A strength detection device for composite cover cloth triangular belt

Abstract

The application discloses a kind of strength detection devices of composite wrapping cloth triangular belt, it is related to triangular belt strength detection technical field, including box, the front end of box is equipped with the protective baffle for closure protection, the top surface of box is equipped with mounting groove, the side wall of mounting groove is fixedly connected with fixed transmission box, the side wall of fixed transmission box is equipped with hydraulic cylinder, the hydraulic cylinder of the hydraulic rod that projects is connected with transmission motor box, guiding rod is horizontally transversely equipped in mounting groove, two triangular belt placing mechanisms are installed in the bottom of mounting groove, the front end of box is vertically equipped with limit slot, the front end of box is horizontally equipped with sliding slot in middle part, the setting of protective baffle can better protect detection personnel, avoid triangular belt to break down and injure staff, the setting of hydraulic cylinder can better control the pressure that triangular belt is detected, so that detection data is more accurate, the setting of pressure block can detect the pressure capacity of belt, facilitate to detect unqualified triangular belt.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of V-belt strength detection, and particularly relates to a strength detection device for composite cover V-belt. BACKGROUND

[0002] The V-belt has two structures of a special belt core and a rope core, and is composed of cover cloth, top glue, tensile body and bottom glue. The V-belt with the rope core structure is convenient to manufacture, has general tensile strength, is low in price and is widely applied. The V-belt with the special belt core structure has good toughness and high strength, and is suitable for occasions with high speed. The V-belt needs to be detected in tensile strength before use.

[0003] At present, the detection is generally performed by a manual and mechanical cooperation method. The V-belt is applied with force by equipment, and the deformation of the V-belt is observed. This detection form is static detection, cannot well simulate the working condition of the V-belt, and is single in detection data. When other data is detected, repeated operation reduces the accuracy and increases the detection time. The working wear condition and service life of the V-belt need to be detected by separate equipment, thereby increasing the detection cost. Therefore, the present application designs the strength detection device for composite cover V-belt to solve the above problems. SUMMARY

[0004] The present application aims at solving the problems in the prior art and provides a strength detection device for composite cover V-belt.

[0005] In order to achieve the above object, the present application adopts the following technical scheme: a strength detection device for composite cover V-belt, comprising a box body, a protective baffle for closure and protection is arranged at the front end of the box body, a mounting groove is arranged on the top surface of the box body, a fixed transmission box is fixedly connected to the side wall of the mounting groove, a hydraulic cylinder is arranged on the side wall of the fixed transmission box, a transmission motor box is connected to the hydraulic rod of the hydraulic cylinder, four guide rods for sliding of the transmission motor box are horizontally arranged in the mounting groove, two V-belt placing mechanisms are arranged on the bottom of the mounting groove, two limiting grooves for cooperation and connection with the V-belt placing mechanisms are vertically arranged on the front end of the box body, and a sliding groove is horizontally arranged on the middle part of the front end of the box body. A polishing mechanism for accelerating the wear of the V-belt is arranged on the upper part of the sliding groove of the front end wall of the box body, a wear detection mechanism for detecting the wear condition of the V-belt is arranged on the lower part of the sliding groove of the front end wall of the box body, a pressure receiving block for extruding the V-belt is fixedly connected to the side wall of the mounting groove of the box body, and a placing groove matched with the shape of the side end of the V-belt is arranged on the side end of the pressure receiving block.

[0006] Preferably, a rotating shaft is arranged on the fixed transmission box, a belt pulley for placing the V-belt is mounted on the rotating shaft, a positioning block is equidistantly arranged on the rear part of the rotating shaft, a fixed groove for limiting the positioning block is arranged on the belt pulley, a positioning nut is mounted on the end of the rotating shaft, a hole for mounting the loose pin is arranged on the positioning nut, an infrared distance sensor is mounted on the side wall of the transmission motor box, and a reflecting sheet is mounted on the side wall of the fixed transmission box.

[0007] Preferably, the V-belt placing mechanism is composed of a supporting sliding rod and a lifting box, the lifting box is provided with a lifting rod at the top, the motor box is fixedly connected to the top end of the lifting rod, gear grooves are equidistantly arranged on the top surface of the rear part of the supporting sliding rod, a transmission gear is arranged in the motor box at the top of the lifting rod and is in meshing connection with the gear grooves, and the supporting sliding rod slides in the limiting groove.

