CN107963531B - Elevator safety tongs reliable in clamping - Google Patents
Elevator safety tongs reliable in clamping Download PDFInfo
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- CN107963531B CN107963531B CN201711215151.9A CN201711215151A CN107963531B CN 107963531 B CN107963531 B CN 107963531B CN 201711215151 A CN201711215151 A CN 201711215151A CN 107963531 B CN107963531 B CN 107963531B
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- guide
- clamping
- shaped spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
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- Mechanical Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The elevator safety tongs with reliable clamping comprise a tong seat, a U-shaped spring arranged in the tong seat, two guide blocks symmetrically arranged in the U-shaped spring and a clamping block connected with the inner side of each guide block respectively, wherein a group of lifting mechanisms are arranged on the two clamping blocks together, the clamping blocks provide inward pressing force through the U-shaped spring, the top of each guide block is provided with a resistance balancing mechanism respectively, and the outer side surface of each guide block is connected with an elastic force balancing mechanism respectively. According to the invention, the rolling shaft which is used for being in contact with the caliper seat is arranged at the upper end of the brake guide block, so that uneven resistance can be effectively released through the rolling shaft, meanwhile, the spherical gasket is connected between the brake guide block and the U-shaped spring, and elastic unbalance loading can be effectively eliminated through the spherical surface of the spherical gasket, so that the brake guide block can be flexibly adjusted to a balanced state even under the action of large resistance of the clamping block and is always tightly attached to the caliper seat and the U-shaped spring, the balance of braking force of the clamping block on the elevator guide rail is ensured, the braking effect is better, and the safety performance is greatly improved.
Description
Technical Field
The invention relates to an elevator safety gear with reliable clamping.
Background
The elevator safety gear is used for emergently stopping the elevator car and clamping the elevator car on the elevator guide rail when serious faults such as overspeed, rope breakage and the like occur to the elevator. The conventional elevator safety tongs mainly comprise a tong seat, a pull rod and a braking mechanism, wherein the tong seat is fixedly connected with a car; brake mechanism comprises U type spring, two wedges and two system guide blocks etc. and two system guide blocks set up in the oral area of U type spring relatively, and two wedges set up relatively between two system guide blocks, through the cooperation of wedge between wedge and the guide block, have the clearance between two wedges, and the elevator guide rail passes from this clearance: the pull rod is connected to the two wedge-shaped blocks. The working process is as follows: when the elevator car is accelerated accidentally, the pull rod obtains a speed difference for the caliper seat and lifts upwards, the two wedge blocks are pulled to move upwards, and the two wedge blocks move oppositely and are clamped on the guide rail under the guidance of the wedge surfaces between the wedge blocks and the guide blocks, so that emergency braking is realized.
However, in the conventional elevator safety tongs, the upper end of the guide block is in plane contact with the tong seat, and the guide block is directly connected with the U-shaped spring into a whole under the action of the positioning bolt, so that when the wedge block is continuously lifted upwards, the guide block cannot effectively release resistance and the lateral deviation phenomenon occurs, and the guide block, the wedge block and the U-shaped spring cannot be tightly attached together, so that the balanced transmission of braking force is influenced. Therefore, the existing elevator safety tongs have the problems of unbalanced braking force, unsatisfactory braking effect, high potential safety hazard, short service life and the like.
Disclosure of Invention
The invention aims to solve the problems and the defects, and provides the elevator safety tongs which are reliable in structure, balanced in braking force, good in braking effect, high in safety performance and long in service life.
The technical scheme of the invention is realized as follows:
the invention relates to an elevator safety gear with reliable clamping, which is characterized in that: the elevator guide rail clamping device comprises a clamp seat, a U-shaped spring arranged in the clamp seat, two guide blocks symmetrically arranged in the U-shaped spring and a clamping block respectively connected with the inner side of each guide block, wherein a group of lifting mechanisms are jointly arranged on the two clamping blocks, an opening convenient for an elevator guide rail to penetrate through the two clamping blocks is formed in the clamp seat, the clamping blocks provide inward pressing force through the U-shaped spring, the top of each guide block is respectively provided with a resistance balancing mechanism, and the outer side surface of each guide block is respectively connected with an elasticity balancing mechanism.
The resistance balancing mechanism comprises a rolling shaft, the rolling shaft is rotatably arranged in an arc-shaped groove formed in the top of the guide block, and a horizontal guide groove in contact with an arc surface of the rolling shaft is formed in the top of the clamp seat.
