A two-way push-pull lever door lock with safety and control method

Abstract

The application discloses a two-way push-pull rod door lock with safety and a control method, and belongs to the field of railway vehicle door systems. The two-way push-pull rod door lock comprises a fixed lock stop, a main door lock shell, a supporting reset device and a push-pull rod. The lock stop is provided with a locking area. Two first inclined surfaces are oppositely arranged on the lock stop, and the locking area is arranged between the connecting lines of the two first inclined surfaces. A lock tongue is elastically mounted in the main door lock shell through a spring. The supporting reset device is provided with a rotatable reset shaft two through a constraint member. One end of the push-pull rod is fixedly connected with the shaft two, and the other end is rotatably connected with an inclined pushing piece in the main door lock shell through a shaft one. The push-pull rod realizes the movement of the inclined pushing piece and the two-way extrusion unlocking structure formed by the lock tongue through pull and push movements. In use, the push and position actions of the push-pull rod can both unlock in an emergency. The push-pull rod drives the double inclined surfaces to push the lock tongue to realize unlocking.

Description

Technical Field

[0001] This application relates to the field of rail vehicle door system technology, specifically to a door lock with a safety two-way push-pull rod and its control method. Background Technology

[0002] The hinged door systems commonly used in rail vehicles typically have door locks that open in one direction, meaning the door leaf rotates to one side of the door panel via a hinge axis. Some hinged door systems are also bidirectional, allowing opening to both sides of the door panel.

[0003] For hinged doors that open in both directions: the driver's side often uses a handle, which is slow to respond in an emergency; some use a push rod structure, but it is often a one-way push, making the operation direction of the hinged door relatively simple and difficult to open quickly when it gets stuck. The existing door lock structure is not suitable for opening doors in emergency situations, which is a problem that technicians need to solve. Summary of the Invention

[0004] The purpose of this application is to provide a door lock with a safety double-acting push-pull lever and a control method to solve the above-mentioned defects caused by the prior art.

[0005] To achieve the above objectives, this application employs the following technical solution: Firstly, this application discloses a door lock with a safety double-acting push-pull rod, which includes... A fixed locking stop is provided, the locking stop having a locking area, and two first inclined surfaces opposite each other on the locking stop, the locking area being located between the lines connecting the two first inclined surfaces; The main door lock housing contains a lock tongue that is elastically installed inside by a spring. A support and reset device, wherein the support and reset device is equipped with a rotatable and resettable shaft two by means of a constraint member; A push-pull rod, one end of which is fixedly connected to the second shaft, and the other end is rotatably connected to the inclined push member inside the main door lock housing via the first shaft. The push-pull rod moves in a pulling or pushing motion, thereby moving the inclined push member and forming a bidirectional pressing unlocking structure with the lock tongue. The main door lock housing and the support reset device are fixed on the hinged mounting body. The mounting body swings around the hinge. The lock tongue moves and contacts the two first inclined surfaces to realize the compression and release of the spring.

[0006] In a further embodiment of this application, the support and reset device includes a fixedly mounted reset shell, a shaft rotatably mounted on the reset shell, and a turntable. The turntable is fixedly connected to the second shaft, and the turntable is fixed with pins on the top and bottom. A torsion spring is sleeved on the second shaft, and the two pins of the torsion spring are in contact with the corresponding limit post on the reset shell.

[0007] In a further embodiment of this application, a guide sleeve is provided on the side of the main door lock housing facing the lock stop, and a limiting protrusion is provided on the lock tongue, and the lock tongue moves along the cavity direction of the guide sleeve.

[0008] In a further embodiment, the latch is provided with a hollow movable area, and a guide block is fixed inside the main door lock housing. The guide block and the hollow movable area are movably assembled.

[0009] In a further embodiment of this application, the inclined pusher has symmetrical second inclined surfaces, and the locking tongue is provided with force-bearing areas that match the two second inclined surfaces. The push-pull rod moves in a pulling and pushing motion to realize that either of the second inclined surfaces squeezes the force-bearing areas, thereby completing the locking tongue disengaging from the locking area.

