CN217927034U - Compact transmission shaft structure - Google Patents
Compact transmission shaft structure Download PDFInfo
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- CN217927034U CN217927034U CN202221121106.3U CN202221121106U CN217927034U CN 217927034 U CN217927034 U CN 217927034U CN 202221121106 U CN202221121106 U CN 202221121106U CN 217927034 U CN217927034 U CN 217927034U
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- rotating shaft
- mounting hole
- transmission shaft
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Abstract
The utility model provides a compact transmission shaft structure, which comprises a rotating shaft, a first bearing, a second bearing, a first gear and a second gear, wherein the first bearing, the second bearing, the first gear and the second gear are all sleeved on the rotating shaft; the first gear and the second gear are mounted between the first bearing and the second bearing. An inner cavity is formed in one side, far away from the second bearing, of the first bearing, the inner cavity can accommodate the bearing in the axial direction, and the first bearing is installed in the inner cavity. And a shaft shoulder which extends out and is used for installing and positioning the first bearing is arranged in the inner cavity. First gear central authorities are equipped with first mounting hole, and first mounting hole inner wall is equipped with first internal spline, and the pivot head end be equipped with internal spline complex first external spline, first gear passes through spline fit to be installed at the head end of pivot, and first mounting hole sets up in the shaft shoulder below. Through optimizing the structure to shorten the axial dimension, make the whole size of derailleur compacter.
Description
Technical Field
The utility model relates to an electric drive technical field especially relates to a compact transmission axle construction.
Background
In a transmission, when a plurality of gears or bearings are provided on a shaft, they are usually assembled together by spline connection or welding or press fitting, and the bearings and gears are arranged side by side, each of which occupies a certain axial space, so that the overall size of the transmission is too large.
The utility model discloses a compact derailleur axle construction shortens the axial dimensions of derailleur for the whole size of derailleur is compacter.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a compact transmission shaft structure, which is optimized to shorten the axial dimension, so that the overall size of the transmission is more compact.
In order to achieve the above and other related objects, the present invention provides a compact transmission shaft structure, which includes a rotating shaft, a first bearing, a second bearing, a first gear and a second gear, wherein the first bearing, the second bearing, the first gear and the second gear are all sleeved on the rotating shaft; the first gear and the second gear are mounted between the first bearing and the second bearing; wherein: an inner cavity is formed in one side, far away from the second gear, of the first shaft gear, and the first bearing is installed in the inner cavity.
In the compact transmission shaft structure, the inner cavity is internally provided with a shaft shoulder which extends out and is used for installing and positioning the first bearing.
In the compact transmission shaft structure, a first mounting hole is formed in the center of the first gear, a first internal spline is formed on the inner wall of the first mounting hole, a first external spline matched with the internal spline is formed at the head end of the rotating shaft, and the first gear is mounted at the head end of the rotating shaft through spline matching; the first mounting hole is arranged below the shaft shoulder.
In the compact transmission shaft structure, the first gear is mounted at the head end of the rotating shaft by welding.
The compact transmission shaft structure is characterized in that the first gear and the rotating shaft are of an integrated structure.
The compact transmission shaft structure is characterized in that a second mounting hole is formed in the center of the second gear, a second internal spline is arranged on the inner wall of the second mounting hole, a second external spline is arranged on the outer wall of the rotating shaft, the second gear is mounted on the rotating shaft in a spline fit mode, and positioning steps are arranged on two sides of the second external spline respectively.
The compact transmission shaft structure described above, wherein the second gear is mounted on the rotating shaft by welding.
In the compact transmission shaft structure, the second gear and the rotating shaft are in an integrated structure.
As described above, the present invention provides a compact transmission shaft structure, which has the following advantageous effects:
the utility model provides a compact transmission shaft structure, which comprises a rotating shaft, a first bearing, a second bearing, a first gear and a second gear, wherein the first bearing, the second bearing, the first gear and the second gear are all sleeved on the rotating shaft; the first gear and the second gear are mounted between the first bearing and the second bearing. One side of keeping away from the second bearing on the first bearing is equipped with the inner chamber, and this inner chamber can hold the bearing in the axial, and the first bearing is installed at the inner chamber to shorten the axial dimension, make the whole size of derailleur compacter.
