Adjustable rope groove spacing anti-interference wear-resistant pulley

Abstract

This utility model discloses an adjustable rope groove spacing anti-interference and wear-resistant pulley, belonging to the field of pulleys. It includes two pulley drive frames arranged horizontally and horizontally. A large pulley wheel is rotatably mounted at the front end between the two pulley drive frames. Small pulley wheels a and b are rotatably mounted at the upper and lower ends of the rear side between the two pulley drive frames. Each pulley drive frame includes support arms a and b that open and close vertically. A large wheel axle seat is fixedly mounted at the front end of support arms a and b. This device drives support arms a and b to open and close through an adjustment mechanism. Combined with the swing compensation of the swing rod in the swing cavity, it realizes precise adjustment of the rope groove spacing between the large pulley and small pulley, and between the small pulleys. It can adapt to ropes of different diameters and different strand numbers, meet diverse operation needs without changing the pulley, reduce usage costs, has a significant anti-interference effect, and provides smooth transmission.

Description

Technical Field

[0001] This utility model relates to the field of pulleys, specifically to an interference-resistant and wear-resistant pulley with adjustable rope groove spacing. Background Technology

[0002] As a core transmission component in lifting and traction operations, pulleys are widely used in construction, logistics and transportation, engineering machinery and other fields. They mainly achieve force transmission and direction conversion through the cooperation of wheel grooves and ropes.

[0003] In the prior art, patent number CN201320402587.X discloses a rope guide pulley system, including a first pulley system and a second pulley system. The first pulley system includes a first bracket and a first pulley rotatably mounted on the first bracket. The second pulley system includes a second bracket and a second pulley rotatably mounted on the second bracket. The first pulley and the second pulley are arranged opposite to each other. A first side of the first bracket is hinged to a first side of the second bracket, and a second side of the first bracket is locked to a second side of the second bracket by a locking device. Since the rope threading operation can be performed simply by unlocking the locking device, without the need to disassemble the entire first pulley system, the rope threading efficiency is significantly improved compared to the prior art. Furthermore, the simplified operation process makes the operation safer and more convenient. This utility model also discloses a crane with the above-mentioned rope guide pulley system.

[0004] The aforementioned pulleys still face numerous technical bottlenecks in practical applications. For example, they suffer from poor adaptability: the spacing cannot be flexibly adjusted according to rope diameter, number of strands, and other specifications. When different rope specifications need to be replaced, the entire pulley must be replaced, increasing operating and time costs. Furthermore, they are prone to interference and wear: friction and jamming can easily occur between the rope and the edge of the wheel, or between adjacent wheels, due to mismatched spacing. This can lead to accelerated rope wear, deformation of the wheel grooves, and even safety hazards.

[0005] Based on this, this utility model designs an interference-resistant and wear-resistant pulley with adjustable rope groove spacing to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an interference-resistant and wear-resistant pulley with adjustable rope groove spacing.

[0007] To achieve the above objectives, this utility model provides the following technical solution: An adjustable rope groove spacing anti-interference wear-resistant trolley includes two trolley drive frames arranged horizontally and horizontally. A large trolley wheel is rotatably mounted at the front end between the two trolley drive frames, and small trolley wheels a and b are rotatably mounted at the upper and lower ends of the rear side between the two trolley drive frames. Each trolley drive frame includes support arms a and b that open and close vertically. A large wheel axle seat is hinged to the front end of each support arm a and support arm b, and a small wheel axle seat is fixedly mounted at the rear end of each support arm a and support arm b. An adjusting cylinder a and adjusting cylinder b are fixedly mounted between the two small wheel axle seats. An adjusting mechanism is installed inside each adjusting cylinder a and adjusting cylinder b. A swing cavity is formed on the rear side wall of the large wheel axle seat, and a swing rod is swayably mounted at the front end of each support arm a and support arm b, and the swing rod is hinged in the swing cavity.

[0008] Furthermore, the adjusting mechanism includes an adjusting screw rotatably installed inside adjusting cylinder a and an adjusting cylinder rotatably installed inside adjusting cylinder b. The adjusting screw is screwed into the adjusting cylinder, and a bearing seat is fixedly installed at the top end of the inner part of adjusting cylinder a. The top end of the adjusting screw is rotatably installed in the bearing seat.

[0009] Furthermore, a fixed seat is fixedly installed at the bottom end of the adjusting screw, and the fixed seat is rotatably installed inside the adjusting cylinder b. A support spring is movably fitted around the adjusting screw and the outside of the adjusting screw between the shaft seat and the fixed seat.

