CN210265708U - Floating planetary gear train structure for miniature precision planetary reducer - Google Patents
Floating planetary gear train structure for miniature precision planetary reducer Download PDFInfo
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- CN210265708U CN210265708U CN201921025656.3U CN201921025656U CN210265708U CN 210265708 U CN210265708 U CN 210265708U CN 201921025656 U CN201921025656 U CN 201921025656U CN 210265708 U CN210265708 U CN 210265708U
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- planet
- planet carrier
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- planetary gear
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Abstract
The utility model discloses a planetary gear train structure that floats for miniature accurate planetary reducer, including planet carrier, high-speed sun gear, low-speed sun gear, planet wheelset and ring gear, high-speed sun gear meshes with the planet wheelset mutually, and the ring gear meshes with the planet wheelset mutually, and the planet carrier is whole to be cage structure, and the planet wheelset is floating to be installed on cage planet carrier automatic adaptation interacvity and fit clearance, still includes the gasket, and its axial motion is restricted through cage planet carrier and gasket respectively at the both ends of planet wheelset. The utility model discloses the structure is exquisite compact, designs U-shaped ladder notch and annular open slot on cage planet carrier, and each planet wheel passes through round pin axle and the rotatory floating installation of bearing at U-shaped ladder notch to automatically, adapt to interaxial distance and fit clearance, make each planet wheel load even, guarantee that sun gear, planet wheel and ring gear meshing transmission are steady, and the operation is smooth and easy, noise reduction and temperature rise are difficult for appearing the problem of jamming or unbalance loading, and the reliability is high.
Description
Technical Field
The utility model relates to a planetary reducer technical field especially relates to a planetary gear train structure that floats for miniature accurate planetary reducer.
Background
A planetary reduction gear is a gear transmission element, is mainly used for increasing torque and reducing rotation speed in a transmission system, and is widely applied to various fields such as industry and automation, including a linear motion mechanism, an index plate, a mechanical arm, a printing device, a workbench, a robot spindle, a conveying device, and the like.
The miniature precision planetary reducer has small part size and high machining precision requirement on each part, otherwise, the transmission requirement of the precision planetary reducer is difficult to meet, the planetary gear load is uneven, the noise and temperature rise of the reducer are caused, and the machining cost of the miniature precision planetary reducer is increased.
The prior art Chinese utility model patent CN 208089877U discloses a planetary reducer structure, which adopts a small-gap suspension design to ensure that the gap of each meshing surface is automatically corrected, the stress is uniform, and the bearing capacity is high; the invention also discloses a planetary reducer structure, in which cylindrical pins with reserved gaps are arranged in a circular gear ring and a shell hole, when a planet wheel is unbalanced in load, an inner gear and a planet wheel carrier automatically float until the load is uniformly distributed among the planet gears, so that the reliability of the planetary reducer is effectively improved.
Therefore, in order to overcome not enough and defect among the background art, the utility model provides a planet gear train structure that floats for miniature accurate planetary reducer, through the design of the U-shaped ladder notch that cage planet carrier has for the automatic center-to-center spacing and the cooperation clearance of adaptation of planet wheel that floats, each planet wheel load of guaranteeing is balanced, can effectively restrict the axial motion of planet wheel round pin axle moreover, guarantees that the meshing transmission is steady, and the noise reduction is difficult for jamming or unbalance loading.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a planetary gear train structure that floats for miniature accurate planetary reducer, under current throughput and assembly process level, reduce miniature planetary reducer's noise and temperature rise.
The utility model discloses a realize through following technical scheme:
the utility model provides a planet gear train structure that floats for miniature accurate planetary reducer, includes around the rotatory planet carrier of fixed axle, installs high-speed sun gear, low-speed sun gear and planet wheelset on the planet carrier and with casing fixed connection's ring gear, high-speed sun gear and low-speed sun gear coaxial arrangement are on the planet carrier, high-speed sun gear meshes with the planet wheelset mutually, the ring gear meshes with the planet wheelset mutually, the whole cage structure that is of planet carrier, the planet wheelset is floating to be installed on cage planet carrier automatic adaptation interacvity and cooperation clearance, still includes the gasket, and its axial motion is restricted through cage planet carrier and gasket respectively at the both ends of planet wheelset.
Furthermore, the planet wheel set comprises a plurality of planet wheel units, the planet wheel units are uniformly distributed around the circumference of the high-speed sun wheel, a pin shaft and a needle roller bearing are installed in an inner hole of each planet wheel unit, and the planet wheel units, the pin shafts and the needle roller bearings form an assembly and are installed on the cage type planet carrier in an assembly mode.
