CN112728018A - Planetary reducer - Google Patents
Planetary reducer Download PDFInfo
- Publication number
- CN112728018A CN112728018A CN202110009959.1A CN202110009959A CN112728018A CN 112728018 A CN112728018 A CN 112728018A CN 202110009959 A CN202110009959 A CN 202110009959A CN 112728018 A CN112728018 A CN 112728018A
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- China
- Prior art keywords
- planetary
- bulge
- planet carrier
- planetary reducer
- stage
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- 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.)
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Classifications
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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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/028—Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise
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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
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
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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
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
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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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
- F16H2001/325—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear comprising a carrier with pins guiding at least one orbital gear with circular holes
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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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
- F16H2001/327—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear with orbital gear sets comprising an internally toothed ring gear
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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
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H2057/085—Bearings for orbital gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention relates to a planetary reducer. The planetary reducer comprises a shell, a planetary reduction set, an output shaft and a rear end cover; the planetary reduction set is arranged in the cylindrical space of the shell and comprises a planetary carrier and a planetary gear which is rotatably arranged on a positioning pin of the planetary carrier; the first bulge capable of abutting against the gasket is formed on one side, close to the adjacent gasket, of the planetary gear, the contact area of the planetary gear and the adjacent gasket is reduced through the first bulge, friction is reduced, and therefore noise of the planetary speed reducer during working is reduced.
Description
Technical Field
The invention relates to a speed reducer, in particular to a planetary speed reducer.
Background
The planetary reduction gearbox (planetary reducer) is an industrial product with wide application, and can reduce the rotating speed of a motor and increase the output torque. The planetary reduction gearbox generally comprises structures such as an inner gear ring, a planet carrier, a planetary gear, a gasket and an output shaft, wherein the planetary gear moves relative to the adjacent gasket in the working process of the planetary reduction gearbox.
However, the planet gears are in large area contact with the adjacent pad, which causes the planet gears to generate large noise when moving relative to the pad and spread outside the planet reduction box.
Disclosure of Invention
In view of the above, the present invention has been developed to provide a planetary reducer that overcomes or at least partially solves the above-mentioned problems.
The planetary reduction gear includes:
the bearing device comprises a shell, a bearing seat and a bearing seat, wherein internal teeth are formed on the inner peripheral wall of a cylindrical space in the shell, a bearing chamber is formed at the front end of the shell, and an opening is formed at the rear end of the shell;
the planetary reduction set is arranged in the cylindrical space of the shell and comprises N planetary carriers and planetary gears which are rotatably arranged on positioning pins of the planetary carriers, wherein N is a positive number; the planet gear is meshed with the internal teeth of the inner circumferential wall of the cylindrical space, and a first bulge capable of abutting against the gasket is formed on one side of the planet gear close to the adjacent gasket;
the output shaft is supported by a bearing arranged in the bearing chamber, and the input end of the output shaft is inserted into the mounting hole in the center of the Nth-stage planet carrier;
and the rear end cover is fixedly arranged at the opening of the shell.
Optionally, the planet gear is provided with a blind hole and is sleeved on the positioning pin of the planet carrier through the blind hole; the first bulge is positioned at the center of the side surface where the planet gear is positioned.
Optionally, the height of the first protrusion gradually decreases from the center to the periphery.
Optionally, a sun gear is fixed on the N-1 th stage planet carrier, a second bulge capable of abutting against the output shaft is formed on one side of the sun gear close to the adjacent N-1 th stage planet carrier, and N-1 is a positive number.
Optionally, the second protrusion is located at the center of the side where the sun gear is located.
Optionally, the height of the second protrusion gradually decreases from the center to the periphery.
Optionally, a sun gear is fixed on the M-1 th-stage planet carrier, a third protrusion capable of abutting against the M-th-stage planet carrier is formed on one side of the sun gear close to the adjacent M-th-stage planet carrier, M-1 is a positive number, and M is smaller than N.
Optionally, the third protrusion is located at the center of the side where the sun gear is located.
Optionally, the height of the third protrusion gradually decreases from the center to the periphery.
Optionally, the number of bearings is 2, and all the bearings are ball bearings.
