JPH09207506A - Axle housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an axle housing capable of obtaining high strength and a high function by a simple structure and reducing a cost by decreasing a number of part items. SOLUTION: In an axle housing 1 constituted by connecting mutually at least center housing parts 2, 3 and a pair of right/left tube housing parts 4, 5, an end part in a side of the center housing parts 2, 3 of a pair of the right/ left tube housing parts 4, 5 is extended and enlarging-molded in shape of a differential gear storage part 6 of the center housing parts 2, 3, enlarging-molded extension parts 10, 11 of the tube housing parts 4, 5 are connected to be superposed in each other to the center housing parts 2, 3.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an axle housing for a four-wheel vehicle.

[0002]

2. Description of the Related Art Generally, an axle housing applied to a drive axle of a rigid axle type suspension for an automobile includes, for example, those shown in FIGS.
The axle housing 51 has a pair of upper and lower center housing portions 52 and 53, a pair of left and right tube housing portions 54 and 55, a backing tube 56, and the like, and these members are joined to each other by welding. Then, the differential gear 58 is arranged in the differential housing portion 57 of the center housing portions 52, 53, the axle shaft (not shown) is inserted in the tube housing portions 54, 55, and the center housing portions 52, 53 are The differential oil 59 has been added.

[0003]

However, in the above-described conventional axle housing 51, since the joint portion between the center housing portions 52 and 53 and the tube housing portions 54 and 55 is a stress concentration portion, the reinforcing member 60 is used. It was necessary to secure the strength by using it. Further, in the conventional axle housing 51, the differential oil 59 flows out from the vicinity of the differential gear 58 due to the lateral acceleration while the vehicle is traveling, the inclination of the road surface, etc. Therefore, the oil deflector plate 61 and the oil deflector 62 are required to prevent this. . Therefore, in the conventional axle housing 51, since it is necessary to use many parts, there is a risk that the number of parts increases and the cost increases.

Meanwhile, the oil deflector plate 61 is used.
As shown in FIG. 10, the center housing parts 52, 53
Since it is erected in the differential storage portion 57, the outflow of the differential oil 59 to the outside is suppressed by the oil deflector plate 61 as shown by the arrow, but the once-out differential oil 59 is prevented by the oil deflector plate 61. There was a problem that it was difficult to return to the inside of the differential storage portion 57.

The present invention has been made in view of such circumstances, and an object thereof is to obtain high strength and high function with a simple structure and to reduce cost by reducing the number of parts. It is to provide an axle housing capable of

[0006]

In order to solve the above-mentioned problems of the prior art, in the present invention, an axle housing constructed by joining at least a center housing part and a pair of left and right tube housing parts to each other is provided. The center housing portion side ends of the pair of left and right tube housing portions are extended and molded to the differential housing shape of the center housing portion, and the extension portion of the enlarged and molded tube housing portion overlaps with the center housing portion. They are joined together.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

1 to 3 show an embodiment of an axle housing according to the present invention. In the figure, reference numeral 1 is an axle housing for a four-wheeled vehicle according to the present embodiment, and the axle housing 1 includes a pair of upper and lower center housing portions 2 and 3 having a two-divided structure, and the center housing portions 2 and 3. It is provided with a pair of left and right tube housing portions 4 and 5 arranged at both left and right ends, and is configured by joining the center housing portions 2 and 3 and the tube housing portions 4 and 5 to each other by welding.

The center housing portions 2 and 3 are front semi-arcuate members which are arranged to face each other. By disposing the center housing portions 2 and 3 in the vertical direction, the differential housing portion is arranged. 6 is axle housing 1
It is designed to be formed inside. A differential gear 7 is rotatably arranged in the differential storage portion 6 and differential oil 8 is filled therein.
In FIG. 1, 9 is a cover.

On the other hand, the tube housing parts 4, 5
Is a tubular body into which an axle shaft (not shown) can be inserted.
At the end portion located on the side, extension portions 10 and 11 extending toward the inside of the differential storage portion 6 are provided along the axial direction. Moreover, the extension portions 10 and 11 are enlarged and formed to correspond to the shape of the differential housing portion 6 of the center housing portions 2 and 3, and the extension portions 10 and 11 are enlarged and formed.
Is configured to be joined by welding in a state of being overlapped with the center housing portions 2 and 3 except the lower end. Therefore, the axle housing 1 has the center housing portion 2, which serves as a stress concentration portion.
The joint portion between 3 and the tube housing portions 4 and 5 has a double structure over a wide range.

Further, the lower portions of the extension portions 10 and 11 of the tube housing portions 4 and 5 are provided at the center housing portion 2 and
3, and part of the tube housing parts 4, 5 are configured as baffle plates 10a, 11a. These baffle plates 10a, 1
Reference numeral 1a denotes a lateral wall which is arranged at a predetermined height from the bottom surface of the center housing part 3, and the diff oil 8 remains in the diff storage part 6 even when a lateral acceleration load is applied while the vehicle is traveling or when the road surface is inclined. It is supposed to do. That is, the baffle plates 10 a and 11 a suppress the outflow of the differential oil 8 from the differential storage portion 6, and at the same time, the differential oil 8 that has flowed out sideways is easily returned to the vicinity of the differential gear 7.

