JP2582424Y2 - Link member - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention comprises a cylindrical collar and a rod which is welded to the outer peripheral surface of the collar.
The present invention relates to a T-shaped link member.

[0002]

2. Description of the Related Art Rotatably or swingably mounted,
One of the members for supporting the member or transmitting the load is a T-shaped link member composed of a cylindrical collar and a bar welded to the outer peripheral surface of the collar. As an example of the use of the link member, for example, in the case of an automobile part, a tension rod used for a suspension can be cited. FIG. 10 shows a tension rod 11 which has been attempted to be developed for use in a suspension. As shown in the figure, a cylindrical collar 13 formed by winding a plate material has a butt portion 15 which is a seam of the collar 13, and a pair of semicircular positioning recesses 17 are provided at both ends. Is formed. Therefore, color 13
When the bar 19 is butt-welded to the collar 13, the jig (not shown) is engaged with the recess 17 so that the bar 19 is brought into a position where it straddles the butt portion 15 of the collar 13. The rod 19 and the bar 19 can be positioned with respect to each other. Thereby, the bar 19 is reliably welded to a position straddling the butted portion 15.

[0003]

As described above, when a collar is formed by winding a plate material to form a collar, the collar can be manufactured by pressing. Therefore, the collar is manufactured by cutting a steel pipe to a predetermined length. Cutting is unnecessary compared to the case,
There is an advantage that production costs can be reduced.
However, when forming a strip-shaped plate by pressing, when forming a positioning recess on the side surface of this strip-shaped plate, generally when forming a punched hole in the plate, as the thickness of the plate increases, Since it is necessary to increase the size of the punched hole, when the thickness of the plate material is increased, it is necessary to form an unnecessarily large concave portion. Therefore, when the concave portion is pressed on the side surface of the plate material as shown in FIG. 10, a large concave portion must be formed as the thickness of the plate material increases, and the strength of the collar becomes insufficient or the positioning accuracy decreases. I will. On the other hand, if cutting is used to form the notch, the notch can be formed relatively easily, but the manufacturing cost increases.

[0004] In addition, since the bar is struck and welded across the butt portion of the collar, if a hollow bar is used, the hollow portion of the bar and the hollow portion of the collar are joined to the butt portion of the collar. It will communicate through the formed gap. Therefore, when using a coating method in which the object to be coated is immersed in the paint, such as electrodeposition coating, a liquid such as a pretreatment liquid or paint penetrates into a gap formed in the butt portion and remains. There is a problem that the residual liquid is blown out together with the air in the hollow to cause paint failure.

In view of the above problems, the present invention provides a link member having a low-cost, high-production-efficiency, thick-wall, high-strength collar, and a hollow bar having good coating quality. It is an object to provide a used link member.

[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 an outer peripheral surface of the collar. A link member comprising a bar member welded to the collar member, wherein the collar has a chamfered portion in at least one of the four corners of the plate member, and a recess for positioning is formed in the butted portion; A link member having the bar material welded to the collar by striking the weld end face across the butt portion of the collar and abutting the weld end face against the outer peripheral surface of the collar. The present invention also provides a collar formed by winding a strip-shaped plate material and abutting both end surfaces of the plate material to form a cylindrical shape,
A link member comprising a hollow rod welded to the outer peripheral surface of the collar, wherein the collar has a communication hole at a butt portion of the both end surfaces, wherein a recess is formed in at least one end surface of both end surfaces of the plate material; A link having a hollow hole opposed to the communication hole, a welding end face straddling a butt portion of the collar, and abutting against the outer peripheral surface of the collar at the welding end face to be welded and joined. It is a member.

[0007]

In the present invention having the above structure, the collar is formed by winding and shaping a plate material with chamfered corners.
At the end of the butted portion of both ends of the sheet material by winding molding,
A recess for positioning is formed. When the bars are butted against the outer peripheral surface of the collar and welded together, the collar is positioned using the concave portion formed at the end of the butted portion. By providing a recess at the butted portion where the bar is welded in this manner, it is not necessary to form a large chamfer at the corner of the plate, without causing a decrease in the strength of the collar due to the positioning recess. A link member having sufficient strength can be manufactured efficiently. Further, since a relatively small positioning concave portion can be formed at the end of the butted portion of the collar, the positioning accuracy can be improved.

