AU1852399A - Motor driving system - Google Patents
Motor driving system Download PDFInfo
- Publication number
- AU1852399A AU1852399A AU18523/99A AU1852399A AU1852399A AU 1852399 A AU1852399 A AU 1852399A AU 18523/99 A AU18523/99 A AU 18523/99A AU 1852399 A AU1852399 A AU 1852399A AU 1852399 A AU1852399 A AU 1852399A
- Authority
- AU
- Australia
- Prior art keywords
- motor
- drive shaft
- transmission
- driving system
- motor driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D1/101—Quick-acting couplings in which the parts are connected by simply bringing them together axially without axial retaining means rotating with the coupling
Description
P00011 Regulation 3.2 Revised 2/98
AUSTRALIA
Patents Act, 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT TO BE COMPLETED BY THE APPLICANT NAME OF APPLICANT: ACTUAL INVENTOR: ADDRESS FOR SERVICE: DANIEL CHAO-CHIH HSIEH DANIEL CHAO-CHIH HSIEH Peter Maxwell Associates Level 6 Pitt Street SYDNEY NSW 2000 INVENTION TITLE: MOTOR DRIVING SYSTEM DETAILS OF ASSOCIATED PROVISIONAL APPLICATION NO(S): NIL The following statement is a full description of this invention including the best method of performing it known to me:r The present invention relates to a motor driving system, particularly to a motor driving system of simple structure, which reduces vibrations of the drive shaft of the motor.
Usually a motor delivers power at a high rate of revolutions and low torque. In order to obtain a useable, lower rate of revolutions, a transmission system is employed, which at the same time increases torque.
As shown in Fig. 3 conventionally a motor 1 and a transmission system (or gearbox) 2 separate therefrom are used. The motor 1 has a drive shaft 3, and the transmission system 2 has a transmission shaft 4, which is connected to the drive shaft 3. Since the motor 1 and the transmission systems are separate units, the drive shaft 3 and the transmission shaft 4 are basically not exactly aligned, and there will be a small eccentricity with respect to each other. With a considerable length of the drive shaft 3 and the transmission shaft 4 vibrations occur easily.
Therefore a lengthened drive shaft for the motor has been devised, which is directly connected to the gears of the transmission system. This arrangement, however, exposes the gears of the transmission system directly to vibrations of the drive shaft, such that they are easily damaged.
In a conventional setup, vibrations between the drive shaft 3 and the 20 transmission shaft 4 not only generate noise, but also lead to fatigue of the drive shaft 3. In order to eliminate the effect of misalignment between the drive shaft 3 and the transmission shaft 4 and of subsequent vibrations, a flexible connector 5, inserted between the drive shaft 3 and the transmission shaft 4, has been used as an absorbing element.
Many types of flexible connectors have appeared on the market, but all of them have a complicated structure, leading to increased costs, nevertheless still need higher precision. Furthermore, the additional flexible
A
connector 5 between the drive shaft 3 and the transmission shaft 4 requires extra space, so does not allow for a compact design of motor 1 and transmission system 2.
The main object of the present invention is to provide a motor driving system, in which misalignment between the drive shaft of the motor and the transmission shaft of the transmission system is minimized without the need of a connector.
Another object of the present invention is to provide a motor driving system of simple structure.
A further object of the present invention is to provide a motor driving system of little space requirement, allowing for a small distance between the motor and the transmission system.
The present invention can be more fully understood by reference to the following description and accompanying drawings.
Fig. 1 is a sectional view of the motor and the transmission system of the present invention, separated from each other, Fig. 2 is a sectional view of the motor and the transmission system of the present invention, connected to each other, Fig. 2A is a cross-sectional view of the drive shaft and the 20 transmission shaft of the present invention, Fig. 2B is a cross-sectional view of the drive shaft and the transmission shaft of the present invention in another embodiment, S. Fig. 2C is a cross-sectional view of the drive shaft and the transmission shaft of the present invention in a further embodiment, Fig. 3 is a schematic illustration of a conventional motor and transmission system, As shown in Fig. 1, the motor driving system of the present invention mainly comprises a motor 10 and a transmission system 20. The motor 10 has a front side, where a connecting flange 11 is attached, with a central axis passing through the front side. A drive shaft 12 runs along the central axis, having a front section 121 projecting from the front side of the motor 10. The transmission system 20 has a rear side, facing the front side of the motor with a holding plate 21 and a transmission shaft 22 along the central axis, which is connected to the drive shaft 12.
Referring to Fig. 2, a hole 211, concentric with the central axis, is bored through the holding plate 21 for accommodating the front end 121 of the output shaft 12, allowing it to connect to the transmission shaft 22. The holding plate 21 is fastened to the connecting flange 11. As shown in Figs. 1 and 2, from the front side of the connecting flange 11 a ring-shaped positioning projection 13 extends outward. The holding plate 21 has on its rear side a •"circular depression 24 with a periphery, into which the positioning oooeo 20 projection 13 fits for positioning the motor 10 and the transmission system 20 relative to each other without further need for correction.
Referring to Fig. 2A, the front section 121 of the drive shaft 12 is not circular, but flattened with at least one flat surface 122.
The transmission shaft 22 has a rear end with an opening 221 with the same cross-section as the front section 121 of the drive shaft 12. Therefore the front section 121 fits into the opening 221, and a o o rotary movement of the drive shaft 12 is transmitted to the transmissions shaft 22.
