JP3664424B2 - Front suspension device for low floor bus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a front suspension apparatus for a low floor bus having a rigid axle suspended by an air spring.
[0002]
[Prior art]
For example, as shown in FIGS. 3 and 4, two radius rods 4 are provided on the lower side between the frame F and the rigid axle 10, a V-shaped radius rod 23 is provided on the upper side, and the radius rod 4 A technique that supports the front-rear direction and supports the front-rear direction and the lateral direction with a V-shaped rod 23 is known. Here, reference numeral 26 denotes a frame-side bracket to which a V-shaped radius rod is attached, 27 denotes an axle-side bracket, and 30 denotes a tire.
[0003]
[Problems to be solved by the invention]
However, in the above technique, the V-shaped radius rod 23 is at a high position, and the floor surface of the room cannot be lowered because of this rod.
[0004]
Therefore, an object of the present invention is to provide a front suspension apparatus for a low floor bus having a rod arrangement in which the floor surface is lowered.
[0005]
[Means for Solving the Problems]
According to the present invention, the rigid axle (10) is suspended by the air spring (11), one end is pivotally attached to the frame (1) and the other end is pivotally attached to the rigid axle (10) via brackets (5-8), respectively. In the front suspension apparatus for a low floor bus supported by a plurality of radius rods (3, 4) arranged in the front-rear direction, the radius rods are an upper radius rod (3) and a lower radius rod (4) arranged vertically. Are arranged in pairs on the left and right, and a lateral rod (9) is disposed obliquely between the two lower radius rods (4, 4) arranged in the front-rear direction, and the lateral rod (9) The bracket (6b) supporting one end is formed integrally with the bracket (6a) supporting one end (4a) of the one lower radius rod, and the other end Bracket for supporting (8b) is formed integrally with the bracket (8a) for supporting the other end (4b) of the other of the lower radius rods.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0009]
In the figure, members having the same functions as those of the prior art are denoted by the same reference numerals, and redundant description is omitted.
[0010]
In FIG. 1, a horizontal frame 1 is fixed to a vertical frame (not shown), and a radial rod mounting member 2 is fixed to the horizontal frame 1 via a reinforcing member 2a with reference to FIG. One end 3 a of an upper radius rod 3, which is a radius rod on the upper right side (the upper side in the figure and the left side in the figure is the front side of the vehicle), is fastened to the radius rod mounting member 2 with a bolt 17.
[0011]
The other end 3 b of the upper radius rod 3 is fastened to the rigid axle 10 with a bolt 17 via the bracket 7 and the air suspension bracket 12. The ends of the radius rods 3 and 4 and the later-described lateral rod 9 have a structure in which a shaft having a mounting bolt hole is press-fitted through the rubber 20 into the rod end 19.
[0012]
Further, the left upper radius rod 3 is configured in the same manner as the right side.
[0013]
One end 4 a of the right lower radius rod 4 is attached to the lateral frame 1 via a bracket 6, and the other end 4 b is attached to a bracket 8 a integrally having an attachment portion 8 b for attaching a lateral rod 9 attached to a rigid axle 10. It is attached.
[0014]
Further, one end of the left lower radius rod 4 is attached to the lateral frame 1 via a bracket 6 a integrally having a mounting portion 6 b for attaching the lateral rod 9, and the other end 4 b is attached via the bracket 8 similarly to the upper radius rod 3. Are fastened to the rigid axle 10.
[0015]
Then, one end 9a of the lateral rod 9 is fastened to the mounting portion 6b of the bracket 6a with a bolt 17, and the other end 9b of the lateral rod 9 is fastened to the mounting portion 8b of the bracket 8a with a bolt 17. As described above, the lateral rod 9 has the same structure as the radius rods 3 and 4.
[0016]
The rigid axle 10 is fastened to the air suspension bracket 12 with a bolt 14 via a spacer 13, and the upper portion of the air suspension bracket 12 is attached to the upper suspension bracket 15 via an air spring 11.
[0017]
The operation will be described below.
[0018]
The front axle constituted by the rigid axle 10 is suspended by the left and right air springs 11, and the rigid axle 10 including the air suspension bracket 12 is arranged at the position suspended by the air spring 11 and the radius rods 3, 4 addressed to the upper and lower two. A total of four radius rods are supported by receiving a force in the front-rear direction (indicated by arrows in both directions in the figure).
[0019]
Further, the frame side mounting portion 6b and the axle side mounting portion 8b of the two lower radius rods are obliquely connected by one lateral rod 9, and the frame side mounting portion of the lateral rod 9 is a front frame (not shown). The connection portion between the main frame and the main frame is a strongly reinforced portion, and has sufficient strength and rigidity to receive the lateral force of the rigid axle 10.
[0020]
Further, since the upper radius rod 3 at the position of the conventional V-shaped upper radius rod 23 is arranged in parallel in the front-rear direction, there is also an effect of integrating the bracket of the radius rod and the lateral rod, and the floor surface is about 180 mm to 200 mm or more. Therefore, the ground height can be lowered, so that it is possible to obtain a non-step floor height that can be boarded and exited without providing a step at the entrance / exit.
[0021]
【The invention's effect】
The present invention is configured as described above, the lateral rod can be arranged as a dedicated rod at a low position, the mounting position itself can be further lowered by integrating the bracket of the radius rod and the lateral rod, and a floor where a non-step entrance is possible. Surface height can be realized. Further, the weight can be reduced by integrating the bracket.
[Brief description of the drawings]
FIG. 1 is a plan view of a front suspension apparatus showing an embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a plan view showing an example of conventional technology.
4 is a side view of FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lateral frame 2 ... Radius rod mounting member 2a ... Reinforcement member 3 ... Upper radius rod 4 ... Lower radius rod 5, 6, 7, 8, 6a, 8a ... Bracket 9 ... -Lateral rod 10 ... Rigid axle 11 ... Air spring 12 ... Air suspension bracket 23 ... V-shaped radius rod

Claims (1)

  A rigid axle (10) is suspended by an air spring (11), one end is pivotally attached to the frame (1) and the other end is pivotally attached to the rigid axle (10) via brackets (5 to 8), respectively, and arranged in the front-rear direction. In the front suspension apparatus for a low floor bus supported by the plurality of radius rods (3, 4), the upper radius rod (3) and the lower radius rod (4), which are arranged vertically, are respectively paired on the left and right. A lateral rod (9) is disposed obliquely between two lower radius rods (4, 4) disposed in the front-rear direction, and a bracket (1) supporting one end of the lateral rod (9) 6b) is a bracket formed integrally with a bracket (6a) for supporting one end (4a) of the one lower radius rod and supporting the other end. Preparative (8b) is the other of the lower radius rod on the other end (4b) front suspension apparatus low-floor bus, characterized in that it is formed integrally with the bracket (8a) which supports the.

Images