JP3151354B2 - Device for driving and steering the wheels of a car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor vehicle, in particular, a heavy-duty vehicle (motor vehicle designed to withstand heavy loads).
Device for driving and steering wheels of a vehicle.

[0002]

2. Description of the Related Art Conventional automobiles, especially heavy duty vehicles, have a considerably high frame height due to their conventional chassis and chassis suspension structure. For example, a conventional rigid shaft requires a large space around the longitudinal axis of the vehicle, that is, the central region of the vehicle. As a result, especially when the diameter of the wheels or tires is large, the height of the vehicle frame above the ground has been significantly increased due to the large damping travel inherent in the rigid shaft.

Similarly, the conventional distribution shaft means requires a large space around the longitudinal axis of the vehicle, that is, in the center region of the vehicle, since the universal joint shaft must be guided to the driven wheel. This, too, has caused the height of the vehicle frame above the road surface to be significantly higher when using conventional distribution shaft means.

[0004] Vehicles that must be used on site or have to pass through the entrance of a workshop, especially heavy duty vehicles, have a limited overall height, as do vehicles that must run on roads, under bridges, or in tunnels. You. This means that increasing the available car height, that is, the height above the car frame, is roughly by reducing the car frame height (from the ground) by that much. The only effect that can be achieved.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a method of suspending a wheel, in which the height of the frame can be made as low as possible in order to increase the height of the part above the frame of a motor vehicle, in particular a heavy duty vehicle. It is an object to provide a device for driving and steering.

[0006]

SUMMARY OF THE INVENTION The invention makes it possible to greatly reduce the height of a frame by means of an innovation in the basic concept of suspension and drive of the wheels of a motor vehicle, in particular a heavy-duty vehicle.

An object of the present invention is to provide a buffer cylinder which is guided by a link including an outer cylinder and an inner cylinder and provided with a hydraulic oil passage at the center thereof, a shift transmission connected to the hydraulic oil passage and a shift transmission. A hydraulic motor housed within the axle support device and disposed near the hub of the wheel, wherein the lower end of the outer cylinder of the cushion cylinder is rigidly connected to the axle support device, and The apparatus according to the present invention, characterized in that the upper end of the inner cylinder is supported so as to be movable in three dimensions by an elastic bearing fixed to a cross member supported by a support member extending from the frame. Achieved.

As described above, according to the present invention, since neither a rigid shaft nor a universal joint shaft is required, the height of the vehicle frame can be considerably reduced.

It is preferable that two lateral links are supported at the wheel end at the bottom of the axle support device and at the other end rotatably at the bottom of the frame. The ends of the two lateral links on the wheel side may be joined to each other.

[0010] Preferably, a turning link is attached to the outer cylinder of the shock-absorbing cylinder, and the turning link supports a connecting rod having a spherical head.

The shift transmission may be provided so that it can be shifted in two stages.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, the wheels R of a motor vehicle including an axle 13 are held on an axle support 7 and guided with the aid of a shock-absorbing cylinder and a lateral link 3. The buffer cylinder includes an inner cylinder 1a and an outer cylinder 1b. The inner cylinder and the outer cylinder are axially movable relative to each other, and are rotatably provided.

A hydraulic oil supply comprising two sealed coaxial tubular sections so that the inner and outer cylinders can move longitudinally and rotate relative to each other. A passage 6 'extends through the center of the buffer cylinder. Further, the hydraulic oil supply path 6 'is provided with a means (not shown) for receiving oil from or sending oil to the buffer cylinder in accordance with a change in volume caused by the buffer movement. .

The hydraulic oil supply path 6 ′ is connected to a hydraulic oil supply source 6. The hydraulic oil supply passage 6 ′ communicates with the shift transmission 4 and the hydraulic motor 2 that drives one wheel and is housed in the axle support device 7. The axle support device 7, the hydraulic motor 2 and the shift transmission 4 are respectively arranged near the hub of the vehicle wheel R, that is, on or around the center of rotation 13 of the axle and wheel.

The lower end of the outer cylinder 1b of the cushioning cylinder is firmly connected to the upper part of the axle support device 7. On the other hand, the upper end of the inner cylinder 1a of the buffer cylinder is supported by an elastic bearing 8 so as to be spatially movable, that is, movable in a three-dimensional direction. The elastic bearing 8 is preferably made of rubber, and is fixed to a cross member 14 extending substantially in parallel with the axle 13.

The cross member 14 is connected to the upper end of the support member 9,
It is supported by the supporting member 9. The lower end of the strut 9
It is welded to the frame 12 of the car.

As shown in FIG. 1, an automobile frame 1
2 has actually been lowered to a very low position, which is the height of the axle 13, ie the height of the hydraulic motor 2 in practice.

