CN213202001U

CN213202001U - Box-type elevator safety tongs with buffering function

Info

Publication number: CN213202001U
Application number: CN202022066330.4U
Authority: CN
Inventors: 邵辉; 庞智超; 陈娟娟
Original assignee: Tianjin Liye Electromechanical Equipment Engineering Co ltd
Current assignee: Tianjin Liye Electromechanical Equipment Engineering Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-05-14
Anticipated expiration: 2030-09-21

Abstract

The patent application relates to the technical field of safety tongs and discloses a box type elevator safety tong with a buffer function, which comprises a tong seat, the clamp seat is provided with a chute which is in sliding fit with the guide rail, two clamping components are arranged in the clamp seat, the clamping components are symmetrically arranged by taking the central line of the sliding groove as a symmetry axis, the clamping components comprise an installation box, a sliding block, a guide block, a first clamping block and a second clamping block, a driving device is arranged in the clamp seat, when the descending speed of the elevator exceeds the limit speed set by the speed limiter of the elevator, the driving device drives the installation box to move towards the direction close to the guide rail, drives the sliding block to contact with the guide rail, and the sliding block slides upwards and pushes the guide block, so that the first clamping block and the second clamping block sequentially extend out and are clamped on the guide rail, the safety tongs have a buffering function, and a large amount of heat can be prevented from being generated due to rapid braking, so that potential safety hazards can be avoided.

Description

Box-type elevator safety tongs with buffering function

Technical Field

The utility model relates to a safety tongs technical field especially relates to a box elevator safety tongs from taking buffer function.

Background

The safety tongs are a safety protection device of the elevator, and the elevator safety tongs are controlled by the speed limiter, and when the speed running speed of the elevator exceeds the set limit speed of the speed limiter of the elevator, the driving device drives the clamping block to enable the braking element of the safety tongs to be in contact with the guide rail, so that the car is emergently stopped and clamped on the guide rail. The existing safety tongs can clamp the car on the guide rail quickly, but severe friction can be generated between the clamping blocks moving at high speed and the guide rail during braking, so that a large amount of heat is generated, fire can be caused seriously, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model provides a from box elevator safety tongs of taking buffer function, the quick braking that the intention exists is solved and a large amount of thermal problems can be produced.

In order to achieve the above purpose, the basic scheme of the utility model is as follows:

a box type elevator safety gear with a buffering function comprises a gear seat, wherein a sliding groove in sliding fit with a guide rail is formed in the gear seat, two clamping assemblies are arranged in the gear seat and symmetrically arranged by taking the central line of the sliding groove as a symmetry axis, each clamping assembly comprises an installation box, the installation box is in sliding fit with the gear seat, a driving device is arranged in the gear seat and used for driving the installation box to move towards the guide rail;

the side surface, close to the guide rail, of the installation box is a first side surface, the side surface, far away from the guide rail, of the installation box is a second side surface, the side surface, connected with the first side surface and the second side surface, of the installation box is a third side surface, the installation box is provided with a sliding block in a sliding mode, one end of the sliding block penetrates through the first side surface, and when the installation box is driven by the driving device to move towards the guide rail, the sliding block is driven to slide along a linear direction parallel to the guide rail by friction force generated by contact between one end, exposed out of the installation box, of;

the guide block is connected to the second side face of the installation box in a sliding manner, a reset spring is fixedly connected between the upper end of the guide block and the installation box, the lower end of the guide block abuts against the sliding block, a first contact portion and a second contact portion are formed on the side face, close to the guide rail, of the guide block, the first contact portion comprises a first convex portion and a first concave portion, the second contact portion comprises a second convex portion and a second concave portion, a first clamping block and a second clamping block are arranged in the installation box, one end of the first clamping block penetrates through the first side face of the installation box in a sliding manner, the second clamping block penetrates through the first side face of the installation box in a sliding manner, one end, accommodated in the installation box, of the first clamping block is in sliding fit with the first contact portion, one end, accommodated in the installation box, of the second clamping block is in sliding fit with the second contact portion, and when the sliding block slides along the linear direction parallel to the guide rail, the slide block pushes the guide block to move so that one end of the first clamping block abuts against the first convex portion, one end of the second clamping block abuts against the second convex portion, the first clamping block and the second clamping block slide towards the direction of the guide rail, and the other ends of the first clamping block and the second clamping block abut against the guide rail in sequence.

