JPH0450169Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle height adjustment device that automatically adjusts the height of an automobile body.

[Prior Art] In the vehicle height adjustment device disclosed in Japanese Utility Model Application Publication No. 58-128909, the lower end of the vehicle height adjustment bolt is inserted and supported at the end of the anchor arm, and the upper end of the vehicle height adjustment bolt is inserted into the end of the vehicle body. It is screwed into the nut of the gear box supported on the horizontal member, and the worm gear integrated with the nut is engaged with the worm shaft driven by the electric motor supported on the horizontal member, and the inclination of the anchor arm is adjusted by rotating the vehicle height adjustment bolt. and adjust the vehicle height.

In the above vehicle height adjustment device, in order to allow the vehicle height adjustment bolt to tilt due to vehicle height adjustment, the lower end of the vehicle height adjustment bolt is supported by a hemispherical elastic bush on the lower surface of the anchor arm, and the gear box is The lower surface is supported by a hemispherical elastic bushing on the cup of the upper surface of the transverse member. Since the gear box tilts together with the vehicle height adjustment bolt, the worm shaft and the shaft driven by the electric motor are connected by two universal joints and an intermediate shaft.

Therefore, when the vehicle height adjustment bolt is tilted, each elastic bushing deforms, and the durability of the elastic bushings becomes a problem. The holes in the elastic bushings become distorted due to elastic deformation and bite into the thread grooves of the vehicle height adjustment bolts, making them prone to wear.If wear powder adheres to the thread grooves of the vehicle height adjustment bolts, the threading of the vehicle height adjustment bolts and nuts may become difficult. disturbs the smoothness of the section. Since the electric motor is supported by the horizontal member, the connection structure between the vehicle height adjustment bolt and the worm shaft that tilts together becomes complicated.

[Problems to be solved by the invention] In view of the above-mentioned problems, the purpose of the invention is to support the vehicle height adjustment bolt that connects the suspension arm and the anchor arm on a log-shaped seat, and to integrate it with one of the seats. To provide a vehicle height adjustment device which is simple in construction, excellent in durability, and easy to operate, which drives a vehicle height adjustment bolt by the constructed rotational drive mechanism.

[Means for Solving the Problems] In order to achieve the above object, the structure of the present invention is such that one end of the torsion bar spring in the longitudinal direction is fixed to the swing center of the suspension arm, and an anchor is connected to the other end of the torsion bar spring. The arm protrudes above the side member of the vehicle body, and longitudinal grooves with a semicircular cross section are provided on the upper surface of the anchor arm and the lower surface of the side member, respectively, and a screw hole is provided that crosses the log-shaped sheet that engages with the groove of the anchor arm. A vehicle height adjustment bolt is screwed into the seat, the vehicle height adjustment bolt is supported in the shaft hole of a seat with a semicircular cross section that engages with a groove in the horizontal member, and an electric motor is supported on a support plate connected to the seat. It is equipped with a transmission gear mechanism on the shaft and vehicle height adjustment bolt.

[Function] A torsion bar spring is connected to the swing center of the suspension arm supporting the wheel and the anchor arm, and a semicircular groove is provided in the anchor arm and the horizontal member of the vehicle body, and each seat engaged with the groove is connected to the anchor arm. Support high adjustment bolt.

The electric motor and transmission gear mechanism that serve as the rotational drive mechanism are supported by a support plate connected to the seat, so when the inclination of the anchor arm is adjusted by rotating the vehicle height adjustment bolt, the vehicle height adjustment bolt is rotated together with the rotational drive mechanism. The log-shaped seat rotates in a semicircular groove, so there is no strain on the vehicle height adjustment bolt support or transmission mechanism.

[Embodiment of the invention] As shown in Fig. 2, a suspension mechanism using a torsion bar spring has a spindle 21 that supports a wheel.
is supported by the upper arm 20 as a suspension arm and the lower arm 22, and the upper arm 20 is supported by the lower arm 22 by a shaft 23a.
are swingably supported by a suspension member 24 via a shaft 23, respectively. One end of the torsion bar spring 25 is fixed to the swing center of the lower arm 22 together with the shaft 23 by a spline, and the other end of the torsion bar spring 25 is fixedly supported by the anchor arm 26.

