CN212076085U

CN212076085U - Novel progressive safety tongs

Info

Publication number: CN212076085U
Application number: CN202020116214.6U
Authority: CN
Inventors: 任耀武
Original assignee: Suzhou Ling Ao Electromechanical Co ltd
Current assignee: Suzhou Ling Ao Electromechanical Co ltd
Priority date: 2020-01-18
Filing date: 2020-01-18
Publication date: 2020-12-04
Anticipated expiration: 2030-01-18

Abstract

The utility model provides a novel progressive safety gear, which comprises a gear body, a U-shaped spring, two guide blocks, a wedge block and a lifting component, wherein the U-shaped spring is arranged in the gear body, the opening directions of the U-shaped spring and the guide block are consistent, the two guide blocks are symmetrically arranged on the inner side wall of the U-shaped spring, and the two wedge blocks which are oppositely arranged are positioned between the two guide blocks; the lifting assembly comprises a lifting rod and a lifting plate, a middle through groove for a lift guide rail to pass through is formed in the middle of the upper end face of the clamp body, the lifting rod is located on any side of the middle through groove, the end portion of the lifting rod penetrates through the upper end face of the clamp body and is fixedly connected with the lifting plate, and two ends of the lifting plate are movably connected with the two wedge blocks respectively. The utility model discloses a to carry the pull rod setting and lead to groove one side in the middle of the pincers body for carry pull rod and elevator guide rail and keep enough far away distance, guaranteed in the motion process carry pull rod can not take place to interfere the collision with elevator guide rail, improved the security of operation.

Description

Novel progressive safety tongs

Technical Field

The utility model relates to an elevator technical field particularly, relates to a novel progressive safety tongs.

Background

The safety gear is an important safety part of elevator equipment, and can play an important role in safety guarantee when the elevator is overspeed and out of control. The action of the safety gear device is that the rope clamping gear clamps the speed limiter rope through the action of the speed limiter, the speed limiter rope pulls the safety gear link mechanism along with the downward movement of the lift car, and the safety gear link mechanism acts to drive the safety gear wedge block to contact with the guide rail, so that the safety gears on two sides of the guide rail are simultaneously clamped on the guide rail, and the braking and stopping of the lift car are achieved.

The structure of the conventional progressive safety tongs for an elevator is shown in fig. 1 and 2, and the progressive safety tongs comprise a tong body 1 ', a U-shaped spring 2', a guide block 3 ', a wedge block 4', a lifting rod 9 'and a lifting plate, wherein the lifting rod 9' is arranged in the middle of the tong body 1 ', the lifting rod 9' penetrates through the tong body 1 'to be connected with the lifting plate, and the lifting rod 9' is pulled to drive the two wedge blocks 4 'to move upwards and approach each other so as to clamp an elevator guide rail 13'.

However, the above structure has the following disadvantages: (1) because the lifting rod 9 ' is arranged in the middle, the lifting rod 9 ' is positioned at the position close to the end surface of the elevator guide rail 13 ', and the lifting rod 9 ' is easy to generate interference collision with the end surface of the guide rail 13 ' due to uneven movement in the synchronous lifting process, so that the false operation of the safety gear mechanism is caused, and the normal use of the elevator is influenced; (2) the U type spring 2's fixed mode is for connecting on pincers body 1' through single set screw 11 ', because the action of gravity, U type spring 2' afterbody can drop, causes the contact surface of U type spring 2 'and pincers body 1' inner wall to diminish for external force concentrates on set screw 11 ', and stress can cause set screw 11' fracture when too big, thereby causes the safety tongs to become invalid.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel progressive safety tongs, the lifting rod of having solved safety tongs among the prior art very easily takes place to interfere the collision with the elevator guide rail face to and the U type spring tenesmus causes clamping screw to receive the too big problem of stress.

In order to solve the technical problem, the utility model discloses a technical scheme is: a novel progressive safety gear comprises a gear body, a U-shaped spring, two guide blocks, wedge blocks and a lifting assembly, wherein the U-shaped spring is arranged in the gear body, the opening directions of the U-shaped spring and the guide blocks are consistent, the two guide blocks are symmetrically arranged on the inner side wall of the U-shaped spring, the two wedge blocks which are oppositely arranged are positioned between the two guide blocks, a gap is formed between the two wedge blocks, and the gap allows a guide rail of an elevator to pass through;

the lifting assembly comprises a lifting rod and a lifting plate, a middle through groove for a lift guide rail to pass through is formed in the middle of the upper end face of the clamp body, the lifting rod is located on any side of the middle through groove, the end portion of the lifting rod penetrates through the upper end face of the clamp body and is fixedly connected with the lifting plate, and two ends of the lifting plate are movably connected with the two wedge blocks respectively.

