CN109882585B - Adjustable planetary gear support - Google Patents
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- CN109882585B CN109882585B CN201910249633.9A CN201910249633A CN109882585B CN 109882585 B CN109882585 B CN 109882585B CN 201910249633 A CN201910249633 A CN 201910249633A CN 109882585 B CN109882585 B CN 109882585B
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Abstract
The invention provides an adjustable planetary gear support, and belongs to the technical field of planetary gear transmission. It has solved the current problem such as the unadjustable planetary gear clearance. The invention comprises a body, wherein the body is circumferentially divided into a plurality of planetary gear stations, a shaft body is fixed on each planetary gear station, a contraction gap extending along the radial direction of a central hole is arranged between every two adjacent planetary gear stations, an adjusting mechanism for changing the width of the contraction gap is also arranged on the body, the width of the corresponding contraction gap is adjusted by the adjusting mechanism, so that the two planetary gear stations on two sides of the body can twist around the center of the central hole, and the twisting directions of the two planetary gear stations are opposite. The invention has the advantages that the installation position of the planetary gear on the planetary gear is adjustable, and the clearance between the planetary gear and the sun gear as well as between the planetary gear and the gear ring can be effectively eliminated.
Description
Technical Field
The invention belongs to the technical field of planetary gear transmission, and particularly relates to an adjustable planetary gear support.
Background
The planetary gear mechanism is a common transmission mechanism and mainly comprises a sun gear, planetary gears and a gear ring, wherein the planetary gears are uniformly distributed on a planetary gear support, the position of the position, for installing the planetary gears, on the existing planetary gear support relative to the rotation center of the planetary gear support is fixed and not adjustable, for example, a planetary gear carrier disclosed in the patent No. CN20160769015. X, comprises a web and two groups of axle journals for installing the planetary gears, the axle journals comprise a plurality of axle journals, the axle journals and the web are integrally formed, and the planetary gears, the sun gear and the gear ring are worn after long-term use, so that gaps are generated on the tooth flanks, and when the gaps exceed allowable values, the transmission precision and the service life of the planetary gear mechanism are affected.
Disclosure of Invention
The invention aims at solving the problems of the existing planetary gear mechanism, and provides an adjustable planetary gear support which has adjustable installation position of a planetary gear, can effectively eliminate gaps between the planetary gear and a sun gear and between the planetary gear and a gear ring, ensures transmission precision and prolongs the service life of the planetary gear mechanism.
The object of the invention can be achieved by the following technical scheme.
The utility model provides an adjustable planetary gear support, includes the body that has the centre bore, and the body evenly divides into a plurality of planetary gear stations along centre bore circumference, is fixed with the axis body that is used for installing the planetary gear on each planetary gear station, its characterized in that, a shrink clearance that radially extends along the centre bore is all seted up between two adjacent planetary gear stations, and shrink clearance one end is closed, and the other end opening, shrink clearance run through the body along the centre bore axial, still be equipped with the adjustment mechanism that is used for changing shrink clearance width on the body, adjustment mechanism and shrink clearance one-to-one setting, the width that corresponds shrink clearance through adjustment mechanism enables two planetary gear stations of its both sides and twist around the center of above-mentioned centre bore, and the torsion direction of both is opposite. A shrinkage gap is formed between any planetary gear station and planetary gear stations on two sides of the planetary gear station, and each planetary gear station is in a cantilever-like state, so that the planetary gear station has certain elasticity, the planetary gear station can be twisted by changing the shrinkage gap through an adjusting mechanism, and a shaft body on the planetary gear station is driven to twist around the center of a center hole so as to deviate from the original position of the planetary gear station, so that the azimuth of the shaft body relative to the center of the center hole is changed, the planetary gear is close to an upper gear ring and a sun gear along the twisting direction of the corresponding shaft body, and the gap of one rotating direction between the gear ring and the sun gear is eliminated; the two planetary gears on two sides of the contraction gap are twisted, and the twisting directions are opposite, so that the gaps between the gear ring and the sun gear in two rotation directions are eliminated, and the gear gap of the whole planetary gear transmission system is eliminated.
In the above-mentioned adjustable planetary gear support, the shaft body is provided with four, and the corresponding shrink clearance is provided with four, and four shrink clearance are two by two a set of, and two shrink clearance extension directions of same group are unanimous, and two shrink clearances of same group are stretch and shrink unanimously, and two adjacent shrink clearances stretch and shrink inversely. The same group of shrinkage gaps are expanded or contracted simultaneously, so that the stress balance of the gear ring and the sun gear is ensured, the deviation between the center of the gear ring and the center of the sun gear caused by uneven stress of the gear ring is prevented, the excessive friction in the gear transmission process is effectively prevented, and the service life of the gear is prolonged.
