CN215596314U - Two-stage planetary reducer - Google Patents
Two-stage planetary reducer Download PDFInfo
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- CN215596314U CN215596314U CN202121321681.3U CN202121321681U CN215596314U CN 215596314 U CN215596314 U CN 215596314U CN 202121321681 U CN202121321681 U CN 202121321681U CN 215596314 U CN215596314 U CN 215596314U
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Abstract
The utility model belongs to the technical field of speed reducers, in particular to a double-stage planetary speed reducer, which comprises: a box body; a gear shaft; the first planet carrier is used for rotationally fixing the first planet wheels and is fixedly connected with the box body, the inner side and the outer side of each first planet wheel are respectively meshed with the first sun wheel and the first inner gear through gears, and the first sun wheel and the gear shaft are coaxial and are arranged at intervals through gaps; the second planet carrier is used for rotationally fixing the second planet wheel and is meshed with the first sun wheel through a gear; each second planet gear is meshed with the external teeth on the gear shaft through a gear and meshed with the second internal gear through the gear; the second internal gear is fixedly connected with the first internal gear, and the first internal gear extends towards the box body and is rotatably connected with the box body through a bearing. According to the utility model, the bearing is arranged, so that the whole first internal gear can obtain a stable position relation with the gear shaft in the rotating process, and the radial runout in the power output process is avoided.
Description
Technical Field
The utility model belongs to the technical field of speed reducers, and particularly relates to a double-stage planetary speed reducer.
Background
The speed reducer plays a role in matching rotating speed and transmitting torque between a prime motor and a working machine or an actuating mechanism, is relatively precise machinery, aims to reduce the rotating speed, and is widely applied to modern machinery.
In order to obtain a larger speed ratio, a multi-stage planet carrier is arranged, so that the amplification effect on torque is improved, however, due to the existence of gaps between gears, after the current multi-stage planet carrier is arranged, the final power output inevitably generates radial jumping, so that the stability of the power output is influenced.
In view of the above problems, the present inventors have actively studied and innovated a double-stage planetary reducer based on practical experience and professional knowledge that is abundant for many years in such product engineering applications.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the background art, the utility model provides a double-stage planetary reducer.
In order to achieve the purpose, the utility model provides the following technical scheme: a dual-stage planetary reducer comprising:
a box body;
a gear shaft coaxially connected with the prime mover;
the first planet carrier is used for rotationally fixing the first planet gears and is fixedly connected with the box body, the inner side and the outer side of each first planet gear are respectively meshed with a first sun gear and a first inner gear through gears, and the first sun gear and the gear shaft are coaxial and are arranged at intervals through gaps;
the second planet carrier is used for rotationally fixing the second planet wheel and is meshed with the first sun wheel through a gear; each second planet gear is meshed with the external teeth on the gear shaft through a gear and meshed with a second internal gear through a gear;
the second internal gear is fixedly connected with the first internal gear, and the first internal gear extends towards the box body and is rotatably connected with the box body through a bearing.
Further, the first internal gear and the second internal gear are fixed by a connecting member parallel to the axis of the gear shaft.
Furthermore, the inner side of the second internal gear extends towards the first internal gear to form a first convex edge, the first convex edge is attached to the inner wall of the first internal gear, and a sealing structure is arranged between the first internal gear and the first convex edge.
Furthermore, an annular groove is formed in the binding surface of the first convex edge and the first inner gear and used for installing the O-shaped sealing ring.
Furthermore, a clamping groove is formed in the periphery of the first sun gear, a clamping spring is installed, the clamping spring is used for axially positioning one end of the second planet carrier, and the other end of the second planet carrier is positioned through a step surface located on the periphery of the first sun gear.
Furthermore, a clamping groove is formed in the upper periphery of the first planet carrier, a clamping spring is installed and used for axially positioning the first planet wheel, and the other end of the first planet wheel is positioned through a step surface on the periphery of the first planet carrier.
Furthermore, a clamping groove is formed in the periphery of the second planet carrier, the clamping spring is installed and used for axially positioning the second planet gear, and the other end of the second planet gear is positioned through a step surface located on the periphery of the second planet carrier.
Further, the box body and the first planet carrier are fixed through a connecting piece parallel to the gear shaft.
