JPS5950865A - Steering gear device for vehicle - Google Patents

Abstract

PURPOSE:To enable front wheels as well as rear wheels to be steered by a simple structure by making a pinion of an offset arm for steering the rear wheels mesh with a ball nut of a recirculating ball type gear box for steering the front wheels. CONSTITUTION:An end of a steering shaft 2 of a steering wheel 1 is incorporated in a recirculating ball type gear box 20 for steering front wheels through an universal joint 3. A ball nut 21 is fitted onto the outer periphery of an end of this steering shaft 2 and formed on the left side of the outer periphery with rack teeth 22 which mesh with a sector gear 23, and a pitman arm 4 for steering front wheels 12 is connected to a gear 23. Also, rack teeth 25 is formed on the right side of the outer periphery of the ball nut 21. A pinion gear 26 meshes with the teeth 25, and is mounted on an offset arm 28 which is connected to a knuckle arm 14 for steering rear wheels 16 through respective links 30, 31 and a tie rod 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering system fη for a vehicle that steers both front wheels and rear wheels by steering operation of a steering wheel. The present invention relates to a steering system for a vehicle in which the front wheel steering gear box is of the Risaki corate ball type.

The present applicant has provided a steering device for a vehicle that is capable of simultaneously steering the front wheels and rear wheels in conjunction with each other by first steering the steering wheels.

Such a steering device has a steering wheel hand movement 1i1Ti fr+J
”By steering the rear wheels in the same direction as the front wheels, the large steering angle p
'7; The design is designed to steer Q in the opposite direction or return P to the rear wheel steering angle - zero, which improves maneuverability during high-speed driving and improves Vζ. The maneuverability of the steering wheel during low-speed running can be improved, or the operability can be made as good as that of a general 111 car.

However, the front wheel steering gearbox for the tilting device was also a rack-and-binion type.

3, f, ') Circulating ball type front wheel k
Even the gearbox for 141- was designed to generate a similar steering angle function to the rear wheels, and what is its purpose? To provide a complete steering system for 41 cars that can perform the desired function by simply adding a simple structure to the recirculating ball type front wheel steering gear box.

In order to achieve such an object, the present invention has a rear wheel steering tie rod that is pivotably connected to the tip of an actuating member that is movable back and forth and whose rear end is pivotally connected to a conversion mechanism that moves a tie rod for rear wheel steering left and right. The pinion shaft is integrated into the offset art,
The above-mentioned offset arm and a binion integrated with the pole nut of the recirculating ball type front wheel steering gear box are engaged with each other.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings. FIG. 1 is a perspective view showing the general basic structure of a four-wheeled vehicle fully equipped with a steering system according to the present invention, FIG. This is the plane (2).

The steering shaft 2 of the steering wheel 1, which is steered by the driver, is assembled into a front wheel steering gear box 20 of a reservoir ball type through a joint 3'fr:.
As is known, a pole nut 21 is fitted on the outer periphery of the tip of the tlI 12 via a worm, a pole circuit, and a pole, and a rack tooth type 22 is fitted on the left side of the outer periphery of the pole nut 21.
is formed.

A sector gear 26 is attached to the rack teeth 22 of the pole nut 21.
The lower end VCi1 of the pitman shaft 24 is in mesh with the pitman shaft 24, and the base of the pitman arm 4 is fixed thereto.

At the tip of Pitman arm 4, connecting ``Jrad 5 right 11;
The tip of an idler arm 6 is pivotally connected to the end.

The idler at the base of idler arm 6 + l1h
7 is supported by a bearing bracket 8.

Left and right ψ of connecting rod 5; Vl near I11 part
, tie rod 9.9 is connected ill, tie rod 9.9
Outside 147AK has knuckle arms 10, 10 connected, front wheel 12.12 has knuckle arm, 10.10
is supported on outwardly projecting axles ii, z.

The front wheels 12 and 12 are steered by operating the steering wheel 1. That is, as the steering shaft 2 rotates, the pole nut 21 moves back and forth through the worm, ball circuit, and pole, and the rack teeth 22 of the pole nut 21 move. The pitman arm 4, which is integrated with the sector gear 26 that meshes with it, swings horizontally in the left-right direction, which causes the connecting rod 5 and both tie rods 9.9 to move left and right, and the knuckle arms 10, 1
0 rotates in the left and right direction, and the front wheels 12 and 12 are steered.

A rack tooth pattern 25 is also formed on the right side of the outer periphery of the pole nut 21 in the recirculated ball type gear box 20, and a pinion gear 26 is meshed with the rack tooth pattern 25.

That is, the pinion gear 26 is disposed on the opposite side of the pole nut 21, facing the sector gear 26, and the pinion shaft 27 is provided to hang down and protrude below the gear box 20, and the base of the offset arm 28 is fixedly fixed to the lower end of the pinion shaft 27. become

Note that the pinion gear 26 is smaller than the + lid gear 23.

