JP2000159140A - Lock structure of connecting part of split type tie rod - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A split that can easily perform a locking operation of a connecting portion of a split type tie rod used in a center take-off type power steering device or the like of a vehicle without requiring a working space. Provided is a lock structure of a connecting portion of a mold tie rod. SOLUTION: A tie rod 1 for connecting a steering shaft and a wheel includes a plurality of rod portions 2, 3,
The plurality of rod portions 2 and 3 are
In the lock structure of the connecting portion of the split type tie rods, the connecting portions of the plurality of rod portions 2 and 3 by the joint bolts 6 are slits 4b and 5b in the axial direction.
Are formed, and lock bands 8 and 8 are applied to the outer periphery of the connecting portion, and both ends of the lock bands 8 and 8 are
The tie rod 1 is fastened and fastened by bolts 13 in a direction orthogonal to the axis of the tie rod 1. At least a part of the lock bands 8, 8 is welded to the connecting portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock structure for a connecting portion of a split type tie rod used in a center take-off type power steering device of a vehicle and the like.
In particular, the present invention relates to a lock structure of a connecting portion of a split type tie rod which can easily perform a locking operation of a connecting portion of the split type tie rod without requiring a working space.

[0002]

2. Description of the Related Art A tie rod used in a center take-off type power steering device has a length extending from substantially the center in the vehicle width direction to the inside of a wheel. It is often divided into two rod parts, and these two rod parts are connected and adjusted by a joint bolt or the like in many cases. In this case, each rod portion is hollow for weight reduction.

[0003] As described above, as a lock structure of a connecting portion of a split type tie rod constituted by connecting a plurality of rod portions by joint bolts, conventionally, FIGS.
As shown in FIG. 0, male screw portions 06b, 06 formed on both sides of a central hexagonal head portion 06a of the joint bolt 06, respectively.
c are female threaded holes 04a, 05a (female threaded holes) formed in opposing ends 04, 05 of two rod portions 02, 03 to be connected.
04a are not shown), and lock nuts 020, 020 are attached to the external thread portions 06b, 06c of the joint bolt 06 exposed from the female screw holes 04a, 05a, respectively. The joint bolt 06 and the rod part 0
The screw connection with 2, 03 was locked (Japanese Patent Application No. 9-3)
No. 32201).

As described above, when the lock nuts 020, 020 are screwed into the ends 04, 05 of the rod portions 02, 03 and tightened, the male screw portions 06b, 06 of the joint bolt 06 are tightened.
The screwing relationship between the male screw c and the female screw holes 04a and 05a of the rod portions 02 and 03 is tightened in the direction away from each other so that the thread of one screw and the screw groove of the other screw are screwed. Since the engagement becomes firm, none of the screws can be relatively rotated and screwed, and the screw connection between the joint bolt 06 and the rod portions 02, 03 is locked.

The interiors of the rod portions 02 and 03 are hollow, and the innermost portions of the female screw holes 04a and 05a are
Plug screws 07, 07 (one of the plug screws 07 is not shown) are screwed in such a way that water does not enter into a hollow portion deeper than that. Opposing ends of both rod portions 02 and 03
A pair of flat portions 022, 022 (one flat portion 022 is not shown) to which the mouth of the wrench 021 (see FIG. 10) can be applied is formed on the peripheral surface in the vicinity of 04 and 05. .

[0006]

In the lock structure of the connecting portion of the conventional split type tie rod 01, the lock nuts 020, 020 are screwed toward the end portions 04, 05 of the rod portions 02, 03. In order to prevent the rod portions 02 and 03 from rotating together, the mouth of the wrench 021 should be applied to the pair of flat portions 022 and 022 of the rod portions 02 and 03 to fix the rod portions 02 and 03. (See FIG. 10).

The rod portions 02, 03
After fixing the lock nuts 020, 020 screwed on the external thread portions 06b, 06c of the joint bolt 06 by using another wrench 021, the rod portions 02, 03
It must be screwed towards the ends 04, 05 of the.

