WO2008116961A1 - Variable diameter pulley of high-power continuously variable transmission and continuously variable transmission system - Google Patents

Variable diameter pulley of high-power continuously variable transmission and continuously variable transmission system Download PDF

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Publication number
WO2008116961A1
WO2008116961A1 PCT/FI2007/000245 FI2007000245W WO2008116961A1 WO 2008116961 A1 WO2008116961 A1 WO 2008116961A1 FI 2007000245 W FI2007000245 W FI 2007000245W WO 2008116961 A1 WO2008116961 A1 WO 2008116961A1
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WO
WIPO (PCT)
Prior art keywords
shaped curved
sector shaped
pulley
curved surfaces
conical
Prior art date
Application number
PCT/FI2007/000245
Other languages
French (fr)
Inventor
Sheng Yong
Antti Rautio
Original Assignee
Sheng Yong
Antti Rautio
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sheng Yong, Antti Rautio filed Critical Sheng Yong
Publication of WO2008116961A1 publication Critical patent/WO2008116961A1/en

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Classifications

    • 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
    • F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
    • F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
    • F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
    • F16H9/12—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
    • F16H9/16—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts
    • F16H9/20—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts both flanges of the pulleys being adjustable
    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
    • 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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/52—Pulleys or friction discs of adjustable construction
    • F16H55/56—Pulleys or friction discs of adjustable construction of which the bearing parts are relatively axially adjustable

