JP2653305B2 - Axle housing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle housing used for a vehicle such as a forklift, and more particularly to a connection structure between a housing end and a differential housing.

[0002]

2. Description of the Related Art As shown in FIGS. 5 and 6, a front axle housing for mounting a front wheel of a forklift has a housing end 8 for mounting a wheel (not shown) and housing ends 8 mounted on both ends. Differential housing 9. The differential housing 9 has a built-in differential gear for rotating left and right wheels. Left and right end portions 92 of the differential housing 9
The base 81 of the housing end 8 is fixed to the housing end 8 by welding 7.

An axle bracket 85 is fitted around the outer periphery of the housing end 8. The housing end 8 and the axle bracket 85 are fixed by welding 7. The brake assembly 4 is attached to the axle bracket 85 by bolts 83. The bolt 83 is screwed into a bolt hole 853 of the axle bracket 85. Further, the lower end of the axle bracket 85 fixes the axle bracket 85 to the frame 43 by inserting a bolt into the bolt hole 851. In FIG. 5, reference numeral 45 denotes a mast support.

[0004]

The conventional axle housing employs a structure in which the housing end 8, the differential housing 9 and the axle bracket 85 are integrally fixed to each other by welding 7. Therefore, as a material for these components, weldable cast steel is used. However, cast steel is expensive. on the other hand,
Inexpensive materials such as cast iron may be used to construct these parts, but cast iron is difficult to weld. Further, if the above parts are integrally welded and fixed, maintenance work of these parts is very difficult.

[0005] As described above, when welding, the centering and dimensional alignment of each part are accurately maintained.
It is necessary to perform welding work, which makes assembly work difficult. In addition, welding may cause welding distortion. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and aims to provide an axle housing that can use inexpensive materials, facilitates assembly work and maintenance work between components, and does not cause welding distortion. It is.

[0006]

The present invention provides an axle housing in which a housing end is connected to both ends of a differential housing and an axle bracket is fitted around the outer periphery of the housing end. The axle housing is characterized in that the flange portion is sandwiched between the axle bracket and the differential housing, and the axle bracket and the differential housing are fixed to each other by a connecting member.

The most remarkable point of the present invention is that a protruding flange is provided on the outer periphery of the housing end, and that the flange is clamped by an axle bracket and a differential housing, and both are fixed by a connecting member. It is in. The brim portion is formed in an annular shape on the entire circumference or a part of the outer circumference of the housing end (see FIG. 2). The flange is provided at a boundary between the axle bracket and the differential housing so as to be sandwiched between the two. In this pinching, a step portion for preventing the collar portion from coming off is provided on the axle bracket side (FIGS. 1 to 3) or the differential housing side (FIG. 4). Further, the axle bracket and the differential housing may be provided with the above-mentioned steps, respectively, so that the collar part is sandwiched between them.

Further, the axle bracket and the differential housing are fixed by a connecting tool such as a bolt. At this time, the coupling tool can also tighten the brake assembly together with the axle bracket. Further, as the material of the housing end, the differential housing, and the axle bracket, an inexpensive material such as cast iron can be used.

[0009]

In the present invention, the flange provided at the housing end is sandwiched between the axle bracket and the differential housing, and the axle bracket and the differential housing are fixed by a connecting member. Therefore, the housing end, the differential housing, and the axle bracket do not need to be connected by welding as in the related art. And
Since welding is not performed, it is not necessary to use expensive cast steel as a material of each component, and the axle housing is inexpensive.

[0010] Further, since welding is not performed, no welding distortion occurs. In addition, even if the material is difficult to weld, such as cast iron, any material can be used regardless of this, and the degree of design freedom from the material side is improved. Furthermore, since welding is not performed, assembly work between components and maintenance work of the axle housing become easy. Therefore, according to the present invention, it is possible to provide an axle housing in which inexpensive materials can be used, the work of assembling the parts and the above-mentioned maintenance work are easy, and no welding distortion occurs.

[0011]

【Example】

Embodiment 1 An axle housing according to an embodiment of the present invention will be described with reference to FIGS. This example relates to a front axle housing of a forklift. In the axle housing of this embodiment, a housing end 1 is connected to both ends of a differential housing 2 and an axle bracket 3 is fitted around the housing end 1.
A projected flange 11 is provided on the outer periphery of the housing end 1, and the flange 11 is sandwiched between the axle bracket 3 and the differential housing 2. Also,
The axle bracket 3 and the differential housing 2 are fixed to each other by bolts 38 as connecting members.

