AU2021100447A4 - The innovative transmission device relates to a coaxial transmission in which an input shaft and an output shaft are coaxial. The aim of the invention is to provide a coaxial transmission which is simple in structure, small in size, low in cost and will have a long operational life without damage. - Google Patents

The innovative transmission device relates to a coaxial transmission in which an input shaft and an output shaft are coaxial. The aim of the invention is to provide a coaxial transmission which is simple in structure, small in size, low in cost and will have a long operational life without damage. Download PDF

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AU2021100447A4
AU2021100447A4 AU2021100447A AU2021100447A AU2021100447A4 AU 2021100447 A4 AU2021100447 A4 AU 2021100447A4 AU 2021100447 A AU2021100447 A AU 2021100447A AU 2021100447 A AU2021100447 A AU 2021100447A AU 2021100447 A4 AU2021100447 A4 AU 2021100447A4
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ring
transmission
shaft
coaxial
curve
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AU2021100447A
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Yong Han
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Han Yong Mr
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Han Yong Mr
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/04Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying rotary motion
    • F16H25/06Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying rotary motion with intermediate members guided along tracks on both rotary members

Abstract

A coaxial transmission of the innovative device which includes an outer ring (1), a middle ring (2), an inner shaft (3) and a transmission member, the outer ring (1), the middle ring (2) and the inner shaft (3) are coaxial 0-0, and the outer edge of the inner shaft (3) is evenly provided with nawaves bi curve 11. The base circle radius of the curve 11 is ra, the outer ring (1) is arranged outside the inner shaft (3), the inner edge of the outer ring (1) is a curve 12with nbwaves b2uniform, and the radius of the base circle of the curve 12 is rb. The middle ring (2) is arranged between the inner shaft (3) and the outer ring (1). The nc radial grooves (4) are evenly arranged on the middle ring (2), and the transmission member is arranged in the radial groove (4) and can slide in the radial groove (4). The length of the transmission member along the radial direction of the middle ring (2) is r-ra and the width of the transmission member is the same as the width of the radial groove (4). The wave height a of the wave bi and the wave b2are the same. The absolute value of the nc is the sum or difference of na and nb. When the inner shaft (3) rotates on the axis 0-0 in the circumferential direction, the wave bi pushes the transmission member to slide radially outward in the radial groove (4). The transmission member pushes the wave b2 tomake the outer ring (1) rotate in the circumferential direction on the axis 0-0, when nc is the sum of na and nb, the rotation of the inner shaft (3) and outer ring (1) relative to the middle ring (2) is opposite; when nc is the absolute value of the difference between na and nb, the rotation of the inner shaft (3) and outer ring (1) relative to the middle ring (2) is the same. Drawings Kb2 5 2 Obi 3 r O O Drawing 1 9' 2 10 Drawing 2 Page 7 of 10