The elastic force balancing mechanism comprises a positioning bolt and a spherical gasket arranged on the positioning bolt, the positioning bolt penetrates through the tong seat and the U-shaped spring, the inner end of the positioning bolt is connected with the guide block, the outer end of the positioning bolt is connected with a nut on the outer side face of the tong seat, and the spherical gasket is located between the inner side face of the U-shaped spring and the outer side face of the guide block and is connected with the U-shaped spring and the guide block into a whole under the tensioning force action of the positioning bolt.
The upper end of the guide block is provided with a limiting bump, and the upper end face of the clamping block is pressed on the bottom face of the limiting bump after the clamping block moves upwards to the maximum height relative to the guide block.
The lifting mechanism comprises a supporting plate arranged on the bottom surfaces of the two clamping blocks and a pull rod fixedly connected to the middle of the supporting plate and upwards penetrating through the top surface of the clamp base, guide posts are respectively arranged at the bottoms of the two clamping blocks, guide grooves are respectively arranged at positions on the supporting plate corresponding to the guide posts, and a slotted hole for a guide rail of the elevator to penetrate through is formed in the supporting plate.
According to the invention, the rolling shaft which is used for being in contact with the caliper seat is arranged at the upper end of the brake guide block, so that uneven resistance can be effectively released through the rolling shaft, meanwhile, the spherical gasket is connected between the brake guide block and the U-shaped spring, and elastic unbalance loading can be effectively eliminated through the spherical surface of the spherical gasket, so that the brake guide block can be flexibly adjusted to a balanced state even under the action of large resistance of the clamping block and is always tightly attached to the caliper seat and the U-shaped spring, the balance of braking force of the clamping block on the elevator guide rail is ensured, the braking effect is better, and the safety performance is greatly improved. Moreover, the utility model discloses a structure is reliable, and the braking is nimble, and the dismouting is easy.
The invention will be further described with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic front structural view of the present invention.
Fig. 3 is a schematic front view of the present invention with parts removed.
Fig. 4 is a schematic structural diagram of the use state of the present invention.
Fig. 5 is a schematic cross-sectional structure of the present invention.
FIG. 6 is a schematic backside view of a partial structure according to the present invention.
Fig. 7 is an exploded view of a portion of the structure of the present invention.
Fig. 8 is a schematic front view of a partial structure of the present invention.
Detailed Description
As shown in fig. 1-8, the elevator safety gear with reliable clamping comprises a gear base 1, a U-shaped spring 2 arranged in the gear base 1, two groups of swing type clamping mechanisms 3 symmetrically arranged in an opening of the U-shaped spring 2, and a group of lifting mechanisms 4 arranged on the two groups of swing type clamping mechanisms 3 together, wherein an opening 11 for an elevator guide rail to pass through between the two groups of swing type clamping mechanisms 3 is formed in the gear base 1, and the two groups of swing type clamping mechanisms 3 provide inward pressing force through the U-shaped spring 2.
Specifically, the swing type clamping mechanism 3 comprises a guide block 31, a clamping block 32 and a swing arm 33, wherein the swing arm 33 is arranged from outside to inside and from top to bottom in an inclined manner, the upper end of the swing arm 33 is rotatably connected with the guide block 31 through a rotating shaft 36, and the lower end of the swing arm is rotatably connected with the clamping block 32 through the rotating shaft 36. As shown in the figure, fixed support plates 37 are welded to the front and back of the guide block 31 and the clamp block 32, respectively, and the rotating shaft 36 is connected to a connecting hole formed in the fixed support plate 37. Meanwhile, three swing arms 33 of each swing type clamping mechanism 3 are arranged up and down, so that the whole stress balance of the clamping blocks 32 is ensured. The pivot shafts at the upper and lower ends of the swing arm 33 are connected to return springs 34, and the return springs 34 are located on the back surfaces of the guide block 31 and the clamp block 32. The guide block 31 is located between the U-shaped spring 2 and the clamping block 32, and is limited in the vertical direction by the top plate 12 of the caliper holder 1 and the positioning support plate 13 arranged on the caliper holder 1, a horizontal guide plate 313 is arranged at the bottom of the guide block 31, and a support guide groove 131 matched and connected with the horizontal guide plate 313 is arranged on the positioning support plate 13. When the elevator has the problems of overspeed, rope breakage and the like, the clamping block 32 can swing upwards relative to the guide block 31 under the pulling action of the pulling mechanism 4 and is pressed against the outer side surface of the elevator guide rail through the braking force provided by the U-shaped spring 2 and the support of the swing arm 33, so that the clamping of the elevator guide rail is effectively realized.
