A special vehicle side door device with a multi-link mechanism for opening

Abstract

This utility model relates to a special vehicle side door device with a multi-link mechanism, comprising a frame, a left door leaf, and a right door leaf. The left and / or right door leaves are opened and closed by a multi-link drive mechanism mounted on the frame. The multi-link drive mechanism consists of a hydraulic cylinder, a first connecting plate, and a second connecting plate. The lower ends of the left and right door leaves are hinged to the side of the frame via a fourth pin. The cylinder body is hinged to the frame with its extension rod facing outwards. The first connecting plate is triangular, and its apex is hinged to the frame via a third pin. This special vehicle side door device opens the door leaf continuously as the hydraulic cylinder extension rod retracts. After unloading, the door leaf automatically closes, solving the safety problem of goods sliding out when manually opening the side door.

Description

Technical Field

[0001] This utility model relates to a special vehicle side door device, and more specifically, to a special vehicle side door device with a multi-link mechanism for opening. Background Technology

[0002] Currently, in the vehicle transportation industry, especially in the transportation of construction waste and minerals, the side doors are mostly opened manually during unloading. On-site workers turn the handle to disengage it from the lock, allowing materials to fall from one side of the truck bed. However, during the process of materials falling from the truck bed, they can easily spill onto workers standing on one side, especially with larger particles like gravel, potentially causing injury and posing a significant safety hazard. Summary of the Invention

[0003] In order to overcome the shortcomings of the above-mentioned technical problems, this utility model provides a special vehicle side door device with a multi-link mechanism for opening.

[0004] This utility model relates to a special vehicle side door device with a multi-link mechanism, comprising a frame and a left and right door leaf mounted on the frame. The frame consists of longitudinal beams, cross beams, and a base plate. The cross beams are fixed to the longitudinal beams, and the base plate is fixed to the longitudinal and cross beams. The left and / or right door leaves are opened and closed by a multi-link drive mechanism mounted on the frame. The multi-link drive mechanism consists of a hydraulic cylinder, a first connecting plate, and a second connecting plate. The lower ends of the left and right door leaves are hinged to the sides of the frame via a fourth pin. The cylinder body is hinged to the frame with its cylinder extension rod facing outwards; the first connecting plate is triangular, with the uppermost apex of the first connecting plate hinged to the frame via a third pin, the inner apex of the first connecting plate hinged to the cylinder extension rod via a first pin, and the outer apex of the first connecting plate hinged to one end of the second connecting plate via a second pin, the other end of the second connecting plate hinged to the lower end of the left or right door; when the left or right door is closed, the cylinder extension rod is extended, and as the cylinder extension rod gradually retracts, the left or right door is gradually opened.

[0005] This utility model relates to a special vehicle side door device with a multi-link mechanism for opening. The hydraulic cylinder is fixed to the vehicle frame via a hydraulic cylinder fixing plate, and the hydraulic cylinder fixing plate is fixed to the vehicle frame crossbeam via multiple hydraulic cylinder mounting plate fixing bolts. The cylinder body end of the hydraulic cylinder is hinged to the hydraulic cylinder fixing plate via a hydraulic cylinder rotating pin.

[0006] The present invention relates to a special vehicle side door device with a multi-link mechanism for opening, wherein a first locking plate is fixed on the first connecting plate and locked on the first pin to prevent axial movement, and a second locking plate is fixed on the second pin to prevent axial movement.