When a hollow rod is used, after forming a concave portion on the end surface of a plate material formed as a collar, winding is performed. Then, the hollow portion of the hollow rod and the hollow portion of the collar are formed at the abutting portion of the collar. And a communication hole which communicates with. Therefore, when coating the link member, the liquid paint that has entered the hollow hole in the hollow rod material is surely discharged through the communication hole, and coating defects due to the accumulation and blowing of the paint are prevented. A link member that does not generate and has good coating is obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a link member 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 which is an embodiment of the link member of the present invention. As shown, the tension rod 11 has a winding collar 13 having a cylindrical shape. FIG. 2 (a) and FIG.
As shown in (b), the winding collar 13 is a member formed by forming a strip-shaped plate member 21 into a cylindrical shape, and as shown in FIG. Is formed in advance with a chamfer, that is, a notch. Accordingly, when the plate material 21 is formed by winding and the both end surfaces 25 and 27 are abutted, as shown in FIG.
5, 27 are in contact with each other, ie, the wound collar 1
V-shaped concave portions 29, 31 for positioning are formed at both ends of the butting portion 15 of No.3. In addition, winding color 1
In order to form a concave portion in the butted portion 15 of 3, the chamfered portion may be provided in at least one of the corners of the plate material 21 to be formed by winding. Therefore, when the plate material 21 in which only one of the corners is chamfered is wound and formed, the wound collar 13 as shown in FIG. 3 is formed. Further, the chamfered shape can be set to various shapes including the shapes shown in FIGS. 4A, 4B and 4C, and it is preferable to select the chamfered shape according to the processing conditions of the plate material.

Further, as shown in FIG. 1, the tension rod 11 has a bar 19. The rod material 19 straddles the butting portion 15 of the winding collar 13 and
The bar 19 is joined to the winding collar 13 by welding the outer periphery of one end of the butted bar 19 over the entire periphery. Positioning of the welding position between the bar 19 and the winding collar 13 is performed by using the butt 1 of the winding collar 13.
The protrusions provided on an assembling jig (not shown) are engaged with the recesses 29 and 31 formed at the end of the nozzle 5, and the positioning is performed in this manner.
The bar 19 can be easily positioned so as to straddle the butting portion 15. In addition, as shown in FIG. 5, it is desirable that the distal end surface 33 of the bar 19 abutted against the winding collar 13 is finished so as to be in close contact with the outer peripheral surface of the winding collar 13. Then, it is preferable that the tip end surface of the bar 19 is evenly distributed and abutted on the butt portion 15 of the collar 13 at the boundary and welded.

Further, when the plate 21 is cut out, the plate 2
If a chamfer, that is, a notch is formed at the corner of No. 1, it is possible to form a relatively small chamfer even for a thick plate material 21, and it is possible to form a chamfer at the end of the butted portion. Since the positioning recess formed can be made smaller, it is possible to improve the positioning accuracy of the winding collar 13 and the bar 19 when they are welded and joined. Therefore, the bar 19 can be connected to the outer peripheral surface of the collar 13 so that the bar 19 can straddle the butting portion 15 without fail.

FIG. 6 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 43 and a lower link 45 are pivotally supported by a vehicle body (not shown) on pivot shafts 41 and 43.
A knuckle 4 for supporting the wheel W is provided at the tip of the swinging side of 7.
9 is rotatably mounted via ball joints 51 and 53. The lower link 45 is connected to the tension rod 11 extending substantially in the front-rear direction of the vehicle body, that is, in the direction of the arrow B. The lower link 45 and the tension rod 11 constitute a lower arm. The tension rod 11 is swingably connected to a vehicle body (not shown) in a cylindrical winding collar 13 provided at an end portion, and an elastic material, that is, an insulator 55 is mounted in the winding collar 13. The tension rod 11 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 19 is flat, and when a hollow bar is used as the bar, the tip 56 is crushed flat. The tip 56 is formed flat by cutting or plastic working.

FIGS. 7 and 8 are views showing a tension rod according to another embodiment, and the same reference numerals are given to members common to those in the above embodiment. The winding collar 13 shown in FIG. 7 is a plate material 21 shown in FIG.
That is, it is formed by winding the plate material 21 having the semicircular notches 61 and 63 on both end surfaces 25 and 27 and having the positioning hole 65 in the center. Therefore,
As shown in FIGS. 7 and 8B, the collar 13 in which the plate material 21 is formed in an annular shape has a communication hole 67 including cutouts 61 and 63 at the center of the abutting portion 15 and is positioned on the outer peripheral surface. It has a hole 65. A hollow bar 19 is welded to the winding collar 13 with the open end of the bar 19 facing the communication hole 67 of the winding collar 13.
The tip surface 33 of the bar 19 is located at a position straddling the butted portion 15. Therefore, the hollow part 69 of the bar 19 communicates with the inside of the winding collar 13 through the communication hole 67. As shown in FIG. 6, the tip of the hollow bar 19 is plastically worked flat, and the inside of the hollow bar 19 communicates with the inside of the winding collar 13 only through the communication hole 67. FIG. 7 (c)
FIG. 8 is a view of the winding collar 13 shown in FIG.

