CN212292412U

CN212292412U - Safety tongs for elevator maintenance

Info

Publication number: CN212292412U
Application number: CN202020785932.2U
Authority: CN
Inventors: 董斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-01-05
Anticipated expiration: 2030-05-13

Abstract

The utility model discloses a safety gear for elevator maintenance; belongs to the technical field of elevator safety devices; the safety gear comprises a safety gear shell, a guide rail arranged on the safety gear shell and a lifting rod arranged in the guide rail, wherein fixed blocks are fixedly arranged in the middle parts of two sides of the inner wall of the guide rail, a groove is formed in the middle part of the inner side of each fixed block, a stop block is movably arranged in the groove, one side of each stop block extends to the outer side of the groove, one side of each stop block, which is far away from the fixed blocks, is obliquely arranged, two extending blocks are arranged between the two stop blocks, and the two extending blocks are respectively positioned on two sides; the utility model discloses a when the braking, the lifting rod rebound to when two extension pieces rebound through two connecting plates pulling, the pulling connecting wire draws two dogs to be close, makes two extension pieces more fastening and the quicker safety tongs casing that blocks, is favorable to improving braking effect, shortens braking distance.

Description

Safety tongs for elevator maintenance

Technical Field

The utility model relates to an elevator safety device technical field, more specifically say, especially relate to an elevator is safety tongs for maintenance.

Background

The safety tongs are a safety protection device for the operation of the elevator, are arranged on an elevator car frame or a counterweight frame, and are used for emergently stopping the elevator car and clamping the elevator car on an elevator guide rail when serious faults such as overspeed, rope breakage and the like occur to the elevator. A pair of sliding wedges is fixed in the safety gear, and an elevator guide rail penetrates between the two sliding wedges. When the elevator car is in a normal running state, the two sliding wedge blocks are located at the lowest part, and a certain distance is reserved between the clamping surface and the elevator guide rail. When the elevator car is in fault and drops quickly and the speed reaches the running speed set by the speed limiter, the safety tongs act, and the speed limiter lifts the two sliding wedges through the lifting mechanism until the clamping surfaces of the two sliding wedges firmly clamp the elevator guide rail, so that the elevator car stops moving.

However, when the existing safety tongs are used for braking, the elevator with a higher speed has a longer braking distance, because the elevator has an excessively high speed, the two braking plates are seriously abraded, and the existing safety tongs only brake by the approach of the two braking plates, so that the existing safety tongs need to be pulled upwards continuously to keep a good braking effect, and the braking distance is longer.

Therefore, it is necessary to provide a safety gear for elevator maintenance to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a safe pincers are used in elevator maintenance that braking effect is good to the not enough of above-mentioned prior art.

The technical scheme of the utility model is realized like this: a safety gear for elevator maintenance comprises a safety gear shell, a guide rail arranged on the safety gear shell and a lifting rod arranged in the guide rail, wherein fixed blocks are fixedly arranged at the middle parts of two sides of the inner wall of the guide rail, a groove is formed in the middle part of the inner side of each fixed block, a stop block is movably arranged in the groove, one side of each stop block extends to the outer side of the groove, one side of each stop block, which is far away from the fixed block, is obliquely arranged, two extending blocks are arranged between the two stop blocks and are respectively positioned at two sides of the safety gear shell, one side of each extending block, which is close to the stop block, is obliquely arranged and is attached and connected with one side of each stop block, a reset spring is fixedly arranged at the bottom of the groove, the other end of each reset spring is fixedly connected with one side of each, the end, far away from the guide rail inner wall, of the fixed rod is movably sleeved with a rolling ring, the rolling ring is rotatably connected with the fixed rod through a bearing, a connecting wire is arranged on the rolling ring, and two ends of the connecting wire are fixedly connected with the middle of one side of the back face of the stop block and the middle of one side of the lifting rod respectively.

As a further scheme of the invention: two the extension piece is the symmetric distribution, reset spring is provided with a plurality ofly, and a plurality of reset spring are the rectangular array and distribute.

As a further scheme of the invention: one side that two extend the piece back and be close to the safety tongs casing all is provided with the connecting plate, the one end of connecting plate extends to the front of carrying the pull rod, the positive both sides of carrying the pull rod all are fixed and are provided with first bull stick.

As a further scheme of the invention: the one end of first bull stick runs through the one end of connecting plate to rotate with the connecting plate through the bearing and be connected, it is fixed to extend a back one side and be provided with the second bull stick, the other end of second bull stick through the connecting plate to rotate with the connecting plate through the bearing and be connected.

As a further scheme of the invention: the limiting grooves are formed in the middle of the inner walls of the two sides of the groove, and limiting blocks matched with the limiting grooves are fixedly arranged at the two ends of the stop block.

