CN210150538U - Speed limit protection device and elevator - Google Patents
Speed limit protection device and elevator Download PDFInfo
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- CN210150538U CN210150538U CN201920922971.XU CN201920922971U CN210150538U CN 210150538 U CN210150538 U CN 210150538U CN 201920922971 U CN201920922971 U CN 201920922971U CN 210150538 U CN210150538 U CN 210150538U
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- wheel
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- 238000005119 centrifugation Methods 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
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Abstract
The utility model discloses a speed limit protection device, elevator, it includes: the speed limiting wheel mechanism, the trigger mechanism and the safety gear; the speed limiting wheel mechanism comprises: a speed limiting wheel which is contacted with the guide rail and rotates along with the upward and downward movement of the car; the centrifugal connecting piece is rotationally connected with the speed limiting wheel and is provided with a braking end and a centrifugal end, the braking end is connected with the braking wheel, and the centrifugal end is connected with the centrifugal block; the trigger mechanism includes: a friction wheel arranged coaxially with the speed limiting wheel; one end of the ejector rod is arranged on the friction wheel, and the other end of the ejector rod is in driving connection with the safety gear; when the car is overspeed and is descended, the brake wheel locks the friction wheel, so that the speed limiting wheel and the friction wheel rotate synchronously to trigger the safety tongs to brake the car. The utility model discloses simple structure, response time is short, and can remove wire rope and overspeed device tensioner's setting from, improves the utilization ratio of well.
Description
Technical Field
The utility model relates to an elevator safety technical field, in particular to speed limit protection device, elevator.
Background
An elevator speed limiter in the prior art is generally provided with a set of speed limiter on a machine room, a steel wire rope is placed on speed limiter wheels, the steel wire rope penetrates through a whole hoistway, a tensioning device is arranged at the bottom of the hoistway to tension the steel wire rope, the tensioning device provides positive pressure of the steel wire rope and the speed limiter wheels to guarantee friction force, and the steel wire rope is connected to a lifting rod of an upper cross beam to form a closed loop and synchronously run with a car. When the car runs at an overspeed, the trigger action of the speed limiter stops the speed limiter wheel, and the lifting rod of the upper cross beam is lifted through the steel wire rope, so that the safety tongs are triggered to act to stop the car, and a safety protection system for limiting the speed is formed.
However, the elevator speed limiter in the prior art needs a certain time from triggering to braking action, and the response is delayed, so that the elevator is braked after running for a certain distance, and the problem of delayed response exists. And wire rope can have the pendulum condition of shaking in the use, and wire rope frequently scrapes the outer wall production of elevator car, can make elevator car be impaired easily outward, still can influence the cooperation effect of wire rope and overspeed governor wheel. In addition, the elevator overspeed governor still needs to set up overspeed device tensioner in the well bottom to control wire rope's tensile force, and overspeed device tensioner occupies well space and influences well arrangement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a speed limit protection device, this speed limit protection device simple structure, response time is short, improves the utilization ratio of well.
In order to realize the purpose, the technical scheme of the utility model is that:
a speed-limiting protection device, comprising: the speed limiting wheel mechanism, the trigger mechanism and the safety gear; the speed limiting wheel mechanism comprises: a speed limiting wheel which is contacted with the guide rail and rotates along with the upward and downward movement of the car; the centrifugal connecting piece is rotationally connected with the speed limiting wheel and is provided with a braking end and a centrifugal end, the braking end is connected with the braking wheel, and the centrifugal end is connected with the centrifugal block; the trigger mechanism includes: a friction wheel arranged coaxially with the speed limiting wheel; one end of the ejector rod is arranged on the friction wheel, and the other end of the ejector rod is in driving connection with the safety gear; when the car is overspeed and is descended, the brake wheel locks the friction wheel, so that the speed limiting wheel and the friction wheel rotate synchronously to trigger the safety tongs to brake the car.
