Variable-diameter belt pulley capable of adjusting torque

Abstract

The invention provides a variable-diameter belt pulley capable of adjusting torque, and relates to the field of belt pulleys. The variable-diameter belt pulley capable of adjusting the torque comprises a pulley body and a power input shaft, a pulley outer diameter mechanism is arranged on the surface of the pulley body, the pulley outer diameter mechanism comprises a belt groove in sliding connection with the pulley body, and a torque adjusting mechanism is arranged in the middle of the pulley body. The torque adjusting mechanism comprises a first connecting disc, a second connecting disc and a threaded ring, and the middle of the threaded ring is in threaded connection with an adjusting rotary disc. According to the variable-diameter belt pulley capable of adjusting the torque, a first connecting disc and a second connecting disc abut against each other, a power input shaft drives a threaded ring to rotate, then a pulley body and a belt groove drive a belt to be transmitted, the meshing strength between the first connecting disc and the second connecting disc is adjusted by adjusting a rotary disc, and then torsion of the belt pulley is adjusted; and the power equipment is prevented from being damaged when the load is too large, and the operation stability and safety of the power equipment are improved.

Description

Technical Field

[0001] The invention relates to a pulley, in particular to a variable diameter pulley for adjusting torque, and belongs to the technical field of pulleys. Background Art

[0002] Pulleys are disk-hub parts. They are generally relatively large in size and are manufactured by casting and forging. Generally, larger designs are cast, and the material is usually cast iron. Pulleys are mainly used in situations where power is transmitted over long distances, such as the output of small diesel engine power, air compressors, reducers, speed reducers, generators, cotton gins, etc.

[0003] The invention with patent number CN215806164U discloses a variable diameter pulley, which belongs to the technical field of pulleys and includes a pulley body. The pulley body includes a mounting cylinder, a guide cylinder and a working cylinder from the inside to the outside. The mounting cylinder is provided with an axial hole along its axial direction. The mounting cylinder is provided with a plurality of disks at intervals along its axial direction. When the push rod moves away from the mounting cylinder, the end of the push rod will support the inner wall of the working cylinder. The present invention has the advantage of simply and quickly changing the diameter of the pulley by only replacing the working cylinder.

[0004] When the pulley outputs power, a variable diameter pulley is used to provide more power options. Although the pulley in the above patent is convenient for changing the wheel diameter, the output torque is constant. When the wheel diameter becomes larger, the output torque of the pulley will increase. If the pulley torque cannot be reduced, when the pulley load changes too much, it is easy to cause damage to the power mechanism and the belt. For this reason, we provide a variable diameter pulley with adjustable torque to solve the above problems.

[0005] In addition, there is a lack of a wider torque adjustment range, and the fixed structure lacks a reliable locking method, which makes the connection structure easy to loosen when in use or facing vibration. Summary of the invention

[0006] 1. Technical issues to be solved

[0007] The purpose of the present invention is to provide a variable diameter pulley for adjusting torque in order to solve the above-mentioned problem, so as to solve the problem that the torque of the pulley is difficult to change in the reference document.

[0008] (II) Technical solution

[0009] The present invention is achieved through the following technical solution: a variable diameter pulley for adjusting torque.

[0010] It includes a wheel body and a power input shaft, a wheel outer diameter mechanism is arranged on the surface of the wheel body, the wheel outer diameter mechanism includes a belt groove slidably connected to the wheel body, a torque adjustment mechanism is arranged in the middle of the wheel body, the torque adjustment mechanism includes a first connecting disk, a second connecting disk and a threaded ring, the middle thread of the threaded ring is connected with an adjusting dial, the internal rotation of the adjusting dial is connected with a second telescopic spring, and the second telescopic spring is fixedly connected to the second connecting disk, a fixed groove is opened inside the belt groove, a sliding clamp rod is slidably connected inside the wheel body, and one end of the sliding clamp rod is plugged into the fixed groove, the sliding clamp rod is inserted into the fixed groove, and the belt groove is fixed to the surface of the wheel body, and a locking structure is also included.

