A kind of engineering vehicle door opening locking structure

Abstract

This utility model relates to the field of external door locking technology, specifically to a door opening and locking structure for engineering vehicles. It includes a driver's cab with a door hinged to it. A drive plate is mounted above the driver's cab and hinged to the door. A lock lug is connected to the end of the drive plate furthest from the door. A latch is also provided on the upper surface of the driver's cab, engaging with the lock lug for locking. The latch is fixedly mounted on one side of the drive plate. The lock lug is connected to the door via the drive plate. When the door is opened, the drive plate pulls the lock lug towards the latch, completing the locking action and ensuring locking while the door is open. This prevents accidental slamming of the door and injuries to personnel, improving safety. The drive plate has an arc-shaped groove with a limiting member inside. This limiting member is connected to the driver's cab. When the limiting member abuts against the side of the arc-shaped groove furthest from the door, the latch locks the lock lug, reducing the impact force of the lock lug on the internal components of the latch after locking and extending the service life of the latch.

Description

Technical Field

[0001] This utility model relates to the field of external door locking technology, specifically to a door opening and locking structure for engineering vehicles. Background Technology

[0002] When engineering vehicles need to be put on and taken off for maintenance, if the doors are not secured, they may swing or even close suddenly under the influence of machine operation, vibration or wind, which may easily injure nearby workers. Therefore, the doors should be properly secured to prevent accidental closing or movement.

[0003] A search of utility model patent application number CN201721592777.7—a bulldozer external collision lock structure that can be opened from the inside—also effectively solves the above problems. It includes a lock hook installed on the outside of the cab door, a lock body fixing seat installed on the cab body, a lock body seat, a lock tongue, a rigid handle, and a spring. The lock body seat is mounted on the lock body fixing seat, and a lock tongue is located at the front end of the lock body seat. The lock tongue includes a locking head, a straight section, and a curved section. The head of the straight section connects to the locking head, and the tail of the straight section connects to the curved section. One end of the rigid handle passes sequentially through the cab, the lock body fixing seat, the lock body seat, and connects to the curved section. The other end of the rigid handle is located inside the cab door. One end of the spring is fixed to the curved section, and the other end of the spring is fixed to the lower front end of the lock body seat. The beneficial effects of this utility model are: the external collision lock can be opened while the driver is seated, improving the convenience of operation for the bulldozer operator, while reducing the danger caused by getting up to unlock. It meets the functional requirements of the driver to open the external collision lock from the inside, is easy to operate, and has good results.

[0004] This application proposes the following technical solution to address the technical problem of properly securing vehicle doors when they are opened. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a door opening and locking structure for engineering vehicles. The technical problem it solves is that when engineering vehicles are parked for maintenance and require passengers to get on and off, if the doors are not secured, they may swing on their own or even close suddenly due to machine operation, vibration, or wind, easily injuring nearby workers. The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A door opening and locking structure for an engineering vehicle, characterized in that it includes: The cab has a door that is hinged. The drive plate is located above the cab and is hinged to the door. The lock nose is located at the end of the drive plate away from the door. The latch lock engages with the lock nose and is fixedly mounted on the upper surface of the cab on one side of the drive plate. The arc-shaped groove is located on the drive plate, and the center of the arc-shaped groove coincides with the hinge point of the door. The limiting component is located in the arc-shaped groove and connected to the cab. When the limiting component abuts against the side of the arc-shaped groove away from the door, the latch locks the lock nose.

[0006] Furthermore, the door is fixedly equipped with a connecting bracket, which is connected to the drive plate by a hinge.

[0007] Furthermore, an inverted U-shaped bracket is fixedly installed on the upper surface of the cab, which is mounted above the drive plate and fixedly connected to the bumper lock.

[0008] Furthermore, a protective cover is provided on the outside of the drive plate, and the protective cover is fixedly connected to the upper surface of the cab. An opening is provided on one side of the protective cover for the drive plate to pass through.

[0009] Furthermore, the limiting component is a bolt-type cam roller bearing.

[0010] Furthermore, the drive plate at the lower part of the lock nose is equipped with a omnidirectional ball.

[0011] Furthermore, the bump lock is a trigger-type bump lock, model XG05-050.

[0012] Furthermore, a support frame is fixedly installed on one side of the driver's cab of the trigger-type collision lock, and the support frame has through holes that are flush with the switch of the trigger-type collision lock. The trigger-type collision lock has a pull cord connected to its switch, with the other end of the cord extending downwards through a perforation.

[0013] The beneficial effects of this utility model are as follows: By placing the lock nose and the latch on the top of the cab, the impact on the overall layout of the cab is reduced, leaving sufficient space for the cab design. The lock nose is connected to the door via a drive plate. When the door is opened, the drive plate pulls the lock nose towards the latch, finally completing the locking action, ensuring the door remains locked when open, preventing accidental closure of the door and thus avoiding injuries to personnel, thereby improving safety.

[0014] When the opening reaches the end of the arc-shaped groove, the limiting component cooperates with the arc-shaped groove to limit the movement, reducing the impact force of the lock nose on the internal components of the bumper lock after locking, improving the service life of the bumper lock, and ensuring that the drive plate rotates around the hinge point between the cab and the door.

[0015] By setting up a support frame to adjust the direction of the pull rope, it is convenient to use the pull rope to pull the operating handle of the lock to unlock it, eliminating the need for the operator to get up and go outside the cab to unlock it, thus improving the convenience of unlocking. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is an enlarged structural diagram of the latch, drive plate, and lock nose of this utility model; In the picture: 1. Cab, 2. Door, 3. Drive plate, 4. Lock nose, 5. Hatch lock, 6. Arc groove, 7. Limiting component, 8. Connecting frame, 9. Inverted U-shaped bracket, 10. Protective cover, 11. Universal ball, 12. Support frame. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the utility model will now be described in further detail with reference to the accompanying drawings and the following embodiments, so that the public can better understand the implementation method of this utility model. The specific implementation scheme of this utility model is as follows: A door opening and locking structure for an engineering vehicle includes a cab 1, with a door 2 hinged to the cab 1. A drive plate 3 is mounted above the cab 1 and is hinged to the door 2. A lock lug 4 is connected to the end of the drive plate 3 away from the door 2. A latch 5, which engages with the lock lug 4, is also mounted on the upper surface of the cab 1. The latch 5 is fixedly mounted on one side of the drive plate 3. By placing the lock lug 4 and the latch 5 on the top of the cab, the impact on the overall layout of the cab 1 is reduced, and sufficient space is reserved for the design of the cab 1. The lock lug 4 is connected to the door 2 through the drive plate 3. When the door 2 is opened, the drive plate 3 pulls the lock lug 4 toward the latch 5, and finally completes the locking action, ensuring the door is locked when open, preventing accidental closure of the door and thus avoiding injury to personnel, thereby improving safety. The drive plate 3 has an arc-shaped groove 6, and a limiting member 7 is installed in the arc-shaped groove 6. The limiting member 7 is connected to the cab 1, and the center of the arc-shaped groove 6 coincides with the hinge point of the door 2 to ensure that the door can be opened normally. When the limiting member 7 abuts against the side of the arc-shaped groove 6 away from the door 2, the bumper lock 5 locks the lock nose 4, reducing the impact force of the lock nose on the internal components of the bumper lock after locking, and improving the service life of the bumper lock.

[0018] It should be noted that the door 2 is fixedly equipped with a connecting bracket 8, which is connected to the drive plate 3 by a hinge.

[0019] It should be noted that, in order to ensure that the lock nose 4 and the bumper lock 5 can be locked, an inverted U-shaped bracket 9 is fixedly installed on the upper surface of the cab 1. The inverted U-shaped bracket 9 is mounted above the drive plate 3 and is fixedly connected to the bumper lock 5 to ensure the stability of the bumper lock 5.

[0020] In order to protect the lock nose 4, drive plate 3 and bump lock 5, a protective cover 10 is provided on the upper part of the cab 1. The protective cover 10 is fixedly connected to the upper end face of the cab 1, and an opening is provided on one side of the protective cover 10 for the drive plate 3 to pass through.

[0021] Specifically, the limiting component 7 is a bolt-type cam roller bearing to ensure the docking of the lock lug 4 and the latch 5.