In order to effectively limit the swing angle of the clamping block and prevent the problem of blocking, a first limiting notch 311 is formed in the guide block 31, a second limiting notch 321 is formed in the clamping block 32, and the swing arm 33 is arranged in a groove cavity formed between the first limiting notch 311 and the second limiting notch 321. Meanwhile, the upper end of the guide block 31 is provided with a limit bump 312, and the upper end surface of the clamping block 32 is pressed on the bottom surface of the limit bump 312 after swinging upwards to the maximum angle relative to the guide block 31, so that the resistance received by the clamping block can be better transmitted out through the guide block. Of course, the lower end of the clamping block 32 may also be provided with a limit stop, and when the clamping block 32 swings upward to a certain angle, the top surface of the limit stop abuts against the lower end surface of the guide block 31. Alternatively, bayonets may be provided at both ends of the swing arm 33, and the swing arm 33 may be rotatably engaged with the stopper block 31 and the clamp block 32 by the bayonets.
In order to ensure that the two clamping blocks can synchronously swing upwards and improve the braking effect, the lifting mechanism 4 comprises a supporting plate 41 arranged on the bottom surfaces of the two clamping blocks 32 and a pull rod 42 fixedly connected to the middle part of the supporting plate 41 and upwards penetrating through the top surface of the caliper base 1, guide posts 35 are respectively arranged at the bottoms of the two clamping blocks 32, guide grooves 411 are respectively arranged at positions on the supporting plate 41 corresponding to the guide posts 35, so that a sufficient moving space is provided for the swinging of the clamping blocks 32, and a slotted hole 412 for an elevator guide rail to penetrate through is formed in the supporting plate 41 and between the two guide grooves 411.
In order to effectively release uneven resistance and keep the guide block balanced in the horizontal direction all the time, a resistance balancing mechanism 5 is arranged at the top of the swing type clamping mechanism 3. The resistance balancing mechanism 5 comprises a roller 51, the roller 51 is rotatably arranged in an arc-shaped groove 314 formed in the top of the guide block 31, and a horizontal guide groove 14 which is in contact with the arc surface of the roller 51 is formed in the inner side surface of the top of the caliper seat 1. The width of the horizontal guide groove 14 is the same as the length of the roller 51. In addition, the roller 51 may be replaced by a roller.
In order to effectively eliminate the elastic force unbalance load and enable the braking force to be transmitted to the clamping block uniformly all the time, an elastic force balance mechanism 6 is connected to the outer side surface of the swing type clamping mechanism 3. The elastic force balancing mechanism 6 comprises a positioning bolt 61 and a spherical gasket 62 arranged on the positioning bolt 61, the positioning bolt 61 penetrates through the caliper seat 1 and the U-shaped spring 2, the inner end of the positioning bolt is connected with the outer side surface of the guide block 31, the outer end of the positioning bolt is connected with a nut 63 on the outer side surface of the caliper seat 1, and the spherical gasket 62 is positioned between the inner side surface of the U-shaped spring 2 and the outer side surface of the guide block 31 and is connected with the U-shaped spring 2 and the guide block 31 into a whole under the action of the tensioning force of the positioning bolt 61. Specifically, the side of the spherical washer 62 having the arc convex surface is disposed in a groove 315 formed on the outer side surface of the guide block 31, and the side thereof having the arc concave surface is in close contact with the inner side surface of the U-shaped spring 2.
When the invention is braked, the two clamping blocks 32 synchronously swing upwards by lifting the lifting mechanism 4, when the clamping blocks swing to a certain angle, the clamping blocks are attached to the outer side surface of the elevator guide rail and clamped on the elevator guide rail through the braking force provided by the U-shaped spring 2, so that the emergency braking of the elevator under the conditions of overspeed, rope breakage and the like is effectively realized, and the resistance generated by braking is transmitted to the caliper seat 1 through the rolling shaft 51 on the braking guide block 31.
While the present invention has been described by way of examples, and not by way of limitation, other variations of the disclosed embodiments, as would be readily apparent to one of skill in the art, are intended to be within the scope of the present invention, as defined by the claims.