[0010] A further embodiment of this application also includes a handle, which is rotatably mounted on the main door lock housing via a shaft three. A cam is fixed on the shaft three, and the cam movably presses against the latch, wherein the movable surface of the latch and the rotating surface of the cam are the same.

[0011] In a further embodiment, a lock cylinder is rotatably mounted on one side of the main door lock housing via a shaft four, and a knob is fixedly connected to the shaft four on the other side of the main door lock housing. A stop block for limiting the cam is fixed on the shaft four. A further proposed solution is to have the handle and the lock cylinder positioned on the same side.

[0012] In a further embodiment of this application, the push-pull rod is U-shaped, and the short rod side of the push-pull rod is connected to shaft two and shaft one respectively.

[0013] Secondly, this application discloses a control method for a door lock with a safety two-way push-pull rod, which includes... When locked, the mounting body swings around the hinge, the latch is pressed as it passes any of the first inclined surfaces, and the spring is compressed until the latch passes the locking area. The spring is then released elastically, extending the latch into the locking area, thus fixing the mounting body. During unlocking, the push-pull rod is pushed and pulled, causing the inclined pusher to press the unlocking tongue in both forward and reverse directions, thus completing the unlocking process; at the same time, the shaft rotates, and the constraint member is subjected to force and stores energy; when the external force is removed, the constraint member releases energy, causing the push-pull rod to reset, thus completing the reset of the lock tongue, and waiting to be locked again.

[0014] The beneficial effects of this application are as follows: This door lock optimizes its functions and improves its performance. The push-position lever allows for unlocking in emergencies by pushing or pulling. The push-pull lever unlocks by pushing the bolt through a drive angled pusher. That is, each push and pull unlocking uses an angled surface. After pushing or pulling unlocking, the push-pull lever returns to its initial position via a resettable shaft. This makes it easy to operate and allows for emergency unlocking in case of triggering. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the two-way push-pull rod door lock in the embodiment of this application; Figure 2 This is a schematic diagram of the locking tongue guide structure in an embodiment of this application; Figure 3 This is a schematic diagram of the locking mechanism of the latch and locking stop in an embodiment of this application. Figure 4 This is a schematic diagram of the installation structure of the push-pull rod and the locking tongue in the embodiments of this application; Figure 5 This is a schematic diagram of the internal structure of the support reset device in the embodiments of this application; Figure 6 This is a schematic diagram of the handle unlocking and locking mechanism in an embodiment of this application.

[0016] in: 1. Main door lock housing; 2. Lock stop; 3. Push-pull rod; 4. Support and reset device; 5. Door lock panel; 6. First inclined surface; 7. Second inclined surface; 8. Lock tongue; 9. Handle; 10. Lock cylinder; 11. Cam; 12. Stop block; 13. Guide sleeve; 14. Guide block; 15. Shaft 1; 16. Angled push component; 17. Shaft 2; 18. Turntable; 19. Pin; 20. Torsion spring; 21. Shaft 3; 22. Shaft 4; 23. Knob; 41. Limiting post; 81. Rotary wheel. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. Example 1

[0018] like Figures 1 to 3 and Figure 5As shown, this embodiment discloses a door lock with a safety double-acting push-pull rod 3, which includes a fixed lock stop 2, a main door lock shell 1, a support and reset device 4, and a push-pull rod 3. The lock stop 2 has a locking area (lock groove) and two first inclined surfaces 6 opposite each other on the lock stop 2. The locking area is located between the lines connecting the two first inclined surfaces 6. A lock tongue 8 is elastically installed in the main door lock shell 1 by a spring. The support and reset device 4 is equipped with a rotatable reset shaft 17 by a constraint member. One end of the push-pull rod 3 is fixedly connected to the shaft 17, and the other end is rotatably connected to the inclined push member 16 in the main door lock shell 1 by a shaft 15. The push-pull rod 3 moves by pulling and pushing, so that the inclined push member 16 moves and forms a double-acting compression unlocking structure with the lock tongue 8. The main door lock shell 1 and the support and reset device 4 are fixed on a hinged mounting body. The mounting body swings around the hinge. The lock tongue 8 moves and contacts the two first inclined surfaces 6, so as to realize the compression and release of the spring.

