Transport vehicle with compartment lifting and material carrying functions

Abstract

The utility model relates to the technical field of transport devices, in particular to a transport vehicle with a compartment lifting and material carrying function. The vehicle head and the carriage are mutually independent, the carriage is lifted up and down through the front parallel four-connecting-rod mechanism, the mechanism is formed by hinging two connecting rods which are arranged in the same vertical plane in parallel, and the operation is flexible under the driving of a power source. A rear fork is hinged to the tail of the carriage, and a rear wheel is installed on the rear fork, so that the stability and controllability of the vehicle are enhanced. In addition, a rear parallel four-connecting-rod mechanism is added, so that the carriage is lifted more stably, a driving rod is fixedly connected with a connecting rod, and a driven rod is hinged to a rear fork, so that synchronous movement with a front parallel four-connecting-rod mechanism is ensured. Due to the design, the height of the carriage can be conveniently adjusted as required during loading and unloading, the operation difficulty is reduced, the working efficiency is improved, the overall operation is flexible and convenient, and the carriage is a preferred tool in the field of material carrying.

Description

Technical Field

[0001] The utility model relates to the technical field of transport devices, in particular to a transport vehicle with the functions of lifting and lowering materials in a carriage and transporting materials. Background Art

[0002] Currently, transport trucks typically have carriages fixed to chassis to transport cargo. However, during loading and unloading, the chassis's height above the ground makes this difficult. Current approaches include: For small-scale manual transport, inclined bridges are often used to facilitate this; for larger-volume transport, companies pre-cast dedicated platforms, the height of which equals the chassis, to facilitate mechanized transport. Regardless of the approach, additional supporting costs are inevitable. Furthermore, inclined bridges are inconvenient and dangerous to use, and platforms require a single location for transport and are not portable. In this regard, in the prior art, there are indeed designs that can adjust the height of the carriage to facilitate cargo transportation, such as the patent number "CN202465184U" entitled "A liftable vehicle-mounted carriage", the patent number "CN219134394U" entitled "A liftable electric vehicle carriage for agricultural unloading", and the patent number "CN109572515A" entitled "A height-adjustable unloading carriage"; however, this type of design still does not solve the problem of "excessive loading and unloading height", that is, the current design concept still maintains the height of the frame chassis, achieving the purpose of "further increasing the loading and unloading height", which is obviously contrary to the idea of "lowering the loading and unloading height" expected by technical personnel in this field, and therefore, it needs to be solved urgently. Utility Model Content

[0003] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a transport vehicle with a compartment lifting and material handling function. The present invention can achieve a controllable lifting effect on the compartment height, so that the loading and unloading height can be conveniently lowered as needed during loading and unloading, and the operation is flexible and convenient.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A transport vehicle with a car body lifting and material handling function comprises a head and a car body that are independent of each other. Two connecting rods arranged parallel to each other in the same vertical plane are hinged between the rear of the head and the front of the car body to form a front parallel four-bar linkage mechanism that can lift the car body up and down under the drive of a power source. A rear fork is hinged at the rear of the car body, and a rear wheel is rotatably mounted on the rear fork.

[0006] A rear parallel four-bar linkage is installed between the rear fork and the front parallel four-bar linkage. The active rod in the rear parallel four-bar linkage is fixedly connected to any link, and the driven rod in the rear parallel four-bar linkage is hinged to the rear fork to perform synchronous movement with the front parallel four-bar linkage to drive the rear fork to swing.

[0007] As a further solution of the present invention: the front of the vehicle is mounted on the front frame, the vehicle body is mounted on the rear frame, and two connecting rods are hinged between the front frame and the rear frame.

[0008] As a further solution of the present invention: the power source includes a driving rod whose ends are hinged to the front frame and the rear frame respectively, and the driving rod and the connecting rod are parallel to each other; a telescopic rod is installed on the front frame, the bottom end of the telescopic rod is hinged to the front frame, and the telescopic end is hinged to the middle part of the driving rod, and the axes of all the hinges on the driving rod are parallel to the axes of all the hinges on the connecting rod.

[0009] As a further solution of the present invention, an extension rod is fixed to the hinged end of any connecting rod on the carriage, and the extension rod constitutes an active rod in the rear parallel four-bar linkage.

[0010] As a further solution of the present invention: a hinge seat is fixedly installed on the rear fork, the middle part of the driven rod is hinged on the hinge seat, and the hinge axis of the hinge seat and the hinge axis of the rear fork on the carriage are parallel to each other and arranged apart.

[0011] As a further solution of the present invention, the active rod and the driven rod are hinged to each other via a transmission rod.

[0012] As a further solution of the present invention, a front wheel is rotatably mounted on the bottom of the front frame.

[0013] As a further solution of the present invention, a set of front parallel four-bar linkage, rear parallel four-bar linkage, rear fork and rear wheel are arranged on both sides of the carriage.

[0014] As a further solution of the present invention, the rear fork is hinged to the rear frame.