As shown in FIGS. 1 and 2, the housing end 1 has a front end portion 12 for mounting a wheel and a base end portion 13 for connection to the differential housing 2. The outer periphery of the housing end 1 has a ring-shaped protruding collar portion 11 at a position outside the flange 22 of the differential housing 2 (on the housing end side). On the other hand, the differential housing 2 has a main body 20 and cylindrical connecting portions 21 provided at both ends thereof, and a flange 22 for mounting the axle bracket 3 at a tip of the cylindrical connecting portion 21.

As shown in FIGS. 1 and 3, the axle bracket 3 includes a ring-shaped main body portion 31 for fitting the housing end 1 and a plate portion 35 provided continuously below the main body portion. The main body part 31 has a fitting hole 32 for inserting and fitting the tip part 12 of the housing end 1. The fitting hole 32 has a flange 1 of the housing end 1.
1 has a stepped portion 321 to be engaged. Further, the main body 31 has a bolt hole 311 for connection with the differential housing 2. On the other hand, the plate portion 35 has bolt holes 35 for connecting the axle bracket 3 to the frame 43.
One. The housing end 1, the differential housing 2 and the axle bracket 3 are all made of cast iron.

Next, when assembling the above components, the base end 13 of the housing end 1 is inserted into the cylindrical connecting portion 21 of the differential housing 2. Then, the flange 11 of the housing end 1 is brought into contact with the end face of the flange 22 of the differential housing 2. On the other hand, housing end 1
The body 3 of the axle bracket 3
One fitting hole 32 is fitted, and the step 321 of the fitting hole is engaged with the collar 11 (FIGS. 2 and 3). Thereafter, as shown in FIG. 1, a bolt 38 is screwed into the bolt hole 311 of the axle bracket 3 and the flange 22 of the differential housing 2 to fix them. In addition, this allows the collar portion 11
Is held between the flange 22 of the differential housing 2 and the step 321 of the axle bracket 3. When the bolt 38 is screwed, the bracket 41 of the brake assembly 4 is fastened to the axle bracket 3 together. Other configurations are the same as those of the conventional example.

Next, the function and effect will be described. In the axle housing of the present embodiment, the housing end 1 has its base end 13 inserted into the cylindrical connecting portion 21 of the differential housing 1, and the flange of the housing end 1 is sandwiched between the axle bracket 3 and the differential housing 2. , Bolt 38
It is fixed by.

Therefore, it is not necessary to connect these parts by welding as in the conventional case. Since welding is not performed, it is not necessary to use expensive cast steel as a material of each component, and cast iron is used. Therefore, the cost of the axle housing is low. In addition, since welding is not performed, assembly work between components and maintenance work of the axle housing become easy. There is no welding distortion.

Embodiment 2 In this embodiment, as shown in FIG. 4, the flange 11 of the housing end 1 is engaged with the step 221 provided on the flange 22 of the differential housing 2 in the embodiment 1, and the axle bracket is used. 3 is sandwiched. That is, a step portion 221 is provided at the end of the flange portion 22, and the flange 11 of the housing end 1 is fitted into this portion. Others are the same as the first embodiment. In this embodiment, the same effect as in the first embodiment can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of an axle housing according to a first embodiment.

FIG. 2 is an enlarged view of a main part of a housing end according to the first embodiment.

FIG. 3 is a perspective view of the axle bracket according to the first embodiment.

FIG. 4 is an essential part cross-sectional view of an axle housing according to a second embodiment.

FIG. 5 is a cross-sectional view of an axle housing according to a conventional example.

FIG. 6 is a perspective view of an axle housing according to a conventional example.

[Explanation of symbols]

 1. . . Housing end, 11. . . Collar part, 2. . . Differential housing, 21. . . Tubular connection, 22. . . Flange, 3. . . Axle bracket, 32. . . Fitting hole, 321. . . Step, 4. . . Brake assembly,

Claims (1)

(57) [Claims] 1. An axle housing in which a housing end is connected to both ends of a differential housing and an axle bracket is fitted on the outer periphery of the housing end, and a projected flange portion is provided on the outer periphery of the housing end. An axle housing characterized in that a collar portion is sandwiched between the axle bracket and the differential housing, and the axle bracket and the differential housing are fixed to each other by a connecting tool.