JPH11291731A - Axle housing mounting structure - Google Patents

Abstract

(57) [Problem] To provide an axle housing mounting structure capable of simplifying welding work and reducing stress concentration at a joint between a spring seat and an axle housing. SOLUTION: A pair of side walls 8A of a spring seat 2 are provided.
Axle housing 1 extending in a direction away from each other
A substantially gutter-shaped flange portion 20 on which the cradle is placed is formed. Since the axle housing 1 is placed on the flange portion 20 and the joint area between the two is increased, concentration of stress on the joint portion can be reduced. By welding the contact portion 16C between the distal end portion of the flange portion 20 and the axle housing 1, a welding work space is widened and workability can be improved. The welding of the contact portion 16C can be performed over the entire region by preventing the contact portion 16C from receiving the interference of the U bolt 3. For this reason, a large welding strength is ensured, and it is not necessary to perform welding on the inner side of the side wall portion 8A required in the related art, and the productivity can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle housing mounting structure used for a vehicle.

[0002]

2. Description of the Related Art FIGS. 6 to 8 show an example of a conventional axle housing mounting structure. 6 and 7, an axle housing 1 (rear axle housing) connecting both left and right wheels (not shown) is a leaf using a spring seat 2, two U-bolts 3, a lower spring seat 4, and a U-bolt regulating member 5. Spring 6
Is joined to.

[0003] As shown in FIG. 8, a spring seat 2 has a rectangular seat body 7 that abuts against a leaf spring 6.
And a wall portion 8 suspended from the peripheral portion of the seat body 7. The long side portion 9 of the seat body 7 extends along the leaf spring 6 (that is, perpendicular to the axle housing 1).
Are located. The dimension of the short side portion 10 of the seat body 7 is set to substantially the same value as the width dimension of the leaf spring 6. A pair of wall portions 8 (wall portions 8 formed on the long side portions 9, which are orthogonal to the axle housing 1) of the wall portions 8 have a substantially trapezoidal shape. A projecting chevron 11 is formed. An arc-shaped notch 12 is formed in the chevron 11 along the axle housing 1, and the axle housing 1 is placed in the notch 12.

The U-bolt restricting member 5 has an arc-shaped restricting member main body 13 having an inner peripheral side along the axle housing 1 and a flange (hereinafter referred to as a restricting member) formed at an end of the restricting member main body 13 so as to protrude outward. The restricting member main body 13 is connected to the lower spring seat 4.
And is placed on the axle housing 1. The lower spring seat 4 is disposed on the opposite side of the leaf spring 6 from the contact surface of the spring seat 2 (the lower side in FIG. 7). The lower spring seat 4 has U
A hole 4a for inserting the leg 3b of the bolt 3 is formed.

[0005] The U-bolt 3 comprises a curved portion 3a and two legs 3b connected to the curved portion 3a, and a male screw 3c is formed at the tip of the leg 3b. The bending portion 3a
It has a shape substantially along the regulating member body 13. The two U-bolts 3 are formed by winding the curved portion 3a around the regulating member main body 13 and inserting the leg portion 3b into the hole 4a of the lower spring seat 4, and the tip of the leg portion 3b protruding from the hole 4a. A nut 15 (see FIG. 3) is screwed into the male screw 3c. In this case, the U-bolt 3 is set so that the leg 3b substantially contacts the side wall 8A of the spring seat 2 and the curved portion 3a substantially contacts the restricting member flange 14, that is, the U bolt 3 restricts the side wall 8A of the spring seat 2. It is arranged so as to be between the member flange 14. The U-bolt regulating member 5 is provided as described above, and the U-bolt 3 is disposed between the side wall 8A of the spring seat 2 and the regulating member flange 14, thereby preventing the U-bolt 3 from laterally shifting. doing.

A contact portion 16 between the axle housing 1 and an outer portion of the spring seat 2 where the notch 12 is formed.
About A, the part except the part which interferes with U bolt 3 is welded. In addition, regarding the joining between the spring seat 2 and the axle housing 1, a braking torque, a driving torque, a braking reaction force, and a driving reaction force are applied;
High welding strength is required due to the application of radial load such as vehicle weight and road surface input, and axial load, etc. In order to meet this demand, the inner portion of the spring seat 2 where the notch 12 is formed, the axle housing 1 and Is welded to the abutting portion 16B, and a portion of the abutting portion 16A that does not interfere with the U bolt 3 is compensated for a decrease in welding strength due to no welding, and a desired welding strength is obtained. I'm trying to get

[0007]

In the axle housing mounting structure described above, in order to ensure high welding strength, the abutting portion between the axle housing 1 and the inner portion of the spring seat 2 where the notch 12 is formed. 16B
However, the working space for welding the contact portion 16B is narrow. Therefore, welding workability is poor,
The productivity is inferior to that extent. Further, in order to secure high welding strength, it is necessary to weld the inner portion of the portion where the notch 12 of the spring seat 2 is formed and the contact portion 16B between the axle housing 1 as described above. As the number increases, the productivity is further reduced.