There is an operating member at the tip of the offset arm 28,
The tip of a push-pull link 60 that is long in the front-rear direction is pivotally connected, and one end of a swing link 31 having a planar shape is pivotally connected to the rear heel 1 of the push-pull link 60.

The base of the swing link 61 is supported by a shaft 66 superimposed on the bracket 32-I:, and the left and right tie rods 13 and 13ffi are connected and supported at the other end of the lintaro 1.

Knuckle arms 14 are attached to the outer ends of both tie rods 13 and 13.
．． A rear wheel 16.16 is supported on an axle 15.15 that can protrude outward from the knuckle arm 14.

The gear box 20 and both brackets 8 and 32 are fixed to the insect body side.

When the steering wheel 1 is operated, the pole nut 21 in the gear box 20 moves back and forth, and the pinion gear 26 that meshes with the rank teeth 25 on the right side of the outer circumference of the pole nut 21 rotates. The rotation is output to the offset arm 28 which is integrated with the offset arm 26 .

The rotation taken out from the recirculating ball-type front wheel steering gear box 20 causes one end of the swing link 61 to swing back and forth through the back and forth and left and right swings of the butsugur link 600. Conversion by swinging the other end of the dynamic lick 61 left and right 1. Rear wheel 16.16 via tie rod 13.13 and knuckle arm 14.14ffi
The steering is made.

At this time, the rear wheels 16 are controlled with a predetermined steering angle function by the rotation of the offset arm 28, that is, by a small steering angle operation of the steering wheel 1, all the rear wheels 16 are steered in the same direction as the front wheels 12, and - universal steering is performed. In the case of angle control, the rear wheels are steered in the opposite direction, or other mechanisms are used to return the rear wheels to zero, thereby ensuring good maneuverability during high-speed driving, as well as improved steering during low-speed driving. To improve the maneuverability of wheel 1, or to
It can be made to be as good as a regular vehicle.

In the embodiment, the push-pull link 60 is used as an actuating part, but a cable, chino, etc. may be used in place of this, and the conversion mechanism is not limited to the planar swiveling arm 31, but may have other configurations. Of course, it can also be adopted as appropriate.

By the way, the second thing is to place the pinion gear 26 in a position opposite to the sector gear 23 with the pole nut 21 in between.

However, it is also possible to configure the same fllll K arrangement as described below.

As shown in FIG. 4 and No. 5N, a front wheel steering gear box 120 of the L/-L Hall type is shown in FIG.
The inner pole nut 121 is formed long in the axial direction, and a rack tooth type 12 is formed only on the left side of the outer circumference of this bolt nut 121.
2, the sector gear 123 meshes with the front half, and the pinion gear 12.6'z meshes with the rear half of the sector gear 123, and the pinion shaft 127VC:A is integrated with the offset arm 128, and the pull link 130 is connected. It is pivotally connected to the offset arm 128.

The other configurations are exactly the same as those described above, and of course the operation is also the same.

As is clear from the above description, according to the present invention, it is possible to generate a predetermined steering angle function necessary for rear wheel steering even in a vehicle equipped with a recirculating ball type front wheel steering gear box. Moreover, by simply adding a simple structure to the gearbox, it is possible to achieve the following.

[Brief explanation of drawings]

121 shows an embodiment of the present invention; FIG. 1 is a perspective view showing the general basic structure of a four-wheeled vehicle equipped with a steering system according to the present invention, and FIG. 2 is an enlarged perspective view of a gear box section. Figure 3 shows the ball inside!・A plan view of the pinion, FIG. 4 is a diagram similar to the 11th bacterium showing another embodiment,
Figure 5 shows the same meat as Figure 3. In the drawing, 1 is the steering wheel, 12 is the front wheel, 13Fi rear wheel steering tie rod, 16 is the rear wheel, 20.120 beam circulating ball type front wheel steering gear box, 21.12
1 is Paul Nat, 26.126 is Binion, 27.1
27 is the pinion shaft, 28°128 is the offset arm,
30 and 130 are operating parts, and 61 is a conversion mechanism. Patent γl Applicant: Honda Motor Co., Ltd. Agent: Patent Attorney: Yoshi Shimoda, Patent Attorney: Kunihiko Ohashi

Claims (1)

[Claims] An offset arm that rotates in conjunction with the steering wheel, a front end connected to the arm and an actuating part that can freely move back and forth, and a rear end of the actuating part that moves a tie rod for steering the rear wheels left and right. In a vehicle steering system, which consists of a conversion mechanism and which fully steers both the front wheels and the rear wheels by steering operation of the steered wheels, a binion is engaged with a hole nut of a resurgulating ball type front wheel steering gear box. A steering system for 1114 vehicles, in which the above-mentioned offset arm is integrated with the shaft of the d train.