Compared with the prior art, the speed-limiting protection device with the structure has the advantages that the speed-limiting wheel rotates along with the running of the car, corresponding steel wire ropes and tensioning devices do not need to be arranged as in the prior art, the utilization rate of a well is improved, the centrifugal block performs centrifugal motion when the car goes down at an overspeed, the brake wheel is in contact with the friction wheel and is locked, the friction wheel rotates synchronously with the speed-limiting wheel under the action of the brake wheel, the ejector rod triggers the safety tongs to work, the response time is short, the car can be stopped in a short time, and the safety of passengers is guaranteed.
Furthermore, a first through hole is formed in the speed limiting wheel; the centrifugal connecting piece is also provided with a first brake wheel connecting piece, a second brake wheel connecting piece and a rotating end arranged close to the brake end; one end of the first brake wheel connecting piece is connected with the rotating end, and the other end of the first brake wheel connecting piece penetrates through the first through hole to be connected with the brake wheel; one end of the second brake wheel connecting piece is connected with the brake end, and the other end of the second brake wheel connecting piece is connected with the brake wheel.
Furthermore, the speed limiting wheel mechanism further comprises an elastic connecting piece, one end of the elastic connecting piece is fixedly connected with the speed limiting wheel, and the other end of the elastic connecting piece is connected with the brake end.
Further, this speed limit protection device still includes auxiliary wheel mechanism, and it includes: the supporting base is connected with the safety gear; the auxiliary wheel is arranged on the supporting base, is contacted with the guide rail and rotates along with the upward and downward movement of the lift car; and the upper end of the speed limiting wheel connecting piece is rotationally connected with the supporting base, and the lower end of the speed limiting wheel connecting piece is connected with the speed limiting wheel.
Further, the auxiliary wheel mechanism further comprises a speed limiting wheel adjusting piece which is connected with the middle end of the speed limiting wheel connecting piece so as to change the distance between the speed limiting wheel and the guide rail.
Furthermore, the auxiliary wheel mechanism also comprises an auxiliary wheel connecting piece and an auxiliary wheel adjusting piece; the upper end of the auxiliary wheel connecting piece is rotatably connected with the supporting base, and the lower end of the auxiliary wheel connecting piece is connected with the auxiliary wheel; the auxiliary wheel adjusting piece is connected with the middle end of the speed limiting wheel connecting piece so as to change the distance between the auxiliary wheel and the guide rail.
Further, the speed-limiting protection device also comprises a detection mechanism, which comprises: the mounting fixing plate is connected with the speed limiting wheel connecting piece; the detection switch is used for generating an overspeed signal, is arranged on the mounting fixing plate and is in communication connection with an elevator control system; the trigger rod is used for triggering the detection switch to work and is rotationally connected with the mounting fixing plate, and the trigger rod comprises a first trigger end and a second trigger end; when the car exceeds the speed limit and descends, the centrifugal block is in contact with the first trigger end, so that the second trigger end is in contact with the detection switch and triggers the detection switch to work.
As a specific embodiment, the speed limiting wheel mechanism comprises two centrifugal connecting pieces, and the two centrifugal connecting pieces are connected through a connecting rod.
The utility model also provides an elevator, it includes foretell speed limit protection device.
For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the speed limiting protection apparatus of the present invention;
FIG. 2 is a schematic view of the speed-limiting protection device of the present invention during normal operation of the car;
FIG. 3 is a schematic diagram of the speed-limiting protection device of the present invention when the car is descending at an overspeed;
FIG. 4 is a schematic diagram of the speed-limiting protection device of the present invention when the car is descending at an overspeed;
FIG. 5 is a schematic view of a first embodiment of a speed limiting mechanism of the present invention;
fig. 6 is a schematic view of the triggering mechanism of the present invention;
FIG. 7 is a schematic view of an auxiliary wheel mechanism of the present invention;
fig. 8 is a schematic view of a second embodiment of the speed limiting mechanism of the present invention.
