WO2022178845A1

WO2022178845A1 - Wedge wear self-compensation structure for safety protection apparatus

Info

Publication number: WO2022178845A1
Application number: PCT/CN2021/078202
Authority: WO
Inventors: 邹家春; 姚荣康; 刘坤; 张田生; 陈明星; 戴永强
Original assignee: 杭州沪宁电梯部件股份有限公司
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2022-09-01

Abstract

A wedge wear self-compensation structure for a safety protection apparatus. The safety protection apparatus comprises a base and a movable wedge movably fitting the base; the wedge wear self-compensation structure comprises a compensation block (5), the compensation block (5) is located in the moving direction of the movable wedge, and the compensation block (5) is movably arranged between the base and the movable wedge to move close to or away from a mating plate; and when the movable wedge is lifted to a target location, the wedge is linked with the compensation block (5), so as to be in frictional contact with the mating plate. By means of the arrangement, regarding the defect of braking force reduction caused by wear between the movable wedge and the mating plate, the wedge wear self-compensation structure for a safety protection apparatus obtains a larger friction force by using contact friction compensation and having a static small contact surface between the compensation block and the mating plate, thereby improving the braking safety of the safety protection apparatus, and achieving effective safety protection under various working conditions.

Description

A self-compensating structure of wedge block wear for safety protection device

technical field

The invention belongs to the technical field of elevator safety protection, in particular to a wedge wear self-compensating structure for a safety protection device.

Background technique

When the elevator abnormally overspeeds or falls, in order to protect the safety of passengers in the car as much as possible, a safety protection device must be provided on the elevator car.

In the existing braking device using wedge friction braking, to obtain a certain braking force, the vertical stroke of the limiting wedge is used to control the compression amount of the elastic element to obtain different positive pressures. The positive pressure is set when the factory debugging meets a certain P+Q weight and guide rail structure size and state. However, with the wear of the wedge blocks and the counterparts (such as elevator guide rails) in the braking process, the distance between the wedge blocks will increase, so that the positive pressure of the elastic element will decrease accordingly, resulting in the braking life of the braking device. and reliability there is a certain risk. In order to solve the wear problem in the braking process, it is necessary to adjust the limit amount through wear detection, so that the limit position after wear is changed accordingly to control the positive pressure of the elastic element.

In addition, the static or low speed braking problem of the existing wedges under full load and light load is also unstable. During light-load static braking, the positive pressure is relatively small. Due to the unstable friction of the large-area wedge block, relative slippage occurs when braking different dual parts, which makes the static braking ineffective.

SUMMARY OF THE INVENTION

Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objectives of the present invention is to at least solve one or more of the above-mentioned problems existing in the prior art. In other words, one of the objectives of the present invention is to provide one of the aforementioned requirements A safety protection device with a self-compensating structure for wedge wear.

In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

A wedge wear self-compensation structure for a safety protection device, the safety protection device includes a base and a movable wedge movably matched with the base, the wedge wear self-compensation structure includes a compensation block, and the compensation block is located in the movable wedge. In the direction of movement, the compensation block is movably arranged between the base and the movable wedge to be close to or away from the counterpart; when the movable wedge is pulled to the target position, the movable wedge moves with the compensation block until it contacts and rubs against the counterpart. At the moment of triggering the braking, the movable wedge pushes the compensation block to guide the contact pair (such as the guide rail), and as the compensation block wears, the movable wedge moves upward to achieve wear compensation; during static braking, it first contacts the compensation block of the guide rail, Since the compensation block and the counterpart have a small contact area, a relatively large friction coefficient can be obtained, thereby achieving stable braking under static conditions.

As a preferred solution, the base has a guide structure for guiding the compensating block toward or away from the counterpart.

As a preferred solution, the guiding structure is an inclined surface or a curved surface or is provided with rolling elements. Wherein, arranging rolling elements in the guide structure can reduce friction.

As a preferred solution, a sliding positioning structure is provided between the base and the movable wedge corresponding to the compensating block, so that the compensating block moves in a direction perpendicular to the braking surface of the counterpart under the action of the movable wedge and contacts the counterpart.

