Towing substructure

Abstract

The present application belongs to the technical field of vehicle manufacturing, and discloses a traction sub-vehicle structure, which comprises a cab suspension system, a cab is installed on the upper side of the cab suspension system, the lower side of the cab suspension system is connected with a frame, the height of the cab suspension system is adjusted by an air bag assembly, the air bag assembly is communicated with a gas supply pipeline through a manual valve, the air bag assembly is connected with the gas supply pipeline in the open state of the manual valve, the height of an internal air bag of the air bag assembly is adjusted, the air bag assembly and the gas supply pipeline are independent of each other in the disconnected state of the manual valve, and the gas in the air bag assembly is discharged; the problems of small cab space and complex cab suspension control logic in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of vehicle manufacturing technology, and in particular to a tractor structure. Background Technology

[0002] Currently, the problem of full loads going out and empty returns frequently occurs in trunk logistics. This increases the empty load rate of vehicles and drives up operating costs. In order to reduce operating costs, a mother-and-child vehicle transportation mode is usually used. The mother vehicle departs fully loaded with goods, and the child vehicle follows behind fully loaded. After unloading the goods from the child vehicle and the mother vehicle, the child vehicle drives into the mother vehicle trailer on the return trip to form a combined unit. This reduces the empty mileage and fuel consumption of the child vehicle, thereby achieving the goal of reducing operating costs.

[0003] In the current technology, in order to allow the tractor to enter the mother car, two methods are usually used to reduce the height of the cab and the overall structure. One is to directly shorten the installation length and floating stroke of the air spring shock absorber in the cab suspension system, or reduce the size of the cab suspension damping pad, which reduces the cab's buffering capacity on bumpy roads and significantly reduces the ride smoothness. The other is to design the cab body to reduce its height, compressing the vertical space inside the cab, which restricts the head movement of the driver and passengers.

[0004] In addition, some models use a one-button deflation function on the air suspension shock absorbers to further reduce the height of the vehicle. However, since the air suspension shock absorbers are directly connected to the vehicle's air circuit, the deflation operation will cause the air pressure of the entire vehicle's braking system and suspension system to drop to zero. When the vehicle is restarted, the air circuit of the entire vehicle needs to be re-inflated through the air supply line, which takes 5-10 minutes to build up pressure. This seriously affects the transportation timeliness, especially in scenarios with frequent loading and unloading, where the time loss is even more significant. Summary of the Invention

[0005] The purpose of this invention is to provide a tractor structure that solves the problems of small cab space and complex cab suspension control logic in the prior art.

[0006] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a tractor structure, including a frame, on the upper side of which a cab suspension system is installed. The cab suspension system adjusts its height via an airbag assembly. The airbag assembly is connected to an air supply line via a manual valve. When the manual valve is open, the airbag assembly is connected to the air supply line, and the airbag assembly adjusts the height of the internal airbag. When the manual valve is closed, the airbag assembly and the air supply line are independent of each other, and the gas inside the airbag assembly is discharged.

[0007] Preferably, the airbag assembly includes a left front suspension airbag, a right front suspension airbag, and a rear suspension airbag. A left front height valve is installed on the left front suspension airbag, a right front height valve is installed on the right front suspension airbag, and a rear height valve is installed on the rear suspension airbag. The left front height valve adjusts the height of the left front suspension airbag, the right front height valve adjusts the height of the right front suspension airbag, and the rear height valve adjusts the height of the rear suspension airbag. The manual valve is connected to the air inlets of the left front height valve, the right front height valve, and the rear height valve respectively through a first pipeline.

[0008] Preferably, the manual valve is also connected to the air outlet of the left front height valve through a second pipeline. When the manual valve is turned on, the left front height valve operates; when the manual valve is turned off, the left front height valve discharges the air from the left front suspension airbag.

[0009] Preferably, the manual valve is also connected to the air outlet of the right front height valve through a third pipeline. When the manual valve is turned on, the right front height valve operates; when the manual valve is turned off, the right front height valve discharges the air from the right front suspension airbag.

[0010] Preferably, the manual valve is also connected to the air outlet of the rear height valve through a fourth pipeline. When the manual valve is turned on, the rear height valve operates; when the manual valve is turned off, the rear height valve discharges the air from the rear suspension airbag.

[0011] Preferably, a cab is mounted on the frame, and a top cover is mounted on the upper side of the cab, the top cover having a height of 100mm.

[0012] Preferably, a floor is installed under the cab, and a protrusion with a height of 300mm is provided on the floor. An engine is installed under the floor.

[0013] Preferably, the distance between the fenders on both sides of the cab is 2400mm.

