CN214534419U - Annular gear floating structure and planetary gear box - Google Patents
Annular gear floating structure and planetary gear box Download PDFInfo
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- CN214534419U CN214534419U CN202120145949.6U CN202120145949U CN214534419U CN 214534419 U CN214534419 U CN 214534419U CN 202120145949 U CN202120145949 U CN 202120145949U CN 214534419 U CN214534419 U CN 214534419U
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- gear
- ring
- spline
- output shaft
- floating structure
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Abstract
The utility model discloses an inner gear ring floating structure and a planetary gear box, wherein the inner gear ring floating structure comprises an inner gear ring and an output shaft, one end of the inner gear ring is arranged as an inner gear, the other end is arranged as an internal spline, and the inner gear is meshed with a planetary gear; the middle part of the output shaft is provided with an external spline, the diameter of the external spline part of the output shaft is larger than the diameters of the two ends of the output shaft, a rotating shaft at one end of the output shaft is fixed on the shell, the external spline is connected with the internal spline, and the external spline is in clearance fit with the internal spline. The utility model discloses technical scheme is through adopting external splines and internal spline clearance fit, when the ring gear drives the output shaft and rotates, through external splines and internal spline clearance fit, can realize improving the radial unsteady effect of ring gear, improves planetary gear case's the equal load carrying ability with the ring gear as floating parts.
Description
Technical Field
The utility model relates to a derailleur manufacturing technology field, in particular to ring gear floating structure and planetary gear case.
Background
The planetary gear box is a transmission mode which is widely applied in mechanical transmission, consists of elements such as a sun gear, a planet wheel, an inner gear ring, a planet carrier and the like, and has the advantages of compact structure, large speed ratio range, small volume and mass and the like.
At present, an inner gear ring is used as an indispensable part in a torque transmission process in a planetary gearbox, and the connection mode of the inner gear ring and an output shaft is generally bolt connection and pin connection. The annulus gear is typically in mesh with a plurality of planet gears (typically 3 to 5), and the power torque transmitted between each planet gear may vary, thereby causing uneven loading of the planetary gearbox, affecting the performance of the overall gearbox.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an inner gear ring floating structure aims at reducing the problem that the planetary gear box carried unevenly, improves the unsteady effect of inner gear ring.
In order to achieve the above object, the utility model provides an inner gear ring floating structure, inner gear ring floating structure includes:
one end of the inner gear ring is provided with an inner gear, the other end of the inner gear ring is provided with an inner spline, and the inner gear is meshed with the planet gear;
the middle part of the output shaft is provided with an external spline, the diameter of the external spline part of the output shaft is larger than the diameters of the two ends of the output shaft, a rotating shaft at one end of the output shaft is fixed on the shell, the external spline is connected with the internal spline, and the external spline is in clearance fit with the internal spline.
Optionally, the inner gear ring and the inner spline are provided with inner grooves on both sides respectively, and the inner grooves are provided with retainer rings.
Optionally, the distance between the two retaining rings is greater than the thickness of the external spline.
Optionally, the diameter of the inner gear tooth root circle is smaller than that of the inner wall of the inner gear ring, and the diameter of the inner wall of the inner gear ring is smaller than that of the inner spline tooth tip circle, wherein the inner wall of the inner gear ring is located between the inner spline and the inner gear.
Optionally, the diameter of the inner gear ring weight-reducing inner wall is larger than the diameter of the inner spline dedendum circle, wherein the inner gear ring weight-reducing inner wall is located between the inner spline and the inner gear ring wall.
Optionally, the thickness of the weight-reduced inner wall of the inner gear ring is less than 10 mm.
Optionally, at least one lightening hole is formed in the inner wall of the inner gear ring, wherein the lightening hole is located between the inner gear and the inner spline.
Optionally, one end of the output shaft is fixed to the housing through a bearing rotating shaft.
The utility model also provides a planetary gear box, planetary gear box includes ring gear floating structure, at least one planet wheel, a sun gear and planet carrier, internal gear and at least one the planet wheel meshing, at least one the planet wheel with the sun gear meshing, the planet wheel pivot is fixed in on the planet carrier, planet wheel, sun gear and the axis of ring gear is parallel to each other.
