A vehicle frame structure with liftable axle

Abstract

The vehicle frame structure with a liftable axle of the present invention comprises a vehicle frame and one or more axles arranged below the vehicle frame, the axles are composed of axles and leaf springs, front and rear suspensions are fixed below the vehicle frame, the front suspension and rear suspension are respectively provided with front pads and rear pads, the front pads and rear pads are located between the ends of the leaf springs and the inner arc plate of the suspension; the front suspension is provided with a front pad pin for fixing the front pad, and the rear suspension is provided with a rear pad pin for fixing the rear pad. The vehicle frame structure with a liftable axle of the present invention, when the vehicle has insufficient traction on an uphill section, the front and rear pads are unloaded, the bearing point of the axle is moved backward, the axle load is reduced, the saddle load is increased, the pressure of the tractor on the ground is increased, and the traction is increased, so that the climbing performance of the vehicle is increased, the tire slip is avoided, the turning performance of the vehicle is increased, and the service life of the tire is extended.

Description

Technical Field

[0001] The present invention relates to a vehicle frame structure, and more particularly to a vehicle frame structure with a liftable axle. Background Art

[0002] Due to the uncertainty of the road slope, potholes, and the radius of the bend, only short vehicles with limited total length can be used in places with limited transportation. For trucks with two or more bridges, when encountering a climbing section, most of the weight of the carriage and cargo is distributed to the axle, making the axle load larger and the saddle load of the tractor smaller, which leads to less friction between the tractor and the ground. At this time, even if the tractor has enough power, the pressure of the tractor on the ground is too small, which will lead to insufficient actual traction of the tractor on the vehicle and the inability to climb the slope. It may also cause the vehicle tires to slip on the ground, which not only fails to achieve normal climbing, but also shortens the service life of the tires.

[0003] In this case, if the overall load-bearing point of the vehicle's axle can be moved backward, the vehicle's load distribution will change, reducing the axle load and increasing the saddle load, thereby increasing the friction between the tractor and the road surface, increasing traction, and thereby improving the vehicle's climbing performance and turning performance, and extending the service life of the tires. Summary of the invention

[0004] In order to overcome the disadvantages of the above technical problems, the present invention provides a frame structure with a liftable axle.

[0005] The vehicle frame structure with a liftable axle of the present invention comprises a vehicle frame and one or more axles arranged under the vehicle frame, the axles are composed of an axle and a leaf spring fixed on the axle, a front suspension and a rear suspension are fixed under the vehicle frame, both of the front suspension and the rear suspension are provided with a suspension inner arc plate, and both ends of the leaf spring are respectively provided in the front suspension and the rear suspension; the characteristic is that: the front suspension and the rear suspension are respectively provided with a front pad and a rear pad, and the front pad and the rear pad are located between the end of the leaf spring and the suspension inner arc plate; the front suspension is provided with a front pad pin shaft for fixing the front pad, and the rear suspension is provided with a rear pad pin shaft for fixing the rear pad.

[0006] The vehicle frame structure with a liftable axle of the present invention is provided with anti-drop bolts on the front suspension and the rear suspension to prevent the leaf spring from falling off when the front pad and the rear pad are present;

[0007] The front suspension and the rear suspension are respectively provided with a front anti-dropout pin shaft and a rear anti-dropout pin shaft to prevent the leaf spring from falling off when the front pad and the rear pad do not exist.

[0008] The vehicle frame structure with a liftable axle of the present invention has the axle connected to the front suspension or the rear suspension via an adjusting tie rod.

[0009] In the vehicle frame structure with a liftable axle of the present invention, the lower surface of the suspension inner arc plate is a convex arc surface, the upper surfaces of the front pad and the rear pad are concave arc surfaces, and the lower surfaces are convex arc surfaces.

[0010] The vehicle frame structure with a liftable axle of the present invention is provided with a lifting air bag, a jack, a lifting oil cylinder and a lifting cylinder for lifting the axle after the front pad and the rear pad are removed.

