JP2001071774A - Reduction gear for single wheel independent drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reduction gear for single wheel independent drive that can adjust to an arbitrary tread, arbitrary differential gear, independent suspension system and all types of a power supply source. SOLUTION: A fixed member 11 has a coupling portion 13, and a rotary member 21 is fitted on the fixed member 11 for rotation thereabout. The space enclosed by both members 11 and 21 stores an input shaft 31 rotatably supported on the fixed member 11, reduction gears 35 interposed between the input shaft 31 and rotary member 21, and a brake device 36 interposed between both fixed and rotary members 11 and 21. The input shaft 31 has a drive coupling portion 32 facing the fixed member 11, while the rotary member 21 has a wheel coupling portion 24. For system operation, the coupling portion 13 is fixedly coupled to a vehicle-side coupling portion, a vehicle-side driving axle end is coupled to the drive coupling portion 32, and a wheel is fixedly mounted on the wheel coupling portion 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-wheel independent drive reduction gear device used for various industrial vehicles, for example.

[0002]

2. Description of the Related Art Conventionally, as this kind of device, an axle integrated with a differential has been provided.

[0003]

However, according to the axle integrated with the differential described above, it is not possible to cope with any tread or any differential, and it is also compatible with an independent suspension due to the large weight under the suspension spring. It was not possible to cope when the power source to the reduction transmission was different.

Accordingly, the invention according to claim 1 of the present invention provides a one-wheel independent drive speed reducer which can cope with any tread and any differential, can cope with an independent suspension, and can cope with all kinds of power supply sources. It is intended to provide.

[0005]

In order to achieve the above-mentioned object, according to the present invention, there is provided a one-wheel independent drive speed reducer according to a first aspect of the present invention, comprising: a fixed side member having a connecting portion; An input shaft rotatably supported by the fixed-side member side, in a space surrounded by the fixed-side member and the rotary-side member, having a rotation-side member fitted and rotatably mounted, A deceleration transmission device provided between the input shaft and the rotation-side member side, and a brake device provided between the fixed-side member side and the rotation-side member side are provided, and the input shaft includes And a drive connecting portion facing the fixed side member, and a wheel connecting portion provided on the rotating side member.

Therefore, according to the first aspect of the present invention, in order to use the one-wheel independent drive speed reducer, the connecting portion of the fixed side member is connected and fixed to the vehicle side connected portion, and the vehicle side drive device is used. The end of the interlocked power shaft may be connected to the drive connection of the input shaft, and the wheel may be connected and fixed to the wheel connection of the rotating member. The rotational force of the drive unit is
The transmission can be performed at a reduced speed to the rotation-side member via the input shaft and the reduction transmission device, so that the wheels can be rotated. The brake device can be activated by depressing a brake pedal or the like during traveling.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The one-wheel independent driving reduction gear transmission 10 includes a fixed side member 11 and a rotating side member 21 which is externally fitted to the fixed side member 11 and rotatably mounted.
And The fixed side member 11 includes a cylindrical portion 12, a flange-shaped connecting portion 13 extending perpendicularly outward from one end of the cylindrical portion 12, and a ring extending perpendicularly inward from the other end of the cylindrical portion 12. It is composed of a plate-like inner plate portion 14 and the like. A receiving cylinder 15 is provided at the other end of the cylinder 12.
Are connected and fixed by a fixture (bolt or the like) in a state where the rotation axis A is substantially in contact with the common axis. A guide cylinder 16 is inserted into the center hole of the inner plate portion 14 and fixed and connected by a fixing tool, and a ring body 17 is abutted on the other end side surface and connected and fixed by the fixing tool. I have.

The rotation side member 21 has a common rotation axis A with a first cylindrical body 22 which is externally fitted from the cylindrical portion 12 to the receiving cylindrical body 15 and rotatably mounted via a plurality of bearings. A second tubular body 23 connected and fixed by a fixture in a state of being substantially in contact with the other end side of the first tubular body 22, and formed in a step shape on the outer surface of the second tubular body 23. Wheel connecting part 2
4 and the like. And the second cylindrical body 2
A ring plate 25 is brought into considerable contact with the other end of 3 and is connected and fixed by a fixture, and a lid 26 is brought into contact with the ring plate 25 and connected and fixed by the fixture.

An input shaft 31 rotatably supported by the fixed-side member 11 is provided in a space surrounded by the fixed-side member 11 and the rotating-side member 21. , And a brake device 36 provided between the fixed-side member 11 side and the rotation-side member 21 side. That is, the input shaft 31 is cylindrical, and is configured to be rotatable on the rotation axis A by being supported by the ring body 17 via a bearing. A spline portion 32 is provided on the inner surface on one end side.
The spline portion 32 is an example of a drive connecting portion facing the fixed side member 11 side, and
It is open through. A deceleration transmission device 35 including a gear mechanism is provided between the input shaft 31 and the rotation member 21, and a brake device 36 is provided between the fixed member 11 and the rotation member 21. Is provided.

The operation of the first embodiment will be described below. In order to use the one-wheel independent drive reduction device 10, the connecting portion 13 of the fixed-side member 11 abuts on the vehicle-side connected portion 1 and is connected and fixed by a fixing tool. The spline shaft at the end of the power shaft 2 interlocked with the drive device on the vehicle side is inserted through the guide cylinder 16 and is spline-fitted to the spline 32 of the input shaft 31. Further, wheels are attached to the rotating side member 21, that is, the wheel side rim 3 is brought into contact with the wheel connecting portion 24 of the rotating side member 21 to be connected and fixed.