The utility model discloses technical scheme is through adopting external splines and internal spline clearance fit, when the ring gear drives the output shaft and rotates, through external splines and internal spline clearance fit, can realize improving the radial unsteady effect of ring gear, improves planetary gear case's the equal load carrying ability with the ring gear as floating parts. Through being greater than the thickness of external splines with the distance between the retaining ring, can realize that the output shaft is at axial float between the retaining ring that the inner ring gear set up, also is that the inner ring gear floats for the output shaft axial.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the floating structure of the ring gear of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the floating structure of the ring gear of the present invention;
fig. 3 is a partially enlarged view of a portion a in fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Floating structure of |
10 | |
| 11 | |
12 | |
| 20 | |
13 | |
| 30 | |
14 | Inner wall of |
| 15 | Inner gear ring weight-reducing |
16 | |
| 40 | Bearing assembly |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an inner gear ring floating structure.
In the embodiment of the present invention, as shown in fig. 1 and 2, the ring gear floating structure includes a ring gear and an output shaft. One end of the inner gear ring is provided with an inner gear, the other end of the inner gear ring is provided with an inner spline, and the inner gear is meshed with the planet gear. The planet wheel is fixed on the planet carrier, can be directly meshed with the sun wheel, and can also be meshed with the sun wheel through other planet wheels. The middle part of the output shaft is provided with an external spline, the diameter of the external spline part of the output shaft is larger than the diameters of the two ends of the output shaft, a rotating shaft at one end of the output shaft is fixed on the shell, the external spline is connected with the internal spline, and the external spline is in clearance fit with the internal spline. One end of the output shaft can be fixed to the shell through a bearing rotating shaft.
When the sun wheel drives the planet wheel to rotate, the planet wheel drives the inner gear ring to rotate through the inner gear, and the inner gear ring drives the outer spline to rotate through the inner spline and the outer spline arranged on the output shaft. Wherein, the ring gear is a through hole which is axially communicated. Through clearance fit of the external splines and the internal splines, when the inner gear ring drives the output shaft to rotate, the outer splines and the internal splines are in clearance fit, the inner gear ring can be used as a floating component, the radial floating effect of the inner gear ring is improved, and the load balancing performance of the planetary gear box is improved.
In order to facilitate fixing of the output shaft, inner grooves are formed in the inner gear ring and located on two sides of the inner spline respectively, and check rings are arranged in the inner grooves. Thus, the external spline portion of the output shaft can be fixed between the two retainer rings by matching the external spline portion of the output shaft with the retainer rings through the internal groove.
In order to improve the axial floating effect of the inner gear ring, the distance between the retainer rings arranged in the two inner grooves is set to be larger than the thickness of the outer spline. Therefore, the distance between the retainer rings is larger than the thickness of the external spline, so that the axial floating of the output shaft between the retainer rings arranged on the internal gear ring can be realized, and the internal gear ring can axially float relative to the output shaft.
The utility model discloses technical scheme is through adopting external splines and internal spline clearance fit and two distance between the retaining ring is greater than the thickness of external splines can realize with the ascending unsteady of ring gear radial direction and axial direction, improves the unsteady effect of ring gear, improves planetary gear case's the equal load capacity.
In order to facilitate the processing of the inner gear ring, the diameter of the tooth root circle of the inner gear ring can be smaller than that of the inner wall of the inner gear ring, and the diameter of the inner wall of the inner gear ring is smaller than that of the addendum circle of the internal spline. Therefore, the diameter of a tooth root circle of the inner gear through the inner gear ring is smaller than that of an inner wall of the inner gear ring, the diameter of the inner wall of the inner gear ring is smaller than that of an addendum circle of the inner spline, and the inner wall of the inner gear ring is located between the inner spline and the inner gear. The inner gear ring is processed in a stepped manner, so that the processing of the inner gear ring is facilitated, the processing efficiency of the inner gear ring is improved, and the processing precision of the inner gear ring is improved.
