An elevator pit maintenance buffer protection device
The elevator pit maintenance buffer protection device, which combines elevator guide rails, buffer columns, and steel wire ropes, solves the problem that existing devices cannot provide pre-pressure buffering, and achieves protection against elevator car failure and fall, as well as a compact design of the device in a small space.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-07-14
- Publication Date
- 2026-07-14
AI Technical Summary
Existing elevator pit protection devices cannot provide pre-pressure buffering. Direct impact from the elevator car causes increased spring travel, and the device cannot be reduced in size within a small space, posing safety hazards and irreparable damage.
Design an elevator pit maintenance buffer protection device that utilizes a combination of elevator guide rails, buffer columns, attachment frames, and steel wire ropes. The attachment frames are connected by tension springs through steel wire ropes, and the pressure of the buffer columns is pre-adjusted to withstand the pressure of the elevator car falling in case of failure.
It protects maintenance personnel from damage caused by direct impact when the elevator fails and falls, and effectively reduces the size of the device in a limited space.
Smart Images
Figure CN224493352U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of elevator technology, and specifically to an elevator pit maintenance buffer protection device. Background Technology
[0002] With the widespread use of elevators, elevator maintenance has become increasingly important. During elevator maintenance, some unexpected events may occur, threatening the safety of maintenance personnel. For example, a sudden power outage, misoperation by maintenance personnel, uneven weight distribution, or failure of the traction machine brake may all cause the elevator to suddenly descend to the pit, thereby injuring or even killing maintenance personnel.
[0003] To ensure the safety of maintenance personnel, protective devices need to be installed in the elevator pit. For example, Chinese Patent Publication No. CN202643031U describes an elevator pit maintenance protection device, which includes a top rope block, a rotatable rope pressing block, a hook with two positions, and a speed governor wire rope connected to the elevator safety gear. The speed governor wire rope is located between the movable end of the rope pressing block and the top rope block, and the rope pressing block can be positioned at any position of the hook.
[0004] The protective device structure provided by this patent cannot provide pre-pressure. Direct impact from the elevator car will increase the spring's travel. At the same time, direct impact without buffering will cause irreparable damage to the elevator. The size of the protective device cannot be reduced in a small pit space. Utility Model Content
[0005] To solve the above problems, this utility model provides an elevator pit maintenance buffer protection device.
[0006] The technical solution adopted by this utility model to solve its technical problem is: an elevator pit maintenance buffer protection device, which mainly consists of an elevator car, an elevator guide rail, a buffer column, and an attachment frame; the elevator guide rail stands on the side of the elevator car to cooperate with the elevator's up and down movement; two attachment frames are provided on the buffer column, the buffer column is a square column with curled edges and hollow interior, and the attachment frames are connected to the buffer column by an embedded method; the buffer column is provided with a tension spring, locking screws, wheel seats, pulleys and steel wire ropes, the tension spring and wheel seats are respectively fixedly connected to the two ends inside the buffer column, the two ends of the pulley are movably inserted and installed on the wheel seats, the steel wire rope passes around the pulley in the middle, and the two ends of the steel wire rope are respectively connected to the tension spring and one of the attachment frames; locking screws are provided on both sides of the attachment frame, and the attachment frame is fixed and locked to the elevator guide rail by the locking screws.
[0007] Preferably, the attachment frame is U-shaped and extends outward from the side of the buffer post, and the attachment frame can slide up and down inside the buffer post.
[0008] Preferably, the bottom of the attachment frame is provided with a plurality of evenly arranged adjustment holes.
[0009] Preferably, the end of the wire rope is provided with a barb, which connects the wire rope to the attachment frame.
[0010] Preferably, the attachment frame consists of two vertically arranged frames inside the buffer column.
[0011] The beneficial effects of this utility model are: by connecting the tension spring with the steel wire rope in the adjustment holes of different attachment frames, the pressure of the buffer column on the attachment frame can be increased in advance, so that the buffer column can withstand the pressure of the elevator car falling due to failure. The design is ingenious and easy to use. Attached Figure Description
[0012] Figure 1 This is a perspective view of a buffer protection device for elevator pit maintenance.
[0013] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle.
[0014] Figure 3 An isometric drawing of an elevator pit maintenance buffer protection device.
[0015] Figure 4 for Figure 3 Enlarged view of section B in the middle.
