A movable pulley steel wire rope anti-jumping device
By designing a limit wheel and locking rod, and utilizing the wire rope skipping event to trigger locking, the problem of wire rope skipping from the moving pulley is solved, achieving safe locking and simplifying installation and maintenance, thereby improving the equipment's performance and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 大城鼎立(北京)科技发展有限公司
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-07
AI Technical Summary
In existing technologies, the wire rope of the moving pulley is prone to jumping out of the groove, which leads to equipment wear, safety hazards and production interruption. Existing anti-jumping devices are complex in structure, costly and inconvenient to install and maintain.
Design an anti-jump device including a limit wheel and a locking rod. Through the cooperation of elastic components and a rotating shaft, the locking is triggered by the wire rope jumping event, so as to achieve a fast-response safety locking.
It effectively prevents wire rope from derailing, improves equipment safety and operational reliability, reduces equipment failures and safety risks, simplifies installation and maintenance, and lowers costs.
Smart Images
Figure CN224467431U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of movable pulley technology, specifically relating to a movable pulley wire rope anti-jumping device. Background Technology
[0002] In numerous fields such as industrial production, construction, and logistics, movable pulleys are a common mechanical component widely used in various lifting, traction, and transmission equipment. Through their cooperation with wire ropes, they can achieve functions such as saving effort and changing the direction of force, playing a crucial role in improving work efficiency and reducing labor intensity.
[0003] However, in the actual operation of moving pulleys, the problem of wire rope derailment has always been a major challenge for the industry. Once wire rope derailment occurs, meaning the wire rope comes out of the pulley groove, it will lead to a series of serious consequences. From the perspective of the equipment itself, after the wire rope derails, it may rub and collide with other parts of the pulley, causing accelerated wear, deformation, or even damage to the pulley groove. At the same time, it will also cause serious damage to the wire rope, such as scraping and breakage, greatly shortening the service life of the pulley and the wire rope, and increasing the maintenance and replacement costs of the equipment. From the perspective of production operations, wire rope derailment will cause equipment operation interruption, affecting normal production processes and reducing work efficiency. For some industries with high requirements for production continuity, such as automated production lines and port loading and unloading, the economic losses caused by downtime for maintenance are incalculable. More seriously, wire rope derailment may also cause safety accidents. For example, when hoisting heavy objects, the derailed wire rope may suddenly break, causing the heavy object to fall, posing a great threat to the lives of personnel on site, and may also damage surrounding equipment and facilities, causing significant property damage.
[0004] Currently, various solutions have been proposed in existing technologies to prevent wire ropes from jumping off the pulley. For example, some solutions limit the range of motion of the wire rope by installing blocks or protective plates on the outside of the pulley. However, this method has certain limitations in practical use. When the wire rope is subjected to a large external impact or severe vibration occurs during equipment operation, the blocks or protective plates may not be effective in preventing the wire rope from jumping off the pulley. Other methods involve increasing the depth of the pulley groove or changing the shape of the groove, but this may affect the normal rotation performance of the pulley, increase running resistance, and is difficult to modify for some already installed and used equipment. In addition, some existing anti-jump devices have complex structures, are inconvenient to install and maintain, and are costly, limiting their widespread application in actual production.
[0005] To address this issue, we propose a device to prevent wire rope from jumping off the groove using a movable pulley. This device not only prevents the wire rope from jumping off the groove but also provides a safety lock in case of a malfunction, thus enhancing safety. Utility Model Content
[0006] The purpose of this invention is to provide a device for preventing wire rope from jumping out of its groove. This device can not only prevent the wire rope from jumping out of its groove, but also lock the rope in case of a malfunction to improve safety.
[0007] The specific technical solution adopted by this utility model is as follows:
[0008] A device for preventing a moving pulley wire rope from jumping off the groove includes two symmetrical mounting plates, a first rotating shaft is provided between the two mounting plates, two pulley bodies are provided on the first rotating shaft, and a circular groove is provided on the first rotating shaft, with locking holes arrayed on the inner wall of the circular groove.
[0009] Each of the two mounting plates has a first sliding groove on one side that is close to each other. An elastic component is provided inside the first sliding groove. A second rotating shaft is provided on the elastic component. Two limiting wheels are provided on the second rotating shaft. The limiting wheels are located inside the wheel groove of the pulley body. A circular disk that rotates inside the circular sliding groove is provided on the second rotating shaft. Locking rods are arranged in an array on the outer side of the circular disk.
[0010] Furthermore, the circular groove matches the circular disc, and the locking rod matches the locking hole.
[0011] Furthermore, the limiting wheel matches the groove of the pulley body.
