Door leaf lock with limiting mechanism

Abstract

The door leaf lock with the limiting mechanism comprises an operating mechanism and locking mechanisms, the operating mechanism rotates and drives the locking mechanisms at the two ends to stretch out or retract at the same time, the operating mechanism comprises a driving rod, an electromagnet is arranged on one side of the operating mechanism, a stop block is hinged to the electromagnet, and a protruding block is arranged on the side wall, close to the electromagnet, of the driving rod. When the door leaf is locked, the electromagnet attracts the stop block, the front end of the stop block abuts against the protruding block, and the locking mechanism is prevented from retracting. The electromagnet limiting device can monitor the unlocking action, unlocking is conducted when the unlocking action is allowed, unlocking cannot be conducted when the unlocking action is not allowed, the reliability of the door leaf locking state is improved, and the train operation safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of rail transportation, in particular to a door leaf lock with a limiting mechanism. Background Art

[0002] At present, urban rail transit is often equipped with emergency evacuation doors for emergency escape. The locking and unlocking devices of emergency escape doors are mainly composed of an operating mechanism, a locking mechanism, a limiting mechanism and an installation mechanism. The installation mechanism is installed on the door leaf, and the operating mechanism, the locking mechanism and the limiting mechanism are connected to the installation mechanism. The lock pin extends and retracts to the left and right at the same time to achieve the locking and unlocking functions. In the prior art, the locking and unlocking device often uses a mechanical stop mechanism, which has a relatively complex structure and operation, and also lacks a check on the effectiveness of the limit. There is a risk of accidental operation to open the door, and in an emergency, it will also reduce the escape efficiency. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a door leaf lock with a limiting mechanism which is simple in structure, safe and reliable.

[0004] Technical solution: The utility model describes a door leaf lock with a limiting mechanism, which includes an operating mechanism and a locking mechanism. The operating mechanism rotates to drive the locking mechanisms at both ends to extend or retract simultaneously. The operating mechanism includes a driving rod. An electromagnet is provided on one side of the operating mechanism. A stop block is hinged on the electromagnet. A protrusion is provided on the side wall of the driving rod close to the electromagnet. When the door leaf is locked, the electromagnet attracts the stop block, and the front end of the stop block abuts against the protrusion to prevent the locking mechanism from retracting.

[0005] Preferably, an inclined handle is provided on the side of the driving rod away from the stop block, and limit pins for limiting the rotation range of the handle are provided on both sides of the handle.

[0006] Preferably, a hinge block is connected to the electromagnet core shaft, and the hinge block is hinged to the rear end of the stop block. When the electromagnet releases the stop block, the front end of the stop block leaves the protrusion.

[0007] Preferably, the locking mechanism comprises a locking pin, and both ends of the driving rod are hinged through a connecting rod and a rear end of the locking pin.

[0008] Preferably, the door leaf lock also includes a mounting plate for the operating mechanism and the locking mechanism, and pins are respectively provided on the middle part of the side of the mounting plate away from the handle and on the handle, and springs are connected between the pins. When the locking mechanism is extended or retracted at the same time, the springs are located on opposite sides of the driving rod shaft.

[0009] Preferably, the mounting plate is also provided with a travel switch for detecting locking and controlling the electromagnet.

[0010] Preferably, the protrusion is a triangular protrusion, and a side wall of the front end of the stop block close to the protrusion is provided with a chamfered surface for avoiding the top end of the protrusion.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. Simple structure, safe and reliable: the electromagnet limit device can monitor the unlocking action, unlock when allowed, and cannot unlock when not allowed, thereby improving the reliability of the locked state of the door leaf and improving the safety of train operation; 2. The electromagnet limit device is designed to be limited in the energized state, the handle cannot be operated, and the door lock remains locked; the power-off state is free, the handle can be operated, and the door leaf can be unlocked, meeting the safety guidance of the train in an emergency power-off state; 3. Adding a travel switch to detect the action of the electromagnet can, on the one hand, assist in identifying whether the door leaf is locked in place, and on the other hand, can also detect whether the door leaf in the locked state has a limit failure or is accidentally unlocked, further enhancing the reliability of the device; 4. The locking mechanism, limit mechanism, and operating mechanism are integrated using a mounting plate with a modular design for easy disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the operating mechanism structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the locking mechanism structure of the utility model;

[0015] Figure 4 It is a schematic diagram of the limiting state structure of the limiting mechanism of the utility model;

[0016] Figure 5 It is a schematic diagram of the limit release structure of the limit mechanism of the utility model;

[0017] Figure 6 It is a schematic diagram of the installation mechanism structure of the utility model. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0019] like Figure 1 The utility model discloses a locking device, comprising an operating mechanism 1, a locking mechanism 2, a limiting mechanism 3 and a mounting mechanism 4. The mounting mechanism 4 is used to support the operating mechanism 1, the locking mechanism 2 and the limiting mechanism 3.

[0020] like Figure 2The operating mechanism 1 is arranged in the middle of the mounting mechanism 4, and includes a driving rod 6 and a connecting rod 8. The driving rod 6 is rotatably connected to the mounting mechanism 4. The two ends of the driving rod 6 are respectively hinged to the connecting rod 8 through the shaft 21. The connecting rod 8 is connected to the locking mechanism 2. A handle 5 is connected to one side of the driving rod 6. The handle 5 and the driving rod 6 form a certain angle, and the angle between the two is an acute angle. The handle 5 drives the driving rod 6 to rotate, and drives the locking mechanism 2 to approach each other through the connecting rod 8 to unlock, or drives the locking mechanism 2 to move away from each other to lock. A triangular convex block is provided on the side of the driving rod 6 away from the handle 5. When the convex block abuts against the limiting mechanism 3, the driving rod 6 is restricted from rotating to avoid unlocking.