Further, the notch 12 of the spring seat 2 is joined to the axle housing 1, so that the joint area between the spring seat 2 and the axle housing 1 is small, and the rigidity of the joint changes sharply. Then, stress was easily concentrated on the joint. Further, in the above-described prior art, the U-bolt restricting member 5 is provided to prevent the U-bolt 3 from being laterally displaced.
The device structure becomes complicated, and the number of assembling steps increases, which leads to a decrease in productivity.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has an axle housing mounting structure capable of simplifying welding work and reducing stress concentration at a joint between a spring seat and an axle housing. The purpose is to provide. It is another object of the present invention to provide an axle housing mounting structure capable of reducing the number of components and preventing lateral displacement of a U-bolt.

[0010]

According to the first aspect of the present invention,
An axle housing mounting structure in which a spring seat is interposed between an axle housing and a leaf spring, wherein the spring seat is suspended from a seat body abutting on the leaf spring and faces the seat body. It is characterized by comprising a pair of side wall portions, and a substantially gutter-like flange portion for mounting the axle housing, which extends in a direction away from each other on the pair of side wall portions.

The invention according to a second aspect is characterized in that, in the configuration according to the first aspect, welding is performed on a contact portion between the tip side portion of the flange portion and the axle housing.

The invention described in claim 3 is the first or second invention.
In the configuration described above, a U-bolt in which a curved portion is wound around the axle housing and a tip end of a leg is held by a lower spring seat disposed on a surface opposite to a spring seat contact surface of the leaf spring, A clamping rib is formed on the flange so as to clamp the U bolt together with the side wall of the spring seat.

The invention described in claim 4 is the first to third aspects of the present invention.
Wherein the reinforcing ribs are formed on the flange portion. According to a fifth aspect of the present invention, in the configuration according to any one of the first to fourth aspects, the spring seat is made of a sheet metal.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An axle housing mounting structure according to an embodiment of the present invention will be described below with reference to FIGS. Note that the same reference numerals are used for members and portions equivalent to those shown in FIGS. 6 to 8, and the description thereof is omitted as appropriate. 1 to 3, the spring seat 2 is made of sheet metal, and a pair of side walls 8A of the spring seat 2 (the axle housing 1 of the wall 8).
The angled portion 11 formed on a pair of wall portions 8) orthogonal to
A flange portion 20 extending in a direction away from each other is formed. The flange portion 20 has a substantially gutter shape along the axle housing 1. The inner diameter of the flange portion 20 is slightly smaller than the outer diameter of the axle housing 1, so that the axle housing 1 can be placed in a substantially close contact state.

As shown in FIGS. 2, 4, and 5, a rib (hereinafter, referred to as a clamping rib) 21 protruding outward from the flange portion 20 is formed on each of the upper edge portions of the flange portion 20. Have been. The holding rib 21 is formed at a portion of the flange portion 20 that is separated from the angled portion 11 by the thickness of the U-bolt 3, and the U-bolt 3 is held between the angled portion 11 (and thus the side wall portion 8A). It has become. A rib (hereinafter, referred to as a protrusion) outwardly protruding from the flange portion 20 is provided at a substantially central portion in the circumferential direction of the flange portion 20 on a side connected to the side wall portion 8A (the mountain portion 11).
This is called a reinforcing rib 22. ) Is formed.

The two U-bolts 3 are formed by winding the curved portion 3a around the axle housing 1 and inserting the leg portion 3b into the hole 4a of the lower spring seat 4. A nut 15 is screwed into the male screw 3c of the axle housing 1 to couple the axle housing 1 to the leaf spring 6. In this case, the U-bolt 3 is in a state where the leg 3b is clamped between the side wall 8A (the chevron portion 11) of the spring seat 2 and the clamping rib 21. Preventing. Flange part 20
The contact portion 16C between the tip of the axle housing 1 and the axle housing 1 is welded.

In the mounting structure of the axle housing configured as described above, the axle housing 1 is placed on the flange portion 20 of the spring seat 2 and they are joined to each other. And the change in rigidity becomes gentle. For this reason, concentration of stress at the joint between the spring seat 2 and the axle housing 1 can be reduced.

A portion where the spring seat 2 and the axle housing 1 are welded is a contact portion 16C between the tip portion of the flange portion 20 and the axle housing 1, so that a work space can be widened. Thereby, the welding workability can be improved. In the prior art described above,
The work space is narrow because welding is performed to the contact portion 16B between the inner portion of the spring seat 2 where the notch 12 is formed and the axle housing 1, and welding workability is low. In the embodiment, the welding workability and, consequently, the productivity can be improved.

