CN211009753U - Differential cycloidal gear speed change device - Google Patents
Differential cycloidal gear speed change device Download PDFInfo
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- CN211009753U CN211009753U CN201921875008.7U CN201921875008U CN211009753U CN 211009753 U CN211009753 U CN 211009753U CN 201921875008 U CN201921875008 U CN 201921875008U CN 211009753 U CN211009753 U CN 211009753U
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Abstract
The utility model relates to the technical field of mechanical transmission, in particular to a differential cycloid gear speed change device, which comprises a cycloid disc, a mounting cavity for installing the cycloid disc is arranged on a machine body of the speed change device, a swing structure for a first ball to do cycloid motion is arranged between the surface A of the cycloid disc and the opposite surface of the mounting cavity opposite to the surface A, a cycloid groove and a second ball fixing hole are arranged between the surface B of the cycloid disc and an output shaft of the speed change device, a second ball is arranged between the cycloid groove and the second ball fixing hole, a first cycloid gear is arranged on the outer circumferential surface of the cycloid disc, a second cycloid gear is arranged on the inner wall of the mounting cavity corresponding to the first cycloid gear, the number of tooth profiles of the second cycloid gear is larger than that of the first cycloid gear, when the cycloid groove is an outer cycloid groove, the number of tooth profiles of the second cycloid gear is larger than or smaller than that of the second ball, when the cycloid groove is an inner cycloid groove, the number of tooth profiles of the second cycloid gear is larger than or smaller than that of the cycloid groove.
Description
Technical Field
The utility model relates to a mechanical transmission technical field, especially a carry out modified differential cycloid gear speed change gear to prior application "differential cycloid gear speed change gear".
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 applicant has previously filed a prior application with the name of 'differential cycloid speed change device' with the application number of 201910549808.8, and the speed change function is realized by adopting two cycloid grooves with different tooth profile numbers arranged on the same cycloid disc, the cycloid disc is clamped in a machine body through a cover plate and an output shaft and swings in the air, the peripheral surface of the cycloid disc cannot collide with the inner wall of an installation cavity, and the technical scheme has the following defects that firstly, if the parts are pressed too tightly, the friction force of the swinging of the cycloid disc can be increased, and secondly, if gaps are generated among the parts, the swinging of the cycloid disc is unstable.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a speed change structure consisting of a cycloid groove and a cycloid gear, and a differential cycloid gear speed change device with high transmission ratio or low transmission ratio.
In order to realize the purpose, the utility model discloses a technical scheme is: a differential cycloid gear speed change device comprises a cycloid disc, wherein the axial two end faces of the cycloid disc are respectively an A face and a B face, the A face and the B face of the cycloid disc are respectively provided with a plurality of first balls and second balls which are distributed along the circumferential direction, an installation cavity for installing the cycloid disc is arranged on a machine body of the speed change device, the cycloid disc is eccentrically driven by an input shaft in the speed change device, a swing structure for the first balls to do cycloid motion is arranged between the A face of the cycloid disc and an opposite face, opposite to the A face, on the installation cavity, a cycloid groove and a plurality of second ball fixing holes which are distributed along the circumferential direction are arranged between the B face of the cycloid disc and an output shaft of the speed change device, the cycloid groove is an outer cycloid groove or an inner cycloid groove, the second balls are arranged between the cycloid groove and the second ball fixing holes, a first cycloid gear is arranged on the outer peripheral face of the cycloid disc, and a second cycloid gear is arranged on an inner wall, corresponding to the first cycloid gear, on the installation cavity, the number of tooth profiles of the second cycloid gear is larger than that of the first cycloid gear to form meshed cycloid movement, when the cycloid groove is an outer cycloid groove, the number of tooth profiles of the second cycloid gear is larger than or smaller than the number of the second balls to enable the cycloid disc to do cycloid variable speed movement, when the cycloid groove is an inner cycloid groove, the number of tooth profiles of the second cycloid gear is larger than or smaller than that of the cycloid groove to enable the cycloid disc to do cycloid variable speed movement, and the output shaft is driven by the cycloid disc.