Description

Drawings
Kb2
5
2 Obi 3
r O O
Drawing 1
9'
2
10
Drawing 2
Page 7 of 10
Description
Coaxial transmission
Technical field
[001] The innovative device relates to a transmission device, with an input shaft and an output shaft that are positioned coaxially.
Background technique
[002] The transmission device is widely used in machine tools, vehicles and other machines that require variable speed. Its main purpose is to change the transmission ratio between the output part and the input part according to the needs of different situations. At present, the traditional transmission is mainly composed of gears with different diameters. These gears are installed on the driving shaft and the driven shaft, and the meshing transmission between these gears with different diameters is used to change the speed of the driven shaft to achieve the transmission ratio. However, this traditional transmission must have at least two parallel shafts, and when a larger transmission ratio is required, a gear with a larger diameter is required in the transmission. Therefore, the transmission occupies a large space and the gears are under conditions of force. Wear and fracture of the teeth happens easily, and frequent maintenance or replacement of gears is required. Many factors cause the traditional transmissions to have disadvantages, such as high cost and short life.
Innovative content
[003] The traditional transmission technical problems solved by the Innovative device is to provide a coaxial transmission with simple structure, small size, low cost and is not easily damaged.
[004] The coaxial transmission of the innovative device includes an outer ring, a middle ring, an inner shaft and a transmission member. The outer ring, the middle ring and the inner shaft are coaxial 0-0, and the outer edge of the inner shaft is evenly provided with na waves b 1 Curve 11. The base circle radius of the curve 11 is ra, the outer ring is arranged outside the inner shaft, the inner edge of the outer ring is a curve 12 with nb waves b 2 uniformly, and the radius of the base circle of the curve 12 is rb. The middle ring is arranged between the inner shaft and the outer ring. The ne radial grooves are evenly arranged on the middle ring, and the transmission member is arranged in the radial groove and can slide in the radial groove. The length of the transmission member along the radial direction of the middle ring is rb-ra and the width of the transmission member is the same as the width of the radial groove. The Page 1 of 10 wave height a of the wave b1 and the wave b 2 are the same, The absolute value of the nc is the sum or difference of na and nb.
[005] When the inner shaft rotates on the axis 0-0 in the circumferential direction, the wave bi pushes the transmission member to slide radially outward in the radial groove. The transmission member pushes the wave b 2 to make the outer ring rotate in the circumferential direction on the axis 0-0, when ncis the sum of na and nb, the rotation of the inner shaft and outer ring relative to the middle ring is opposite; when nc is the absolute value of the difference between na and nb, the rotation of the inner shaft and outer ring relative to the middle ring is the same.
[006] In the coaxial transmission of the innovative device, the polar coordinate equation of the curve 11with the axis 0 as the origin is:
p(t)=r a(sin( t))2
[007] a 2 (t is the angle variable);
[008] The polar coordinate equation of the curve 12 with the axis 0 as the origin is:
p(t) = rb+a.-(sin"n )2
[009] (t is the angle variable).
[010] In the coaxial transmission of the innovative device, the polar coordinate equation of the curve 11 with the axis 0 as the origin is:
[011] (t)=ra+asin(nat)+a'cos(2nat), (t is the angle variable);
[012] The polar coordinate equation of the curve 12 with the axis 0 as the origin is:
[013] P (t)=r+a~sin(nbt)+aA~cos(2nt), (t is the angle variable);
[014] Wherein said aA is less than 1/4 of a.
[015]In the coaxial transmission of the innovative device, the transmission member is a large roller, and the diameter of the large roller is r-ra.
[016] The coaxial transmission of the innovative device, wherein the transmission member includes a push rod and two small rollers, the two small rollers are respectively arranged at two ends of the push rod, and the small rollers are rotatable relative to the push rod.
[017] In the coaxial transmission of the innovative device, the middle ring is provided with a number of fixed holes, the left and right parts of the middle ring are
Page 2 of 10 respectively provided with cover plates, and the cover plates also have fixed through holds which corresponding fixed holes, the fixing holes and the through holes are equipped with connecting bolts to fix the middle ring and the cover plate.
[018] In the coaxial transmission of the innovative device, the outer end surface of one of the cover plates is provided with a base.
[019]The difference between the coaxial transmission of the innovative device and
the current device is that the innovative transmission device comprises an inner shaft, a middle ring, an outer ring and a transmission member, wherein the inner shaft, the middle ring and the outer ring are sequentially arranged from inside to outside and are coaxially centered. The outeredge ofthe inner shaft and the inneredge ofthe outer ringare curves of uniformly distributed waves, and the transmission member is arranged in a radial groove on the outer ring. The transmission member will be in contact with the outer edge of the inner shaft and the inner edge of the outer ring. When the inner shaft rotates, the wave at the outer edge of the inner shaft pushes the transmission member to slide outward in a radial direction. The transmission member pushes the wave at the inner edge of the outer ring while sliding outward, thus driving the outer ring to rotate relative to the middle ring. The transmission ratio between the inner shaft and the outer ring relative to the middle ring is determined by the wave numbers at the outer edge of the inner shaft and the inner edge of the outer ring. the input shaft and the output shaft of the coaxial transmission of the innovative device are coaxial, and the transmission ratio has nothing to do with the diameter of the inner shaft and the outer ring. Therefore, the size of the innovative device is smaller than the traditional transmission, and there is no need for the gears to process. The simple structure also reduces the cost.