[0014] Preferably, a front suspension rear articulated lower bracket is welded to the upper side of the frame, an articulated bracket is installed inside the front suspension rear articulated lower bracket, a soft pad is installed inside the articulated bracket, a swing arm is sleeved on the outside of the soft pad, the swing arm is rotatably mounted at the bottom of the cab, a left front suspension airbag or a right front suspension airbag is installed on the lower side of the swing arm, and the rear side of the cab is connected to the top of the rear suspension airbag by a hydraulic lock.

[0015] Beneficial effects: The on / off state between the airbag assembly and the air supply line can be changed by manually opening the valve. When the tractor needs to enter the tractor car, the gas in the airbag assembly can be discharged separately by manually opening the valve, so that the height of the tractor is lowered. The air supply line of the tractor will not lose pressure, and there is no need to re-inflate the whole vehicle afterward, which shortens the adjustment time of the tractor and improves transportation efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the manual valve connection of the present invention; Figure 2 This is a schematic diagram of the vehicle frame installation of the present invention; Figure 3 This is a front view of the main body of the driver's cab of the present invention; Figure 4 This is a side view of the main body of the cab of this invention.

[0017] In the diagram: 1. Left front suspension airbag; 2. Right front suspension airbag; 3. Rear suspension airbag; 4. Pad; 5. Control arm; 6. Articulated bracket; 7. Front suspension rear articulated lower bracket; 8. Hydraulic lock; 9. Manual valve; 10. Air supply line; 11. First line; 12. Rear height valve; 13. Left front height valve; 14. Right front height valve; 15. Fourth line; 16. Second line; 17. Third line; 18. Roof; 19. Protrusion; 20. Floor; 21. Frame; 22. Fender. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0019] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0022] The "full load on the outbound, empty return" problem, which often occurs in trunk logistics, leads to increased empty load rates and higher operating costs. To reduce costs, a mother-daughter truck transportation model is often adopted: the mother truck departs fully loaded, and the daughter truck follows fully loaded; on the return trip after unloading, the daughter truck drives into the mother truck trailer to reduce the daughter truck's empty mileage and fuel consumption. To allow the daughter truck to enter the mother truck, its height must be lowered. Existing technologies mainly use two methods: one is to shorten the stroke of the air spring shock absorbers in the cab suspension system or the size of the damping pads, but this weakens the buffering capacity on bumpy roads and reduces ride smoothness; the other is to compress the vertical space inside the cab, which restricts the head movement of the driver and passengers. Some models use one-button deflation of the suspension airbag shock absorbers to lower the height, but since the airbags are directly connected to the vehicle's air circuit, deflation will cause the air pressure in the braking and suspension systems to drop to zero. When restarting, it needs to be re-inflated, with a pressure build-up time of 5-10 minutes, which seriously affects transportation timeliness, especially in scenarios with frequent loading and unloading.

[0023] To solve the above problems, such as Figures 1 to 4 As shown, the present invention provides a tractor structure, including a frame 21, on which a cab suspension system is mounted. The cab suspension system adjusts the height through an airbag assembly. The airbag assembly is connected to an air supply line 10 through a manual valve 9. When the manual valve 9 is open, the airbag assembly is connected to the air supply line 10, and the airbag assembly controls the height of the internal airbag. When the manual valve 9 is closed, the airbag assembly and the air supply line 10 are independent of each other, and the gas in the airbag assembly is discharged.

[0024] A manual valve 9 is installed between the vehicle's main air supply line 10 and the airbag assembly that can adjust the height of the tractor unit. The manual valve 9 can disconnect the air supply line 10 from the airbag assembly. When the airbag assembly is connected to the outside world for deflation, the air pressure in the air supply line 10 and the entire vehicle will not be lost. During the process of lowering the vehicle height, the air pressure in the braking system and suspension system can still maintain its own pressure. When the manual valve 9 is open, the air supply line 10 can adjust the height of the airbag assembly, thereby adjusting the height of the vehicle. Because the manual valve 9 can make the airbag assembly and the air supply line 10 independent of each other, other systems of the tractor unit will not lose pressure. During the subsequent repressurization process, the number of parts that need to be repressurized is reduced, the adjustment time is shortened, and the transportation efficiency is improved.

[0025] The airbag assembly of the present invention includes a left front suspension airbag 1, a right front suspension airbag 2, and a rear suspension airbag 3. A left front height valve 13 is installed on the left front suspension airbag 1, a right front height valve 14 is installed on the right front suspension airbag 2, and a rear height valve 12 is installed on the rear suspension airbag 3. The left front height valve 13 adjusts the height of the left front suspension airbag 1, the right front height valve 14 adjusts the height of the right front suspension airbag 2, and the rear height valve 12 adjusts the height of the rear suspension airbag 3. A manual valve 9 is connected to the air inlets on the left front height valve 13, the right front height valve 14, and the rear height valve 12 respectively through a first pipeline 11.

