CN106369041B - A kind of accurate retarding machine eccentric shaft and accurate retarding machine - Google Patents
A kind of accurate retarding machine eccentric shaft and accurate retarding machine Download PDFInfo
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- CN106369041B CN106369041B CN201610854594.1A CN201610854594A CN106369041B CN 106369041 B CN106369041 B CN 106369041B CN 201610854594 A CN201610854594 A CN 201610854594A CN 106369041 B CN106369041 B CN 106369041B
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- arc surface
- shaft body
- axis
- eccentric shaft
- axle center
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- 230000000979 retarding effect Effects 0.000 title abstract 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 29
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 23
- 230000008569 process Effects 0.000 abstract description 21
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 238000000641 cold extrusion Methods 0.000 description 6
- 238000005242 forging Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000009347 mechanical transmission Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/18—Eccentric-shafts
-
- 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
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
- F16H2001/323—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear comprising eccentric crankshafts driving or driven by a gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The present invention relates to accurate retarding machine technical fields, more particularly to a kind of accurate retarding machine eccentric shaft and accurate retarding machine, the eccentric shaft includes integrally formed eccentric shaft body, eccentric shaft body includes the first axle body set gradually, the second axle body, third axis body, the 4th axis body, the 5th axis body, the longitudinal section of the first axle body is a curved surface, and the curved surface includes the first arc surface, the second arc surface, third arc surface, the 4th arc surface；First arc surface and third arc surface are concentric, and the axle center of the first arc surface, third arc surface axle center with the axle center of the second axle body on same straight line；The axle center of second arc surface and the axle center of the 4th axis body are on same straight line, and the axle center of the 4th arc surface and the axle center of third axis body are on same straight line；When eccentric shaft body is connect with transmission gear, the existing problem that technology difficulty is big, process costs are high of spline connection was both avoided, has in turn ensured the relative positional accuracy between gear and third axis body, the 4th axis body.
Description
Technical Field
The invention relates to the technical field of precision speed reducers, in particular to an eccentric shaft of a precision speed reducer and the precision speed reducer.
Background
A precision reduction gear is a power transmission mechanism that uses a gear speed converter to reduce the number of revolutions of a motor to a desired number of revolutions and obtain a large torque. A precision reducer is a relatively precise machine, and is used for the purpose of reducing the rotation speed and increasing the torque. The known speed reducer is a device which plays a role in matching rotating speed and transmitting torque between a prime mover and a working machine or an actuating mechanism, the speed reducer is an independent component consisting of a gear drive, a worm drive and a gear-worm drive which are enclosed in a rigid shell, is usually used as a speed reduction transmission device between the prime mover and the working machine, plays a role in matching rotating speed and transmitting torque between the prime mover and the working machine or the actuating mechanism, and is widely applied to modern machines.
In general, a precision speed reducer is used in a transmission mechanism, and generally, an eccentric workpiece or an eccentric part such as a crankshaft is used to complete a function of mutual conversion between a rotary motion and a reciprocating motion, so that the eccentric part is widely applied to mechanical transmission. In mechanical transmission, the rotation motion is changed into the reciprocating motion, which is usually completed by an eccentric shaft and a crankshaft, and the opening, closing and tightening of the machine are also usually completed by eccentric parts, so that the eccentric parts are widely applied in machine manufacturing.
Under the requirements of high rigidity and high precision, the precision speed reducer requires gapless transmission between an eccentric shaft and a planet wheel, and can transmit larger torque and bear larger impact, so that the eccentric shaft and the planet wheel in the existing speed reducer are connected by adopting a spline, namely, an external spline is arranged on the eccentric shaft, an internal spline is arranged on the planet wheel, and the connection is completed by mutual meshing between the internal spline and the external spline. However, the precision requirement of the internal and external splines is very high, the process difficulty is high, the current domestic precision forging or cold extrusion process cannot meet the requirement, and if the precision forging or cold extrusion process is finished by machine processing, the production cost is increased.
Disclosure of Invention
The invention aims to solve the problems of great process difficulty and high process cost caused by the fact that an eccentric shaft and a planet wheel of an existing speed reducer are connected through a spline.