As a preferred solution, the compensation block is also limited by a wedge cover plate mounted on the base; wherein, the wedge cover plate and the sliding positioning structure are located on two sides of the compensation block, respectively.

As a preferred solution, the sliding positioning structure includes a chute located on the base and a positioning piece mounted on the compensation block, the positioning piece extends into the chute, and the positioning piece is slidably fitted to the chute;

Alternatively, the sliding positioning structure includes a positioning piece mounted on the base and a chute located on the compensation block, the positioning piece extends into the chute, and the chute is slidably fitted to the positioning piece.

As a preferred solution, the number of the chutes is multiple and parallel to each other; accordingly, the positioning members correspond to the chutes one-to-one.

As a preferred solution, the positioning member is a positioning pin.

As a preferred solution, the contact surface between the compensation block and the movable wedge is a plane, an inclined surface or a curved surface; if it is a curved surface, a rolling body is arranged between the compensation block and the movable wedge.

As a preferred solution, the compensation surface of the compensation block is a circular arc surface or a plane surface or has a texture.

Compared with the prior art, the present invention has the following beneficial effects:

The wedge wear self-compensating structure of the safety protection device of the present invention is based on the defect of the braking force drop caused by the wear of the movable wedge and the pair, and the contact friction compensation between the compensation block and the pair and the static small contact surface are used to obtain a larger The friction force improves the braking safety of the safety protection device and realizes effective safety protection under various working conditions.

Description of drawings

1 is a schematic structural diagram of a one-way safety gear according to Embodiment 1 of the present invention (the wedge cover plates on both sides are omitted);

2 is a schematic structural diagram of a left wedge block according to Embodiment 1 of the present invention;

Fig. 3 is the structural schematic diagram of the elastic rod of Embodiment 1 of the present invention;

4 is a schematic structural diagram of the seat body of the pressure bearing seat according to Embodiment 1 of the present invention;

5 is a schematic structural diagram of the limit plate of the pressure bearing seat according to Embodiment 1 of the present invention;

6 is a schematic structural diagram of an integrated linkage structure composed of a pressure bearing seat, an elastic rod and a left wedge block according to Embodiment 1 of the present invention;

7 is a schematic structural diagram of the clamp body of the one-way safety gear according to Embodiment 1 of the present invention;

8 is a schematic diagram of the installation structure of the compensation block and the positioning member according to Embodiment 1 of the present invention;

9 is a schematic diagram of the overall structure of the one-way safety gear according to Embodiment 1 of the present invention;

10 is a schematic structural diagram of the two-way safety gear according to Embodiment 2 of the present invention (the wedge cover plates on both sides are omitted);

11 is a schematic structural diagram of the clamp body of the two-way safety gear according to Embodiment 2 of the present invention;

12 is a schematic diagram of the overall structure of the two-way safety gear according to Embodiment 2 of the present invention.

Detailed ways

In order to illustrate the embodiments of the present invention more clearly, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts, and obtain other implementations.

Example 1:

The safety protection device of this embodiment uses a wedge wear self-compensating structure, which is applied to a one-way safety gear, that is, the safety protection device is a one-way safety gear.

As shown in Figure 1-9, the one-way safety gear includes a clamp body 1, a left wedge 2-1 and a right wedge 2-2. The middle of the clamp body 1 vertically forms a U-shaped channel in cross section, and the channel runs through the clamp The top and bottom surfaces of the body are used to install the elevator guide rail; the clamping body 1 is located on both sides of the passage to form two wedge mounting recesses, the mounting recesses of the two wedges are parallel, and the bottom of the mounting recess of the left wedge 2-1 The bottom of the mounting recess of the right wedge 2-2 is further away from the channel relative to its top than its top. Among them, the right wedge 2-2 is connected with the pulling mechanism for pulling and braking. When the right wedge is pulled to the target position, the braking surfaces of the two wedges rub against the elevator guide rail (ie, the pair) to achieve braking.

