Anti-off groove hoisting pulley device
The design of the anti-derailment mechanism solves the problem of wire rope detachment during hoisting, achieving stable guidance and automated anti-derailment of the wire rope, thus improving the safety and service life of the equipment.
Patent Information
- Application Number
- CN202521117700.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2026-06-12
- Estimated Expiration
- 2035-06-03
AI Technical Summary
The pulley system in existing hoisting equipment is prone to coming off during hoisting due to wire rope slack, swinging, or external force, leading to equipment failure and safety accidents. In addition, the limit switches cannot be adjusted flexibly, resulting in equipment damage.
An anti-derailment mechanism is adopted, including a rotatable baffle, a self-locking mechanism, a reset mechanism, and a wear compensation mechanism. Through the guidance of the guide ramp, the engagement of the ratchet and the elastic pawl, and the reset function of the torsion spring, the wire rope is ensured to enter the pulley groove smoothly and prevented from getting out.
It effectively prevents wire ropes from derailing, reduces wear, improves the automation level of the device, avoids lifting failures or equipment damage, and extends service life.
Smart Images
Figure CN224350300U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lifting machinery technology, specifically a lifting pulley device to prevent detachment from the groove. Background Technology
[0002] In existing hoisting equipment, pulley systems are an indispensable component, used to guide and support wire ropes.
[0003] During hoisting, the wire rope may come off the pulley groove due to slack, swinging, or external force, leading to equipment failure or even safety accidents. The limit switch in the existing device has a fixed position and cannot be flexibly adjusted according to the actual working conditions. It is easy to damage the equipment due to inaccurate limit. Therefore, we propose a hoisting pulley device to prevent it from coming off the groove. Utility Model Content
[0004] To address the problems raised in the background art, this utility model provides the following technical solution: a lifting pulley device for preventing detachment from the groove, comprising a pulley body, a bracket, and a wire rope, and further comprising:
[0005] An anti-detachment mechanism, comprising rotatable baffles symmetrically arranged on both sides of the pulley body, wherein the rotatable baffles are hinged to the bracket via a rotating shaft;
[0006] The self-locking mechanism includes a ratchet rack disposed on at least one side baffle and an elastic pawl disposed on a bracket, wherein the ratchet rack and the elastic pawl engage to form a one-way locking structure.
[0007] A reset mechanism, comprising a torsion spring sleeved on a rotating shaft, one end of which is fixed to a baffle and the other end to a bracket;
[0008] The wear compensation mechanism includes a wear-resistant pad located inside the baffle.
[0009] Preferably, the open end of the rotatable baffle is provided with a guide slope, and the guide slope and the rim of the pulley body form a flared structure, which helps the wire rope to enter the pulley groove more smoothly, reduces the risk of derailment caused by wire rope deviation, and improves the guiding performance of the device.
[0010] Preferably, the ratchet has asymmetrical trapezoidal teeth with a tooth surface inclination angle of 30°-60°, and the end of the elastic pawl has a wedge-shaped surface that matches the ratchet, which can better realize the one-way locking function and prevent the baffle from opening accidentally during the operation of the wire rope.
[0011] Preferably, the inclination angle of the guide ramp is 45°-60° to ensure that the wire rope can enter the pulley groove more smoothly and reduce the risk of derailment due to improper angle.
[0012] Preferably, the wear-resistant liner is made of polyurethane composite material, which has high wear resistance and good elasticity, effectively reducing wear on the wear-resistant liner and extending the service life of the device.
[0013] Preferably, the thickness of the rotatable baffle is 8-12mm, ensuring that the baffle meets the strength requirements without increasing the weight or complexity of the device due to excessive thickness.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] During operation, when the hoisting work begins, the wire rope smoothly enters the pulley groove through the guide ramp. The flared structure of the guide ramp helps the wire rope enter the pulley groove more smoothly and reduces deflection. As the wire rope enters, the rotatable baffle rotates around its axis due to the tension of the wire rope, ensuring close contact between the inner side of the baffle and the wire rope, preventing the wire rope from slipping out of the groove. When the baffle rotates to a certain position, the ratchet and the elastic pawl engage, forming a one-way locking structure. This locking mechanism ensures that the baffle will not rotate in the opposite direction due to external forces during hoisting, thus effectively preventing the wire rope from slipping out of the groove. (The text also mentions wear-resistant pads and steel...) The wire rope contacts the wire rope, reducing wear. If wear is found on the wear-resistant pad, the gap between the pad and the wire rope can be adjusted by adjusting the bolts to ensure the normal operation of the device. When the hoisting operation ends, the tension of the wire rope disappears or decreases, and the torsion spring provides the reset torque, so that the baffle automatically returns to the initial position, preparing for the next hoisting operation. It can effectively block the wire rope, and even if the wire rope swings or deviates, it can prevent it from going out of the groove. This reduces manual intervention, improves the automation level of the device, and also avoids hoisting failure or equipment damage caused by the baffle not returning to its original position. Attached Figure Description
[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0017] Figure 1 This is a front view of the overall structure of this utility model;
[0018] In the diagram: 1. Pulley body; 2. Bracket; 3. Wire rope; 4. Baffle; 5. Shaft; 6. Ratchet; 7. Elastic pawl; 8. Torsion spring; 9. Wear-resistant pad; 11. Guide ramp. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0020] Depend on Figure 1 As shown, this utility model includes a pulley body 1, a bracket 2, and a steel wire rope 3, and also includes:
[0021] The anti-detachment mechanism includes rotatable baffles 4 symmetrically arranged on both sides of the pulley body 1, and the rotatable baffles 4 are hinged to the bracket 2 through a rotating shaft 5.
