CN113581976A

CN113581976A - Guide device for an elevator car and elevator system

Info

Publication number: CN113581976A
Application number: CN202010362393.6A
Authority: CN
Inventors: 李必春; 王身鸿
Original assignee: Otis Elevator Co
Current assignee: Otis Elevator Co
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-11-02

Abstract

The invention provides a guiding device for an elevator car and an elevator system. The guide device includes: a roller guide frame; at least one roller rotatably mounted to the roller guide frame, the roller configured to roll on an elevator guide rail as the elevator car moves; wherein the guide device further comprises: a braking device that inhibits rotation of the roller when activated. The device according to the embodiment of the invention is simple and compact in structure.

Description

Guide device for an elevator car and elevator system

Technical Field

The present invention relates to the field of elevators, and more particularly to a device and system for maintaining stability during elevator stops.

Background

In high-rise buildings, the travel of the elevator is longer. When the elevator car is at a low floor, the length of the rope between the elevator car and the hoisting machine becomes longer, which length of rope inevitably will lengthen or shorten when the weight of the passengers in the elevator car changes. Consequently, passengers will experience bouncing or vibrations of the elevator car e.g. due to deformation of the ropes when entering or exiting the elevator.

Disclosure of Invention

It is an object of the present invention to solve or at least alleviate problems in the prior art.

According to an aspect, there is provided a guiding device for an elevator car, comprising:

a roller guide frame;

at least one roller rotatably mounted to the roller guide frame, the roller configured to roll on an elevator guide rail as the elevator car moves;

wherein the guide device further comprises: a braking device that inhibits rotation of the roller when activated.

Optionally, in the guiding device for an elevator car, a control device is further included, the control device being coupled with the braking device and configured to activate the braking device when the car is stopped and to release the braking device before the car starts moving.

Optionally, in the guide device for an elevator car, the control device is configured to: the braking device is activated during the stopping of the elevator car and the opening of the car door, and the braking device is released during the closing of the car door and/or when the elevator is in a standby state.

Optionally, in the guide apparatus for an elevator car, the braking device includes:

a brake module, the brake module comprising: a friction member switchable between a braking position, in which the friction member frictionally acts on the at least one roller to inhibit rotation of the at least one roller, and a rest position, in which the friction member is spaced from the at least one roller;

a pull wire connected to the friction member; and

a brake connected with the pull lead and configured to pull the pull lead to cause a friction member of the brake module to move from the rest position to the braking position.

Optionally, in the guide apparatus for an elevator car, the at least one roller comprises: the braking device comprises a first roller and a second roller which are arranged side by side, a gap is formed between the first roller and the second roller to accommodate a guide rail, the pressure between the rollers and the guide rail is pre-compressed by a certain distance through springs to ensure that the rollers and the guide rail are tightly attached to a working surface of the guide rail, and the braking device acts on both the first roller and the second roller when being used.

Optionally, in the guide apparatus for an elevator car, the braking device includes: the brake device comprises a first brake module acting on a first roller and a second brake module acting on a second roller, wherein the first brake module and the second brake module are connected to the same brake through pull wires respectively.

Optionally, in the guide device for an elevator car, the friction member acts on an outer race of the at least one roller wheel body.

Optionally, in the guide device for an elevator car, the friction member acts on a hub of the at least one roller.

Optionally, in the guide device for an elevator car, the friction member acts on a rotation shaft of the at least one roller or an attachment fixed to the rotation shaft of the at least one roller.

According to another aspect, there is also provided an elevator system comprising:

an elevator car;

the traction machine drives the elevator car to move; and

a guide device for an elevator car according to various embodiments connected to the elevator car to guide movement of the elevator car along a guide rail.

Alternatively, the traction machine is connected to the car by a rope belt integrated with a plurality of ropes.

Drawings

The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are for illustrative purposes only and are not intended to constitute a limitation on the scope of the present invention. Moreover, in the drawings, like numerals are used to indicate like parts, and in which:

fig. 1 is a schematic diagram of an exemplary elevator system;

fig. 2 is a perspective view of an exemplary guide for an elevator car;

fig. 3 is a schematic view of an exemplary manner of engagement of a guide device for an elevator car with a guide rail;

FIG. 4 is a perspective view of a guide according to one embodiment;

FIG. 5 is a top view of a guide according to one embodiment;

FIG. 6 is a side view of a guide according to one embodiment;

FIG. 7 is a front view of a guide according to one embodiment;

FIG. 8 is a perspective view of a roller according to one embodiment; and

FIG. 9 is a perspective view of a roller according to another embodiment.