[0011] Preferably, the locking structure includes locking rod 1 and locking rod 2. A horizontal hole is arranged in the pulling rod, and a vertical hole is arranged in the sliding clamping rod. The vertical hole is communicated with the horizontal hole. A plurality of clamping holes 1 are penetrated on the inner side wall of the vertical hole, and a plurality of clamping holes 2 are arranged on the inner wall of the fixed groove. Locking rod 1 is slidably arranged in the horizontal hole, and locking rod 2 is hingedly connected to one or more connecting rods. The ends of the connecting rods are hingedly connected to the clamping rods, and the clamping rods are arranged in the clamping hole 1. Locking rod 1 is connected to locking rod 2 through a transmission structure, and the left and right movement of locking rod 1 drives locking rod 2 to move up and down.

[0012] Preferably, the transmission structure includes gear one, which is rotatably arranged in the vertical hole, a rack one is arranged at the lower left end of locking rod one, and a rack two is arranged at the upper right end of locking rod two, and both rack one and rack two are engaged with gear one.

[0013] Preferably, an auxiliary locking structure is also included, the auxiliary locking structure includes a clamping part, a plurality of one-way clamping teeth 1 are arranged on the upper side of the locking rod 1, the vertical part of the one-way clamping tooth 1 is arranged on the right side, and the inclined part is arranged on the left side, a groove 2 is arranged on the upper side of the horizontal hole, a clamping part is slidingly arranged in the groove 2, a spring 3 is arranged between the clamping part and the groove 2, the clamping part is provided with a plurality of one-way clamping teeth 2, and the one-way clamping teeth 2 cooperate with the one-way clamping teeth 1 to realize one-way clamping of the locking rod 1.

[0014] Preferably, a pulling rod is fixedly connected to the surface of the sliding card rod, and the pulling rod is slidably connected to the wheel body, and a first telescopic spring is fixedly connected to the inside of the sliding card rod, and the first telescopic spring is fixedly connected to the wheel body, and the first telescopic spring makes the sliding card rod more stable when inserted into the fixed groove through the first telescopic spring.

[0015] Preferably, the surface of the power input shaft is rotatably connected with a fixed bearing, and the fixed bearing is fixedly connected to the wheel body, the first connecting plate is fixedly connected to the power input shaft, and the first connecting plate is adapted to the second connecting plate, and the stability of the power input shaft operation is improved by fixing the bearing.

[0016] Preferably, a sliding column is fixedly connected to the middle of the first connecting disk, a sliding groove is opened in the middle of the second connecting disk, and the sliding column is slidably connected to the sliding groove, so that the stability of the engagement between the first connecting disk and the second connecting disk is improved.

[0017] Preferably, the threaded ring is fixedly connected to the wheel body, a linkage groove is provided inside the threaded ring, a linkage block is slidably connected inside the linkage groove, and the linkage block is fixedly connected to the second connecting disk, and the second connecting disk drives the wheel body to rotate through the linkage block.

[0018] Preferably, a pointer is fixedly connected to the surface of the wheel body, and a scale is fixedly connected to the surface of the adjustment dial, so that the magnitude of the adjustment torque value can be known in real time through the pointer and the adjustment dial.

[0019] Preferably, a slot is provided on the surface of the adjusting dial, and a plug rod is slidably connected to the surface of the wheel body, and one end of the plug rod is plugged into the slot, and the position of the adjusting dial is fixed by inserting the plug rod into the slot.

