WO2009110256A1

WO2009110256A1 - Knuckle bracket

Info

Publication number: WO2009110256A1
Application number: PCT/JP2009/050910
Authority: WO
Inventors: 長谷川靖; 中川大雅; 石田肇; 野上修作
Original assignee: カヤバ工業株式会社
Priority date: 2008-03-07
Filing date: 2009-01-15
Publication date: 2009-09-11
Also published as: JP2009216129A; JP5166077B2

Abstract

Disclosed is a knuckle bracket (1) comprising a bracket body (2) having C-shaped section, a pair of attachment pieces (3, 4) which extend in parallel to each other from the both ends of the bracket body (2) and are fastened to a steering knuckle, and supporting pieces (5, 6) each of which is formed by bending the upper end of each of the fixing pieces (3, 4) to the inside. The supporting pieces (5, 6) and the bracket body (2) are welded to the outer cylinder (10) of a buffer and fixed the buffer, and the supporting pieces (5, 6) are so bent and formed that that the upper end surfaces (5a, 6a) thereof are made to be flush with the upper end face (2b) of the bracket body (2).

Description

Specification

Knuckle Bracket Technology Field

The present invention relates to an improvement in a knuckle bracket that connects a shock absorber and a steering knuckle. Background art

A shock absorber, particularly a strut-type shock absorber, is provided with a bracket called a knuckle bracket on the outer cylinder in order to connect the end of the shock absorber to the steering knuckle.

In the case of the knuckle bracket 100 disclosed in Japanese Patent Laid-Open No. 2 00 0-1 8 3 0 9 and Japanese Patent Laid-Open No. 2 0 4 6-9 0 19, for example, as shown in FIG. In addition, a C-shaped bracket body 10 1, a pair of mounting pieces 10 2, 1 0 3 that extend in parallel from both ends of the bracket body 10 1 1 and fastened to a steering knuckle (not shown), and each mounting piece 1 Each support piece 10 04 and 105 is formed by bending the upper ends of 0 2 and 1 0 3 inward.

Then, the outer cylinder 1 0 6 of the shock absorber is held by the inner edge of each support piece 104, 10 05 and the bracket body 1 0 1, and the support pieces 1 04, 1 0 5 and the bracket body 1 0 1 are The knuckle bracket 100 is fixed to the shock absorber by welding to the shock absorber outer tube 106. Disclosure of the invention

In the conventional knuckle bracket 100 described above, it is formed by sequentially pressing the base material M made of a single metal plate. At this time, as shown in FIG. 6, the upper end portion (shaded portion) of the portion a that becomes the mounting portion 10 0 2 and 10 3 of the base material M is bent along a horizontal line along the upper end of the portion b that becomes the bracket body. The support pieces 104, 1 0 5 are formed.

Then, the upper end surfaces 1 0 7 and 1 0 8 of the support pieces 1 04 and 1 0 5 are as shown in FIG. The tip side is twisted to face the shock absorber side, which is the inner side.

In addition, since the bending of the supporting pieces 10 4 and 1 0 5 is used as described above, the bent portions of the supporting pieces 1 0 4 and 1 0 5 can be completely plastically deformed. It may be difficult to create a gap between the bracket body 10 0 to which the twist is applied and the outer cylinder 10 6 of the shock absorber at the boundary between the support pieces 10 4 and 10 5.

The upper end surfaces 1 0 7, 1 0 5 of the support pieces 1 0 4, 1 0 5 and the upper end surfaces 1 0 7, 1 0 8 and the upper end surface 1 0 9 of the bracket body 1 0 1 are placed on the upper end surfaces 1 0 7, 7 The side surfaces of 0 8, 1 0 9 and the outer cylinder 1 0 6 are melted and welded, but since the upper end surfaces of the support pieces 1 0 4 and 1 0 5 are twisted, the molten metal It is difficult to stay in place, and the molten metal may flow downward from the gaps described above, and the conventional knuckle bracket 100 is likely to cause poor welding.

