JPH088893Y2 - Fixing device for body side of torsion bar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a fixing device for fixing one end of a torsion bar to a vehicle body side by an anchor arm and a vehicle body member in a torsion bar spring which is a kind of vehicle suspension device. .

[Prior Art] Conventionally, as this type of fixing device, the one shown in Japanese Utility Model Laid-Open No. 60-100209 is known. In the fixing device shown in the publication, a cylindrical sleeve which is non-rotatably fitted to a torsion bar and penetrates a cross member as a vehicle body to transmit a rotational force due to a torsion of the torsion bar, and a sleeve on the outer circumference of the sleeve. The anchor arm is composed of two parts, an arm that is non-rotatably fitted to support the rotational force of the sleeve. Then, a through hole is provided in both side plates of the cross member having a substantially U-shaped cross section having an opening surface in one direction, and the sleeve is inserted from the through hole in a state where the arm is inserted from the opening surface. Anchor arm is assembled in the cross member.

[Problems to be Solved by the Invention] When the anchor arm is composed of two parts in this way, the sleeve forming the arm can be inserted from the through hole provided in the cross member, so that the diameter of the through hole can be reduced. The strength of the cross member can be improved compared to the case where a large-diameter through hole is provided, but the number of parts is increased because the anchor arm is composed of two parts, and the torsion bar is used during assembly. The workability is not good, because the three parts, the sleeve, and the arm must be fitted at the same time.

The present invention has been made to address the above-described problems, and in supporting the anchor arm in the cross member in order to improve the degree of freedom of the mounting position, does not reduce the strength of the cross member and is easy to assemble. It is an object of the present invention to provide a vehicle-body-side fixing device for a torsion bar that can improve

[Means for Solving the Problems] In order to achieve the above object, the present invention is a vehicle-body-side fixing device for a torsion bar, which fixes one end of a torsion bar provided in a vehicle suspension device to a vehicle body. A body member having a substantially U-shaped cross-section having an opening surface, holes are provided at opposite positions of both side plates, and the distance between the both side plates is wider on the opening surface side than the installation site of the holes, An anchor arm that has a tubular portion that penetrates between the holes and that fits in a non-rotatable manner with the torsion bar on the inner peripheral surface, and an arm portion that extends in the radial direction with respect to the tubular portion. It is characterized in that it is configured by a connecting tool for connecting the tip end portion of the arm portion to the vehicle body member.

[Operation and Effect of the Invention] In the present invention configured as described above, since both side plates of the vehicle body member have a divergent shape toward the end, it is possible to secure a wide space defined by the both side plates, and By inserting the tubular portion into the hole of the vehicle body member in an oblique direction, the anchor arm can be easily installed in the vehicle body member even if the holes provided in both side plates are relatively small.

Therefore, when fixing one end of the torsion bar on the vehicle body side, when supporting the anchor arm in the vehicle body member, it is possible to improve the workability of the assembly while maintaining the strength by reducing the holes provided in the vehicle body member. .

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an assembled state of a vehicle body side fixing device of a torsion bar, in which an anchor arm 2 is inserted and supported inside a cross member 1 as a vehicle body member and is engaged with the cross member 1. In order to support the rotational force of the torsion bar 4 by the swivel 3, the anchor arm 2 and the swivel 3 are connected by a bolt 5, an adjuster seat 6 and a nut 7.

As shown in the enlarged view of FIGS. 3 and 4, the cross member 1 is formed in a substantially U-shaped cross section having an opening surface in one direction, and is composed of a bottom plate 1a and side plates 1b, 1c. In the figure, the opening surface is facing downward, which is aligned with the direction when the vehicle is completed, but the assembly is performed in the upside-down state.

Anchor arm mounting holes 1d, 1e facing each other are provided on both side plates 1b, 1c, and the side plates 1b, 1c are shaped so as to spread toward the opening surface direction from the vicinity of the anchor arm mounting holes 1d, 1e. Thus forming a space 1h partitioned between the side plates 1b, 1c.

Anchor arm mounting hole 1 provided in this cross member 1
The cross member 1 supports the anchor arm 2 therein by d and 1e. The anchor arm 2 extends along the axial direction of the torsion bar 4 as shown in an enlarged view in FIGS. 5 and 6. It is composed of a tubular portion 2a extending and receiving one end of the torsion bar 4 so as not to be rotatable about the coaxial line, and an arm portion 2b extending in the radial direction of the tubular portion 2a.

Here, a serration portion 2c having a predetermined width is provided on the inner circumference of the tubular portion 2a, and the serration portion 2c is fitted with the serration portion 4a provided on the outer circumference of one end of the torsion bar 4. As a result, the anchor arm 2 and the torsion bar 4 cannot rotate. However, the anchor arm 2
The serration portion 2c of the torsion bar 4 is provided only in a certain width in the vicinity of the center in the tubular portion 2a, and the serration portion 4a of the torsion bar 4 is also provided in a predetermined width from the end of the bar. Only when the positional relationship between the bar 4 and the tubular portion 2a is within a predetermined range, both of them cannot rotate.

