JP2003191707A - Rear axle housing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of parts required for a rear axle housing of a commercial vehicle and to secure compatibilty of a slide seat. <P>SOLUTION: In a trunnion-suspension type rear 2-axle vehicle, a slide seat 8 of a rear axle housing and a side thrust bracket 10 are integrally cast, and the integrally cast article 11 extends over an upper face 14 of a rear axle housing arm part 3, a lower face 17 of the integrally cast article 11 whose upper face 14 is stepped over abuts substantially with the whole surface of the upper face 14, and a flange 12 of the integrally cast article 11 and a shelf part 13 of the rear axle housing arm part 3 are fastened with a shim 15 between them by a bolt 16. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear axle housing in a commercial vehicle, and more particularly to a structure of a slide seat and a side thrust bracket in a rear axle housing integrally cast.

[0002]

SUMMARY OF THE INVENTION The present invention is intended to reduce the number of parts required for a rear axle housing of a commercial vehicle and to ensure compatibility of slide seats mounted on the rear axle housing. is there.

[0003]

For this reason, the rear axle housing according to the present invention is a trunnion suspension type rear two-axle vehicle, and a side thrust bracket that extends upward and regulates the sliding of the end portion of the leaf spring in the vehicle width direction. And a slide sheet with which the lower surface of the leaf spring end portion abuts is placed on the upper surface, and the integrally cast product is detachably bolted to the shelf portion.

That is, the slide seat and the side thrust bracket mounted on the rear axle housing are integrally cast, and the number of parts can be reduced by that much, and at the same time, the integrally cast product of the slide seat and the side thrust bracket is the cast of the rear axle housing. Since the bolts are detachably attached to the shelves, it is possible to easily ensure compatibility of the slide sheet that is easily worn.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention shown in the drawings will be described below.

A rear axle housing 1 of a trunnion suspension type rear two-axle vehicle has a large central diameter portion 2 in which a differential gear (not shown) and the like are housed, and an arm portion extending from the large central diameter portion 2 to the left and right in the vehicle width direction. 3 and 3 are integrally cast from a spheroidal graphite cast iron material (FCD), and an axle tube 4 which is a forged product is connected to the tip of each arm 3 by friction welding.

An annular differential carrier mounting portion 5 is formed on the vehicle front side of the large central diameter portion 2, while an end portion of an upper radius rod (not shown) is connected to an upper portion of the large central diameter portion 2. The pair of brackets 6, 6 is integrally cast with the rear axle housing 1, and at the bottom of each arm 3, a pair of brackets 7, 7 to which the ends of a lower radius rod (not shown) are connected is formed. It is integrally cast with.

Further, the slide seat 8 against which the lower surface of the end of the leaf spring abuts, and the rib 9 extending upward and on the back surface.
And a side thrust bracket 10 for restricting sliding of the end portion of the leaf spring in the vehicle width direction are integrally cast by a cast iron material having particularly high wear resistance,
The vehicle front-rear direction flange 12 of the integrally cast product 11 and the vehicle front-rear direction shelf 13 of the arm portion 3 face each other, that is, in the state where the integrally cast product 11 straddles the upper surface 14 of the arm portion 3, An adjusting shim 1 between the lower surface and the upper surface of the shelf 13.
5, the flange 12 and the shelf 13 by the bolt 16
By tightening and, the lower surface 17 of the integrally cast product 11 straddling the upper surface 14 of the arm portion 3 substantially entirely contacts the upper surface 14 of the arm portion 3.

That is, since the slide seat 8 and the side thrust bracket 10 required for the rear axle housing 1 are integrally cast, the number of parts mounted on the rear axle housing 1 is reduced accordingly, and the rear axle housing 1 is manufactured. The cost can be easily reduced.

Further, since the flange 12 of the integrally cast product 11 is detachably fastened to the shelf 13 of the arm 3 with the bolt 16, the lower surface of the end portion of the leaf spring slides strongly as the vehicle runs. When the upper surface of the slide sheet 8 is worn out, the integrally cast product 11 can be easily replaced with a new one, which is convenient in general and at the same time, the cost of the rear axle housing 1 can be suppressed. .

Moreover, the shim 1 having a proper thickness in the gap between the lower surface of the flange 12 and the upper surface of the shelf 13 which face each other.
When the flange 12 and the shelf 13 are clamped up and down by the bolts 16 when the bolt 5 is clamped, the lower surface 17 of the integrally cast product 11 that straddles the upper surface 14 of the arm 3 is substantially entirely covered with the arm 3. Since it abuts against the upper surface 14 of the vehicle, it is possible to reliably prevent a large stress from being generated in the side thrust bracket base bent portion 18 having a relatively small radius of curvature of the integrally cast product 11 even when the vehicle is turning. It is possible,
As a result, the side thrust bracket 10 can be downsized, and the manufacturing cost of the integrally cast product 11 can be reduced.

[0012]

In the rear axle housing according to the present invention, the slide seat and the side thrust bracket are integrally cast, and the number of parts can be reduced accordingly, so that the manufacturing cost of the rear axle housing 1 can be easily reduced. In addition, the integrally cast product of the slide seat and the side thrust bracket is detachably bolted to the shelf part of the rear axle housing, so that the compatibility of the slide seat, which is easily worn, can be easily ensured. Most convenient.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an embodiment of the present invention.

FIG. 2 is an enlarged view taken along the line II-II in FIG.

FIG. 3 is a perspective view of a main part of the above embodiment.

[Explanation of symbols]

1 Rear axle housing 2 Large center part 3 arms 8 slide sheets 10 Side thrust bracket 11 One-piece casting 12 flange 13 shelves 15 sims 16 volts

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akihiro Kojima             Mitsubishi Motors, 5-3-8 Shiba, Minato-ku, Tokyo             Industry Co., Ltd. (72) Inventor Kimihiko Aoyama             Mitsubishi Motors, 5-3-8 Shiba, Minato-ku, Tokyo             Industry Co., Ltd. (72) Inventor Aki Saito             1 of 547 Horinouchi, Kikugawa-cho, Ogasa-gun, Shizuoka Prefecture             Asahi Tech Co., Ltd. (72) Inventor Takako Segawa             16 580, Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa             Within Ryo Automotive Engineering Co., Ltd.

Claims (2)

[Claims] 1. In a trunnion suspension type rear two-axle vehicle, a slide seat with which a lower surface of a leaf spring end portion abuts, and a side thrust bracket which extends upward to regulate sliding of the leaf spring end portion in the vehicle width direction. The rear axle housing in which the integrally cast product is placed on the upper surface of the arm portion, and the integrally cast product is detachably bolted to the shelf portion of the arm portion. 2. The integrated casting according to claim 1, wherein the integrally cast product straddles the upper surface in the vehicle front-rear direction, and the lower surface of the integrally cast product straddling the upper surface substantially abuts the upper surface,
A shim is sandwiched between the integrally cast product and the shelf,
A rear axle housing in which the integrally cast product is bolted to the shelf.