Accordingly, the present invention has been made to improve the above-described problems, and an object of the present invention is to provide a nut bracket capable of suppressing poor welding.

In order to achieve the above object, the problem-solving means in the present invention includes a bracket body having a C-shaped cross section, a pair of attachment pieces that extend in parallel from both ends of the bracket body and are fastened to the steering nut, In the knuckle bracket, each support piece is formed by bending the upper end of the mounting piece inward, and each support piece and the bracket body are welded to the outer cylinder of the shock absorber and fixed to the shock absorber. The upper end surface is bent and formed so as to be flush with the upper end surface of the bracket body. According to the knuckle bracket of the present invention, the upper end surface of the support piece and the upper end surface of the bracket body form a horizontal and flush surface, so that the molten welding material is easily collected, and the support piece Since the upper end surface is not twisted, there is no gap between the support piece and the bracket body and the outer cylinder of the shock absorber. Therefore, it is possible to prevent poor welding.

Furthermore, since the occurrence of poor welding can be prevented, the support piece and the bracket body can be uniformly welded over substantially the entire circumference of the outer cylinder, and there is no welding unevenness, so that only a part of the outer cylinder is stressed. It is possible to prevent the situation where the fatigue of the outer cylinder becomes intense due to concentration, and the durability of the shock absorber will be improved. Brief Description of Drawings

FIG. 1 is a perspective view of a knuckle bracket according to an embodiment.

FIG. 2 is a plan view of the knuckle bracket according to the embodiment.

FIG. 3 is a side view of the knuckle bracket according to the embodiment.

FIG. 4 is a plan view of the base material of the knuckle bracket according to the embodiment. FIG. 5 is a perspective view of a conventional knuckle bracket.

FIG. 6 is a plan view of a conventional knuckle bracket.

FIG. 7 is a plan view of a base material of a conventional knuckle bracket. BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be described below based on the embodiments shown in the drawings.

As shown in FIGS. 1 to 3, the knuckle bracket 1 in one embodiment includes a bracket body 2 having a C-shaped cross section and a pair of bolts that extend in parallel from both ends of the bracket body 2 and are fastened to a steering knuckle not shown. Mounting pieces 3, 4 and support pieces 5, 6 formed by bending the upper ends of the mounting pieces 3, 4 inward. The knuckle bracket 1 holds the outer periphery of the outer cylinder 10 of the shock absorber at the inner edges of the support pieces 5 and 6 and the bracket body 2, and the support pieces 5 and 6 and the bracket body 2 are connected to each other. It is attached to the shock absorber by being welded to the outer cylinder 10.

Hereinafter, each part will be described in detail. The bracket body 2 has a C-shaped cross section, and is provided with a notch 2 a at the back as shown in FIG. This notch 2 a is provided to reduce the weight of the knuckle bracket 1 and need not be provided.

The mounting pieces 3 and 4 are provided with two port insertion holes 3 a and 4 a, respectively. A steering knuckle mounting portion (not shown) is inserted between the mounting pieces 3 and 4, Fasten the mounting pieces 3 and 4 and the above mounting parts with the unillustrated port and nut that pass through the mounting part of the steering knuckle inserted into the through holes 3 a and 4 a, and cushion them with this knuckle bracket 1 Can be connected to the steering knuckle.

Further, the lower ends of the mounting pieces 3 and 4 are bent outward to be provided with flange portions 3b and 4 so that the strength of the mounting pieces 3 and 4 is improved. Furthermore, the upper ends of the mounting pieces 3 and 4 are bent inward by bending to form the supporting pieces 5 and 6, and the supporting pieces 5 and 6, as shown in FIGS. 1 and 3, The upper end of 4 is bent toward the bracket 卜 body 2 side, that is, inwardly toward the inside of the knuckle bracket 1, so that the upper end of the support pieces 5 and 6 and the upper end of the bracket body 2 are The upper end surface 5a, 6a of the support piece 5, 6 that becomes the end surface of the neck portion 7 and the upper end surface 2b of the bracket body 2 are flush with each other so that they are not twisted in the middle. It has become.

