CN202529673U - Gravity eccentric shaft type safety tongs - Google Patents
Gravity eccentric shaft type safety tongs Download PDFInfo
- Publication number
- CN202529673U CN202529673U CN2012202035891U CN201220203589U CN202529673U CN 202529673 U CN202529673 U CN 202529673U CN 2012202035891 U CN2012202035891 U CN 2012202035891U CN 201220203589 U CN201220203589 U CN 201220203589U CN 202529673 U CN202529673 U CN 202529673U
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- CN
- China
- Prior art keywords
- eccentric
- fixture block
- clamp splice
- safety
- safety tongs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
The utility model relates to safety tongs, and in particular relates to gravity eccentric shaft type safety tongs. The technical scheme is as follows: pull couple of a balance weight block on an eccentric clamp splice is greater than that of a tension spring because of the gravity, and the eccentric clamp splice is contacted with the lower end of a hinge base when an elevator normally operates, so that the safety tongs are in a non-action state, and a certain gap is reserved between the eccentric clamp splice and a sliding clamp splice of a brake element as well as a guide rail; when descending acceleration of a lift car reaches a limit value, the gravity of the balance weight block is reduced to rotate the eccentric clamp splice and enable a tong opening to be close to a rail; the eccentric clamp splice moves downwards along with the lift car, the eccentric clamp splice forces the descending elevator to be decelerated under a common action of friction force and the tension spring until the elevator stops; a safety switch contacted with the clamp splice is opened to disconnect a control circuit, the motor of the elevator is forced to stop operation; and after all safety switches reset, the safety tongs can be released when the lift car is lifted upwards. The gravity eccentric shaft type safety tongs have the beneficial effects that the safety tong has a simple structure and is particularly suitable for safety control of home elevators.
Description
Technical field
The utility model relates to a kind of safety tongs, particularly relates to a kind of vertical-lift elevator and uses the gravity type boat davit safety tongs.
Background technology
Existing safety tongs principle of work is: the fag end at speed limit rope two ends is connected with the drive link of safety tongs lever.When elevator normally moved, car movement drove governor rope and velocity limiter motion through drive link, and at this moment, safety tongs is in non-action status, keeps certain clearance between its braking element and the guide rail.When the car hypervelocity reached limit value, the velocity limiter action made the folder rope clamp live governor rope, so along with car continues to move downward, governor rope is mentioned drive link and impelled the push and pull system interlock, the raising rod of both sides is mentioned simultaneously.Drive safety tongs braking voussoir and contact with guide rail, two safety tongss are clamped on the guide rail simultaneously, and it is descending that car is stopped.The safety tongs complex structure of this structure, the bodily form is big, and is relatively poor for the little elevator practicality that resembles family expenses; Because parts are many, and the probability of et out of order is big, the major accident that causes is shown in various medium repeatly because elevator falls rapidly in recent years in addition.
Summary of the invention
In order to overcome above-mentioned shortcoming, the utility model provides a kind of gravity eccentric shaft type safety tongs.
The utility model is to be made up of clump weight, hauling rope, slip fixture block, eccentric fixture block, track adjusting wheel, key, eccentric shaft, free bearing, extension spring, pulling force adjustable bolt and safety switch; It is characterized in that: clump weight is fixed in the lower end of hauling rope, and the other end of hauling rope is fixed through track adjusting wheel and eccentric fixture block; The eccentric part hinge of slip fixture block and eccentric shaft connects; Eccentric shaft and eccentric fixture block key joint; The two ends and the free bearing of eccentric shaft are hinged; One end of extension spring is linked in eccentric fixture block through the pulling force adjustable bolt, and the other end is fixed on the lift car; Free bearing is fixed on the lift car; Safety switch is fixed on the lift car, and its throw rod contacts with slip fixture block afterbody.
The utility model solves the technical scheme that its technical matters adopted: when elevator normally moves; Clump weight is even greater than the pulling force of extension spring to the pulling force idol of eccentric fixture block because of gravity; End in contact under eccentric fixture block and the free bearing; At this moment, safety tongs is in non-action status, keeps certain clearance between the eccentric fixture block of its braking element and slip fixture block and the guide rail.When the descending acceleration/accel of car reached limit value, ballasted weight reduced; Clump weight is even less than the pulling force of extension spring to the pulling force idol of eccentric fixture block because of gravity; Make the rotation of eccentric fixture block, jaw to track near; Because of eccentric fixture block and eccentric shaft key joint, eccentric shaft rotate to drive the slip clamp piece to track near, the fixture block up to the track both sides contact generation and rubs with track.Along with car continues to move downward, eccentric fixture block is rotated further and drives the slip fixture block further near, the fixture block of both sides track being produced bigger friction force under the combined action of friction force and extension spring, force descending deceleration of elevator, stops until elevator.The safety switch that contacts with the fixture block simultaneously disconnection control circuit that is opened forces the motor of elevator out of service.Have only all safety switchs of working as to reset, when car is upwards mentioned, could discharge safety tongs.
