Safety locking mechanism, shear type lifting device and automobile lifting machine

By designing a safety locking mechanism, the safety problem of scissor lift devices in the event of hydraulic failure was solved, realizing the parking needs of double-layer parking spaces and ensuring vehicle safety and space utilization.

CN224091554UActive Publication Date: 2026-04-07SHANDONG YUHE MECHANICAL & ELECTRICAL TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-20
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

Existing scissor lifts pose a safety hazard of vehicles falling from the upper level when the hydraulic system fails, especially in parking scenarios involving two-car families, and cannot effectively solve the problem of low vertical space utilization.

Method used

Design a safety locking mechanism, including a locking moving part and a locking fixing part. Through the cooperation of the locking hook and the locking block, it can ensure that the scissor lift device can still be effectively locked when the drive cylinder fails, so as to prevent the vehicle from falling.

Benefits of technology

In the event of a drive cylinder failure, the safety locking mechanism can effectively lock the scissor lift device to prevent the vehicle from falling, ensuring parking safety and space utilization, and meeting the parking needs of double-layer parking spaces.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a safety locking mechanism, a shear type lifting device and an automobile lifting machine, and belongs to the technical field of lifting locking. The safety locking mechanism comprises a locking moving part and a locking fixing part, the locking fixing part comprises a plurality of locking hooks, and the locking hooks are evenly distributed in a linear mode in the walking direction of the locking moving part. The locking moving part comprises a locking frame and a shifting block rotationally arranged on the locking frame, a rotatable connecting end is arranged at one end of the locking frame, a locking block is arranged at the other end of the locking frame, a locking space used for positioning the locking block is formed between every two adjacent locking hooks, and the shifting block is located between the connecting end and the locking block. The locking device is simple and compact in structure, forward movement of the locking moving part cannot be affected, when the locking moving part is in place and stopped, the locking hook can limit and lock the locking block, safe locking of lifting in place is guaranteed, and the situation that driving fails and lifting falls is avoided.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a safe locking mechanism, scissor type lifting device and automobile lift belong to lifting locking technical field. BACKGROUND

[0002] With the sustained development of national economy and the improvement of residents' living standards, the number of motor vehicles is increasing rapidly. While the car optimizes the travel efficiency, it also causes the "parking difficulty" problem in urban communities, especially in old residential areas of large and medium-sized cities. Due to the limitations of historical planning, the ground parking space of early construction communities is seriously short of configuration, and in recent years, the demand for purchasing the second car by family is growing rapidly, which further aggravates the contradiction between "more cars and less parking spaces".

[0003] The current mainstream relief measures focus on the expansion of underground parking lots, but this method faces double constraints: first, the development of underground space is limited by factors such as building structure and cost, and the number of new parking spaces cannot match the demand growth; second, traditional underground parking spaces only support flat parking, and each unit area can only accommodate a single vehicle, with low vertical space utilization. This contradiction is particularly prominent in the "one-family-two-car-single-parking-space" scenario. To address this pain point, a three-dimensional parking design based on scissor lifting technology can be introduced, which upgrades a single standard parking space to a double-layer parking unit through vertical space expansion, effectively solving the parking problem of two-car families.

[0004] However, the driving of the scissor lifting is usually driven by a driving cylinder, which may fail in actual implementation, such as hydraulic failure. Once hydraulic failure occurs, the upper vehicle will fall, and the upper vehicle may even be damaged. Therefore, a safe locking mechanism is needed to solve the safety problem of the scissor lifting in the lifting state. UTILITY MODEL CONTENTS

[0005] The utility model provides a safe locking mechanism, scissor type lifting device and automobile lift aiming at the deficiencies of the prior art.

[0006] The utility model solves the above technical problems by the following technical scheme: a safe locking mechanism, comprising a locking moving part and a locking fixed part, the locking fixed part comprises a plurality of locking hooks, the plurality of locking hooks are uniformly arranged in a straight line along the walking direction of the locking moving part; The locking moving part comprises a locking frame and a dial block rotatably arranged on the locking frame, one end of the locking frame is provided with a rotatable connecting end, the other end of the locking frame is provided with a locking block, a locking space for positioning the locking block is arranged between adjacent locking hooks, and the dial block is located between the connecting end and the locking block.

