JPH11294492A - Driving device of generating set for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce rotational vibration and a load generated due to the rotational vibration by providing a free-wheel between a driving part connected to an automobile engine and a driven part connected to a generating set. SOLUTION: This driving device is designed as a belt pulley, connected to an automobile engine through a belt, and provided with an outer wheel 1 constituting the driving part of a generating set. A driven part connected to the generating set is formed out of an inner wheel 5. A free-wheel 3 guided in a free-wheel holder, and provided with free-wheel ring or fastening rollers, is provided between the outer wheel 1 and the inner wheel 5. When rotational vibration is generated in drive of the outer wheel 1, the fastening rollers are released and the free-wheel 3 is operated, and drive connection between the outer wheel 1 and the inner wheel 5 is temporarily made invalid or after delay of a certain time it is made valid again. Hereby, rotational vibration generated by the automobile engine is perfectly damped, and it is reduced to the utmost to be transmitted to the generating set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for a power generator for a motor vehicle.

[0002]

BACKGROUND OF THE INVENTION In practice, the drive part connected to the motor vehicle engine was conventionally rigidly connected to the generator. The drive part is, in particular, a belt pulley driven from a motor vehicle engine. At low rotational speeds and / or in the case of intermittent operation of a motor vehicle engine, in particular a diesel engine, rotational vibrations are introduced from the motor vehicle engine into the drive and / or the belt pulley, and thus directly into the power generating unit and / or Reportedly. As a result of the severe acceleration and deceleration thus produced, very severe loads are applied not only to the drive belt between the vehicle engine and the drive part of the generator set, but in particular to the bearings of this generator set, thus The drive belt and / or generator have a relatively short useful life.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drive in which the above-mentioned rotational vibrations and the resulting loads are eliminated or at least significantly reduced in order to extend the operating useful life of the drive. To provide.

[0004]

SUMMARY OF THE INVENTION The present invention is mainly characterized in claim 1.

Thus, in particular, according to the invention, a freewheel is provided between a drive part connected to the motor vehicle engine and a driven part connected to the generator.

[0006] Thanks to this freewheel, the drive power is transmitted from the vehicle engine to the generator, while at the same time the freewheel is adjusted to a small extent with the vibration of the rotational speed of the vehicle engine being controlled by the drive or its driven parts. The acceleration and deceleration of the driving device are made completely equal to each other in such a manner as to act only on the driving device. The drive life is extended since the acceleration, deceleration and associated severe loads on the drive and driven belts are reduced in this way.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Exemplary embodiments of the present invention will be described below with reference to the drawings.

The drive is first designed in a typical embodiment as a belt pulley and is connected, for example, to a motor vehicle engine via a belt (not shown) and forms an outer ring 1 which constitutes the drive for the drive of the generator set. Have. A driven part connected to a generator (also not shown) is formed by an inner ring 5. Freewheel with a freewheel ring or clamping roller 10 between the outer ring 1 and the inner ring 5 guided in a freewheel holder 9 and acted on by a spring 8 fixed to the freewheel holder 9 There are three. The inner race 5 has a tightening inclined portion 11 into which the tightening roller 10 is pushed by the spring 8.
When the outer ring 1 rotates as a driving part in the direction of the arrow according to FIG. 2, the inner ring 5 is carried along a tightening roller 10 acting on a tightening ramp 11. In the opposite rotation, the outer ring (pulley) 1 moves freely. If there is rotational vibration in the driving of the outer wheel 1, the free wheel works because the tightening roller 10 is loosened by the tightening inclined portion 11, and as a result, the driving connection between the outer wheel 1 and the inner wheel 5 is temporarily invalidated. Or re-enable after some time delay. This achieves the cancellation of the rotational vibration acting on the outer wheel 1 with respect to the driven inner wheel 5. In the illustrated exemplary embodiment in addition to the freewheel 3, at least one roller bearing 4 is provided between the outer ring 1 and the inner ring 5 for guiding the outer ring 1 with respect to the inner ring 5. In this exemplary embodiment, in particular cylindrical roller bearings or needle roller bearings 4 are provided, one of which is in each case arranged on each axial side of the freewheel 3. As the drawing further shows, a bearing sleeve 2 is arranged between the outer ring 1 on one side and the freewheel 3 and the roller bearing 4 on the other side. The sleeve 2 is a sleeve which is squeezed and pushed into the outer ring 1 without cutting. Therefore,
This bearing sleeve 2 forms an outer race for the bearing rollers or needles of the roller bearing 4 and for the clamping roller 10 of the freewheel 3. The outer side 1 can be made by cutting or designed as a casting, especially when it is designed as a belt pulley as shown. The press-fit bearing sleeve 2 made without cutting therefore has a smooth outer track for the freewheel 3 and the roller bearing 4.

