CN221295802U - Electric triggering type safety tongs device - Google Patents

Abstract

The application discloses an electric triggering type safety tongs device, which belongs to the field of elevator safety and comprises a supporting body connected with an elevator car, a progressive safety tongs moving on the supporting body along a direction perpendicular to the moving direction of the elevator car, a triggering mechanism arranged on the supporting body and used for driving the progressive safety tongs to move for braking, and an electric resetting mechanism arranged on the supporting body and used for driving the progressive safety tongs to move for restoring braking; the progressive safety tongs comprise a tongs seat which is slidably arranged on a supporting body, a friction block component which is fixedly arranged on the tongs seat and corresponds to one side of the car guide rail and moves along with the tongs seat to be close to or far away from the car guide rail, and a wedge block which corresponds to one side of the car guide rail on the tongs seat and moves to be close to or far away from the car guide rail. The safety tongs device is simple in structure and small in size, can be suitable for being installed and used in a narrow space, can achieve timeliness of braking of the elevator car, and guarantees safety of the elevator car.

Description

Electric triggering type safety tongs device

Technical Field

The application relates to the technical field of elevator safety, in particular to an electric triggering type safety tongs device.

Background

Most of the existing elevator safety tongs are mechanically triggered, after the elevator overspeed, the speed limiter acts, and the safety tongs are pulled up through the speed limiter steel wire rope, so that the safety tongs are braked. The disadvantage of this approach is that the greater number of speed limiter and pull-up elements results in a longer response time for the speed limiter-safety gear system, and the speed limiter and pull-up elements may change in speed after prolonged operation, resulting in malfunction or inactivity, affecting the safety of the elevator.

Through investigation, the Chinese patent application with publication number of CN105035905A discloses a hydraulic electronic safety tongs system, which comprises a safety tongs pull rod mechanism, a hydraulic station, a fault detection mechanism and a car, wherein the safety tongs pull rod mechanism is connected with the hydraulic station, the hydraulic station is electrically connected with the fault detection mechanism, and the safety tongs pull rod mechanism, the hydraulic station and the fault detection mechanism are all arranged on the car. This safety tongs system utilizes fault detection mechanism to come the trouble to the elevator, and when breaking down, fault detection mechanism feeds back to the hydraulic pressure station, triggers the safety tongs action through hydraulic pressure station control safety tongs pull rod mechanism, and though realized braking the elevator car, hydraulic pressure station structure is complicated, and is bulky, leads to safety tongs system whole occupation space big, is not applicable to narrow and small space and uses, just is inconvenient for the installation.

Accordingly, the present application provides an electrically triggered safety gear device to solve the above-mentioned problems.

SUMMARY OF THE PATENT FOR INVENTION

(One) solving the technical problems

The application provides an electrically-triggered safety tongs device, which aims to solve the problems that the existing electronic safety tongs system provided in the background art is complex in structure, large in size and difficult to install and use in a narrow space.

(II) technical scheme

In order to achieve the above purpose, the present application provides the following technical solutions: an electrically triggered safety tongs device comprises a supporting body connected with an elevator car, a progressive safety tongs moving on the supporting body along a direction perpendicular to the moving direction of the elevator car, a trigger mechanism arranged on the supporting body and used for driving the progressive safety tongs to move for braking, and an electric reset mechanism arranged on the supporting body and used for driving the progressive safety tongs to move for restoring braking;

The progressive safety tongs comprise a tongs seat which is slidably arranged on the supporting body, a friction block component which is arranged on the tongs seat and corresponds to one side of the car guide rail and moves along with the tongs seat to be close to or far away from the car guide rail, and a wedge block which is arranged on the tongs seat and corresponds to one side of the car guide rail, which is far away from the friction block component, to be close to or far away from the car guide rail. The safety tongs are triggered to act through the triggering mechanism and the electric resetting mechanism, so that the braking and the restoration braking of the elevator car are realized, the safety of the operation of the elevator can be effectively ensured, the volume of the safety tongs can be effectively reduced, and the safety tongs are suitable for installation and use in different spaces.

Preferably, the trigger mechanism comprises trigger springs symmetrically arranged on one side of the clamp seat, and two ends of each trigger spring are fixedly connected with the clamp seat and the supporting body respectively.

Preferably, the support body is fixedly provided with a spring seat connected with one end, far away from the clamp seat, of the trigger spring, and the spring seat is provided with a support rod axially inserted into the trigger spring.

Preferably, the electric reset mechanism comprises an electromagnet fixedly arranged between the corresponding two trigger springs on the supporting body and an armature arranged on the clamp seat and corresponding to the electromagnet.

