A vehicle door automatic locking device

Abstract

The utility model provides a kind of vehicle door body automatic locking device, comprising: first locking part, be equipped on the car body and be equipped with first clamping portion;Second locking part, rotation is equipped on the door body, the first locking part includes locking end, the second clamping portion of rotating corresponding the first clamping portion is equipped on the locking end;Driving mechanism, including first driving part and second driving part, the first driving part is used to drive the door body closure or open, the first driving part and second driving part are used to drive the second locking part rotation.The effect that the first clamping portion prevents the second clamping portion from moving towards the door body opening direction, even in the case of certain looseness of first driving part and pressure change of car body in the stage of pollution, by the clamping effect of first clamping portion and second clamping portion, still can prevent the door body looseness and the gap between car body occurs, to avoid sewage leakage in car body, greatly improve the stability of door body locking.

Description

Technical Field

[0001] This utility model relates to the field of automatic locking devices, specifically an automatic locking device for vehicle doors. Background Technology

[0002] Currently, the opening and closing of the rear doors of sanitation vehicles such as vacuum trucks and garbage trucks are all achieved using hydraulic cylinders. The rear door and the truck body are sealed with sealing strips, and the tension between the rear door and the truck body is achieved by the hydraulic cylinder in conjunction with the latch mechanism.

[0003] However, although this rear door locking method can ensure the sealing between the rear door and the truck body during the negative pressure stage of sewage suction, during the reverse sewage discharge stage, due to the internal leakage of the oil cylinder and its valve assembly, the positive pressure generated inside the truck body will cause leakage gaps between the rear door and the truck body, resulting in sewage leakage inside the truck body. This is especially true for sewage suction trucks, where the risk of leakage during the sewage discharge stage is extremely high.

[0004] Therefore, the research objective of this utility model is to design an automatic locking device for vehicle doors that can fully lock the rear door, addressing the problems existing in the prior art. Utility Model Content

[0005] In view of the problems existing in the prior art, the present invention provides an automatic locking device for vehicle doors, which can effectively solve the problems existing in the prior art.

[0006] The technical solution of this utility model is: An automatic door locking device for a vehicle, the vehicle including a carriage with doors, the automatic locking device comprising: The first locking element is provided on the carriage and has a first latching part; The second locking member is rotatably mounted on the door body. The first locking member includes a locking end, and the locking end is provided with a second locking part that rotatably corresponds to the first locking part. The driving mechanism includes a first driving member and a second driving member. The first driving member is used to drive the door to close or open. Both the first and second driving members are used to drive the second locking member to rotate. When the first driving member drives the door to close, the second driving member drives the second locking member to rotate until the second engaging part engages with the first engaging part. When the first driving member drives the door to open, it drives the second locking member to rotate until the first engaging part disengages from the second engaging part. After the second engaging part engages with the first engaging part, the first engaging part is used to prevent the second engaging part from moving in the direction of the door opening.

[0007] Furthermore, the door body is rotatably connected to the carriage. The first driving member is a driving cylinder, the second driving member is an elastic member, and the second locking member also includes a driven end corresponding to the extension end of the driving cylinder. One end of the driving cylinder is rotatably connected to the side of the carriage and the other end is movably connected to the side of the door body. One end of the elastic member is rotatably connected to the side of the door body and the other end is rotatably connected to the locking end. The elastic member is used to drive the locking end to rotate to the second locking part to engage with the first locking part. When the extension end of the driving cylinder extends and drives the door body to rotate and open, it pushes the driven end to drive the second locking member to rotate and disengage from the first locking member. When the extension end of the driving cylinder retracts and drives the door body to rotate and close, it disengages from the driven end, and the second locking member is driven by the elastic member to reset and rotate to the second locking part to engage with the first locking part.

[0008] Furthermore, the first locking member, the second locking member, and the drive cylinder are distributed sequentially from top to bottom. The first locking member is arranged horizontally and has a first latching part extending to the side of the door body at its bottom. The upper part of the locking end is provided with a second latching part. After the door body is closed, the second locking member is driven by the elastic member to reset and rotate until the locking end is arranged horizontally and the second latching part latches the first latching part. The driven end is arranged vertically, and the horizontal gap of the extension end of the drive cylinder corresponds to the side of the driven end closer to the carriage.

