Combined long-wheelbase header transport vehicle

Abstract

The utility model discloses a combined long-wheelbase header transport vehicle which comprises a vehicle frame and a main beam arranged in the middle of the vehicle frame and further comprises an installation mechanism used for rapidly installing and locking a header, a front wheel mechanism used for improving the passing performance of the transport vehicle and a rear wheel mechanism used for providing advancing support for the transport vehicle. The main beam is arranged on the frame, the installation mechanism is arranged on the side portion of the frame, the front wheel mechanism is assembled at one end of the main beam, and the rear wheel mechanism is arranged at the end, away from the front wheel mechanism, of the main beam. The header and the transport vehicle are locked through the header locking bolt, the header and the transport vehicle can be quickly disassembled and assembled, the transport vehicle can transport various types of headers and is suitable for being hooked with various types of combine harvesters, the use flexibility is high, a front wheel mechanism is arranged to be matched with a rear wheel mechanism, front wheels can rotate, the turning radius is small, and the transport vehicle is convenient to use. And the trafficability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a combined long-wheelbase cutter bar transport vehicle. Background Art

[0002] In the prior art, there is an increasing demand for large harvesters with large cutting widths and high efficiencies. However, large harvesters are restricted by road conditions during the transfer process, which is very inconvenient. Currently, by transferring the cutter bar to a cutter bar transport vehicle, adjusting the cutter bar from a horizontal placement to a vertical placement, and then suspending the cutter bar transport vehicle at the rear of the harvester for towing, it can smoothly pass through the road ahead. However, when the cutter bar transport vehicle is connected to the harvester through a towing rod, the height of the cutter bar transport vehicle needs to be adjusted, and in order to prevent the cutter bar from shaking during transportation, the cutter bar needs to be stably connected to the cutter bar transport vehicle. The operation is difficult and requires the cooperation of multiple staff to complete. Moreover, the existing cutter bar transport vehicle and the cutter bar adopt a separable structure, that is, the harvester disassembles the cutter bar and transports it to the transport vehicle for transportation. However, the existing cutter bar transport vehicle can only be connected to a dedicated harvester to achieve the purpose of towing, and cannot be applied to combine harvesters of different models, which has certain usage limitations and poor flexibility.

[0003] The Chinese utility model patent with the application number 202122762246.0 discloses a cutter bar transport vehicle, including: a vehicle frame for placing the cutter bar; a towing rod connected to the vehicle frame, and the towing rod is adjusted in height through a lifting bracket; at least two hanging structures arranged at intervals along the axial direction of the vehicle frame, and the hanging structures connect the cutter bar to the vehicle frame. However, this type of cutter bar transport vehicle is installed and connected to the corresponding harvester through a welded joint, and it can only be connected to a dedicated harvester to achieve the purpose of towing, and cannot be applied to combine harvesters of different models, which has certain usage limitations and poor flexibility. Moreover, the connection between this type of transport vehicle and the cutter bar is achieved through the cooperation of multiple groups of mounting rods and connecting sleeves, and its connection method is relatively cumbersome, unable to meet the requirement of quickly disassembling and assembling the two, with a slow assembly speed. It realizes a turning action under the drive of the harvester, has a large turning radius, and poor passing performance. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a combined long-wheelbase cutter bar transport vehicle.

[0005] To achieve the above purpose, the technical solution proposed by the utility model is:

[0006] A combined long-wheelbase header transporter, comprising a frame and a main beam. The main beam is arranged in the middle of the frame. It further includes a mounting mechanism for quickly installing and locking the header, a front-wheel mechanism for improving the passing performance of the transporter, and a rear-wheel mechanism for providing traveling support for the transporter. The mounting mechanism is arranged on the side of the frame. The front-wheel mechanism is assembled at one end of the main beam, and the rear-wheel mechanism is configured at the end of the main beam away from the front-wheel mechanism.

[0007] The frame includes bottom cross beams, support beams, and support side rods. There are several groups of the bottom cross beams, and several groups of the bottom cross beams are spaced apart and arranged on one side of the main beam, with one end thereof fixedly connected to the main beam. There are several groups of the support beams, and several groups of the support beams are spaced apart and arranged on the side of the main beam away from the bottom cross beams, with one end thereof fixedly connected to the main beam. There are two groups of the support side rods, and the two groups of the support side rods are respectively arranged at the ends of the bottom cross beams and the support beams away from the main beam and are fixedly connected to the corresponding bottom cross beams or support beams. The support side rods and the main beam are arranged parallel to each other.

