A levelling device

Abstract

This utility model belongs to the technical field of lifting operation platforms, and particularly relates to a leveling device, including a mounting base and hooks. The mounting base is disposed on the inner wall of the hoistway, and at least two are symmetrically arranged about the car. The hooks are disposed on the car and correspond to the mounting bases. A slot with an upward opening is provided on the side of the mounting base near the hooks. An upwardly inclined support plane is formed on the inner wall of the slot facing the hooks. A first vertical plane is provided on the side of the slot opposite to the support plane, extending upward to the upper end of the mounting base. A hook portion corresponding to the slot is provided at the lower end of the hook. An upwardly inclined bearing plane corresponding to the support plane is provided on the hook portion. A second vertical plane is provided on the side of the hook portion near the mounting base, and the lower end of the bearing plane is connected to the lower end of the second vertical plane. This utility model prevents the car from sinking through the cooperation of the hooks and the slots, and the support plane and the bearing plane form surface contact, effectively improving the stability and load-bearing capacity during leveling.

Description

Technical Field

[0001] This utility model belongs to the technical field of lifting operation platforms, and in particular relates to a leveling device. Background Technology

[0002] Lifting work platforms are widely used in cargo lifting and handling. Existing lifting equipment mainly consists of a vertically set derrick and a car that moves up and down on the derrick. The lifting of the car is mainly achieved through a traction mechanism, such as the cooperation of chains and hydraulic cylinders. To prevent the car from sinking when it is stationary, a leveling device or anti-sinking device is installed on the lifting work platform to ensure the safety of the car. Although the existing leveling device can limit the car when it is stationary and prevent it from sinking, the car is still prone to tilting when the cargo is heavy, which affects its use and poses a safety hazard. Utility Model Content

[0003] The purpose of this invention is to provide a leveling device that can solve the above-mentioned problems.

[0004] To achieve the above objectives, this utility model provides a leveling device, including a card seat and hooks. The card seats are disposed on the inner wall of the shaft, and at least two are symmetrically arranged about the car. The hooks are disposed on the car and correspond to the card seats. The card holder has an upward-opening slot on the side near the hook. An upward-sloping support plane is formed on the inner wall of the slot facing the hook. A first vertical plane is provided on the side of the slot opposite to the support plane. The first vertical plane extends upward to the upper end of the card holder. The lower end of the hook is provided with a hook part corresponding to the slot. The hook part is provided with a bearing plane that is inclined upward and corresponds to the support plane. A second vertical plane is provided on the side of the hook part near the card seat. The lower end of the bearing plane is connected to the lower end of the second vertical plane. The hook can swing toward the card holder so that the hook portion is accommodated in the card slot, and the bearing plane abuts against the supporting plane; When the hook is accommodated in the slot, a gap is formed between the second vertical plane and the first vertical plane.

[0005] Optionally, the card holder has a branch wall facing the side near the hook, and the card slot is formed at the upper end of the branch wall.

[0006] Optionally, the side of the branch wall facing the hook is provided with an inclined surface that slopes downward in a direction away from the hook; When the car moves the hook from below the card seat upwards, the inclined surface can press against the second vertical plane, causing the hook to swing away from the card seat.

[0007] Optionally, the upper end of the second vertical plane is provided with a first arc-shaped chamfer, and when the car drives the hook to move upward from below the card seat, the first arc-shaped chamfer can abut against the inclined surface.

[0008] Optionally, it also includes a mounting base that is mounted on the car; The hook also includes a rod, the hook portion is disposed at the upper end of the rod, and the lower end of the rod is rotatably connected to the mounting base.

[0009] Optionally, one side of the mounting base is provided with an arc-shaped hole along the swing path of the hook, and one side of the rod is provided with a limiting member passing through the arc-shaped hole.

[0010] Optionally, it also includes an elastic element for driving the limiting element to swing the rod toward the card seat.

[0011] Optionally, the elastic element is a tension spring, and the two ends of the tension spring are respectively connected to the limiting element and the mounting base.

[0012] Optionally, it also includes a shielding arm, which is inclined downward, with its upper end rotatably connected to the card seat and its lower end abutting against the upper end of the branch wall to shield the card slot. The lower end of the shielding arm extends toward the hook and is exposed relative to the side of the branch wall closer to the hook. When the car moves the hook downward from above the card seat, the blocking arm can squeeze the hook to make the hook swing away from the card seat; When the car moves the hook upward from below the card slot, the hook can push the exposed end of the blocking arm to make the blocking arm swing upward to open the card slot.