For this reason, a large working space is required so that the two wrenches 021 and 021 can be turned around the axis of the tie rod 01. Moreover, depending on the vehicle body layout, it is difficult to secure such a wide working space, and the locking work of the connecting portion of the split tie rod 01 becomes extremely complicated.

The invention of the present application solves the above-mentioned problems of the conventional lock structure of the connecting portion of the split type tie rod 01, and requires a work space for locking the connecting portion of the split type tie rod 01. An object of the present invention is to provide a lock structure of a connecting portion of a split-type tie rod, which can be easily performed without using the same.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a lock structure of a connecting portion of a split type tie rod which solves the above-mentioned problems, and the invention described in claim 1 relates to a steering shaft and a steering shaft. A tie rod connecting a wheel is composed of a plurality of rod portions, and the plurality of rod portions are connected to each other by a joint bolt. A slit is formed in the connecting portion in the axial direction, and a lock band is applied to the outer periphery of the connecting portion. Both ends of the lock band are tightened by bolts in a direction orthogonal to the axis of the tie rod. A lock structure for a connecting portion of a split-type tie rod, wherein the connecting portion is configured to be connected.

According to the first aspect of the present invention, since a plurality of rod portions are jointed by joint bolts in the axial direction, slits are respectively formed in the connecting portions of the plurality of rod portions. , A lock band is applied, and both ends of the lock band are fastened and fastened by bolts in a direction orthogonal to the axis of the tie rod.

[0012] Thus, the locking of the connecting portion by the joint bolts of the plurality of rod portions is not performed by the lock nut as in the prior art, but instead of the lock band applied to the outer periphery of the connecting portion. Both ends are tightened and fastened by bolts in a direction perpendicular to the axis of the tie rod.

As a result, in order to lock the connecting portions of the plurality of rod portions by the joint bolts, it is sufficient if there is enough space for tightening the bolts. Work space can be reduced because it can be performed in a space. In addition, the work can be performed simply because the operation of rotating the bolt is sufficient.

Further, since the lock band is manufactured as a separate part from the tie rod, a hollow pipe material can be used for the tie rod (a plurality of rod portions), which facilitates the manufacture. Further, the structure is simplified. If it is not made as a separate part, it is necessary to manufacture a hollow pipe material having a deformed cross section in which a fastening flange portion for passing a bolt is integrally formed.

Further, according to the first aspect of the present invention, at least a part of the lock band is welded to the connecting portion. As a result, since the lock band does not rotate or move on the tie rod shaft, the lock operation can be performed more easily.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention described in claims 1 and 2 of the present application shown in FIGS. 1 to 8 will be described below. FIG. 1 is a perspective view of a lock structure of a connecting portion of a split type tie rod in the present embodiment, FIG. 2 is a longitudinal sectional view of the lock structure of FIG. 1, and FIG. 3 is a rod portion forming the split type tie rod of FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 2, in which illustration of a joint bolt is omitted, and FIG. 5 is used for the lock structure of FIG. 1. 6 is a left side view of FIG. 5, FIG. 7 is a side view as viewed from below in FIG. 5, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

1 and 2, a split tie rod 1 to which a lock structure of a connecting portion according to the present embodiment is applied includes a rod portion 2 connected to a steering shaft and a rod portion connected to a wheel. And a tie rod end 3. Each of the two rod portions 2 and 3 is formed so that most of its entire length is hollow.

At opposite ends 4, 5 of the two rod portions 2, 3 to be connected, female screw holes 4a, 5a are formed, respectively. Male screw portions 6b and 6c formed on both sides of the hexagonal head 6a are screwed respectively. Plug screws 7, 7 are provided at the innermost portions of the female screw holes 4a, 5a so as to prevent water from entering the hollow portions deeper than them.
7 are screwed and mounted respectively.

