A compact hand chain hoist with low headroom design
Patent Information
- Application Number
- CN202522491146.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-25
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-11-25
AI Technical Summary
[0004]为了弥补以上不足，本实用新型提供了一种低净空设计的紧凑型手拉葫芦，旨在改善现有技术中低净空环境空间受限，手拉葫芦调节不灵活、适配性差，导致作业低效、操作受限、有安全风险，影响灵活性与安全性的问题
1、本实用新型中，通过伸缩杆顶端的驱动，顶板带动下方部件升降，实现高度调节，通过伸缩气缸的驱动，实现起重位置的横向调节，提升了起重操作的位置精准度和场景适配性，通过液压缸推动支撑板接触地面，可在起重作业时稳定支撑工作台，避免万向轮承重变形，确保重物安全升降，保障了起重作业的灵活高效与安全稳定。
Smart Images
Figure CN224812156U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lifting device technology, and in particular to a compact hand chain hoist with a low headroom design. Background Technology
[0002] A hand chain hoist is a simple and portable manual lifting machine suitable for short-distance lifting of small equipment and goods. In practical applications, the working environment has strict restrictions on the installation height of the lifting equipment. Due to the structural design limitations, traditional hand chain hoists have a large headroom that cannot be adapted, resulting in limited operational flexibility or even inability to carry out operations. In order to adapt to the operating requirements of confined spaces and solve the limitations of traditional hand chain hoists in low headroom environments, it is necessary to use compact hand chain hoists with a low headroom design.
[0003] The pulleys of compact hand chain hoists with low headroom designs can become stuck due to dust, grease, and other impurities. Gears and bearings in the transmission components also wear down over time, affecting work efficiency and normal operation. Current solutions involve regularly cleaning and lubricating the pulleys and chain components to remove impurities and reduce friction. Additionally, high-strength alloy steel is used to manufacture transmission components, and the gear tooth design is optimized to improve transmission efficiency and wear resistance. However, the limitations of low headroom environments, inflexible hoist position adjustment, and poor adaptability to different scenarios still exist, leading to low lifting efficiency, inflexible operation, and safety risks, ultimately impacting the flexibility, efficiency, safety, and stability of lifting operations. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a compact hand chain hoist with a low headroom design, aiming to improve the problems of limited space in low headroom environments, inflexible adjustment and poor adaptability of hand chain hoists, resulting in inefficient operation, limited operation, and safety risks, affecting flexibility and safety.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a compact hand chain hoist with a low headroom design, including a workbench, an adjustment mechanism on the top of the workbench for adjusting the position of the hand chain hoist, and a replacement mechanism on the top of the workbench; The adjustment mechanism includes two mounting shells, the bottoms of which are fixedly connected to the top of the workbench. Two telescopic rods are fixedly connected to the inner bottom walls of each mounting shell. A top plate is fixedly connected to the top of each telescopic rod. A telescopic cylinder is fixedly connected to the bottom of the top plate. A displacement platform is slidably connected to the bottom of the telescopic cylinder. A housing is fixedly connected to the bottom of the displacement platform. A hand chain is fixedly connected inside the housing. Two lifting chains are fixedly connected inside the housing. A lifting shell is fixedly connected to the bottom of each lifting chain. Multiple casters are fixedly connected to the bottom of the workbench. A hydraulic cylinder is fixedly connected to the bottom of the workbench. A support plate is fixedly connected to the bottom end of the hydraulic cylinder.
[0006] As a further description of the above technical solution: The replacement mechanism includes a hook housing, the inner wall of which is slidably connected to the outer bottom wall of the lifting shell. Two lifting hooks are fixedly connected to the bottom of the hook housing. Multiple limiting posts are slidably connected to the outer wall of the hook housing. Multiple rotating shafts are rotatably connected to the outer wall of the lifting shell. Locking plates are rotatably connected to the top of each of the multiple rotating shafts. Locking grooves are opened at the top of each of the multiple limiting posts. The bottom ends of the multiple locking plates are respectively engaged with the corresponding locking grooves. Bolts are threaded to the top of each of the multiple locking plates. An anti-detachment component is provided in the middle of the lifting hook.
[0007] As a further description of the above technical solution: A control switch is fixedly connected to the front side of the mounting shell, and the control switch is electrically connected to the telescopic rod, the telescopic cylinder and the hydraulic cylinder respectively.
[0008] As a further description of the above technical solution: A crash barrier is fixedly connected to the top of the top plate, and multiple crash pads are fixedly connected to the top of the crash barrier.
