CN112127613A

CN112127613A - Automatic ratchet wheel positioning is in coordination with centrifugal anti-falling guide's of atress frame that climbs

Info

Publication number: CN112127613A
Application number: CN202010939179.2A
Authority: CN
Inventors: 沈海晏; 吕光利; 陈恒飞
Original assignee: Shenzhen Techen Technology Co Ltd
Current assignee: Shenzhen Techen Technology Co Ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2020-12-25

Abstract

The invention discloses a climbing frame of an automatic ratchet wheel positioning and collaborative stress centrifugal anti-falling guide seat, which comprises a guide rail, a plurality of wall-attached guide seats and an anti-falling device, wherein the anti-falling device comprises a positioning anti-falling wheel, an elastic pre-tightening device and a pawl, the side part of the positioning anti-falling wheel is provided with ratchet teeth, the elastic pre-tightening device is adjusted to a first pre-tightening state when the guide rail needs to ascend, the distance between the pawl and the ratchet teeth enables the ratchet teeth to be meshed with the pawl, in the process that the guide rail ascends and rotates anticlockwise, the pawl is pulled away from the ratchet teeth through the mutual thrust of an inclined plane when the positioning anti-falling wheel collides with the pawl so that the ratchet teeth can rotate and pass, in the process that the guide rail descends and rotates clockwise, the ratchet teeth; when the guide rail needs to descend, the elastic pre-tightening device is adjusted to be in the second pre-tightening state, and the distance between the pawl and the ratchet wheel teeth enables the pawl to be separated from the ratchet wheel teeth.

Description

Automatic ratchet wheel positioning is in coordination with centrifugal anti-falling guide's of atress frame that climbs

Technical Field

The invention relates to the field of building climbing frames, in particular to a climbing frame of an automatic ratchet wheel positioning and stress-cooperating centrifugal anti-falling guide seat.

Background

The positioning falling protector of the prior climbing frame has the defects of manual adjustment and positioning, complex structure, high processing cost, high maintenance cost, unreliable potential safety hazard and the like, and is only suitable for the climbing frame which crawls in one direction.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a climbing frame of an automatic ratchet wheel positioning and stress-cooperating centrifugal anti-falling guide seat, aiming at the defects in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: a climbing frame of an automatic ratchet wheel positioning and stress-cooperating centrifugal anti-falling guide seat is constructed, which comprises a guide rail matched with a sliding sleeve and a plurality of wall-attached guide seats, and the anti-falling device is arranged on the wall-attached guide seat and used for preventing the guide rail from descending, the anti-falling device comprises a positioning anti-falling wheel, an elastic pre-tightening device which can be adjusted to a first pre-tightening state or a second pre-tightening state, and a pawl positioned on the side part of the positioning anti-falling wheel, the side part of the positioning anti-falling wheel is provided with ratchet teeth, the elastic pre-tightening device is used for providing pre-tightening force which is used for maintaining the distance between the pawl and the ratchet teeth along the axial direction of the positioning anti-falling wheel, the distance of the pawl relative to the ratchet wheel teeth when the elastic pretensioning device is in the first pretensioning state enables the ratchet wheel teeth and the pawl to be engaged, when the elastic pre-tightening device is in a second pre-tightening state, the distance between the pawl and the ratchet wheel teeth enables the pawl to be disengaged from the ratchet wheel teeth;

when the guide rail needs to ascend, the elastic pre-tightening device is adjusted to be in the first pre-tightening state, and in the process that the positioning anti-falling wheel rotates anticlockwise due to the ascending of the guide rail, when the ratchet teeth and the pawls collide, the pawls are pulled away relative to the ratchet teeth by overcoming the pre-tightening force through the mutual thrust of the inclined surfaces so that the ratchet teeth can rotate and pass; during clockwise rotation of the positioning anti-falling wheel due to descending of the guide rail, the ratchet teeth are engaged with the pawl to prevent the ratchet teeth from rotating to pass through; when the guide rail needs to descend, the elastic pre-tightening device is adjusted to the second pre-tightening state.