These ends 4 and 5 also have narrow slits 4b and 4b, as shown better in FIG. 3, over a length that does not reach the position where the plug screws 7 and 7 are respectively screwed. 5b are cut out. These slits 4b, 5b have ends 4, 5 when the split type tie rod 1 is assembled to an actual vehicle.
Is formed so as to be located below the.

These slits 4b, 5b are formed by cutting a cutter (not shown) in the axial direction, so that their bottom surfaces are formed by the shafts of the rod portions 2, 3 as is clear from FIGS. Inclined to a plane perpendicular to. FIG. 3 shows only the slit 4 b formed by cutting out the end 4 of the rod portion 2.

As described above, the slits 4b, 5b are formed at the opposed ends 4, 5 of the two rod portions 2, 3 to be connected, so that the male screw portions of the joint bolt 6 are formed in the female screw holes 4a, 5a. The work of screwing each of 6b and 6c can be performed relatively easily.

Male thread portions 6b and 6c of joint bolt 6
Are cut in opposite directions, and when the joint bolt 6 is rotated in one direction, the rod portions 2 and 3 on both sides are screwed in directions approaching or moving away from each other. Therefore, joint bolt 6
Works like a turnbuckle.

A lock band 8 is applied to the outer periphery of each end 4, 5 forming a connecting portion where the two rod portions 2, 3 are connected by a joint bolt 6. The lock band 8 has a width shorter than the length of the slits 4b, 5b, and surrounds the slits 4b, 5b.
It is applied to the outer periphery of each end 4,5.

As shown in detail in FIGS. 4 to 8, the lock band 8 has a central band portion 8 having an arc-shaped cross section.
a, and a bolt penetrating portion 8b bulged in a bag shape at one end.
And a bolt penetrating portion 8c similarly bulged in a bag shape at the other end, and a nut 8d integrally welded to the outer surface of the bolt penetrating portion 8c.

The natural inner diameter of the central band portion 8a is substantially equal to the natural outer diameter of each of the end portions 4 and 5 of the rod portions 2 and 3, and is connected to the female screw holes 4a and 5a of these end portions 4 and 5. Before the external thread portions 6b and 6c of the bolt 6 are screwed, respectively, the lock bands 8 and 8 are connected to the ends 4 and
5 can be freely fitted.

The bolt penetrating portion 8b and the bolt penetrating portion 8c have a symmetrical shape, and the opening portions which are swelled in a bag shape and open are opposed to each other, and the bolt penetrating holes 9 and 10 are formed. The central band portion 8a is bent parallel to the central portion of the central band portion 8a by bringing the end mating surfaces 11 and 12 of the bent plate portion close to each other to be parallel to the axis of the central band portion 8a. It extends from both ends.

The direction of the common axis of the bolt through holes 9 and 10 is set to be along the direction orthogonal to the axis of the central band portion 8a. The axial width of the central band portion 8a is smaller than the widths of the bolt through portions 8b and 8c in the same direction, as better shown in FIG.

Therefore, when the bolt 13 is passed through the bolt through holes 9 and 10 and is firmly fastened to the nut 8d using a box wrench 14 (see FIG. 1) or the like, the end mating surface 11 and As a result, the bolt penetration portion 8b and the bolt penetration portion 8c are joined together.

At this time, the natural inner diameter of the central band portion 8a is reduced, and the gap between the slits 4b, 5b formed in the ends 4, 5 of the rod portions 2, 3 is narrowed. The screwing relation between the female screw holes 4a, 5a formed in the female screw holes 4a, 5a and the male screw portions 6b, 6c of the joint bolt 6 screwed into these female screw holes 4a, 5a is described in the radial direction. To each other.

As a result, the engagement between the thread of one screw and the thread groove of the other screw in the same direction becomes rigid.
Neither of the screws can be relatively rotated and screwed, and the screw connection between the joint bolt 6 and the rod portions 2 and 3 is locked.