Claims (3)
1. The utility model provides a press from both sides tight reliable elevator safety tongs which characterized in that: comprises a caliper seat (1), a U-shaped spring (2) arranged in the caliper seat (1), two guide blocks (31) symmetrically arranged in the U-shaped spring (2) and a clamping block (32) respectively connected with the inner sides of the guide blocks (31), wherein a group of lifting mechanisms (4) are jointly arranged on the two clamping blocks (32), an opening (11) convenient for an elevator guide rail to pass through between the two clamping blocks (32) is formed in the caliper seat (1), the clamping blocks (32) provide inward pressing force through the U-shaped spring (2), resistance balancing mechanisms (5) are respectively arranged at the tops of the guide blocks (31), each resistance balancing mechanism (5) comprises a rolling shaft (51), the rolling shaft (51) is rotatably arranged in a circular arc-shaped groove (314) formed at the top of the guide block (31), and a horizontal guide groove (14) contacted with the circular arc surface of the rolling shaft (51) is formed at the top of the caliper seat (1), and the outer side surfaces of the guide blocks (31) are respectively connected with an elastic force balancing mechanism (6), the elastic force balancing mechanism (6) comprises a positioning bolt (61) and a spherical gasket (62) arranged on the positioning bolt (61), the positioning bolt (61) is arranged on the pincer base (1) and the U-shaped spring (2) in a penetrating mode, the inner end of the positioning bolt is connected with the guide blocks (31), the outer end of the positioning bolt is connected with a nut (63) arranged on the outer side surface of the pincer base (1), and the spherical gasket (62) is arranged between the inner side surface of the U-shaped spring (2) and the outer side surface of the guide blocks (31) and connected with the U-shaped spring (2) and the guide blocks (31) into a whole under the tensioning force of the positioning bolt (61).
2. The elevator safety gear with reliable clamping as set forth in claim 1, characterized in that: the upper end of the guide block (31) is provided with a limiting bump (312), and the upper end face of the clamping block (32) is pressed on the bottom face of the limiting bump (312) after the clamping block moves upwards to the maximum height relative to the guide block (31).
3. The elevator safety gear with reliable clamping as set forth in claim 1, characterized in that: the lifting mechanism (4) comprises a supporting plate (41) arranged on the bottom surfaces of the two clamping blocks (32) and a pull rod (42) fixedly connected to the middle of the supporting plate (41) and upwards penetrating through the top surface of the clamp base (1), guide posts (35) are respectively arranged at the bottoms of the two clamping blocks (32), guide grooves (411) are respectively arranged on the supporting plate (41) at positions corresponding to the guide posts (35), and a slotted hole (412) for an elevator guide rail to penetrate through is formed in the supporting plate (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711215151.9A CN107963531B (en) | 2017-11-28 | 2017-11-28 | Elevator safety tongs reliable in clamping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711215151.9A CN107963531B (en) | 2017-11-28 | 2017-11-28 | Elevator safety tongs reliable in clamping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107963531A CN107963531A (en) | 2018-04-27 |
| CN107963531B true CN107963531B (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711215151.9A Active CN107963531B (en) | 2017-11-28 | 2017-11-28 | Elevator safety tongs reliable in clamping |
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| Country | Link |
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| CN (1) | CN107963531B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319551A (en) * | 2000-04-14 | 2001-10-31 | 中国建筑科学研究院建筑机械化研究分院 | Bidirectional safety tongs for elevator |
| CN205906859U (en) * | 2016-08-04 | 2017-01-25 | 广东精创机械制造有限公司 | Elevator safety tongs |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9612136D0 (en) * | 1996-06-10 | 1996-08-14 | Cameron David S | Clamping device |
| CN204111109U (en) * | 2014-07-16 | 2015-01-21 | 佛山市力东电梯配件有限公司 | A kind of safety tongs |
| GB2543291A (en) * | 2015-10-13 | 2017-04-19 | Atwell Int Ltd | Clamping device |
| CN205114762U (en) * | 2015-11-05 | 2016-03-30 | 日立电梯（中国）有限公司 | Can realize on --spot pull rod direction combination of changing of engineering |
-
2017
- 2017-11-28 CN CN201711215151.9A patent/CN107963531B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319551A (en) * | 2000-04-14 | 2001-10-31 | 中国建筑科学研究院建筑机械化研究分院 | Bidirectional safety tongs for elevator |
| CN205906859U (en) * | 2016-08-04 | 2017-01-25 | 广东精创机械制造有限公司 | Elevator safety tongs |
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| CN107963531A (en) | 2018-04-27 |
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