JPS6211686Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a torsion bar support structure for an automobile suspension device in which an anchor arm of a torsion bar is supported via an anchor bolt to a cross member of a vehicle body.

Conventionally, as a support structure for this type of torsion bar, as shown in FIG. 7, the tip of a torsion bar 21 extending below a cross member 20 of a vehicle body is non-rotatably coupled to an anchor arm 22. An anchor bolt 24, which is inserted through a washer 23 having a semicircular cross section and is engaged with the lower end of the anchor arm 22, is passed through the cross member 20 from below to above and protrudes, and is anchored above the cross member 20. A known structure is such that the protrusion 24a of the bolt 24 is inserted into the anchor pin 25, and then a nut 26 is screwed into the bolt 24 for support.

However, the above is an anchor bolt 24
Since the protrusion 24a protrudes above the cross member 20, the vehicle body floor must be provided above by the height h of the protrusion 24a. Therefore, if the height from the road surface to the vehicle roof is subject to design constraints, the height from the vehicle floor to the vehicle roof (height inside the vehicle interior) is reduced by the height h of the protrusion, It gives the occupants a feeling of crampedness. To this end, if a convex part that protrudes from below to above is provided on the part of the car body floor corresponding to the above-mentioned protrusion, and the car body floor is set low, the height inside the car interior can be secured. However, there is a problem in that the above-mentioned protrusion gets in the way of the passenger's feet or the seat attachment part.

On the other hand, in Utility Model Application Publication No. 51-60021, a support device configured to prevent the anchor bolt from protruding above the cross member is proposed, but this type of device has a horizontal hole provided in the cross member,
The anchor bolt is inserted into and latched onto the anchor pin inserted into this horizontal hole. Forming a horizontal hole in the cross member in this way means that
This leads to a reduction in the stiffness of the cross member. Moreover, there are drawbacks such as the difficulty of inserting the anchor pin into the horizontal hole.

This idea was developed in view of the problems and shortcomings of the conventional methods described above, and is an automotive suspension system that is installed without interfering with the vehicle floor, improves the rigidity of the cross member, and is easy to assemble. The purpose is to provide a torsion bar support structure.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

In FIG. 1, 1 is a vehicle body frame, 2 is a cross member, 3 is a suspension arm, and 4 is a torsion bar. The base end of the torsion bar 4 is non-rotatably attached to the suspension arm 3, and the tip end is attached to the suspension arm 3 in a non-rotatable manner. is supported by the cross member 2 by means to be described later, and is adapted to absorb vertical swinging of the suspension arm 3 by torsional elasticity.

In Figures 2 and 3, cross member 2
are an upper member 2A and a lower member 2B with a cap-shaped cross section.
, and each vertical wall portion 2a1, 2a
Flange portions 2a3, 2b4, 2b3, 2b extending outward at the ends of 2, 2b1, 2b2.
4 are formed, and these flange parts 2a3, 2a
4, 2b3, and 2b4 are welded facing each other to form a closed cross-sectional shape. A portion of the continuous joint portion 5 between the upper member 2A and the lower member 2B is spaced apart vertically in a substantially circular shape to form a pipe clamping portion 6. That is, the fourth
As shown in the figure, the upper member 2A has flange portions 2a3 and 2a4 of the vertical wall portions 2a1 and 2b1.
The clamping surfaces 6a1 and 6a2 are recessed in a substantially semicircular shape with mutually opposing positions facing upward, and
The lower member 2B has the clamping surfaces 6a1 and 6 of the flange parts 2b3 and 2b4 of the vertical wall parts 2b1 and 2b2.
The pipe clamping portion 6 is formed by forming clamping surfaces 6b1 and 6b2 that are recessed downward in a substantially semicircular shape at a position facing the pipe a2.

In FIGS. 2 to 4, 7 is a pipe, 8 is an anchor pin, 9 is an anchor arm, and 10 is an anchor bolt. The pipe is bridged, and its both ends are fixed to the outer end of the pipe holding part 6 by welding w. As shown in FIG. 5, circular notches 7a and 7b are formed at the center in the axial direction to face each other in the radial direction.

The anchor pin 8 is rotatably inserted into the pipe 7, and has a threaded hole 8a penetrating in the radial direction at the center in the axial direction.