As a further scheme of the invention: two the adjacent one side middle part of extension piece all is fixed and is provided with wear-resisting brake plate, one side of wear-resisting brake plate is fixed and is provided with a plurality of damping sand grips that are equidistant distribution.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a when braking, the lifting rod upwards moves, and when pulling two extension blocks upwards to move through two connecting plates, pulls the connecting wire, draws two dogs to be close, makes two extension blocks more firm and faster block the safety tongs casing, is favorable to improving braking effect, shortens braking distance;

2. the wear-resistant brake plate has the wear-resistant effect through the arrangement of the wear-resistant brake plate, thereby being beneficial to reducing the wear and prolonging the service life; through the setting of a plurality of damping sand grips, the damping sand grip can increase frictional force, is favorable to improving braking effect.

Drawings

The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention.

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic sectional structural view in elevation of the present invention;

fig. 3 is a schematic structural diagram of the utility model at a in fig. 2;

fig. 4 is a partially enlarged schematic structural view of fig. 1 of the present invention;

in the figure: 1. a safety gear housing; 2. lifting a pull rod; 3. a connecting plate; 4. a guide rail; 5. a fixed block; 6. a groove; 7. a stopper; 8. an extension block; 9. a limiting groove; 10. a limiting block; 11. a return spring; 12. fixing the rod; 13. a rolling ring; 14. a connecting wire; 15. a wear resistant brake plate; 16. damping convex strips; 17. a first rotating lever; 18. a second rotating rod.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

The utility model provides a safety gear for elevator maintenance as shown in figures 1-4, which comprises a safety gear shell 1, a guide rail 4 arranged on the safety gear shell 1 and a lifting rod 2 arranged inside the guide rail 4.

The middle parts of two sides of the inner wall of the guide rail 4 are fixedly provided with fixed blocks 5, the middle part of the inner side of each fixed block 5 is provided with a groove 6, the inner part of each groove 6 is movably provided with a stop block 7, one side of each stop block 7 extends to the outer side of the corresponding groove 6, one side of each stop block 7, which is far away from the corresponding fixed block 5, is obliquely arranged, two extending blocks 8 are arranged between the two stop blocks 7, the two extending blocks 8 are respectively positioned at two sides of the safety gear shell 1, the two extending blocks 8 are symmetrically distributed, one side of each extending block 8, which is close to the corresponding stop block 7, is obliquely arranged and is attached to one side of the corresponding stop block 7, the inclined planes of the stop blocks 7 and the extending blocks 8 are in the same inclined direction, the bottoms of the grooves 6 are fixedly provided with a plurality of reset springs 11, the reset, the reset spring 11 has a reset function, when the elevator is in operation recovery, the reset spring 11 can pull the two stoppers 7 to recover the original position, the fixed rods 12 are fixedly arranged on both sides of the middle part of the back surface of the guide rail 4, one end of the fixed rod 12, which is far away from the inner wall of the guide rail 4, is movably sleeved with the rolling ring 13, the rolling ring 13 is rotatably connected with the fixed rod 12 through a bearing, the rolling ring 13 is provided with the connecting wire 14, both ends of the connecting wire 14 are respectively fixedly connected with the middle parts of one side of the back surface of the stoppers 7 and one side of the lifting rod 2, the connecting wire 14 adopts a steel wire rope, the connecting wire is not easy to break, when the elevator is braked, the lifting rod 2 moves upwards, and pulls the two extending blocks 8 to move upwards through the two connecting plates 3, meanwhile, the connecting wire 14 is pulled to, the braking distance is shortened.

Furthermore, the middle parts of the inner walls of two sides of the groove 6 are respectively provided with a limiting groove 9, two ends of the stop block 7 are respectively fixedly provided with a limiting block 10 matched with the limiting groove 9, the middle parts of adjacent sides of the two extending blocks 8 are respectively fixedly provided with a wear-resistant brake plate 15, and through the arrangement of the wear-resistant brake plates 15, the wear-resistant brake plates 15 have a wear-resistant effect, so that the wear is reduced, the service life is prolonged, one side of each wear-resistant brake plate 15 is fixedly provided with a plurality of damping convex strips 16 distributed at equal intervals, and through the arrangement of the plurality of damping convex strips 16, the friction force can be increased by the damping convex strips 16; the wear-resistant brake plate 15 and the damping convex strips 16 are both made of fibers, and the carbon fibers are high-temperature-resistant fibers with high strength and high modulus, and have small thermal expansion coefficient and good corrosion resistance.