Further, a first platform is formed on the first convex portion, a second platform is formed on the second convex portion, when one end of the first clamping block abuts against the guide rail, the other end of the first clamping block abuts against the first platform, when one end of the second clamping block abuts against the guide rail, the other end of the second clamping block abuts against the second platform, the length of the first platform is larger than that of the second platform, and the first clamping block is prevented from being separated from the first platform in the braking process.

Further, install the slide rail on two third sides on the install bin respectively, the slide rail sets up in the below of first grip block and extends to the inner wall of install bin bottom surface, install the ball slider with slide rail looks adaptation on the slider, can reduce the friction between slider and the install bin to still played the guide effect, prevented that the slider from blocking owing to taking place to rotate, avoid the slider trouble.

Furthermore, a first friction plate is fixedly connected to the side wall, close to the guide rail, of the sliding block, the first friction plate is in contact with the guide rail to generate friction force, the friction force between the sliding block and the guide rail is increased, and the sliding block can push the guide block to move under the action of the friction force.

Furthermore, an elastic pull rope is fixedly connected between the first clamping block and the installation box and between the second clamping block and the installation box respectively, the elastic pull rope is in a stretching state, one end of the first clamping block and one end of the second clamping block, which are contained in the installation box, are abutted against the guide blocks respectively, and the first clamping block and the second clamping block can reset along with the guide blocks.

Furthermore, the surfaces of the first clamping block and the second clamping block, which are close to the guide rail, are respectively and fixedly connected with a second friction plate, the second friction plates are used for clamping the first clamping block and the second clamping block on the guide rail, and the friction force between the clamping blocks and the guide rail is increased through the friction plates so as to play a role in braking.

Further, the second friction plate is made of a copper alloy material, the copper alloy has good thermal conductivity and hardly contains carbon, when the copper alloy rubs against other objects, heat generated in a short time can be absorbed and conducted, and the copper alloy has good deformability and is not easy to generate sparks.

Furthermore, a plurality of saw-tooth-shaped protrusions are formed on a plane where the second friction plate can be in contact with the guide rail, the roughness of the second friction plate can be increased through the saw-tooth-shaped protrusions, friction between the second friction plate and the guide rail is increased, a plurality of gaps are formed between the friction plate and the guide rail, heat generated by friction can be dissipated from the gaps in time, and sparks caused by overhigh temperature due to friction are avoided.

Compared with the prior art, the scheme has the beneficial effects that:

the guide block is provided with the first contact part and the second contact part which can push the first clamping block and the second clamping block to move to the guide rail and sequentially clamp the guide rail, so that the box type elevator is fixed on the guide rail and has a buffer function, severe friction caused by rapid braking is prevented, potential safety hazards are avoided, and injury of passengers caused by rapid braking can be avoided; the reliability of the clamping assembly is high, the friction force borne by the first clamping block and the second clamping block can be dispersed to each component in the assembly, and the service life of the whole assembly can be prolonged; the first clamping block and the second clamping block are in sliding fit with the installation box, so that the installation and replacement are convenient; the guide block sets up in the install bin, avoids because uncovered setting makes the surface corrosion of guide block or adheres to the dust, causes the influence to the precision of safety tongs.

Drawings

Fig. 1 is a schematic view of the overall structure of a box-type elevator safety gear with a buffer function of the utility model;

fig. 2 is a schematic view of a sectional structure of a box type elevator safety gear with a buffer function of the utility model;

FIG. 3 is a partial enlarged view of A of the present invention;

FIG. 4 is a partial enlarged view of the section B of the present invention;

reference numerals in the drawings of the specification include:

1. a guide rail; 2. a clamp base; 21. a chute; 3. a drive device; 4. installing a box; 41. a first side surface; 411. a sliding slot opening; 412. a first guide slot; 413. a second guide slot; 42. a second side surface; 43. a third side; 5. a slider; 51. a first friction plate; 6. a guide block; 61. a first contact portion; 611. a first convex portion; 612. a first recess; 613. a first platform; 62. a second contact portion; 621. a second convex portion; 622. a second recess; 623. a second platform; 71. a first clamping block; 72. a second clamping block; 8. a second friction plate; 81. a sawtooth-shaped bulge; 9. a return spring.