Definitions

  • Variable diameter pulley of high-power continuously variable transmission and continuously variable transmission system relate to continuously variable transmission (CVT for short) for vehicle.
  • CVTs Vehicles with mechanical CVT can achieve less fuel consumption and good acceleration, but most CVTs for vehicles transmit the power by friction force, and the main driving components such as belt or chain, variable diameter pulleys and so on, are limited by the coefficient of friction and stress endurance, so they can't transmit high power, and the efficiency and reliability can't meet the vehicle performance requirements. As a result, CVTs are only used in some small ears.
  • Reducing and avoiding the relative slip between the driving components of CVT is the effective way for improving the efficiency, increasing the power transmitted, and prolonging the life-span of CVT.
  • variable diameter pulley of the high-power continuously variable transmission is a kind of pulley which is cone-shaped, and there are several sector shaped curved surfaces and conical surfaces distributed alternately on the cone surface, wherein the generators of the said sector shaped curved surfaces are in parallel with the generators of the adjacent conical surfaces; and the angles between any generator of the said sector shaped curved surfaces and the center line of the said cone pulley are same; the said sector shaped curved surface is a kind of concave or convex shaped curved surface which has a different shape from the said conical surfaces. And areas of the said sector shaped curved surfaces and the said conical surfaces are different.
  • Generator in this application is used in the meaning of the top or bottom line of each of the said sector shaped curved surfaces and of the conical surfaces. In this sense the lines are seen from the side.
  • the generator may thus be the apex line of the concave or convex shaped surface or the segment line of the same.
  • the said continuously variable transmission system comprising:
  • variable diameter pulleys are all cone-shaped, and there are several sector shaped curved surfaces and conical surfaces distributed alternately on the cone surface, wherein:
  • the generators of the said sector shaped curved surfaces are in parallel with the generators of the adjacent conical surfaces; - and the angles between any generator of the said sector shaped curved surfaces and the centre line of the said cone pulley are same;
  • the said sector shaped curved surface is a kind of concave or convex shaped curved surface which has a different shape from the said conical surfaces;
  • a continuously variable transmission system is composed of the said four variable diameter pulleys, input shaft, output shaft and the transmitting belt encircling around the wrapping angles of the said four variable diameter pulleys.
  • Figs. 1a and 1b show a longitudinal section of the said continuously variable transmission system
  • Fig. 1 a is a view showing the status before speed-changing
  • Fig. 1 b is a view showing the status after speed-changing
  • Figs. 2a is a front view of the said continuously variable transmission system
  • Fig. 2b is a sectional view on the line A-A in Fig. 2a;
  • Figs.3a and 3b show the principle drawing of the said variable diameter pulley:
  • Fig. 3a is a longitudinal section of the variable diameter pulley;
  • C and D are the enlarged view showing that generators of sector shaped curved surface are in parallel with the conical surfaces;
  • Fig. 3b shows that angles between any generator of the sector shaped curved surfaces and the center line of the cone pulley are same;
  • Figs 4a and 4b show a sketch map showing the connecting relation between the said variable diameter pulley and the transmitting belt;
  • Fig. 4a is a platform;
  • Fig. 4b is a sectional view on the line B-B in Fig. 4a;
  • Figs.5a and 5b are the other sketch map showing the connecting relation between the said variable diameter pulley and the transmitting belt;
  • Fig. 5a is a front view of the connecting relation;
  • Fig. 5b is a side view of the belt 4; and
  • Fig. 5c is a front view of the wedge metal block 2.
  • Transmitting means of the invention is the same as traditional continuously variable transmission with belt or chain.
  • the metal belt or chain 21 , 214, 22 or 215 stays at different contacting points of the pulleys, and the working radii are different, so the speed ratio can be varied in a continuous manner
  • the metal belt used is the transmitting belt produced by VDT from Holland.
  • This belt is made of hundreds of wedge metal blocks 2 and two groups of metal rings 7 as described in Fig.5, and the metal rings 7 are set in the cut-outs on both sides of the block 2, so that hundreds of blocks are connected together, forming a flexible transmitting belt 4.
  • Traditional continuously variable transmission transmits power by friction force between the wedge surface of the belt and the conical surface of the pulleys.
  • this invention is an innovation in the contacting means between belt 4 or chain and variable diameter pulley 11 - 14, and the invention achieves the power transmitting by the wedging force generated between belt 4 or chain and the pulleys 11 - 14.
  • the key technology of the invention is that: there are several sector shaped curved surfaces 61 , 62 and conical surfaces 51, 52 distributed alternately on the cone surface, the shape of the variable diameter pulley 1 is cone-shaped, and the sector shaped curved surfaces 61, 62 and conical surfaces 51 , 52 have characters as follows:
  • Generators of the said sector shaped curved surfaces are in parallel with the corresponding generators of which the conical surfaces 51 , 52 is composed. Reference is made to the enlarged view C, D shown in Fig. 3a, wherein the continuous line is the generator of the conical surface, while the dash line is the generator of sector shaped curved surface, and the distances between the two lines at different radius points are equal and the two lines are parallel;
  • the sector shaped curved surface which has the two above characters can be formed by concave or convex shaped curved surface which has a different shape from the conical surfaces;
  • the cone-shaped variable diameter pulley composed of conical surfaces and sector shaped curved surfaces is suitable for different kinds of metal belts and metal chains specially used in continuously variable transmission.
  • the shaft hole of the pulley is machined in spline-shaped shown e.g. in Fig. 2b.
  • Two variable diameter pulleys 11 , 12 are assembled on the same spline shaft 3, and the sector shaped curved surfaces 61 , 62 and the conical surfaces 51 , 52 of the two pulleys are set respectively face to face.
  • the belt 4 or chain encircles around the wrapping angle ⁇ as shown in Fig. 4b, the belt or chain in the arc area, of the two variable diameter pulleys, and within the wrapping angle ⁇ , its working radius on different curved surfaces self adaptively changes because of the effect of tension force F1 , F2 (Refer to Fig 4) existing in belt or chain itself.
  • the working radius of the metal blocks 2 of transmitting belt 4 (or the chain links) in sector shaped curved surfaces 61 , 62 area is defined as R2
  • the working radius of the metal blocks 2 of transmitting belt 4 or the chain links in the conical surfaces 51 , 52 area is defined as R1
  • R2 is smaller than R1 as shown in Fig. 4b.
  • the first force is the circumferential resistance F3, F4 from the axial convex curved surfaces of the two adjacent conical surfaces
  • the second force is the tension force F1, F2 existing in belt or chain, which can prevent the belt or chain from moving to the outside of the said working radius and moving over the adjacent axial convex curved surfaces which can avoid the circumferential slip of the belt or chain.
  • the circumferential force between the transmitting belt 4 or chain and the variable diameter pulleys 1 serve as the self wedging force, and this can make the belt and pulley run at the same speed and in the same direction, so the power can be transmitted effectively.
  • this self wedging force can avoid the circumferential relative slip between the belt or chain and the two variable diameter pulleys which is a common phenomenon during the work, so high torque can be transmitted by belt or chain and pulleys.
  • variable diameter pulley with sector shaped curved surfaces and conical surfaces has the performance of circumferential self wedging, and the connecting relation between the pulleys and other transmitting components has been explained before.
  • the whole transmission system is composed of traditional symmetrical governor CVT with two shafts and four conical pulleys.
  • the power is input through input shaft, namely spline shaft 3, and then transmitted from two driving pulleys 11 , 12 to two driven pulleys 13, 14 via the transmitting belt 4 or chain. By this, the speed is changed, and power is output through output shaft 8.