Preferably, the support body is movably provided with a positioning pin fixedly connected with the electromagnet, a second disc spring is sleeved on the positioning pin, and two ends of the second disc spring are respectively connected with the support body and the electromagnet.

Preferably, the safety gear further comprises a cable structure arranged on the support body for pulling the clamp seat to move so that the wedge blocks are far away from the car guide rail.

Preferably, the cable structure comprises a fixed cylinder fixedly arranged at one side corresponding to the trigger spring and a cable axially penetrating through the fixed cylinder and fixedly connected with the clamp seat.

Preferably, the safety tongs device further comprises a first verification switch fixedly arranged on the supporting body and corresponding to the top of the tongs seat, and a second verification switch fixedly arranged on the supporting body and corresponding to one side, far away from the trigger mechanism, of the tongs seat, wherein the top of the tongs seat is fixedly provided with a fixing block used for being in contact with the first verification switch.

Preferably, the friction block component comprises a first guide shoe fixedly arranged on the clamp seat at a position corresponding to one side of the car guide rail, a fixed pin movably arranged on the clamp seat and in threaded connection with the first guide shoe, a first disc spring sleeved on the fixed pin, a friction block slidingly arranged in the first guide shoe and used for contacting with the car guide rail, and a buffer structure arranged at the bottom end of the clamp seat and used for limiting the movement of the friction block; two ends of the friction block are respectively connected with the top wall of the clamp seat and the buffer structure; and two ends of the first disc spring are respectively connected with the first guide shoe and the clamp seat.

Preferably, the buffer structure comprises a positioning rod fixedly arranged at the bottom of the clamp seat, a sliding block slidably mounted on the positioning rod and fixedly connected with one end, far away from the clamp seat, of the friction block, and a buffer spring sleeved on the positioning rod, wherein two ends of the buffer spring are respectively connected with the sliding block and one end, far away from the clamp seat, of the positioning rod.

(III) beneficial effects

This safety tongs device replaces hydraulic pressure station and safety tongs pulling mechanism through electro-magnet and trigger spring, can effectually reduce the volume of safety tongs device, when making its installation that can be applicable to narrow and small space use, can realize the timeliness of elevator car braking, guarantees the security of elevator car.

Drawings

FIG. 1 is a schematic view of an electrically triggered safety gear assembly;

FIG. 2 is a schematic diagram of the structure of a progressive safety gear in an electrically triggered safety gear device;

fig. 3 is a schematic structural view of an electrically triggered safety gear device in use.

In the figure:

1. A support body; 11. a clamping plate; 12. a mounting hole; 2. progressive safety tongs; 21. a clamp seat; 211. a second guide shoe; 212. the second limit bolt; 213. a fixed block; 214. a guide groove; 22. a friction block member; 221. a first guide shoe; 222. a fixing pin; 223. a first disc spring; 224. a friction block; 225. a buffer structure; 2251. a positioning rod; 2252. a slide block; 2253. a buffer spring; 23. wedge blocks; 231. a first limit bolt; 3. a trigger mechanism; 31. a trigger spring; 32. a spring seat; 321. a support rod; 4. an electrical reset mechanism; 41. an electromagnet; 42. an armature; 43. a positioning pin; 44. a second disc spring; 5. a guy cable structure; 51. a fixed cylinder; 52. and (5) a inhaul cable.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Example 1

The embodiment provides an electrically triggered safety gear device, as shown in fig. 1, 2 and 3, which comprises a supporting body 1 connected with an elevator car, a progressive safety gear 2 moving on the supporting body 1 along a direction perpendicular to the moving direction of the elevator car, a trigger mechanism 3 arranged on the supporting body 1 and used for driving the progressive safety gear 2 to move for braking, and an electrical reset mechanism 4 arranged on the supporting body 1 and used for driving the progressive safety gear 2 to move for restoring braking; wherein, the supporting body 1 is provided with a mounting hole 12 for positioning bolts to pass through to fix the supporting body 1 on the elevator car.

The progressive safety gear 2 comprises a gear seat 21 which is slidably mounted on the supporting body 1, a friction block part 22 which is arranged on the gear seat 21 at a position corresponding to one side of the car guide rail and moves along with the gear seat 21 to be close to or far away from the car guide rail, and a wedge block 23 which is arranged on the gear seat 21 and moves corresponding to one side of the car guide rail away from the friction block part 22 to be close to or far away from the car guide rail. The two ends of the jaw seat 21 are provided with guide grooves 214, and the support body 1 is fixedly provided with clamping plates 11 inserted into the guide grooves 214.

