CN111776909B - Cam type anti-failure elevator safety tongs and elevator - Google Patents
Cam type anti-failure elevator safety tongs and elevator Download PDFInfo
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- CN111776909B CN111776909B CN202010713641.7A CN202010713641A CN111776909B CN 111776909 B CN111776909 B CN 111776909B CN 202010713641 A CN202010713641 A CN 202010713641A CN 111776909 B CN111776909 B CN 111776909B
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- wedge block
- clamp body
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- 238000013459 approach Methods 0.000 claims description 6
- 210000000080 chela (arthropods) Anatomy 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
- B66B5/22—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by means of linearly-movable wedges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses cam type failure-proof elevator safety tongs which comprise a lifting rod, a main tongs body and an auxiliary tongs body, wherein a main wedge block is arranged in the main tongs body, an auxiliary wedge block is arranged in the auxiliary tongs body, a main accommodating groove is formed in the main wedge block, an opening of the main accommodating groove faces to a guide rail, a roller is arranged in the main accommodating groove, a first guide hole which enables the main accommodating groove to be communicated with the auxiliary wedge block corresponding to the vertical direction is formed in the main wedge block, a cam driven to rotate by the roller is further arranged in the main accommodating groove, a second guide hole is formed in the bottom of the auxiliary wedge block corresponding to the main wedge block, the top of a push rod is arranged in the second guide hole, the bottom of the push rod is contacted with the surface of the cam, and the lifting of the push rod is controlled by the rotation of the cam. An elevator adopts the cam type anti-failure elevator safety tongs. The invention has the advantages that: when the main clamp body fails, the auxiliary clamp body plays a role in braking, and the safety coefficient is improved. After the elevator adopts the structure, double guarantee is provided for the common elevator when the elevator fails, and the safety of the elevator car is ensured.
Description
Technical Field
The invention relates to cam type anti-failure elevator safety tongs and an elevator.
Background
The elevator is a common transportation device for people, in particular to a car elevator used in a high-rise building, the existing car elevator is provided with safety tongs, but generally a guide rail is correspondingly provided with the safety tongs, when the elevator suddenly drops down, the safety tongs can be mutually close to clamp the guide rail to play a role of emergency braking, but because only one safety tongs is provided, the life of passengers in the elevator can be greatly threatened in case of failure.
Disclosure of Invention
The invention aims to provide cam type anti-failure elevator safety tongs and an elevator, which can effectively solve the problem that the existing elevator has only one pair of safety tongs and has insufficient safety coefficient.
In order to solve the technical problems, the invention is realized by the following technical scheme: the cam type anti-failure elevator safety tongs comprise lifting rods, a main tongs body and an auxiliary tongs body, wherein the auxiliary tongs body is arranged above the main tongs body, two main wedges which move upwards along the vertical direction under the action of the lifting rods and mutually draw close to a clamping guide rail are arranged in the main tongs body, each main wedge is connected with one lifting rod, and two auxiliary wedges which move upwards along the vertical direction and mutually draw close to the clamping guide rail are arranged in the auxiliary tongs body;
The main wedge block is internally provided with a main accommodating groove, an opening of the main accommodating groove faces the guide rail, a roller is arranged in the main accommodating groove, the main wedge block is also provided with a first guide hole which enables the main accommodating groove to be communicated with the auxiliary wedge block corresponding to the vertical direction, the main accommodating groove is also internally provided with a cam driven to rotate by the roller, the bottom of the auxiliary wedge block corresponding to the main wedge block is provided with a second guide hole, the second guide hole is internally provided with the top of the ejector rod, the bottom of the ejector rod contacts with the surface of the cam, and the lifting of the ejector rod is controlled by the rotation of the cam.
Preferably, the main clamp body and the auxiliary clamp body are integrally arranged; or the main clamp body is fixedly connected with the auxiliary clamp body through bolts. The main clamp body and the auxiliary clamp body which are integrally arranged have good rigidity and stability of connection, and the safety is higher; the split main clamp body and the split auxiliary clamp body are suitable for improving the existing equipment, so that the maintenance cost can be reduced, and the main clamp body or the auxiliary clamp body with faults can be independently replaced.