In the above-mentioned adjustable planetary gear support, the adjusting mechanism includes a pin, the pin extends in the same direction as the axial direction of the central hole, the pin gradually increases in outer diameter along the extending direction, a pin hole matching with the pin is formed at the shrink gap, and the pin can axially move in the pin hole to open the shrink gap under the drive of a driving piece. The axial diameter of the pin shaft is gradually increased along the axial direction of the pin shaft, so that the axial movement of the pin shaft can be utilized to change the size of the pin hole, thereby changing the width of the shrinkage gap and achieving the purpose of adjusting the gear gap; and each pin shaft is tightly matched in the corresponding pin hole and is extruded with each planetary gear station part to form 'connection', so that the rigidity of the compensating body reduced due to the arrangement of the shrinkage gap is improved greatly, the rigidity and the strength of the gear station are improved greatly, and the rotation precision is ensured.
In the above-mentioned adjustable planetary gear carrier, the adjusting mechanism is an insert inserted into the shrink gap, and the width of the insert along the axial direction of the central hole is gradually widened.
In the adjustable planetary gear support, the driving piece is a screw in threaded connection with the pin shaft, the screw is concentric with the pin shaft, a screw hole matched with the screw is formed in the pin shaft, and the cross section shapes of the pin shaft and the pin hole are matched and are non-circular. The cross sections of the pin shaft and the pin hole are non-circular, so that the pin shaft can only axially move along the pin hole but can not rotate relative to the pin hole, and the pin shaft can be driven to axially move by rotating the screw; the adjusting mode is simple and convenient, the adjusting precision is high, and the width change of the shrinkage gap is more controllable.
In the adjustable planetary gear carrier, the outer diameter of the pin shaft gradually increases in the process of extending from the screw end to the other end.
In the adjustable planetary gear carrier, the opening end of the contraction gap is located at the edge of the body.
In the above-described adjustable planetary gear carrier, the open end of the shrink gap is located at the edge of the center hole.
In the above-mentioned adjustable planetary gear carrier, the pin hole is located at the periphery of a track formed by rotation of the center of the shaft body relative to the center hole. The pin shaft is tightly matched with the pin hole in a squeezing mode to form a connection mode, and the closer the connection point is to the opening end of the shrinkage gap, the higher the rigidity of the planetary gear station is, the better the transmission precision and stability are.
In the adjustable planetary gear carrier, the pin hole is near the edge of the body. The pin hole is close to the edge of the body, and the two sides of the opening end of the shrinkage gap are connected through close fit with the pin shaft, so that the station rigidity of the planetary gear is greatly improved.
In the above-mentioned adjustable planetary gear carrier, the closed end of the shrink gap is provided with a notch, the width of the notch is larger than the width of the shrink gap, and the notch axially penetrates through the body along the central hole. The notch is beneficial to torsion movement of the planetary gear station, so that the planetary gear station has higher elasticity.
In the above-mentioned adjustable planetary gear carrier, the projection of the notch along the axial direction of the center hole is in a kidney shape.
In the adjustable planetary gear carrier, the pin hole is in a step shape, and the head of the screw is abutted against the step.
In the above-mentioned adjustable planetary gear support, the two side surfaces of the body are respectively provided with the shaft bodies, and the two side shaft bodies are concentrically arranged in one-to-one correspondence.
Compared with the prior art, the invention has the advantages that the contraction clearance is formed on the body, so that the station of the planetary gear can be twisted, and the tooth side clearance between the planetary gear and the tooth ring as well as between the planetary gear and the tooth side clearance between the planetary gear and the; simultaneously, two adjacent gear stations are twisted at the same time, and the twisting directions are opposite, so that the gear side gaps of the sun gear and the gear ring in two rotating directions can be eliminated, the gear gaps of the whole planetary gear transmission system are eliminated, the transmission precision is ensured, and the service life is prolonged; the pin shaft not only has the function of adjusting the shrinkage clearance, but also has the functions of connecting the planetary gear stations and enhancing the rigidity of the body, thereby ensuring the transmission precision and stability; the pin shaft can be driven to move by rotating the screw, the adjustment is simple and convenient, and the adjustment precision is high.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a perspective view of the present invention;
fig. 4 is a schematic view of the present invention applied to a planetary gear mechanism.
