Safety assembly for lifting mechanism of electric shifting machine

Abstract

The utility model discloses a safety assembly for a lifting mechanism of an electric shifting machine, the lifting mechanism of the electric shifting machine comprises a belt wheel and a lifting belt wound on the belt wheel, the belt wheel realizes the retraction and release of the lifting belt under the action of a power mechanism, and the safety assembly is characterized in that the belt wheel is provided with a swinging sliding block and a connecting spring; one end of the swinging sliding block is hinged with the belt wheel, and the other end of the swinging sliding block is fixedly connected with one end of the connecting spring; limiting columns are arranged on the edges of the inner sides of the belt wheels, and limiting grooves matched with the limiting columns are formed in the swing sliding blocks. A plurality of safety fixing columns are arranged on the outer side of the belt wheel in the circumferential direction at intervals. The swing sliding block is provided with an upper arc face used for being in friction with the safety fixing columns to stop the belt wheel. By means of the design, the technical problem that when the lifting mechanism breaks down, a belt wheel loses self-locking force, and serious safety accidents are caused is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of overspeed protection of a transfer machine, in particular to a safety component used for a lifting mechanism of an electric transfer machine. Background Art

[0002] The overhead electric transfer machine is installed on a special track on the roof of a building or house. It uses the lifting or lowering, forward or backward functions of the crane and sling to achieve barrier-free transfer of the elderly and disabled from a bed or room to the bathroom, bathroom, dining room, living room, and then to a wheelchair or seat. The user can also operate the transfer by themselves throughout the process.

[0003] At present, the power unit of the common hanging electric transfer machine on the market mainly includes a motor for providing power, a worm gear for transmission, and a pulley (100) wound with a lifting belt (101). Therefore, in the application process of the hanging electric transfer machine, it is necessary to consider the safety hazards caused by the failure of the motor or the worm gear. When the motor or the worm gear fails, the pulley (100) will lose its self-locking force, thereby causing the lifted person to fall quickly, resulting in a very serious safety accident.

[0004] For example, the overspeed protection device installed on the hanging electric transfer machine disclosed in patent number CN109573779A achieves the purpose of preventing falling by inserting the baffle into the gap on the skeleton shell, but the overall structure is prone to damage to the skeleton shell. If the gap in the skeleton shell is too large, there is a risk of interception failure.

[0005] To this end, our company provides a safety component for the lifting mechanism of an electric transfer machine to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to overcome the defects in the prior art and provide a safety component for the lifting mechanism of an electric transfer machine.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] A safety component for an electric transfer machine lifting mechanism, the electric transfer machine lifting mechanism comprising a pulley and a lifting belt wound on the pulley, the pulley realizes the retraction and extension of the lifting belt under the action of a power mechanism, characterized in that a swinging slider and a connecting spring are provided on the pulley, one end of the swinging slider is hingedly connected to the pulley, and the other end is fixedly connected to one end of the connecting spring, and the other end of the connecting spring is fixed to the pulley;

[0009] A limiting column is provided at the inner edge of the pulley, and a limiting groove matching the limiting column is provided on the swing slider;

[0010] A plurality of safety fixing columns are also arranged at intervals in the circumferential direction on the outer side of the pulley, and the swinging slider is provided with an upper arc surface for rubbing against the plurality of safety fixing columns to stop the pulley.

[0011] Preferably, when the pulley rotates at a constant speed, the swing slider keeps rotating synchronously with the pulley under the tension of the connecting spring;

[0012] When the pulley rotates at an excessive speed, under the action of centrifugal force, one end of the swinging slider connected to the connecting spring swings outward from the pulley and rubs against a plurality of safety fixing columns until the instantaneous falling action of the pulley is completely stopped.

[0013] Preferably, one end of the swing slider is hingedly connected to the pulley via a slider fixing screw.

[0014] Preferably, the other end of the connecting spring is fixed to the pulley by a spring fixing screw.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] Compared with the existing technology for realizing personnel protection, the utility model is completely based on mechanical structure to realize more reliable and convenient maintenance, and solves the problem of sensor dependence on electric energy in different working environments. Once any meshing component in the core transmission part is damaged, the protection function will be triggered, thereby achieving 100% protection effect. Compared with the overspeed protection device installed on the hanging electric shift machine disclosed in patent number CN109573779A, the former achieves the purpose of preventing falling by inserting the baffle into the notch on the skeleton shell. The utility model has four safety fixing columns on the outer ring of the pulley, and the pulley has four chances to stop after one rotation, with higher protection efficiency, simpler structure and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a diagram of the utility model in the state of accelerated descent when an accident occurs.

