes a torsion assembly (22); The limiting assembly (12) includes a tooth rod (121) fixedly connected to the side wall of the base (13), and a sliding rail (122) is formed in the inner wall of the tooth rod (121); The drive assembly (21) includes an electric telescopic rod (211) fixedly connected to the side wall of the base (13), one end of the electric telescopic rod (211) away from the base (13) is fixedly connected with a mounting plate (212), the side wall of the mounting plate (212) is slidably connected with the inner wall of the sliding rail (122), the side wall of the mounting plate (212) is fixedly connected with a limiting frame (213), and the top of the limiting frame (213) is fixedly connected with a laser recorder (214); When the gap in the drive shaft is too large, the torsion force generated by the torsion assembly (22) will force the drive shaft to rotate, and the laser recorder (214) will record the angle of torsion; The torsion assembly (22) includes an L-shaped plate (221) fixedly connected to the side wall of the mounting plate (212), a gear (222) rotatably connected to the inner wall of the through hole of the L-shaped plate (221), a bevel gear one (223) fixedly connected to the side wall of the gear (222), and a bevel gear two (224) rotatably connected to the side wall of the mounting plate (212); The transmission mechanism (3) includes: A measuring assembly (31) fixedly connected with the side wall of the drive assembly (21) for real-time detection of the torsion angle of the drive shaft; Transmission assembly (32), the side wall of the transmission assembly (32) is fixedly connected with the side wall of the torsion assembly (22), which is used to absorb excess torsion force; The measuring assembly (31) comprises a rotating ring (313) rotatably connected to the inner wall of the limiting frame (213), a fixed head (311) is fixedly connected to the inner wall of the rotating ring (313), a scale tooth (312) is formed in the top of the fixed head (311), and a limiting tooth groove (314) is formed in the inner wall of the rotating ring (313); The transmission assembly (32) comprises a driving disc (321) fixedly connected to the outer wall of the bevel gear two (224), ten sliding grooves (322) are formed in the inner wall of the driving disc (321), and ten blocking blocks (323) are slidably connected to the inner walls of the sliding grooves (322).

2. A backlash detector for a constant velocity joint drive shaft assembly according to claim 1, wherein: The fixing mechanism (1) comprises: The clamping assembly (11) is fixedly connected to the groove inner wall of the base (13), and is used for fixing and limiting the driving shaft; In use, the driving shaft is first clamped in the clamping assembly (11), and then the power supply of the driving mechanism (2) is turned on.

3. A backlash detector for a constant velocity joint drive shaft assembly according to claim 2, wherein: The side wall of the torsion assembly (22) is fixedly connected with the side wall of the driving assembly (21), and when the driving assembly (21) moves outward, the torsion assembly (22) is driven to move synchronously; When the torsion assembly (22) contacts the clamping assembly (11), the driving mechanism (2) will force the driving shaft to be elongated, and the torsion assembly (22) provides a torsion force, and the change of the torsion angle formed by the driving shaft with different elongation lengths is tested.

4. A backlash detector for a constant velocity joint drive shaft assembly according to claim 3, wherein: When the torsion assembly (22) provides a torsion force, it is transmitted to the measuring assembly (31) through the transmission assembly (32), and the measuring assembly (31) transmits the torsion force to the driving shaft.

5. A backlash detector for a constant velocity joint drive shaft assembly according to claim 4, wherein: The clamping assembly (11) comprises a clamping frame (111) fixedly connected to the groove inner wall of the base (13), and the clamping frame (111) is fixedly connected with the buckle lock (112) on the side wall; Before use, the driving shaft is placed in the inner wall of the clamping frame (111), then the clamping frame (111) is covered, and then the driving shaft is clamped by the buckle lock (112), so that the driving shaft will not rotate or move due to the torsion force during operation.

6. A backlash detector for a constant velocity joint drive shaft assembly according to claim 5, wherein: When the driving assembly (21) is elongated outward, it will expand outward along the inner wall of the sliding rail (122), and as it moves outward, the torsion assembly (22) will rotate along the outer wall of the torsion assembly (22).

7. A backlash detector for a constant velocity joint drive shaft assembly according to claim 6, wherein: When the driving assembly (21) drives the torsion assembly (22) to move outward, the tooth rod (121) will force the gear (222) to rotate, and the rotating gear (222) will force the bevel gear two (224) to rotate.

8. A backlash detector for a constant velocity joint drive shaft assembly according to claim 7, wherein: The rotating force of the bevel gear two (224) is transmitted to the limiting tooth groove (314) through the transmission assembly (32), and the limiting tooth groove (314) twists the fixed head (311).

9. A backlash detector for a constant velocity joint drive shaft assembly according to claim 8, wherein: The bottom of the ten blocking blocks (323) is fixedly connected with a spring (324), and the end of the spring (324) away from the blocking block (323) is fixedly connected with the inner wall of the sliding groove (322); The outer wall of the driving disc (321) is in contact with the outer wall of the rotating ring (313), the outer wall of the bevel gear two (224) is in meshing connection with the outer wall of the bevel gear one (223), and the outer wall of the gear (222) is in meshing connection with the outer wall of the toothed rod (121).

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