Detailed Description

The invention will be described in further detail by means of specific embodiments with reference to the accompanying drawings:

example (b):

a box type elevator safety gear with a buffer function comprises a gear seat 2, a sliding groove 21 in sliding fit with a guide rail 1 is formed in the gear seat 2, two clamping assemblies are arranged in the gear seat 2, the clamping assemblies are symmetrically arranged by taking the central line of the sliding groove 21 as a symmetry axis, each clamping assembly comprises an installation box 4, the installation boxes 4 are in sliding fit with the gear seat 2, a driving device 3 is arranged in the gear seat 2, and the driving device 3 is used for driving the installation boxes 4 to move towards the guide rail 1;

as shown in fig. 2, a side surface of the installation box 4 close to the guide rail 1 is a first side surface 41, a side surface of the installation box 4 far from the guide rail 1 is a second side surface 42, and a side surface of the installation box 4 connected to the first side surface 41 and the second side surface 42 is a third side surface 43. Be provided with slider 5 in the installing box 4, seted up sliding groove 411 on the first side 41 of installing box 4, sliding groove 411's length direction is on a parallel with guide rail 1, and slider 5 stretches out installing box 4 and slider 5 from sliding groove 411 and is close to the first friction disc 51 of fixedly connected with on the lateral wall of guide rail 1, and slider 5 slides along the direction that is on a parallel with guide rail 1 in sliding groove 411. The third side surface 43 of the mounting box 4 is provided with a slide rail, the slide rail is arranged below the first clamping block 71 and extends to the inner wall of the bottom of the mounting box 4, and two side walls of the slide block 5 opposite to the third side surface 43 are respectively provided with a ball slide block (not shown in the figure) matched with the slide rail. When the driving device 3 drives the installation box 4 to move towards the guide rail 1, the sliding block 5 is driven to slide along the linear direction parallel to the guide rail 1 by the friction force generated by the contact between one end of the sliding block 5 exposed out of the installation box 4 and the guide rail 1.

As shown in fig. 2 and fig. 3, the inner wall of the second side surface 42 of the mounting box 4 is slidably connected with a guide block 6, a dovetail groove is formed on the inner side wall of the mounting box 4 contacting with the guide block 6, and a dovetail slider (not shown in the figure) slidably fitting with the dovetail groove is mounted on the side wall of the guide block 6 contacting with the mounting box 4. A return spring 9 is fixedly connected between the top of the guide block 6 and the installation box 4, and the lower surface of the guide block 6 is abutted to the sliding block 5. The guide block 6 has a first contact portion 61 and a second contact portion 62 formed on a surface thereof adjacent to the guide rail 1 in this order from bottom to top. The first contact portion 61 includes a first convex portion 611 and a first concave portion 612, and the second contact portion 62 includes a second convex portion 621 and a second concave portion 622. A first clamping block 71 and a second clamping block 72 are arranged in the installation box 4, a first guide notch 412 and a second guide notch 413 are formed in the first side surface 41, one end of the first clamping block 71 slidably extends out of the first guide notch 412, and one end of the second clamping block 72 slidably extends out of the second guide notch 413. One end of the first clamping block 71 accommodated in the installation box 4 is in sliding fit with the first contact portion 61, one end of the second clamping block 72 accommodated in the installation box 4 is in sliding fit with the second contact portion 62, and elastic pull ropes are fixedly connected between the first clamping block 71 and the third side surface 43 and between the second clamping block 72 and the third side surface 43 respectively. When the slider 5 slides in a direction parallel to the linear direction of the guide rail 1, the slider 5 pushes the guide block 6 to move so that one end of the first clamping block 71 abuts against the first protrusion 611, one end of the second clamping block 72 abuts against the second protrusion 621, the first clamping block 71 and the second clamping block 72 slide in the direction of the guide rail 1, and the other ends of the first clamping block 71 and the second clamping block 72 abut against the guide rail 1 in sequence. The first projection 611 is formed with a first platform 613, the second projection 621 is formed with a second platform 623, when one end of the first clamping block 71 abuts against the guide rail 1, the other end of the first clamping block 71 abuts against the first platform 613, when one end of the second clamping block 72 abuts against the guide rail 1, the other end of the second clamping block 72 abuts against the second platform 623, and the length of the first platform 613 is greater than the length of the second platform 623.