Preferably, the elastic pre-tightening device comprises a tension spring and a knob, two ends of the tension spring are respectively connected with the pawl through a positioning pin, the knob is connected with the positioning pin, the positioning anti-falling wheel is sleeved on the rotating wheel shaft, the tension spring is assembled in the rotating wheel shaft, the knob is movably sleeved in the end part of the rotating wheel shaft and is connected with the end part of the tension spring, the pawl is sleeved outside the rotating wheel shaft, a positioning groove with a first positioning position and a second positioning position is formed in the rotating wheel shaft, the distance from the first positioning position to the center of the rotating wheel shaft is smaller than the distance from the second positioning position to the center of the rotating wheel shaft, the positioning pin penetrates through the positioning groove, when the positioning pin is located at the first positioning position, the elastic pre-tightening device is in the first pre-tightening state, when the positioning pin is located at the second positioning position, the elastic pre-tightening device is in the second pre-tightening state, and the positioning pin can be driven to switch between the first positioning position and the second positioning position by operating the knob.

Preferably, the location is prevented weighing down and is set up in the wheel and can follow the gliding centrifugal slider of the radial direction of wheel is prevented weighing down in the location, it is provided with detains the position to attach the wall guide holder prevent weighing down the clockwise overspeed rotation of wheel in the location, centrifugal slider follows under the centrifugal force effect the radial direction roll-off of wheel is prevented weighing down in the location, as centrifugal slider roll-off as far as when detaining the position cooperation the wheel stall is prevented weighing down in the location and support the guide rail.

Preferably, attach the wall guide holder and be provided with the installation a pair of mounting panel of anti-falling device, a pair of mounting panel is located the both sides of preventing weighing down the wheel in the location, a pair of pawl is located respectively the outside of a pair of mounting panel, the location is prevented weighing down the wheel and is included cylindricality portion and follow the perisporium of cylindricality portion along radial convex teeth of a cogwheel, cylindricality portion overlaps in the runner hub, the mounting panel is provided with the installation the cavity of cylindricality portion, it sets up to detain the position just be located on the inner wall of cavity the location is prevented weighing down the top at axle center place horizontal plane of wheel, stretching out of cylindricality portion the tip protrusion of cavity forms ratchet tooth, the lieing in of cylindricality portion mounting groove, each have been seted up along radial direction to the part in the.

Preferably, the surface of the gear teeth contacting the guide rail is provided with an anti-slip structure to increase the friction force between the gear teeth and the guide rail.

Preferably, both tooth surfaces of the ratchet teeth are inclined to the clockwise direction; the pawl is towards one side of the positioning anti-falling wheel comprises a plurality of claws which are distributed along the rotating direction of the positioning anti-falling wheel and matched with the ratchet teeth, and two tooth surfaces of each claw incline towards the anticlockwise direction.

Preferably, it is a pair of that cloth is equallyd divide to the both sides that the wheel was prevented in the location has the pawl, and is a pair of the pawl each other is the mirror image, the both sides portion that the wheel was prevented in the location all protrudes and is formed with evenly distributed a plurality of ratchet teeth, just the both sides portion that the wheel was prevented in the location ratchet teeth each other is the mirror image, each on the pawl the quantity of claw with the lateral part that the wheel was prevented in the location the quantity of ratchet teeth is unanimous.

Preferably, the pawl is rotatably sleeved on the rotating wheel shaft, a swing rod is arranged on one side of the pawl, which is far away from the positioning anti-falling wheel, and a pawl anticlockwise limiting surface and a pawl clockwise limiting surface which are positioned in a rotating path of the swing rod and used for limiting the rotating amplitude of the swing rod are further arranged on the wall-attached guide seat.

Preferably, the wall-attached guide seat comprises a horizontal bearing plate and a pair of split structures, the split structures are rotatably connected with the horizontal bearing plate and can be opened and closed in a rotating mode, and when the split structures are closed in a rotating mode, the split structures and the horizontal bearing plate jointly enclose to form a semi-closed guide window for the guide rail to penetrate through and used for guiding the guide rail to crawl.

The climbing frame of the automatic ratchet wheel positioning and stress-cooperating centrifugal anti-falling guide seat has the following beneficial effects: the distance between the pawl and the ratchet teeth is maintained by providing pretightening force through the elastic pretightening device, and the distance between the pawl and the ratchet teeth can be changed by changing the pretightening state of the elastic pretightening device, so that the ascending and descending switching of the climbing frame is realized, when the climbing frame needs to ascend, the distance between the pawl and the ratchet teeth can be adjusted to be meshed with the pawl, at the moment, if the guide rail ascends to drive the positioning anti-falling wheel to rotate anticlockwise, the ratchet teeth and the pawl are collided during the rotation process, the pretightening force is overcome through the inclined plane mutual thrust force to pull the pawl to be opposite to the ratchet teeth so that the ratchet teeth rotate to pass, and if the guide rail descends to drive the positioning anti-falling wheel to rotate clockwise, the ratchet teeth and the pawl are meshed to prevent the ratchet teeth from rotating to pass; when the climbing frame needs to descend, the distance between the pawl and the ratchet wheel teeth can be adjusted to be separated, the ratchet wheel teeth can smoothly rotate clockwise, and the climbing frame can descend freely.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:

FIG. 1 is a schematic structural view of a climbing frame of an automatic ratchet positioning and force-bearing centrifugal anti-falling guide seat of the invention;

FIG. 2 is a schematic view of the installation location of the fall arrest device;

FIG. 3 is a schematic view of the fall arrest device;

FIG. 4 is a cross-sectional view of the fall arrest device;

FIG. 5 is a schematic view of the pawl engaging the ratchet teeth;

FIG. 6 is a schematic view of the pawl being opened;

FIG. 7 is a schematic view of the positioning of the fall arrest wheels;

FIG. 8 is a schematic structural diagram of the elastic pretensioning device;

FIG. 9 is a schematic view of the protective housing external to the fall arrest device;

FIG. 10 is another cross-sectional view of the fall arrest device.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Exemplary embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the embodiments and specific features in the embodiments of the present invention are described in detail in the present application, but not limited to the present application, and the features in the embodiments and specific features in the embodiments of the present invention may be combined with each other without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, the climbing frame of the automatic ratchet positioning and stress-cooperating centrifugal anti-falling guide seat of the embodiment of the invention comprises a guide rail 1 matched with a sliding sleeve, a plurality of wall-attached guide seats 2 and an anti-falling device 3 arranged on the wall-attached guide seats 2 and used for preventing the guide rail 1 from falling. A plurality of wall guide seat 2 that attach are fixed and are arranged along vertical direction straight line on the building surface, and the in-process that general guide rail 1 crawled can keep attaching wall guide seat 2 sliding sleeve cooperation more than two.

In this embodiment, the wall-attached guide base 2 includes a horizontal bearing plate 21 and a pair of split structures 22, the split structure 22 is approximately an L-shaped plate, the split structures 22 are rotatably connected with the horizontal bearing plate 21 and can be opened and closed in a rotating manner, when the split structures 22 are closed in a rotating manner, the split structures 22 and the horizontal bearing plate 21 enclose together to form a semi-closed guide window through which the guide rail 1 passes and used for guiding the guide rail 1 to crawl, and the guide rail 1 is limited in the semi-closed guide window and cannot be taken out.

Referring to fig. 2, the wall-attached guide seat 2 is further provided with a pair of mounting plates 23 for mounting the anti-falling device 3, the anti-falling device 3 and the pair of mounting plates 23 are located below the horizontal bearing plate 21, and the left and right mounting plates 23 are perpendicular to the horizontal bearing plate 21.

Referring to fig. 3-5, the anti-falling device 3 includes a positioning anti-falling wheel 31, an elastic pre-tightening device 35 and a pair of pawls 33 distributed on two sides of the positioning anti-falling wheel 31, two sides of the positioning anti-falling wheel 31 are respectively provided with a plurality of ratchet teeth 313 uniformly distributed, the positioning anti-falling wheel 31 and the pawls 33 are both rotatably mounted on the horizontal bearing plate 21 of the wall-attached guide seat 2, the elastic pre-tightening device 35 provides a pre-tightening force along the axial direction of the positioning anti-falling wheel 31 for maintaining the distance between the pawls 33 and the ratchet teeth 313, the pre-tightening force enables the distance between the pawls 33 and the ratchet teeth 313 to be maintained in a state that the pawls 33 are engaged with the ratchet teeth 313, and the state of the elastic pre-tightening device 35 at this time is defined as a. Concretely, anti-falling device 3 still includes runner axle 32, and runner axle 32 passes a pair of mounting panel 23, the wheel 31 is prevented weighing down in the location and pawl 33 all overlaps on runner axle 32, a pair of mounting panel 23 is located the both sides that the wheel 31 was prevented weighing down in the location, a pair of pawl 33 is located respectively the outside of a pair of mounting panel 23, elasticity preloading device 35 is including assembling in runner axle 32 and both ends respectively with the extension spring 351 that a pair of pawl 33 is connected.