Preferably, the main forceps body is internally provided with a main chamber, the inner side wall of the main chamber gradually approaches to the middle part of the main chamber from bottom to top to form a main guide surface, two main wedges are arranged in the main chamber, a gap for a guide rail to pass through is reserved between the two main wedges, and the two main wedges are respectively provided with a main wedge inclined surface matched with the main guide surface. When the main wedge blocks are acted by upward force to move, the main guide surfaces are contacted with the inclined surfaces of the main wedge blocks, and the two main wedge blocks are pressed towards the middle to be mutually close to clamp the guide rail for braking.
Preferably, the surface of the main wedge block opposite to the guide rail is a plane. The plane is easy to process, the production cost is reduced, and the installation is convenient.
Preferably, the auxiliary clamp body is internally provided with an auxiliary chamber, the inner side wall of the auxiliary chamber gradually approaches to the middle part of the auxiliary chamber from bottom to top to form an auxiliary guide surface, two auxiliary wedges are arranged in the auxiliary chamber, a gap for a guide rail to pass through is reserved between the two auxiliary wedges, and the two auxiliary wedges are respectively provided with an auxiliary wedge inclined surface matched with the auxiliary guide surface. The auxiliary wedge blocks move upwards after being acted by the main wedge block, the auxiliary guide surfaces are contacted with the inclined surfaces of the auxiliary wedge blocks, the two auxiliary wedge blocks are extruded towards the middle, and the two auxiliary wedge blocks are mutually close to each other to tightly clamp the guide rail for braking.
Preferably, the surface of the auxiliary wedge block opposite to the guide rail is a plane.
Preferably, the lifting rod is fixedly connected with the bottom of the corresponding main wedge block. The lifting rod generates upward thrust and pushes the main wedge blocks to be close.
Preferably, the roller comprises a wheel shaft and a rubber wheel, the wheel shaft is rotationally connected to two opposite side walls of the main chamber, the cam is sleeved on the wheel shaft, and the rubber wheels are respectively sleeved on the wheel shafts at two ends of the cam. The rubber wheels are contacted with the guide rails to provide enough friction force to drive the cams to rotate, so that the ejector rods are driven to move upwards to jack up the auxiliary wedge blocks.
Preferably, the side face of the main cavity is opened, and a baffle plate for closing the opening is arranged on the side face of the main clamp body. The side opening is convenient for the installation of the main wedge block and the ejector rod, and after the installation is finished, the opening is timely closed through the baffle plate, so that the movement of the main wedge block is protected from being influenced.
An elevator adopts the cam type anti-failure elevator safety tongs.
Compared with the prior art, the invention has the advantages that: through setting up vice pincers body, when the main pincers body became invalid, the gyro wheel took place relative slip with the guide rail contact, and the rotation of gyro wheel drives the cam rotation, and the cam promotes the ejector pin and upwards moves in vertical direction to jack-up vice voussoir upwards, thereby the vice voussoir upwards moves in-process and can draw close each other and press from both sides tight guide rail, realizes the braking, just so can the vice pincers body exert braking effect when the main pincers body became invalid, improves factor of safety. After the elevator adopts the structure, double guarantee is provided for the common elevator when the elevator fails, and the safety of the elevator car is ensured.