The one-way safety gear of this embodiment includes an elastic rod 3, which extends along the pulling direction of the wedge block (ie, extends vertically), and the top end of the elastic rod 3 abuts against the installation recess of the left wedge block 2-1 and the clamp In the transition section between the tops of the bodies, the bottom end of the elastic rod 3 abuts against the left wedge 2-1; wherein, as shown in FIG. 2, the top of the left wedge 2-1 has a deep groove 2a extending along its interior , the bottom end of the elastic rod 3 extends into the deep groove 2a; as shown in Figure 3, the bottom end of the elastic rod 3 has an anti-detachment hole 3a, and the left wedge 2-1 abuts against the anti-detachment hole through the bolt to achieve anti-detachment Installed so that part of the length of the elastic rod 3 is built in, the size of the one-way safety gear can be reduced, and the linkage between the elastic rod 3 and the left wedge 2-1 can be realized. In addition, the vertical distance between the top end of the elastic rod 3 and the braking surface of the left wedge 2-1 is greater than the vertical distance between its bottom end and the braking surface of the left wedge 2-1, and the top end of the elastic rod 3 The change from the vertical distance from the braking surface of the left wedge block 2-1 to the vertical distance between its bottom end and the braking surface of the left wedge block 2-1 is an arc change, that is, the elastic rod 3 is an arc shape Bent rod structure. In this way, when the left wedge 2-1 is pulled to the target position after contacting and rubbing with the elevator guide rail, the left wedge 2-1 is deformed in conjunction with the elastic rod 3 to generate a component force towards the elevator guide rail for the left wedge 2-1. , to improve the stability of the braking force, making the braking safer.

In addition, the top end of the elastic rod 3 is installed with a pressure bearing seat 4, and the pressure bearing seat 4 is located below the transition section between the installation recess of the left wedge 2-1 of the caliper body and the top of the caliper body; specifically, as shown in FIG. 1 As shown in , 4 and 5, the pressure-bearing seat 4 includes a seat body located on the upper side and a limit plate 40 fixedly mounted on the lower side of the seat body. The seat body has a limit groove 4a, the limit groove 4a and the elastic rod 3 In addition, the lower side of the spherical top of the elastic rod 3 has a clamping groove 3b (as shown in FIG. 3 ), the clamping position of the limit plate 40 is engaged with the clamping groove of the elastic rod, and the limit plate It is fixedly installed on the body of the pressure-bearing seat, so that the pressure-bearing seat 4 is linked with the elastic rod 3, so as to ensure the stability of the braking force generated by the deformation of the elastic rod. Among them, as shown in Figure 6, the pressure-bearing seat 4, the elastic rod 3 and the left wedge block 2-1 form an integrated linkage structure, that is, the three move with the movement of the left wedge block, and the pressure-bearing seat 4 and the clamp body 1 are connected. There is a surface contact fit between them. On the one hand, it is used to prevent the top end of the elastic rod 3 from being displaced under the action of external force, and on the other hand, it ensures the force application angle of the elastic rod 3 .

As shown in FIG. 1 , the self-compensating structure of the wedge block wear in this embodiment includes a compensation block 5 . Correspondingly, the right side of the channel of the caliper body 1 has a mounting recess for the compensation block 5 , and the compensation block 5 is located at the right wedge block 2 - 2 One side of the pulling direction is located above the right wedge block 2-2; the compensation block 5 is movably fitted with the clamp body 1 to approach or stay away from the elevator guide rail. When the right wedge 2-2 is pulled to the target position, the right wedge 2-2 is linked with the compensation block 5 to contact and rub against the elevator guide rail to realize self-compensation of the wedge wear.

Specifically, as shown in FIG. 7 , the top of the installation recess of the compensation block 5 has a guide structure 6 for guiding the compensation block 5 to approach or away from the elevator guide rail; the guide structure 6 is an inclined surface, which matches the top surface of the compensation block 5; when When the compensation block is lifted by the linkage of the right wedge block, the compensation block moves in the direction close to the elevator guide rail until it moves to contact the elevator guide rail for friction braking.