Preferably, the front side and the rear side of the guide block are fixedly connected with side plates, the side plates are bent inwards to form flanging parts, one side, close to the guide block, of the wedge block is connected with an embedded plate, and the embedded plate is inserted into the flanging parts and is in sliding connection with the flanging parts.

Preferably, a roller member is disposed between the guide block and the wedge, the roller member includes a plurality of rollers disposed in parallel and a sleeve disposed between the plurality of rollers, and the sleeve is fixedly connected to the side plate.

As an optimal scheme, an upper chute and a lower chute are respectively formed in the upper end and the lower end of the guide block, a first limiting plate is fixedly arranged on the inner side wall of the clamp body below the guide block, a second limiting plate is arranged on the inner wall of the top end of the clamp body above the guide block, and the first limiting plate and the second limiting plate are respectively matched with the lower chute and the upper chute.

Preferably, each side of the U-shaped spring is fixedly connected to the side wall of the pincer body through two fixing screws, and a gap is formed between the U-shaped spring and the side wall of the pincer body.

Preferably, two elliptical holes are formed in two ends of the lifting plate, locking screws are inserted into the elliptical holes, and the end portions of the locking screws are fixedly connected with the wedge blocks.

Preferably, the two wedges have a strip-shaped groove on the side close to each other.

Compared with the prior art, the beneficial effects of the utility model include: the lifting rod is arranged on one side of the through groove in the middle of the clamp body, so that the lifting rod and the elevator guide rail keep a sufficiently long distance, the lifting rod is ensured not to generate interference collision with the elevator guide rail in the movement process, and the operation safety is improved; and each side of the U-shaped spring is fixed by two fixing screw rods, so that the contact surface between the U-shaped spring and the inner wall of the clamp body is ensured to be large enough, and the problem of overlarge stress acting on the fixing screw rods is avoided.

Drawings

The disclosure of the present invention is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:

fig. 1 is a schematic view of a progressive safety gear according to the prior art;

FIG. 2 is a top view of a prior art progressive safety gear;

fig. 3 is a schematic structural view of the novel progressive safety gear in the embodiment of the present invention;

fig. 4 is an exploded view of the novel progressive safety gear in an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

reference numbers in the figures: the clamp comprises a clamp body 1, a U-shaped spring 2, a guide block 3, an upper sliding groove 301, a lower sliding groove 302, a wedge block 4, an embedded plate 401, a first limiting plate 5, a roller component 6, a side plate 7, a flanging part 701, a lifting plate 8, a lifting rod 9, a locking screw rod 10, a fixing screw rod 11 and a middle through groove 12.

Detailed Description

It is easily understood that, according to the technical solution of the present invention, a plurality of alternative structural modes and implementation modes can be proposed by those skilled in the art without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.

An embodiment according to the present invention is shown in conjunction with fig. 3 and 4. The utility model provides a novel progressive safety tongs, includes the pincers body 1, U type spring 2, guidance piece 3, voussoir 4 and carries and draws the subassembly, and U type spring 2 sets up inside the pincers body 1, and both opening directions are unanimous, has the gap between U type spring 2 and the 1 lateral wall of the pincers body. When the pliers are subjected to extrusion force, two sides of the U-shaped spring 2 are opened to be close to the side wall of the pliers body 1, and a gap between the U-shaped spring 2 and the side wall of the pliers body 1 is reduced.

Two system guide block 3 pass through fixing screw 11 symmetry and set up on the 2 inside walls of U type spring, and the fixing screw 11 of every side system guide block is two, and fixing screw 11 passes through and continues to pass through U type spring 2 behind the system guide block 3 and reconnects on the clamp body 1, and two relative voussoirs 4 that set up are located between two system guide block 3, and have the clearance between two voussoirs 4, and the clearance allows the guide rail of elevator to pass through.

Two system guide block 3 are "eight" font setting, and system guide block 3 is the main inclined plane towards 4 one sides of voussoir, and 4 one sides of voussoir towards system guide block 3 are vice inclined plane, and main inclined plane and vice inclined plane are parallel, and two voussoir 4 are close to each other one side be vertical plane, that is to say with elevator guide rail plane parallel.

As shown in fig. 5, side plates 7 are fixedly connected to the front and rear sides of the guide block 3, the side plates 7 are bent inward to form a burring part 701, an insertion plate 401 is connected to the wedge 4 on the side close to the guide block 3, and the insertion plate 401 is inserted into the burring part 701 and slidably connected thereto. A roller member 6 is provided between the guide block 3 and the wedge 4, the roller member 6 including a plurality of rollers arranged in parallel and a sleeve provided between the plurality of rollers, the sleeve being fixedly connected to the side plate 7. When the wedge 4 moves, the roller member 6 is subjected to an upward component force of the wedge 4, and the roller rotates, so that friction between the guide block 3 and the wedge 4 is reduced.