[0011] The beneficial effects of the present invention are as follows: the frame structure with liftable axles of the present invention respectively arranges front pads and rear pads in the front and rear suspensions of the fixed leaf springs. When the vehicle is running normally, the front and rear pads are located between the ends of the leaf springs and the inner arc plate of the suspension, so that the liftable axle and the other axles are at the same horizontal height, jointly bearing the weight of the carriage and cargo to ensure normal transportation; when the vehicle has insufficient traction on an uphill section, the front and rear pads on one or more axles of the tractor are removed, so that the axle is lifted up and no longer bears weight, so that the load point of the axle is moved backward, the axle load is reduced, the saddle load is increased, the pressure of the tractor on the ground is increased, and the traction is increased, so that the climbing performance of the vehicle is increased and tire slippage is avoided; at the same time, when the front axle is lifted, the turning performance of the vehicle is also increased and the service life of the tire is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the frame structure of the vehicle with a liftable axle of the present invention;

[0013] Figure 2 It is a schematic structural diagram of the axle-liftable frame structure of the present invention after the axle is lifted;

[0014] Figure 3 A three-dimensional diagram of a vehicle frame structure with a liftable axle according to the present invention;

[0015] Figure 4 It is a schematic structural diagram of a vehicle frame structure with a liftable axle according to the present invention using a lifting airbag;

[0016] Figure 5 It is a schematic structural diagram of a vehicle frame structure with a liftable axle according to the present invention using a jack;

[0017] Figure 6 It is a schematic structural diagram of a vehicle frame structure with a liftable axle according to the present invention using a lift cylinder;

[0018] Figure 7 The present invention is a schematic structural diagram of a vehicle frame structure with a liftable axle using a lift cylinder.

[0019] In the figure: 1 frame, 2 axle, 3 front suspension, 4 rear suspension, 5 leaf spring, 6 suspension inner arc plate, 7 front pad, 8 rear pad, 9 front pad pin, 10 rear pad pin, 11 anti-drop bolt, 12 front anti-drop pin, 13 rear anti-drop pin, 14 adjustment rod, 15 third suspension, 16 fourth suspension, 17 lifting airbag, 18 jack, 19 lifting cylinder, 20 lifting cylinder. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1 and Figure 3 As shown, the front view and stereogram of the vehicle frame structure with a liftable axle of the present invention are respectively given. The vehicle frame structure with a liftable axle shown is composed of a vehicle frame 1 and one or more axles arranged below the vehicle frame 1. The axle is composed of an axle 2 and a leaf spring 5 fixed on the axle 2. A front suspension 3 and a rear suspension 4 supporting the axle are fixed below the vehicle frame 1. A suspension inner arc plate 6 is arranged in the front suspension 3 and the rear suspension 4. A front pad 7 is arranged in the front suspension 3, and a rear pad 8 is arranged in the rear suspension 4. The front pad 7 and the rear pad 8 are located between the end of the leaf spring 5 and the suspension inner arc plate 6. Two front pad pins 9 for fixing the front pad 7 are arranged on the front suspension 3, and two rear pad pins 10 for fixing the rear pad 8 are arranged on the rear suspension 4.

[0022] Anti-dropout bolts 11 and front anti-dropout pins 12 are respectively provided below and above the front suspension 3, and anti-dropout bolts 11 and rear anti-dropout pins 13 are respectively provided below and above the rear suspension 4. When the vehicle is in a normal driving state, the front pad 7 is fixed to the front suspension 3 via the front pad pin 9, and the rear pad 8 is fixed to the rear suspension 4 via the rear pad pin 10. The two ends of the leaf spring 5 are respectively located below the front pad 7 and the rear pad 8. The anti-dropout bolts 11 are located below the ends of the leaf spring 5 to prevent the leaf spring 5 from falling off during the driving of the vehicle.

[0023] The lower surface of the suspension inner arc plate 6 is a convex arc shape, and the upper surfaces of the front pad 7 and the rear pad 8 are concave arc shapes to achieve a close fit with the suspension inner arc plate 6. The lower surfaces of the front pad 7 and the rear pad 8 are concave arc shapes to achieve a fit with the end of the leaf spring 5. The axle 2 shown is connected to the front suspension 3 or the rear suspension 4 via the adjustment rod 14, and the orientation of the axle 2 can be adjusted via the adjustment rod 14.

