CN108506447B - Continuously variable transmission - Google Patents
Continuously variable transmission Download PDFInfo
- Publication number
- CN108506447B CN108506447B CN201710102302.3A CN201710102302A CN108506447B CN 108506447 B CN108506447 B CN 108506447B CN 201710102302 A CN201710102302 A CN 201710102302A CN 108506447 B CN108506447 B CN 108506447B
- Authority
- CN
- China
- Prior art keywords
- ring
- cone pulley
- speed changing
- screw
- power
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 93
- 230000007246 mechanism Effects 0.000 claims abstract description 62
- 238000003825 pressing Methods 0.000 claims abstract description 21
- 230000008859 change Effects 0.000 claims description 32
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 14
- 230000033001 locomotion Effects 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000000306 component Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000037078 sports performance Effects 0.000 description 1
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
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H2061/6604—Special control features generally applicable to continuously variable gearings
Abstract
The present invention discloses a continuously variable transmission, comprising: the power transmission mechanism at least comprises a power input part and a power output part; a shift ring surrounding the power transmission mechanism, comprising: a ring shape a central shaft; the conical elastic pieces are arranged on the annular central shaft and can rotate around the power transmission mechanism along the annular central shaft; wherein, at least one conical spring plate is driven by the power input part to rotate around the power transmission mechanism; at least one conical spring piece drives the power output part to rotate; each conical spring piece can rotate by taking the annular central shaft as the center; the speed changing unit at least comprises a pressing device which is arranged on the outer side of the speed changing ring and is connected with the speed changing ring, and the pressing device controls at least one conical spring piece to roll on the surface of the power input part and/or the power output part while rotating around the annular central shaft so as to drive the speed changing ring to move along the first direction.
Description
Technical Field
The invention relates to a stepless speed changer which can be applied to automobiles and other mechanical devices for transmitting power.
Background
The automatic transmission is used as a core component of automobiles and other mechanical transmission devices, and currently mainly comprises four main types of an electric control mechanical automatic transmission (AMT), a hydraulic Automatic Transmission (AT), a double clutch automatic transmission (DCT) and a mechanical stepless automatic transmission (CVT). The mechanical stepless automatic transmission (CVT) has the characteristics of continuous speed change, sustainable power output in the speed change process and the like, so that the rotating speed of an engine can be kept in the most economical working area, and the effects of lowest oil consumption, most gentle running and the like in an automobile or a mechanical device of the same type under the same condition are realized. In addition, the mechanical stepless automatic transmission (CVT) has the advantages of simple structure, less parts, smaller volume, lighter weight and the like compared with the traditional transmission.
The mechanical stepless automatic transmission (CVT) mainly has various structures such as V-shaped rubber belt type, V-shaped metal belt type, multi-disc type, steel ball type, roller turntable type, chain type and the like. Currently, the mainstream mechanical continuously variable automatic transmission (CVT) is a V-shaped metal belt or chain with a hydraulic pressing device, where the V-shaped metal belt or chain is formed by stringing a plurality of V-shaped steel plates or links.
However, the existing mechanical continuously variable automatic transmission (CVT) is mainly applied to a household vehicle with low torque and low motion performance because the V-shaped metal belt or chain is subjected to both tangential friction force to achieve power transmission and radial sliding to achieve a speed change function during speed change, and thus has high control requirements on the pressing force acting on the steel sheet or chain link. If it is applied to a vehicle or an apparatus with high torque and high sports performance requirements, there are at least the following problems:
1. the transmission belt is easy to damage, so that the requirement on the material of the transmission belt is high;
2. transmission device cannot bear a larger load;
3. the transmission belt cannot be rapidly moved radially, so that the use requirement of rapid speed change of the vehicle cannot be met;
4. the manufacturing process of the transmission is complicated.
Disclosure of Invention
In view of the drawbacks of the prior art, an object of the present invention is to provide a continuously variable transmission. The stepless speed changer has small friction resistance in the speed changing process and can realize quick speed changing.