[0007] The beneficial effects of this utility model are: the locking hook does not affect the forward movement of the locking moving part; when locking, the locking moving part stops moving forward, and the locking block falls into a locking space; by limiting the locking block with the rear locking hook forming the locking space, it is ensured that the locking moving part will not move backward; the toggle block corresponds to the adjacent locking space and can fall into the adjacent locking space, avoiding affecting the locking hook's limiting and locking of the locking block; this utility model has a simple and compact structure, does not affect the forward movement of the locking moving part, and when the locking moving part stops in place, the locking hook can also limit and lock the locking block, ensuring its safe locking and preventing the locking moving part from moving backward.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the tilt angle of the front side of the locking block is consistent with the tilt angle of the rear locking surface of the locking hook, and the tilt angle of the rear side of the locking block is consistent with the tilt angle of the front locking surface of the locking hook.

[0010] The beneficial effect of adopting the above-mentioned further solution is that, when locked, the locking block falls into the space indicated between adjacent locking hooks. The matching of the inclination of the front and rear sides of the locking block with the front and rear locking surfaces of the locking hooks can further ensure the safe locking effect of the locking block and the locking hooks, and prevent the locking block from leaving the locking space when locked.

[0011] Furthermore, the rear locking surface of the locking hook and the front locking surface of the locking hook are locking inclined surfaces with the same inclination angle.

[0012] The beneficial effect of adopting the above-mentioned further solution is that when the safety locking mechanism moves forward, the rear locking surface of the locking hook can guide the front side of the locking block and will not hinder the forward movement of the locking block. In the locked state, the front locking surface of the locking hook limits the rear side of the locking block to prevent the locking frame from moving backward and affecting the safety locking effect of the safety locking mechanism.

[0013] Furthermore, the free end of the lever has a pointed structure.

[0014] The beneficial effects of adopting the above-mentioned further solution are that, when locked, the locking block can be confined within the locking space. Even if the drive cylinder fails, the locking mechanism can ensure the safety of scissor lifting. The free end of the pointed lever can be more easily inserted into the adjacent locking space without interfering with the locking space's confinement of the locking block. When unlocking, the locking hook acts on the lever, causing the free end of the locking frame to tilt upwards. The locking block of the locking frame disengages from the locking space and is not confined within it. The locking mechanism unlocks to achieve the purpose of scissor lifting and lowering.

[0015] Furthermore, the locking hook has a rhomboid cross-section.

[0016] The beneficial effects of adopting the above-mentioned further solution are that the diamond-shaped locking hook is easy to process, and the parallel front and rear locking surfaces constrain the locking block, making the locking more stable and reliable. When unlocking, the acute angle of the diamond structure can act on the lever, so that the locking frame rotates around the connecting end as the fulcrum, and the locking block will not fall into the locking space, thus avoiding affecting the descent action of the scissor lift assembly.

[0017] This utility model also relates to a scissor lift device, including a pair of X-shaped scissor assemblies and a drive cylinder for driving the lifting action of the scissor assemblies, and also includes the safety locking mechanism as described above; the bottom of the scissor assembly is provided with a hinge end and a roller end, and the safety locking mechanism is provided at one or both of the roller ends for safely locking the scissor assembly when it is lifted into position.

[0018] The beneficial effects of this utility model are as follows: the safety locking mechanism can be installed on the roller end side of one of the scissor lift components, or one safety locking mechanism can be installed on the roller end side of each pair of scissor lift components, depending on actual needs. During lifting, the hinge end of the scissor lift component remains stationary, while its roller end can roll towards the hinge end side, thereby raising the height of the scissor lift device. After the scissor lift device has reached its lifting position, the locking block of the safety locking mechanism falls into the locking space formed by the adjacent locking hooks. The locking hooks limit the locking block, locking the roller end of the scissor lift component. Even if the drive cylinder fails, the roller end of the scissor lift component will not move, and the height of the scissor lift device will not change, ensuring the safety and reliability of the scissor lift device.

[0019] Based on the above technical solution, the present invention can be further improved as follows.

[0020] Furthermore, the scissor lift assembly includes a first link and a second link hinged in the middle. The lower end of the first link is hinged to the base frame to form the hinge end, and the lower end of the second link is provided with a roller to form the roller end. The connecting end of the safety locking mechanism is rotatably connected to the wheel axle of the roller, and the locking hook of the safety locking mechanism is provided on the base frame.

