JP2582425Y2 - Link member - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a link member comprising a cylindrical collar and a bar, and more particularly to a link member having improved productivity and quality.

[0002]

2. Description of the Related Art Rotatably or swingably mounted,
As one of the members for supporting the members and transmitting the load, as shown in FIG. 6, there is a link member 15 composed of a cylindrical collar 11 and a bar 13 welded to the side surface of the collar. , Used in various places. It is also used in automobiles, and examples include a tension rod that guides a knuckle that supports wheels and forms a suspension arm. The tension rod is rotatably supported by the vehicle body with a cylindrical collar in which a cushioning material such as rubber is loaded.

[0003] As shown in the figure, a cylindrical winding collar 11 formed by winding a plate material has a contact portion 17 at both end surfaces abutted by winding, that is, an abutting portion 17. It has a concave portion 19 for positioning. Therefore, when the rod 13 is brought into contact with the winding collar 11 and welded, the jig (not shown) is engaged with the concave portion 19 so that the butting portion 17 comes to a position where the rod 13 comes into contact with the rod 13. 11 can be positioned. Thereby, the bar 13 is reliably welded to a position straddling the butted portion 17 of the winding collar 11.

[0004]

[Problem to be solved by the invention] However, FIG.
As shown in (a), since the side surface of the winding collar 11 is a curved surface, problems such as insufficient strength and poor welding are likely to occur when the bar material 13 having the flat joint end surface 21 is welded.
Therefore, in order to reliably weld the bar material 13, FIG.
As shown in (1), the joining end face 21 of the bar 13 must be processed into a shape corresponding to the side shape of the winding collar 11, which leads to an increase in the number of manufacturing steps and cost. In addition, as shown in FIG. 6, if the concave portion 19 or the hole for positioning is provided on the end face or side face of the winding collar, sufficient color strength may not be secured.

An object of the present invention, which has been made in view of the above problems, is to provide a high-strength link member without increasing the number of steps and costs.

[0006]

In order to achieve the above object, the present invention provides a collar formed by winding a strip-shaped plate material and abutting both end surfaces of the plate material into a cylindrical shape, and a center shaft attached to the collar. In a link member made of a bar material welded and joined in a direction perpendicular to the above, a concave portion is provided on each of both end surfaces of the plate material, and the collar, which forms a fitting hole in a butt portion, and the welding end portion are the butt portion A link member that fits into the fitting hole across the portion and is welded to the collar at the welding end.

[0007]

The winding collar is formed by winding a plate material having a semicircular concave portion at both butting end surfaces, and a fitting hole larger than a bar is formed at the butting portion by winding. Therefore, the insertion amount of the bar into the fitting hole is adjustable, and even if the length of the bar varies, the length of the bar of the link member can be easily adjusted by taking the bar in and out. Adjustable, stable quality link members can be produced. Further, by using the fitting hole for inserting the bar as a positioning reference, a concave portion for positioning is not required, so that the number of steps can be reduced and the strength can be prevented from lowering.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Note that the same reference numerals are given to members common to the members already described. FIG. 1 is a perspective view showing a tension rod 15 which is an embodiment of the link member of the present invention. As shown, the tension rod 15 has a cylindrical winding collar 11, and as shown in FIGS. 2A and 2B, the cylindrical winding collar 11 has a rectangular shape. The sheet material 25 is formed by winding. FIG. 2 (a)
As shown in FIG.
Are formed with semicircular concave portions 31 and 33. Therefore, when winding is performed, as shown in FIG.
A fitting hole 35 is formed in the butted portion. The shape of the fitting hole does not need to be particularly circular, and may be appropriately selected depending on conditions such as the shape of a rod material inserted into the fitting hole and welded and joined. As shown in FIGS. 3A and 3B, the bar 13 welded to the winding collar 11
The rod 13 is inserted into the fitting hole 35 formed in the butted portion 17 of the winding collar 11, the end 37 on the joining side of the bar 13 is inserted and positioned, and then welded. Therefore, by inserting the bar 13 into the fitting hole 35 of the winding collar 11, the winding collar 11 and the bar 13 can be positioned very easily. Furthermore, since there is no need to provide a positioning recess on the end face or side face of the winding collar 11,
The number of steps can be reduced. Also, at this time, as shown in FIG. 4, the joining side end 37 of the bar 13 is prevented from protruding inside the inner diameter of the winding collar 11 so that the joining side end 37 of the bar 13 is carefully taken. There is no need for finishing, and the process can be further simplified. Since the amount of the rod 13 to be inserted into the fitting hole 35 can be freely adjusted, dimensional control during the production of the rod is facilitated, and the yield is improved.