It is desirable that at least a part of the lock band 8 is welded and fixed in place at the end portions 4 and 5 of the rod portions 2 and 3 (see the portion A in FIG. 2). By doing so, the lock band 8 does not rotate or move on the axes of the rod portions 2 and 3, so that the lock operation can be easily performed.

Since the present embodiment is configured as described above, the following effects can be obtained. Slits 4b and 5b are formed in the ends 4 and 5 of the two rod portions 2 and 3 which are connected by the joint bolt 6 in the axial direction.
So that the bolt penetrating portions 8b and 8c at both ends of the lock band 8 are fastened and fastened by bolts 13 in a direction perpendicular to the axis of the tie rod 1 (rod portions 2 and 3). Has been.

As a result, the connection of the two rod portions 2 and 3 with the joint bolt 6 by the joint bolt 6 is not performed by the lock nut as in the conventional art. Rock band 8 applied
Are tightened by bolts 13 in a direction perpendicular to the axis of the tie rod 1 and are connected.

As a result, in order to lock the joint of the two rod portions 2 and 3 with the joint bolt 6, the bolt
It is sufficient if there is enough space for tightening the bolt 13. Since the bolt 13 can be tightened in a small space using the box wrench 14 or the like, the working space is small. In addition, the work can be performed simply because the operation of rotating the bolt 13 is sufficient.

Further, since the lock band 8 is manufactured as a separate part from the tie rod 1, a hollow pipe material can be used for the tie rod 1 (two rod portions 2, 3), and the manufacture is easy. become. Further, the structure is simplified.

Further, at least a part of the lock band 8 is welded in place at the ends 4, 5 of the two rod portions 2, 3. As a result, the lock band 8 does not rotate or move on the axis of the tie rod 1, and the locking operation can be performed more easily and easily.

In the present embodiment, the rock band 8
The center band portion 8a, the bolt penetrating portions 8b and 8c bulged in a bag shape, and the nut 8d, but are not limited thereto, and various structures can be employed. For example, instead of the bolt penetration portions 8b and 8c bulged in a bag shape, bolt penetration portions formed in a simple band portion following both ends of the central band portion 8a may be used.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lock structure of a connecting portion of a split type tie rod according to an embodiment of the present invention described in claims 1 and 2 of the present application.

FIG. 2 is a longitudinal sectional view of the lock structure of FIG.

FIG. 3 is a partial cross-sectional bottom view of an end of a rod part constituting the split tie rod of FIG. 1;

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 2, in which illustration of a joint bolt is omitted.

FIG. 5 is a front view of a lock band used in the lock structure of FIG. 1;

FIG. 6 is a left side view of FIG. 5;

FIG. 7 is a side view as viewed from below in FIG. 5;

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 5;

FIG. 9 is a diagram showing a conventional example.

FIG. 10 is a perspective view showing a state in which the connecting portion of the split tie rod is locked in the conventional example of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Split type tie rod, 2, 3 ... Rod part, 4 ... End part, 4a ... Female screw hole, 4b ... Slit, 5 ... End part, 5a
... female screw hole, 5b ... slit, 6 ... joint bolt,
6a: central hexagonal head, 6b, 6c: male thread, 7: plug screw, 8: lock band, 8a: central band, 8b
, 8c ... bolt through-hole, 8d ... nut, 9, 10 ... bolt through-hole, 11, 12 ... mating surface, 13 ... bolt, 14 ... box wrench.

Claims (2)

[Claims] 1. A lock structure of a connecting portion of a split type tie rod, wherein a tie rod connecting a steering shaft and a wheel comprises a plurality of rod portions, wherein the plurality of rod portions are connected by a joint bolt. A slit is formed in the joint portion of the rod portion by the joint bolt in the axial direction, and a lock band is applied to the outer periphery of the joint portion. A lock structure for a connecting portion of a split-type tie rod, wherein the locking portion is fastened and fastened in a direction perpendicular to the connecting direction. 2. At least a part of the rock band,
The lock structure of a connection part of a split type tie rod according to claim 1, wherein the connection part is welded to the connection part.