JPH11291939A - Cross member structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items and the number of assembling processes by integrally casting the cross member of a chassis frame and a torque rod bracket for connecting the end part of a torque rod through a support means by means of castings. SOLUTION: A cross member 9 has a web 19, flanges 20, 21 and side plates 22 in the same manner as a conventional one, and a torque rod bracket 10 also has a truncated conical protruding part 15 in the same manner as a conventional one. However, the base end part side of the truncated conical protruding part 15 of the torque rod bracket 10 is integrally connected to the web 19 of the cross member 9 by casting. The torque rod brackets 10 are formed on both vehicle longitudinal sides of the web 19 of the cross member 9, and two are formed laterally in the vehicle width direction D2 with a bush mounting space 25 in the center part of the vehicle width direction D2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross member structure for a chassis frame of a vehicle.

[0002]

2. Description of the Related Art In a trunnion type suspension for a rear two-axle vehicle, an axle and a chassis frame are used to prevent excessive rotation due to drive torque and control torque of the rear axle and to suppress axle tramping and windup. The connection is performed by a torque rod, and the trunnion suspension of the rear two-axle equipped with the torque rod is shown in FIG.

In FIG. 8, reference numeral 1 denotes a trunnion bracket attached to the lower surface of a chassis frame 2, 3 denotes a trunnion shaft pivotally supported by the trunnion bracket 1, and 4 denotes a trunnion shaft 3 with the lower surface in the center in the vehicle longitudinal direction D1. The leaf springs are supported by the front and rear ends of the vehicle in the vehicle front-rear direction D1 and supported on different axles 5, respectively.

A chassis frame 2 connects the differential case 7 of the two axles 5 and the trunnion bracket 1 to each other.
, A torque rod 8 disposed below the differential case 7 of each axle 5 and a cross member 9 of the chassis frame 2.
The torque rod is disposed above the torque rod 6 so as to connect the torque rod brackets 10 attached to both sides of the vehicle in the vehicle longitudinal direction D1.

The details of the connection between the torque rod 8 and the torque rod bracket 10 attached to the cross member 9 are shown in FIGS.
This is shown in FIG.

Thus, the torque rod 8 is supported and fixed to the torque rod bracket 10 via the support hardware 12 by attaching the bush 11 to the tip.

As shown in FIG. 5, the torque rod bracket 10 is formed with a bush mounting portion 14 at the center of the bracket body 13 in the vehicle width direction D2. A trapezoidal protruding portion 15 protruding in the direction D1 is provided.

[0008] Horizontal tip 16 of each trapezoidal projection 15
Are provided with bolt holes 17 for fixing the support hardware.
8 are drilled.

On the other hand, details of the cross member 9 of the chassis frame 2 are shown in FIGS. Thus, the cross member 9 is arranged such that the plate thickness direction is the vehicle front-rear direction D1 and extends in the vehicle width direction D2, and is welded to the upper and lower ends of the web 19 so that the plate thickness direction is the vertical direction. Flanges 20 and 21 and side plates 22 fixed by welding on both sides of the web 19 in the vehicle width direction D2 so that the plate thickness direction becomes the vehicle width direction D2. Bolt hole 2 for mounting bracket 10
A bolt hole 26 for mounting a torque rod is formed on the same axis as the bolt hole 17 for fixing the supporting hardware 3 and the supporting hardware.

[0010]

Conventionally, a cross member 9 is provided.
The torque rod bracket 10 and the torque rod bracket 10 are separate parts.
0 must be bolted to the cross member 9 in advance.

For this reason, in the case of the conventional cross member structure, the number of parts is increased and the number of assembling steps is increased. As a result, there is a problem that the cost is increased.

The present invention has been made in view of the above circumstances, and has as its object to provide a cross member structure capable of reducing the number of parts and the number of assembling steps, thereby reducing costs.

[0013]

The cross member structure of the present invention is obtained by integrally casting a cross member of a chassis frame and a torque rod bracket to which an end of a torque rod is connected via a support means by using a casting. It is.

Therefore, according to the present invention, the number of parts and the number of assembly steps can be reduced, and the cost can be reduced.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of the present invention. The cross member 9 and the torque rod bracket 10 are integrally cast using ductile cast iron, and a cross member structure 24 is formed.

The cross member 9 has a web 19, flanges 20, 21 and side plates 22 as in the conventional one, and the torque rod bracket 10 also has a trapezoidal projection 15 as in the conventional one, The rod bracket 10 is formed such that the base end side of the trapezoidal projection 15 is
9 are integrally connected by casting.

The torque rod brackets 10 are formed on both sides of the web 19 of the cross member 9 in the vehicle longitudinal direction D1. Two torque rod brackets 10 are formed in the vehicle width direction D2 at the center of the vehicle width direction D2 with a bush mounting space 25 therebetween. When the torque rod 8 is connected to the torque rod bracket 10, the tip of the bush 11 of the torque rod 8 shown in FIGS.
And is sandwiched between the left and right trapezoidal protrusions 15. In the drawing, reference numeral 16 denotes a horizontal tip at the tip of the trapezoidal projection 15, reference numeral 17 denotes a bolt hole for fixing the support hardware formed so that the axis extends in the vehicle front-rear direction D1 at the horizontal tip 16, and reference numeral 26 denotes the support hardware fixation. It is a bolt hole for mounting a torque rod which is on the same axis as the bolt hole 17 for use.

According to the cross member structure 24 in the embodiment of the present invention, since the cross member 9 and the torque rod bracket 10 are integrally cast using ductile cast iron, the number of parts and the number of assembling steps are reduced. Since the bracket main body 13 (see FIG. 5) required for the torque rod bracket 10 is unnecessary, the weight can be reduced. Therefore, in the cross member structure 24 according to the present embodiment, it is possible to reduce costs.

In the embodiment of the present invention, the case where ductile cast iron is used has been described.
Any cast steel can be used.
It goes without saying that various changes can be made without departing from the spirit of the present invention.

[0021]

According to the cross member structure of the present invention, since the cross member and the torque rod bracket are integrally cast using cast iron, the number of parts and the number of assembly steps can be reduced, and as a result, the cost can be reduced. Various excellent effects can be achieved.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of a cross member structure of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a front view of a conventional example showing a state in which a torque rod bracket is bolted to a cross member.

4 is a view in the direction of arrows IV-IV in FIG. 3;

FIG. 5 is a perspective view of the torque rod bracket and the torque rod shown in FIGS. 3 and 4;

FIG. 6 is a front view of the cross member shown in FIGS. 3 and 4;

7 is a view in the direction of arrows VII-VII in FIG. 6;

FIG. 8 is a side view of a trunnion type suspension of the rear two-axle vehicle.

[Explanation of symbols]

 2 chassis frame 8 torque rod 9 cross member 10 torque rod bracket 12 support hardware (support means) 24 cross member structure

Claims (1)

[Claims] 1. A cross member structure wherein a cross member of a chassis frame and a torque rod bracket to which an end of a torque rod is connected via support means are integrally cast using a casting.