[0013] Optionally, the lower end of the shielding arm is provided with an upwardly inclined guide surface, the lower end of which is lower than the upper end of the branch wall; A second arc-shaped chamfer is provided at the connection between the bearing plane and the second vertical plane, and the second arc-shaped chamfer can abut against the upper end of the shielding arm and the guide surface.

[0014] Compared with existing technologies, the advantages of this utility model are: by using hooks and slots to prevent the car from sinking, and by forming surface contact between the supporting plane and the bearing plane, the stability and load-bearing capacity during leveling are effectively improved. The supporting planes on the two opposing slots cooperate with the bearing planes on the corresponding hooks to limit movement, ensuring that the car is in a centered position and preventing lateral displacement of the car due to guide rail deviation, which could lead to swaying or tilting when the car is parked, thus ensuring high safety.

[0015] The gap design can prevent friction between the hook and the seat, which can cause noise or damage, thus improving the service life of the hook. In addition, the gap allows for a certain amount of fine-tuning space for the hook, avoiding assembly stress caused by processing errors or installation deviations.

[0016] The leveling device has a simple overall structure and is easy to install and debug on the hoistway and car respectively, which can effectively reduce production and maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a side view of the hook of this utility model hanging on the card slot.

[0019] Figure 2 This is a side view of the hook of this utility model when it is located below the card holder.

[0020] Figure 3 This is a schematic diagram of the structure of the concealed mounting base of this utility model.

[0021] In the picture: 100, Card holder; 110, Branch wall; 111, Inclined surface; 120, Card slot; 121, Support plane; 122, First vertical plane; 130, Fixing seat; 200. Hook; 210. Hook portion; 211. Bearing plane; 212. Second vertical plane; 213. First arc-shaped chamfer; 214. Second arc-shaped chamfer; 220. Rod portion; 221. Limiting component; 222. Fixed shaft; 300. Mounting base; 310. Arc-shaped hole; 400. Elastic components; 500, shielding arm; 510, guide surface. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the embodiments of this utility model, it should be understood that if the embodiments of this utility model involve directional indications, such as up, down, left, right, front, back, inside, outside, etc., the orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this embodiment of the invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. They can be mechanical or electrical connections. They can be direct connections or indirect connections through an intermediate medium, and can represent the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0026] like Figures 1 to 3 As shown, this utility model embodiment provides a leveling device, including a card holder 100, a hook 200, a mounting base 300, an elastic element 400, and a blocking arm 500.

[0027] The card holders 100 are disposed on the inner wall of the hoistway, and at least two are symmetrically arranged about the car. In this embodiment, four are preferred. The four card holders 100 are arranged in a rectangular symmetrical manner on the four inner walls of the hoistway, close to the elevator doors. Specifically, the card holders 100 are welded to the fixing seats 130, and the fixing seats 130 are fixed to the hoistway with bolts. Furthermore, hooks 200 are disposed on the car and correspond to the card holders 100. Specifically, the thickness of the card holders 100 is preferably 20mm, and the thickness of the hooks 200 is preferably 30mm to improve structural strength.

[0028] Furthermore, the card holder 100 has an upward-opening slot 120 on the side near the hook 200. An upwardly inclined support plane 121 is formed on the inner wall of the slot 120 facing the hook 200. The angle between the support plane 121 and the horizontal plane is preferably 36.45°, but can also be designed as 30°, 45°, 60°, etc., depending on design requirements. Furthermore, the lower end of the hook 200 has a hook portion 210 corresponding to the slot 120. The hook portion 210 has an upwardly inclined bearing plane 211 corresponding to the support plane 121. The hook 200 can swing towards the card holder 100 so that the hook portion 210 is accommodated within the slot 120. The hook 200 and the slot 120 cooperate to prevent the car from sinking. The bearing plane 211 abuts against the support plane 121, forming a surface contact, effectively improving stability and load-bearing capacity during leveling. The support plane 121 on the two opposing card holders 100 and the bearing plane 211 on the corresponding hook 210 can play a limiting role, so that the car can be in the center position, preventing the car from lateral displacement due to guide rail deviation, which would cause the car to shake or tilt when parked.

