CN111776911B - Failure-proof elevator safety tongs and elevator - Google Patents
Failure-proof elevator safety tongs and elevator Download PDFInfo
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- CN111776911B CN111776911B CN202010713644.0A CN202010713644A CN111776911B CN 111776911 B CN111776911 B CN 111776911B CN 202010713644 A CN202010713644 A CN 202010713644A CN 111776911 B CN111776911 B CN 111776911B
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- main
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- nut
- wedges
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- 238000013459 approach Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 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)
- Types And Forms Of Lifts (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an anti-failure elevator safety clamp which comprises a lifting rod, a main clamp body and an auxiliary clamp body, wherein the auxiliary clamp body is arranged above the main clamp body, a containing groove is formed in a main wedge block, an opening of the containing groove faces to a guide rail, a roller is arranged in the containing groove, a guide hole communicated with an auxiliary wedge block corresponding to the vertical direction is formed in the containing groove, a push rod is arranged in the guide hole, the bottom end of the push rod stretches into the containing groove and is connected with a disc, the disc is in close contact with the roller, the top end of the push rod is in threaded connection with a nut, a top hole matched with the nut is formed in the bottom of the auxiliary wedge block, and the height of the top hole is larger than that of the nut. An elevator employing the safety tongs is also disclosed. The invention has the advantages that: by arranging the auxiliary clamp body, the auxiliary clamp body can play a role in generating braking force when the main clamp body fails. The elevator adopting the safety tongs is safer due to double protection.
Description
Technical Field
The invention relates to a failure-preventing 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 an anti-failure elevator safety clamp and an elevator, which can effectively solve the problems that the existing elevator only has one pair of safety clamp and the safety coefficient is insufficient.
In order to solve the technical problems, the invention is realized by the following technical scheme: the 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 containing groove, an opening of the containing groove faces the guide rail, a roller is arranged in the containing groove, the main wedge block is also provided with a guide hole which enables the containing groove to correspond to the auxiliary wedge block in the vertical direction, the guide hole is internally provided with a push rod, the bottom end of the push rod stretches into the containing groove and is connected with a disc, the disc is in tight contact with the roller, the top end of the push rod is in threaded connection with a nut, the bottom of the auxiliary wedge block is provided with a top hole matched with the nut, and the height of the top hole is larger than that of the nut.
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 cross section of the nut is regular polygon, the cross section of the top hole is the same as that of the nut, and the top of the nut is tightly contacted with the top of the top hole. The regular polygon is easy to process and is not easy to cause slipping of the nut and the top hole.
Preferably, the roller comprises a roller, a mandrel and two rubber wheels, the mandrel is fixed on the roller, one rubber wheel is respectively fixed on the rollers at two ends of the mandrel, one rubber wheel is in close contact with the disc, the circle center of the disc is not overlapped with the rubber wheel, and the diameter of the mandrel is smaller than that of the rubber wheel. The eccentric close contact of a rubber wheel and the disc ensures that the rubber wheel can drive the disc to rotate, so that the relative position of the nut rises to jack up the auxiliary clamp body, the diameter of the mandrel is larger than that of the rubber wheel, and the mandrel can not interfere with the rotation of the disc when the roller rotates.
An elevator adopts the anti-failure elevator safety tongs.
Compared with the prior art, the invention has the advantages that: through setting up vice clamp body, when the main clamp body became invalid, the gyro wheel was driven to the gyro wheel will drive the disc and rotate to make the ejector pin take place to rotate, because the nut can not rotate, so the nut takes place to move with the ejector pin vertical direction, upwards pushes up vice clamp body, makes the interval between two vice clamp bodies narrow, and two vice clamp bodies will hug tightly the guide rail, begins to brake, thereby the vice clamp body plays braking effect when the main clamp body became invalid, has ensured the safety of car. 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 the 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 anti-failure elevator safety tongs and an elevator embodiment of the invention comprise a lifting 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 moved upwards along the vertical direction under the action of the lifting rod 1 and mutually close to a clamping guide rail 4 are arranged in the main tongs body 2, each main wedge 5 is connected with one lifting rod 1, and two auxiliary wedges 6 which are moved upwards along the vertical direction and mutually close to the clamping guide rail 4 are arranged in the auxiliary tongs body 3;
The main wedge 5 is internally provided with a containing groove 20, the opening of the containing groove 20 faces the guide rail 4, a roller 21 is arranged in the containing groove, a roller part extends out of the containing groove so as to be convenient for contacting with the guide rail to drive the roller to rotate in the follow-up operation, the main wedge 5 is also provided with a guide hole 22 which enables the containing groove 20 to be communicated with the auxiliary wedge 6 corresponding to the vertical direction, the guide hole 22 is internally provided with a push rod 23, the bottom end of the push rod 23 extends into the containing groove 20 and is connected with a disc 24, the disc 24 is in close contact with the roller 21, the top end of the push rod 23 is in threaded connection with a nut 25, and the bottom of the auxiliary wedge 6 is provided with a top hole 26 which is matched with the nut 25.