[0012] Furthermore, the elastic component includes a fixed shaft disposed inside the first groove, a slider and a spring are sleeved on the fixed shaft, the bottom of the slider is connected to the spring, and a second rotating shaft is disposed on one side of the slider.
[0013] Furthermore, the slider is matched with the first groove.
[0014] Furthermore, the fixed shaft is provided with a plurality of first threaded holes, and the mounting plate is provided with a plurality of second threaded holes communicating with the first sliding groove, and fixing bolts are provided inside the first threaded holes and the second threaded holes.
[0015] Furthermore, the limiting wheel is provided with an anti-wear surface.
[0016] The technical effects achieved by this utility model are as follows:
[0017] 1. By setting limit wheels and locking rods, the device integrates normal anti-jump (limit wheel clamping) and fault safety locking, thereby improving the device's performance.
[0018] 2. The locking action is triggered entirely by the fault event of the wire rope jumping out of the groove itself, without the need for external sensors or control signals, and the response is rapid and reliable. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a front view of the utility model;
[0021] Figure 3 This is a schematic diagram of the structure of the elastic component of this utility model;
[0022] Figure 4 This is a structural schematic diagram of the pulley body of this utility model.
[0023] The attached diagram lists the components represented by each number as follows:
[0024] 1. Mounting plate; 2. First rotating shaft; 16. Pulley body; 3. Circular groove; 4. Locking hole; 5. First groove; 6. Second rotating shaft; 7. Limiting wheel; 8. Circular disc; 9. Locking rod; 10. Fixed shaft; 11. Slider; 12. Spring; 13. First threaded hole; 14. Second threaded hole; 15. Fixing bolt. Detailed Implementation
[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.
[0026] like Figures 1-4 As shown, a device for preventing a moving pulley wire rope from jumping off the groove includes two symmetrical mounting plates 1, a first rotating shaft 2 is arranged between the two mounting plates 1, two pulley bodies 16 are arranged on the first rotating shaft 2, and a circular groove 3 is opened on the first rotating shaft 2. Locking holes 4 are arranged in an array on the inner wall of the circular groove 3.
[0027] Each of the two mounting plates 1 has a first groove 5 on one side that is close to each other. An elastic component is provided inside the first groove 5. A second rotating shaft 6 is provided on the elastic component. Two limiting wheels 7 are provided on the second rotating shaft 6. The limiting wheels 7 are located inside the wheel groove of the pulley body 16. A circular disk 8 that rotates inside the circular groove 3 is provided on the second rotating shaft 6. Locking rods 9 are arranged in an array on the outside of the circular disk 8.
[0028] The circular slide 3 is matched with the circular disc 8, and the locking rod 9 is matched with the locking hole 4. This arrangement allows the circular disc 8 to move inside the circular slide 3, while the locking rod 9 can enter the locking hole 4 to lock.
[0029] At the same time, the limiting wheel 7 matches the groove of the pulley body 16. This arrangement allows the limiting wheel 7 to enter the groove of the pulley body 16 to prevent the wire rope from jumping out of the groove.
[0030] The elastic component includes a fixed shaft 10 disposed inside the first slide groove 5. A slider 11 and a spring 12 are sleeved on the fixed shaft 10. The bottom of the slider 11 is connected to the spring 12, and a second rotating shaft 6 is disposed on one side of the slider 11. When the second rotating shaft 6 is lifted, the second rotating shaft 6 drives the slider 11 to stretch the spring 12, thereby opening the groove of the pulley body 16 to allow the wire rope to enter. When the limiting wheel 7 contacts the wire rope, the spring 12 is in a stretched state.
[0031] The spring 12 is selected as a high-quality spring 12, whose elastic potential energy can be selected according to Hooke's Law, which is existing technology and will not be elaborated on here.
[0032] The slider 11 is matched with the first slide groove 5. This arrangement ensures that the slider 11 can slide inside the first slide groove 5 without getting stuck.
[0033] Furthermore, the fixed shaft 10 is provided with a plurality of first threaded holes 13, and the mounting plate 1 is provided with a plurality of second threaded holes 14 communicating with the first slide groove 5. Fixing bolts 15 are provided inside the first threaded holes 13 and the second threaded holes 14. This arrangement allows the fixing bolts 15 to enter the first threaded holes 13 and the second threaded holes 14 to limit the slider 11 when the limiting wheel 7 contacts the wire rope, thus preventing the limiting wheel 7 from sliding upward.
[0034] The limit wheel 7 is provided with an anti-wear surface, which can prevent wear and improve its service life.