Referring to Fig. 2C, in another embodiment of the present invention, a drive shaft 12A with an opening 121A on the front end thereof and a transmission shaft 22A with a flattened rear section 221A are employed. The rear section 221A of the transmission shaft 22A fits into the opening 121A of the drive shaft 12A and is thus taken along with a rotary movement of the drive shaft 12A.
An important characteristic of the present invention is that the transmission shaft 22 of the transmission system 20 is short, completely vanishing therein. The hole 211 is on one side widened to a circular depression 25, into which a bearing 23 for the transmission shaft 22 is laid, ensuring that the transmission shaft 22 remains along the central axis. The bearing 23 effectively prevents lateral and angular deviations of the transmission shaft 22 from the central axis and thus does not allow vibrations and noise to develop.
*o :The surfaces of the connecting flange 11 and the holding plate 21 are connected, leaving no space between the motor 10 and the **"transmission system 20. Only the front section 121 of the drive S" 20 shaft 12 projects from the front side of the motor 10. Thus any vibrations of the drive shaft 12 are minimized.
For further reduction of vibrations, the present invention in a further embodiment, as shown in Fig. 2B, has additional absorbing material 26 between the at least one flat surface 122 of the drive shaft and the corresponding surface in the opening 221 for absorbing :'.vibrations between the drive shaft 12 and the transmission shaft 22.
vibrations between the drive shaft 12 and the transmission shaft 22.
6 The structure of the present invention allows to reduce the combined length of the drive shaft 12 and the transmission shaft 22.
The bearing 23 stably positions the transmission shaft 22 and thus the connection thereof to the drive shaft 12 on the central axis, preventing any lateral or angular deviations therefrom. Thus vibrations and noise are minimized, and material fatigue will not set in.
At the same time, a connector between the drive shaft 12 and the transmission shaft 22 is not required. Therefore the structure of the present invention is simple, with low costs, and the motor and the transmission system 20 can be placed next to each other to save space.
While the invention has been described with reference to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention which is defined by the appended •claims.
*oo oooo0 0 09*.
S...0 S...o
Claims (3)
1. A motor driving system, comprising: a motor with a front side and a drive shaft along a central axis; and a transmission system, having a holding plate for connecting to said front side of said motor and a transmission shaft along said central axis, which has a rear end connected to said drive shaft to be driven thereby and which is supported by a bearing at said rear end, such that said transmission shaft and said drive shaft are kept aligned on said central axis.
2. A motor driving system according to claim 1, wherein said motor on said front end thereof has a connecting flange, on which said holding plate is mounted, said connecting flange and said holding plate having mutually engaging connecting elements for positioning said motor and said transmission system relative to each other.
3. A motor driving system substantially as hereinbefore described with reference to Figs. 1, 2A, 2B and 2C of the accompanying drawings. 0, 9 S. Dated this 2nd day of March 1999. DANIEL CHAO-CHIH HSIEH 90° to By his Patent Attorneys ,t PETER MAXWELL ASSOCIATES ooo° oooo .9 S
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3632598A | 1998-03-06 | 1998-03-06 | |
| US09036325 | 1998-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU1852399A true AU1852399A (en) | 1999-09-23 |
Family
ID=21887964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU18523/99A Abandoned AU1852399A (en) | 1998-03-06 | 1999-03-02 | Motor driving system |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU1852399A (en) |
| GB (1) | GB2347480A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6651522B2 (en) | 2001-09-05 | 2003-11-25 | Xerox Corporation | Gear alignment |
| GB0229969D0 (en) * | 2002-12-21 | 2003-01-29 | Johnson Electric Sa | A motor and gearbox combination |
| DE102011015085A1 (en) * | 2011-03-25 | 2012-09-27 | Neumayer Tekfor Holding Gmbh | Drive arrangement with electric motor and gearbox |
| FR2976861A1 (en) * | 2011-06-24 | 2012-12-28 | Peugeot Citroen Automobiles Sa | Gear motor for traction of e.g. electric car, has speed-reduction gear comprising input shaft that is aligned with driving shaft of machine, where driving shaft is centered on input shaft by coupling units of driving and input shafts |
| DE102020006832B3 (en) | 2020-11-06 | 2021-12-30 | Sew-Eurodrive Gmbh & Co Kg | Gear motor with clutch assembly |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB940296A (en) * | 1959-02-27 | 1963-10-30 | Plessey Co Ltd | Improvements in or relating to pump-and-electric-motor assemblies |
| JPS5323847U (en) * | 1976-08-06 | 1978-02-28 | ||
| GB2186342A (en) * | 1986-02-06 | 1987-08-12 | Johnson Electric Ind Mfg | An electric motor and gearbox unit and component parts thereof |
| FR2594364B1 (en) * | 1986-02-18 | 1989-06-09 | Forest Line Sa | MONOBLOCK ROTARY TOOL HOLDER AND ELECTRIC MOTOR ASSEMBLY |
| GB2276987B (en) * | 1993-04-09 | 1996-05-15 | Koito Mfg Co Ltd | Waterproof construction of a pump-and-motor unit for use in windshield washer systems or the like |
| FR2723155B1 (en) * | 1994-07-26 | 1996-10-11 | Nacam | DEVICE FOR COUPLING TWO SHAFTS |
-
1999
- 1999-03-02 GB GB9904697A patent/GB2347480A/en not_active Withdrawn
- 1999-03-02 AU AU18523/99A patent/AU1852399A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| GB9904697D0 (en) | 1999-04-21 |
| GB2347480A (en) | 2000-09-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK5 | Application lapsed section 142(2)(e) - patent request and compl. specification not accepted |