Drawings
Fig. 1 is a schematic view showing a compact transmission shaft structure according to embodiment 1 of the present invention;
fig. 2 is a first gear diagram showing a compact transmission shaft structure according to embodiment 1 of the present invention;
fig. 3 is a schematic view showing a compact transmission shaft structure according to embodiment 3 of the present invention;
fig. 4 is a schematic rotation shaft diagram of a compact transmission shaft structure according to embodiment 3 of the present invention;
element number description:
1. a rotating shaft; 2. a first bearing; 3. a second bearing; 4. a first gear; 5. a second gear; 6. an inner cavity; 7. a shaft shoulder; 8. A first mounting hole; 9. a second mounting hole; 10. and positioning the step.
Detailed Description
The following description is given for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be apparent to those skilled in the art from the disclosure of the present invention.
Please refer to fig. 1 to 4. It should be understood that the structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that can be achieved. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Example 1
Referring to fig. 1 and 2, a compact transmission shaft structure includes a rotating shaft 1, a first bearing 2, a second bearing 3, a first gear 4 and a second gear 5, wherein the first bearing 2, the second bearing 3, the first gear 4 and the second gear 5 are all sleeved on the rotating shaft 1, and the first gear 4 and the second gear 5 are installed between the first bearing 2 and the second bearing 3. Wherein, the spoke plate of the first gear 4 is in an asymmetric structure, one side of the first gear 4 far away from the second gear 5 is provided with an inner cavity 6, the inner cavity 6 can accommodate a bearing in the axial direction, and the first bearing 2 is arranged in the inner cavity 6, thereby reducing the axial dimension.
Furthermore, a shaft shoulder 7 which extends out and is used for installing and positioning the first bearing 2 is arranged in the inner cavity 6, and the first bearing 2 is arranged on the shaft shoulder 7.
Furthermore, first gear 4 central authorities are equipped with first mounting hole 8, and first gear 4 overlaps through 8 covers of first mounting hole and establishes on pivot 1 to through the head end of welded mounting at pivot 1.
Further, the second gear 5 and the rotating shaft 1 are of an integrated structure.
Example 2
The embodiment provides a compact derailleur axle construction, including pivot 1, first bearing 2, second bearing 3, first gear 4 and second gear 5 all overlap and establish on pivot 1, and first gear 4 and second gear 5 are installed between first bearing 2 and second bearing 3. Wherein, the spoke plate of the first gear 4 is in an asymmetric structure, one side of the first gear 4 far away from the second gear 5 is provided with an inner cavity 6, the inner cavity 6 can accommodate a bearing in the axial direction, and the first bearing 2 is arranged in the inner cavity 6, thereby reducing the axial dimension.
Furthermore, a shaft shoulder 7 extending out for installing and positioning the first bearing 2 is arranged inside the inner cavity 6, and the first bearing 2 is installed on the shaft shoulder 7.
Further, a first mounting hole 8 is formed in the center of the first gear 4, a first internal spline is arranged on the inner wall of the first mounting hole 8, a first external spline matched with the internal spline is arranged at the head end of the rotating shaft 1, and the first gear 4 is mounted at the head end of the rotating shaft 1 in a spline fit manner; the first mounting hole 8 is provided below the shoulder 7.
Further, the second gear 5 and the rotating shaft 1 are of an integrated structure.
Example 3
Referring to fig. 3 and 4, the present embodiment provides a compact transmission shaft structure, which includes a rotating shaft 1, a first bearing 2, a second bearing 3, a first gear 4 and a second gear 5, wherein the first bearing 2, the second bearing 3, the first gear 4 and the second gear 5 are all sleeved on the rotating shaft 1, and the first gear 4 and the second gear 5 are installed between the first bearing 2 and the second bearing 3. Wherein, the spoke plate of the first gear 4 is in an asymmetric structure, one side of the first gear 4 far away from the second gear 5 is provided with an inner cavity 6, the inner cavity 6 can accommodate a bearing in the axial direction, and the first bearing 2 is arranged in the inner cavity 6, thereby reducing the axial dimension.
Furthermore, a shaft shoulder 7 which extends out and is used for installing and positioning the first bearing 2 is arranged in the inner cavity 6, and the first bearing 2 is arranged on the shaft shoulder 7.
Furthermore, the first gear 4 and the rotating shaft 1 are of an integrated structure.