[0010] Furthermore, the bearing seat includes a shaft cylinder a and a shaft cylinder b arranged opposite to each other. Rotary cavities are evenly spaced along the axis of the inner walls of the shaft cylinder a and shaft cylinder b. Ball bearings are rotatably installed inside the rotary cavities and are in contact with the outer wall of the adjusting screw.

[0011] Furthermore, connecting plates are fixedly installed on both side walls of the shaft cylinder a and shaft cylinder b, and the side walls of the connecting plates are provided with screw holes, and bolts are screwed into the screw holes.

[0012] Furthermore, a bearing plate is fixedly installed on the rear sidewall of the shaft cylinders a and b.

[0013] Furthermore, a drive hole a is provided at the center of the large wheel axle seat, a large wheel axle is rotatably installed in the drive hole a, the trolley wheel is rotatably installed outside the large wheel axle, and a U-shaped frame is fixedly installed at the bottom end of the large wheel axle seat.

[0014] Furthermore, a drive hole b is provided at the center of the small wheel axle seat, and small wheel axle a and small wheel axle b are rotatably installed inside the two drive holes b respectively. The trolley wheel a is rotatably installed outside the small wheel axle a, and the trolley wheel b is rotatably installed outside the small wheel axle b.

[0015] Compared with the prior art, the advantages of this utility model are as follows: the rope groove spacing is flexible and adjustable, with wide adaptability: the adjustment mechanism drives the support arm a and support arm b to open and close, and combined with the swing compensation of the swing rod in the swing cavity, the precise adjustment of the rope groove spacing between the large wheel and the small wheel of the pulley, and between the small wheels, can be achieved. It can adapt to ropes of different diameters and different strands, and can meet diverse operation needs without changing the pulley, reducing the cost of use. The anti-interference effect is significant, and the transmission is smooth: the layout design of "large wheel at the front + double small wheels on the rear side" is adopted. With the opening and closing of the support arm and the position compensation of the swing rod, the cross interference between the rope and the wheel edge and adjacent ropes during the transmission process is effectively avoided, reducing jamming. At the same time, the ball bearing in the axle seat fits with the adjusting screw, reducing the frictional resistance during the adjustment process and ensuring the smoothness of the spacing adjustment and transmission process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front-view three-dimensional structural diagram of an anti-interference and wear-resistant pulley with adjustable rope groove spacing according to the present invention; Figure 2 This is a schematic diagram of the pulley drive frame of an adjustable rope groove spacing anti-interference and wear-resistant pulley according to the present invention; Figure 3 This is a schematic diagram of the adjustment mechanism of an anti-interference and wear-resistant pulley with adjustable rope groove spacing according to the present invention; Figure 4 This is a schematic diagram of the axle seat of an anti-interference and wear-resistant pulley with adjustable rope groove spacing according to this utility model.

[0018] The labels in the diagram represent: 1. Large wheel of the trolley; 2. Trolley drive frame; 3. Small wheel axle; 4. Small wheel a; 5. Small wheel b; 6. Small wheel axle b; 7. U-shaped frame; 8. Large wheel axle; 9. Large wheel axle seat; 10. Support arm a; 11. Drive hole b; 12. Adjusting cylinder a; 13. Adjusting cylinder b; 14. Small wheel axle seat; 15. Support arm b; 16. Swing cavity; 17. Swing rod; 18. Drive hole a; 19. Support spring; 20. Fixed seat; 21. Adjusting screw cylinder; 22. Adjusting screw; 23. Shaft seat; 24. Shaft cylinder a; 25. Shaft cylinder b; 26. Bearing plate; 27. Screw hole; 28. Connecting plate; 29. ​​Bolt; 30. Ball bearing; 31. Rotating cavity. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] In some embodiments, please refer to the accompanying drawings. Figures 1-4 An adjustable rope groove spacing anti-interference wear-resistant trolley includes two trolley drive frames 2 arranged horizontally and horizontally. A large trolley wheel 1 is rotatably mounted at the front end between the two trolley drive frames 2. Small trolley wheels a4 and b5 are rotatably mounted at the upper and lower ends of the rear side between the two trolley drive frames 2. The trolley drive frame 2 includes support arms a10 and b15 that open and close vertically. A large wheel axle seat 9 is hinged to the front end of support arms a10 and b15. Small wheel axle seats 14 are fixedly mounted at the rear end of support arms a10 and b15. An adjusting cylinder a12 and an adjusting cylinder b13 are fixedly mounted between the two small wheel axle seats 14. An adjusting mechanism is installed inside the adjusting cylinders a12 and b13. A swing cavity 16 is opened on the rear side wall of the large wheel axle seat 9. A swing rod 17 is swingably mounted at the front end of support arms a10 and b15. The swing rod 17 is hinged in the swing cavity 16.