In forming each part of the knuckle bracket 1 as described above, specifically, as shown in FIG. 4, it is performed by pressing a base material P made of a single metal plate, First, the base material P is processed to form trapezoidal ribs 3 c and 4 c on the parts c and d corresponding to the mounting pieces 3 and 4, and the flange portions 3 b and 4 b are also processed at the same time. .

After that, in the base material P, the upper ends of the parts c and d and the parts e and f (shaded portions in the figure) protruding upward are bent at the bend lines g and h, and the support pieces 5 and 6 are attached. Form. The bending lines g and h extend from both ends of the base material P toward the diagonally upward in Fig. 4 and are bent from the middle to the upper end of the base material P so as to surround the mountain-shaped portions e and f. By bending the parts e and f along the bend lines g and h, as shown in Fig. 1, the support pieces 5 and 6 are curved surface parts W that are ώ inward along the bend lines g and h. The upper end surfaces 5a and 6a of the support pieces 5 and 6 can be bent into an arc shape so as to follow the outer periphery of the outer cylinder 10, and the upper end surface of the part i corresponding to the bracket body 2 The upper end surfaces of the support pieces 5 and 6 are flush with each other.

The inner shape of the chevron portions e and f is such that, when bent as described above, the upper end surfaces 5 a and 6 a of the support pieces 5 and 6 are arcuate and the upper end surface 2 b of the bracket body 2 is Is set to be flush with each other.

Then, when the parts e and f are bent in this manner and the subsequent processing of the bracket body 2 is finished, the support pieces 5 and 6 form the curved surface portion W and are constricted toward the inside of the knuckle bracket 1. The neck at the upper end of the support pieces 5, 6 and the upper end of the bracket body 2

7 will be formed.

Finally, the part i corresponding to the bracket body 2 is processed into a C shape, and the port insertion hole 3 A and 4a are drilled to form all parts of the knuckle bracket 1.

The knuckle bracket 1 configured as described above has the outer cylinder 10 held between the inner edges of the support pieces 5 and 6 and the inner edge of the bracket body 2, and the support pieces 5 and 6 and the bracket body 2 are connected to the outer cylinder. Weld to 1 0.

During this welding, the upper end surfaces 5a and 6a of the support pieces 5 and 6 and the upper end surface 2b of the bracket body 2 form a horizontal and flush surface, and the molten welding material accumulates. In addition, since the upper end surfaces 5 a and 6 a of the support pieces 5 and 6 are not twisted, a gap is created between the support pieces 5 and 6 and the outer cylinder 10 at the boundary between the bracket body 2 and the support pieces 5 and 6. Therefore, it is possible to prevent welding defects.

Furthermore, since the occurrence of poor welding can be prevented, the support pieces 5 and 6 and the bracket body 2 can be uniformly welded over substantially the entire circumference of the outer cylinder 10, and there is no unevenness in the outer cylinder 10. If stress concentrates only on a part of the tube and fatigue of the outer cylinder 10 becomes severe, it is possible to prevent the situation, and the durability of the shock absorber will be improved. This is the end of the description of the embodiment of the present invention, but the scope of the present invention is of course not limited to the details shown or described. Industrial applicability

The knuckle bracket of the present invention can be used to connect a shock absorber and a steering knuckle.

Claims

The scope of the claims

1. Cross section C-shaped bracket 卜 body, a pair of mounting pieces that extend in parallel from both ends of the bracket 締結 body and fastened to the steering knuckle, and each support formed by bending the upper end of each mounting piece inward A knuckle bracket in which each support piece and the bracket body are welded to an outer cylinder of the shock absorber and fixed to the shock absorber, and the upper end surface of the support piece is flush with the upper end surface of the bracket body. A knuckle bracket characterized by being bent like this.

2.Bend the upper end of the mounting piece to the side of the bracket body to form a support piece, and then form the neck by the support piece and the upper end of the bracket body, so that the upper end surface of the support piece and the bracket body The knuckle bracket according to claim 1, wherein the upper end surface of the knuckle is flush.