[0008] Preferably, the polishing mechanism is composed of a polishing block and a lifting transmission box, a gear groove is arranged on the vertical rod at the rear part of the polishing block, a transmission motor is arranged in the lifting transmission box and is used for driving the polishing block to adjust the height, and a polishing slot is arranged on the top surface of the polishing block and is matched with the V-belt.

[0009] Preferably, the wear detection mechanism comprises a fixed block, a movable block and a limiting knob, the limiting knob is mounted on the top of the fixed block, a clamping block is connected to the end of the limiting knob, a guide column is vertically fixedly connected to the top of the movable block, and a clamping groove is arranged on the lower part of the guide column and is matched with the clamping block.

[0010] Preferably, a movable column is fixedly connected to the middle of the top surface of the movable block, a first gear groove is arranged on the rear part of the movable column, an active knob is arranged on the side end of the top of the fixed block, a first gear is connected to the end of the active knob and is in meshing connection with the first gear groove, and a first scale groove is arranged on the side wall of the movable column and is used for measuring the height change of the V-belt.

[0011] Preferably, a T-shaped groove is arranged on the bottom surface of the movable block, two clamping blocks are symmetrically mounted in the T-shaped groove, a first spring is connected to the rear part of the clamping block, the first spring is in abutment with the inner side end of the T-shaped groove and pushes the clamping block to be in close contact, and a second scale groove is arranged on the bottom surface of the movable block and is used for detecting the close contact degree of the clamping block.

[0012] Preferably, the clamping block comprises a rotating knob, a movable plate and a transmission block, a handle is connected to the rotating knob, an L-shaped retreat rod is connected to the end of the handle, a baffle is arranged in the middle of the handle, a second spring is sleeved on the handle in front of the baffle, a spline block for positioning is connected to the other side of the baffle, the transmission block is in meshing connection with the movable plate, two protruding rods are arranged on the side end of the transmission block, and a torsional spring is sleeved on the protruding rod located at the center of the transmission block.

[0013] Preferably, the clamping surface of the movable plate is provided with a circular groove, and a ball is installed in the circular groove and partially protrudes from the circular groove to be in contact with the V-belt.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] 1、The protective baffle is arranged, so that the detection personnel can be better protected, and the V-belt is prevented from breaking and damaging the workers, the hydraulic cylinder is arranged, so that the pressure borne by the V-belt during detection can be better controlled, and the detection data is more accurate, the pressure block is arranged, so that the pressure bearing capacity of the V-belt can be detected, and the unqualified V-belt can be detected, the positioning device and the positioning nut on the pulley and the rotating shaft are arranged, so that the pulley can be better fixed, and the detection of the V-belt is not affected by loosening or shaking of the pulley during rotation, the infrared distance measuring sensor and the reflecting sheet are arranged, so that the length of the V-belt and the length change when the V-belt is loaded can be detected, the V-belt placing mechanism is arranged, so that the V-belt can be better taken and placed, the installation space of the V-belt is not limited by the protective baffle, and the V-belt is not inconvenient to install, and the grinding mechanism is arranged, so that the wear detection time of the V-belt can be accelerated, and the detection efficiency of the V-belt is improved.

[0016] 2、The wear detection mechanism is arranged, so that the wear condition can be better detected, and the quality of the V-belt can be determined, the movable knob is arranged, so that the detection device can be conveniently lifted and reset, the first scale groove is arranged, so that the height wear condition of the V-belt can be better observed and recorded, the first spring is arranged, so that the clamping block can automatically clamp the V-belt, and the data of the detection device is more accurate, the second width groove is arranged, so that the clamping change of the clamping block can be conveniently observed, the rotating knob and the transmission block are arranged, so that the clamping tightness of the movable plate on the V-belt can be better controlled, the V-belt is clamped by the movable plate, or the angle of the movable plate is kept as a reference, the balls in the movable plate are arranged, so that the wear of the V-belt by the detection device can be reduced, the variable during detection can be controlled, and additional wear is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application, and do not limit the present application. In the drawings:

[0018] Figure 1 It is a front end perspective structure schematic view of the present application;

[0019] Figure 2 It is an upper part perspective structure schematic view of the present application;

[0020] Figure 3 It is a belt placing device perspective structure schematic view of the present application;

