WO2020211662A1

WO2020211662A1 - Roller speed measuring apparatus

Info

Publication number: WO2020211662A1
Application number: PCT/CN2020/083160
Authority: WO
Inventors: 邹家春; 姚荣康; 刘坤; 张田生
Original assignee: 杭州沪宁电梯部件股份有限公司
Priority date: 2019-04-15
Filing date: 2020-04-03
Publication date: 2020-10-22
Also published as: CN111824893A; CN111824893B

Abstract

A roller speed measuring apparatus, comprising at least two rollers matching an elevator guide rail (A), the rollers being respectively a first roller (1) and a second roller (2). The first roller (1) and the second roller (2) are located on two sides of the guide rail (A), respectively; a distance from the circle center of the first roller (1) to the guide rail (A) is smaller than the radius of the first roller (1); a distance from the circle center of the second roller (2) to the guide rail (A) is smaller than the radius of the second roller (2); at least one of the first roller (1) and the second roller (2) is provided with a speed measuring structure. According to the roller speed measuring apparatus, the two rollers are provided on the two sides of the elevator guide rail and a certain pre-pressure is applied; the rollers always match the guide rail without being separated from the guide rail, the rollers are effectively prevented from being separated from the elevator guide rail, a speed measuring structure is provided in the rollers, speed measurement is more accurate, synchronism is better, and effectiveness of an elevator safety protection apparatus is enhanced.

Description

Wheel speed measuring device

Technical field

The invention belongs to the technical field of elevator equipment, and specifically relates to a roller speed measuring device.

Background technique

The elevator speed limiter monitors and controls the speed of the car at any time. When an overspeed situation occurs, it can send out a signal in time, and then generate a mechanical action to cut off the power supply circuit or trigger other safety devices to brake the elevator car. One of the safety control components in the safety protection system.

The working principle of the elevator speed limiter is to match the speed limiter with the same reference object of the car motion state, such as timing belt, wire rope, guide rail, etc., to drive the speed limiter to rotate to detect the motion state of the car. The existing speed limiter Synchronous belts and steel wire ropes are used for coordination. However, with the continuous improvement of elevator floors, the speed limiter using synchronous belts and steel wire ropes will cause synchronous belts and long wire ropes, which is extremely inconvenient to install, and the synchronous belts or wire ropes will shake Affecting the car, the requirements for the tensioning device are also relatively high, and the guide rail is in a fixed state relative to the timing belt and the wire rope, and the stability is high. Therefore, the use of the roller speed limiter to replace the timing belt and the wire rope can greatly save installation costs. At the same time, the stability of the speed limiter's speed measurement is improved.

Aiming at the above technical problems, a new type of roller speed measuring device is proposed.

Summary of the invention

Based on the above-mentioned shortcomings in the prior art, the present invention provides a roller speed measuring device.

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

A roller speed measuring device, comprising at least two rollers matched with an elevator guide rail, a first roller and a second roller respectively, the first roller and the second roller are respectively located on both sides of the guide rail, the center of the first roller is to The distance of the guide rail is smaller than the radius of the first roller, the distance from the center of the second roller to the guide rail is smaller than the radius of the second roller, and at least one of the first roller and the second roller has a speed measuring structure.

As a preferred solution, the center of the first roller and the center of the second roller are located on the same plane perpendicular to the guide rail.

As a preferred solution, the center of the first roller and the center of the second roller are located on the same straight line perpendicular to the guide rail.

As a preferred solution, the radius of the first roller and the radius of the second roller are the same.

As a preferred solution, the distance from the center of the first roller to the side is equal to the distance from the center of the second roller to the side.

As a preferred solution, the roller speed measuring device further includes a base and a swing connection part, the swing connection part is used to fixedly connect the first roller and the second roller, and the swing connection part is swingably connected to the base.

As a preferred solution, the first roller has a mechanical and/or electronic speed measurement structure, and the second roller has a mechanical and/or electronic speed measurement structure.

As a preferred solution, it is characterized in that the first roller surface and the second roller surface are respectively provided with elastic rings.

Compared with the prior art, the present invention has the following beneficial effects: the present invention uses the guide rail as the detection of the speed limit of the car operation, eliminating the need for steel wire ropes and timing belts. Cooperate without departing from the track, so that the speed measurement is more accurate, the synchronization is better, and the effectiveness of the elevator safety protection device is enhanced.

Description of the drawings

Fig. 1 is a schematic diagram of the overall structure of a roller speed measuring device according to the first embodiment of the present invention;

2 is a schematic diagram of the base and the swing connection part of the roller speed measuring device according to the first embodiment of the present invention.

