Anti-skid pulley with automatic locking function

Abstract

The utility model discloses an anti-skidding pulley with an automatic locking function, and relates to a hoisting pulley device, in particular to an improvement of an anti-skidding, locking and anti-falling pulley structure. In order to achieve the purpose, according to the technical scheme, the sliding wheel comprises a supporting plate, a sliding wheel body, an intermediate shaft, a swing rod and an anti-skid locking mechanism, the sliding wheel body is installed in the middle of the supporting plate in a hinged mode through the intermediate shaft, and the intermediate shaft is fixedly connected to the middle of the sliding wheel body in an inserted mode and fixedly connected with the sliding wheel body. One end of the swing rod is connected to the middle shaft in a sleeved mode, the other end of the swing rod is connected to the anti-skid locking mechanism in a sleeved mode, the two ends of the anti-skid locking mechanism are clamped in the sliding grooves of the supporting plate respectively, and a baffle is arranged on the lower left side of the supporting plate. A cylindrical hole is formed in the middle of the middle shaft, and a cylindrical sliding block capable of freely sliding in the cylindrical hole is arranged in the cylindrical hole. Passive self-locking is achieved in a mechanical mode, risks caused by human errors are reduced, the device is particularly suitable for the scene without an external power source, and when a heavy object tends to fall due to accidents, the device can be automatically locked through a built-in ratchet and pawl mechanism, and the heavy object is prevented from falling.

Description

Technical Field

[0001] This utility model relates to a lifting pulley device, specifically to an improved pulley structure with anti-slip, locking, and anti-falling features. Background Technology

[0002] Pulley systems, as a common mechanical transmission and load transfer device, are widely used in construction hoisting, high-altitude operations, industrial handling, and emergency rescue. Traditional pulley structures rely on ropes rotating through pulleys to change the direction of force, thereby lifting or moving objects. While this structure reduces the burden on manpower to some extent, its safety still poses many hidden dangers, especially in scenarios involving suspending heavy objects at heights or protecting personal safety, where safety issues are particularly prominent.

[0003] Currently, most commonly used pulley systems on the market employ ordinary pulleys without locking functions, relying entirely on the operator's continuous application of pulling force or additional braking devices (such as mechanical clamps or external locks) to maintain load stability. If the operator releases their grip, the rope loosens, the system experiences abnormal force, or external interference occurs, the heavy object can easily fall rapidly, potentially causing equipment damage or even personal injury. This type of pulley system, heavily reliant on the operator and with a delayed response, clearly cannot meet the requirements of high-safety-level applications.

[0004] To address these issues, some pulley systems on the market now incorporate self-locking mechanisms, such as clutches or gear structures, to achieve anti-slip control. However, these structures often suffer from large size, complex design, and high maintenance difficulty. Furthermore, some pulley systems attempt to incorporate ratchet and pawl mechanisms to achieve a backlash function, but due to pawl response delays, unstable locking, or susceptibility to mud and sand jamming, their reliability in actual use remains insufficient. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing an anti-slip pulley with an automatic locking function. It achieves self-locking without human error through mechanical means, reducing the risk of human error. It is especially suitable for scenarios without external power supply. When a heavy object tends to fall due to an accident, the device will automatically lock through the built-in ratchet and pawl mechanism to prevent the heavy object from falling.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: it includes a support plate 1, a pulley body 2, an intermediate shaft 3, a swing rod 4, and an anti-slip locking mechanism 5. The pulley body 2 is hinged to the middle of the support plate 1 through the intermediate shaft 3. The intermediate shaft 3 is fixedly inserted into the middle of the pulley body 2 and fixedly connected to the pulley body 2. One end of the swing rod 4 is sleeved on the intermediate shaft 3, and the other end of the swing rod 4 is sleeved on the anti-slip locking mechanism 5. Both ends of the anti-slip locking mechanism 5 are respectively engaged in the sliding groove 11 of the support plate 1. A baffle 12 is provided on the lower left side of the support plate 1.

[0007] The intermediate shaft 3 has a cylindrical hole 31 in the middle, and a cylindrical slider 32 that can slide freely in the cylindrical hole 31 is provided inside the cylindrical hole 31.

