JPS5984672A - Steering device of car - Google Patents

Abstract

PURPOSE:To improve the assembling property to a car by arranging a linkage member connecting a steering force to the input member of a rear wheel steering system near the side sill of a car body in a device steering both front wheels and rear wheels by the steering operation of a steering wheel. CONSTITUTION:When a steering shaft 2 is rotated by the steering operation of a steering wheel 1, a rotating force is extracted on a pitman shaft 24 and a gear shaft 35 respectively through a gear box 20, and as a result of the rotation of the pitman shaft 24 a knuckle arm 12 is rotated through a pitman arm 4, a connecting rod 5 and a tie rod 11 to steer front wheels 14. In addition, rear wheels 54 are steered by the rotation of the gear shaft 33 through an offset arm 34, a linkage link 35, etc. In this case, the linkage link 35 is arranged along the vicinity of the side sill on the right side of a car body, and the front end of an input link 41 is connected to the rear end of the link 35 through a ball joint 36. Then, the rear end of the link 41 is connected to a knuckle arm 52.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering system for a vehicle that steers front wheels and rear wheels by steering operation of a steering wheel, and particularly relates to a linkage member that connects a front wheel steering system and a rear wheel steering system. The arrangement has been devised.

A rotation take-off part is provided in the front wheel steering system such as a gear part for front wheel steering to take out the rotation necessary for steering the rear wheels, and a tricycle shaft or an offset arm is used as an output member of the rotation take-off part, and a linkage shaft or linkage Linkage i of links etc.
! l] Connecting the rear wheel knuckle arm to the above output part 4=-1, and rotating the rear wheel knuckle arm in the left and right force directions via the same quick rod, the rotary part and the swing link kit are equipped with a single-center pin. Input section 42CC is formed by connecting the above linkage section in, and Q
li, Oki's steering system that simultaneously steers the front and rear wheels so as to change the steering ratio of the front and rear wheels in proportion to the steering angle.
No. 6-118698, Tsutomu I No. 1974/17743, etc.) were submitted by the non-applicant first.

jviru steering device πCIc J,, f'L I steering the rear wheels to the front wheels and IHJ power direction by small steering angle operation of the 5 steering wheels,
In addition, by operating a large steering angle, it is also possible to steer the vehicle in the opposite direction.
When performing input operations such as turning or parking in a parking lot, the turning radius of the vehicle is improved by increasing the steering angle.

By the way, the input section of the rear wheel steering system is composed of the left and right center lines of the heavy vehicle. It is arranged so as to intersect with the left and right center line of the vehicle.

However, because the fuel tank, exhaust pipe, etc. are located near the left and right center line of the vehicle, it is difficult to place linkage members near the left and right center line of the vehicle. In
It was L.

The present invention has been made with the object of providing a complete steering system for a vehicle that does not require linkage members near the left and right center lines of the vehicle, and is therefore free from structural constraints.

In order to achieve this object, the present invention is characterized in that the linkage member is disposed along the inner side, the lower side, etc. of the side sill of the vehicle body.

Embodiments of the present invention will be described in detail below with reference to all the accompanying drawings.

1 to 4 show a first embodiment of the present invention,
FIG. 1 is a perspective view showing a schematic configuration of a four-wheeled vehicle equipped with a steering system according to a first embodiment.

The steering @2 of the steering wheel 1 is controlled by the tip of the steering wheel 1 via the universal joint 3.
Reservoir ball type front wheel steering gear box 2
0, and a hole nut 21 is fitted on the outer periphery of the tip of the steering shaft 2 via a worm, a ball circuit, and a ball as is known, and a left side V of the outer periphery of the ball nut 21 is fitted.
C is formed with a rack tooth pattern 22.

A sector gear 23 is attached to the rack teeth 22 of the ball nut 21.
The shaft 24 of the sector gear 23 constitutes the entire pitman shaft, and the base of the pitman arm 4 is fixed to the lower end of the pitman shaft 24 which projects vertically below the gear hook 20.

The right side 11 of the connecting slot 5 is pivotally connected to the tip of the pitman arm 4, and the tip of the idler arm 6 is pivotally connected to the left side of the slot 5. 6. The idler shaft 7 at the base is supported by a bearing plaque nod 8.