[0019] During installation, the lock stop 2 is fixed to the vehicle body, the main door lock housing 1 and the support reset device 4 are fixed to the door body, and both are fixed on the same side of the door body. The door body is hinged to the vehicle body. When the door body is opened or closed, the main door lock housing 1, which moves in an arc, sweeps over the position of the lock stop 2, and the lock tongue 8 and the lock groove are at the same installation height.

[0020] When in use, when opening the door, the operator pushes or pulls the push rod 3, causing the inclined pusher 16 to rotate in both directions, decompressing and forcing the latch 8 to move outward, so that the latch 8 leaves the locking area and the door can be opened normally. When the operator releases the push rod 3, it is reset under the drive of the resettable shaft 17. When closing the door, the operator closes the door body, and the latch 8 contacts and presses any one of the first inclined surfaces 6, causing the latch 8 to compress the spring until it enters the locking zone. At this time, driven by the spring, it enters the locking zone, completing the door closing and locking.

[0021] The push-pull lever 3 can be used to unlock in both directions, which is convenient and quick, enabling rapid unlocking in emergency situations.

[0022] As attached Figure 5 As shown, in this embodiment, the supporting reset device 4 includes a fixed reset shell, a shaft 17 rotatably mounted on the reset shell, and a turntable 18. The reset shell is fixed to the door body. The shaft 17 is fixedly connected to the middle of the turntable 18. Pins 19 are fixed on the upper and lower sides of the turntable 18. The two pins 19 are arranged in parallel and located on both sides of the shaft 17. A torsion spring 20 is sleeved on the shaft 17. The two pins of the torsion spring 20 are in contact with the corresponding limiting post 41 on the reset shell. In the initial state, the turntable 18 is arranged vertically. When the push-pull rod 3 pushes and pulls, one of the pins 19 drives the adjacent pin to move. The pin of the torsion spring 20 on the other side is restricted from moving by the limiting post 41. The torsion spring 20 undergoes elastic deformation. When the external force is removed from the push-pull rod 3, the reset action is performed under the action of the torsion spring 20.

[0023] As attached Figure 2 As shown, in this embodiment, the main door lock housing 1 is provided with a guide sleeve 13 on the side facing the lock stop 2, and the lock tongue 8 is provided with a limiting protrusion, and the lock tongue 8 can move along the length direction of the cavity of the guide sleeve 13. In a further embodiment, considering that the latch 8 has a certain length, in order to ensure the stability of the movement path of the latch 8, a rectangular hollow movable area is assumed on the latch 8, and a guide block 14 is fixedly installed inside the main door lock housing 1. The guide block 14 and the hollow movable area are movable and assembled.

[0024] As attached Figure 4 As shown, in this embodiment, the inclined push member 16 has symmetrical second inclined surfaces 7, and the locking tongue 8 is provided with force-bearing areas that match the two second inclined surfaces 7. When the push-pull rod 3 is pulled or pushed by an external force, any second inclined surface 7 is squeezed against its adjacent force-bearing area, thus completing the locking tongue 8 being squeezed out of the locking area. In some embodiments, the contact end of the inclined push member 16 is designed as a triangle, and all three sides are smooth curved surfaces. The force-bearing area of ​​the locking tongue 8 is a mounting groove, which is vertically rotated and mounted on the rotating wheel 81 on the opposite side wall of the mounting groove. Through the inclined curved surface and the rotating wheel 81 squeezing contact, the locking tongue 8 is forced to move in the guide sleeve 13 to complete the unlocking action.

