JP2007253830A - Coupling structure of axle housing and side frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coupling structure of an axle housing and a side frame of a vehicle which improves assembling workability of a V rod by facilitating the assembling work of a mounting part on the frame side of the V rod erected between the side frame of a vehicle body and the axle housing into a bracket on the side frame side. <P>SOLUTION: The coupling structure is provided with the V rod which is enlarged in a V shape, and is engaged with movement in a width direction of the vehicle between the side frame side and the axle housing side through the V rod. The mounting part on the frame side is provided with an outer cylindrical part fixed to an end of the V rod, an axle member with its center part swingably held by the outer cylindrical part, and a bracket comprising a V rod support part having a mounting surface on the V rod side to which a mounting flange part with mounting bolts inserted into both sides of the axle member is fixed and a base part which is continuously formed outside the V rod support part and is mounted on the side frame. A notch part 53 is formed in the base part 51 of the bracket by cutting a part facing an outermost part in a width direction of the vehicle of the mounting flange part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is applied to a suspension device or the like of a vehicle provided with an air spring, and a base portion is attached to the axle housing between the axle housing and the side frame, and both end portions are attached to the side frame, and the outer side from the base portion. An axle housing for a vehicle configured to be provided with a V-rod expanded in a V-shape, and to stop the movement in the vehicle width direction between the side frame side and the axle housing side via the V-rod; It relates to a connecting structure with a side frame.

In a large truck, an air suspension device using an air spring is usually mounted on a suspension device for a front axle and a rear axle.
In a vehicle equipped with such an air suspension device, for flexible support by an air spring, a radius rod that locks the swing in the vehicle longitudinal direction between the body frame side and the axle side (axle side), the swing in the vehicle width direction And a stabilizer for locking the rolling of the vehicle.

  Among these, as for V rod which latches the shaking of a vehicle width direction, as shown, for example in patent documents 1 (Unexamined-Japanese-Patent No. 10-324124), a base is attached to an axle housing and constitutes an axle side attaching part. In addition, both end portions are attached to a pair of left and right side frames to form a frame side attachment portion, and are formed to be expanded outwardly from the base portion in a V shape, the attachment flange portion of the frame side attachment portion, One of the mounting bolts to the mounting surface of the frame is constituted by a stud.

  That is, in the technique of Patent Document 1, a structure in which an axle side end portion of a V rod formed to expand in a V shape is fixed to an axle case with bolts, and then both end portions are fixed to a pair of left and right side frames. Therefore, it is necessary to support a heavy V rod when the frame side mounting portion of the V rod is applied to the vehicle body side bracket when the frame side mounting portion is bolted. Is used as a stud, and the weight of the V rod side end is supported by the stud, thereby preventing the V rod from falling and facilitating the mounting work of the V rod.

JP-A-10-324124

In the air suspension device equipped with the V rod as described above, in order to increase the lateral locking effect of the V rod by increasing the component in the vehicle width direction of the force acting on the V rod due to the rolling of the vehicle, It is necessary to increase the opening angle of the V rod.
However, in the connecting structure of the axle housing having the V rod and the side frame as shown in Patent Document 1, when the opening angle of the V rod is increased as described above, the inner surface of the side frame is Tightening the bolts on the side frame side by narrowing the space around the bolts located near the side frame at the frame side end of the V rod that is inclined with respect to the inner surface with an opening angle There is a problem that the work is difficult and the assembling workability of the V rod is lowered.

In Patent Document 1, one of the mounting bolts on the frame side mounting portion of the V rod is used as a mounting bolt, and the weight of the V rod side end is supported by the mounting bolt to prevent the V rod from falling. Thus, the V rod mounting operation is facilitated, but such a connection structure does not solve the difficulty of the bolt tightening operation on the side frame as described above.
Moreover, in this prior art, when the frame side mounting portion of the V rod is assembled to the bracket on the side frame side, the studs are erected in advance on the side frame side bracket. At the time of assembling the side end, the stud bolt becomes an obstacle to the positioning adjustment movement of the frame side end, and the assembling workability of the V rod is lowered.
Have such problems.

