CN215804023U - Lead screw locking device - Google Patents

Abstract

The utility model belongs to the technical field of rail transit equipment, and particularly relates to a lead screw locking device, which comprises a main structure, a lead screw, a ratchet wheel disc, a mounting seat, a steel wire rope assembly, a pawl, an unlocking disc, a reset spring and an electromagnet, wherein the lead screw is connected with the ratchet wheel disc, the mounting seat is independently arranged above the ratchet wheel disc, 1-3 groups of steel wire rope assemblies, the pawl, the unlocking disc, the reset spring and the electromagnet are arranged on the mounting seat, the structure is simple and reliable, the pawl can bear larger torque, and electric unlocking can be realized through the electromagnet or an air cylinder: the electromagnet or the air cylinder acts to push the pawl to rotate upwards to separate the pawl from the ratchet wheel disc, and the screw rod rotates towards the door opening direction to complete unlocking; manual unlocking can also be achieved through the composition of steel wire ropes: the unlocking disc is pulled to rotate through the steel wire rope assembly, the pawl is pushed to rotate upwards when the unlocking disc rotates, the pawl is separated from the ratchet disc, and the screw rod rotates towards the door opening direction to complete unlocking.

Description

Lead screw locking device

The technical field is as follows:

the utility model belongs to the technical field of rail transit equipment, and particularly relates to a screw rod locking device which is applied to door systems of various rail transit vehicles, in particular to subways and intercity railway vehicles.

Background art:

with the high-speed development of subways and intercity railways, the demand of vehicle doors is larger and larger, and the quality requirement is higher and higher. The vehicle door provides a passage for a driver and passengers to get in and out of the vehicle, isolates external interference, lightens side impact to a certain extent, protects passengers, and is related to the shape of the vehicle door in the appearance of the vehicle. The quality of the car door is mainly reflected in the anti-collision performance, the sealing performance and the opening and closing convenience. The opening and closing convenience is closely related to the performance of the locking device, and the locking device in the prior art has complex structure and long action time, such as: the screw rod braking device for the automatic door of the vehicle disclosed in the chinese patent 202020324288.9 comprises a driving motor and a screw rod transmission mechanism, wherein a brake box is arranged between the driving motor and the screw rod transmission mechanism, and the brake box comprises a brake box body, a main brake, an auxiliary brake, an unlocking disc, a transmission main shaft, a first bearing, a third bearing, a second bearing and an axial guide mechanism; the main brake is installed with the transmission main shaft through a first bearing, the auxiliary brake is installed with the brake box body through a second bearing, a driving disc is arranged on the transmission main shaft, an unlocking disc is coaxially installed between the driving disc and the main brake, the main brake is arranged in the brake box body, the main brake and the brake box body are installed together through an axial guide mechanism, the main brake moves in a reciprocating mode along the axial lead of the transmission main shaft, and a spring reset mechanism is arranged between the main brake and the brake box body; the head of the transmission main shaft is installed with the brake box body through a third bearing, the tail of the transmission main shaft is provided with a sleeve type coupler, the end head of the tail of the transmission main shaft is installed in the sleeve type coupler and is installed with the sleeve type coupler in a sliding mode, and the sleeve type coupler is in driving connection with the lead screw transmission mechanism; the first transmission gear ring on the main brake and the second transmission gear ring on the auxiliary brake are oppositely arranged and can be mutually meshed; the disc surface of the driving disc is provided with a plurality of spiral lifting type convex surfaces, the middle part of the driving disc is provided with at least two delay transmission mechanisms, and the delay transmission mechanisms are in transmission connection with the sleeve type coupling; the unlocking disc comprises a cylindrical main body, a plurality of roller carriers are arranged at the end part of the cylindrical main body, rollers are arranged on the roller carriers, the rollers are matched with the spiral lifting type convex surfaces arranged on the driving disc to operate, and at least three rotary dampers are distributed around the cylindrical main body of the unlocking disc; the sleeve type coupling is provided with a one-way bearing, and the auxiliary brake is installed together with the sleeve type coupling through the one-way bearing; chinese patent 201620588022.9 discloses a door locking mechanism, comprising: the guide post is arranged on the bearing support, two sliding blocks are arranged on the guide post, the two sliding blocks are connected with two doors of a passenger car in a one-to-one correspondence manner, the two sliding blocks are oppositely arranged and can slide back and forth on the guide post, a support is arranged at the position, between the two sliding blocks, of the guide post, a rotating body is arranged on the support, a torsion spring is connected between the rotating body and the support, two lock hooks with opposite directions are arranged at two ends of the rotating body, lock pins are arranged on the two sliding blocks, when the rotating body rotates to a first position, the two lock hooks can be correspondingly hooked with the lock pins one by one, when the rotating body rotates to a second position, the two lock hooks are separated from the lock pins, a pull rod assembly and a driving device are arranged on the bearing support, and the pull rod assembly is respectively connected with the driving device and the rotating body, the driving device drives the rotating body to rotate from the first position to the second position through the pull rod assembly; chinese patent 201120247926.2 discloses a door lock fastener, including setting up motor, gear drive in the shell, gear drive is including intermeshing's pinion and gear wheel transfer line, the pinion is directly nested in on the output shaft of motor, the motor shaft with gear wheel transfer line parallel arrangement, just the cover is equipped with nut stop device on the gear wheel transfer line, nut stop device and a driving frame axial connection be provided with a trigger switch on the direction of travel of driving frame, trigger switch and motor are connected to control circuit and power through the wire respectively. Therefore, a screw locking device with simple structure, reliable locking and low cost needs to be developed to meet the market demand.