[ reference numerals ]
100 speed limiting wheel mechanism 110 speed limiting wheel 120 centrifugal connector
121 brake end 122 brake wheel
123 centrifugal end 124 centrifugal block
125 first brake wheel attachment member 126 second brake wheel attachment member
127 pivoting end 128 resilient coupling
129 connecting rod
200 trigger mechanism 210 friction wheel 220 push rod
230 return spring
300 auxiliary wheel mechanism 310 supports base 320 auxiliary wheel
331 speed-limiting wheel connecting piece 332 speed-limiting wheel adjusting piece
321 auxiliary wheel connecting piece 322 auxiliary wheel adjusting piece
400 detection mechanism 410 is installed fixed plate 420 and is detected switch
430 trigger lever
500 safety gear 600 guide rail
Detailed Description
In order to fully understand the objects, features and effects of the present invention, the conception, specific structure and technical effects of the present invention will be further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 7, a speed limit protection device includes: the speed limiting wheel mechanism 100, the trigger mechanism 200 and the safety gear 500; the speed limit wheel mechanism 100 includes: a speed limit wheel 110 which is in contact with the guide rail 600 and rotates as the car goes up and down; the centrifugal connecting piece 120 is rotatably connected with the speed limiting wheel 110 and is provided with a braking end 121 and a centrifugal end 123, the braking end 121 is connected with the braking wheel 122, and the centrifugal end 123 is connected with the centrifugal block 124; the trigger mechanism 200 includes: a friction wheel 210 disposed coaxially with the speed limit wheel 110; one end of the push rod 220 is arranged on the friction wheel 210, and the other end of the push rod is in driving connection with the safety gear 500; when the car descends at an overspeed, the brake wheel 122 locks the friction wheel 210, so that the speed limiting wheel 332 and the friction wheel 210 rotate synchronously to trigger the safety gear 500 to brake the car.
Specifically, the safety gear is arranged on the car and used for braking the car. As shown in fig. 2, when the car normally runs, the speed limiting wheel rotates along with the upward and downward movement of the car, and the friction wheel arranged coaxially with the speed limiting wheel does not rotate; as shown in fig. 3, when the car is overspeed and is descended, the rotational speed of speed limit wheel can accelerate, leads to the centrifugal piece to outwards move because of centrifugal force, makes centrifugal piece rotates, orders about the brake pulley is to the direction motion of friction pulley, and locks the friction pulley, as shown in fig. 4, the back is locked to the friction pulley, with speed limit wheel synchronous rotation orders about the ejector pin rises, when triggering the voussoir upward movement in the safety tongs, the voussoir presss from both sides tight well guide rail, stops to the car. It should be noted that, the safety gear may be a safety gear known in the art, and the present invention is not limited thereto.
Compared with the prior art, the speed-limiting protection device with the structure has the advantages that the speed-limiting wheel rotates along with the running of the car, corresponding steel wire ropes and tensioning devices do not need to be arranged as in the prior art, the utilization rate of a well is improved, the centrifugal block performs centrifugal motion when the car goes down at an overspeed, the brake wheel is in contact with the friction wheel and is locked, the friction wheel rotates synchronously with the speed-limiting wheel under the action of the brake wheel, the ejector rod triggers the safety tongs to work, the response time is short, the car can be stopped in a short time, and the safety of passengers is guaranteed.
Preferably, the speed limiting wheel mechanism comprises at least one centrifugal piece, at least one brake wheel and at least one centrifugal block, wherein the centrifugal piece, the brake wheel and the centrifugal block are matched in number. Through setting up a plurality of centrifugation pieces, brake wheel and centrifugation piece, can ensure that the car can obtain the brake when speeding down, prevent to lose efficacy because of the brake that single centrifugation piece work and damage often arouse, guarantee passenger's safety better.
Preferably, the surface of friction pulley is equipped with striae, cross line or raised grain to increase the frictional force of friction pulley, make the brake wheel can lock the friction pulley better when the car hypervelocity, also adopt the technology that increases coefficient of friction to handle, the utility model discloses do not restrict this.