According to an aspect of the present invention, there is provided a continuously variable transmission including: the power transmission mechanism at least comprises a power input part and a power output part; a shift ring surrounding the power transmission mechanism, and the shift ring being movable back and forth in a first direction, the shift ring comprising: an annular central shaft; the conical elastic pieces are arranged on the annular central shaft and can rotate around the power transmission mechanism along the annular central shaft; at least one conical spring plate is connected with the power input part, and the power input part drives the conical spring plate to rotate around the power transmission mechanism; at least one conical spring plate is connected with the power output part and drives the power output part to rotate; each conical spring piece can rotate by taking the annular central shaft as a center; the speed changing unit at least comprises a pressing device, the pressing device is arranged on the outer side of the speed changing ring and is connected with the speed changing ring, and the pressing device controls at least one conical spring piece to roll on the surface of the power input part and/or the power output part while rotating around the annular central shaft to drive the speed changing ring to move along the first direction and adjust the rotating speed of the power output part of the power transmission mechanism.
Preferably, the speed change unit further includes: the speed change screw rod mechanism is arranged outside the speed change ring, the variable speed screw mechanism comprises: a screw rod, wherein the screw rod is provided with a screw hole, the screw rod extends along the first direction; and a screw rod nut sleeved on the screw rod, and can move back and forth along the screw rod in a first direction; the speed change control mechanism is connected with the screw rod and drives the screw rod to rotate so as to control the screw rod nut to move along the screw rod in a first direction; the compressing device is further connected with the screw-nut, and can synchronously move along with the screw-nut in the first direction so as to drive at least one conical spring piece to roll on the surface of the power input component and/or the power output component while rotating around the annular central shaft to drive the speed changing ring to move in the first direction.
Preferably, the speed changing unit comprises two speed changing screw rod mechanisms which are respectively arranged at two sides of the speed changing ring, and screw rods of the two speed-change screw rod mechanisms are connected with the speed-change control mechanism.
Preferably, the speed changing unit comprises two pressing devices, each pressing device comprises a roller and a roller shaft, the rollers are sleeved on the roller shafts, and each roller is connected with one screw nut and the speed changing ring and can move along the roller shafts along with the screw nut.
Preferably, each variable speed screw mechanism further comprises a synchronous sprocket, and the synchronous sprockets are arranged at the same end of the variable speed screw mechanism; the speed changing unit further comprises a toothed chain surrounding the two synchronous sprockets.
Preferably, the power input part comprises an input shaft and a first cone pulley sleeved on the input shaft, the first cone pulley is connected with the speed changing ring and at least drives at least one conical spring piece of the speed changing ring to rotate;
the power output part comprises an output shaft and a second cone pulley sleeved on the output shaft, the second cone pulley is connected with the speed changing ring and rotates under the driving of the speed changing ring, and the second cone pulley and the first cone pulley face opposite directions.
Preferably, the first cone pulley has the same size as the second cone pulley, and the axis of the first cone pulley is parallel to the axis of the second cone pulley.
Preferably, the surface of the first cone pulley and/or the second cone pulley is provided with grooves.
Preferably, the continuously variable transmission further includes a housing, and the power transmission mechanism and the speed change unit are disposed in the housing.
Compared with the prior art, the continuously variable transmission provided by the embodiment of the invention realizes the speed change of the continuously variable transmission by controlling the speed changing ring to move along the first direction by the speed changing unit so as to adjust the rotating speed of the power output part of the power transmission mechanism, wherein in the speed changing process, the speed changing ring moves on the surface of a cone pulley (such as a first cone pulley and a second cone pulley) in a rolling mode in the moving process of the first direction because the speed changing ring comprises a plurality of conical spring plates capable of rotating around the annular central shaft, and compared with the sliding mode adopted by the steel belt of the traditional mechanical Continuously Variable Transmission (CVT) in the speed changing process, the continuously variable transmission has the advantages of small friction resistance, capability of realizing rapid speed change and the like. The speed-changing ring has the advantages of large contact area, small running abrasion, long service life and the like. In addition, the structure of the continuously variable transmission avoids the adoption of a complex hydraulic pressing device in the existing continuously variable transmission, so that the continuously variable transmission has the advantages of being simple in manufacture, low in cost, high in reliability and the like.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic cross-sectional view of a continuously variable transmission according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the structure A-A of FIG. 1;
FIG. 3 is a partial enlarged view at B in FIG. 2;
fig. 4 is a schematic diagram of a motion trace of a conical spring of a shift ring in a transmission and shifting process of the continuously variable transmission.
Reference numerals
1. Power input part
11. Input shaft
12. First cone pulley
2. Power output part
21. Output shaft
22. Second cone pulley
3. Gear ring
31. Conical spring plate
32. Annular center shaft
4. Variable speed screw rod mechanism
41. Screw rod
42. Screw nut
43. Synchronous sprocket
5. Compacting device
51. Roller wheel
52. Roller shaft
6. Shell body
Detailed Description
The technical contents of the present invention will be further described with reference to the accompanying drawings and examples.