When the elevator car is braked, the electric reset mechanism 4 is disconnected, the clamp seat 21 moves on the supporting body 1 under the action of the trigger mechanism 3, the wedge block 23 is driven to move close to the elevator car guide rail, so that the wedge block 23 is contacted with the elevator car guide rail, when the elevator car continuously descends, under the action of friction force of the elevator car guide rail and the wedge block 23, the wedge block 23 moves upwards, the clamp seat 21 moves reversely, the friction block 224 moves along with the clamp seat 21 to be contacted with the surface of the elevator car guide rail far away from the wedge block 23, and the purpose of braking is realized under the friction action of the wedge block 23 and the friction block 224 and the elevator car guide rail. When the car continues to move upwards, the wedge 23 moves away from the car guide rail on the clamp seat 21 under the action of gravity of the wedge 23, so that the car guide rail is released, and the elevator car is braked again.

It should be noted that, in order to improve the stability of the movement of the wedge 23, so that the wedge 23 can move smoothly on the jaw seat 21, a second guide shoe 211 is fixedly installed on a side of the jaw seat 21 away from the friction block member 22, and the wedge 23 is slidably installed in the second guide shoe 211. In order to adjust the position of the wedge 23 during braking, so that the friction force during braking can be adjusted according to actual requirements, a first limit bolt 231 which is in contact with the top wall of the caliper seat 21 is fixedly arranged on the wedge 23; in order to prevent the wedge 23 from being separated from the caliper seat 21 when the brake is restored, the wedge 23 is always positioned on the second guide shoe 211, and the second guide shoe 211 is fixedly provided with a second limit bolt 212 for contacting with one end of the wedge 23 away from the limit bolt 231.

Specifically, the triggering mechanism 3 includes a triggering spring 31 symmetrically disposed at one side of the jaw seat 21, and two ends of the triggering spring 31 are fixedly connected with the jaw seat 21 and the supporting body 1 respectively; when the elevator car is braked, the power supply of the electric triggering mechanism 4 is disconnected, and under the action of the elastic force of the triggering spring 31, the clamp seat 21 is pushed to move so that the wedge block 23 moves to be close to the car guide rail, and the friction block component 22 is matched with the elevator car to brake the elevator car.

Further, in order to ensure stability of the trigger spring 31, a spring seat 32 connected to one end of the trigger spring 31 far away from the jaw seat 21 is fixedly installed on the support body 1, and a support rod 321 axially inserted into the trigger spring 31 is provided on the spring seat 32; when the trigger spring 31 drives the clamp seat 21 to move, the trigger spring 31 axially extends along the support rod 321 to be close to the clamp seat 21 so as to push the clamp seat 21 to move; and when the brake is restored, the caliper seat 21 moves reversely, so that the trigger spring 31 extends and compresses reversely along the axial direction of the support rod 321, and the support rod 321 can support the trigger spring 31 effectively and simultaneously enable the trigger spring 31 to stretch and retract stably on the support rod 321.

More specifically, the electric reset mechanism 4 includes an electromagnet 41 fixedly installed on the support body 1 and between the two corresponding trigger springs 31, and an armature 42 installed on the jaw 21 and corresponding to the electromagnet 41; when braking, the electromagnet 41 is powered off, so that the trigger spring 31 can push the clamp seat 21 to move under the action of the elastic force of the trigger spring; when the elevator car is braked, the electromagnet 41 is electrified, and the armature 42 is attracted after the electromagnet 41 is electrified, so that the clamp seat 21 is driven to move to compress the trigger spring 31, the clamp seat 21 is driven to move, the wedge block 23 is far away from the car guide rail, and the elevator car is braked again.

Further, in order to ensure the stability of the braking of the elevator car, a positioning pin 43 fixedly connected with the electromagnet 41 is movably mounted on the support body 1, a second disc spring 44 is sleeved on the positioning pin 43, and two ends of the second disc spring 44 are respectively connected with the support body 1 and the electromagnet 41; during braking, the wedge block 23 moves on the clamp seat 21 under the action of friction force with the car guide rail, and after the wedge block 23 moves to the inner part of the clamp seat 21 to be in contact with the car guide rail, the clamp seat 21 moves reversely to drive the friction block part 2 to move close to one side of the car guide rail away from the wedge block 23, so that the friction block part 2 is in close contact with the car guide rail.

