Emergency descending prevention device for aerial work platform

Abstract

The utility model provides a sudden descending prevention device for an aerial work platform, which relates to the technical field of lifting equipment and comprises a movable base, four rolling wheels are arranged at the bottom of the movable base; shear fork assemblies are arranged on the left side and the right side of the top of the movable base; a working platform body is arranged at the tops of the two shear fork assemblies, a micro air cylinder provides power to drive a limiting sliding rod to slide in a transmission sleeve, a ratchet wheel can be clamped into a ratchet groove through mutual cooperation of a connecting sliding block and a limiting through groove, and then the mechanical locking process of a first shear fork rod and a second shear fork rod is achieved; the device effectively prevents the work platform body from falling when a hydraulic lifting system in the device fails, improves the supporting stability of the shear fork assembly, is simple in locking structure and convenient to use and operate, and solves the problems that when an existing aerial work platform is used, the descending speed of the work platform is suddenly increased due to failure or misoperation of the hydraulic system, and the work stability is poor. And finally, the dangerous condition that the bottom is quickly impacted occurs.

Description

TECHNICAL FIELD

[0001] The utility model relates to lifting equipment technical field especially relates to a high altitude operation platform prevents the device of emergency lowering. BACKGROUND

[0002] The high altitude operation platform is a kind of equipment specially designed for high altitude operation, can safely, stably transport operating personnel, tool and material to the specified high altitude position, so as to carry out installation, maintenance, cleaning and construction etc. operation. High altitude operation platform is widely used in construction, electric power, warehousing, aviation and multiple fields.

[0003] The existing high altitude operation platform when using, by hydraulic system failure or improper operation, leading to the work platform drop speed increases sharply, finally appears the dangerous situation of rapid impact bottom, and platform directly falls to bottom, and the end of scissor arm and platform support surface will produce violent impact, can make metal component fatigue crack, shorten the service life of equipment. INNOVATION CONTENT

[0004] The utility model relates to a kind of high altitude operation platform prevents the device of emergency lowering, by miniature cylinder provides power and drives limit slide bar to slide in transmission sleeve, by the cooperation of connecting slider and limit through slot, can make ratchet wheel is connected in ratchet slot, further realize the mechanical locking process of first scissor lever and second scissor lever, effectively prevent equipment hydraulic lifting system failure when work platform main body drops, improve the stability of scissor assembly support, its locking structure is simple, and it is convenient to use and operate.

[0005] The utility model provides a kind of high altitude operation platform prevents the device of emergency lowering, specifically includes: mobile base, the mobile base bottom is equipped with four place rolling wheel;The mobile base top left and right sides are equipped with scissor assembly;Two places the scissor assembly top is equipped with work platform main body;The mobile base rear is equipped with escalator.

[0006] Further, the scissor assembly includes a first scissor lever, a second scissor lever and a miniature cylinder, the first scissor lever and the second scissor lever are distributed in an intersecting manner, and the second scissor lever is provided with a miniature cylinder at a middle position on one side.

[0007] Further, the first scissor lever is provided with a rotating sleeve at a middle position, and the rotating sleeve is provided with a ratchet groove at one end.

[0008] Further, the second scissor lever is provided with a transmission sleeve at a middle position, and the second scissor lever is rotatably connected to the rotating sleeve of the first scissor lever through the transmission sleeve, the transmission sleeve is provided with a mounting baffle at an end portion, and two limit through grooves are formed at a position close to the end portion of the transmission sleeve, and the two limit through grooves are distributed in a symmetrical manner.

[0009] Further, the telescopic rod end of the micro cylinder is provided with a limiting slide rod, the end of the limiting slide rod is provided with two connecting sliding blocks, the end of the limiting slide rod is provided with a ratchet gear, the ratchet gear is connected with the connecting sliding blocks, the limiting slide rod is slidably inserted into the transmission sleeve, the connecting sliding blocks are slidably connected with the transmission sleeve through limiting grooves, and the ratchet gear is matched with a ratchet groove.

[0010] Further, the top of the working platform body is provided with a protective fence, the top of the working platform body is provided with a fixing seat at a rear position, the bottom of the fixing seat is provided with two limiting insertion rods, the limiting insertion rods are vertically and parallelly distributed, and the limiting insertion rods are sleeved with compression springs.

[0011] Further, the top of the working platform body is provided with a protective fence, the top of the working platform body is provided with a fixing seat at a rear position, the bottom of the fixing seat is provided with two limiting insertion rods, the limiting insertion rods are vertically and parallelly distributed, and the limiting insertion rods are sleeved with compression springs.