[0008] One end of the swing rod 4 is provided with a ring 41, and a circular through hole 411 is provided in the middle of the ring 41. A groove 412 is provided inside the circular through hole 411. The depth of the groove 412 gradually increases, and a vertical groove 413 is provided at one end of the groove 412. The depth of the groove 412 gradually decreases from the vertical groove. The ring 41 is sleeved on the intermediate shaft 3, and the cylindrical slider 32 corresponds to the groove 412.

[0009] The other end of the swing rod 4 is provided with a square hole 42, and the anti-slip locking mechanism 5 is inserted into the square hole 42. During the swinging process, the swing rod 4 can drive the anti-slip locking mechanism 5 to swing within the slide groove 11.

[0010] The anti-slip locking mechanism 5 includes a locking block 51 and a connecting post 52. The connecting post 52 is vertically fixed to the locking block 51. One end of the connecting post 52 away from the locking block 51 is inserted into the square hole 42 of the swing rod 4. One side of the locking block 51 is an arc surface 511, and multiple conical protrusions 512 are provided on the arc surface 511.

[0011] The end face of the connecting column 52 is provided with a threaded hole 521, into which a fastening screw is inserted. The fastening screw is used to fix and lock the connection between the swing rod 4 and the anti-slip locking mechanism 5.

[0012] The other end of the locking block 51 of the anti-slip locking mechanism 5 is provided with a positioning post 53, which is fixed in the slide groove 11 on the other side of the support plate 1.

[0013] The working principle of this utility model is as follows: In the working state of the pulley, the support plate 1 is installed on the fixed bracket, and the rope for suspending and guiding the heavy object passes through the pulley body 2. The pulley body 2 is hinged to the support plate 1 through the intermediate shaft 3. The intermediate shaft 2 is fixed at the center of the pulley and passes through the ring at one end of the swing rod 4, so that the swing rod 4 can swing around the intermediate shaft 3 within a certain range.

[0014] The intermediate shaft 3 has a cylindrical hole inside, within which a cylindrical slider can be slidably installed. The slider corresponds to the groove structure on the circular ring of the swing rod. The other end of the swing rod has a square hole for insertion into an anti-slip locking mechanism. The anti-slip locking mechanism consists of a locking block and a vertical connecting post. The connecting post is inserted into the square hole of the swing rod, and its end is fixed to a fastening screw through a threaded hole, ensuring a firm and stable connection.

[0015] When the heavy object slides down rapidly, causing the pulley body to rotate rapidly, the intermediate shaft 3 quickly deflects. The cylindrical slider 32 slides outward along the cylindrical hole 31 due to centrifugal force. The slid-out cylindrical slider 32 gets stuck in the sinker 413, thereby causing the lower end of the swing rod 4 to swing to the upper left. The swing rod 4, along with the anti-slip locking mechanism 5, moves to the upper left. The locking block 51 of the anti-slip locking mechanism 5 will lock the rope onto the baffle 12, thus achieving locking. This achieves the purpose of automatic anti-slip and locking the heavy object from falling. Simultaneously, when the rope on the left side is under tension, it can be pulled directly. The anti-slip locking mechanism 5 deflects downward, allowing the heavy object to be pulled upward directly.

[0016] The beneficial effects of this utility model after adopting the above technical solution are as follows: It uses a swing rod to drive the locking block to swing outward when the pulley accelerates, automatically locking the pulley when the heavy object falls rapidly, effectively preventing falling accidents. The anti-slip locking mechanism is secured with screws via square hole insertion, ensuring that it will not loosen or shift even under high-intensity use. The groove and countersunk structure inside the moving rod ring, combined with the slider inside the intermediate shaft, can achieve multi-level restriction and precise positioning, preventing excessive movement of the swing rod and improving safety and controllability. The support plate has a groove design, allowing for flexible installation of pulleys or locking blocks of different sizes, suitable for various industrial lifting or construction hoisting scenarios. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the anti-slip locking mechanism 5 in this utility model;

[0020] Figure 3 yes Figure 2 The left view;

[0021] Figure 4 This is a schematic diagram of the swing rod 4 in this utility model;

[0022] Figure 5 yes Figure 4 Full sectional view;

[0023] Figure 6 This is a full sectional view of the intermediate shaft 3 in this utility model;

[0024] Figure 7 This is a diagram showing the state of the anti-slip locking mechanism 5 when it is locked.