As shown in Figures 7-9, the clamp body 1 and the compensation block 5 are installed and matched through the sliding positioning structure, and the compensation block 5 is positioned through the wedge cover plate 7 installed on the clamp body 1; the wedge cover plate 7 and the sliding positioning structure are respectively Located on the front and rear sides of the compensation block 5; the sliding positioning structure includes a chute 1a located in the clamp body and a positioning piece 8 installed on the compensation block 5. The positioning piece 8 extends into the chute 1a, and the positioning piece 8 is slidably fitted in the chute 1a, so the sliding positioning structure of this embodiment can not only realize the positioning of the compensation block 5 but also realize the guiding of the compensation block 5 . When the right wedge block 2-2 is linked with the compensating block 5 to rise, the compensating block 5 moves in the direction close to the elevator guide rail until it contacts and rubs with the elevator guide rail to realize safe braking.

Among them, there are two sliding grooves 1a, which are parallel to each other; correspondingly, the positioning members 8 are matched with the sliding grooves 1a in one-to-one correspondence, and the positioning members 8 are preferably positioning pins, and can also be components such as screws. In addition, the contact surface between the top surface of the compensation block 5 and the top surface of the wedge block is an inclined surface (may also be a flat surface), which increases the contact area and improves the stability of the linkage between the two.

Example 2:

The safety protection device of this embodiment uses a wedge wear self-compensating structure, which is applied to a two-way safety gear, that is, the safety protection device is a two-way safety gear.

As shown in Figure 10-12, the two-way safety gear includes a clamp body 1, a left wedge 2-1 and a right wedge 2-2. The clamp body 1 vertically forms a U-shaped channel in cross section, and the channel runs through the top of the clamp body. The surface and the bottom surface are used to install the elevator guide rail; the clamping body 1 is located on both sides of the passage to form two wedge mounting recesses, the mounting recesses of the two wedges are parallel, and the bottom of the mounting recess of the left wedge 2-1 is opposite to its The top is closer to the channel and the bottom of the mounting recess of the right wedge 2-2 is further away from the channel than its top. Wherein, the left wedge 2-1 and the right wedge 2-2 are respectively connected with their respective pulling mechanisms for pulling and braking.

The two-way safety gear of this embodiment further includes two elastic rods 3 respectively disposed corresponding to the two wedges, and the elastic rods 3 extend along the pulling direction of the wedges (ie, extend vertically).

For the elastic rod 3 on the left, the top end of the elastic rod 3 abuts against the transition section between the installation recess of the left wedge 2-1 and the top of the caliper body, and the bottom end of the elastic rod 3 abuts against the left wedge 2- 1; Wherein, the top of the left wedge 2-1 has a deep groove extending along its interior (refer to Embodiment 1), and the bottom end of the elastic rod 3 is installed in the deep groove, so that part of the length of the elastic rod 3 is built in, which can be The size reduction of the two-way safety gear is realized. In addition, the vertical distance between the top end of the elastic rod 3 and the braking surface of the left wedge 2-1 is greater than the vertical distance between its bottom end and the braking surface of the left wedge 2-1, and the top end of the elastic rod 3 The change from the vertical distance from the braking surface of the left wedge block 2-1 to the vertical distance between its bottom end and the braking surface of the left wedge block 2-1 is an arc change, that is, the elastic rod 3 is an arc shape Bent rod structure. In this way, when the left wedge 2-1 is pulled to the target position after contacting and rubbing with the elevator guide rail, the left wedge 2-1 is deformed in conjunction with the elastic rod 3 to generate a component force towards the elevator guide rail for the left wedge 2-1. , to improve the stability of the braking force, making the braking safer.

For the elastic rod 3 on the right, the bottom end of the elastic rod 3 abuts against the transition section between the installation recess of the right wedge 2-2 and the bottom of the caliper body, and the top end of the elastic rod 3 abuts against the right wedge 2- 2; Among them, the bottom of the right wedge 2-2 has a deep groove extending along its interior, and the bottom end of the elastic rod 3 is installed in the deep groove, so that part of the length of the elastic rod 3 is built-in, and the size of the two-way safety gear can be reduced. . In addition, the vertical distance between the bottom end of the elastic rod 3 and the braking surface of the right wedge 2-2 is greater than the vertical distance between its top end and the braking surface of the right wedge 2-2, and the bottom of the elastic rod 3 The change from the vertical distance between the end and the braking surface of the right wedge block 2-2 to the vertical distance between its top end and the braking surface of the right wedge block 2-2 is an arc change, that is, the elastic rod 3 is an arc shape Bent rod structure. In this way, when the right wedge 2-2 is pulled to the target position after contacting and rubbing with the elevator guide rail, the right wedge 2-2 is deformed in conjunction with the elastic rod 3 to generate a component force towards the elevator guide rail for the right wedge 2-2. , to improve the stability of the braking force, making the braking safer.

