Safety self-locking mechanism of lifting equipment
By combining a pawl and a ratchet plate with an electric push rod, the lifting equipment achieves self-locking in case of accidental descent, solving the safety problem of accidental fall and ensuring the safety and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI ZHENGYI MECHANICAL & ELECTRICAL ENG CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-04-21
AI Technical Summary
Existing lifting equipment lacks an effective safety self-locking mechanism in the event of an accidental fall, which could cause the cargo platform to plummet at high speed and result in serious consequences.
It adopts a combination structure of pawl and ratchet plate. The pawl locks on the ratchet plate to prevent accidental landing, and the self-locking is achieved by using an electric push rod to control the raising and lowering of the pawl.
In the event of an accidental descent of the lifting equipment, the pawl automatically locks to prevent the equipment from falling and ensure safety and reliability.
Smart Images
Figure CN224147693U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lifting device technology, specifically a safety self-locking mechanism for lifting equipment. Background Technology
[0002] Lifting equipment is an indispensable key mechanical equipment in modern engineering operations, material handling, and high-altitude operations. Lifting equipment generally uses hydraulic, mechanical, or electric transmission to achieve stable and controllable vertical movement of the carrying platform. Its core function is to overcome the operational obstacles caused by height differences. Lifting equipment is widely used in many fields such as construction, factory maintenance, warehousing and logistics, equipment installation, stage scenery, fire rescue, and cleaning of large venues. It can safely and efficiently transport personnel, tools, or materials to the designated working height and reliably stop them, greatly improving work efficiency and reducing the risks and intensity of manual climbing and handling. It is an important guarantee for modern industrial production and high-altitude safe operations.
[0003] The core risk of existing lifting equipment lies in accidental falls. Without effective protection, the cargo platform will fall at high speed due to gravity, causing serious consequences. To address this issue, a safety self-locking mechanism for lifting equipment is proposed. Utility Model Content
[0004] The purpose of this utility model is to provide a safety self-locking mechanism for lifting equipment to solve the problems mentioned in the background art.
[0005] By adopting the above technical solution, a safe self-locking mechanism is achieved when the lifting equipment falls unexpectedly.
[0006] Compared with the prior art, the beneficial effects of this utility model are: In this utility model, the lifting arm drives the equipment to rise and fall. When the equipment rises, the slider slides forward and the pawl moves normally on the ratchet plate. When the equipment falls unexpectedly, the pawl moves backward and locks itself through the ratchet plate, thereby preventing the equipment from falling unexpectedly.
[0007] In this invention, during normal descent, the electric push rod extends, causing the connecting rod 9 to lift the pawl. After the position detection switch senses the position of the pawl, the electric push rod stops. When descent stops, the electric push rod automatically retracts, causing the connecting rod to lower the pawl, thereby achieving pawl locking and retraction. Attached Figure Description
[0008] Figure 1 This is a three-dimensional schematic diagram of a safety self-locking mechanism for a lifting device proposed in this utility model;
[0009] Figure 2 This is a schematic diagram of the connecting side plate of a safety self-locking mechanism for a lifting device proposed in this utility model;
[0010] Figure 3 This is a schematic diagram of the lifting arm of a lifting device with a safety self-locking mechanism proposed in this utility model;
[0011] Figure 4 This is a front view of a safety self-locking mechanism for a lifting device proposed in this utility model;
[0012] Figure 5 This is a right view of a safety self-locking mechanism for a lifting device proposed in this utility model.
[0013] In the diagram: 1. Bottom rail; 2. Base plate; 3. Guide rail; 4. Slider; 5. Base; 6. Connecting side plate; 7. Fixed seat; 8. Electric push rod; 9. Connecting rod; 10. Pawl; 11. Rotating shaft one; 12. Racket plate; 13. Fixing plate; 14. Position detection switch; 15. Electrical connection wire; 16. Fixed side plate; 17. Lifting arm; 18. Rotating shaft two; 19. Fixing nut. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] Please see Figure 1-4 This utility model provides a technical solution: a safety self-locking mechanism for lifting equipment, including a bottom rail 1, a bottom plate 2 fixedly connected to the top of the bottom rail 1, a guide rail 3 fixedly connected to the top of the bottom plate 2, a slider 4 slidably connected to the top of the guide rail 3, and a base 5 fixedly connected to the top of the slider 4. The base 5 slides on the top of the guide rail 3 via the slider 4. Two fixed side plates 16 are fixedly connected to the top of the base 5. A lifting arm 17 is rotatably connected to the inner side of the fixed side plate 16. The other end of the lifting arm 17 is connected to the lifting platform, heavy objects, or other equipment loads. When the equipment load rises normally, it will drive the slider 4 to move forward. A connecting side plate 6 is fixedly connected to the outer side of the base 5. A control component is installed on the outer side of the connecting side plate 6. A self-locking component is installed on the outer side of the connecting side plate 6. If the equipment load falls unexpectedly during the rising process, the self-locking component will lock it to prevent the unexpected fall. If it falls normally, the control component can control the self-locking component to retract to prevent locking.