[0020] The present invention provides a torque-adjustable variable diameter pulley, which has the following beneficial effects:

[0021] 1. The torque-adjustable variable diameter pulley drives the belt groove to rotate through the wheel body, and the belt groove drives the equipment to rotate through the belt, so that the pulley can meet a variety of power transmission options and improve the stability of the pulley operation. The first connecting disk and the second connecting disk conflict with each other, so that the power input shaft drives the threaded ring to rotate, and then the wheel body and the belt groove drive the belt to transmit. The pressure of the second telescopic spring on the second connecting disk is adjusted by rotating the adjusting dial inside the threaded ring, thereby controlling the meshing force between the first connecting disk and the second connecting disk, and adjusting the torsion of the pulley to avoid damage to the power equipment when the load is too large, thereby improving the stability and safety of the power equipment operation.

[0022] 2. The variable diameter pulley for adjusting the torque is inserted into the fixed groove by the sliding card rod, and the belt groove is fixed on the surface of the wheel body, so as to improve the stability of the operation of the belt groove. The first telescopic spring provides thrust to the sliding card rod, so that the insertion of the sliding card rod into the fixed groove is more stable. The pulling rod is convenient to pull the sliding card rod, so as to reduce the difficulty of replacing the belt groove and improve the efficiency of replacing the belt grooves of different wheel diameters. The power input shaft is fixed by the fixed bearing to improve the stability of the operation of the power input shaft. The running position of the second connecting disk is fixed by the sliding column and the sliding groove to improve the stability of the engagement between the first connecting disk and the second connecting disk. The linkage block is fixed by the linkage groove, and the second connecting disk drives the wheel body to rotate by the linkage block, so as to improve the stability of the operation of the device. The maximum torque provided by the device is understood by the pointer and the adjusting dial, so as to improve the efficiency of the device in adjusting the torque. The position of the adjusting dial is fixed by inserting the rod into the card slot to avoid the rotation of the adjusting dial caused by the vibration of the equipment, so as to improve the stability of the operation of the adjusting dial.

[0023] 3. A locking structure and an auxiliary locking structure are provided to prevent the sliding clamping rod from loosening, thereby making the connection of the variable diameter pulley more reliable.

[0024] 4. By setting two telescopic springs, the two telescopic springs can be connected in series to better adjust the torque without having to constantly replace the springs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic cross-sectional view of the torque adjustment mechanism structure of the present invention;

[0027] Figure 3 It is an exploded schematic diagram of the torque adjustment mechanism structure of the present invention;

[0028] Figure 4 For the present invention Figure 1 A magnified view of the structure of part A;

[0029] Figure 5 This is a schematic diagram of the locking structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the adjustment knob of the present invention;

[0031] Figure 7 It is a schematic diagram of the anti-escape mechanism of the present invention.

[0032]

Main component symbol description

[0033] 1. Wheel body; 2. Power input shaft;

[0034] 3. Wheel outer diameter mechanism; 301. Belt groove; 302. Fixed groove; 303. Sliding lever; 304. Pulling lever; 305. First telescopic spring;

[0035] 4. Torque adjustment mechanism; 401. First connecting plate; 402. Second connecting plate; 403. Sliding column; 404. Sliding groove; 405. Threaded ring; 406. Linking groove; 407. Linking block; 408. Adjusting dial; 409. Second telescopic spring; 410. Fixed bearing; 411. Pointer; 412. Scale plate; 413. Slot; 414. Insert rod;

[0036] 501, locking rod one; 505, locking rod two; 503, one-way clamping tooth one; 504, clamping part; 506, gear one; 508, connecting rod; 509, clamping rod; 510, horizontal hole; 601, adjusting knob 601; 602, third telescopic spring; 603, dial two; 701, side wall clamping rod; 702, tightening rod; 703, connecting rope 703. DETAILED DESCRIPTION

[0037] An embodiment of the present invention provides a variable diameter pulley for adjusting torque.

[0038] See also Figure 1 and Figure 4 , including a wheel body 1 and a power input shaft 2. A wheel outer diameter mechanism 3 is provided on the surface of the wheel body 1. The wheel outer diameter mechanism 3 includes a belt groove 301 slidingly connected to the wheel body 1. The belt groove 301 is driven to rotate by the wheel body 1. The belt groove 301 drives the device to rotate through the belt, so that the pulley can meet a variety of power transmission options and improve the stability of the pulley operation.