Detailed Description

Fig. 1 is a perspective view of an elevator system 101 including an elevator car 103, a counterweight 105, ropes 107, guide rails 109, a machine 111, and an elevator system controller 115. The elevator car 103 and the counterweight 105 are connected to each other via ropes 107. The cords 107 may comprise or be configured as, for example, ropes, steel cables, and/or coated steel belts, and in this embodiment, the cords are configured as cord belts integrated with a plurality of cords. The counterweight 105 is configured to balance the load of the elevator car 103 and is configured to facilitate simultaneous and reverse movement of the elevator car 103 relative to the counterweight 105 within the hoistway 117 and along the guide rails 109. The ropes 107 engage a traction machine 111 that is part of the overhead structure of the elevator system 101. The hoisting machine 111 is configured to control movement between the elevator car 103 and the counterweight 105.

An elevator system controller 115 is positioned within an elevator system controller compartment 121 of the hoistway 117 as shown and is configured to control operation of the elevator system 101 and, in particular, the elevator car 103. For example, the elevator system controller 115 can provide drive signals to the hoist 111 to control acceleration, deceleration, leveling, stopping, etc. of the elevator car 103. The elevator car 103 can stop at one or more landings 125 as controlled by an elevator system controller 115 when moving up or down within the hoistway 117 along guide rails 109. Although shown at the elevator system controller room 121, one skilled in the art will appreciate that the elevator system controller 115 can be located and/or configured at other locations or locations within the elevator system 101. The traction machine 111 may include a motor or similar drive mechanism.

Although shown and described with respect to a roping system, elevator systems employing other methods and mechanisms for moving an elevator car within a hoistway can also employ embodiments of the present disclosure. FIG. 1 is merely a non-limiting example presented for illustrative and explanatory purposes.

Turning now to fig. 2 and 3, wherein fig. 2 is a partial perspective view of an elevator car frame 200 on which two guide means 202 for an elevator car are mounted. Fig. 3 is a top-down schematic view of a guide 202 for an elevator car as engaged with a guide rail 109 of an elevator system. The elevator car frame 200 includes a cross frame 206 extending between a pair of vertical frames 208. A guide 202 for an elevator car is mounted to at least one of a cross frame 206 and a mullion 208 at a mounting base as is known in the art. The mounting base defines at least a portion of the roller guide frame 210 or the roller guide frame 210 is mounted to a mounting base for mounting and supporting the guide 202 with at least one roller to the elevator car. Although only one pair of guides 202 of the top of the elevator car is shown in fig. 2, alternatively one pair of guides can be provided at the bottom or middle of the elevator car, or two or more pairs of guides 202 can be located at the top, middle and/or bottom of the elevator car, respectively.

The guiding devices 202 for the elevator car are each configured to engage with a guide rail 109 (fig. 3) and move along said guide rail 109. The guide rail 109 has a base 214 and an engaging portion 216, e.g. in the form of a sheet, and the rollers of the guide arrangement 202 for the elevator car engage and roll along respective faces of the engaging portion 216 of the guide rail 109. For example, the guide 202 for an elevator car shown in fig. 3 includes a first roller 219, a second roller 220, and a third roller 218 that each engage three different surfaces of the guide rail 109. In the present configuration, the third roller 218 is a side roller, and the first roller 219 and the second roller 220 are front and rear rollers, as will be appreciated by those skilled in the art. Although a particular configuration is shown in fig. 2 and 3, those skilled in the art will appreciate that the embodiments provided herein are applicable to various other guide arrangement for an elevator car.

Each

roller

218, 219, and 220 is rotatably mounted to the roller guide frame 210 via a support bracket 222,223,224, respectively. Further, a spring mechanism is provided that is configured to provide a restoring force and displacement limit for each roller. The outer races of the rollers contact the guide rails of the elevator system and roll along the guide rail surfaces as the car moves vertically.

