JPH048270B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle steering device equipped with a positioning structure.

In practice, it is quite difficult to insert a cylinder into a circular hole provided in a fixing member or the like, accurately position the cylinder by a predetermined insertion depth, and support the cylinder within the circular hole. This is the same in the case of a cylinder, and it is therefore awaited to realize a structure that allows the above-mentioned positioning to be performed easily and accurately.

The present invention has been made in response to this problem, and its purpose is to provide a positioning piece such as a tongue piece formed protruding in the outer radial direction at the end of the outer periphery of a cylinder or a cylindrical member. The piece accurately determines the predetermined insertion depth of the cylinder and columnar member into the circular hole.
Moreover, by introducing a positioning structure of a cylinder and a cylindrical member that allows easy positioning into the vehicle steering system, the shaft holder with the shaft of the rear wheel steering mechanism installed therein can be inserted into the cylindrical shaft holder support member. The purpose is to determine its position.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings, along with a general configuration of a vehicle steering system that employs a positioning structure according to the present invention. The vehicle steering system described below steers the rear wheels in the same direction as the front wheels by operating a small steering angle of the steered wheels, and in the opposite direction by operating a large steering angle, or in the latter case, by changing the steering angle of the rear wheels. It constitutes a steering angle function generation mechanism that returns it to zero.

1 to 4 schematically show the steering system of a vehicle. Reference numeral 1 denotes a steering wheel, which is a handle. The steering rotation of this 1 is caused by the left-right movement of a tie rod 4 for steering the front wheels 3 via a steering gear 2. The front wheels 3 are steered by the rotation of the knuckle arm 5 connected to the outer end of the tie rod 4. The members from the steering wheel 1 to the tie rod 4 described above constitute a front wheel steering mechanism.

On the other hand, a linkage member 6 is led out rearward from the steering gear 2, and a rear wheel 26 is attached to the rear end of the linkage member 6.
A shaft member 7 constituting a steering mechanism is connected thereto. A crank portion 8 is provided at the rear end of the shaft member 7, and its crank pin 9 is formed to protrude rearward, and the shaft member 7 has a shaft holder 1 which is a cylindrical member that rotatably supports the shaft member 7.
0 and is inserted into and supported within the shaft collar 11 which is also cylindrical.

Bracket 1 of lower arm 12 for rear wheel in Fig. 3
3, the shaft collar 11 fixed as shown in FIG. 5, and the shaft holder 10 positioned and inserted and supported in the shaft collar 11 in a manner described later, as shown in FIG. 6 when viewed from the opposite side. Two rubber bushings 14 and 15 are interposed between the front and rear. In the illustration, the direction in which the cross section of the shaft collar 11 is shown is reversed in FIGS. 5 and 6.

Further, the crank pin 9 of the crank portion 8 provided on the shaft member 7 has a joint member 1 which is approximately inverted T-shaped from the front.
6 is loosely fitted into the joint member 16, and left and right rear wheel steering tie rods 17, 17 are connected to the joint member 16, and an arm member 19 pivotally supported by a link member 18 suspended from the vehicle body is tied to the joint member 16. There is. From the shaft member 7 to the rear wheel steering tie rod 1
The members 7 and 17 constitute a rear wheel steering mechanism.

Next, the positioning structure according to the present invention will be described.

As shown in FIG. 7, a cylindrical shaft collar 11
A mounting seat portion 20 is formed on the outer periphery of the rear end, and the mounting seat portion 20 has three mounting pieces radially in the outer diameter direction, that is, one mounting piece 20a on the lower side and one piece 20b, 20b on the left and right upper sides. are doing.

A positioning piece 21 is formed on the rear outer periphery of the shaft holder 10, which is a cylindrical member inserted into the shaft collar 11, and the positioning piece 21 consists of three radial pieces 21a.

In this embodiment, a positioning large diameter portion 22 is configured in the rear half of the rear rubber bush 15,
The large diameter positioning portion 22 is formed sufficiently larger than the positioning piece 21 of the shaft holder 10, and an engagement groove 22a having the same shape as the positioning piece 21 is formed on the inner periphery of the large diameter portion 22. The outer shape has three radial cutouts 22b.

Positioning large diameter portion 2 of such rear rubber bush 15
2 is housed in a recess 24 of the same shape that protrudes rearward and is formed in the center of a mounting member 23 having three radial mounting pieces 23a.

Then, the front rubber bushing 14 is attached to the outer periphery of the tip of the shaft holder 10, and the holder 1
Attach the rear rubber bush 15 to the outer circumference of the rear part of the 0 in the following manner.