In order to solve the above problems, the present invention provides a precision reducer eccentric shaft, comprising an integrally formed eccentric shaft body, wherein the eccentric shaft body comprises a first shaft body, a second shaft body, a third shaft body, a fourth shaft body and a fifth shaft body, which are sequentially arranged,
the shaft axes of the first shaft body, the second shaft body and the fifth shaft body are on the same straight line;
the axis of the third shaft body is parallel to the axis of the fourth shaft body, and the axis of the third shaft body and the axis of the fourth shaft body are respectively positioned on different sides of the axis of the fifth shaft body;
the longitudinal section of the first shaft body is a curved surface, and the curved surface comprises a first arc surface, a second arc surface, a third arc surface and a fourth arc surface; wherein,
the first arc surface and the third arc surface are coaxial, and the axis of the first arc surface and the axis of the third arc surface are on the same straight line with the axis of the second shaft body;
the axle center of second arc surface with the axle center of fourth axis body is on same straight line, the axle center of fourth arc surface with the axle center of third axis body is on same straight line.
Optionally, the first arc surface, the second arc surface, the third arc surface, and the fourth arc surface are of an integrated structure.
Optionally, the diameter of the second shaft body is the same as the diameter of the fifth shaft body.
Optionally, the eccentric shaft body is made of rolled or forged carbon steel or alloy steel subjected to cutting processing.
In addition, the invention also provides a precision speed reducer which comprises the precision speed reducer eccentric shaft, a planetary gear assembly and a cycloidal pin gear assembly, wherein the planetary gear assembly and the cycloidal pin gear assembly are in transmission connection through the eccentric shaft body; the eccentric shaft body comprises a first shaft body, a second shaft body, a third shaft body, a fourth shaft body and a fifth shaft body, and the first shaft body, the second shaft body, the third shaft body, the fourth shaft body and the fifth shaft body are of an integrated structure; the longitudinal section of the first shaft body is a curved surface, and the curved surface comprises a first arc surface, a second arc surface, a third arc surface and a fourth arc surface; the first arc surface and the third arc surface are coaxial, and the axis of the first arc surface and the axis of the third arc surface are on the same straight line with the axis of the second shaft body; the axle center of second arc surface with the axle center of fourth axis body is on same straight line, the axle center of fourth arc surface with the axle center of third axis body is on same straight line.
Optionally, the first arc surface, the second arc surface, the third arc surface, and the fourth arc surface are of an integrated structure.
Therefore, the technical scheme provided by the invention has the following beneficial effects: the section of the first shaft body of the eccentric shaft body is a curved surface, the section shape of the curved surface can be formed by adopting a cold extrusion or precision forging process, and the process difficulty and the cost are low; the curved surface further comprises a first arc surface, a second arc surface, a third arc surface and a fourth arc surface which are integrally formed, the first arc surface and the third arc surface are coaxial, the axis of the first arc surface and the axis of the third arc surface are on the same straight line with the axis of the second shaft body, and during machining, the first arc surface and the third arc surface adopt the same machining parameters, so that the centering errors between the first arc surface and the second shaft body as well as between the first arc surface and the fifth shaft body can be reduced; the axis of the second arc surface and the axis of the fourth shaft body are on the same straight line, so that the centering error between the second arc surface and the fourth shaft body can be reduced, and the axis of the fourth arc surface and the axis of the third shaft body are on the same straight line, so that the centering error between the fourth arc surface and the third shaft body can be reduced; therefore, through the design of the first shaft body structure, when the eccentric shaft body is connected with the transmission gear, the problems of high process difficulty and high process cost in spline connection are solved, and the relative position precision between the gear and the third shaft body and between the gear and the fourth shaft body is ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
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, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an eccentric shaft of a precision speed reducer according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a first shaft body of an eccentric shaft of a precision speed reducer according to an embodiment of the present invention.
Description of reference numerals: 1. a first shaft body; 2. a second shaft body; 3. a third shaft body; 4. a fourth shaft body; 5. a fifth shaft body; 6. an eccentric shaft body; 1-1, a first arc surface; 1-2, a second arc surface; 1-3, a third arc surface; 1-4 and a fourth arc surface.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope 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.
