CN107143622B - Speed reducer cycloid transmission mechanism based on drum-shaped ball piece - Google Patents
Speed reducer cycloid transmission mechanism based on drum-shaped ball piece Download PDFInfo
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- CN107143622B CN107143622B CN201710505307.0A CN201710505307A CN107143622B CN 107143622 B CN107143622 B CN 107143622B CN 201710505307 A CN201710505307 A CN 201710505307A CN 107143622 B CN107143622 B CN 107143622B
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- drum
- shaped ball
- cycloid
- ball part
- shaped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a cycloid transmission mechanism of a speed reducer based on drum-shaped ball pieces, which comprises a cycloid disc, transmission pieces and an output disc, wherein the transmission pieces are drum-shaped ball pieces, the drum-shaped ball pieces are two rotating bodies which are symmetrically inscribed on the long sides of a rectangle and are formed by intersecting and encircling an arc line with the short sides of the rectangle in radius R along the longitudinal center line of the rotating bodies, drum-shaped ball piece fixing holes are uniformly distributed on the disc surface of one side of the output disc in a circumferential manner, the number of the drum-shaped ball pieces is consistent with that of the drum-shaped ball pieces, the drum-shaped ball piece fixing holes are matched with the outline shape of one end of the drum-shaped ball pieces along the longitudinal center line direction of the drum-shaped ball pieces, cycloid track grooves are formed in the disc surface of one side of the cycloid disc, the cycloid track grooves comprise a plurality of drum-shaped ball pieces movable caulking grooves which are uniformly distributed at intervals, and the other side of the drum-shaped ball pieces along the longitudinal center line direction of the drum-shaped ball pieces are in sliding movable connection with the cycloid track grooves of the drum-shaped ball pieces. The invention has the advantages of high transmission power and small abrasion to cycloid grooves.
Description
Technical Field
The invention relates to a component of a speed reducer, in particular to a cycloidal transmission mechanism of the speed reducer based on a drum-shaped ball part.
Background
The cycloidal pin gear speed reducer gradually replaces a gear speed reducer and a worm speed reducer due to the advantages of large speed reduction ratio, small size and the like, and is widely applied to speed and torque conversion equipment as a driving or speed reduction device.
The cycloidal pin gear speed reducer is a novel transmission device which adopts a planetary transmission principle and adopts cycloidal pin gear meshing, and a speed reduction transmission part of the cycloidal pin gear speed reducer adopts arc teeth to contact with a roller pin cylindrical surface, but the motion process of a power transmission contact surface of the speed reducer is in a high-load motion mode, so that the abrasion is easy to cause. The cycloidal reducer has the advantages of complex structure, high processing precision, certain process clearance in the design and installation processes, unstable rotation during working, large noise and low rotation efficiency, so that a novel cycloidal reducer is necessary to solve the problems.
In the prior art, compared with the traditional cycloidal pin gear speed reducer, the cycloidal ball speed reducer based on the transmission of the spherical balls has great progress in the aspects of transmission precision and the like, and the cycloidal pin gear speed reducer is referred to as a follow-up driving speed reducer in China patent publication No. CN 106352043A of the applicant.
However, the following problems still exist in the following driving speed reducer based on the transmission scheme of the spherical balls:
1. the spherical transmission torque reduces transmission power;
2. the mechanical analysis shows that: the transmission of forces between the ball and the cycloidal groove is mainly concentrated at the edges of the groove and the ball moves in the groove, with the result that the wear at the groove edges and the wear of the ball are large.
3. The cycloid groove is a place where the speed reducer and important core technology thereof are concentrated, and if the cycloid groove is worn out too early, the noise of the speed reducer is increased, the transmission power is reduced, and the service life is shortened.
Disclosure of Invention
The invention aims to solve the technical problem of providing a cycloidal transmission mechanism of a speed reducer based on a drum-shaped ball part, which has high transmission power and small abrasion to cycloidal track grooves.
The transmission part is a drum-shaped ball part, the drum-shaped ball part is a rotating body which is formed by two left-right symmetrical inner cutting edges of a rectangle and a graph formed by intersecting an arc line with a radius R and a short edge of the rectangle along the longitudinal center line of the drum-shaped ball part, drum-shaped ball part fixing holes which are uniformly distributed along the circumference are arranged on a disc surface on one side of the output disc, the number of the drum-shaped ball parts is consistent with that of the drum-shaped ball part fixing holes, the drum-shaped ball part fixing holes are matched with that of the outline shape of one end of the drum-shaped ball part along the longitudinal center line of the drum-shaped ball part, cycloid track grooves are formed on the disc surface on one side of the cycloid disc, the cycloid track grooves comprise a plurality of drum-shaped ball part movable embedding grooves which are uniformly distributed at intervals, the drum-shaped ball part movable embedding grooves are matched with the outline shape of one end of the drum-shaped ball part along the longitudinal center line direction of the drum-shaped ball part, and the number of the drum-shaped ball part movable embedding grooves is smaller than Z1 of the drum-shaped ball part;
one side of the drum-shaped ball part along the longitudinal central line direction is embedded and fixed in the drum-shaped ball part fixing hole, and the other side of the drum-shaped ball part along the longitudinal central line direction is movably connected with the cycloid track groove of the cycloid disc in a sliding way.
