A transport vehicle bed tailgate arrangement

Abstract

The present application relates to the transport vehicle technical field of a kind of transport vehicle carriage tailgate device, including carriage floor, carriage tailgate and hydraulic drive assembly, the carriage floor includes fixed floor, the fixed floor rear section is equipped with opening, the inside of this opening is equipped with movable floor that can move backwards, the movable floor rear end is movably connected with carriage tailgate;The hydraulic drive assembly includes first hydraulic cylinder and second hydraulic cylinder, the fixed end of first hydraulic cylinder and second hydraulic cylinder is correspondingly hinged to transport vehicle frame, the telescopic end of first hydraulic cylinder and second hydraulic cylinder is correspondingly hinged to the lower end of the carriage tailgate;The present application can form a longer ramp by hydraulic drive assembly, the ramp length is longer than the tailgate length in prior art, and the slope is smaller, which is beneficial to the loading and unloading operation of equipment with large volume and weight.

Description

Technical Field

[0001] This invention relates to the field of transport vehicle technology, and in particular to a tailgate device for a transport vehicle. Background Technology

[0002] Transport vehicles that typically carry heavy goods usually have a tailgate that can be flipped open. The length of the tailgate on existing transport vehicles generally corresponds to the height of the cargo box, and the height does not exceed 2 meters. When the tailgate is opened, the angle between it and the ground is generally greater than 30 degrees. For heavier goods, such as water-filled trucks needed for fire rescue, there are still difficulties in loading and unloading due to the large size and weight of the equipment.

[0003] Therefore, we provide a tailgate device for a transport vehicle. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention discloses a tailgate device for a transport vehicle.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A tailgate device for a transport vehicle includes a cargo box floor, a cargo box tailgate, and a hydraulic drive assembly. The cargo box floor includes a fixed floor, an opening at the rear of the fixed floor, and a movable floor that can move backward inside the opening. The rear end of the movable floor is movably connected to the cargo box tailgate. The hydraulic drive assembly includes a first hydraulic cylinder and a second hydraulic cylinder. The fixed ends of the first hydraulic cylinder and the second hydraulic cylinder are respectively hinged to the frame of the transport vehicle, and the telescopic ends of the first hydraulic cylinder and the second hydraulic cylinder are respectively hinged to the lower end of the rear panel of the cargo box. The method for operating the tailgate device includes the following steps: Step 1: The first and second hydraulic cylinders drive the tail section of the truck bed to move and flip. The movable bottom plate extends along with the tail section of the truck bed, forming a ramp with the movable bottom plate and the tail section of the truck bed tilting upwards and downwards, with the outer end of the tail section of the truck bed in contact with the ground. Step 2: Push the goods to be transported to the inner end of the rear deck of the carriage; Step 3: Using the first and second hydraulic cylinders, the tail section of the truck bed moves and flips, and the movable bottom plate moves with the tail section of the truck bed and is in a horizontal position. At the same time, the tail section of the truck bed is in a position where the outer end is higher than the inner end. At this time, the goods to be transported are in contact with the movable bottom plate so that the position of the goods to be transported is fixed. Step 4: The first and second hydraulic cylinders move the rear panel of the truck bed forward, causing the movable floor plate to reset. Step 5: The first and second hydraulic cylinders are used to reduce the tilt angle of the rear panel of the truck bed, so that the goods to be transported can be pushed from the rear panel to the floor of the truck bed. Step Six: Push the goods to be transported onto the floor of the carriage; Step 7: Using the first and second hydraulic cylinders, the outer end of the rear panel of the truck bed is turned upwards, thus sealing the rear opening of the transport vehicle's cargo compartment.

[0006] Preferably, the hydraulic drive assembly further includes a mounting bracket installed on the bottom of the rear end of the transport vehicle frame, the bottom of which has two hinged connections respectively hinged to the fixed ends of the first hydraulic cylinder and the second hydraulic cylinder.

[0007] Preferably, the opening is provided with sliding grooves arranged in the front and back directions on both sides, and the front end of the movable base plate is provided with movable parts on both sides that can move and cooperate with the sliding grooves on the same side.

[0008] Preferably, the rear end of the movable base plate is movably connected to the inner end of the tail section of the carriage via a connecting rope.

[0009] Preferably, the rear end of the lower surface of the movable base plate is hinged with a support leg that can be flipped and retracted.

[0010] Preferably, the end of the support leg away from its center of rotation is provided with a pad that is perpendicular to it.

[0011] Preferably, a U-shaped opening is provided in the middle of one side of the pad, and the closed end of the U-shaped opening is hinged to the support leg.

[0012] Preferably, the rear end of the lower surface of the movable base plate is provided with a storage groove along its length for accommodating the support legs.

