CN111963630A - Integrated into one piece's gear structure - Google Patents
Integrated into one piece's gear structure Download PDFInfo
- Publication number
- CN111963630A CN111963630A CN202010866318.3A CN202010866318A CN111963630A CN 111963630 A CN111963630 A CN 111963630A CN 202010866318 A CN202010866318 A CN 202010866318A CN 111963630 A CN111963630 A CN 111963630A
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- Prior art keywords
- gear
- positioning
- external
- external gear
- boss
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Classifications
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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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
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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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses an integrally formed gear structure, and belongs to the technical field of gear machining. The gear structure is manufactured by additive manufacturing and integrated molding and comprises an internal gear, a second external gear and at least one first external gear, wherein the second external gear is positioned in the right center of the internal gear, the first external gears are positioned between the internal gear and the second external gear, and each first external gear is respectively meshed with the internal gear and the second external gear; and positioning structures are arranged between the inner gear and the first outer gear and between the first outer gear and the second outer gear. A plurality of gears and location structure do not need auxiliary structure just can reach the equipment effect by the integrative shaping of printing of vibration material disk, make convenient and fast, and production efficiency is high.
Description
Technical Field
The invention relates to the technical field of gear machining, in particular to an integrally formed gear structure.
Background
Additive manufacturing is commonly known as 3D printing, combines computer aided design, material processing and forming technology, and is a manufacturing technology for manufacturing solid objects by stacking special metal materials, non-metal materials and medical biomaterials layer by layer in modes of extrusion, sintering, melting, photocuring, spraying and the like through a software and numerical control system on the basis of a digital model file. Compared with the traditional processing mode of removing, cutting and assembling raw materials, the method is a manufacturing method through material accumulation from bottom to top, and is from top to bottom.
Simple planetary gear mechanisms are the basis of speed change mechanisms, and the speed change mechanisms of the conventional automatic transmissions are composed of two or more rows of planetary gear mechanisms. Simple planetary gear mechanisms comprise a sun gear, a plurality of planet gears and a gear ring, wherein the planet gears are supported by a fixed shaft of a planet carrier, allowing the planet gears to rotate on a supporting shaft, and the planet gears and the adjacent sun gear and the adjacent gear ring are always in constant mesh.
However, each gear of the conventional planetary gear needs to be processed separately, and the matching dimension and the processing error need to be considered during processing, so that the defects can occur and even become waste products. When the assembly is carried out after the manufacture is finished, the auxiliary baffle plate is needed for positioning, and the problem of difficult assembly is easy to occur, so that the production efficiency is low, and the defective rate is high.
Disclosure of Invention
The invention aims to provide an integrally formed gear structure, which can achieve the assembly effect without an auxiliary structure, is convenient and quick to integrally form and manufacture and has high production efficiency.
In order to realize the purpose, the following technical scheme is provided:
an integrally formed gear structure made by additive manufacturing, comprising an internal gear, a second external gear and at least one first external gear, the second external gear being located at the centre of the internal gear, the first external gears being located between the internal gear and the second external gear, each of the first external gears meshing with the internal gear and the second external gear respectively; and positioning structures are arranged between the inner gear and the first outer gear and between the first outer gear and the second outer gear.
Optionally, the positioning structure includes a positioning groove and a positioning boss which are matched with each other, the positioning boss can roll in the positioning groove, and when the positioning boss is arranged on the outer side of the first external gear, the positioning groove is arranged on both the inner side of the internal gear and the outer side of the second external gear; when the outer side of the first outer gear is provided with the positioning groove, the positioning bosses are arranged on the inner side of the inner gear and the outer side of the second outer gear.
Optionally, the positioning boss or the positioning groove is located in a middle portion of the first outer gear.
Optionally, the width of the notch of the positioning groove is larger than the width of the groove bottom.
Optionally, the groove bottom of the positioning groove and the top of the positioning boss are both arc-shaped structures.
Optionally, the fit clearance range of the positioning boss and the positioning groove is 0.1mm-0.4 mm.