[0008] The bottom cross beams are arranged horizontally, the support beams are arranged obliquely relative to the bottom cross beams, the length of the support side rod connected to the support beam is greater than the length of the support side rod connected to the bottom cross beam. The bottom cross beams, the support beams, and the support side rods together form a semi-inclined header chassis structure.

[0009] The mounting mechanism includes header support angle steels and pallet assemblies. The header support angle steels are arranged on the upper part of the support side rods connected to the support beams and are fixedly connected to the corresponding support side rods. There are several groups of the pallet assemblies, and several groups of the pallet assemblies are arranged side by side and spaced apart on the upper part of the support side rods connected to the bottom cross beams.

[0010] The pallet assembly includes a header pallet and a header locking bolt. The header pallet is arranged obliquely corresponding to the header support angle steel on the upper part of the support side rod connected to the bottom cross beam and is fixedly connected to the corresponding support side rod. The header locking bolt is arranged on the side of the header pallet away from the header support angle steel and penetrates through the header pallet and is inserted into the header pallet.

[0011] It further includes pallet support blocks. The pallet support blocks are arranged between the header pallet and the corresponding support side rods and are fixedly connected to the header pallet and the support side rods. The header pallet is fixedly connected to the corresponding support side rod through the pallet support blocks.

[0012] The front-wheel mechanism includes a front-wheel beam frame, a front-wheel axle, and traveling front wheels. The front-wheel beam frame is arranged at one end of the main beam and fixedly connected to the main beam. The front-wheel axle is arranged at the lower part of the end of the front-wheel beam frame far from the main beam and rotatably connected to the front-wheel beam frame. There are two sets of the traveling front wheels, and the two sets of traveling front wheels are symmetrically arranged at both ends of the front-wheel axle and rotatably connected to the front-wheel axle.

[0013] It further includes a drive bridge. The drive bridge is arranged between the front-wheel beam frame and the front-wheel axle. The drive bridge is connected to the front-wheel beam frame through a mounting flange and connected to the front-wheel axle through a front-wheel pedestal. The front-wheel axle is rotatably connected to the front-wheel beam frame through the drive bridge.

[0014] It further includes a hitch assembly. The hitch assembly includes a hitch beam and a hitch member. The hitch beam is arranged on the side of the front-wheel axle far from the main beam, and one end of the hitch beam is fixedly connected to the front-wheel axle through a front-wheel pedestal. The hitch member is arranged at the end of the hitch beam far from the front-wheel axle and fixedly connected to the hitch beam. The hitch beam is connected to a combine harvester through the hitch member.

[0015] The rear-wheel mechanism includes a rear-wheel pedestal, a rear-wheel axle, and support rear wheels. The rear-wheel pedestal is arranged at the lower part of the end of the main beam far from the front-wheel beam frame and fixedly connected to the front-wheel beam frame. The rear-wheel axle is arranged at the lower part of the rear-wheel pedestal and fixedly connected to the rear-wheel pedestal. There are two sets of the support rear wheels, and the two sets of support rear wheels are symmetrically arranged at both ends of the rear-wheel axle and rotatably connected to the rear-wheel axle. The vehicle frame is mounted on the ground through the front-wheel mechanism and the rear-wheel mechanism.

[0016] The beneficial effects of the present utility model are as follows:

[0017] An installation mechanism is provided. The cutting table is fixed through the cutting table support plate and the cutting table support angle steel, and the cutting table is locked to the transport vehicle through the cutting table locking pin. The cutting table and the transport vehicle can be quickly disassembled and assembled. Moreover, this transport vehicle can transport cutting tables of various models and is suitable for being connected to combine harvesters of various models, with strong flexibility in use. The front-wheel mechanism and the rear-wheel mechanism cooperate with each other. During the turning process, the front wheels can rotate, the turning radius is small, and the passing performance is strong. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the cooperation between the bottom cross beam and the support beam of the present utility model and the main shaft;

[0020] Figure 3 is a schematic diagram of the cooperation between the installation mechanism of the present utility model and the vehicle frame;

[0021] Figure 4 It is a schematic diagram of the cooperation between the front-wheel mechanism and the main beam of the utility model.