[0013] Preferably, the distance between the fixed end connection of the first hydraulic cylinder and the fixed end connection of the second hydraulic cylinder is different from the distance between the telescopic end connection of the first hydraulic cylinder and the telescopic end connection of the second hydraulic cylinder.

[0014] Preferably, the rear end of the movable base plate is hinged to the inner end of the tailboard of the carriage, and the inner end of the tailboard of the carriage is provided with a stop structure that can be opened and closed.

[0015] By employing the technical solution described above, the present invention has the following beneficial effects: 1. The hydraulic drive assembly enables the hydraulic tail plate and movable base plate to form a longer ramp. Compared with the tail plate length in the prior art, the ramp is longer and the slope is smaller, which is beneficial for loading and unloading operations of equipment with large volume and weight. 2. Due to the setting of the connecting rope, the slope of the hydraulic tail plate after opening is further reduced, and combined with the hydraulic drive components, it is more convenient for loading and unloading operations of equipment with large size and weight. 3. This invention can achieve semi-automatic loading and unloading of goods through a movable base plate, a rear panel of the carriage, and a hydraulic drive assembly, thereby reducing the difficulty of loading and unloading operations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention under normal conditions; Figure 2 for Figure 1 Enlarged view of part I in the image; Figure 3 for Figure 1 Enlarged view of part II in the image; Figure 4 This is an assembly diagram of the fixed base plate and the movable base plate in this invention; Figure 5 for Figure 4 Partial sectional view of AA in the image; Figure 6 for Figure 4 A schematic diagram from the perspective of B in the middle; Figure 7 This is a schematic diagram of the structure under the usage posture of the present invention; Figure 8 This is a schematic diagram of the assembly of the support leg and the pad in this invention; Figure 9 This is an assembly diagram of another structure of the fixed base plate and the movable base plate in this invention.

[0017] In the diagram: 1. Carriage floor; 11. Fixed floor; 111. Slide groove; 12. Movable floor; 121. Movable component; 122. Storage slot; 2. Carriage tail panel; 3. Hydraulic drive assembly; 31. First hydraulic cylinder; 32. Second hydraulic cylinder; 33. Mounting bracket; 331. Hinge connection; 4. Connecting rope; 5. Support leg; 6. Pad. Detailed Implementation

[0018] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation.

[0019] Example 1, in conjunction with Appendix Figure 1-8 A transport vehicle cargo box tail panel device includes a cargo box floor 1, a cargo box tail panel 2 and a hydraulic drive assembly 3. The cargo box floor 1 includes a fixed floor 11, the rear section of which has an opening, and the inner side of the opening has a movable floor 12 that can move backward. The rear end of the movable floor 12 is movably connected to the cargo box tail panel 2. Combined with appendix Figure 6 Furthermore, the opening is provided with sliding grooves 111 arranged in the front and back direction on both sides, and the front end of the movable base plate 12 is provided with movable parts 121 on both sides that can move and cooperate with the sliding grooves 111 on the same side. Specifically, the front end of the movable base plate 12 can not only slide within the opening, but also rotate, causing the movable base plate 12 to flip. Alternatively, the front end of the movable base plate 12 can only slide within the opening, but the front end of the movable base plate 12 can rotate at the rear end of the opening, so that when the front end of the movable base plate 12 is located at the rear end of the opening, the movable base plate 12 can flip. The specific design depends on the actual production process and is not specifically limited here.

[0020] As needed, the rear end of the slide 111 is provided with a limiting structure, that is, the movable part 121 cannot be dislodged from the rear end of the slide 111.

[0021] The hydraulic drive assembly 3 includes a first hydraulic cylinder 31 and a second hydraulic cylinder 32. The fixed ends of the first hydraulic cylinder 31 and the second hydraulic cylinder 32 are respectively hinged to the frame of the transport vehicle, and the telescopic ends of the first hydraulic cylinder 31 and the second hydraulic cylinder 32 are respectively hinged to the lower end of the tail section 2 of the cargo box. Furthermore, the hydraulic drive assembly 3 also includes a mounting bracket 33 installed on the bottom of the rear end of the transport vehicle frame. The bottom of the mounting bracket 33 has two hinged connection portions 331 that are respectively hinged to the fixed ends of the first hydraulic cylinder 31 and the second hydraulic cylinder 32.

[0022] As needed, to prevent the first hydraulic cylinder 31 and the second hydraulic cylinder 32 from being parallel and of equal length, i.e., the first hydraulic cylinder 31, the second hydraulic cylinder 32, the mounting bracket 33 and the tail plate 2 of the carriage form a parallelogram structure; the distance between the fixed end connection of the first hydraulic cylinder 31 and the fixed end connection of the second hydraulic cylinder 32 is different from the distance between the telescopic end connection of the first hydraulic cylinder 31 and the telescopic end connection of the second hydraulic cylinder 32.