Referring to fig. 1 to 4, a schematic cross-sectional structure of a continuously variable transmission, a partial enlarged view of a shift ring, and a schematic movement trace of a conical spring of the shift ring during transmission and shifting according to a first embodiment of the present invention are shown. Wherein FIG. 2 is a schematic cross-sectional view of the structure at A-A in FIG. 1; fig. 3 is a partial enlarged view at B in fig. 2. In a preferred embodiment of the present invention, the continuously variable transmission mainly includes a power transmission mechanism, a shift ring, and a shift unit.
The power transmission mechanism at least comprises a power input part and a power output part. In the embodiment shown in fig. 1 and 2, the power input member 1 includes an input shaft 11 and a first cone pulley 12 sleeved on the input shaft 11. The power output part 2 comprises an output shaft 21 and a second cone 22 sleeved on the output shaft 21. Wherein the first cone pulley 12 and the input shaft 11 are fixed to each other and can synchronously rotate with the input shaft 11 (the rotation here means the rotation of the input shaft 11 driven by an engine or other device); the second cone 22 and the output shaft 21 are fixed to each other and are rotatable synchronously with the output shaft 21 (rotation here means synchronous rotation of the output shaft 21 by the second cone 22). As shown in fig. 1, the second cone 22 of the power output member 2 is opposite to the first cone 12 of the power input member 1, i.e., the smaller-sized end of the second cone 22 is directed toward the larger-sized end of the first cone 12; accordingly, the smaller sized end of the first cone pulley 12 faces the larger sized end of the second cone pulley 22. Further, in the preferred embodiment shown in fig. 1 and 2, the first cone pulley 12 and the second cone pulley 22 are the same size, and the axis of the first cone pulley 12 is parallel to the axis of the second cone pulley 22. It is further preferred that the surface of the first cone pulley 12 and/or the second cone pulley 22 have grooves for reducing the phenomenon of slip that may occur to the shift ring.
The shift ring 3 surrounds the power transmission mechanism, and the shift ring 3 is movable back and forth in a first direction (X-axis direction in fig. 1). As shown in fig. 2 and 3, the shift ring 3 may be a steel ring formed by a conical spring string. Specifically, the gear ring 3 includes an annular central shaft 32 and a plurality of conical spring plates 31. The conical spring plates 31 are disposed on the annular central shaft 32. Wherein, a plurality of conical shrapnel 31 can rotate around the power transmission mechanism along the annular central shaft 32. And each conical spring piece 31 can rotate by taking the annular central shaft 32 as the center, so that the speed changing ring 3 can adopt a rolling mode in the process of moving along the first direction and realizing the speed changing of the stepless speed changer, and compared with the sliding mode adopted by the steel belt of the traditional mechanical stepless automatic speed Changer (CVT) in the speed changing process, the speed changing device has the advantages of small friction resistance, capability of realizing rapid speed changing and the like.
More specifically, at least one conical spring piece of the plurality of conical spring pieces of the speed changing ring 3 is connected with the power input part, and the power input part drives the conical spring piece to rotate. In the embodiment shown in fig. 1 and 2, at least one conical spring of the gear ring 3 is connected to the first cone pulley 12, and the first cone pulley 12 drives the conical spring to rotate. The conical spring plate can push other conical spring plates on the speed changing ring 3 to rotate around the power input part 1 and the power output part 2 after rotating, so that the speed changing ring 3 can rotate. Here, the connection between the first cone pulley 12 and the conical spring may refer to the mutual engagement between the first cone pulley 12 and the plurality of conical spring, or may refer to the mutual attachment between the first cone pulley 12 and the plurality of conical spring. The rotation of the shift ring 3 herein refers to the rotation of the shift ring 3 driven by the first cone pulley 12, and, based on the above-described structure of the conical spring pieces and the annular center shaft, the rotation of the plurality of conical spring pieces 31 on the shift ring 3 around the power transmission mechanism along the annular center shaft 32 may be understood.
At least one conical spring of the speed changing ring 3 is also connected with the second cone 22, and the plurality of conical spring rotates to drive the second cone 22 to rotate (the connection and rotation meaning is similar to that of the first cone 12), and in this embodiment, the power of the power input part 1 is transmitted to the power output part 2 through the speed changing ring 3.
