JPS6143215B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle body stabilizing device for an automobile.

Generally, curved sections of expressways are sloped to prevent the vehicle body from leaning outward when driving on a curve, but since the road surface on ordinary roads is flat, it is difficult to turn the steering wheel suddenly. In such cases, there is a risk that the vehicle body may lean significantly and fall.

Therefore, the present invention has been developed to create a highly maneuverable automobile that raises one side of the vehicle body only when the steering wheel is suddenly turned, thereby achieving an effect similar to that of creating a slope on the road surface. The purpose is to provide a vehicle body stabilization device.

Hereinafter, the configuration of the present invention will be explained based on the accompanying drawings.

In general, automobile suspension (suspension system)
There are many types, but the ones shown in Figures 3 and 4
The figure shows a strut-type independent suspension system that independently supports each wheel.

The suspension system includes a strut 1, and wheels 2 are supported at the bottom of the strut 1. Between the strut 1 and the frame aggregate 3 of the car body,
A frame aggregate lifting cylinder 4 is attached, and when hydraulic pressure is supplied to an upper chamber 6 defined by a piston 5 of the cylinder 4, the frame aggregate 3 is raised.

Each of the frame aggregate lifting cylinders 4 is
In conjunction with the turning operation of the handle 7, for example, when the handle 7 is rapidly rotated to the left, the front and rear cylinders 4 disposed on the right side of the vehicle body are activated simultaneously to raise the frame aggregate 3.

FIG. 1 shows a hydraulic circuit in which each cylinder 4 is actuated by rotating the handle. When the handle 7 is rotated, the rotation is caused by the pinion 8 in the axial direction of the rack rod 9. This is converted into a linear motion, and the left pressure cylinder 10a and right pressure cylinder 10b connected to both ends of the rack rod 9 operate in opposite directions.

The pressure fluid outlet of each pressurizing cylinder 10a, 10b and the tank 11 having a pressure accumulation function are connected by a left return pipe 12a and a right return pipe 12b,
A throttle valve 13 and a check valve 14 are connected in parallel to each of the return pipes 12a, 12b.

Note that the check valve 14 is connected to the pressurizing cylinder 1.
This prevents the pressurized fluid formed by the actuation of 0a and 10b from flowing into the tank 11.

The upper chamber 6 of the front and rear frame aggregate lifting cylinders 4 disposed on the left and right sides of the vehicle body and the tank 11 are connected by a left supply passage 15a and a right supply passage 15b, and each supply passage 15a, 15b has a A pressure generator 16 for pumping the fluid in the tank 11 is provided in association with each supply path 15a, 15b.

The pressure generating device 16 is configured to drive a hydraulic pump 18 with a motor 17, and when the hydraulic pump 18 is driven, oil in the tank 11 flows through a check valve 19 to a supply path. A pressure detector 20 is connected to the outlet side of the check valve 19, and the pressure of the oil flowing into the supply path is the set pressure (the pressure required to raise one side of the vehicle body).
When the pressure exceeds the pressure, the pressure detector 20 is activated, the safety valve 21 linked thereto is opened, and the oil pumped by the pump 18 is returned to the tank 11.

Liquid supply switching valves 22a and 22b are connected to the left side supply path 15a and the left side supply path 15b, respectively, and a tuning valve 23 is connected to the outlet side of the switching valve.
is installed. Liquid supply switching valve 22a, 22
b operates in conjunction with the left pressure cylinder 10a and the right pressure cylinder 10b, which are operated by the rotation of the handle 7, to operate these cylinders 10a, 10b.
It is switched to the open state by the pressure fed from 10b, and is normally kept in the closed state.

The switching pressure of the liquid supply switching valves 22a and 22b is as follows:
The flow also flows through a branch passage 24 communicating with the tank 11, and the elasticity of the spring 26 of the relief valve 25 connected to the branch passage 24 is applied to the switching valve 22a,
22b becomes stronger than the spring 27, and the switching valve 22
When a and 22b are switched to the open state, the branch passage 24
The relief valve 25 is switched to the open state by the pressure of the oil flowing through the valve.

