This application is a 371 U.S. National Stage application of PCT/CN2020/134636, filed Dec. 8, 2020, which claims the benefit to Chinese Application No. 202010362393.6, filed Apr. 30, 2020 and Chinese Application No. 201922256627.4, filed Dec. 16, 2019, all of which are incorporated by reference in their entirety herein.
The present disclosure relates to the field of elevators, and more specifically, the present disclosure relates to a device and a system for keeping the elevator stable when it is parked.
In high-rise buildings, the elevator has a longer traveling distance. When the elevator car is on a low floor, the length of a rope between an elevator car and a tractor becomes longer. This rope will inevitably stretch or shorten when the weight of the passengers in the elevator car changes. Therefore, when passengers enter and exit the elevator, they will feel the springing or vibrating of the elevator car for example caused by the deformation of the rope.
An object of the present disclosure is to solve or at least alleviate the problems existing in the related art.
According to an aspect, a guiding device for an elevator car is provided, which includes:
Optionally, the guiding device for the elevator car further includes a control device, wherein the control device is coupled with the braking device, and the control device is configured to activate the braking device when elevator car is parked and release the braking device before the elevator car starts to move.
Optionally, in the guiding device for the elevator car, the control device is configured to activate the braking device when the elevator car is parked and during the opening of the car door, and release the braking device during the closing of the car door and/or when the elevator is in a standby state.
Optionally, in the guiding device for the elevator car, the braking device includes:
Optionally, in the guiding device for the elevator car, the at least one roller includes a first roller and a second roller arranged side by side, wherein the first roller and the second roller have a gap therebetween to accommodate the guide rail, spring means between the rollers and the guide rail are pre-compressed by certain distances to ensure that the rollers closely abut the working surfaces of the guide rail, and when the braking device is activated, it acts on both the first roller and the second roller at the same time.
Optionally, in the guiding device for the elevator car, the braking device includes a first braking module acting on the first roller and a second braking module acting on the second roller, wherein the first braking module and the second braking module are respectively connected to the same brake via the pull wire.
Optionally, in the guiding device for the elevator car, the friction member acts on an outer ring of a roller body of the at least one roller.
Optionally, in the guiding device for the elevator car, the friction member acts on a hub of the at least one roller.
Optionally, in the guiding device for the elevator car, the friction member acts on a rotating shaft of the at least one roller or an accessory fixed to the rotating shaft of the at least one roller.
According to another aspect, an elevator system is also provided, which includes:
Optionally, the tractor is connected to the elevator car by a rope belt having a plurality of ropes integrated therein.
According to another aspect, an elevator rail clamping device is provided, which includes a roller guide shoe and a braking device installed on the roller guide shoe; the braking device includes a brake, and the brake is set on one side of a guide wheel on the roller guide shoe, the brake pad on the brake is arranged close to the wheel edge of the guide wheel.
Optionally, the brake device further includes a drive mechanism matched with the brake; the brake includes a brake box and the brake pad; the brake pad is curved, and the middle portion of the brake pad is rotatably connected to the brake box, the first end of the brake pad is connected to the drive mechanism, and the second end of the brake pad is arranged close to the wheel edge of the guide wheel.
Optionally, the drive mechanism includes a push-pull electromagnet and a brake wire; the first end of the brake pad is connected to one end of the brake wire, and the other end of the brake wire is connected to the push-pull end of the push-pull electromagnet.
Optionally, the brake further includes a compression spring; the brake pad is placed in the brake box, the first end of the brake pad is connected to one end of the compression spring, and the other end of the compression spring is connected to an inner side wall of the brake box; one end of the brake wire passes through the compression spring and is connected to the first end of the brake pad.
Optionally, the roller guide shoe includes a frame and three guide wheels installed on the frame, and the wheel edges of the three guide wheels are opposite to each other and enclose a clamping channel.
Optionally, the brake includes two brakes, and the two brakes are arranged on one side of two of the guide wheels respectively; the first end of the brake pad in each brake is correspondingly connected to the push-pull end of the push-pull electromagnet by a brake wire.
Optionally, the central axes of the first and second guide wheels are parallel, and the central axis of the third guide wheel is perpendicular to the central axis of the first guide wheel; the two brakes are correspondingly arranged on one side of the first and second guide wheels.