Among the above-mentioned technical scheme, swing structure's setting is the A face butt of avoiding the cycloid dish on the inner wall of organism, play and reduce the friction, make things convenient for the effect that the assembly compresses tightly, the second cycloid gear, first cycloid gear, second cycloid groove and second ball constitute speed change structure, when the tooth profile number of second cycloid gear is different with the great that's of cycloid groove and second ball value ratio, the drive ratio of variable speed is also different, and when the position that cycloid groove and second ball fixed orifices set up was different, correspond high drive ratio and low drive ratio respectively.
As a further arrangement of the present invention, the tooth profile number of the second cycloid gear is 1 more than that of the first cycloid gear, and the number of the second balls is 1 more or 1 less than that of the cycloid grooves.
In the above technical solution, preferably, a difference between the number of tooth profiles of the second cycloid gear and the number of tooth profiles of the first cycloid gear is 1, and a difference between the number of the second balls and the number of tooth profiles of the cycloid grooves is also 1, where the diameters of the first ball and the second ball are not limited, and the diameters of the first ball and the second ball may be the same or different.
As a further setting of the utility model, swing structure is including setting up first ball fixed orifices and butt plane on the A face of cycloid dish and installation cavity between the opposite face relative with the A face, and first ball is arranged in and is the cycloid between first ball fixed orifices and the butt plane.
Among the above-mentioned technical scheme, some inlays of first ball and establishes in first ball fixed orifices, and another part exposes outside first ball fixed orifices and the butt is the cycloid rolling motion on the butt plane, and first ball fixed orifices carries on spacingly to first ball, avoids first ball to run indiscriminately, can reduce frictional force, makes things convenient for the assembly again to compress tightly.
As a further setting of the utility model, swing structure is including setting up ring channel and butt plane on the A face of cycloid dish and installation cavity between the opposite face relative with the A face, and first ball is arranged in and is the cycloid between ring channel and the butt plane.
Among the above-mentioned technical scheme, some of first ball inlays to be established in the ring channel, and another part exposes outside the ring channel and the butt is the cycloid rolling motion on the butt plane, and the ring channel carries on spacingly to first ball, avoids first ball to run indiscriminately, can reduce frictional force, and convenient assembly compresses tightly again, and the width of this ring channel can also be greater than the maximum width that first ball fell into the ring channel with the big or small adaptation of first ball.
As a further setting of the utility model, swing structure is including setting up ring channel and the first ball fixed orifices between the opposite face relative with the A face on the A face of cycloid dish and installation cavity, and first ball is arranged in and is the cycloid motion between ring channel and the first ball fixed orifices, the radial swing distance of first ball in the ring channel equals the eccentric value.
Among the above-mentioned technical scheme, a part of first ball falls into first ball fixed orifices, and another part falls into the ring channel and is cycloid rolling motion, and first ball fixed orifices is to first ball limiting displacement, avoids first ball mutual collision in the ring channel, can reduce frictional force, and convenient assembly compresses tightly again, and the width of this place ring channel is greater than the maximum width that first ball fell into the ring channel, just differs at least one eccentric value.
As a further setting of the utility model, the cycloid groove is outer cycloid groove, the cycloid groove sets up on the opposite face that the B face of output shaft and cycloid dish is relative, and second ball fixed orifices sets up on the B face of cycloid dish.
In the above technical solution, the number of tooth profiles of the second cycloid gear may be smaller than or larger than the number of second balls,
the "-" input and output directions are reversed, which is a low ratio.
As a further setting of the utility model, the cycloid groove is outer cycloid groove, the cycloid groove sets up on the B face of cycloid dish, and second ball fixed orifices sets up on the opposite face that the B face of output shaft and cycloid dish is relative.
In the above technical solution, the number of tooth profiles of the second cycloid gear may be smaller than or larger than the number of second balls,
the "-" input and output directions are reversed, which is a high ratio.