The positioning piece 21 provided on the outer circumference of the rear portion of the shaft holder 10 is fitted into the engagement groove 22a formed on the inner circumference of the large diameter positioning portion 22 of the rear rubber bush 15.
At this time, since the engagement groove 22a has the same shape as the positioning piece 21, the holder 10 and the bush 15 do not rotate relative to each other.

In this way, the mounting member 23 is applied from the rear of the holder 10 with the bushings 14 and 15 mounted thereon, that is, the shaft holder 10 is attached to the shaft collar while the rear rubber bushing 15 is accommodated in the recess 24 formed in the center of the mounting member 23. 11 from the rear. At this time, the positioning piece 21 of the shaft holder 10
Since the rear rubber bush 15 abuts against the mounting seat 20 of the shaft collar 11 through the positioning large diameter part 22, positioning by a predetermined insertion depth can be easily and reliably performed.

Thereafter, the mounting pieces 23a of the mounting member 23 and the mounting pieces 20a, 20b of the shaft collar 11 are connected with bolts 25, respectively, while pressing the positioning large diameter portion 22 in the thrust direction. The shaft collar 11, the front rubber bush 14, the rear rubber bush 15, and the mounting member 23 constitute a shaft holder support member.

The above positioning state is shown in FIG.

By the way, in this embodiment, the positioning piece 21 is composed of radial pieces 21a, and the positioning large diameter portion 22 of the rubber bushing 15 is also formed in a radial outer peripheral shape, and its engagement groove 22a is also formed in the same shape as the positioning piece 21. Furthermore, since the concave portion 24 of the mounting member 23 has the same shape as the positioning large diameter portion 22, the collar 11
The rotation of the holder 10 after being inserted and assembled is prevented, and therefore the positioning of the holder 10 in the circumferential direction can also be performed.

Since the gist of the present invention is to provide a positioning piece, it is not necessarily necessary to have a radial configuration as in the embodiment, and the attachment of rubber buttons is optional. It can also be implemented in the same way.

As is clear from the above, according to the present invention, the mounting seat is provided on the cylindrical shaft holder support member, and the positioning piece is provided on the outer periphery of the cylindrical member. Accurate positioning can be easily performed. Therefore, when assembling the shaft holder in which the shaft of the rear wheel steering mechanism is installed, accurate positioning can be easily performed using the positioning piece of the shaft holder.

The assembly accuracy of the rear wheel steering mechanism is reflected in the operational accuracy of the steering mechanism, which not only contributes to the operability of the vehicle but also to the durability of the steering mechanism.

As described above, the present invention has the great effect of improving the operability of the vehicle and improving the durability of the steering mechanism at low cost by providing the positioning piece on the shaft holder.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an explanatory plan view of a vehicle showing an outline of a steering system embodying the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a rear view of the same. , FIG. 4 is an enlarged perspective view showing the configuration of the main parts of the steering device, FIG. 5 is a vertical cross-sectional side view showing an example of the part for inserting and supporting the cylinder and the cylindrical member, and FIG. 6 is a part of the inserted and assembled state. FIG. 7 is a broken side view, FIG. 7 is an exploded perspective view thereof, and FIG. 8 is an enlarged longitudinal sectional view of the positioning structure according to the present invention. In the drawing, 1 is a steering wheel, 3 is a front wheel, 6 is a linkage member, 7 is a shaft member, 10 is a shaft holder (cylindrical member), 21 is a positioning piece, 1, 2, 4
is front wheel steering mechanism, 7, 8, 9, 16, 17, 1
8, 19 are rear wheel steering mechanisms, 11, 14, 15, 2
0 and 23 are shaft holder support members, and 20 is a mounting seat.

Claims (1)

[Scope of Claims] 1. A front wheel steering mechanism that steers the front wheels and a rear wheel steering mechanism that steers the rear wheels are connected via a linkage member, and the rear wheel steering mechanism controls the steering angle of the rear wheels. In a steering system for a vehicle, the shaft holder rotatably supports a shaft member that inputs the information, and the rear wheels as well as the front wheels are steered by steering operation of the steering wheel. The shaft holder is fitted into a cylindrical shaft holder support member having a positioning piece protruding in the radial direction and having a mounting seat that abuts the positioning piece, and the shaft holder support member regulates the longitudinal position of the shaft holder. What is claimed is: 1. A vehicle steering device equipped with a positioning structure, characterized in that the steering device is supported by a positioning structure.