CN101956801B - Coaxial speed changer - Google Patents

Coaxial speed changer Download PDF

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Publication number
CN101956801B
CN101956801B CN 200910088804 CN200910088804A CN101956801B CN 101956801 B CN101956801 B CN 101956801B CN 200910088804 CN200910088804 CN 200910088804 CN 200910088804 A CN200910088804 A CN 200910088804A CN 101956801 B CN101956801 B CN 101956801B
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China
Prior art keywords
outer ring
centre circle
curve
interior axle
coaxial
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Expired - Fee Related
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CN 200910088804
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Chinese (zh)
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CN101956801A (en
Inventor
叶齐萌
韩勇
申永胜
肖丽英
赵克研
王欢欢
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GUANGXI WUHONG CONSTRUCTION GROUP Co Ltd
Ye Qimeng
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韩勇
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Abstract

The invention discloses a coaxial speed changer, relates to a speed changer with coaxial input shaft and output shaft, and aims to provide a coaxial speed changer with the advantages of simple structure, small volume, low cost and low possibility of damage. The coaxial speed changer comprises an inner shaft, a central ring, an outer ring and a transmission member, wherein the inner shaft, the central ring and the outer ring are arranged in turn from the interior to the exterior and are coaxial; an outer edge of the inner shaft and an inner edge of the outer ring are curves which are uniformly provided with a plurality of waves; and the transmission member is arranged in a radial groove on the outer ring and can be contacted with the outer edge of the inner shaft and the inner edge of the outer ring. When the inner shaft rotates, the waves on the outer edge of the inner shaft can push the transmission member to slide outwards along the radial direction, and the transmission member slides outwards and can push the waves on the inner edge of the outer ring so as to drive the outer ring to rotate relative to the central ring, and the transmission ratio of the inner shaft to the outer ring relative to the central ring is determined by the wave number of the outer edge of the inner shaft and the inner edge of the outer ring.

Description

Coaxial speed variator
Technical field
The present invention relates to a kind of speed change gear, particularly relate to the coaxial speed variator of a kind of input shaft and output shaft coaxial line.
Background technique
Speed changer is widely used at lathe, vehicle and other to be needed on the machine of speed change, and its main purpose is to change the velocity ratio of output terminal and input end for the needs according to different situations.At present, traditional speed changer mainly is comprised of the different gear of diameter, and these gears are arranged on driving shaft and driven shaft, utilizes the engagement driving between the different gear of these diameters to change the rotating speed of driven shaft, thereby realizes the change of velocity ratio.To have two parallel axles yet this traditional speed changer is minimum, and when needs are than big speed ratio, just need to have in speed changer the larger gear of diameter, therefore the shared space of this speed changer is larger, gear is in the situation that the long-term stressed wearing and tearing that easily cause tooth and cracked, need maintenance or more gear changing frequently, factors causes this traditional speed changer also to have the shortcomings such as cost is higher, the life-span is shorter.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of simple in structure, volume is little, cost is low, non-damageable coaxial speed variator.
Coaxial speed variator of the present invention comprises outer ring, centre circle, interior axle and dirivig member, described outer ring, centre circle and interior axle coaxial line O-O, and the outer rim of described interior axle is evenly to be provided with n aIndividual ripple b 1Curve l 1, described curve l 1Base radius be r a, described outer ring is arranged on outside interior axle, and the inner edge of described outer ring is evenly to be provided with n bIndividual ripple b 2Curve l 2, described curve l 2Base radius be r b, described centre circle is arranged between interior axle and outer ring, evenly is provided with n on described centre circle cIndividual radial groove, described dirivig member are arranged in radial groove and can slide in radial groove, and dirivig member is r along centre circle length radially b-r a, the width of dirivig member is identical with the width of radial groove, described ripple b 1With ripple b 2Wave height a identical, described n cBe n aWith n bAnd or poor absolute value;
When interior axle with axes O-O when circumferentially rotating, ripple b 1Promote dirivig member and radially outwards slide in radial groove, dirivig member promotes ripple b 2The outer ring is also rotated along circumferential with axes O-O, work as n cBe n aWith n bAnd the time, interior axle and outer ring are with respect to the switched in opposite of centre circle; Work as n cBe n aWith n bThe absolute value of difference the time, interior axle is identical with respect to turning to of centre circle with the outer ring.
Coaxial speed variator of the present invention, wherein said curve l 1Polar equation take axle center O as initial point as:
ρ ( t ) = r a + a · ( sin ( n a 2 t ) ) 2 , (t is angular variable); Described curve l 2Polar equation take axle center O as initial point as:
ρ ( t ) = r b + a · ( sin ( n b 2 t ) ) 2 , (t is angular variable).
Coaxial speed variator of the present invention, wherein said curve l 1Polar equation take axle center O as initial point as:
ρ (t)=r a+ asin (n aT)+a ΔCos (2n aT), (t is angular variable); Described curve l 2Polar equation take axle center O as initial point as:
ρ (t)=r b+ asin (n bT)+a ΔCos (2n bT), (t is angular variable); Wherein said a ΔLess than 1/4 of a.
Coaxial speed variator of the present invention, wherein said dirivig member are large roller, and the diameter of described large roller is r b-r a
Coaxial speed variator of the present invention, wherein said dirivig member comprise push rod and two little rollers, and described two little rollers are separately positioned on the two ends of push rod, and the relative push rod of little roller is rotatable.
Coaxial speed variator of the present invention, wherein said centre circle is provided with some fixed vias, the left and right both ends of the surface of described centre circle are respectively equipped with cover plate, and described cover plate is provided with the through hole corresponding with fixed via, in described fixed via and through hole, connecting bolt is housed centre circle is fixedly connected with cover plate.。
Coaxial speed variator of the present invention, the exterior edge face of wherein said one of them cover plate is provided with base.
coaxial speed variator difference from prior art of the present invention is that coaxial speed variator of the present invention is mainly by interior axle, centre circle, outer ring and dirivig member consist of, the outer rim of interior axle and the inner edge of outer ring are all the curve of even some quantity ripples that distribute, dirivig member is arranged in radial groove on the outer ring, dirivig member can contact with the outer rim of interior axle and the inner edge of outer ring, when interior axle rotates, the ripple of interior axle outer rim just can promote dirivig member and radially outwards slide, dirivig member can promote the ripple of outer ring inner edge when outwards sliding, thereby driving the outer ring rotates relative to centre circle, and interior axle and outer ring are determined with respect to the velocity ratio of the centre circle wave number by interior axle outer rim and outer ring inner edge, the input shaft of coaxial speed variator of the present invention and output shaft coaxial line, and the diameter of velocity ratio and interior axle and outer ring is irrelevant, therefore the speed changer that the volume ratio of coaxial speed variator of the present invention is traditional is little, and do not need machining gears, the cost that also makes simple in structure decreases.