Further provided are the number of teeth Z1 of the ball movable caulking groove and the number of drum-shaped ball pieces Z2 satisfying the following equation: z2=z1+1.
Further provided is the maximum diameter D, the radius of curvature R, of said drum ball, said D <2R.
Further provided is a drum ball height H, said H <2R.
Further provided is that the maximum diameter D of the drum-shaped ball member, the arc radius R satisfies: 0.2< d/(2*R) <0.8.
The movable caulking groove of the drum-shaped ball part is further provided with a shape corresponding to the shape of half drum-shaped ball part obtained by half-cutting the drum-shaped ball part at the maximum diameter.
The novel mechanism and the advantages of the invention are that the drum-shaped ball piece is adopted to replace the round ball, the two sides of the drum-shaped ball piece along the longitudinal center line direction are respectively in forced fit with the fixing hole of the drum-shaped ball piece and the cycloid track groove, compared with the spherical ball, the forced contact area of the drum-shaped ball piece is larger, therefore, the drum-shaped ball piece can adapt to higher transmission power, in addition, the structure improves the contact area of the drum-shaped ball piece and the cycloid track groove in the sliding and rotating process, so that the transmission force is not concentrated at the edge of the cycloid track groove in the mechanical aspect, thereby reducing the abrasion, prolonging the service life and effectively reducing the noise.
The invention is further described below with reference to the drawings and detailed description.
Drawings
FIG. 1 is a perspective view of an embodiment of the present invention;
fig. 2 is a schematic view of the longitudinal section of a drum-type ball member.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the invention and are not intended to limit the scope of the invention.
As shown in fig. 1 to 2, in the example of the present invention, a cycloidal transmission mechanism of a speed reducer based on a drum-type ball member includes a cycloid disc 1, a transmission member and an output disc 3, wherein an input shaft mounting hole 11 is provided at the center of the cycloid disc 1, an output shaft mounting hole 31 is provided in the output disc 3, the transmission member is a drum-type ball member 2, the drum-type ball member 2 is a rotating body obtained by rotating two curves 22 which are symmetrically inscribed on the long side of a rectangle 21 and have a radius R and intersect with a short side 23 of the rectangle along the longitudinal center line thereof for one circle, the profile of the longitudinal section of the drum-type ball member 2 is shown in fig. 2, the maximum column diameter of the drum-type ball member is D, the radius of the arc is R and the column height H, the D <2R, H <2R, and 0.2< D/(2R) <0.8 are suitable.
The drum-shaped ball member 2 of the present invention is similar to the conventional waist drum shape in overall appearance so as to facilitate understanding of the shape thereof, thereby understanding the effects of reducing wear thereof, improving the service life thereof, and effectively reducing noise.
In addition, the disc surface on one side of the output disc 3 in this example is provided with drum-shaped ball fixing holes 32 uniformly distributed on the circumference, the number of drum-shaped ball parts 2 is consistent with that of the drum-shaped ball parts fixing holes 32, the roll fixing holes 32 are matched with the size of the outward expansion shape of one end of the drum-shaped ball parts 2 along the longitudinal central line direction, the disc surface of the wobble plate 1 corresponding to one side of the output disc 3 is provided with cycloid track grooves 12, the cover cycloid track grooves 12 comprise a plurality of drum-shaped ball part movable embedding grooves 121 uniformly distributed at intervals, the drum-shaped ball part movable embedding grooves 121 are matched with the size of the outline shape of one section of the drum-shaped ball parts 2 along the longitudinal central line direction, and the number Z1 of the drum-shaped ball part movable embedding grooves is smaller than the number Z2 of the drum-shaped ball parts, so as to satisfy the following equation: z2=z1+1; specifically, taking a reduction ratio of 1/40 as an example, the number of the drum-shaped ball pieces 2 is 40, the number of the movable caulking grooves 32 of the drum-shaped ball pieces is 39, and the other side of the drum-shaped ball pieces 2 along the longitudinal center line direction of the drum-shaped ball pieces is slidably and movably connected with the cycloid track groove 12 of the cycloid disc.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (5)
