CN213059760U

CN213059760U - Progressive elevator safety tongs

Info

Publication number: CN213059760U
Application number: CN202020909550.6U
Authority: CN
Inventors: 徐东升; 邹智; 曾庆埔; 尹德文; 张冲
Original assignee: SHANGHAI LIFTECH ELEVATOR ACCESSORIES CO Ltd
Current assignee: SHANGHAI LIFTECH ELEVATOR ACCESSORIES CO Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-04-27
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses a progressive elevator safety tongs, which belongs to the field of elevator accessories and comprises a support frame, a support plate positioned at the inner side of the support frame, a U-shaped plate spring positioned above the support plate corresponding to the inner part of the support frame, guide blocks symmetrically arranged at the inner side of the U-shaped plate spring, positioning pins for fixing the U-shaped plate spring and the guide blocks on the support frame and a limiting block for limiting the movement of the U-shaped plate spring; the positioning pin sequentially penetrates through the support frame and the U-shaped plate spring and is fixedly connected with the guide rail, a first through hole and a second through hole for the positioning pin to penetrate through are respectively formed in the positions, corresponding to the positioning pin, of the support frame and the U-shaped plate spring, and the diameters of the first through hole and the second through hole are at least larger than the diameter of the positioning pin; the support frame is provided with a jaw; at least two positioning pins are arranged between the guide rail and the support frame. The elevator safety tongs are simple and stable in structure, capable of effectively keeping the stability of the installation position of the plate spring, capable of reducing the risk of deformation of the positioning pin and safe to use.

Description

Progressive elevator safety tongs

Technical Field

The utility model belongs to the technical field of progressive elevator safety tongs, concretely relates to progressive elevator safety tongs.

Background

The safety tongs are a safety protection device of an elevator, and the safety tongs stop the air intake of a car and clamp the car on a guide rail under the operation of a speed limiter when the elevator exceeds the set limit speed of the speed limiter of the elevator or in the case of breakage and looseness of a suspension rope. It provides effective protection for the safe operation of the elevator.

As shown in fig. 4 and 5, the conventional progressive elevator safety gear comprises a support frame 1 ', a support plate 2 ' located inside the support frame 1 ', a U-shaped plate spring 3 ' located inside the support frame 1 ' and above the corresponding support plate 2 ', guide blocks 6 ' symmetrically installed inside the U-shaped plate spring 3 ', and a wedge block 8 ' slidably installed at one side of the guide block 6 ' far from the U-shaped plate spring 3 '; the two wedges 8 'move towards or away from each other on the two guide blocks 6' correspondingly to clamp or release the elevator guide rails to realize stopping.

The guide blocks 6 ' are generally connected through a single positioning pin 4 ', and a limiting plate 5 ' for limiting the U-shaped plate spring 3 ' to move upwards is fixed on the inner top surface of the support frame 1 ';

however, when the elevator is decelerated or stopped, the wedge block moves and is clamped on the car guide rail, instantaneous stress impacts to a large extent to cause the U-shaped plate spring to rotate due to inertia, and meanwhile, the impact can be caused to the positioning pin to cause deformation and damage of the positioning pin, so that the U-shaped plate spring is moved upwards or downwards, the installation position of the U-shaped plate spring is changed, the clamping force output by the plate spring is changed easily, and the use safety is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a progressive elevator safety tongs to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a progressive elevator safety gear comprises a support frame, a support plate positioned on the inner side of the support frame, a U-shaped plate spring positioned in the support frame and corresponding to the upper part of the support plate, guide blocks symmetrically installed on the inner side of the U-shaped plate spring, positioning pins used for fixing the U-shaped plate spring and the guide blocks on the support frame, and a limiting block used for limiting the U-shaped plate spring to move; the positioning pin sequentially penetrates through the supporting frame and the U-shaped plate spring and is fixedly connected with the guide block, a first through hole and a second through hole for the penetration of the positioning pin are respectively formed in the positions, corresponding to the positioning pin, of the supporting frame and the U-shaped plate spring, and the diameters of the first through hole and the second through hole are at least larger than the diameter of the positioning pin; a jaw is arranged on the supporting frame, wedge blocks are slidably mounted on one sides of the guide blocks, which are far away from the U-shaped plate spring, and the two wedge blocks move on the two guide blocks correspondingly to be close to or far away from each other; at least two positioning pins are arranged between the guide block and the support frame;

u type leaf spring is close to the one end of backup pad with U type leaf spring is close to the equal at least fixed mounting in one end at support frame top has one to be used for the restriction the limiting plate that U type leaf spring reciprocated.