[0009] Furthermore, a roller is rotatably provided at the lower end of the driven end, and the extension end of the drive cylinder is rounded and pushes the driven end by rolling through the roller.

[0010] Furthermore, the first latching part is configured as a plurality of first latching teeth arranged horizontally and inclined toward the closing direction of the door, and the second latching part is configured as a plurality of second latching teeth corresponding to the plurality of first latching teeth and inclined toward the opening direction of the door.

[0011] Furthermore, the upper end of the door is rotatably connected to the upper rear side of the carriage, and a limiting post is provided on the side of the door. The telescopic end of the drive cylinder is provided with a guide hole that extends forward and backward and is movably sleeved on the outside of the limiting post.

[0012] Therefore, the beneficial effects of this utility model are: 1. By adding a first locking member and a second locking member, and setting a drive mechanism including a first driving member and a second driving member for dual drive, the second locking member can automatically rotate to engage with the first locking member of the first locking member through the second locking member when the door is closed, thereby automatically locking the door. Under the action of the first locking member preventing the second locking member from moving in the direction of door opening, even during the sewage discharge stage, when the first driving member is somewhat loose and the pressure inside the carriage increases, the locking action of the first locking member and the second locking member can still prevent the door from loosening and creating a gap between it and the carriage, thus avoiding sewage leakage from the carriage and greatly improving the stability of door locking.

[0013] 2. By configuring the drive cylinder and the elastic element, when the extension end of the drive cylinder extends and drives the door to rotate and open, it pushes the driven end to rotate and disengage the second locking element from the first locking element. Specifically, the driven end is pushed backward, and the locking end disengages from the first locking element. This allows the unlocking of the second locking element to occur as the door opens, avoiding situations where slow unlocking prevents the door from opening or where the first and second locking elements are damaged due to excessive force. This improves the efficiency and stability of the automatic unlocking of the automatic locking device. When the extension end of the drive cylinder retracts and drives the door to rotate and close, it disengages from the driven end. The second locking element is driven by the elastic element to reset and rotate until the second locking part engages with the first locking part. This ensures that after the door closes, the second locking element quickly rotates into position and locks due to the elastic force of the elastic element. This avoids situations where the door cannot close or the first and second locking elements are damaged due to excessive force, thus improving the efficiency and stability of the automatic locking device. In summary, by linking the extension and retraction end of the drive cylinder and the driven end of the second locking component, the unlocking and locking of the automatic locking device can be achieved automatically and stably with the opening and closing of the door, without the need to add electrical components such as sensors, thus reducing control costs.

[0014] 3. By aligning the gaps between the telescopic end and the driven end of the drive cylinder, when the telescopic end of the drive cylinder extends to push the door open, it can quickly contact and push the driven end to drive the second locking element to unlock. After the telescopic end of the drive cylinder retracts to pull the door closed, the telescopic end can quickly disengage from the driven end, so that the second locking element can be quickly locked by the elastic element, thereby improving the linkage efficiency and linkage stability of the telescopic end and the driven end of the drive cylinder.

[0015] 4. By setting a roller at the lower end of the driven end and rounding the corners of the telescopic end, the telescopic end always makes linear rolling contact when pushing the driven end, thereby reducing the contact area when the two are linked, reducing the wear generated when the two are linked, extending the service life of both, and improving the linkage stability of the telescopic end and the driven end of the drive cylinder.

[0016] 5. By setting a number of first and second locking teeth, the second locking member and the first locking member can achieve a multi-level locking effect after being engaged by a number of second and first locking teeth, thereby improving the locking strength of the automatic locking device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an automatic locking device for vehicle doors.

[0018] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0019] Figure 3 This is a schematic diagram showing the unlocked state of the automatic locking device after the door is opened.

