JPH10114208A - Air spring bracket structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify constitution of a support part and reduce size without lowering support rigidity of an air spring. SOLUTION: In air spring bracket structure wherein a bracket 31 to support the upper part of an air spring 23 is fixed on a side member 21, a back plate member 32 is arranged at the periphery, in the longitudinal direction of a vehicle, of the bracket 31 and at the fixing part of the bracket at the side member 21. Rigidity in the longitudinal direction of a vehicle of the bracket 31 is ensured by the back plate member 32 without arranging a large reinforcing member above the bracket 31 and constitution of the support part is simplified without lowering support rigidity of the air spring 23. The weight of the portion of the bracket 31 to support the air spring 23 is reduced, the assembly man-hour is decreased, and an overhang of a fender in a car room is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bracket structure for supporting a vehicle air spring on a chassis frame of a vehicle body.

[0002]

2. Description of the Related Art In a large bus or the like, an axle is suspended and supported on a vehicle body side by an air spring, and the air spring is supported via a bracket on a chassis frame constituting the vehicle body, that is, a pair of side members extending in the longitudinal direction of the vehicle. Have been.

The structure of the front frame of a large bus will be described with reference to FIGS. 4 to 6. FIG. FIG. 4 is a plan view of a frame showing a conventional air spring bracket structure, FIG. 5 is a view taken along a line VV in FIG.
FIG. 6 shows a state viewed from the line VI-VI in FIG.

As shown in FIG. 4, a pair of side members 1 extending in the front-rear direction of the vehicle are provided, and a plurality of cross members 2 extending in the vehicle width direction across the pair of side members 1 are provided. Both ends of the cross member 2 are fixed to the pair of side members 1, respectively. Also, side member 1
Is provided with a suspension device 4 having an air spring 3. On the side member 1 side, a front axle 5 is suspended and supported via a suspension device 4, and a lateral rod cross member 6 is provided adjacent to the front axle 5. Lateral rod cross member 6
Are fixed to a pair of side members 1.

[0005] The air spring bracket structure will be described with reference to FIGS. 4 to 6. In a large-sized bus or the like, the support position of the air spring 3 is largely offset left and right and up and down with respect to the side member 1 at the end of the floor of the passage so as to secure a large space in the passenger compartment. For this reason, the supporting portion of the air spring 3 is sufficiently reinforced.

As shown in the figure, a bracket 7 having a gate shape in a side view is formed on the side member 1 and is formed by a plate surface in the vehicle width direction. The bracket 7 supports an upper portion of the air spring 3. . A front axle 5 is suspended and supported below the air spring 3. A pair of legs 9 of the upper side member 8 is fixed from the side to the lower surface of the side member 1, and the upper portions of the legs 9 are brackets 7.
Are connected by a beam portion 10 that straddles the upper part. Beam 1
At 0, the upper part of the bracket 7 is fixed together with the rib 15.
The vertical input from the air spring 3 applied to the bracket 7 is supported by the upper side member 8 via the beam portion 10. Further, a shock absorber 11 is provided between the beam portion 10 of the upper side member 8 and the front axle 5.

For this reason, in the above-described air spring bracket structure, the upper part of the bracket 7 supporting the upper part of the air spring 3 is fixed to the upper side member 8 straddling the bracket 7, so that the air spring 3 in the vertical direction is The input can be supported by the bracket 7 and the upper side member 8. Therefore, the front axle 5 can be suspended and supported with sufficient support rigidity.

[0008]

However, to reinforce the supporting portion of the air spring 3, a large upper side member 8 composed of a plurality of members of a pair of leg portions 9 and a beam portion 10 is required, and the number of parts is reduced. As the number increases, the structure becomes more complex,
Weight was also increasing. In addition, since the beam portion 10 of the upper side member 8 exists above the bracket 7, the fender 20 projects more into the vehicle interior, and the interior space of the vehicle is sacrificed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air spring bracket structure in which the structure of the support portion is simplified and reduced in size without reducing the support rigidity of the air spring.