[0012] The high-altitude working platform anti-quick-descending device has the following beneficial effects:

[0013] In the utility model, after the working platform body is lifted to the working height through the scissor assembly, the limiting slide rod is driven to slide in the transmission sleeve by the micro cylinder, the connecting sliding blocks and the limiting grooves are matched with each other, the ratchet gear can be clamped in the ratchet groove, the mechanical locking process of the first scissor rod and the second scissor rod is realized, the working platform body is prevented from falling when the hydraulic lifting system in the equipment fails, and the stability of the scissor assembly support is improved, the locking structure is simple, and the operation is convenient.

[0014] In addition, the fixing seat and the supporting bottom plate are arranged in the utility model, the limiting insertion rod and the limiting sleeve are slidably connected, the elastic effect of the compression spring is utilized, the working platform body can be buffered when descending to the bottom, the instantaneous impact force is converted into a gradual deceleration, the damage risk of the mechanical structure is reduced, and the service life of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings of the embodiments will be briefly introduced below.

[0016] The drawings in the following description only relate to some embodiments of the utility model, and are not limited to the utility model.

[0017] In the drawings:

[0018] Figure 1 The overall axial perspective view structural schematic diagram of the application is shown;

[0019] Figure 2 The scissor assembly structural schematic diagram of the application is shown;

[0020] Figure 3 The first scissor lever structure schematic diagram of the application is shown;

[0021] Figure 4 The second scissor lever and micro-cylinder split state structure schematic diagram of the application is shown; Figure 3 The A part enlarged structure schematic diagram in the application is shown;

[0022] Figure 5 The second scissor lever and micro-cylinder split state structure schematic diagram of the application is shown;

[0023] Figure 6 The second scissor lever and micro-cylinder split state structure schematic diagram of the application is shown; Figure 5 The B part enlarged structure schematic diagram in the application is shown;

[0024] Figure 7 The work platform main body structure schematic diagram of the application is shown;

[0025] Figure 8 The moving base, rolling wheel and staircase structure schematic diagram of the application is shown.

[0026] List of reference signs:

[0027] 1, moving base; 2, rolling wheel; 3, scissor assembly; 301, first scissor lever; 3011, rotating sleeve; 3012, ratchet groove; 302, second scissor lever; 3021, transmission sleeve; 3022, mounting baffle; 3023, limiting through slot; 303, micro-cylinder; 3031, limiting sliding rod; 3032, connecting sliding block; 3033, ratchet gear; 4, work platform main body; 401, guardrail; 402, fixed seat; 403, limiting insertion rod; 404, compression spring; 5, staircase; 501, support bottom plate; 502, limiting sleeve. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Embodiment one: please refer to Figures 1 to 8 :

[0030] The utility model proposes a kind of aerial work platform prevents emergency lowering device, comprising: moving base 1, the bottom of moving base 1 is equipped with four rolling wheels 2;The top of moving base 1 left and right sides is equipped with scissor assembly 3;Two scissor assemblies 3 top are equipped with work platform main body 4;The rear of moving base 1 is equipped with staircase 5;

[0031] The scissor assembly 3 comprises a first scissor rod 301, a second scissor rod 302 and a micro cylinder 303, the first scissor rod 301 and the second scissor rod 302 are distributed in a cross manner, and the micro cylinder 303 is arranged at a middle position of one side of the second scissor rod 302.

[0032] In the embodiment, as shown in the figure, Figures 3 to 6 A rotating sleeve 3011 is arranged at a middle position of the first scissor rod 301, and a ratchet groove 3012 is arranged at one end of the rotating sleeve 3011;

[0033] A transmission sleeve 3021 is arranged at a middle position of the second scissor rod 302, and the second scissor rod 302 is rotationally connected with the rotating sleeve 3011 of the first scissor rod 301 through the transmission sleeve 3021, an installation baffle 3022 is arranged at an end of the transmission sleeve 3021, two limiting through grooves 3023 are arranged at the end position of the transmission sleeve 3021, and the two limiting through grooves 3023 are symmetrically distributed;

[0034] A limiting slide rod 3031 is arranged at an end of an extension rod of the micro cylinder 303, two connecting slide blocks 3032 are arranged at an end of the limiting slide rod 3031, a ratchet gear 3033 is arranged at the end of the limiting slide rod 3031, the ratchet gear 3033 is connected with the connecting slide block 3032, the limiting slide rod 3031 is slidingly inserted into the transmission sleeve 3021, the connecting slide block 3032 is slidingly connected with the transmission sleeve 3021 through the limiting through groove 3023, and the ratchet gear 3033 is matched with the ratchet groove 3012. In the utility model, power is provided by a hydraulic lifting system, after the work platform main body 4 is lifted to a working height by the scissor assembly 3, power is provided by the micro cylinder 303 to drive the limiting slide rod 3031 to slide in the transmission sleeve 3021, the connecting slide block 3032 and the limiting through groove 3023 are matched with each other, the ratchet gear 3033 can be clamped in the ratchet groove 3012, and then the mechanical locking process of the first scissor rod 301 and the second scissor rod 302 is realized.