Tie rods 11.11 are connected to the left and right ψu11 portions of the connecting slot 5, and knuckle arms 12.12 are fully connected to the outer ends of the tie rods 11°11.
The front wheel 14.14 is mounted on the outside of the knuckle arm 12.12 [
It is supported on a protruding axle 13.13.

The front wheels are steered by operating the steering wheel 1, that is, the ball nut 21 is moved back and forth by the rotation FC of the steering shaft 2 via the worm, ball circuit, and ball.
The pitman arm 4, which is integrated with the sector gear 23 that meshes with the rack teeth 22 of the ball nut 21, swings horizontally in the left-right direction, thereby causing the connecting rod 5 and both tie rods 11°11 to move left and right, and the knuckle arm 12.12 to move left and right. The front wheels 14.14 are steered by rotating in the direction shown in FIG.

In addition, 15, 16 and 17 in the figure are shock absorbers for the front wheel 14, respectively.
These are the lower arm and radius rod.

Inside the gear box 20 of such a front wheel steering system, the steering shaft 2
A first bevel gear 31' is fixed on the outer periphery in front of the ball nut 21, and a second bevel gear 32 is meshed with this bevel gear 31.

That is, as shown in FIGS. 2 and 3, these pair of bevel gears 31 and 32ffi are orthogonally meshed, and the shaft 33 of the second bevel gear 32 is connected to the case lower wall 20a of the gear box 20.
The base of the offset arm 34 is fixedly integrated with the lower end of the shaft 33.

Then, at the tip i/N+″1 of the offset arm 34, I
J 7 long foot 7 pull link 3 which is a cage link
5 are pivotally connected to each other, and this bushing link 35 is sufficiently spaced from the left-right center line of the vehicle and is arranged in the front-rear direction approximately along the vicinity of the side sill on the right side of the vehicle body, and is connected via a ball joint 36. The front end of the input link 41 is connected to the rear end of the push-pull link 35, and the rear end of the input link 41 is protruded inwardly from the knuckle arm 52 of the right rear wheel. The knuckle arm 52 is supported by an axle 53, which projects outwardly.

Tie rods 51 and 51 are connected to the rear ends of 52, respectively,
The inner end of the tie rod 51.5i is the connecting rod 61
It is connected near the left and right ends of (.

Both ends of the connecting rod 61 are pivotally connected to the tips of idler arms 62 and 63, respectively.

Idler shaft 6 at the base of this idler arm 62.63
4.65 are supported by bearing brackets 66 and 67, respectively.

In addition, 55, 56 and 57 in the figure are the slow S devices for the rear wheel 54, respectively.
These are the lower arm and radius slot.

By the way, the ball joint 36 formed at the connection between the pusher link 35 and the input link 41 is connected and supported at the lower end of the holder arm 37, and the holder shaft 38 at the base of the holder arm 37 is connected to the bearing bracket 39. Supported.

Further, the ball joint 36 is initially set in the position shown in FIG.

That is, in a plan view, it is on the forward extension line of a straight stone connecting the vehicle body side support points pi and p2 of the lower arm 56 and radius rod 57 that constitute the suspension of the rear wheel 54, and is the fulcrum of the vertical and horizontal movement of the rear wheel 54. All of the ball joints 36 are constructed in the vicinity of the fixed point po, and are initialized in this manner.

When the steering wheel 1 is steered, the second bevel gear 32, which is orthogonally meshed with the first bevel gear 31 fixed to the steering shaft 2, rotates in a horizontally tilted manner.
The rotation is output to the offset arm 34 which is integrated with the offset arm 34.

The rotation taken from the front wheel steering system in this way is F.

Noah Nibble Link 35's Dl'' rear wheel steering f1'
The knuckle arm 5 for the right rear wheel is converted into the longitudinal movement of the input link 41 of the 2 system and is integrated with the output rod 42.
2 rotates left and right, and the right rear wheel 54 is steered, and at the same time, the tie rod 51, connecting slot 61, and tie rod '51 move left and right in order from the right. : Then, the left rear wheel knuckle arm 52 rotates left and right, and the left rear wheel 54 is also steered.