Wherein, the ratchet teeth 313 are formed by protruding from the side of the positioning anti-falling wheel 31, more specifically, the positioning anti-falling wheel 31 comprises a cylindrical part 311 and a plurality of gear teeth 312 radially protruding from the circumferential wall of the cylindrical part 311 and used for being engaged with the guide rail 1, referring to fig. 1, a row of positioning parts 11 are arranged on the guide rail 1 along the length direction thereof, the gear teeth 312 are engaged with the positioning parts 11, and during the ascending process of the guide rail 1, the gear teeth 312 are matched with the positioning parts 11 in a manner similar to the engagement of a gear and a chain. Preferably, the surface of the gear teeth 312 contacting the guide rail 1 is provided with a slip prevention structure 3121 to promote friction with the guide rail 1. The cylindrical part 311 is sleeved outside the rotating wheel shaft 32, the mounting plate 23 is provided with an annular cavity for mounting the cylindrical part 311, and the end part of the cylindrical part 311 extending out of the annular cavity is protruded to form the ratchet teeth 313.

The ratchet teeth 313 on two sides of the positioning anti-falling wheel 31 are mirror images, the pair of pawls 33 are mirror images, two tooth surfaces of the ratchet teeth 313 incline towards the clockwise direction, one side of the pawl 33 facing the positioning anti-falling wheel 31 comprises a plurality of pawls distributed along the rotating direction of the positioning anti-falling wheel 31 and matched with the ratchet teeth 313, the two tooth surfaces of the pawls incline towards the counterclockwise direction, and the number of the pawls on each pawl 33 is consistent with that of the ratchet teeth 313 on one side of the positioning anti-falling wheel 31.

The side of the pawl 33 departing from the positioning anti-falling wheel 31 is provided with a swing rod 34 extending in parallel with the radial direction of the positioning anti-falling wheel, the swing rod 34 is also sleeved outside the rotating wheel shaft 32, the swing rod 34 can rotate along with the pawl 33, and the swing rod 34 and the pawl 33 are integrally formed in the embodiment. The mounting plate 23 of the wall-attached guide seat 2 is further provided with a pawl counterclockwise limiting surface 231 and a pawl clockwise limiting surface 232 which are positioned in the rotation path of the swing rod 34, when the swing rod 34 rotates counterclockwise, the swing rod stops counterclockwise rotation only when rotating to be in contact with the pawl counterclockwise limiting surface 231, and when the swing rod 34 rotates clockwise, the swing rod stops clockwise rotation only when rotating to be in contact with the pawl clockwise limiting surface 232.

Preferably, the wall-attached guide seat 2 is further provided with a pawl spring 4 for providing an acting force for blocking the rotation of the pawl 33 when the pawl rotates clockwise, specifically, the mounting plate 23 is provided with a spring fixing block for mounting the pawl spring 4, one end of the pawl spring 4 is fixed on the spring fixing block, the other end of the pawl spring 4 abuts against the swing rod 34, the pawl spring 4 pushes the swing rod 34 to abut against the counterclockwise limit surface 231 of the pawl, when the swing rod 34 rotates clockwise along with the pawl 33, the pawl spring 4 is pressed and increases the acting force for blocking the rotation of the swing rod 34, and if the pawl spring 4 cannot completely prevent the swing rod 34 from continuing to rotate clockwise, the clockwise limit surface 232 of the pawl can help to limit the amplitude of the clockwise rotation of the swing rod 34.

