Chain lifting protection device
By designing a chain lifting protection device including a protective mechanism and wear-resistant nylon block, the platform whereabouts and unbalance caused by the break of the chain of the three-dimensional lift is solved, and effective protection of staff is achieved.
Patent Information
- Application Number
- CN202422076714.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The chains in the three-dimensional lift are prone to break after long-term use, resulting in the platform falling and unbalanced, endangering the safety of staff.
Design a chain lift protection device, including a lifting car, a protective mechanism and wear-resistant nylon block. The protection mechanism consists of a connecting plate, an anti-fall pawl, a chain extrusion rod and an anti-fall stop. Through the bounce-opening action of the chain extrusion rod, the anti-fall pawl is moved to the anti-fall pawl, and the anti-fall pawl is stabilized by gravity to prevent the lifting car from falling.
It effectively prevents the falling of the lifting car and protects the safety of staff. It is more stable than the traditional spring structure, avoiding the mechanical structure lag and spring failure.
Smart Images
Figure CN222922877U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chain lifting protection, and in particular to a chain lifting protection device. Background Art
[0002] Chains are used in three-dimensional elevators. Three-dimensional elevators are used during the construction of workers. For example, when workers need to spray large equipment and perform rust prevention treatment on large equipment. During the operation, due to the high height of large equipment, it is impossible for workers alone to spray large equipment comprehensively. At this time, a three-dimensional elevator needs to be used. By moving the chain inside the three-dimensional elevator, workers stand on the platform and can control the lifting or falling of the workers to meet the production needs.
[0003] Due to various wear and tear during the long-term use of the chain, it is very easy for the chain to break. Once the chain breaks, the platform will fall, and the platform will also lose balance. Workers standing on the platform will fall and be in danger. Therefore, a chain lifting protection device is proposed to solve the above problems. Summary of the Utility Model
[0004] To make up for the above deficiencies, the utility model provides a chain lifting protection device that overcomes the above technical problems or at least partially solves the above problems.
[0005] The utility model is implemented as follows:
[0006] The utility model provides a chain lifting protection device, including a machine body, and a lifting trolley is arranged inside the machine body;
[0007] A protection mechanism, the protection mechanism includes;
[0008] A connecting plate, the connecting plate is installed at the left and right ends of the lifting trolley, and an anti-falling pawl is installed outside the connecting plate;
[0009] A chain extrusion rod, the chain extrusion rod is arranged outside the anti-falling pawl, the outer surface of the anti-falling pawl is stably connected to a pawl shaft, and one end of the pawl shaft is fixedly connected to the chain extrusion rod;
[0010] An anti-falling stop block, the anti-falling stop block is fixedly installed on the outer surface of the machine body, the anti-falling stop block is provided in several numbers, and the distance between every two anti-falling stop blocks meets the use of the anti-falling pawl and the chain extrusion rod.
[0011] In a preferred solution, a pawl shaft bracket is fixedly installed on the outer surface of the connecting plate, the pawl shaft passes through the inside of the pawl shaft bracket and extends to the outside of the pawl shaft bracket, and the pawl shaft is rotatably connected to the pawl shaft bracket.
[0012] In a preferred solution, a traction rod is stably mounted on the lifting trolley, and a lifting chain is mounted on the traction rod.
[0013] In a preferred solution, a wear-resistant nylon block is fixedly installed on the inner side of the chain extrusion rod, and the wear-resistant nylon block is slidably connected to the outer surface of the lifting chain.