In the figure, 1, a body; 2. a central bore; 3. a shaft body; 4. shrinking the gap; 5. a notch; 6. a pin shaft; 7. a screw; 8. a sun gear; 9. a gear ring; 10. a planetary gear A; 11. a planetary gear B; 12. a planetary gear C; 13. a planetary gear D; 14. pin holes.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Embodiment one:
as shown in fig. 1 to 4, the adjustable planetary gear support provided by the invention comprises a circular body 1, wherein the axial lead of the body 1 is the rotation central line of the body during working, the body 1 is concentrically provided with a central hole 2 for accommodating a sun gear 8, the body 1 is uniformly divided into four planetary gear stations along the circumferential direction of the body, two cylindrical shaft bodies 3 are fixed on two sides of each of the four planetary gear stations, the two shaft bodies 3 on the same planetary gear station are concentrically arranged, the shaft bodies 3 axially extend along the central hole 2, the shaft bodies 3 and the body 1 are of an integrated structure, and planetary gears are concentrically arranged on the shaft bodies 3 through bearings.
A shrinkage gap 4 extending and arranged along the radial direction of the central hole 2 is arranged between two adjacent planetary gear stations, the shrinkage gap 4 penetrates through the body 1 from front to back, one end of the shrinkage gap 4 is close to the central hole 2 of the body 1, the end is closed, a notch 5 is arranged at the end part of the end, the notch 5 also penetrates through the body 1 from front to back, the cross section of the notch 5 is waist-shaped, the width of the notch 5 is larger than the width of the shrinkage gap 4, the notch 5 is symmetrically arranged relative to the shrinkage gap 4, and the notch 5 is arranged so as to facilitate the torsion of the planetary gear stations; the other end of the shrinkage gap 4 is arranged at the edge of the body 1 and penetrates through the edge of the body 1.
The body 1 is also provided with an adjusting mechanism for changing the width of the shrinkage gap 4, the adjusting mechanism is arranged in one-to-one correspondence with the shrinkage gap 4, the adjusting mechanism comprises a pin shaft 6 and a screw 7 in threaded connection with the pin shaft 6, the extending direction of the pin shaft 6 is axially consistent with that of the central hole 2, the screw 7 is concentric with the pin shaft 6, the pin shaft 6 is provided with a screw hole matched with the screw 7, the outer diameter of the pin shaft 6 is gradually increased in the extending process from the end of the screw 7 to the other end, the edge of the pin shaft, which is close to the body 1, is provided with a pin hole 14 for the pin shaft 6 to penetrate through, the pin hole 14 is bilaterally symmetrical relative to the shrinkage gap 4, the pin hole 14 is in a step shape, the pin hole 14 is divided into a front hole and a rear hole, the head of the screw 7 is accommodated in the front hole and is abutted against the step, the rear hole is gradually increased along the axial inner diameter of the pin shaft 6, the pin shaft 6 is tightly matched with the rear hole, the cross section shape of the pin shaft 6 and the pin hole 14 is matched with a non-circular shape, the cross section shape can be polygonal or elliptic as shown, the shape is arranged to limit the pin shaft 6 to rotate, and the pin shaft 6 can only axially move along the pin hole 14.
Principle of gear gap adjustment: because the planet gear station will twist, thereby changing the orientation of the shaft body 3 on the planet gear relative to the central bore 2, the planet gear will lean against the sun gear 8 and the ring gear 9 in its station twist direction: taking fig. 3 as an example, the screw 7 is turned, so that the pin 6 moves to increase the contraction gap 4 between the planet gear a10 and the planet gear B11 (the pin 6 between the planet gear a10 and the planet gear C12 and between the planet gear B11 and the planet gear D13 is required to be released in between), the planet gear a10 rotates anticlockwise, the planet gear B11 rotates clockwise, the left gap between the meshing part of the planet gear a10 and the sun gear 8 and the meshing part of the planet gear B11 with the ring gear 9 are eliminated, the right gap between the meshing part of the planet gear B11 and the sun gear 8 and the meshing part of the ring gear 9 are eliminated, the sun gear 8 rotates clockwise to drive the ring gear 9 to rotate through the planet gear a10, and the three have no gap, and when the sun gear 8 rotates anticlockwise to drive the ring gear 9 through the planet gear B11, the three have no gap in both rotation directions of the sun gear 8, so that the transmission accuracy is ensured.