[0021] Specifically, the two pulley drive frames 2 are integrally formed from high-strength alloy material. The parallel spacing between them is adapted to the axial length of the large pulley wheel 1, the small pulley wheel a4, and the small pulley wheel b5, ensuring no radial offset when the wheels rotate. The large pulley wheel 1 is located at the center line connecting the front ends of the two drive frames. The small pulley wheels a4 and b5 are symmetrically distributed vertically along the rear side of the drive frame, forming a main and two auxiliary wheel system layout, which can realize multi-rope parallel transmission or single-rope multi-directional guidance. Support arms a10 and b15 adopt a hinged upper and lower opening and closing structure. Support arms a10 and b15 are hinged to the inside of the large wheel axle seat 9 via swing rod 17. Adjusting cylinders a12 and b13 are hollow cylindrical structures. After coaxial docking, they form the mounting cavity of the adjustment mechanism. The swing cavity 16 is an arc-shaped groove structure. The two ends of the swing rod 17 are respectively hinged to the front end of the support arm and the inner wall of the swing cavity 16 via pins. Self-lubricating bearings are installed at the hinges to ensure that the swing rod 17 rotates flexibly when the support arm is opened and closed, to compensate for the displacement deviation of the front end of the support arm, and to avoid the structure from jamming.

[0022] In some embodiments, such as Figures 1-4As shown, the adjustment mechanism includes an adjustment screw 22 rotatably installed in the adjustment cylinder a12 and an adjustment screw cylinder 21 rotatably installed in the adjustment cylinder b13. The adjustment screw 22 is screwed into the adjustment screw cylinder 21. A bearing seat 23 is fixedly installed at the top of the inner part of the adjustment cylinder a12, and the top of the adjustment screw 22 is rotatably installed in the bearing seat 23.

[0023] Specifically, the threads of the adjusting screw 22 and the adjusting cylinder 21 are trapezoidal threads, which have the characteristics of strong load-bearing capacity and good self-locking performance, effectively preventing the spacing from shifting due to vibration after adjustment. The top of the adjusting screw 22 is provided with an annular groove, which cooperates with the limiting structure in the bearing seat 23 to restrict the axial displacement of the adjusting screw 22, allowing it to rotate only around its own axis. The top of the adjusting cylinder a12 is provided with a mounting groove that matches the bearing seat 23. The bearing seat 23 is fixed to the adjusting cylinder a12 by bolts, and the mounting surface is provided with a positioning pin to ensure the coaxiality of the bearing seat 23 and the adjusting screw 22. The outer wall of the adjusting cylinder 21 and the inner wall of the adjusting cylinder b13 are fitted with a clearance fit, and its bottom end is fixed to the fixed seat 20 by a key connection, ensuring that when the adjusting screw 21 rotates, it drives the fixed seat 20 to move axially synchronously, thereby driving the support arm b15 to open and close.

[0024] In some embodiments, such as Figures 1-4 As shown, a fixed seat 20 is fixedly installed at the bottom end of the adjusting screw cylinder 21. The fixed seat 20 is rotatably installed inside the adjusting cylinder b13. A support spring 19 is movably fitted between the adjusting screw 22 and the outside of the adjusting screw cylinder 21, located between the shaft seat 23 and the fixed seat 20.

[0025] Specifically, the support spring 19 is made of high-temperature resistant spring steel, and its elastic coefficient is designed according to the rated load of the trolley. It can apply continuous pressure to the threaded mating surfaces of the adjusting screw 22 and the adjusting cylinder 21 to eliminate thread clearance. When the trolley is subjected to impact load, the support spring 19 can absorb the impact force through compression deformation, preventing the adjusting mechanism from being damaged by instantaneous overload. The fixed seat 20 has a disc-shaped structure, and its diameter is adapted to the inner diameter of the adjusting cylinder b13. It is fixed to the bottom of the adjusting cylinder b13 by welding, providing a stable support reference for the support spring 19, while limiting the maximum downward stroke of the adjusting cylinder 21.

