A jack with a lifting handle and a three-position limiting device
By designing a jack with a lifting handle and a three-position limit device, and utilizing the power-assist mechanism and mechanical principles, the problem of the difficulty in adjusting the length of the traditional jack handle has been solved. This achieves flexible adjustment of the handle length and stable and reliable three-position limit, improving efficiency and saving effort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAXING JINCHENG AUTOPARTS TECH CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional jacks have difficulty adjusting the length of their handles, resulting in a fixed lever arm. Operators need to apply more force to lift heavy objects, which can lead to fatigue during prolonged operation. Furthermore, the handles are not easy to hold with both hands and may exceed the reach of human hands, making it impossible to lift heavy objects smoothly.
A jack with a lifting handle and a three-position limit device was designed. The lever arm length is increased by the assist mechanism. The elastic potential energy of the spring and the lever principle are used to realize simple adjustment of the handle length and three-position limit. The jack includes the cooperation of the first pressure rod, the second pressure rod, the pressing handle, the insertion rod and the slot, as well as the knob and gear meshing structure, which simplifies the operation steps.
It improves efficiency, reduces operational difficulty, and enables flexible adjustment of handle length and stable and reliable three-position limit, meeting the height requirements of different usage scenarios and enhancing labor-saving effect and convenience.
Smart Images
Figure CN224279623U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of jack technology, and in particular to a jack with a lifting handle and a three-position limiting device. Background Technology
[0002] A jack is a small lifting device that uses a rigid lifting component as its working device. It lifts heavy objects within its stroke through a top support or bottom claw. Based on Pascal's law, which states that the pressure is uniform throughout a liquid, a small piston applies a small pressure, which generates a large pressure on a large piston, thus transmitting force and lifting the heavy object. By reciprocating the lever, the claw pushes the ratchet to rotate, and the small bevel gear drives the large bevel gear, which in turn rotates the lifting screw, allowing the lifting sleeve to rise or fall, thus achieving the lifting and pulling function.
[0003] Traditional jacks have handles that are difficult to adjust in length. This means that the lever arm is fixed. When lifting heavy objects, the lever arm cannot be increased. According to the lever principle, the operator needs to apply more force to achieve the lifting purpose. This can easily lead to fatigue during prolonged operation. In addition, traditional handles are not convenient to hold with both hands and may exceed the reach of human hands in some situations, making it impossible to lift heavy objects smoothly. Utility Model Content
[0004] The purpose of this utility model is to provide a jack with a lifting handle and a three-position limiting device, which can solve the problem that the handle length of traditional jacks is difficult to adjust. The difficulty in adjusting the handle length means that the lever arm is fixed. When lifting heavy objects, since the lever arm cannot be increased, according to the lever principle, the operator needs to apply more force to achieve the lifting purpose. Prolonged operation can easily cause fatigue. In addition, the traditional handle is not convenient to hold with both hands, and in some cases it may exceed the range of human reach, resulting in the inability to lift heavy objects smoothly.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a jack with a lifting handle and a three-position limiting device, including a jack body and an assist mechanism disposed on one side of the jack body. The length of the assist mechanism can be increased to increase the distance between the force receiving point at one end and the force application point at the other end of the assist mechanism, thereby saving more effort.
[0006] In a preferred embodiment, the assist mechanism includes a first pressure rod, which is fixedly connected to the outer side of one end of the jack body. A second pressure rod is sleeved on the outer side of the first pressure rod. A pressing handle is rotatably connected to the inner side of one end of the second pressure rod. A toggle head is fixedly connected to the outer side of one end of the pressing handle. A plug is slidably connected to the inner side of one end of the second pressure rod. The toggle head is disposed on the inner side of one end of the plug. A plurality of slots are evenly provided on the inner side of one end of the first pressure rod.
[0007] In a preferred embodiment, a spring is fixedly connected to the outer side of one end of the pressing handle, and the outer side of one end of the spring is fixedly connected to the outer side of one end of the second pressing rod.