[0029] Furthermore, a first vertical plane 122 is provided on the side of the slot 120 opposite to the support plane 121. The first vertical plane 122 extends upward to the upper end of the card holder 100. A second vertical plane 212 is provided on the side of the hook 210 near the card holder 100. The lower end of the bearing plane 211 is connected to the lower end of the second vertical plane 212. When the hook 210 is accommodated in the slot 120, a gap is formed between the second vertical plane 212 and the first vertical plane 122. The gap design can avoid friction between the hook 210 and the card holder 100, which could cause noise or damage, thus improving the service life of the hook 200. Moreover, the gap allows the hook 200 to have a certain fine-tuning space, avoiding assembly stress caused by processing errors, installation deviations, etc.

[0030] The leveling device has a simple overall structure and is easy to install and debug on the hoistway and car respectively, which can effectively reduce production and maintenance costs.

[0031] In one embodiment, such as Figure 1 As shown, the card holder 100 has a branch wall 110 on the side facing the hook 200, and a card slot 120 is formed on the upper end of the branch wall 110. The branch wall 110 is integrally formed with the card holder 100 to ensure the stability of the structure, reduce assembly steps, facilitate production, and save costs.

[0032] In one embodiment, such as Figure 2As shown, the side of the branch wall 110 facing the hook 200 has a downwardly inclined surface 111 that slopes away from the hook 200. When the car moves the hook 200 upward from below the seat 100, the inclined surface 111 can press against the second vertical plane 212, causing the hook 210 to swing away from the seat 100. The inclined surface 111 ensures that the hook 210 can slide smoothly along the inclined surface 111 until it reaches the slot 120 entrance at the upper end of the branch wall 110, effectively preventing the hook 200 from rigidly colliding or impacting the seat 100. Furthermore, the upper end of the second vertical plane 212 has a first arc-shaped chamfer 213. When the car moves the hook 200 upward from below the seat 100, the first arc-shaped chamfer 213 can abut against the inclined surface 111. The first arc-shaped chamfer 213 reduces the frictional resistance and wear between the hook 200 and the inclined surface 111 during the guiding process. The curved contact makes the movement of the hook 200 smoother, helps reduce operating noise, and further improves the service life of the leveling device.

[0033] like Figure 3 As shown, in one embodiment, the mounting base 300 is mounted on the car. Furthermore, the hook 200 also includes a rod 220, wherein the rod 220 and the hook 210 are integrally formed. The hook 210 is located at the upper end of the rod 220, and the lower end of the rod 220 is rotatably connected to the mounting base 300, thereby enabling the hook 200 to swing. Specifically, a fixed shaft 222 is fixed on the mounting base 300, and the lower end of the rod 220 is rotatably connected to the fixed shaft 222.

[0034] Furthermore, such as Figure 1 and Figure 2 As shown, one side of the mounting base 300 is provided with an arc-shaped hole 310 along the swing path of the hook 200, and one side of the rod 220 is provided with a limiting member 221 passing through the arc-shaped hole 310. The limiting member 221 cooperates with the arc-shaped hole 310 to limit the swing angle of the hook 200 and ensure the stability of the hook 200. Specifically, the limiting member 221 is a screw or bolt, preferably a screw. The screw passes through the arc-shaped hole 310 and is threaded to the rod 220, which is convenient for installation and facilitates subsequent disassembly, maintenance and replacement.

[0035] In one embodiment, such as Figure 1 and Figure 2 As shown, the elastic element 400 is used to drive the limiting element 221 to swing the rod 220 toward the card seat 100. The elastic element 400 can be an elastic rope, a tension spring, etc., preferably a tension spring. Specifically, the two ends of the tension spring are connected to the limiting element 221 and the mounting base 300 respectively. The tension spring is inclined downward, with the upper end hanging on the limiting element 221 and the lower end hanging on the screw set on the mounting base 300.

[0036] In one embodiment, such as Figure 3 As shown, the blocking arm 500 is inclined downwards, with its upper end rotatably connected to the card holder 100 and its lower end abutting against the upper end of the branch wall 110 to block the card slot 120. The lower end of the blocking arm 500 extends towards the hook 200 and is exposed relative to the side of the branch wall 110 closest to the hook 200. When the car moves the hook 200 downwards from above the card holder 100, the blocking arm 500 can squeeze the hook part 210, causing the hook part 210 to swing away from the card holder 100. The branch wall 110 acts as a support, restricting the blocking arm 500 so that the blocking arm 500 blocks the card slot 120, preventing the hook 200 from getting caught in the card slot 120 when the car is descending, thus ensuring the normal downward operation of the car. Furthermore, when the car moves the hook 200 from below the seat 100 upwards, the hook 210 can push the exposed end of the blocking arm 500 so that the blocking arm 500 swings upwards to open the slot 120 so that the hook 200 can be hooked onto the slot 120.

