CN110925409B - Elastic anti-backlash reducer for planetary gear - Google Patents
Elastic anti-backlash reducer for planetary gear Download PDFInfo
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- CN110925409B CN110925409B CN201911408499.9A CN201911408499A CN110925409B CN 110925409 B CN110925409 B CN 110925409B CN 201911408499 A CN201911408499 A CN 201911408499A CN 110925409 B CN110925409 B CN 110925409B
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- gear
- planet
- floating
- ring
- gear ring
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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
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
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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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/70—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to the field of precision transmission, in particular to an elastic backlash eliminating reducer for a planetary gear, which can eliminate transmission backlash and improve transmission precision. The utility model provides a planet gear elasticity crack reduction gear that disappears, the epaxial two sets of planet wheels that are equipped with of planet, the ring gear includes fixed ring gear and unsteady ring gear, fixed ring gear and unsteady ring gear mesh with different planet wheels respectively, unsteady ring gear clearance is installed in the casing to connect unsteady adjusting device. Two groups of gear rings are meshed with two groups of planet gears, the position of the floating gear ring is changed through the floating adjusting device, the floating gear ring and the fixed gear ring generate deflection angles, and then the two groups of planet gears are driven to deflect and are respectively in contact meshing with different sides of the upper teeth of the sun gear, so that gaps in a transmission chain are eliminated, and transmission precision is improved.
Description
Technical Field
The invention relates to the field of precision transmission, in particular to an elastic backlash eliminating reducer for a planetary gear.
Background
In the development process of the numerical control machine tool, higher and higher requirements are put forward on the high speed and the greening of the machine tool. The high-speed and green production of the machine tool can be realized by not only adopting high-speed processing, but also increasing the number of the main shafts to realize the arraying of the machine tool. The structure and the operation mode of the array machine tool are close to those of a single-spindle machine tool, the processing flexibility is high, the product batches can be converted in a short time, and the current requirements of part production enterprises are met. The rotary worktable of the array machine tool is required to have the characteristics of small volume, high precision, large torque and the like. The common worm and gear drive and direct drive cannot simultaneously meet all technical requirements of the arrayed rotary worktable, and restrict the development of the array machine tool to the direction of the miniaturization of the distance between the main shafts and the expansion of the array scale. Although the traditional planetary reducer can meet the volume requirement of an array turntable, the return error of the reducer is large, and the requirement of high-precision development of a rotary worktable cannot be met. Therefore, a machine tool speed reducer which simultaneously considers the volume and the precision of the rotary table is lacked at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the elastic backlash eliminating reducer for the planetary gear, which can eliminate the transmission backlash and improve the transmission precision.
The scheme provided by the invention is as follows:
the utility model provides a planetary gear elasticity crack reduction gear that disappears, includes casing, sun gear, planet carrier and planet wheel, be equipped with the ring gear in the casing, sun gear, planet wheel mesh with the ring gear in proper order, sun gear and input shaft, planet wheel pass through the planet axle and set up on the planet carrier, planet carrier and output shaft to rotationally install on the casing, the epaxial two sets of planet wheels that are equipped with of planet, the ring gear is including fixed ring gear and unsteady ring gear, fixed ring gear meshes with the planet wheel of difference respectively with unsteady ring gear, unsteady ring gear clearance is installed in the casing to connect unsteady adjusting device. Two groups of gear rings are meshed with two groups of planet gears, the position of the floating gear ring is changed through the floating adjusting device, the floating gear ring and the fixed gear ring generate deflection angles, and then the two groups of planet gears are driven to deflect and are respectively in contact meshing with different sides of the upper teeth of the sun gear, so that gaps in a transmission chain are eliminated, and transmission precision is improved.
Preferably, the floating adjusting device comprises a limiting part and an adjusting piece, the limiting part is arranged on the floating gear ring, the adjusting piece is arranged on the shell, and the limiting part is connected with the adjusting piece. The adjusting piece can change the relative rotation angle of the floating gear ring and the fixed gear ring through the limiting part and adjust the gap in the transmission chain.
Preferably, the floating gear ring is provided with a fixed pin shaft, the limiting part is arranged at one end of the pin shaft, and the adjusting part is a screw;
the limiting part is a groove, and the end part of the screw is provided with a bulge matched with the groove;
or, the limiting part is a protrusion, and the end part of the screw is provided with a groove matched with the protrusion. By adopting the matching of the groove and the bulge, the floating gear ring can receive circumferential force by screwing the screw, so that the floating gear ring rotates.
Preferably, the surfaces of the protrusion and the groove are conical surfaces. The conical surface is convenient for generating lateral component force on the floating gear ring when the screw axially moves so as to enable the floating gear ring to rotate.
Preferably, the axis of the stop portion is not collinear with the axis of the screw. The pushing effect is better when the axis of the limiting part is not collinear with the axis of the screw.
Preferably, the end part of the shell is provided with an adjusting hole, and the position of the adjusting hole is matched with the position of the screw. When adjusting reduction gear inner gearing clearance, need not dismantle the reduction gear, directly can come control screw through the adjustment hole.
Preferably, the floating gear ring is provided with a spacer bush on the radial outer side, and the axial length of the spacer bush is greater than that of the floating gear ring. The width of the gasket is larger than that of the floating gear ring, so that a gap can be reserved in the shell of the floating gear ring, and the floating gear ring is convenient to adjust.
Preferably, the speed reducer adopts a multi-stage planetary speed reducing structure, the shell is divided into a plurality of sections along the axial direction, and the number of the sections of the shell is the same as the number of the speed reducing stages. The shell adopts a segmented structure to facilitate the assembly of the internal structure.
The invention is provided with the floating gear ring, and the teeth of the two groups of planet gears are respectively contacted with different sides of the teeth of the sun gear by controlling the difference of the rotating angles between the floating gear ring and the fixed gear ring, thereby realizing gapless meshing, eliminating transmission gaps and improving transmission precision.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side schematic view of the present invention;
FIG. 3 is a schematic view of the connection between the position-limiting portion and the screw;
FIG. 4 is a schematic view of another embodiment of the present invention;
in the figure, 1-shell, 2-sun gear, 3-planet carrier, 4-planet gear, 5-planet shaft, 6-fixed gear ring, 7-floating gear ring, 8-limiting part, 9-screw, 10-pin shaft, 11-adjusting hole and 12-spacer bush.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1 to fig. 3, the present embodiment provides a planetary gear elastic backlash elimination reducer, which includes a housing 1, a sun gear 2, a planet carrier 3 and planet gears 4, a gear ring is disposed in the housing 1, the sun gear 2, the planet gears 4 are sequentially engaged with the gear ring, the sun gear 2 is connected with an input shaft, the planet gears 4 are disposed on the planet carrier 3 through a planet shaft 5, the planet carrier 3 is connected with an output shaft, and is rotatably mounted on the housing 1, two sets of planet gears 4 are disposed on the planet shaft 5, the gear ring includes a fixed gear ring 6 and a floating gear ring 7, the fixed gear ring 6 and the floating gear ring 7 are respectively engaged with different planet gears 4, and the floating gear ring 7 is mounted in the housing 1 in a.
The floating adjusting device comprises a limiting part 8 and an adjusting piece, the floating gear ring 7 is provided with a fixed pin shaft 10, the limiting part 8 is arranged at one end of the pin shaft 10, the adjusting piece is a screw 9 and is arranged on the shell 1, and the limiting part 8 is in contact connection with the tail end of the adjusting screw 9.
The limiting part 8 is a groove, and the end part of the screw 9 is provided with a bulge matched with the groove. The surfaces of the protrusion and the groove are conical surfaces. The axis of the limiting part 8 is not collinear with the axis of the screw 9.
In other embodiments of the present invention, the position-limiting part 8 may be a protrusion, and the end of the screw 9 is provided with a groove adapted to the protrusion.
The end of the shell 1 is provided with an adjusting hole 11, and the position of the adjusting hole 11 is matched with the position of the screw 9.
The floating gear ring 7 is provided with a spacer 12 at the radial outer side, and the axial length of the spacer 12 is larger than that of the floating gear ring 7.
The working principle of the invention is as follows:
power is transmitted to the sun gear 2 from the input shaft, the sun gear 2 drives the planet carrier 3 and the planet gear 4 to rotate, and the power is transmitted outwards from the planet carrier 3. Certain gaps exist among the sun wheel 2, the planet wheel 4 and the gear ring in the rotating process, and the transmission precision can be influenced by the gaps. The screw 9 is screwed, the screw 9 moves towards the inside of the shell 1 and props against the groove of the limiting part 8, so that the limiting part 8 generates certain deviation, the floating gear ring 7 is driven to rotate at a small angle, and a group of planet wheels 4 meshed with the floating gear ring 7 are driven to rotate as well, so that the teeth of the two groups of planet wheels 4 are respectively contacted with different sides of the teeth of the sun wheel 2, the sun wheel 2 can transmit power to the planet wheels 4 without gaps no matter the sun wheel 2 rotates forwards or overturns, and the anti-backlash transmission is realized.
Example two
As shown in fig. 4, in this embodiment, the transmission device adopts a multi-stage planetary reduction structure, the housing 1 is divided into multiple sections along the axial direction, and the number of the sections of the housing 1 is the same as the number of the transmission stages. The other parts of this embodiment are substantially the same as those of the first embodiment.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a planetary gear elasticity crack reduction gear that disappears, includes casing (1), sun gear (2), planet carrier (3) and planet wheel (4), be equipped with the ring gear in casing (1), sun gear (2), planet wheel (4) mesh with the ring gear in proper order, sun gear (2) and input shaft are connected, and planet wheel (4) set up on planet carrier (3) through planet axle (5), and planet carrier (3) are connected with the output shaft to rotationally install on casing (1), its characterized in that: two groups of planet gears (4) are arranged on the planet shaft (5), the gear ring comprises a fixed gear ring (6) and a floating gear ring (7), the fixed gear ring (6) and the floating gear ring (7) are respectively meshed with different planet gears (4), and the floating gear ring (7) is arranged in the shell (1) in a clearance mode and is connected with a floating adjusting device;
the floating adjusting device comprises a limiting part (8) and an adjusting piece, the limiting part (8) is arranged on the floating gear ring (7), the adjusting piece is arranged on the shell (1), and the limiting part (8) is connected with the adjusting piece;
the floating gear ring (7) is provided with a fixed pin shaft (10), the limiting part (8) is arranged at one end of the pin shaft (10), and the adjusting part is a screw (9);
the limiting part (8) is a groove, and a bulge matched with the groove is arranged at the end part of the screw (9);
or the limiting part (8) is a protrusion, and the end part of the screw (9) is provided with a groove matched with the protrusion.
2. The planetary gear elastic backlash reducer according to claim 1, wherein: the surfaces of the protrusion and the groove are conical surfaces.
3. A planetary gear elastic backlash reducer according to claim 1 or 2, wherein: the axis of the limiting part (8) is not collinear with the axis of the screw (9).
4. A planetary gear elastic backlash reducer according to claim 1 or 2, wherein: the end part of the shell (1) is provided with an adjusting hole (11), and the position of the adjusting hole (11) is matched with the position of the screw (9).
5. The planetary gear elastic backlash reducer according to claim 1, wherein: the floating gear ring (7) is provided with a spacer bush (12) along the radial outer side, and the axial length of the spacer bush (12) is greater than that of the floating gear ring.
6. The planetary gear elastic backlash reducer according to claim 1, wherein: the speed reducer adopts a multi-stage planetary speed reducing structure, the shell (1) is axially divided into a plurality of sections, and the number of the sections of the shell (1) is the same as the number of speed reducing stages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911408499.9A CN110925409B (en) | 2019-12-31 | 2019-12-31 | Elastic anti-backlash reducer for planetary gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911408499.9A CN110925409B (en) | 2019-12-31 | 2019-12-31 | Elastic anti-backlash reducer for planetary gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110925409A CN110925409A (en) | 2020-03-27 |
| CN110925409B true CN110925409B (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911408499.9A Active CN110925409B (en) | 2019-12-31 | 2019-12-31 | Elastic anti-backlash reducer for planetary gear |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE528603A (en) * | 1954-04-09 | Charles Berthiez Ets | ||
| FR2580760B1 (en) * | 1985-04-19 | 1990-03-02 | Maag France | METHOD AND DEVICE FOR REDUCING THE RADIAL OPERATING GAME BETWEEN TWO PARTS ENGAGED IN ONE ANOTHER AND DRIVEN BY A ROTATION MOVEMENT IN RELATION TO THE OTHER AND SPEED REDUCER "WITHOUT GAME" OBTAINED AT L HELP OF THIS PROCESS |
| DE8611098U1 (en) * | 1986-04-23 | 1986-07-03 | Pfeffer, Fritz, 69168 Wiesloch | Planetary gear |
| DE10110282A1 (en) * | 2001-03-02 | 2002-09-05 | Maxon Motor Gmbh | planetary gear |
| CN104728354B (en) * | 2015-04-02 | 2017-08-25 | 葛立志 | Precompressed compensates the gap reductor that disappears |
| CN105508585B (en) * | 2016-01-20 | 2018-01-19 | 湖北科峰传动设备有限公司 | One kind disappears gap planetary reducer |
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2019
- 2019-12-31 CN CN201911408499.9A patent/CN110925409B/en active Active
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| CN110925409A (en) | 2020-03-27 |
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