CN111022588A - Differential cycloidal gear speed change device - Google Patents
Differential cycloidal gear speed change device Download PDFInfo
- Publication number
- CN111022588A CN111022588A CN201911202117.7A CN201911202117A CN111022588A CN 111022588 A CN111022588 A CN 111022588A CN 201911202117 A CN201911202117 A CN 201911202117A CN 111022588 A CN111022588 A CN 111022588A
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- CN
- China
- Prior art keywords
- tooth
- epicycloidal
- teeth
- gear
- hypocycloidal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 230000002093 peripheral Effects 0.000 claims abstract description 11
- 230000000875 corresponding Effects 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims description 5
- 230000023298 conjugation with cellular fusion Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000021037 unidirectional conjugation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000003638 reducing agent Substances 0.000 description 1
- 238000007789 sealing 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
- 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
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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
-
- 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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/028—Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise
-
- 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
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
-
- 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
- F16H2001/327—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 with orbital gear sets comprising an internally toothed ring gear
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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
- F16H2055/176—Ring gears with inner teeth
Abstract
The invention relates to the technical field of mechanical transmission, and particularly discloses a differential cycloidal gear speed change device which comprises a cycloidal gear, wherein the cycloidal gear is eccentrically driven by an input shaft in the speed change device, a first epicycloidal tooth is arranged on the outer peripheral surface of the cycloidal gear, a first hypocycloidal tooth is arranged on the inner wall of a mounting cavity corresponding to the first epicycloidal tooth, the number of tooth profiles of the first hypocycloidal tooth is larger than that of the first epicycloidal tooth to form meshed cycloidal motion, a second hypocycloidal tooth and a second epicycloidal tooth are arranged between the cycloidal tooth and an output shaft of the speed change device, the number of tooth profiles of the second hypocycloidal tooth is larger than that of the second epicycloidal tooth to form meshed cycloidal motion, and the number of tooth profiles of the first epicycloidal tooth is larger than or smaller than that of the second epicycloidal tooth profile. A differential cycloid gear shifting device having a high gear ratio or a low gear ratio with a shifting structure composed of cycloid gears is provided.
Description
Technical Field
The invention relates to the technical field of mechanical transmission, in particular to a differential cycloidal gear speed change device.
Background
At present, a transmission device applied to a precision servo mechanism of a robot, a precision machine tool, aerospace and the like is required to have the characteristics of high transmission precision, high transmission rigidity, large transmission ratio, high transmission efficiency, small volume, light weight, small transmission return difference, small rotational inertia of a rotating part and the like.
The prior art discloses a 201710375741.1 patent named as 'double cycloid pin gear speed reduction ratio difference speed reduction cycloid pin gear speed reducer', which discloses that double cycloid gears are installed in a large pin gear shell and a small pin gear shell which correspond to each other, large and small cycloid surfaces of the double cycloid gears are meshed through needle rollers installed on the large pin gear shell and the small pin gear shell, the large pin gear shell and the small pin gear shell are installed together through bearings, an eccentric shaft is respectively assembled with the large pin gear shell, the double cycloid gear and the small pin gear shell through the bearings, the double cycloid gears perform cycloid movement in the large pin gear shell and the small pin gear shell when the eccentric shaft rotates, and because the large cycloid gear and the small cycloid gear have different speed reduction ratios, and the two cycloid gears are fixed together, the pin gear shell corresponding to the large cycloid gear and the pin gear shell corresponding to the small cycloid gear have a rotation speed difference, and speed reduction is formed by utilizing the rotation speed difference.
The double cycloid wheels are meshed with the roller pins arranged on the large needle gear shell and the small needle gear shell, the number of parts is large, the installation process is complex, the difficulty is high, the precision is difficult to guarantee, friction between the parts is increased due to the arrangement of the roller pins, the stability of rotation is influenced, and the double cycloid wheels are only high in transmission ratio, free of low transmission ratio and small in application range.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a differential cycloidal gear speed change device which is composed of two-stage cycloidal gears and has a high transmission ratio or a low transmission ratio.