Secondly, two 8 backs of extension piece are close to one side of safety tongs casing 1 and all are provided with connecting plate 3, the one end of connecting plate 3 extends to the front of carrying pull rod 2, carry the positive both sides of pull rod 2 and all fix and be provided with first bull stick 17, the one end of first bull stick 17 runs through the one end of connecting plate 3, and rotate with connecting plate 3 through the bearing and be connected, 8 back one side of extension piece is fixed and is provided with second bull stick 18, second bull stick 18 runs through the other end of connecting plate 3, and rotate with connecting plate 3 through the bearing and be connected.

The utility model discloses the theory of operation:

when the elevator safety tongs are used, when the elevator normally runs, the safety tongs do not work, gaps exist between the two extension blocks 8 and the safety tongs shell 1, and the elevator car of the elevator normally moves up and down; when the elevator breaks down, the car moves downwards with higher speed, when speed surpassed the limit speed of overspeed governor, safety tongs work this moment, lifting rod 2 upwards mentions, make two connecting plates 3 drive extension piece 8 upwards move along the slope of dog 7, lifting rod 2 pulls connecting wire 14 simultaneously, make two dogs 7 be close to each other, thereby make two extension pieces 8 open simultaneously with two dogs 7 and be close to, it presss from both sides tight safety tongs casing 1 to make the car brake until two extension pieces 8, this safety tongs makes braking effect increase because two dogs 7 are close to simultaneously with two extension pieces 8, the braking distance that reduces.

The above embodiment is the preferred embodiment of the present invention, which is only used to facilitate the explanation of the present invention, it is not right to the present invention, which makes the restriction on any form, and any person who knows commonly in the technical field can use the present invention to make the equivalent embodiment of local change or modification without departing from the technical features of the present invention.

Claims

1. The utility model provides an elevator maintenance uses safety tongs, includes safety tongs casing (1), installs guide rail (4) on safety tongs casing (1) and installs in guide rail (4) inside lifting rod (2), its characterized in that: the middle parts of two sides of the inner wall of the guide rail (4) are fixedly provided with fixed blocks (5), the middle part of the inner side of each fixed block (5) is provided with a groove (6), the grooves (6) are movably provided with stop blocks (7), one side of each stop block (7) extends to the outer side of the groove (6), one side of each stop block (7) far away from the corresponding fixed block (5) is obliquely arranged, two extending blocks (8) are arranged between the two stop blocks (7), the two extending blocks (8) are respectively positioned at two sides of the safety tongs shell (1), one side of each extending block (8) close to the corresponding stop block (7) is obliquely arranged and is attached to one side of each stop block (7) close to the corresponding extending block (8), a reset spring (11) is fixedly arranged at the bottom of each groove (6), and the other end of each reset spring (11) is fixedly connected with one side of, guide rail (4) back middle part both sides all are fixed and are provided with dead lever (12), dead lever (12) are kept away from the one end activity of guide rail (4) inner wall and are cup jointed and be provided with rolling ring (13), and rolling ring (13) rotate with dead lever (12) through the bearing and are connected, be provided with connecting wire (14) on rolling ring (13), and the both ends of connecting wire (14) respectively with dog (7) back one side and lifting rod (2) one side middle part fixed connection.

2. Safety tongs for elevator maintenance according to claim 1, characterized in that the two extension blocks (8) are symmetrically distributed, the return springs (11) are provided in plurality and the return springs (11) are distributed in a rectangular array.

3. The safety gear for maintaining the elevator according to claim 1, wherein the connecting plates (3) are arranged on one sides of the back surfaces of the two extending blocks (8) close to the safety gear shell (1), one ends of the connecting plates (3) extend to the front surface of the lifting rod (2), and the first rotating rods (17) are fixedly arranged on two sides of the front surface of the lifting rod (2).

4. The safety gear for maintaining the elevator according to claim 3, wherein one end of the first rotating rod (17) penetrates through one end of the connecting plate (3) and is rotatably connected with the connecting plate (3) through a bearing, a second rotating rod (18) is fixedly arranged on one side of the back surface of the extending block (8), and the second rotating rod (18) penetrates through the other end of the connecting plate (3) and is rotatably connected with the connecting plate (3) through a bearing.

5. The safety tongs for maintaining the elevator according to claim 1, wherein the middle parts of the inner walls of the two sides of the groove (6) are provided with limit grooves (9), and the two ends of the stop block (7) are fixedly provided with limit blocks (10) matched with the limit grooves (9).

6. Safety tongs for elevator maintenance according to claim 1, characterized in that a wear resistant brake plate (15) is fixed in the middle of the adjacent side of each of the two extension blocks (8), and a plurality of damping ribs (16) are fixed on one side of the wear resistant brake plate (15) and are distributed at equal intervals.