In this embodiment, in the process that the positioning anti-falling wheel 31 rotates counterclockwise due to the rising of the guide rail 1, when the ratchet teeth 313 and the pawls 33 collide, the pair of pawls 33 are pulled away from each other by the mutual thrust of the inclined surfaces and overcoming the pre-tightening force, so that the ratchet teeth 313 rotate and pass through, and thus the guide rail 1 can smoothly rise, as shown in fig. 6; during the clockwise rotation of the positioning anti-falling wheel 31 caused by the descending of the guide rail 1, the ratchet teeth 313 and the pawls 33 are engaged to prevent the ratchet teeth 313 from rotating to pass, and after the ratchet teeth 313 and the pawls 33 are engaged, the ratchet teeth 313 and the pawls 33 rotate together clockwise, and part or all of the pawl springs 4 in the plurality of wall-attached guide seats 2 provide acting force to enable the corresponding positioning anti-falling wheel 31 to support the guide rail 1 in an up-and-down cooperative stress mode, for example: when the guide rail 1 descends, because the installation height of each wall-attached guide seat 2 cannot guarantee that all the positioning anti-falling wheels 31 can be in contact with the guide rail 1 at the same time, only one positioning anti-falling wheel 31 can be contacted with the guide rail 1 firstly, at the moment, the positioning anti-falling wheels 31 can be driven by the guide rail 1 to rotate clockwise, the pawls 33 and the ratchet teeth 313 are meshed and rotate clockwise together, the pawls 33 rotate clockwise to drive the swing rod 34 to rotate clockwise, the swing rod 34 rotates clockwise to press the pawl springs 4, the pawl springs 4 are pressed to provide acting force (namely spring force) for preventing the swing rod 34 from rotating clockwise continuously, along with the continuous descending of the guide rail 1, the more contacted positioning anti-falling wheels 31 are, and finally, the pawl springs 4 of the plurality of positioning anti-falling wheels 31 are used for supporting the guide rail.

It will be appreciated that in other embodiments, if the upper and lower cooperating forces are not required, the pawl spring 4 may be omitted, the rotation of the pawl 33 is limited to the magnitude between the counterclockwise position-limiting surface 231 and the clockwise position-limiting surface 232 of the pawl, and even the pawl 33 may be directly limited to be unable to rotate (for example, the counterclockwise position-limiting surface 231 and the clockwise position-limiting surface 232 of the pawl just clamp the swing link 34), and only move in the axial direction of the positioning falling preventive wheel 31.

Referring to fig. 7, the elastic pretensioning device 35 of the present invention further includes a knob 352, two ends of the tension spring 351 are further connected to the pawls 33 through positioning pins 36, respectively, and the knob 352 is connected to the positioning pins 36. It can be understood that the tension spring 351 may be directly connected to the pawl 33, or indirectly connected to the pawl 33 by being connected to the swing link 34, that is, the tension spring 351 is connected to the swing link 34 by using the positioning pin 36, and referring to fig. 8, the pin 36 simultaneously passes through the spiral hole at the end of the tension spring 351, the knob 352, the rotating wheel shaft 32 and the swing link 34. The knob 352 rotates to drive the pin 36 to rotate, and the swing link 34 is provided with an arc-shaped slot 341 for the pin 36 to rotate.

The tension spring 351 is assembled in the rotating wheel shaft 32, the knob 352 is movably sleeved in the end part of the rotating wheel shaft 32 and connected with the end part of the tension spring 351, the rotating wheel shaft 32 is provided with a U-shaped positioning groove 321 with a first positioning position and a second positioning position, the distance between the first positioning position and the center of the rotating wheel shaft is smaller than the distance between the second positioning position and the center of the rotating wheel shaft, two closed ends of the U-shaped positioning groove 321 are used as the two positioning positions, and the positioning pin 36 penetrates through the positioning groove 321. When the positioning pin 36 is located at the first positioning position of the positioning slot 321, the elastic pre-tightening device 35 is in the first pre-tightening state, and when the knob 352 is located at the second positioning position of the positioning slot 321, the elastic pre-tightening device 35 is in the second pre-tightening state, at this time, the distance between the pair of pawls 33 and the ratchet teeth 313 enables the pawls 33 to disengage from the ratchet teeth 313, and the ratchet teeth 313 can rotate clockwise smoothly. The knob 352 is operated to switch the positioning pin 36 between the first positioning position and the second positioning position, for example, if the positioning pin 36 is located at the first positioning position of the positioning slot 321, where the guide rail 1 cannot descend, the knob 352 can be rotated, and then the knob 352 is pulled and rotated reversely, so that the positioning pin 36 can be switched to the second positioning position.

Thus, when the guide needs to be raised, the resilient pretensioning means 35 can be adjusted to the first pretension state by rotating the knob 352; when the guide rail needs to be lowered, the elastic pretensioning device 35 can be adjusted to the second pretensioning state by rotating the knob 352.

