A lifting system including a hinge mechanism
By improving the design of the hinge mechanism, utilizing the lever principle and replaceable inserts, the problems of hinge mechanism damage and large jack specifications were solved, achieving high reliability and compactness of the lifting system, and adapting to different lifting needs.
Patent Information
- Application Number
- CN202522614040.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-09
AI Technical Summary
In existing lifting systems, the hinge mechanism can easily damage the special plate or ground, affecting the system's compactness and ease of movement. It also requires a large force and a large jack, making it difficult to adapt to different lifting needs.
A lifting system incorporating a hinge mechanism was designed. By utilizing the lever principle and the cooperation of the pawl and insert, the size and force requirements of the jack are reduced, thereby enhancing the system's compactness and adaptability. The system employs a replaceable insert and pawl design to accommodate different lifting needs.
The system's reliability and lifespan have been improved, the jack size has been reduced to accommodate lower ground clearance, manufacturing simplicity has been maintained, and different lifting needs have been met.
Smart Images
Figure CN224942298U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive repair equipment, specifically to a lifting system including a hinge device. Background Technology
[0002] A lifting system is a device used to lift heavy objects relative to the ground in order to facilitate the performance of related operations on the heavy objects, such as making it easier to grab the heavy objects or to access them for maintenance work.
[0003] In the automotive industry, lifting systems (also known as lift platforms) are used to raise vehicles to access mechanical components located under the engine or vehicle floor. A lifting system has been developed for this purpose. When the support structure is in a low position (i.e., not supporting the vehicle), the system has a relatively small height and volume. Such lifting systems include an operating device integrating the following components: an outer scissor bracket, an inner scissor bracket hinged relative to the outer scissor bracket, at least one jack located between the outer and inner scissor brackets, and each jack extending at an angle of 3° to 5° to the ground when the support structure is in a low position. Therefore, jacks with significant force are required to lift the vehicle while the support structure is supporting it. In fact, the closer the jack is to a horizontal position, the greater the force required. In other words, to lift the support structure when it is in a low position and the jacks (or multiple jacks) are roughly horizontal, the size of the jacks (or multiple jacks) needs to be increased. This process occurs in the first few centimeters of the lift, and the corresponding area is called the platform's "lift zone".
[0004] To reduce the size (i.e., specifications) of the jacks used, a known practice is to equip the lifting system with a hinge device. This device reduces the force required by the jacks (or each jack) as the support structure moves from a lower to a higher position (i.e., within the lifting zone).
[0005] Typically, this hinge mechanism includes a connecting rod. The connecting rod is rotatably mounted on an inner scissor bracket, with its free end either resting on the ground or on a special plate fixedly connected to the outer scissor bracket. A jack is then connected to the connecting rod to rotate it.
[0006] When the piston rod of the jack (or each jack) extends, the free end of the connecting rod rotates under the action of the jack (or each jack) and is supported on the ground or a special plate, thus creating a lever effect that lifts the support structure relative to the ground. This lever effect increases the force provided by the jack (or each jack), thereby reducing its required size.
[0007] However, these hinge mechanisms are not entirely satisfactory.
[0008] In fact, repeated use of a dedicated support plate when the linkage is supported can easily damage the plate, necessitating frequent replacement. To avoid this, a reinforcement plate can be used, but such plates can affect the compactness of the lifting system when the support structure is low, or its ease of movement when the lifting system is equipped with moving parts such as rollers. When the linkage is supported on the ground, the ground must be free of bumps or impurities, as these can obstruct linkage movement and prevent the vehicle from being lifted. Furthermore, the vehicle's weight transmitted to the ground through the linkage creates stress concentration; insufficient ground strength can damage the surface.
[0009] To address the aforementioned issues, we have made a series of improvements. Utility Model Content
[0010] The purpose of this invention is to provide a lifting system including a hinge device to overcome the above-mentioned shortcomings and deficiencies of the prior art.
[0011] A lifting system including a hinge device includes: a support structure, an operating device, and a hinge device, wherein the support structure is connected to the upper part of the operating device, and the hinge device is connected to the operating device.