Further, a recess 1 extending along the width direction is formed on the upper surface of the extension 10 of the one tube housing portion 4.
2 is formed, and this recess 12 is a breather plug 1
It is arranged corresponding to 3. Therefore, the mounting portion of the breather plug 13 is covered by the recess 12 of the extension portion 10 so that the oil splash can be prevented from flowing out from the breather plug 13.

As a method of manufacturing the tube housing portions 4 and 5, it is conceivable to expand or swage the end portion of the pipe material, cut it after hydraulic bulging, and weld a pressed product (upper and lower divided).

In the axle housing 1 of this embodiment, the center housing portion 2 which is a stress concentrating portion is formed by forming the extension portions 10 and 11 having a special shape on the center housing portions 2 and 3 of the tube housing portions 4 and 5, respectively. , 3 and the tube housing parts 4, 5 have a double structure in a wide range, the reinforcing member which is required in the conventional axle housing is not necessary. Also, the lower side of the extension portions 10 and 11 are baffle plates 10a and 11a which are horizontal walls arranged at a predetermined height position in place of the conventional vertical wall installation. Since it is configured, the oil deflector required for the conventional axle housing can be eliminated, and a simple structure can be obtained. Moreover, as shown by the arrow in FIG. The differential oil 8 flowing out to the parts 4 and 5 can be smoothly returned.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes are possible based on the technical idea of the present invention. is there.

For example, the axle housing 21 as shown in FIGS. 4 and 5 includes center housing portions 22 and 23.
The tube housing portions 24 and 25 have a conventional structure, and unlike the above-described embodiment, a reinforcing member 26 of a semi-cylindrical body,
27 is used. Then, these reinforcing members 26, 27
The base end portions 26a, 27a located on the tube housing portions 24, 25 side of the above are joined to the center housing portion 23, and the distal end portions 26b, 27b of the reinforcing members 26, 27 are arranged to project into the center housing portions 22, 23. Then, it is used as a baffle plate for suppressing oil outflow. Therefore, according to this modification, since the reinforcing members 26 and 27 also have a function as a baffle plate, the oil deflector plate used in the conventional axle housing becomes unnecessary.

Also, in the axle housing 31 as shown in FIGS. 6 and 7, the center housing portions 22 and 23 and the tube housing portions 24 and 25 have a conventional structure, as in the above-described modification, and the axle housing 31 has the same structure as the above-described embodiment. Differently, a cylindrical reinforcing member 36 whose center housing portions 22 and 23 are enlarged is used. Then, except for the lower end portion 36a, the reinforcing member 36 is attached to the tube housing portion 25.
Also, it is joined to the center housing portions 22 and 23, and the lower end portion 36a thereof is arranged so as to project into the center housing portions 22 and 23, and is used as a baffle plate for suppressing oil outflow. Further, a recess 37 extending along the width direction is formed on the upper surface of the reinforcing member 36,
The recess 37 is provided corresponding to the breather plug 38, and prevents oil droplets from flowing out from the breather plug 38. Therefore, according to this modification, since the reinforcing member 36 also has a function as a baffle plate or the like, the oil deflector plate and the oil deflector used in the conventional axle housing are unnecessary.

[0018]

As described above, the axle housing according to the present invention is constituted by joining at least the center housing portion and the pair of left and right tube housing portions to each other, and the pair of left and right tube housing portions is provided. Since the end portion on the side of the center housing is extended and molded to the shape of the differential housing portion of the center housing, and the extension portion of the expanded tube housing portion is overlapped and joined to the center housing portion, The housing structure is simpler than that of the conventional axle housing, and the joint portion between the center housing portion and the tube housing portion, which is the stress concentration portion, can be reinforced, so that high strength and high function can be secured. Moreover, in the axle housing of the present invention, since it is not necessary to use a reinforcing member, an oil deflector, or the like, it is possible to reduce costs by reducing the number of parts and the number of assembling steps.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an axle housing according to an embodiment of the present invention.

FIG. 2 is a front view showing the axle housing according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an axle housing according to an embodiment of the present invention in which differential oil is injected into the center housing portion.

FIG. 4 is a sectional view showing an axle housing according to a modified example of the present embodiment.

5 is a perspective view showing a relationship between a center housing portion of the axle housing in FIG. 4 and a reinforcing member.

FIG. 6 is a sectional view showing an axle housing according to another modification of the present embodiment.

7 is a perspective view showing a relationship between a center housing portion of the axle housing in FIG. 6 and a reinforcing member.

FIG. 8 is an exploded perspective view of a conventional axle housing.

FIG. 9 is a front view showing a conventional axle housing.

FIG. 10 is a cross-sectional view showing a conventional axle housing in which differential oil is injected into the center housing portion.

[Explanation of symbols]

 1 Axle housing 2,3 Center housing part 4,5 Tube housing 6 Diff storage part 10,11 Extension part

Claims (2)

[Claims] 1. An axle housing constructed by joining at least a center housing portion and a pair of left and right tube housing portions to each other, wherein the center housing portion side end portions of the pair of left and right tube housing portions are extended to extend the center. An axle housing, wherein the housing portion is enlarged and formed into a differential housing portion shape, and the extension portion of the enlarged and formed tube housing portion is overlapped and joined to the center housing portion. 2. The center housing part has a two-part structure, and an extension part of the end part of the tube housing part on the center housing part side is inserted into the center housing part.
The axle housing according to claim 1, wherein a part of the tube housing portion is configured as a baffle plate.