[0022] In the figure: 1. Main beam; 2. Bottom cross beam; 3. Support beam; 4. Support side rod; 5. Cutter table support angle steel; 6. Cutter table support plate; 7. Cutter table locking bolt; 8. Support block of the support plate; 9. Front-wheel beam frame; 10. Front-wheel axle; 11. Traveling front wheel; 12. Transmission bridge; 13. Hanging beam; 14. Hanging part; 15. Rear-wheel base; 16. Rear-wheel axle; 17. Support rear wheel. Specific implementation manner

[0023] The following further describes the present utility model in detail with reference to the accompanying drawings.

[0024] A combined long-wheelbase cutter table transport vehicle includes a vehicle frame and a main beam 1. The main beam 1 is arranged in the middle of the vehicle frame. It also includes an installation mechanism for quickly installing and locking the cutter table, a front-wheel mechanism for improving the passing performance of the transport vehicle, and a rear-wheel mechanism for providing traveling support for the transport vehicle. The installation mechanism is arranged on the side of the vehicle frame. The front-wheel mechanism is assembled at one end of the main beam 1, and the rear-wheel mechanism is configured at the end of the main beam 1 away from the front-wheel mechanism. The overall structural schematic diagram of the present utility model is as Figure 1 shown.

[0025] The vehicle frame includes a bottom cross beam 2, a support beam 3, and a support side rod 4. There are several groups of bottom cross beams 2. The several groups of bottom cross beams 2 are arranged at intervals on one side of the main beam 1 and one end of them is fixedly connected to the main beam 1. There are several groups of support beams 3. The several groups of support beams 3 are arranged at intervals on the side of the main beam 1 away from the bottom cross beam 2 and one end of them is fixedly connected to the main beam 1. There are two groups of support side rods 4. The two groups of support side rods 4 are respectively arranged at the ends of the bottom cross beam 2 and the support beam 3 away from the main beam 1 and are fixedly connected to the corresponding bottom cross beam 2 or support beam 3. The support side rod 4 is arranged parallel to the main beam 1. The bottom cross beam 2 is arranged horizontally. The support beam 3 is arranged obliquely relative to the bottom cross beam 2. The length of the support side rod 4 connected to the support beam 3 is greater than the length of the support side rod 4 connected to the bottom cross beam 2. The bottom cross beam 2, the support beam 3, and the support side rod 4 together form a semi-inclined cutter table chassis structure. The vehicle frame cooperates through the bottom cross beam 2, the support beam 3, and the support side rod 4 to jointly form a semi-inclined cutter table chassis structure, thereby providing transport support for the cutter table. Among them, the bottom cross beam 2 and the support beam 3 together form a semi-inclined beam frame structure to meet the installation requirements of the cutter table. The support side rod 4 is used as the side rod structure at the ends of the bottom cross beam 2 and the support beam 3 to serve as the support structure at the side of the vehicle frame. The schematic diagram of the cooperation between the bottom cross beam 2 and the support beam 3 of the present utility model and the main shaft is as Figure 2 shown.

[0026] The installation mechanism includes a header support angle steel 5 and a pallet assembly. The header support angle steel 5 is arranged on the upper part of a support side rod 4 connected to the support beam 3 and is fixedly connected to the corresponding support side rod 4. There are several groups of pallet assemblies, and several groups of pallet assemblies are arranged side by side at intervals on the upper part of the support side rod 4 connected to the bottom cross beam 2. The installation mechanism cooperates through the header support angle steel 5 and the pallet assembly to position and lock the header on the transport vehicle. Among them, the header support angle steel 5 is used to fix one side of the bottom of the header, and the pallet assembly is used to cooperate with the header support angle steel 5 to fix the header and achieve quick locking and positioning between the two. The schematic diagram of the cooperation between the installation mechanism of the present utility model and the vehicle frame is as shown in Figure 3 shown.