[0021] A pin shaft 10 is provided on the middle of the mounting mechanism 4 away from the handle 5 and on the handle 5, and a spring 9 is provided between the two pin shafts 10. When locked, the spring 9 is located on the left side of the rotation axis of the driving rod 6, and there is a tendency to pull the driving rod 6 to rotate counterclockwise. At this time, the driving rod 6 pushes the connecting rod 8, and the connecting rod 8 pushes the locking mechanism 2, which can be locked stably; when unlocked, the handle is turned, and the spring 9 is first stretched and then restored, and transferred to the right side of the rotation axis of the driving rod 6, and there is a tendency to pull the driving rod 6 to rotate clockwise. At this time, the driving rod 6 pulls the connecting rod 8, and the connecting rod 8 pulls the locking mechanism 2, which can be unlocked stably.

[0022] The mounting mechanisms 4 on both sides of the handle 5 are provided with limit pins 7 , which are used to limit the rotation range of the handle 5 .

[0023] like Figure 3 The locking mechanism 2 includes two left and right locking pins 11 and three left and right fixing seats 12; the fixing seats 12 are connected to the mounting mechanism 4 with countersunk fasteners 13 for guiding the locking pins 11. The rear ends of the left and right locking pins 11 are hinged to the front ends of the connecting rods 8 in the operating mechanism 1 through the shaft 21.

[0024] like Figure 4 , Figure 5 The limit mechanism 3 is mainly composed of an electromagnet 15, a hinge block 14, a stop block 16 and a travel switch 18. The front end of the electromagnet 15 is hinged with the stop block 16 through the hinge block 14. The electromagnet 15 is electrically controlled. When locked, the electromagnet 15 is energized to drive the stop block 16 to rotate to be parallel to the lock pin 11. The front end of the stop block 16 abuts against the protrusion of the drive rod 6, limiting the drive rod 6 from being driven by the handle 5 to rotate and limiting the locking mechanism 2 from retracting. When unlocking, the electromagnet 15 loses power, the stop block 16 falls and tilts, leaving the protrusion, and the drive rod 6 can be driven to rotate by the handle 5. The side wall of the front end of the stop block 16 near the protrusion is provided with a chamfered surface for avoiding the top of the protrusion. When locked, the stop block 16 smoothly rotates to abut against the protrusion.

[0025] The travel switch 18 detects the movement state of the electromagnet 15 to convey whether the device is locked well. In the unlocked state, a signal is given to de-energize the electromagnet 15.

[0026] like Figure 6 The mounting mechanism 4 mainly includes a mounting plate 20, and the mounting plate 20 is connected to the door leaf locking position by a fastener 19.

[0027] During assembly, the mounting plate 20 is mounted on the door leaf through the hexagon socket head fasteners 19, and the fixing seat 12 is installed through the countersunk fasteners 13. The fixing seat is along the width direction of the mounting plate. The handle 5 with the driving rod 6 is installed on the mounting plate 20 through the rotating shaft. The limiting mechanism 3 is on the mounting plate 20, and the stop block 16 is close to the front end notch of the driving rod 6. The locking pin 11 penetrates into the fixing seat and is hinged to the two ends of the front section of the driving rod 6 through the connecting rod 8 and the shaft 21. The pin shaft 10 and the limit pin 7 are installed, and the two ends of the spring 9 are sleeved on the pin shaft 10 to complete the assembly.

Claims

1. A door leaf lock with a limit mechanism, comprising an operating mechanism (1) and a locking mechanism (2), wherein the operating mechanism (1) rotates to drive the locking mechanisms (2) at both ends to extend or retract simultaneously, and wherein: The operating mechanism (1) comprises a driving rod (6), an electromagnet (15) is provided on one side of the operating mechanism (1), a stop block (16) is hingedly connected to the electromagnet (15), and a protrusion is provided on the side wall of the driving rod (6) close to the electromagnet (15). When the door leaf is locked, the electromagnet (15) attracts the stop block (16), and the front end of the stop block abuts against the protrusion, thereby preventing the locking mechanism (2) from retracting.

2. The door leaf lock with a limiting mechanism according to claim 1, characterized in that: An inclined handle (5) is provided on the side of the driving rod (6) away from the stop block (16), and limiting pins (7) for limiting the rotation range of the handle are provided on both sides of the handle (5).

3. The door leaf lock with a limiting mechanism according to claim 1, characterized in that: A hinge block (14) is connected to the core shaft of the electromagnet (15), and the hinge block (14) is hinged to the rear end of the stop block (16). When the electromagnet releases the stop block (16), the front end of the stop block leaves the protrusion.

4. The door leaf lock with a limiting mechanism according to claim 1, characterized in that: The locking mechanism (2) comprises a locking pin (11), and both ends of the driving rod (6) are hingedly connected via a connecting rod (8) and a rear end of the locking pin (11).

5. The door leaf lock with a limiting mechanism according to claim 2, characterized in that: The door leaf lock further comprises a mounting plate (20) for the operating mechanism (1) and the locking mechanism (2), a pin (10) being provided at a middle portion of a side of the mounting plate (20) away from the handle and on the handle (5), a spring (9) being connected between the pins (10), and when the locking mechanism (2) is extended or retracted at the same time, the spring (9) is located on opposite sides of the rotating shaft of the driving rod (6).

6. The door leaf lock with a limiting mechanism according to claim 5, characterized in that: The mounting plate (20) is also provided with a travel switch (18) for detecting locking and controlling the electromagnet (15).

7. The door leaf lock with a limiting mechanism according to claim 1, characterized in that: The protrusion is a triangular protrusion, and the front end of the stop block (16) is provided with a chamfered surface close to the side wall of the protrusion for avoiding the top end of the protrusion.

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