Preferably, in the progressive elevator safety gear, one end of the wedge block close to the jaw is fixedly provided with a limiting bolt.

Preferably, in the progressive elevator safety gear, a guide plate for guiding the movement of the wedge is fixedly mounted on the guide block.

Preferably, in the progressive elevator safety gear, the guide plate is provided with a first fixing bolt for fixedly connecting the guide plate and the guide block.

Preferably, as a progressive elevator safety gear, a roller plate is arranged between the wedge block and the guide block, and two surfaces of the roller plate are respectively contacted with the guide block and the wedge block.

Preferably, the limiting plate is provided with a second fixing bolt for fixing the limiting plate to the top of the support frame and the support plate correspondingly.

This progressive elevator safety tongs sets up two locating pins at least and fixes the both ends of U type leaf spring on the support frame, can avoid U type leaf spring rotatory aversion effectively, set up the limiting plate through the position department that corresponds U type leaf spring at backup pad and support frame simultaneously, fix between U type leaf spring and support frame and the backup pad effectively, restriction U type leaf spring removes, because the too big locating pin that leads to of impact force takes place to warp and leads to U type leaf spring to take place displacement from top to bottom when avoiding elevator system to stop, the stability of U type leaf spring has been guaranteed effectively, and then avoid causing the guide rail to warp and set up the risk that the voussoir breaks away from the guide rail, safety.

Drawings

Fig. 1 is a schematic view of a progressive elevator safety gear;

fig. 2 is a schematic diagram of a rear view of a progressive elevator safety gear;

FIG. 3 is a schematic sectional view taken along line A-A in FIG. 2;

fig. 4 is a schematic front view of a conventional progressive elevator safety gear;

fig. 5 is a rear view of a conventional progressive elevator safety gear.

Detailed Description

The present invention will be further described with reference to the following examples.

The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. The condition in the embodiment can be further adjusted according to concrete condition the utility model discloses a it is right under the design prerequisite the utility model discloses a simple improvement of method all belongs to the utility model discloses the scope of claiming.

As shown in fig. 1, fig. 2 and fig. 3, the utility model provides a progressive elevator safety gear, which comprises a support frame 1, a support plate 2 located inside the support frame 1, a U-shaped plate spring 3 located inside the support frame 1 and above the support plate 2, a guide block 6 symmetrically installed inside the U-shaped plate spring 3, a positioning pin 4 for fixing the U-shaped plate spring 3 and the guide block 6 on the support frame 1, and a limiting block 5 for limiting the movement of the U-shaped plate spring 3; the positioning pin 4 sequentially penetrates through the support frame 1 and the U-shaped plate spring 3 and is fixedly connected with the guide block 6, a first through hole 11 and a second through hole 12 for the positioning pin 4 to penetrate through are respectively formed in the positions, corresponding to the positioning pin 4, of the support frame 1 and the U-shaped plate spring 3, and the diameters of the first through hole 11 and the second through hole 12 are at least larger than the diameter of the positioning pin 4; a jaw 13 is arranged on the support frame 1, a wedge block 8 is slidably mounted on one side of the guide block 6, which is far away from the U-shaped plate spring 3, and the two wedge blocks 8 move on the two guide blocks 6 correspondingly to be close to or far away from each other; at least two positioning pins 4 are arranged between the guide block 6 and the support frame 1;

one end of the U-shaped plate spring 3 close to the supporting plate 2 and one end of the U-shaped plate spring 3 close to the top of the supporting frame 1 are at least fixedly provided with a limiting plate 5 used for limiting the U-shaped plate spring 3 to move up and down.

Different from the prior art, this elevator safety tongs is fixed U type leaf spring 3 and support frame 1's lateral wall through two at least locating pins 4, make U type leaf spring 3 can not rotate on support frame 1, thereby avoid the too big U type leaf spring 3 that leads to of impact force to take place to rotate the aversion and lead to voussoir 8 to rotate and break away from car guide, the position that corresponds U type leaf spring 3 through the inside top that corresponds U type leaf spring 3 at backup pad 2 simultaneously all sets up a limiting plate 5 at least, it is tight with U type leaf spring 3 to press from both sides through limiting plate 5, thereby the too big locating pin 4 that leads to of impact force takes place to deform and lead to U type leaf spring 3 to take place to reciprocate when avoiding the system to stop, and then make U.