The anchor arm 9, as shown in FIG.
A cylindrical portion 9A is fixed to the base end, and a pair of locking pieces 9a and 9b are formed at one end so as to face each other in the front and back. Then, the serrations 4a formed on the outer circumferential surface of the tip end of the torsion bar 4 are inserted into the cylindrical portion 9A of the anchor arm 9, and the serrations 4a formed on the inner circumferential surface of the cylindrical portion 9A (not shown) are inserted into the cylindrical portion 9A of the anchor arm 9. The tip of the torsion bar 4 is fixed to the anchor arm 9 in a non-rotatable manner. 1
Reference numeral 1 designates a washer having a semicircular cross section, and the anchor bolt 10 is inserted from below into a through hole 11a formed in the center of the washer 11 in the axial direction. 11 is bridge-engaged with the semicircular notches 9a1 and 9b2 in which the locking pieces 9a and 9b of the anchor arm 9 are formed, and the anchor bolt 10 is inserted from below the cross member 2 into the bottom plate 2B1 of the lower member 2B. Formed through hole 2B2
(See Fig. 4) and the threaded hole 8 of the anchor pin 8 through the circular notch 7b formed at the bottom of the pipe 7.
a, and is exposed to the vicinity of the upper plate 2A1 of the upper member 2A through a circular notch 7a formed in the upper part of the pipe 7. In addition, in FIG. 1, 12 is a wheel.

In the above configuration, the anchor bolt 10 in FIG.
is screwed to an anchor pin 8 in a pipe 7 which is inserted into a pipe clamping part 6 formed in a joint part 5 of the cross member 2, and protrudes upward from the cross member 2. Therefore, it does not interfere with the vehicle body floor (not shown) provided above the cross member 2. Further, since the pipe 7 is inserted into the pipe clamping part 6 formed at the joint part 5 of the cross member 2, and both ends of the pipe are fixed to the pipe clamping part 6 by welding, the pipe 7 is reinforced. It serves as a member and improves the rigidity of the cross member 2. Further, since the anchor pin 8 is configured to be inserted into the pipe 7 in a freely rotatable manner, the anchor pin 8 can be easily inserted using the pipe 7 as a guide. The anchor pin 8 may be inserted into the pipe 7 and then rotated so that the screw hole 8a thereof faces in the vertical direction. Furthermore, since the work of clamping the pipe 7 into the pipe clamping portion 6 can be performed simultaneously with the work of joining the upper member 2A and lower member 2B of the cross member 2, the assembling work efficiency is improved.

As explained above, according to this invention, the anchor pin is rotatably inserted into the pipe inserted into the joint of the cross member, and the anchor bolt attached to the anchor arm is inserted into the screw hole of this anchor pin. Because it is screwed in, it can be installed without interfering with the vehicle floor, improving the rigidity of the cross member, and has the advantage of being easy to assemble.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the relationship between the torsion bar, suspension arm, and cross member, Fig. 2 is a rear view of the torsion bar support structure according to this invention from the rear of the vehicle body, and Fig. 3 is shown along the - line in Fig. 2. Figure 4 is a cross-sectional view taken along the same line, Figure 5 is an exploded perspective view of the pipe and anchor pin, Figure 6 is an exploded perspective view showing the relationship between the torsion bar tip, washer, and anchor bolt with respect to the anchor arm. 7 are rear views from the rear of a vehicle body showing an example of a conventional torsion bar support structure. 2...Cross member, 2A...Upper member, 2
B... lower member, 4... torsion bar, 5...
…Joint, 7…Pipe, 8…Anchor pin, 8
a...Screw hole, 9...Anchor arm, 10...Anchor bolt.

Claims (1)

[Scope of utility model registration request] A cross member with a closed cross section is formed by joining an upper member and a lower member, a pipe is inserted into the joint part of this cross member, and an anchor pin with a threaded hole provided in the pipe in the radial direction is rotated. A torsion bar for a suspension device of an automobile, characterized in that an anchor arm is unrotatably fixed to the tip of the torsion bar and is inserted freely, and an anchor bolt attached to the anchor arm is screwed into a screw hole of the anchor pin. Support structure.