FIG. 5 is a view showing a vehicle suspension in which the above-mentioned link member is used as a tension rod. As shown, a pivot shaft 41,
A lower link 45 having an upper arm 47 is pivotally supported by a vehicle body (not shown) on pivot shafts 41 and 43.
A knuckle 49 for supporting the wheel W
Are rotatably mounted via ball joints 51 and 53. The lower link 45 has a tension rod 1 extending substantially in the front-rear direction of the vehicle body, that is, in the direction of the arrow.
5 are connected, and the lower link 15 and the tension rod 15 constitute a lower arm.
The tension rod 15 is swingably connected to the vehicle body at a cylindrical winding collar 11 provided at an end, and an elastic material, that is, an insulator 55 is mounted in the winding collar 11. Since the bar is welded so that the end on the joining side of the bar does not protrude into the inside of the winding collar, there is no problem in press-fitting the insulator.
The tension rod 15 receives a load applied to the suspension in the direction of arrow B, that is, in the front-rear direction of the vehicle body. The tip 56 of the bar 13 is flat. If the bar to be used is a hollow bar, the tip 56 is crushed. If the bar is a solid bar, the tip is cut or processed. It is formed flat by plastic working or the like.

[0010] Even if a hollow rod having an opening at the end on the joining side is used as the rod used for the tension rod, it can be reliably welded and joined in the same manner as a solid rod. Since an insulator or the like is generally press-fitted into the inside of the wound collar, the inside and the outside of the hollow bar can be shut off, so that no foreign matter enters the inside.

The link member is used in a wide variety of applications, for example, an anchor arm for supporting a torsion bar on the vehicle body side. Further, the link member can be used not only as a member requiring relatively high strength as described above, but also as a member not requiring much strength, and in the application example, supporting a pedal such as an accelerator pedal, A pedal supporting member that transmits a stepping force can be used.

[0012]

[Effects of the Invention] As described above, the link member of the present invention is welded after inserting the joining side end of the rod into the fitting hole of the winding collar, so that the positioning of the winding collar and the rod can be ensured. ,
High quality. Moreover, since it is not necessary to provide a positioning hole or a concave portion in the winding collar, the strength is high. Further, by adjusting the amount of insertion of the rod into the fitting hole, the effective length of the member protruding from the winding collar can be finely adjusted, so that the dimensional accuracy is extremely stable. Furthermore, after processing the end surface on the joining side of the bar into a shape corresponding to the side shape of the winding collar, instead of abutting against the side surface of the winding collar and welding, the bar is inserted into the fitting hole and positioned. Since the welding is performed, the link member of the present invention is positioned accurately in the direction of the flat surface of the bar tip with respect to the winding collar.

The above effects can be obtained with the link member of the present invention regardless of the thickness of the winding collar used, but the effect is particularly remarkable in a link member having a thick winding collar.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a tension rod which is an embodiment of a link member of the present invention;

FIG. 2A is a perspective view showing a plate material formed by winding and forming into a winding collar, and FIG. 2B is a perspective view showing a winding collar formed by winding and forming the plate material;

FIG. 3A is a front view showing a state in which a winding collar and a bar are positioned at a welding position, and FIG. 3B is a side view thereof.

FIG. 4 is a sectional view showing an AA section of FIG.

FIG. 5 is a perspective view showing a vehicle suspension in which the link member of the embodiment is used as a tension rod,

FIG. 6 is a perspective view showing a tension rod of a comparative example,

FIG. 7A is a front view showing a tension rod of another comparative example, and FIG. 7B is a front view showing a tension rod of a comparative example.

[Explanation of symbols]

11 ... winding color 13 ... bar 1
5 ... Link member 17 ... But part 19 ... Recess 2
1 ... end on the joining side 25 ... plate material

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) B23K 9/00 501 B23K 9/025 B23K 9/028 B23K 33/00 B23K 37/053 B60G 7/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A collar formed into a cylindrical shape by winding a strip-shaped plate material and abutting both end surfaces of the plate material, and a rod material welded to the collar in a direction perpendicular to the center axis. A collar provided with recesses at both end surfaces of the plate material to form fitting holes at the butting portions; and a welding end fitted into the fitting holes across the butting portions and the welding. A link member having the bar material welded to the collar at an end portion.