It will be further appreciated that, due to the gap between the friction block 2 and the car guide rail, in order to allow the friction block 2 to be in close contact with the car guide rail, the jaw 21 will continue to move under the continuous force of the wedge 23 and the car guide rail, at which time the jaw 21 will push the armature 42 and the electromagnet 41 to move, at which time the second disc spring 44 compresses, giving the friction block 2 sufficient travel.

More specifically, the friction block member 22 includes a first guide shoe 221 fixedly disposed on the jaw 21 at a position corresponding to one side of the car guide rail, a fixing pin 222 movably mounted on the jaw 21 and screwed with the first guide shoe 221, a first disc spring 223 sleeved on the fixing pin 222, a friction block 224 slidably mounted in the first guide shoe 221 for contacting the car guide rail, and a buffer structure 225 disposed at a bottom end of the jaw 21 for limiting movement of the friction block 224; two ends of the friction block 224 are respectively connected with the top wall of the clamp seat 21 and the buffer structure 225; both ends of the first disc spring 223 are respectively connected with the first guide shoe 221 and the clamp seat 21.

When the friction block 224 contacts and rubs with the car guide rail, the friction block 224 moves downwards on the first guide shoe 221 under the action of friction force and contacts with the buffer structure 225 to buffer the longitudinal force generated during contact; meanwhile, when the friction block 224 is in contact with the car guide rail, the friction block 224 receives a transverse force moving to one side far away from the car guide rail, and the transverse force generated during contact is buffered through the first disc spring 223, so that the car guide rail is prevented from being damaged in the moment that the friction block 224 is in contact with the car guide rail.

Further, the buffer structure 225 includes a positioning rod 2251 fixedly disposed at the bottom of the jaw seat 21, a sliding block 2252 slidably mounted on the positioning rod 2251 and fixedly connected to one end of the friction block 224 away from the jaw seat 21, and a buffer spring 2253 sleeved on the positioning rod 2251, where two ends of the buffer spring 2253 are respectively connected to the sliding block 2252 and one end of the positioning rod 2251 away from the jaw seat 1; when the friction block 224 is in contact with the car guide rail, the friction block 224 moves on the first guide shoe 221 to push the slide block 2252 to move on the positioning rod 2251, and the downward force of the friction block 224 is buffered by the buffer spring 2253.

Example 2

Unlike embodiment 1, the safety tongs device further comprises a first verification switch 6 fixedly arranged on the supporting body 1 and corresponding to the top of the tongs seat 1, and a second verification switch 7 fixedly arranged on the supporting body 1 and corresponding to the side of the tongs seat 21 away from the trigger mechanism electric reset mechanism 4, wherein a fixing block 213 for contacting with the first verification switch 6 is fixedly arranged on the top of the tongs seat 21.

During braking, the caliper seat 21 moves on the support body 1 to be close to the second verification switch 7, and after the caliper seat 21 is contacted with the second verification switch 7, the second verification switch 7 generates a contact signal to verify the braking triggering state of the safety tongs; when the brake is restored, the caliper seat 21 moves on the support body 1 to drive the fixed block 213 to move close to the first verification switch 6, and after the fixed block 213 contacts with the first verification switch 6, the first verification switch 6 generates a contact signal to verify the brake restoration state of the safety caliper; the states of triggering braking and restoring braking of the safety tongs are detected through the first verification switch 6 and the second verification switch 7, so that the use safety of the safety tongs device can be effectively improved.

Example 3

Unlike embodiments 1 and 2, the safety gear device further includes a cable structure 5 provided on the support body 1 for pulling the clamp seat 21 to move the wedge 23 away from the car guide rail. The cable structure 5 includes a fixing cylinder 51 fixedly disposed at one side of the trigger spring 31, and a cable 52 axially penetrating the fixing cylinder 51 and fixedly connected to the jaw 21.

When the power is off, the electric reset mechanism 4 can be replaced by the inhaul cable 52, so that the elevator is braked again, and when the inhaul cable 52 is pulled, the clamp seat 21 moves on the support body 1 along with the inhaul cable 52, so that the clamp seat 21 is driven to trigger the spring 31 to compress, the wedge block 23 is far away from the car guide rail, and the elevator car is braked again; when braking, after the guy rope 52 is released, the clamp seat 21 moves reversely under the action of the elastic force of the trigger spring 31, so that the wedge block 23 contacts with the car guide rail, and the friction block component 22 is matched to brake the elevator car.

The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art, who is within the scope of the present application, should make equivalent substitutions or modifications according to the technical scheme and the concept of the present application, and should be covered by the scope of the present application.