[0010]

In order to achieve the above-mentioned object, according to the present invention, an axle is suspended and supported by an air spring, and is constituted by a plate surface substantially in the vehicle width direction to support an upper portion of the air spring. In the air spring bracket structure where the bracket to be fixed to the chassis frame,
A back plate member is provided around the bracket in the vehicle front-rear direction in the fixing portion to the chassis frame, the back plate member being joined to the bracket and the chassis frame and formed of a plate surface substantially in the vehicle front-rear direction. . Accordingly, the rigidity of the bracket in the vehicle front-rear direction is secured by the back plate member having the simple configuration, and the configuration of the support portion can be reduced in size.

Further, according to the present invention, the back plate member has a bent portion which is bent outward in the vehicle width direction, and the bent portion extends from the upper surface of the chassis frame to the side surface outward in the vehicle width direction. It is characterized by being continuously joined. The invention according to claim 3 is characterized in that the bent portion and the outer side surface of the chassis frame in the vehicle width direction are joined by a joining portion inclined in the vehicle front-rear direction. As a result, the rigidity of attaching the back plate member to the chassis frame is improved, and a sufficient margin for joining the back plate member is ensured. In the invention according to claim 4, the bracket and the back plate member are connected by a reinforcing plate that forms a closed cross section in the vehicle width direction in cooperation with the back plate member. Thereby, the support rigidity of the bracket to the chassis frame is further improved.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an air spring bracket according to an embodiment of the present invention applied to a frame structure of a front portion of a large bus; FIG. FIG. 1 is a plan view showing an air spring bracket structure according to an embodiment of the present invention, FIG. 2 is a view taken along line II-II in FIG. 1, and FIG. 3 is a line III-III in FIG. The visual state is shown.

As shown in FIG. 1, a pair of side members 21 is provided as a chassis frame extending in the front-rear direction of the vehicle.
A plurality of cross members 22 extending in the vehicle width direction over a pair of side members 21 are provided. Cross member 2
2 has both ends fixed to a pair of side members 21, respectively. In addition, the side member 21 is the air spring 2
3 and a suspension device 25 including a shock absorber 24 and the like, and is suspended and supported by a front axle 26 as an axle. A lateral rod cross member 27 is provided adjacent to the front axle 26, and both ends of the lateral rod cross member 27 are directly fixed to the pair of side members 21.

Reference numerals 28 in the figure denote wheels provided on the front axle 26, and 29 denotes an outrigger provided to extend outward of the side member 21 in the vehicle width direction.

One end of the lateral rod 30 is supported on one end of the front axle 26 in the vehicle width direction, and the other end of the lateral rod 30 is supported on the other end of the lateral rod cross member 27 in the vehicle width direction. . In other words, the lateral rod 30 extends in the vehicle width direction and the front axle 26
And the lateral rod cross member 27, and the lateral rod 30 regulates the position of the front axle 26 in the vehicle width direction with respect to the lateral rod cross member 27, that is, with respect to the vehicle body side.

The structure of the air spring bracket will be described with reference to FIGS. In the case of a large bus or the like, the support position of the air spring 23 is largely offset left and right and up and down with respect to the side member 21 at the end of the floor of the passage so as to secure a large space in the vehicle interior. For this reason, the support portion of the air spring 23 is sufficiently reinforced.

As shown in the figure, a bracket 31 having a gate shape in a side view is formed on the side member 21 and formed of a plate surface in the vehicle width direction. The bracket 31 supports the upper part of the air spring 23. ing. A front axle 26 is suspended and supported below the air spring 23. A back plate member 32 composed of a plate surface in the vehicle front-rear direction is provided inside the bracket 31 in the vehicle width direction, and an intermediate portion of the back plate member 32 in the front-rear direction is joined to an inner edge of the bracket 31 in the vehicle width direction. ing. The back plate member 32 is also joined to the side member 21, and the back plate member 32 is connected to the side member 21 around the bracket 31 so as to protrude from the bracket 31 in the vehicle front-rear direction.
Thereby, the rigidity of the bracket 31 in the vehicle longitudinal direction is ensured.

