CN211009754U - Differential cycloid speed variator - Google Patents
Differential cycloid speed variator Download PDFInfo
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- CN211009754U CN211009754U CN201921877387.3U CN201921877387U CN211009754U CN 211009754 U CN211009754 U CN 211009754U CN 201921877387 U CN201921877387 U CN 201921877387U CN 211009754 U CN211009754 U CN 211009754U
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Abstract
The utility model relates to the technical field of mechanical transmission, in particular to a differential cycloid speed change device, which comprises a cycloid disc, wherein a surface A and a surface B of the cycloid disc are respectively provided with a first ball and a second ball, an 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 gear, a first cycloid groove and a first ball fixing hole are arranged between the surface A of the cycloid disc and the opposite surface of the installation cavity opposite to the surface A, a second cycloid groove and a second ball fixing hole are arranged between the surface B of the cycloid disc and the output shaft of the speed change gear, the first cycloid groove and the second cycloid groove are both inner cycloid grooves, the number of the tooth profiles of the first cycloid groove is smaller than or larger than that of the second cycloid groove, the first ball is arranged between the first cycloid groove and the first ball fixing hole, and the second ball is arranged between the second cycloid groove and the second ball fixing hole, so that the cycloid disc does cycloid movement.
Description
Technical Field
The utility model relates to a mechanical transmission technical field, especially a carry out modified differential cycloid speed change gear to prior application "vector cycloid speed change unit".
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 technical scheme is that when the cycloidal disk is used, an input structure and an output structure need to be additionally connected, so that the problem of small transmission exists, and the volume of the combined general input structure and output structure and the speed change unit is large.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiencies of the prior art, the present invention provides a differential cycloidal transmission having a high or low transmission ratio.
In order to realize the purpose, the utility model discloses a technical scheme is: a differential cycloid speed change device comprises a cycloid disc, wherein the two axial 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, a mounting cavity for mounting 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 first cycloid groove and a plurality of first ball fixing holes which are distributed along the circumferential direction are arranged between the A face of the cycloid disc and the opposite face of the mounting cavity opposite to the A face, a second 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 first cycloid groove and the second cycloid groove are inner cycloid grooves, the number of the first balls is 1-n less than that the number of tooth profiles of the first cycloid groove, the number of the second balls is 1-n less than that of the tooth profiles of the second cycloid groove, the number of the tooth profiles of the first cycloid groove is smaller than or larger than that of the second cycloid groove, the first ball is arranged between the first cycloid groove and the first ball fixing hole, and the second ball is arranged between the second cycloid groove and the second ball fixing hole, so that the cycloid disc does cycloid movement.
In the above technical solution, the output shaft is driven by the cycloid disc, the number of tooth profile ratios of the first cycloid groove and the second cycloid groove is different, the transmission ratio of speed change is also different, and when the positions of the first cycloid groove and the first ball fixing hole as well as the positions of the second cycloid groove and the second ball fixing hole are different, the relative rotational directions of input and output of the first cycloid groove and the second ball fixing hole are also changed, the number of tooth profiles of the first cycloid groove and the second cycloid groove may be smaller than or larger than that of the second cycloid groove, preferably, the difference between the number of first balls and the number of tooth profiles of the first cycloid groove is 1, the difference between the number of second balls and the number of tooth profiles of the second cycloid groove is 1, of course, the number of first balls may be 1-n larger than that of the first cycloid groove, the number of second balls may be 1-n larger than that of the second cycloid groove, and the diameter of the first balls and the diameter of the second balls are not limited, and the diameter of the first ball and the diameter of the second ball can be the same or different.
As a further setting of the utility model, the organism includes shell and apron, and first pendulum line groove or first ball fixed orifices set up on the apron.
Among the above-mentioned technical scheme, the organism is the structure that the looks closed and set up, and easy to assemble like this, detachable fasteners such as shell and apron accessible screw are connected, and the shell also can be a plurality of parts and constitute certainly.
As a further setting of the utility model, first cycloid groove sets up on the apron opposite face relative with the A face of cycloid dish, and first ball fixed orifices sets up on the A face of cycloid dish, second 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 technical proposal, the device comprises a base,
the "-" input and output directions are reversed, which is a low ratio.
As a further setting of the utility model, first cycloid groove sets up on the a face of cycloid dish, and first ball fixed orifices sets up on the relative opposite face of the a face of apron and cycloid dish, second cycloid groove sets up on the relative opposite face of the B face of output shaft and cycloid dish, and second ball fixed orifices sets up on the B face of cycloid dish.
In the technical proposal, the device comprises a base,
the "+" input and output directions are the same, which is a low ratio.
As a further setting of the utility model, first cycloid groove sets up on the a face of cycloid dish, and first ball fixed orifices sets up on the opposite face that the a face of apron is relative with the cycloid dish, second 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 technical proposal, the device comprises a base,
the "-" input and output directions are reversed, which is a high ratio.
As a further setting of the utility model, first cycloid groove sets up on the apron opposite face relative with the a face of cycloid dish, and first ball fixed orifices sets up on the a face of cycloid dish, second cycloid groove sets up on the opposite face that the output shaft is relative with the B face of cycloid dish, and second ball fixed orifices sets up on the B face of cycloid dish.
In the technical proposal, the device comprises a base,
the "+" input and output directions are the same, which is a high ratio.
By adopting the scheme, the high transmission ratio or the low transmission ratio can be realized by changing the arrangement positions of the first ball fixing hole and the first cycloid groove and the arrangement positions of the second ball fixing hole and the second cycloid groove, the problem that the transmission ratio of the existing transmission structure is low is solved, and the size is small.
The present invention will be further described 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 structural sectional view of embodiment 2 of the present invention;
fig. 5 is a structural sectional view of embodiment 3 of the present invention;
fig. 6 is a structural sectional view of embodiment 4 of the present invention.
Detailed Description
The specific embodiment of the utility model is shown in figures 1-6, a differential cycloid 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 B surface of the cycloid disc 1 are respectively provided with a plurality of first balls A1 and second balls B1 which are 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 first cycloid groove 01 and a plurality of first ball fixing holes 02 which are distributed around the circumference are arranged between the A surface of the cycloid disc 1 and the opposite surface which is opposite to the A surface on the installation cavity 21, a second cycloid groove 03 and a plurality of second ball fixing holes 04 which are 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 first cycloid groove 01 and the second cycloid groove 03 are inner cycloid grooves, the number of the first balls A1 is 1-n less than that of the first cycloid grooves 01, the number of the second balls B1 is 1-n less than that of the second cycloid grooves 03, the number of the tooth profiles of the first cycloid grooves 01 is smaller than or larger than that of the second cycloid grooves 03, the first balls A1 are arranged between the first cycloid grooves 01 and the first ball fixing holes 02, and the second balls B1 are arranged between the second cycloid grooves 03 and the second ball fixing holes 04, so that the cycloid disc 1 performs cycloid movement.
Hypocycloids are moving circles inscribed in fixed circles to roll without sliding, and the locus of a fixed point on the circumference of a moving circle is called hypocycloid. The tooth profile on the cycloid groove can also be considered as an epicycloid outwards and a hypocycloid inwards.
The output shaft 4 is driven by the cycloid disc 1, the criss-cross ball bearing 22 is arranged between the output shaft 4 and the machine body 2, and in addition, necessary bearings or rollers, roller retainers, oil seals, sealing rings, connecting screws and the like need to be arranged between the components, which are not described in detail herein, the tooth profile ratios of the first cycloid groove 01 and the second cycloid groove 03 are different, the transmission ratio of the speed change is also different, and when the positions of the first cycloid groove 01 and the first ball fixing hole 02 as well as the positions of the second cycloid groove 03 and the second ball fixing hole 04 are different, the relative rotation directions of the input and the output of the cycloid groove are also changed, the tooth profile number of the first cycloid groove 01 can be smaller than that of the second cycloid groove 03 and also can be larger than that of the second cycloid groove 03, preferably, the difference between the number of the first balls A1 and the tooth profile number of the first cycloid groove 01 is 1, and the difference between the number of the second balls B1 and the tooth profile number of the second cycloid groove 03 is also 1, of course, the number of the first balls A1 may be 1-n more than the number of the tooth profiles of the first cycloid groove 01, and the number of the second balls B1 may be 1-n more than the number of the tooth profiles of the second cycloid groove 03, where the diameters of the first balls A1 and the second balls B1 are not limited, and the diameters of the first balls A1 and the second balls B1 may be the same or different.
The above-mentioned body 2 includes a housing 23 and a cover plate 24, and the first swing groove 01 or the first ball fixing hole 02 is provided on the cover plate 24. The body 2 is of a matched structure, so that the installation is convenient, the shell 23 and the cover plate 24 can be connected through detachable fasteners such as screws, and the shell 23 can be formed by a plurality of parts.
In embodiment 2, as shown in fig. 4, a first cycloid groove 01 is provided on the a-side of the cycloid discs 1, a first ball fixing hole 02 is provided on the opposite surface of the cover plate 24 opposite to the a-side of the cycloid discs 1, a second cycloid groove 03 is provided on the opposite surface of the output shaft 4 opposite to the B-side of the cycloid discs 1, and a second ball fixing hole 04 is provided on the B-side of the cycloid discs 1.
The "+" input and output directions are the same, which is a low ratio.
In embodiment 3, as shown in fig. 5, a first cycloid groove 01 is provided on the a-side of the cycloid discs 1, a first ball fixing hole 02 is provided on the opposite surface of the cover plate 24 opposite to the a-side of the cycloid discs 1, a second cycloid groove 03 is provided on the B-side of the cycloid discs 1, and a second ball fixing hole 04 is provided on the opposite surface of the output shaft 4 opposite to the B-side of the cycloid discs 1.
The "-" input and output directions are reversed, which is a high ratio.
In embodiment 4, as shown in fig. 6, a first cycloid groove 01 is provided on the opposite surface of the cover plate 24 to the a surface of the cycloid disc 1, a first ball fixing hole 02 is provided on the a surface of the cycloid disc 1, a second cycloid groove 03 is provided on the opposite surface of the output shaft 4 to the B surface of the cycloid disc 1, and a second ball fixing hole 04 is provided on the B surface of the cycloid disc 1.
The "+" input and output directions are the same, 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 (6)
1. The utility model provides a differential cycloid speed change gear, 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 the machine body of the speed change device, wherein the cycloid disc is eccentrically driven by an input shaft in the speed change device, a first cycloid groove and a plurality of first ball fixing holes distributed around the circumferential direction are arranged between the surface A of the cycloid disc and the opposite surface of the installation cavity opposite to the surface A, a second cycloid groove and a plurality of second ball fixing holes distributed around the circumferential direction are arranged between the surface B of the cycloid disc and an output shaft of the speed change device, the first cycloid groove and the second cycloid groove are both inner cycloid grooves, the number of first balls is 1-n less than that of the first cycloid grooves, the number of second balls is 1-n less than that of the second cycloid grooves, the number of the tooth profiles of the first cycloid groove is smaller than or larger than that of the second cycloid groove, the first ball is arranged between the first cycloid groove and the first ball fixing hole, and the second ball is arranged between the second cycloid groove and the second ball fixing hole, so that the cycloid disc does cycloid movement.
2. The differential cycloidal transmission according to claim 1 including: the organism includes shell and apron, and first pendulum line groove or first ball fixed orifices set up on the apron.
3. The differential cycloidal transmission according to claim 2 including: the first cycloid groove is formed in the opposite surface, opposite to the surface A, of the cover plate, the first ball fixing hole is formed in the surface A of the cycloid disc, the second cycloid groove is formed in the surface B of the cycloid disc, and the second ball fixing hole is formed in the opposite surface, opposite to the surface B, of the output shaft.
4. The differential cycloidal transmission according to claim 2 including: the first cycloid groove is formed in the surface A of the cycloid disc, the first ball fixing hole is formed in the opposite surface, opposite to the surface A of the cycloid disc, of the cover plate, the second cycloid groove is formed in the opposite surface, opposite to the surface B of the cycloid disc, of the output shaft, and the second ball fixing hole is formed in the surface B of the cycloid disc.
5. The differential cycloidal transmission according to claim 2 including: the first cycloid groove is formed in the surface A of the cycloid disc, the first ball fixing hole is formed in the opposite surface, opposite to the surface A of the cycloid disc, of the cover plate, the second cycloid groove is formed in the surface B of the cycloid disc, and the second ball fixing hole is formed in the opposite surface, opposite to the surface B of the cycloid disc, of the output shaft.
6. The differential cycloidal transmission according to claim 2 including: the first cycloid groove is formed in the opposite surface, opposite to the surface A, of the cover plate, the first ball fixing hole is formed in the surface A of the cycloid disc, the second cycloid groove is formed in the opposite surface, opposite to the surface B, of the output shaft, and the second ball fixing hole is formed in the surface B of the cycloid disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921877387.3U CN211009754U (en) | 2019-11-01 | 2019-11-01 | Differential cycloid speed variator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921877387.3U CN211009754U (en) | 2019-11-01 | 2019-11-01 | Differential cycloid speed variator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211009754U true CN211009754U (en) | 2020-07-14 |
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ID=71507622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921877387.3U Active CN211009754U (en) | 2019-11-01 | 2019-11-01 | Differential cycloid speed variator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211009754U (en) |
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2019
- 2019-11-01 CN CN201921877387.3U patent/CN211009754U/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 cycloid 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 |