As a further setting of the utility model, the cycloid groove is interior cycloid groove, the cycloid groove sets up on the opposite face that the B face of output shaft and cycloid dish is relative, and second ball fixed orifices sets up on the B face of cycloid dish.
In the above technical scheme, the number of tooth profiles of the second cycloid gear can be smaller than or larger than that of the cycloid groove,
the "-" input and output directions are reversed, which is a high ratio.
As a further setting of the utility model, the cycloid groove is interior cycloid groove, the cycloid groove sets up on the B face of cycloid dish, and second ball fixed orifices sets up on the opposite face that the B face of output shaft and cycloid dish is relative.
In the above technical scheme, the number of the tooth profiles of the second cycloid gear can be smaller than that of the cycloid grooveThe number of the tooth profiles can be larger than that of the cycloid grooves,
the "-" input and output directions are reversed, which is a low ratio.
By adopting the scheme, the high transmission ratio or the low transmission ratio can be realized by changing the position relation of the second ball fixing hole and the cycloid groove or the conversion of the inner cycloid groove and the outer cycloid groove, so that the problem that the transmission ratio of the conventional transmission structure is low is solved, the structure is stable, and the transmission structure is suitable for more occasions.
The present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a sectional view of the structure of the embodiment of the present invention;
FIG. 2 is a sectional view of the structure of the embodiment of the present invention;
FIG. 3 is a sectional view of the structure of the embodiment of the present invention;
FIG. 4 is an exploded view of the structure of the embodiment of the present invention;
FIG. 5 is an exploded view of the structure of the embodiment of the present invention;
FIG. 6 is an exploded view of the structure of the embodiment of the present invention;
FIG. 7 is an exploded view of the structure of the embodiment of the present invention;
FIG. 8 is a side view of the structure of an embodiment of the present invention;
FIG. 9 is a cross-sectional view A-A of FIG. 8;
fig. 10 is a cross-sectional view a-a of fig. 8.
Detailed Description
The specific embodiment of the utility model is shown in fig. 1-10, a differential cycloid gear speed change device, comprising a cycloid disc 1, the axial two end surfaces of the cycloid disc 1 are respectively a surface and B surface, the a surface and the B surface of the cycloid disc 1 are respectively provided with a plurality of first balls A1 and second balls B1 distributed around the circumference, the device also comprises a device body 2, an input shaft 3 and an output shaft 4, the device body 2 is provided with an installation cavity 21 for installing the cycloid disc 1, the cycloid disc 1 is eccentrically driven by the input shaft 3, a swing structure for the first balls A1 to do cycloid motion is arranged between the opposite surfaces of the a surface and the installation cavity 21 opposite to the a surface, a cycloid groove 01 and a plurality of second ball fixing holes 02 distributed around the circumference are arranged between the B surface of the cycloid disc 1 and the output shaft 4 of the speed change device, the cycloid groove 01 is an outer cycloid groove or an inner cycloid groove, the second ball B1 is arranged between the cycloid groove 01 and the second ball fixing holes 02, the cycloidal disc comprises a cycloidal disc 1 and an output shaft 4, wherein a first cycloidal gear 11 is arranged on the outer peripheral surface of the cycloidal disc 1, a second cycloidal gear 211 is arranged on the inner wall of a mounting cavity 21 corresponding to the first cycloidal gear 11, the number of tooth profiles of the second cycloidal gear 211 is larger than that of the first cycloidal gear 11 to form meshed cycloidal motion, when a cycloidal groove 01 is an outer cycloidal groove, the number of tooth profiles of the second cycloidal gear 211 is larger than or smaller than that of second balls B1 to enable the cycloidal disc 1 to do cycloidal variable speed motion, when the cycloidal groove 01 is an inner cycloidal groove, the number of tooth profiles of the second cycloidal gear 211 is larger than or smaller than that of the cycloidal groove 01 to enable the cycloidal disc 1 to do cycloidal variable speed motion.