Further, the outer fringe of cage planet carrier has the multiunit U-shaped groove with the free quantity looks adaptation of planet wheel, and a plurality of planet wheel monomers pass through the floating installation of U-shaped groove on cage planet carrier, through the clearance of the floating adjustment a plurality of planet wheel monomers and high-speed sun gear and ring gear.
Furthermore, a plurality of annular open grooves are formed in the positions, corresponding to the U-shaped grooves, of the cage type planet carrier, the plurality of planet wheel single bodies are assembled with pin shafts and needle bearings and are assembled into the cage type planet carrier from the annular open grooves in an assembly mode, the plurality of planet wheel single bodies rotate around the pin shafts, are meshed with the inner gear ring and revolve around the high-speed sun wheel rotation center to drive the cage type planet carrier to rotate.
Furthermore, the single planet wheel unit is assembled on a needle bearing, the needle bearing is assembled on the outer cylindrical surface of a pin shaft, and the pin shaft is assembled in a U-shaped groove of the cage planet carrier.
Furthermore, the two ends of the pin shaft assembled on the planet wheel single body limit the axial movement of the pin shaft through a U-shaped groove and a gasket on the cage type planet carrier respectively.
Furthermore, the single group of U-shaped groove comprises 2U-shaped notches, the 2U-shaped notches are communicated with the annular open groove, and the inner wall of each U-shaped notch is provided with a step to form a U-shaped stepped notch so as to limit axial movement of one end of the pin shaft.
Further, the gasket is installed on one side of cage planet carrier and is perpendicular with the rotation center of sun gear in order to restrict the axial float of the other end of round pin axle.
Furthermore, the inner gear ring is of an integral through hole type structure.
The utility model has the advantages that: the utility model discloses the structure is exquisite compact, design U-shaped ladder notch and annular open slot on cage planet carrier, each planet wheel passes through round pin axle and the rotatory floating installation of bearing at U-shaped ladder notch, with automatic adaptation interaxial distance and fit clearance, make each planet wheel load even, and can effectively restrict the axial motion of planet wheel round pin axle, guarantee sun gear, planet wheel and ring gear meshing transmission steady, the operation is smooth and easy, noise reduction and temperature rise, the difficult problem that jamming or unbalance loading appear, the reliability is high.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a front view of fig. 1.
Fig. 4 is a schematic cross-sectional view taken along line a-a of fig. 3.
Fig. 5 is a top view of fig. 1.
Fig. 6 is a schematic cross-sectional view taken along line B-B of fig. 5.
Fig. 7 is a schematic structural diagram of the planet carrier of the present invention.
Fig. 8 is a top view of fig. 7.
Fig. 9 is a front view of fig. 7.
Fig. 10 is a schematic cross-sectional view taken along line C-C of fig. 9.
Fig. 11 is a right side view of fig. 7.
Fig. 12 is a schematic cross-sectional view taken along line D-D of fig. 11.
Wherein:
1. a planet carrier;
11. a U-shaped groove;
111. a U-shaped notch;
1111. a step;
12. an annular open slot;
2. a high-speed sun gear;
3. a low speed sun gear;
4. a planetary gear set;
41. a planet wheel monomer;
5. an inner gear ring;
6. a gasket;
7. a pin shaft;
8. a needle bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1 to 6, the floating planetary gear train structure for a miniature precision planetary reducer of the present invention is a 2Z-X negative sign structure, and has a degree of freedom for simple planetary gear transmission, a transmission ratio of 3 to 10, and the same input and output rotation directions, and includes a planet carrier 1 rotating around a fixed shaft, a high-speed sun gear 2, a low-speed sun gear 3 and a planetary gear set 4 mounted on the planet carrier 1, and an inner gear ring 5 fixedly connected to a housing, the high-speed sun gear 2 and the low-speed sun gear 3 being coaxially mounted on the planet carrier 1, the high-speed sun gear 2 being engaged with the planetary gear set 4, the inner gear ring 5 being engaged with the planetary gear set 4, the planet carrier 1 being a cage structure as a whole, the floating planetary gear set 4 being mounted on the cage planet carrier 1 to automatically adapt to the center distance and the fit gap, and further including a gasket 6, the two ends of the planetary wheel set 4 are respectively limited in axial movement by the cage type planet carrier 1 and the gasket 6.