[0026] In some embodiments, such as Figures 1-4 As shown, the bearing seat 23 includes a shaft cylinder a24 and a shaft cylinder b25 arranged opposite to each other. Rotating cavities 31 are evenly spaced along the axis of the inner walls of the shaft cylinder a24 and the shaft cylinder b25. Ball bearings 30 are rotatably installed inside the rotating cavities 31 and are in contact with the outer wall of the adjusting screw 22. Specifically, shaft cylinders a24 and b25 adopt a semi-cylindrical structure, which, after being spliced ​​together, form a complete cylindrical shaft cavity. The inner diameter of the shaft cavity is clearance-fitted with the outer diameter of the adjusting screw 22. The rotating cavity 31 is a hemispherical groove, with 6-8 grooves evenly distributed on the inner wall of the shaft cavity. Each rotating cavity 31 is equipped with a ball bearing 30, which makes line contact with the outer wall of the adjusting screw 22, thus converting the traditional sliding friction into rolling friction, significantly reducing the resistance when the adjusting screw 22 rotates, and reducing component wear.

[0027] In some embodiments, such as Figures 1-4 As shown, connecting plates 28 are fixedly installed on both side walls of shaft cylinder a24 and shaft cylinder b25. The side walls of the connecting plates 28 are provided with screw holes 27, and bolts 29 are screwed into the screw holes 27.

[0028] Specifically, the connecting plate 28 is a rectangular steel plate, which is welded perpendicularly to the side walls of shaft cylinders a24 and b25. There are two connecting plates 28 on each side of the shaft cylinder, symmetrically distributed at both ends of the shaft cylinder. The screw hole 27 is a through threaded hole, and the bolt 29 is a high-strength internal hex bolt. After tightening, the shaft cylinders a24 and b25 can fit tightly together, ensuring the roundness accuracy of the shaft cavity.

[0029] In some embodiments, such as Figures 1-4 As shown, a bearing plate 26 is fixedly installed on the rear side wall of shaft cylinder a24 and shaft cylinder b25.

[0030] Specifically, the bearing plate 26 has an L-shaped structure. One end is welded to the rear side wall of the shaft cylinder a24 and shaft cylinder b25, and the other end is fixed to the inner wall of the adjusting cylinder a12 by bolts 29. Its function is to disperse the radial force borne by the bearing seat 23, avoid deformation of the bearing seat 23 due to force concentration, and enhance the connection stability between the bearing seat 23 and the adjusting cylinder.

[0031] In some embodiments, such as Figures 1-4 A drive hole a18 is provided at the center of the large wheel axle seat 9. The large wheel axle 8 is rotatably installed in the drive hole a18. The trolley wheel 1 is rotatably installed outside the large wheel axle 8. A U-shaped frame 7 is fixedly installed at the bottom of the large wheel axle seat 9.

[0032] Specifically, the inner wall of the drive hole a18 has a raceway, and a deep groove ball bearing is installed inside. The large wheel axle 8 is fitted with the drive hole a18 through the bearing. The outer ring of the bearing is interference-fitted with the drive hole a18, and the inner ring is transition-fitted with the large wheel axle 8, ensuring smooth rotation of the large wheel 1 and reducing friction loss. Shoulders and lock nuts are provided at both ends of the large wheel axle 8 to limit the axial displacement of the large wheel 1 and prevent the wheel from falling off. The U-shaped frame 7 is made of bent steel plate, and its opening size is adapted to the connection end of the external installation equipment. The bottom of the U-shaped frame 7 has mounting holes, allowing the trolley to be fixed to supports, cranes, and other equipment with bolts. The U-shaped structure design enhances the stability after installation and can withstand lateral and longitudinal loads.

[0033] In some embodiments, such as Figures 1-4 A drive hole b11 is provided at the center of the small wheel axle seat 14. Small wheel a3 and small wheel a6 are rotatably installed inside the two drive holes b11 respectively. The trolley wheel a4 is rotatably installed outside the small wheel a3, and the trolley wheel b5 is rotatably installed outside the small wheel a6.

[0034] Specifically, the structure of drive hole b11 is the same as that of drive hole a18, and it is also equipped with raceway bearings to ensure the rotational accuracy of small wheel axles a3 and b6. The lengths of small wheel axles a3 and b6 are adapted to the spacing of small wheel axle seats 14, and their ends are fixed by locking washers and nuts to prevent axial movement of the wheels during rotation. The groove curvature of pulley wheels a4 and b5 is adapted to the diameter of common ropes, and the inner wall of the groove is provided with a wear-resistant coating, which can significantly reduce the friction coefficient between the rope and the groove, and extend the service life of the rope and the wheel.

[0035] Working principle: The drive adjusting screw 22 rotates, and through its threaded engagement with the adjusting screw cylinder 21, it drives the adjusting cylinders a12 and b13 to move relative to each other. This, in turn, pushes the support arms a10 and b15 to open and close around the hinge point of the swing rod 17. The swing rod 17 swings synchronously within the swing cavity 16, compensating for the displacement of the front end of the support arm and ensuring precise adjustment of the distance between the large and small wheels. The support spring 19 is pre-tightened to eliminate thread clearance, and the pawl locks and fixes the adjusted distance. During operation, the rope is embedded in the rope groove of each wheel, and the wheel axle achieves low-resistance rotation through the ball bearing 30 in the axle seat 23. The U-shaped frame 7 fixes the entire trolley. The "one main and two auxiliary" wheel system layout avoids rope interference. The wear-resistant coating and the friction design of the ball bearing 30 reduce wear and achieve stable transmission.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An anti-interference wear-resistant pulley with adjustable rope groove spacing, comprising two pulley drive frames (2) arranged in parallel on the left and right, characterized in that, A large trolley wheel (1) is rotatably mounted at the front end between the two trolley drive frames (2), and small trolley wheels a (4) and b (5) are rotatably mounted at the upper and lower ends of the rear side between the two trolley drive frames (2). The trolley drive frame (2) includes a support arm a (10) and a support arm b (15) that open and close vertically. The front ends of the support arm a (10) and the support arm b (15) are hinged to a large wheel axle seat (9). The rear ends of the support arm a (10) and the support arm b (15) are fixedly installed with small wheel axle seats (14). An adjusting cylinder a (12) and an adjusting cylinder b (13) are fixedly installed between the two small wheel axle seats (14). An adjusting mechanism is installed inside the adjusting cylinder a (12) and the adjusting cylinder b (13). A swing cavity (16) is opened on the rear side wall of the large wheel axle seat (9). The front ends of the support arm a (10) and the support arm b (15) are swing rods (17) that are hinged in the swing cavity (16).

2. The adjustable rope groove spacing anti-chafing pulley of claim 1, wherein, The adjustment mechanism includes an adjustment screw (22) rotatably installed in an adjustment cylinder a (12) and an adjustment cylinder (21) rotatably installed in an adjustment cylinder b (13). The adjustment screw (22) is screwed into the adjustment cylinder (21). A bearing seat (23) is fixedly installed at the top of the inner end of the adjustment cylinder a (12). The top end of the adjustment screw (22) is rotatably installed in the bearing seat (23).

3. The adjustable rope groove spacing anti-chafing pulley of claim 2, wherein, The bottom end of the adjusting screw (21) is fixedly installed with a fixed seat (20), which is rotatably installed inside the adjusting cylinder b (13). The adjusting screw (22) and the outside of the adjusting screw (21) are movably fitted with a support spring (19) between the shaft seat (23) and the fixed seat (20).

4. The adjustable rope groove spacing anti-chafing pulley of claim 2, wherein, The bearing seat (23) includes a shaft cylinder a (24) and a shaft cylinder b (25) arranged opposite to each other. Rotating cavities (31) are evenly spaced along the axis of the inner walls of the shaft cylinder a (24) and the shaft cylinder b (25). A ball bearing (30) is rotatably installed inside the rotating cavity (31). The ball bearing (30) is in contact with the outer wall of the adjusting screw (22).

5. The adjustable rope groove spacing anti-chafing pulley of claim 4, wherein, Both sides of the shaft cylinder a (24) and shaft cylinder b (25) are fixedly installed with connecting plates (28). The side walls of the connecting plates (28) are provided with screw holes (27), and bolts (29) are screwed into the screw holes (27).

6. The adjustable rope groove spacing anti-chafing pulley of claim 5, wherein, The rear sidewalls of the shaft cylinders a (24) and b (25) are fixedly fitted with bearing plates (26).

7. The adjustable rope groove spacing anti-chafing pulley of claim 1, wherein, A drive hole a (18) is provided at the center of the large wheel axle seat (9). The large wheel axle (8) is rotatably installed in the drive hole a (18). The trolley wheel (1) is rotatably installed outside the large wheel axle (8). A U-shaped frame (7) is fixedly installed at the bottom end of the large wheel axle seat (9).

8. The adjustable rope groove spacing anti-chafing pulley of claim 1, wherein, A drive hole b (11) is provided at the center of the small wheel axle seat (14). Small wheel axle a (3) and small wheel axle b (6) are rotatably installed inside the two drive holes b (11). The trolley wheel a (4) is rotatably installed outside the small wheel axle a (3), and the trolley wheel b (5) is rotatably installed outside the small wheel axle b (6).

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