FIG. 9 is a view showing a link portion according to still another embodiment. This link member has a winding collar 13 formed by annularly bending a plate material 21 having a concave portion 69 formed on an end face 27. doing. Note that the surface forming the concave portion may be any of the end surfaces 25 and 27. FIG. 9 (a)
As shown in FIG.
9 may be chamfered to form concave portions 29 and 31 for positioning in the butted portion 15 of the winding collar 13 as shown in FIG. 9B. Further, the communication hole 67 formed in the winding collar 13 may be used for positioning, and in this case, there is no need to form another positioning hole or recess.

As described above, when the communication hole for communicating the hollow interior of the bar with the outside world is provided, when coating the tension rod, the tension rod is first immersed in a chemical conversion solution and then pre-treated. However, in such a coating process, the inflow and outflow of a solution such as a pretreatment liquid or a paint is smoothly performed inside the hollow rod material. Even if a method of coating an object by dipping the object in a coating material is used, the solution flowing into the hollow portion can be quickly discharged, and the coating quality is significantly improved.

The link member of the present invention can be applied not only to the tension rod as described above but also to various members. For example, the present invention can be applied to an anchor arm or the like that supports the 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.

[0017]

As described above, according to the present invention, since the concave portion for positioning is formed by chamfering the corner of the plate material, even when a thicker collar is formed, press forming is performed to form the concave portion. The recess can be formed easily and at low cost. Since the positioning recess is provided at the butting portion of the collar, the link member can have high strength. In addition, a communication hole that connects the hollow inside of the bar and the inside of the collar is provided at the butting part of the collar to facilitate the inflow and outflow of solutions such as pretreatment liquid and paint. Even if a coating method of dipping an object to be coated in a coating material is used, the solution flowing into the hollow portion can be quickly discharged, and the coating quality is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a tension rod according to an embodiment of the present invention;

FIG. 2 is a perspective view showing a plate material to be wound and a wound collar to be wound;

FIG. 3 is a perspective view showing another embodiment of the winding collar;

FIG. 4 is a perspective view showing an example of the shape of a chamfered corner;

FIG. 5 is a side view showing a tension rod according to an embodiment of the present invention;

FIG. 6 is a perspective view showing one embodiment of a suspension having a tension rod.

7A is a front view showing a tension rod of another embodiment, FIG. 7B is a side view thereof, and FIG.
Fig. 7A is a view from the arrow A in Fig. 7A showing the inside of the tension rod;

FIG. 8 is a perspective view showing a plate material to be wound and a wound collar to be wound;

FIG. 9 is a perspective view showing another example of a plate material to be wound and a wound collar to be wound;

FIG. 10 is a perspective view showing a tension rod of a comparative example.

[Explanation of symbols]

11 ... tension rod 13 ... winding collar 15
… Butt 19… Bar 21… Plate 23
... corners 25, 27 ... end faces 29, 31 ... recesses

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-11509 (JP, A) JP-A-2-303691 (JP, A) JP-A-4-102717 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) B23K 9/00 501 B23K 9/025 B23K 9/028 B23K 37/053 B23K 33/00 B60G 7/00

Claims (2)

(57) [Scope of request for utility model registration] 1. A link member comprising: 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 bar material welded to an outer peripheral surface of the collar. The collar having a chamfered portion in at least one of the four corners, and a concave portion for positioning is formed in the butted portion; and the welding end face straddling the butted portion of the collar. A link member having the welding end face and the rod material abutted on the outer peripheral surface of the collar and welded and joined. 2. A link member comprising a collar formed by winding a strip-shaped plate material and abutting both end surfaces of the plate material to form a cylindrical shape, and a hollow bar material welded to an outer peripheral surface of the collar. A collar having a recess formed in at least one end face of both end faces of the plate material and having a communication hole at a butt portion of the both end faces; and a hollow hole opposed to the communication hole and a welded end face having a butt portion of the collar. A link member having the welded end face abutting against the outer peripheral surface of the collar and being welded and joined.