In the conventional planetary reducer, the first bulge capable of being abutted to the gasket is formed on one side, close to the adjacent gasket, of each planetary gear, so that the contact area between the planetary gear and the adjacent gasket is reduced, friction is reduced, and the noise of the planetary reducer during working is further reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic structural diagram of an exemplary embodiment of a planetary reducer of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 1;
FIG. 4 is an enlarged view of section C of FIG. 1;
fig. 5 is an exploded view of the planetary reducer of fig. 1.
Description of reference numerals: 1. a housing; 2. an output shaft; 3. a rear end cap; 4. a bearing; 5. a 1 st stage planet carrier; 6. positioning pins; 7. a 1 st stage planetary gear; 8. a 2 nd stage planet carrier; 9. a 2 nd stage planetary gear; 10. a sun gear; 11. a gasket; 12. a first protrusion; 13. a second protrusion; 14. a front end cover; 15. an inner gear ring; 16. and (4) screws.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below are exemplary embodiments for explaining the present invention with reference to the drawings and should not be construed as limiting the present invention, and those skilled in the art can make various changes, modifications, substitutions and alterations to the embodiments without departing from the principle and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
The terms "central," "longitudinal," "lateral," "length," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like, referred to or as may be referred to in the description of the invention, are used in the indicated orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover non-exclusive inclusions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A planetary reducer according to an embodiment of the present invention is described below with reference to the accompanying drawings.
Referring to fig. 1 to 5, the planetary reducer according to the embodiment of the present invention includes a housing 1, a planetary reduction set, an output shaft 2, and a rear cover 3.
Internal teeth are formed on the inner peripheral wall of the cylindrical space inside the housing 1, a bearing chamber is formed at the front end of the housing 1, and an opening is formed at the rear end of the housing 1. Corresponding to the view of fig. 1, the upper end of the housing 1 is formed with a bearing chamber, and the lower end of the housing 1 is formed with an opening. Preferably, the bearing chamber comprises a first bearing chamber and a second bearing chamber, each of which is fitted with a bearing 4, such as a ball bearing.
The planetary reduction set is arranged in the cylindrical space of the shell 1 and comprises N planetary carriers and planetary gears which are rotatably arranged on positioning pins 6 of the planetary carriers, wherein N is a positive number. The planetary gear is engaged with the internal teeth of the inner peripheral wall of the cylindrical space.
In the present embodiment, N is 2, that is, the planetary reduction set is a two-stage planetary reduction set, which is a 1 st-stage planetary reduction set and a 2 nd-stage planetary reduction set. The 1 st-stage planetary reduction set comprises a 1 st-stage planet carrier 5 and a plurality of 1 st-stage planetary gears 7 which are rotatably arranged on positioning pins 6 of the 1 st-stage planet carrier 5. The 1 st-stage planetary gear 7 can be meshed with the inner teeth of the input gear sleeved on the rotating shaft of the motor and the inner circumferential wall of the cylindrical space. The 2 nd stage planetary reduction set includes a 2 nd stage planet carrier 8 (i.e., the last stage planet carrier), and a plurality of 2 nd stage planet gears 9 rotatably mounted to the dowel pins 6 of the 2 nd stage planet carrier 8. The 2 nd-stage planetary gear 9 is simultaneously engaged with the sun gear 10 fixed to the 1 st-stage carrier 5 and the internal teeth of the inner peripheral wall of the cylindrical space. When the input gear rotates, the input gear can drive all levels of planetary gears to walk on the inner peripheral wall of the cylindrical space, so that the 2 nd-level planet carrier 8 is driven to rotate.
The planetary gear has a first projection 12 formed on a side close to the adjacent pad 11 and capable of abutting against the pad 11. In contrast to the view of fig. 1, in the present embodiment, the first protrusions 12 are formed at the lower ends of the 1 st-stage planetary gear 7 and the 2 nd-stage planetary gear 9, and the first protrusions 12 can abut against the adjacent spacers 11, so that the contact area between the planetary gear and the adjacent spacers 11 is reduced, friction is reduced, and noise generated during the operation of the planetary reducer is reduced.
Preferably, the planet gear is provided with a blind hole and is sleeved on the positioning pin 6 of the planet carrier through the blind hole. The first bulge 12 is located at the center of the side surface where the planetary gear is located, and the height of the first bulge 12 is gradually reduced from the center to the periphery, for example, the first bulge 12 is hemispherical, spherical crown-shaped, and the like. So as to reduce the length of the traveling track of the first protrusion 12 on the gasket 11 in the process of the planetary gear traveling on the inner peripheral wall of the cylindrical space, thereby reducing the noise of the planetary reducer during operation.