The utility model content is as follows:

the utility model aims to overcome the defects in the prior art and design a screw locking device which provides larger torque by means of a simple and reliable structure.

In order to achieve the aim, the main structure of the lead screw locking device comprises a lead screw, a ratchet wheel disc, a mounting seat, a steel wire rope assembly, a pawl, an unlocking disc, a return spring and an electromagnet; the lead screw is connected with the ratchet wheel disc, a mounting seat is independently arranged above the ratchet wheel disc, and 1-3 groups of steel wire rope assemblies, pawls, an unlocking disc, a reset spring and electromagnets are arranged on the mounting seat.

The steel wire rope assembly is connected with the unlocking disc, and the pawl is connected with the return spring.

The electromagnet according to the present invention can be replaced with a cylinder.

Compared with the prior art, the utility model has simple and reliable structure, the pawl can bear larger torque, and the electric unlocking can be realized through the electromagnet or the air cylinder: the electromagnet or the air cylinder acts to push the pawl to rotate upwards to separate the pawl from the ratchet wheel disc, and the screw rod rotates towards the door opening direction to complete unlocking; manual unlocking can also be achieved through the composition of steel wire ropes: the unlocking disc is pulled to rotate through the steel wire rope assembly, the pawl is pushed to rotate upwards when the unlocking disc rotates, the pawl is separated from the ratchet disc, and the screw rod rotates towards the door opening direction to complete unlocking.

Description of the drawings:

fig. 1 is a schematic diagram of the principle of the main structure of the present invention.

Fig. 2 is a schematic structural view of a main body of the return spring according to the present invention.

Fig. 3 is a schematic view of the unlocking state of the present invention.

The specific implementation mode is as follows:

the utility model is further described by way of example with reference to the accompanying drawings.

Example 1:

the main structure of the floor device of the screw locking device related to the embodiment comprises a screw 1, a ratchet wheel disc 2, a mounting seat 3, a steel wire rope assembly 4, a pawl 5, an unlocking disc 6, a return spring 7 and an electromagnet 8; the lead screw 1 of cylindrical structure is connected with the ratchet wheel dish 2 of disc structure, and the top of ratchet wheel dish 2 independently is provided with mount pad 3, is provided with 2 groups wire rope on the mount pad 3 and constitutes 4, the pawl 5 of falling F shape structure, have the unblock dish 6 of jag structure, helical structure's reset spring 7 and electro-magnet 8, and wire rope constitutes 4 and is connected with unblock dish 6, and pawl 5 is connected with reset spring 7.

When the screw locking device related to the embodiment is used, the screw 1 is fixedly connected to a door mechanism of a vehicle door; under a normal state, the pawl 5 is meshed with the ratchet wheel disc 2 under the action of the return spring 7, and the lead screw 1 can only rotate towards a door closing direction and cannot rotate towards a door opening direction, so that the vehicle door is in a locking state, and the locking safety can be ensured when the power is off; when the electric unlocking is carried out, the electromagnet 8 acts to push the pawl 5 to rotate upwards, so that the pawl is disengaged from the ratchet wheel disc 2, and the screw rod 1 rotates towards the door opening direction to realize the unlocking; when the unlocking is carried out manually, the unlocking disc 6 is pulled to rotate through the steel wire rope assembly 4, the pawl 5 is pushed to rotate upwards when the unlocking disc 6 rotates, the pawl is separated from the ratchet wheel disc 2, and the screw rod 1 rotates towards the door opening direction, so that unlocking is realized.

Claims (3)

1. A lead screw locking device is characterized in that the main structure comprises a lead screw, a ratchet wheel disc, a mounting seat, a steel wire rope, a pawl, an unlocking disc, a reset spring and an electromagnet; the lead screw is connected with the ratchet wheel disc, a mounting seat is independently arranged above the ratchet wheel disc, and 1-3 groups of steel wire rope assemblies, pawls, an unlocking disc, a reset spring and electromagnets are arranged on the mounting seat.

2. A lead screw locking device as set forth in claim 1, wherein the cable assembly is connected to the unlocking plate and the pawl is connected to the return spring.

3. A lead screw locking device according to claim 1 or 2, characterised in that the electromagnet is replaced by a pneumatic cylinder.

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