CN2344367Y - Flat spring progressive type safety tongs - Google Patents
Flat spring progressive type safety tongs Download PDFInfo
- Publication number
- CN2344367Y CN2344367Y CN 98240537 CN98240537U CN2344367Y CN 2344367 Y CN2344367 Y CN 2344367Y CN 98240537 CN98240537 CN 98240537 CN 98240537 U CN98240537 U CN 98240537U CN 2344367 Y CN2344367 Y CN 2344367Y
- Authority
- CN
- China
- Prior art keywords
- sliding wedge
- safety tongs
- shaped spring
- pin
- wedge block
- 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 - Lifetime
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The utility model relates to a pair of flat spring progressive type safety tongs, which comprises a tong seat, a tong body which is formed by a U-shaped spring, a fixing wedge block, a sliding wedge block, etc., wherein the top of the sliding wedge block is provided with a regulating screw which is used for regulating the opening and closing degree of the U-shaped spring, particularly the intensity of braking force. The side wall of the sliding wedge block is fixedly connected with a pulling plate by a pin so as to realize a single pulling mode and a double pulling mode. Consequently, the flat spring progressive type safety tongs have the characteristics of simple structure, convenient operation, adjustable braking force, high safety, adaptability increase of the safety tongs, etc.
Description
The utility model relates to a kind of safety device of lift car, especially a kind of gradual safety device of lift car belongs to a kind of annex of lift car.
The leaf spring type safety tongs is a lift car gradual safety device commonly used, is widely adopted owing to it is simple in structure.Accompanying drawing 1 is depicted as domestic relatively representative type leaf spring type safety device structural representation.The pincers seat 12 of this safety tongs is welded by steel plate, caliper 14 is made by the U-shaped spring, fixedly voussoir 13 abuts against U-shaped spring medial surface, and can move along the folding direction of the chute that clamps seat 12 by the U-shaped spring, and sliding wedge 15 can move along fixedly voussoir 13 inclined-planes are upper and lower.Elevator is when normal operation, and sliding wedge 15 is in the lower position of pincers seat 12 under the deadweight effect, sliding wedge medial surface and guide rail are maintained a certain distance, and guarantees the normal operation of elevator.When elevator is deposited under the faulty condition tenesmus fast and speed when reaching the responsiveness of velocity limiter, the velocity limiter action is mentioned sliding wedge 15, clamping guide rail 16 by the lifting rod (not marking among the figure) that links to each other with coupling nut 11, and caliper spreading at this moment, until the end position of voussoir stroke.The size of its Clamping force is determined by the deflection of U-shaped spring.But the load of elevator, car weight are not quantitatively, and the elastic force of U-shaped spring has very big discreteness because of the error of heat treatment, the material of spring own and finish size, so under same device condition, very difficult assurance obtains same friction force.。For this reason, the U-shaped spring and fixedly between the voussoir 13 the increase and decrease bearing cap shim with change sliding wedge 15 reach above the spreading degree of U-shaped spring during end position, reach the purpose of adjusting the friction force size.But the thickness of bearing cap shim is 0.5mm at present, therefore the U-shaped spring increased the aperture of 0.5mm when every increase a slice bearing cap shim was equivalent to sliding wedge and reaches capacity the position, at this moment increasing elastic force is 2--4KN, promptly increase 10--17%, be difficult to make friction force to reach the desired quantity that design needs, cause a large amount of U-shaped spring plate degree.In addition, the pulling apparatus that former safety tongs adopts is a kind of single stretching structure, and its texture ratio is dull, and Applicable scope is narrower.
The purpose of this utility model is to overcome the deficiency of above-mentioned existence, and provides a kind of structure simple relatively, can regulate the distance of sliding wedge end position reliably, improves the leaf spring progressive safety gear of the degree of utilization of U-shaped spring.
The purpose of this utility model is finished by following technical solution, it mainly comprises the caliper that a pincers seat that is welded by steel plate, is made by the U-shaped spring and abuts against the fixedly voussoir of U-shaped spring inboard and be positioned at the cage guide both sides adjacent to the fixing sliding wedge of voussoir, it is characterized in that described sliding wedge top is provided with trimming screw.
The utility model also offers pin-and-hole on the wall of the limit of described sliding wedge, the end of an arm-tie is connected in the pin-and-hole by pin and fixes.
Description of drawings is as follows:
Fig. 1 is a kind of leaf spring type safety tongs structural representation of the prior art.