[0037] In one embodiment, such as Figure 3 As shown, the lower end of the shielding arm 500 is provided with an upwardly inclined guide surface 510. The lower end of the guide surface 510 is lower than the upper end of the branch wall 110. A second arc-shaped chamfer 214 is provided at the connection between the bearing plane 211 and the second vertical plane 212. The second arc-shaped chamfer 214 can abut against the upper end of the shielding arm 500 and the guide surface 510. The second arc-shaped chamfer 214 contacts the arc surface of the shielding arm 500 and the guide surface 510, which can reduce wear and noise. The fact that the lower end of the guide surface 510 is lower than the upper end of the branch wall 110 can prevent the hook 210 from squeezing the shielding arm 500 due to the drive of the elastic member 400 when it reaches the lower end of the shielding arm 500, causing the shielding arm 500 to swing upward and open the slot 120.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 leveling device, characterized in that, It includes a card holder and a hook. The card holder is set on the inner wall of the hoistway, and at least two are symmetrically arranged about the car. The hook is set on the car and corresponds to the card holder. The card holder has an upward-opening slot on the side near the hook. An upward-sloping support plane is formed on the inner wall of the slot facing the hook. A first vertical plane is provided on the side of the slot opposite to the support plane. The first vertical plane extends upward to the upper end of the card holder. The lower end of the hook is provided with a hook part corresponding to the slot. The hook part is provided with a bearing plane that is inclined upward and corresponds to the support plane. A second vertical plane is provided on the side of the hook part near the card seat. The lower end of the bearing plane is connected to the lower end of the second vertical plane. The hook can swing toward the card holder so that the hook portion is accommodated in the card slot, and the bearing plane abuts against the supporting plane; When the hook is accommodated in the slot, a gap is formed between the second vertical plane and the first vertical plane.

2. The leveling device according to claim 1, characterized in that, The card holder has a branch wall facing the side close to the hook, and the card slot is formed at the upper end of the branch wall.

3. The leveling device according to claim 2, characterized in that, The side of the branch wall facing the hook has an inclined surface that slopes downwards in a direction away from the hook; When the car moves the hook from below the card seat upwards, the inclined surface can press against the second vertical plane, causing the hook to swing away from the card seat.

4. The leveling device according to claim 3, characterized in that, The upper end of the second vertical plane is provided with a first arc-shaped chamfer. When the car drives the hook to move upward from below the card seat, the first arc-shaped chamfer can abut against the inclined plane.

5. The leveling device according to claim 1, characterized in that, Also includes: Mounting bracket, which is installed on the car; The hook also includes a rod, the hook portion is disposed at the upper end of the rod, and the lower end of the rod is rotatably connected to the mounting base.

6. The leveling device according to claim 5, characterized in that, One side of the mounting base is provided with an arc-shaped hole along the swing path of the hook, and one side of the rod is provided with a limiting member passing through the arc-shaped hole.

7. The leveling device according to claim 6, characterized in that, Also includes: An elastic element is used to drive the limiting element to cause the rod to swing in the direction of the card seat.

8. The leveling device according to claim 7, characterized in that, The elastic element is a tension spring, and the two ends of the tension spring are respectively connected to the limiting element and the mounting base.

9. The leveling device according to claim 2, characterized in that, Also includes: The shielding arm is inclined downward, with its upper end rotatably connected to the card seat and its lower end abutting against the upper end of the branch wall to shield the card slot. The lower end of the shielding arm extends toward the hook and is exposed relative to the side of the branch wall closer to the hook. When the car moves the hook downward from above the card seat, the blocking arm can squeeze the hook to make the hook swing away from the card seat; When the car moves the hook upward from below the card slot, the hook can push the exposed end of the blocking arm to make the blocking arm swing upward to open the card slot.

10. The leveling device according to claim 9, characterized in that, The lower end of the shielding arm is provided with an upwardly inclined guide surface, and the lower end of the guide surface is lower than the upper end of the branch wall; A second arc-shaped chamfer is provided at the connection between the bearing plane and the second vertical plane, and the second arc-shaped chamfer can abut against the upper end of the shielding arm and the guide surface.

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