The contents of the present disclosure will become easier to understand with reference to the accompanying drawings. It can be easily understood by those skilled in the art that the drawings are merely used for illustration, and are not intended to limit the scope of protection of the present disclosure. In addition, like parts are denoted by like numerals in the drawings, wherein:
The elevator system controller 115 is positioned within an elevator system controller room 121 of the elevator hoistway 117 as shown, and is configured to control the operation of the elevator system 101, in particular the operation of the elevator car 103. For example, the elevator system controller 115 may provide a driving signal to the tractor 111 to control the acceleration, deceleration, leveling, parking and the like of the elevator car 103. When the elevator car 103 is moving upward or downward in the elevator hoistway 117 along the guide rail 109, the elevator car 103 can be parked at one or more landings 125 under the control of the elevator system controller 115. Although the elevator system controller 115 is shown in the elevator system controller room 121, those skilled in the art will understand that the elevator system controller 115 may be located and/or configured at other positions or locations within the elevator system 101. The tractor 111 may include a motor or a similar drive mechanism.
Although the rope system is illustrated and described, the embodiments of the present disclosure may also be implemented in elevator systems that employ other methods and mechanisms for moving the elevator car within the elevator hoistway.
Turning now to
The guiding devices 202 for the elevator car are each configured to engage with and move along the guide rail 109 (
The respective rollers 218, 219 and 220 are rotatably mounted to the roller guide frame 210 via support brackets 222, 223 and 224, respectively. In addition, spring mechanisms are provided, which are configured to provide a restoring force for each roller and limit their displacements. An outer ring of a roller body of the roller contacts the guide rail of the elevator system and rolls along the surface of the guide rail with the vertical movement of the elevator car.
With continued reference to
In the illustrated embodiment, the at least one roller includes a first roller 219 and a second roller 220 arranged side by side, wherein the first roller 219 and the second roller 220 have a gap G therebetween to accommodate the guide rail, or the first roller 219 and the second roller 220 may also be referred to as front-rear rollers. In addition, the guiding device also includes a third roller 218, which is a lateral roller. When the elevator car is traveling up and down, the first roller 219 and the second roller 220 roll on front and rear surfaces of the guide rail respectively, and the third roller 218 rolls on a side edge of the guide rail.
The first roller 219 and the second roller 229 are rotatably mounted on the roller guide frame 210 through the brackets 223 and 224 similar to those shown in
In the illustrated embodiment, the braking device includes: braking modules 41 and 51, pull wires 32 and 33, and a brake 31. The braking module 41 may include for example a friction member 42 capable of switching between a braking position and an idle position, wherein when the friction member 42 is in the braking position, the friction member 42 acts on at least one roller 219 by friction to inhibit the rotation of the at least one roller 219, and when the friction member 42 is in the idle position, it is separated from the at least one roller 219; the pull wire 32 is connected between the friction member 42 and the brake 31; the brake 31 is, for example, a device capable of performing linear displacement such as an electromagnet, which can pull the pull wire 32 to cause the friction member 42 of the braking module to move from the idle position to the braking position. In the embodiment shown in the drawings, the friction member 42 rotates, for example, around a pin 44 to thereby approach and contact the outer ring of the at least one roller 219, thereby inhibit the 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 idle position after the brake releases the friction member 42. In the guiding device according to the embodiment of the present disclosure, the brake 31 is connected to the braking modules through the pull wires 32 and 33, so that the braking modules are disposed close to each roller, and the brake 31 with a larger volume can be disposed away from the braking modules 41 and 51, thereby increasing the flexibility of the arrangement of the brake. In addition, in the braking device according to the present disclosure, the brake 31 can be used for multiple braking modules at the same time.
In some embodiments, the braking device includes: a first braking module 41 acting on the first roller 219 and a second braking module 51 acting on the second roller 220 respectively, wherein the first braking module and the second braking module are connected to the same brake 31 via the pull wires 32 and 33 respectively. In some embodiments, when the braking device is activated, it acts on both the first roller 219 and the second roller 220 simultaneously. In an alternative embodiment, a braking module that acts only on any one of the first roller, the second roller and the third roller may be provided, or a plurality of braking modules that act on any two or three of them respectively may be provided.
In the embodiments shown in
With continued reference to
According to another aspect, an elevator system is also provided, which includes: an elevator car; a tractor for driving the elevator car; and the guiding device for the elevator car according to various embodiments, which is connected to the elevator car to guide the elevator car to move along a guide rail. The tractor can be connected to the elevator car by a rope belt having a plurality of ropes integrated therein, in which case the guiding device according to the embodiment of the present disclosure is particularly required.