The rotational force of the drive unit is reduced and transmitted to the second tubular body 23 of the rotating member 21 via the power shaft 2, the input shaft 31, the reduction transmission device 35, the ring plate 25, and the like.
Thus, the wheels can be rotated via the rim 3. The brake device 36 can be operated by depressing a brake pedal or the like during traveling. In addition, one-wheel independent drive reduction gear 1
A value of 0 can be used as a free wheel if the power shaft 2 is not linked to the input shaft 31, and the brake device 36 can be operated even at this time, so that the function as a brake wheel can be exhibited.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. This second embodiment shows the correspondence to different front and rear treads. That is, even when the distances LA and LB of the front and rear vehicle-side connected parts 1A and 1B are different from the vehicle body axis 41, the vehicle-side connected part 1 is not required.
Since it is only necessary to abut the connecting portion 13 of the fixed side member 11 to A and 1B and to connect and fix it with a fixing tool, a common one-wheel independent drive reduction device 10 is used even though the vehicle has different treads before and after. It becomes possible.

Next, a third embodiment of the present invention will be described with reference to FIG.
It will be described based on. The third embodiment shows a support for an independent suspension. That is,
The connecting portion 13 of the fixed side member 11 abuts on a suspension member 47 connected to the vehicle body side 45 via a link 46 or the like, and is connected and fixed by a fixing tool. As a result, it becomes possible to cope with an independent suspension, which cannot be achieved with an axle integrated with a differential.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
It will be described based on. In the fourth embodiment, correspondence to an arbitrary input device is shown. In the single-wheel independent drive speed reducer 10, since the drive connection portion of the power shaft (power transmission shaft) 2, that is, the spline portion 32 is provided in advance on the input shaft 31, the shaft end of the power shaft 2 is If the power source is adjusted so that it can be inserted into the spline portion 32, the power source is not restricted at all.

FIG. 6 (a) shows the connecting portion 1 of the fixed member 11 with respect to the main body of the electric or hydraulic motor 51.
The motor shaft 52 is connected and fixed to the input shaft 31 by abutment with the input shaft 31. In FIG. 6B, a propeller shaft 56 from an external differential 55 is connected to the input shaft 31 in an interlocked manner. As shown in the above-described embodiments, the connecting portion 1 to the vehicle frame side
3 and the input shaft 31 is provided with a spline portion (drive connecting portion) and has a shape completely independent of the power source.

A power source having a large reduction ratio and a high-speed rotation can be directly input. By having the connecting portion 13, it is possible to cope with any tread, and it is also possible to cope with any differential, so that the versatility to various (other) vehicles is high. The weight under the suspension spring can be reduced, and it is possible to respond to an independent suspension type suspension.

The power supply source is a hydraulic motor, an electric motor,
It is possible to correspond to all types such as mechanical type,
Its versatility can be expanded. As the brake device 36, a completely closed one can be attached. In the above-described embodiment, the spline portion 32 formed on the inner surface of the cylindrical body as the drive connection portion of the input shaft 31
And the spline shaft at the end of the power shaft 2 is spline-fitted to the spline portion 32, which makes the drive connection of the input shaft 31 a spline shaft, and A type in which a cylindrical body is provided at an end portion and a spline portion is formed on the inner surface thereof may be used.

In the above embodiment, the fixed member 1
1. Both the rotation-side member 21 is composed of a plurality of connected fixed bodies, but the number and shape of these parts are arbitrary.

[0019]

According to the first aspect of the present invention, in the one-wheel independent driving speed reducer, the connecting portion of the fixed side member is connected and fixed to the vehicle side connected portion, and is interlocked with the vehicle side driving device. The end of the power shaft is connected to the drive connecting portion of the input shaft, and the wheels are connected and fixed to the wheel connecting portion of the rotating side member, so that it can be used.

At this time, the vehicle has a connection portion to the vehicle frame side, and the input shaft has a drive connection portion and is completely independent of the power source, so that it can cope with any tread. It is possible to adapt to any differential, and it is possible to reduce the unsprung weight of the suspension and to respond to the independent suspension, and the power supply source is a hydraulic motor, electric motor,
It is possible to correspond to all types such as mechanical type,
Its versatility can be expanded.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a longitudinal sectional side view of a single-wheel independent drive speed reducer.

FIG. 2 is a schematic side view of the same-wheel independent drive speed reducer.

FIG. 3 is a schematic front view of the same-wheel independent type drive reduction device.

FIG. 4 is a schematic plan view showing a second embodiment of the present invention, in which a single-wheel independent drive speed reducer is adapted to different front and rear treads.

FIG. 5 is a schematic side view showing a third embodiment of the present invention, in which a one-wheel independent drive speed reducer is adapted to an independent suspension type suspension.

FIG. 6 is a schematic side view showing a fourth embodiment of the present invention, in which a single-wheel independent drive speed reducer is adapted to an arbitrary input device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vehicle-side connected portion 1A vehicle-side connected portion 1B vehicle-side connected portion 2 power shaft 3 rim 10 one-wheel independent drive reduction device 11 fixed side member 13 connecting portion 21 rotating side member 24 wheel connecting portion 31 input shaft 32 Spline part (drive connection part) 35 Reduction transmission device 36 Brake device 41 Body axis 47 Suspension member 51 Motor 55 Differential 56 Propeller shaft A Rotation axis

Claims (1)

[Claims] 1. A fixed-side member having a connecting portion, and a rotatable-side member externally fitted to the fixed-side member and rotatably mounted, and are surrounded by the fixed-side member and the rotatable-side member. An input shaft rotatably supported on the fixed side member side in a space, a reduction transmission device provided between the input shaft and the rotary side member side, and a fixed side member side and a rotary side member side; And a brake device provided between the input shaft and the input shaft, a drive connecting portion facing the fixed member side is provided, and the rotating member is provided with a wheel connecting portion. One-wheel independent drive reduction gear.