Through setting up vice clamp body, when the main clamp body became invalid, the gyro wheel was driven to the gyro wheel will drive the disc and rotate to make the ejector pin take place to rotate, because the nut can not rotate, so the nut takes place to move with the ejector pin vertical direction, upwards pushes up vice clamp body, makes the interval between two vice clamp bodies narrow, and two vice clamp bodies will hug tightly the guide rail, begins to brake, thereby the vice clamp body plays braking effect when the main clamp body became invalid, has ensured the safety of car. 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.
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 prevent the nut 25 from rotating when the ejector rod 23 rotates, the nut 25 and the ejector rod 23 move relatively in the vertical direction, the cross section of the nut 25 is in a regular polygon shape, the cross section of the ejector hole 26 is the same as that of the nut 25, the top of the nut 25 is tightly contacted with the top of the ejector hole 26, the cross section of the nut 25 is in a regular hexagon shape, and in order to lengthen the relative movement distance between the nut 25 and the ejector rod 23, the nut 25 can be made to be as long as possible in the height direction, so that a longer movement stroke can be obtained.
When the roller 21 rolls, the disc 24 is required to be driven to rotate, so that the roller 21 generally comprises a roller 27, a mandrel 28 and two rubber wheels 29, the mandrel 28 is fixed on the roller 27, the rollers 27 at two ends of the mandrel 28 are respectively fixed with one rubber wheel 29, one rubber wheel 29 is tightly contacted with the disc 24, the circle center of the disc 24 is not overlapped with the rubber wheel 29, and the diameter of the mandrel 28 is smaller than that of the rubber wheel 29, so that the disc 24 can be driven to rotate when the rubber wheel 29 rolled by the roller contacts with the guide rail 4 to rotate, and the ejector rod 23 is driven to rotate relative to the nut 25.
The invention also discloses an elevator, and the anti-failure elevator safety tongs adopting the technical scheme.
When the lifting rod 1 is used, if a 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 surface 8, the guide rail 4 is clamped, in the process, the main wedges 5 move upwards to drive the ejector rod 23 to move upwards, meanwhile, the main caliper body 2 holds the guide rail 4 and cannot stand Ma Tingzhu, the roller 21 can rotate, the driving disc 24 drives the ejector rod 23 to rotate, the nut 25 and the ejector rod 23 can move relatively in the vertical direction, in order to eliminate the influence on the auxiliary wedges 6, namely, the auxiliary wedges 6 cannot contact the guide rail 4 at the moment, so that the numerical value of the height of the ejector hole is calculated, namely, the height difference between the ejector hole and the nut is larger than the sum of the rising height of the main wedges during braking and the rising height of the nut relative to the ejector rod during braking, the auxiliary caliper body 3 does not play a role in braking, the loss of the auxiliary caliper body 3 during braking of the main caliper body 2 is reduced, and the auxiliary caliper body 2 can play a role in braking, and the braking time and the distance and the braking time are shortened. If the main clamp body 2 fails, the cage continues to descend, the roller 21 drives the disc 24 to continue to rotate, the ejector rod 23 also continues to rotate relative to the nut 25, the nut 25 moves upwards to jack up the auxiliary wedge blocks 6 upwards, the interval component between the two auxiliary wedge blocks 6 is reduced due to the interaction of the auxiliary guide surface 11 and the auxiliary wedge inclined surface 12, the two auxiliary wedge blocks 6 tightly hold the guide rail 4, braking is started, and the cage stops falling. Therefore, after the main clamp body 2 fails, the auxiliary clamp body 3 plays a role to ensure the safety of the elevator.