As shown in fig. 4, the surfaces of the first clamping block 71 and the second clamping block 72 close to the guide rail 1 are respectively and fixedly connected with a second friction plate 8 made of a copper alloy material, a plurality of saw-tooth-shaped protrusions 81 are formed on a plane where the second friction plate 8 can contact with the guide rail 1, the roughness of the second friction plate 8 can be increased by the saw-tooth-shaped protrusions 81, the friction between the second friction plate and the guide rail 1 is increased, and a plurality of gaps are formed between the friction plate and the guide rail 1, so that heat generated by friction can be dissipated from the gaps in time, and the generation of sparks due to overhigh temperature caused by friction is avoided.

The specific implementation mode of the scheme is as follows:

when the elevator car moves downwards, the safety gear moves downwards along with the elevator car, the gear seat 2 is in sliding fit with the guide rail 1, and in an initial state, the first clamping block 71 abuts against the first concave part 612 and the second clamping block 72 abuts against the second concave part 622. When the descending speed of the elevator exceeds the limit speed set by the speed limiter of the elevator, the driving device 3 drives the mounting box 4 to move towards the direction close to the guide rail 1 until the slide block 5 is contacted with the guide rail 1, an upward friction force is generated, the slide block 5 slides upwards in the sliding notch 411 under the action of the friction force and pushes the guide block 6 to slide upwards together, the return spring 9 is compressed, the first concave part 612 pushes the first clamping block 71 to approach the guide rail 1 along the direction of the first guiding notch 412, the second concave part 622 pushes the second clamping block 72 to approach the guide rail 1 along the direction of the second guiding notch 413, one end of the first clamping block 71 moves towards the first convex part 611 from the first concave part 612, and one end of the second clamping block 72 moves towards the second convex part 621 from the second concave part 622. When the guide block 6 slides to the first platform 613 on the first protrusion 611 and contacts with the first clamping block 71, the end of the first clamping block 71 exposed out of the installation box 4 abuts against the guide rail 1 to perform preliminary braking on the elevator car, and at this time, the elevator car still continues to slide downwards, and the end of the second clamping block 72 exposed out of the installation box 4 does not contact with the guide rail 1. The slider 5 continues to slide upward along the sliding slot 411 under the action of friction force, pushing the guide block 6 to move upward, the end of the first clamping block 71, which is arranged in the installation box 4, is in sliding fit with the first platform 613, and the second protrusion 621 pushes the second clamping block 72 to slide toward the direction close to the guide rail 1. When the second clamping block 72 slides to abut against the second platform 623, one end of the second clamping block 72 close to the guide rail 1 abuts against the guide rail 1, and at the moment, two ends of the first clamping block 71 abut against the first platform 613 and the guide rail 1 respectively to perform secondary braking until the elevator car is static. When the elevator is static, the driving device 3 drives the installation box 4 to move towards the direction far away from the guide rail 1, the guide block 6 and the sliding block 5 are far away from the guide rail 1 along with the installation box 4, the first clamping block 71 and the second clamping block 72 reset under the action of the elastic pull rope, the restoring force on the reset spring 9 pushes the guide block 6 to reset downwards, the guide block 6 pushes the sliding block 5 to slide downwards until the bottom surface of the sliding block 5 is abutted against the bottom surface of the installation box 4, and the elevator can run normally.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a from box elevator safety tongs of taking buffer function, includes pincers seat (2), offer on pincers seat (2) with guide rail (1) sliding fit's spout (21), its characterized in that: two clamping assemblies are arranged in the pliers seat (2), the clamping assemblies are symmetrically arranged by taking the center line of the sliding groove (21) as a symmetry axis, each clamping assembly comprises an installation box (4), the installation boxes (4) are in sliding fit with the pliers seat (2), a driving device (3) is arranged in the pliers seat (2), and the driving device (3) is used for driving the installation boxes (4) to move towards the guide rail (1);