In order to reduce the weight of the inner gear ring, improve the flexibility between the inner gear and the inner spline, improve the deformation amount between the inner gear and the inner spline and further improve the floating effect of the inner gear ring, the diameter of the weight-reduced inner wall of the inner gear ring can be set to be larger than the diameter of the root circle of the inner spline, wherein the weight-reduced inner wall of the inner gear ring is positioned between the inner spline and the inner wall of the inner gear ring. Wherein, the thickness of the inner weight-reducing wall of the inner gear ring can be determined according to the transmitted torque. For example, when the torque transmitted by the inner gear ring is 2 kilo-watt, the thickness of the weight-reducing inner wall of the inner gear ring can be set to be 6 mm. Wherein the thickness of the weight-reduced inner wall of the inner gear ring can be set to be less than 10 mm. Therefore, the diameter of the weight-reduced inner wall of the inner gear ring is set to be larger than that of the inner spline tooth root circle, so that the thickness of the inner wall of the inner gear ring can be reduced, the self weight of the inner gear ring is reduced, and the floating effect of the inner gear ring under the action of torque is improved. The deformation of the inner gear ring can be improved when torque acts on the inner gear ring, and the floating effect of the inner gear ring is further improved.
In order to further reduce the weight of the inner gear ring and improve the floating effect of the inner gear ring, at least one lightening hole can be formed in the inner wall of the inner gear ring, wherein the lightening hole is located between the inner gear and the inner spline.
The utility model also provides a planetary gear box, this planetary gear box include at least one planet wheel, a sun gear, planet carrier and ring gear floating structure, and this ring gear floating structure's concrete structure refers to above-mentioned embodiment, because this planetary gear box has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and it is here no longer repeated one by one. The inner gear is meshed with at least one planetary gear, at least one planetary gear is meshed with the sun gear, a planetary gear rotating shaft is fixed on the planetary carrier, and the axes of the planetary gear, the sun gear and the inner gear ring are parallel to each other.
The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.
Claims (9)
1. An inner gear ring floating structure, comprising:
one end of the inner gear ring is provided with an inner gear, the other end of the inner gear ring is provided with an inner spline, and the inner gear is meshed with the planet gear;
the middle part of the output shaft is provided with an external spline, the diameter of the external spline part of the output shaft is larger than the diameter of the two ends of the output shaft, a rotating shaft at one end of the output shaft is fixed on the shell, the external spline is connected with the internal spline, and the external spline is in clearance fit with the internal spline.
2. The floating structure of the ring gear of claim 1, wherein the ring gear is provided with inner grooves on both sides of the inner spline, and the inner grooves are provided with retaining rings.
3. The floating structure of the ring gear according to claim 2, wherein the distance between the two retainer rings is greater than the thickness of the external spline.
4. The floating structure of the ring gear of claim 3, wherein the diameter of the ring gear dedendum circle is smaller than the diameter of the ring gear inner wall, which is smaller than the diameter of the internal spline addendum circle, wherein the ring gear inner wall is located between the internal spline and the ring gear.
5. The floating structure of the ring gear of claim 4, wherein the ring gear weight-reduction inner wall has a diameter larger than a diameter of the inner spline dedendum circle, wherein the ring gear weight-reduction inner wall is located between the inner spline and the ring gear inner wall.
6. The floating structure of the ring gear according to claim 5, wherein the thickness of the weight-reduced inner wall of the ring gear is less than 10 mm.
7. The floating structure of the inner gear ring as claimed in claim 5, wherein the inner gear ring is provided with at least one lightening hole on an inner wall thereof, wherein the lightening hole is located between the inner gear and the internal spline.
8. The floating structure of the ring gear of claim 1, wherein one end of the output shaft is fixed to the housing through a bearing rotating shaft.
9. An epicyclic gearbox, wherein said epicyclic gearbox comprises an annulus gear floating structure according to any of claims 1 to 7; the planetary gearbox further comprises at least one planetary wheel, a sun wheel and a planet carrier, the inner gear is meshed with at least one planetary wheel, at least one planetary wheel is meshed with the sun wheel, a planetary wheel rotating shaft is fixed on the planet carrier, and the axes of the planetary wheel, the sun wheel and the inner gear ring are parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120145949.6U CN214534419U (en) | 2021-01-19 | 2021-01-19 | Annular gear floating structure and planetary gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120145949.6U CN214534419U (en) | 2021-01-19 | 2021-01-19 | Annular gear floating structure and planetary gear box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214534419U true CN214534419U (en) | 2021-10-29 |
Family
ID=78345896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120145949.6U Active CN214534419U (en) | 2021-01-19 | 2021-01-19 | Annular gear floating structure and planetary gear box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214534419U (en) |
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2021
- 2021-01-19 CN CN202120145949.6U patent/CN214534419U/en active Active
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