Low-friction lifting mechanism
By using a low-friction cylinder and pulley block structure, combined with the design of fixed pulleys, movable pulleys and auxiliary wheels, the frictional resistance problem of the pneumatic balancer when lifting light loads is solved, improving the operator's experience and the stability of the equipment.
Patent Information
- Application Number
- CN202423267262.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing pneumatic balancers offer a poor operator experience when lifting lighter loads, mainly due to the high resistance of the cylinders and guide rods.
It adopts a low-friction cylinder and pulley block structure. By combining fixed pulleys and moving pulleys, the friction force when the cylinder starts is reduced. The design of auxiliary wheel and slide groove ensures smooth sliding of the pull rope. The auxiliary wheel restricts the position of the pull rope.
This reduces frictional resistance when lifting smaller loads, improves the operator's experience, and enhances the stability and labor-saving effect of the equipment.
Smart Images
Figure CN223534719U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material handling technology, and more specifically, to a low-friction lifting mechanism. Background Technology
[0002] A balance crane is a new type of material handling equipment. It uses a unique screw lifting mechanism to lift heavy objects and is a mechanical device that replaces manual labor to reduce labor intensity.
[0003] In existing technologies, typical pneumatic balancers control the lifting and lowering of materials via lifting buttons or by using ordinary cylinders with guide rods for lifting control. Pneumatic balance is achieved by using air circuit valves (the cylinder balances the load force). However, due to the high resistance of the cylinders and guide rods themselves, the experience is significantly better for operators with heavier loads of 20kg-150kg, but relatively poor for lighter loads below 20kg.
[0004] Therefore, a low-friction lifting mechanism is needed to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a low-friction lifting mechanism to solve the problems mentioned in the background art.
[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:
[0007] A low-friction lifting mechanism includes a slide rail and a lifting assembly that slides along the length of the slide rail. The lifting assembly includes a receiving box, a cylinder, a fixed pulley, and a movable pulley. The cylinder is fixedly connected inside the receiving box. The movable pulley is connected to the telescopic end of the cylinder. The fixed pulley is located at the other end of the cylinder. A pull rope is wound around both the fixed pulley and the movable pulley. One end of the pull rope is fixedly connected to the fixed pulley. The other end of the pull rope passes over the surfaces of the movable pulley and the fixed pulley and extends out of the receiving box to form a connecting part.
[0008] The technical solution of this utility model is further configured as follows: a sliding groove is provided on both side walls of the receiving box, and the movable pulley slides along the length direction of the sliding groove through an auxiliary wheel. The auxiliary wheel is coaxially arranged with the movable pulley and located on both sides of it.
[0009] The technical solution of this utility model is further configured as follows: the telescopic end of the cylinder is connected to the rotating shaft of the movable pulley through a connector, and a plurality of auxiliary wheels are rotatably connected to the connector, the auxiliary wheels abutting against the inner sidewall of the receiving box.
[0010] The technical solution of this utility model is further configured as follows: the number of the movable pulley and the fixed pulley is greater than or equal to two, one fixed pulley and one movable pulley constitute a pulley group, the pull rope on one pulley group extends out of the receiving box, and the pull ropes on the remaining pulley groups are looped around the pulley group.
[0011] The technical solution of this utility model is further configured as follows: a fixing member is fixedly connected to the bottom surface of the container, and four auxiliary wheels are rotatably connected to the fixing member. The four auxiliary wheels are arranged in a cross shape, and the other end of the pull rope extends out from between the four auxiliary wheels.
[0012] The technical solution of this utility model is further configured such that: the receiving box slides along the length direction of the slide rail via a set of sliding wheels, the set of sliding wheels includes four sliding wheels, the two sliding wheels located in the center are higher than the two sliding wheels located at the edges.
[0013] The technical solution of this utility model is further configured such that: a control box is fixedly connected to the lower part of the receiving box, and the control box is located at the end of the receiving box away from the connecting part.
[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:
[0015] By setting fixed and movable pulleys at both ends of the cylinder, when the cylinder is started, its telescopic end can push the movable pulley while the pull rope extending from the receiving box is pulled upward along the fixed pulley. This achieves the effect of saving effort and reducing resistance, avoiding the need to overcome large resistance when lifting a small load. In addition, the setting of multiple pairs of pulleys also makes the rotation of the fixed and movable pulleys more stable, enabling the connection part to achieve a stable lifting effect.
[0016] By setting auxiliary wheels one and two, when the movable pulley is pushed to rotate by the extension end of the cylinder, it can slide smoothly along the inner wall of the slide groove and the receiving box, so that the movement of the pull rope is uniform and fast, making the lifting mechanism more stable in use. The auxiliary wheel three set below the receiving box can restrict the pull rope forming the connection part, so that it rises stably and does not deviate from the position. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;
[0018] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;
[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0020] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 3 ;
[0021] Figure 5 for Figure 4 Enlarged view of point B in the middle.
[0022] In the diagram: 1. Slide rail; 2. Receiving box; 3. Cylinder; 4. Fixed pulley; 5. Moving pulley; 6. Pull rope; 7. Connecting part; 8. Slide groove; 9. Auxiliary wheel one; 10. Connecting piece; 11. Auxiliary wheel two; 12. Fixing piece; 13. Auxiliary wheel three; 14. Sliding wheel group; 15. Control box. Detailed Implementation
[0023] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model. Example
[0024] refer to Figures 1 to 5 As shown, this utility model provides a low-friction lifting mechanism, including a slide rail 1 and a lifting assembly that slides along the length of the slide rail 1. The lifting assembly includes a receiving box 2, a cylinder 3, a fixed pulley 4, and a movable pulley 5. The cylinder 3 is a customized low-friction cylinder with a large exhaust port diameter, which can reduce the resistance of air flow back. The cylinder 3 is fixedly connected inside the receiving box 2. The movable pulley 5 is connected to the telescopic end of the cylinder 3. The fixed pulley 4 is located at the other end of the cylinder 3. A pull rope 6 is wound on both the fixed pulley 4 and the movable pulley 5. One end of the pull rope 6 is fixedly connected to the fixed pulley 4. The other end of the pull rope 6 passes through the surfaces of the movable pulley 5 and the fixed pulley 4 and extends out from inside the receiving box 2 to form a connecting part 7.
[0025] refer to Figures 1 to 5 As shown, the number of movable pulleys 5 and fixed pulleys 4 is greater than or equal to two. One fixed pulley 4 and one movable pulley 5 constitute a pulley group. The pull rope 6 on one pulley group extends out of the receiving box 2 to form the connecting part 7. The pull ropes 6 on the other pulley groups are looped around the pulley group. With the above structure, when the cylinder 3 is started, its telescopic end can push the movable pulley 5 while the pull rope 6 extending out of the receiving box 2 is pulled upward along the fixed pulley 4, thereby achieving the effect of saving effort and reducing resistance. This avoids the situation where it is still necessary to overcome a large resistance when lifting a small load. In addition, the setting of multiple pairs of pulleys and pull ropes 6 also makes the rotation of the fixed pulley 4 and the movable pulley 5 more stable, enabling the connecting part 7 to achieve a stable lifting effect.
[0026] refer to Figures 1 to 5 As shown, grooves 8 are provided on both side walls of the receiving box 2. The movable pulley 5 slides along the length of the groove 8 via auxiliary wheels 9. The auxiliary wheels 9 are coaxially arranged with the movable pulley 5 and located on both sides of it. The telescopic end of the cylinder 3 is connected to the rotating shaft of the movable pulley 5 via a connector 10. Several pairs of auxiliary wheels 11 are rotatably connected to the connector 10. The auxiliary wheels 11 abut against the inner side wall of the receiving box 2. A fixing member 12 is fixedly connected to the bottom surface of the receiving box 2. Four auxiliary wheels 13 are rotatably connected to the fixing member 12. The three auxiliary wheels 13 are arranged in a cross shape. The pull rope 6 forming the connecting part 7 extends from between the four auxiliary wheels 13. With the above structure, when the movable pulley 5 is pushed to rotate by the telescopic end of the cylinder 3, it can slide smoothly along the slide groove 8 and the inner wall of the receiving box 2, so that the movement of the pull rope 6 is uniform and fast, making the lifting mechanism more stable in use. The auxiliary wheels 13 set below the receiving box 2 can restrict the pull rope 6 forming the connecting part 7, so that it rises stably and does not deviate from its position.
[0027] refer to Figures 1 to 5 As shown, the container 2 slides along the length of the slide rail 1 via the sliding wheel set 14. The sliding wheel set 14 includes four sliding wheels, with the two sliding wheels in the center being higher than the two sliding wheels on the edge. Through the above structure, when the four sliding wheels on the sliding wheel set 14 move and rotate along the inside of the slide rail 1, they can ensure that they abut against the inner top and inner bottom surfaces of the slide rail 1, thereby ensuring the stable movement of the container 2 and allowing the lifting mechanism to operate smoothly.
[0028] refer to Figures 1 to 5 As shown, a control box 15 is fixedly connected to the lower part of the receiving box 2. The control box 15 is located at the end of the receiving box 2 away from the connecting part 7 and is electrically connected to the sliding wheel group 14 and the cylinder 3. With the above structure, the control box 15 occupies little space while making it easy to control the sliding wheel group 14 and the cylinder 3, thereby achieving the effect of controlling the movement position of this lifting mechanism or driving the load to rise.
[0029] refer to Figures 1 to 5 As shown above, this lifting mechanism, while employing a low-friction cylinder 3, also uses a pulley system to significantly reduce the frictional resistance of the cylinder 3 and the overall operation. This results in a smaller resistance to the cylinder 3 when lifting loads below 20kg, thereby enhancing the operator's experience under low load conditions and reducing the operator's labor intensity.
[0030] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A low-friction lifting mechanism, comprising a slide rail (1) and a lifting assembly sliding along the length of the slide rail (1), characterized in that: The lifting assembly includes a receiving box (2), a cylinder (3), a fixed pulley (4), and a movable pulley (5). The cylinder (3) is fixedly connected inside the receiving box (2). The movable pulley (5) is connected to the telescopic end of the cylinder (3). The fixed pulley (4) is located at the other end of the cylinder (3). A pull rope (6) is wound around both the fixed pulley (4) and the movable pulley (5). One end of the pull rope (6) is fixedly connected to the fixed pulley (4). The other end of the pull rope (6) passes through the surfaces of the movable pulley (5) and the fixed pulley (4) and extends out from inside the receiving box (2) to form a connecting part (7).
2. The low-friction lifting mechanism according to claim 1, characterized in that: The receiving box (2) has grooves (8) on both side walls. The movable pulley (5) slides along the length of the groove (8) via an auxiliary wheel (9). The auxiliary wheel (9) is coaxial with the movable pulley (5) and located on both sides of it.
3. The low-friction lifting mechanism according to claim 1, characterized in that: The telescopic end of the cylinder (3) is connected to the rotating shaft of the movable pulley (5) through the connector (10). Several pairs of auxiliary wheels (11) are rotatably connected to the connector (10). The auxiliary wheels (11) abut against the inner sidewall of the receiving box (2).
4. The low-friction lifting mechanism according to claim 1, characterized in that: The number of the movable pulley (5) and the fixed pulley (4) is greater than or equal to two. One fixed pulley (4) and one movable pulley (5) constitute a pulley group. The pull rope (6) on one pulley group extends out of the receiving box (2), and the pull ropes (6) on the remaining pulley groups are looped around the pulley group.
5. The low-friction lifting mechanism according to claim 1, characterized in that: The bottom surface of the container (2) is fixedly connected to a fixing member (12), and four auxiliary wheels (13) are rotatably connected to the fixing member (12). The four auxiliary wheels (13) are arranged in a cross shape, and the other end of the pull rope (6) extends out from between the four auxiliary wheels (13).
6. The low-friction lifting mechanism according to claim 1, characterized in that: The container (2) slides along the length of the slide rail (1) via a set of sliding wheels (14), which includes four sliding wheels, with the two sliding wheels in the center being higher than the two sliding wheels on the edge.
7. The low-friction lifting mechanism according to claim 1, characterized in that: A control box (15) is fixedly connected to the lower part of the container (2), and the control box (15) is located at the end of the container (2) away from the connecting part (7).