[0025] Explanation of reference numerals in the attached drawings: 1. Support plate; 2. Pulley body; 3. Intermediate shaft; 4. Swing rod; 5. Anti-slip locking mechanism; 31. Cylindrical hole; 32. Cylindrical slider; 41. Ring; 411. Circular through hole; 412. Groove; 413. Slot; 42. Square hole; 51. Locking block; 52. Connecting post; 511. Arc surface; 512. Conical protrusion; 521. Threaded hole; 53. Positioning post; 11. Slide groove; 12. Baffle. Detailed Implementation

[0026] See Figure 1-7 As shown, the technical solution adopted in this specific embodiment is as follows: it consists of a support plate 1, a pulley body 2, an intermediate shaft 3, a swing rod 4, and an anti-slip locking mechanism 5. The pulley body 2 is hinged to the middle of the support plate 1 via the intermediate shaft 3. The intermediate shaft 3 is fixedly inserted into the middle of the pulley body 2 and fixedly connected to the pulley body 2. One end of the swing rod 4 is sleeved on the intermediate shaft 3, and the other end of the swing rod 4 is sleeved on the anti-slip locking mechanism 5. Both ends of the anti-slip locking mechanism 5 are respectively engaged in the sliding groove 11 of the support plate 1. A baffle 12 is provided on the lower left side of the support plate 1. A cylindrical hole 31 is provided in the middle of the intermediate shaft 3. A cylindrical slider 32 that can slide freely within the cylindrical hole 31 is provided inside the cylindrical hole 31; one end of the swing rod 4 is provided with a ring 41, the middle of the ring 41 is provided with a circular through hole 411, the inner side of the circular through hole 411 is provided with a groove 412, the depth of the groove 412 gradually increases, and one end of the groove 412 is provided with a vertical countersink 413; the depth of the groove 412 gradually decreases from the vertical countersink; the ring 41 is sleeved on the intermediate shaft 3, and the cylindrical slider 32 corresponds to the groove 412; the other end of the swing rod 4 is provided with a square hole 42, and the anti-slip locking mechanism 5 is inserted into the square hole 42. The anti-slip locking mechanism 5 includes a locking block 51 and a connecting post 52. The connecting post 52 is vertically fixed to the locking block 51. One end of the connecting post 52 away from the locking block 51 is inserted into the square hole 42 of the swing rod 4. One side of the locking block 51 is an arc surface 511, on which multiple conical protrusions 512 are provided. The end face of the connecting post 52 is provided with a threaded hole 521, into which a fastening screw is inserted. The other end of the locking block 51 of the anti-slip locking mechanism 5 is provided with a positioning post 53, which is fixed in the groove 11 on the other side of the support plate 1.

[0027] In practical use, corresponding front and rear housings of the pulley, as well as corresponding auxiliary connecting bolts, are also required. In the working state of the pulley, the support plate 1 is mounted on a fixed bracket, and a rope for suspending and guiding the heavy object passes through the pulley body 2. The pulley body 2 is hinged to the support plate 1 via an intermediate shaft 3. The intermediate shaft 2 is fixed at the center of the pulley and passes through one end of the ring of the swing rod 4, allowing the swing rod 4 to swing within a certain range around the intermediate shaft 3. A cylindrical hole is provided inside the intermediate shaft 3, and a cylindrical slider can be slidably installed inside the cylindrical hole. The slider corresponds to the groove structure on the ring of the swing rod. A square hole is provided at the other end of the swing rod for insertion into an anti-slip locking mechanism. The anti-slip locking mechanism consists of a locking block and a vertical connecting column. The connecting column is inserted into the square hole of the swing rod, and its end is fixed to a fastening screw through a threaded hole, ensuring a firm and stable connection.