As shown in FIG. 3, the back plate member 32 is formed with a bent portion 33 bent outward in the vehicle width direction.
Are continuously abutted and joined from the upper surface of the side member 21 to the outer side surface in the vehicle width direction. FIG.
As shown in FIG. 7, the bent portion 33 and the side surface of the side member 21 on the outside in the vehicle width direction are joined by a joining portion 34 inclined in the vehicle front-rear direction. Accordingly, the joining length of the back plate member 32 to the side member 21 is sufficiently ensured, the mounting rigidity is improved, and the side member 2 of the back plate member 32 is
1 is sufficiently secured.

Further, as shown in FIG.
A reinforcing plate 35 is joined to the side surface of the rear plate member 32 and the back plate member 32.
6 are provided. Front axle 26 and mounting part 3
6, the shock absorber 24 is held, and the side surface of the bracket 31 is formed so as not to interfere with the shock absorber 24. The reinforcing plate 35 joined to the bracket 31 forms a closed cross section in the vehicle width direction in cooperation with the back plate member 32, and the support rigidity of the bracket 31 to the side member 21 is further secured. Further, the reinforcing plate 41 located inside the gate shape of the bracket 31 is joined to the bracket 31 and the back plate member 32, and is closed in the vehicle width direction in cooperation with the back plate member 32 as in the case of the reinforcing plate 35. Because of the cross section, the support rigidity is improved from this point as well.

On the other hand, a reinforcing member 40 extending in the front-rear direction (left-right direction in FIG. 2) of the vehicle is mounted on the top of the bracket 31. The reinforcing member 40 is mounted on the bracket 31 from the top of the bracket 31 to the side surface in the vehicle front-rear direction. Have been. Further, a reinforcing member 37 extending in the vehicle width direction (the left-right direction in FIG. 3) is attached to the top of the bracket 31. For this reason, the top of the bracket 31 on which the air spring 23 is supported is reinforced, and the air spring 23
Can be supported by the bracket 31 with sufficient support rigidity. Further, the reinforcing member 40 extending in the front-rear direction of the vehicle has a shape in which the central portion is high and gradually decreases toward both end sides. For this reason, the bracket 31
The overall height of the vehicle can be reduced, and the amount of protrusion of the fender into the vehicle interior can be minimized.

In the air spring bracket structure described above, the bracket 3 supporting the upper part of the air spring 23
Since the back plate member 32 having a simple structure is attached to the periphery of the bracket 1 and the back plate member 32 is joined to the side member 21, the bracket 31 is supported by the side member 21 in a sufficiently reinforced state. Therefore, the input in the vertical direction of the air spring 23 can be supported by the bracket 31 with sufficient supporting rigidity without providing the upper side member above the bracket 31 and reinforcing the bracket 31 as in the related art. Therefore, the air spring 23 including the reinforcing member
Can be assembled as a sub-assembly in advance as a sub-assembly, and then attached to the side member 21, so that the weight can be significantly reduced and the number of attachment steps can be reduced. Further, the height of the portion of the bracket 31 that supports the air spring 23 can be suppressed, and the amount of protrusion of the fender into the vehicle interior can be reduced.

Also, the back plate member 32 is joined to the side member 21 via the bent portion 33, and the side surface of the side member 21 and the bent portion 33 are joined by the joining portion 34 inclined in the vehicle front-rear direction. Side member 21 of plate member 32
The joint length to the side member 21 of the back plate member 32 is sufficiently ensured while the attachment length to the side member 21 is sufficiently secured and the attachment rigidity is improved.