The invention has the beneficial effects as follows, simple in structure, be particularly suitable for the safety control of home lift.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is structure and the component locations scheme drawing of the utility model when elevator normally moves.
Fig. 2 is that the utility model loses structure and component locations scheme drawing after controller falls at elevator.
1 clump weight among the figure, 2 hauling ropes, 3 slip fixture blocks, 4 eccentric fixture blocks, 5 track adjusting wheels, 6 eccentric shafts, 7 tracks, 8 keys, 9 free bearings, 10 extension springs, 11 pulling force adjustable bolts, 12 safety switchs, 13 lift cars.
The specific embodiment
As can beappreciated from fig. 1, the utility model is to be made up of clump weight 1, hauling rope 2, slip fixture block 3, eccentric fixture block 4, track adjusting wheel 5, eccentric shaft 6, key 8, free bearing 9, extension spring 10, pulling force adjustable bolt 11 and safety switch 13.
Can find out in conjunction with Fig. 1 and Fig. 2; When elevator normally moves; Clump weight 1 through hauling rope 2 track adjusting wheels 5 because of gravity produce to the pulling force idol of eccentric fixture block 4 pulling force idol greater than extension spring 10, eccentric fixture block 1 is with 9 times end in contact of free bearing and relative fixed, at this moment; Safety tongs is in non-action status, keeps certain clearance between the eccentric fixture block 4 of its braking element and slip fixture block 3 and the guide rail 7.When the descending acceleration/accel of car reaches limit value; The gravity of clump weight 1 reduces; To the pulling force idol of the pulling force of eccentric fixture block 4 idol less than extension spring 10, make eccentric fixture block 4 rotations, jaw to track 7 near, because of eccentric fixture block 4 and eccentric shaft 6 through key 8 key joints; Eccentric shaft 6 rotate drive slip clamp pieces 3 to track near, the fixture block up to the track both sides contact generation and rubs with track.Along with car 13 continues to move downward; Eccentric fixture block 4 is rotated further and drives slip fixture block 3 further grip track 7 under the combined action of friction force and position spring; The fixture block of both sides produces bigger friction force to track 7, forces descending deceleration of elevator, stops until elevator.The safety switch 12 that contacts with the fixture block simultaneously disconnection control circuit that is opened forces the motor of elevator out of service.Have only all safety switchs of working as to reset, when car is upwards mentioned, could discharge safety tongs.
Claims (1)
1. the utility model provides a kind of gravity eccentric shaft type safety tongs; It is to be made up of clump weight, hauling rope, slip fixture block, eccentric fixture block, track adjusting wheel, key, eccentric shaft, free bearing, extension spring, pulling force adjustable bolt and safety switch; It is characterized in that: clump weight is fixed in the lower end of hauling rope, and the other end of hauling rope is fixed through track adjusting wheel and eccentric fixture block; The eccentric part hinge of slip fixture block and eccentric shaft connects; Eccentric shaft and eccentric fixture block key joint; The two ends and the free bearing of eccentric shaft are hinged; One end of extension spring is linked in eccentric fixture block through the pulling force adjustable bolt, and the other end is fixed on the lift car; Free bearing is fixed on the lift car; Safety switch is fixed on the lift car, and its throw rod contacts with slip fixture block afterbody.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202035891U CN202529673U (en) | 2012-04-26 | 2012-04-26 | Gravity eccentric shaft type safety tongs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202035891U CN202529673U (en) | 2012-04-26 | 2012-04-26 | Gravity eccentric shaft type safety tongs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202529673U true CN202529673U (en) | 2012-11-14 |
Family
ID=47130870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202035891U Expired - Fee Related CN202529673U (en) | 2012-04-26 | 2012-04-26 | Gravity eccentric shaft type safety tongs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202529673U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347131A (en) * | 2015-12-11 | 2016-02-24 | 天津市奥瑞克电梯有限公司 | Balance structure of high-speed elevator release device |
| CN107265243A (en) * | 2017-08-08 | 2017-10-20 | 无锡市品电梯配件有限公司 | A kind of constant braking deceleration safety tongs |
| CN107538219A (en) * | 2017-08-31 | 2018-01-05 | 南京肯迈得机床制造有限公司 | Clamp in flexible mechanical joint |
| CN112723085A (en) * | 2020-12-28 | 2021-04-30 | 巨立电梯股份有限公司 | Elevator running acceleration detection and protection device |
-
2012
- 2012-04-26 CN CN2012202035891U patent/CN202529673U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347131A (en) * | 2015-12-11 | 2016-02-24 | 天津市奥瑞克电梯有限公司 | Balance structure of high-speed elevator release device |
| CN107265243A (en) * | 2017-08-08 | 2017-10-20 | 无锡市品电梯配件有限公司 | A kind of constant braking deceleration safety tongs |
| CN107538219A (en) * | 2017-08-31 | 2018-01-05 | 南京肯迈得机床制造有限公司 | Clamp in flexible mechanical joint |
| CN112723085A (en) * | 2020-12-28 | 2021-04-30 | 巨立电梯股份有限公司 | Elevator running acceleration detection and protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20130426 |