[0027] The pallet assembly includes a header pallet 6 and a header locking pin 7. The header pallet 6 is arranged obliquely corresponding to the header support angle steel 5 on the upper part of the support side rod 4 connected to the bottom cross beam 2 and is fixedly connected to the corresponding support side rod 4. The header locking pin 7 is arranged on the side of the header pallet 6 away from the header support angle steel 5 and penetrates through the header pallet 6 and is inserted into the header pallet 6. The pallet assembly cooperates through the header pallet 6 and the header locking pin 7 to fix the side of the header away from the header support angle steel 5 and achieve quick locking and positioning between the header and the transport vehicle. Among them, the header pallet 6 is used to cooperate with the header support angle steel 5 to fix the header, and the header locking pin 7 is used to connect the header and the transport vehicle and achieve quick locking and positioning between the two.

[0028] It further includes a pallet support block 8. The pallet support block 8 is arranged between the header pallet 6 and the corresponding support side rod 4 and is fixedly connected to the header pallet 6 and the support side rod 4. The header pallet 6 is fixedly connected to the corresponding support side rod 4 through the pallet support block 8. The pallet support block 8 is used as an installation support structure between the header pallet 6 and the support side rod 4 to achieve connection and fixation between the two.

[0029] The front wheel mechanism includes a front wheel beam frame 9, a front wheel shaft 10, and traveling front wheels 11. The front wheel beam frame 9 is arranged at one end of the main beam 1 and is fixedly connected to the main beam 1. The front wheel shaft 10 is arranged at the lower part of the end of the front wheel beam frame 9 away from the main beam 1 and is rotatably connected to the front wheel beam frame 9. There are two groups of traveling front wheels 11, and the two groups of traveling front wheels 11 are symmetrically arranged at both ends of the front wheel shaft 10 and are rotatably connected to the front wheel shaft 10. The front wheel mechanism cooperates through the front wheel beam frame 9, the front wheel shaft 10, and the traveling front wheels 11 to form a rotatable front wheel structure to reduce the turning radius of the transport vehicle during the turning process, thereby improving the passing performance of the transport vehicle. Among them, the front wheel beam frame 9 is used to provide installation support for the front wheel shaft 10 and connect the front wheel shaft 10 to the main beam 1. The front wheel shaft 10 is used to provide installation support for the traveling wheels and rotatably assemble the traveling wheels on the front wheel beam frame 9. The traveling front wheels 11 are used to jointly form a rotatable front wheel structure with the front wheel shaft 10. The schematic diagram of the cooperation between the front wheel mechanism of the present utility model and the main beam 1 is as shown in Figure 4as shown

[0030] It further includes a transmission bridge 12, which is arranged between the front wheel beam frame 9 and the front wheel axle 10. The transmission bridge 12 is connected to the front wheel beam frame 9 through a mounting flange and is connected to the front wheel axle 10 through a front wheel base. The front wheel axle 10 is rotationally connected to the front wheel beam frame 9 through the transmission bridge 12. Among them, the transmission bridge 12 is used to rotationally connect the front wheel axle 10 and the front wheel beam frame 9 to meet the installation requirement that the front wheel axle 10 can rotate during turning.

[0031] It further includes a hitch assembly, which includes a hitch beam 13 and a hitch member 14. The hitch beam 13 is arranged on the side of the front wheel axle 10 away from the main beam 1, and one end of it is fixedly connected to the front wheel axle 10 through a front wheel base. The hitch member 14 is arranged at the end of the hitch beam 13 away from the front wheel axle 10 and is fixedly connected to the hitch beam 13. The hitch beam 13 is connected to the combine harvester through the hitch member 14. The hitch assembly constitutes a hitch structure on the front wheel axle 10 through the cooperation of the hitch beam 13 and the hitch member 14 to realize the hitch installation between the transport vehicle and the combine harvester. Among them, the hitch beam 13 is used to provide installation support for the hitch member 14, and the hitch member 14 is used to be connected to the combine harvester to realize the hitch installation between the transport vehicle and the combine harvester.

