WO2022178843A1

WO2022178843A1 - Brake assembly for safety protection device

Info

Publication number: WO2022178843A1
Application number: PCT/CN2021/078199
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 brake assembly for a safety protection device. The safety protection device comprises a base and a brake block that movably fits with the base. The brake assembly comprises an elastic rod (3), wherein the elastic rod (3) extends in the pulling direction of the brake block; a first end of the elastic rod (3) abuts against the base, and a second end of the elastic rod (3) abuts against the brake block; and when pulled to a target position, the brake block is linked with the elastic rod to make same deform, such that a component force towards a mating member is generated on the brake block. In the brake assembly, the overall size is reduced, and the installation space is reduced; the brake assembly, which is integrated with an elastic element, can move up and down, and thus bi-directional braking is achieved easily, thereby greatly reducing the overall height of a bi-directional brake device; and the brake stability is improved by means of the rapid response of the elastic rod, such that the brake safety is higher.

Description

A brake assembly for a safety protection device

technical field

The invention belongs to the technical field of elevator safety protection, and in particular relates to a braking assembly for a safety protection device.

Background technique

At present, most elevator safety protection devices use brake blocks to realize safe braking; for example, the elevator braking device disclosed in the patent document with publication number CA1298214C. During the braking process of the elevator safety protection device, the brake wedge needs to respond quickly to obtain stable braking performance. In the elevator braking device disclosed in the above-mentioned patent documents, a compression spring is arranged between the casing and the upper end of the braking wedge, the compression spring pushes the braking wedge downward obliquely, and the compression spring is fixed in place by a fixing bolt, and the The bolt is fixed in the brake wedge, but can move relative to the casing through the opening of the casing, and the diameter of the opening is larger than the diameter of the fixing bolt; The spring force on the moving wedge is parallel to the guide surface of the brake wedge.

Most of the compression springs used as elastic elements are connected in series with multiple disc springs. There is internal resistance or the response of the compression process and the braking force cannot respond quickly, resulting in a decrease in the stability of the braking process. Moreover, the height of the disc springs connected in series is relatively high, resulting in a relatively large structural dimension of the elevator safety protection device, thereby affecting the installation space. On the other hand, since the overall size of the series disc spring is relatively high when it is bidirectional, the installation space is large.

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 One or more brake assemblies for a safety protection device.

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

A braking assembly for a safety protection device, the safety protection device includes a base and a braking block movably matched with the base, the braking assembly includes an elastic rod, and the elastic rod is along the pulling direction of the braking block Extend, the first end of the elastic rod is against the base, and the second end of the elastic rod is against the brake block; when the brake block is pulled to the target position, the brake block is deformed in conjunction with the elastic rod to prevent the brake block Create a force component towards the dual.

As a preferred solution, the vertical distance between the first end of the elastic rod and the braking surface of the brake pad is greater than the vertical distance between the second end of the elastic rod and the braking surface of the braking pad.

As a preferred solution, the change from the vertical distance between the first end of the elastic rod and the braking surface of the braking pad to the vertical distance between the second end and the braking surface of the braking pad is a linear change or a nonlinear change or a linear change. A combination of variation and nonlinear variation.

As a preferred solution, the nonlinear change is an arc change.

As a preferred solution, the second end of the elastic rod extends to a predetermined depth inside the brake block.

As a preferred solution, the second end of the elastic rod is connected with the brake block to prevent disengagement.

As a preferred solution, elastic rods are respectively installed on both sides of the brake block.

As a preferred solution, a pressure-bearing seat is installed on the first end of the elastic rod, and the pressure-bearing seat, the elastic rod and the brake block form an integrated linkage structure; the pressure-bearing seat and the base are in surface contact fit.

As a preferred solution, the pressure-bearing seat is provided with a limit groove, and the limit groove is in limit fit with the first end of the elastic rod.

As a preferred solution, the base has a slot corresponding to the first end of the elastic rod, and the first end of the elastic rod is snap-fitted with the slot.

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

(1) When the brake block is pulled to the target position, the brake block is linked with the elastic rod to deform, thereby generating a component force on the brake block toward the counterpart, improving the stability of the braking force, and making the braking safer; Compared with the existing disc spring, the elastic rod responds faster under the action of external force, and reduces the stroke to decelerate the safety brake instantly;

(2) The occupied space of the elastic rod is smaller than that of the disc spring, which solves the problem that the height of the disc spring increases the structure size and affects the installation space, which is conducive to the miniaturization of the safety protection device; after replacing the disc spring, it solves the problem of the disc spring. The internal resistance causes the defect of unstable force value; and there is no need to install multiple disc springs, and the installation is more convenient;

(3) The elastic rod can be extended into the brake block or installed on both sides of the brake block to save space;

(4) The pressure bearing seat, the elastic rod and the brake block form an integrated linkage structure, which ensures the force application angle of the elastic rod, and also facilitates the realization of the unilateral pulling motion function of the two-way safety gear;

(5) The design of the pressure bearing seat or the card slot makes the deformation of the elastic rod more stable, further improves the stability of the braking force, and further improves the safety of the braking.

