JPS6142805B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a spring load setting device for a front wheel suspension system that utilizes the spring action of a torsion bar.

Some front wheel suspension systems for automobiles utilize the torsion spring action of torsion bars. In this structure, one end of the torsion bar is connected to the lower arm of the front wheel suspension system, a predetermined torsion force is applied to the torsion bar, and the reaction force is used as a spring action. The conventional method of applying torsion force, that is, spring load, to this torsion bar is to pivot the anchor bolt to an anchor arm fixed to the other end of the torsion bar, and tighten the anchor bolt to the cross member of the frame with a nut. However, the tightening amount was set accordingly. In other words, the amount by which the anchor bolt protrudes from the surface of the cross member is first measured, and the load is determined by how many millimeters the anchor bolt protrudes from that position by tightening the nut. Therefore, since the spring load is set by visual measurement, it is not possible to obtain a uniform setting, and different loads are required depending on the vehicle type, which makes the work complicated and takes a lot of time, which has a negative impact on work efficiency. This was counterproductive.

The present invention was provided in order to solve the above-mentioned conventional problems, and its features relate to a completely new device that can obtain highly accurate spring load settings in an extremely short period of time through mechanical and electrical control. It is something.

Embodiments of the present invention will be described below with reference to the drawings. The front wheel suspension system using torsion bars is mounted on frame 1.
Atsupa arm 15 pivotally connected to 3 and frame 13
A knuckle 17 is attached to a lower arm 16 which is pivotally connected to the front lower arm 16 via a support 14, and one end of a torsion bar 18 is connected to the front lower arm 16. Further, an anchor arm 19 is fixed to the other end of the torsion bar 18, and an anchor bolt 20 is pivotally fixed to this. The anchor bolt 20 is tightened and fixed to the cross member 22 of the frame 13 by a nut 21.

The present invention applies a torsion force to the torsion bar 18 and automatically and accurately sets the spring load of the reaction force.

Its configuration is arranged on a machine stand, which is not shown. That is, 1 is a reference seat that supports the frame 13 and required cross members, and a clamp 7 for fixing the frame 13 supported by the reference seat 1 is disposed at an appropriate position. The clamp 7 is automatically operated by a fluid pressure cylinder.

Furthermore, a spring load detection device is installed at the bottom of the knuckle 17. This spring load detection device includes a fluid pressure cylinder 2, a load cell 3 built into the piston rod of the fluid pressure cylinder 2, and a measurement adapter 4 that abuts the lower end of the knuckle 17.
It is composed of:

In addition, a fluid pressure cylinder 5 that applies a torsion force to the torsion bar 18 is attached to the lower part of the anchor arm 19 fixed to the other end of the torsion bar 18.
Set up. A pushing member 6 that comes into contact with the anchor arm 19 is attached to the piston rod end of the fluid pressure cylinder 5.

8 is a hydraulic unit that supplies and discharges hydraulic pressure to the fluid pressure cylinder 5, and 9 is a switching valve thereof. 10 is a control panel, 11 is a torsion bar load setting device, and 12 is an operation panel.

Since the present invention has the above configuration, the frame 13 with the anchor bolts 20 set (temporarily fixed) on the cross member 22 is carried onto the reference seat 1 of the machine base and fixed with the clamp 7. . The fluid pressure cylinder 2 is actuated by the clamp completion signal, and the measurement adapter 4 is brought into contact with the lower end of the knuckle 17, completing preparations for detecting the spring load of the torsion bar 18. Based on this detection preparation completion signal, the switching valve 8 is switched to operate the fluid pressure cylinder 5, and the anchor arm 19 is pivoted by the pushing member 6. A torsion force is applied to the torsion bar 18 by the rotation of the anchor arm 19, and the reaction force, that is, the spring load, is detected by the load cell 3, and when it reaches a predetermined spring load setting value, the fluid pressure cylinder 5 The pushing motion of the anchor arm 19 by the anchor arm 19 stops. At this time, by tightening the nut to the point where the anchor bolt 20 protrudes, a predetermined spring load is set on the torsion bar 18.

Therefore, by pressing the setting button for the desired spring load value arranged on the torsion bar load setting device and pressing the operation panel 12, you can clamp the frame carried into the machine, set the spring load of the torsion bar, and unclamp it. The work is done automatically,
Only when tightening the nut 19 of the anchor bolt 20 is the worker using a torque wrench to obtain the load setting for the torsion bar.
Completes in just 30 seconds.

As described above, with the device of the present invention, the spring load setting of the torsion bar of the front wheel suspension system is automatically performed mechanically and electrically, and can be achieved in a short period of time, which significantly improves work efficiency. There is an advantage that the required spring load setting according to the type of spring can be immediately and accurately obtained by operating the setting button.

[Brief explanation of the drawing]

The figure is a main structural diagram of the device of the present invention. 1...Reference seat, 2...Fluid pressure cylinder, 3...
... Load cell, 4 ... Measurement adapter, 5 ... Fluid pressure cylinder, 6 ... Pushing member, 18 ... Torsion bar, 19 ... Anchor arm, 20 ... Anchor bolt, 21 ... Nut, 22 ... Cross member.

Claims (1)

[Claims] 1 A device that sets a spring load on the torsion bar of a front wheel suspension system using the spring action of the torsion bar, and includes a reference seat and locking device for fixing the frame to the machine base, and a measuring adapter that comes into contact with the lower end of the knuckle. , a front wheel suspension consisting of a spring load detection device consisting of a hydraulic cylinder that incorporates a load cell, and a fluid pressure cylinder device that comes into contact with an anchor arm fixed to a torsion bar and applies a torsion force to the torsion bar. Device spring load setting device.