[0021] Figure 4 This is a three-dimensional structural diagram of the front end of the box body of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the upper part of the box body of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the positioning nut of the present invention;

[0024] Figure 7 This is a three-dimensional structural diagram of the triangular belt placement mechanism of the present invention;

[0025] Figure 8 This is a three-dimensional structural diagram of the grinding and testing device of the present invention;

[0026] Figure 9 This is a three-dimensional structural diagram of the upper part of the grinding and testing device of the present invention;

[0027] Figure 10 This is a schematic diagram of the three-dimensional structure of the clamping block of the present invention;

[0028] Figure 11 This is a three-dimensional structural diagram of the rotating plate movable device of the present invention;

[0029] Figure 12 This is a three-dimensional structural diagram of the grinding mechanism of the present invention;

[0030] Figure 13 This is a three-dimensional structural diagram of the limiting knob of the present invention.

[0031] The components in the diagram are numbered as follows: 1. Protective baffle; 2. Housing; 3. Grinding mechanism; 4. Wear detection mechanism; 5. Fixed transmission box; 6. Hydraulic cylinder; 7. Transmission motor box; 8. V-belt placement mechanism; 9. Slide groove; 10. Limiting groove; 11. Pressure block; 12. Guide rod; 13. Infrared ranging sensor; 14. Positioning nut; 15. Supporting slide rod; 16. Lifting box; 17. Fixed block; 18. Movable block; 19. Limiting knob; 20. Movable knob; 21. Movable column; 22. Clamping block; 23. Rotating knob; 24. Movable plate; 25. Transmission block; 26. Grinding block; 27. Lifting transmission box; 28. Guide column. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Example: See Figures 1 to 13A strength testing device for composite fabric-covered V-belts includes a housing 2. The front end of the housing 2 is equipped with a protective baffle 1 for enclosure and protection. A mounting groove is formed on the top surface of the housing 2. A fixed transmission box 5 is fixedly connected to the side wall of the mounting groove. A hydraulic cylinder 6 is mounted on the side wall of the fixed transmission box 5. A transmission motor box 7 is connected to the hydraulic rod extending from the hydraulic cylinder 6. Four guide rods 12 are horizontally arranged in the mounting groove for sliding of the transmission motor box 7. Two V-belt placement mechanisms 8 are installed at the bottom of the mounting groove. Two limiting grooves 10 are vertically formed at the front end of the housing 2 for connecting with the V-belt placement mechanisms 8. A sliding groove 9 is horizontally formed in the middle of the front end of the housing 2. Through the setting of the protective baffle 1, it is possible to... To better protect testing personnel and prevent injury from broken V-belts, the hydraulic cylinder 6 allows for better control of the pressure on the V-belt during testing, resulting in more accurate test data. A grinding mechanism 3 for accelerating V-belt wear is installed on the upper part of the sliding groove 9 on the front wall of the housing 2, while a wear detection mechanism 4 for detecting V-belt wear is installed on the lower part of the sliding groove 9. A pressure block 11 for compressing the V-belt is fixed to the side wall of the mounting groove in the housing 2. The side end of the pressure block 11 has a placement groove that matches the shape of the V-belt's side end. The pressure block 11 allows for testing the belt's compressive strength, facilitating the detection of substandard V-belts.

[0034] In this invention, a rotating shaft is rotatably mounted on the fixed transmission box 5. A pulley for holding a V-belt is mounted on the rotating shaft. Positioning blocks are equidistantly protruding from the rear of the rotating shaft. A fixing groove is provided on the pulley to cooperate with and limit the positioning of the positioning block. A positioning nut 14 is installed at the end of the rotating shaft. The positioning nut 14 has a hole for installing a release pin. An infrared ranging sensor 13 is mounted on the side wall of the transmission motor box 7. The infrared ranging sensor 13 is model GP2Y0A21YK. The infrared ranging sensor 13 has a pair of infrared signal emitting and receiving diodes. The emitting diode emits an infrared signal of a specific frequency, and the receiving diode receives this infrared signal. When the infrared detection direction encounters an obstacle, the infrared signal is reflected back and received by the receiving diode. After processing, the signal is returned to the control panel of the control device through the digital sensor interface, thus measuring the change in distance. A reflector plate is installed on the wall to cooperate with the infrared ranging sensor 13. The positioning device and positioning nut 14 on the pulley and the shaft can better fix the pulley and prevent the pulley from loosening or shaking during rotation, which would affect the detection of the V-belt. The infrared ranging sensor 13 and the reflector plate can detect the length of the V-belt and the change in length under load. The V-belt placement mechanism 8 consists of a supporting slide rod 15 and a lifting box 16. The top of the lifting box 16 is equipped with a lifting rod, and the top of the lifting rod is fixed to a motor box. The rear top surface of the supporting slide rod 15 is provided with gear grooves at equal intervals. The motor box at the top of the lifting rod is equipped with a transmission gear that meshes with the gear grooves. The supporting slide rod 15 slides in the limiting groove 10. The V-belt placement mechanism 8 can better pick up and put down the V-belt and avoid the protective baffle 1 restricting the installation space of the V-belt, which would make the V-belt inconvenient to install.

