Elevator with locking mechanism

Abstract

The utility model relates to a lifter with a locking mechanism, which comprises a lifter moving base, a lifting structure is mounted at the upper end of the lifter moving base, a lifting platform is mounted at the upper end of the lifting structure, the lifting structure is formed by connecting an outer lifting rod and an inner lifting rod in a crossed manner, and a connecting shaft penetrates through the joint of the outer lifting rod and the inner lifting rod. A locking structure is installed on the surface of the connecting shaft, the surface of the locking structure is connected with the end of the inner lifting rod, the locking structure comprises a locking pipe installed on the surface of the connecting shaft, inner teeth are symmetrically installed in the locking pipe, a bearing is installed in the middle of the interior of the locking pipe, the connecting shaft is connected with an inner ring of the bearing, and a circular groove is formed in the surface of the connecting shaft. Mounting columns are symmetrically mounted on the surface of the circular groove, locking bent plates are movably mounted on the surfaces of the mounting columns, and outer teeth are arranged on the outer side faces of the locking bent plates. The elevator locking structure solves the problem that an existing elevator locking structure cannot adapt to the situation that a hydraulic cylinder suddenly loses efficacy, and consequently a lifting platform falls off.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to an elevator with a locking mechanism. Background Art

[0002] Elevators are commonly used in construction, civil engineering, equipment maintenance, etc. They have a wide range of uses and can be seen in various factories. Existing elevators generally use hydraulic cylinders to drive lifting rods to raise the height of the lifting platform, thereby meeting the construction height and facilitating construction. However, due to long-term use, the hydraulic cylinder may be damaged, causing the lifting platform to fall suddenly, which greatly affects the life safety of the workers.

[0003] In order to solve this problem, a locking structure is provided for the lifter, which can lock the lifting rod in time at a critical moment to prevent sudden falling in the absence of a hydraulic cylinder. Chinese patent CN220999158U, a scissor-type lifting platform with a locking structure points out that when the first electric push rod is started, the push block is pushed inward, driving the sliding column to slide inside the limit slide frame. As the sliding column moves inward, the upper and lower angles between the lifting and lowering support rods become smaller, thereby raising the lifter. At the same time, as the angle of the lifting and lowering support rods becomes smaller, the distance between the upper lifting and lowering support rods is shortened, so that the stabilizing plate is in the slide groove. The internal sliding of the stabilizer plate will be stuck into the inside of the slide, thereby increasing the pressure resistance of both sides of the lifting platform and extending the service life of the device. Although the above patent can improve its safety factor through the above method through a similar locking structure, it still has certain shortcomings. The patent is to lock the stabilizer plate into the inside of the slide to produce a locked state, but this method is locked when the lifting rod rises to a height, but it is more troublesome to restore the lifting state, and in this method, when the electric push rod drives the lifting support rod to rise, the electric push rod suddenly fails before reaching the height, and the above method cannot solve this situation.

[0004] Therefore, in order to cope with the problem of sudden drive failure and prevent the lifting platform from falling in an emergency, a lift with a locking mechanism is proposed. Utility Model Content

[0005] In view of the deficiencies of the existing technology, the present invention provides a lift with a locking mechanism, which solves the problem that the existing lift locking structure cannot adapt to the sudden failure of the hydraulic cylinder causing the lifting platform to fall.

[0006] The cam is secured to the upper end of the lifting link, and the cam is secured to the lower end of the lifting link, and the cam is secured to the lower end of the lifting link, and the cam is secured to the lower end of the lifting link.

[0007] Through the above technical solution, further, the connecting shaft is a hollow tube, and an opening is provided on the surface of the connecting shaft corresponding to the locking bend plate. A steel wire rope is fixedly installed on the lower side of the locking bend plate. The steel wire rope extends outward along the hollow tube to the outside, and a pull column is provided at the connection of the outer end of the steel wire rope.

[0008] Furthermore, a small telescopic spring is fixedly installed on the surface of the connecting shaft corresponding to the locking bent plate. The locking bent plate is bent from top to bottom and flattened at the lower bent portion. The outer end of the small telescopic spring contacts the inner plane of the locking bent plate.

[0009] As a preferred technical solution, the lifting structure also includes a driving structure, which includes a connecting plate installed on the surface of the connecting shaft, a hydraulic cylinder movably installed at the upper end of the connecting plate, and a telescopic end of the hydraulic cylinder movably connected to the surface of the connecting shaft on the opposite side.

[0010] Furthermore, a support rod is installed on the surface of the connecting shaft, and the upper end of the support rod is an arc surface and faces the hydraulic cylinder.

[0011] As a preferred technical solution, a fence is provided on the lifting platform, and a ladder is installed on the rightmost end face of the lifting platform's movable base.