In some embodiments, the guiding device for the elevator car further includes: a control device, which is coupled with the braking device, and which is configured to activate the braking device when the elevator car is parked, and to release the braking device before the elevator car starts to move. In some embodiments, the control device is configured to activate the braking device after the elevator car is parked and during the opening of the door of the elevator car, and to release the braking device during the closing of the door of the elevator car and/or when the elevator is in a standby state. During the activation of the braking device, there is static friction between the rollers of the guiding device and the guide rail, which can effectively inhibit the movement of the elevator car along the guide rail, thereby ensuring that people will not feel the vibration of the elevator car in the longitudinal direction when entering or exiting the elevator if the elevator is parked. The control device may be integrated in the elevator system controller or may be a component separate from the elevator system controller, and may be mounted on the guiding device and accepts a signal sent 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 braking device. Alternatively, the control device may be connected to a sensor, such as a car door opening and closing sensor, to receive the opening and closing signal of the car door, thereby determining the activation and release of the braking device. Alternatively, the control device may be operated in other suitable ways.
The device according to the embodiment of the present disclosure has a simple and compact structure, is suitable for simple modification of existing products, and has a lower cost than other types of anti-vibration products.
Further referring to
The roller guide shoe is installed on an elevator car and it includes a frame 210′ and three guide wheels mounted on the frame 210′. The three guide wheels are all guide wheels for orientation, the sides of which are opposed to each other and enclose a clamping channel G. The central shaft of each guide wheel is connected to one end of the support brackets 222′, and the other end of the support brackets 222′ are against the springs 62′, 63′. When the elevator guide rail 119′ is placed in the channel G, the wheel edges of the three guide wheels are contacting the side wall of the guide rail 119′ and the roller guide shoe thus is used to guide the car along the guide rail 119′ of the elevator, ensuring the stability of the lifting movement of the car.
In this embodiment, the brake device is integrated on the existing roller guide shoe, and the brake pad 42′, 52′ of the brake device brakes the guide wheel 219′, 220′ on the roller guide shoe. When the elevator car moves up and down along the guide rail 119′, only the guide wheels are in rolling connection with the surface of the guide rail 119′, and the brake devices are separated from the guide rail 119′. When the car stops, only the brake pads 42′, 52′ of the brake device stop the rotation of the guide wheel. ensuring the stability of the car during parking and stopping of the car. This will not cause damage to the surface of the guide rail 119′. At the same time, since the brake device is integrated with the roller guide shoe, the installation space is greatly saved. When the brake device is regularly maintained, it is only necessary to directly remove the roller guide shoe from the car for maintenance operations. Therefore, the brake device also has the characteristics of convenient disassembly and subsequent replacement and maintenance.
Furthermore, the brake device in one embodiment also includes a drive mechanism that matches the brake 41′, 51′. Referring to
In one embodiment, the brake 41′, 51′ may be arranged on one side of at least one guide wheel on the roller guide shoe, so as to stop the rotation of the guide wheel when the car is stopped. When the brake 41′, 51′ brakes the guide wheel, the first end of the brake pad 42′ is driven by the drive mechanism, so that the brake pad 41′, 51′ rotates along its middle portion, so that the second end of the brake pad 41′, 51′ is in contact with the side of the guide wheel, thereby prevent the guide wheel from further rotating. When it does not need to brake the guide wheel, the drive mechanism only needs to leave the brake 41′, 51′ to rotate in the opposite direction, so that the second end of the brake pad 42′ is separated from the egde of the guide wheel.
Furthermore, in order to facilitate the control of the rotation of the brake pad by the drive mechanism, the shape of the brake pad may be of a “7” shape, and the drive mechanism may be a telescopic mechanism or a rotating mechanism without limitation. The telescopic end of the telescopic mechanism is connected to the first end of the brake pad or the output end of the rotating mechanism is connected to the first end of the brake pad through a cam so as to control the rotation of the brake pad 42′.
Furthermore, the drive mechanism in one embodiment includes a push-pull electromagnet 31′ and a brake wire 32; the first end of the brake pad 42′ is connected to one end of the brake wire 32′, and the other end of the brake wire 32′ is connected to the push-pull end of the push-pull electromagnet 31′.
When the brake 41′, 51′ is about to brake the guide wheel, the push-pull electromagnet 31′ is energized, the push-pull end retracts, and the first end of the brake pad 42′ is pulled by the brake wire 32′, so that the second of the brake pad 42′ is contacting the edge of the guide wheel to achieve braking.