[0007] The beneficial effects of this utility model are as follows: The special vehicle side door device with multi-link mechanism opening of this utility model, by setting a multi-link drive mechanism composed of a hydraulic cylinder, a first connecting plate and a second connecting plate at the bottom of the vehicle frame, the apex of the triangular first connecting plate is hinged to the vehicle frame, the hydraulic cylinder telescopic rod and the second connecting plate are both hinged to the first connecting plate, and the outer end of the second connecting plate is hinged to the left or right door leaf; in this way, when the left or right door leaf is in the closed state, the hydraulic cylinder telescopic rod is in the extended state. As the hydraulic cylinder telescopic rod retracts continuously, it can drive the door leaf to open continuously. After unloading is completed, the hydraulic cylinder telescopic rod retracts and the door leaf closes automatically. This solves the problem that goods may slide out and cause personnel safety when the side door leaf is opened manually. Attached Figure Description

[0008] Figure 1 Front view of the special vehicle side door device that opens using the multi-link mechanism of this utility model;

[0009] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0010] Figure 3 This is a structural diagram of the special vehicle side door device of this utility model in the closed state;

[0011] Figure 4 This is a structural diagram of the special vehicle side door device of this utility model with the door leaf in a semi-open state;

[0012] Figure 5 This is a structural diagram of the special vehicle side door device of this utility model when the door leaf is opened to a horizontal position;

[0013] Figure 6 This is a structural diagram showing the door leaf of the special vehicle side door device of this utility model in the fully open state.

[0014] In the diagram: 1. Left door leaf; 2. Frame crossbeam; 3. Frame longitudinal beam; 4. Cylinder fixing plate; 5. Cylinder rotating pin; 6. Cylinder mounting plate fixing bolt; 7. Cylinder; 8. Cylinder telescopic rod; 9. First pin; 10. First locking plate; 11. Second locking plate; 12. Second pin; 13. Third pin; 14. Third pin fixing plate; 15. First connecting plate; 16. Fourth pin; 17. Second connecting plate; 18. Fifth pin; 19. Right door leaf. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 The figure shows a front view of the special vehicle side door device with multi-link mechanism opening according to this utility model. Figure 2Given Figure 1 The enlarged view of area A shows that the side door device of the special vehicle consists of a frame, a left door leaf 1, a right door leaf 19, and a multi-link drive mechanism. The frame is composed of frame longitudinal beams 3, frame crossbeams 2, and a floor plate. The two frame longitudinal beams 3 are arranged in parallel, and the frame crossbeams 2 are fixed at intervals to the frame longitudinal beams 3. The floor plate is fixed to the frame longitudinal beams 3 and the frame crossbeams 2. The floor plate and the side plate form the carriage. The left door leaf 1 and the right door leaf 19 are set on the side plate of the carriage. The left door leaf 1 and the right door leaf 19 shown can be opened and closed by driving only one door leaf through the multi-link drive mechanism, or both doors can be opened and closed.

[0017] The multi-link drive mechanism shown consists of a hydraulic cylinder 7, a first connecting plate 15, and a second connecting plate 17. The left door leaf 1 and the right door leaf 19 are hinged to the left and right edges of the frame via a fourth pin 16. The hydraulic cylinder 7 is positioned at the bottom of the frame with its extension rod 8 facing outwards. A hydraulic cylinder fixing plate 4 is provided at the bottom of the frame, and the hydraulic cylinder fixing plate 4 is fixed to the frame crossbeam 2 by multiple hydraulic cylinder mounting plate fixing bolts 6. The cylinder body end of the hydraulic cylinder 7 is hinged to the hydraulic cylinder fixing plate 4 via a hydraulic cylinder rotation pin 5, so that the hydraulic cylinder 7 can rotate at a certain angle during the extension and retraction of the extension rod 8.

[0018] The first connecting plate 15 shown is triangular. The uppermost corner of the first connecting plate 15 is fixed to the frame via a third pin fixing plate 14, which is fixed to the frame (e.g., the frame crossbeam 2). The uppermost corner of the first connecting plate 15 is hinged to the third pin fixing plate 14 via a third pin 13. The inner corner of the first connecting plate 15 is hinged to the end of the hydraulic cylinder telescopic rod 8 via a first pin 9. The outer corner of the first connecting plate 15 is connected to one end of the second connecting plate 17 via a second pin 12. The other end of the second connecting plate 17 is hinged to the left door leaf 1 or the right door leaf 19 (the right door leaf 19 in the figure) via a second pin 18. The hinge position of the second pin 18 with the door leaf is located above the fourth pin 16. In this way, the hydraulic cylinder 7, the first connecting plate 15, and the second connecting plate 17 form a multi-link drive mechanism that can drive the left door leaf 1 and the right door leaf 2 to close and open.