[0012] Compared with the prior art, the present invention provides a lift with a locking mechanism, which has the following beneficial effects:

[0013] 1. In this device, when the lifting platform is driven by the hydraulic cylinder to raise the lifting rod, if the hydraulic cylinder suddenly fails and is damaged, the lifting platform and the lifting rod will suddenly fall downward rapidly. During this process, due to the action of gravity inertia, its locking bent plate expands to both sides, so that its outer teeth engage with the inner teeth, thereby achieving a stuck state, locking the lifting rod to prevent it from continuing to fall. When it falls suddenly, its locking bent plate expands outward due to the action of inertia force, thereby completing the locking state. When the hydraulic cylinder falls slowly, the locking bent plate will not expand outward due to the action of inertia force, thereby effectively preventing the sudden fall caused by the sudden failure of the hydraulic cylinder when the hydraulic cylinder drives the lifting rod to rise, thereby solving the problem that the existing elevator locking structure cannot adapt to the lifting platform falling caused by the sudden failure of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a lift with a locking mechanism according to the present utility model;

[0015] Figure 2 This is a schematic diagram of the cross-connected structure of the inner lifting rod and the outer lifting rod of a lift with a locking mechanism in the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of a lift connecting shaft with a locking mechanism according to the utility model;

[0017] Figure 4 This utility model is a lift with a locking mechanism Figure 1 A local enlarged structural diagram of point A;

[0018] Figure 5 This is a schematic diagram of the structure of a locking tube of an elevator with a locking mechanism according to the utility model;

[0019] Figure 6 This is a schematic diagram of the surface structure of the connecting shaft of a lifter with a locking mechanism located in a locking tube of the utility model;

[0020] Figure 7 This is a schematic diagram of the structure of a locking bent plate of an elevator with a locking mechanism subjected to inertial force;

[0021] Figure 8 The utility model is a schematic diagram of a lift hook structure with a locking mechanism.

[0022] In the figure: 1. Lifting machine moving base; 2. External lifting rod; 3. Internal lifting rod; 4. Lifting platform; 5. Connecting plate; 6. Hydraulic cylinder; 7. Support rod; 8. Connecting shaft; 9. Locking tube; 10. Internal teeth; 11. Bearing; 12. Circular groove; 13. Mounting column; 14. Small telescopic spring; 15. Locking bent plate; 16. External teeth; 17. Steel wire rope; 18. Pull column; 19. Barb. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0024] See also Figure 1-8 The utility model provides the following technical solutions: a lift with a locking mechanism, including a lift mobile base 1, a lifting structure installed on the upper end of the lift mobile base 1, a lifting platform 4 installed on the upper end of the lifting structure, the lifting structure is composed of an outer lifting rod 2 and an inner lifting rod 3 cross-connected, the connection between the outer lifting rod 2 and the inner lifting rod 3 is penetrated by a connecting shaft 8, a locking structure is installed on the surface of the connecting shaft 8, the surface of the locking structure is connected to the end of the inner lifting rod 3, the locking structure includes a locking tube 9 installed on the surface of the connecting shaft 8, and the locking Internal teeth 10 are symmetrically installed in the tube 9, and a bearing 11 is installed in the middle of the locking tube 9. Its connecting shaft 8 is connected to the inner ring of the bearing 11. A circular groove 12 is provided on the surface of the connecting shaft 8, and mounting columns 13 are symmetrically installed on the surface of the circular groove 12. A locking bent plate 15 is movably installed on the surface of the mounting column 13. External teeth 16 are provided on the outer side of the locking bent plate 15, and grooves are provided on the teeth on the internal teeth 10 corresponding to the external teeth 16. Barbs 19 are provided on the surface of the external teeth 16, and the tooth width of the external teeth 16 is smaller than the tooth width of the internal teeth 10.

[0025] In this embodiment, the specific working principle is as follows: when the elevator is in use, the lifting platform 4 is first driven to rise upward by the lifting structure. If the lifting structure fails suddenly during the lifting process, the locking bent plate 15 in the locking tube 9 will expand outward due to the sudden drop. At this time, the outer teeth 16 will mesh with the inner teeth 10, thereby preventing the lifting structure from continuing to fall. It should be noted that the lifting platform 4 itself has a certain gravity, and when the lifting mechanism fails, it will fall rapidly. In addition to the gravity factor itself, its falling speed is faster, so the inertial force generated by gravity will also increase. Figure 7As shown, when the connecting shaft 8 suddenly falls, the locking bent plate 15 will also move quickly to the outside, so that the connecting shaft 8 can be firmly stuck in the locking tube 9. Since the surface of the locking tube 9 is fixedly connected to the lifting rod, the inner and outer lifting rods will no longer fall. This solves the problem that the existing elevator locking structure cannot adapt to the sudden failure of the hydraulic cylinder causing the lifting platform to fall.

[0026] When the lock state occurs, how to release the lock state, please refer to Figure 1 and Figure 4 It can be seen that the connecting shaft 8 is a hollow tube, and an opening is provided on the surface of the connecting shaft 8 corresponding to the locking bent plate 15. A steel wire rope 17 is fixedly installed on the lower side of the locking bent plate 15. The steel wire rope 17 extends outward along the hollow tube to the outside, and a pull column 18 is provided at the connection of the outer end of the steel wire rope 17. First, when the locking state appears, the hydraulic cylinder 6 is slightly extended upward, and then the state of the hydraulic cylinder 6 is maintained, and then the pull column 18 is pulled to make the locking bent plate 15 contract toward the surface of the connecting shaft 8 through the action of the steel wire rope 17, so that the outer teeth 16 and the inner teeth 10 are disengaged, thereby completing the contact of the locked state. It should be noted that, refer to Figure 8 It can be seen that a certain space is left between the inner teeth 10 and the outer teeth 16, which can leave space for the hydraulic cylinder 6 to expand, thereby facilitating the release of the locked state.