[0008] In a preferred embodiment, the outer end of the insertion rod is disposed on the inner side of the slot.
[0009] In a preferred embodiment, an assisting component is provided on the outer side of one end of the second pressure rod. The assisting component includes a mounting box, a gear is rotatably connected to the inner side of the end of the mounting box, a toothed rod is slidably connected to the inner side of both ends of the mounting box, and a connecting rod is fixedly connected to the outer side of one end of the toothed rod.
[0010] In a preferred embodiment, an arc-shaped plate is fixedly connected to the outer side of one end of the connecting rod, and one side of the arc-shaped plate has an arc-shaped structure.
[0011] In a preferred embodiment, a handle is fixedly connected to the outer side of one end of the mounting box.
[0012] In a preferred embodiment, a knob is rotatably connected to one side of the mounting box, and one end of the knob is fixedly connected to one side of the gear.
[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In use, pressing the pressing handle compresses the spring to store elastic potential energy, and then easily pulling the second pressing rod adjusts the insertion rod to align with the slots at different positions. The whole process is simple to operate, requiring no complicated tools or cumbersome steps. The release of the spring's elastic potential energy drives the pressing handle to rotate, which in turn drives the actuating head to quickly push the insertion rod into the slot, enabling rapid length adjustment and improving efficiency. Through the cooperation of the insertion rod with slots at different positions, three-position limit can be achieved, accurately adjusting the jack to the required length to meet the height requirements of different usage scenarios. This design utilizes simple mechanical principles, such as the storage and release of elastic potential energy and the lever principle, to achieve relatively complex functions. The structure is relatively simple and stable, with high reliability. Attached Figure Description
[0014] Figure 1 A schematic diagram of the main structure of a jack with a lifting handle and a three-position limiting device provided by this utility model;
[0015] Figure 2 A schematic diagram of the structure of the first and second pressure rods in a jack with a lifting handle and a three-position limiting device provided by this utility model;
[0016] Figure 3 A cross-sectional view of the mounting box of a jack with a lifting handle and a three-position limiting device provided for this utility model;
[0017] Figure 4 A schematic diagram of the arc-shaped plate and handle in a jack with a lifting handle and a three-position limiting device provided by this utility model;
[0018] Figure 5 This utility model provides a jack with a lifting handle and a three-position limiting device. Figure 2 Enlarged view of point A in the middle.
[0019] Legend:
[0020] 1. Jack body;
[0021] 2. Assist mechanism; 21. First pressure lever; 22. Second pressure lever; 23. Press handle; 24. Actuating head; 25. Insert rod; 26. Slot; 27. Spring; 28. Mounting box; 29. Gear; 210. Gear rack; 211. Connecting rod; 212. Arc plate; 213. Handle; 214. Knob. Detailed Implementation
[0022] 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.
[0023] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a jack with a lifting handle and a three-position limiting device, including a jack body 1 and an assist mechanism 2 disposed on one side of the jack body 1. The length of the assist mechanism 2 can be increased to increase the distance between the force-bearing point at one end and the force-applying point at the other end, thereby saving more effort. The assist mechanism 2 includes a first pressure rod 21, which is fixedly connected to the outer side of one end of the jack body 1. A second pressure rod 22 is sleeved on the outer side of the first pressure rod 21. A pressing handle 23 is rotatably connected to the inner side of one end of the second pressing rod 22. A toggle head 24 is fixedly connected to the outer side of one end of the pressing handle 23. A plug rod 25 is slidably connected to the inner side of one end of the second pressing rod 22. The toggle head 24 is located on the inner side of one end of the plug rod 25. Multiple slots 26 are evenly opened on the inner side of one end of the first pressing rod 21. A spring 27 is fixedly connected to the outer side of one end of the pressing handle 23. The outer side of one end of the spring 27 is fixedly connected to the outer side of one end of the second pressing rod 22. The outer side of the end of the plug rod 25 is located on the inner side of the slot 26.