With continued reference to fig. 4-7, a guide device according to an embodiment of the invention will be described. A guide device according to an embodiment of the present invention includes: a roller guide frame 210; at least one

roller

218, 219, 220 rotatably mounted to the roller guide frame 210, the at least one

roller

218, 219, 220 configured to roll on an elevator guide rail as the elevator car moves; wherein, guider still includes: a brake that, when activated, inhibits rotation of at least one of the

rollers

218, 219, 220. According to the embodiment of the invention, a braking device is arranged on the elevator guiding device to inhibit the rotation of the roller, thereby inhibiting and reducing the bouncing or the vibration of the elevator car when passengers enter or exit the elevator.

In the illustrated embodiment, the at least one roller includes a first roller 219 and a second roller 220 arranged side by side with a gap G between the first roller 219 and the second roller 220 to accommodate the guide rail, or the first roller 219 and the second roller 220 may also be referred to as a front-to-back roller. In addition, the guide device further comprises a third roller 218, and the third roller 218 is a side roller. As the elevator car travels up and down, the first roller 219 and the second roller 220 roll on the front and rear sides of the guide rail, respectively, and the third roller 218 rolls on the side of the guide rail.

The first roller 219 and the second roller 229 are rotatably mounted on the roller guide frame 210 by brackets 223,224, respectively, similar to those shown in fig. 3, and the third roller 218 is also rotatably mounted on the roller guide frame 210 by bracket 222.

Spring mechanisms

62,63,64 act on each roller to urge each roller toward and into engagement with the guide rail. Although the number and specific arrangement of rollers in the guide are set forth in the illustrated embodiment, other numbers and arrangements of rollers may be provided as appropriate for the circumstances in alternative embodiments.

In the illustrated embodiment, the braking device includes:

brake modules

41,51, pull

wires

32,33 and brake 31. The brake module 41 may, for example, comprise: a friction member 42 switchable between a braking position in which the friction member 42 frictionally acts on the at least one roller 219 to restrain rotation of the at least one roller 219 and a rest position in which the friction member 42 is spaced from the at least one roller 219; the pulling wire 32 is connected between the friction member 42 and the brake 31; the brake 31 is, for example, a device capable of performing a linear displacement, such as an electromagnet, which is capable of pulling the traction wire 32 in order to cause the friction member 42 of the brake module to move from the rest position to the braking position. In the embodiment shown, the friction member 42 rotates, for example, about the pin 44, thereby approaching and contacting the outer race of the at least one roller 219, thereby inhibiting rotation of the at least one roller 219. In addition, a return spring 43 is provided to return the friction member 42 from the braking position to the rest position after the brake releases the friction member 42. In the guide device according to the embodiment of the present invention, the stopper 31 is connected to the brake modules by the pulling

wires

32,33 such that the brake modules are disposed close to the respective rollers, and the stopper 31 having a large volume may be disposed far from the

brake modules

41,51, thereby improving flexibility in arrangement of the brake device. In addition, in the braking apparatus according to the present invention, the brake 31 may be simultaneously used for a plurality of brake modules.

In some embodiments, the braking device comprises: a first brake module 41 acting on the first roller 219 and a second brake module 51 acting on the second roller 220, respectively, which are connected to the same brake 31 by means of

pull wires

32,33, respectively. In some embodiments, both the first roller 219 and the second roller 220 are acted upon simultaneously when the brake is activated. In alternative embodiments, a braking module may be provided that acts only on any one of the first, second and third rollers, or a plurality of braking modules that act on any two or three of them, respectively.

In the embodiment shown in fig. 4 to 7, the friction member acts on the outer ring of the body of the at least one roller, which may be made of a rubber material. In the embodiment shown in fig. 8, the at least one roller 219 may include a roller hub 82, a roller outer race 81 positioned on the hub 82, a roller shaft 83, and a bearing 84. The roller may be rotatably supported on the carriage by bearings 84. In this embodiment, instead of the brake module acting on the outer ring of the roller, the friction of the brake module may also act on the hub 82 of the roller. The roller hub 82 may be made of a metallic material and may be roughened to have a large frictional force with the friction member that inhibits rotation of the roller. Additionally, in the illustrated embodiment, the hub 82 may extend axially beyond the roller outer race 81, thereby facilitating engagement with the friction members of the brake module.

