CN220950712U - Reset device of elevator safety tongs - Google Patents

Abstract

The utility model discloses an elevator safety tongs resetting device, which comprises a tongs body, wherein two opposite sliding seats are arranged in the tongs body, the sliding seats are fixedly connected with the tongs body, inclined sliding surfaces are arranged on the inner sides of the sliding seats, the distance between the sliding surfaces of the two sliding seats is gradually increased from bottom to top, two wedge blocks are arranged on the inner sides of the sliding seats, the wedge blocks are respectively connected with the corresponding sliding seats in a sliding manner along the sliding surfaces, vertical braking surfaces are arranged on the inner sides of the wedge blocks, and a channel through which an elevator guide rail can pass is formed between the two opposite braking surfaces; two electric cylinders connected with the pliers body are respectively arranged below the two wedge blocks, the electric cylinders are used for pushing the wedge blocks to move obliquely upwards along the sliding seat, the electric cylinders are respectively connected in a loop, and a push-in-place switch, a push public button and a push button are connected in series in the loop. The utility model can release the safety tongs from the guide rail, realize quick reset and facilitate rescue.

Description

Reset device of elevator safety tongs

Technical Field

The utility model relates to the technical field of safety tongs, in particular to an elevator safety tongs resetting device.

Background

Speed limiters and safety gear are important safety devices for elevators, also called rope protection and overspeed protection. The wire rope of the speed limiter forms a closed loop around the rope wheel and the expansion rope wheel in the pit, and the rope head of the speed limiter is fastened with the car and connected with the safety tongs through a mechanical connecting rod. If the car is overspeed, the speed limiter immediately acts to trigger the rope clamping device to clamp the steel wire rope. When the car descends, the steel wire rope pulls the safety tongs to run so that the safety tongs guide rail generates friction force, the car is rapidly braked on the guide rail, the elevator stops running, at the moment, the elevator safety tongs are only driven to loosen the guide rail by the upward running of the elevator, but the safety tongs are different in tightness degree, if the elevator is not in a door zone and lifted to a certain height when being loaded by 100% and 125%, the elevator is blocked in the middle, the car cannot be moved upwards, and at the moment, the safety tongs can only be disassembled by unloading weights in the car or to the bottom of the car. The safety tongs detached from the bottom of the car have a certain danger for professional technicians, so that the electric resetting device of the remote electric safety tongs is required to be invented, the operation risk is greatly reduced, and the elevator is quickly restored.

Disclosure of utility model

Aiming at the technical problems, the utility model aims at: the reset device for the elevator safety tongs is simple in structure and enables the safety tongs to reset rapidly and reliably.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the elevator safety tongs resetting device comprises a tongs body, wherein two opposite sliding seats are arranged in the tongs body and fixedly connected with the tongs body, inclined sliding surfaces are arranged on the inner sides of the sliding seats, the distance between the sliding surfaces of the two sliding seats is gradually increased from bottom to top, two wedge blocks are arranged on the inner sides of the sliding seats and are respectively connected with the corresponding sliding seats in a sliding manner along the sliding surfaces, vertical braking surfaces are arranged on the inner sides of the wedge blocks, and a channel through which an elevator guide rail can pass is formed between the two opposite braking surfaces; two electric cylinders connected with the pliers body are respectively arranged below the two wedge blocks, the electric cylinders are used for pushing the wedge blocks to move obliquely upwards along the sliding seat, the electric cylinders are respectively connected in a loop, and a push-in-place switch, a push public button and a push button are connected in series in the loop.

Preferably, an emergency running switch and an action knob switch are connected in series in the loop.

Preferably, both said electric cylinders are individually drivable.

Preferably, the slide is connected with the clamp body through bolts.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

The elevator safety tongs resetting device comprises a tongs body, two opposite sliding seats are arranged in the tongs body, the sliding seats are fixedly connected with the tongs body, inclined sliding surfaces are arranged on the inner sides of the sliding seats, the distance between the sliding surfaces of the two sliding seats is gradually increased from bottom to top, two wedges are arranged on the inner sides of the sliding seats and are respectively connected with the corresponding sliding seats in a sliding mode along the sliding surfaces, vertical braking surfaces are arranged on the inner sides of the wedges, a channel through which an elevator guide rail can pass is formed between the two opposite braking surfaces, two electric cylinders connected with the tongs body are respectively arranged below the two wedges, and are used for pushing the wedges to move obliquely upwards along the sliding seats.

Drawings

The technical scheme of the utility model is further described below with reference to the accompanying drawings:

Fig. 1 is a front view of an elevator safety gear resetting device of the present utility model;

Fig. 2 is a circuit diagram of the electric cylinder of the reset device of the elevator safety gear of the present utility model.