The shift unit controls movement of the shift ring in a first direction to adjust a rotational speed of the power output member. The speed changing unit comprises a speed changing screw rod mechanism 4, a pressing device 5 and a speed changing control mechanism. In the embodiment shown in fig. 1 and 2, the gear unit comprises two gear spindle mechanisms 4 and two pressing devices 5. Wherein, two speed change screw rod mechanisms 4 are respectively arranged at two sides of the speed change ring 3 (in fig. 1 and 2, are arranged at the upper side and the lower side of the speed change ring 3), and the two speed change screw rod mechanisms 4 are connected with one speed change control mechanism. It should be noted that, although the embodiment shown in fig. 1 and 2 is illustrated by taking the speed changing unit having two speed changing screw mechanisms 4 and two pressing devices 5 as an example, the present invention is not limited thereto, and in other embodiments of the present invention, the number of speed changing screw mechanisms and pressing devices may be adjusted according to actual needs, for example, three or four speed changing screw mechanisms and pressing devices are not described herein.
Since the two shift screw mechanisms 4 and the two hold-down devices 5 are identical in structure in this embodiment, the shift screw mechanisms 4 and the hold-down devices 5 disposed above the shift ring 3 in fig. 1 are exemplified. Specifically, the shift screw mechanism 4 is provided outside the shift ring 3, and the shift screw mechanism 4 includes a screw 41 and a screw nut 42. As shown in fig. 1, the screw 41 extends in a first direction (X-axis direction in fig. 1). The screw nut 42 is sleeved on the screw 41 and can move back and forth along the screw 41 in the first direction. The movement of the screw nut 42 along the screw 41 means movement along the thread on the surface of the screw 41 during the rotation of the screw 41.
The compressing device 5 is arranged outside the speed changing ring 3 and is connected with the screw nut 42 and the speed changing ring 3. The compressing device 5 can synchronously move along with the screw nut 42 in the first direction, and control at least one conical spring piece 31 to rotate around the annular central shaft 32, and roll on the surface of the power input part 1 and/or the power output part 2 to drive the speed changing ring 3 to move in the first direction, and the compressing device 5 can play a role in extrusion deformation on the conical spring piece 31 of the speed changing ring 3, so that the speed changing ring 3 is attached to the first cone pulley 12 and the second cone pulley 22 in an elliptic form, the contact area between the speed changing ring 3 and the first cone pulley 12 and the second cone pulley 22 is increased, stress concentration and slipping are avoided, and effective power transmission is realized. In particular, in the embodiment shown in fig. 1 and 2, the compacting device 5 comprises a roller 51 and a roller shaft 52. The roller 51 is sleeved on the roller shaft 52. The roller 51 is connected to the spindle nut 42 and the conical spring 31 of the shift ring 3 and is movable with the spindle nut 42 along the roller shaft 52 in a first direction.
It is further preferred that the centerline of the roller shaft 52 has an angle with the contours of the first cone pulley 12 and the second cone pulley 22 that is smaller at the tip ends (i.e., smaller sized ends) of the first cone pulley 12 and the second cone pulley 22 to achieve greater deformation of the shift ring 3 as it travels into this area and thus greater contact area with the first cone pulley, thereby reducing slippage of the shift ring 3.
The shift control mechanism (not shown in fig. 1 and 2) is connected to the screw 41 to drive the screw 41 to rotate, thereby controlling the movement of the screw nut 42 along the screw 41 in the first direction.
Further, in the embodiment shown in fig. 1 and 2, each variable speed screw mechanism 4 further comprises a synchronizing sprocket 43. Both synchronizing sprockets 43 are provided at the same end of the variable speed screw mechanism 4. The gear unit further comprises a toothed chain (not shown in fig. 1 and 2) surrounding the two synchronizing sprockets 43. The toothed chain is connected with the two synchronous chain wheels 43, so that the rotation speeds of the two screw rods 41 can be kept consistent, and the rollers 51 of the two pressing devices 5 can be synchronously moved under the condition that the rotation speeds of the two screw rods 41 are consistent, thereby ensuring the stability of the shifting ring 3 in the moving process.
For clarity of explanation of the movement trace of the conical spring of the shift ring, fig. 4 shows a schematic diagram of the movement trace of the conical spring of the shift ring in the transmission and shifting process of the continuously variable transmission of the present invention. Fig. 4 schematically illustrates a conical spring 31 on the shift ring 3.