In this embodiment, the planetary gear set 4 includes a plurality of planetary gear units 41, the plurality of planetary gear units 41 are uniformly distributed around the circumference of the high-speed sun gear 2, the pin 7 and the needle bearing 8 are installed in the inner hole of the single planetary gear unit 41, and the planetary gear unit 41, the pin 7 and the needle bearing 8 form an assembly and are installed on the cage planet carrier 1 in the form of an assembly.
As shown in fig. 7 to 12 do the utility model relates to a cage planet carrier structure that a planetary gear train structure that floats for miniature accurate planetary reducer contains, cage planet carrier 1's outer fringe has the multiunit U-shaped groove 11 with planetary gear monomer 41's quantity looks adaptation, a plurality of planetary gear monomer 41 are installed on cage planet carrier 1 through U-shaped groove 11 is floating, through the clearance of floating adjustment a plurality of planetary gear monomer 41 and high-speed sun gear 2 and ring gear 5, through U-shaped groove 11 on cage planet carrier 1, the meshing centre-to-centre spacing that realizes that floating of planetary gear monomer 41 controls planetary gear monomer 41 and sun gear and ring gear 5 each row, guarantee each row of planetary gear monomer 41 load balance, the operation is smooth and easy, reduce noise in operation and temperature rise.
In the embodiment, the cage type planet carrier 1 is provided with a plurality of annular open grooves 12 at positions corresponding to the U-shaped grooves 11, a plurality of planet wheel single bodies 41 are assembled with pin shafts 7 and needle roller bearings 8 and are assembled into the cage type planet carrier 1 from the annular open grooves 12 in an assembly mode, the plurality of planet wheel single bodies 41 rotate around the pin shafts 7, are engaged with the inner gear ring 5 and revolve around the rotation center of the high-speed sun wheel 2 to drive the cage type planet carrier 1 to rotate;
the two sides of the annular open groove 12 are parallel, the upper plane and the lower plane of the planet wheel single body 41 are respectively parallel to the two sides of the annular open groove 12, the annular open groove 12 limits the axial movement of the planet wheel single body 41, and the upper plane and the lower plane are guaranteed to be always parallel in the operation process of the planet wheel single body 41.
In the embodiment, a single planet wheel monomer 41 is assembled on a needle roller bearing 8, the needle roller bearing 8 is assembled on the outer cylindrical surface of a pin shaft 7, the pin shaft 7 is assembled in a U-shaped groove 11 of a cage type planet carrier 1, an inner hole of the planet wheel monomer 41 is assembled in the pin shaft 7 and supported by the needle roller bearing 8, the pin shaft 7 can move along the direction of the circumferential radius, so that the planet wheel monomer 41 in the structure floats, the meshing clearance between the planet wheel monomer 41 and a high-speed sun wheel 2 and an inner gear ring 5 is adjusted, and the balance of the load of each planet wheel monomer 41 is ensured;
the two ends of a pin shaft 7 which is singly assembled on the planet wheel single body 41 limit the axial movement of the pin shaft respectively through a U-shaped groove 11 and a gasket 6 on the cage type planet carrier 1;
more specifically, the single group of U-shaped grooves 11 includes 2U-shaped notches 111, the 2U-shaped notches 111 are communicated with the annular open groove 12, and the inner wall of the single U-shaped notch 111 is provided with a step 1111 to form a U-shaped stepped notch to limit axial movement of one end of the pin 7, and the single U-shaped notch is not radially limited and can float in the radial direction;
the gasket 6 is arranged on one side of the cage type planet carrier 1 and is vertical to the rotation center of the sun gear so as to limit the axial movement of the other end of the pin shaft 7, the gasket 6 can be made of polytetrafluoroethylene, but the utility model is not limited by the above;
in addition, the arrangement of the needle roller bearing 8 ensures that the planet wheel single body 41 can freely rotate around the pin shaft.
In this embodiment, the inner gear ring 5 is of an integral through hole type structure, so as to ensure the processing precision and the rigidity, the inner gear ring 5 is of an annular structure, the inner ring is a tooth part, the radial movement of the planet wheel single body 41 can be limited, the planet wheel single body 41 rolls around the inner gear ring 5, and the torque is transmitted to the planet carrier 1 through the pin shaft 7 and the needle bearing 8 to be output.
