Lifting system capable of effectively reducing pit depth

Abstract

The utility model discloses a lifting system capable of effectively reducing the depth of a bottom pit, which comprises a lifting device, the bottom pit and a buffer device, and the lifting device comprises a lifting unit which performs lifting motion along the vertical direction; the bottom pit is located below the lifting stroke of the lifting unit; the buffer device comprises a buffer and a collision plate which are correspondingly arranged, and the buffer is arranged on the pit surface of the bottom pit; the collision plate is arranged on the lifting unit and located above the bottom face of the lifting unit. Therefore, when the lifting unit is subjected to buffering stress, the effective carrying space in the lifting unit can extend downwards to the position below the height of the compressed buffer, and the depth of the pit is effectively reduced. Through reasonable arrangement of the buffer and the collision plate, the distance space between the lifting unit and the pit can be utilized to the maximum extent under the condition that the depth of the pit is limited, and the distance space is not influenced by the height of the buffer.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevators, and in particular relates to a lifting system which can effectively reduce the depth of a pit. Background Art

[0002] A buffer is provided in the pit at the end of the travel of the lifting unit (lifting platform or lifting box) of the elevator to buffer the lifting unit when it descends beyond the travel, thereby reducing the impact force between the lifting unit and the pit.

[0003] There are generally two types of existing elevator buffers. One is an energy storage buffer, typically a polyurethane buffer, which relies on its own compression deformation for buffering. During the buffering process, the force is uneven and the reaction force is large. The other is an energy consumption buffer, generally a hydraulic buffer, which mainly relies on the hydraulic damping effect to buffer the objects acting on it. During the buffering process, the force is relatively uniform and the reaction force is small, but its compression stroke can only reach 30%-40% of its own free height, or even lower, so it requires a larger space.

[0004] The interior space of modern buildings is compact, and the pit space (height) is often insufficient. How to increase the buffer stroke of the elevator in a limited space is an urgent problem to be solved. Utility Model Content

[0005] The utility model provides a lifting system that can effectively reduce the depth of the pit. The specific scheme is as follows:

[0006] A lifting system capable of effectively reducing the depth of a pit, comprising:

[0007] A lifting device, the lifting device comprising a lifting unit that performs lifting movement in a vertical direction;

[0008] A bottom pit, the bottom pit being located below the lifting stroke of the lifting unit;

[0009] A buffer device, the buffer device comprising a correspondingly arranged buffer and a collision plate, the buffer being arranged on the pit surface of the bottom pit; the collision plate being arranged on the lifting unit and being located above the bottom surface of the lifting unit;

[0010] Therefore, when the lifting unit is buffering the force, the effective carrying space inside it can be lowered to a position below the height of the buffer after being compressed, effectively reducing the depth of the pit.

[0011] Furthermore, the lifting device also includes a guide rail and a guide groove corresponding to the guide rail, and the guide rail is arranged at intervals on both sides of the lifting unit; the guide groove is arranged on both side walls of the lifting unit, and the notch of the guide groove is matched with the guide rail, so that the lifting unit can slide up and down along the guide rail.

[0012] Furthermore, the buffer is arranged on the pit surface of the side of the orthographic projection of the lifting unit, and the collision plate is arranged on the side wall of the lifting unit.

[0013] Furthermore, the bottom surface of the lifting unit is a ladder-shaped structure, including a lower surface and a higher surface, the buffer is arranged on the pit surface of the orthographic projection of the higher surface; the collision plate is arranged at the higher surface.

[0014] Furthermore, the buffer is an energy-consuming buffer.

[0015] Furthermore, the guide rail is reinforced to overcome the bending moment to which the lifting unit is subjected during the buffering process.

[0016] Furthermore, the guide rail is a T-shaped structure.

[0017] Furthermore, the buffer device is provided with several groups to reduce the bending moment received by the lifting unit during the buffering process.