[0019] In the figure: 100, pulley; 101, lifting belt; 1, swing slider; 11, limiting groove; 12, upper arc surface; 2, connecting spring; 3, limiting column; 4, safety fixing column; 5, slider fixing screw; 6, spring fixing screw. DETAILED DESCRIPTION

[0020] A preferred embodiment of the present invention will be described below in conjunction with the accompanying drawings to clearly and completely describe the technical solution in a preferred embodiment of the present invention.

[0021] A safety component for an electric shift lift lifting mechanism, the electric shift lift lifting mechanism comprising a pulley 100 and a lifting belt 101 wound around the pulley 100, the pulley 100 realizing the retraction and extension of the lifting belt 101 under the action of a power mechanism, characterized in that a swinging slider 1 and a connecting spring 2 are provided on the pulley 100, one end of the swinging slider 1 is hingedly connected to the pulley 100, and the other end is fixedly connected to one end of the connecting spring 2, and the other end of the connecting spring 2 is fixed to the pulley 100; a limiting column 3 is provided at the inner edge of the pulley 100, and the swinging slider 1 is provided with a limiting groove 11 matching the limiting column 3; a plurality of safety fixing columns 4 are also circumferentially spaced apart on the outer side of the pulley 100, and the swinging slider 1 is provided with an upper arc surface 12 for rubbing with the plurality of safety fixing columns 4 to stop the pulley 100.

[0022] Through the above design, the utility model provides a swinging slider 1 on the lifting mechanism inside the electric shift machine. When the relevant parts and components of the lifting mechanism and the gears of the power mechanism are accidentally broken, the centrifugal force generated by the over-speed rotation of the pulley 100 at the moment of fracture swings the swinging slider 1 outward of the pulley 100. At this time, the limiting column 3 blocks the swinging slider 1 through the limiting groove 11 of the swinging slider 1. The upper arc surface 12 of the swinging slider 1 rubs against the four safety fixing columns 4 arranged on the outer ring of the pulley 100 until it is completely stuck with one of the safety fixing columns 4, thereby completely stopping the instantaneous falling action, thereby ensuring that the personnel using the equipment are prevented from accidental injuries.

[0023] Specifically, when the pulley 100 rotates at a constant speed, the swing slider 1 keeps rotating synchronously with the pulley 100 under the tension of the connecting spring 2;

[0024] When the pulley 100 rotates at an excessive speed, under the action of centrifugal force, one end of the swing slider 1 connected to the connecting spring 2 swings outward from the pulley 100 and rubs against a plurality of safety fixing columns 4 until the instantaneous falling action of the pulley 100 is completely stopped.

[0025] Specifically, one end of the swing slider 1 is hingedly connected to the pulley 100 via a slider fixing screw 5 .

[0026] Specifically, the other end of the connecting spring 2 is fixed to the pulley 100 via a spring fixing screw 6 .

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety component for an electric lift lifting mechanism, the electric lift lifting mechanism comprising a pulley (100) and a lifting belt (101) wound around the pulley (100), wherein the pulley (100) realizes the retraction and extension of the lifting belt (101) under the action of a power mechanism, and is characterized in that: A swinging slider (1) and a connecting spring (2) are provided on the pulley (100); one end of the swinging slider (1) is hingedly connected to the pulley (100), and the other end is fixedly connected to one end of the connecting spring (2); and the other end of the connecting spring (2) is fixed to the pulley (100); A limiting column (3) is provided at the inner edge of the pulley (100), and a limiting groove (11) matching the limiting column (3) is provided on the swing slider (1); A plurality of safety fixing columns (4) are also arranged at intervals in the circumferential direction on the outer side of the pulley (100), and the swing slider (1) is provided with an upper arc surface (12) for rubbing against the plurality of safety fixing columns (4) to stop the pulley (100).

2. The safety assembly for the lifting mechanism of an electric transfer machine according to claim 1, characterized in that: When the pulley (100) rotates at a constant speed, the swing slider (1) keeps rotating synchronously with the pulley (100) under the pulling force of the connecting spring (2).

3. The safety assembly for the lifting mechanism of an electric transfer machine according to claim 1, characterized in that: When the pulley (100) rotates at an excessive speed, under the action of centrifugal force, one end of the swinging slider (1) connected to the connecting spring (2) swings outward from the pulley (100) and rubs against a plurality of safety fixing columns (4) until the instantaneous falling action of the pulley (100) is completely stopped.

4. The safety assembly for the lifting mechanism of an electric transfer machine according to claim 1, characterized in that: One end of the swing slider (1) is hingedly connected to the pulley (100) via a slider fixing screw (5).

5. The safety assembly for the lifting mechanism of an electric transfer machine according to claim 1, characterized in that: The other end of the connecting spring (2) is fixed on the pulley (100) via a spring fixing screw (6).

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