[0027] According to the above, in order to facilitate the operation of the locked state and to know whether the locked state is released, please refer to Figure 7 It can be seen that a small telescopic spring 14 is fixedly installed on the surface of the connecting shaft 8 corresponding to the locking bent plate 15. The locking bent plate 15 is bent from top to bottom and flattened at the lower bent portion. The outer end portion of the small telescopic spring 14 contacts the inner plane of the locking bent plate 15. The locking bent plate 15 itself is in a bent state, so the upper end portion is flattened, which can facilitate the installation of the outer teeth 16. The plane is not horizontal, but also an inclined plane. Then, when the locking state is contacted, the lower end surface of the locking bent plate 15 will contact the small telescopic spring 14. When the user pulls the steel wire rope 17 and feels that the locking bent plate 15 has a certain elasticity, the surface locking state is released.

[0028] According to the above, the lifting structure can be specifically referred to Figure 1 and Figure 2 It can be seen that the lifting structure also includes a driving structure, which includes a connecting plate 5 installed on the surface of the connecting shaft 8, and a hydraulic cylinder 6 is movably installed at the upper end of the connecting plate 5. The telescopic end of the hydraulic cylinder 6 is movably connected to the surface of the connecting shaft 8 on the opposite side.

[0029] In order to provide support force for the hydraulic cylinder 6, please refer to Figure 2It can be seen that a support rod 7 is also installed on the surface of the connecting shaft 8 , and the upper end of the support rod 7 is an arc surface and faces the hydraulic cylinder 6 .

[0030] In order to facilitate the staff to board the lifting platform 4, please refer to Figure 1 It can be seen that a fence is provided on the lifting platform 4, and a ladder is installed on the rightmost end face of the lifting movable base 1.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A lift with a locking mechanism, comprising a lift movable base (1), a lifting structure mounted on the upper end of the lift movable base (1), a lifting platform (4) mounted on the upper end of the lifting structure, characterized in that: The lifting structure is composed of an outer lifting rod (2) and an inner lifting rod (3) which are cross-connected. A connecting shaft (8) is passed through the connection between the outer lifting rod (2) and the inner lifting rod (3). A locking structure is installed on the surface of the connecting shaft (8). The surface of the locking structure is connected to the end of the inner lifting rod (3). The locking structure includes a locking tube (9) installed on the surface of the connecting shaft (8), and an inner tooth (10) is symmetrically installed in the locking tube (9). A bearing (11) is installed in the middle of the locking tube (9). The connecting shaft (8) and the shaft The inner ring of the bearing (11) is connected, a circular groove (12) is provided on the surface of the connecting shaft (8), and a mounting column (13) is symmetrically installed on the surface of the circular groove (12), a locking bent plate (15) is movably installed on the surface of the mounting column (13), and an outer side surface of the locking bent plate (15) is provided with an outer tooth (16), and a groove is provided on the tooth on the inner tooth (10) corresponding to the outer tooth (16), and a barb (19) is provided on the surface of the outer tooth (16), and the tooth width of the outer tooth (16) is smaller than the tooth width of the inner tooth (10).

2. The elevator with a locking mechanism according to claim 1, characterized in that: The connecting shaft (8) is a hollow tube, and an opening is provided on the surface of the connecting shaft (8) at a position corresponding to the locking bent plate (15). A steel wire rope (17) is fixedly installed on the lower side of the locking bent plate (15). The steel wire rope (17) extends outward along the hollow tube to the outside, and a pull column (18) is provided at the connection point of the outer end of the steel wire rope (17).

3. The elevator with a locking mechanism according to claim 1, characterized in that: A small telescopic spring (14) is fixedly mounted on the surface of the connecting shaft (8) corresponding to the locking bent plate (15). The locking bent plate (15) is bent from top to bottom and flattened at the lower bent portion. The outer end of the small telescopic spring (14) contacts the inner plane of the locking bent plate (15).

4. The elevator with a locking mechanism according to claim 1, characterized in that: The lifting structure further includes a driving structure, which includes a connecting plate (5) mounted on the surface of the connecting shaft (8), a hydraulic cylinder (6) being movably mounted at the upper end of the connecting plate (5), and a telescopic end of the hydraulic cylinder (6) being movably connected to the surface of the connecting shaft (8) on the opposite side.

5. The elevator with a locking mechanism according to claim 1, characterized in that: A support rod (7) is also installed on the surface of the connecting shaft (8), and the upper end of the support rod (7) is an arc surface and faces the hydraulic cylinder (6).

6. The elevator with a locking mechanism according to claim 1, characterized in that: The lifting platform (4) is provided with a fence, and a ladder is installed on the rightmost end face of the lifting platform movable base (1).

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