Wherein: 1. a clamp body; 2. a slide; 21. a sliding surface; 3. wedge blocks; 31. a braking surface; 4. a channel; 5. an electric cylinder; 6. pushing the in-place switch; 7. pushing the public button; 8. pushing the button; 9. an emergency operation switch; 10. and (3) an action knob switch.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

The elevator safety tongs resetting device comprises a tongs body 1, wherein two opposite sliding seats 2 are arranged in the tongs body 1, the sliding seats 2 are fixedly connected with the tongs body 1, and the sliding seats 2 are connected with the tongs body 1 through bolts. The inner sides of the sliding bases 2 are provided with inclined sliding surfaces 21, and the distance between the sliding surfaces 21 of the two sliding bases 2 is gradually increased from bottom to top. The inner side of the slide seat 2 is provided with two wedges 3, the wedges 3 are respectively connected with the corresponding slide seat 2 in a sliding way along a sliding surface 21, the inner side of each wedge 3 is provided with a vertical braking surface 31, a channel 4 through which an elevator guide rail can pass is formed between the two opposite braking surfaces 31, when the elevator car falls, the overspeed governor slows down the elevator running in overspeed by cutting off a power supply and starting a mechanical brake, the two wedges 3 slide downwards along the slide seat 2 under the action of the traction force of the overspeed governor rope, the elevator guide rail is clamped, and the elevator is stopped on the guide rail by friction and pressure between the wedges 3 and the guide rail.

Two electric cylinders 5 connected with the clamp body 1 are respectively arranged below the two wedges 3, and the electric cylinders 5 are used for pushing the wedges 3 to move obliquely upwards along the slide seat 2. As shown in fig. 2, the electric cylinders 5 are respectively connected in a loop, a push-in-place switch 6, a push public button 7 and a push button 8 are connected in series in the loop, and an emergency running switch 9 and an action knob switch 10 are also connected in series in the loop. The two electric cylinders 5 can be driven individually, and even if one electric cylinder 5 malfunctions, the other electric cylinder 5 can still function. When the motor room maintenance state is reached, the action knob switch 10 is shifted to the action knob state, the public button 7 and the pushing button 8 are pushed and pushed, at the moment, the electric cylinders 5 on two sides push the wedge blocks 3 upwards, so that the wedge blocks 3 are loosened from the guide rails, the electric cylinders 5 are limited by the stroke, the electric cylinders 5 are automatically powered off after reaching, the electric cylinders 5 are automatically reset, the abnormal action of the safety tongs of the speed limiter is responded more quickly, rescue can be realized more quickly, and the personal safety of passengers is ensured.

The elevator safety tongs resetting device is simple in structure, convenient to install and low in cost, abnormal actions of the speed limiter safety tongs can be avoided, the situation that the elevator cannot be normally checked and repaired to ascend due to the fact that the safety tongs are in contact with force acting on a guide rail when the traction force is used for driving and the traction force is insufficient is avoided, manual intervention is not needed, and under the condition that the safety tongs cannot be disassembled under site conditions, objects in a lift car are carried out, and personnel are evacuated, the safety tongs and the guide rail can be loosened by the aid of the elevator safety tongs resetting device in a state that the safety tongs and the guide rail are firmly clamped, and rescue or linkage testing can be rapidly achieved.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present utility model.

Claims (4)

1. An elevator safety tongs resetting means, its characterized in that: the clamp comprises a clamp body, wherein two opposite sliding seats are arranged in the clamp body and fixedly connected with the clamp body, inclined sliding surfaces are arranged on the inner sides of the sliding seats, the distance between the sliding surfaces of the two sliding seats is gradually increased from bottom to top, two wedge blocks are arranged on the inner sides of the sliding seats and are respectively connected with the corresponding sliding seats in a sliding manner along the sliding surfaces, vertical braking surfaces are arranged on the inner sides of the wedge blocks, and a channel through which an elevator guide rail can pass is formed between the two opposite braking surfaces; two electric cylinders connected with the pliers body are respectively arranged below the two wedge blocks, the electric cylinders are used for pushing the wedge blocks to move obliquely upwards along the sliding seat, the electric cylinders are respectively connected in a loop, and a push-in-place switch, a push public button and a push button are connected in series in the loop.

2. The elevator safety gear resetting device of claim 1, wherein: an emergency running switch and an action knob switch are connected in series in the loop.

3. The elevator safety gear resetting device of claim 1, wherein: the two electric cylinders can be driven independently.

4. The elevator safety gear resetting device of claim 1, wherein: the sliding seat is connected with the clamp body through bolts.