It can be understood that, although in the present embodiment, one pawl 33 is distributed on both sides of the positioning fall-preventing wheel 31, and both sides of the positioning fall-preventing wheel 31 are also provided with the ratchet teeth 313 in a protruding manner, in other embodiments, the pawl 33 can be distributed on only one side of the positioning fall-preventing wheel 31, and the ratchet teeth 313 are arranged on only one side of the positioning fall-preventing wheel 31 in a protruding manner, in which case one end of the tension spring 351 is fixed and immovable instead.

Preferably, referring to fig. 9, in this embodiment, each mounting plate 23 is further provided with a protective shell 5, the anti-falling device 3 is arranged in the protective shell 5, the knob 352 is arranged outside the protective shell 5, a through hole 51 is formed in the protective shell 5, the knob 352 comprises a cylindrical rotating body and a T-shaped handle, the cylindrical rotating body is movably sleeved in the end portion of the rotating wheel shaft 32, and the T-shaped handle extends out of the protective shell 5 from the through hole 51.

Further preferably, the invention also takes into account the case of a fall arrest failure of the pawl 33 and the positioning fall arrest wheel 31 (including a manually set failure to pull the pawl 33 apart as the guide rail 1 descends, and also including a failure caused by problems with the pawl 33 and the positioning fall arrest wheel 31 themselves), providing a fall arrest function for such a case. Referring to fig. 6-10, fig. 10 is a cutaway view of one of the mounting plates 23. Set up on the inner wall of the annular chamber of mounting panel 23 and detain position 233, just it is located to detain position 233 the top at the axle center place horizontal plane of wheel 31 is prevented in the location, being located of cylindricality portion 311 the mounting groove has been seted up along radial direction to the part in the cavity, each centrifugal slider 314 of installation in the mounting groove when wheel 31 is prevented in the location clockwise overspeed rotation, centrifugal slider 314 follows under the centrifugal force effect the radial direction roll-off of wheel 31 is prevented in the location, when centrifugal slider 314 roll-off to with when detaining the position cooperation the wheel 31 stall is prevented and supports in the location guide rail 1. For example, in this embodiment, the fastening position 233 is specifically a step, a hook structure 3141 is formed by protruding a side edge of the centrifugal slider 314, if the pawl 33 and the positioning anti-falling wheel 31 fail to prevent falling (for example, the tension spring 351 fails), the guide rail 1 will drop rapidly, the positioning anti-falling wheel 31 rotates clockwise and overspeed, the centrifugal slider 314 slides out, the positioning anti-falling wheel 31 cannot rotate clockwise after the hook structure 3141 is fastened to the fastening position 233, and the guide rail 1 stops dropping.

In this embodiment, the catching position 233 is a position deviated from one side of the guide rail 1 by a preset distance from the position right above the axis of the positioning anti-falling wheel 31, and the deviated preset distance mainly ensures that the centrifugal slider 314 corresponding to the gear teeth 312 rotating right above the axis of the positioning anti-falling wheel 31 slides out and then collides and is clamped with the catching position 233 when the positioning anti-falling wheel 31 rotates fast, so that the positioning anti-falling wheel 31 does not rotate any more, and the gear teeth 312 are almost synchronously matched and positioned with the positioning part 11 of the guide rail 1, thereby preventing the guide rail 1 from descending.

It can be understood that the catching unit 233 is not limited to the structure and position of the present embodiment, as long as it is disposed above the horizontal plane where the axis of the positioning falling-prevention wheel 31 is located, and does not affect the rotation of the positioning falling-prevention wheel 31 in the normal state, and the rotation of the centrifugal slider 314 is limited by colliding and being blocked with the centrifugal slider 314 when the centrifugal slider 314 slides out due to the centrifugal force.