Under the requirements of high rigidity and high precision, the precision speed reducer requires gapless transmission between an eccentric shaft and a planet wheel, and can transmit larger torque and bear larger impact, so that the eccentric shaft and the planet wheel in the existing speed reducer are connected by adopting a spline, namely, an external spline is arranged on the eccentric shaft, an internal spline is arranged on the planet wheel, and the connection is completed by mutual meshing between the internal spline and the external spline. However, the precision requirement of the internal and external splines is very high, the process difficulty is high, the current domestic precision forging or cold extrusion process cannot meet the requirement, and if the precision forging or cold extrusion process is finished by machine processing, the production cost is increased. The invention provides an eccentric shaft of a precision speed reducer, which is characterized in that through the structural design of a first shaft body 1, when an eccentric shaft body 6 is connected with a transmission gear, the problems of high process difficulty and high process cost in spline connection are solved, and the relative position precision between the gear and a third shaft body 3 and a fourth shaft body 4 is ensured.
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural diagram of an eccentric shaft of a precision speed reducer, which includes an integrally formed eccentric shaft body 6, wherein the eccentric shaft body 6 is cylindrical, the eccentric shaft body 6 includes a first shaft body 1, a second shaft body 2, a third shaft body 3, a fourth shaft body 4, and a fifth shaft body 5, which are sequentially disposed, wherein,
the axial leads of the first shaft body 1, the second shaft body 2 and the fifth shaft body 5 are on the same straight line;
the axis of the third shaft body 3 is parallel to the axis of the fourth shaft body 4, and the axis of the third shaft body 3 and the axis of the fourth shaft body 4 are respectively positioned at the opposite sides of the axis of the fifth shaft body 5;
as shown in fig. 2, the first shaft body 1 of the eccentric shaft of the precision speed reducer has a longitudinal section of a curved surface, and the curved surface includes a first arc surface 1-1, a second arc surface 1-2, a third arc surface 1-3, and a fourth arc surface 1-4;
the first arc surface 1-1 and the third arc surface 1-3 are coaxial, and the axis of the first arc surface 1-1 and the axis of the third arc surface 1-3 are on the same straight line with the axis of the second shaft body 2; the axle center of second arc surface 1-2 with the axle center of fourth shaft body 4 is on same straight line, the axle center of fourth arc surface 1-4 with the axle center of third shaft body 3 is on same straight line.
Preferably, the first arc surface 1-1, the second arc surface 1-2, the third arc surface 1-3 and the fourth arc surface 1-4 are of an integrated structure.
Preferably, the diameter of the second shaft body 2 is the same as the diameter of the fifth shaft body 5.
Preferably, the eccentric shaft body 6 is made of rolled or forged carbon steel or alloy steel through cutting.
In addition, the eccentric shaft structure provided by the invention can be applied to a precision speed reducer and comprises an eccentric shaft body 6, a planetary gear assembly and a cycloid pin gear assembly, wherein the planetary gear assembly and the cycloid pin gear assembly are in transmission connection through the eccentric shaft body 6, the section of the first shaft body 1 of the eccentric shaft body 6 is a curved surface, the section shape of the curved surface can be formed by adopting a cold extrusion or precision forging process, and the process difficulty and the cost are low; the curved surface further comprises a first arc surface 1-1, a second arc surface 1-2, a third arc surface 1-3 and a fourth arc surface 1-4 which are integrally formed, the first arc surface 1-1 and the third arc surface 1-3 are coaxial, the axis of the first arc surface 1-1 and the axis of the third arc surface 1-3 are on the same straight line with the axis of the second shaft body 2, and during machining, the first arc surface 1-1 and the third arc surface 1-3 adopt the same machining parameters, so that the centering errors between the first arc surface 1-1 and the second shaft body 2 and between the first arc surface 1-3 and the fifth shaft body 5 can be reduced; the axis of the second arc surface 1-2 and the axis of the fourth shaft body 4 are on the same straight line, so that the centering error between the second arc surface and the fourth shaft body 4 can be reduced, and the axis of the fourth arc surface 1-4 and the axis of the third shaft body 3 are on the same straight line, so that the centering error between the fourth arc surface and the third shaft body 3 can be reduced; therefore, through the structural design of the first shaft body 1, when the eccentric shaft body 6 is connected with the transmission gear, the problems of high process difficulty and high process cost in spline connection are solved, and the relative position precision between the gear and the third shaft body 3 and the fourth shaft body 4 is ensured.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (5)
1. The precision speed reducer eccentric shaft comprises an integrally formed eccentric shaft body (6), and is characterized in that the eccentric shaft body (6) comprises a first shaft body (1), a second shaft body (2), a third shaft body (3), a fourth shaft body (4) and a fifth shaft body (5) which are sequentially arranged, wherein,
the axial leads of the first shaft body (1), the second shaft body (2) and the fifth shaft body (5) are on the same straight line;
the axis of the third shaft body (3) is parallel to the axis of the fourth shaft body (4), and the axis of the third shaft body (3) and the axis of the fourth shaft body (4) are respectively positioned on different sides of the axis of the fifth shaft body (5);
the side wall of the first shaft body (1) comprises a first arc surface (1-1), a second arc surface (1-2), a third arc surface (1-3) and a fourth arc surface (1-4);
the first arc surface (1-1) and the third arc surface (1-3) are coaxial, and the axis of the first arc surface (1-1) and the axis of the third arc surface (1-3) are on the same straight line with the axis of the second shaft body (2);
the axle center of second arc surface (1-2) with the axle center of fourth axis body (4) is on same straight line, the axle center of fourth arc surface (1-4) with the axle center of third axis body (3) is on same straight line.