As shown in fig. 5, further, a first through hole is formed on the speed limiting wheel 110; the centrifugal connecting piece 120 is further provided with a first brake wheel connecting piece 125, a second brake wheel connecting piece 126 and a rotating end 127 arranged close to the brake end; one end of the first brake wheel connecting piece 125 is connected with the rotating end 127, and the other end passes through the first through hole to be connected with the brake wheel 122; one end of the second brake wheel connecting piece 126 is connected with the brake end 121, and the other end is connected with the brake wheel 122. Specifically, through setting up first brake wheel connecting piece for the brake wheel can wind the axle at first brake wheel connecting piece place rotates, through setting up second brake wheel connecting piece moreover, makes on the brake wheel and have two tie points between the centrifugal connection spare, can prevent that the brake wheel from damaging and leading to car brake inefficacy at the locking in-process.
As shown in fig. 2 to 4, the speed limiting wheel mechanism 100 further includes an elastic connecting member 128, one end of which is fixedly connected to the speed limiting wheel 110, and the other end of which is connected to the brake end 121. Specifically, after the problem of the car is solved, when the speed-limiting protection device needs to be reset, the car is controlled to overhaul for a short distance, the speed-limiting wheel and the friction wheel rotate in opposite directions, so that the brake wheel moves outwards under the elastic acting force of the elastic connecting piece, the reset of the brake wheel is completed, and the speed-limiting protection device can be reused.
Preferably, as shown in fig. 6, a return spring 230 is arranged on the top rod 220, and provides a holding force for the top rod when the car is in normal operation, so as to prevent false triggering of the top rod caused by over-acceleration of the elevator motor; meanwhile, the return spring also provides a downward acting force for the downward return of the ejector rod when the speed-limiting protection device is returned.
As shown in fig. 7, further, the speed-limiting protection device further includes an auxiliary wheel mechanism 300, which includes: a support base 310 connected with the safety gear 500; the auxiliary wheel 320 is arranged on the supporting base, is contacted with the guide rail 600, rotates along with the upward and downward movement of the car, is contacted and pressed on the guide rail through the auxiliary wheel and has a guiding effect on the running of the car in the vertical direction; the upper end of the speed wheel connector 332 is rotatably connected to the support base 310, and the lower end thereof is connected to the speed wheel 110.
Wherein, the auxiliary wheel mechanism 300 further includes a speed limiting wheel adjuster 332 connected to the middle end of the speed limiting wheel connector 331 to change the distance between the speed limiting wheel 110 and the guide rail 600. Specifically, the speed limiting wheel adjusting part comprises a first connecting rod connected with the speed limiting wheel connecting part, and a first pressure spring and a first locking nut which are sleeved on the first connecting rod; one end of the first pressure spring is in contact with the speed limiting wheel connecting piece, the other end of the first pressure spring is in contact with the first locking nut, and the expansion amount of the first pressure spring is changed by screwing or unscrewing the first locking nut, so that the speed limiting wheel connecting piece is close to or far away from the guide rail, the distance between the guide rail and the speed limiting wheel is changed, and the friction force between the speed limiting wheel and the guide rail is guaranteed.
As shown in fig. 7, further, the auxiliary wheel mechanism 300 further includes an auxiliary wheel connecting member 321 and an auxiliary wheel adjusting member 322; the upper end of the auxiliary wheel connecting piece 321 is rotatably connected with the supporting base 310, and the lower end is connected with the auxiliary wheel 320; the auxiliary wheel adjuster 322 is coupled to the middle end of the speed wheel coupling 321 to change the distance between the auxiliary wheel 320 and the guide rail 600. Specifically, the auxiliary wheel adjusting part comprises a second connecting rod connected with the auxiliary wheel connecting part, and a second pressure spring and a second locking nut which are sleeved on the first connecting rod; one end of the second pressure spring is in contact with the auxiliary wheel connecting piece, the other end of the second pressure spring is in contact with the second locking nut, and the second locking nut is screwed or unscrewed to change the expansion amount of the second pressure spring, so that the auxiliary wheel connecting piece is close to or far away from the guide rail, the distance between the guide rail and the auxiliary wheel is changed, and the friction force between the auxiliary wheel and the guide rail is ensured.