Optionally, the positioning groove includes a first groove, and each tooth of the inner gear and/or the first outer gear and/or the second outer gear is provided with the first groove.
Optionally, the positioning boss comprises a first boss, and the first boss is arranged between two adjacent teeth of the internal gear and/or the first external gear and/or the second external gear.
Optionally, transition surfaces are arranged at the joints of the two sides of each tooth of the internal gear and/or the first external gear and/or the second external gear and the first bosses.
Optionally, the first external gear and the second external gear are both provided with lightening holes.
Compared with the prior art, the invention has the beneficial effects that:
the gear structure is manufactured by additive manufacturing and integrated molding and comprises an internal gear, a second external gear and at least one first external gear, wherein the second external gear is positioned in the right center of the internal gear, the first external gears are positioned between the internal gear and the second external gear, and each first external gear is respectively meshed with the internal gear and the second external gear; and positioning structures are arranged between the inner gear and the first outer gear and between the first outer gear and the second outer gear. A plurality of gears and location structure do not need auxiliary structure just can reach the equipment effect by the integrative shaping of printing of vibration material disk, make convenient and fast, and production efficiency is high.
Drawings
FIG. 1 is a perspective view of a gear structure in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a gear structure in an embodiment of the invention;
FIG. 3 is a schematic structural diagram of an internal gear in an embodiment of the present invention;
FIG. 4 is a sectional view of an internal gear in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a first external gear in an embodiment of the present invention;
fig. 6 is a schematic structural view of the second external gear in the embodiment of the present invention.
Reference numerals:
1. an internal gear; 2. a first external gear; 21. a first weight-reducing through hole; 22. a first shaft hole; 3. a second external gear; 31. a second weight-reducing through hole; 32. a second shaft hole; 4. a positioning structure; 41. a first groove; 42. a first boss; 43. a transition surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1-2, the present embodiment is directed to providing an integrally formed gear structure, which is integrally formed by additive manufacturing, and includes an internal gear 1, a second external gear 3, and at least one first external gear 2, wherein the second external gear 3 is located at the center of the internal gear 1, the first external gears 2 are located between the internal gear 1 and the second external gear 3, and each first external gear 2 is engaged with the internal gear 1 and the second external gear 3 respectively; positioning structures 4 are arranged between the internal gear 1 and the first external gear 2 and between the first external gear 2 and the second external gear 3. A plurality of gears and location structure 4 do not need auxiliary structure just can reach the equipment effect by the integrated printing shaping of vibration material disk, make convenient and fast, and production efficiency is high.
In the present embodiment, the number of the first external gears 2 is set to four. In other embodiments, the number of the first external gears 2 may also be set to one, two, three, five, or even more, and the specific number may be set as required.
Alternatively, the positioning structure 4 comprises a positioning groove and a positioning boss which are matched with each other, and the positioning boss can roll in the positioning groove.
In the present embodiment, the outer side of the first external gear 2 is provided with a positioning boss, and the inner side of the internal gear 1 and the outer side of the second external gear 3 are both provided with a positioning groove. The positioning grooves and the positioning bosses matched with the positioning grooves are used for positioning the meshing transmission relations between the inner gear 1 and the first outer gear 2 and between the first outer gear 2 and the second outer gear 3. Further, the positioning boss is located at the middle of the first external gear 2. The distance between the positioning boss and the upper end face and the distance between the positioning boss and the lower end face of the first outer gear 2 are equal, so that the positioning is more stable, and the meshing transmission between the gears cannot be influenced.
As shown in fig. 3-4, the detent recess may optionally have a notch width greater than a groove bottom width thereof. The structure can avoid the problem of clamping stagnation during gear meshing transmission.
Optionally, the bottom of the positioning groove and the top of the positioning boss are both arc-shaped structures. The arc-shaped structure has the function of smooth transition, ensures that the meshing transmission is smoother, and avoids the phenomenon of clamping stagnation.
Further, the positioning groove includes a first groove 41, and the first groove 41 is opened on each tooth of the internal gear 1 and the second external gear 3. The detent recesses on the internal gear 1 include first recesses 41 of all the teeth of the internal gear 1, and the detent recesses on the second external gear 3 include first recesses 41 of all the teeth of the second external gear 3.
As shown in fig. 5, further, the positioning boss includes a first boss 42, the first boss 42 is disposed between two adjacent teeth of the first external gear 2, and a transition surface 43 is disposed at a connection between each of two sides of each of the teeth of the first external gear 2 and the first boss 42. The transition surface 43 serves as a transition connection, and ensures that the first boss 42 can rotate along with the first external gear 2 and smoothly roll in the positioning groove.
Optionally, the fit clearance range of the positioning boss and the positioning groove is 0.1mm-0.4 mm. Preferably, the fit clearance of the positioning boss and the positioning groove is 0.2mm, and the clearance of the size can meet the requirements of positioning and is smoother in transmission.
Optionally, the first external gear 2 is provided with a plurality of first weight-reducing through holes 21. The first lightening through holes 21 can meet the modeling requirement on the one hand and can lighten the self weight of the first external gear 2 on the other hand.
Optionally, a first shaft hole 22 is opened at the center of the first external gear 2. The first shaft hole 22 is capable of passing through the first transmission shaft and is connected to the driving member or the driven member.
As shown in fig. 6, optionally, a plurality of second weight-reducing through holes 31 are formed in the second external gear 3. The second lightening through holes 31 can meet the modeling requirement on the one hand and can lighten the self weight of the second external gear 3 on the other hand.
Optionally, a second shaft hole 32 is opened at the center of the second external gear 3. The second shaft hole 32 can be inserted with a second transmission shaft and connected with a driving member or a driven member.
In other embodiments, the outer side of the first external gear 2 is provided with a positioning groove, and the inner side of the internal gear 1 and the outer side of the second external gear 3 are both provided with a positioning boss. The positioning grooves and the positioning bosses matched with the positioning grooves are used for positioning the meshing transmission relations between the inner gear 1 and the first outer gear 2 and between the first outer gear 2 and the second outer gear 3. Further, the positioning groove is located at the middle of the first external gear 2. The distance between the upper end face and the lower end face of the positioning groove and the first external gear 2 is equal, so that the positioning is more stable, and the meshing transmission between the gears cannot be influenced.
Further, the positioning groove includes a first groove 41, and a first groove 41 is opened on each tooth of the first outer gear 2. The positioning recesses on the first external gear 2 include first recesses 41 of all the teeth of the first external gear 2.
Further, the positioning boss comprises a first boss 42, the first boss 42 is arranged between two adjacent teeth of the internal gear 1 and between two adjacent teeth of the second external gear 3, and a transition surface 43 is arranged at the joint of the first boss 42 and each of two sides of each of the teeth of the internal gear 1 and the second external gear 3. The transition surface 43 is arranged to perform a transition connection function, so that the first boss 42 can rotate along with the inner gear 1 or the second outer gear 3 and smoothly roll in the positioning groove.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An integrally formed gear structure, characterized in that the gear structure is manufactured by additive manufacturing and integrally formed, and comprises an internal gear (1), a second external gear (3) and at least one first external gear (2), wherein the second external gear (3) is positioned at the center of the internal gear (1), the first external gears (2) are positioned between the internal gear (1) and the second external gear (3), and each first external gear (2) is respectively meshed with the internal gear (1) and the second external gear (3); and positioning structures (4) are arranged between the inner gear (1) and the first outer gear (2) and between the first outer gear (2) and the second outer gear (3).
2. The gear structure according to claim 1, characterized in that the positioning structure (4) comprises a positioning groove and a positioning boss which are matched with each other, the positioning boss can roll in the positioning groove, when the positioning boss is arranged on the outer side of the first external gear (2), the positioning groove is arranged on the inner side of the internal gear (1) and the outer side of the second external gear (3); when the positioning groove is formed in the outer side of the first outer gear (2), the positioning bosses are formed in the inner side of the inner gear (1) and the outer side of the second outer gear (3).