With continued reference to fig. 9, in this embodiment, the at least one roller 219 may include: a roller hub 82, a roller outer race 81 positioned on the hub 82, a roller shaft 83 and bearings 84. The roller shaft 83 may include a portion located on a back side of the bearing 84, and the friction member of the brake module may act on the roller shaft 83 of at least one of the rollers, such as a portion of the roller shaft 83 located on the back side of the bearing 84. Alternatively, an attachment 85 may be fixed to the roller shaft and the friction element of the brake module may act on the attachment 85 on the rotational axis of at least one of the rollers, wherein the attachment 85 and the roller hub 82 are located on either side of the bearing 84.

In another aspect, an elevator system is also provided, comprising: an elevator car; a traction machine for driving the elevator car; and a guide device for an elevator car according to various embodiments connected to the elevator car to guide movement of the elevator car along a guide rail. The hoisting machine can be connected to the car by means of a rope belt integrated with a plurality of ropes, in which case especially a guiding device according to an embodiment of the invention is needed.

In some embodiments, the guiding device for the elevator car further comprises a control device, which is coupled with the braking device and which is configured to activate the braking device when the elevator car stops and to release the braking device before the elevator car starts moving. In some embodiments, the control device is configured to: the braking device is activated after the elevator car has stopped and during opening of the elevator car door, and the braking device is released during closing of the elevator car door and/or when the elevator is in a standby state. Because of the static friction between the rollers of the guide means and the guide rails during the activation of the braking device, it is possible to effectively suppress the movement of the elevator car along the guide rails, thereby ensuring that a person can get on or off the elevator without feeling vibrations in the longitudinal direction of the elevator car during the stopping of the elevator. The control device may be integrated in the elevator system controller or may be a component separate from the elevator system controller, which may be mounted on the guide device and receive a signal from the elevator system controller regarding the start and stop of the elevator and/or opening and closing of the door, thereby determining the activation and release of the brake device, or the control device may be connected to a sensor, such as a car door opening and closing sensor, to receive a signal of the opening and closing of the car door, thereby determining the activation and release of the brake device, or operate in another suitable manner.

The device according to the embodiment of the invention has a simple and compact structure, is suitable for simple modification of existing products, and has lower cost compared with other types of anti-vibration products.

The foregoing description of the specific embodiments has been presented only to illustrate the principles of the invention more clearly, and in which various features are shown or described in detail to facilitate an understanding of the principles of the invention. Various modifications or changes to the invention will be readily apparent to those skilled in the art without departing from the scope of the invention. It is to be understood that such modifications and variations are intended to be included within the scope of the present invention.

Claims

1. A guide device for an elevator car, comprising:

a roller guide frame;

characterized in that, the guider still includes: a braking device that inhibits rotation of the roller when activated.

2. The guide device for an elevator car of claim 1, further comprising a control device coupled with the braking device and configured to activate the braking device when the car is stopped and to release the braking device before the car begins to move.

3. The guide device for an elevator car of claim 2, wherein the control device is configured to: the braking device is activated during the stopping and opening of the elevator car and released during the closing of the car door and during the standby state of the elevator.

4. Guide means for an elevator car according to any one of claims 1-3, characterised in that the braking means comprise:

a pull wire connected to the friction member; and

5. The guide device for an elevator car of claim 4, wherein the at least one roller comprises: a first roller and a second roller arranged side by side with a gap therebetween to accommodate a guide rail, the braking device acting on both the first roller and the second roller simultaneously when activated.

6. The guide device for an elevator car of claim 5, wherein the braking device comprises: the brake device comprises a first brake module acting on a first roller and a second brake module acting on a second roller, wherein the first brake module and the second brake module are connected to the same brake through pull wires respectively.

7. The guide device for an elevator car of claim 4, wherein the friction member acts on an outer race of the at least one roller wheel.

8. The guide device for an elevator car of claim 4, wherein the friction member acts on a hub of the at least one roller.

9. Guide device for an elevator car according to claim 4, characterized in that the friction member acts on the axis of rotation of the at least one roller or on an attachment fixed to the axis of rotation of the at least one roller.

10. An elevator system, comprising:

an elevator car;

the traction machine drives the elevator car to move; and

guide means for an elevator car according to any of claims 1-9 connected to the elevator car to guide movement of the elevator car along guide rails.

11. The elevator system of claim 10, wherein the traction machine is connected to the car by a rope belt integrated with a plurality of ropes.