JP2549488Y2 - Vehicle cross member support device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular cross member supporting device for supporting a cross member to which a suspension is mounted on a side member.

[0002]

2. Description of the Related Art There are various types of vehicle suspensions. For example, in a semi-trailing suspension, it is desirable to attach a trailing arm that supports wheels to the vehicle body at two locations separated in the vehicle width direction. Therefore, the trailing arm is attached to the side member via the cross member.

[0003] Both ends of the cross member are supported by respective side members. First and second support portions are formed on each side member and are separated from each other. Further, first and second supported portions facing the first and second support portions are formed at both ends of the cross member, respectively. Both ends of the cross member are supported by the respective side members via support devices.

A conventional supporting device comprises first and second cylindrical members and the like disposed between first and second supporting portions of a side member and first and second supported portions of a cross member. Have been. Each of the first and second cylindrical bodies is attached to the first and second support portions, and is provided with an inner cylinder extending substantially along the up-down direction, and disposed around the inner cylinder. 2 comprises an outer cylinder fitted to the supported portion, a tubular elastic member interposed between the inner cylinder and the outer cylinder, and connecting the inner cylinder and the outer cylinder.

Each of the first and second cylindrical elastic members absorbs vibration transmitted from the cross member to each side member. Therefore, it becomes difficult for the vibration of the suspension to be transmitted to the vehicle body side, and the discomfort of the occupant can be reduced.

[0006]

The running stability of the vehicle can be improved by increasing the rigidity of the suspension in the vehicle width direction. Further, in order to improve the riding comfort of the vehicle, the rigidity of the suspension in the vehicle longitudinal direction may be reduced to some extent. Since the suspension is attached to the cross member, the rigidity of the suspension in the same direction increases if the cross member is not easily displaced in the vehicle width direction. The rigidity in the same direction decreases.

However, in the above-described conventional cross member support device, when the rigidity of each of the first and second cylindrical elastic members is set to be large, the cross member is moved in the vehicle width direction and the vehicle front-back direction. It is difficult to displace in both directions,
In addition, when the rigidity of each tubular elastic member is set to be small, the cross member is likely to be displaced in both the vehicle width direction and the vehicle front-rear direction. In other words, there is a problem that the ease (mounting rigidity) of displacement of the cross member in the vehicle width direction and the vehicle front-rear direction cannot be adjusted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a cross member support device capable of adjusting the mounting rigidity of the cross member in the vehicle longitudinal direction and the vehicle width direction. With the goal.

[0009]

According to the present invention, there is provided a cross member for mounting a suspension device at first and second support positions spaced apart in a vehicle longitudinal direction from a side member of a vehicle body. Supporting a vehicle cross member having first and second support units for supporting a member
In the device , each support unit is provided with a side member and a lock.
Coupled to one of Rosumenba, the inner tube extending along a substantially vertical direction, is disposed around the inner cylinder, the side members
An outer cylinder and connected to the other of the cross member, a cylindrical elastic member for connecting the inner cylinder and the outer cylinder is interposed between the inner cylinder and the outer cylinder, are formed on the cylindrical elastic member, said Tube
And a gap portion for reducing the horizontal stiffness of the Jo elastic member, and, the air <br/> gap portion in the first and second supporting units, a request to the vehicle longitudinal direction and vehicle width direction of the cross member depending on the support rigidity that is, as viewed in the circumferential direction of the cylindrical elastic member
The positions are different from each other .

[0010]

The first and second support units are cylindrical elastic members.
The support rigidity of the cross member differs at the position of the
Ri, thereby their respective exert a supporting rigidity required in the vehicle longitudinal direction and the vehicle width direction of the cross member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. 1 and 2 show an embodiment of a support device for a vehicle cross member to which the present invention is applied.
Are arranged at both ends of the cross member 3, and both ends of the cross member 3 are supported by the side members 4. The semi-trailing suspension 2 is attached to the cross member 3. The cross member 3
Are arranged symmetrically in the vehicle width direction. For this reason, only one support device 1 will be described, and description of the other support device 1 will be omitted.

At a predetermined position of the side member 4, a front support portion and a rear support portion are formed apart from each other in the vehicle front-rear direction. A bolt insertion hole is formed in each support portion, and a cylindrical member 5, a stopper member 6, and a bracket 7 are provided respectively (only the front support portion is shown in FIG. 3).
The bolt insertion hole is formed in the lower plate of the side member 4. The cylindrical member 5 is fixed to the upper surface of the lower plate, and the stopper member 6 is fixed to the lower surface of the lower plate so as to sandwich the bolt insertion hole from above and below. The bracket 7 has a base end screwed and fixed to a predetermined position on the bottom surface of the lower plate, and a tip end extending below the stopper member 6.