The working principle of the embodiment is as follows:

if the creeper is to be climbed, the positioning pin 36 is rotated by the knob 352 to be located at a first positioning position of the positioning slot 321, as shown in fig. 7. In the crawling process of the guide rail 1, the guide rail 1 rises to drive the positioning anti-falling wheel 31 to rotate anticlockwise, and when the ratchet teeth 313 and the pawls 33 collide in the rotating process, the ratchet teeth 313 and the pawls 33 overcome the pre-tightening force of the tension spring 351 through the mutual thrust of the inclined surfaces, so that the pair of pawls 33 are mutually pulled apart, and the ratchet teeth 313 can rotate and pass through. If the guide rail 1 stops ascending or descends due to other reasons, the positioning anti-falling wheel 31 is driven to rotate clockwise, the ratchet teeth 313 and the pawls 33 are engaged when colliding, the pawls 33 can only rotate within a small range, so that the ratchet teeth 313 can be prevented from continuously rotating, the guide rail 1 is braked, and the guide rail 1 is prevented from descending, specifically, in the embodiment, the positioning anti-falling wheel 31 which is firstly contacted with the guide rail 1 is driven to rotate clockwise by the guide rail 1, the pawls 33 and the ratchet teeth 313 are engaged and rotate clockwise, the pawls 33 rotate clockwise to drive the swing rod 34 to rotate clockwise, the swing rod 34 rotates clockwise to press the pawl spring 4, the pawl spring 4 is pressed to provide acting force (namely spring force) for preventing the swing rod 34 from continuing to rotate clockwise, and the spring force of the pressed pawl spring 4 is smaller than the weight of the guide rail 1 and the climbing frame, as the guide rail 1 continues to descend, the more positioning and anti-falling wheels 31 are contacted, and finally the guide rail 1 is supported by the pawl springs 4 of the plurality of positioning and anti-falling wheels 31 in an up-and-down coordinated stress mode. Of course, when the first positioning anti-falling wheel 31 contacted by the guide rail 1 is pressed to the clockwise limit (i.e. the swing rod 34 is contacted with the pawl clockwise limit surface 232), the position of the swing rod 34 of the second positioning anti-falling wheel 31 can not be contacted with the pawl clockwise limit surface 232, and because the pawl clockwise limit surface 232 is contacted with the swing rod 34, the positioning anti-falling wheel 31 also has a counterclockwise rotating force to support the guide rail 1.

If the creeper is going to descend, the knob 352 is rotated to pull out and rotate reversely, so that the positioning pin 36 is located at the second positioning position of the positioning slot 321, for example, the pin 36 in fig. 7 is moved to the other end of the positioning slot 321 along the U-shaped positioning slot 321, at this time, the ratchet teeth 313 and the pawls 33 are completely disengaged, the pawls 33 do not influence the clockwise rotation of the ratchet teeth 313, and therefore the guide rail 1 can descend freely.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A climbing frame of an automatic ratchet wheel positioning and stress-cooperating centrifugal anti-falling guide seat comprises a guide rail matched with a sliding sleeve, a plurality of wall-attached guide seats and an anti-falling device which is arranged on the wall-attached guide seats and used for preventing the guide rail from falling, it is characterized in that the anti-falling device comprises a positioning anti-falling wheel, an elastic pre-tightening device which can be adjusted to a first pre-tightening state or a second pre-tightening state, and a pawl positioned at the side part of the positioning anti-falling wheel, the side part of the positioning anti-falling wheel is provided with ratchet teeth, the elastic pre-tightening device is used for providing pre-tightening force which is used for maintaining the distance between the pawl and the ratchet teeth along the axial direction of the positioning anti-falling wheel, the distance of the pawl relative to the ratchet wheel teeth when the elastic pretensioning device is in the first pretensioning state enables the ratchet wheel teeth and the pawl to be engaged, when the elastic pre-tightening device is in a second pre-tightening state, the distance between the pawl and the ratchet wheel teeth enables the pawl to be disengaged from the ratchet wheel teeth;

2. The automatic ratchet wheel positioning and stress-cooperating centrifugal falling-preventing guide frame according to claim 1, wherein the elastic pre-tightening device comprises a tension spring and a knob, two ends of the tension spring are further connected with the pawl through positioning pins respectively, the knob is connected with the positioning pins, the positioning falling-preventing wheel is sleeved on a rotating wheel shaft, the tension spring is assembled in the rotating wheel shaft, the knob is movably sleeved in the end part of the rotating wheel shaft and is connected with the end part of the tension spring, the pawl is sleeved outside the rotating wheel shaft, a positioning groove with a first positioning position and a second positioning position is formed in the rotating wheel shaft, the distance from the first positioning position to the center of the rotating wheel shaft is smaller than the distance from the second positioning position to the center of the rotating wheel shaft, the positioning pin penetrates through the positioning groove, and when the positioning pin is located at the first positioning position, the elastic pre-tightening device is in the first pre-tightening state, when the positioning pin is located at the second positioning position, the elastic pre-tightening device is in the second pre-tightening state, and the knob is operated to drive the positioning pin to switch between the first positioning position and the second positioning position.

