JPH069757U - Link member - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the strength of the link member winding collar without increasing the manufacturing cost. Further, a link member having good coating quality is provided. [Structure] The winding collar 13 is formed by annularly bending a plate material whose corners are notched or chamfered, and the abutting portion 15 of the plate material is provided with positioning recesses 29 and 31. Therefore, the positioning recesses 29, 31
With the relatively small recesses, the collar and the bar can be efficiently welded to each other in a state of being abutted with each other with high accuracy without causing a decrease in strength due to. In the abutting portion 15 of the winding collar 13 for welding the hollow bar member 19,
Communication hole 67 for communicating the inside of the hollow portion with the inside of the winding collar
Since the coating liquid is discharged through the communication hole 67 when the link member is coated, the coating quality is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

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

[0002]

[Prior art]

 One of the members that are rotatably or swingably mounted to support members or transmit loads, is a T-shaped member consisting of a cylindrical collar and a bar material welded to the outer peripheral surface of this collar. There is a new link member. As an example of the use of the link member, for example, in the case of automobile parts, a tension rod used for a suspension can be cited, and 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 butting portion 15 which is a joint of the collar 13, and a pair of semicircular positioning recesses 17 at both ends. Are formed. Therefore, when the bar member 19 is abutted against the collar 13 and welded, a jig (not shown) is engaged with the recessed portion 17 so that the bar member 19 is positioned so as to straddle the butted portion 15 of the collar 13. The collar 13 and the bar 19 can be positioned relative to each other. As a result, the bar material 19 is surely welded to a position straddling the abutting portion 15.

[0003]

[Problems to be solved by the device]

 As described above, if the plate material is wound and formed into a collar, the collar can be manufactured by a press, so that the cutting work is more difficult than when the steel pipe is cut into a predetermined length to manufacture the collar. There is an advantage that it becomes unnecessary and the production cost can be reduced. However, when forming a strip-shaped plate by pressing, if a recess for positioning is formed on the side surface of this strip-shaped plate material, the thickness of the plate material generally increases when punching holes are formed in the plate material. Accordingly, it is necessary to increase the size of the punched hole. Therefore, if the plate material becomes thicker, it becomes necessary to form an unnecessarily large recess. Therefore, as shown in FIG. 10, when a concave portion is pressed on the side surface of the plate material, a large concave portion must be formed as the thickness of the plate material becomes thicker, and the strength of the collar becomes insufficient and the positioning accuracy deteriorates. Will end up. On the other hand, if a cutting process is used to form the notch, the notch can be formed relatively easily, but the manufacturing cost increases.

Further, since the rod material is welded by striking the abutting portion of the collar while straddling it, if a hollow rod material is used, the hollow portion of the rod material and the hollow portion of the collar become the abutting portion of the collar. It will communicate through the gap that is formed. Therefore, when using a coating method such as electrodeposition coating in which the object to be coated is dipped in the coating material, the pretreatment liquid or liquid such as paint will enter and remain in the gap formed at the butted part. At the time of drying, the residual liquid blows out together with the air in the hollow, causing a problem of paint failure.

The present invention, which has been made in view of the above problems, provides a link member having a high-strength collar with a thick wall thickness, high manufacturing efficiency, low cost, and a hollow rod having good coating quality. An object is to provide a link member using a material.

[0006]

[Means for Solving the Problems]

 The present invention for achieving the above-mentioned object comprises a collar formed by winding a strip-shaped plate material and abutting both end faces of the plate material to form a cylindrical shape, and a bar material welded to the outer peripheral surface of the collar. In the link member, at least one of the four corners of the plate member has a chamfered portion, and the color at which the recessed portion for positioning is formed at the abutting portion and the weld end surface are abutted with the collar. A link member having a rod member that is welded to the outer peripheral surface of the color at the welding end surface by straddling a portion. Further, the present invention relates to a link member including 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 rod material welded to an outer peripheral surface of the collar, The collar having a recess formed in at least one end face of both end faces of the plate material and having a communicating hole at the abutting portion of the both end faces, and a hollow hole facing the communicating hole, and a welding end face abutting the collar. And a hollow rod member that is welded to the outer peripheral surface of the collar at the weld end surface by straddling a portion.

