Automatic hydraulic lifting device for rear door of carriage

Abstract

The utility model relates to a carriage rear door hydraulic automatic lifting device which comprises an oil cylinder, a connecting block, a rear door frame and a carriage rear door, an oil pump is fixedly installed on a tricycle frame, a sliding rail is fixedly installed on the surface of a carriage rear stand column through a bolt, and the rear door frame is movably connected with the sliding rail through a sliding block. The outer side of the carriage rear stand column is hinged to the upper end of an oil cylinder through a support, and the lower end of the oil cylinder is hinged to the rear door frame through a connecting block. The oil pump is connected with the oil cylinder; the lifting function is provided for the rear door of the cargo compartment through the sliding rails and the oil cylinder, so that the rear door of the cargo compartment can lift or descend cargoes, and the labor intensity of loading and unloading workers is effectively reduced.

Description

Technical Field

[0001] This utility model relates to a liftable carriage, specifically a hydraulic automatic lifting device for the rear door of the carriage. Background Technology

[0002] Three-wheeled vehicles are used in many scenarios due to their price advantage. However, during the loading process, some heavier goods need to be manually moved into the cargo box. Workers usually need to lift the goods to a height of 1.5 meters before putting them into the cargo box. This method of handling is extremely physically demanding and labor-intensive, and loading and unloading personnel cannot continuously perform loading and unloading.

[0003] Currently, patent publication number CN104859726A discloses a high-precision centering and positioning device. The automatic tailgate of the truck includes a cargo box floor, a support frame, a tailgate, and actuators. This invention achieves three actions—flipping, lifting, and lateral movement—of the automatic tailgate through a flipping actuator, a lifting actuator, and a lateral movement actuator. These three actions do not interfere with each other, enabling the opening and closing of the tailgate and flexible unloading and loading. This improves cargo loading and unloading efficiency, reduces the labor intensity of workers, and accelerates logistics and distribution efficiency. All three actuators use linear actuators as the power source, which, compared to hydraulic systems, offer reliable structure, simple control, and lower cost.

[0004] As can be seen from the above-disclosed technical content, as prior art, the invention with announcement number CN104859726A controls the lifting and lowering of the tailgate through a variety of linkages and hydraulic rods. However, the structure of this device is relatively complex. Although it has a high load-bearing capacity, it occupies a large space and is not suitable for use in the cargo box of a tricycle. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a hydraulic automatic lifting device for the rear door of the cargo compartment, which can automatically lift the goods to the height of the cargo box floor, effectively reducing the labor intensity of the staff.

[0006] To achieve the above objectives, this utility model provides a hydraulic automatic lifting device for the rear door of a vehicle, comprising an oil pipe, a rear column of the vehicle body, bolts, an oil pump, a slide rail, an oil cylinder, a connecting block, a rear door frame, and a rear door of the vehicle body. The oil pump is fixedly installed on the tricycle frame, the slide rail is fixedly installed on the surface of the rear column of the vehicle body by bolts, the rear door frame is movably connected to the slide rail by a slider, and the lower part of the rear door frame is fitted with an outward-opening rear door of the vehicle body via a steel hinge. The upper end of the oil cylinder is hinged to the outer side of the rear column of the vehicle body via a bracket, and the lower end of the oil cylinder is hinged to the rear door frame via a connecting block. The oil pump is connected to the oil cylinder via an oil pipe, and a limiting protrusion supporting the rear door of the vehicle body is provided at the lower part of the rear door frame.

[0007] In addition, the hydraulic automatic lifting device for the rear door of the carriage proposed in the above embodiments of this utility model may also have the following additional technical features:

[0008] As a further improvement of this utility model, a pin is fixedly installed on the upper outer side of the rear door of the carriage, and a pin hole is opened in the rear door frame corresponding to the pin.

[0009] As a further improvement of this utility model, limiting blocks are provided at both the top and bottom of the slide rail.

[0010] As a further improvement of this utility model, the lower part of the rear door frame and the tricycle frame are reinforced by a buckle.

[0011] As a further improvement of this utility model, a reversible loading and unloading ramp is installed on the upper part of the rear door of the carriage via a pivot.

[0012] By means of the above solution, this utility model has at least the following advantages: compared with the conventional tricycle cargo box, the rear door of the cargo box is provided with lifting function through the slide rail and hydraulic cylinder, so that the cargo can be raised or lowered, effectively reducing the labor intensity of loading and unloading workers. Attached Figure Description

[0013] Figure 1 This is an exploded view of the hydraulic automatic lifting device for the rear door of the carriage;

[0014] In the diagram: 1. Oil pipe, 2. Rear pillar of the carriage, 3. Bolt, 4. Oil pump, 5. Slide rail, 6. Oil cylinder, 7. Connecting block, 8. Rear door frame, 9. Rear door of the carriage. Detailed Implementation

[0015] The hydraulic automatic lifting device for the rear door of the vehicle of this utility model is described below with reference to the accompanying drawings.