In order to achieve the purpose, the invention adopts the technical scheme that: a differential cycloidal gear speed change device comprises a cycloidal gear, wherein a mounting cavity for mounting the cycloidal gear is arranged on a machine body of the speed change device, the cycloidal gear is eccentrically driven by an input shaft in the speed change device, first epicycloidal teeth are arranged on the outer peripheral surface of the cycloidal gear, first hypocycloidal teeth are arranged on the inner wall, corresponding to the first epicycloidal teeth, of the mounting cavity, the tooth profile number of the first hypocycloidal teeth is larger than that of the first epicycloidal teeth to form meshed cycloidal motion, second hypocycloidal teeth and second epicycloidal teeth are arranged between the cycloidal gear and an output shaft of the speed change device, the tooth profile number of the second hypocycloidal teeth is larger than that of the second epicycloidal teeth to form meshed cycloidal motion, and the tooth profile number of the first epicycloidal teeth is larger than or smaller than that of the second epicycloidal teeth.
In the above technical scheme, the first epicycloidal tooth and the first hypocycloidal tooth constitute a primary speed change, the second epicycloidal tooth and the second hypocycloidal tooth constitute a secondary speed change, the number of tooth profiles of the first epicycloidal tooth may be larger than that of the second epicycloidal tooth or smaller than that of the second epicycloidal tooth, and the output shaft is driven by the cycloidal gear.
As a further arrangement of the present invention, the second epicycloidal tooth is arranged on the outer peripheral surface of the cycloid gear, the first epicycloidal tooth and the second epicycloidal tooth are distributed up and down, the output shaft is sleeved on the second epicycloidal tooth of the cycloid gear, and the second hypocycloidal tooth is arranged on the matching surface of the output shaft sleeved with the cycloid gear and meshed with the second epicycloidal tooth.
In the above technical scheme, when the first epicycloidal tooth and the second epicycloidal tooth are both arranged on the outer peripheral surface of the cycloid gear,the "+" input and output directions are the same, which is a high ratio.
As a further arrangement of the present invention, the second epicycloidal tooth is arranged on the outer peripheral surface of the output shaft, the cycloid gear is sleeved on the second epicycloidal tooth of the output shaft, and the second hypocycloidal tooth is arranged on the matching surface of the cycloid gear and the output shaft, and is meshed with the second epicycloidal tooth.
In the technical proposal, the device comprises a base,the "-" input and output directions are reversed, which is a low ratio.
As a further development of the invention, the number of teeth of the first hypocycloidal tooth is 1 more than the number of teeth of the first epicycloidal tooth, and the number of teeth of the second hypocycloidal tooth is 1 more than the number of teeth of the second epicycloidal tooth.
In the above technical scheme, the number of the first hypocycloidal teeth may be 1-n more than the number of the first epicycloidal teeth, the number of the second hypocycloidal teeth is 1-n more than the number of the second epicycloidal teeth, preferably, the number of the first hypocycloidal teeth is 1 more than the number of the first epicycloidal teeth, and the number of the second hypocycloidal teeth is 1 more than the number of the second epicycloidal teeth, so that the deceleration is stable, the noise is small, and the service life is long.
The invention is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a structural sectional view of embodiment 1 of the present invention;
FIG. 2 is an exploded view of the structure of embodiment 1 of the present invention;
FIG. 3 is an exploded view of the structure of embodiment 1 of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 1;
FIG. 5 is a cross-sectional view B-B of FIG. 2;
FIG. 6 is a structural sectional view of embodiment 2 of the present invention;
FIG. 7 is an exploded view of the structure of embodiment 2 of the present invention;
FIG. 8 is an exploded view of the structure of embodiment 2 of the present invention;
FIG. 9 is a cross-sectional view A-A of FIG. 6;
fig. 10 is a sectional view taken along line B-B of fig. 6.