[0009] As a further description of the above technical solution: Stabilizing plates are fixedly connected to the front and rear sides of the bottom of the top plate, and multiple stabilizing columns are fixedly connected to adjacent sides of the two stabilizing plates. The tops of the multiple stabilizing columns are fixedly connected to the bottom of the top plate.
[0010] As a further description of the above technical solution: The adjustment mechanism also includes a rubber pad, the top of which is fixedly connected to the bottom of the support plate.
[0011] As a further description of the above technical solution: The anti-detachment component includes two spring shafts, the front ends of which are rotatably connected to the middle of the corresponding lifting hooks, and the rear ends of both spring shafts are rotatably connected to anti-detachment columns.
[0012] As a further description of the above technical solution: The replacement mechanism also includes multiple gaskets, the inner walls of which are respectively fixedly connected to the middle of the bolt.
[0013] This utility model has the following beneficial effects: 1. In this utility model, the top plate drives the lower components to rise and fall through the top of the telescopic rod to achieve height adjustment. The horizontal adjustment of the lifting position is achieved through the drive of the telescopic cylinder, which improves the positional accuracy and scene adaptability of the lifting operation. The hydraulic cylinder pushes the support plate to contact the ground, which can stably support the workbench during lifting operations, avoid deformation of the casters under load, ensure the safe lifting of heavy objects, and guarantee the flexibility, efficiency and safety of the lifting operation.
[0014] 2. In this utility model, by releasing the bolts fixing the locking plate, flipping the locking plate and sliding out the limiting post, the hook shell is disassembled, and vice versa, the hook shell is installed, thereby realizing the replacement of the hook shell. This avoids the need for additional tools during replacement, avoids the problems of poor compatibility and inconvenient replacement, and improves the replacement efficiency. Attached Figure Description
[0015] Figure 1 A perspective view of a compact hand chain hoist with a low headroom design proposed in this utility model; Figure 2 This is a front view of a compact hand chain hoist with a low headroom design proposed in this utility model; Figure 3 A side view of a compact hand chain hoist with a low headroom design proposed in this utility model; Figure 4 This is an exploded view of the adjustment mechanism of a compact hand chain hoist with a low headroom design proposed in this utility model; Figure 5 This is an exploded view of the replacement mechanism of a compact hand chain hoist with a low headroom design proposed in this utility model.
[0016] Legend: 1. Workbench; 2. Adjustment mechanism; 201. Mounting shell; 202. Telescopic rod; 203. Top plate; 204. Telescopic cylinder; 205. Displacement platform; 206. Housing; 207. Hand chain; 208. Lifting chain; 209. Lifting shell; 210. Casters; 211. Hydraulic cylinder; 212. Support plate; 213. Rubber pad; 3. Replacement mechanism; 301. Hook shell; 302. Lifting hook; 303. Limiting post; 304. Rotating shaft; 305. Locking plate; 306. Locking groove; 307. Bolt; 308. Anti-detachment component; 3081. Spring shaft; 3082. Anti-detachment post; 309. Gasket; 4. Control switch; 5. Anti-collision plate; 6. Anti-collision pad; 7. Stabilizing plate; 8. Stabilizing post. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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] Reference Figure 1 , Figure 2 and Figure 4 The present invention provides an embodiment of a compact hand chain hoist with a low headroom design, including a workbench 1, an adjustment mechanism 2 on the top of the workbench 1 for adjusting the position of the hand chain hoist, and a replacement mechanism 3 on the top of the workbench 1 for disassembling and replacing the hook shell 301. The adjusting mechanism 2 includes two mounting shells 201, the bottoms of which are fixedly connected to the top of the workbench 1. Two telescopic rods 202 are fixedly connected to the inner bottom walls of each mounting shell 201. The telescopic rods 202 are used to adjust the lifting height. A top plate 203 is fixedly connected to the top of the telescopic rods 202. A telescopic cylinder 204 is fixedly connected to the bottom of the top plate 203. The telescopic cylinder 204 is used to adjust the lifting horizontal position. A displacement platform 205 is slidably connected to the bottom of the telescopic cylinder 204. A housing 206 is fixedly connected to the bottom of the displacement platform 205. The interior of the housing 206 is fixed... A hand zipper 207 is connected, which is used to drive the lifting chain 208 to operate by manual pulling, so as to lift the heavy object. Two lifting chains 208 are fixedly connected inside the housing 206. The bottom of the lifting chain 208 is fixedly connected to the lifting shell 209. Multiple casters 210 are fixedly connected to the bottom of the workbench 1. The casters 210 are used to move the workbench 1 flexibly and facilitate the transfer of work points. A hydraulic cylinder 211 is fixedly connected to the bottom of the workbench 1. A support plate 212 is fixedly connected to the bottom end of the hydraulic cylinder 211. The support plate 212 is used to contact the ground during lifting to provide support. Specifically, the bottoms of both mounting shells 201 are fixedly connected to the top of the workbench 1, providing a stable