As shown in fig. 2 to 4, further, the speed-limiting protection device further includes a detection mechanism 400, which includes: a mounting fixing plate 410 connected to the speed-limiting wheel link 331; a detecting switch 420 for generating an overspeed signal, which is disposed on the mounting fixing plate 410 and is in communication connection with an elevator control system; a trigger rod 430 for triggering the operation of the detection switch, which is rotatably connected to the mounting fixing plate 410, wherein the trigger rod 430 includes a first trigger end and a second trigger end; when the car descends at an overspeed, the centrifugal block 124 is in contact with the first trigger end, so that the second trigger end is in contact with the detection switch and triggers the detection switch to work.
Specifically, as shown in fig. 3, when the car exceeds speed and descends, the centrifugal block moves outwards due to centrifugal force, and contacts and pushes the first trigger end of the trigger rod to move outwards, because the first trigger end is connected with the installation fixing part in a rotating manner, the second trigger end moves inwards and contacts with the detection switch, and the detection switch is triggered to generate an overspeed signal and is transmitted to the elevator control system, so that the relevant staff in charge of elevator operation can know that the car exceeds speed and descends in time, and accordingly corresponding operation can be performed.
Preferably, detection mechanism still includes an extension spring, the one end of this extension spring with installation fixed part fixed connection, the other end with the second trigger end is connected, so that for the reset of trigger lever provides the effort. Wherein, the detection switch can be electromagnetic type detection switch, and the staff can make detection switch reset through the inching switch, can also adopt other known modes in this field to handle, the utility model discloses do not restrict this.
Example 2
The present embodiment is basically the same as the embodiment 1, and the main difference is that:
as shown in fig. 8, the speed-limiting wheel mechanism includes two centrifugal connectors 120, the two centrifugal connectors 120 are connected by a connecting rod 129, and the connecting rod connects the two centrifugal connectors, so as to ensure that the centrifugal connectors work synchronously and ensure that the two brake wheels and the friction wheel lock the friction wheel synchronously.
The utility model also provides an elevator, it includes foretell speed limit protection device.
The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.
Claims (9)
1. A speed-limiting protection device, comprising:
the speed limiting wheel mechanism, the trigger mechanism and the safety gear;
the speed limiting wheel mechanism comprises:
a speed limiting wheel which is contacted with the guide rail and rotates along with the upward and downward movement of the car;
the centrifugal connecting piece is rotationally connected with the speed limiting wheel and is provided with a braking end and a centrifugal end, the braking end is connected with the braking wheel, and the centrifugal end is connected with the centrifugal block;
the trigger mechanism includes:
a friction wheel arranged coaxially with the speed limiting wheel;
one end of the ejector rod is arranged on the friction wheel, and the other end of the ejector rod is in driving connection with the safety gear;
when the car is overspeed and is descended, the brake wheel locks the friction wheel, so that the speed limiting wheel and the friction wheel rotate synchronously to trigger the safety tongs to brake the car.
2. The speed limit protection device of claim 1, characterized in that:
the speed limiting wheel is provided with a first through hole;
the centrifugal connecting piece is also provided with a first brake wheel connecting piece, a second brake wheel connecting piece and a rotating end arranged close to the brake end;
one end of the first brake wheel connecting piece is connected with the rotating end, and the other end of the first brake wheel connecting piece penetrates through the first through hole to be connected with the brake wheel;
one end of the second brake wheel connecting piece is connected with the brake end, and the other end of the second brake wheel connecting piece is connected with the brake wheel.