[0025] As attached Figure 1 and Figure 6 As shown, in this embodiment, a handle 9 and a stop 12 for intermittently limiting the rotation of the handle 9 are added; the handle 9 is rotatably mounted on the main door lock housing 1 via shaft 3 21. In actual installation, the door lock panel 5 is fixed on the main door lock housing 1, and shaft 3 21 is also rotatably connected to the door lock panel 5. A cam 11 is fixed on shaft 3 21. When the handle 9 is rotated by external force, the cam 11 moves to press the latch 8, and the latch 8 moves along the arrangement direction of the guide sleeve 13 to complete the unlocking. The moving surface of the latch 8 is the same as the rotating surface of the cam 11.

[0026] On one side of the main door lock housing 1, a lock cylinder 10 is rotatably mounted via shaft 22. The lock cylinder 10 is usually mounted on the same side as the handle 9. On the other side of the main door lock housing 1, there is a knob 23 that is fixedly connected to shaft 22. A stop block 12 that limits the cam 11 is fixed on shaft 22. The stop block 12 has a protrusion, and the cam 11 has a slot. Rotating the stop block 12 causes the protrusion to be placed in the slot to limit the cam 11.

[0027] In actual installation, the handle 9 and lock cylinder 10 are installed on the door body on the passenger side, and the push-pull rod 3 and knob 23 are installed on the door body on the driver's side. The lock cylinder 10 or knob 23 authorizes or deauthorizes the door lock handle 9 by rotating it. After the handle 9 is authorized by the lock cylinder 10 or knob 23, the handle 9 rotates the cam 11 to push the bolt 8 back to unlock it.

[0028] One of the key technologies of this invention is that the door lock stop 2 adopts a double bevel, and the latch 8 can be retracted after being struck from both sides of the hinged door and enters the lock stop 2 to lock.

[0029] A push-pull rod 3 is installed on one side of the door lock; the push-pull rod 3 unlocks the door by driving the double bevels to push the bolt 8; the push-unlock and pull-unlock operations are respectively carried out by the bevels in the corresponding positions.

[0030] The push-pull rod 3 supports the reset structure 4, keeping the push-pull rod 3 in the center position; after pushing to unlock or pulling to unlock, the reset structure uses a spring to reset the push-pull rod 3 to the center position.

[0031] A handle 9 is provided on the other side of the door lock. The handle 9 is unlocked by pushing the bolt 8 through the drive cam 11.

[0032] The door lock is equipped with a lock cylinder 10 or a knob 23, with an internally linked locking structure. The locking structure locks or unlocks the handle 9 by means of a limit block, and authorizes operation through the lock cylinder 10 or the knob 23. However, the push-pull rod 3 can be operated without authorization from the locking structure, which meets the needs of emergency situations.

[0033] In this embodiment, the push-pull rod 3 is in the shape of a door. The short rod side of the push-pull rod 3 is connected to shaft 2 17 and shaft 1 15 respectively. By using a "lever", it is easy for the operator to apply force and at the same time achieve the purpose of saving effort. Example 2

[0034] Based on the same inventive concept, this embodiment discloses a control method for a three-door lock with a safety bidirectional push-pull rod, which includes... When locked, the door swings around the hinge (when closing), the latch 8 is pressed as it passes any of the first inclined surfaces 6, and the spring is compressed until the latch 8 passes the locking area. The spring is then released elastically, and the latch 8 extends into the locking area, thus completing the door fixing. During unlocking, the push-pull action of the push-pull rod 3 causes the second inclined surface 7 corresponding to the forward and reverse rotation of the inclined push member 16 to rotate and press the rotating wheel 81 on the locking tongue 8, causing the locking tongue 8 to move away from the locking area and complete the unlocking; at the same time, the shaft 17 rotates, and the constraint member is subjected to force and stores energy; when the external force is removed, the energy of the constraint member is released, causing the push-pull rod 3 to reset, completing the reset of the locking tongue 8, and waiting to be locked again; The lock cylinder 10 is rotated by key operation, or the stop block 12 is rotated by manually turning the knob 23 to limit the cam 11. At this time, the handle 9 is locked (unauthorized) and cannot be unlocked. When the lock cylinder 10 is engaged or the knob 23 is released (authorized), the handle 9 can be used normally; however, the above restrictions cannot limit the unlocking action of the push-pull rod 3. The unlocking structure of the push-pull rod 3 is designed to enable quick door opening and is suitable for emergency door opening.