foundation support for the entire adjustment structure. Two telescopic rods 202 are fixedly connected to the inner bottom walls of both mounting shells 201. The telescopic rods 202 are used to adjust the lifting height; their telescopic movement can drive the top structure and lifting components to move up and down, flexibly adapting to different lifting height requirements. A top plate 203 is fixedly connected to the top of the telescopic rods 202, serving as a connection and load-bearing element, transmitting the supporting force of the telescopic rods 202 to the components below. A telescopic cylinder 204 is fixedly connected to the bottom of the top plate 203. The telescopic cylinder 204 is used to adjust the horizontal lifting position, driving related components to move laterally and adjusting the horizontal coordinates of the lifting point. A displacement platform 205 is slidably connected to the bottom of the telescopic cylinder 204, serving as an intermediate carrier for power transmission, transmitting the driving force of the telescopic cylinder 204 to the lower structure. The bottom of the displacement platform 205 is fixed... A housing 206 is fixedly connected to the workbench 1 to house and protect the internal transmission components. A hand chain 207 is fixedly connected inside the housing 206. The hand chain 207 is used to manually pull the lifting chain 208 to lift the load and provide power input for the lifting operation. Two lifting chains 208 are fixedly connected inside the housing 206, which play a key role in transmitting the pulling force and converting the driving force of the hand chain 207 into the lifting force for the load. A lifting shell 209 is fixedly connected to the bottom of the lifting chain 208 for installing the lifting components. Casters 210 are used to enable flexible movement of the workbench 1, which facilitates the transfer of work points and improves the site adaptability of the equipment. A hydraulic cylinder 211 is fixedly connected to the bottom of the workbench 1. A support plate 212 is fixedly connected to the bottom of the hydraulic cylinder 211. The support plate 212 is used to contact the ground during lifting to provide stable support, prevent the casters 210 from being damaged due to excessive load, and ensure the safety of the lifting operation.
[0019] Reference Figure 1 , Figure 3 and Figure 5The replacement mechanism 3 includes a hook housing 301, the inner wall of which is slidably connected to the outer bottom wall of the lifting housing 209. The hook housing 301 is used to install lifting hooks 302. Two lifting hooks 302 are fixedly connected to the bottom of the hook housing 301. Multiple limiting posts 303 are slidably connected to the outer wall of the hook housing 301. The limiting posts 303 are used to insert into the lifting housing 209 and initially limit the position of the hook housing 301. Multiple rotating shafts 304 are rotatably connected to the outer wall of the lifting housing 209. The top of each of the four components is rotatably connected to a locking plate 305. The locking plate 305 is used to engage with the locking groove 306 to fix the limiting post 303. The top of each of the multiple limiting posts 303 is provided with a locking groove 306. The bottom of each of the multiple locking plates 305 is engaged with the corresponding locking groove 306. The top of each of the multiple locking plates 305 is threaded with a bolt 307. The middle of the lifting hook 302 is provided with an anti-detachment component 308. The anti-detachment component 308 is used to prevent the heavy object from falling off the lifting hook 302 and to ensure the safety of lifting. Specifically, the hook housing 301 is used to install the lifting hooks 302 and is the core carrier connecting the lifting housing 209 and the lifting hooks 302. Two lifting hooks 302 are fixedly connected to the bottom of the hook housing 301. As the component that directly contacts the heavy object, it can stably hook the load. Multiple limiting posts 303 are slidably connected to the outer wall of the hook housing 301. The limiting posts 303 are used to insert into the lifting housing 209. Through the insertion and engagement with the lifting housing 209, the installation position of the hook housing 301 is initially defined to prevent lateral displacement during lifting. Multiple rotating shafts 304 are rotatably connected to the outer wall of the lifting housing 209, providing a fulcrum for the locking plate 305 and ensuring that the locking plate 305 can be flexibly rotated. Locking plates 305 are rotatably connected to the top of each of the multiple rotating shafts 304. The locking plate 305 is used to engage with the locking groove 306. When the locking plate 305 is flipped to the top of the limiting post 303, its bottom end is embedded in the locking groove 306, further fixing the limiting post 303 and strengthening the connection between the hook shell 301 and the lifting shell 209. The top of each of the multiple limiting posts 303 is provided with a locking groove 306 to provide an engagement point for the locking plate 305 and ensure the stability of the locking structure. The top of each of the multiple locking plates 305 is threaded with a bolt 307. By tightening the bolt 307, the locking plate 305 can be firmly fixed to the lifting shell 209 to prevent the locking from loosening due to vibration during the hoisting process. The middle of the lifting hook 302 is provided with an anti-detachment component 308. The anti-detachment component 308 is used to prevent the heavy object from falling off the lifting hook 302 and to ensure the safety of the hoisting.