[0032] The rear wheel mechanism includes a rear wheel base 15, a rear wheel axle 16 and supporting rear wheels 17. The rear wheel base 15 is arranged at the lower part of the end of the main beam 1 away from the front wheel beam frame 9 and is fixedly connected to the front wheel beam frame 9. The rear wheel axle 16 is arranged at the lower part of the rear wheel base 15 and is fixedly connected to the rear wheel base 15. There are two groups of supporting rear wheels 17, and the two groups of supporting rear wheels 17 are symmetrically arranged at both ends of the rear wheel axle 16 and are rotationally connected to the rear wheel axle 16. The vehicle frame is erected on the ground through the front wheel mechanism and the rear wheel mechanism. The rear wheel mechanism provides rotational support for the transport vehicle through the cooperation of the rear wheel base 15, the rear wheel axle 16 and the supporting rear wheels 17 to meet the traveling requirements of the transport vehicle. Among them, the rear wheel base 15 is used to provide installation support for the rear wheel axle 16 to realize the installation connection between the rear wheel axle 16 and the main beam 1. The rear wheel axle 16 is used to provide installation support for the supporting rear wheels 17, and the supporting rear wheels 17 are used to provide rotational support for the transport vehicle through the rear wheel axle 16 and the rear wheel base 15 to meet the traveling requirements of the transport vehicle.

[0033] Among them, when transporting the cutters of different models, the cutter is fixed by cooperating with the cutter pallets 6 and cutter support angle steels 5 at different positions, and the corresponding cutter is locked and connected to the transport vehicle through the cutter locking pin 7.

[0034] Working principle:

[0035] During use, the cutting table is installed on the upper part of the vehicle frame. The cutting table is fixed by the cutting table support plate 6 and the cutting table support angle steel 5. Then, the cutting table is locked and connected to the transport vehicle through the cutting table locking bolt 7, so as to realize the installation connection between the cutting table and the transport vehicle. Then, the transport vehicle is connected to the combine harvester through the hitch member 14, so as to realize the installation connection between the transport vehicle and the combine harvester. The wheelbase of the main beam 1 of this transport vehicle is relatively long, so it can transport the cutting tables of various models and can be connected to the combine harvesters of various models through the hitch member 14. When turning is required during driving, the front wheel structure can rotate during the turning process to reduce the turning radius of the transport vehicle, thereby improving the passing performance of the transport vehicle.

[0036] The beneficial effects of the present utility model are that it is provided with an installation mechanism. The cutting table is fixed by the cutting table support plate and the cutting table support angle steel, and the cutting table is locked and connected to the transport vehicle through the cutting table locking bolt, which can quickly disassemble and assemble the cutting table and the transport vehicle. Moreover, this transport vehicle can transport the cutting tables of various models and is suitable for being connected to the combine harvesters of various models, with strong flexibility in use. It is provided with a front wheel mechanism that cooperates with the rear wheel mechanism. During the turning process, the front wheels can rotate, with a small turning radius and strong passing performance.

[0037] The above has described in detail an embodiment of the present utility model, but the content is only the preferred embodiment of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. A combined long-wheelbase header transporter, comprising a frame and a main beam (1), the main beam (1) is arranged in the middle of the frame, characterized in that, It also includes an installation mechanism for quickly installing and locking the cutter bar, a front wheel mechanism for improving the passing performance of the transport vehicle, and a rear wheel mechanism for providing traveling support for the transport vehicle. The installation mechanism is arranged on the side of the frame. The front wheel mechanism is assembled at one end of the main beam (1), and the rear wheel mechanism is configured at the end of the main beam (1) away from the front wheel mechanism.

2. The combined long-wheelbase header transporter according to claim 1, characterized in that, The frame includes a bottom cross beam (2), a support beam (3), and support side rods (4). There are several groups of the bottom cross beam (2). The several groups of the bottom cross beam (2) are arranged at intervals on one side of the main beam (1) and one end thereof is fixedly connected to the main beam (1). There are several groups of the support beam (3). The several groups of the support beam (3) are arranged at intervals on the side of the main beam (1) away from the bottom cross beam (2) and one end thereof is fixedly connected to the main beam (1). There are two groups of the support side rods (4). The two groups of the support side rods (4) are respectively arranged at the ends of the bottom cross beam (2) and the support beam (3) away from the main beam (1) and are fixedly connected to the corresponding bottom cross beam (2) or support beam (3). The support side rods (4) and the main beam (1) are arranged parallel to each other.