[0024] like Figure 2As shown, a schematic diagram of the structure of the axle-liftable frame structure of the present invention after the axle is lifted is given. When the vehicle is traveling on an uphill section and the traction is insufficient and slipping occurs, the front pad pin shaft 9 on the front suspension 3 is removed, the rear pad pin shaft 10 on the rear suspension 4 is removed, and the front pad 7 and the rear pad 8 are removed (they can be removed by knocking). After the front pad 7 and the rear pad 8 are removed, the two ends of the leaf spring 5 are in contact with the inner arc plate 6 of the suspension, so that the height of the axle 2 can be raised. The lifted axle 2 no longer bears weight, so that the load-bearing part of the axle moves backward, reducing the axle load and increasing the saddle load. The pressure of the tractor on the ground increases, thereby increasing the traction, increasing the climbing performance of the vehicle, avoiding tire slippage, and extending the service life of the tire. At the same time, the turning radius of the vehicle is reduced, so that its turning performance is improved.

[0025] The vehicle adopting the frame structure with liftable axles may be a single-axle vehicle, a double-axle vehicle or a triple-axle vehicle, and the lifting thereof may be one-axle lifting, two-axle lifting or three-axle lifting.

[0026] After the front pad 7 and the rear pad 8 are removed, the corresponding axle cannot be lifted up due to the axle 2, the leaf spring 5 and the weight of the wheel itself. In order to increase the height of the axle 2, an air bag, a jack, a cylinder or a gas cylinder can be set on the frame to actually lift the axle. Figure 4 As shown, a schematic diagram of the structure of the vehicle frame structure with a liftable axle using a lifting airbag is given, Figure 5 As shown, a schematic diagram of the structure of the vehicle frame structure with a liftable axle according to the present invention using a jack is given, such as Figure 6 As shown, a schematic diagram of the structure of the vehicle frame structure with a liftable axle of the present invention using a lift cylinder is given, such as Figure 7 As shown, a schematic structural diagram of a vehicle frame structure with a liftable axle according to the present invention using a lift cylinder is given.

Claims

1. A vehicle frame structure with a liftable axle, comprising a vehicle frame (1) and one or more axles arranged below the vehicle frame, the axles comprising an axle (2) and a leaf spring (5) fixed on the axle, a front suspension (3) and a rear suspension (4) fixed below the vehicle frame, a suspension inner arc plate (6) being arranged in the front suspension and the rear suspension, and two ends of the leaf spring being arranged in the front suspension and the rear suspension respectively; the characteristics are: The front suspension (3) and the rear suspension (4) are respectively provided with a front pad (7) and a rear pad (8), and the front pad and the rear pad are located between the end of the leaf spring (5) and the inner arc plate (6) of the suspension; the front suspension is provided with a front pad pin (9) for fixing the front pad (7), and the rear suspension is provided with a rear pad pin (10) for fixing the rear pad (8); The vehicle frame (1) is provided with a lifting airbag (17) or a jack (18) or a lifting oil cylinder (19) or a lifting cylinder (20) for lifting the axle (2) after the front pad (7) and the rear pad (8) are removed.

2. The vehicle frame structure with a liftable axle according to claim 1, characterized in that: The front suspension (3) and the rear suspension (4) are both provided with anti-drop bolts (11) for preventing the leaf spring (5) from falling off when the front pad (7) and the rear pad (8) are present; The front suspension (3) and the rear suspension (4) are respectively provided with a front anti-dropout pin shaft (12) and a rear anti-dropout pin shaft (13) for preventing the leaf spring (5) from falling off when the front pad (7) and the rear pad (8) are not present.

3. The frame structure with a liftable axle according to claim 1 or 2, characterized in that: The axle (2) is connected to the front suspension (3) or the rear suspension (4) via an adjustment tie rod (14).

4. The vehicle frame structure with a liftable axle according to claim 1 or 2, characterized in that: The lower surface of the hanging inner arc plate (6) is a downward convex arc surface, and the upper surfaces of the front pad (7) and the rear pad (8) are downward concave arc surfaces, and the lower surfaces are downward convex arc surfaces.

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