In order to support the vehicle body load by the wheels, the torsion bar spring 25 is given a torsion force in advance so as to apply a rotation biasing force (spring force) in a counterclockwise direction about the shaft 23 to the lower arm 22. In order to apply a downward force to the anchor arm 26, the vehicle height adjustment bolt 28 is connected to a seat 30 engaged with the anchor arm 26 and a cross member 29 of the vehicle body.
The seat 27 is connected to the seat 27 which is engaged with the seat 27.

The vehicle height adjustment bolt 28 is screwed into the seat 30,
It is inserted into the sheet 27 so as not to come off. By rotating the vehicle height adjustment bolt 28, the inclination of the anchor arm 26 is adjusted, and the inclination of the lower arm 22 with respect to the vehicle body, that is, the vehicle height is adjusted.

As shown in FIG. 1, a groove 31 having a semicircular cross section is formed in the bottom surface of the horizontal member 29, and an elongated sheet 27 having a semicircular cross section is rotatably supported in the groove 31. A thrust bearing 36 is coupled to the lower surface of the seat 27 together with a plate-shaped support plate 35, and the base end of the vehicle height adjustment bolt 28 is supported by the thrust bearing 36. A gear 33 connected to the vehicle height adjustment bolt 28 is meshed with a gear 33a connected to a shaft 34 of an electric motor 37. The electric motor 37 is fixedly supported on the support plate 35.

A groove 3 having a semicircular cross section is also formed on the upper surface of the anchor arm 26.
2 is formed, and an elongated log-shaped sheet 30 having a circular cross section is engaged in the groove 32. The tip of the vehicle height adjustment bolt 28 is screwed into a screw hole 42 provided in the seat 30.

A vertical switch operating piece 38 is provided at the end of the anchor arm 26. The energizing circuit of the electric motor 37 is normally closed by a spring (not shown), and the switch 3 is pushed open by a switch operating piece 38.
A parallel circuit consisting of 9 and 39a, and a switch 40,
A changeover switch 44 interlocked with 41 is inserted and connected. In order to rotate the electric motor 37 in forward and reverse directions, the connections between both terminals of the electric motor 37 and the electrodes of the power battery are switched by interlocking switches 41 and 40.

Next, the operation of the vehicle height adjustment device according to the present invention will be explained. Spindle 21 of the wheel shown in FIG.
With respect to the vertical swing of the lower arm 22 that supports the
Torsion bar spring 2 integrated with lower arm 22
5 is twisted to allow the wheels to move up and down relative to the vehicle body, thereby suppressing vertical vibration of the vehicle body. At this time, the torsion torque given to the torsion bar spring 25 in advance,
It is balanced with the clockwise torsional torque about the shaft 23 of the lower arm 22 that receives the vehicle body load.

If you want to raise the vehicle height in preparation for driving on a rough road with many bumps, switch the interlocking switches 40 and 41 in Fig. 1.
When switching from the neutral position to one side, motor 3
7 is rotated, the vehicle height adjustment bolt 28 is rotated via the gears 33a and 33, and the vehicle height adjustment bolt 28 is screwed downward from the seat 30. Therefore, the distance between the seats 27 and 30 increases, the lower arm 22 is rotated counterclockwise in FIG. 2, and the height of the vehicle body relative to the spindle 21 is increased. At this time, the anchor arm 26 is attached to the torsion bar spring 2.
When the switch 5 is rotated counterclockwise in FIG. 1 together with the switch 5, the operating piece 38 hits the switch 39, and the upper limit of the vehicle height is limited. However, alternative mechanical limiting means may also be provided.

On the other hand, when lowering the vehicle's center of gravity in preparation for high-speed driving, by switching the switches 40 and 41 to the opposite side, the electric motor 37 is reversed and the vehicle height adjustment bolt 28 is
spirals upward from the seat 30. Therefore,
The distance between the sheets 27 and 30, i.e. the transverse member 29
The distance between the lower arm 22 and the anchor arm 26 becomes narrower, the initial torsion load of the torsion bar spring 25 is reduced, the inclination angle of the lower arm 22 becomes smaller, and the height of the vehicle body relative to the spindle 21 becomes lower. At this time, when the operating piece 38 hits the switch 39a, the electric motor 37 is stopped and the lower limit of the vehicle height is restricted.

In the embodiment shown in FIG. 3, a worm gear mechanism is used as the transmission gear mechanism instead of a spur gear mechanism. In other words, the vehicle height adjustment bolt 28
A worm gear 18 is connected to the lower end of the worm gear 18, while a worm shaft 19 is supported on the shaft of an electric motor 37 fixedly supported on a support plate 35, and the worm shaft 19 is meshed with the worm gear 18. The other configurations are the same as those in the embodiment shown in FIG. 1, and similar members are given common reference numerals and explanations will be omitted.

Also in this embodiment, the torsion bar spring 2
The initial torsional load of No. 5 is determined by the vehicle height adjustment bolt 28 that regulates the distance between the vehicle body transverse member 29 and the anchor arm 26 coupled to the torsion bar spring 25. The rotation of the vehicle height adjustment bolt 28 causes the transverse member 29 to If the distance between the anchor arm 26 and the anchor arm 26 is widened, the vehicle height will be increased, and if the distance is narrowed, the vehicle height will be decreased.

[Effects of the invention] As described above, the present invention fixes one end of the torsion bar spring in the longitudinal direction to the swing center of the suspension arm, and projects the anchor arm connected to the other end of the torsion bar spring above the horizontal member of the vehicle body. , a longitudinal groove with a semicircular cross section is provided on the upper surface of the anchor arm and the lower surface of the side member, and a vehicle height adjustment bolt is screwed into a screw hole that crosses a log-shaped sheet that engages with the groove of the anchor arm. The vehicle height adjustment bolt is supported in the shaft hole of the seat with a semicircular cross section that engages with the groove of the horizontal member.
An electric motor is supported on a support plate connected to the seat, and a transmission gear mechanism is attached to the shaft of the electric motor and the vehicle height adjustment bolt, and a log is installed at the connection of the vehicle height adjustment bolt to the horizontal member of the vehicle body and the anchor arm. The height adjustment bolt can be tilted smoothly because of the shaped seat.
Durability is improved.

The rotational drive mechanism of the vehicle height adjustment bolt is integrally supported by one log-shaped seat, so when the vehicle height adjustment bolt is tilted as the anchor arm is tilted, the rotational drive mechanism is also tilted integrally and the log-shaped seat is integrally supported. The shaped seat rotates in a semicircular groove, so it operates smoothly, and there is no strain on the support part of the vehicle height adjustment bolt or the transmission mechanism, and the structure is simple and has excellent durability.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing the main parts of the vehicle height adjustment device according to the present invention, Fig. 2 is a perspective view showing an outline of the same vehicle height adjustment device, and Fig. 3 is a partially modified embodiment of the present invention. FIG. 2 is a front sectional view showing the main parts of the vehicle height adjustment device. 20...Atsupa arm, 22...Lower arm,
25...Torsion bar spring, 26...Anchor arm, 27, 30...Seat, 28...Vehicle height adjustment bolt, 29...Horizontal member, 33...Gear, 35...
...Support plate, 37...Electric motor.

Claims (1)

[Scope of utility model registration request] One end of the torsion bar spring in the longitudinal direction is fixed to the swing center of the suspension arm, and the anchor arm connected to the other end of the torsion bar spring is projected above the cross member of the vehicle body, and a cross section is formed on the upper surface of the anchor arm and the lower surface of the cross member. A seat with a semicircular cross section is provided with circular grooves in the front and rear directions, and a vehicle height adjustment bolt is screwed into a screw hole that crosses the log-shaped seat that engages with the groove of the anchor arm, and engages with the groove of the horizontal member. A vehicle height adjustment device comprising: a vehicle height adjustment bolt supported in a shaft hole of the seat, an electric motor supported on a support plate coupled to the seat, and a transmission gear mechanism provided on the shaft of the electric motor and the vehicle height adjustment bolt.