[0026] With manual valve 9 in the on state, the left front height valve 13, right front height valve 14, and rear height valve 12 can adjust the height of their respective airbags, allowing the cab to be adjusted to a suitable height. By adjusting the working range of the airbags through the height valves, the suspension of the tractor unit can work at a suitable height. The left front suspension airbag 1, right front suspension airbag 2, and rear suspension airbag 3 can be independently controlled by their respective height valves, making the adjustment more flexible. The first pipeline 11 is divided into three groups connected in parallel, allowing the left front height valve 13, right front height valve 14, and rear height valve 12 to work independently.

[0027] Manual valve 9 is also connected to the outlet of the left front height valve 13 via the second pipe 16. When manual valve 9 is turned on, the left front height valve 13 operates; when manual valve 9 is turned off, the left front height valve 13 expels air from the left front suspension airbag 1. Manual valve 9 is also connected to the outlet of the right front height valve 14 via the third pipe 17. When manual valve 9 is turned on, the right front height valve 14 operates; when manual valve 9 is turned off, the right front height valve 14 expels air from the right front suspension airbag 2. Manual valve 9 is also connected to the outlet of the rear height valve 12 via the fourth pipe 15. When manual valve 9 is turned on, the rear height valve 12 operates; when manual valve 9 is turned off, the rear height valve 12 expels air from the rear suspension airbag 3.

[0028] The second pipe 16, the third pipe 17, and the fourth pipe 15 operate independently. After the manual valve 9 is disconnected, the left front height valve 13, the right front height valve 14, and the rear height valve 12 will completely discharge the left front suspension airbag 1, the right front suspension airbag 2, and the rear suspension airbag 3. Because of the manual valve, only the gas in the airbags on the tractor is completely discharged, and the air pressure in the air supply pipe 10 will not be affected. This will lower the vehicle height. The rear suspension airbag 3 is flexibly adjustable. When selecting the length of the airbag, the installation length of the left front suspension airbag 1 and the right front suspension airbag 2 is 330mm, which is the standard length of the vehicle. The upward floating travel is 30mm and the downward floating travel is 50mm. The installation length of the rear suspension airbag 3 is 310mm, with an upward floating travel of 30mm and a downward floating travel of 50mm. The above airbag height is the standard length. This can ensure the comfort and smoothness of the tractor during the driving process, while also allowing it to enter the mother tractor.

[0029] The manual valve 9 of this invention includes a valve seat, a control column slidably inserted into the valve seat, an internal pipeline on the valve seat, and a guide pipeline on the control column. When the manual valve 9 is open, the control column is pulled out, and the internal pipeline and the guide pipeline are disconnected. When the manual valve 9 is closed, the control column is inserted, and the internal pipeline and the guide pipeline overlap. The manual valve 9 used in this invention is controlled by a pull-out mechanism. When the control column is pulled out, the passage is closed and the gas flow stops. At this time, the air supply pipeline 10 and the airbag assembly are independent and do not interfere with each other. At the same time, the gas in the left front suspension airbag 1, the right front suspension airbag 2, and the rear suspension airbag 3 is discharged. When the control column is inserted, the air supply pipeline 10 is connected to the airbag assembly. The air supply pipeline 10 can adjust the height of the cab. The manual valve is controlled by a pull-out mechanism, which is convenient for the operator to operate.

[0030] The cab is mounted on the frame 21. The outer width is designed to be 2300mm. A top cover 18 is installed on the upper side of the cab. The height of the top cover 18 is 100mm. This reduces the vehicle height while maintaining the interior space height. At the same time, the fenders 22 on both sides of the cab are narrowed. The distance between the fenders 22 on both sides of the cab is 2400mm. Under the premise of meeting the tire track requirements, the widest part of the cab does not exceed 2400mm. A clearance of about 25mm is reserved on each side from the conventional trailer (internal width of about 2450mm) to ensure that the tractor can drive smoothly into the trailer of the tractor.

[0031] A floor 20 is installed under the cab, and a protrusion 19 is provided on the floor 20. The height of the protrusion 19 is 300mm. An engine is installed under the floor 20. The space on both sides of the protrusion can accommodate the driver. While leaving space for the driver, a high-power engine can be installed, ensuring that the driver and passengers can move freely in the cab and effectively improving the comfort of the cab.