[0012] The hinge device includes: a spacer, a rod, a claw, a stop, a limiting member, a bearing block, an ear, a base, an insert, a screw, and a threaded rod. The rod is connected to both sides of the spacer and to an operating device. The claw is engaged with the insert and connected to the rod via the threaded rod. The stop is connected to the operating device. The limiting member is connected to the rod and contacts the stop. The bearing block is connected to the limiting member and connected to the spacer via a screw. The ear is connected to the limiting member and to the operating device. The base is connected to the insert.
[0013] Furthermore, the support structure includes: a platform, a bracket, and a pad, wherein the platform is connected to the upper part of the operating device, the bracket is connected to the platform, and the pad is connected to the upper part of the bracket.
[0014] Furthermore, the operating device includes: an outer shear support, an inner shear support, and a jack. The outer and inner shear supports are connected to the support structure. The inner shear support is hinged to the outer shear support. The outer shear support is connected to a hinge device. The inner shear support is connected to a rod and a stop block. The jack is located between the outer and inner shear supports.
[0015] Furthermore, the jack includes: a cylinder body and a piston rod, the piston rod being slidably connected to the inside of the cylinder body, the cylinder body being connected to an outer shear bracket, the piston rod being connected to an inner shear bracket, and the piston rod being connected to a lug.
[0016] The beneficial effects of this utility model are:
[0017] Compared with traditional technology, the force of this invention is borne by the tubular cross-section of the external shear support, rather than the central plate or the ground, which greatly improves the system reliability and service life. Secondly, by adding a hinge device, the system becomes more compact, allowing the use of smaller jacks and adapting to lower ground clearance. At the same time, the replaceable inserts and claw design make the system highly adaptable, able to meet different lifting needs, while maintaining ease of manufacturing. Attached image description:
[0018] Figure 1 This is a schematic diagram of the supporting structure of this utility model in a high position.
[0019] Figure 2 This is a schematic diagram of the supporting structure of this utility model in a low position.
[0020] Figure 3 This is a schematic diagram of the hinge device of this utility model.
[0021] Figure 4 This is a partial structural schematic diagram of the present invention.
[0022] Figure 5 This is a cross-sectional view of the support structure of this utility model at a low position.
[0023] Figure 6 This is a cross-sectional view of the support structure of this utility model between the low and middle positions.
[0024] Figure 7 This is a cross-sectional view of the support structure of this utility model in the middle position.
[0025] Figure 8 This is a cross-sectional view of the support structure of this utility model at a high position.
[0026] Figure label:
[0027] Support structure 100, platform 110, bracket 120 and pad 130.
[0028] Operating device 200, external shear support 210, internal shear support 220, jack 230, cylinder 231 and piston rod 232.
[0029] Hinge 300, spacer 310, rod 320, claw 330, stop 340, limiter 350, bearing block 360, lug 370, base 380, insert 390, screw 3100 and threaded rod 3200. Detailed Implementation
[0030] The present invention will be further described below with reference to specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.
[0031] Example 1
[0032] Figure 1 This is a schematic diagram of the supporting structure of this utility model in a high position. Figure 2 This is a schematic diagram of the supporting structure of this utility model in a low position. Figure 3 This is a schematic diagram of the hinge device of this utility model. Figure 4 This is a partial structural schematic diagram of the present invention. Figure 5 This is a cross-sectional view of the support structure of this utility model at a low position. Figure 6 This is a cross-sectional view of the support structure of this utility model between the low and middle positions. Figure 7 This is a cross-sectional view of the support structure of this utility model in the middle position. Figure 8 This is a cross-sectional view of the support structure of this utility model at a high position.
[0033] like Figure 1-8 As shown, a lifting system including a hinge device includes: a support structure 100, an operating device 200 and a hinge device 300, wherein the support structure 100 is connected to the upper part of the operating device 200 and the hinge device 300 is connected to the operating device 200.