The side surface of the bracket 31 and the back plate member 3
2 to form a closed cross section between the reinforcing plate 35 and the back plate member 32.
Can be further secured to the side member 21.

Further, a reinforcing member 4 is provided on the top of the bracket 31.
Since the zero and the reinforcing member 37 are attached, the top of the bracket 31 on which the air spring 23 is supported is reinforced, and the input of the air spring 23 in the vertical direction can be supported by the bracket 31 with sufficient support rigidity. Moreover,
Since the reinforcing member 36 has a shape in which the height gradually decreases toward both ends, the amount of protrusion of the fender into the vehicle interior can be minimized.

[0025]

According to the air spring bracket structure of the present invention, the air spring bracket structure, which is formed by a plate surface substantially in the vehicle width direction and supports the upper part of the air spring, is fixed to the chassis frame. Since the back plate member which is joined to the bracket and the chassis frame around the bracket in the vehicle front-rear direction and is constituted by a plate surface substantially in the vehicle front-rear direction is provided,
The rigidity of the bracket in the vehicle longitudinal direction can be ensured by the back plate member having a simple configuration without disposing a large reinforcing member as in the related art. As a result, the configuration of the support portion can be simplified without lowering the support rigidity of the air spring, and it is possible to reduce the weight of the bracket portion that supports the air spring and the number of assembly steps, and It is possible to reduce the extension of the fender into the vehicle interior.

Further, as in the second aspect of the invention, a bent portion is formed on the back plate member so as to bend outward in the vehicle width direction, and the bent portion is continuously joined from the upper surface of the chassis frame to the outer side surface in the vehicle width direction. If the bent portion and the outer side surface of the chassis frame in the vehicle width direction are joined by a joining portion inclined in the vehicle front-rear direction as in the invention of claim 3, the mounting rigidity of the back plate member to the chassis frame is improved. Further, the margin for joining the back plate member is sufficiently ensured. According to the fourth aspect of the present invention, since the bracket and the back plate member are connected by the reinforcing plate forming a closed cross section in the vehicle width direction, the support rigidity of the bracket to the chassis frame can be further improved.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating an air spring bracket structure according to an embodiment of the present invention.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is a diagram along a line III-III in FIG. 2;

FIG. 4 shows a conventional air spring bracket structure.

FIG. 5 is a view taken along line VV in FIG. 4;

FIG. 6 is a view taken along line VI-VI in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Side member 22 Cross member 23 Air spring 24 Shock absorber 25 Suspension device 26 Front axle 27 Lateral rod cross member 28 Wheel 29 Outrigger 30 Lateral rod 31 Bracket 32 Back plate member 33 Bent part 34 Joint part 35 Reinforcement plate 36 Mounting part 37, 40 reinforcing member 41 reinforcing plate

Claims (4)

[Claims] 1. An air spring bracket structure in which an axle is suspended and supported by an air spring and a bracket formed of a plate surface substantially in the vehicle width direction and supporting an upper portion of the air spring is fixed to a chassis frame. An air spring bracket provided with a back plate member joined to the bracket and the chassis frame and formed of a plate surface substantially in the vehicle front-rear direction around the bracket in the vehicle front-rear direction at the fixing portion to the vehicle Construction. 2. The back plate member according to claim 1, wherein the back plate member has a bent portion bent outward in the vehicle width direction, and the bent portion extends continuously from an upper surface of the chassis frame to a side surface outward in the vehicle width direction. An air spring bracket structure characterized by being joined. 3. The air spring racket structure according to claim 2, wherein the bent portion and a lateral side of the chassis frame in the vehicle width direction are joined by a joint inclined in a vehicle longitudinal direction. 4. The bracket according to claim 1, wherein the bracket and the back plate member are formed by a reinforcing plate that forms a closed cross section in the vehicle width direction in cooperation with the back plate member. Air spring bracket structure characterized by being connected.