The outlet sides of the liquid supply switching valves 22a, 22b communicate with the tank 11 via drainage pipes 28a, 28b, and normally open drainage switching valves are provided in the drainage pipes 28a, 28b. 29a, 29b operate in the opposite direction to the liquid supply switching valves 22a, 22b, and when the liquid supply switching valves 22a, 22b are switched to the open state, the draining switching valves 29a, 29b are closed. It is designed to change the state.

As a switching mechanism for the drainage switching valves 29a and 29b, as shown in FIG.
An engagement pin 33 is inserted into this hole 32, and an engagement pin 33 is inserted into this hole 32.
A spring 34 is provided for engaging the tip of the lever with the rack teeth 9' of the rack rod 9, so that the swing arm 31 swings when the rack rod 9 is moved in the axial direction by rotation of the handle shaft 7'. The mounting position of the detector 35 is regulated so that the detector 35 is activated when the swing arm 31 swings in one direction, and a detection signal from the detector 35 is used to control the drainage switching valve 29.
a and 29b are switched.

The vehicle body stabilizing device according to the present invention has the above-mentioned structure, and its operation will be explained next.

Now, when the handle 7 is slowly rotated in the direction of the arrow in FIG. 1, the rack rod 9 moves in the direction of the arrow in FIG. The oil in the tank 11 flows into the right pressure cylinder 1.
The piston 0b moves forward and pressurized fluid is pushed out from the fluid outlet.

The flow rate of the pressurized fluid pushed out from the right pressurizing cylinder 10b is related to the rotation speed of the handle 7,
As mentioned above, when the handle 7 is rotated slowly, the pressurized fluid flows from the throttle valve 13 through the right return pipe 12b and returns smoothly into the tank 11. Switching valve 22
b is kept closed, while the left supply path 15a
The liquid supply switching valve 22a is also maintained in a closed state because no switching pressure is applied thereto. Therefore, the oil discharged from the hydraulic pump 18 by the operation of the pressure generator 16 is transferred to the frame aggregate lifting cylinder 4.
However, the attitude of the car body due to the change in direction of the car is only slightly tilted on the outside due to the centrifugal force.

By the way, when the handle 7 is rapidly rotated in the direction of the arrow in FIG. However, since the flow rate pushed out from the fluid outlet is larger than the amount passing through the throttle valve 13, switching pressure acts on the fluid supply switching valve 22b provided in the right supply path 15, and the switching valve 22b is switched from closed to open, and after switching of this switching valve 22b, the relief valve 25 is opened, and the high-pressure fluid flows through the branch pipe 24 opened by this relief valve 25. It flows into the tank 11. Therefore, the oil discharged from the pump 18 of the pressure generating device 16 flows through the right supply path 15b opened by the fluid supply switching valve 22b, and flows through the frame aggregate lifting cylinder 4 disposed on the right side of the vehicle body. It flows into the upper chamber 6. Therefore, the vehicle body on the opposite side of the steering wheel 7 is lifted by the operation of the lifting cylinder 4, so the posture of the vehicle body when driving on a curve is almost the same as when driving on a sloped road surface. maintained and can be driven safely.

Note that when the handle 7 is turned in the direction of the arrow in FIG. 1 to move the rack rod 9 to the right side in FIG. 1, the swinging arm 31 swings and moves away from the detector 35.
In response to the detection signal from the detector 35, the drain switching valve 29b is switched to the closed state, and the pressure fluid flowing inside the right supply path 15b does not flow into the tank 11 from the drain pipe. do not have.

Furthermore, after rounding a curve, when the handle 7 is turned in the opposite direction as described above to return to the state when traveling straight, the liquid supply switching valve 2 of the right side supply path 15b
2b is switched to the closed state by the elasticity of the spring 27, and the swinging arm 31 swings due to the leftward movement of the rack rod 9 in FIG. In response to the detection signal, the drainage switching valve 29b returns to the open state. Therefore, the oil in the upper chamber 6 of the lifting cylinder 4 is removed from the draining switching valve 2.
The liquid returns to the tank 11 through the drain pipe 28b opened by the drain pipe 9b, and the vehicle body is held in a horizontal state.