Among them: A. Guide rail; 1. First roller; 2. Second roller; 3. Swing connection part; 4. Base.

detailed description

In order to explain the embodiments of the present invention more clearly, the specific embodiments of the present invention will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings and obtained Other embodiments.

Example one:

As shown in Figure 1-2, the roller speed measuring device of this embodiment is used in the process of matching the roller speed governor with the elevator guide rail A to avoid the risk of derailment of the speed governor, including the first roller 1 and the first roller matching the elevator guide rail A. Two rollers 2, the first roller 1 and the second roller 2 are respectively located on both sides of the guide rail A, apply a certain pre-pressure to the first roller 1 and the second roller 2, so that the first roller 1 and the second roller 2 are always in contact with the guide rail A contact to avoid derailment, wherein at least one of the first roller 1 and the second roller 2 has a speed measuring structure.

Specifically, the first roller 1 and the second roller 2 are fixed on the car through the base 4 and the swing connecting portion 3 and respectively match the two side guide surfaces of the elevator guide rail A, so that the center of the first roller 1 reaches the first roller 1 The distance between the guide surface on the side of the guide rail A is less than the radius of the first roller 1, and the distance from the center of the second roller 2 to the guide surface on the side A of the guide rail where the second roller is located is less than the radius of the second roller 2. At this time, the first roller 1 is on the elevator guide rail There is pre-pressure on one side of A, and the second roller 2 has pre-pressure on the other side of elevator guide rail A. The directions of the two pre-pressures are opposite. Under the action of two opposite pre-pressures, the speed of the first roller and the second Roller 2 can be closely matched with guide rail A. Compared with a single roller speed governor with guide rail A, a single roller speed governor has a rigid contact, and there will be a disengagement between the roller and guide rail A. When the elevator car moves, the roller Cannot fit well with guide rail A, the speed is 0 or does not match the speed of the car movement; the center of the first roller 1 and the center of the second roller 2 are located on the same plane perpendicular to the guide rail A, and in the same straight line perpendicular to the guide rail A Above, at this time, the pre-pressure of the first roller 1 and the pre-pressure of the second roller 2 are opposite, and are located in the same straight line direction, and no resolution force in other directions is generated, and the structural stability is high. The swing connecting portion 3 is fixedly connected to the roller shafts of the first roller 1 and the second roller 2, and is swingably connected to the base 4 through the axle and other bearings, so that the first roller 1 and the second roller 2 can be fixed relative to the base 4 The swing movement of the stroke leaves a buffer space for the shaking during the movement of the car; preferably, an elastic member is added between the swing connection 3 and the base 4 to reset the swing movement of the swing connection 3.

The first roller 1 and the second roller 2 use rollers with the same radius to facilitate the synchronization of the speed of the two rollers, reducing the complexity of structure, setting and debugging and maintenance; the distance from the center of the first roller 1 to the side and the distance from the center of the second roller 2 to the side The distance between the two rollers is equal, and the installation accuracy is easy to control. At the same time, the interaction force of the two pre-pressures tends to be balanced, which facilitates the synchronization of the loss of the two rollers, and facilitates later debugging and maintenance. When using conventional rollers, such as stainless steel rollers, the difference between the distance between the center of the first roller 1 and the guide rail A and the radius of the first roller 1 is less than 2cm, and the difference between the distance between the center of the second roller 2 and the guide rail A and the radius of the second roller 2 Less than 2cm, after long-term test and debugging, the loss of the rollers in the process of matching with the guide rail A within this difference range is small, and the pre-pressure generated at the same time can make the two rollers and the guide rail A effectively cooperate. Preferably, the difference between the distance between the center of the first roller 1 and the guide rail A and the radius of the first roller 1 is 0.5 cm, and the difference between the distance between the center of the second roller 2 and the guide rail A and the radius of the second roller 2 is 0.5 cm. It is convenient to install the roller speed measuring device, and the installation accuracy is easy to control. The loss of the roller and the guide rail A is small, and the pre-pressure generated at the same time can make the two rollers and the guide rail A effectively cooperate; due to the different characteristics of different roller materials, the actual The difference distance can be adjusted according to the material of the roller.

The first roller 1 has a mechanical speed measurement structure such as a centrifugal mechanism to cooperate with a trigger mechanism, and the second roller 2 has an electronic speed measurement structure such as an encoder and a trigger mechanism for measuring the rotation speed of the roller. The two roller speed limiter trigger mechanisms are linked and connected for lifting The device or braking device adopts redundant design to detect the running status of the elevator car. Preferably, the surface of the first roller and the surface of the second roller are respectively provided with elastic rings, and the material can be rubber, silica gel, etc., to reduce friction loss when the roller is matched with the guide rail A.