3. The combined long wheelbase header transporter according to claim 2, wherein, The bottom cross beam (2) is arranged horizontally. The support beam (3) is arranged obliquely relative to the bottom cross beam (2). The length of the support side rod (4) connected to the support beam (3) is greater than the length of the support side rod (4) connected to the bottom cross beam (2). The bottom cross beam (2), the support beam (3), and the support side rods (4) together form a semi-inclined cutter bar chassis structure.

4. The combined long wheelbase header transporter according to claim 3, characterized in that, The installation mechanism includes a cutter bar support angle steel (5) and a tray assembly. The cutter bar support angle steel (5) is arranged on the upper part of the support side rod (4) connected to the support beam (3) and is fixedly connected to the corresponding support side rod (4). There are several groups of the tray assembly. The several groups of the tray assembly are arranged side by side at intervals on the upper part of the support side rod (4) connected to the bottom cross beam (2).

5. The combined long-wheelbase header transporter according to claim 4, characterized in that, The tray assembly includes a cutter bar tray (6) and a cutter bar locking bolt (7). The cutter bar tray (6) is arranged obliquely corresponding to the cutter bar support angle steel (5) on the upper part of the support side rod (4) connected to the bottom cross beam (2) and is fixedly connected to the corresponding support side rod (4). The cutter bar locking bolt (7) is arranged on the side of the cutter bar tray (6) away from the cutter bar support angle steel (5) and penetrates through the cutter bar tray (6) and is inserted into the cutter bar tray (6).

6. The combined long wheelbase header transport vehicle according to claim 5, characterized in that, It also includes a tray support block (8). The tray support block (8) is arranged between the cutter bar tray (6) and the corresponding support side rod (4) and is fixedly connected to the cutter bar tray (6) and the support side rod (4). The cutter bar tray (6) is fixedly connected to the corresponding support side rod (4) through the tray support block (8).

7. The combined long wheelbase cutter bar transporter according to claim 6, characterized in that, The front-wheel mechanism includes a front-wheel beam frame (9), a front-wheel axle (10), and traveling front wheels (11). The front-wheel beam frame (9) is arranged at one end of the main beam (1) and is fixedly connected to the main beam (1). The front-wheel axle (10) is arranged at the lower part of the end of the front-wheel beam frame (9) far from the main beam (1) and is rotatably connected to the front-wheel beam frame (9). There are two sets of the traveling front wheels (11), and the two sets of the traveling front wheels (11) are symmetrically arranged at both ends of the front-wheel axle (10) and are rotatably connected to the front-wheel axle (10).

8. The combined long wheelbase cutter bar transporter according to claim 7, characterized in that, It further includes a transmission bridge (12). The transmission bridge (12) is arranged between the front-wheel beam frame (9) and the front-wheel axle (10). The transmission bridge (12) is connected to the front-wheel beam frame (9) through a mounting flange and is connected to the front-wheel axle (10) through a front-wheel base. The front-wheel axle (10) is rotatably connected to the front-wheel beam frame (9) through the transmission bridge (12).

9. The combined long-wheelbase header transport vehicle according to claim 8, wherein, It further includes a hitch assembly. The hitch assembly includes a hitch beam (13) and a hitch member (14). The hitch beam (13) is arranged on the side of the front-wheel axle (10) far from the main beam (1), and one end of the hitch beam (13) is fixedly connected to the front-wheel axle (10) through a front-wheel base. The hitch member (14) is arranged at the end of the hitch beam (13) far from the front-wheel axle (10) and is fixedly connected to the hitch beam (13). The hitch beam (13) is hitched to a combine harvester through the hitch member (14).

10. The combined long-wheelbase header transporter according to claim 9, wherein, The rear-wheel mechanism includes a rear-wheel base (15), a rear-wheel axle (16), and support rear wheels (17). The rear-wheel base (15) is arranged at the lower part of the end of the main beam (1) far from the front-wheel beam frame (9) and is fixedly connected to the front-wheel beam frame (9). The rear-wheel axle (16) is arranged at the lower part of the rear-wheel base (15) and is fixedly connected to the rear-wheel base (15). There are two sets of the support rear wheels (17), and the two sets of the support rear wheels (17) are symmetrically arranged at both ends of the rear-wheel axle (16) and are rotatably connected to the rear-wheel axle (16). The vehicle frame is erected on the ground through the front-wheel mechanism and the rear-wheel mechanism.

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