[0039] A fixed groove 302 is opened inside the belt groove 301, and a sliding clamp rod 303 is slidably connected to the inside of the wheel body 1, and one end of the sliding clamp rod 303 is plugged into the fixed groove 302. By inserting the sliding clamp rod 303 into the fixed groove 302, the belt groove 301 is fixed to the surface of the wheel body 1, thereby improving the stability of the operation of the belt groove 301.

[0040] A pulling rod 304 is fixedly connected to the surface of the sliding card rod 303, and the pulling rod 304 is slidably connected to the wheel body 1. A first telescopic spring 305 is fixedly connected to the inside of the sliding card rod 303, and the first telescopic spring 305 is fixedly connected to the wheel body 1. The first telescopic spring 305 provides a thrust to the sliding card rod 303, so that the sliding card rod 303 can be inserted into the fixed groove 302 more stably. The pulling rod 304 makes it convenient to pull the sliding card rod 303, thereby reducing the difficulty of replacing the belt groove 301 and improving the efficiency of replacing the belt groove 301 with different wheel diameters.

[0041] See also Figure 2 and Figure 3 A torque adjustment mechanism 4 is provided in the middle of the wheel body 1. The torque adjustment mechanism 4 includes a first connecting disk 401, a second connecting disk 402 and a threaded ring 405. The middle thread of the threaded ring 405 is connected with an adjusting dial 408. The internal rotation of the adjusting dial 408 is connected with a second telescopic spring 409, and the second telescopic spring 409 is fixedly connected to the second connecting disk 402. The first connecting disk 401 and the second connecting disk 402 conflict with each other, so that the power input shaft 2 drives the threaded ring 405 to rotate, and then the wheel body 1 and the belt groove 301 drive the belt transmission. The adjusting dial 408 rotates inside the threaded ring 405, and the pressure of the second telescopic spring 409 on the second connecting disk 402 is adjusted, and the meshing force between the first connecting disk 401 and the second connecting disk 402 is adjusted, so as to adjust the torsion of the pulley to avoid damage to the power equipment when the load is too large, thereby improving the stability and safety of the power equipment operation.

[0042] The surface of the power input shaft 2 is rotatably connected with a fixed bearing 410, and the fixed bearing 410 is fixedly connected to the wheel body 1, the first connecting disk 401 is fixedly connected to the power input shaft 2, and the first connecting disk 401 is adapted to the second connecting disk 402. The power input shaft 2 is fixed by the fixed bearing 410 to improve the stability of the operation of the power input shaft 2.

[0043] A sliding column 403 is fixedly connected to the middle of the first connecting disk 401, and a sliding groove 404 is opened in the middle of the second connecting disk 402, and the sliding column 403 is slidably connected to the sliding groove 404. The operating position of the second connecting disk 402 is fixed by the sliding column 403 and the sliding groove 404, thereby improving the stability of the engagement between the first connecting disk 401 and the second connecting disk 402.

[0044] The threaded ring 405 is fixedly connected to the wheel body 1, and a linkage groove 406 is provided inside the threaded ring 405. A linkage block 407 is slidably connected inside the linkage groove 406, and the linkage block 407 is fixedly connected to the second connecting disk 402. The linkage block 407 is fixed through the linkage groove 406, and the second connecting disk 402 drives the wheel body 1 to rotate through the linkage block 407, thereby improving the stability of the device operation.

[0045] A pointer 411 is fixedly connected to the surface of the wheel body 1, and a scale plate 412 is fixedly connected to the surface of the adjustment dial 408. Through the pointer 411 and the adjustment dial 408, the maximum torque provided by the device can be understood, thereby improving the efficiency of the device in adjusting the torque.

[0046] A slot 413 is provided on the surface of the adjusting dial 408, and an insertion rod 414 is slidably connected to the surface of the wheel body 1, and one end of the insertion rod 414 is plugged into the slot 413. The insertion rod 414 is inserted into the slot 413 to fix the position of the adjusting dial 408, thereby preventing the adjusting dial 408 from rotating due to equipment vibration and improving the stability of the operation of the adjusting dial 408.

[0047] When the present invention is in use: the first telescopic spring 305 is used to provide a thrust to the sliding card rod 303, and the sliding card rod 303 is inserted into the fixed groove 302 to fix the belt groove 301 on the surface of the wheel body 1. When it is necessary to replace the belt groove 301 with a different wheel diameter, the sliding card rod 303 is conveniently pulled by the pulling rod 304, thereby reducing the difficulty of replacing the belt groove 301 and improving the efficiency of replacing the belt groove 301 with different wheel diameters. By rotating the adjusting dial 408, the pressure of the second telescopic spring 409 on the second connecting disk 402 is adjusted, and the meshing force between the first connecting disk 401 and the second connecting disk 402 is adjusted, thereby adjusting the torsion of the pulley. The first connecting disk 401 and the second connecting disk 402 are mutually opposed, so that the power input shaft 2 drives the threaded ring 405 to rotate, and then the wheel body 1 and the belt groove 301 drive the belt to drive. Through the above device, it is avoided that the power equipment and the belt are damaged when the load is too large, and the stability and safety of the equipment operation are improved.

[0048] Furthermore, if Figure 5 As shown, in the actual practical process, the pull rod 304 lacks a locking structure, and is easily disengaged due to vibration during the actual operation, which may cause the belt groove 301 to disengage. The present invention also includes a locking structure, which includes a locking rod 1 501 and a locking rod 2 505. The pull rod 304 is provided with a horizontal hole 510, and the sliding clamping rod 303 is provided with a vertical hole 511. The side wall of the vertical hole 511 is provided with a clamping hole 1, and the fixed groove 302 is provided with a clamping hole 2. The locking rod 1 501 is slidably arranged in the horizontal hole 510. The locking rod 505 is hingedly connected to one or more connecting rods 508, and the ends of the connecting rods 508 are hingedly connected to the holding rods 509. The holding rods 509 are arranged in the holding hole 1. The locking rod 1 501 is connected to the locking rod 2 505 through the transmission structure. When the locking rod 1 501 moves to the left, it drives the locking rod 2 505 to move downward, and the locking rod 2 505 drives the connecting rod 508 to rotate, and the connecting rod 508 drives the holding rod 509 to move to the left, and finally passes through the holding hole 1 and extends into the holding hole 2 to lock the pulling rod 304.

[0049] Furthermore, the transmission structure includes gear 1 506, which is rotatably set in the vertical hole 511, a rack 1 is set at the lower left end of the locking rod 1 501, and a rack 2 is set at the upper right end of the locking rod 2 505, and both rack 1 and rack 2 are engaged with gear 1 506. Through the above-mentioned transmission structure, when the locking rod 1 501 moves to the left, the locking rod 2 505 can be driven to move downward.

[0050] Furthermore, the present invention also includes an auxiliary locking structure, which includes a clamping portion 504, a plurality of one-way latch teeth 503 are arranged on the upper side of the locking rod 501, the vertical portion of the one-way latch tooth 503 is arranged on the right side, and the inclined portion is arranged on the left side, a groove 2 is arranged on the upper side of the horizontal hole 510, a clamping portion is slidingly arranged in the groove 2, a spring 3 is arranged between the clamping portion and the groove 2, a plurality of one-way latch teeth 2 are arranged on the clamping portion, and the one-way latch teeth 2 cooperate with the one-way latch teeth 1 to achieve one-way clamping of the locking rod 1, a telescopic rod 502 is arranged on the upper end of the clamping portion, the telescopic rod 502 passes through the groove, and the telescopic rod 502 can unlock the clamping portion 504, and at the same time, when the locking structure is locked, the auxiliary locking structure has completed the one-way clamping, and the telescopic rod is finally pressed against the upper arm of the fixed groove 302 by extension, thereby locking the pulling rod 304.

[0051] Furthermore, if Figure 6 As shown, without replacing the second telescopic spring 409, a larger torque adjustment range can be achieved. The present invention further includes an adjustment knob 601, the adjustment knob 601 is fixed with a third telescopic spring 602, the third telescopic spring 602 and the second telescopic spring 409 have the same length, a threaded hole is provided at the center of the adjustment dial 408, the adjustment knob 601 is provided with an external thread, and the outer ring of the adjustment knob 601 is provided with a second dial 603, and the scale of the second dial 603 is the scale when the third telescopic spring 602 and the second telescopic spring 409 are used at the same time. The working process is: when the adjustment knob 601 is completely screwed into the adjustment dial 408, the third telescopic spring 602 and the second telescopic spring 409 act on the second connecting disk 402 at the same time, and a larger torque adjustment range can be achieved.

[0052] Furthermore, if Figure 7As shown, in order to prevent the insertion rod 414 from falling out due to vibration or other reasons during use, the present invention also includes an anti-falling-out mechanism. An anti-falling-out hole is provided in the middle of the insertion rod 414, and the anti-falling-out mechanism is arranged in the anti-falling-out hole. The anti-falling-out mechanism includes a fastening rod 702, and the fastening rod 702 has a tapered tip. A plurality of side wall grooves are provided on the outer wall of the insertion rod 414, and a side wall clamping rod 701 is provided inside the side wall groove. The bottom of the side wall clamping rod 701 has an inclined tip with a radius smaller than that of the side wall clamping rod, and the inclined tip passes through the bottom of the side wall groove. A connecting rope 703 is fixed to the bottom of the side wall clamping rod, and the connecting rope 703 passes through the bottom of the side wall groove and is fixedly connected to the side wall of the fastening rod 702. A marking convex ring 704 is provided on the outer side of the end, and a ground slot hole is provided on the inner wall of the slot 413 for the side wall clamping rod 701 to be inserted into. The working process is: insert the insertion rod 414 into the slot 413. When the marking convex ring 704 contacts the outer side of the slot 413, it means that the insertion rod 414 has moved into place, and the slot hole is aligned with the side wall clamping rod 701. At this time, push the fastening rod 702 in, and the tip of the fastening rod 702 pushes the side wall clamping rod 701 into the slot hole to position the insertion rod 414. When the insertion rod 414 needs to be removed, the fastening rod 702 is pulled outward, the fastening rod 702 pulls the connecting rope 703, and the connecting rope 703 pulls the side wall clamping rod 701 out of the slot hole to unlock the insertion rod 414.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A torque-adjustable variable diameter pulley, comprising a pulley body (1) and a power input shaft (2), characterized in that: The surface of the wheel body (1) is provided with a wheel outer diameter mechanism (3), the wheel outer diameter mechanism (3) comprises a belt groove (301) slidably connected to the wheel body (1), a torque adjustment mechanism (4) is provided in the middle of the wheel body (1), the torque adjustment mechanism (4) comprises a first connecting disk (401), a second connecting disk (402) and a threaded ring (405), the middle of the threaded ring (405) is threadedly connected with an adjustment dial (408), the interior of the adjustment dial (408) is rotatably connected with a second telescopic spring (409), and the second telescopic spring (409) is fixedly connected to the second connecting disk (402), a fixed groove (302) is provided in the interior of the belt groove (301), a sliding clamping rod (303) is slidably connected to the interior of the wheel body (1), and one end of the sliding clamping rod (303) is plugged into the fixed groove (302), and a locking structure is also included.