[0016] In the diagram: 1. Elevator car; 12. Elevator guide rail; 2. Tension spring; 3. Buffer column; 4. Attachment frame; 41. Locking screw; 5. Wheel seat; 51. Pulley; 6. Wire rope; 61. Barb; 7. Adjustment hole. Detailed Implementation
[0017] To make the technical solution of this utility model clearer, the present utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the terms "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.
[0018] like Figure 1-4As shown, the elevator pit maintenance buffer protection device of this utility model consists of an elevator car 1, an elevator guide rail 12, a buffer column 3, and an attachment frame 4 as the main components. The elevator guide rail 12 stands on the side of the elevator car 1 to cooperate with the elevator's up and down movement. Two attachment frames 4 are provided on the buffer column 3. The buffer column 3 is a square column with curled edges and a hollow interior, and the attachment frames 4 are connected to the buffer column 3 by an embedded method. The buffer column 3 is equipped with a tension spring 2, a locking screw 41, a wheel seat 5, a pulley 51, and a steel wire rope 6. The tension spring 2 and the wheel seat 5 are respectively fixedly connected to the two ends inside the buffer column 3. The two ends of the pulley 51 are movably inserted and installed on the wheel seat 5. The steel wire rope 6 passes around the pulley 51 in the middle, and the two ends of the steel wire rope 6 are respectively connected to the tension spring 2 and one of the attachment frames 4. The attachment frame 4 is provided with locking screws 41 on both sides, and the attachment frame 4 is fixedly locked to the elevator guide rail 12 by the locking screws 41.
[0019] In this embodiment, the attachment frame 4 extends outward from the side of the buffer post 3 in a U-shape, and the attachment frame 4 can slide up and down inside the buffer post 3.
[0020] In this embodiment, the bottom of the attachment frame 4 is provided with a plurality of evenly arranged adjustment holes 7.
[0021] In this embodiment, the end of the wire rope 6 is provided with a barb 61, which connects the wire rope 6 to the attachment frame 4.
[0022] In this embodiment, the attachment frame 4 consists of two vertically arranged frames inside the buffer column 3.
[0023] When using
[0024] First, the tension spring 2 is connected to the adjustment hole 7 of different attachment frames 4 by the steel wire rope 6, thereby pre-adjusting the pressure of the buffer column 3 on the attachment frame 4. So that when the elevator car 1 fails and falls, the buffer column 3 can bear the pressure when the elevator car 1 fails and falls.
[0025] Furthermore, when maintenance workers need to enter the pit to perform maintenance on the elevator, they first insert the attachment frame 4 into the elevator guide rail 12, and then rotate the locking screw 41 to fix and lock the attachment frame 4 onto the elevator guide rail 12.
[0026] When elevator car 1 fails and falls, it will land on the buffer column 3, thus protecting the lives of maintenance personnel in the pit at the bottom of elevator car 1.
[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A buffer protection device for elevator pit maintenance, characterized in that: The system comprises an elevator car, elevator guide rails, a buffer column, and attachment frames. The elevator guide rails stand on the side of the elevator car to facilitate its vertical movement. Two attachment frames are installed on the buffer column, which is a square column with curled edges and a hollow interior. The attachment frames are connected to the buffer column by an embedded method. The buffer column contains a tension spring, locking screws, wheel seats, pulleys, and a steel wire rope. The tension spring and wheel seats are fixedly connected to both ends of the buffer column. The pulleys are movably inserted into the wheel seats at both ends. The steel wire rope passes around the pulley in the middle, and both ends are connected to the tension spring and one of the attachment frames. Locking screws are installed on both sides of the attachment frames to secure them to the elevator guide rails.
2. The elevator pit maintenance buffer protection device according to claim 1, characterized in that: The attachment frame is U-shaped and extends outward from the side of the buffer post. The attachment frame can slide up and down inside the buffer post.
3. The elevator pit maintenance buffer protection device according to claim 1, characterized in that: The bottom of the attachment frame is provided with multiple evenly arranged adjustment holes.
4. The elevator pit maintenance buffer protection device according to claim 1, characterized in that: The wire rope is equipped with a barb at its end, which is used to connect the wire rope to the attachment frame.
5. The elevator pit maintenance buffer protection device according to claim 1, characterized in that: The attachment frame consists of two vertically arranged frames inside the buffer column.