  Accordingly, in view of the problems of the prior art, the present invention facilitates the work of assembling the V-rod mounting portion of the V rod, which is installed between the side frame of the vehicle body and the axle housing, to the side frame side bracket. It is an object of the present invention to provide a connection structure between an axle housing and a side frame of a vehicle that improves the assembly workability of a rod.

  The present invention achieves such an object, and a base portion is attached to the axle housing between an axle housing that accommodates an axle and a pair of left and right side frames that extend in the vehicle front-rear direction. In addition, both end portions are attached to the pair of left and right side frames to constitute a frame side attachment portion, and a V rod that is expanded outwardly from the base portion in a V shape is provided, and the V rod is interposed through the V rod. In the connecting structure of the axle housing and the side frame of the vehicle that locks the movement in the vehicle width direction between the side frame side and the axle housing side, the frame side mounting portion is fixed to the end portion of the V rod. A cylindrical outer tube portion, a shaft member that has a central portion slidably held by the outer tube portion, and a mounting flange in which mounting bolts are inserted into both side portions of the shaft member And a V rod support portion having a V rod side mounting surface that is formed at right angles to the V rod axis and to which the mounting flange portion is fixed via the mounting bolt, and is connected to the outside of the V rod support portion. And a bracket made of a base portion attached to the inner side surface of the side frame in the vehicle width direction. The base portion of the bracket is cut out at a portion facing the outermost portion in the vehicle width direction of the mounting flange portion. Thus, a notch is formed (claim 1).

According to this invention, when assembling the V rod to the left and right side frames, after attaching the base portion of the bracket to the inner side surface in the vehicle width direction of the left and right side frames, the V rod of the V rod support portion of the bracket When the mounting flange portion at the end of the V rod is brought close to the side mounting surface, and the mounting surface and the joint surface of the flange portion and the holes for mounting bolts (through holes and screw holes) are assembled, Since the notch portion is formed in the base portion by notching the portion of the mounting flange portion that faces the outermost portion in the vehicle width direction, the movement in the vehicle width direction of the V rod side end provided with the front mounting flange portion It is possible to increase the amount only in the notch portion forming portion.
As a result, the degree of freedom in assembling the V rod side end to the bracket fixed to the side frame is increased, and the assembly workability of the V rod can be satisfactorily maintained even when the opening angle of the V rod is increased.

In addition to such an invention, preferably, a notch portion is formed by notching a portion of the cylindrical outer cylinder portion which is an outer portion in the vehicle width direction and facing the V rod support portion of the bracket. .
If comprised in this way, when attaching the attachment flange part by the side of a V rod to the V rod support part of a bracket, it cuts into the vehicle width direction outer side part of the cylindrical outer cylinder part fixed to the edge part of a V rod. By forming the portion, it is possible to prevent the outer portion in the vehicle width direction of the outer cylinder portion that is difficult to enter the operator's field of view from interfering with the V rod support portion of the bracket, and assembling the V rod side member and the bracket side member Workability is improved.

Further, in addition to the invention, preferably, the frame side attachment portion is provided with an elastic body between an inner surface of the cylindrical outer cylinder portion and an outer surface of a central portion of the attachment flange portion, and the elasticity The body is baked on the outer surface of the central part of the shaft member, and the outer cylinder part and the mounting flange part are joined via the elastic body (Claim 3).
If comprised in this way, since the shaft member fixed to the bracket of the side frame side attachment part and the outer cylinder part fixed to the V rod end part were connected via the elastic body, the V rod side end When attaching the part to the bracket of the side frame side attachment part, since the elastic body portion has a deformability, the connection between the bracket side and the V rod side end is easily performed without generating an excessive force. be able to.

In addition to this invention, preferably, an alignment mark for alignment with the end surface of the mounting flange portion is formed on the V rod side mounting surface of the bracket.
With this configuration, when fixing the mounting flange portion of the V rod end to the bracket of the side frame side mounting portion with a bolt, the V rod end is attached to the alignment mark engraved on the V rod side mounting surface of the bracket. By aligning the end faces of the mounting flanges of the two parts, both can be easily positioned and the assembly workability is improved.