[0021] The beneficial effect of adopting the above-mentioned further solution is that one end of the lower part of the scissor lift assembly is hinged to the base frame to form a hinge end, which can also be called the fixed end, and the other end is connected to the base frame through a roller to form a roller end, which can also be called the movable end. The locking moving part of the safety locking mechanism can move with the roller. After the lifting height is reached, the locking block of the safety locking mechanism can sink into the locking space, and the lever can be inserted into the adjacent locking space. Under the cooperation of the locking hook and the locking block, the roller end of the scissor lift assembly can be locked. In this way, even if the drive cylinder fails, the lower end of the second link will not move, thereby ensuring the safety of the lifting platform and preventing the lifting platform and the vehicle on it from falling.

[0022] Furthermore, the free end of the cylinder body of the drive cylinder is hinged, and the piston rod of the drive cylinder is hinged to the first connecting rod or the second connecting rod.

[0023] The advantage of adopting the above-mentioned further solution is that, since a vehicle needs to drive under the lifting platform, there should be no connecting rods between the scissor lift assemblies that would obstruct vehicle access. Therefore, the piston rod of the drive cylinder can be directly hinged to the connecting rod. Two drive cylinders can be provided, one on each side of the scissor lift assembly, thereby ensuring the lifting stability and reliability of the scissor lift device.

[0024] Furthermore, the base frame is provided with a track for the rollers to travel on.

[0025] The beneficial effect of adopting the above-mentioned further solution is that the track can guide and limit the travel direction of the roller end of the lower part of the scissor lift assembly, and the locking hooks of the safety locking mechanism are evenly arranged on the track, but do not affect the travel of the roller of the scissor lift assembly along the track, thereby meeting the lifting and safety requirements of the scissor lift device.

[0026] This utility model also relates to a car lift, including a lifting platform and a scissor lift device as described above. The lifting platform can move up and down under the action of the scissor lift device. The lifting platform can carry a vehicle. After the lifting platform is lifted into place, a lower parking space that can accommodate the vehicle can be formed below it.

[0027] The beneficial effects of this utility model are: when double-layer parking is required, the lifting platform can be raised under the action of the scissor lift device, thus achieving the purpose of parking two vehicles in one parking space and solving the parking difficulty problem. Specifically, vehicles can drive into the lifting platform, which is then raised under the action of the scissor lift device. After being raised to the correct position, vehicles on the lower level can drive under the lifting platform. Because the scissor lift device of this lift has a safety locking mechanism, after the lifting platform is raised to the correct position, the locking block falls into the locking space, and the locking hook limits the locking block to safely lock the scissor lift device. In this way, even if the drive cylinder of the scissor lift device fails, the lifting platform will not fall, ensuring the safety of the car lift.

[0028] Based on the above technical solution, the present invention can be further improved as follows.

[0029] Furthermore, the lifting platform is rotatably or slidably connected to the upper end of the first link of the scissor lift device, and the lifting platform is hinged to the upper end of the second link of the scissor lift device.

[0030] The beneficial effect of adopting the above-mentioned further solution is that it realizes the connection between the scissor lift device and the lifting platform. The scissor lift device has a simple and compact structure and can realize the vertical lifting of the lifting platform, thus meeting the parking requirements of vehicles on the lifting platform and vehicles below the lifting platform.

[0031] Furthermore, the entrance side of the lifting platform is also equipped with an inclined guide platform.

[0032] The advantage of adopting the above-mentioned further solution is that it facilitates vehicles to drive onto the lifting platform via the inclined guide.

[0033] Furthermore, the lifting platform is also equipped with positioning grooves for positioning the vehicle's wheels.

[0034] The beneficial effect of adopting the above-mentioned further solutions is to ensure improved positioning stability and accuracy of vehicles on the platform. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the safety locking mechanism of this utility model;

[0036] Figure 2 This is a schematic diagram of the structure of the locking and moving part of this utility model;

[0037] Figure 3 This is a three-dimensional structural diagram of the locking and moving part of this utility model;

[0038] Figure 4 This is a schematic diagram of the scissor lift device of this utility model;

[0039] Figure 5 This is a schematic diagram of the structure of the car lift of this utility model;

[0040] Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle;

[0041] Figure 7 This is a schematic diagram of the structure of the car lift in use according to this utility model;

[0042] Figure 8 This describes the working state of the safety locking mechanism of this utility model;

[0043] In the diagram, 1. Locking hook; 2. Locking frame; 3. Locking block; 4. Pulley; 5. Connecting end; 6. Drive cylinder; 7. First connecting rod; 8. Second connecting rod; 9. Roller; 10. Base frame; 11. Lifting platform; 12. Inclined guide; 13. Positioning slot; 14. Vehicle. Detailed Implementation

[0044] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0045] like Figures 1-3 As shown, a safety locking mechanism includes a locking moving part and a locking fixing part. The locking fixing part includes a plurality of locking hooks 1, which are evenly arranged in a straight line along the walking direction of the locking moving part. The locking moving part includes a locking frame 2 and a lever 4 rotatably mounted on the locking frame 2. One end of the locking frame 2 is provided with a rotatable connecting end 5, and the other end of the locking frame 2 is provided with a locking block 3. A locking space for positioning the locking block 3 is provided between adjacent locking hooks 1. The lever 4 is located between the connecting end 5 and the locking block 3.

[0046] The connecting end 5 can be a sleeve. The locking frame 2 is provided with a through hole for the lever 4 to pass through.

[0047] The tilt angle of the front side of the locking block 3 is consistent with the tilt angle of the rear locking surface of the locking hook 1, and the tilt angle of the rear side of the locking block 3 is consistent with the tilt angle of the front locking surface of the locking hook 1. When locked, the locking block 3 falls into the designated space between adjacent locking hooks 1. The matching of the planar tilt angles of the front and rear sides of the locking block 3 with the front and rear locking surfaces of the locking hook 1 further ensures the safe locking effect of the locking block 3 and the locking hook 1, preventing the locking block 3 from disengaging from the locking space when locked.

[0048] The rear locking surface of the locking hook 1 and the front locking surface of the locking hook 1 are locking inclined surfaces with the same inclination angle. When the safety locking mechanism moves forward, the rear locking surface of the locking hook 1 can guide the front side of the locking block 3 and will not hinder the forward movement of the locking block 3. In the locked state, the front locking surface of the locking hook 1 limits the rear side of the locking block 3 to prevent the locking frame 2 from moving backward and affecting the safety locking effect of the safety locking mechanism.

[0049] The free end of the lever 4 is a pointed structure. When locked, the locking block 3 can be confined within the locking space. Even if the drive cylinder 6 fails, the locking mechanism can ensure the safety of scissor lifting. The free end of the pointed lever 4 can be more easily inserted into the adjacent locking space without interfering with the locking space's confinement of the locking block 3. When unlocking, the locking hook 1 acts on the lever 4, causing the free end of the locking frame 2 to tilt upwards. The locking block 3 of the locking frame 2 disengages from the locking space and is no longer confined within it. The unlocking of the locking mechanism achieves the purpose of scissor lifting and lowering.

[0050] The locking hook 1 has a rhomboid cross-section. The rhomboid locking hook 1 is easy to manufacture. Its parallel front and rear locking surfaces constrain the locking block 3, making the locking more stable and reliable. When unlocking, the acute angle of the rhomboid structure can act on the lever 4, so that the locking frame 2 rotates around the connecting end 5 as the fulcrum. The locking block 3 will not fall into the locking space, thus avoiding affecting the descent action of the scissor lift assembly.

[0051] After the safety locking mechanism moves forward to its position, the locking block 3 can fall into the locking space. The locking hook 1 forming the locking space can limit and lock the locking block 3, preventing the locking moving part from moving backward. When locking, the lever 4 can fall into the adjacent locking space without interfering with the locking action of the locking hook 1 and the locking block 3, ensuring the safe locking action of the safety locking mechanism and solving the problem of safe locking. When unlocking, the locking moving part moves forward, the locking block 3 moves to the top of the locking hook 1, and the free end of the lever 4 moves to the locking space behind the locking hook 1 to unlock. The locking moving part moves backward, and the free end of the lever 4 swings towards the locking block 3. The locking hook 1 acts on the lever 4 or the locking block 3, causing the free end of the locking frame 2 to tilt upward. The locking block 3 will not fall into the locking space until the locking moving part moves backward to its position.

[0052] like Figure 4 As shown, this utility model also relates to a scissor lift device, including a pair of X-shaped scissor assemblies and a drive cylinder 6 for driving the lifting action of the scissor assemblies, and also includes the safety locking mechanism as described above; the bottom of the scissor assembly is provided with a hinge end and a roller end 9, and the safety locking mechanism is provided at one or both of the roller ends 9 for safely locking the scissor assembly when it is lifted into position.

[0053] The scissor lift assembly includes a first link 7 and a second link 8 hinged in the middle. The lower end of the first link 7 is hinged to the base frame 10 to form the hinge end. The lower end of the second link 8 is provided with a roller 9 to form the roller 9 end. The connecting end 5 of the safety locking mechanism is rotatably connected to the wheel axle of the roller 9. The locking hook 1 of the safety locking mechanism is provided on the base frame 10. One end of the lower part of the scissor lift assembly is hinged to the base frame 10 to form a hinge end, also known as the fixed end. The other end is connected to the base frame 10 via a roller 9 to form a roller 9 end, also known as the movable end. The locking moving part of the safety locking mechanism can move with the roller 9. After the lifting height is reached, the locking block 3 of the safety locking mechanism can sink into the locking space, and the lever 4 is inserted into the adjacent locking space. With the cooperation of the locking hook 1 and the locking block 3, the roller 9 end of the scissor lift assembly can be locked. In this way, even if the drive cylinder 6 fails, the lower end of the second link 8 will not move, thereby ensuring the safety of the lifting platform 11 and preventing the lifting platform 11 and the vehicle 14 on it from falling.

[0054] The free end of the cylinder body of the drive cylinder 6 is hinged, and the piston rod of the drive cylinder 6 is hinged to the first connecting rod 7 or the second connecting rod 8. Since a vehicle 14 needs to enter below the lifting platform 11, there should be no connecting rods between the scissor lift assemblies that would obstruct the entry of the vehicle 14. Therefore, the piston rod of the drive cylinder 6 can be directly hinged to the connecting rod. Two drive cylinders 6 can be provided, one on each side of the scissor lift assembly, thereby ensuring the lifting stability and reliability of the scissor lift device.

[0055] The base frame 10 is provided with a track for the rollers 9 to travel on. The track can guide and limit the travel direction of the rollers 9 at the bottom of the scissor lift assembly. The locking hooks 1 of the safety locking mechanism are evenly arranged on the track, but do not affect the travel of the rollers 9 of the scissor lift assembly along the track, thereby meeting the lifting and safety requirements of the scissor lift device.

[0056] like Figures 5-8 As shown, this utility model also relates to a car lift, including a lifting platform 11 and a scissor lift device as described above. The lifting platform 11 can move up and down under the action of the scissor lift device. The lifting platform 11 can carry a vehicle 14. After the lifting platform 11 is lifted into place, a lower parking space that can accommodate the vehicle 14 can be formed below it.

[0057] The lifting platform 11 is rolled or slidably connected to the upper end of the first connecting rod 7 of the scissor lift device, and the lifting platform 11 is hinged to the upper end of the second connecting rod 8 of the scissor lift device. This achieves the connection between the scissor lift device and the lifting platform 11. The scissor lift device has a simple and compact structure and can achieve vertical lifting of the lifting platform 11, meeting the parking requirements of vehicles 14 on and below the lifting platform 11.

[0058] The entrance side of the lifting platform 11 is also provided with an inclined guide platform 12. This facilitates the vehicle 14 to drive onto the lifting platform 11 via the inclined guide platform 12.

[0059] The lifting platform 11 is also provided with positioning grooves 13 for positioning the wheels of the vehicle 14. This ensures the positioning stability and accuracy of the vehicle 14 on the lifting platform 11.

