CN212343516U - Electric motor for a transmission - Google Patents
Electric motor for a transmission Download PDFInfo
- Publication number
- CN212343516U CN212343516U CN202020259156.2U CN202020259156U CN212343516U CN 212343516 U CN212343516 U CN 212343516U CN 202020259156 U CN202020259156 U CN 202020259156U CN 212343516 U CN212343516 U CN 212343516U
- Authority
- CN
- China
- Prior art keywords
- motor
- electric motor
- transmission
- transmission housing
- output shaft
- 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.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 40
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims 4
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
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
- H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
- H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
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- 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
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- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- General Details Of Gearings (AREA)
- Gear Transmission (AREA)
Abstract
An electric motor for a transmission comprises an electric motor (4) with an output shaft (9) provided with a worm drive (10) which meshes with a spur gear (3) of a drive wheel (2) rotatably mounted in a transmission housing (1), while the electric motor (4) has on its front wall (5, 6) elastic O-rings (25, 26) for mounting in the transmission housing (1), and the loose end of the output shaft (9) is rotatably mounted in a slip ring (12) which is injection-moulded in an elastic plastic bearing bush (11) mounted in the transmission housing (1). The O-rings (25, 26) can be mounted with their inner diameter in grooves (7, 8) formed on the front walls (5, 6) of the motor (4) and with their outer diameter in flange grooves (15, 16) of detachable flanges (13, 14) which are firmly connected to the transmission housing (1).
Description
Technical Field
The present invention relates to an electric motor for a transmission, in particular in a motor vehicle body, wherein the output shaft of the electric motor has a worm wheel which meshes with a spur gear of a drive wheel rotatably mounted in a transmission housing.
Background
Automotive transmissions, also known as actuators, are used to operate a number of devices that are part of the body, chassis, or even the drive train. In automotive bodies, actuators are commonly used to operate locks, for example in vehicle doors, engine hoods, rear covers, seats and fuel tank filler covers. Actuators are increasingly driven by electric motors with bidirectional operation. Advantageously, the transmission of torque from the output shaft of the electric motor to the transmission wheel of the actuator is realized by means of a worm gear. Worm gears are the most common reduction gears, as they offer an effective solution for angle drives at a very substantial price. The worm gear can achieve high ratios of up to 100 times, and in some cases even higher. The gear ratio is high, light in weight, strong in load capacity and silent in operation is the advantage of the worm gear. When the motors start, their speed increases sharply and is very high in operation. However, the rapid increase in speed and the high speed of rotation of the motor shaft during operation are accompanied by high noise levels. The electric motor for driving the actuator in the vehicle is usually mounted in a housing made of solid plastic. The housing wall resonates with the motor and further increases the noise level.
SUMMERY OF THE UTILITY MODEL
The object of the invention is to reduce the noise level of an actuator, in particular the noise from the drive motor of the actuator.
According to the invention, the disadvantages of the prior art are largely eliminated and the object of the invention is achieved by an electric motor for a transmission, in particular in a motor vehicle body, wherein the output shaft of the electric motor has a worm wheel which meshes with a spur gear of a drive wheel rotatably mounted in a transmission housing. The essence is that the motor has a resilient O-ring on its front wall for mounting in the transmission housing, and the loose end of the output shaft is rotatably mounted in a slip ring in a resilient plastic bearing bush injection molded in the transmission housing.
Advantageously, the O-ring may be mounted with its inner diameter in a groove formed on the front wall of the motor and with its outer diameter in a flange groove of a removable flange that is firmly connected to the transmission housing. Advantageously, the plastic bearing bush can be mounted in the transmission housing adjustably in at least one direction perpendicular to the output shaft axis. Advantageously, the housing of the slip ring may have a profile for locking the position of the ring to prevent rotation of the bearing bush along the axis of the motor shaft.
An advantage of the electric motor for a transmission according to the invention is that the noise level of the actuator is reduced. Another advantage of the electric motor for a transmission according to the present invention is that the vibration of the output shaft is reduced by improving the quietness and accuracy of the engagement of the worm wheel with the spur gear of the drive wheel. Another advantage of the electric motor for a transmission according to the present invention is that the force is evenly distributed into the mounting points of the electric motor and the output shaft. Another advantage of the electric motor for a transmission according to the present invention is that it is easy to replace the motor mounting O-ring and to replace the bearing bushing and the slip ring of the motor output shaft. Another advantage of the electric motor for a transmission according to the present invention is the ability to accurately adjust or set the position of the bearing bushing, allowing a higher accuracy of the meshing of the worm gear with the spur gear of the transmission wheel.
The elasticity or softness of the bearing bush material can be chosen appropriately to achieve optimum damping. One of the most important criteria for an actuator is the actuator noise level. The motor is mounted in the actuator body by means of O-rings and the motor shaft is mounted in a 2-K bearing. The mounting by means of O-rings and 2-K bearings eliminates the transmission of vibrations from the motor to the actuator body. The motor body is not in direct contact with the actuator body. This reduces the noise level of the actuator. The 2-K bearing includes a brass bushing that is injection molded into a soft EPDM package. At the top and bottom of the removable flange of the transmission housing, there is a groove for mounting an O-ring of the motor.
Drawings
An electric motor for a transmission according to the invention is explained in the drawing, in which
Figure 1 shows a longitudinal section through an actuator,
fig. 2 is a view of the motor mounted in the removable flange.