Drawings
Fig. 1 is a structural view of cam type fail-safe elevator safety gear of the present invention;
FIG. 2 is a schematic diagram of the structure A-A in FIG. 1.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Referring to fig. 1 and 2, the cam type anti-failure elevator safety tongs and an elevator embodiment of the invention comprise a lifting pull rod 1, a main tongs body 2 and an auxiliary tongs body 3, wherein the auxiliary tongs body 3 is arranged above the main tongs body 2, two main wedges 5 which are upwards moved by the lifting pull rod 1 along the vertical direction to mutually close the clamping guide rail 4 are arranged in the main tongs body 2, each main wedge 5 is connected with one lifting pull rod 1, and two auxiliary wedges 6 which are upwards moved along the vertical direction to mutually close the clamping guide rail 4 are arranged in the auxiliary tongs body 3;
The main wedge block 5 is internally provided with a main accommodating groove 20, the opening of the main accommodating groove 20 faces the guide rail 4, the main accommodating groove is internally provided with a roller 21, the main wedge block 5 is also provided with a first guide hole 22 which enables the main accommodating groove 20 to be communicated with the auxiliary wedge block 6 corresponding to the vertical direction, the main accommodating groove 20 is internally provided with a cam 29 which is driven to rotate by the roller 21, the bottom of the auxiliary wedge block corresponding to the main wedge block is provided with a second guide hole 25, the inside of the second guide hole is provided with the top of a push rod 26, the bottom of the push rod 26 is contacted with the surface of the cam 29, and the lifting of the push rod 26 is controlled by the rotation of the cam 29.
Through setting up vice pincers body, when the main pincers body became invalid, the gyro wheel took place relative slip with the guide rail contact, and the rotation of gyro wheel drives the cam rotation, and the cam promotes the ejector pin and upwards moves in vertical direction to jack-up vice voussoir upwards, thereby the vice voussoir upwards moves in-process and can draw close each other and press from both sides tight guide rail, realizes the braking, just so can the vice pincers body exert braking effect when the main pincers body became invalid, improves factor of safety.
Generally, the main clamp body 2 and the auxiliary clamp body 3 are preferably integrally manufactured, so that the safety and stability are relatively high, the main clamp body 2 and the auxiliary clamp body 3 can be separately arranged, and the main clamp body and the auxiliary clamp body are connected through bolts, so that old equipment is convenient to reform, and the maintenance cost is also facilitated to be reduced.
For the structure of the main clamp body 2, a main cavity 7 is arranged in the main clamp body 2, the inner side wall of the main cavity 7 gradually approaches to the middle part of the main cavity 7 from bottom to top to form a main guide surface 8, two main wedges 5 are arranged in the main cavity 7, a gap for the guide rail 4 to pass through is reserved between the two main wedges 5, two main wedges 5 are all provided with main wedge inclined surfaces 9 matched with the main guide surface 8, the surface of the main wedges 5 opposite to the guide rail 4 is a plane, the main cavity 7 can be understood as a quadrangular frustum of a bevel, the main wedges 5 are quadrangular frustum of a bevel, the track of upward movement of the main wedges 5 can be controlled while the transverse force is provided for the main wedges 5, the main wedges 5 are prevented from rotating in the movement process, and the track of the main wedges 5 is always in plane contact. The gap between the two main wedges 5 allows the guide rail to pass through when the elevator is in normal motion, and when emergency braking is required, the two main wedges are mutually closed, and the gap gradually disappears.
The structure of the auxiliary clamp body 3 is similar to that of the main clamp body 2, an auxiliary chamber 10 is arranged in the auxiliary clamp body 3, the inner side wall of the auxiliary chamber 10 gradually approaches the middle part of the auxiliary chamber 10 from bottom to top to form an auxiliary guide surface 11, two auxiliary wedges 6 are arranged in the auxiliary chamber 10, a gap for the guide rail 4 to pass through is reserved between the two auxiliary wedges 6, auxiliary wedge inclined surfaces 12 matched with the auxiliary guide surface 11 are arranged on the two auxiliary wedges 6, and the surface of the auxiliary wedges 6 opposite to the guide rail 4 is a plane.
In the design, the lifting rod 1 is fixedly connected with the bottom of the corresponding main wedge block 5, when the car falls, the lifting rod 1 moves upwards to push the main wedge block 5 upwards, so that the main wedge block 5 clamps the guide rail 4 for braking.