[0020] Reference Figure 1 and Figure 3A control switch 4 is fixedly connected to the front side of the front mounting shell 201. The control switch 4 is electrically connected to the telescopic rod 202, the telescopic cylinder 204 and the hydraulic cylinder 211 respectively. A crash plate 5 is fixedly connected to the top of the top plate 203. Multiple crash pads 6 are fixedly connected to the top of the crash plate 5. Stabilizing plates 7 are fixedly connected to the front and rear sides of the bottom of the top plate 203. Multiple stabilizing columns 8 are fixedly connected to the adjacent side of the two stabilizing plates 7. The tops of the multiple stabilizing columns 8 are fixedly connected to the bottom of the top plate 203. Specifically, the control switch 4, which is electrically connected to the telescopic rod 202, the telescopic cylinder 204, and the hydraulic cylinder 211 respectively, enables the equipment to be opened and closed. The anti-collision plate 5 provides protection for the top plate 203 and the area above it, preventing the top plate 203 from directly colliding with objects above it when the equipment is moving or operating. The anti-collision pad 6 further buffers the impact force through its own elastic deformation, reducing the damage to the anti-collision plate 5 and the top plate 203, and enhancing the safety of the equipment in complex environments. The stabilizing plate 7 is used to enhance the connection stability between the top plate 203 and the structure below, and to share the pressure on the top plate 203. The top of the stabilizing column 8 is fixedly connected to the bottom of the top plate 203 to reinforce the connection between the stabilizing plate 7 and the top plate 203. Through multi-directional support, the force is distributed to prevent the top plate 203 from deforming due to load or vibration, ensuring the rigidity and stability of the overall structure.
[0021] Reference Figure 3 and Figure 5 The adjustment mechanism 2 also includes a rubber pad 213, the top of which is fixedly connected to the bottom of the support plate 212; the anti-detachment component 308 includes two spring shafts 3081, the front ends of which are rotatably connected to the middle of the corresponding lifting hooks 302, and the rear ends of which are rotatably connected to anti-detachment columns 3082; the replacement mechanism 3 also includes multiple gaskets 309, the inner walls of which are fixedly connected to the middle of bolts 307. Specifically, the rubber pad 213 is used to increase the friction between the support plate 212 and the ground, preventing the equipment from sliding during lifting operations. At the same time, it buffers vibrations through its own elasticity, avoiding direct hard contact between the support plate 212 and the ground, thus preventing wear and enhancing the stability of the support and the durability of the components. The spring shaft 3081 is used to provide elastic restoring force and support the rotation of the anti-detachment column 3082. Under the elastic force of the spring shaft 3081, the anti-detachment column 3082 fits against the opening of the lifting hook 302, preventing the heavy object from falling off and achieving anti-detachment protection during hoisting. The gasket 309 is used to distribute the pressure when the bolt 307 is tightened, preventing the bolt 307 from loosening or the locking plate 305 from deforming due to excessive local stress, thus enhancing the stability and durability of the bolt 307 connection.
[0022] Working principle: When operating a compact hand-operated hoist with a low headroom design, the top plate 203 can smoothly drive the components below to rise and fall synchronously through the drive at the top of the telescopic rod 202, thereby achieving adjustment of the lifting height. Whether it is low-altitude loading and unloading close to the top surface of the workbench 1, or meeting the needs of higher-position transfer within limited headroom, it can flexibly adapt and avoid operation restrictions caused by low space. With the drive of the telescopic cylinder 204, the displacement table 205 can drive the lifting chain 208 and the lifting shell 209 to slide horizontally, achieving lateral adjustment of the lifting position, improving the positional accuracy of lifting operations in low headroom scenarios, and allowing the equipment to switch between multiple work positions. It is more adaptable to complex workpiece hoisting scenarios. At the same time, during the lifting operation, the hydraulic cylinder 211 pushes the support plate 212 to extend downward and make close contact with the ground, which can provide stable support for the workbench 1, and evenly transfer the overall weight of the equipment and the hoisting load to the ground. This prevents the casters 210 from deforming or being damaged due to excessive load, and ensures that the heavy objects remain stable during the lifting process, preventing swaying or tipping. This series of adjustment and support mechanisms work together to give the compact hand chain hoist flexible operation capabilities in low headroom environments, and provides multiple guarantees in terms of structural stability and load safety, ensuring the flexibility, efficiency and safety of the lifting operation. Furthermore, when the hook shell 301 of the hand chain hoist needs to be replaced, the hook shell 301 can be disassembled by releasing the bolt 307 from the locking plate 305, flipping the locking plate 305, and sliding out the limiting post 303. Conversely, the new hook shell 301 can be installed by aligning it with the lifting shell 209, inserting the limiting post 303, flipping the locking plate 305, and fixing it with the bolt 307. This allows for quick disassembly and replacement of the hook shell 301. The entire operation can be completed without the need for additional tools, whether in a narrow space or a normal working environment. This avoids the problems of poor compatibility and cumbersome operation caused by the reliance on special tools in traditional replacement methods, shortens the replacement time, improves replacement efficiency, ensures that the equipment can quickly return to working status, and reduces the impact of downtime caused by component replacement.