At the end of the cross member 3, brackets 8, 9 extending toward the front and rear of the vehicle, respectively, are provided.
Is fixed. The bracket 8 extends between the stopper member 6 of the front support portion and the bracket 7.
A casing 10 is provided at the tip of the bracket 8.
Is fixed. The casing 10 has a cylindrical shape with an upper end closed, and a hole 10 a through which a bolt 18 and an inner cylinder 12 described later are inserted is formed in the center of the closed surface. The bracket 9 extends between the stopper member of the rear support portion and the bracket, and has a front end provided with a casing 10 similar to the casing 10 described above.
Is fixed.

The support device 1 includes first and second support units.
And the first and second cylindrical bodies 11 and 21 as the first and second cylindrical bodies. The first cylindrical body 11 is interposed between the front support portion of the side member 4 and the bracket 8 of the cross member 3. The first cylindrical body 11 includes an inner cylinder 12, an outer cylinder 13,
It is more constructed cylindrical elastic member 14 and the gap portion 15, 15. The inner cylinder 12 has both ends in contact with the stopper member 6 and the bracket 7, and is arranged along the up-down direction. A bolt 18 is press-fitted into the inner cylinder 12. The tip of the bolt 18 is screwed and fixed to the cylindrical member 5 via the stopper member 6 and the above-described bolt insertion hole.
To the front support portion of the side member 4 so as not to rotate.

The outer cylinder 13 is arranged concentrically around the inner cylinder 12, and has a flange 13c formed at the lower end edge. The outer cylinder 13 is composed of a pair of cylinder halves 13A and 13B that surround the inner cylinder 12 in cooperation with each other. Each of the cylinder halves 13A and 13B has a shape in which a cylindrical member is divided in half along the axial direction. The outer cylinder 13 is pressed into the casing 10 at the tip of the bracket 8 from below.

The cylindrical elastic member 14 includes the inner cylinder 12 and the outer cylinder 13.
It is interposed between them. The outer peripheral edge of the lower end surface of the cylindrical elastic member 14 extends downward along the flange 13c of the outer cylinder 13. This extended portion serves as a buffer member for the bracket 7. The inner peripheral edge of the upper end surface of the cylindrical elastic member 14 extends a predetermined portion upward along the inner cylinder 12. The inner peripheral surface and the outer peripheral surface of the cylindrical elastic member 14 are adhered to the outer peripheral surface of the inner cylinder 12 and the inner peripheral surface of the outer cylinder 13, respectively, so that they cannot be rotated relative to each other.

The cylindrical elastic member 14 has a pair of gaps 15 and 15 and a pair of inserts 16 and 16. As shown in FIG. 3, each gap 15 penetrates the cylindrical elastic member 14 from the upper end to the other end. Further, the gaps 15 are formed on both sides of the axis of the tubular elastic member 14 so as to be arranged in the first direction indicated by the solid line A in FIG. The first direction is a direction included in the horizontal plane, and is set, for example, in the vehicle front-rear direction. Therefore, the gap 15 reduces the rigidity of the tubular elastic member 14 in the vehicle longitudinal direction.

Each of the insert fittings 16 is arranged on both sides of the axis of the tubular elastic member 14 in a direction orthogonal to the first direction in a horizontal plane, that is, in the vehicle width direction. In addition, this cylindrical elastic member 14 is provided with each cylindrical half 13 of the outer cylinder 13.
A and 13B are divided into two parts. That is, the cylindrical elastic member 14 is divided into two along the first direction,
Pressing of the outer cylinder 13 into the casing 10 is facilitated.

FIG. 4 shows a cross section of the first cylindrical body 11 along the line IV-IV in FIG. 2, and as described above, the peripheral wall of the cylindrical elastic member 14 in the vehicle longitudinal direction and the vehicle width direction. Has changed in thickness. Therefore, the rigidity of the tubular body 11 in the vehicle longitudinal direction and the vehicle width direction changes. When the tubular body 11 is pressed into the casing 10 and the horizontal direction of the tubular member 11 is changed, the first direction is changed, and accordingly, the direction in which the rigidity of the tubular body 11 decreases is changed.

The second tubular body 21 is interposed between the rear support of the side member 4 and the bracket 9 of the cross member 3. The second cylindrical body 21 includes an inner cylinder 22 and an outer cylinder 2.
3. It is composed of a tubular elastic member 24 and gaps 25, 25 and the like. Inner cylinder 22 and outer cylinder 23 of second cylindrical body 21
Are configured similarly to the inner cylinder 12 and the outer cylinder 13 of the first cylindrical body 11. Therefore, the inner cylinder 22 and the outer cylinder 23
Is omitted.