  According to the present invention, after attaching the base portion of the bracket to the inner side surface of the left and right side frames in the vehicle width direction, the mounting flange portion of the V rod end portion approaches the V rod side mounting surface of the V rod support portion of the bracket. When the V rod side mounting surface and the joint surface of the mounting flange portion and the mounting bolt hole are assembled together, the portion facing the outermost portion in the vehicle width direction of the mounting flange portion is assembled to the base portion of the bracket. Since the notch is formed by notching, the amount of movement in the vehicle width direction of the V rod side end where the mounting flange is provided can be increased only in the notch portion forming portion, which is fixed to the side frame. Assembling workability of the V rod can be maintained well even when the V rod side end to the bracket is increased and the opening angle of the V rod is increased.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

FIG. 1 is a plan view of the main part of an air suspension device for a rear axle in a rear single-shaft heavy truck according to an embodiment of the present invention, and FIG. 2 is a side view of the main part of the air suspension device (as viewed from the arrow A in FIG. 1). It is.
In the air suspension apparatus shown in FIGS. 1 and 2, 1 is a pair of left and right side frames, 2 is a cross member laid between the side frames 1 and 1 in the vehicle width direction, and 3 is an axle housing. Reference numeral 7 denotes an air spring for supporting the axle housing 3 side to the side frame 1 side, and is attached to the front and rear, left and right of the axle housing 3 via two support beams 10. 12 is a shock absorber and 14 is an air tank.

A radius rod 11 has one end fixed to the side frame 1 via a hanger 13 and the other end fixed to the axle housing 3 to lock the vehicle in the longitudinal direction. A stabilizer rod 8 has one end fixed to the side frame 1 and the other end fixed to the axle housing 3 via a stabilizer bar 9 to lock the rolling of the vehicle.
Reference numeral 4 denotes a V rod which is an object of the present invention, and a base portion is attached to the axle housing 3 between the axle housing 3 and the pair of left and right side frames 1 and 1 to constitute an axle side attachment portion 6. Both end portions are attached to the pair of left and right side frames 1 and 1 to constitute a frame side attachment portion 5, and are provided so as to be expanded outwardly from the axle side attachment portion 6 (base portion) in a V shape. It is intended to lock the direction swing.

3 is an enlarged view of a Z portion in FIG. 1 showing a connection structure between the side frame side bracket and the V rod frame side mounting portion in the embodiment of the present invention, FIG. 4 is a view as viewed from the arrow Y in FIG. 3, and FIG. 3 is a cross-sectional view taken along line BB in FIG.
3 to 5, the frame side attachment portion 5 of the V rod 4 includes a cylindrical outer cylinder 42 fixed to the end of the V rod 4 and a central portion that can swing around the outer cylinder 42. The shaft member 41 to be held, the mounting flange portion 41a in which the bolt holes 44 into which the mounting bolts 43z are inserted are formed on both side portions of the shaft member 41, and the shaft center 4z of the V rod 4 are formed at right angles. A V rod support portion 52 having a V rod side mounting surface 52b to which a mounting flange portion 41a is fixed via the mounting bolt 43 (54 in FIG. 4 is a screw hole for the mounting bolt 43z) and the V rod support portion 52. And a bracket 50 formed of a base portion 51 that is connected to the vehicle lateral direction inner side surface 1a of the side frame 1 via a mounting bolt 52c.

  FIG. 5 shows a frame side end structure of the V rod 4, the outer surface of the central portion of the shaft member 41 is formed in a substantially spherical shape, the inner surface of the cylindrical outer cylinder 42, and the outer surface of the central portion of the shaft member 41. A rubber 43 (which may be an elastic body such as rubber) is interposed between the outer cylinder 42 and the shaft of the V rod 4 by baking the rubber 43 on the outer surface of the central portion of the shaft member 41. The member 41 is connected to the rubber 43 through the rubber 43. 45 and 45 are support pieces that form a pair for preventing the rubber 43 from coming off. One side is a collar portion 42b formed on the inner circumference of the outer cylinder 42 and the other side is a snap ring 46. It is retaining.