[0023] The method for operating the tailgate device includes the following steps: Step 1: The first hydraulic cylinder 31 and the second hydraulic cylinder 32 drive the tail section 2 of the carriage to move and flip. The movable bottom plate 12 extends along with the movement of the tail section 2, so that the movable bottom plate 12 and the tail section 2 form an inclined ramp, and the outer end of the tail section 2 is in contact with the ground. Step 2: Push the goods to be transported to the inner end of the upper panel of the rear panel 2 of the carriage; Step 3: The first hydraulic cylinder 31 and the second hydraulic cylinder 32 cause the tail panel 2 of the carriage to move and flip. The movable bottom plate 12 moves with the tail panel 2 and is in a horizontal position. At the same time, the tail panel 2 is in a position where the outer end is higher than the inner end. At this time, the goods to be transported are in contact with the movable bottom plate 12 so as to fix the position of the goods to be transported. Step 4: The first hydraulic cylinder 31 and the second hydraulic cylinder 32 move the rear panel 2 of the carriage forward, causing the movable bottom plate 12 to reset. Step 5: The tilt angle of the tail section 2 of the carriage is reduced by the first hydraulic cylinder 31 and the second hydraulic cylinder 32, so that the goods to be transported can be pushed from the tail section 2 to the bottom section 1 of the carriage. Step Six: Push the goods to be transported to the floor 1 of the carriage; Step 7: Using the first hydraulic cylinder 31 and the second hydraulic cylinder 32, the outer end of the rear panel 2 of the cargo compartment faces upward, thus sealing the rear opening of the transport vehicle cargo compartment.

[0024] This allows for semi-automatic loading and unloading of goods via a movable floor, a rear cargo box, and a hydraulic drive assembly. In other words, the goods are simply pushed onto the rear cargo box 2 (approximately 1 / 3 the height of the floor 1) manually, and then the hydraulic drive assembly is used to bring the rear cargo box 2 into a horizontal position, raising the goods to the height of the floor 1. Finally, the goods are pushed horizontally into the cargo box.

[0025] In one embodiment, combined with the appendix Figure 3 The rear end of the movable base plate 12 is movably connected to the inner end of the tail plate 2 of the carriage via a connecting rope 4. The connecting rope 4 can be a rope, belt, wire rope, or chain, depending on the requirements.

[0026] This design creates a step on the ramp, restricting the cargo from detaching from the rear panel 2 of the carriage.

[0027] Furthermore, to ensure that when the movable base plate 12 and the rear end plate 2 of the carriage form a ramp, the height of the rear end of the movable base plate 12 is higher than the height of the inner end of the rear end plate 2 of the carriage, a support leg 5 that can be flipped and retracted is correspondingly hinged to the rear end of the lower plate surface of the movable base plate 12.

[0028] Furthermore, to increase the contact area between the support leg 5 and the ground, and to prevent the lower end of the support leg 5 from inserting into the ground or damaging the cement pavement, a pad 6 is provided at the end of the support leg 5 away from its rotation center, which is perpendicular to it.

[0029] As needed, the rear end of the lower surface of the movable base plate 12 is provided with a storage groove 122 along its length for storing the support leg 5.

[0030] When the pad 6 is present, the front end of the storage groove 122 is provided with an expansion section for accommodating the pad 6; furthermore, in order to ensure that the pad 6 does not affect the reset of the movable base plate 12, a U-shaped opening is provided in the middle of one side of the pad 6, and the closed end of the U-shaped opening is correspondingly hinged to the support leg 5. Depending on the requirements, the pad 6 and the support leg 5 are connected by a damping hinge, or the U-shaped open end of the pad 6 is provided with an adsorption part that can adsorb the support leg 5.

[0031] In another embodiment, the rear end of the movable base plate 12 is hinged to the inner end of the tail plate 2 of the carriage, and the inner end of the tail plate 2 of the carriage is provided with a stop structure that can be opened and closed; that is, when needed, the stop structure can be opened or installed to block the goods to be transported, and when not needed, it can be retracted or removed.

[0032] In this embodiment, the ramp formed by the movable base plate 12 and the rear panel 2 of the carriage is a plane, and the stop structure can prevent the goods to be transported from falling off the upper end of the rear panel 2 of the carriage.

[0033] It should be noted that, since the movable base plate 12 does not bear the weight of the goods to be transported, that is, when the goods to be transported all have wheels on the bottom, in conjunction with the attached... Figure 4 When there is one movable base plate 12, the width of the movable base plate 12 is less than the distance between the wheels on both sides of the goods to be transported; combined with the attached... Figure 9 When there are multiple movable base plates 12, multiple movable base plates 12 are spaced apart along the width direction of the fixed base plate 11.