As the brake wire 32′ is shapeable rigid cable, it can be adapted to different installation structures. The push-pull action of the push-pull electromagnet 31′ can be realized by the control of power transmission, so that the brake device formed by the push-pull electromagnet 31′, the brake wire 32′ and the brake 41′, 51′ can be applied to roller guide shoes of different sizes with low cost and easy integrated installation.
Furthermore, referring to
Moreover, by providing a compression spring 43′ between the first end of the brake pad 42′ and the inner wall of the brake box 44′, when it does not need to brake the guide wheel, i.e. when the push-pull electromagnet 31′ does not exert a pulling force to the first end of the brake pad 42′ by the brake wire 32′, the compression spring 73 will recover, and thereby exert a thrust on the first end of the brake pad 42′, so that the brake pad 42′ rotates in an opposite direction along its middle portion, then the second end of the brake pad 42′ is separated from the edge of the guide wheel.
Furthermore, in order to control the stability of the car during parking, two brakes 41′, 51′ are provided in one embodiment, and the two brakes 41′, 51′ are provided on one side of the two guide wheels respectively. The first end of each the brake pad 42′ is connected to the push-pull electromagnet 31′ through the brake wires 32′.
Moreover, the center axis of the first guide wheel and the second guide wheel may be parallel to each other, and the center axis of the third guide wheel may be perpendicular to the center axis of the first guide wheel.
Moreover, the two brakes 41′, 51′ are correspondingly arranged on one side of the first guide wheel and the second guide wheel, and the push-pull electromagnet 31′ is installed on the corresponding side of the third guide wheel on the frame, such that the integrated installation of the roller guide shoe and the brake device is thus realized. The push-pull electromagnet 31′ can drive the two brakes 41′, 51′ simultaneously, and synchronous brake control of the first guide wheel and the second guide wheel can be realized. The operation is simple, convenient, stable and reliable.
The specific embodiments described above are merely for describing the principle of the present disclosure more clearly, and various components are clearly illustrated or depicted to make it easier to understand the principle of the present disclosure. Those skilled in the art can readily make various modifications or changes to the present disclosure without departing from the scope of the present disclosure. Therefore, it should be understood that these modifications or changes should be included within the scope of protection of the present disclosure.
Number | Date | Country | Kind |
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201922256627.4 | Dec 2019 | CN | national |
202010362393.6 | Apr 2020 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2020/134636 | 12/8/2020 | WO |
Publishing Document | Publishing Date | Country | Kind |
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WO2021/121084 | 6/24/2021 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
1854976 | Brady | Apr 1932 | A |
3783978 | Hamilton | Jan 1974 | A |
5117946 | Traktovenko | Jun 1992 | A |
5632358 | Maeda | May 1997 | A |
5950771 | Ferrisi | Sep 1999 | A |
6474449 | Utsunomiya | Nov 2002 | B1 |
RE38835 | Sevilleja | Oct 2005 | E |
7398863 | Liebetrau | Jul 2008 | B2 |
8011478 | Utsunomiya | Sep 2011 | B2 |
8869946 | Okada | Oct 2014 | B2 |
9862569 | Vlasov | Jan 2018 | B2 |
10214382 | Wei | Feb 2019 | B2 |
10215242 | Polack | Feb 2019 | B2 |
20090032340 | Smith | Feb 2009 | A1 |
20090308697 | Boschin | Dec 2009 | A1 |
20110272223 | Drayer | Nov 2011 | A1 |
20150291392 | Steiner | Oct 2015 | A1 |
20170355563 | Zimmerli | Dec 2017 | A1 |
20220135374 | Li | May 2022 | A1 |
20220402728 | Li | Dec 2022 | A1 |
20230047079 | Duvall | Feb 2023 | A1 |
Number | Date | Country |
---|---|---|
2003104655 | Apr 2003 | JP |
2005126163 | May 2005 | JP |
2006264852 | Oct 2006 | JP |
2009208914 | Sep 2009 | JP |
Entry |
---|
JP2009208914—Machine Translation (Year: 2009). |
2005126163—Machine translation (Year: 2005). |
International Search Report for Application No. PCT/CN2020/134636; dated Apr. 1, 2021; 4 Pages. |
Written Opinion for Application No. PCT/CN2020/134636; dated Apr. 1, 2021; 6 Pages. |
Number | Date | Country | |
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20220402728 A1 | Dec 2022 | US |