The welding of the contact portion 16C between the tip end of the flange portion 20 and the axle housing 1 is performed by using the contact portion 1C.
Since the 6C does not receive the interference of the U bolt 3, it can be performed for the entire area. For this reason, the notch 12 of the spring seat 2 required in the above-described prior art is required.
A large welding strength can be ensured without welding the contact portion 16B between the axle housing 1 and the inner portion of the portion where the axle is formed. Therefore, the number of welding locations is reduced, and the productivity can be improved accordingly.

The leg 3b of the U-bolt 3 is located between the side wall 8A (the chevron 11) of the spring seat 2 and the holding rib 21.
Are clamped, thereby preventing the U bolt 3 from laterally shifting. In the above-described prior art, the U-bolt regulating member 5 is provided to prevent the U-bolt 3 from laterally shifting. In contrast, in the present embodiment, the U-bolt 3 is provided without separate components. Since the lateral displacement is prevented, the number of parts is reduced, the structure is simplified, and the number of assembly steps is reduced, so that productivity can be improved.

Reinforcing ribs 22 are formed on the flange portion 20 of the spring seat 2, so that the rigidity of the flange portion 20 and thus the spring seat 2 can be increased. Further, the spring seat 2 is made of sheet metal, so that the weight can be reduced as compared with the case where it is a cast product.

[0022]

According to the first aspect of the present invention, the axle housing is mounted on the flange portion of the spring seat and they are joined together, so that the joint area between the spring seat and the axle housing is increased, and the change in rigidity is reduced. Therefore, the concentration of stress at the joint between the spring seat and the axle housing can be reduced. It is possible to weld a contact portion between the tip portion of the flange portion and the axle housing, whereby a large welding work space can be obtained and the workability of welding can be improved.

According to the second aspect of the present invention, the portion where the spring seat and the axle housing are welded is a contact portion between the tip end of the flange portion and the axle housing, so that the working space is widened and the welding workability is improved. Can be achieved. In addition, welding of the contact portion between the distal end portion of the flange portion and the axle housing can be performed over the entire area by preventing the contact portion from receiving the interference of the U-bolt. For this reason, it is possible to secure a large welding strength without welding the inner portion of the notch-formed portion of the spring seat and the contact portion with the axle housing, which is required in the above-described conventional technology. In addition, the number of welding points can be reduced and productivity can be improved.

According to the third aspect of the present invention, since the U bolt is sandwiched between the side wall of the spring seat and the sandwiching rib, the lateral displacement of the U bolt can be prevented. Further, since the U-bolt is prevented from being laterally displaced without providing a dedicated component such as a U-bolt regulating member required in the prior art, the number of components is reduced, the structure is simplified, and the assembling is performed. The number of steps is reduced, and the productivity can be improved.

According to the fourth aspect of the present invention, since the reinforcing rib is formed on the flange portion of the spring seat, the rigidity of the flange portion and thus the spring seat can be increased. According to the fifth aspect of the present invention, since the spring seat is made of sheet metal, the weight can be reduced as compared with the case where the spring seat is formed as a cast product.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing the spring seat of FIG. 1;

FIG. 3 is a front view showing a mounting structure of the axle housing of FIG. 1;

FIG. 4 is a side view showing a mounting structure of the axle housing of FIG. 1;

FIG. 5 is a plan view showing a mounting structure of the axle housing of FIG. 1;

FIG. 6 is a perspective view showing a spring seat, an axle housing, and a U-bolt regulating member used in an example of the related art.

FIG. 7 is a perspective view showing an example of a conventional axle housing mounting structure.

FIG. 8 is a perspective view showing the spring seat of FIGS. 6 and 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Axle housing 2 Spring seat 6 Leaf spring 7 Seat main body 8A Side wall part 20 Flange part

Claims (5)

[Claims] 1. An axle housing mounting structure in which a spring seat is interposed between an axle housing and a leaf spring, wherein the spring seat faces a seat body that contacts the leaf spring, and faces the seat body. An axle comprising: a pair of side walls that are vertically extended; and a generally gutter-shaped flange portion on which the axle housing extends and extends in a direction away from the pair of side walls. Housing mounting structure. 2. The mounting structure for an axle housing according to claim 1, wherein a welding portion is provided at a contact portion between the front end portion of the flange portion and the axle housing. 3. A U-bolt having a curved portion wound around an axle housing and a tip end of a leg held by a lower spring seat disposed on a surface of the leaf spring opposite to a spring seat contact surface of the leaf spring. 3. A clamping rib is formed on a flange portion so as to clamp a U bolt together with a side wall portion of a spring seat.
The mounting structure of the described axle housing. 4. The mounting structure for an axle housing according to claim 1, wherein a reinforcing rib is formed on the flange portion. 5. The axle housing mounting structure according to claim 1, wherein the spring seat is made of sheet metal.