In in coaxial speed variator of the present invention, the curve of axle outer rim and the curve of outer ring inner edge are made of above-mentioned specific polar equation, are the best curves of performance at aspects such as mechanical efficiency, noise, vibrations; Dirivig member can be both large roller, can be also the structure with push rod, made the generation rolling friction of dirivig member and interior axle and outer ring, had improved transmission efficiency, reduced the wearing and tearing of energy loss and part; Being provided with through hole on centre circle and cover plate is for the ease of carrying out spacing to centre circle, when centre circle is fixed when motionless, coaxial speed variator of the present invention just can be used as speed reducer and uses, and when centre circle can rotate, coaxial speed variator of the present invention just can be used as plain bearing or differential mechanism uses.
Below in conjunction with accompanying drawing, coaxial speed variator of the present invention is described further.
Description of drawings
Fig. 1 is the plan view of coaxial speed variator the first mode of execution of the present invention;
Fig. 2 is A-A direction sectional view in Fig. 1;
Fig. 3 is the plan view of coaxial speed variator the second mode of execution of the present invention;
Fig. 4 is B-B direction sectional view in Fig. 3.
Embodiment
As depicted in figs. 1 and 2, the coaxial speed variator of the first mode of execution comprises outer ring 1, centre circle 2, interior axle 3 and dirivig member, outer ring 1, centre circle 2 and interior axle 3 coaxial line O-O, and the outer rim of interior axle 3 is evenly to be provided with n aIndividual ripple b 1Curve l 1, n aBe 7, ripple b 1Wave height be a, curve l 1Base radius be r a, curve l 1Polar equation take axle center O as initial point as: ρ ( t ) = r a + a · ( sin ( n a 2 t ) ) 2 , (t is angular variable); Outer ring 1 is arranged on interior axle 3 outsides, and the inner edge of outer ring 1 is evenly to be provided with n bIndividual ripple b 2Curve l 2, n bBe 3, ripple b 2Wave height be all a, curve l 2Base radius be r b, curve l 2Polar equation take axle center O as initial point as: ρ ( t ) = r b + a · ( sin ( n b 2 t ) ) 2 , (t is angular variable); Centre circle 2 is arranged between interior axle 3 and outer ring 1, evenly is provided with n on centre circle 2 cIndividual radial groove 4, dirivig member are large roller 5, and the diameter of large roller 5 is r b-r a Large roller 5 is arranged in radial groove 4 and can be in the interior slip of radial groove 4, centre circle 2 is provided with some fixed vias 8, the left and right both ends of the surface of centre circle 2 are respectively equipped with cover plate 9,9 ', cover plate 9,9 ' is provided with the through hole corresponding with fixed via 8 10, and the exterior edge face of one of them cover plate 9 is provided with base 11.
N wherein cBe n aWith n bAnd, when interior axle 3 with axes O-O when circumferentially rotating, ripple b 1Promote dirivig member and radially outwards slide in radial groove 4, dirivig member promotes ripple b 2 Outer ring 1 is also rotated along circumferential with axes O-O, when centre circle 2 maintains static, the velocity ratio of outer ring 1 and interior axle 3 i = n b n a = 3 7 , The switched in opposite of interior axle 3 and outer ring 1.
N wherein cCan also be n aWith n bThe absolute value of difference, in axle 3 identical with turning to of outer ring 1, velocity ratio i = n b n a = 3 7 .
As shown in Figure 3 and Figure 4, the difference of the coaxial speed variator of the second mode of execution and the first mode of execution is that dirivig member comprises push rod 6 and two little rollers 7, two little rollers 7 are separately positioned on the two ends of push rod 6, and the relative push rod 6 of little roller 7 is rotatable, two little rollers 7 can contact with interior axle outer rim and outer ring inner edge respectively, and the length that whole dirivig member makes progress in centre circle 2 footpaths is r b-r a
The velocity ratio of coaxial speed variator of the present invention depends on ripple b 1And b 2Quantity n aAnd n bRatio, determine and can't help the diameter of outer ring 1 and interior axle 3, therefore in the situation that need big speed ratio also can accomplish very little volume; And, interior axle 3 is connected with the input shaft of power system fixedly the time when centre circle 2, outer ring 1 is connected with output shaft, coaxial speed variator of the present invention can be used as speed reducer and uses; , outer ring 1 is connected with the input shaft of power system fixedly the time when centre circle 2, interior axle 3 is connected with output shaft, coaxial speed variator of the present invention just can be used as booster engine and uses; And when outer ring 1, centre circle 2 and interior axle 3 all not fixedly the time, outer ring 1, interior axle 3 and centre circle 2 can rotate simultaneously with certain rule, and coaxial speed variator of the present invention also can be used as plain bearing or differential mechanism uses.
Curve l 1And l 2Realize goal of the invention except the curvilinear equation defined in can adopting above two kinds of mode of executions, can also adopt other curvilinear equations to realize goal of the invention, for example: curve l 1Polar equation take axle center O as initial point as:
ρ (t)=r a+ asin (n aT)+a ΔCos (2n aT), (t is angular variable), curve l 2Polar equation take axle center O as initial point as:
ρ (t)=r b+ asin (n bT)+a ΔCos (2n bT), (t is angular variable), wherein a Δ Be 1/5 of a; Work as a ΔWhen being zero, curve l 1Polar equation take axle center O as initial point is ρ (t)=r a+ asin (n aT), (t is angular variable), curve l 2Polar equation take axle center O as initial point is ρ (t)=r b+ asin (n bT), (t is angular variable); The above-mentioned two represented curve l of suite line equation 1And l 2Can realize equally goal of the invention and the effect of coaxial speed variator of the present invention, disclosed curve during just its performance at aspects such as mechanical efficiency, noise, vibrations is omited inferior to front two kinds of mode of executions.
Above embodiment is described the preferred embodiment of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that those of ordinary skills make technological scheme of the present invention all should fall in the definite protection domain of claims of the present invention.

Claims (6)

1. coaxial speed variator is characterized in that: comprise outer ring (1), centre circle (2), interior axle (3) and dirivig member, and described outer ring (1), centre circle (2) and interior axle (3) coaxial line O-O, the outer rim of described interior axle (3) is evenly to be provided with n aIndividual ripple b 1Curve l 1, described curve l 1Base radius be r a, described outer ring (1) is arranged on outside interior axle (3), and the inner edge of described outer ring (1) is evenly to be provided with n bIndividual ripple b 2Curve l 2, described curve l 2Base radius be r b, described centre circle (2) is arranged between interior axle (3) and outer ring (1), and described centre circle evenly is provided with n on (2) cIndividual radial groove (4), described dirivig member are arranged in radial groove (4) and can slide in radial groove (4), and dirivig member is r along centre circle (2) length radially b-r a, the width of dirivig member is identical with the width of radial groove (4), described ripple b 1With ripple b 2Wave height a identical, described n cBe n aWith n bAnd or poor absolute value;
Described curve l 1Polar equation take axle center O as initial point as:
ρ ( t ) = r a + a · ( sin ( n a 2 t ) ) 2 , T is angular variable,
Described curve l 2Polar equation take axle center O as initial point as:
ρ ( t ) = r b + a · ( sin ( n b 2 t ) ) 2 , T is angular variable;
Perhaps, described curve l 1Polar equation take axle center O as initial point as:
ρ (t)=r a+ asin (n aT)+a ΔCos (2n aT), t is angular variable,
Described curve l 2Polar equation take axle center O as initial point as:
ρ (t)=r b+ asin (n bT)+a ΔCos (2n bT), t is angular variable;
Wherein said a ΔLess than 1/4 of a;
When interior axle (3) with axes O-O when circumferentially rotating, ripple b1 promotes dirivig member and radially outwards slides in radial groove (4), dirivig member promotes ripple b 2Outer ring (1) is also rotated along circumferential with axes O-O, work as n cBe n aWith n bAnd the time, interior axle (3) and outer ring (1) are with respect to the switched in opposite of centre circle (2); Work as n cBe n aWith n bThe absolute value of difference the time, interior axle (3) is identical with respect to turning to of centre circle (2) with outer ring (1).
2. coaxial speed variator according to claim 1, it is characterized in that: described dirivig member is large roller (5), and the diameter of described large roller (5) is r b-r a
3. coaxial speed variator according to claim 1, it is characterized in that: described dirivig member comprises push rod (6) and two little rollers (7), described two little rollers (7) are separately positioned on the two ends of push rod (6), and the relative push rod (6) of little roller (7) is rotatable.
4. coaxial speed variator according to claim 2, it is characterized in that: described centre circle (2) is provided with some fixed vias (8), the left and right both ends of the surface of described centre circle (2) are respectively equipped with cover plate (9,9 '), described cover plate (9,9 ') is provided with the through hole (10) corresponding with fixed via (8), in described fixed via (8) and through hole (10), connecting bolt is housed centre circle (2) is fixedly connected with cover plate (9,9 ').
5. coaxial speed variator according to claim 3, it is characterized in that: described centre circle (2) is provided with some fixed vias (8), the left and right both ends of the surface of described centre circle (2) are respectively equipped with cover plate (9,9 '), described cover plate (9,9 ') is provided with the through hole (10) corresponding with fixed via (8), in described fixed via (8) and through hole (10), connecting bolt is housed centre circle (2) is fixedly connected with cover plate (9,9 ').
6. according to claim 4 or 5 described coaxial speed variators, it is characterized in that: the exterior edge face of described one of them cover plate (9) is provided with base (11).
CN 200910088804 2009-07-16 2009-07-16 Coaxial speed changer Expired - Fee Related CN101956801B (en)

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Application Number Priority Date Filing Date Title
CN 200910088804 CN101956801B (en) 2009-07-16 2009-07-16 Coaxial speed changer

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Application Number Priority Date Filing Date Title
CN 200910088804 CN101956801B (en) 2009-07-16 2009-07-16 Coaxial speed changer

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CN101956801A CN101956801A (en) 2011-01-26
CN101956801B true CN101956801B (en) 2013-06-12

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103447996A (en) * 2013-09-22 2013-12-18 广西五鸿建设集团有限公司 Labor-saving wrench

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1166577A (en) * 1995-06-04 1997-12-03 叶齐萌 Non-circular arc varying-speed bearing
CN1375647A (en) * 1998-05-27 2002-10-23 叶齐萌 Double-cam multiple-pushover transmission bearing
CN201137685Y (en) * 2007-12-29 2008-10-22 东莞市智通机电有限公司 Multishock cylinder roller speed changing bearing
CN201461889U (en) * 2009-07-16 2010-05-12 韩勇 Coaxial speed changer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1166577A (en) * 1995-06-04 1997-12-03 叶齐萌 Non-circular arc varying-speed bearing
CN1375647A (en) * 1998-05-27 2002-10-23 叶齐萌 Double-cam multiple-pushover transmission bearing
CN201137685Y (en) * 2007-12-29 2008-10-22 东莞市智通机电有限公司 Multishock cylinder roller speed changing bearing
CN201461889U (en) * 2009-07-16 2010-05-12 韩勇 Coaxial speed changer

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