[0018] The beneficial effect of the utility model is that, through the reasonable arrangement of the buffer and the impact plate, when the lifting unit is subjected to buffering force, the effective carrying space inside the utility model can be lowered to a position below the height of the buffer after being compressed. Compared with the conventional arrangement, the requirement for the depth of the pit can be effectively reduced while ensuring the same buffering stroke, thereby maximizing the use of the distance space between the lifting unit and the pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A front view of a lifting system that can effectively reduce the depth of a pit provided by an embodiment of the utility model;

[0020] Figure 2 A top view of a lifting system that can effectively reduce the depth of a pit provided by an embodiment of the utility model;

[0021] Figure 3 A front view of a lifting system that can effectively reduce the depth of a pit provided by another embodiment of the utility model;

[0022] Figure 4 A top view of a lifting system that can effectively reduce the depth of a pit provided by another embodiment of the utility model;

[0023] Numbers in the figure: 1, lifting device; 11, lifting unit; 111, lower surface; 112, upper surface; 12, guide rail; 13, guide groove; 131, notch; 2, bottom pit; 3, buffer device; 31, buffer; 32, impact plate. DETAILED DESCRIPTION

[0024] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0026] It should be noted here that the buffer stroke of the lifting system refers to the range of travel in which the buffer starts to work and mitigates the impact when the lifting unit reaches the highest or lowest limit stroke during the lifting process. This range of travel is designed to ensure that the lift can decelerate and stop smoothly when it reaches the limit stroke, thereby protecting the lift structure, the safety of passengers and cargo, and avoiding damage to the equipment or injury to personnel.

[0027] Example 1

[0028] Please refer to Figure 1 , 2The present embodiment provides a lifting system that can effectively reduce the depth of the pit, including: a lifting device 1, a pit 2, and a buffer device 3 for buffering the impact force between the lifting device 1 and the pit 2. Specifically, the lifting device 1 includes a lifting unit 11, a guide rail 12, and a guide groove 13 corresponding to the guide rail 12. The lifting unit 11 can perform lifting movement in the vertical direction. The guide rails 12 are arranged at intervals on both sides of the lifting unit 11. The guide groove 13 is arranged on the two side walls of the lifting unit 11, and the notch 131 of the guide groove 13 is matched with the guide rail 12, so that the lifting unit 11 can perform lifting movement along the guide rail 12 within the lifting stroke in the vertical direction. The pit 2 is located below the lifting stroke of the lifting unit 11. The buffer device 3 is arranged between the lifting unit 11 and the pit 2, and includes a correspondingly arranged buffer 31 and a collision plate 32. The buffer 31 is arranged on the pit surface on the side of the positive projection of the lifting unit 11, and the collision plate 32 is arranged on the side wall of the lifting unit 11. With this arrangement, after the lifting unit 11 moves beyond the stroke, the collision plate 32 located on the side of the lifting unit 11 contacts the buffer 31 to buffer the force. Compared with the conventional arrangement of the buffer device 3 between the lifting unit 11 and the pit 2, the effective carrying space inside the lifting unit 11 can be lowered to a position below the height of the buffer 31 after compression, that is, compared with the conventional arrangement, the requirement for the depth of the pit 2 can be effectively reduced while ensuring the same buffer stroke, and the distance space between the lifting unit 11 and the pit 2 can be maximized, and it is not affected by the height of the buffer 31 itself. It should be noted here that the lifting system of this embodiment can be an elevator, a hoist, a logistics hoist, a medical logistics hoist, etc.

[0029] Preferably, the buffer 31 is an energy-absorbing buffer, which can greatly improve the buffering effect of the lifting system, so that the reaction force on the lifting unit 31 and the pit 2 is relatively small.

[0030] Furthermore, since the buffering reaction force received by the lifting unit 11 is not on its positive projection, the entire lifting unit 11 is subjected to a large bending moment, which generates a large lateral force on the guide rail. Therefore, it is necessary to perform corresponding force analysis and strengthen the guide rail 12 according to the situation, or set up several groups of guide rails 12 to overcome the bending moment received by the lifting unit 11 during the buffering process.

[0031] Preferably, the guide rail 12 is a T-shaped structure, including a horizontal piece and a vertical piece vertically arranged in the middle of the horizontal piece, and the notch 131 of the guide groove 13 can be clamped with the vertical piece and slide up and down along the vertical piece. In addition, in order to strengthen the guide rail 12 and reduce the influence of the bending moment on the guide rail 12, a plurality of brackets can be arranged at intervals in the length direction of the guide rail 12 to support and protect the guide rail 12, one end of the bracket clamps the horizontal piece of the guide rail 12, and the other end is fixed on the pit surface of the bottom pit 2. Furthermore, the brackets can be densely arranged at the position where the guide rail 12 is subjected to the bending moment.

[0032] Furthermore, a plurality of buffer devices 3 may be provided at the same time, rather than a single one, so as to effectively reduce the bending moment generated on the lifting unit 11 .