[0015] As a further solution of the present invention, there is also a power supply inside the front of the vehicle to provide electricity for the rear wheel drive.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The front and carriage of the utility model are independent of each other, and the carriage is raised and lowered by a front parallelogram linkage. This linkage is composed of two connecting rods arranged in parallel in the same vertical plane, and is flexible in operation when driven by a power source. The rear of the carriage is hinged with a rear fork, on which the rear wheel is mounted, enhancing the stability and maneuverability of the vehicle. In addition, the addition of the rear parallelogram linkage makes the carriage raising and lowering more stable. The active rod is fixed to the connecting rod, and the driven rod is hinged to the rear fork to ensure synchronous movement with the front parallelogram linkage. This design allows the height of the carriage to be easily adjusted as needed during loading and unloading, reducing the difficulty of operation and improving work efficiency. The overall operation is flexible and convenient, making it an optimal tool in the field of material handling.

[0018] 2. The power source of this utility model consists of a drive rod hinged at both ends to the front and rear frames, respectively. This drive rod is parallel to the connecting rod. A telescopic rod is also mounted on the front frame. The bottom end of the telescopic rod is hinged to the front frame, and the telescopic end is hinged to the middle of the drive rod. The axes of all hinges remain parallel, ensuring smooth and accurate power transmission.

[0019] 3. The extension rod of the utility model constitutes the active rod in the rear parallel four-bar linkage, further enhancing the stability of the entire structure and the coordination of movement.

[0020] 4. There are many options for choosing a power source, such as a power motor, a piston cylinder, or even other known power structures, as long as they can achieve the coordinated action of the car body lifting and the parallel four-bar linkage. The present invention prefers a piston cylinder because of its huge kinetic energy, and its hydraulic system is compatible with the vehicle hydraulic system, which is more cost-effective. Of course, if a power motor is used, it only needs to ensure that the power motor can drive one of the connecting rods in the parallel four-bar linkage, which is suitable for use in electric vehicle systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a side structural diagram of the present utility model.

[0023] Figure 3 It is a structural schematic diagram of the bottom of the carriage of the present invention.

[0024] In the figure: 1. Front frame; 11. Front end; 12. Front wheel; 2. Rear frame; 21. Carriage; 211. Leaf spring; 212. Articulated rod; 213. Support rod; 214. Base; 22. Rear fork; 221. Articulated seat; 222. Rear wheel; 23. Crossbeam; 24. Stabilizer bar; 3. Power source; 31. Telescopic rod; 32. Drive rod; 4. Front parallel four-bar linkage; 41. Connecting rod; 5. Rear parallel four-bar linkage; 51. Active rod; 52. Transmission rod; 53. Driven rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1 、 Figure 2 and Figure 3 In an embodiment of the present invention, a transport vehicle with a carriage lifting and material handling function is provided, wherein a front end 11 for a driver to ride is fixedly mounted on the upper portion of the front frame 1, and a front wheel 12 is rotatably mounted on the bottom of the front frame 1. A carriage 21 for holding goods is fixedly mounted on the upper portion of the rear frame 2, and leaf springs 211 are mounted on both sides of the rear frame 2. The front ends of the two leaf springs 211 are directly hinged to the rear frame 2, and the rear ends of the leaf springs 211 are hinged to a hinge rod 212, and the other ends of the hinge rod 212 are hinged to the rear frame 2, and the hinge axes at the leaf springs 211 are parallel to the axes of the rear wheels 222. A support rod 213 is fixedly mounted in the middle portion of the leaf spring 211, and a base 214 is fixedly mounted at the bottom end of the support rod 213, and the rear fork 22 is hinged to the base 214. A crossbeam 23, which runs through the bottom of the car body 21, is connected between the two bases 214. A predetermined distance is maintained between the crossbeam 23 and the car body 21 to provide sufficient cushioning space for the leaf springs 211. To enhance the stability of the bases 214, two parallel stabilizer bars 24 are hingedly connected between the front end of the rear frame 2 and the crossbeam 23. This ensures that the support bars 213 remain relatively stable during vehicle movement, preventing them from swinging excessively.

[0027] Two rear forks 22 are symmetrically hinged on both sides of the lower portion of the rear frame 2 , and a rear wheel 222 is mounted on the rear forks 22 .

[0028] The front frame 1 and rear frame 2 are connected via a power source 3, a front parallelogram linkage 4, and a rear parallelogram linkage 5. A drive rod 32 intersects the tops of two adjacent uprights on the front and rear frames 1 and 2. A telescopic rod 31 is hingedly connected between the middle of the drive rod 32 and the front frame 1. The telescopic rod 31 is preferably a piston cylinder. The hinge axes of the hinged joints connecting the drive rod 32 and the piston cylinder, which connect the corresponding structures, are arranged along the width of the vehicle body. To increase the support power, multiple telescopic rods 31 can be provided, extending or contracting simultaneously to drive the drive rod 32 to rotate.