The inner ring 5 may be provided with a track made by cutting without cutting, particularly in place of the press-fitted roller bearing 4 and the freewheel ramp 11.

[0010] It is also called a dynamo or an alternator.
The generator (not shown) is fixed in the inner hole of the inner race 5, for example by notching, centered on diameter and screwed the generator by means of a thread in the inner hole of the inner race 5. As it is possible, the generator is rigidly connected to the inner ring 5.

The inner race 5 can be guided axially with respect to the outer race 1 by at least one lamination ring 6, which lies in a circumferential groove in the outer race 1 and the inner race 5. Thereby, the freewheel 3 and the roller bearing 4 can be sealed so that lubricating grease does not come out and, for example, spray water does not enter.

On the opposite side of the drive, ie on the opposite end of the structural unit and thus on the opposite side of the lamination ring 6, a slip ring seal 7 is provided, sealing the other end in a corresponding manner.

[0013]

The present invention is cost effective to manufacture, completely damping the rotational vibrations generated by the vehicle engine and transmitting these vibrations to the generator as little as possible. Provide a compact drive that can operate uniformly and result in a structural unit having a long useful life.

[Brief description of the drawings]

FIG. 1 is an axial section through a drive device according to the invention.

FIG. 2 is a cross-sectional view through the drive device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer ring 2 Bearing sleeve 3 Freewheel 4 Roller bearing 5 Inner ring 6 Laminated ring 7 Slip ring seal 8 Spring 9 Freewheel cage 10 Tightening roller 11 Tightening ramp

Claims (9)

[Claims] 1. A freewheel (3) is provided between the driving part (1) and the driven part (5), comprising a driving part connected to an automobile engine and a driven part connected to a power generator. A driving device for a power generator for a vehicle, comprising: 2. The freewheel (3) wherein the driving part is an outer wheel (1) driven by an automobile engine, in particular a belt pulley, and the driven part is an inner wheel (5) connected to the power generator. Are arranged between the outer ring (1) and the inner ring (5).
3. The driving device according to claim 1. 3. The drive device according to claim 2, wherein at least one roller bearing is provided between the outer ring (1) and the inner ring (5) in addition to the freewheel. 4. The drive according to claim 1, wherein a cylindrical roller bearing or a needle roller bearing (4) is provided on each of two axial sides of the freewheel (3). apparatus. 5. An outer ring (1) on one side and a freewheel (3) and a roller bearing (4) on the other side, wherein the bearing sleeve (2), which is a sleeve that has been squeezed without any machining, is provided. 5. The drive device according to claim 1, wherein the drive device is arranged so as to be pressed into the outer ring (1). 6. A free-wheel ramp (11) wherein said inner race (5) is made by machining for a roller bearing (4) and without machining for a freewheel (3). The driving device according to any one of claims 1 to 5, further comprising: 7. The freewheel (3) comprises a retainer (9) with a clamping roller (10), said clamping roller being formed by a spring (8) acting on the retainer (9). 7. The drive according to claim 1, wherein the drive is pressed against a freewheel ramp (5). 8. The inner ring (5) being axially guided and sealed with respect to the outer ring (1) by a laminated ring (6) which engages both the outer ring (1) and the inner ring (5). The drive device according to any one of claims 1 to 7, wherein 9. Drive according to claim 8, characterized in that a slip ring seal (7) is provided at the end of the drive opposite the lamination ring (6).