3. The gear structure according to claim 2, characterized in that said positioning boss or said positioning recess is located in the middle of said first external gear (2).
4. The gear structure according to claim 2, wherein the notch width of the positioning groove is larger than the groove bottom width thereof.
5. The gear structure of claim 2 wherein the groove bottom of the locating groove and the top of the locating boss are both arc-shaped structures.
6. The gear structure according to claim 2, wherein the fitting clearance of the positioning boss and the positioning groove ranges from 0.1mm to 0.4 mm.
7. The gear structure according to claim 2, characterized in that the positioning recesses comprise first recesses (41), the first recesses (41) being opened in each tooth of the inner gear (1) and/or the first outer gear (2) and/or the second outer gear (3).
8. The gear structure according to claim 2, characterized in that the positioning boss comprises a first boss (42), and the first boss (42) is provided between two adjacent teeth of the internal gear (1) and/or the first external gear (2) and/or the second external gear (3).
9. The gear structure according to claim 8, characterized in that the junction of both sides of each tooth of the internal gear (1) and/or the first external gear (2) and/or the second external gear (3) with the first boss (42) is provided with a transition surface (43).
10. The gear structure according to any one of claims 1 to 9, characterized in that weight reduction holes are provided in both the first external gear (2) and the second external gear (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010866318.3A CN111963630A (en) | 2020-08-25 | 2020-08-25 | Integrated into one piece's gear structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010866318.3A CN111963630A (en) | 2020-08-25 | 2020-08-25 | Integrated into one piece's gear structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111963630A true CN111963630A (en) | 2020-11-20 |
Family
ID=73390389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010866318.3A Pending CN111963630A (en) | 2020-08-25 | 2020-08-25 | Integrated into one piece's gear structure |
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|---|---|
| CN (1) | CN111963630A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2078332A (en) * | 1980-06-12 | 1982-01-06 | Voith Getriebe Kg | A spur gear transmission system |
| CN2837196Y (en) * | 2005-07-25 | 2006-11-15 | 曹俊忠 | Central and rear axle speed increaser for bicycle |
| US20130102435A1 (en) * | 2010-01-19 | 2013-04-25 | Skf Aerospace France | Reduction gear and transmission mechanism including such a reduction gear for controlling an aircraft |
| US20180038448A1 (en) * | 2015-03-30 | 2018-02-08 | Kawasaki Jukogyo Kabushiki Kaisha | Planetary gear device |
| US20190085941A1 (en) * | 2017-09-16 | 2019-03-21 | Genesis Advanced Technology Inc. | Differential planetary gearbox |
| CN208997273U (en) * | 2018-09-30 | 2019-06-18 | 东莞市摩尔斯自动化科技有限公司 | A kind of multi-stage speed reducer of vertical output |
-
2020
- 2020-08-25 CN CN202010866318.3A patent/CN111963630A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2078332A (en) * | 1980-06-12 | 1982-01-06 | Voith Getriebe Kg | A spur gear transmission system |
| CN2837196Y (en) * | 2005-07-25 | 2006-11-15 | 曹俊忠 | Central and rear axle speed increaser for bicycle |
| US20130102435A1 (en) * | 2010-01-19 | 2013-04-25 | Skf Aerospace France | Reduction gear and transmission mechanism including such a reduction gear for controlling an aircraft |
| US20180038448A1 (en) * | 2015-03-30 | 2018-02-08 | Kawasaki Jukogyo Kabushiki Kaisha | Planetary gear device |
| US20190085941A1 (en) * | 2017-09-16 | 2019-03-21 | Genesis Advanced Technology Inc. | Differential planetary gearbox |
| CN208997273U (en) * | 2018-09-30 | 2019-06-18 | 东莞市摩尔斯自动化科技有限公司 | A kind of multi-stage speed reducer of vertical output |
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