[0034] The parts of this invention not described in detail are prior art. It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to encompass all changes falling within the meaning and scope of equivalents within this invention.

Claims

1. A tailgate device for a transport vehicle, comprising a cargo box floor (1), a cargo box tailgate (2), and a hydraulic drive assembly (3), characterized in that: The carriage floor (1) includes a fixed floor (11), the rear section of the fixed floor (11) is provided with an opening, and the inner side of the opening is provided with a movable floor (12) that can move backward. The rear end of the movable floor (12) is movably connected to the carriage tail panel (2). The hydraulic drive assembly (3) includes a first hydraulic cylinder (31) and a second hydraulic cylinder (32). The fixed ends of the first hydraulic cylinder (31) and the second hydraulic cylinder (32) are respectively hinged to the frame of the transport vehicle, and the telescopic ends of the first hydraulic cylinder (31) and the second hydraulic cylinder (32) are respectively hinged to the lower end of the tailboard (2) of the cargo box. The method for operating the tailgate device includes the following steps: Step 1: The first hydraulic cylinder (31) and the second hydraulic cylinder (32) drive the tail section (2) of the carriage to move and flip. The movable bottom plate (12) extends along with the tail section (2), so that the movable bottom plate (12) and the tail section (2) form an inclined ramp, and the outer end of the tail section (2) is in contact with the ground. Step 2: Push the goods to be transported to the inner end of the upper panel of the rear panel (2) of the carriage; Step 3: The first hydraulic cylinder (31) and the second hydraulic cylinder (32) are used to move and flip the tail section (2) of the carriage. The movable bottom plate (12) moves with the tail section (2) and is in a horizontal position. At the same time, the tail section (2) is in a position where the outer end is higher than the inner end. At this time, the goods to be transported are in contact with the movable bottom plate (12) so that the position of the goods to be transported is fixed. Step 4: The tail section (2) of the carriage is moved forward by the first hydraulic cylinder (31) and the second hydraulic cylinder (32), so that the movable bottom plate (12) is reset. Step 5: The first hydraulic cylinder (31) and the second hydraulic cylinder (32) reduce the tilt angle of the rear panel (2) of the carriage, so that the goods to be transported can be pushed from the rear panel (2) to the bottom panel (1). Step 6: Push the goods to be transported to the floor of the carriage (1); Step 7: The outer end of the tail section (2) of the carriage is turned upward by the first hydraulic cylinder (31) and the second hydraulic cylinder (32), and the rear opening of the carriage of the transport vehicle is blocked.

2. The tailgate device for a transport vehicle according to claim 1, characterized in that: The hydraulic drive assembly (3) also includes a mounting bracket (33) installed on the frame of the transport vehicle near the rear bottom. The bottom of the mounting bracket (33) has two hinged connection parts (331) that are respectively hinged to the fixed ends of the first hydraulic cylinder (31) and the second hydraulic cylinder (32).

3. The tailgate device for a transport vehicle according to claim 1, characterized in that: The opening is provided with sliding grooves (111) arranged in the front and back direction on both sides, and the front end of the movable base plate (12) is provided with movable parts (121) on both sides that can move and cooperate with the sliding grooves (111) on the same side.

4. The tailgate device for a transport vehicle according to claim 1, characterized in that: The rear end of the movable base plate (12) is connected to the inner end of the tail plate (2) of the carriage by a connecting rope (4).

5. The tailgate device for a transport vehicle according to claim 4, characterized in that: The rear end of the lower plate of the movable base plate (12) is hinged with a support leg (5) that can be flipped and retracted.

6. The tailgate device for a transport vehicle according to claim 5, characterized in that: The supporting leg (5) has a pad (6) that is perpendicular to the end opposite to its rotation center.

7. The tailgate device for a transport vehicle according to claim 6, characterized in that: The pad (6) has a U-shaped opening in the middle of one side, and the closed end of the U-shaped opening is hinged to the support leg (5).

8. The tailgate device for a transport vehicle according to claim 5, characterized in that: The lower end of the movable base plate (12) is provided with a storage groove (122) along its length for storing the support leg (5).

9. A tailgate device for a transport vehicle according to claim 1, characterized in that: The distance between the fixed end connection of the first hydraulic cylinder (31) and the fixed end connection of the second hydraulic cylinder (32) is different from the distance between the telescopic end connection of the first hydraulic cylinder (31) and the telescopic end connection of the second hydraulic cylinder (32).

10. A tailgate device for a transport vehicle according to claim 1, characterized in that: The rear end of the movable base plate (12) is hinged to the inner end of the tail plate (2) of the carriage, and the inner end of the tail plate (2) of the carriage is provided with a stop structure that can be opened and closed.

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