Abstract

Variable diameter pulley of continuously variable transmission for high-power vehicles and the continuously variable transmission system relate to continuously variable transmission, wherein the pulley (11-14) is cone-shaped. On the surface there are several sector shaped curved surfaces (61, 62) and conical surfaces (51, 52) distributed alternately, and the generators of the sector shaped curved surfaces are in parallel with the generators of the conical surfaces. The angles between any generator of the sector shaped curved surfaces and the centre line of the cone pulley are same. Said sector shaped curved surface is concave or convex shaped curved surface which has a different shape from the conical surfaces. Two variable diameter pulleys (11-14) are assembled on the same spline shaft (3, 8) in such a way that the sector shaped curved surfaces and conical surfaces of the two pulleys are set respectively face to face.

Description

Variable diameter pulley of high-power continuously variable transmission and continuously variable transmission system
Field of the invention
Variable diameter pulley of high-power continuously variable transmission and continuously variable transmission system relate to continuously variable transmission (CVT for short) for vehicle.
Background of the invention
Vehicles with mechanical CVT can achieve less fuel consumption and good acceleration, but most CVTs for vehicles transmit the power by friction force, and the main driving components such as belt or chain, variable diameter pulleys and so on, are limited by the coefficient of friction and stress endurance, so they can't transmit high power, and the efficiency and reliability can't meet the vehicle performance requirements. As a result, CVTs are only used in some small ears.
Reducing and avoiding the relative slip between the driving components of CVT is the effective way for improving the efficiency, increasing the power transmitted, and prolonging the life-span of CVT.
Summary of the invention
It is an object of the invention to provide a kind of variable diameter pulley used in CVT of belt or chain, which can achieve high efficiency, long life-span and can be used to transmit high power, and also provide a high-power continuously variable transmission system.
These and other advantages of the invention have been achieved with a variable diameter pulley of high-power continuously variable transmission and a continuously variable transmission system the characteristic properties of which have been given in the claims. The said variable diameter pulley of the high-power continuously variable transmission, is a kind of pulley which is cone-shaped, and there are several sector shaped curved surfaces and conical surfaces distributed alternately on the cone surface, wherein the generators of the said sector shaped curved surfaces are in parallel with the generators of the adjacent conical surfaces; and the angles between any generator of the said sector shaped curved surfaces and the center line of the said cone pulley are same; the said sector shaped curved surface is a kind of concave or convex shaped curved surface which has a different shape from the said conical surfaces. And areas of the said sector shaped curved surfaces and the said conical surfaces are different.
"Generator" in this application is used in the meaning of the top or bottom line of each of the said sector shaped curved surfaces and of the conical surfaces. In this sense the lines are seen from the side. The generator may thus be the apex line of the concave or convex shaped surface or the segment line of the same.
The said continuously variable transmission system, comprising:
- four variable diameter pulleys, input shaft, output shaft and transmitting belt, wherein: - said variable diameter pulleys are all cone-shaped, and there are several sector shaped curved surfaces and conical surfaces distributed alternately on the cone surface, wherein:
- the generators of the said sector shaped curved surfaces are in parallel with the generators of the adjacent conical surfaces; - and the angles between any generator of the said sector shaped curved surfaces and the centre line of the said cone pulley are same;
- and the said sector shaped curved surface is a kind of concave or convex shaped curved surface which has a different shape from the said conical surfaces;
- input shaft and output shaft, when every two of the said variable diameter pulleys are assembled on the same input shaft or output shaft in such a way that the sector shaped curved surfaces and conical surfaces of the two pulleys are set respectively face to face, a continuously variable transmission system is composed of the said four variable diameter pulleys, input shaft, output shaft and the transmitting belt encircling around the wrapping angles of the said four variable diameter pulleys.
As is proved by the test, it can achieve the prospective object. The belt whose original torque rapacity is 180 Nm is used in the test rig, but the torque actually transmitted without slip between belt and pulleys can reach 470 Nm, which is higher than all CVTs for vehicles. It proves that it is feasible to transmit high torque with this kind of variable diameter pulley.
Brief description of the drawings
Figs. 1a and 1b show a longitudinal section of the said continuously variable transmission system;
Fig. 1 a, is a view showing the status before speed-changing; Fig. 1 b, is a view showing the status after speed-changing;
Figs. 2a is a front view of the said continuously variable transmission system; Fig. 2b is a sectional view on the line A-A in Fig. 2a;
Figs.3a and 3b show the principle drawing of the said variable diameter pulley: Fig. 3a is a longitudinal section of the variable diameter pulley; C and D are the enlarged view showing that generators of sector shaped curved surface are in parallel with the conical surfaces; Fig. 3b shows that angles between any generator of the sector shaped curved surfaces and the center line of the cone pulley are same;
Figs 4a and 4b show a sketch map showing the connecting relation between the said variable diameter pulley and the transmitting belt; Fig. 4a is a platform; Fig. 4b is a sectional view on the line B-B in Fig. 4a;