Since the outer diameter of the cylindrical portion 2a is slightly larger at the central portion and smaller at both end portions, the stepped portions 2d, 2
e is generated, and the distance between the step portions 2d and 2e (the width of the larger diameter portion of the tubular portion 2a) is equal to that of the side plates 1b and 1b on the bottom plate 1a side.
The spacing is the same as the spacing between c.

An arm portion 2b is fixed to the outer periphery of the tubular portion 2a at one end thereof by welding or the like, so that the entire arm portion 2b extends in the radial direction of the tubular portion 2a. The arm portion 2b is attached to the outer periphery of the large diameter portion of the tubular portion 2a, and in the present embodiment, is attached to the portion in contact with the one step portion 2e.

The other end of the arm portion 2b is bifurcated in the circumferential direction of the tubular portion 2a to form a groove portion 2f, and at a portion slightly closer to the tubular portion 2a side than the tip of the arm portion 2b, Arc-shaped notches 2g and 2h are provided in the rotation direction of the tubular portion 2a. The notches 2g and 2h and the groove portion 2f are in a positional relationship where a part thereof overlaps with each other as shown in FIG. 6, and the bolt 5 penetrates the groove portion 2f from the opposite side of the notches 2g and 2h to form the notch 2g. , 2h
The adjuster seat 6 that engages inside can be tightened.

The width of the arm portion 2b is made sufficiently narrower than the distance between the side plates 1b and 1c of the cross member 1, and even after the anchor arm 2 is penetrated between the anchor arm mounting holes 1d and 1e, the anchor arm 2b. Is movable in the axial direction of the tubular portion 2a by a certain width.

Returning to FIGS. 3 and 4, swivel mounting holes 1f and 1g are also provided on both side plates 1b and 1c of the cross member 1, and the semi-cylindrical swivel shown in FIGS. 1 and 2 is provided. 3 penetrates between the mounting holes 1f and 1g, and contacts both side plates 1b and 1c at both ends thereof. This swivel 3 has a groove formed in the arm 2b at a position slightly offset from the center.
A bolt through hole 3a is provided at a position facing 2f,
One end of the bolt 5 penetrating the bolt through hole 3a engages with the swivel 3.

The other end of the bolt 5 that penetrates the bolt through hole 3a further penetrates the adjuster sheet 6 installed between the groove portions 2f of the arm portion 2b and the notches 2g and 2h, and is fixed by the double nut 7. There is.

Here, the adjuster sheet 6 is a semi-cylindrical support member that engages the other end of the bolt 5 with the arm portion 2b in order to support the rotational force of the arm portion 2b by the swivel 3 and the bolt 5. It is shaped to fit into the notches 2g and 2h of 2b. Further, the bolt through hole 6a through which the other end of the bolt 5 penetrates is provided in the central portion thereof as described above.

Next, a method of installing the anchor arm 2 in the cross member 1 in the above configuration will be described.

First, as shown in FIG. 7, the anchor arm 2 is slanted with respect to the cross member 1 in the space 1h, and one end of the tubular portion 2a is inserted into the anchor arm mounting hole 1d. At this time, since the both side plates 1b, 1c are in a divergent shape, it is possible to insert the tubular portion 2a until one surface of the arm portion 2b substantially comes into surface contact with the side plate 1b as shown in FIG. .

When one end of the tubular portion 2a is inserted into the anchor arm mounting hole 1d until the arm portion 2b contacts the side plate 1b, the other end of the tubular portion 2a can be inserted into the anchor arm mounting hole 1e provided on the other side plate 1c. Reach a certain position. From this state, as shown in FIG. 9, while inserting the other end of the tubular portion 2a into the anchor arm mounting hole 1e, the tubular portion 2a is made parallel. If the cylindrical portion 2a becomes parallel to the bottom plate 1a, it will easily come off on the side of the anchor arm mounting hole 1e, and thereafter the arm portion 2b is returned to near the center of the cross member 1.

As can be seen from this series of operations, since the space 1h is wide, it is not necessary to enlarge these mounting holes 1d, 1e when inserting the anchor arm 2 into the anchor arm mounting holes 1d, 1e at an angle. Almost no, and it is sufficient to provide a slight play with respect to the diameter of the tubular portion 2a.

The temporary assembly of the anchor arm 2 is completed as described above, and then the torsion bar 4 is assembled.

Immediately before assembling the torsion bar 4, the anchor arm 2 is moved closer to the side opposite to the direction in which the torsion bar 4 is inserted within the cross member 1. This state is shown in FIGS. 10 and 11.