It should be understood that N may also be 1, 3, 4, 5 or other positive numbers, i.e., the planetary reduction set may also be a one-stage planetary reduction set, or a multi-stage planetary reduction set. The planetary gears rotatably arranged on the positioning pins of the planet carrier are provided with first bulges which can be abutted against the gaskets on one sides close to the adjacent gaskets, so that the contact area between the planetary gears and the adjacent gaskets is reduced, friction is reduced, and the noise of the planetary speed reducer during working is reduced.
The output shaft 2 is supported by a bearing 4 arranged in a bearing chamber, and the input end of the output shaft is inserted into a mounting hole in the center of the Nth-stage planet carrier. In the present embodiment, the input end of the output shaft 2 is inserted into a mounting hole at the center of the 2 nd stage planet carrier 8, that is, a mounting hole at the center of the last stage planet carrier. When the 2 nd-stage planet carrier 8 rotates, the output shaft 2 is driven to synchronously rotate. Since the number of teeth of the input gear and the number of teeth of the sun gear 10 are both smaller than the number of teeth of the internal teeth on the inner peripheral wall of the cylindrical space, the rotational speed of the output shaft 2 is smaller than the input gear rotational speed (motor rotational speed), but the output torque increases.
In this embodiment, since the 1 st-stage planetary reduction set has only three planetary gears and the contact area between the planetary gear and the adjacent pad 11 is small, part of the planetary gears are easily separated from the adjacent pad 11 during the rotation process, so that the 1 st-stage planetary carrier 5 is easily shaken and generates noise. To solve this problem, the sun gear 10 fixed on the 1 st-stage carrier 5 forms a second protrusion 13 capable of abutting against the output shaft 2 at a side close to the adjacent 2 nd-stage carrier 8, and the second protrusion 13 is formed at the upper end of the sun gear 10 relative to the view of fig. 1, and the second protrusion 13 adds a supporting point to the 1 st-stage carrier 5, so that the 1 st-stage carrier 5 operates more smoothly.
Preferably, the second protrusion 13 is located at the center of the side where the sun gear 10 is located, and the height of the second protrusion 13 gradually decreases from the center to the periphery, for example, the second protrusion 13 is hemispherical, spherical crown-shaped, or the like. The length of the traveling track of the second protrusion 13 on the output shaft 2 is reduced, the contact area between the second protrusion 13 and the output shaft 2 is reduced, and friction is reduced, so that the noise generated during the operation of the planetary reducer is reduced.
In an alternative embodiment, N ≧ 3, i.e., the planetary reduction set is a multi-stage planetary reduction set, and each of the 1 st through N-1 st stage planetary reduction sets has only three planetary gears. In order to solve the problem that the planet carriers of the 1 st to the N-1 st stages are easy to shake and generate noise, except that the sun gear fixed on the planet carrier of the N-1 st stage is provided with a second bulge capable of being abutted against the output shaft at one side close to the adjacent planet carrier of the N th stage (namely, the last planet carrier), the sun gears fixed on the planet carriers of the 1 st to the N-2 nd stages are provided with a third bulge capable of being abutted against the adjacent planet carrier of the upper stage at one side close to the adjacent planet carrier of the upper stage, namely, the sun gear fixed on the planet carrier of the M-1 st stage is provided with a third bulge capable of being abutted against the planet carrier of the M th stage at one side close to the adjacent planet carrier of the M th stage, wherein M is 2, 3, 4, … … and N-1. The corresponding third bulge increases a supporting point for the planet carriers of the 1 st stage to the N-2 nd stage, so that the planet carriers of the 1 st stage to the N-2 nd stage run more stably.
Preferably, the third protrusion is located at the center of the side where the sun gear is located, and the height of the third protrusion gradually decreases from the center to the periphery, for example, the third protrusion is hemispherical, spherical crown-shaped, or the like. The length of the walking track of the corresponding third bulge on the adjacent superior planet carrier is reduced, the contact area of the third bulge and the adjacent superior planet carrier is reduced, friction is reduced, and therefore noise of the planetary speed reducer during working is reduced.