[0019] like Figures 3 to 6 As shown, structural diagrams of the special vehicle side door device of this utility model are given in the closed state, the half-open state, the open to the horizontal state, and the fully open state, respectively. Figure 3 As shown, when the left door 1 or the right door 19 is closed, the hydraulic cylinder extension rod 8 is extended. As the hydraulic cylinder extension rod 8 retracts, it pulls the first connecting plate 15 to rotate clockwise, which in turn pulls the right door 19 to rotate clockwise via the second connecting plate 17, causing the right door 19 to rotate to... Figure 4The door is in the semi-open state as shown. As the hydraulic cylinder extension rod 8 retracts further, it will drive the right door leaf 19 to move to the position shown. Figure 5 The horizontal position is shown. When the hydraulic cylinder extension rod 8 retracts to its shortest position, it drives the right door leaf 19 to move to its maximum opening angle, as shown. Figure 6 As shown.

[0020] Because the left door 1 and right door 19 use a multi-link drive mechanism for automatic opening, the problem of being injured by slipping goods when manually opening them is avoided. After unloading is completed, the hydraulic cylinder extension rod 8 extends continuously, which can automatically close the left door 1 and right door 19.

[0021] This utility model relates to a special vehicle side door device with a multi-link mechanism for opening doors. It is not limited to the type of vehicle body or the drive method, such as using a tractor power take-off or a hydraulic unit for power take-off. It is not limited to the type of side door or the vehicle model it is used on.

Claims

1. A special vehicle side door device with a multi-link mechanism for opening, comprising a frame and a left door leaf (1) and a right door leaf (19) mounted on the frame, the frame being composed of a frame longitudinal beam (3), a frame cross beam (2), and a base plate, the frame cross beam being fixed to the frame longitudinal beam, and the base plate being fixed to the frame longitudinal beam and the frame cross beam; the left door leaf and / or the right door leaf are driven to open and close by a multi-link drive mechanism mounted on the frame; characterized in that: The multi-link drive mechanism consists of a hydraulic cylinder (7), a first connecting plate (15), and a second connecting plate (17). The lower ends of the left and right door panels are hinged to the side of the frame via a fourth pin. The cylinder body is hinged to the frame with its hydraulic cylinder extension rod (8) facing outward. The first connecting plate is triangular. The upper corner of the first connecting plate is hinged to the frame via a third pin. The inner corner of the first connecting plate is hinged to the hydraulic cylinder extension rod via a first pin (9). The outer corner of the first connecting plate is hinged to one end of the second connecting plate (17) via a second pin (12). The other end of the second connecting plate is hinged to the lower end of the left or right door panel. When the left or right door panel is closed, the hydraulic cylinder extension rod (8) is extended. As the hydraulic cylinder extension rod gradually retracts, the left or right door panel is gradually opened.

2. The special vehicle side door device with multi-link mechanism opening according to claim 1, characterized in that: The cylinder (7) is fixed to the frame via the cylinder fixing plate (4). The cylinder fixing plate is fixed to the frame crossbeam (2) via multiple cylinder mounting plate fixing bolts (6). The cylinder body end of the cylinder is hinged to the cylinder fixing plate (4) via the cylinder rotating pin (5).

3. The special vehicle side door device with multi-link mechanism opening according to claim 1 or 2, characterized in that: The first connecting plate (15) is fixed with a first locking plate (10) that is locked on the first pin (9) to prevent it from moving axially, and a second locking plate (11) that is fixed on the second pin (12) to prevent it from moving axially.

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