Figs.5a and 5b are the other sketch map showing the connecting relation between the said variable diameter pulley and the transmitting belt; Fig. 5a is a front view of the connecting relation; Fig. 5b is a side view of the belt 4; and
Fig. 5c is a front view of the wedge metal block 2.
Detailed description of the embodiments
Transmitting means of the invention is the same as traditional continuously variable transmission with belt or chain. By axial movement of variable diameter pulleys 11 - 14, the metal belt or chain 21 , 214, 22 or 215 stays at different contacting points of the pulleys, and the working radii are different, so the speed ratio can be varied in a continuous manner
In the embodiment test, the metal belt used is the transmitting belt produced by VDT from Holland. This belt is made of hundreds of wedge metal blocks 2 and two groups of metal rings 7 as described in Fig.5, and the metal rings 7 are set in the cut-outs on both sides of the block 2, so that hundreds of blocks are connected together, forming a flexible transmitting belt 4. Traditional continuously variable transmission transmits power by friction force between the wedge surface of the belt and the conical surface of the pulleys.
The difference between the invention and the traditional continuously variable transmission with belt or chain is that, this invention is an innovation in the contacting means between belt 4 or chain and variable diameter pulley 11 - 14, and the invention achieves the power transmitting by the wedging force generated between belt 4 or chain and the pulleys 11 - 14. The key technology of the invention is that: there are several sector shaped curved surfaces 61 , 62 and conical surfaces 51, 52 distributed alternately on the cone surface, the shape of the variable diameter pulley 1 is cone-shaped, and the sector shaped curved surfaces 61, 62 and conical surfaces 51 , 52 have characters as follows:
1. Generators of the said sector shaped curved surfaces are in parallel with the corresponding generators of which the conical surfaces 51 , 52 is composed. Reference is made to the enlarged view C, D shown in Fig. 3a, wherein the continuous line is the generator of the conical surface, while the dash line is the generator of sector shaped curved surface, and the distances between the two lines at different radius points are equal and the two lines are parallel;
2. The angles between any generator of the said sector shaped curved surfaces, dash line shown in Fig. 3b, and the centre line of the cone pulley are same;
3. The sector shaped curved surface which has the two above characters can be formed by concave or convex shaped curved surface which has a different shape from the conical surfaces;
4. The cone-shaped variable diameter pulley composed of conical surfaces and sector shaped curved surfaces is suitable for different kinds of metal belts and metal chains specially used in continuously variable transmission.
Its working principle is that: the shaft hole of the pulley is machined in spline-shaped shown e.g. in Fig. 2b. Two variable diameter pulleys 11 , 12 are assembled on the same spline shaft 3, and the sector shaped curved surfaces 61 , 62 and the conical surfaces 51 , 52 of the two pulleys are set respectively face to face. The belt 4 or chain encircles around the wrapping angle θ as shown in Fig. 4b, the belt or chain in the arc area, of the two variable diameter pulleys, and within the wrapping angle θ , its working radius on different curved surfaces self adaptively changes because of the effect of tension force F1 , F2 (Refer to Fig 4) existing in belt or chain itself. Because the axial projection size of the two sector shaped curved surfaces 61 , 62 is larger than that of the two conical surfaces 51 , 52 (Refer to Fig. 2a ), the working radius of the metal blocks 2 of transmitting belt 4 (or the chain links) in sector shaped curved surfaces 61 , 62 area is defined as R2, while the working radius of the metal blocks 2 of transmitting belt 4 or the chain links in the conical surfaces 51 , 52 area is defined as R1, and R2 is smaller than R1 as shown in Fig. 4b. As a result, both wedge contacting surfaces of the metal blocks 2 of the transmitting belt 4 or the chain links in the sector shaped curved surfaces 61 , 62 (As shown in Fig. 4b, take the blocks or chain links in the sector shaped curved surfaces for example) are exposed to two forces: the first force is the circumferential resistance F3, F4 from the axial convex curved surfaces of the two adjacent conical surfaces; the second force is the tension force F1, F2 existing in belt or chain, which can prevent the belt or chain from moving to the outside of the said working radius and moving over the adjacent axial convex curved surfaces which can avoid the circumferential slip of the belt or chain. As a result, the circumferential force between the transmitting belt 4 or chain and the variable diameter pulleys 1 serve as the self wedging force, and this can make the belt and pulley run at the same speed and in the same direction, so the power can be transmitted effectively.
It's proved that: this self wedging force can avoid the circumferential relative slip between the belt or chain and the two variable diameter pulleys which is a common phenomenon during the work, so high torque can be transmitted by belt or chain and pulleys.
As shown in Figs. 1-5, variable diameter pulley with sector shaped curved surfaces and conical surfaces has the performance of circumferential self wedging, and the connecting relation between the pulleys and other transmitting components has been explained before. The whole transmission system is composed of traditional symmetrical governor CVT with two shafts and four conical pulleys. The power is input through input shaft, namely spline shaft 3, and then transmitted from two driving pulleys 11 , 12 to two driven pulleys 13, 14 via the transmitting belt 4 or chain. By this, the speed is changed, and power is output through output shaft 8.
There are a fixed variable diameter pulley and an axially movable variable diameter pulley on both the input shaft and the output shaft, and the movement of the axially movable pulleys on the two shafts can be controlled by the current electric-hydraulic control system widely used in ECVT. As this control method has been developed and well-known, here don't explain in detail.