[0060] This invention allows the lifting platform 11 to be raised when double-layer parking is required, using a scissor lift device. This enables two vehicles to park in one space, solving the parking difficulty problem. Specifically, vehicle 14 can drive into the lifting platform 11, and the safety locking mechanism is in its initial position. Figure 8 As shown in Figure a, the lifting platform 11 is then raised under the action of the scissor lift device. With the action of the drive cylinder 6 of the scissor lift device, the lower end of the second connecting rod 8 moves along the track on the base frame 10 towards the hinge end. The connecting end 5 of the locking moving part is fitted onto the axle of the roller 9 of the second connecting rod 8. The locking block 3 advances under the action of the forward-tilting rear locking surface of the locking hook 1, as shown in Figure a. Figure 8 As shown in b, the lifting platform 11 is in the safety locking mechanism state during the lifting process. The lifting platform 11 is lifted into place, as shown in the figure. Figure 8 As shown in c, the locking block 3 falls into the corresponding locking space. The front locking surface or the front and rear locking surfaces of the locking hook 1 can limit and lock the locking block 3. The safety locking mechanism locks the position of the roller 9 end, and the roller 9 end of the scissor assembly cannot move backward. At this time, even if the drive cylinder 6 fails, the scissor assembly will not fall. The safety locking can solve the problem of the lifting platform 11 falling when the drive fails. When unlocking, the drive cylinder 6 moves, first causing the roller 9 end of the scissor assembly to move forward, as shown in c. Figure 8 As shown in d, the locking moving part moves forward, causing it to reach the unlocked position. That is, the locking block 3, after moving forward, moves to the top of the locking hook 1, and the toggle block 4 moves into the locking space behind it. Figure 8 As shown in e, the mechanism is unlocked, drive cylinder 6 retracts, roller 9 of the scissor lift assembly moves backward within the track, and lifting platform 11 descends. Figure 8As shown in f and g, the locking moving part moves backward, the free end of the lever 4 swings towards the locking block 3, the locking hook 1 acts on the lever 4 or the locking block 3, the free end of the locking frame 2 tilts upward, the locking block 3 will not fall into the locking space, and the locking moving part moves backward smoothly until it reaches the desired position. Figure 8 As shown by h, the lifting platform 11 descends into position, after which the vehicle 14 on the lifting platform 11 can drive off. Even if the drive cylinder 6 of the scissor lift device of the car lift fails, the lifting platform 11, equipped with this safety locking mechanism, will not fall, ensuring the safety of the car lift.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 safety locking mechanism, characterized in that, The device includes a locking moving part and a locking fixing part. The locking fixing part includes multiple locking hooks (1), which are evenly arranged in a straight line along the walking direction of the locking moving part. The locking moving part includes a locking frame (2) and a lever (4) rotatably mounted on the locking frame (2). One end of the locking frame (2) is provided with a rotatable connecting end (5), and the other end of the locking frame (2) is provided with a locking block (3). A locking space for positioning the locking block (3) is provided between adjacent locking hooks (1). The lever (4) is located between the connecting end (5) and the locking block (3).

2. The safety locking mechanism according to claim 1, characterized in that, The tilt angle of the front side of the locking block (3) is consistent with the tilt angle of the rear locking surface of the locking hook (1), and the tilt angle of the rear side of the locking block (3) is consistent with the tilt angle of the front locking surface of the locking hook (1).

3. The safety locking mechanism according to claim 2, characterized in that, The rear locking surface of the locking hook (1) and the front locking surface of the locking hook (1) are locking inclined surfaces with the same inclination angle.

4. The safety locking mechanism according to any one of claims 1-3, characterized in that, The free end of the lever (4) is a pointed structure; and / or the cross-section of the locking hook (1) is a rhomboid structure.

5. A scissor lift device, characterized in that, It includes a pair of X-shaped scissor lift assemblies and a drive cylinder (6) for driving the lifting and lowering action of the scissor lift assemblies, and also includes a safety locking mechanism as described in any one of claims 1-4; the bottom of the scissor lift assembly is provided with a hinge end and a roller (9) end, and the safety locking mechanism is provided at one or both of the roller (9) ends for safely locking the scissor lift assembly in place.

6. The scissor lift device according to claim 5, characterized in that, The scissor lift assembly includes a first link (7) and a second link (8) hinged in the middle. The lower end of the first link (7) is hinged to the base frame (10) to form the hinge end. The lower end of the second link (8) is provided with a roller (9) to form the roller (9) end. The connecting end (5) of the safety locking mechanism is rotatably connected to the wheel axle of the roller (9). The locking hook (1) of the safety locking mechanism is provided on the base frame (10).

7. The scissor lift device according to claim 6, characterized in that, The free end of the cylinder body of the drive cylinder (6) is hinged, and the piston rod of the drive cylinder (6) is hinged to the first connecting rod (7) or the second connecting rod (8); and / or the base frame (10) is provided with a track for the roller (9) to travel on.

8. A car lift, characterized in that, The device includes a lifting platform (11) and a scissor lift device as described in any one of claims 5-7. The lifting platform (11) is capable of lifting and lowering under the action of the scissor lift device. The lifting platform (11) is capable of carrying a vehicle (14). After the lifting platform (11) is lifted into place, a lower parking space for accommodating the vehicle (14) can be formed below it.

9. The car lift according to claim 8, characterized in that, The lifting platform (11) is rolled or slidably connected to the upper end of the first connecting rod (7) of the scissor lift device, and the lifting platform (11) is hinged to the upper end of the second connecting rod (8) of the scissor lift device.

10. The car lift according to claim 8, characterized in that, The lifting platform (11) is also provided with an inclined guide (12) on the entrance side; and / or the lifting platform (11) is also provided with a positioning groove (13) for positioning the wheels.