That is, with the left and right direction of the offset arm 34 set at the initial neutral position, at a small steering angle until the rotation of the offset arm 34 (d, 54 rear wheels, 1 front wheel
4, and at a large FI'e angle that exceeds the rotation, the steering is in the opposite phase.

The pull link 35, which connects the rear wheel steering system and the steering system capable of steering both the front wheels and the rear wheels with the desired steering angle function, is connected to the vehicle body fabric ((along the vicinity of the Because of this arrangement, it was possible to arrange one straight member in a rational manner without being subject to structural restrictions.

Next, a second embodiment of the present invention will be described based on FIG.

In this second embodiment, the general configuration from the front wheel steering system to the rotation input section of the rear wheel steering system is almost the same, so the numbers used for the main parts are the same as in the first example. ″1100
It is shown on a table, and its explanation will be omitted entirely, and only the different configurations will be explained below.

First, in this second embodiment, the knuckle arms 1 for the left and right rear wheels are
The rear ends of 52 and 152 are connected by one tie rod 171, and the lower ends of both knuckle arms 152 and 152 are also connected by one lower arm 172.

Radius Rondo 173. 173'ffi and connect the lateral rod 1 to the middle part near the right radius rod 173.
74 is connected.

Thus, steering of the rear wheels is performed via one tie rod 173.

In this case, one of the vehicle body side support points pi in FIG.
74 is a pivot point 175.

Further, a third embodiment of the present invention will be described based on FIGS. 6 and 7. In this third embodiment ψ11, the left and right rear wheel steering systems are configured independently, so the schematic configuration of the rotation input radical from the front wheel steering system to the right rear wheel steering system is different from that of the first embodiment. Since they are almost the same, the reference numbers of the main members are shown in the (7) 44200 series and their explanations are omitted, and only the different structures will be explained below.

First, in this third embodiment (1. Since the right rear wheel and the left rear wheel are independently constructed as separate skill systems, the thing that supports the entire rear wheel 254 is a knuckle lure L without a rond that protrudes rearward.
52, no tie rods are required.

Then, the rotation necessary for steering the left rear wheel is extracted from the idler shaft 207 of the front wheel steering system.

That is, the upper part of the idler shaft 207 of the front wheel steering system is assembled into the left rear wheel's rotation extraction cabonox 280, the sector gear 281 is integrated with the upper part of this idler shaft 207, and the sector gear 281 is engaged with a binion 282 made of a small circle. , below the pinion shaft 283, the pinion r
Offset arm 2 different from the above is attached to the lower end of Ml+ 283
The base of 84 is fixed and integrated.

The front end of a long push-pull link 285 is pivotally connected to the tip of the offset arm 284, and the push-pull link 285 is oriented approximately along the vicinity of the side sill on the left side of the vehicle body. The front end of the input link 291 is connected to the rear end of the Yupuru Rinoku 285, and the rear end of the input link 291 is the tip of the output rod 292 that protrudes inward from the knuckle arm 252 of the left rear wheel! Connect with .

The above ball joint 286 has a Holter arm 28 that supports a holder shaft 288 at the base with a bearing bracket 1i89.
It is connected and supported at the lower end of 7.

In this way, the left and right offset arms 234, 284 are symmetrically configured to the respective rear wheels 254, 251.

Then, when the steering wheel 1 is operated, the pitman arm 2
04. The sector key 281, which is integrated with the idler shaft 207, rotates through the swinging of the connector lock 205 and the idler arm 206, and the binion 282 that engages with the sector gear 281 rotates, that is, the offset arm 284, which is integrated with the binion 282, rotates. The rotation is output.

Below is Puso/Nibble Link 285, Input Link 29
1 and Outgutstrot 292. Through this, the left rear wheel knuckle arm 252 rotates left and right, and similarly to the left rear wheel 252 or the right rear wheel 252, it is independently steered in the same direction.