3. The speed limit protection device of claim 1, characterized in that:
the speed limiting wheel mechanism further comprises an elastic connecting piece, one end of the elastic connecting piece is fixedly connected with the speed limiting wheel, and the other end of the elastic connecting piece is connected with the brake end.
4. The speed limit protection device of claim 1, characterized in that:
this speed limit protection device is still including auxiliary wheel mechanism, and it includes:
the supporting base is connected with the safety gear;
the auxiliary wheel is arranged on the supporting base, is contacted with the guide rail and rotates along with the upward and downward movement of the lift car;
and the upper end of the speed limiting wheel connecting piece is rotationally connected with the supporting base, and the lower end of the speed limiting wheel connecting piece is connected with the speed limiting wheel.
5. The speed limit protection device of claim 4, wherein:
the auxiliary wheel mechanism further comprises a speed limiting wheel adjusting piece which is connected with the middle end of the speed limiting wheel connecting piece so as to change the distance between the speed limiting wheel and the guide rail.
6. The speed limit protection device of claim 4, wherein:
the auxiliary wheel mechanism also comprises an auxiliary wheel connecting piece and an auxiliary wheel adjusting piece;
the upper end of the auxiliary wheel connecting piece is rotatably connected with the supporting base, and the lower end of the auxiliary wheel connecting piece is connected with the auxiliary wheel;
the auxiliary wheel adjusting piece is connected with the middle end of the speed limiting wheel connecting piece so as to change the distance between the auxiliary wheel and the guide rail.
7. The speed limit protection device of claim 4, wherein:
this speed limit protection device is still including detection mechanism, and it includes:
the mounting fixing plate is connected with the speed limiting wheel connecting piece;
the detection switch is used for generating an overspeed signal, is arranged on the mounting fixing plate and is in communication connection with an elevator control system;
the trigger rod is used for triggering the detection switch to work and is rotationally connected with the mounting fixing plate, and the trigger rod comprises a first trigger end and a second trigger end;
when the car exceeds the speed limit and descends, the centrifugal block is in contact with the first trigger end, so that the second trigger end is in contact with the detection switch and triggers the detection switch to work.
8. The speed limit protection device of claim 1, characterized in that:
the speed limiting wheel mechanism comprises two centrifugal connecting pieces, and the two centrifugal connecting pieces are connected through a connecting rod.
9. An elevator characterized by comprising the speed limit protection device of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920922971.XU CN210150538U (en) | 2019-06-18 | 2019-06-18 | Speed limit protection device and elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920922971.XU CN210150538U (en) | 2019-06-18 | 2019-06-18 | Speed limit protection device and elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210150538U true CN210150538U (en) | 2020-03-17 |
Family
ID=69763418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920922971.XU Withdrawn - After Issue CN210150538U (en) | 2019-06-18 | 2019-06-18 | Speed limit protection device and elevator |
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| Country | Link |
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| CN (1) | CN210150538U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110182665A (en) * | 2019-06-18 | 2019-08-30 | 广州广日电梯工业有限公司 | A kind of speed-limiting protective device, elevator and its method |
| CN113184711A (en) * | 2021-05-20 | 2021-07-30 | 浙江大力神路桥建设有限公司 | Assembled building accessory hoist and mount protection device |
-
2019
- 2019-06-18 CN CN201920922971.XU patent/CN210150538U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110182665A (en) * | 2019-06-18 | 2019-08-30 | 广州广日电梯工业有限公司 | A kind of speed-limiting protective device, elevator and its method |
| CN110182665B (en) * | 2019-06-18 | 2024-04-02 | 广州广日电梯工业有限公司 | Speed limiting protection device, elevator and method thereof |
| CN113184711A (en) * | 2021-05-20 | 2021-07-30 | 浙江大力神路桥建设有限公司 | Assembled building accessory hoist and mount protection device |
| CN113184711B (en) * | 2021-05-20 | 2024-04-19 | 浙江大力神路桥建设有限公司 | Assembled building accessory hoist and mount protection device |
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