In order to enable the roller to drive the auxiliary wedge blocks to brake more timely, the roller comprises a wheel shaft 27 and a rubber wheel 28, the wheel shaft is rotationally connected to two opposite side walls of the main chamber, a cam 29 is sleeved on the wheel shaft, the rubber wheels are respectively sleeved on the wheel shafts at two ends of the cam 29, and the rubber wheels can generate larger friction force when being contacted with the guide rail, so that the cam is driven to rotate.
Because the roller is installed in the main chamber, the components of the ejector rod 26 are too complex, and for more convenient installation, the side surface of the main chamber is preferably provided with an opening, so that the installation is more convenient, and after the installation is finished, the opening can be closed by using a baffle 31 in a bolt connection mode.
The invention also discloses an elevator, and the cam type anti-failure elevator safety tongs adopting the technical scheme.
When the elevator car lifting device is used, the lifting rod 1 is installed, if an elevator car falls, the lifting rod 1 pushes the main wedges 5 to move upwards, the two main wedges 5 are mutually close under the action of the main guide surfaces 8, the guide rails 4 are clamped, the main clamp body 2 is an instant safety clamp, the elevator car can be stopped immediately, at the moment, the idler wheels hardly rotate, the main wedges 5 can drive the auxiliary wedges 6 to rise, the distance between the auxiliary wedges 6 can be slightly larger than the distance between the main wedges, namely the auxiliary wedges 6 are ensured to be not contacted with the guide rails 4 after the main wedges 5 rise to clamp the guide rails 4, but after the elevator car is stopped by the main wedges 5, the idler wheels 21 start to roll, the cams 29 are driven to rotate, the ejector rods 26 are pushed to move upwards by the rotation of the cams 29, the auxiliary wedges 6 are driven by the upward force of the ejector rods 26, the auxiliary wedges 6 are mutually close to the guide rails 4 under the action of the auxiliary guide surfaces 11, and therefore the auxiliary clamp body 3 plays a role of stopping the elevator car when the main clamp body 2 fails, and the elevator car safety is ensured.
The above embodiments are merely illustrative embodiments of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the present invention are included in the scope of the present invention.
Claims (10)
1. Cam type anti-failure elevator safety tongs are characterized in that: the clamp comprises a lifting rod (1), a main clamp body (2) and an auxiliary clamp body (3), wherein the auxiliary clamp body (3) is arranged above the main clamp body (2), two main wedges (5) which move upwards along the vertical direction under the action of the lifting rod (1) to mutually close a clamping guide rail (4) are arranged in the main clamp body (2), each main wedge (5) is connected with one lifting rod (1), and two auxiliary wedges (6) which move upwards along the vertical direction to mutually close the clamping guide rail (4) are arranged in the auxiliary clamp body (3); the main wedge block (5) is internally provided with a main accommodating groove (20), an opening of the main accommodating groove (20) faces the guide rail (4), a roller (21) is arranged in the main accommodating groove, the main wedge block (5) is further provided with a first guide hole (22) which enables the main accommodating groove (20) to be communicated with the auxiliary wedge block (6) corresponding to the vertical direction, the main accommodating groove (20) is internally provided with a cam (29) driven to rotate by the roller (21), the bottom of the auxiliary wedge block corresponding to the main wedge block is provided with a second guide hole (25), the second guide hole is internally provided with the top of the ejector rod (26), the bottom of the ejector rod (26) is in surface contact with the cam (29), and the lifting of the ejector rod (26) is controlled by the rotation of the cam (29).
2. The cam fail-safe elevator safety gear of claim 1, wherein: the main clamp body (2) and the auxiliary clamp body (3) are integrally arranged; or the main clamp body (2) is fixedly connected with the auxiliary clamp body (3) through bolts.