[0022] The self-locking mechanism includes a ratchet 6 provided on at least one side baffle 4 and an elastic pawl 7 provided on the bracket 2. The ratchet 6 and the elastic pawl 7 engage to form a one-way locking structure.
[0023] The reset mechanism includes a torsion spring 8 sleeved on the rotating shaft 5, with one end of the torsion spring 8 fixed to the baffle 4 and the other end fixed to the bracket 2;
[0024] The wear compensation mechanism includes a wear-resistant pad 9 located inside the baffle 4.
[0025] The rotatable baffle 4 has a guide slope 11 at its open end. The guide slope 11 and the rim of the pulley body 1 form a flared structure, which helps the wire rope to enter the pulley groove more smoothly, reduces the risk of derailment caused by the wire rope deflection, and improves the guiding performance of the device.
[0026] The ratchet 6 has asymmetrical trapezoidal teeth with a tooth surface inclination angle of 30°-60°. The end of the elastic pawl 7 is provided with a wedge-shaped surface that matches the ratchet 6, which can better realize the one-way locking function and prevent the baffle from opening accidentally during the operation of the wire rope.
[0027] The guide ramp 11 has an inclination angle of 45°-60° to ensure that the wire rope can enter the pulley groove more smoothly and reduce the risk of derailment due to improper angle.
[0028] The wear-resistant liner 9 is made of polyurethane composite material, which has high wear resistance and good elasticity, effectively reducing wear on the wear-resistant liner and extending the service life of the device.
[0029] The thickness of the rotatable baffle 4 is 8-12mm, ensuring that the baffle meets the strength requirements without increasing the weight or complexity of the device due to excessive thickness.
[0030] Working Principle: During operation, when the hoisting operation begins, the wire rope 3 smoothly enters the pulley groove through the guide ramp 11. The flared structure of the guide ramp helps the wire rope enter the pulley groove more smoothly, reducing deviation. As the wire rope enters, the rotatable baffle 4 rotates around the shaft 5 due to the tension of the wire rope, ensuring close contact between the inner side of the baffle and the wire rope, preventing the wire rope from slipping out of the groove. When the baffle 4 rotates to a certain position, the ratchet 6 engages with the elastic pawl 7, forming a one-way locking structure. This locking mechanism ensures that the baffle will not rotate in the opposite direction due to external forces during hoisting, thus effectively preventing the wire rope from slipping out of the groove. The pad 9 contacts the wire rope 3 to reduce wear. If wear is found on the wear-resistant pad, the gap between the pad and the wire rope can be adjusted by adjusting the bolt 10 to ensure the normal operation of the device. When the hoisting operation ends, the tension of the wire rope 3 disappears or decreases, and the torsion spring 8 provides the reset torque, so that the baffle 4 automatically resets to the initial position to prepare for the next hoisting operation. It can effectively block the wire rope and prevent it from going out of the groove even if the wire rope swings or deviates. It reduces manual intervention, improves the automation level of the device, and also avoids hoisting failure or equipment damage caused by the baffle not resetting.
[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A lifting pulley device for preventing detachment from the groove, comprising a pulley body (1), a bracket (2), and a wire rope (3), characterized in that: Also includes: The anti-detachment mechanism includes rotatable baffles (4) symmetrically arranged on both sides of the pulley body (1), and the baffles (4) are hinged to the bracket (2) through a rotating shaft (5); The self-locking mechanism includes a ratchet (6) provided on at least one side baffle (4) and an elastic pawl (7) provided on the bracket (2). The ratchet (6) and the elastic pawl (7) mesh to form a one-way locking structure. The reset mechanism includes a torsion spring (8) sleeved on the rotating shaft (5), one end of the torsion spring (8) is fixed to the baffle (4), and the other end is fixed to the bracket (2). The wear compensation mechanism includes a wear-resistant pad (9) located inside the baffle (4).
2. The anti-derailment hoisting pulley device according to claim 1, characterized in that: The rotatable baffle (4) has a guide slope (11) at its open end, and the guide slope (11) and the wheel rim of the pulley body (1) form a flared structure.
3. The anti-derailment hoisting pulley device according to claim 2, characterized in that: The tooth shape of the ratchet (6) is an asymmetrical trapezoidal tooth with a tooth surface inclination angle of 30°-60°, and the end of the elastic pawl (7) is provided with a wedge-shaped surface that matches the ratchet (6).
4. The anti-derailment hoisting pulley device according to claim 3, characterized in that: The inclination angle of the guide slope (11) is 45°-60°.
5. The anti-derailment hoisting pulley device according to claim 4, characterized in that: The wear-resistant liner (9) is made of polyurethane composite material.
6. The anti-derailment hoisting pulley device according to claim 5, characterized in that: The thickness of the rotatable baffle (4) is 8-12mm.