the side face, close to the guide rail (1), of the installation box (4) is a first side face (41), the side face, far away from the guide rail (1), of the installation box (4) is a second side face (42), the side face, connected with the first side face (41) and the second side face (42), of the installation box (4) is a third side face (43), a sliding block (5) is installed on the installation box (4) in a sliding mode, one end of the sliding block (5) penetrates through the first side face (41), and when the installation box (4) is driven to move towards the guide rail (1) by the driving device (3), one end, exposed out of the installation box (4), of the sliding block (5) is in contact with the guide rail (1) to generate friction force to drive the sliding block (5) to slide along a linear direction parallel to the guide rail;

the guide block (6) is connected to the second side face (42) on the installation box (4) in a sliding mode, a return spring (9) is fixedly connected between the upper end of the guide block (6) and the installation box (4), the lower end of the guide block (6) is abutted to the sliding block (5), a first contact part (61) and a second contact part (62) are formed on the side face, close to the guide rail (1), of the guide block (6), the first contact part (61) comprises a first convex part (611) and a first concave part (612), the second contact part (62) comprises a second convex part (621) and a second concave part (622),

a first clamping block (71) and a second clamping block (72) are arranged in the installation box (4), one end of the first clamping block (71) penetrates through a first side surface (41) on the installation box (4) in a sliding manner, the second clamping block (72) penetrates through the first side surface (41) on the installation box (4) in a sliding manner, one end, accommodated in the installation box (4), of the first clamping block (71) is in sliding fit with the first contact part (61), one end, accommodated in the installation box (4), of the second clamping block (72) is in sliding fit with the second contact part (62), when the sliding block (5) slides along a linear direction parallel to the guide rail (1), the sliding block (5) pushes the guide block (6) to move so that one end of the first clamping block (71) is abutted against the first convex part (611), one end of the second clamping block (72) is abutted against the second convex part (621), and the first clamping block (71) and the second clamping block (72) are abutted against the guide rail (1), and the other ends of the first clamping block (71) and the second clamping block (72) are sequentially abutted against the guide rail (1).

2. The box elevator safety gear with buffer function of claim 1, characterized in that: the first convex part (611) is provided with a first platform (613), the second convex part (621) is provided with a second platform (623), when one end of the first clamping block (71) abuts against the guide rail (1), the other end of the first clamping block (71) abuts against the first platform (613), when one end of the second clamping block (72) abuts against the guide rail (1), the other end of the second clamping block (72) abuts against the second platform (623), and the length of the first platform (613) is greater than that of the second platform (623).

3. The box elevator safety gear with buffer function of claim 1, characterized in that: install the slide rail on two third sides (43) on install bin (4) respectively, the slide rail sets up in the below of first grip block (71) and extends to the inner wall of install bin (4) bottom surface, install the ball slider with slide rail looks adaptation on the slider.

4. The box elevator safety gear with buffer function of claim 1, characterized in that: the side wall of the sliding block (5) close to the guide rail (1) is fixedly connected with a first friction plate (51), and the first friction plate (51) is in contact with the guide rail (1) to generate friction force.

5. The box elevator safety gear with buffer function of claim 1, characterized in that: elastic pull ropes are fixedly connected between the first clamping block (71) and the second clamping block (72) and the installation box (4) respectively.

6. The box elevator safety gear with buffer function of claim 1, characterized in that: the surfaces, close to the guide rail (1), of the first clamping block (71) and the second clamping block (72) are fixedly connected with second friction plates (8) respectively, and the second friction plates (8) are used for clamping the first clamping block (71) and the second clamping block (72) on the guide rail (1).

7. The box elevator safety gear with buffer function of claim 6, characterized in that: the second friction plate (8) is made of copper alloy materials.

8. The box elevator safety gear with buffer function of claim 6, characterized in that: and a plurality of saw-tooth-shaped protrusions (81) are formed on the plane of the second friction plate (8) which can be contacted with the guide rail (1).