JPS6027079Y2 - steering device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a steering device for a front two-axle type motor vehicle having a connecting link connecting slave levers for four front wheels and slave levers for front and rear wheels.

Conventionally, in this type of steering device, the connecting link has been connected to the slave levers for the four front wheels and the slave levers for the front and rear wheels via a flat journal.

However, when the frame undergoes twisting or other displacement due to the reaction force that the car receives from the road surface while driving, bending stress is generated in the connecting link, and unreasonable stress is applied to the flat journal, causing a problem that deteriorates its durability. was there.

The present invention has been devised in view of the above, and is provided in a steering device for a front two-axle type automobile having a connecting link that connects a slave lever for the front four wheels and a slave lever for the front and rear wheels. The connecting link is constructed such that the line and the axial center line of both slave levers are located on substantially the same plane, and the connecting link is connected via a spherical journal whose spherical center is located on the axial center line of the connecting link. a spacer is provided on the pin supporting the ball of the spherical journal in both the slave levers;
A steer characterized in that the spacer is configured to restrict rotation of the spherical journal.

The gist is a ring device.

According to the present invention, since the connecting link is connected to both slave levers via the spherical journal whose spherical center is located on the axial center line of the connecting link,
Bending stress acting on the connecting link can be reliably prevented, and since the connecting link's axial center line and the axial center lines of both slave levers are located on the same plane, the slave levers can be This has the effect of preventing torsional stress caused by the connecting link during rotation.

Further, according to the present invention, the pin of the spherical journal is provided with a spacer for restricting rotation of the spherical journal, which is effective in preventing excessive rotation of the spherical journal.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, reference numeral 2 denotes the frame of the automobile, 4 and 6 the four front wheels supported by the frame 2 via suspensions (not shown), and the front and rear wheels 8 and 10 respectively.
Knuckle arms 12 and 14 are connected to knuckle arms 8 and 10 at one end, respectively, and drag links 16 and 18 are pivoted at one end to brackets 20 and 22 attached to frame 2, respectively. a slave lever 24 whose other end is connected to the other ends of the drag links 12 and 14;
The booster is connected to a bracket 26 attached to the slave lever 16, and the other end is connected to the slave lever 16.

The booster 24 is connected to a link that is connected to a steering gear (not shown), and when the steering gear is operated, the booster 24 expands and contracts with hydraulic pressure, thereby rotating the slave lever 16.

28 is a connecting link that connects the slave levers 16 and 18 via a spherical journal 29 supported at both ends, and the axial center line of the slave levers 16 and 18 is approximately equal to the axial center line of the connecting link 28. They are configured to be located on the same plane.

The details of the connecting portion of the connecting link 28 to the slave lever 18 are shown in FIG. 2. A yoke 30 is formed at the end of the connecting link 28, a pin 32 is fitted into the yoke 30, and a nut (not shown) A ball 34 is fitted onto the pin 32, and the pin 3
2 and a ball 34 constitute a spherical journal 29, which is connected to the slave lever 18 by a stopper ring 36.
is rotatably supported on a spherical socket 38 fixed to the
Further, the center of the sphere 34 is configured to be located on the axial center line of the connecting link 28.

Spacers 40 and 42 are interposed between the inner surface of the yoke 30 and the ball 34, respectively, and dust seals 44 and 46 are fitted over the spacers 40 and 42, respectively.

Note that the connecting portion of the connecting link 28 to the slave lever 16 is also configured in the same manner as described above.

The spacer 42 is fitted and fixed to the pin 32 that supports the ball 34, is placed close to the slave lever 16, and is formed to have a larger diameter than the opening for the spherical journal 29 formed in the slave lever 16. The rotation of the spherical journal 29 is restricted.

According to the above configuration, both ends of the connecting link 28 are connected to the slave lever 16 via the spherical journal whose spherical center is located on the axial center line of the connecting link 28.
and 18, it is possible to reliably prevent bending stress acting on the connecting link 28, and the axial center line of the connecting link 28 and the axial center lines of the slave levers 16 and 18 are on the same plane. Since the slave levers 16 and 18 are configured to be located in the same position, it is possible to prevent the slave levers 16 and 18 from receiving torsional stress due to the connecting link 28 during rotation.

Further, according to this embodiment, one of the spacers 40 and 42 fitted to the pin 32 is formed to have a larger diameter than the opening for the spherical journal 29 formed in the slave lever 16, When the spherical journal 29 rotates, it comes into contact with the slave lever 16 to restrict the rotation, which prevents excessive deformation of the seal 46 and provides excellent durability.

In the above embodiment, the connecting link 28 is connected to the slave levers 16 and 18 via a spherical journal 29 supported at both ends, but instead of the spherical journal 29, the center of the spherical portion is connected to the connecting link 28. Even if a cantilevered spherical journal located on the axis center line is used, the same effect as in the above embodiment can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view taken along the line ■-■ in FIG. 1. 2...Frame, 12,14...Drag link, 16,18...Slave lever,
24... Booster, 28... Connecting link, 29... Spherical journal.

Claims (1)

[Scope of Claim for Utility Model Registration] In a steering device for a front two-axle type automobile having a connecting link that connects a slave lever for the front four wheels and a slave lever for the front and rear wheels, The axial center line of the slave lever is configured to be located on substantially the same plane, and the connecting link is connected to both slave levers via a spherical journal located on the axial center line of the connecting link, and the spherical journal's spherical journal is connected to the slave levers. A steering device characterized in that a spacer is provided on a pin supporting the spherical journal, and the spacer is configured to restrict rotation of the spherical journal.