[0035] In this invention, the grinding mechanism 3 consists of a grinding block 26 and a lifting transmission box 27. A gear groove is provided on the vertical rod at the rear of the grinding block 26. A transmission motor is installed inside the lifting transmission box 27 to drive the grinding block 26 to adjust its height. A grinding groove for cooperating with the V-belt is provided on the top surface of the grinding block 26. By setting up the grinding mechanism 3, the wear detection time of the V-belt can be accelerated, and the detection efficiency of the V-belt can be improved. The wear detection mechanism 4 includes a fixed block 17, a movable block 18, and a limiting knob 19. The limiting knob 19 is installed on the top of the fixed block 17, and a locking block is connected to the end of the limiting knob 19. A guide post 28 is vertically fixed to the top of the movable block 18. The lower part has a locking groove that cooperates with the locking block for fixation. With the setting of the wear detection mechanism 4, the wear condition can be better detected and the quality of the V-belt can be judged. The movable block 18 has a movable column 21 fixedly connected to the middle of the top surface. The movable column 21 has a first gear groove at the rear. The fixed block 17 has a movable knob 20 at the top side end. The end of the movable knob 20 is connected to a first gear that meshes with the first gear groove. The movable column 21 has a first scale groove on the side wall for measuring the height change of the V-belt. With the setting of the movable knob 20, the detection device can be easily raised and reset. With the setting of the first scale groove, the height wear condition of the V-belt can be better observed and recorded.

[0036] In this invention, the bottom surface of the movable block 18 is provided with a T-shaped groove, in which two clamping blocks 22 are symmetrically installed. A first spring is connected to the rear of each clamping block 22. The first spring abuts against the inner end of the T-shaped groove, pushing the clamping block 22 into contact. The bottom surface of the movable block 18 is provided with a second scale groove for detecting the degree of contact of the clamping blocks 22. The first spring enables the clamping blocks 22 to automatically clamp the V-belt, making the data of the detection device more accurate. The second width groove facilitates the observation of the clamping changes of the clamping blocks 22. The clamping block 22 includes a rotating knob 23, a movable plate 24, and a transmission block 25. A handle is connected to the rotating knob 23, and an L-shaped crank is connected to the end of the handle. A baffle is provided in the middle of the handle, and the handle at the front end of the baffle is... A second spring is sleeved on the baffle, and a spline block for positioning is connected to the other side of the baffle. The transmission block 25 is engaged with the movable plate 24. Two protruding rods are provided on the side end of the transmission block 25. A torsion spring is sleeved on the protruding rod located at the center of the transmission block 25. By rotating the knob 23 and the setting of the transmission block 25, the clamping tightness of the movable plate 24 on the V-belt can be better controlled, so that the movable plate 24 clamps the V-belt, or maintains the angle of the movable plate 24 as a reference. A circular groove is opened on the clamping surface of the movable plate 24, and a ball is installed in the circular groove. The ball part protrudes from the circular groove and fits against the V-belt. The ball in the movable plate 24 can reduce the wear of the V-belt by the detection device, facilitate the control of variables during detection, and avoid additional wear.

[0037] Working principle: In this embodiment, the present invention also proposes a method for using a strength testing device for composite-covered triangular belts, including the following steps:

[0038] Step 1: First, power is turned on to the strength testing device for the composite fabric-covered V-belt. Then, the motor box at the top of the V-belt placement mechanism 8 drives the supporting slide rod 15 to move forward to support the V-belt. The two supporting slide rods 15 can better support the V-belt and prevent the V-belt from shaking during movement. The V-belt stops at the pulley groove. Then, the two pulleys separate under the drive of the hydraulic cylinder 6. The supporting slide rod 15 slides down under the action of the lifting box 16 until the V-belt is completely installed on the pulley.