[0007]

[Action]

 In the present invention having the above-mentioned structure, the collar is formed by roll-forming a plate material having chamfered corners, and a positioning recess is formed at the end of the abutting part at both ends of the plate material by roll-forming. Is formed. When the rods are butt-welded to the outer peripheral surface of the collar and welded to each other, the collar is positioned using the recess formed at the end of the butt portion. By providing a recess at the abutting portion where the rods are welded in this way, it is not necessary to form large chamfers at the corners of the plate material, and the strength of the collar does not decrease due to the positioning recess. A link member having sufficient strength can be efficiently manufactured. Moreover, since a relatively small positioning recess can be formed at the end of the abutting portion of the collar, the positioning accuracy can be improved.

When a hollow bar is used, when a plate is formed as a collar, a recess is formed in the end face of the plate, and then roll molding is performed. A communication hole that communicates with the inside of the unit is formed. Therefore, when the link member is painted, the liquid paint that has entered the hollow hole in the hollow bar will be reliably discharged through the communication hole, causing paint failure due to paint pools and blowing. It is possible to obtain a link member which is well coated and does not generate

[0009]

【Example】

 An embodiment of the link member of the present invention will be described below with reference to the drawings. It should be noted that the same members as those already described are designated by the same reference numerals. 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 cylindrical winding collar 13. As shown in FIGS. 2 (a) and 2 (b), the winding collar 13 is a member in which a strip-shaped plate member 21 is formed in a cylindrical shape, and as shown in the drawing, a corner portion of the rectangular plate member 21. A chamfer, that is, a cutout portion is formed in advance on the wire 23 before the roll forming. Therefore, when the plate material 21 is roll-formed and the both end surfaces 25 and 27 are butted, as shown in FIG. 2B, a portion 15 where the both end surfaces 25 and 27 come into contact with each other, that is, a butted portion of the winding collar 13. V-shaped recesses 29 and 31 for positioning are formed at both ends of the groove 15. In order to form the concave portion in the abutting portion 15 of the winding collar 13, it is sufficient that the chamfered portion is provided at at least one of the corners of the plate material 21 to be roll-formed. Therefore, when the plate member 21 whose one corner is chamfered is roll-formed, the winding 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. 4 (a), 4 (b) and 4 (c), and therefore it may be selected according to the processing conditions of the plate material.

Further, as shown in FIG. 1, the tension rod 11 has a bar member 19. The bar material 19 is butted against the winding collar 13 by straddling the abutting portion 15 of the winding collar 13, and by welding the outer circumference of one end of the bar material 19 abutted over the entire circumference. , Is joined to the winding collar 13. The welding position of the bar 19 and the winding collar 13 is determined by engaging the projections provided on the assembly jig (not shown) with the recesses 29 and 31 formed at the end of the butting portion 15 of the winding collar 13. By performing the positioning in this way, the rod 19 can be easily positioned so as to straddle the abutting portion 15. As shown in FIG. 5, it is desirable that the tip end surface 33 of the bar member 19 that abuts the winding collar 13 be 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 material 19 is evenly distributed and abutted against the abutting portion 15 of the winding collar 13 at the boundary and welded.

If a chamfer, that is, a cutout portion is formed at the corner of the plate 21 at the same time when the plate 21 is cut out, a relatively small chamfer is formed even for the plate 21 having a large wall thickness. Since it is possible to reduce the positioning concave portion formed at the end of the butted portion, the positioning accuracy of the winding collar 13 and the bar material 19 when they are welded and joined to each other can be improved. It is possible to improve. Therefore, the bar 19 can be connected to the outer peripheral surface of the winding collar 13 so that the bar 19 surely straddles the butting portion 15.

FIG. 6 is a diagram showing a vehicle suspension in which the above-mentioned link member is used as a tension rod. As shown in the figure, a lower link 45 having pivot shafts 41 and 43 at one end and an upper arm 47 are pivotally supported by a vehicle body (not shown) at the pivot shafts 41 and 43, and the lower link 45 and the upper arm are supported. A knuckle 49 for supporting the wheel W is rotatably attached to the tip end of the swing side 47 of the wheel 47 via ball joints 51 and 53. The lower link 45 is connected to a tension rod 11 extending substantially in the front-rear direction of the vehicle body, that is, in the direction of arrow B, and the lower link 45 and the tension rod 11 form a lower arm. The tension rod 11 is swingably connected to a vehicle body (not shown) with a cylindrical winding collar 13 provided at an end thereof, and an elastic material, that is, an insulator 55 is mounted in the winding colorr 13. . The tension rod 11 receives a load applied to the suspension in the direction of arrow B, that is, the front-back 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 flatly crushed. The tip 56 is flattened by cutting or plastic working.