Detailed Description
Detailed description of the inventionas shown in fig. 1-10, a differential cycloid gear transmission includes a cycloid gear 1, a mounting cavity 21 for mounting the cycloid gear 1 is provided on a transmission body 2, wherein, the cycloid gear 1 is eccentrically driven by an input shaft 3 in the speed changing device, a first epicycloidal tooth A1 is arranged on the peripheral surface of the cycloid gear 1, a first hypocycloidal tooth A2 is arranged on the inner wall of the installation cavity 21 corresponding to the first epicycloidal tooth A1, the number of teeth of the first hypocycloidal tooth a2 being greater than the number of teeth of the first epicycloidal tooth a1 constitutes a meshed cycloidal motion, a second hypocycloidal tooth B2 and a second epicycloidal tooth B1 are arranged between the cycloid gear 1 and the output shaft 4 of the speed change device, the number of the tooth profiles of the second hypocycloidal tooth B2 is larger than that of the second epicycloidal tooth B1 to form meshed cycloidal motion, and the number of the tooth profiles of the first epicycloidal tooth A1 is larger than or smaller than that of the second epicycloidal tooth B1. The first epicycloidal tooth a1 and the second epicycloidal tooth B1 or the first epicycloidal tooth a1 and the second hypocycloidal tooth B2 are coaxially arranged.
A cycloid gear: the tooth profile is a cycloidal disk-shaped or circular ring-shaped gear with an equidistant curve shape.
Hypocycloid: a moving circle is inscribed in a fixed circle to roll without sliding, and the track of a fixed point on the circumference of the moving circle is called hypocycloid.
Epicycloid: when a moving circle having a radius b rolls along the outer side of a fixed circle having a radius a without sliding, the locus of a point described by a point p on the circumference of the moving circle is called an epicycloid.
The machine body 2, the input shaft 3, the cycloid gear 1 and the output shaft 4 need to be provided with necessary bearings or rollers, roller holders, oil seals, sealing rings, connecting screws and the like, which are not described in detail herein, for convenience of installation, the machine body 2 may be a combined upper and lower structure, the first epicycloidal tooth a1 and the first hypocycloidal tooth a2 constitute a primary speed change, the second epicycloidal tooth B1 and the second hypocycloidal tooth B2 constitute a secondary speed change, the number of tooth profiles of the first epicycloidal tooth a1 may be greater than that of the second epicycloidal tooth B1 or less than that of the second epicycloidal tooth B1, and the difference between the first epicycloidal tooth a1 and the second epicycloidal tooth B1 may be 1-n, the two cases may bring different transmission ratios, and the output shaft 4 is driven by the cycloid gear 1.
Embodiment 1, as shown in fig. 1 to 5, the second epicycloidal tooth B1 is disposed on the outer peripheral surface of the cycloid gear 1, the first epicycloidal tooth a1 and the second epicycloidal tooth B1 are vertically distributed, the output shaft 4 is sleeved on the second epicycloidal tooth B1 of the cycloid gear 1, and the second hypocycloidal tooth B2 is disposed on the mating surface where the output shaft 4 is sleeved with the cycloid gear 1 and is meshed with the second epicycloidal tooth B1.
When the first epicycloidal tooth a1 and the second epicycloidal tooth B1 are both provided on the outer circumferential surface of the cycloid gear 1,the "+" input and output directions are the same, which is a high ratio.
Embodiment 2, as shown in fig. 6 to 10, the second epicycloidal tooth B1 is provided on the outer peripheral surface of the output shaft 4, the cycloid gear 1 is fitted over the second epicycloidal tooth B1 of the output shaft 4, and the second hypocycloidal tooth B2 is provided on the mating surface where the cycloid gear 1 is fitted over the output shaft 4 and is meshed with the second epicycloidal tooth B1.