The utility model has the advantages that: the utility model discloses the structure is exquisite compact, design U-shaped ladder notch and annular open slot on cage planet carrier, each planet wheel passes through round pin axle and the rotatory floating installation of bearing at U-shaped ladder notch, with automatic adaptation interaxial distance and fit clearance, make each planet wheel load even, and can effectively restrict the axial motion of planet wheel round pin axle, guarantee sun gear, planet wheel and ring gear meshing transmission steady, the operation is smooth and easy, noise reduction and temperature rise, the difficult problem that jamming or unbalance loading appear, the reliability is high.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a planetary gear train structure that floats for miniature precision planetary reducer which characterized in that: including around the rotatory planet carrier of fixed axle, install high-speed sun gear, low-speed sun gear and planet wheelset on the planet carrier and with casing fixed connection's ring gear, high-speed sun gear and low-speed sun gear coaxial arrangement are on the planet carrier, high-speed sun gear meshes with the planet wheelset mutually, the ring gear meshes with the planet wheelset mutually, the planet carrier is whole to be cage structure, and the planet wheelset is floating to be installed on cage planet carrier automatic adaptation center interval and cooperation clearance, still includes the gasket, and its axial motion is restricted through cage planet carrier and gasket respectively at the both ends of planet wheelset.
2. The floating planetary gear train structure for the miniature precision planetary reducer as set forth in claim 1, wherein: the planet wheel set comprises a plurality of planet wheel monomers, the planet wheel monomers are uniformly distributed around the circumference of the high-speed sun wheel, a single inner hole of each planet wheel monomer is provided with a pin shaft and a needle roller bearing, and the planet wheel monomers, the pin shafts and the needle roller bearings form an assembly and are arranged on the cage type planet carrier in an assembly mode.
3. The floating planetary gear train structure for the miniature precision planetary reducer as set forth in claim 2, wherein: the outer fringe of cage planet carrier has the multiunit U-shaped groove with the free quantity looks adaptation of planet wheel, and a plurality of planet wheel monomers pass through the floating installation of U-shaped groove on the cage planet carrier, through the clearance of floating a plurality of planet wheel monomers of adjustment and high-speed sun gear and ring gear.
4. The floating planetary gear train structure for the miniature precision planetary reducer as set forth in claim 3, wherein: the multi-planetary-gear-type solar cell comprises a cage type planet carrier, and is characterized in that a plurality of annular open grooves are formed in the position, corresponding to the U-shaped groove, of the cage type planet carrier, a plurality of planetary gear single bodies are assembled with pin shafts and needle bearings and are assembled into the cage type planet carrier from the annular open grooves in an assembly mode, the plurality of planetary gear single bodies rotate around the pin shafts, are meshed with an inner gear ring and revolve around a high-speed.
5. The floating planetary gear train structure for the miniature precision planetary reducer as set forth in claim 4, wherein: the single planet wheel monomer is assembled on a needle roller bearing, the needle roller bearing is assembled on the outer cylindrical surface of a pin shaft, and the pin shaft is assembled in a U-shaped groove of the cage planet carrier.
6. The floating planetary gear train structure for the miniature precision planetary reducer as set forth in claim 5, wherein: and the two ends of the single pin shaft assembled on the planet wheel monomer limit the axial movement of the single pin shaft through a U-shaped groove and a gasket on the cage type planet carrier respectively.
7. The floating planetary gear train structure for the miniature precision planetary reducer as set forth in claim 6, wherein: the single U-shaped groove comprises 2U-shaped notches, the 2U-shaped notches are communicated with the annular open groove, and the inner wall of each U-shaped notch is provided with a step to form a U-shaped stepped notch so as to limit axial movement of one end of the pin shaft.
8. The floating planetary gear train structure for the miniature precision planetary reducer as set forth in claim 6, wherein: the gasket is installed in one side of cage planet carrier and is perpendicular with the rotation center of sun gear in order to restrict the axial float of round pin axle other end.
9. The floating planetary gear train structure for the miniature precision planetary reducer as set forth in claim 1, wherein: the inner gear ring is of an integral through hole type structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921025656.3U CN210265708U (en) | 2019-07-03 | 2019-07-03 | Floating planetary gear train structure for miniature precision planetary reducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921025656.3U CN210265708U (en) | 2019-07-03 | 2019-07-03 | Floating planetary gear train structure for miniature precision planetary reducer |
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| CN210265708U true CN210265708U (en) | 2020-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159710A (en) * | 2019-07-03 | 2019-08-23 | 浙江大学昆山创新中心 | A kind of floating planet gear architecture for Miniature precision planetary reducer |
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2019
- 2019-07-03 CN CN201921025656.3U patent/CN210265708U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159710A (en) * | 2019-07-03 | 2019-08-23 | 浙江大学昆山创新中心 | A kind of floating planet gear architecture for Miniature precision planetary reducer |
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