[0022] Furthermore, the drive plate 3 at the lower part of the lock nose 4 is provided with a universal ball 11 to prevent the drive plate 3 from drooping.

[0023] Specifically, the 5-type bump lock is a trigger-type bump lock, model XG05-050, manufactured by Guangdong Haitan Electric Cabinet Lock Co., Ltd.

[0024] Based on the above embodiments, in this embodiment, a support frame 12 is fixedly installed on the driver's cab 1 on one side of the trigger-type collision lock. The support frame 12 has a through hole, which is flush with the switch of the trigger-type collision lock. The switch of the trigger-type collision lock is connected to a pull rope, and the other end of the pull rope passes through the through hole and extends downward, so that personnel can unlock the connection between the collision lock 5 and the lock nose 4 in the driver's cab 1.

[0025] The working principle and process of this utility model are as follows: When the door 2 is opened, the drive plate 3 is moved outward by the connecting bracket 8. The drive plate 3 is blocked by the bolt-type cam roller bearing 7, causing the drive plate 3 to rotate around the hinge point with the connecting bracket 8 until the lock nose 4 locks with the bump lock 5. After locking, the side wall of the arc groove 6 abuts against the bolt-type cam roller bearing 7, and the lock nose 4 cannot further impact the internal components of the bump lock 5.

[0026] When unlocking is required, the driver sits in the cab and pulls the cable. The vertical cable passes through the steering of the support frame 12 and pulls the operating handle of the lock 5 to unlock it.

[0027] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "front," "rear," "lower left," "upper right," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 the scope of protection of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Although this utility model has been described according to a limited number of embodiments, those skilled in the art should understand from the above description that other embodiments can be conceived within the scope of this utility model described herein.

Claims

1. A door opening and locking structure for an engineering vehicle, characterized in that, include: The cab (1) is equipped with a door (2) by means of hinges; Drive plate (3), drive plate (3) is located above the cab (1) and is hinged to the door (2); Lock nose (4), lock nose (4) is connected to one end of drive plate (3) located away from door (2); A latch (5) is engaged with the latch (4) for locking. The latch (5) is fixedly installed on the upper surface of the cab (1) on one side of the drive plate (3). The arc-shaped groove (6) is opened on the drive plate (3), and the center of the arc-shaped groove (6) coincides with the hinge point of the door (2); The limiting member (7) is set in the arc groove (6) and connected to the cab (1). When the limiting member (7) abuts against the side of the arc groove (6) away from the door (2), the latch (5) locks the lock nose (4).

2. The door opening and locking structure for an engineering vehicle according to claim 1, characterized in that: The door (2) is fixedly equipped with a connecting frame (8), which is connected to the drive plate (3) by a hinge.

3. The door opening and locking structure for an engineering vehicle according to claim 1, characterized in that: An inverted U-shaped bracket (9) is fixedly installed on the upper surface of the cab (1). The inverted U-shaped bracket (9) is mounted above the drive plate (3) and is fixedly connected to the bump lock (5).

4. The door opening and locking structure for an engineering vehicle according to claim 1, characterized in that: The drive plate (3) is provided with a protective cover (10), which is fixedly connected to the upper surface of the cab (1). An opening is provided on one side of the protective cover (10) for the drive plate (3) to pass through.

5. The door opening and locking structure for an engineering vehicle according to claim 1, characterized in that: The limiting component (7) is a bolt-type cam roller bearing.

6. The door opening and locking structure for an engineering vehicle according to claim 1, characterized in that: The drive plate (3) at the lower part of the lock nose (4) is equipped with a universal ball (11).

7. The door opening and locking structure for an engineering vehicle according to claim 1, characterized in that: The bump lock (5) is a trigger-type bump lock, model XG05-050.

8. The door opening and locking structure for an engineering vehicle according to claim 7, characterized in that: A support frame (12) is fixedly installed on the driver's cab (1) on one side of the trigger-type collision lock. The support frame (12) has a through hole, which is flush with the switch of the trigger-type collision lock. The trigger-type collision lock has a pull cord connected to its switch, with the other end of the cord extending downwards through a perforation.

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