[0034] The hinge device 300 includes: a spacer 310, a rod 320, a claw 330, a stop block 340, a limiting member 350, a bearing block 360, an ear piece 370, a base 380, an insert 390, a screw 3100, and a threaded rod 3200. The rod 320 is connected to both sides of the spacer 310 and is connected to the operating device 200. The claw 330 is engaged with the insert 390 and is connected via the threaded rod. 3200 is connected to rod 320, stop block 340 is connected to operating device 200, limit member 350 is connected to rod 320, stop block 340 is in contact with limit member 350, bearing block 360 is connected to limit member 350, bearing block 360 is connected to spacer 310 by screw 3100, ear piece 370 is connected to limit member 350, ear piece 370 is connected to operating device 200, and base 380 is connected to insert 390.
[0035] The support structure 100 includes a platform 110, a bracket 120, and a pad 130. The platform 110 is connected to the upper part of the operating device 200, the bracket 120 is connected to the platform 110, and the pad 130 is connected to the upper part of the bracket 120.
[0036] The operating device 200 includes an outer shear support 210, an inner shear support 220, and a jack 230. The outer shear support 210 and the inner shear support 220 are connected to the support structure 100. The inner shear support 220 is hinged to the outer shear support 210. The outer shear support 210 is connected to the hinge device 300. The inner shear support 220 is connected to the rod 320 and the stop block 340. The jack 230 is located between the outer shear support 210 and the inner shear support 220.
[0037] The jack 230 includes a cylinder 231 and a piston rod 232. The piston rod 232 is slidably connected to the inside of the cylinder 231. The cylinder 231 is connected to the outer scissor bracket 210. The piston rod 232 is connected to the inner scissor bracket 220. The piston rod 232 is connected to the lug 370.
[0038] The principle of this invention: The hinge device 300 only functions when the support structure 100 is in the low position or the middle position. When the support structure 100 is in the low position (i.e., close to the ground), the jack 230 is approximately parallel to the support structure 100 and the ground. Here, "approximately" means that the angle between the jack and the support structure can be between 0° and 3° (inclusive). This structure can minimize the volume of the lifting system, especially the volume in the height direction (along the Z-axis), ensuring the adaptability of the lifting system. Even vehicles with low ground clearance can be easily parked on the support structure 100 without friction. When the support structure 100 is in the low position, the pawl 330 contacts the sliding track of the insert 390, but applies very little force, or even no force, to it. As a variant, when the support structure 100 is in the low position, the pawl 330 can also completely disengage from the sliding track of the insert 390. Furthermore, the design of the bearing block 360 allows the lug 370 to be positioned above the rotation axis of the cam (which is composed of a spacer 310, a rod 320, and a pawl 330) (relative to the ground, along the Z-axis). In this way, when the piston rod 232 of the jack 230 extends, it will inevitably drive the cam to rotate.
[0039] As the support structure moves from the lower position to the middle position, the piston rod 232 of the jack 230 extends from the cylinder 231. When the piston rod 232 extends, it causes the hinge device 300 to rotate about the axis of rotation of the rod 320. Simultaneously, the extension of the piston rod 232 causes the support structure 100 to move to a higher position (i.e., along the Z-axis). During the extension of the piston rod 232, the pawl 330 rotates about the axis of rotation and slides on the sliding track of the insert 390 of the hinge device 300. The rotation of the cam in the hinge device 300 acts as a lever, transmitting the force of the jack 230 to the cam groove of the hinge device 300, and then to the external scissor bracket 210. This lever generates a large torque, significantly increasing the force of the jack 230. Therefore, even with a relatively small size, the jack 230 can lift heavy objects (e.g., objects weighing 2 tons or more). As the piston rod 232 continues to extend, this lever effect will continue until the support structure 100 reaches the middle position.
[0040] The cam rotation angle and lifting height of the hinge device 300, where the cam engages with the two cam slots, occur within a cam rotation angle range of 50° to 60°. This rotation angle range is measured based on the process of the support structure 100 moving from a low position to an intermediate position. The engagement of the cam with the two cam slots occurs when the cam rotation angle is 55°. Combined with the shape of the pawl 330, the support structure 100 can be lifted 20 cm from its low position. After lifting 20 cm, the jack 230 will reach a position (more specifically, an tilt angle) where it can effectively transmit force, and further lifting can continue. The engagement refers to the sliding of the pawl 330 on the sliding track formed by the insert 390 of the cam slot; it can also be understood as the rotation process of the cam between the low and intermediate positions of the support structure 100. The sliding tracks on the insert 390 of the cam slot of the pawl 330 are in line contact.