[0014] The utility model provides a chain lifting protection device, and its beneficial effects include:
[0015] An anti-fall pawl is arranged on the connecting plate, a pawl shaft is fixedly installed on the outer surface of the anti-fall pawl, and a chain squeezing rod is fixedly installed at one end of the pawl shaft. The lifting chain is squeezed by the chain squeezing rod so that when the lifting chain breaks, the chain squeezing rod will pop open, thereby moving the anti-fall pawl to the anti-fall block, and under the action of the deadweight of the lifting trolley, the anti-fall pawl is firmly pressed against the anti-fall block, thereby preventing the lifting trolley from falling and preventing danger. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 This is a state diagram of the anti-fall pawl of the utility model under normal use;
[0018] Figure 2 This is a schematic diagram of the anti-fall chain of the utility model in a broken state;
[0019] Figure 3 This is a schematic diagram of the installation position of the lifting trolley of the utility model;
[0020] Figure 4 This is a schematic diagram of the structure of the wear-resistant nylon block of the utility model;
[0021] In the figure: 1. anti-fall pawl; 2. chain extrusion rod; 3. pawl shaft; 4. pawl shaft bracket; 5. anti-fall block; 6. wear-resistant nylon block; 7. lifting chain; 8. lifting trolley; 9. machine body; 10. protection mechanism; 101. connecting plate; 11. traction rod. DETAILED DESCRIPTION
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.
[0023] Embodiment
[0024] Referring to Figures 1 - 4 , the present utility model provides a technical solution: a chain lifting protection device, including a machine body 9 and a protection mechanism 10, and a lifting trolley 8 is arranged inside the machine body 9. The protection mechanism 10 includes a connecting plate 101, and the connecting plate 101 is installed at the left and right ends of the lifting trolley 8. An anti-falling pawl 1 is installed outside the connecting plate 101, a chain pressing rod 2 is arranged outside the anti-falling pawl 1, the outer surface of the anti-falling pawl 1 is stably connected to a pawl shaft 3, one end of the pawl shaft 3 is fixedly connected to the chain pressing rod 2, an anti-falling stopper 5 is fixedly installed on the outer surface of the machine body 9, and a plurality of anti-falling stoppers 5 are provided. The distance between every two anti-falling stoppers 5 meets the use requirements of the anti-falling pawl 1 and the chain pressing rod 2.
[0025] In a preferred embodiment, a pawl shaft bracket 4 is fixedly installed on the outer surface of the connecting plate 101. The pawl shaft 3 penetrates through the inside of the pawl shaft bracket 4 and extends to the outside of the pawl shaft bracket 4. The pawl shaft 3 is rotatably connected to the pawl shaft bracket 4. To ensure the stable use of the protection mechanism 10 in this device, the pawl shaft bracket 4 is installed on the connecting plate 101, and the pawl shaft 3 is rotatably arranged inside the pawl shaft bracket 4. The movement of the chain pressing rod 2 drives the anti-falling pawl 1 to move. When it is moved onto the anti-falling stopper 5, the lifting trolley 8 can be limited to prevent it from falling.
[0026] In a preferred embodiment, a traction rod 11 is stably installed on the lifting trolley 8, and a lifting chain 7 is installed on the traction rod 11. In this device, the traction rod 11 is installed on the lifting trolley 8, and then the lifting chain 7 is connected to the traction rod 11, so that the movement of the lifting chain 7 can drive the lifting trolley 8 to move while controlling the movement of the lifting chain 7, and the staff can be moved to the spraying position.
[0027] In a preferred embodiment, a wear-resistant nylon block 6 is fixedly installed on the inner side of the chain extrusion rod 2, and the wear-resistant nylon block 6 is slidably connected to the outer surface of the lifting chain 7. When the device is in normal use, the chain extrusion rod 2 will be tightly pressed against the lifting chain 7 so that the chain extrusion rod 2 will be bounced open when the lifting chain 7 breaks. In order to reduce the wear of the chain extrusion rod 2, a wear-resistant nylon block 6 is installed on the inner side of the chain extrusion rod 2. By fitting the wear-resistant nylon block 6 against the lifting chain 7, the wear on the chain extrusion rod 2 can be reduced.
[0028] Specifically, the working process or working principle of a chain lifting protection device is: during long-term use, the chain will be subject to various wear and tear, which can easily lead to chain breakage. Once the chain breaks, the platform will fall and lose balance, and the staff standing on the platform will also fall down, causing danger. Therefore, this device is designed to solve this problem.