Furthermore, an upper chute 301 and a lower chute 302 are respectively arranged at the upper end and the lower end of the guide block 3, a first limiting plate 5 is fixedly arranged on the inner side wall of the caliper body 1 below the guide block 3, a second limiting plate (not shown in the figure) is arranged on the inner wall of the top end of the caliper body 1 above the guide block 3, and the first limiting plate 5 and the second limiting plate are respectively matched with the lower chute 302 and the upper chute 301. When the guide shoe 3 is pressed, it can slide outward along the upper and

lower slide grooves

301 and 302.

In this embodiment, the lifting assembly includes a lifting rod 9 and a lifting plate 8, a middle through groove 12 for passing the elevator guide rail is provided at the middle position of the upper end surface of the caliper body 1, the lifting rod 9 is located at any side of the middle through groove 12, the end portion of the lifting rod passes through the upper end surface of the caliper body 1 and is fixedly connected with the lifting plate 8, and two ends of the lifting plate 8 are respectively movably connected with the two wedge blocks 4.

Specifically, two elliptical holes are formed in two ends of the lifting plate 8, a locking screw rod 10 is inserted in each elliptical hole, and the end portion of each locking screw rod 10 is fixedly connected with the wedge block 4.

Furthermore, the two wedges 4 have a strip-shaped recess on the side adjacent to each other for increasing the friction against the elevator guide rails.

The utility model discloses a novel progressive safety tongs takes place to carry when the lifting rod and draws the action after, and lifting rod 9 drives lifting plate 8 for 4 upward movement of voussoir, the guidance piece atress that is located the voussoir outside slides to the outside, thereby 2 atresss of U type spring open and produce the reaction force, and act on voussoir 4 with the reaction force, make two voussoir 4 be close to each other, press from both sides tight elevator guide rail, realize safety tongs's braking process.

The technical scope of the present invention is not limited to the content in the above description, and those skilled in the art can make various modifications and alterations to the above embodiments without departing from the technical spirit of the present invention, and these modifications and alterations should fall within the protection scope of the present invention.

Claims

1. The novel progressive safety gear is characterized by comprising a gear body (1), a U-shaped spring (2), guide blocks (3), wedge blocks (4) and a lifting assembly, wherein the U-shaped spring (2) is arranged inside the gear body (1), the opening directions of the U-shaped spring and the guide blocks are consistent, the two guide blocks (3) are symmetrically arranged on the inner side wall of the U-shaped spring (2), the two wedge blocks (4) which are oppositely arranged are positioned between the two guide blocks (3), a gap is formed between the two wedge blocks (4), and the gap allows a guide rail of an elevator to pass through;

the lifting assembly comprises a lifting rod (9) and a lifting plate (8), a middle through groove (12) through which a ladder guide rail can pass is formed in the middle of the upper end face of the clamp body (1), the lifting rod (9) is located on any side of the middle through groove (12), the end portion of the lifting rod penetrates through the upper end face of the clamp body (1) and is fixedly connected with the lifting plate (8), and two ends of the lifting plate (8) are movably connected with the two wedge blocks (4) respectively.

2. The novel progressive safety gear according to claim 1, characterized in that side plates (7) are fixedly connected to the front and rear sides of the guide block (3), the side plates (7) are bent inward to form a flanging part (701), an embedded plate (401) is connected to one side of the wedge block (4) close to the guide block (3), and the embedded plate (401) is inserted into the flanging part (701) and is in sliding connection with the flanging part.

3. A new progressive safety gear according to claim 2, characterised in that a roller member (6) is provided between the guide block (3) and the wedge (4), said roller member (6) comprising a plurality of rollers arranged in parallel and a sleeve arranged between the plurality of rollers, said sleeve being fixedly connected to the side plates (7).

4. The novel progressive safety gear according to claim 1, wherein an upper chute (301) and a lower chute (302) are respectively formed at the upper end and the lower end of the guide block (3), a first limiting plate (5) is fixedly arranged on the inner side wall of the gear body (1) below the guide block (3), a second limiting plate is arranged on the inner wall of the top end of the gear body (1) above the guide block (3), and the first limiting plate (5) and the second limiting plate are respectively matched with the lower chute (302) and the upper chute (301).

5. The novel progressive safety gear according to claim 1, characterized in that each side of the U-shaped spring (2) is fixedly connected to the side wall of the gear body (1) through two fixing screws (11), and a gap is formed between the U-shaped spring (2) and the side wall of the gear body (1).

6. The novel progressive safety gear according to claim 1, wherein two elliptical holes are formed at two ends of the lifting plate (8), locking screws (10) are inserted into the elliptical holes, and the ends of the locking screws (10) are fixedly connected with the wedge blocks (4).

7. A new progressive safety gear according to claim 1, characterised in that the two wedges (4) have a strip-shaped groove on the side adjacent to each other.