The suspension system for the wheels 2 is shown in Figs. 3 and 4.
For example, FIGS. 5 and 6
A suspension device employing a leaf spring 36 as shown in the figure may also be used. In this case, chassis 3
A pair of lifting cylinders 4 are attached front and back to both sides of the cylinder 7, and the end of an arm 38 connected to the piston rod 5 of each cylinder 4 is connected to the chassis 37 by a shaft 39.
Attach the leaf spring 3 with the arm 38 above.
The end portions of the cylinders 6 are supported to allow oil pumped from the pump 18 to flow into the upper chamber of each cylinder 4.

In addition, the lifting cylinder 4 can be attached either to the frame aggregate 3 as shown in the illustration or to the suspension device 1. When the cylinder 4 is attached to the suspension device 1, the cylinder 4 is Allow oil to flow into the chamber.

As described above, according to the present invention, when the handle is rapidly rotated, the pressure fluid discharged from the pressure generator flows into the lifting cylinder provided between the frame aggregate and the suspension device, and the handle is turned. By raising the opposite side, when driving around a curve on a general road, you can obtain the same effect as adding a slope to the road surface, and if you turn the steering wheel slowly, the lifting cylinder will not operate. ,
The vehicle body only tilts to a certain extent due to centrifugal force, which has a significant effect on improving maneuverability when driving around curves.

Furthermore, since the internal pressure of a tank with a pressure accumulation function acts inside each lifting cylinder that supports the vehicle body, each lifting cylinder is activated instantly by the inflow of pressurized fluid discharged from the pressure generator. and can exhibit excellent responsiveness.

[Brief explanation of the drawing]

FIG. 1 is a hydraulic circuit diagram of a device according to the present invention;
Figure 2 is an enlarged cross-sectional view of the pressurizing cylinder portion of the same as above;
FIG. 3 is a front view showing the mounting part of the above suspension system, FIG. 4 is a partially cutaway front view enlarging a portion of FIG. 3, and FIG. 5 is a side view showing another example of the above suspension system. FIG. 6 is a side view showing the operating state of FIG. 5. 2...Wheel, 3...Frame aggregate, 4...Elevating cylinder, 7...Handle, 10a...Left pressure cylinder, 10b...Right pressure cylinder, 11
...Tank, 12a...Left return pipe, 12b...
... Right side return pipe, 13 ... Throttle valve, 15a ... Left side supply path, 15b ... Right side supply path, 16 ... Pressure generator, 22a, 22b ... Liquid supply switching valve, 2
8a, 28b...Drainage pipe line, 29a, 29b...
Drainage switching valve.

Claims (1)

[Claims] 1. A cylinder for raising and lowering the frame aggregate is provided between the frame aggregate and the attachment part of the suspension device that supports each wheel to the frame aggregate, and a cylinder for raising and lowering the frame aggregate is provided between the frame aggregate and the attachment part of the suspension device that supports each wheel, and a left side lever that operates in opposite directions in conjunction with the turning operation of the handle is provided. The pressurized fluid discharge ports of the pressure cylinder and the right pressurized cylinder are connected to a tank having a pressure accumulation function through a left return pipe and a right return pipe, and a throttle valve is installed in each pipe.
The front and rear frame aggregate lifting cylinders placed on the left and right sides of the vehicle body are connected to the tank through a left supply path and a right supply path, and a pressure generating device is provided to pump fluid in the tank to each supply path. , a normally closed liquid supply switching valve that is switched by the pressurized fluid generated by the left pressure cylinder and the right pressure cylinder is connected to each of the above supply channels, and the outlet of each liquid supply switching valve is connected to each of the above supply channels. A vehicle body stabilizing device for an automobile, wherein a normally open type drainage switching valve that operates in a direction opposite to the fluid supply switching valve is provided in a drainage pipe line that communicates between the side and the tank.