In addition, the top end of the elastic rod 3 on the left is installed with a pressure bearing seat 4, and the specific installation structure can refer to Embodiment 1, which is used to prevent the top end of the elastic rod 3 from shifting under the action of external force. Specifically, for the structure of the pressure bearing seat 4, reference may be made to Embodiment 1, and details are not described here. Correspondingly, for the elastic rod 3 on the right side, a pressure bearing seat 4 is also installed at the bottom, and the installation structure of the left wedge block, the elastic rod on the left side and the pressure bearing seat is rotated 180 degrees to obtain the right wedge block and the elastic rod on the right side. And the installation structure of the pressure bearing seat.

In addition, a reset mechanism after braking is also correspondingly provided for the two wedge blocks. For details, reference may be made to the prior art, which will not be repeated here.

The self-compensating structure for wedge wear in this embodiment includes a left compensating block 5-1 and a right compensating block 5-2 respectively disposed corresponding to the left wedge and the right wedge.

For the compensating block 5-1 on the left, the bottom of the channel on the left side of the forceps body 1 has a mounting recess for the compensating block 5, and the compensating block 5-1 is located on one side of the pulling direction of the left wedge block 2-1, that is, on the left Below the wedge block 2-1; the compensation block 5-1 is movably matched with the clamp body 1 so as to be close to or away from the elevator guide rail. When the left wedge 2-1 is pulled to the target position, the left wedge 2-1 is linked with the compensation block 5-1 to contact and rub against the elevator guide rail to realize self-compensation of the wedge wear. Specifically, the bottom of the installation recess of the compensation block 5-1 has a guide structure 6-1, which is used to guide the compensation block 5-1 close to or away from the elevator guide rail; the guide structure 6-1 is an inclined surface, and the bottom surface of the compensation block 5-1 Matching; when the compensating block 5-1 is lowered by the linkage of the left wedge 2-1, the compensating block 5-1 moves in the direction close to the elevator guide rail (ie, moves to the right) until it moves to contact the elevator guide rail for friction braking. In addition, the caliper body 1 and the compensating block 5-1 are installed and matched through the sliding positioning structure, and the compensating block 5-1 is positioned through the left wedge cover plate 7-1 installed on the caliper body 1; the left wedge cover plate 7-1 and The sliding positioning structure is located on the front and rear sides of the compensation block 5-1 respectively; the sliding positioning structure includes a chute 1a on the clamp body and a positioning piece installed on the compensation block 5-1, the positioning piece extends into the chute 1a, and the positioning piece It is slidingly matched with the chute 1a (refer to Embodiment 1), so the sliding positioning structure can not only realize the positioning of the compensation block 5-1, but also realize the guiding of the compensation block 5-1. When the left wedge 2-1 is linked with the compensation block 5-1 to descend, the compensation block 5-1 moves in the direction close to the elevator guide rail until it contacts and rubs with the elevator guide rail to realize safe braking. The compensation surface of the compensation block 5-1 is a plane structure with texture.

For the installation structure of the compensation block 5-2 on the right side, refer to the installation structure of the compensation block 5-1 on the left (rotated by 180° relative to the installation structure of the compensation block 5-1), or refer to the compensation block of Embodiment 1 The installation structure is not repeated here.

Thereby, the self-compensation of the wedge wear of the two-way braking of the two-way safety gear is realized.

Example 3:

The difference between the wedge wear self-compensation structure for the safety protection device of this embodiment and Embodiment 1 or Embodiment 2 is:

The relative positions of the positioning piece and the chute included in the sliding positioning structure are interchanged, that is, the positioning piece is installed on the clamp body, and the chute is set on the compensation block, which can also realize the positioning of the compensation block, making the structure diverse and satisfying different applications. demand.

For other structures, refer to Embodiment 1 or Embodiment 2.