Next, while assembling the torsion bar 4, one end provided with the serration portion 4a is inserted into the tubular portion 2a. In this state, as shown in FIG. 12, the serration portion 4a of the torsion bar 4 and the serration portion 2c of the tubular portion 2 are not yet fitted. Therefore, the anchor arm 2 can freely rotate, and during actual work, since it is upside down from that shown in the figure, the arm portion 2b is in contact with the bottom plate 1a according to gravity. Although the other end of the torsion bar 4 is not shown, when a force for pushing up the wheel is applied to the suspension, the torsion bar 4 tries to rotate clockwise in FIGS. 2, 11, and 13. On the contrary, if a force to push down the wheel is applied, the torsion bar 4 tries to rotate counterclockwise in the figure.

When the assembly of the torsion bar 4 is completed, the arm 2b
(The arm portion 2b is rotated clockwise in FIGS. 2, 11, and 13), and the anchor arm 2 is moved in the direction of the torsion bar 4 at a predetermined angle with respect to the torsion bar 4. Move the serration parts 2c and 4a of both
Fit together.

As shown in FIG. 1, when the arm portion 2b moves to the left in the cross member 1, the large diameter portion of the tubular portion 2a also moves to the left. Then, when the arm portion 2b is moved to the maximum leftward, the serration portions 2c and 4a are fitted together, and the large diameter portion of the tubular portion 2a is located on both side plates 1 of the cross member 1.
It will fit exactly between b and 1c.

In this state, the swivel 3 is passed between the swivel mounting holes 1f and 1g, and the bolt 5 is passed through the bolt through hole 3a provided in the swivel 3, and the other end of the bolt 5 is provided at the tip of the arm portion 2b. Through the groove 2f. Arm part
The cutouts 2g and 2h provided in 2b face in the direction opposite to the swivel 3, and the shape of the cutout is the adjuster sheet 6.
The adjuster sheet 6 is fitted into the notches 2g and 2h while the bolt 5 is inserted into the bolt through hole 6a. The bolt 5 is provided with a thread of sufficient length, and when the nut 7 is tightened from above the adjuster sheet 6, the torsion bar 4
Is rotated counterclockwise. Since this rotation direction tends to push down the wheel, when the nut 7 is tightened, the vehicle height rises, and when the nut 7 is rotated in the loosening direction, the force for pushing down the wheel becomes weak and the vehicle height falls. Therefore, the assembly of the anchor arm 2 is completed by adjusting the tightness of the nut 7 so as to obtain the desired vehicle height.

When the tubular portion 2a is moved to the side of the torsion bar 4 so that the anchor arm 2 and the torsion bar 4 cannot be rotated, the large diameter portion of the tubular portion 2a is exactly the side plate of the cross member 1. It will be located between 1b and 1c. Further, as described above, the rotational force applied from the torsion bar 4 by pushing up the wheel is the arm portion 2b.
Is rotated clockwise, and the tubular portion 2a is pressed against the bottom plate 1a side of the cross member 1. Therefore, the tubular portion 2a
The stepped portions 2d, 2e and the side plates 1b, 1c are engaged with each other, and then the tubular portion
2a can be prevented from shifting to the left and right, and the fitting portion between the torsion bar 4 and the serration portions 4a and 2b of the anchor arm 2 will not come off.

[Brief description of drawings]

FIG. 1 is a sectional view showing an assembled state of a vehicle body side fixing device of a torsion bar according to an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a sectional view of a cross member, and FIG. A side view, FIG. 5 is a sectional view of the anchor arm, FIG. 6 is a side view of the same, FIGS. 7 to 9 are sectional views showing a procedure for inserting the anchor arm into the cross member, and FIG. 10 is a torsion bar and the anchor arm. FIG. 11 is a sectional view showing a procedure for assembling the same, FIG. 11 is a side view of the same, FIG. 12 is a sectional view of the same, and FIG. 13 is a side view of the same. Explanation of symbols 1 …… Cross member, 1a …… Bottom plate, 1b, 1c …… Side plate, 1d,
1e …… Anchor arm mounting hole, 2 …… Anchor arm,
2a ... cylindrical part, 2b ... arm part, 4 ... torsion bar, 5 ... bolt, 6 ... adjuster seat

Claims (1)

[Scope of utility model registration request] 1. A vehicle-body-side fixing device for a torsion bar for fixing one end of a torsion bar provided in a vehicle suspension device to a vehicle body, the device having an approximately U-shaped cross section having an opening surface in one direction, and both sides. A hole is provided at a position where the plates are opposed to each other, and a space between the both side plates is widened on the opening surface side from the installation site of the holes, and the torsion bar is formed on the inner peripheral surface while penetrating between the holes. An anchor arm having a tubular portion that non-rotatably fits and an arm portion that extends in the radial direction with respect to the tubular portion, and a connection that connects the tip end portion of the arm portion to the vehicle body member. A device for fixing a torsion bar to the vehicle body, which comprises: