CN210859703U - Planetary transmission structure for small-speed-ratio planetary reducer - Google Patents
Planetary transmission structure for small-speed-ratio planetary reducer Download PDFInfo
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- CN210859703U CN210859703U CN201921156776.7U CN201921156776U CN210859703U CN 210859703 U CN210859703 U CN 210859703U CN 201921156776 U CN201921156776 U CN 201921156776U CN 210859703 U CN210859703 U CN 210859703U
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Abstract
The utility model discloses a little velocity ratio planetary reducer is with planetary transmission structure, include: a combined planet carrier and sun gear; the combination formula planet carrier includes: the wedge block fixing device comprises an upper frame, a plurality of wedge blocks, a lower frame and a plurality of fasteners for fixing the wedge blocks, the upper frame and the lower frame into a whole; the wedge block is arranged between the upper frame and the lower frame and is connected with the upper frame and the lower frame; the combined planet carrier defines a central axis; the wedges are distributed in the circumferential direction of the central axis; the distance between two wedges adjacent in the circumferential direction of the central axis is smaller than the diameter of the sun wheel. The utility model discloses a little velocity ratio planetary reducer is with planetary transmission structure solves little velocity ratio planetary transmission mechanism's sun gear installation problem.
Description
Technical Field
The utility model relates to a little velocity ratio planetary reducer is with planetary transmission structure.
Background
Traditional planet carrier formula casting member as an organic whole, the both ends flange is connected by the gusset in the middle of, fills into it from the gap between two gussets when installation sun gear and carries out the installation of other round pin axles or planet wheel again. However, the sun gear can be placed only when the diameter of the sun gear is smaller than the width of a gap between two rib plates, so that the radial size of the sun gear is relatively required to be small, and the planetary gear ratio is high.
For a planetary transmission structure with a small speed ratio, the traditional structure cannot meet the installation requirement.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a little velocity ratio planetary gear is planetary gear structure for speed reducer solves the unable drive mechanism's that realizes little velocity ratio installation of traditional planetary gear structure.
In order to achieve the above object, the utility model adopts the following scheme:
a planetary transmission structure for a small-ratio planetary reduction gear, comprising: a combined planet carrier and sun gear; the combination formula planet carrier includes: the wedge block fixing device comprises an upper frame, a plurality of wedge blocks, a lower frame and a plurality of fasteners for fixing the wedge blocks, the upper frame and the lower frame into a whole; the wedge block is arranged between the upper frame and the lower frame and is connected with the upper frame and the lower frame; the combined planet carrier defines a central axis; the wedges are distributed in the circumferential direction of the central axis; the distance between two wedges adjacent in the circumferential direction of the central axis is smaller than the diameter of the sun wheel.
Further, the fastener is a forged bolt; the forged bolt penetrates through the upper frame and the wedge block and then is fixed to the lower frame.
Further, the number of forged bolts passed through the same wedge is 2 or more.
Furthermore, the same wedge block is fixed to the upper frame and the lower frame through two forging bolts; the number of forged bolts is 2 times the number of wedges.
Further, the number of fasteners is 6; the number of wedges is 3; the 3 wedges are evenly arranged in the circumferential direction of the central axis.
Further, a first plane is erected on the upper frame; the lower frame is provided with a second plane; the first plane is parallel to the second plane; the wedge is located between the first plane and the second plane.
Further, the sun gear is provided with a shaft portion; the lower frame is formed with a shaft hole into which the shaft portion is inserted.
Further, the shaft portion is provided with a spline structure.
Further, the planetary transmission structure for the small-speed-ratio planetary reducer further comprises: a planet wheel; the planet wheels are rotatably mounted to the combined planet carrier; the planet wheel is meshed with the sun wheel.
Further, the number of planets is equal to the number of wedges; in the circumferential direction of the central axis, the planet wheels and the wedge blocks are arranged at intervals.
The utility model discloses an useful part lies in, can solve little velocity ratio planetary drive mechanism's sun gear installation problem to the application scenario and the application field of planetary drive structure have been widened. The part processing technology is simple, the installation is flexible, the assembly and disassembly are convenient, and the batch processing can be exchanged. The strength is high, the rigidity is good, the stress points of the planet carrier are all on the forging bolts, and the forging bolts are forgings and have better plasticity and mechanical properties. The traditional planet carrier is a casting part or a welding part, the strength is weak, the rigidity is poor, the planet carrier is easy to crack, the precision requirement can be guaranteed by the connection of forging bolts, and the strength of the planet carrier is improved.
Drawings
Fig. 1 is a front view of a planetary transmission structure for a small-ratio planetary reduction gear of the present invention;
FIG. 2 is a right side view of the planetary transmission arrangement for the low ratio planetary reduction gear of FIG. 1;
FIG. 3 is a cross-sectional view of the structure of FIG. 2 taken along line A-A;
fig. 4 is an exploded view of the structure of fig. 3.
The planetary transmission structure 100 for the small-speed-ratio planetary reducer comprises a combined planet carrier 10, an upper carrier 11, a wedge block 12, a lower carrier 13, a fastener 14, a sun gear 20 and a planet gear 30.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 4, a planetary gear structure 100 for a small-ratio planetary reduction gear includes: a combined planet carrier 10 and sun gear 20. The combined planetary carrier 10 includes: an upper frame 11, a plurality of wedges 12, a lower frame 13 and a plurality of fasteners 14. A plurality of fasteners 14 integrally secure the wedge 12, the upper frame 11 and the lower frame 13.
The wedge 12 is disposed between the upper frame 11 and the lower frame 13 and connects the upper frame 11 and the lower frame 13. The compound planet carrier 10 defines a central axis. Several wedges 12 are arranged in the circumferential direction of the centre axis. The distance between two wedges 12 adjacent in the circumferential direction of the central axis is smaller than the diameter of the sun gear 20. When mounting, the sun gear 20 is first placed between the upper and lower frames 11 and 13. The upper frame 11, wedge 12 and lower frame 13 are then secured by fasteners 14.
In one specific embodiment, the fastener 14 is a forged bolt. The forged bolt is fixed to the lower frame 13 after passing through the upper frame 11 and the wedge 12. The number of forging bolts passing through the same wedge 12 is 2 or more. Specifically, the number of forging bolts passing through the same wedge 12 is 2. The same wedge 12 is fixed to the upper frame 11 and the lower frame 13 by two forged bolts. The number of forged bolts is 2 times the number of wedges 12.
Specifically, the number of fasteners 14 is 6. The number of wedges 12 is 3. The 3 wedges 12 are evenly arranged in the circumferential direction of the centre axis.
The upper frame 11 is provided with a first plane. The lower frame 13 is provided with a second plane. The first plane is parallel to the second plane. The wedge 12 is located between the first plane and the second plane. Both ends of the wedge 12 contact the first and second flat surfaces, respectively.
In a preferred embodiment, the sun gear 20 is provided with a shaft portion. The shaft part is provided with a spline structure. Connected with the shaft through a spline structure. The lower frame 13 is formed with a shaft hole into which the shaft portion is inserted.
The planetary transmission structure 100 for the small-speed-ratio planetary reduction gear further includes: a planet wheel 30. The planet wheels 30 are rotatably mounted to the compound planet carrier 10. The planet wheels 30 mesh with the sun wheel 20. The number of planet wheels 30 is equal to the number of wedges 12. The number of planet wheels 30 is 3. The planet wheels 30 and the wedge 12 are arranged spaced apart in the circumferential direction of the centre axis.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a planetary transmission structure for low-speed ratio planetary reducer which characterized in that includes: a combined planet carrier and sun gear; the combined planet carrier comprises: the wedge block type wedge block fixing device comprises an upper frame, a plurality of wedge blocks, a lower frame and a plurality of fasteners for fixing the wedge blocks, the upper frame and the lower frame into a whole; the wedge block is arranged between the upper frame and the lower frame and is connected with the upper frame and the lower frame; the combined planet carrier defines a central axis; a plurality of the wedges are arranged in the circumferential direction of the central axis; the distance between two of the wedges adjacent in the circumferential direction of the central axis is smaller than the diameter of the sun gear.
2. The planetary drive structure for a small-ratio planetary reduction gear according to claim 1,
the fastener is a forged bolt; the forging bolt penetrates through the upper frame and the wedge block and then is fixed to the lower frame.
3. The planetary drive structure for a small-ratio planetary reduction gear according to claim 2,
the number of forging bolts passing through the same wedge is greater than or equal to 2.
4. The planetary drive structure for a small-ratio planetary reduction gear according to claim 2,
the same wedge block is fixed to the upper frame and the lower frame through two forged bolts; the number of forged bolts is 2 times the number of wedges.
5. The planetary drive structure for a small-ratio planetary reduction gear according to claim 1,
the number of the fasteners is 6; the number of the wedges is 3; the 3 wedges are evenly arranged in the circumferential direction of the central axis.
6. The planetary drive structure for a small-ratio planetary reduction gear according to claim 1,
the upper frame is provided with a first plane; the lower frame is provided with a second plane; the first plane is parallel to the second plane; the wedge is located between the first plane and the second plane.
7. The planetary drive structure for a small-ratio planetary reduction gear according to claim 1,
the sun wheel is provided with a shaft part; the lower frame is formed with a shaft hole into which the shaft portion is inserted.
8. The planetary drive structure for a small-ratio planetary reduction gear according to claim 7,
the shaft part is provided with a spline structure.
9. The planetary drive structure for a small-ratio planetary reduction gear according to any one of claims 1 to 8,
the planetary transmission structure for the small-speed-ratio planetary reducer further comprises: a planet wheel; the planet gears are rotatably mounted to the compound planet carrier; the planet wheel is meshed with the sun wheel.
10. The planetary drive structure for a small-ratio planetary reduction gear according to claim 9,
the number of the planet wheels is equal to the number of the wedges; in the circumferential direction of the central axis, the planet wheels and the wedge blocks are arranged at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921156776.7U CN210859703U (en) | 2019-07-23 | 2019-07-23 | Planetary transmission structure for small-speed-ratio planetary reducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921156776.7U CN210859703U (en) | 2019-07-23 | 2019-07-23 | Planetary transmission structure for small-speed-ratio planetary reducer |
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| CN210859703U true CN210859703U (en) | 2020-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439972A (en) * | 2019-07-23 | 2019-11-12 | 南京高精齿轮集团有限公司 | Small speed ratio planetary reducer planetary transmission structure |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439972A (en) * | 2019-07-23 | 2019-11-12 | 南京高精齿轮集团有限公司 | Small speed ratio planetary reducer planetary transmission structure |
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