  By adopting such a frame side end structure, a rubber 43 is provided between the shaft member 41 side fixed to the bracket 50 of the side frame 1 side mounting portion and the outer cylinder 42 fixed to the V rod 4 end portion. When the V rod 4 side end is attached to the bracket 50 of the side frame 1 side attachment portion, the rubber 43 portion has a deformability, so that the bracket 50 side and the V rod 4 side end are attached. The coupling with the part can be easily performed without generating an excessive force.

  As shown in FIGS. 4 and 3, the base portion 51 of the bracket 50 faces the vehicle width direction outermost portion of the mounting flange portion 41 a at the V rod 4 side end, that is, the portion on the side frame 1 side. A portion is cut out to form a cutout portion 53. The notches 53 may be formed on both sides of the base 51 in the vehicle front-rear direction as shown in FIG. 4 or only on one side of the V rod 4 connecting side.

According to this embodiment, when assembling the V rod 4 to the left and right side frames 1, 1, the base portion 51 of the bracket 50 is attached to the mounting bolt 52c on the vehicle lateral direction inner side surface 1a of the left and right side frames 1, 1. Then, the mounting flange portion 41a at the end of the V rod 4 is brought close to the V rod side mounting surface 52 of the V rod 4 support portion of the bracket 50, and the mounting surface 52 and the mounting flange portion 41a are joined. When assembling both the surface and the hole 54 (through hole and screw hole) of the mounting bolt 43z, the base portion 51 of the bracket 50 has a portion facing the outermost portion in the vehicle width direction of the mounting flange portion 41a. Since the notch 53 is formed by notching, the amount of movement in the vehicle width direction of the V rod 4 side end provided with the mounting flange 41a is determined as the notch. It may take only larger part of the section 53.
As a result, the degree of freedom in assembling the end of the V rod 4 on the bracket 50 fixed to the side frame 1 is increased, and the assembly workability of the V rod 4 is good even when the opening angle of the V rod 4 is increased. Can be retained.

As shown in FIG. 3, the mounting form of the V rod support portion 52 of the bracket 50 and the mounting flange portion 41 a at the end of the V rod 4 is fastened to the V rod support portion 52. When worn, approximately half of the outer cylinder 42 is inserted into a recessed portion 52 a formed in the V rod support portion 52.
In the embodiment of the present invention, the cutout portion 42a is formed by cutting out the portion of the cylindrical outer cylinder 42 in the vehicle width direction that is opposed to the wall surface of the recessed portion 52a of the V rod support portion 52. Forming.
With this configuration, when the mounting flange portion 41 a on the V rod 4 side is assembled to the V rod support portion 52 of the bracket 50, the vehicle of the cylindrical outer cylinder 42 fixed to the end portion of the V rod 4. By forming the notch portion 42a in the outer portion in the width direction, it is possible to prevent the outer portion in the vehicle width direction of the outer cylinder 42 portion that is difficult to enter the operator's view from interfering with the wall surface of the recessed portion 52a of the V rod support portion 52. Thus, the assembly workability of the V rod 4 side member and the bracket 50 side member is improved.

Further, in the embodiment of the present invention, as shown in FIG. 3, the V rod side mounting surface 52b of the bracket 50 is aligned with the side end surface 41b of the mounting flange portion 41a of the V rod 4 end. The alignment mark 63 is engraved.
With this configuration, when the mounting flange portion 41a at the end of the V rod 4 is fixed to the bracket 50 of the frame side mounting portion 5 by the mounting bolt 43, the V rod side mounting surface 52b of the bracket 50 is engraved. By aligning the side end face 41b of the mounting flange portion 41a at the end of the V rod 4 with the alignment mark 63 thus made, both can be easily positioned and the assembly workability of the V rod 4 is improved.