3. The cam fail-safe elevator safety gear of claim 1, wherein: the main forceps is characterized in that a main cavity (7) is arranged in the main forceps body (2), the inner side wall of the main cavity (7) gradually approaches the middle part of the main cavity (7) from bottom to top to form a main guide surface (8), two main wedges (5) are arranged in the main cavity (7), a gap for the guide rail (4) to pass through is reserved between the two main wedges (5), and two main wedges (5) are respectively provided with a main wedge inclined surface (9) matched with the main guide surface (8).
4. A cam fail-safe elevator safety gear according to claim 3, wherein: the surface of the main wedge block (5) opposite to the guide rail (4) is a plane.
5. The cam fail-safe elevator safety gear of claim 1, wherein: the auxiliary clamp is characterized in that an auxiliary chamber (10) is arranged in the auxiliary clamp body (3), the inner side wall of the auxiliary chamber (10) gradually approaches the middle of the auxiliary chamber (10) from bottom to top to form an auxiliary guide surface (11), two auxiliary wedges (6) are arranged in the auxiliary chamber (10), a gap for the guide rail (4) to pass through is reserved between the two auxiliary wedges (6), and two auxiliary wedge inclined surfaces (12) matched with the auxiliary guide surface (11) are arranged on the auxiliary wedges (6).
6. The cam fail-safe elevator safety gear according to claim 5, wherein: the surface of the auxiliary wedge block (6) opposite to the guide rail (4) is a plane.
7. The cam fail-safe elevator safety gear of claim 1, wherein: the lifting rod (1) is fixedly connected with the bottom of the corresponding main wedge block (5).
8. A cam fail-safe elevator safety gear according to claim 3, wherein: the roller comprises a wheel shaft (27) and rubber wheels (28), the wheel shaft is rotationally connected to two opposite side walls of the main chamber, the cam (29) is sleeved on the wheel shaft, and the rubber wheels are respectively sleeved on the wheel shafts at two ends of the cam (29).
9. A cam fail-safe elevator safety gear according to claim 3, wherein: the side face of the main cavity is opened, and a baffle (31) for closing the opening is arranged on the side face of the main clamp body.
10. An elevator, characterized in that: use of a cam fail-safe elevator safety gear according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713641.7A CN111776909B (en) | 2020-07-20 | 2020-07-20 | Cam type anti-failure elevator safety tongs and elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713641.7A CN111776909B (en) | 2020-07-20 | 2020-07-20 | Cam type anti-failure elevator safety tongs and elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111776909A CN111776909A (en) | 2020-10-16 |
| CN111776909B true CN111776909B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010713641.7A Active CN111776909B (en) | 2020-07-20 | 2020-07-20 | Cam type anti-failure elevator safety tongs and elevator |
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| Country | Link |
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| CN (1) | CN111776909B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB496536A (en) * | 1937-07-02 | 1938-12-01 | Waygood Otis Ltd | Improvements in and relating to safety apparatus for elevators |
| KR20000039334A (en) * | 1998-12-12 | 2000-07-05 | 이종수 | Emergency stopping device of an elevator |
| CN203820234U (en) * | 2014-05-15 | 2014-09-10 | 快客电梯有限公司 | Elevator speed limiter |
| CN213112100U (en) * | 2020-07-20 | 2021-05-04 | 台州学院 | Cam type failure-prevention elevator safety tongs and elevator |
-
2020
- 2020-07-20 CN CN202010713641.7A patent/CN111776909B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB496536A (en) * | 1937-07-02 | 1938-12-01 | Waygood Otis Ltd | Improvements in and relating to safety apparatus for elevators |
| KR20000039334A (en) * | 1998-12-12 | 2000-07-05 | 이종수 | Emergency stopping device of an elevator |
| CN203820234U (en) * | 2014-05-15 | 2014-09-10 | 快客电梯有限公司 | Elevator speed limiter |
| CN213112100U (en) * | 2020-07-20 | 2021-05-04 | 台州学院 | Cam type failure-prevention elevator safety tongs and elevator |
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| Publication number | Publication date |
|---|---|
| CN111776909A (en) | 2020-10-16 |
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