Furthermore, the face of the box body facing the first internal gear is provided with a groove, the first internal gear is provided with a second convex edge, the second convex edge is inserted into the groove and is arranged at intervals with the inner wall of the groove, and the interval distance is within a set range.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the double-stage planetary reducer formed by the two-stage planet carrier can realize transmission of a larger speed ratio than a single stage, a gap for installing the bearing is formed between the first internal gear and the box body by extending the first internal gear to the box body, and the bearing can be installed to ensure that the whole first internal gear obtains a stable position relation with the gear shaft in the rotating process, so that radial jumping in the power output process is avoided, after the stability of the first internal gear is improved, the first internal gear is reversely transmitted to each gear inside, the working stability of each gear can be effectively increased, meanwhile, the machining precision requirement of each gear can be reduced, the product cost is effectively reduced, and the service life is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a sectional view of a double-stage planetary reducer;
FIG. 2 is a schematic view of the first carrier, first planet gear, first sun gear, and first ring gear mounted;
FIG. 3 is a schematic view of the second planet carrier, the second planet gear, the second sun gear and the second inner gear;
FIG. 4 is an enlarged view of a portion of FIG. 1 at A;
FIG. 5 is an enlarged view of a portion of FIG. 1 at B;
FIG. 6 is an enlarged view of a portion of FIG. 1 at C;
in the figure: 1. a box body; 11. a groove; 2. a gear shaft; 3. a first carrier; 4. a first planet gear; 5. a first sun gear; 6. a first internal gear; 61. a second convex edge; 7. a second planet carrier; 8. a second planet wheel; 9. a second internal gear; 91. a first convex edge; 92. a ring groove; 10. and a bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 6, a double-stage planetary reducer includes: a box body 1; a gear shaft 2 coaxially connected to the prime mover; the first planet carrier 3 is used for rotationally fixing the first planet gears 4 and fixedly connecting the first planet gears with the box body 1, the inner side and the outer side of each first planet gear 4 are respectively meshed with the first sun gear 5 and the first internal gear 6 through gears, and the first sun gear 5 is coaxial with the gear shaft 2 and is arranged at intervals through gaps; a second planet carrier 7 which rotationally fixes the second planet wheel 8 and is engaged with the first sun wheel 5 through a gear; each second planet wheel 8 is geared with external teeth on the gear shaft 2 and geared with a second internal gear 9; the second internal gear 9 is fixedly connected with the first internal gear 6, and the first internal gear 6 extends towards the box body 1 and is rotatably connected with the box body 1 through a bearing 10.
As shown in fig. 1 to 3, in the present invention, a double-stage planetary reducer formed by two stages of planetary carriers can realize a larger speed ratio transmission than that of a single stage. The power output of the gear shaft 2 is transmitted to the first planet carrier 3 through the first sun gear 5 after being decelerated by the second planet carrier 7, and the first planet carrier 3 is fixedly arranged, so that the power output can be stably output outwards after being decelerated by the first internal gear 6 finally, and the first internal gear 6 and the second internal gear 9 can keep stable synchronous rotation by reasonably controlling the gear ratio of meshing at each position. In the use process, the two can be connected with structures such as wheels and the like, so that the wheels are driven to rotate to supply power to the vehicle.
In the utility model, through the extension of the first internal gear 6 to the box body 1, a gap for installing the bearing 10 is obtained between the first internal gear 6 and the box body 1, and the installation of the bearing 10 can ensure that the whole first internal gear 6 obtains a stable position relation with the gear shaft 2 in the rotating process, so that the radial runout in the power output process is avoided, after the stability of the first internal gear is improved, the first internal gear is reversely transmitted to each gear inside, the working stability of each gear can be effectively increased, meanwhile, the machining precision requirement of each gear can be reduced, the product cost is effectively reduced, and the service life is prolonged.
As a preference of the above embodiment, the first internal gear 6 and the second internal gear 9 are fixed by a connecting member parallel to the axis of the gear shaft 2, so that the integrity of the first internal gear 6 and the second internal gear 9 in the radial direction can be improved, and the stability of power output can be effectively improved.
In order to further improve the integrity, as shown in fig. 4, the inner side of the second internal gear 9 extends to the first internal gear 6 to form a first convex edge 91, the first convex edge 91 is attached to the inner wall of the first internal gear 6, and a sealing structure is arranged between the first internal gear 6 and the first convex edge 91. Through the setting of first protruding edge 91, can make and further promote the wholeness of the two after with the coaxial laminating of first internal gear 6, guarantee the stability of the two on radial direction, also provide the position for seal structure's installation simultaneously.
As an embodiment of the sealing structure, an annular groove 92 is provided on a bonding surface of the first convex edge 91 and the first inner gear 6, and is used for mounting the O-shaped sealing ring, and the annular groove 92 is provided on the first convex edge 91, so that the processing difficulty can be reduced, and the mounting of the O-shaped sealing ring can be more convenient.
In order to facilitate the guarantee of the position stability of the second planet carrier 7 relative to the first sun gear 5, as shown in fig. 5, a clamping groove is formed in the periphery of the first sun gear 5 and used for installing a clamping spring, the clamping spring is used for axially positioning one end of the second planet carrier 7, and the other end of the second planet carrier 7 is positioned through a step surface located on the periphery of the first sun gear 5. The installation and positioning difficulty of the second planet carrier 7 can be reduced through the arrangement of the clamp spring, and the second planet carrier 7 can be quickly installed and positioned through the limitation of the step surface and the clamp spring.