[0016] The self-locking assembly includes a ratchet plate 12, which is fixedly connected to the outside of the bottom rail 1. A pawl 10 is slidably connected to the top of the ratchet plate 12. The pawl 10 is rotatably connected to the outside of the connecting side plate 6. When the equipment load rises normally, the slider 4 moves forward and the pawl 10 moves normally on the ratchet plate 12. In the event of an accidental drop, the pawl 10 retracts and locks itself by the ratchet teeth on the ratchet plate 12.
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Please see Figure 1 , Figure 2 and Figure 4 The control component includes an electric push rod 8, the working end of which is rotatably connected to a connecting rod 9. The connecting rod 9 is fixedly connected to the bottom of the pawl 10. During normal descent, the electric push rod 8 extends, and the connecting rod 9 drives the pawl 10 to lift. When descent stops, the electric push rod 8 retracts, and the connecting rod 9 drives the pawl 10 to fall.
[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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-5 A fixing plate 13 is fixedly connected to the outer side of the connecting side plate 6. A position detection switch 14 is installed on the inner side of the fixing plate 13. An electrical connection line 15 is fixedly connected to the top of the position detection switch 14. The position status of the pawl 10 is detected by the position detection switch 14. During normal descent, after the pawl 10 is lifted, the position detection switch 14 senses the signal and controls the electric push rod 8 to stop moving, ensuring that the descent process is executed in sequence. The electrical connection line 15 transmits the position status sensed by the position detection switch 14 to the control system, so that the control system controls the extension and retraction of the electric push rod 8 according to the signal.
[0021] A rotating shaft 11 is fixedly connected to the outer side of the connecting side plate 6. A pawl 10 is rotatably connected to the outer side of the rotating shaft 11, and the pawl 10 is fixed and limited by the rotating shaft 11. A fixed seat 7 is fixedly connected to the outer side of the connecting side plate 6, and an electric push rod 8 is fixedly connected to the outer side of the fixed seat 7. A rotating shaft 18 is rotatably connected to the inner side of the fixed side plate 16. A lifting arm 17 is rotatably connected to the outer side of the rotating shaft 18, and the fixed side plate 16 is fixed and limited by the rotating shaft 18. A fixing nut 19 is installed on the inner side of the rotating shaft 18 to fix the rotating shaft 18.
[0022] Working principle: The lifting arm 17 drives the equipment to rise and fall. When the equipment rises normally, the slider 4 will slide forward along the guide rail 3, and the pawl 10 will move normally on the ratchet plate 12. When the equipment falls unexpectedly during the lifting process, the pawl 10 will retreat and lock through the ratchet on the ratchet plate 12 to prevent the equipment from falling unexpectedly.
[0023] When the equipment descends normally, the electric push rod 8 extends, causing the connecting rod 9 to lift the pawl 10. After the position detection switch 14 senses the position of the pawl 10, the electric push rod 8 stops working, allowing the descent process to proceed normally. When the equipment stops descending, the electric push rod 8 automatically retracts, causing the connecting rod 9 to lower the pawl 10, thereby locking and retracting the pawl 10.
Claims
1. A safety lock mechanism for an elevator installation, comprising a bottom rail (1), characterized in that: The bottom rail (1) is fixedly connected to the top of the bottom plate (2), the bottom plate (2) is fixedly connected to the top of the guide rail (3), the top of the guide rail (3) is slidably connected to the slider (4), the top of the slider (4) is fixedly connected to the base (5), the top of the base (5) is fixedly connected to two fixed side plates (16), the inner side of the fixed side plate (16) is rotatably connected to the lifting arm (17), the outer side of the base (5) is fixedly connected to the connecting side plate (6), the outer side of the connecting side plate (6) is equipped with a control component, and the outer side of the connecting side plate (6) is equipped with a self-locking component. The self-locking assembly includes a ratchet plate (12), which is fixedly connected to the outside of the bottom rail (1). A pawl (10) is slidably connected to the top of the ratchet plate (12), and the pawl (10) is rotatably connected to the outside of the connecting side plate (6).
2. A safety lock mechanism for an elevator according to claim 1, characterized in that: The control component includes an electric push rod (8), the working end of which is rotatably connected to a connecting rod (9), and the connecting rod (9) is fixedly connected to the bottom of the pawl (10).
3. A safety lock mechanism for an elevator according to claim 1, characterized in that: A fixing plate (13) is fixedly connected to the outer side of the connecting side plate (6), and a position detection switch (14) is installed on the inner side of the fixing plate (13).
4. A safety lock mechanism for an elevator according to claim 3, characterized in that: An electrical connection wire (15) is fixedly connected to the top of the position detection switch (14).
5. A safety lock mechanism for an elevator according to claim 1, wherein: A rotating shaft (11) is fixedly connected to the outer side of the connecting side plate (6), and the pawl (10) is rotatably connected to the outer side of the rotating shaft (11).
6. A safety lock mechanism for an elevator according to claim 2, wherein: A fixed seat (7) is fixedly connected to the outer side of the connecting side plate (6), and the electric push rod (8) is fixedly connected to the outer side of the fixed seat (7).
7. A safety lock mechanism for an elevator according to claim 1, wherein: The inner side of the fixed side plate (16) is rotatably connected to the second rotating shaft (18), and the lifting arm (17) is rotatably connected to the outer side of the second rotating shaft (18).
8. A safety lock mechanism for an elevator according to claim 7, characterized in that: A fixing nut (19) is installed on the inner side of the second rotating shaft (18).