[0035] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

Claims

1. A door lock with a safety double-acting push-pull rod, characterized in that, include A fixed locking stop is provided, the locking stop having a locking area, and two first inclined surfaces opposite each other on the locking stop, the locking area being located between the lines connecting the two first inclined surfaces; The main door lock housing contains a lock tongue that is elastically installed inside by a spring. A support and reset device, wherein the support and reset device is equipped with a rotatable and resettable shaft two by means of a constraint member; A push-pull rod, one end of which is fixedly connected to the second shaft, and the other end is rotatably connected to the inclined push member inside the main door lock housing via the first shaft. The push-pull rod moves in a pulling or pushing motion, thereby moving the inclined push member and forming a bidirectional pressing unlocking structure with the lock tongue. The main door lock housing and the support reset device are fixed on the hinged mounting body. The mounting body swings around the hinge. The lock tongue moves and contacts the two first inclined surfaces to realize the compression and release of the spring.

2. The door lock with safety double-sided push-pull rod according to claim 1, characterized in that, The support and reset device includes a fixedly installed reset shell, a shaft rotatably installed on the reset shell, and a turntable. The turntable is fixedly connected to the second shaft, and the turntable is fixed with pins on the top and bottom. A torsion spring is sleeved on the second shaft, and the two pins of the torsion spring are in contact with the corresponding limit post on the reset shell.

3. The door lock with safety double-sided push-pull rod according to claim 1, characterized in that, The main door lock housing has a guide sleeve on the side facing the lock stop, and a limiting protrusion on the lock tongue. The lock tongue moves along the cavity direction of the guide sleeve.

4. The door lock with safety double-sided push-pull rod according to claim 3, characterized in that, The latch is provided with a hollow movable area, and a guide block is fixed inside the main door lock housing. The guide block and the hollow movable area are movably assembled.

5. The door lock with safety double-sided push-pull rod according to claim 1, characterized in that, The inclined pusher has symmetrical second inclined surfaces, and the locking tongue has force-bearing areas that match the two second inclined surfaces. The push-pull rod pulls and pushes, so that either of the second inclined surfaces squeezes the force-bearing area, thus completing the locking tongue disengaging from the locking area.

6. The door lock with safety double-sided push-pull rod according to claim 1, characterized in that, It also includes a handle, which is rotatably mounted on the main door lock housing via a shaft three. A cam is fixed on the shaft three, and the cam moves to press the bolt, wherein the moving surface of the bolt and the rotating surface of the cam are the same.

7. The door lock with safety double-sided push-pull rod according to claim 6, characterized in that, A lock cylinder is rotatably mounted on one side of the main door lock housing via shaft four, and a knob is fixedly connected to shaft four on the other side of the main door lock housing. A stop block for limiting the cam is fixed on shaft four.

8. The door lock with safety double-sided push-pull rod according to claim 7, characterized in that, The handle and the lock cylinder are located on the same side.

9. The door lock with safety double-sided push-pull rod according to claim 1, characterized in that, The push-pull rod is in the shape of a door, and the short rod side of the push-pull rod is connected to shaft two and shaft one.

10. A control method for a door lock with a safety double-acting push-pull rod according to any one of claims 1 to 9, characterized in that, include When locked, the mounting body swings around the hinge, the latch is pressed as it passes any of the first inclined surfaces, and the spring is compressed until the latch passes the locking area. The spring is then released elastically, extending the latch into the locking area, thus fixing the mounting body. During unlocking, the push-pull rod is pushed and pulled, causing the inclined pusher to press the unlocking tongue in both forward and reverse directions, thus completing the unlocking process; at the same time, the shaft rotates, and the constraint member is subjected to force and stores energy; when the external force is removed, the constraint member releases energy, causing the push-pull rod to reset, thus completing the reset of the lock tongue, and waiting to be locked again.

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