As described above, in the third embodiment as well, the knuckle arms for the left and right rear wheels,
Since the two pull links 235 and 285'a for independently steering the wheels 252 and 252 are arranged along the vicinity of the side sills on both sides of the vehicle body, the same effect as described above is achieved.

Incidentally, in each of the embodiments, the rotation take-off part for steering the rear wheels provided in the front wheel steering system is constructed with a hevel gear mechanism, but instead of this, it can be constructed with a ball navel mechanism, a cam mechanism, or any other arbitrary mechanism. Of course, it is okay to do so. In addition, it is not limited to the recirculated ball type front wheel steering gear, but even in the rack and pinion type, the rank axis is lengthened and the driven pinion axis is related to the rack axis near the side sill of the vehicle body, and the rear wheel steering system is This also constitutes a rack-and-binion type gear, and its rank shaft is similarly long, and the drive pinion shaft is related to the rack shaft near the side sill in the same manner as the vehicle body, and these driven pinion shafts and drive pinion shafts are connected as a linkage shaft. It is also possible to connect with

As is clear from the above description, the present invention provides a linkage section 4 which connects the output section of the rotation take-off section provided in the 01J wheel steering system and the input section of the input section of the rear wheel steering system. Because it is located roughly along the vicinity of the side sill of the engine, it is possible to rationally and rationally equip the vehicle with divine steering equipment without being subject to structural constraints due to the location of the fuel tank, exhaust pipe, etc. can.

4 The simple βi', 'gJ drawings in FIG. 11+1 show an embodiment of the present invention, and FIG. 1 is a perspective view showing the schematic configuration of a four-wheeled vehicle equipped with a steering device according to the first embodiment. ,
Figure 2 is a bottom view of the rotary take-out part, Figure 3 is the view from arrow 3 in Figure 2.
4-Schematic plan view of the rear wheel portion, FIG. 5 is a diagram similar to FIG. 1 of the second embodiment, and FIG. 6 is a diagram similar to the first wheel of the third embodiment. FIG. 7 is a plan view of the rotation take-off portion for the left rear wheel.

Top view blood 1 fd steering wheel, 14 is front wheel, 34.284 is output member, 35,285 is linkage part A2.41.2
91+ is an input part 'I')J', 52 is a rear wheel knuckle arm, and 54 is a rear wheel.

Special I "Applicant: Honda Motor Co., Ltd. Agent, Patent Attorney: TEF + Toyota Co., Ltd. Patent Attorney: Noi S. Ohashi Production Volume: Patent Attorney: Koyama Written amendment with procedures (voluntary) February 21, 1980 Commissioner of the Patent Office Wakasugi Mr. Kazuo 1, Indication of the incident, Patent Application No. 1987/1373 2,
Title of invention: Vehicle steering system 3; Relationship with the person making the amendment: Patent applicant (532): Honda Motor Co., Ltd.: 4; Agent: 5; Date of amendment order: Voluntary action: 6; Number of inventions increased by the amendment.・・3 different
Paper ``2. Claims (1) In a vehicle steering system in which the rear wheels are steered together with the 111j wheels by the steering operation V of the steered wheels, the front wheel steering system pressure is provided for rear wheel turning θ). Connect the output member of the rotation take-out part and the knuckle arm for the rear wheel to /r: the human power part (3) of the right rotation rear wheel steering system. A steering device for a vehicle consisting of an arrangement L7.

A steering system fi for a vehicle.

(3) Steering wheel steering wheel operation ((ItC with front wheels)
The rear wheel linkage part is rotated left and right by the side knuckle arm for steering the near wheels on one side of the vehicle body. The left and right manpower members are connected by a linkage section of the left and right shafts, and the right linkage member is connected to a steering/rudder device that applies force on both sides of the vehicle body. ]

Claims (1)

[Claims] Steering operation of the steered wheelsIn a vehicle steering system in which all of the rear wheels are steered along with the front wheels, the output member of the rotation take-out part of the rear wheel steering stop provided in the front wheel steering system and the knuckle arm for the rear wheels are connected to the left and right sides. A vehicle steering system comprising a linkage member that is fully connected to an input section of an input section of a rear wheel steering system that rotates σ, and is disposed near the Zydosill of a vehicle body.