[0024] When using the device, the user can press the pressing handle 23, which compresses the spring 27 and stores its elastic potential energy. At this time, the actuating head 24 can push the insert rod 25 out through the through groove on one side, thereby pulling the insert rod 25 out from the inside of the slot 26. Then, the user can pull the second pressing rod 22 to align the insert rod 25 with other slots 26. Releasing the pressing handle 23 releases the elastic potential energy of the spring 27, which in turn pushes the pressing handle 23 to rotate. As the pressing handle 23 rotates, it also rotates the other end of the pressing handle 23 inward, allowing the actuating head 24 to push the insert rod 25 into the inside of the slot 26. This completes the adjustment of the length of the assist mechanism 2. The user can compress the spring 27 by pressing the pressing handle 23. By storing elastic potential energy, the second lever 22 can be easily pulled to adjust the insertion rod 25 to align with the slots 26 at different positions. The entire process is simple to operate, requiring no complicated tools or cumbersome steps. The release of elastic potential energy from the spring 27 drives the pressing handle 23 to rotate, which in turn drives the actuating head 24 to quickly push the insertion rod 25 into the inner side of the slot 26, enabling rapid length adjustment and improving efficiency. Through the cooperation of the insertion rod 25 with slots 26 at different positions, three-position limit can be achieved, accurately adjusting the jack to the required length to meet the height requirements of different usage scenarios. This design utilizes simple mechanical principles, such as the storage and release of elastic potential energy and the lever principle, to achieve relatively complex functions. The structure is relatively simple and stable, with high reliability.
[0025] like Figure 1 - Figure 5 As shown, an assisting component is provided on the outer side of one end of the second pressure rod 22. The assisting component includes a mounting box 28. A gear 29 is rotatably connected to the inner side of the end of the mounting box 28. A gear 210 is slidably connected to the inner sides of both ends of the mounting box 28. A connecting rod 211 is fixedly connected to the outer side of one end of the gear 210. An arc-shaped plate 212 is fixedly connected to the outer side of one end of the connecting rod 211. One side of the arc-shaped plate 212 has an arc-shaped structure. A handle 213 is fixedly connected to the outer side of one end of the mounting box 28. A knob 214 is rotatably connected to one side of the mounting box 28. The outer side of one end of the knob 214 is fixedly connected to one side of the gear 29.
[0026] The user can rotate knob 214, which drives gear 29 to rotate. As gear 29 rotates, it engages with one side of rack 210, pushing the two racks 210 outward. This, in turn, drives the arc plate 212 outward at both ends via connecting rod 211. The user can press the two connecting rods 211 with both hands for assistance. When the connecting rods 211 are not needed, the user can press the handle 213. The user can rotate knob 214 to drive gear 29 to rotate, which, through the engagement, pushes the two racks 210 outward, thus pushing the arc plate 212 outward at both ends. The user can press the connecting rods 211 with both hands for assistance. The operation is flexible and achieves a labor-saving effect through the mechanical structure, reducing the difficulty of operation. When the connecting rods 211 are not needed, the user can press the handle 213 to facilitate the storage or reset of related parts, making it convenient for storing the jack and preparing for the next use, thus improving the convenience of use and the practicality of the device.