2. The eccentric shaft of the precision reducer according to claim 1, wherein the first arc surface (1-1), the second arc surface (1-2), the third arc surface (1-3) and the fourth arc surface (1-4) are of an integral structure.
3. The precision reducer eccentric shaft according to claim 1, characterized in that the diameter of the second shaft body (2) is the same as the diameter of the fifth shaft body (5).
4. The eccentric shaft of the precision reducer according to claim 1, wherein the eccentric shaft body (6) is made of rolled or forged carbon steel or alloy steel.
5. A precision reducer, characterized in that it comprises an eccentric shaft of the precision reducer according to any one of claims 1 to 4, a planetary gear assembly, a cycloidal-pin gear assembly, said planetary gear assembly and said cycloidal-pin gear assembly being drivingly connected by said eccentric shaft body (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854594.1A CN106369041B (en) | 2016-09-27 | 2016-09-27 | A kind of accurate retarding machine eccentric shaft and accurate retarding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854594.1A CN106369041B (en) | 2016-09-27 | 2016-09-27 | A kind of accurate retarding machine eccentric shaft and accurate retarding machine |
Publications (2)
| Publication Number | Publication Date |
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| CN106369041A CN106369041A (en) | 2017-02-01 |
| CN106369041B true CN106369041B (en) | 2019-11-08 |
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| CN201610854594.1A Expired - Fee Related CN106369041B (en) | 2016-09-27 | 2016-09-27 | A kind of accurate retarding machine eccentric shaft and accurate retarding machine |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109537346B (en) * | 2019-01-08 | 2024-06-18 | 山东力脉智能科技股份有限公司 | Eccentric swinging shaft, manufacturing method thereof and dustpan sieve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994183A (en) * | 2013-02-19 | 2014-08-20 | 住友重机械工业株式会社 | Eccentrically-swinging reduction gear |
| CN204851974U (en) * | 2015-07-22 | 2015-12-09 | 珠海飞马传动机械有限公司 | Speed reducer eccentric shaft gear |
| CN105736679A (en) * | 2014-12-25 | 2016-07-06 | 纳博特斯克有限公司 | Speed reducer group, speed reducer and design method of speed reducer |
| CN105736639A (en) * | 2014-12-25 | 2016-07-06 | 纳博特斯克有限公司 | Reduction gear device group, reduction gear device and design method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6448992B2 (en) * | 2014-11-19 | 2019-01-09 | ナブテスコ株式会社 | Gear device |
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- 2016-09-27 CN CN201610854594.1A patent/CN106369041B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994183A (en) * | 2013-02-19 | 2014-08-20 | 住友重机械工业株式会社 | Eccentrically-swinging reduction gear |
| CN105736679A (en) * | 2014-12-25 | 2016-07-06 | 纳博特斯克有限公司 | Speed reducer group, speed reducer and design method of speed reducer |
| CN105736639A (en) * | 2014-12-25 | 2016-07-06 | 纳博特斯克有限公司 | Reduction gear device group, reduction gear device and design method |
| CN204851974U (en) * | 2015-07-22 | 2015-12-09 | 珠海飞马传动机械有限公司 | Speed reducer eccentric shaft gear |
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| CN106369041A (en) | 2017-02-01 |
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