The rear end cover 3 is fixedly arranged at the opening of the shell 1. In this embodiment, the housing 1 is composed of a front end cover 14 and an inner gear ring 15, the front end cover 14 and the inner gear ring 15 both form a plurality of through holes arranged in an annular array, the rear end cover 3 is provided with screw holes, and the roots of the screws 16 penetrate through the through holes of the front end cover 14 and the through holes of the inner gear ring 15 and then are matched with the screw holes to fix the front end cover 14, the inner gear ring 15 and the rear end cover 3. It should be understood that the front end cap 14, the inner ring gear 15 and the rear end cap 3 can be fixed in other suitable manners.
In the conventional planetary reducer, the first bulge 12 capable of being abutted to the gasket 11 is formed on one side of each planetary gear close to the adjacent gasket 11, so that the contact area between the planetary gear and the adjacent gasket 11 is reduced, friction is reduced, and the noise of the planetary reducer during operation is reduced.
Claims (10)
1. A planetary reducer, comprising:
the bearing device comprises a shell, a bearing seat and a bearing seat, wherein internal teeth are formed on the inner peripheral wall of a cylindrical space in the shell, a bearing chamber is formed at the front end of the shell, and an opening is formed at the rear end of the shell;
the planetary reduction set is arranged in the cylindrical space of the shell and comprises N planetary carriers and planetary gears which are rotatably arranged on positioning pins of the planetary carriers, wherein N is a positive number; the planet gear is meshed with the internal teeth of the inner circumferential wall of the cylindrical space, and a first bulge capable of abutting against the gasket is formed on one side of the planet gear close to the adjacent gasket;
the output shaft is supported by a bearing arranged in the bearing chamber, and the input end of the output shaft is inserted into the mounting hole in the center of the Nth-stage planet carrier;
and the rear end cover is fixedly arranged at the opening of the shell.
2. The planetary reducer according to claim 1, wherein: the planet gear is provided with a blind hole and is sleeved on the positioning pin of the planet carrier through the blind hole; the first bulge is positioned at the center of the side surface where the planet gear is positioned.
3. The planetary reducer according to claim 2, wherein: the height of the first bulge is gradually reduced from the center to the periphery.
4. The planetary reducer according to claim 1, wherein: a sun gear is fixed on the N-1 th-stage planet carrier, a second bulge capable of being abutted against the output shaft is formed on one side of the sun gear close to the adjacent N-stage planet carrier, and N-1 is a positive number.
5. The planetary reducer according to claim 4, wherein: the second bulge is positioned at the center of the side surface where the sun gear is positioned.
6. The planetary reducer of claim 5, wherein: the height of the second protrusion is gradually reduced from the center to the periphery.
7. The planetary reducer according to claim 1, wherein: a sun gear is fixed on the M-1 stage planet carrier, a third bulge capable of being abutted against the M-stage planet carrier is formed on one side of the sun gear close to the adjacent M-stage planet carrier, M-1 is a positive number, and M is smaller than N.
8. The planetary reducer according to claim 7, wherein: the third bulge is positioned at the center of the side surface where the sun gear is positioned.
9. The planetary reducer of claim 8, wherein: the height of the third bulge is gradually reduced from the center to the periphery.
10. The planetary reducer according to any one of claims 1 to 9, wherein: the number of the bearings is 2, and the bearings are all ball bearings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202110009959.1A CN112728018A (en) | 2021-01-05 | 2021-01-05 | Planetary reducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202110009959.1A CN112728018A (en) | 2021-01-05 | 2021-01-05 | Planetary reducer |
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CN112728018A true CN112728018A (en) | 2021-04-30 |
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CN202110009959.1A Pending CN112728018A (en) | 2021-01-05 | 2021-01-05 | Planetary reducer |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114123642A (en) * | 2021-11-08 | 2022-03-01 | 嘉兴学院 | Servo motor with speed reduction adjusting device |
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2021
- 2021-01-05 CN CN202110009959.1A patent/CN112728018A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114123642A (en) * | 2021-11-08 | 2022-03-01 | 嘉兴学院 | Servo motor with speed reduction adjusting device |
CN114123642B (en) * | 2021-11-08 | 2022-09-23 | 嘉兴学院 | Servo motor with speed reduction adjusting device |
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