2. The variable diameter pulley for adjusting torque according to claim 1, characterized in that: The locking structure comprises a locking rod 1 (501) and a locking rod 2 (505). A horizontal hole (510) is arranged in the pulling rod (304), and a vertical hole (511) is arranged in the sliding clamping rod (303). The vertical hole (511) is communicated with the horizontal hole (510). A plurality of clamping holes 1 are penetrated through the inner wall of the vertical hole (511). A plurality of clamping holes 2 are arranged on the inner wall of the fixing groove (302). The locking rod 1 (501) is slidably arranged in the horizontal hole (510). The locking rod 2 (505) is hingedly connected to one or more connecting rods (508). The ends of the connecting rods (508) are hingedly connected to the clamping rods (509). The clamping rods (509) are arranged in the clamping hole 1. The locking rod 1 (501) is connected to the locking rod 2 (505) through a transmission structure. The left and right movement of the locking rod 1 (501) drives the locking rod 2 (505) to move up and down.

3. The variable diameter pulley for adjusting torque according to claim 2, characterized in that: The transmission structure comprises gear one (506), gear one (506) is rotatably arranged in the vertical hole (511), a rack one is arranged at the lower left end of locking rod one (501), and a rack two is arranged at the upper right end of locking rod two (505), and both rack one and rack two are meshed with gear one (506).

4. The variable diameter pulley for adjusting torque according to claim 3, characterized in that: The auxiliary locking structure also includes an auxiliary locking structure, which includes a clamping portion (504), a plurality of one-way clamping teeth (503) are arranged on the upper side of the locking rod (501), the vertical portion of the one-way clamping tooth (503) is arranged on the right side, and the inclined portion is arranged on the left side, a groove (510) is arranged on the upper side, a clamping portion (504) is slidably arranged in the groove (510), a spring (504) is arranged between the clamping portion (504) and the groove (510), and the clamping portion (504) is provided with a plurality of one-way clamping teeth (503), and the one-way clamping teeth (503) cooperate with the one-way clamping teeth (503) to realize one-way clamping of the locking rod (510).

5. The variable diameter pulley for adjusting torque according to claim 1, characterized in that: A pulling rod (304) is fixedly connected to the surface of the sliding clamping rod (303), and the pulling rod (304) is slidably connected to the wheel body (1); a first telescopic spring (305) is fixedly connected to the interior of the sliding clamping rod (303), and the first telescopic spring (305) is fixedly connected to the wheel body (1).

6. The variable diameter pulley for adjusting torque according to claim 1, characterized in that: The surface of the power input shaft (2) is rotatably connected with a fixed bearing (410), and the fixed bearing (410) is fixedly connected to the wheel body (1), the first connecting disk (401) is fixedly connected to the power input shaft (2), and the first connecting disk (401) is adapted to the second connecting disk (402).

7. The variable diameter pulley for adjusting torque according to claim 1, characterized in that: A sliding column (403) is fixedly connected to the middle of the first connection disk (401), a sliding groove (404) is provided in the middle of the second connection disk (402), and the sliding column (403) is slidably connected to the sliding groove (404).

8. The variable diameter pulley for adjusting torque according to claim 1, characterized in that: The threaded ring (405) is fixedly connected to the wheel body (1), a linkage groove (406) is provided inside the threaded ring (405), a linkage block (407) is slidably connected inside the linkage groove (406), and the linkage block (407) is fixedly connected to the second connection disk (402).

9. The variable diameter pulley for adjusting torque according to claim 1, characterized in that: A pointer (411) is fixedly connected to the surface of the wheel body (1), and a scale plate (412) is fixedly connected to the surface of the adjustment dial (408).

10. The variable diameter pulley for adjusting torque according to claim 1, characterized in that: A slot (413) is provided on the surface of the adjusting dial (408), and an insertion rod (414) is slidably connected to the surface of the wheel body (1), and one end of the insertion rod (414) is plugged into the slot (413).

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