[0027] Working principle: When using the device, the user can press the pressing handle 23, which compresses the spring 27 and stores elastic potential energy. At this time, the actuating head 24 can push the insert rod 25 out through the through groove on one side, thereby driving the insert rod 25 out of the slot 26. Then, the user can pull the second pressing rod 22 to align the insert rod 25 with other slots 26. Releasing the pressing handle 23 releases the elastic potential energy of the spring 27, which in turn pushes the pressing handle 23 to rotate. As the pressing handle 23 rotates, it also drives the other end of the pressing handle 23 to rotate inward, thus allowing the actuating head 24 to push the insert rod 25 out of the slot 26. 5. Pushing the rod into the inner side of slot 26 completes the length adjustment of the assist mechanism 2. The user can compress the spring 27 by pressing the press handle 23 to store elastic potential energy, and then easily pull the second pressure rod 22 to adjust the insertion rod 25 to align with different positions of slot 26. The whole process is simple to operate, requiring no complicated tools or cumbersome steps. The release of the elastic potential energy of the spring 27 pushes the press handle 23 to rotate, which in turn drives the actuating head 24 to quickly push the insertion rod 25 into the inner side of slot 26, which can quickly complete the length adjustment and improve the efficiency of use. Through the cooperation of the insertion rod 25 with different positions of slot 26, three-level limit can be achieved, accurately Adjusting the jack to the required length to meet the height requirements of different usage scenarios, this design utilizes simple mechanical principles, such as the storage and release of elastic potential energy and the lever principle, to achieve relatively complex functions. The structure is relatively simple and stable, with high reliability. Users can rotate knob 214, which drives gear 29 to rotate. Simultaneously, gear 29, through its meshing connection with one side of rack 210, pushes the two racks 210 outwards, which in turn drives the arc-shaped plate 212 outwards at both ends via connecting rod 211. Users can press the two connecting rods 211 with both hands for assistance. When the connecting rod 211 is needed, it can be pressed by the handle 213. The user can rotate the knob 214 to drive the gear 29 to rotate, and use the meshing connection to push the two racks 210 to move outward, thereby driving the arc plate 212 to push outward at both ends. The connecting rod 211 can be pressed with both hands for assistance. The operation is flexible and achieves a labor-saving effect with the help of mechanical structure, reducing the difficulty of operation. When the connecting rod 211 is not needed, it can be pressed by the handle 213 to facilitate the storage or reset of related parts, which is convenient for the storage of the jack and the preparation before the next use, improving the convenience of use and the practicality of the device.
[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.
Claims
1. A jack with a lifting handle and a three-position limiting device, comprising a jack body (1), characterized in that: It also includes an assist mechanism (2) disposed on one side of the jack body (1). The assist mechanism (2) is used to adjust the distance between the force receiving point at one end and the force application point at the other end of the assist mechanism (2). The assist mechanism (2) includes a first pressure rod (21). The first pressure rod (21) is fixedly connected to the outer side of one end of the jack body (1). A second pressure rod (22) is sleeved on the outer side of the first pressure rod (21). A pressing handle (23) is rotatably connected to the inner side of one end of the second pressure rod (22). A toggle head (24) is fixedly connected to the outer side of one end of the pressing handle (23). A plug rod (25) is slidably connected to the inner side of one end of the second pressure rod (22). The toggle head (24) is disposed on the inner side of one end of the plug rod (25). A plurality of slots (26) are evenly opened on the inner side of one end of the first pressure rod (21). A spring (27) is fixedly connected to the outer side of one end of the pressing handle (23). The outer side of one end of the spring (27) is fixedly connected to the outer side of one end of the second pressure rod (22).
2. A jack with a lifting handle and a three-position limiting device according to claim 1, characterized in that: The outer end of the insertion rod (25) is located on the inner side of the slot (26).
3. A jack with a lifting handle and a three-position limiting device according to claim 1, characterized in that: An assisting component is provided on the outer side of one end of the second pressure rod (22). The assisting component includes a mounting box (28). A gear (29) is rotatably connected to the inner side of the end of the mounting box (28). A rack (210) is slidably connected to the inner side of both ends of the mounting box (28). A connecting rod (211) is fixedly connected to the outer side of one end of the rack (210).
4. A jack with a lifting handle and a three-position limiting device according to claim 3, characterized in that: An arc-shaped plate (212) is fixedly connected to the outer side of one end of the connecting rod (211), and one side of the arc-shaped plate (212) has an arc-shaped structure.
5. A jack with a lifting handle and a three-position limiting device according to claim 4, characterized in that: A handle (213) is fixedly connected to the outer side of one end of the mounting box (28).
6. A jack with a lifting handle and a three-position limiting device according to claim 4, characterized in that: A knob (214) is rotatably connected to one side of the mounting box (28), and one end of the knob (214) is fixedly connected to one side of the gear (29).