Detailed Description
According to fig. 1, a motor vehicle transmission is arranged in a housing 1. The actuator is driven, together with the other components of the actuator, by an electric motor 4 mounted in the housing 1. The output shaft 9 of the electric motor 4 has a fixed worm gear with a worm gear 10 which meshes with the spur gear 3 of the drive wheel 2 rotatably mounted in the gear housing 1. The drive wheel 3 drives the other transmission gears of the actuator. The motor 4 has a cylindrical protrusion on its front wall 5, along the circumference of which there is a circumferential groove 7. The O-ring 25 is mounted with its inner diameter in the circumferential groove 7. The outer diameter of the O-ring 25 is mounted in a detachable flange, i.e. a bottom flange, which is part of the housing 1. The other removable flange, i.e. the flange of the top, is not shown in the sectional view. Similarly, the front wall 6 of the motor 4 has a cylindrical protrusion 8, and the O-ring 26 is mounted with its inner diameter in this cylindrical protrusion 8. The outer diameter of the O-ring 26 is mounted in the bottom detachable flange 13, which bottom detachable flange 13 is part of the housing 1. The other detachable flange, i.e. the detachable flange of the top, is not shown in the sectional view. The removable flanges 13, 14 enable easy removal of the motor 4 and easy replacement of the O- rings 25, 26. The loose end of the output shaft 9 is rotatably mounted in a slip ring 12 which is injection moulded in an elastic plastic bearing bush 11 mounted in the transmission housing 1. The plastic bearing bush 11 is mounted in the transmission housing 1 in an adjustable manner at least in one direction perpendicular to the axis of the output shaft 9.
A special profile of the housing of the slip ring 12 is required to achieve a position locking of the ring 12 to prevent the bearing bush 11 from rotating along the axis of the shaft of the motor 4. The locking against rotation can be achieved by creating a track along the outer circumference of the slip ring 12 or by a more protruding shape offset along the outer circumference of the ring, or by a combination of track and offset.
According to fig. 2, the bottom flange 13 is either integral with the casing 1 or inserted into a suitable slot in the casing 1, so that the position of the bottom flange 13 is symmetrical with respect to the axis of the motor 4. The top flange 14 is mounted on the bottom flange 13. The two flanges 13, 14 have a common opening and along this opening the two flanges 13, 14 have circumferential flange grooves 15, 16. O-rings 26 are mounted in the circumferential flange grooves 15, 16. The arrangement of the opposite side of the motor 4 is similar.
List of reference numerals
1 casing
2 driving wheel
3 spur gear
4 electric motor
5 front wall
6 front wall
7 groove
8 groove
9 output shaft
10 worm drive mechanism
11 worm wheel
11 bearing bush
12 slip ring
13 removable flange
14 removable flange
15 Flange groove
16 flange groove
25O-ring
26O-ring
Claims (4)
1. An electric motor for a transmission, in particular in the body of a motor vehicle, wherein the output shaft (9) of the electric motor (4) has a worm gear (10) which meshes with a spur gear (3) of a drive wheel (2) rotatably mounted in a transmission housing (1),
it is characterized in that the preparation method is characterized in that,
the electric motor (4) has on its front walls (5, 6) elastic O-rings (25, 26) mounted in the transmission housing (1), and the loose end of the output shaft (9) is rotatably mounted in a slip ring (12) which is injection molded in an elastic plastic bearing bush (11) mounted in the transmission housing (1).
2. The motor for a transmission according to claim 1,
it is characterized in that the preparation method is characterized in that,
the O-rings (25, 26) are mounted with their inner diameter in grooves (7, 8) formed on the front walls (5, 6) of the motor (4) and with their outer diameter in flange grooves (15, 16) of detachable flanges (13, 14) firmly connected to the transmission housing (1).
3. The motor for a transmission according to claim 1,
it is characterized in that the preparation method is characterized in that,
the plastic bearing bush (11) is mounted in the transmission housing (1) in an adjustable manner at least in one direction perpendicular to the axis of the output shaft (9).
4. The motor for a transmission according to any one of claims 1 to 3,
it is characterized in that the preparation method is characterized in that,
the housing of the slip ring (12) has a profile for locking the position of the slip ring (12) against rotation in the bearing bush (11) along the axis of the shaft of the electric motor (4).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CZPUV2019-35986 | 2019-03-06 | ||
| CZ2019-35986U CZ32785U1 (en) | 2019-03-06 | 2019-03-06 | Control device electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212343516U true CN212343516U (en) | 2021-01-12 |
Family
ID=66168912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020259156.2U Active CN212343516U (en) | 2019-03-06 | 2020-03-05 | Electric motor for a transmission |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN212343516U (en) |
| CZ (1) | CZ32785U1 (en) |
| DE (1) | DE202020101237U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112217330B (en) * | 2020-09-16 | 2022-05-03 | 宁波精成电机有限公司 | Car window motor shock attenuation fixed knot constructs and car |
-
2019
- 2019-03-06 CZ CZ2019-35986U patent/CZ32785U1/en active Protection Beyond IP Right Term
-
2020
- 2020-03-05 CN CN202020259156.2U patent/CN212343516U/en active Active
- 2020-03-06 DE DE202020101237.1U patent/DE202020101237U1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE202020101237U1 (en) | 2020-03-16 |
| CZ32785U1 (en) | 2019-04-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |