JP3990120B2 - Air suspension structure for low floor bus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air suspension structure for a low floor bus.
[0002]
[Prior art]
In general, in large sightseeing buses, etc., where the floor surface is raised to improve the view, there is no problem that the tire house is placed under the floor and the tire house protrudes greatly indoors. However, in recent route buses and the like, the floor floor is actively promoted from the viewpoint of improving passengers' getting on and off, so the left and right tire houses on the front side may overhang indoors. Inevitable.
[0003]
FIG. 3 is a plan view showing the interior of the front side of the low-floor route bus as described above. In FIG. 3, 1 is a bus body, 2 is a front side tire house, and each tire house 2 is shown in FIG. A passage portion 3 having a lower floor surface is formed between the two, and this passage portion 3 is a tread of step 5 of the entrance / exit 4 on the left side in the vehicle width direction (lower side in FIG. 3). On the other hand, it is formed with a small level difference that does not make it difficult to get on and off, or without a level difference, and extends in the vehicle width direction (vertical direction in FIG. 3) in the front-rear direction (horizontal direction in FIG. 3). ing.
[0004]
A driver's seat 6 on which the driver is seated is provided at the foremost portion on the right side in the vehicle width direction (upper side in FIG. 3), and a charge is charged when a passenger gets off near the left side of the driver's seat 6. There is a price box 7 to pay.
[0005]
In FIG. 3, reference numeral 8 denotes a foldable opening / closing door provided at the entrance / exit 4, and 9 denotes a seat attached to the upper portion of the tire house 2.
[0006]
Further, the underfloor structure of FIG. 3 is as shown in FIG. 4 and supports the front and rear portions of the tire house 2 with respect to a pair of side rails 10 extending in the front-rear direction as a chassis frame of the bus body 1 in the vehicle width direction. Extending cross members 11 and 12 are connected, and between the side surface portion of the tire house 2 and the tire 13 in the tire house 2, a direction parallel to the side rail 10 is supported near the top of the tire house 2. An arch support 14 having a chevron shape is arranged, and both end portions of the arch support 14 are connected to the pair of front and rear cross members 11 and 12, respectively.
[0007]
An air spring 17 is interposed between the arch support 14 and the front axle 15 and raised from the front axle 15 side by a bracket 16 so that the arch support 14 is supported by the air spring 17. It is elastically supported from the front axle 15 side.
[0008]
[Problems to be solved by the invention]
However, in such a conventional structure, the width of the passage portion 3 (W in FIGS. 3 and 4) is remarkably narrow between the front end portion of the tire house 2 on the entrance / exit 4 side and the charge box 7, and the vehicle passes through. In particular, in the case of a medium-sized route bus, the width of the bus body 1 is reduced, but the tire house 2 is not reduced at the same ratio. Therefore, the tire house 2 on the entrance / exit 4 side. The tendency that the width of the passage portion 3 becomes narrower between the front end portion of the car and the charge box 7 appears more strongly.
[0009]
Even if the front end portion of the tire house 2 on the entrance / exit 4 side is withdrawn outward in the vehicle width direction to increase the width between the charge box 7 and the connecting portion of the arch support 14 to the front cross member 11 and the tire. Since interference with the front end portion of the house 2 occurs, there is a situation that simply changing the shape of the front end portion of the tire house 2 on the entrance / exit 4 side cannot cope with it.
[0010]
The present invention has been made in view of the above-described circumstances, and an object thereof is to improve the passage of a passage portion from the entrance to the indoor side.
[0011]
[Means for Solving the Problems]
The present invention is an air suspension structure for a low floor bus that is installed between front and rear cross members in a tire house and elastically supports an arch support that supports the tire house from an axle side by an air spring. The arch support in the tire house is obliquely connected to the front and rear cross members so as to protrude outward in the vehicle width direction toward the front of the vehicle, and the front end of the tire house is retracted outward in the vehicle width direction . It is characterized by this.
[0012]
Thus, since the connecting portion of the arch support with respect to the front cross member in the tire house moves outward in the vehicle width direction in this way, it is possible to avoid interference with the connecting portion. The front end portion of the tire house in the vicinity of the entrance / exit can be formed by retracting outward in the vehicle width direction.
[0013]
When connecting the arch support diagonally to the front and rear cross members, if the arch support is arranged obliquely around the support position by the conventional air spring, the process from the axle side to the air spring is considered. It is possible to cover all the parts in between with conventional products.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0015]
FIG. 1 and FIG. 2 show an example of an embodiment for carrying out the present invention, and portions denoted by the same reference numerals as those in FIGS. 3 to 5 represent the same items.
[0016]
Regarding the air suspension structure of a low-floor route bus (low-floor bus) configured in substantially the same manner as in FIGS. 4 and 5 described above, in the present embodiment, the left and right tire houses 2 on the front side (the right tire house in the figure) are shown. The arch support 14 in the inner side of the front and rear cross members 11 and 12 is inclined so as to protrude outward in the vehicle width direction (lower side in FIG. 1) toward the front of the vehicle (left side in FIG. 1). It is designed to be connected.
[0017]
Here, when the arch support 14 is connected obliquely, the arch support 14 is arranged obliquely around the support position while maintaining the support position by the conventional air spring 17.
[0018]
Since the connecting position of the arch support 14 with respect to the front cross member 11 is moved outward in the vehicle width direction by such an inclined arrangement of the arch support 14, the tire house is moved to a position where the interference with the connecting position does not occur. The front end portion of 2 is retracted outwardly in the vehicle width direction.
[0019]
Thus, by doing this, the front end of the tire house 2 on the entrance / exit 4 side is moved by shifting the connecting portion of the arch support 14 to the front cross member 11 in the tire house 2 outward in the vehicle width direction. Since it can be formed by retracting outward in the vehicle width direction, the width (W in FIG. 1) of the passage portion 3 between the front end portion of the tire house 2 and the charge box 7 can be expanded. The passage of the passage portion 3 from the mouth 4 to the indoor side can be greatly improved.
[0020]
Here, for the purpose of improving the passability of the passage portion 3 from the entrance / exit 4 to the indoor side, the arch support 14 may be inclined and arranged only for the right tire house 2 near the entrance / exit 4. However, as described in the present embodiment, when the arch support 14 is inclined symmetrically with respect to both the left and right tire houses 2, it is practically possible to easily evaluate the strength of the arch support 14 and its surrounding structure. There are benefits.
[0021]
Further, when the arch support 14 is obliquely connected to the front and rear cross members 11 and 12, the front axle 15 is considered if the arch support 14 is disposed obliquely around the support position by the conventional air spring 17. Since all the parts from the side to the air spring 17 can be covered with conventional products, the cost required to improve the passage of the passage 3 from the entrance / exit 4 to the indoor side is minimized. Can be suppressed.
[0022]
Note that the air suspension structure of the low floor bus of the present invention is not limited to the above-described embodiment, and can be applied to a low floor bus other than a route bus, and does not depart from the gist of the present invention. Of course, various changes can be made within the range.
[0023]
【The invention's effect】
According to the air suspension structure of the low floor bus of the present invention described above, the front end portion of the tire house in the vicinity of the entrance / exit can be formed by retracting outward in the vehicle width direction. It is possible to expand the width of the passage portion near the front end portion of the tire house by suppressing overhanging to the tire house, thereby greatly improving the passage of the passage portion from the entrance to the indoor side. Various excellent effects can be achieved.
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of an embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
FIG. 3 is a plan view showing the situation of a front side room in a conventional low-floor route bus.
4 is a plan view showing the underfloor structure of FIG. 3; FIG.
FIG. 5 is a view taken in the direction of arrows VV in FIG. 4;
[Explanation of symbols]
2 Tire house 3 Passage 4 Entrance / exit 5 Step 7 Price box 11 Cross member 12 Cross member 13 Tire 14 Arch support 15 Front axle (axle)
17 Air Spring

Claims (1)

In a low floor bus air suspension structure in which an arch support that is supported between the front and rear cross members in a tire house and supports the tire house is elastically supported by an air spring from the axle side, the tire house is located at least near the entrance / exit The inner arch support is obliquely connected to the front and rear cross members so as to project outward in the vehicle width direction toward the front of the vehicle, and the front end of the tire house is retracted outward in the vehicle width. Air suspension structure for low floor bus.

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