[0039] Step 2: The infrared ranging sensor 13 installed on the transmission motor box 7 and the reflector on the fixed transmission box 5 can detect the distance between the two transmission boxes in real time, so as to better observe the length of the V-belt. The hydraulic cylinder 6 and the infrared ranging sensor 13 are set up to display the pressure and length change of the V-belt in real time, and can more intuitively detect the strength of the V-belt. Then, adjust the lifting transmission box 27 to make the grinding block 26 fit with the inner side of the V-belt, and then release the limit knob 19 to lower the movable block 18, so that the movable plate 24 at the bottom of the wear detection mechanism 4 fits with the inner side of the V-belt.

[0040] Step 3: After the movable plate 24 is in contact with the inner side of the V-belt, adjust the detection mode by rotating the knob 23. In normal mode, the crank at the end of the knob 23 presses the torsion spring, causing the transmission block 25 to drive the movable plate 24 to be pressed against the side end face of the V-belt. This allows the movable plate 24 to change with the change of the V-belt's grinding angle. In control mode, one end of the movable block 18 is operated in the same way as above, while the other end of the movable block 18 is rotated in the opposite direction by rotating the knob 23 so that the crank abuts against the protrusion of the transmission block 25. This prevents the movable plate 24 from always being in contact with the side of the V-belt due to gravity. The spline block and the second spring on the knob 23 can better cooperate to fix the knob 23 and prevent the knob 23 from rotating with the movable plate 24. Then, record the parameters before the strength test. The wear condition of the side end face of the V-belt is detected by the deflection angle of the movable plate 24 in normal mode. The changes in the side end face of the V-belt before and after wear are observed by the control mode.

[0041] Step four: Next, turn on the switch of the transmission motor box 7 to drive the pulley to rotate. The V-belt rotates with the pulley, and the grinding mechanism 3 on the upper inner side of the V-belt comes into contact with it. The height of the grinding block 26 is higher than the normal rotation height of the V-belt, so that the grinding groove of the grinding block 26 fits tightly with the V-belt. The grinding block 26 of the grinding mechanism 3 has a V-belt groove with a large degree of roughness. The wear of the V-belt is simulated by sliding contact with the V-belt. This simulation can reduce the test time and facilitate the testing of multiple V-belts. The movable plate 24 of the wear detection mechanism 4 is equipped with rotating balls to reduce friction. The ball bearings can reduce wear. The wear detection mechanism 4 can avoid the wear simulation of the V-belt being affected by the detection device. The movable block 18 is in a free fall state. By changing the first scale groove on the movable block 18, the wear of the inner and outer diameters of the transverse cross section of the V-belt can be observed. If wear occurs, the movable block 18 will fall, causing the position of the first scale groove to change. The two clamping blocks 22 are pushed by the first spring at the rear to press the bottom end of the side end face of the V-belt, thereby detecting the width of the lower end of the transverse cross section of the V-belt. The two clamping blocks 22 are clamped and the wear is observed through the second scale groove at the lower end of the side of the movable block 18.