[0033] In summary, this embodiment uses the side-placed buffer device to maximize the use of the distance space between the lifting unit 11 and the pit 2 when the depth of the pit 2 is limited, reduce the requirement for the depth of the pit 2, and is not affected by the height of the buffer 31 itself; the use of energy-absorbing buffers can greatly improve the buffering effect, so that the reaction force exerted on the lifting unit 11 and the pit 2 during the buffering process is relatively small; in addition, through force analysis, the number and position of the guide rails 12 and the buffer device 3 are reasonably set, which can effectively reduce the bending moment generated on the lifting unit 11 and improve the stability and safety of the system.

[0034] Example 2

[0035] Please refer to Figure 3 , 4 The present embodiment provides a lifting system that can effectively reduce the depth of a pit, including: a lifting device 1, a pit 2, and a buffer device 3 for buffering the impact force between the lifting device 1 and the pit 2. Specifically, the lifting device 1 includes a lifting unit 11, a guide rail 12, and a guide groove 13 corresponding to the guide rail 12. The lifting unit 11 can perform lifting movement in the vertical direction, and its bottom surface is arranged in a stepped shape, including a low surface 111 and a high surface 112. The guide rails 12 are arranged at intervals on both sides of the lifting unit 11, and the guide grooves 13 are arranged on the two side walls of the lifting unit 11, and the notches 131 of the guide grooves 13 are arranged in conjunction with the guide rails 12, so that the lifting unit 11 can perform lifting movement along the guide rails 12 within the lifting stroke in the vertical direction. The pit 2 is located below the lifting stroke of the lifting unit 11. The buffer device 3 is arranged between the lifting unit 11 and the pit 2, and includes a buffer 31 and a striker 32 which are arranged accordingly. The buffer 31 is arranged on the pit surface of the positive projection of the high surface 112, and the striker 32 is arranged on the high surface 112 of the lifting unit 11. With such an arrangement, after the lifting unit 11 moves beyond the stroke, the striker 32 located at the high surface 112 of the bottom surface of the lifting unit 11 contacts the buffer 31 to buffer the force. Since the striker 32 is located at the high surface 112 of the lifting unit 11, and part of the space in the lifting unit 11 is located below the striker 32 at this time, it is equivalent to that the effective carrying space inside the lifting unit 11 can be probed to a position below the height after the buffer 31 is compressed, that is, compared with the conventional arrangement, the requirement for the depth of the pit 2 can be effectively reduced while ensuring the same buffer stroke, and the distance space between the lifting unit 11 and the pit 2 can be maximized.

[0036] The other configurations of this embodiment are the same as those of Embodiment 1 and will not be described in detail here.

[0037] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A lifting system that can effectively reduce the depth of a pit, characterized in that: include: A lifting device (1), the lifting device (1) comprising a lifting unit (11) that performs lifting movement in a vertical direction; A bottom pit (2), the bottom pit (2) being located below the lifting stroke of the lifting unit (11); A buffer device (3), the buffer device (3) comprising a buffer (31) and a collision plate (32) which are arranged accordingly, the buffer (31) being arranged on the pit surface of the bottom pit (2); the collision plate (32) being arranged on the lifting unit (11) and being located above the bottom surface of the lifting unit (11); Therefore, when the lifting unit (11) is buffering force, the effective carrying space inside it can be lowered to a position below the height of the buffer (31) after being compressed, thereby effectively reducing the depth of the bottom pit (2).

2. The lifting system according to claim 1, characterized in that: The lifting device (1) further comprises a guide rail (12) and a guide groove (13) corresponding to the guide rail (12); the guide rail (12) is arranged at intervals on both sides of the lifting unit (11); the guide groove (13) is arranged on both side walls of the lifting unit (11), and the notch (131) of the guide groove (13) is matched with the guide rail (12), so that the lifting unit (11) can slide up and down along the guide rail (12).

3. The lifting system according to claim 2, characterized in that: The buffer (31) is arranged on a pit surface on the side of the orthographic projection of the lifting unit (11), and the collision plate (32) is arranged on a side wall of the lifting unit (11).

4. The lifting system according to claim 2, characterized in that: The bottom surface of the lifting unit (11) is a ladder-shaped structure, including a lower surface (111) and a higher surface (112); the buffer (31) is arranged on a pit surface of an orthographic projection of the higher surface (112); and the collision plate (32) is arranged on the higher surface (112).

5. The lifting system according to claim 1, characterized in that: The buffer (31) is an energy-consuming buffer.

6. The lifting system according to claim 2, characterized in that: The guide rail (12) is a T-shaped structure.

7. The lifting system according to claim 1, characterized in that: The buffer device (3) is provided with a plurality of groups to reduce the bending moment applied to the lifting unit (11) during the buffering process.

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