Also for the purpose of installation, a clamping groove is formed in the upper periphery of the first planet carrier 3, a clamping spring is installed, the clamping spring is used for axially positioning the first planet wheel 4, and the other end of the first planet wheel 4 is positioned through a step surface located in the periphery of the first planet carrier 3. Similarly, a clamping groove is formed in the upper periphery of the second planet carrier 7, a clamping spring is installed and used for axially positioning the second planet wheel 8, and the other end of the second planet wheel 8 is positioned through a step surface located on the periphery of the second planet carrier 7; of course, the first planet wheel 4 and the second planet wheel 8 are of self-bearing structures in the embodiment, and the positioning of the first planet wheel and the second planet wheel is actually realized through the positioning of the bearings.
As a preference of the above embodiment, the case 1 and the first carrier 3 are fixed by a coupling member parallel to the gear shaft 2. The integrity of the first planet carrier 3 and the box body 1 can be improved in the radial direction in the same way, and the stability of power output is improved. Wherein the connecting member can be sunk into the first carrier 3, thereby improving the compactness of the inner structure.
As a preferable example of the above embodiment, as shown in fig. 6, a concave groove 11 is provided on a surface of the case 1 facing the first internal gear 6, a second convex edge 61 is provided on the first internal gear 6, and the second convex edge 61 is inserted into the concave groove 11 and spaced from an inner wall of the concave groove 11, wherein the spaced distance is within a set range. The groove 11 and the bearing 10 and the like arranged on the inner side of the first internal gear 6 are relatively protected in a sealing manner by the second convex edge 61 inserted into the groove 11, and the groove is spaced from the bearing by a certain distance, so that the sealing reliability can be ensured.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the utility model as defined by the appended claims. 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. A two-stage planetary reduction gear, comprising:
a box body;
a gear shaft coaxially connected with the prime mover;
the first planet carrier is used for rotationally fixing the first planet gears and is fixedly connected with the box body, the inner side and the outer side of each first planet gear are respectively meshed with a first sun gear and a first inner gear through gears, and the first sun gear and the gear shaft are coaxial and are arranged at intervals through gaps;
the second planet carrier is used for rotationally fixing the second planet wheel and is meshed with the first sun wheel through a gear; each second planet gear is meshed with the external teeth on the gear shaft through a gear and meshed with a second internal gear through a gear;
the second internal gear is fixedly connected with the first internal gear, and the first internal gear extends towards the box body and is rotatably connected with the box body through a bearing.
2. The two-stage planetary reducer according to claim 1, wherein the first internal gear and the second internal gear are fixed by a connecting member that is parallel to the gear shaft axis.
3. The two-stage planetary reducer according to claim 1 or 2, wherein the inner side of the second internal gear extends toward the first internal gear to form a first convex edge, the first convex edge is attached to the inner wall of the first internal gear, and a sealing structure is arranged between the first internal gear and the first convex edge.
4. The two-stage planetary reducer according to claim 3, wherein an annular groove is provided on a surface of the first flange that abuts against the first internal gear, and is configured to receive an O-ring seal.
5. The two-stage planetary reducer according to claim 1, wherein a snap groove is formed in the periphery of the first sun gear, and a snap spring is installed, the snap spring is used for axially positioning one end of the second planet carrier, and the other end of the second planet carrier is positioned by a step surface located in the periphery of the first sun gear.
6. The dual-stage planetary reducer according to claim 1, wherein a snap ring is disposed on an upper periphery of the first carrier, and is used for mounting a snap spring, the snap ring is used for axially positioning the first planetary gear, and the other end of the first planetary gear is positioned by a step surface located on a periphery of the first carrier.
7. The two-stage planetary reducer according to claim 1, wherein a snap ring is disposed on an upper periphery of the second planet carrier, and a snap spring is mounted on the snap ring, the snap ring is used for axially positioning the second planet gear, and the other end of the second planet gear is positioned by a step surface located on a periphery of the second planet carrier.
8. The dual stage planetary reducer of claim 1, wherein the case and the first carrier are fixed by a connection parallel to the gear shaft.
9. The two-stage planetary reducer according to claim 1, wherein a groove is formed in a surface of the casing facing the first internal gear, a second convex edge is formed on the first internal gear, the second convex edge is inserted into the groove and is spaced from an inner wall of the groove, and the spaced distance is within a set range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121321681.3U CN215596314U (en) | 2021-06-11 | 2021-06-11 | Two-stage planetary reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121321681.3U CN215596314U (en) | 2021-06-11 | 2021-06-11 | Two-stage planetary reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215596314U true CN215596314U (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121321681.3U Active CN215596314U (en) | 2021-06-11 | 2021-06-11 | Two-stage planetary reducer |
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| Country | Link |
|---|---|
| CN (1) | CN215596314U (en) |
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2021
- 2021-06-11 CN CN202121321681.3U patent/CN215596314U/en active Active
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