1. The utility model provides a speed reducer cycloid drive mechanism based on drum type ball spare, includes the cycloid dish, driving medium and output dish, the center of cycloid dish be provided with the input shaft mounting hole, be provided with output shaft mounting hole in the output dish, its characterized in that: the transmission part is a drum-shaped ball part, the drum-shaped ball part is a rotating body which is formed by two curves which are symmetrically inscribed on the long side of a rectangle and have the radius R and are intersected with the short side of the rectangle to form a pattern which is rotated for one circle along the longitudinal center line of the rotating body, drum-shaped ball part fixing holes which are uniformly distributed circumferentially are arranged on one side disc surface of the output disc, the number of the drum-shaped ball parts is consistent with that of the drum-shaped ball part fixing holes, the drum-shaped ball part fixing holes are matched with that of the outline shape of one end of the drum-shaped ball part along the longitudinal center line direction, cycloid track grooves are formed on the disc surface of one side of the cycloid disc, the cycloid track grooves comprise a plurality of drum-shaped ball part movable embedding grooves which are uniformly distributed at intervals, and the outline shape of one end of the drum-shaped ball part along the longitudinal center line direction of the drum-shaped ball part are matched, and the number Z1 of the drum-shaped ball part movable embedding grooves is smaller than the number Z2 of the drum-shaped ball parts;
one side of the drum-shaped ball part along the longitudinal central line direction is embedded and fixed in the drum-shaped ball part fixing hole, and the other side of the drum-shaped ball part along the longitudinal central line direction is movably connected with the cycloid track groove of the cycloid disc in a sliding manner;
the movable caulking groove of the drum-shaped ball part has a shape corresponding to the shape of half drum-shaped ball part obtained by half-cutting the drum-shaped ball part at the maximum diameter.
2. A drum ball-based speed reducer cycloidal transmission according to claim 1, characterized in that: the number of teeth Z1 of the ball movable caulking groove and the number of drum-shaped ball pieces Z2 satisfy the following equation: z2=z1+1.
3. A drum ball based speed reducer cycloidal transmission according to claim 1 or 2, characterized in that: the maximum diameter D of the drum ball member, the arc radius R, and D <2R.
4. A drum ball based speed reducer cycloidal transmission according to claim 3 wherein: drum ball height H, H <2R.
5. A drum ball based speed reducer cycloidal transmission according to claim 3 wherein: maximum diameter D of drum ball spare, pitch arc radius R satisfy: 0.2< D/(2*R) <0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710505307.0A CN107143622B (en) | 2017-06-28 | 2017-06-28 | Speed reducer cycloid transmission mechanism based on drum-shaped ball piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710505307.0A CN107143622B (en) | 2017-06-28 | 2017-06-28 | Speed reducer cycloid transmission mechanism based on drum-shaped ball piece |
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| Publication Number | Publication Date |
|---|---|
| CN107143622A CN107143622A (en) | 2017-09-08 |
| CN107143622B true CN107143622B (en) | 2023-08-01 |
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| CN201710505307.0A Active CN107143622B (en) | 2017-06-28 | 2017-06-28 | Speed reducer cycloid transmission mechanism based on drum-shaped ball piece |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0596598U (en) * | 1992-05-29 | 1993-12-27 | 株式会社椿本チエイン | Ball type two-stage speed reducer |
| TW200918790A (en) * | 2007-10-23 | 2009-05-01 | Univ Nat Formosa | Roller drives with two-tooth difference and its fabrication method |
| JP2010132162A (en) * | 2008-12-05 | 2010-06-17 | Nsk Ltd | Rack assist type electric power steering device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0926011A (en) * | 1995-07-12 | 1997-01-28 | Kamo Seiko Kk | Rolling ball type transmission |
| CN104819277B (en) * | 2015-02-25 | 2017-09-15 | 佛山市诺尔贝机器人技术有限公司 | A kind of power input anti-self-rotating mechanism of many bent axle cycloid speed reducers |
| CN106523599B (en) * | 2016-12-20 | 2019-02-01 | 同济大学 | The correction method and Cycloidal pin-wheel drive device of Cycloidal pin-wheel drive device |
| CN206929285U (en) * | 2017-06-28 | 2018-01-26 | 海尚集团有限公司 | Reductor cyclo drive mechanism based on drum type ball members |
-
2017
- 2017-06-28 CN CN201710505307.0A patent/CN107143622B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0596598U (en) * | 1992-05-29 | 1993-12-27 | 株式会社椿本チエイン | Ball type two-stage speed reducer |
| TW200918790A (en) * | 2007-10-23 | 2009-05-01 | Univ Nat Formosa | Roller drives with two-tooth difference and its fabrication method |
| JP2010132162A (en) * | 2008-12-05 | 2010-06-17 | Nsk Ltd | Rack assist type electric power steering device |
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| CN107143622A (en) | 2017-09-08 |
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