The gear lash adjustment process of embodiment one: firstly, the screws 7 are rotated to loosen the pin shafts 6 in any two opposite shrinkage gaps 4, so that the two shrinkage gaps 4 can be reduced, and then the other two screws 7 are rotated to enlarge the other two shrinkage gaps 4, so that the planetary gear stations on the two corresponding sides are twisted, and the gear gap is adjusted. The four planetary gears are symmetrically adjusted in pairs, the stress of the sun gear 8 and the stress of the gear ring 9 are balanced after the planetary gear transmission mechanism is adjusted, and the center of the sun gear and the center of the gear ring 9 are not deviated.
Embodiment two:
the utility model provides an adjustable planetary gear support, is including being circular shape body 1, and the axial lead of body 1 is the rotation central line of its during operation, and body 1 has offered the centre bore 2 that supplies holding sun gear 8 with one heart, and body 1 evenly divide into three planetary gear station along its circumferencial direction, all is fixed with a columniform axis body 3 on the three gear station, and axis body 3 extends along centre bore 2 axis direction, and axis body 3 and body 1 are integrated into one piece's structure, and planetary gear passes through the concentric cover of bearing and establishes on axis body 3.
A shrinkage gap 4 extending and arranged along the radial direction of the central hole 2 is arranged between two adjacent planetary gear stations, the shrinkage gap 4 penetrates through the body 1 from front to back, one end of the shrinkage gap 4 is close to the central hole 2 of the body 1, the end is closed, a notch 5 is arranged at the end part of the end, the notch 5 also penetrates through the body 1 from front to back, the cross section of the notch 5 is waist-shaped, the width of the notch 5 is larger than the width of the shrinkage gap 4, the notch 5 is symmetrically arranged relative to the shrinkage gap 4, and the notch 5 is arranged so as to facilitate the torsion of the planetary gear stations; the other end of the shrinkage gap 4 is arranged at the edge of the body 1 and penetrates through the edge of the body 1.
The body 1 is further provided with an adjusting mechanism for changing the width of the shrinkage gap 4, the adjusting mechanism is arranged in one-to-one correspondence with the shrinkage gap 4, the adjusting mechanism is an inserting sheet, the width of the inserting sheet along the axial direction of the central hole 2 is gradually widened, and the width of the shrinkage gap 4 can be adjusted by axially moving the inserting sheet along the central hole 2. When the shrinkage gap 4 is adjusted, the inserting piece is required to be moved by external force.
Gear lash adjustment process of embodiment two: firstly, the inserting sheets in any two non-adjacent shrinkage gaps 4 are moved, so that the two shrinkage gaps 4 can be reduced, then, the inserting sheets in the other shrinkage gap 4 are moved, so that the gaps between the inserting sheets are increased, the planetary gear stations on the two corresponding sides are twisted, and the gear gap is adjusted.
It should be understood that in the claims, the specification of the present invention, all "including … …" should be interpreted as open-ended meaning that it is equivalent to "at least … …", and not as closed-ended meaning that it should not be interpreted to "include … …" only.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. The utility model provides an adjustable planetary gear support, includes body (1) that has centre bore (2), and body (1) evenly divide into a plurality of planetary gear stations along centre bore (2) circumference, is fixed with on each planetary gear station and is used for installing planetary gear's axis body (3), and characterized in that, all set up a shrink clearance (4) that radially extends along centre bore (2) between two adjacent planetary gear stations, shrink clearance (4) one end is closed, and the other end opening, shrink clearance (4) run through body (1) along centre bore (2) axial, still be equipped with the adjustment mechanism that is used for changing shrink clearance (4) width on body (1), adjustment mechanism and shrink clearance (4) one-to-one setting, through adjustment mechanism adjusting the width of corresponding shrink clearance (4) can make two planetary gear stations of both sides twist around centre bore (2) of above-mentioned, and the reverse of torsion direction of both; the adjusting mechanism comprises a pin shaft (6), the extending direction of the pin shaft (6) is consistent with the axial extending direction of the central hole (2), the outer diameter of the pin shaft (6) is gradually increased along the extending direction of the pin shaft, a pin hole (14) matched with the pin shaft (6) is formed in the position of the shrinkage gap (4), and the pin shaft (6) can axially move in the pin hole (14) to stretch the shrinkage gap (4) under the driving of a driving piece; the driving piece is a screw (7) in threaded connection with the pin shaft (6), the screw (7) is concentric with the pin shaft (6), a screw hole matched with the screw (7) is formed in the pin shaft (6), and the cross section shapes of the pin shaft (6) and the pin hole (14) are matched and are non-circular; the open end of the shrink gap (4) is located at the edge of the body (1).