Further, in the continuously variable transmission according to the present invention, as shown in fig. 1 to 4, the first cone pulley 12 and the input shaft 11 are fixed to each other, and the conical spring 31 of the shift ring 3 is driven to rotate around the power transmission mechanism (as shown in fig. 4, the conical spring 31 rotates in the direction D2, which can be understood as the shift ring 3 rotates as a whole), and the conical spring 31 on the shift ring 3 is connected to the second cone pulley 22, so that the plurality of conical spring can drive the second cone pulley 22 to rotate (spin) after rotating, thereby realizing the transmission of power.
Further, in the case where the continuously variable transmission is required to perform a speed change in the embodiment shown in fig. 1 to 4, the speed change control mechanism drives the screw 41 of the speed change screw mechanism 4 to axially rotate (i.e., spin), and the screw 41 rotates to move the screw nut 42 in the first direction, so that the roller 51 is driven by the screw nut 42 to move in the first direction along the roller shaft 52 (i.e., the axial direction of the roller shaft 52). The roller 51 pushes the conical spring 31 of the speed changing ring 3 to rotate around the annular central shaft 32, and the conical spring 31 rolls on the surfaces of the first cone pulley 12 and the second cone pulley 22 while rotating, so that the speed changing ring 3 moves along the first direction, and the diameters of the first cone pulley 12 and the second cone pulley 22 on the path of the speed changing ring 3 rolling along the first direction are different, so that the speed reduction or acceleration of the continuously variable transmission can be realized. In the embodiment shown in fig. 1, after the shift ring 3 rolls in the direction of the X axis, as for the first cone pulley 12, since the diameter of the first cone pulley 12 in the direction of the X axis becomes large, the linear velocity of the position where it engages with the shift ring 3 increases without changing the angular velocity of rotation thereof, thereby increasing the rotational speed of the shift ring 3; in contrast, since the diameter of the second cone 22 in the direction along the X axis is smaller, the angular velocity of the second cone 22 is continuously increased even when the rotational velocity of the shift ring 3 is unchanged, and it can be seen that not only the rotational velocity of the shift ring 3 but also the rotational velocity of the second cone 22 is further increased in the direction along the X axis, thereby accelerating the rotational velocity of the output shaft 21. Conversely, the speed change ring 3 can be rolled in the direction opposite to the X-axis to slow the rotation speed of the output shaft 21.
Further, in the embodiment shown in fig. 1 and 2, the continuously variable transmission further comprises a housing 6. Wherein the power transmission mechanism, the shift ring and the shift unit are all disposed within the housing 6.
The structure of the continuously variable transmission is mainly applied to a continuously variable transmission with small torque transmission, and the speed of a power output part of a power transmission mechanism is adjusted by controlling the speed changing ring to move along a first direction through the speed changing unit, wherein the speed changing ring moves on the surface of a cone pulley (such as a first cone pulley and a second cone pulley) in a rolling mode (rolling mode of conical spring plates of the speed changing ring) in the moving process of the first direction in the speed changing process, and compared with the sliding mode adopted by a steel belt of the traditional mechanical Continuously Variable Transmission (CVT), the continuously variable transmission has the advantages of small friction resistance, capability of realizing rapid speed changing and the like. The speed-changing ring has the advantages of large contact area, small running abrasion, long service life and the like. In addition, the structure of the continuously variable transmission avoids the adoption of a complex hydraulic pressing device in the existing continuously variable transmission, so that the continuously variable transmission has the advantages of being simple in manufacture, low in cost, high in reliability and the like.
In summary, in combination with the embodiments shown in fig. 1 to 4, the continuously variable transmission provided in the embodiments of the present invention controls the shift ring to move along the first direction by the shift unit to adjust the rotation speed of the power output member of the power transmission mechanism, where in the shift process, since the shift includes a plurality of conical shrapnel capable of rotating around the annular center shaft, the shift ring moves on the surface of the cone (e.g., the first cone and the second cone) in a rolling manner during the movement in the first direction, and compared with the sliding manner adopted by the steel belt of the existing mechanical continuously variable automatic transmission (CVT) during the shift process, the continuously variable transmission has the advantages of small friction resistance, and rapid shift. The speed-changing ring has the advantages of large contact area, small running abrasion, long service life and the like. In addition, the structure of the continuously variable transmission avoids the adoption of a complex hydraulic pressing device in the existing continuously variable transmission, so that the continuously variable transmission has the advantages of being simple in manufacture, low in cost, high in reliability and the like.