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. Prevent inefficacy elevator safety tongs, its 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 utility model discloses a device for preventing and controlling the height of the nut, including main voussoir (5) and auxiliary voussoir (6), main voussoir (5) are internally opened there is holding tank (20), holding tank (20) opening is towards guide rail (4), be equipped with gyro wheel (21) in the holding tank, main voussoir (5) still open have make holding tank (20) and the communicating guiding hole (22) of auxiliary voussoir (6) that vertical direction corresponds, be equipped with ejector pin (23) in guiding hole (22), the bottom of ejector pin (23) stretches into in holding tank (20) and is connected with disc (24), disc (24) and gyro wheel (21) in close contact with, the top and nut (25) threaded connection of ejector pin (23), open bottom of auxiliary voussoir (6) has top hole (26) with nut (25) looks adaptation, the height of top hole is greater than the nut.
2. The fail-safe elevator safety gear according to 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 fail-safe elevator safety gear according to 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 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 fail-safe elevator safety gear according to 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 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 fail-safe elevator safety gear according to claim 1, wherein: the lifting rod (1) is fixedly connected with the bottom of the corresponding main wedge block (5).
8. The fail-safe elevator safety gear according to claim 1, wherein: the cross section of the nut (25) is regular polygon, the cross section of the top hole (26) is the same as that of the nut (25), and the top of the nut (25) is tightly contacted with the top of the top hole (26).
9. The fail-safe elevator safety gear according to claim 1, wherein: the roller (21) comprises a roller (27), a mandrel (28) and two rubber wheels (29), wherein the mandrel (28) is fixed on the roller (27), the rollers (27) at two ends of the mandrel (28) are respectively fixed with one rubber wheel (29), one rubber wheel (29) is in close contact with the disc (24), the circle center of the disc (24) is not overlapped with the rubber wheels (29), and the diameter of the mandrel (28) is smaller than that of the rubber wheels (29).
10. An elevator, characterized in that: use of a fail-safe elevator safety gear according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713644.0A CN111776911B (en) | 2020-07-20 | 2020-07-20 | Failure-proof elevator safety tongs and elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713644.0A CN111776911B (en) | 2020-07-20 | 2020-07-20 | Failure-proof elevator safety tongs and elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111776911A CN111776911A (en) | 2020-10-16 |
| CN111776911B true CN111776911B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010713644.0A Active CN111776911B (en) | 2020-07-20 | 2020-07-20 | Failure-proof elevator safety tongs and elevator |
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| Country | Link |
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| CN (1) | CN111776911B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022178843A1 (en) * | 2021-02-26 | 2022-09-01 | 杭州沪宁电梯部件股份有限公司 | Brake assembly for safety protection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203820234U (en) * | 2014-05-15 | 2014-09-10 | 快客电梯有限公司 | Elevator speed limiter |
| CN104401837A (en) * | 2014-12-08 | 2015-03-11 | 苏州莱茵电梯制造有限公司 | Safety tongs for curve operation elevator |
| CN105905740A (en) * | 2016-06-25 | 2016-08-31 | 浙江南奥电梯有限公司 | Elevator safety clamp |
| CN106241549A (en) * | 2016-08-30 | 2016-12-21 | 浙江西子富沃德电机有限公司 | A kind of elevator bidirectional safety tongs |
| CN212403067U (en) * | 2020-07-20 | 2021-01-26 | 台州学院 | Failure-prevention elevator safety tongs and elevator |
-
2020
- 2020-07-20 CN CN202010713644.0A patent/CN111776911B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203820234U (en) * | 2014-05-15 | 2014-09-10 | 快客电梯有限公司 | Elevator speed limiter |
| CN104401837A (en) * | 2014-12-08 | 2015-03-11 | 苏州莱茵电梯制造有限公司 | Safety tongs for curve operation elevator |
| CN105905740A (en) * | 2016-06-25 | 2016-08-31 | 浙江南奥电梯有限公司 | Elevator safety clamp |
| CN106241549A (en) * | 2016-08-30 | 2016-12-21 | 浙江西子富沃德电机有限公司 | A kind of elevator bidirectional safety tongs |
| CN212403067U (en) * | 2020-07-20 | 2021-01-26 | 台州学院 | Failure-prevention elevator safety tongs and elevator |
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| Publication number | Publication date |
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| CN111776911A (en) | 2020-10-16 |
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