[020]The curve of the outer edge of the inner shaft and the inner edge of the outer ring in the coaxial transmission of the innovative device are composed of the above-mentioned specific polar coordinate equations, and are the curves with the best performance in terms of mechanical efficiency, noise, vibration. Transmission components can be a large roller or a structure with a push rod, which makes the transmission member and the inner shaft and outer ring produce rolling friction, improves the transmission efficiency, reduces energy loss and parts wear. On the middle ring and cover plate, the through holes are provided to facilitate the positioning of the middle ring. When the middle ring is fixed, the coaxial transmission of the innovative device can be used as a reducer. When the middle ring rotates, the coaxial transmission of the innovative device can be used as ordinary bearings, or differentials are used.
Page 3 of 10
[021] The coaxial transmission of the present invention will be further described below in conjunction with the drawings.
Description of the drawings
[022] Figure 1 is a front view of the first embodiment of the coaxial transmission of the present invention;
[023] Figure 2 is a cross-sectional view in the direction of A-A in Figure 1;
[024] Figure 3 is a front view of the second embodiment of the coaxial transmission of the present invention;
[025] Fig. 4 is a cross-sectional view in the direction of B-B in Fig. 3.
Detailed descriptions
[026] As shown in figures 1 and 2, the coaxial transmission of the first embodiment includes an outer ring 1, a middle ring 2, an inner shaft 3 and a transmission member. The outer ring 1, the middle ring 2 and the inner shaft 3 are coaxial 0-0, and the inner of the outer edge of axis 3 is a curve 11 with evenly set nawaves bi, nais 7, the wave height of wave b 1 is a, the base circle radius of curve li is ra, and the polar coordinate equation of curve 11 with axis 0 as the origin is :
p)= r .(t is the angle variable); the outer ring 1 is set outside the inner shaft 3, the inner edge of the outer ring 1 is a curve 12 with nb waves b 2 uniformly, n is 3, the wave height of wave b 2 is the same as a, and the curve 12 of the radius of the base circle is rb, and the polar coordinate equati (t)= +a-(sin("-t))2 the axis 0 as the origin is: (t is the angular variable); the middle ring 2 is set between the inner shaft 3 and the outer ring 1, and the middle ring 2 is evenly set nc radial grooves 4, the transmission member is a large roller 5, the diameter of the large roller 5 is rb-ra, the large roller 5 is arranged in the radial groove 4 and can slide in the radial groove 4, the middle ring 2 A number of fixing through holes 8 are provided on the middle ring 2, and cover plates 9, 9'are respectively provided on the left and right end faces of the middle ring 2, and the cover plates 9, 9'are provided with through holes 10 corresponding to the fixing through holes 8. A base 11is provided on the outer end surface of a cover 9.
[027] Where nc is the sum of na and nb. When the inner shaft 3 rotates in the circumferential direction on the axis 0-0, the wave b1 pushes the transmission member to slide radially outward in the radial groove 4, and the transmission member pushes the wave b 2 to make the outer ring, When the axis 0-0 rotates in the circumferential direction and the middle ring 2 is fixed, the transmission ratio of the outer ring 1 and the inner shaft 3 is -- , inner shaft 3 is opposite to the outer ring 1.
Page 4 of 10
[028] Where n, can also be the absolute value of the difference between na and nb, then the steering of i= -3= shaft 3 and the outer ring 1 are the same, and the n7 transmission ratio is
[029] As shown in figures 3 and 4, the difference between the coaxial transmission of the second embodiment and the first embodiment is that the transmission member includes a push rod 6 and two small rollers 7, which are respectively arranged on both parts of the push rod 6, and the small roller 7 is rotatable relative to the push rod 6, the two small rollers 7 can respectively contact the outer edge of the inner shaft and the inner edge of the outer ring. The entire transmission member is in the radial direction of the middle ring 2 and the length is r-ra.
[030] The transmission ratio of the coaxial transmission of the innovative devise depends on the the number of waves b 1 and b2 , the ration of na and nb, and is not determined by the diameter of the outer ring 1 and the inner shaft 3. Therefore, it can use a small size that achieves the large required transmission ratio, and when the middle ring 2 is fixed, connect the inner shaft 3 with the input shaft of the power system, and connect the outer ring 1 with the output shaft. The coaxial transmission of the innovative devise can be used as a reducer. When the middle ring 2 fixed, connects the outer ring 1 with the input shaft of the power system, and connects the inner shaft 3 with the output shaft. Also the coaxial transmission of the device can be used as a speed increaser. When the outer ring 1, the middle ring 2 and the inner shaft 3 are not fixed, the outer ring 1, the inner shaft 3 and the middle ring 2 can rotate regularly at the same time. The coaxial transmission of the innovative device can also be used as a common bearing or a differential.
[031] In addition to the curve equations defined in the above two embodiments, the curves 11 and 12 can be used to achieve the purpose of the innovative device, and other curve equations can also be used to achieve the purpose of the innovative device, for example: the pole of the curve 11 with the axis 0 as the origin The coordinate equation is:
[032] P (t)=ra+asin(nat)+aAecos(2nat), (t is the angle variable),
[033] The polar coordinate equation of curve 12 with axis 0 as the origin is:
[034] P (t)=r+aosin(nbt)+aA~cos(2nt), (t is the angle variable),
[035] Among them, aA is 1/5 of a; when aA is zero, the polar coordinate equation of the curve 11 with the axis 0 as the origin is: p(t)=ra+asin(nat), (t is the angle variable),
The polar coordinate equation of curve 12 with axis 0 as the origin is: p(t)=rb+asin(nt), (t is the angle variable);
Page 5 of 10
The curves 11 and 12 represented by the above two sets of curve equations and can also achieve the purpose and the affect of the transmission device. Even though it is slightly inferior to the curves disclosed in the first two embodiments, but it is still performs in terms of mechanical efficiency, noise, vibration.
[036] The above is a description of the preferred improvements of the device, and do not limit the scope of the device and do not depart from the design spirit. People who have made changes and improvements should fall within the scope of protection determined by the claims of the device.
Page 6 of 10