While the invention has been described above in terms of preferred embodiments, it is not intended to limit the invention thereto. Those skilled in the art to which the present invention pertains will appreciate that numerous changes and modifications can be made without departing from the spirit and scope of the invention. The scope of the invention is therefore defined by the appended claims.
Claims (9)
1. A continuously variable transmission, characterized by comprising:
the power transmission mechanism at least comprises a power input part and a power output part;
a shift ring surrounding the power transmission mechanism, and the shift ring being movable back and forth in a first direction, the shift ring comprising:
an annular central shaft; and
the conical elastic pieces are arranged on the annular central shaft and can rotate around the power transmission mechanism along the annular central shaft; at least one conical spring plate is connected with the power input part, and the power input part drives the conical spring plate to rotate around the power transmission mechanism; at least one conical spring plate is connected with the power output part and drives the power output part to rotate; each conical spring piece can rotate by taking the annular central shaft as a center;
the speed changing unit at least comprises a pressing device, the pressing device is arranged on the outer side of the speed changing ring and is connected with the speed changing ring, and the pressing device controls at least one conical spring piece to roll on the surface of the power input part and/or the power output part while rotating around the annular central shaft to drive the speed changing ring to move along the first direction and adjust the rotating speed of the power output part of the power transmission mechanism.
2. The variable transmission of claim 1, wherein the shifting unit further comprises:
the speed change screw rod mechanism set up in the speed change ring outside, speed change screw rod mechanism includes:
a lead screw extending in the first direction; and
the screw rod nut is sleeved on the screw rod and can move back and forth along the screw rod in a first direction;
the speed change control mechanism is connected with the screw rod and drives the screw rod to rotate so as to control the screw rod nut to move along the screw rod in a first direction;
the compressing device is further connected with the screw-nut, and can synchronously move along with the screw-nut in the first direction so as to drive at least one conical spring piece to roll on the surface of the power input component and/or the power output component while rotating around the annular central shaft to drive the speed changing ring to move in the first direction.
3. The continuously variable transmission according to claim 2, wherein the speed change unit includes two speed change screw mechanisms, the two speed change screw mechanisms being provided on both sides of the speed change ring, respectively, and screws of the two speed change screw mechanisms being connected to the speed change control mechanism.
4. A continuously variable transmission as claimed in claim 3, in which the variator unit comprises two said hold down devices, each said hold down device comprising a roller and a roller shaft, the rollers being journalled on the roller shafts, each said roller being connected to one of the lead screw nuts and the variator ring and being movable with the lead screw nut along the roller shafts.
5. The variable transmission of claim 3, wherein each of the shift screw mechanisms further comprises a synchronizing sprocket disposed at a same end of the shift screw mechanism; the speed changing unit further comprises a toothed chain surrounding the two synchronous sprockets.
6. The variable transmission of claim 1, wherein the power input member comprises an input shaft and a first cone pulley sleeved on the input shaft, the first cone pulley being connected to the shift ring and at least driving at least one conical spring of the shift ring to rotate;
the power output part comprises an output shaft and a second cone pulley sleeved on the output shaft, the second cone pulley is connected with the speed changing ring and rotates under the driving of the speed changing ring, and the second cone pulley and the first cone pulley face opposite directions.
7. The variable transmission of claim 6, wherein the first cone pulley is the same size as the second cone pulley and the axis of the first cone pulley is parallel to the axis of the second cone pulley.
8. The variable transmission of claim 6, wherein a surface of the first cone pulley and/or the second cone pulley has grooves.