[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A compact hand chain hoist with a low headroom design, comprising a workbench (1), characterized in that: The top of the workbench (1) is provided with an adjustment mechanism (2), which is used to adjust the position of the hand chain hoist. The top of the workbench (1) is provided with a replacement mechanism (3). The adjustment mechanism (2) includes two mounting shells (201). The bottom of each mounting shell (201) is fixedly connected to the top of the workbench (1). Two telescopic rods (202) are fixedly connected to the inner bottom walls of each mounting shell (201). A top plate (203) is fixedly connected to the top of each telescopic rod (202). A telescopic cylinder (204) is fixedly connected to the bottom of the top plate (203). A displacement platform (205) is slidably connected to the bottom of the telescopic cylinder (204). 5) The bottom is fixedly connected to a housing (206), the inside of the housing (206) is fixedly connected to a hand zipper (207), the inside of the housing (206) is fixedly connected to two lifting chains (208), the bottom of the lifting chain (208) is fixedly connected to a lifting shell (209), the bottom of the workbench (1) is fixedly connected to multiple casters (210), the bottom of the workbench (1) is fixedly connected to a hydraulic cylinder (211), and the bottom end of the hydraulic cylinder (211) is fixedly connected to a support plate (212).
2. The compact hand chain hoist with low headroom design according to claim 1, characterized in that: The replacement mechanism (3) includes a hook shell (301), the inner wall of which is slidably connected to the outer bottom wall of the lifting shell (209), two lifting hooks (302) are fixedly connected to the bottom of the hook shell (301), a plurality of limiting posts (303) are slidably connected to the outer wall of the hook shell (301), a plurality of rotating shafts (304) are rotatably connected to the outer wall of the lifting shell (209), a locking plate (305) is rotatably connected to the top of each of the plurality of rotating shafts (304), a locking groove (306) is opened at the top of each of the plurality of limiting posts (303), the bottom ends of the plurality of locking plates (305) are respectively engaged with the corresponding locking grooves (306), a bolt (307) is threadedly connected to the top of each of the plurality of locking plates (305), and an anti-detachment component (308) is provided in the middle of the lifting hook (302).
3. A compact hand chain hoist with a low headroom design according to claim 1, characterized in that: A control switch (4) is fixedly connected to the front side of the mounting shell (201). The control switch (4) is electrically connected to the telescopic rod (202), the telescopic cylinder (204), and the hydraulic cylinder (211).
4. A compact hand chain hoist with a low headroom design according to claim 1, characterized in that: The top of the top plate (203) is fixedly connected to a crash plate (5), and the top of the crash plate (5) is fixedly connected to a plurality of crash pads (6).
5. A compact hand chain hoist with a low headroom design according to claim 1, characterized in that: The top plate (203) is fixedly connected to the front and rear sides of the bottom with stabilizing plates (7), and multiple stabilizing columns (8) are fixedly connected to the adjacent sides of the two stabilizing plates (7). The tops of the multiple stabilizing columns (8) are fixedly connected to the bottom of the top plate (203).
6. A compact hand chain hoist with a low headroom design according to claim 1, characterized in that: The adjustment mechanism (2) also includes a rubber pad (213), the top of which is fixedly connected to the bottom of the support plate (212).
7. A compact hand chain hoist with a low headroom design according to claim 2, characterized in that: The anti-detachment component (308) includes two spring shafts (3081), the front ends of the two spring shafts (3081) are rotatably connected to the middle of the corresponding lifting hook (302), and the rear ends of the two spring shafts (3081) are rotatably connected to anti-detachment columns (3082).
8. A compact hand chain hoist with a low headroom design according to claim 2, characterized in that: The replacement mechanism (3) also includes a plurality of gaskets (309), the inner walls of which are respectively fixedly connected to the middle of the bolt (307).