FIG. 7 and FIG. 8 are views showing a tension rod of another embodiment, and the members common to the members in the above embodiment are designated by the same reference numerals. The winding collar 13 shown in FIG. 7 includes the plate member 21 shown in FIG. 8A, that is, the plate member 21 having semicircular cutouts 61 and 63 on both end faces 25 and 27 and a positioning hole 65 at the center. It is formed by winding. Therefore, as shown in FIGS. 7 and 8 (b), the collar 13 in which the plate member 21 is formed in an annular shape has a communication hole 67 formed of notches 61 and 63 at the center of the butted portion 15, and has an outer periphery. The surface has a positioning hole 65. A hollow bar material 19 is welded to the winding collar 13 with the open end of the bar material 19 facing the communication hole 67 of the winding collar 13, and the tip surface 33 of the bar material 19 is abutted. The position is across 15. Therefore, the hollow portion 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 rod 19 is flat and plastically worked, and the inside of the hollow rod 19 communicates with the inside of the winding collar 13 only through the communication hole 67. Note that FIG. 7C 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 color 13 formed by bending a plate material 21 having a recess 69 formed on an end surface 27 into an annular shape. have. The surface forming the recess may be either end surface 25 or 27. Further, as shown in FIG. 9A, by chamfering the corner portion 23 of one of the end faces 25 and 27 of the plate member 21, as shown in FIG. Positioning recesses 29 and 31 may be formed in the portion 15. Furthermore, the communication hole 67 formed in the winding collar 13 may be used for positioning, and in this case, it is not necessary to form another positioning hole or recess.

In this way, when the communication hole that connects the hollow inside of the rod and the outside is provided, when coating the tension rod, first, the tension rod is immersed in the chemical conversion treatment solution and then pretreated. However, in such a coating process, the inflow and outflow of the solution such as the pretreatment liquid or the paint is smoothly carried out inside the hollow rod, so that the electrodeposition coating liquid is soaked. Even if a method of coating an object to be coated by immersing it in a coating material such as coating is used, the solution that has flowed into the hollow portion can be quickly discharged, and the coating quality is greatly 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, it can be applied to an anchor arm that supports the body side of the torsion bar. 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 so much strength. In its application example, a pedal such as an accelerator pedal is supported, A pedal support member that transmits a pedaling force can be mentioned.

[0017]

[Effect of device]

 As described above, according to the present invention, since the positioning recess is formed by chamfering the corners of the plate material, the press working can be used to form the recess even when forming a thicker collar. The recess can be formed easily and at low cost. Further, since the positioning recess is provided at the abutting 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 abutting part of the collar to facilitate the inflow and outflow of solutions such as pretreatment liquid and paint. Even if a coating method in which the object to be coated is dipped in the paint is used, the solution that has flowed into the hollow portion can be quickly discharged, and the coating quality is improved.

[Brief description of 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 roll-formed and a roll collar formed by roll-forming;

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

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

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 an embodiment of a suspension having a tension rod,

FIG. 7 (a) is a front view showing a tension rod of another embodiment, FIG. 7 (b) is a side view thereof, and FIG.
Is a view as seen from an arrow A in FIG. 7A showing the inside of the tension rod,

FIG. 8 is a perspective view showing a plate material to be roll-formed and a roll collar formed by winding.

FIG. 9 is a perspective view showing another embodiment of a plate material to be roll-formed and a roll-shaped collar to be roll-formed;

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

Claims (2)

[Scope of utility model registration request] 1. A link member comprising a collar formed by winding a strip-shaped plate material and forming both ends of the plate material into a cylindrical shape, and a bar material welded to an outer peripheral surface of the collar material. The collar having a chamfered portion in at least one of the four corner portions, and the welding end surface straddling the butted portion of the collar. A link member having the welding end face and the bar member which is abutted against the outer peripheral surface of the collar and welded. 2. A link member comprising a collar formed by winding a strip-shaped plate material and abutting both end faces of the plate material to form a cylindrical shape, and a hollow rod material welded to an outer peripheral surface of the collar, The collar having a recess formed in at least one end face of both end faces of the plate member and having a communicating hole in the abutting portion of the both end faces, and a hollow hole facing the communicating hole and a welding end face having a butting portion of the collar. And a hollow bar member that is welded to the outer peripheral surface of the collar at the weld end face by welding.