CN108726314A - Shift mechanism is electronically activated in safety tongs - Google Patents

Abstract

The invention relates to the technical field of elevators, in particular to an electronic trigger lifting mechanism for safety gear. The electronic trigger lifting mechanism of the safety gear includes an overspeed detection control module installed on the elevator car frame for monitoring the running speed of the elevator. The overspeed detection control module is connected to a linkage lifting mechanism through an electromagnet, and the linkage lifting mechanism is connected to the safety gear transmission. The linkage lifting mechanism includes a swing rod, a crank arm, a lifting arm and a lifting rod. The swing rod is hinged between the electromagnet and the crank arm. It is connected to one end of the vertically arranged lifting rod, and the other end of the lifting rod is connected to the clamp block of the safety gear; when the overspeed detection control module detects that the elevator is overspeeding, the electromagnet acts to pull the crank arm to drive the lifting arm to lift upwards, Then drive the lifting rod to lift up the pincer block of the safety gear, so that the pincer block clamps the guide rail and realizes the braking of the car. Combination of electronic trigger and mechanical lift, more reliable work and faster response.

Description

Safety gear electronically triggers the lifting mechanism

technical field

The invention relates to the technical field of elevators, in particular to an electronic trigger lifting mechanism for safety gear.

Background technique

The current elevator safety gear is mostly triggered mechanically. After the elevator overspeeds, the speed limiter will act, and the safety gear will be pulled by the wire rope of the speed limiter to realize the braking of the safety gear. The disadvantage of this method is that the speed limiter may fail or malfunction after working for a long time, and the response time of this method is longer.

Contents of the invention

In order to overcome the defects of the prior art, the object of the present invention is to provide an electronic trigger pulling mechanism of safety gear with more reliable operation and faster response speed.

In order to achieve the above objectives, the technical solution of the safety gear electronic trigger lifting mechanism of the present invention is:

The electronic trigger lifting mechanism of the safety gear includes an overspeed detection control module installed on the elevator car frame for monitoring the running speed of the elevator. The overspeed detection control module is connected to a linkage lifting mechanism through an electromagnet, and the linkage lifting mechanism is connected to the safety gear transmission. ;The linkage lifting mechanism includes a swing rod, a crank arm, a lifting arm and a lifting rod. The swing rod is hinged between the electromagnet and the crank arm. It is connected to one end of the vertically arranged lifting rod, and the other end of the lifting rod is connected to the clamp block of the safety gear; when the overspeed detection control module detects that the elevator is overspeeding, the electromagnet acts to pull the crank arm to drive the lifting arm to lift upwards, Then drive the lifting rod to lift up the pincer block of the safety gear, so that the pincer block clamps the guide rail and realizes the braking of the car.

Both sides of the overspeed detection control module are equipped with electromagnets and linkage lifting mechanisms.

The crank arm and the lifting arm are fixed on the linkage shaft at a fixed angle, and the linkage shaft is rotatably installed on the car frame.

The end of the lifting arm is provided with a lifting hole, and the upper end of the lifting arm is anti-detachment and is installed in the lifting hole.

Due to the implementation of the above technical solutions, the present invention has the following technical effects compared with the prior art: In the present invention, the overspeed detection control module is used to detect the elevator overspeed and an instruction is issued to trigger the electromagnet action to realize electronic triggering. The safety gear is mechanically lifted, which is more reliable in work and faster in response, and no longer needs the speed limiter and its wire rope and pit tensioning device. The structure is simpler and the cost is lower, which is conducive to improving the market competitiveness of the product.

Description of drawings

Fig. 1 is the schematic diagram of safety gear electronic trigger lifting mechanism and elevator car frame of the present invention;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is A-A sectional view of Fig. 2;

Fig. 4 is a schematic diagram of the working state of the safety gear electronically triggering the lifting mechanism (ie pulling the safety gear).

Detailed ways

The technical solution of the present invention will be described in detail below through specific examples.

As shown in Figures 1 to 4, the safety gear electronic trigger lifting mechanism includes an overspeed detection control module 1 installed on the elevator car frame 5, an electromagnet 2 and a linkage lifting mechanism 3, and the overspeed detection control module 1 and the electromagnet 2 are electrically connected. connection, the linkage lifting mechanism 3 is connected with the safety gear 4 through transmission, the electromagnet 2 is located between the overspeed detection control module 1 and the linkage lifting mechanism 3, and the left and right sides of the overspeed detection control module 1 are equipped with electromagnets 2 and linkage lifting mechanisms. Pull mechanism3.

The linkage lifting mechanism 3 comprises a swing bar 31, a crank arm 32, a lifting arm 33 and a lifting bar 34, the swing bar 31 is hinged between the electromagnet 2 and the crank arm 32, and the crank arm 32 and the lifting arm 33 are at a fixed angle Fixed on the linkage shaft 30, the linkage shaft 30 is rotatably installed on the car frame 5. Lifting arm 33 links to each other with the upper end of the lifting rod 34 that is vertically arranged, and the end of lifting arm 33 is provided with lifting hole, and the upper end of lifting rod 34 passes through lifting hole and is equipped with anti-off piece, prevents lifting rod 34 from downward come out. The lower end of the pull rod 34 is connected with the clamp block of the safety gear 4 . The structure of the safety gear and its clamp block is the prior art, and will not be repeated here.

The running speed of the elevator is monitored in real time through the overspeed detection control module. When the elevator overspeed is detected, an instruction is sent to the electromagnet through the wire to make the electromagnet act. Taking the left side as an example, the electromagnet pulls the arm to the right to drive the linkage shaft Rotating clockwise, the end of the lifting arm is pulled upwards as the linkage shaft rotates, and then the lifting rod is driven to lift the clamp block upwards, so that the clamp block clamps the guide rail on the left side of the car frame, and the safety gear brakes the car. stop running.

In other embodiments, the crank arm and the lifting arm can adopt an integral angular structure, which can be rotated synchronously on the car frame.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (4)

1. shift mechanism is electronically activated in a kind of safety tongs, it is characterised in that：Include being used to monitor electricity on elevator car frame The overspeed detection control module of the terraced speed of service, overspeed detection control module are connected with linkage shift mechanism by electromagnet, connection Dynamic shift mechanism is sequentially connected with safety tongs；Linkage shift mechanism includes that swing rod, connecting lever, lifting arm and lifting rod, swing rod are hinged Between electromagnet and connecting lever, connecting lever is mounted on sedan-chair frame in which can rotate synchronously with lifting arm, and lifting arm is carried with what is be vertically arranged One end of pull rod is connected, and the other end of lifting rod and the pincers block of safety tongs connect；When overspeed detection control module detects elevator When hypervelocity, electromagnet action pulls connecting lever that lifting arm is driven to lift upwards, and then drive lifting rod lifts the pincers of safety tongs upwards Block makes pincers block clamping guide-rail, realizes car braking.

2. shift mechanism is electronically activated in safety tongs according to claim 1, it is characterised in that：Overspeed detection control module Both sides are equipped with electromagnet and linkage shift mechanism.

3. shift mechanism is electronically activated in safety tongs according to claim 1 or 2, it is characterised in that：Connecting lever and lifting arm with Fixed angle is fixed on universal driving shaft, and universal driving shaft is installed in rotation on sedan-chair frame.

4. shift mechanism is electronically activated in safety tongs according to claim 1 or 2, it is characterised in that：The end of lifting arm is set There is lifting hole, the upper end anticreep for lifting arm is installed in lifting hole.