The cylindrical elastic member 24 of the second cylindrical body 21 is
Similarly to the cylindrical elastic member 14 of the first cylindrical body 11, the inner cylinder 2
It is interposed between the outer cylinder 2 and the outer cylinder 23 and is adhered to them so that relative rotation is impossible. A pair of gaps 25, 25 penetrating the tubular elastic member 24 from the upper end to the other end are formed on both sides of the axis of the tubular elastic member 24 so as to be arranged in the second direction indicated by a solid line B in FIG. Have been. The second direction is a direction included in the horizontal plane, for example, the front side is inclined at a predetermined angle inward in the vehicle width direction with respect to the vehicle front-rear direction.
Therefore, each gap 25 reduces the rigidity of the cylindrical elastic member 24 in the second direction.

The cylindrical elastic member 24 is provided with a pair of insert fittings 26 on both sides of the axis, which are arranged in a direction perpendicular to the second direction in the horizontal plane.
The cylindrical elastic member 24 is also divided into two parts along the second direction, in other words, corresponding to each of the cylindrical half bodies 23A and 23B of the outer cylinder 23, similarly to the cylindrical elastic member 14. This facilitates the press-fitting of the outer cylinder 23 into the casing 10 of the bracket 9.

The cylindrical body 21 changes the thickness of the peripheral wall of the cylindrical elastic member 24 to reduce the rigidity in the second direction. When the cylindrical body 21 is pressed into the casing 10 and the horizontal direction of the cylindrical body 21 is changed, the second direction changes in the horizontal direction, and therefore, the direction in which the rigidity of the cylindrical body 21 decreases is changed. change. Hereinafter, the operation will be described.

The support device 1 sets the first direction of the first cylindrical body 11 to the front-rear direction of the vehicle and sets the second cylindrical body 2
The front side in the first second direction is inclined inward in the vehicle width direction by a predetermined angle with respect to the vehicle front-rear direction. Therefore, the rigidity of the first tubular body 11 decreases in the vehicle longitudinal direction, and the rigidity of the second tubular body 21 decreases in the direction inclined by a predetermined angle with respect to the vehicle longitudinal direction. Thereby, the cross member 3
The mounting rigidity in the vehicle front-rear direction and the vehicle width direction is suitable for the riding comfort and running stability of the vehicle.

When the first direction is changed in the horizontal direction, the direction in which the rigidity of the first cylindrical body 11 decreases is changed. Also,
When the second direction is changed in the horizontal direction, the second cylindrical body 2
The direction in which the stiffness decreases is changed. Therefore, the supporting device 1
When the end of the cross member 3 is supported on the side member 4 by changing the first and second directions, the mounting rigidity of the cross member 3 in the vehicle longitudinal direction and the vehicle width direction is adjusted.

In this embodiment, the first and the second
The voids 15, 25 of the tubular bodies 11, 21 are formed on both sides of the axis of each of the tubular elastic members 14, 15, but the invention is not limited to this, and only one side may be provided. Further, in the present embodiment, the gaps 15 and 25 of the first and second tubular bodies 11 and 21 are configured to penetrate from the upper end to the lower end of each of the tubular elastic members 14 and 15; Each void 1
It is not necessary to penetrate 5, 25.

[0027]

[Effects of the Invention] As described above, according to the present invention,
Since the support device for the vehicle cross member is configured as described above, the first and second support units have the cylindrical bullet.
By changing the circumferential position of the void in the body,
The second support unit can exhibit the required support rigidity of the cross member in the vehicle front-rear direction and the vehicle width direction , respectively , and thus can improve both the riding comfort and running stability of the vehicle. effective.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a vehicle cross member to which a support device according to the present invention is applied.

FIG. 2 is a cross-sectional view showing an embodiment of a vehicle cross member support device to which the present invention is applied.

FIG. 3 is a longitudinal sectional view of a first cylindrical body 11 shown in FIG.

4 is a first cylindrical body 1 taken along a line IV-IV shown in FIG.
1 is a sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Supporting device 3 Cross member 4 Side member 11, 21 Cylindrical body 12, 22, Inner cylinder 13, 23 Outer cylinder 14, 24 Cylindrical elastic member 15, 25 Void A A 1st direction B 2nd direction

Claims (1)

(57) [Scope of request for utility model registration] [Claim 1] A vehicle body side member by the first and second support position spaced apart in the longitudinal direction of the vehicle, the cross for a vehicle comprising a first and a second support unit for supporting the cross member suspension device is attached Member support device
, Each of the support units is connected to one of the side member and the cross member.
Is, inner cylinder extending along a substantially vertical direction, is disposed around the inner cylinder, the side members and the click
An outer cylinder which is connected to the other Rosumenba, a cylindrical elastic member for connecting the inner cylinder and the outer cylinder is interposed between the inner tube and the outer tube, is formed on the cylindrical elastic member, said cylindrical and a sky gap portion Ru reduce the water <br/> horizontal direction of the rigidity of the elastic member, the gap portion in the first and second support unit,
Required in the vehicle longitudinal direction and vehicle width direction of the cross member
According to the supporting stiffness, when viewed in the circumferential direction of the tubular elastic member,
A cross-member support device for a vehicle, wherein the cross-member support device is positioned at a different position .