[0029] The device can clamp the anti-fall pawl 1 on the anti-fall block 5 under the action of gravity, and is used to limit the lifting trolley 8 so that it cannot fall, thereby protecting the staff and avoiding danger. Compared with the traditional spring structure, it is more stable and relies on gravity to avoid the mechanical structure from getting stuck and the spring from failing, which meets the requirements of use. The specific operation is that the device is set in a three-dimensional lift for use. When the staff is needed to spray large equipment, the staff stands on the lifting trolley 8 and drives the lifting chain 7 to move through the external reducer, and pulls the lifting trolley 8 to move upward, so that the staff can be sent to the spraying position. When the lifting trolley 8 moves upward, the protective mechanism 10 will also move with it.
[0030] When the lifting chain 7 is in normal use, the bottom end position of the anti-falling pawl 1 is staggered with the position of the anti-falling block 5, and the anti-falling pawl 1 is in an inclined state. At this time, the side of the chain squeezing rod 2 will fit with the lifting chain 7, squeezing the lifting chain 7, which will reduce the wear of the chain squeezing rod 2. A wear-resistant nylon block 6 is fixedly installed on the inner side surface of the chain squeezing rod 2, and the wear-resistant nylon block 6 fits with the lifting chain 7, and the lifting chain 7 slides with the wear-resistant nylon block 6, thereby reducing the wear on the chain squeezing rod 2.
[0031] When the lifting chain 7 breaks, the lifting chain 7 will generate elastic force, which will bounce the chain extrusion rod 2 outward. When the chain extrusion rod 2 moves, the anti-fall pawl 1 will move to the position of the anti-fall block 5 under the rotation of the pawl shaft 3 and contact the anti-fall block 5. Under the action of the gravity of the lifting trolley 8, the anti-fall pawl 1 will firmly rest on the anti-fall block 5, thereby preventing the lifting trolley 8 from falling and protecting the staff, leaving enough time for the rescue personnel to avoid danger.
[0032] This device has a simple structure, low cost, reliable mechanical structure and is easy to maintain.
Claims
1. A chain lifting protection device, characterized in that: It comprises a machine body (9), and a lifting trolley (8) is arranged inside the machine body (9); A protection mechanism (10), the protection mechanism (10) comprising: A connecting plate (101), the connecting plate (101) being installed at the left and right ends of the lifting trolley (8), and an anti-falling pawl (1) being installed outside the connecting plate (101); A chain extrusion rod (2), wherein the chain extrusion rod (2) is arranged outside the anti-falling pawl (1), the outer surface of the anti-falling pawl (1) is stably connected to the pawl shaft (3), and one end of the pawl shaft (3) is fixedly connected to the chain extrusion rod (2); An anti-falling block (5) is fixedly mounted on the outer surface of the machine body (9), and a plurality of anti-falling blocks (5) are provided, and the distance between every two anti-falling blocks (5) is sufficient for the use of the anti-falling pawl (1) and the chain extrusion rod (2).
2. The chain lifting protection device according to claim 1, characterized in that: The outer surface of the connecting plate (101) is fixedly mounted with a pawl shaft bracket (4); the pawl shaft (3) passes through the interior of the pawl shaft bracket (4) and extends to the exterior of the pawl shaft bracket (4); the pawl shaft (3) is rotatably connected to the pawl shaft bracket (4).
3. The chain lifting protection device according to claim 2, characterized in that: A traction rod (11) is stably mounted on the lifting trolley (8), and a lifting chain (7) is mounted on the traction rod (11).
4. The chain lifting protection device according to claim 3, characterized in that: A wear-resistant nylon block (6) is fixedly installed at the inner side of the chain extrusion rod (2), and the wear-resistant nylon block (6) is slidably connected to the outer surface of the lifting chain (7).