Further, a second mounting hole 9 is formed in the center of the second gear 5, a second internal spline is arranged on the inner wall of the second mounting hole 9, a second external spline is arranged on the outer wall of the rotating shaft 1, the second gear 5 is mounted on the rotating shaft 1 through spline fitting, positioning steps 10 are respectively arranged on two sides of the second external spline, the second gear 5 is precisely mounted on the rotating shaft 1 through the positioning steps 10, and the second bearing 3 is mounted on one side of the positioning steps 10 adjacent to the tail end.
Example 4
The embodiment provides a compact derailleur axle construction, including pivot 1, first bearing 2, second bearing 3, first gear 4 and second gear 5 all overlap and establish on pivot 1, and first gear 4 and second gear 5 are installed between first bearing 2 and second bearing 3. Wherein, the spoke plate of the first gear 4 is in an asymmetric structure, one side of the first gear 4 far away from the second gear 5 is provided with an inner cavity 6, the inner cavity 6 can accommodate a bearing in the axial direction, and the first bearing 2 is arranged in the inner cavity 6, thereby reducing the axial dimension.
Furthermore, a shaft shoulder 7 which extends out and is used for installing and positioning the first bearing 2 is arranged in the inner cavity 6, and the first bearing 2 is arranged on the shaft shoulder 7.
Further, the first gear 4 and the rotating shaft 1 are of an integrated structure.
Furthermore, a second mounting hole 9 is formed in the center of the second gear 5, and the second gear 5 is sleeved on the rotating shaft 1 through the mounting hole and fixedly mounted on the rotating shaft 1 through welding.
To sum up, the utility model provides a compact transmission shaft structure, including pivot 1, first bearing 2, second bearing 3, first gear 4 and second gear 5 all overlap on pivot 1; a first gear 4 and a second gear 5 are mounted between the first bearing 2 and the second bearing 3. The first bearing 2 is provided with an inner cavity 6 on the side far away from the second bearing 3, the inner cavity 6 can accommodate the bearing in the axial direction, and the first bearing 2 is installed in the inner cavity 6, so that the axial size is shortened, and the whole size of the transmission is more compact. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A compact transmission shaft structure comprises a rotating shaft, a first bearing, a second bearing, a first gear and a second gear, wherein the first bearing, the second bearing, the first gear and the second gear are sleeved on the rotating shaft; the first gear and the second gear are mounted between the first bearing and the second bearing; the method is characterized in that: one side that first gear kept away from the second gear is equipped with the inner chamber, first bearing is installed in the inner chamber.
2. The compact transmission shaft structure of claim 1, wherein: and a shaft shoulder which extends out and is used for installing and positioning the first bearing is arranged in the inner cavity.
3. The compact transmission shaft structure of claim 2, wherein: a first mounting hole is formed in the center of the first gear, a first internal spline is arranged on the inner wall of the first mounting hole, a first external spline matched with the internal spline is arranged at the head end of the rotating shaft, and the first gear is mounted at the head end of the rotating shaft in a spline fit mode; the first mounting hole is arranged below the shaft shoulder.
4. The compact transmission shaft structure of claim 1, wherein: the first gear is installed at the head end of the rotating shaft through welding.
5. The compact transmission shaft structure of claim 1, wherein: the first gear and the rotating shaft are of an integrated structure.
6. The compact transmission shaft structure of claim 1, wherein: the central part of the second gear is provided with a second mounting hole, the inner wall of the second mounting hole is provided with a second internal spline, the outer wall of the rotating shaft is provided with a second external spline, the second gear is mounted on the rotating shaft through spline fitting, and two sides of the second external spline are respectively provided with a positioning step.
7. The compact transmission shaft structure of claim 1, wherein: the second gear is mounted on the rotating shaft by welding.
8. The compact transmission shaft structure of claim 1, wherein: the second gear and the rotating shaft are of an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221121106.3U CN217927034U (en) | 2022-05-11 | 2022-05-11 | Compact transmission shaft structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221121106.3U CN217927034U (en) | 2022-05-11 | 2022-05-11 | Compact transmission shaft structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217927034U true CN217927034U (en) | 2022-11-29 |
Family
ID=84176496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221121106.3U Active CN217927034U (en) | 2022-05-11 | 2022-05-11 | Compact transmission shaft structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217927034U (en) |
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2022
- 2022-05-11 CN CN202221121106.3U patent/CN217927034U/en active Active
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