[0032] The frame 21 of the present invention has a front suspension rear hinged lower bracket 7 welded on the upper side. The front suspension rear hinged lower bracket 7 has an articulated bracket 6 installed inside it. The height of the articulated bracket 6 is 190mm. A soft pad 4 is installed inside the articulated bracket 6. A swing arm 5 is sleeved on the outside of the soft pad 4. The swing arm 5 is rotatably installed at the bottom of the cab. A left front suspension airbag 1 or a right front suspension airbag 2 is installed on the lower side of the swing arm 5. The rear side of the cab is connected to the top of the rear suspension airbag 3 through a hydraulic lock 8. The hydraulic lock 8 is small in size and can reduce the height of the cab.

[0033] The front suspension rear hinged lower bracket 7 is U-shaped, and the hinged bracket 6 is installed in the front suspension rear hinged lower bracket 7 by bolts. Since the front suspension rear hinged lower bracket 7 and the hinged bracket 6 are arranged in an overlapping manner, the assembly height of the tractor can be further reduced. The diameter of the soft pad 4 is 60mm, which can improve the driving quality of the vehicle.

[0034] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A tractor structure, characterized in that, Includes a frame (21), on the upper side of which a cab suspension system is installed. The cab suspension system adjusts the height via an airbag assembly. The airbag assembly is connected to an air supply line (10) via a manual valve (9). When the manual valve (9) is open, the airbag assembly is connected to the air supply line (10), and the airbag assembly adjusts the height of the internal airbag. When the manual valve (9) is closed, the airbag assembly and the air supply line (10) are independent of each other, and the gas inside the airbag assembly is discharged.

2. The tractor structure according to claim 1, characterized in that, The airbag assembly includes a left front suspension airbag (1), a right front suspension airbag (2), and a rear suspension airbag (3). A left front height valve (13) is installed on the left front suspension airbag (1), a right front height valve (14) is installed on the right front suspension airbag (2), and a rear height valve (12) is installed on the rear suspension airbag (3). The left front height valve (13) adjusts the height of the left front suspension airbag (1), the right front height valve (14) adjusts the height of the right front suspension airbag (2), and the rear height valve (12) adjusts the height of the rear suspension airbag (3). The manual valve (9) is connected to the air inlets of the left front height valve (13), the right front height valve (14), and the rear height valve (12) respectively through a first pipeline (11).

3. The tractor structure according to claim 2, characterized in that, The manual valve (9) is also connected to the air outlet of the left front height valve (13) through the second pipeline (16). When the manual valve (9) is turned on, the left front height valve (13) is working. When the manual valve (9) is turned off, the left front height valve (13) discharges the air from the left front suspension airbag (1).

4. The tractor structure according to claim 2, characterized in that, The manual valve (9) is also connected to the air outlet of the right front height valve (14) through the third pipeline (17). When the manual valve (9) is turned on, the right front height valve (14) is working. When the manual valve (9) is turned off, the right front height valve (14) discharges the air from the right front suspension airbag (2).

5. The tractor structure according to claim 2, characterized in that, The manual valve (9) is also connected to the air outlet of the rear height valve (12) through the fourth pipeline (15). When the manual valve (9) is turned on, the rear height valve (12) is working. When the manual valve (9) is turned off, the rear height valve (12) discharges the air from the rear suspension airbag (3).

6. The tractor structure according to claim 2, characterized in that, A cab is mounted on the frame (21), and a top cover (18) is mounted on the upper side of the cab. The height of the top cover (18) is 100mm.

7. The tractor structure according to claim 6, characterized in that, A floor (20) is installed on the lower side of the cab, and a protrusion (19) is provided on the floor (20). The height of the protrusion (19) is 300mm, and an engine is installed on the lower side of the floor (20).

8. The tractor structure according to claim 6, characterized in that, The distance between the fenders (22) on both sides of the cab is 2400mm.

9. The tractor structure according to claim 6, characterized in that, A front suspension rear articulated lower bracket (7) is welded to the upper side of the frame (21). A hinge bracket (6) is installed inside the front suspension rear articulated lower bracket (7). A soft pad (4) is installed inside the hinge bracket (6). A swing arm (5) is sleeved on the outside of the soft pad (4). The swing arm (5) is rotatably installed at the bottom of the cab. A left front suspension airbag (1) or a right front suspension airbag (2) is installed on the lower side of the swing arm (5). The rear side of the cab is connected to the top of the rear suspension airbag (3) through a hydraulic lock (8).

10. The tractor structure according to claim 9, characterized in that, The diameter of the cushion (4) is 60 mm.

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