The two lateral links 3 have their wheel-side ends 3a supported on the bottom of the axle support device 7 so as to be freely rotatable in the horizontal direction. It is supported on the bottom of the frame 12 so as to be rotatable in the vertical direction.

In the embodiment shown in FIG. 2, two links 3
Are separated from each other and supported by an axle support device. However, in the embodiment shown in FIG. 3, the ends 3a 'of the two links 3 are joined together.

The lateral link 3 is a force generated by acceleration and braking during driving of the motor vehicle, and a supporting force generated by a lateral guiding force and a vertical force (when the device of the present invention is used in a crane truck). ) And support it. By virtue of the action of the two transverse links, the struts 9 need only bear the vertical forces and the remainder of the forces generated by acceleration and braking. As a result, in the configuration according to the present invention, the support material does not need to support most of the forces supported by the support material in the conventional configuration.
This has the effect that the supporting material can be designed to be structurally simple and lightweight.

As shown in FIG. 1, a turning link 10 is mounted on the outer cylinder 1b of the shock-absorbing cylinder firmly connected to the axle support device 7. One connecting rod 5 is connected to the pivot link 10 so that it can move spatially, that is, in a three-dimensional direction, with the help of the first spherical head 11. A second spherical head 11 'is provided at the other end of the connecting rod 5, and is connected to a means (not shown) for steering the wheel R.

The hydraulic oil passage 6 'is connected to the inner cylinder 1a of the buffer cylinder.
And a second tubular portion passed through the center of the outer cylinder 1b of the shock-absorbing cylinder. The two tubular portions of the oil passage 6 'have different diameters such that one tubular portion overlaps with another tubular portion over a range of lengths. At the same time, the two tubular parts are connected to the outer cylinder
Are sealed together in such a way that the two tubular parts of the oil passage 6 'can move relative to each other (belonging to the spring mass) according to their relative movements.

As described above, the oil reservoir for receiving oil from or sending oil to the buffer cylinder in response to a change in volume caused by the shock-absorbing movement of the shock-absorbing cylinder, or has a similar function. Means are provided for performing the operations.

[0024]

As described above, according to the present invention, the height of the vehicle frame from the ground can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of the device of the present invention.

FIG. 2 is a first embodiment of a link for guiding a shock-absorbing cylinder.

FIG. 3 shows a second embodiment of a link for guiding a shock-absorbing cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1a Inner cylinder of buffer cylinder 1b Outer cylinder of buffer cylinder 2 Hydraulic motor 3 Lateral link 4 Shift transmission 5 Connecting rod 6 'Oil path 7 Wheel support device 8 Elastic bearing 9 Support member 10 Swivel link 11 Spherical head 12 Frame 13 Axle 14 Cross member R wheel

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Ernst Kaspar 89597 Mundatingen Danziger Strasse 29 (56) References JP-A-63-25114 (JP, A) Japanese Utility Model Application Hei 5-54042 (JP, U) Japanese Utility Model 2 85605 (JP, U) Japanese Utility Model 50-114903 (JP, U) Japanese Utility Model 49-37857 (JP, Y1) International Publication 93/13954 (WO, A1) (58) Fields surveyed (58) Int.Cl. ⁷ , DB name) B60K 7/00 B60G 3/28

Claims (5)

(57) [Claims] 1. A device for driving and steering wheels (R) supported by an axle support device (7) for a motor vehicle having a frame (12), comprising an outer cylinder (1b) and an inner cylinder (1b). A shift cylinder that includes a cylinder (1a) and is provided with a hydraulic oil passage (6 ′) at the center thereof and is connected to the hydraulic oil passage (6 ′) guided by a link; (4) and a hydraulic motor (2) housed within the axle support device (7) and located near the hub of the wheels (R), such that the frame (12) is The lower end of the outer cylinder (1b) of the shock-absorbing cylinder is rigidly connected to the axle support device (7), and the upper end of the inner cylinder (1a) of the shock-absorbing cylinder. Are supported by a supporting member (9) extending from the frame (12). Apparatus characterized by being supported for movement in three-dimensional directions by an elastic bearing fixed to (14) (8). 2. An end (3a, 3a ') on the wheel (R) side is supported by a bottom of the axle support device (7), and the other end is rotatably supported by a bottom of the frame (12). Device according to claim 1, characterized in that it comprises two transverse links (3). 3. The device according to claim 2, wherein the wheel-side ends (3a ') of the two transverse links (3) are joined to one another. 4. A swivel link (10) is mounted on the outer cylinder (1b) of the shock-absorbing cylinder, and a connecting rod (5) having a spherical head (11) is supported on the swivel link (10). Claims 1 to 3 characterized in that:
An apparatus according to any one of the preceding claims. 5. The device according to claim 1, wherein the shift transmission (4) is provided so as to be able to shift in two stages.