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 tooth profile on the cycloid groove can also be considered as an epicycloid outwards and a hypocycloid inwards.
The tooth profile of the cycloid gear is a disc-shaped or circular gear with the shape of a cycloid and an equidistant curve.
The crossed ball bearing 22 is arranged between the output shaft 4 and the machine body 2, and in addition, a plurality of necessary bearings or rollers, roller holders, oil seals, sealing rings, connecting screws and the like are required to be arranged between the parts, which are not detailed herein, the arrangement of the swing structure is to prevent the surface A of the cycloid disc 1 from abutting on the inner wall of the machine body 2 to play the roles of reducing friction and facilitating assembly and pressing, the second cycloid gear 211, the first cycloid gear 11, the second cycloid groove 01 and the second ball B1 form a speed change structure, when the ratio of the tooth profile number of the second cycloid gear 211 to the larger one of the cycloid groove 01 and the second ball B1 is different, the transmission ratio of speed change is different, and when the positions of the cycloid groove 01 and the second ball fixing hole 02 are different, the tooth profile number of the first cycloid gear 11 can be smaller than the tooth profile number of the second cycloid groove 01, or the number of the tooth profiles can be larger than that of the second cycloid groove 01.
The number of tooth profiles of the second cycloid gear 211 is 1 more than that of the first cycloid gear 11, and the number of the second balls B1 is 1 more or less than that of the cycloid grooves 01. Preferably, the difference between the number of tooth profiles of the second cycloid gear 211 and the number of tooth profiles of the first cycloid gear 11 is 1, and the difference between the number of the second balls B1 and the number of tooth profiles of the cycloid grooves 01 is 1, where the diameters of the first ball a1 and the second ball B1 are not limited, and the diameters of the first ball a1 and the second ball B1 may be the same or different.
In embodiment 1, the cycloid groove 01 is an outer cycloid groove, the cycloid groove 01 is disposed on the opposite surface of the output shaft 4 opposite to the surface B of the cycloid disc 1, and the second ball fixing hole 02 is disposed on the surface B of the cycloid disc 1. The number of tooth profiles of the second cycloid gear 211 may be smaller than the number of the second balls B1, or may be larger than the number of the second balls B1,
the "-" input and output directions are reversed, which is a low ratio.
In embodiment 2, as shown in fig. 4 and 6, the cycloid groove 01 is an outer cycloid groove, the cycloid groove 01 is disposed on the B-plane of the cycloid disc 1, and the second ball fixing hole 02 is disposed on the opposite surface of the output shaft 4 opposite to the B-plane of the cycloid disc 1. The number of tooth profiles of the second cycloid gear 211 may be smaller than the number of the second balls B1, or may be larger than the number of the second balls B1,
the "-" input and output directions are reversed, which is a high ratio.
The utility model discloses do not confine the above-mentioned embodiment to, the general technical personnel in this field can adopt other multiple embodiments to implement according to the utility model discloses a, perhaps all adopt the utility model discloses a design structure and thinking do simple change or change, all fall into the utility model discloses a protection scope.
Claims (9)
1. The utility model provides a differential cycloid gear speed change device, includes the cycloid dish, the axial both ends face of cycloid dish is A face and B face respectively, is provided with the first ball of a plurality of and the second ball that distribute around circumference on the A face and the B face of cycloid dish respectively, its characterized in that: the installation cavity for installing the cycloid disc is arranged on a machine body of the speed change device, wherein the cycloid disc is eccentrically driven by an input shaft in the speed change device, a swing structure for enabling first balls to do cycloid motion is arranged between an A surface of the cycloid disc and an opposite surface, opposite to the A surface, on the installation cavity, a cycloid groove and a plurality of second ball fixing holes distributed circumferentially are arranged between a B surface of the cycloid disc and an output shaft of the speed change device, the cycloid groove is an outer cycloid groove or an inner cycloid groove, the second balls are arranged between the cycloid groove and the second ball fixing holes, a first cycloid gear is arranged on the outer circumferential surface of the cycloid disc, a second cycloid gear is arranged on the inner wall, corresponding to the first cycloid gear, on the installation cavity, the number of tooth profiles of the second cycloid gear is larger than that of the first cycloid gear to form meshed cycloid motion, and when the cycloid groove is the outer cycloid groove, the number of tooth profiles of the second cycloid gear is larger than or smaller than that of the second balls to enable the cycloid disc to do speed change motion, when the cycloid groove is an inner cycloid groove, the number of tooth profiles of the second cycloid gear is larger than or smaller than that of the cycloid groove, so that the cycloid disc performs cycloid variable speed motion, and the output shaft is driven by the cycloid disc.
2. The differential cycloidal gear change of claim 1, wherein: the number of the tooth profiles of the second cycloid gears is 1 more than that of the first cycloid gears, and the number of the second balls is 1 more or less than that of the cycloid grooves.
3. The differential cycloidal gear change of claim 2, wherein: the swing structure comprises a first ball fixing hole and a butting plane which are arranged on the surface A of the swing wire disc and the mounting cavity and between the opposite surfaces opposite to the surface A, and the first ball is arranged between the first ball fixing hole and the butting plane to perform cycloidal motion.
4. The differential cycloidal gear change of claim 2, wherein: the swing structure comprises an annular groove and a butting plane which are arranged on the surface A of the swing wire disc and the opposite surface of the installation cavity opposite to the surface A, and the first ball is arranged between the annular groove and the butting plane to perform swing motion.
5. The differential cycloidal gear change of claim 2, wherein: the swing structure comprises an annular groove and a first ball fixing hole which are arranged on the A surface of the swing wire disc and the mounting cavity and between opposite surfaces opposite to the A surface, the first ball is arranged between the annular groove and the first ball fixing hole to move in a cycloid mode, and the radial swing distance of the first ball in the annular groove is equal to the eccentric amount.
6. The differential cycloidal gear transmission according to any one of claims 1-5, wherein: the swing groove is an outer swing groove, the swing groove is arranged on the opposite surface of the output shaft opposite to the surface B of the swing disc, and the second ball fixing hole is formed in the surface B of the swing disc.
7. The differential cycloidal gear transmission according to any one of claims 1-5, wherein: the swing groove is an outer swing groove, the swing groove is formed in the surface B of the swing disc, and the second ball fixing hole is formed in the opposite surface, opposite to the surface B of the swing disc, of the output shaft.
8. The differential cycloidal gear transmission according to any one of claims 1-5, wherein: the swing groove is an inner swing groove, the swing groove is arranged on the opposite surface of the output shaft opposite to the surface B of the swing disc, and the second ball fixing hole is formed in the surface B of the swing disc.
9. The differential cycloidal gear transmission according to any one of claims 1-5, wherein: the swing groove is an inner swing groove, the swing groove is formed in the surface B of the swing disc, and the second ball fixing hole is formed in the opposite surface, opposite to the surface B of the swing disc, of the output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921875008.7U CN211009753U (en) | 2019-11-01 | 2019-11-01 | Differential cycloidal gear speed change device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921875008.7U CN211009753U (en) | 2019-11-01 | 2019-11-01 | Differential cycloidal gear speed change device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211009753U true CN211009753U (en) | 2020-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921875008.7U Active CN211009753U (en) | 2019-11-01 | 2019-11-01 | Differential cycloidal gear speed change device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211009753U (en) |
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2019
- 2019-11-01 CN CN201921875008.7U patent/CN211009753U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ZHEJIANG UNIVERSE FILTER Co. Assignor: HSOAR GROUP Co.,Ltd. Contract record no.: X2021330000378 Denomination of utility model: Differential cycloidal gear speed change device Granted publication date: 20200714 License type: Common License Record date: 20211009 |
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| EE01 | Entry into force of recordation of patent licensing contract |