[0035] The working principle of this utility model is as follows: When the second rotating shaft 6 is manually lifted, the elastic component (such as the tension spring 12) is stretched, and the second rotating shaft 6 moves upward along the groove. The upward movement drives the limiting wheel 7 and the circular disc 8 to move upward together, so that the wire rope conveying groove (wheel groove) on the pulley body 16 is fully opened, making it convenient for the wire rope to pass through. This allows the circular disc 8 to completely detach from the bottom of the circular groove 3 of the first rotating shaft 2, or even if it is still in the groove, its locking rod 9 is completely disengaged from the locking hole 4. The second rotating shaft 6 is released, the elastic component contracts, and pulls the second rotating shaft 6 downward, finally pressing lightly on the wire rope passing through the wheel groove of the pulley body 16. At this time, the elastic component still maintains a certain tension (pre-tension) state, ensuring that the limiting wheel 7 applies sufficient contact pressure to the wire rope, preventing it from jumping out of the wheel groove and entering the circular groove 3 of the first rotating shaft 2 due to vibration or other reasons during normal operation. However, its locking rod 9 is not inserted into the locking hole 4 (the circular disc 8 can rotate freely in the groove). At this time, the device is in normal working condition, the pulley can rotate freely, and the wire rope is constrained in the groove by the limiting wheel 7. When a "special situation" occurs (such as severe impact, severe deflection angle, rope diameter too small or abnormal wear, etc.) causing the wire rope to jump out of the groove of the pulley body 16 (jumping out of the groove), the limiting wheel 7, which was originally pressing on the wire rope, suddenly loses the support (wire rope) below. Under the strong contraction of the elastic component (which is already in a pre-stretched state), the second rotating shaft 6 is pulled down rapidly, and the limiting wheel 7 moves down until it hits the pulley body 16 (or the edge of its groove). At the same time, the circular disc 8 is carried by the second rotating shaft 6 to move down to the bottom in the circular groove 3. During this process, the locking rod 9 on the circular disc 8 is inserted into the corresponding locking hole 4 on the inner wall of the circular groove 3 of the first rotating shaft 2. Since the locking rod 9 is inserted into the locking hole 4, a rigid connection is formed between the circular disc 8 and the first rotating shaft 2, and they can no longer rotate relative to each other. Because the second rotating shaft 6 (through the circular disc 8) is locked to the first rotating shaft 2, and the pulley on the first rotating shaft 2 is also a working pulley, the entire pulley device (including the first rotating shaft 2 and the second rotating shaft 6) is completely locked and cannot rotate. The device stops operating to prevent more serious accidents (such as rope tangling, breakage, and equipment damage) caused by the wire rope jumping out of the groove and continuing to operate.
[0036] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.
Claims
1. A device for preventing a moving pulley wire rope from jumping off the groove, comprising two symmetrical mounting plates (1), characterized in that: A first rotating shaft (2) is provided between the two mounting plates (1). Two pulley bodies (16) are provided on the first rotating shaft (2), and a circular groove (3) is provided on the first rotating shaft (2). Locking holes (4) are arrayed on the inner wall of the circular groove (3). The two mounting plates (1) are provided with a first groove (5) on the side that is close to each other. An elastic component is provided inside the first groove (5). A second rotating shaft (6) is provided on the elastic component. Two limiting wheels (7) are provided on the second rotating shaft (6). The limiting wheels (7) are located inside the wheel groove of the pulley body (16). A circular disk (8) that rotates inside the circular groove (3) is provided on the second rotating shaft (6). Locking rods (9) are arranged in an array on the outside of the circular disk (8).
2. The anti-jump device for a movable pulley wire rope according to claim 1, characterized in that: The circular groove (3) matches the circular disc (8), and the locking rod (9) matches the locking hole (4).
3. The anti-jump device for a movable pulley wire rope according to claim 1, characterized in that: The limiting wheel (7) matches the groove of the pulley body (16).
4. The anti-jump device for a movable pulley wire rope according to claim 1, characterized in that: The elastic component includes a fixed shaft (10) disposed inside the first slide groove (5), a slider (11) and a spring (12) are sleeved on the fixed shaft (10), the bottom of the slider (11) is connected to the spring (12), and a second rotating shaft (6) is disposed on one side of the slider (11).
5. The anti-jump device for a movable pulley wire rope according to claim 4, characterized in that: The slider (11) is matched with the first groove (5).
6. The anti-jump device for a movable pulley wire rope according to claim 4, characterized in that: The fixed shaft (10) has a plurality of first threaded holes (13), and the mounting plate (1) has a plurality of second threaded holes (14) communicating with the first slide groove (5). Fixing bolts (15) are provided inside the first threaded holes (13) and the second threaded holes (14).
7. The anti-jump device for a movable pulley wire rope according to claim 1, characterized in that: The limiting wheel (7) is provided with an anti-wear surface.