FIG. 6 is a plan view of an essential part of an air suspension device for a rear axle in a rear two-shaft type heavy truck according to another embodiment of the present invention, and FIG. 7 is a view taken in the direction of arrow C in FIG.
In this embodiment, the present invention is applied to a rear two-shaft type large truck having two rear axles, and the frame side mounting portion 5 paired with the cross member 2 connecting portion of the side frame 1 The axle housing 3 is integrally formed in a shape toward the axle side mounting portion 6, and the frame side mounting portion 5 and the axle side mounting portions 6, 6 are connected by the V rods 4, 4. The other structure is the same as that of the Example shown by FIGS. 1-5, and the same member is shown with the same code | symbol.

  According to the present invention, the assembly work of the V rod is improved by facilitating the work of assembling the frame side mounting portion of the V rod installed between the side frame of the vehicle body and the axle housing to the side frame side bracket. A connection structure between the axle housing and the side frame of the vehicle can be provided.

It is a principal part top view of the air suspension apparatus of the rear axle in the rear single-shaft type large truck which concerns on the Example of this invention. It is a principal part side view (A arrow line view of FIG. 1) of the said air suspension apparatus. It is the Z section enlarged view of Drawing 1 showing the connection structure of the side frame side bracket and frame side attaching part of V rod in the above-mentioned example. It is a Y arrow line view of FIG. 3 in the said Example. It is the BB sectional view taken on the line of FIG. 3 in the said Example. It is a principal part top view of the air suspension apparatus of the rear axle in the rear biaxial type large truck which concerns on the other Example of this invention. It is C arrow line view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side frame 2 Cross member 3 Axle housing 4 V rod 5 Frame side attaching part 6 Axle side attaching part 8 Stabilizer rod 11 Radius rod 12 Shock absorber 41 Shaft member 41a Mounting flange part 42 Outer cylinder 42a Notch part 43 Rubber 44 Support piece 43z, 52c Mounting bolt 50 Bracket 51 Base part 52 V rod support part 52a Recessed part 52b V rod side mounting surface 53 Notch part 63 Alignment mark

Claims (4)

  A base portion is attached to the axle housing between the axle housing for housing the axle and a pair of left and right side frames extending in the vehicle front-rear direction to form an axle side attachment portion, and both ends are the pair of left and right sides. A V-rod which is attached to the side frame and constitutes a frame-side attachment portion and is expanded outwardly from the base portion in a V shape is provided between the side frame side and the axle housing side via the V rod. In the connecting structure of a vehicle axle housing and a side frame that locks movement in the vehicle width direction, the frame side mounting portion includes a cylindrical outer tube portion fixed to an end portion of the V rod, and a central portion. A shaft member that is swingably held by the outer cylinder portion, a mounting flange portion through which mounting bolts are inserted on both side portions of the shaft member, and a right angle to the V rod shaft center The V flange support portion having a V rod side mounting surface to which the mounting flange portion is fixed via the mounting bolt, and the V flange support portion are connected to the outside of the V rod support portion to be mounted on the inner side surface of the side frame in the vehicle width direction. And a bracket formed of a base portion, and a notch portion is formed in the base portion of the bracket by notching a portion facing the outermost portion in the vehicle width direction of the mounting flange portion. Connection structure of housing and side frame.   2. The axle housing and side according to claim 1, wherein a cutout portion is formed by cutting out a portion of the cylindrical outer cylinder portion that is on the vehicle width direction outer side and that is opposed to the V rod support portion of the bracket. Connection structure with frame.   The frame-side mounting portion is provided with an elastic body between the inner surface of the cylindrical outer tube portion and the outer surface of the central portion of the mounting flange portion, and the elastic body is baked on the outer surface of the central portion of the shaft member. 2. The structure for connecting an axle housing and a side frame according to claim 1, wherein the outer cylinder portion and the mounting flange portion are coupled via the elastic body.   The connecting structure of an axle housing and a side frame according to claim 1, wherein an alignment mark for alignment with an end surface of the mounting flange portion is formed on the V rod side mounting surface of the bracket.

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