It should be noted that because the roller has a wheel width and thickness, in this application, the center of the roller refers to the center of the surface of the roller where the center point of the contact surface of the roller matches the guide rail A. If the first roller surface and the second roller surface are respectively provided with elastic rings, the radius of the first roller 1 and the radius of the second roller 2 include the thickness of the elastic ring.

The roller speed measuring device of the utility model is equipped with two rollers on both sides of the elevator guide rail A and applies a certain pre-pressure, so that the rollers always fit with the guide rail A without leaving the track, effectively avoiding the rollers from disengaging from the elevator guide rail A. The rollers have Speed measurement structure, the speed measurement is more accurate, the synchronization is better, and the redundant design is adopted to enhance the effectiveness of the elevator safety protection device.

Embodiment two:

The difference between the roller speed measuring device of this embodiment and the first embodiment is:

The center of the first roller and the center of the second roller are located on the same plane perpendicular to the guide rail instead of on the same straight line. Compared with the first embodiment, the center of the first roller and the center of the second roller can be staggered back and forth at the same height of the guide rail, and the corresponding structure can be selected according to the site installation conditions.

Refer to Embodiment 1 for other structures.

Example three:

The center of the first roller and the center of the second roller are not located on the same plane perpendicular to the guide rail. Compared with the first embodiment, the center of the first roller and the center of the second roller can be staggered at different heights of the guide rail, and the corresponding structure can be selected according to the site installation conditions.

Refer to Embodiment 1 for other structures.

Embodiment four:

The radius of the first roller is different from the radius of the second roller. Different roller radii limit the speed of the rollers according to the actual car speed limit requirements. Compared with the first embodiment, the corresponding structure is selected according to the site installation conditions.

Refer to Embodiment 1 for other structures.

Embodiment five:

The distance from the center of the first roller to the side surface is not equal to the distance from the center of the second roller to the side surface, and the distance is adapted according to the actual roller material. Compared with the first embodiment, the distance from the center of each roller to the side surface is not limited.

Refer to Embodiment 1 for other structures.

Embodiment 6:

The base and the swing connection part can be omitted, and the first roller and the second roller can be directly fixed on the car through the mounting frame. Compared with the first embodiment, the structure is simplified.

Refer to Embodiment 1 for other structures.

Embodiment Seven:

There is an electronic speed measuring structure in the first roller, and a mechanical speed measuring structure in the second roller; or there is no speed measuring structure in the first roller; or there is no speed measuring structure in the second roller; or the combination of the speed measuring structures in the two rollers can be dual mechanical , Dual electronic type, etc.; or the first roller also has an electronic speed measurement structure, and the second roller also has a mechanical speed measurement structure. Compared with the first embodiment, the specific structure and combination of the first roller speed measurement structure and the second roller speed measurement structure are not limited.

Refer to Embodiment 1 for other structures.

Embodiment 8:

A plurality of rollers may be added to the first roller side and/or the second roller side, and the rollers of the plurality of rollers may have a speed limit mechanism as a backup, or set a multi-level speed limit. Compared with the first embodiment, the number of rollers is not limited, and multiple rollers are set to have the function of backup or multi-level speed limit.

Refer to Embodiment 1 for other structures.

It should be noted that the above embodiments can be freely combined as required. 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 specific implementations, and these changes should also It is regarded as the protection scope of the present invention.

Claims

A roller speed measuring device, which is characterized in that it comprises at least two rollers matched with an elevator guide rail, a first roller and a second roller respectively, the first roller and the second roller are respectively located on both sides of the guide rail, and the first roller The distance from the center of a roller to the guide rail is less than the radius of the first roller, the distance from the center of the second roller to the guide rail is less than the radius of the second roller, and at least one of the first roller and the second roller has a speed measuring structure.
The roller speed measuring device according to claim 1, wherein the center of the first roller and the center of the second roller are located on the same plane perpendicular to the guide rail.
The roller speed measuring device according to claim 2, wherein the center of the first roller and the center of the second roller are located on the same straight line perpendicular to the guide rail.
A roller speed measuring device according to claim 3, wherein the radius of the first roller is the same as the radius of the second roller.
A roller speed measuring device according to claim 4, wherein the distance from the center of the first roller to the side is equal to the distance from the center of the second roller to the side.
A roller speed measuring device according to claim 5, characterized in that, the roller speed measuring device further comprises a base and a swing connection part, the swing connection part is used to fixedly connect the first roller and the second roller, the The swing connection part is swing-connected to the base.
The rolling wheel speed measuring device according to any one of claims 1 to 6, wherein the first rolling wheel has a mechanical and/or electronic speed measuring structure, and the second rolling wheel has a mechanical and/or electronic speed measuring structure.