Description of drawings

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

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

8 is a schematic diagram of the main structure of the two-way safety gear according to Embodiment 2 of the present invention;

9 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 describe the embodiments of the present invention more clearly, the following will describe specific embodiments of the present invention 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 braking assembly for the safety protection device of this embodiment is applied to a one-way safety gear, that is, the safety protection device is a one-way safety gear.

As shown in Figure 1-7, the one-way safety gear includes a clamp body 1, a left wedge block 2-1 and a right wedge block 2-2. The clamp body 1 vertically forms a U-shaped channel in cross section, and the channel runs through the clamp body. The top surface and the bottom surface are used to install the elevator guide rails; the clamping body 1 is located on both sides of the passage to form the installation recesses of the two wedge blocks, the installation recesses of the two wedge blocks are parallel, and the bottom of the installation recess of the left wedge block 2-1 is opposite to Its 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. 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 brake assembly 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 mounting recess of the left wedge block 2-1 and the caliper 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 .

Example 2:

The braking assembly for the safety protection device of this embodiment is applied to a two-way safety gear, that is, the safety protection device is a two-way safety gear.

As shown in Figures 8 and 9, 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 brake assembly of this embodiment 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, for the elastic rod 3 on the left, a pressure-bearing seat 4 is installed on the top thereof, 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 on the right side, the 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, the elastic rod on the right side and the The installation structure of the pressure bearing seat.

In addition, a reset mechanism 5 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.

Example 3:

The difference between the braking assembly for safety protection device of this embodiment and Embodiment 1 or Embodiment 2 is:

The change from the vertical distance between the top end of the elastic rod and the braking surface of the corresponding wedge to the vertical distance between the bottom end and the braking surface of the corresponding wedge is a linear change. The wedge blocks generate a component force towards the elevator guide rail, which realizes structural diversification and meets the needs of different applications.

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

Example 4:

The change from the vertical distance between the top end of the elastic rod and the braking surface of the corresponding wedge to the vertical distance between the bottom end and the braking surface of the corresponding wedge is linear change + non-linear change, for example: the upper half of the elastic rod is linear The changing section, the lower half is an arc section, can also realize the component force on the corresponding wedge block towards the elevator guide rail, realize the structure diversification, and meet the needs of different application occasions.

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

Example 5:

The elastic rod can not be fixedly installed with the corresponding wedge block, that is, the elastic rod can be inserted into the deep groove of the corresponding wedge block, as long as it does not break away from the wedge block or the elastic rod is fixed with the pressure bearing seat within the movable stroke of the wedge block, so as to realize various structures. to meet the needs of different applications.

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

Example 6:

The installation methods and quantities of the elastic rods are different. The elastic rods can be installed on the front and rear sides of the wedge, that is, lugs or installation grooves are distributed and formed on the front and rear sides of the wedge, and the elastic rods abut against the corresponding The lugs are embedded in the corresponding installation grooves, and the corresponding wedges can also generate a force component toward the elevator guide rail, realize the structure diversification, and meet the needs of different application occasions.

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

Example 7:

By omitting the setting of the pressure-bearing seat, when the clamp body is formed, a clamping groove can be designed directly at the corresponding position of the clamp body corresponding to the end of the elastic rod. Generates stability in braking force. Realize structure diversification to 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 braking assembly for a safety protection device, the safety protection device includes a base and a braking block movably matched with the base, characterized in that the braking assembly includes an elastic rod, and the elastic rod extends along the braking block The first end of the elastic rod is against the base, and the second end of the elastic rod is against the brake block; when the brake block is pulled to the target position, the brake block is linked with the elastic rod to deform to Creates a force component on the brake pad towards the counterpart.
The braking assembly for a safety protection device according to claim 1, wherein the vertical distance between the first end of the elastic rod and the braking surface of the braking block is greater than the vertical distance between the second end of the elastic rod and the braking surface of the braking block. The vertical distance between the braking surfaces of the moving blocks.
The brake assembly for a safety protection device according to claim 2, wherein the vertical distance between the first end of the elastic rod and the braking surface of the brake block is to the second end of the elastic rod and the brake block. The change of the vertical distance of the braking surface is a linear change or a nonlinear change or a combination of the linear change and the nonlinear change.
The braking assembly for a safety protection device according to claim 3, wherein the nonlinear change is an arc change.
The braking assembly for a safety protection device according to claim 1, wherein the second end of the elastic rod extends to a predetermined depth inside the braking block.
The braking assembly for a safety protection device according to claim 5, wherein the elastic rod is connected with the braking block to prevent disengagement.
The braking assembly for a safety protection device according to claim 1, wherein elastic rods are respectively installed on both sides of the braking block.
A brake assembly for a safety protection device according to any one of claims 1-7, wherein the first end of the elastic rod is provided with a pressure bearing seat, the pressure bearing seat, the elastic rod and the brake The blocks form an integrated linkage structure; the pressure-bearing seat and the base are in surface contact fit.
The brake assembly for a safety protection device according to claim 8, wherein the pressure bearing seat has a limit groove, and the limit groove is in limit fit with the first end of the elastic rod.
The brake assembly for a safety protection device according to any one of claims 1-7, wherein the base has a slot corresponding to the first end of the elastic rod, and the first end of the elastic rod Fits with the card slot.