The "-" input and output directions are reversed, which is a low ratio.
The number of the first hypocycloidal teeth a2 is 1 larger than that of the first epicycloidal teeth a1, and the number of the second hypocycloidal teeth B2 is 1 larger than that of the second epicycloidal teeth B1. The number of the tooth profiles of the first hypocycloid tooth a2 can be 1-n more than that of the first epicycloid tooth a1, the tooth profile of the second hypocycloid tooth B2 is 1-n more than that of the second epicycloid tooth B1, preferably, the tooth profile of the first hypocycloid tooth a2 is 1 more than that of the first epicycloid tooth a1, the tooth profile of the second hypocycloid tooth B2 is 1 more than that of the second epicycloid tooth B1, when the difference is greater than 1, such as 2 and 3 … …, and so on, when the difference is not 1, the transmission ratio formula needs to be adjusted accordingly, the deceleration is stable, the noise is small, and the service life is long.
The present invention is not limited to the above embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention.
Claims (4)
1. The utility model provides a differential cycloid gear speed change device, includes cycloid gear, and the installation cavity that supplies cycloid gear installation sets up on speed change device's organism, and wherein, cycloid gear is by the eccentric drive of the input shaft among the speed change device, its characterized in that: the outer peripheral surface of the cycloid gear is provided with first epicycloidal teeth, the inner wall of the mounting cavity corresponding to the first epicycloidal teeth is provided with first hypocycloidal teeth, the number of tooth profiles of the first hypocycloidal teeth is larger than that of the first epicycloidal teeth to form meshed cycloid movement, second hypocycloidal teeth and second epicycloidal teeth are arranged between the cycloid gear and the output shaft of the speed changing device, the number of tooth profiles of the second hypocycloidal teeth is larger than that of the second epicycloidal teeth to form meshed cycloid movement, and the number of tooth profiles of the first epicycloidal teeth is larger than or smaller than that of the second epicycloidal teeth.
2. The differential cycloidal gear change of claim 1, wherein: the second epicycloid tooth is arranged on the outer peripheral surface of the cycloid gear, the first epicycloid tooth and the second epicycloid tooth are distributed up and down, the output shaft is sleeved on the second epicycloid tooth of the cycloid gear, and the second hypocycloid tooth is arranged on a matching surface where the output shaft is sleeved with the cycloid gear and meshed with the second epicycloid tooth.
3. The differential cycloidal gear change of claim 1, wherein: the second epicycloid tooth is arranged on the peripheral surface of the output shaft, the cycloid gear is sleeved on the second epicycloid tooth of the output shaft, and the second hypocycloid tooth is arranged on a matching surface of the cycloid gear, which is sleeved with the output shaft, and is meshed with the second epicycloid tooth.
4. The differential cycloidal gear transmission according to claim 1, 2 or 3, wherein: the number of teeth of the first hypocycloidal tooth is 1 more than the number of teeth of the first epicycloidal tooth, and the number of teeth of the second hypocycloidal tooth is 1 more than the number of teeth of the second epicycloidal tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911202117.7A CN111022588A (en) | 2019-11-29 | 2019-11-29 | Differential cycloidal gear speed change device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911202117.7A CN111022588A (en) | 2019-11-29 | 2019-11-29 | Differential cycloidal gear speed change device |
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| Publication Number | Publication Date |
|---|---|
| CN111022588A true CN111022588A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911202117.7A Pending CN111022588A (en) | 2019-11-29 | 2019-11-29 | Differential cycloidal gear speed change device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111022588A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677819A (en) * | 2020-06-17 | 2020-09-18 | 祝宗煌 | Differential speed reducing mechanism and differential speed reducer |
-
2019
- 2019-11-29 CN CN201911202117.7A patent/CN111022588A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677819A (en) * | 2020-06-17 | 2020-09-18 | 祝宗煌 | Differential speed reducing mechanism and differential speed reducer |
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