9. The variable transmission according to any one of claims 1 to 8, further comprising a housing, wherein the power transmission mechanism and the speed change unit are disposed inside the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710102302.3A CN108506447B (en) | 2017-02-24 | 2017-02-24 | Continuously variable transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710102302.3A CN108506447B (en) | 2017-02-24 | 2017-02-24 | Continuously variable transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108506447A CN108506447A (en) | 2018-09-07 |
| CN108506447B true CN108506447B (en) | 2024-04-16 |
Family
ID=63372931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710102302.3A Active CN108506447B (en) | 2017-02-24 | 2017-02-24 | Continuously variable transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108506447B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201065924Y (en) * | 2007-07-11 | 2008-05-28 | 日本电产新宝(浙江)有限公司 | Speed-changing machine |
| US7803077B1 (en) * | 2009-02-23 | 2010-09-28 | Spaude Robert W | Constant torque input infinitely variable automatic transmission |
| KR20110105025A (en) * | 2010-03-18 | 2011-09-26 | 현대 파워텍 주식회사 | Cone-ring type continuous variable transmission |
| KR20130127744A (en) * | 2012-05-15 | 2013-11-25 | 현대자동차주식회사 | Automated manual transmission for vehicle |
| CN103807394A (en) * | 2014-01-27 | 2014-05-21 | 北京理工大学 | Internal contact conical ring type continuously-variable transmission |
| CN106438906A (en) * | 2016-10-18 | 2017-02-22 | 绍兴文理学院 | Conical band type automobile continuously variable transmission |
| CN206770545U (en) * | 2017-02-24 | 2017-12-19 | 蔡有建 | A kind of buncher |
-
2017
- 2017-02-24 CN CN201710102302.3A patent/CN108506447B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201065924Y (en) * | 2007-07-11 | 2008-05-28 | 日本电产新宝(浙江)有限公司 | Speed-changing machine |
| US7803077B1 (en) * | 2009-02-23 | 2010-09-28 | Spaude Robert W | Constant torque input infinitely variable automatic transmission |
| KR20110105025A (en) * | 2010-03-18 | 2011-09-26 | 현대 파워텍 주식회사 | Cone-ring type continuous variable transmission |
| KR20130127744A (en) * | 2012-05-15 | 2013-11-25 | 현대자동차주식회사 | Automated manual transmission for vehicle |
| CN103807394A (en) * | 2014-01-27 | 2014-05-21 | 北京理工大学 | Internal contact conical ring type continuously-variable transmission |
| CN106438906A (en) * | 2016-10-18 | 2017-02-22 | 绍兴文理学院 | Conical band type automobile continuously variable transmission |
| CN206770545U (en) * | 2017-02-24 | 2017-12-19 | 蔡有建 | A kind of buncher |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108506447A (en) | 2018-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101190375B1 (en) | continuously variable transmission | |
| US20170030436A1 (en) | Continuously variable transmission | |
| CN110985636A (en) | Reducing chain ring wheel and reducing chain ring wheel transmission | |
| KR101051581B1 (en) | Cvt with effective link structure | |
| CN100383433C (en) | Dual-belt or dual-chain drive synchronizing device | |
| JP5347290B2 (en) | Power transmission chain pretension method | |
| CN108506447B (en) | Continuously variable transmission | |
| CN108533700B (en) | Continuously variable transmission | |
| CN112178140A (en) | Dislocation wheeled continuously variable transmission | |
| CN202402581U (en) | Variable-pitch-radius based star chain transmission stepless speed change device | |
| CN211852729U (en) | Reducing chain ring wheel and reducing chain ring wheel transmission | |
| CN206770535U (en) | A kind of buncher | |
| CN109555828B (en) | Rolling type continuously variable transmission | |
| CN206770545U (en) | A kind of buncher | |
| WO2011053187A1 (en) | Infinitely variable transmission, variable-speed drive, gear ratio range limiter and planetary gear | |
| CN112377584A (en) | Friction type mechanical stepless speed changer | |
| CN201083255Y (en) | Split belt wheel type belt transmission stepless variable-speed gear | |
| CN216200230U (en) | Novel stepless speed change device | |
| CN215763109U (en) | Speed changing device and gearbox | |
| CN114483898B (en) | Speed regulating device of stepless speed changer | |
| CN112747092A (en) | Diagonal connection steel chain stepless speed changing box | |
| CN201747880U (en) | Novel CVT | |
| JP5418152B2 (en) | Friction wheel type continuously variable transmission | |
| CN113819201A (en) | Novel stepless speed change device | |
| JP4978557B2 (en) | Friction wheel type continuously variable transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240419 Address after: 201800 unit 602, building 2, Lane 38, Zhangma Road, Jiading District, Shanghai Patentee after: SHANGHAI JIANLIN AUTOMOTIVE TECHNOLOGY CO.,LTD. Country or region after: China Address before: 201800 unit 602, building 2, Lane 38, Zhangma Road, Jiading District, Shanghai Patentee before: Cai Youjian Country or region before: China |