[0028] When the heavy object slides down rapidly, causing the pulley body to rotate rapidly, the intermediate shaft 3 quickly deflects. The cylindrical slider 32 slides outward along the cylindrical hole 31 due to centrifugal force. The slid-out cylindrical slider 32 engages in the sinker 413, causing the lower end of the swing rod 4 to swing upward to the left. The swing rod 4, along with the anti-slip locking mechanism 5, moves upward to the left. The locking block 51 of the anti-slip locking mechanism 5 clamps the rope onto the baffle 12, thus achieving locking. This achieves automatic anti-slip and locks the heavy object from falling. Simultaneously, when the rope on the left is under tension, it can be pulled directly. The anti-slip locking mechanism 5 deflects downward, allowing the heavy object to be pulled upward directly. It automatically locks the pulley when the heavy object falls rapidly by driving the locking block outward through the swing rod when the pulley accelerates, effectively preventing falls. The anti-slip locking mechanism is secured with square-hole insertion screws, ensuring it will not loosen or shift even under high-intensity use. The groove and countersunk structure inside the moving rod ring, combined with the slider inside the intermediate shaft, enables multi-level restraint and precise positioning, preventing excessive movement of the swing rod and improving safety and controllability. The support plate features a sliding groove design, allowing for flexible installation of pulleys or locking blocks of different sizes, suitable for various industrial lifting or construction hoisting scenarios.

[0029] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A non-slip pulley with an automatic locking function, characterized in that: It include support plate (1), pulley body (2), intermediate shaft (3), swing rod (4), anti-skid locking mechanism (5), pulley body (2) is hinged by intermediate shaft (3) and is installed in the middle of support plate (1), intermediate shaft (3) is fixedly inserted in the middle of pulley body (2) and is fixedly connected with pulley body (2), one end of swing rod (4) is sleeved on intermediate shaft (3), the other end of swing rod (4) is sleeved on anti-skid locking mechanism (5), both ends of anti-skid locking mechanism (5) are clamped in the sliding slot (11) of support plate (1) respectively, the lower left side of support plate (1) is provided with baffle (12).

2. The anti-skid pulley with automatic locking function according to claim 1, characterized in that: The middle of the intermediate shaft (3) is provided with a cylindrical hole (31), and a cylindrical slider (32) is arranged in the cylindrical hole (31) and can freely slide in the cylindrical hole (31).

3. The anti-skid pulley with automatic locking function according to claim 1, characterized in that: One end of the swing rod (4) is provided with a circular ring (41), the middle of the circular ring (41) is provided with a circular through hole (411), the inner side of the circular through hole (411) is provided with a groove (412), the depth of the groove (412) gradually deepens, and one end of the groove (412) is provided with a vertical groove (413); the depth of the groove (412) gradually shallows from the vertical groove; the circular ring (41) is sleeved on the intermediate shaft (3), and the cylindrical slider (32) corresponds to the groove (412).

4. The anti-skid pulley with automatic locking function according to claim 1, characterized in that: The other end of the swing rod (4) is provided with a square hole (42), and the anti-skid locking mechanism (5) is inserted into the square hole (42).

5. The anti-skid pulley with automatic locking function according to claim 1, characterized in that: The anti-skid locking mechanism (5) includes a locking block (51) and a connecting column (52), the connecting column (52) is fixedly connected vertically on the locking block (51), one end of the connecting column (52) away from the locking block (51) is inserted into the square hole (42) of the swing rod (4), and one side of the locking block (51) is a circular arc surface (511), a plurality of conical protrusions (512) are arranged on the circular arc surface (511).

6. The anti-skid pulley with automatic locking function according to claim 5, characterized in that: The end surface of the connecting column (52) is provided with a threaded hole (521), and a fastening screw is inserted into the threaded hole (521).

7. The anti-skid pulley with automatic locking function according to claim 1, characterized in that: The other end of the locking block (51) of the anti-skid locking mechanism (5) is provided with a positioning column (53), and the positioning column (53) is fixed in the sliding slot (11) on the other side of the support plate (1).

Images