Claims (10)

1. An electrically triggered safety tongs device characterized by: the safety gear device comprises a supporting body (1) connected with the elevator car, a progressive safety gear (2) which moves on the supporting body (1) along the direction perpendicular to the movement direction of the elevator car, a trigger mechanism (3) which is arranged on the supporting body (1) and used for driving the progressive safety gear (2) to move for braking, and an electric reset mechanism (4) which is arranged on the supporting body (1) and used for driving the progressive safety gear (2) to move for restoring braking;

The progressive safety tongs (2) comprise a tongs seat (21) which is slidably arranged on the supporting body (1), a friction block component (22) which is arranged on the tongs seat (21) at a position corresponding to one side of the car guide rail and moves along with the tongs seat (21) to be close to or far away from the car guide rail, and a wedge block (23) which is arranged on the tongs seat (21) and corresponds to one side of the car guide rail away from the friction block component (22) to move to be close to or far away from the car guide rail.

2. The electrically triggered safety gear arrangement of claim 1, wherein: the trigger mechanism (3) comprises trigger springs (31) symmetrically arranged on one side of the clamp seat (21), and two ends of each trigger spring (31) are fixedly connected with the clamp seat (21) and the supporting body (1) respectively.

3. The electrically triggered safety gear arrangement of claim 2, wherein: the support body (1) is fixedly provided with a spring seat (32) connected with one end, far away from the clamp seat (21), of the trigger spring (31), and the spring seat (32) is provided with a support rod (321) axially inserted into the trigger spring (31).

4. The electrically triggered safety gear arrangement of claim 2, wherein: the electric reset mechanism (4) comprises electromagnets (41) fixedly installed on the outer sides of the supporting body (1) corresponding to the two trigger springs (31) and armatures (42) installed on the clamp base (21) and corresponding to the electromagnets (41).

5. The electrically triggered safety gear arrangement of claim 4, wherein: the support body (1) is movably provided with a locating pin (43) fixedly connected with the electromagnet (41), a second disc spring (44) is sleeved on the locating pin (43), and two ends of the second disc spring (44) are respectively connected with the support body (1) and the electromagnet (41).

6. The electrically triggered safety gear arrangement of claim 2, wherein: the safety gear device further comprises a guy rope structure (5) which is arranged on the supporting body (1) and used for pulling the clamp seat (21) to move so that the wedge block (23) is far away from the car guide rail.

7. The electrically triggered safety tongs device of claim 6, wherein: the inhaul cable structure (5) comprises a fixed cylinder (51) fixedly arranged on one side corresponding to the trigger spring (31) and an inhaul cable (52) axially penetrating through the fixed cylinder (51) and fixedly connected with the clamp seat (21).

8. The electrically triggered safety gear arrangement of claim 1, wherein: the safety tongs device further comprises a first verification switch (6) fixedly arranged on the supporting body (1) and corresponding to the top of the tongs seat (21), and a second verification switch (7) fixedly arranged on the supporting body (1) and corresponding to one side, away from the trigger mechanism, of the tongs seat (21), of the electric reset mechanism (4), wherein a fixed block (213) used for being in contact with the first verification switch (6) is fixedly arranged on the top of the tongs seat (21).

9. The electrically triggered safety gear arrangement of claim 1, wherein: the friction block component (22) comprises a first guide shoe (221) fixedly arranged on the clamp seat (21) at a position corresponding to one side of the car guide rail, a fixed pin (222) movably arranged on the clamp seat (21) and in threaded connection with the first guide shoe (221), a first disc spring (223) sleeved on the fixed pin (222), a friction block (224) slidably arranged in the first guide shoe (221) and used for being in contact with the car guide rail, and a buffer structure (225) arranged at the bottom end of the clamp seat (21) and used for limiting the movement of the friction block (224); two ends of the friction block (224) are respectively connected with the top wall of the clamp seat (21) and the buffer structure (225); two ends of the first disc spring (223) are respectively connected with the first guide shoe (221) and the clamp seat (21).

10. The electrically triggered safety gear arrangement of claim 9, wherein: the buffer structure (225) comprises a positioning rod (2251) fixedly arranged at the bottom of the clamp seat (21), a sliding block (2252) slidably mounted on the positioning rod (2251) and fixedly connected with one end of the friction block (224) away from the clamp seat (21), and a buffer spring (2253) sleeved on the positioning rod (2251), wherein two ends of the buffer spring (2253) are respectively connected with the sliding block (2252) and one end of the positioning rod (2251) away from the clamp seat (21).