[0016] In Embodiment 1 of this application, as Figure 1 As shown, the hydraulic automatic lifting device for the rear door of this vehicle (hereinafter referred to as "this invention") includes a rear door frame 8 and a rear door 9. The oil pump 4 is fixedly installed on the tricycle frame. The slide rail 5 is fixedly installed on the surface of the rear column 2 of the vehicle by bolts 3. The rear door frame 8 is movably connected to the slide rail 5 by a slider. The rear door 9 of the vehicle is installed on the lower part of the rear door frame 8 by a steel hinge. The upper end of the oil cylinder 6 is hinged to the outer side of the rear column 2 of the vehicle by a bracket. The lower end of the oil cylinder 6 is hinged to the rear door frame 8 by a connecting block 7. The oil pump 4 is connected to the oil cylinder 6 by an oil pipe 1. The lower part of the rear door frame 8 is provided with a limiting protrusion to support the rear door 9. A pin is fixedly installed on the upper outer side of the rear door 9, and a pin hole is opened in the rear door frame 8 corresponding to the pin.

[0017] A high-precision centering and positioning device (hereinafter referred to as "the patent") with invention announcement number CN104859726A controls the lifting and lowering of the tailgate through multiple linkages and hydraulic rods. However, the structure of this device is relatively complex. Although it has a high load-bearing capacity, it occupies a large space and is not suitable for use in the cargo box of a tricycle. In contrast, the present invention provides the lifting and lowering function of the rear door of the cargo box through the slide rail 5 and the hydraulic cylinder 6, so that the cargo can be raised or lowered. Only one hydraulic pump 4 needs to be installed under the frame to drive the device. It occupies very little space and can effectively adapt to the working environment of the rear box of a tricycle.

[0018] This second embodiment is structurally similar to the first embodiment, except that the lower part of the rear door frame 8 and the tricycle frame are reinforced with a buckle. This effectively improves the connection strength between the rear door frame 8 and the vehicle body, preventing cargo from damaging the slide rail 5.

[0019] To further optimize the working efficiency of this application and prevent the rear door frame 8 from slipping, limit blocks are provided at both the top and bottom of the slide rail 5. To further improve loading and unloading efficiency and allow goods to be directly pushed onto the rear door 9 of the carriage, a tiltable loading and unloading ramp is installed on the upper part of the rear door 9 of the carriage via a pivot.

[0020] When this utility model is used, its specific operation is as follows:

[0021] In operation, the hydraulic pump 4 is controlled by pressing the up button mounted on the driver's seat. When descent is required, first unlock the latch between the rear door frame 8 and the rear door 9 of the cargo box, and lay the rear door 9 flat. At this time, the limiting protrusion supporting the rear door 9 at the bottom of the rear door frame 8 ensures that the rear door 9 is in a flat position. Then, the hydraulic pump 4 drives the hydraulic cylinder 6 to extend through the hydraulic pipe 1. The extended hydraulic cylinder 6 drives the rear door frame 8 to descend along the slide rail 5. When the rear door 9 descends to the ground, the operator controls the hydraulic pump 4 to stop using the button. Then, the operator pushes the goods onto the rear door 9 and restarts the hydraulic pump 4 by pressing the up button, causing the hydraulic cylinder 6 to retract. The retracted hydraulic cylinder 6 drives the rear door frame 8 to rise along the slide rail 5, and the rear door 9 rises together. The rising rear door 9 will simultaneously lift the goods to the same level as the cargo box floor. Then, the operator can push the goods into the cargo box. The operation of raising and lowering the rear door frame 8 requires manual control by the operator throughout to prevent damage to the equipment.

[0022] To simplify the operation process, limit photoelectric sensors can be installed on the surface of the limit blocks at the upper and lower ends of the slide rail 5. After the slider of the rear door frame 8 contacts the limit block, the oil pump 4 will be automatically stopped to prevent damage to the oil pump 4.

[0023] In summary, the hydraulic automatic lifting device for the rear door of the cargo compartment in this embodiment of the utility model provides lifting and lowering functions for the rear door of the cargo compartment through the slide rail 5 and the oil cylinder 6, which can raise or lower the cargo and effectively reduce the labor intensity of loading and unloading workers.

[0024] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. Hydraulic automatic lifting device for a rear door of a vehicle, comprising an oil pump (4) and a rear door (9) of a vehicle, characterized in that, The oil pump (4) is fixedly installed on the tricycle frame, the slide rail (5) is fixedly installed on the surface of the rear stand column (2) of the carriage through the bolt (3), the rear door frame (8) is movably connected with the slide rail (5) through the sliding block, the lower part of the rear door frame (8) is provided with the outer opening carriage rear door (9) through the steel hinge, the outer side of the rear stand column (2) of the carriage is hinged with the upper end of the oil cylinder (6) through the support, the lower end of the oil cylinder (6) is hinged with the rear door frame (8) through the connecting block (7), the oil pump (4) is connected with the oil cylinder (6) through the oil pipe (1), and the rear door frame (8) is provided with the limiting protrusion for supporting the carriage rear door (9).

2. The hydraulic automatic lifting device for a rear door of a vehicle compartment according to claim 1, characterized by The upper side of the carriage rear door (9) is fixedly provided with the bolt, and the bolt is provided with the pin hole corresponding to the rear door frame (8).

3. The hydraulic automatic lifting device for a rear door of a vehicle compartment according to claim 2, characterized by The slide rail (5) is provided with the limiting block upwards and downwards.

4. The hydraulic automatic lifting device for a rear door of a vehicle compartment according to claim 1, characterized by The rear door frame (8) is reinforced through the buckle between the lower part and the tricycle frame.

5. The hydraulic automatic lifting device for a rear door of a vehicle compartment according to claim 4, characterized by The upper part of the carriage rear door (9) is provided with the detachable slope which can be turned through the rotating shaft.

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