[0029] Two sets of connecting rods are arranged on both sides of the two columns, each set of connecting rods includes two connecting rods 41 arranged up and down in the vertical direction and parallel to the driving rod 32. The two connecting rods 41 and the two columns cooperate to form a front parallel four-bar linkage 4 for driving the rear frame 2 to move up and down.

[0030] An extension arm is fixedly mounted at the end of the lower connecting rod 41, forming an L-shaped rod with the extension arm. A hinge seat 221 is fixedly mounted on the rear fork 22, and the middle portion of the driven rod 53 is hinged to the hinge seat 221. The hinge axis of the hinge seat 221 is parallel to and spaced from the hinge axis of the rear fork 22 on the carriage 21. A transmission rod 52 is hinged between the extension arm, which serves as the active rod 51, and the driven rod 53. The extension arm, transmission rod 52, and driven rod 53 cooperate to form the rear parallelepiped linkage 5.

[0031] During use, the power source first drives the piston rod to extend and retract, causing the piston cylinder to push the drive rod 32 to swing. The drive rod 32 rotates about the hinge axis on the front frame 1, thereby driving the rear frame 2 to rise and fall in coordination with the front parallel four-bar linkage 4. At the same time, the extension arm rotates about the hinge axis of the corresponding link 41 on the rear frame 2, thereby transmitting power to the driven rod 53 through the two transmission rods 52. The driven rod 53 applies a rotational force to the front fork, causing it to rotate about its hinge axis on the rear frame 2, thereby driving the rear wheel 222 to swing, thereby cooperating with the front parallel four-bar linkage 4 to synchronously drive the rear frame 2 up and down.

[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A transport vehicle with a compartment lifting and material handling function, characterized in that: The invention comprises a locomotive head (11) and a carriage (21) which are independent of each other. Two connecting rods (41) are hingedly connected between the rear of the locomotive head (11) and the front of the carriage (21) and are arranged parallel to each other in the same vertical plane. The locomotive head (11) and the carriage (21) are matched to form a front parallel four-bar linkage (4) which can move the carriage (21) up and down under the drive of a power source (3). A rear fork (22) is hingedly connected to the rear of the carriage (21), and a rear wheel (222) is rotatably mounted on the rear fork (22). A rear parallel four-bar linkage (5) is installed between the rear fork (22) and the front parallel four-bar linkage (4). An active rod (51) in the rear parallel four-bar linkage (5) is fixedly connected to any connecting rod (41). A driven rod (53) in the rear parallel four-bar linkage (5) is hinged to the rear fork (22) to perform synchronous movement with the front parallel four-bar linkage (4) to drive the rear fork (22) to swing.

2. A transport vehicle with a compartment lifting and material handling function according to claim 1, characterized in that: The vehicle head (11) is mounted on a front vehicle frame (1), the vehicle body (21) is mounted on a rear vehicle frame (2), and two connecting rods (41) are hinged between the front vehicle frame (1) and the rear vehicle frame (2).

3. The transport vehicle with the function of lifting and handling materials in the carriage according to claim 2, characterized in that: The power source (3) comprises a driving rod (32) with both ends hinged to the front frame (1) and the rear frame (2), and the driving rod (32) and the connecting rod (41) are parallel to each other; a telescopic rod (31) is installed on the front frame (1), the bottom end of the telescopic rod (31) is hinged to the front frame (1), and the telescopic end is hinged to the middle part of the driving rod (32), and the axes of all hinged parts on the driving rod (32) are parallel to the axes of all hinged parts on the connecting rod (41).

4. A transport vehicle with a compartment lifting and material handling function according to any one of claims 1 to 3, characterized in that: An extension rod is fixed to the hinged end of any connecting rod (41) on the carriage (21), and the extension rod constitutes an active rod (51) in the rear parallel four-bar linkage (5).

5. The transport vehicle with the function of lifting and transporting materials in the carriage according to claim 4, characterized in that: A hinge seat (221) is fixedly mounted on the rear fork (22), a middle portion of the driven rod (53) is hinged on the hinge seat (221), and a hinge axis of the hinge seat (221) and a hinge axis of the rear fork (22) on the carriage (21) are parallel to each other and are spaced apart.

6. The transport vehicle with the function of lifting and transporting materials according to claim 5, characterized in that: The active rod (51) and the driven rod (53) are hinged to each other via a transmission rod (52).

7. The transport vehicle with the function of lifting and transporting materials according to claim 6, characterized in that: The bottom of the front frame (1) is rotatably mounted with a front wheel (12).

8. The transport vehicle with the function of lifting and transporting materials according to claim 7, characterized in that: A set of front parallel four-link mechanism (4), a rear parallel four-link mechanism (5), a rear fork (22) and a rear wheel (222) are arranged on both sides of the carriage (21).

9. The transport vehicle with the function of lifting and transporting materials according to claim 8, characterized in that: The rear fork (22) is hinged on the rear frame (2).

10. The transport vehicle with the function of lifting and transporting materials according to claim 9, characterized in that: There is also a power source inside the vehicle head (11) for providing power for driving the rear wheels (222).

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