[0041] When the support structure 100 is in the middle position, the limiting member 350 on each bearing block 360 contacts the stop block 340, thereby preventing the cam of the hinge device 300 from continuing to rotate. Therefore, when the cam stops rotating, the piston rod 232 continues to extend, driving the support structure 100 to move upward along the Z-axis. During the process of the support structure 100 moving from the middle position to the higher position, the cam will remain fixed by the contact between the limiting member 350 and the stop block 340, and will no longer rotate.
[0042] When the support structure 100 moves from the middle position to the high position, after it leaves the middle position, the cam of the hinge device 300 disengages from the cam groove. Thereafter, only the jack 230 drives the support structure 100 to move to the high position, eventually reaching the high position. In other words, during the process from the middle to the high position, the extension of the piston rod 232 drives the support structure 100 to move to the high position, while simultaneously causing the cam to gradually disengage from the cam groove. The lifting system state when the support structure 100 is in the high position: At this time, the piston rod 232 of the jack 230 extends to its maximum stroke, and the cam has completely disengaged from the cam groove. In summary, the force of this invention is borne by the tubular cross-section of the external scissor bracket, rather than the central plate or the ground, significantly improving system reliability and service life. Secondly, by adding a hinge device, the system becomes more compact, allowing the use of smaller jacks and accommodating lower ground clearance. Furthermore, the replaceable inserts and claw design make the system highly adaptable, meeting different lifting needs while maintaining ease of manufacturing.
[0043] The specific embodiments of this utility model have been described above, but this utility model is not limited thereto. Various changes can be made to this utility model as long as they do not depart from its spirit.
Claims
1. A lifting system including a hinge mechanism, characterized in that, include: The support structure (100), the operating device (200), and the hinge device (300) are provided, wherein the support structure (100) is connected to the upper part of the operating device (200), and the hinge device (300) is connected to the operating device (200). The hinge device (300) includes: a spacer (310), a rod (320), a claw (330), a stop (340), a limiting member (350), a bearing block (360), an ear piece (370), a base (380), an insert (390), a screw (3100), and a threaded rod (3200). The rod (320) is connected to both sides of the spacer (310) and is connected to the operating device (200). The claw (330) is engaged with the insert (390). The claw (330) is connected to the threaded rod (3200). 00) is connected to the rod (320), the stop block (340) is connected to the operating device (200), the limiting member (350) is connected to the rod (320), the stop block (340) is in contact with the limiting member (350), the bearing block (360) is connected to the limiting member (350), the bearing block (360) is connected to the spacer (310) by screws (3100), the ear piece (370) is connected to the limiting member (350), the ear piece (370) is connected to the operating device (200), and the base (380) is connected to the insert (390).
2. A lifting system including a hinge device according to claim 1, characterized in that: The support structure (100) includes: a platform (110), a bracket (120) and a pad (130). The platform (110) is connected to the upper part of the operating device (200), the bracket (120) is connected to the platform (110), and the pad (130) is connected to the upper part of the bracket (120).
3. A lifting system including a hinge device according to claim 1, characterized in that: The operating device (200) includes: an outer shear support (210), an inner shear support (220), and a jack (230). The outer shear support (210) and the inner shear support (220) are connected to the support structure (100). The inner shear support (220) is hinged to the outer shear support (210). The outer shear support (210) is connected to the hinge device (300). The inner shear support (220) is connected to the rod (320) and the stop block (340). The jack (230) is located between the outer shear support (210) and the inner shear support (220).
4. A lifting system including a hinge device according to claim 3, characterized in that: The jack (230) includes a cylinder (231) and a piston rod (232). The piston rod (232) is slidably connected to the inside of the cylinder (231). The cylinder (231) is connected to an outer shear bracket (210). The piston rod (232) is connected to an inner shear bracket (220). The piston rod (232) is connected to an ear piece (370).