2. The adjustable planetary gear carrier according to claim 1, wherein the shaft body (3) is provided with four, four corresponding shrinkage gaps (4) are provided with four shrinkage gaps (4), the shrinkage gaps (4) are arranged in pairs, the shrinkage gaps (4) in the same group are identical in extending direction, the shrinkage gaps (4) in the same group are identical in shrinkage, and the shrinkage gaps (4) in the adjacent shrinkage gaps are opposite in shrinkage.
3. An adjustable planetary gear carrier according to claim 1, characterized in that the pin (6) has a gradually increasing outer diameter during extension from the end of the screw (7) to the other end.
4. An adjustable planetary gear carrier according to claim 1, characterized in that the pin hole (14) is located at the periphery of the locus formed by the rotation of the center of the shaft body (3) relative to the center hole (2).
5. An adjustable planetary gear carrier according to claim 1, characterized in that the pin hole (14) is located close to the edge of the body (1).
6. An adjustable planetary gear carrier according to claim 1, characterized in that the closed end of the shrink gap (4) is provided with a notch (5), the width of the notch (5) is larger than the width of the shrink gap (4), and the notch (5) axially penetrates the body (1) along the central hole (2).
7. An adjustable planetary gear carrier according to claim 1, characterized in that the pin hole (14) is stepped, the head of the screw (7) resting against the step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910249633.9A CN109882585B (en) | 2019-03-29 | 2019-03-29 | Adjustable planetary gear support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910249633.9A CN109882585B (en) | 2019-03-29 | 2019-03-29 | Adjustable planetary gear support |
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| CN109882585A CN109882585A (en) | 2019-06-14 |
| CN109882585B true CN109882585B (en) | 2024-04-12 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709788A (en) * | 2021-01-08 | 2021-04-27 | 中国科学院宁波材料技术与工程研究所 | Planetary gear train clearance eliminating device based on flexible mechanism, speed reducer and robot joint |
| WO2023065072A1 (en) * | 2021-10-18 | 2023-04-27 | 爱磁科技（深圳）有限公司 | Displacement planetary carrier system and planetary transmission device thereof |
| CN115539619B (en) * | 2022-10-11 | 2023-10-03 | 爱磁精密(深圳)有限公司 | Planetary transmission device with deflection planet carrier system |
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| US4799396A (en) * | 1986-03-25 | 1989-01-24 | Machine Engineering Co., Ltd. | Reduction gear |
| CN1059122A (en) * | 1989-08-31 | 1992-03-04 | Ets兄弟公司 | Be used to make the nothing of the automotive seat each several part location hinged speed reduction gearing that dallies |
| JPH0732248U (en) * | 1993-11-22 | 1995-06-16 | 株式会社椿本チエイン | Backlash adjusting device for planetary gear mechanism |
| JPH09144818A (en) * | 1995-11-20 | 1997-06-03 | Kinichi Ogawa | Planetary gear device |
| US6099432A (en) * | 1997-09-09 | 2000-08-08 | Harmonic Drive Systems Inc. | Planetary gear device having a backlash adjusting mechanism |
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| DE102015007965A1 (en) * | 2015-06-22 | 2016-12-22 | Hans-Erich Maul | Play-free mini planetary gearbox |
| CN107110334A (en) * | 2014-06-07 | 2017-08-29 | 京特·齐默尔 | The planetary transmission minimized comprising two central gears and back lash |
| CN109505965A (en) * | 2018-11-26 | 2019-03-22 | 安徽大学 | A kind of planetary gear teeth side gap adjusting mechanism |
| CN209743560U (en) * | 2019-03-29 | 2019-12-06 | 浙江凡左科技有限公司 | Adjustable planetary gear support |
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2019
- 2019-03-29 CN CN201910249633.9A patent/CN109882585B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4799396A (en) * | 1986-03-25 | 1989-01-24 | Machine Engineering Co., Ltd. | Reduction gear |
| CN1059122A (en) * | 1989-08-31 | 1992-03-04 | Ets兄弟公司 | Be used to make the nothing of the automotive seat each several part location hinged speed reduction gearing that dallies |
| JPH0732248U (en) * | 1993-11-22 | 1995-06-16 | 株式会社椿本チエイン | Backlash adjusting device for planetary gear mechanism |
| JPH09144818A (en) * | 1995-11-20 | 1997-06-03 | Kinichi Ogawa | Planetary gear device |
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