Claims

Claims
1. Variable diameter pulley for a continuously variable transmission, basically in a conical form, characterized in that the pulley has sector shaped curved surfaces (61 , 62) and conical surfaces (51 , 52) in an alternating relation to each other, wherein the generator of each sector shaped curved surface (61 , 62) is parallel with the generator of the adjacent conical surface (51, 52); the angles between any generator of said sector shaped curved surfaces and the centre line of said conical pulley are same; the said sector shaped curved surface is curved in a concave or convex manner and having a different shape from the conical surface.
2. Pulley according to claim 1 , characterized in that the areas of the said sector shaped curved surfaces (61, 62) and the said conical surfaces (51 ,52) are different.
3. Pulley according to claim 2, characterized in that the area of the sector shaped curved surfaces (61 , 62) is bigger that of the conical surfaces (51 , 52).
4. Pulley according to claim 1, characterized in that the sector shaped curved surfaces have been distributed along the conical surface of the pulley with even distances from each other.
5. Pulley according to claim 1 , characterized in that the sector shaped curved surfaces (61) in one pulley (11) are opposite to the sector shaped curved surfaces (62) on the opposite pulley (12).
6. Continuously variable transmission system, comprising: four variable diameter pulleys (11-14), an input shaft (3), an output shaft (8) and a transmitting belt (4), wherein the said variable diameter pulleys are all cone-shaped, characterized in that and there are several sector shaped curved surfaces (61, 62) and conical surfaces (51 , 52) distributed alternately on their conical surfaces, wherein: the generators of the said sector shaped curved surfaces are in parallel with the generators of the adjacent conical surfaces; the angles between any generator of the said sector shaped curved surfaces and the centre line of the said cone pulley are same; said sector shaped curved surfaces (61 , 62) are curved in a concave or convex manner and have a different shape from the said conical surfaces (51 , 52); input shaft (3) and output shaft (8), when every two of the said variable diameter pulleys are assembled on the same input shaft or output shaft in such a way that the sector shaped curved surfaces and conical surfaces of the two pulleys are set respectively face to face, a continuously variable transmission system is composed of the said four variable diameter pulleys, input shaft, output shaft and the transmitting belt or chain encircling around the wrapping angles of the said four variable diameter pulleys.
7. Continuously variable transmission system according to claim 6, characterized in that the said input shaft (3) is a spline shaft.
8. Continuously variable transmission system according to claim 6, characterized in that one of the pulleys (11 -14) of the pair of pulleys on each shaft is axially movable.
PCT/FI2007/000245 2007-03-26 2007-10-12 Variable diameter pulley of high-power continuously variable transmission and continuously variable transmission system WO2008116961A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710086609.5 2007-03-26
CNA2007100866095A CN101275662A (en) 2007-03-26 2007-03-26 Infinitely variable speed gearing and transmission diameter changing cone disk of high-power stepless speed variator