3. The automatic ratchet wheel positioning and stress-cooperating centrifugal falling-preventing guide frame according to claim 1, wherein a centrifugal slider capable of sliding along the radial direction of the positioning falling-preventing wheel is arranged in the positioning falling-preventing wheel, the wall-attached guide frame is provided with a buckling position, when the positioning falling-preventing wheel rotates clockwise and excessively, the centrifugal slider slides out along the radial direction of the positioning falling-preventing wheel under the action of centrifugal force, and when the centrifugal slider slides out to be matched with the buckling position, the positioning falling-preventing wheel stops rotating and butts against the guide rail.

4. The automatic ratchet wheel positioning and stress-cooperating centrifugal fall-preventing guide bracket climbing frame as claimed in claim 3, it is characterized in that the wall-attached guide seat is provided with a pair of mounting plates for mounting the anti-falling device, the mounting plates are positioned at two sides of the positioning anti-falling wheel, the pair of pawls are respectively positioned at the outer sides of the pair of mounting plates, the positioning anti-falling wheel comprises a cylindrical part and gear teeth which protrude from the peripheral wall of the cylindrical part along the radial direction, the cylindrical part is sleeved on the rotating wheel shaft, the mounting plate is provided with a cavity for mounting the cylindrical part, the buckling position is arranged on the inner wall of the cavity and is positioned above the horizontal plane where the axis of the positioning anti-falling wheel is positioned, the end part of the cylindrical part extending out of the cavity protrudes to form the ratchet teeth, mounting grooves are formed in the part, located in the cavity, of the cylindrical part along the radial direction, and one centrifugal slider is mounted in each mounting groove.

5. The automatic ratchet wheel positioning and stress centrifugal fall prevention guide frame according to claim 4, wherein the surface of the gear teeth contacting the guide rail is provided with an anti-slip structure for lifting the friction force between the gear teeth and the guide rail.

6. The creeper of the automatic ratchet positioning coordinated stressed centrifugal anti-falling guide seat as claimed in claim 1, wherein two tooth surfaces of the ratchet teeth are inclined to the clockwise direction; the pawl is towards one side of the positioning anti-falling wheel comprises a plurality of claws which are distributed along the rotating direction of the positioning anti-falling wheel and matched with the ratchet teeth, and two tooth surfaces of each claw incline towards the anticlockwise direction.

7. The automatic ratchet positioning is in coordination with centrifugal fall-proof guide's climbing frame of atress of claim 6, its characterized in that, it has a pair of to distribute equally to the both sides of wheel is prevented in the location the pawl, it is a pair of the pawl each other is the mirror image, the both sides portion that the wheel was prevented in the location all protrudes and is formed with a plurality of evenly distributed ratchet teeth, just the both sides portion that the wheel was prevented in the location the ratchet teeth are each other the mirror image, each on the pawl the quantity of claw with the lateral part that the wheel was prevented in the location the quantity of ratchet teeth is unanimous.

8. The climbing frame of the automatic ratchet positioning and stress-cooperating centrifugal anti-falling guide seat according to claim 1, wherein the pawl is rotatably sleeved on the rotating wheel shaft, a swing rod is arranged on one side of the pawl, which is away from the positioning anti-falling wheel, and a pawl counterclockwise limiting surface and a pawl clockwise limiting surface which are positioned in a rotation path of the swing rod and used for limiting the rotation amplitude of the swing rod are further arranged on the wall-attached guide seat.

9. The automatic ratchet wheel positioning and stress-cooperating centrifugal fall-preventing guide frame of claim 1, wherein the wall-attached guide frame comprises a horizontal bearing plate and a pair of split structures, the split structures are rotatably connected with the horizontal bearing plate and can be opened and closed in a rotating mode, and when the split structures are closed in a rotating mode, the split structures and the horizontal bearing plate jointly enclose to form a semi-closed guide window for the guide rail to penetrate through and for guiding the guide rail to climb.