[0035] In the embodiment, as shown in the figure, Figure 7 and Figure 8 A protective fence 401 is arranged at the top of the work platform main body 4, a fixing seat 402 is arranged at the top of the work platform main body 4 and at a rear side position, two limiting insertion rods 403 are arranged at the bottom of the fixing seat 402 and are vertically and parallelly distributed, and a compression spring 404 is sleeved on the limiting insertion rod 403;

[0036] The front side of the top of the escalator 5 is provided with a supporting bottom plate 501, and the supporting bottom plate 501 is located below the working platform body 4, and the top of the supporting bottom plate 501 is provided with two limiting sleeves 502, the limiting inserting rod 403 is slidably penetrated through the limiting sleeve 502, and the compression spring 404 is supported between the fixing seat 402 and the limiting sleeve 502, and the utility model discloses the fixing seat 402 and the supporting bottom plate 501 are arranged, the limiting inserting rod 403 is slidably inserted into the limiting sleeve 502, and the elastic effect of the compression spring 404 is utilized, so that the working platform body 4 can be buffered when descending to the bottom.

[0037] The working principle of the embodiment is as follows: in use, power is provided by a hydraulic lifting system, the working platform body 4 is lifted to a working height through the scissor assembly 3, and then the limiting sliding rod 3031 is driven to slide in the transmission sleeve 3021 by the micro pneumatic cylinder 303, the connecting sliding block 3032 and the limiting through slot 3023 are matched with each other, the ratchet gear 3033 is clamped in the ratchet tooth groove 3012, and then the mechanical locking process of the first scissor rod 301 and the second scissor rod 302 is realized; the fixing seat 402 and the supporting bottom plate 501 are arranged, the limiting inserting rod 403 is slidably inserted into the limiting sleeve 502, and the elastic effect of the compression spring 404 is utilized, so that the working platform body 4 can be buffered when descending to the bottom.

[0038] The embodiments of the utility model are given for the purpose of example and description, and are not exhaustive or limit the utility model to the disclosed forms. Many modifications and changes are obvious to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical application of the utility model, and to enable those skilled in the art to understand the utility model so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. An aerial work platform panic drop prevention device, characterized in that, Include: Mobile base (1), the bottom of the mobile base (1) is provided with four rolling wheels (2); the top of the mobile base (1) is provided with scissor assemblies (3) on the left and right sides; two scissor assemblies (3) are provided on the top of the mobile base (1); the rear of the mobile base (1) is provided with a staircase (5); The scissor assembly (3) comprises a first scissor rod (301), a second scissor rod (302) and a micro cylinder (303), the first scissor rod (301) and the second scissor rod (302) are distributed in a cross manner, and the micro cylinder (303) is arranged at the middle position of one side of the second scissor rod (302); The first scissor rod (301) is provided with a rotating sleeve (3011) at the middle position, and the rotating sleeve (3011) is provided with a ratchet groove (3012) at one end; The second scissor rod (302) is provided with a transmission sleeve (3021) at the middle position, and the second scissor rod (302) is rotatably connected with the rotating sleeve (3011) of the first scissor rod (301) through the transmission sleeve (3021), the transmission sleeve (3021) is provided with a mounting baffle (3022) at the end, and two limiting through grooves (3023) are formed in the end position of the transmission sleeve (3021) and are distributed in a symmetrical manner; The end of the micro cylinder (303) is provided with a limiting slide rod (3031), the end of the limiting slide rod (3031) is provided with two connecting sliding blocks (3032), the end of the limiting slide rod (3031) is provided with a ratchet gear (3033), and the ratchet gear (3033) is connected with the connecting sliding block (3032), the limiting slide rod (3031) is slidably inserted into the transmission sleeve (3021), the connecting sliding block (3032) is slidably connected with the transmission sleeve (3021) through the limiting through groove (3023), and the ratchet gear (3033) is matched with the ratchet groove (3012).

2. The aerial work platform anti-panic device according to claim 1, characterized in that, The top of the work platform body (4) is provided with a protective fence (401), and the top of the work platform body (4) is provided with a fixed seat (402) at the rear side position, the bottom of the fixed seat (402) is provided with two limiting insertion rods (403), and the two limiting insertion rods (403) are distributed in a vertical parallel manner, and the limiting insertion rod (403) is sleeved with a compression spring (404).

3. The aerial work platform anti-panic device according to claim 1, characterized in that, The top of the staircase (5) is provided with a supporting bottom plate (501), and the supporting bottom plate (501) is located below the work platform body (4), the top of the supporting bottom plate (501) is provided with two limiting sleeves (502), the limiting insertion rod (403) is slidably penetrated through the limiting sleeve (502), and the compression spring (404) is supported between the fixed seat (402) and the limiting sleeve (502).

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