JPH0591916U - Vehicle air suspension mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] The support beam of the air suspension is abolished to provide a simple and lightweight mounting structure. In an air suspension in which an air spring 4 is interposed between a vehicle body 1 and an axle 2, the axle 2 is sandwiched between a lower surface of an upper bracket 5 and an upper surface of a lower bracket 6, and the upper bracket 5 and the lower bracket are sandwiched. 6 is fixed by a U-shaped bolt 7, a lower rod 11 connected to the vehicle body is connected to the lower bracket 6, and a shock absorber 8 is provided between the lower bracket 6 and the vehicle body.
A spring seat 5a for contacting and supporting the air spring 4 is formed on the upper surface of the upper bracket 5 by being connected to each other by the stabilizer 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle suspension mounting structure using an air spring.

[0002]

[Prior Art]

 In a vehicle that uses an air suspension, the air spring does not have the rigidity to support the horizontal force generated by driving or braking, so a support mechanism for determining the position of the vehicle body and axle is required. As a mechanism, there is known one in which positioning is performed by a support beam as disclosed in "Engineering Chassis" by Nissan Diesel Sales Co., Ltd. (issued in March 1983).

As shown in FIG. 3, a support beam 30 is attached to both ends of a rigid type axle 2 via U-shaped bolts 7, and front and rear spring seats 31 and a vehicle body provided on the support beam 30. An air spring 4 is interposed between the suspension 1 and 1, and the position of the axle 2 in the front-rear direction of the vehicle is determined by the lower rod 11, and the position of the axle 2 in the left-right direction is determined by the upper rod 10. Further, the support beam 30 is provided with a stabilizer arm 32 for ensuring roll rigidity and a shock absorber 8 for damping vibration.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional example, since the spring seat 31, the lower rod 11, the shock absorber 8 and the stabilizer arm 32 supporting the lower end of the air spring 4 are attached to the support beam 30, respectively, the structure of the support beam 30 becomes large and complicated. Not only that, but it also caused the weight to increase.

Therefore, an object of the present invention is to provide a vehicle air suspension mounting structure having a simple and lightweight structure without using a support beam.

[0006]

[Means for Solving the Problems]

 According to the present invention, in an air suspension in which an air spring is interposed between a vehicle body and an axle, the axle is sandwiched between the lower surface of the first bracket and the upper surface of the second bracket, and the first bracket is also provided. And the second bracket are fixed by fastening means, the radius rod connected to the vehicle body is connected to the second bracket, and the second bracket and the vehicle body are further connected by a shock absorber and a stabilizer, respectively. A spring seat that abuts and supports the air spring is formed on the upper surface of the first bracket.

[0007]

[Action]

 Since the spring seat is formed on the upper surface of the first bracket that holds the axle, it is possible to support the air spring without using a support beam, and the second bracket is simple and lightweight because the load of the vehicle body is not applied. It is possible to reduce the weight because it can be configured.

[0008]

【Example】

 In this embodiment, the present invention is applied to a parallel link type air suspension for suspending a rear wheel axle of a bus.

As shown in FIGS. 1 and 2, a rear-type rigid axle 2 having a differential case 3 in a central portion is arranged in a transverse direction of a vehicle body 1, and left and right ends of the axle 2 are respectively formed on the vehicle body. The position of the axle 2 is controlled by a lower rod 11 as a radius rod in the front-back direction of the vehicle body and is supported by the upper rod 10 in the left-right direction. It is a 4-link type.

At the supporting position of the air spring 4, the axle 2 is sandwiched between the upper bracket 5 as a first bracket and the lower bracket 6 as a second bracket, and the upper bracket 5 is formed on the upper surface. The spring seat 5a supports the air spring 4, and the lower surface thereof has an engaging portion 5b for locking the axle 2 in the front-rear direction, and the lower bracket 6 similarly locks the axle 2 in the front-rear direction on the upper surface. An engagement portion 6a is formed, and the upper bracket 5 and the lower bracket 6 are fastened by a pair of U-shaped bolts 7 in front of and behind the axle 2.

The lower bracket 6 has a lower surface to which a lower rod 11 extending freely in the front-rear direction, which is rotatably connected to the vehicle body 1, is rotatably connected. A shock absorber 8 that is attached to dampen vibrations is connected, and a stabilizer 9 formed by a torsion bar spring stretched through a rod 12 in the transverse direction of the vehicle body 1 is connected to the rear end of the lower bracket 6. Therefore, only the vertical displacement of the axle 2 is allowed.

The differential case 3 of the axle 2 is supported by the vehicle body 1 through two upper rods 10 extending in a substantially horizontal direction to restrict lateral displacement of the axle 2, and the position of the axle 2 in the front-rear direction is defined by these. It is determined by the lower rod 11 and the upper rod 10.

With the above-mentioned configuration, the operation will be described.

When the axle 2 vibrates in the vertical direction, the upper rod 10, the lower rod 11, and the stabilizer 9 rotate vertically, and the air spring 4 and the shock absorber 8 expand and contract to dampen the vibration, so that the roll of the vehicle body 1 rolls. However, the stabilizer 9 is twisted to suppress the sinking of the air spring 4.

That is, the load of the axle 2 is supported and the vibration is absorbed by the air spring 4 via the upper bracket 5, and the vibration of the axle 2 is damped and the roll is suppressed via the lower bracket 6. 8 and stabilizer 9.

Therefore, since the spring seat 5a is formed integrally with the upper bracket 5 that locks the axle 2 above, the lower bracket 6 does not support the load of the vehicle body 1 and does not include the lower rod 11, the shock absorber 8, and the stabilizer 9. It is only necessary to secure the space and strength to support, and it is possible to design the lower bracket 6 with a simple shape and lightweight, which can reduce the weight of the vehicle body and at the same time reduce the unsprung weight of the suspension. It is possible to improve the road followability.

[0017]

[Effect of the device]

 As described above, according to the present invention, since the first bracket is provided with the spring seat to support the air spring above the axle, the second bracket does not receive the load of the vehicle body and has a simple shape and is lightweight. It is possible to reduce the weight of the vehicle body and the unsprung weight.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a perspective view of an essential part of FIG.

FIG. 3 is a schematic diagram showing a conventional example.

[Explanation of symbols]

 2 Axle 4 Air spring 5 Upper bracket 5a Spring seat 6 Lower bracket 8 Shock absorber 9 Stabilizer 10 Upper rod 11 Lower rod

Claims (1)

[Scope of utility model registration request] 1. In an air suspension in which an air spring is interposed between a vehicle body and an axle, the axle is sandwiched between the lower surface of the first bracket and the upper surface of the second bracket, and the first bracket and the first bracket are connected to each other. The second bracket is fixed to the second bracket by a fastening means, the radius rod connected to the vehicle body is connected to the second bracket, and the second bracket and the vehicle body are further connected by a shock absorber and a stabilizer, respectively. An air suspension mounting structure for a vehicle, characterized in that a spring seat for contacting and supporting an air spring is formed on the upper surface of the vehicle.