[0042] Step five, finally, during the destructive testing, the broken V-belt can be placed on the pressure block 11 of the protruding cover plate to test the material condition of the cross section. The pressure block 11 has a trapezoidal slot to facilitate the insertion of the broken V-belt. The hydraulic cylinder 6 inside the slot drives the transmission motor box 7 to press the broken V-belt. The controlled hydraulic cylinder 6 can better adjust the pressing pressure, which is convenient for accurately testing the strength of the V-belt. Then, the quality of the V-belt is judged by experimental data. Then, the two pulleys approach the V-belt placement mechanism 8 to remove the V-belt, and the operation of the device ends.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A strength detection device for a composite cover V-belt, comprising a box (2), characterized in that: The front end of the box (2) is provided with a protective baffle (1) for closing and protection, a mounting groove is formed in the top surface of the box (2), a fixed transmission box (5) is fixedly connected to the side wall of the mounting groove, a hydraulic cylinder (6) is mounted on the side wall of the fixed transmission box (5), a transmission motor box (7) is connected to the hydraulic rod of the hydraulic cylinder (6), four guide rods (12) for sliding of the transmission motor box (7) are horizontally arranged in the mounting groove, two triangular belt placing mechanisms (8) are mounted at the bottom of the mounting groove, two limiting grooves (10) are vertically arranged at the front end of the box (2) and are used for cooperation and connection with the triangular belt placing mechanisms (8), and a sliding groove (9) is horizontally arranged at the middle of the front end of the box (2); The upper part of the sliding groove (9) of the front end wall of the box (2) is provided with a polishing mechanism (3) for accelerating the wear of the triangular belt, the lower part of the sliding groove (9) of the front end wall of the box (2) is provided with a wear detection mechanism (4) for detecting the wear condition of the triangular belt, the side wall of the mounting groove of the box (2) is fixedly connected with a pressure block (11) for extruding the triangular belt, and the side end of the pressure block (11) is provided with a placing groove matched with the shape of the side end of the triangular belt; The wear detection mechanism (4) comprises a fixed block (17), a movable block (18) and a limiting knob (19), the limiting knob (19) is mounted on the top of the fixed block (17), the end of the limiting knob (19) is provided with a clamping block, the top of the movable block (18) is vertically fixedly connected with a guide column (28), and the lower part of the guide column (28) is provided with a clamping groove matched with the clamping block; The top surface of the movable block (18) is fixedly connected with a movable column (21), the rear part of the movable column (21) is provided with a first gear groove, the top of the fixed block (17) is provided with a movable knob (20), the end of the movable knob (20) is provided with a first gear engaged with the first gear groove, and the side wall of the movable column (21) is provided with a first scale groove for measuring the height change of the triangular belt; The bottom surface of the movable block (18) is provided with a T-shaped groove, two clamping blocks (22) are symmetrically mounted in the T-shaped groove, the rear part of the clamping block (22) is provided with a first spring, the first spring is abutted to the inner side end of the T-shaped groove to push the clamping block (22) to be attached, and the bottom surface of the movable block (18) is provided with a second scale groove for detecting the attachment degree of the clamping block (22); The clamping block (22) comprises a rotating knob (23), a movable plate (24) and a transmission block (25), the rotating knob (23) is connected with a handle, the end of the handle is provided with an L-shaped retreat rod, the handle is provided with a baffle in the middle, the handle of the front end of the baffle is sleeved with a second spring, the other side of the baffle is provided with a spline block for positioning, the transmission block (25) is engaged with the movable plate (24), two convex rods are protrusively arranged at the side end of the transmission block (25), and a torsional spring is sleeved on the convex rod located at the center of the transmission block (25); A circular groove is formed in the clamping surface of the movable plate (24), and a ball is mounted in the circular groove.

2. The strength detection device of a composite cover fabric V-belt according to claim 1, characterized in that: The fixed transmission box (5) is provided with a rotating shaft, the rotating shaft is provided with a belt pulley for placing a triangular belt, the rear part of the rotating shaft is provided with a positioning block, the belt pulley is provided with a fixed slot for limiting the positioning block, the end of the rotating shaft is provided with a positioning nut (14), the positioning nut (14) is provided with a hole for installing a loose pin, the side wall of the transmission motor box (7) is provided with an infrared distance sensor (13), and the side wall of the fixed transmission box (5) is provided with a reflecting sheet matched with the infrared distance sensor (13).

3. A device for detecting the strength of a composite cover belt V-belt according to claim 2, characterized in that: The triangular belt placing mechanism (8) is composed of a supporting sliding rod (15) and a lifting box (16), the lifting box (16) is provided with a lifting rod at the top, the top end of the lifting rod is fixedly connected with a motor box, the rear top surface of the supporting sliding rod (15) is provided with a gear slot at equal intervals, the motor box at the top of the lifting rod is provided with a transmission gear meshed and connected with the gear slot, and the supporting sliding rod (15) slides in the limiting slot (10).

4. The strength detection device of a composite cover fabric V-belt according to claim 3, characterized in that: The polishing mechanism (3) is composed of a polishing block (26) and a lifting transmission box (27), the vertical rod at the rear part of the polishing block (26) is provided with a gear slot, the lifting transmission box (27) is provided with a transmission motor for driving the polishing block (26) to adjust the height, and the top surface of the polishing block (26) is provided with a polishing slot matched with the triangular belt.

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