[0020] Figure 4 A schematic diagram showing the door fully open and the automatic locking device unlocked. Detailed Implementation

[0021] To facilitate understanding by those skilled in the art, the structure of this utility model will now be described in further detail with reference to the accompanying drawings: refer to Figure 1-4 An automatic locking device for vehicle doors is disclosed. The vehicle includes a compartment 5 with doors 6. Specifically, the automatic locking device is mainly used in vacuum trucks. The compartment 5 of the vacuum truck is a tank. A sealing strip for sealing is provided between the doors 6 and the compartment 5. The number of automatic locking devices can be set to several groups and located on both sides of the vehicle. Preferably, the number of automatic locking devices is set to two and symmetrically located on both sides of the vehicle. The automatic locking device includes: The first locking element 1 is provided on the carriage 5 and has a first latching part 11; The second locking member 2 is rotatably mounted on the door body 6. The first locking member 1 includes a locking end 21, and the locking end 21 is provided with a second locking part 211 that rotatably corresponds to the first locking part 11. The driving mechanism includes a first driving member 3 and a second driving member 4. The first driving member 3 is used to drive the door 6 to close or open. Both the first driving member 3 and the second driving member 4 are used to drive the second locking member 2 to rotate. When the first driving member 3 drives the door 6 to close, the second driving member 4 drives the second locking member 2 to rotate until the second engaging part 211 engages with the first engaging part 11. When the first driving member 3 drives the door 6 to open, it drives the second locking member 2 to rotate until the first engaging part 11 disengages from the second engaging part 211. After the second engaging part 211 engages with the first engaging part 11, the first engaging part 11 is used to prevent the second engaging part 211 from moving in the direction of opening the door 6.

[0022] The above structure, through the addition of the first locking member 1 and the second locking member 2, and the provision of a drive mechanism including the first driving member 3 and the second driving member 4 for dual drive, allows the second locking member 2 to automatically rotate to engage the first locking member 11 of the first locking member 1 through the second locking member 211 when the door 6 is closed, thereby automatically locking the door 6. Under the action of the first locking member 11 preventing the second locking member 211 from moving in the direction of opening the door 6, even during the sewage discharge stage, when the first driving member 3 is somewhat loose and the internal pressure of the carriage 5 increases, the locking action of the first locking member 11 and the second locking member 211 can still prevent the door 6 from loosening and creating a gap between it and the carriage 5, thus avoiding sewage leakage from the carriage 5 and greatly improving the stability of the door 6 locking.

[0023] To improve the efficiency of automatic unlocking and automatic locking, the door 6 is rotatably connected to the carriage 5. The first driving component 3 is a driving cylinder, and the second driving component 4 is an elastic component. Specifically, the elastic component is a spring, and the driving cylinder can be a hydraulic cylinder. The second locking component 2 also includes a driven end 22 corresponding to the extension end of the driving cylinder. One end of the driving cylinder is rotatably connected to the side of the carriage 5, and the other end is movably connected to the side of the door 6. One end of the elastic component is rotatably connected to the side of the door 6, and the other end is rotatably connected to the locking end 21. The elastic component is used to drive the locking end 21 to rotate until the second engaging part 211 engages with the first engaging part 11. Through the arrangement of the driving cylinder and the elastic component, when the extension end of the driving cylinder extends and drives the door 6 to rotate and open, it pushes the driven end 22 to cause the second locking component 2 to rotate and disengage from the first locking component 1. When the driven end 22 is pushed backward, the locking end 21 disengages from the first locking member 1, thereby allowing the second locking member 2 to unlock as the door 6 opens. This avoids situations where the door 6 cannot be opened due to slow unlocking, or where the first locking member 1 and the second locking member 2 are damaged due to excessive force, thus improving the efficiency and stability of the automatic unlocking device. When the extension end of the drive cylinder retracts, it drives the door 6 to rotate and close, disengaging from the driven end 22. The second locking member 2 is driven by the elastic member to reset and rotate until the second latching part 211 latches the first latching part 11. This ensures that after the door 6 is closed, the second locking member 2 quickly rotates into position and locks due to the elastic force of the elastic member, avoiding situations where the door cannot be closed or where the first locking member 1 and the second locking member 2 are damaged due to excessive force. This improves the efficiency and stability of the automatic locking device. In summary, through the linkage between the extension end of the drive cylinder and the driven end 22 of the second locking component 2, the unlocking and locking of the automatic locking device can be carried out automatically and stably with the opening and closing of the door 6, without the need to add electrical components such as sensors, thus reducing control costs.

[0024] To improve the linkage efficiency and stability of the extension end and driven end 22 of the drive cylinder, the first locking member 1, the second locking member 2, and the drive cylinder are arranged sequentially from top to bottom. The first locking member 1 is arranged horizontally and has a first latching part 11 extending to the side of the door body 6 at its bottom. The upper part of the locking end 21 has a second latching part 211. After the door body 6 is closed, the second locking member 2 is driven by the elastic member to reset and rotate to the horizontal arrangement of the locking end 21 and the second latching part 211 latches the first latching part 11. The driven end 22 is arranged vertically. The horizontal gap of the extension end of the drive cylinder corresponds to the side of the driven end 22 near the carriage 5. Specifically, the second locking member 2 is L-shaped. The above structure aligns the gap between the telescopic end of the drive cylinder and the driven end 22, so that when the telescopic end of the drive cylinder extends to push the door 6 open, it can quickly contact and push the driven end 22 to drive the second locking member 2 to unlock. After the telescopic end of the drive cylinder retracts to pull the door 6 closed, the telescopic end can quickly disengage from the driven end 22, so that the second locking member 2 can be quickly locked by the elastic member, thereby improving the linkage efficiency and linkage stability of the telescopic end of the drive cylinder and the driven end 22.

[0025] To extend the service life of the extension / retraction end and driven end 22 of the drive cylinder, a roller 221 is rotatably provided at the lower end of the driven end 22. The extension / retraction end of the drive cylinder is rounded and rolls against the driven end 22 via the roller 221. This structure, by providing the roller 221 at the lower end of the driven end 22 and rounding the corners of the extension / retraction end, ensures that the extension / retraction end always maintains linear rolling contact when pushing the driven end 22. This reduces the contact area during their linkage, decreases wear, extends their service life, and improves the linkage stability between the extension / retraction end and the driven end 22 of the drive cylinder.

[0026] To improve locking strength, the first engaging portion 11 is configured with a plurality of first locking teeth arranged laterally and inclined towards the closing direction of the door 6, and the second engaging portion 211 is configured with a plurality of second locking teeth corresponding to the plurality of first locking teeth and inclined towards the opening direction of the door 6. This structure, through the arrangement of the plurality of first and second locking teeth, enables a multi-level engagement effect between the second locking member 2 and the first locking member 1 by the engagement of the plurality of second locking teeth and the plurality of first locking teeth, thereby improving the locking strength of the automatic locking device.

[0027] To further improve the linkage stability between the telescopic end and the driven end 22 of the drive cylinder, the upper end of the door body 6 is rotatably connected to the upper rear side of the carriage 5. A limiting post 61 protrudes from the side of the door body 6, and the telescopic end of the drive cylinder has a guide hole 31 that extends forward and backward and is movably fitted onto the outside of the limiting post 61. Through the cooperation of the limiting post 61 and the guide hole 31, the above structure ensures that the telescopic end of the drive cylinder maintains a fixed movement path while driving the door body 6 to close and open, and can stably push and disengage the driven end 22. This further improves the linkage stability between the telescopic end and the driven end 22 of the drive cylinder, as well as the stability of the drive cylinder in driving the door body 6 to open and close.