Claims (7)

Claims
1. This is a coaxial transmission of the innovative device which includes an outer ring(1), a middle ring (2), an inner shaft(3) and a transmission member, the outer ring(1), the middle ring(2) and the inner shaft(3) are coaxial 0-0, and the outer edge of the inner shaft(3) is evenly provided with na waves bi Curve 11. The base circle radius of the curve 11 is ra, the outer ring(1) is arranged outside the inner shaft(3), the inner edge of the outer ring(1) is a curve 12 with n waves b 2 uniformly, and the radius of the base circle of the curve 12 is rb. The middle ring(2) is arranged between the inner shaft(3) and the outer ring(1). The ne radial grooves (4) are evenly arranged on the middle ring(2), and the transmission member is arranged in the radial groove(4) and can slide in the radial groove(4). The length of the transmission member along the radial direction of the middle ring(2) is rb-ra and the width of the transmission member is the same as the width of the radial groove(4). The wave height a of the wave bi and the wave b2 are the same, The absolute value of the n, is the sum or difference of na and nb. When the inner shaft(3) rotates on the axis 0-0 in the circumferential direction, the wave bi pushes the transmission member to slide radially outward in the radial groove(4). The transmission member pushes the wave b 2 to make the outer ring(1) rotate in the circumferential direction on the axis 0-0, when ne is summing with na and nb, the rotation of the inner shaft(3) and outer ring(1) relative to the middle ring(2) is opposite; when ne is the absolute value of the difference between na and n, the rotation of the inner shaft(3) and outer ring(1) relative to the middle ring(2) is the same.
2.According to the coaxial transmission mentioned in Claim 1, characterized in that, the polar coordinate equation of the curve 11 with the axis 0 as the origin is:
p(t) = r +a -(sin(L!L))2 2 (t is the angle variable); The polar coordinate equation of the curve 12 with the axis 0 as the origin is:
p(t)=rb+a-(sin(" t) 2 2 (t is the angle variable).
3. According to the coaxial transmission mentioned in Claim 1, characterized in that, the polar coordinate equation of the curve 11 with the axis 0 as the origin is: p(t)=ra+assin(nat)+aAocos(2nat), (t is the angle variable); The polar coordinate equation of the curve 12 with the axis 0 as the origin is: Page 9 of 10 p(t)=rb+assin(nt)+aAocos( 2 nbt), (t is the angle variable); Wherein said aA is less than 1/4 of a.
4. According to the coaxial transmission mentioned in claim 2 or 3, characterized in that: the transmission member is a large roller (5), and the diameter of the large roller (5) is rb-ra.
5. According to the coaxial transmission mentioned in claim 2 or 3, characterized in that: the transmission member includes a push rod (6) and two small rollers (7), the two small rollers (7) are respectively arranged at both ends of the push rod (6), and the small rollers (7) are rotatable relative to the push rod (6).
6. According to the coaxial transmission mentioned in claim 4 and 5, characterized in that: the middle ring(2) is provided with a number of fixed through holes (8), and the left and right parts of the middle ring(2) (2) are respectively provided with cover plates (9, 9'), the cover plates (9, 9') are provided with through holes (10) that corresponding to the fixed through holes (8), the fixed through holes (8) and the through holes (10) are connecting with a bolt that is installed inside to fix the middle ring(2) and the cover plate (9, 9').
7. According to the coaxial transmission mentioned in claim 6, characterized in that: the outer part surface of one of the cover plates (9) is provided with a base (11).
Page 10 of 10
AU2021100447A 2021-01-24 2021-01-24 The innovative transmission device relates to a coaxial transmission in which an input shaft and an output shaft are coaxial. The aim of the invention is to provide a coaxial transmission which is simple in structure, small in size, low in cost and will have a long operational life without damage. Active AU2021100447A4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2021100447A AU2021100447A4 (en) 2021-01-24 2021-01-24 The innovative transmission device relates to a coaxial transmission in which an input shaft and an output shaft are coaxial. The aim of the invention is to provide a coaxial transmission which is simple in structure, small in size, low in cost and will have a long operational life without damage.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2021100447A AU2021100447A4 (en) 2021-01-24 2021-01-24 The innovative transmission device relates to a coaxial transmission in which an input shaft and an output shaft are coaxial. The aim of the invention is to provide a coaxial transmission which is simple in structure, small in size, low in cost and will have a long operational life without damage.

Publications (1)

Publication Number Publication Date
AU2021100447A4 true AU2021100447A4 (en) 2021-04-15

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Application Number Title Priority Date Filing Date
AU2021100447A Active AU2021100447A4 (en) 2021-01-24 2021-01-24 The innovative transmission device relates to a coaxial transmission in which an input shaft and an output shaft are coaxial. The aim of the invention is to provide a coaxial transmission which is simple in structure, small in size, low in cost and will have a long operational life without damage.

Country Status (1)

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AU (1) AU2021100447A4 (en)

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