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Publication Number Publication Date
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Cited By (2)

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NL1039559C2 (en) * 2012-04-23 2013-10-28 Bosch Gmbh Robert Belt-and-pulley-type continuously variable transmission.
CN109001043A (en) * 2018-09-18 2018-12-14 浙江工搪化工设备有限公司 A kind of glass-lined equipment pressure vessel resistance to compression detection device

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CN105485278A (en) * 2016-02-22 2016-04-13 上海洲跃生物科技有限公司 Diameter-variable wheel type continuously-variable transmission
CN105526320A (en) * 2016-03-01 2016-04-27 上海洲跃生物科技有限公司 Mechanical continuously-variable transmission
JP6465100B2 (en) * 2016-12-13 2019-02-06 トヨタ自動車株式会社 Belt type continuously variable transmission
CN107559406A (en) * 2017-09-13 2018-01-09 王国斌 A kind of buncher use can be driven high pulling torque cone pulley
CN107816534A (en) * 2017-11-28 2018-03-20 刘建文 A kind of electrodeless variable-speed wheel disc that can infinitely adjust gear ratio
CN109372962A (en) * 2018-12-17 2019-02-22 刘天军 There is a grade CVT automatic gear-box
CN112709793B (en) * 2020-05-20 2023-12-12 杭州肇鹏科技有限公司 Stepless speed changer for small power machine
CN111946785A (en) * 2020-09-22 2020-11-17 李立好 Stepless automatic gearbox with divided teeth

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JPS60109661A (en) * 1983-11-14 1985-06-15 Toyota Motor Corp Disc for belt-drive type continuously variable transmission
EP1018611A1 (en) * 1999-01-08 2000-07-12 Bai-Guang Liau Construction for a stepless variable pulley
WO2001036846A1 (en) * 1999-11-18 2001-05-25 The Gates Corporation Continuously variable transmission pulley
EP1640310A2 (en) * 2004-09-23 2006-03-29 George Bowman Differential pulley

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DE1525025A1 (en) * 1965-04-27 1969-06-19 Bluecher Wahlstatt Leichtmet V-belt pulley
JPS60109661A (en) * 1983-11-14 1985-06-15 Toyota Motor Corp Disc for belt-drive type continuously variable transmission
EP1018611A1 (en) * 1999-01-08 2000-07-12 Bai-Guang Liau Construction for a stepless variable pulley
WO2001036846A1 (en) * 1999-11-18 2001-05-25 The Gates Corporation Continuously variable transmission pulley
EP1640310A2 (en) * 2004-09-23 2006-03-29 George Bowman Differential pulley

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1039559C2 (en) * 2012-04-23 2013-10-28 Bosch Gmbh Robert Belt-and-pulley-type continuously variable transmission.
WO2013159910A1 (en) * 2012-04-23 2013-10-31 Robert Bosch Gmbh Belt-and-pulley-type continuously variable transmission
CN104620023A (en) * 2012-04-23 2015-05-13 罗伯特·博世有限公司 Belt-and-pulley-type continuously variable transmission
US9371902B2 (en) 2012-04-23 2016-06-21 Robert Bosch Gmbh Belt-and-pulley-type continuously variable transmission
CN109001043A (en) * 2018-09-18 2018-12-14 浙江工搪化工设备有限公司 A kind of glass-lined equipment pressure vessel resistance to compression detection device

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