[0028] Working principle: Door 6 opening process: The extension end of the drive cylinder pushes the door 6 to rotate and open from the horizontal to the rear and upward. At the same time, it first pushes the driven end 22 to swing backward so that the locking end 21 gets off the first locking member 1, thereby realizing automatic unlocking. After the extension end of the drive cylinder is pushed to the rear and upward tilted state, under the angle change of the extension end and the pulling force of the elastic member, the driven end 22 moves forward along the upper end of the extension end of the drive cylinder but does not disengage. During the closing process of the door 6: As the extension end of the drive cylinder retracts and gradually returns to the lateral position, the driven end 22 is pushed and swings back again, and the elastic element is stretched again until the extension end of the drive cylinder retracts to disengage from the driven end 22. Then, the elastic element drives the second locking element 2 to rotate to the locking end 21 and swings up. It engages with several first locking teeth through several second locking teeth, thereby achieving automatic locking.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic door locking device for a vehicle, the vehicle comprising a carriage (5) with a door (6), characterized in that, The automatic locking device includes: The first locking element (1) is provided on the carriage (5) and has a first locking part (11). The second locking member (2) is rotatably mounted on the door body (6). The first locking member (1) includes a locking end (21), and the locking end (21) is provided with a second locking part (211) that rotatably corresponds to the first locking part (11). The driving mechanism includes a first driving member (3) and a second driving member (4). The first driving member (3) is used to drive the door (6) to close or open. Both the first driving member (3) and the second driving member (4) are used to drive the second locking member (2) to rotate. When the first driving member (3) drives the door (6) to close, the second driving member (4) drives the second locking member (2) to rotate until the second locking part (211) engages with the first locking part (11). When the first driving member (3) drives the door (6) to open, the second locking member (2) rotates until the first locking part (11) disengages from the second locking part (211). After the second locking part (211) engages with the first locking part (11), the first locking part (11) is used to prevent the second locking part (211) from moving in the direction of opening the door (6).

2. The automatic locking device for a vehicle door as described in claim 1, characterized in that, The door (6) is rotatably connected to the carriage (5). The first driving member (3) is a driving cylinder, and the second driving member (4) is an elastic member. The second locking member (2) also includes a driven end (22) corresponding to the extension end of the driving cylinder. One end of the driving cylinder is rotatably connected to the side of the carriage (5), and the other end is movably connected to the side of the door (6). One end of the elastic member is rotatably connected to the side of the door (6), and the other end is rotatably connected to the locking end (21). The elastic member is used to drive the locking end (21) to rotate. The second locking part (211) engages with the first locking part (11); when the extension end of the drive cylinder extends to drive the door body (6) to rotate and open, it pushes the driven end (22) to drive the second locking member (2) to rotate and disengage from the first locking member (1). When the extension end of the drive cylinder retracts to drive the door body (6) to rotate and close, it disengages from the driven end (22). The second locking member (2) is driven by the elastic member to reset and rotate to the second locking part (211) to engage with the first locking part (11).

3. The automatic locking device for a vehicle door as described in claim 2, characterized in that, The first locking member (1), the second locking member (2), and the drive cylinder are arranged sequentially from top to bottom. The first locking member (1) is arranged horizontally and has a first latching part (11) extending to the side of the door body (6) at the bottom. The upper part of the locking end (21) is provided with the second latching part (211). After the door body (6) is closed, the second locking member (2) is driven by the elastic member to reset and rotate to the locking end (21) being arranged horizontally and the second latching part (211) latching the first latching part (11). The driven end (22) is arranged vertically, and the horizontal gap of the extension end of the drive cylinder corresponds to the side of the driven end (22) near the carriage (5).

4. The automatic locking device for a vehicle door as described in claim 3, characterized in that, The lower end of the driven end (22) is provided with a roller (221), and the extension end of the drive cylinder is rounded and pushes the driven end (22) by the roller (221).

5. The automatic locking device for a vehicle door as described in claim 2, characterized in that, The first latching part (11) is configured as a plurality of first latching teeth arranged in a horizontal direction and inclined toward the closing direction of the door (6), and the second latching part (211) is configured as a plurality of second latching teeth corresponding to the plurality of first latching teeth and inclined toward the opening direction of the door (6).

6. The automatic locking device for a vehicle door as described in claim 2, characterized in that, The upper end of the door (6) is rotatably connected to the upper rear side of the carriage (5). The side of the door (6) is provided with a limiting post (61). The telescopic end of the drive cylinder is provided with a guide hole (31) that extends forward and backward and is movably sleeved on the outside of the limiting post (61).

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