In order to ensure the stability of the moving position of the wedge 8, as shown in fig. 1, a limit bolt 9 is fixedly installed at one end of the wedge 8 close to the jaw 13.

Through set up spacing bolt 9 on voussoir 8, when 8 moves up and make spacing bolt 9 and the contact of support frame 1 top bottom surface at voussoir for 8 stop to remove of voussoir, avoid voussoir 8 to break away from guide rail 6, make voussoir 8 remain stable.

In order to ensure the running stability of the wedge 8, as shown in fig. 1 and 2, a guide plate 7 for movably guiding the wedge 8 is fixedly installed on the guide block 6.

The wedge 8 is limited by the guide plate 7, so that the wedge 8 moves along the side surface of the guide block 6, the wedge 8 is prevented from being deviated, and the wedge 8 is kept stable.

In order to stably mount the guide plate 7 on the guide block 6, a first fixing bolt 10 for fixedly connecting the guide plate 7 and the guide block 6 is provided on the guide plate 7.

In order to reduce the frictional force between the wedge 8 and the guide block 6, a needle plate is provided between the wedge 8 and the guide block 6, and both surfaces of the needle plate are in contact with the guide block 6 and the wedge 8, respectively (not shown).

When the wedge block 8 moves, the needle plate moves along with the wedge block, the needle roller on the needle plate makes circular motion relative to the wedge block 8 and the guide rail 5, and the straight sliding motion is changed into rolling through the needle plate, so that the friction force between the wedge block 8 and the guide block 6 is effectively reduced, and the wedge block 8 can move more conveniently.

Wherein, the limiting plate 5 is provided with a second fixing bolt 14 for correspondingly fixing the limiting plate 5 on the top of the support frame 1 and the support plate 2.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A progressive elevator safety gear comprises a support frame (1), a support plate (2) positioned on the inner side of the support frame (1), a U-shaped plate spring (3) positioned in the support frame (1) and corresponding to the upper part of the support plate (2), guide blocks (6) symmetrically installed on the inner side of the U-shaped plate spring (3), a positioning pin (4) used for fixing the U-shaped plate spring (3) and the guide blocks (6) on the support frame (1), and a limiting plate (5) used for limiting the U-shaped plate spring (3) to move; the positioning pin (4) sequentially penetrates through the support frame (1) and the U-shaped plate spring (3) and is fixedly connected with the guide block (6), a first through hole (11) and a second through hole (12) for the positioning pin (4) to penetrate through are respectively formed in positions, corresponding to the positioning pin (4), of the support frame (1) and the U-shaped plate spring (3), and the diameters of the first through hole (11) and the second through hole (12) are at least larger than that of the positioning pin (4); a jaw (13) is arranged on the support frame (1), wedges (8) are slidably mounted on one side, away from the U-shaped plate spring (3), of the guide block (6), and the two wedges (8) move on the two guide blocks (6) correspondingly to be close to or away from each other; the method is characterized in that: at least two positioning pins (4) are arranged between the guide block (6) and the support frame (1);

u type leaf spring (3) are close to the one end of backup pad (2) with U type leaf spring (3) are close to the equal at least fixed mounting of one end at support frame (1) top has one to be used for restricting limiting plate (5) that U type leaf spring (3) reciprocated.

2. The progressive elevator safety gear of claim 1, wherein: and a limiting bolt (9) is fixedly arranged at one end of the wedge block (8) close to the jaw (13).

3. The progressive elevator safety gear of claim 1, wherein: and a guide plate (7) for movably guiding the wedge block (8) is fixedly arranged on the guide block (6).

4. The progressive elevator safety gear of claim 3, wherein: the guide plate (7) is provided with a first fixing bolt (10) for fixedly connecting the guide plate (7) with the guide block (6).

5. The progressive elevator safety gear of claim 3, wherein: a needle roller plate is arranged between the wedge block (8) and the guide block (6), and two surfaces of the needle roller plate are respectively contacted with the guide block (6) and the wedge block (8).

6. The progressive elevator safety gear of claim 1, wherein: the limiting plate (5) is provided with a second fixing bolt (14) used for correspondingly fixing the limiting plate (5) to the top of the support frame (1) and the support plate (2).