Example 4:

The number of parallel chutes is not limited to the above two, but can also be one, three, etc., which can be set according to actual needs to achieve structural diversification and meet the needs of different applications.

For other structures, refer to Embodiment 1 or Embodiment 2.

Example 5:

The guide structure corresponding to the compensation block can also be a curved surface and rolling elements arranged in it, so as to realize the guidance of the compensation block, so that the compensation block is close to or away from the elevator guide rail. the needs of the occasion.

For other structures, refer to Embodiment 1 or Embodiment 2.

Example 6:

The contact surface between the compensation block and its corresponding wedge block can also be a curved surface. Correspondingly, rolling elements are arranged between the compensation block and the wedge block, which are specifically set according to actual needs to achieve structural diversification and meet the needs of different applications.

For other structures, refer to Embodiment 1 or Embodiment 2.

Example 7:

The positioning member can also be a rolling ball. The two sides of the rolling ball are respectively embedded in the chute of the clamp body and the chute of the compensation block, so as to realize the function of sliding positioning. It can be set according to the actual needs to realize the structure diversification and meet different applications. the needs of the occasion.

For other structures, refer to Embodiment 1 or Embodiment 2.

Example 8:

The compensation surface of the compensation block can also be a circular arc surface or a flat surface or a circular arc surface with lines, etc., which can be set according to actual needs to achieve structural diversification and meet the needs of different applications.

For other structures, refer to Embodiment 1 or Embodiment 2.

The above is only a detailed description of the preferred embodiments and principles of the present invention. For those of ordinary skill in the art, according to the ideas provided by the present invention, there will be changes in the specific implementation, and these changes should also be It is regarded as the protection scope of the present invention.

Claims

A wedge wear self-compensation structure for a safety protection device, the safety protection device includes a base and a movable wedge movably matched with the base, characterized in that the wedge wear self-compensation structure includes a compensation block, and the compensation block Located in the moving direction of the movable wedge, the compensation block is movably arranged between the base and the movable wedge to approach or stay away from the counterpart; when the movable wedge is pulled to the target position, the movable wedge is linked with the compensation block to move to the counterpart. contact friction.
The wedge wear self-compensating structure for a safety protection device according to claim 1, wherein the base has a guiding structure for guiding the compensating block closer to or away from the counterpart.
The wedge wear self-compensating structure for a safety protection device according to claim 2, wherein the guiding structure is an inclined surface or a curved surface and a rolling element provided therein.
The wedge wear self-compensation structure for a safety protection device according to claim 1, wherein a sliding positioning structure is provided between the base and the movable wedge corresponding to the compensation block, so that the compensation block is in the movable wedge. Under the action of the block, it moves in the direction perpendicular to the braking surface of the counterpart and contacts the counterpart.
The wedge wear self-compensating structure for a safety protection device according to claim 4, wherein the compensating block is further limited by a wedge cover installed on the base; wherein, the wedge cover and the sliding The positioning structures are respectively located on both sides of the compensation block.
The wedge wear self-compensating structure for a safety protection device according to claim 5, wherein the sliding positioning structure comprises a sliding groove located on the base and a positioning member installed on the compensation block, and the positioning member extends to the sliding position. slot, and the positioning piece is slidably fitted in the chute;

Alternatively, the sliding positioning structure includes a positioning piece mounted on the base and a chute located on the compensation block, the positioning piece extends into the chute, and the chute is slidably fitted to the positioning piece.
The wedge wear self-compensating structure for a safety protection device according to claim 6, wherein the number of the chute is multiple and parallel to each other; correspondingly, the positioning member corresponds to the chute one-to-one.
The wedge wear self-compensating structure for a safety protection device according to claim 6, wherein the positioning member is a positioning pin.
The wedge wear self-compensation structure for a safety protection device according to claim 1, wherein the contact surface between the compensation block and the movable wedge is a plane, an inclined surface or a curved surface; if it is a curved surface, the compensation block and the movable wedge Rolling bodies are set between the movable wedges.
A self-compensating structure for wear of a wedge block for a safety protection device according to claim 1, wherein the compensation surface of the compensation block is a circular arc surface or a plane surface or has a texture.