Fig. 2 is that the A of Fig. 1 is to structural representation.
Fig. 3 is a structural representation of the present utility model.
Fig. 4 is a pulling apparatus structural representation of the present utility model
To be described in detail the utility model by accompanying drawing below: Fig. 1--shown in Figure 2 is the structure of a kind of leaf spring type safety tongs of the prior art, among the figure, the 11st, the coupling nut who links to each other with lifting rod; The 12nd, the pincers seat that is welded by steel plate; The 13rd, fixing voussoir; The 14th, U-shaped spring caliper; The 15th, sliding wedge; The 16th, guide rail.
Fig. 3--shown in Figure 4 is structure of the present utility model, and it also includes coupling nut 21, pincers seat 22, fixedly voussoir 23, U-shaped spring caliper 24, sliding wedge 25 and guide rail (not shown).Pincers seat 22 is welded by steel plate, and caliper 24 is made by the U-shaped spring, fixedly voussoir 23 abuts against the medial surface of U-shaped spring, and can move along the folding direction of the chute that clamps seat 22 by the U-shaped spring, sliding wedge 25 can be along on the fixing voussoir inclined-plane, move down, have additional set screw 26 at the top of sliding wedge, change the distance of sliding wedge 25 by the degree of depth that changes set screw screw-in voussoir to end position, so in fact, changed the degree of U-shaped spring spreading, reached the purpose that changes elastic force, elastic force is increased, otherwise, elastic force is reduced.Because the distance that set screw 26 is regulated is continuous, so theoretically, no matter the U-shaped spring is made what state, can both adjust elastic force to the value that needs, make the braking force of safety tongs reach best, improved the degree of utilization of U-shaped spring greatly, guaranteed the quality of safety tongs.
The utility model is drilled with a pin-and-hole 27 on the wall of the limit of sliding wedge 25, the end of arm-tie 28 is fixed in pin-and-hole 27 by pin 29 and is fixed on the sliding wedge 25, and present embodiment is as being connected the single pulling apparatus that has just become the same with former safety tongs by pin 29 with the back arm-tie; Just become two pulling apparatus if be connected (each sliding wedge is connected with a preceding arm-tie) with preceding arm-tie, the comformability of safety tongs is increased by pin 29.
The utility model compared with prior art has simple in structurely, easy to use, and brake force is adjustable, safety Performance is good, and has increased the characteristics such as adaptability of safety tongs.
Claims (2)
1, a kind of leaf spring progressive safety gear, it comprises a pincers seat that is welded by steel plate, one caliper of being made by the U-shaped spring and the fixedly voussoir that abuts against U-shaped spring medial surface and be positioned at the cage guide both sides adjacent to the fixing sliding wedge of voussoir is characterized in that described sliding wedge (25) top is provided with set screw (26).
2, leaf spring progressive safety gear as claimed in claim 1 is characterized in that offering pin-and-hole (27) on the limit wall of described sliding wedge (25), and the end of arm-tie (28) is fixed in the pin-and-hole by pin (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98240537 CN2344367Y (en) | 1998-09-14 | 1998-09-14 | Flat spring progressive type safety tongs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98240537 CN2344367Y (en) | 1998-09-14 | 1998-09-14 | Flat spring progressive type safety tongs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2344367Y true CN2344367Y (en) | 1999-10-20 |
Family
ID=33987520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98240537 Expired - Lifetime CN2344367Y (en) | 1998-09-14 | 1998-09-14 | Flat spring progressive type safety tongs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2344367Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104229589A (en) * | 2014-08-28 | 2014-12-24 | 南通爱利特机电制造有限公司 | High-safety progressive elevator safety gear |
| CN105000446A (en) * | 2015-08-13 | 2015-10-28 | 卫小兵 | Device for preventing elevator car from moving accidentally |
-
1998
- 1998-09-14 CN CN 98240537 patent/CN2344367Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104229589A (en) * | 2014-08-28 | 2014-12-24 | 南通爱利特机电制造有限公司 | High-safety progressive elevator safety gear |
| CN105000446A (en) * | 2015-08-13 | 2015-10-28 | 卫小兵 | Device for preventing elevator car from moving accidentally |
| CN105000446B (en) * | 2015-08-13 | 2017-04-12 | 卫小兵 | Device for preventing elevator car from moving accidentally |
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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 | ||
| CX01 | Expiry of patent term |