CN108533700A - A kind of contiuously variable transmission - Google Patents
A kind of contiuously variable transmission Download PDFInfo
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- CN108533700A CN108533700A CN201710118090.8A CN201710118090A CN108533700A CN 108533700 A CN108533700 A CN 108533700A CN 201710118090 A CN201710118090 A CN 201710118090A CN 108533700 A CN108533700 A CN 108533700A
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- Prior art keywords
- speed change
- speed
- ring
- planet
- variable transmission
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
- F16H15/48—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members with members having orbital motion
- F16H15/50—Gearings providing a continuous range of gear ratios
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/76—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with an orbital gear having teeth formed or arranged for obtaining multiple gear ratios, e.g. nearly infinitely variable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/04—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism
- F16H63/06—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism the final output mechanism having an indefinite number of positions
- F16H63/067—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism the final output mechanism having an indefinite number of positions mechanical actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H2061/2884—Screw-nut devices
Abstract
The present invention discloses a kind of contiuously variable transmission, and the contiuously variable transmission includes：Planetary power transmission mechanism, the planetary power transmission mechanism include at least：One power input part；With a power output part, the power output part includes an output shaft and the planet slave unit of the output shaft rotation that at least one is connected with the output shaft, drives, the planet slave unit is set to the outside of the power input part, and can be rotated around the power input part under the driving of the power input part；Speed change ring, around the connection planet slave unit, and the speed change ring can move back and forth in a first direction；Variable-speed unit, the variable-speed unit includes at least a pressing device, the pressing device is set on the outside of the speed change ring, and is fixedly connected with the speed change ring, and the speed change ring is driven to move back and forth, adjust the rotating speed of the power output part of the planetary power transmission mechanism in the first direction.
Description
Technical field
The present invention relates to a kind of mechanical device contiuously variable transmissions can be applied to automobile and other passing powers.
Background technology
Automatic transmission mainly has electric-controlled mechanical automatic at present as automobile and the core component of other mechanical driving devices
Speed changer (AMT), hydraulic automatic speed variator (AT), double-clutch automatic gearbox (DCT), mechanical stepless automatic speed changer (CVT)
Four major class.Wherein, mechanical stepless automatic speed changer (CVT) is due to continuously variable, and power is sustainable in speed-change process
The features such as output, can make engine speed be maintained at most economical working region, realize automobile or similar under the same conditions
Oil consumption is minimum in type mechanical device, it is the gentlest and other effects to run.In addition, mechanical stepless automatic speed changer (CVT) also have than
Conventional transmissions are simple in structure, number of components is few, volume smaller, the advantages that weight is lighter.
Mechanical stepless automatic speed changer (CVT) is in addition to the belt and chain type of mainstream, and there is also various different forms, such as conical ring
Formula, roller type etc., power are transmitted between active cone pulley, passive cone pulley or cone disk by becket or metal dish and are carried out.But
Be these forms mechanical stepless automatic speed changer due at power transmission contact area it is smaller, stress is more concentrated, and can be transmitted
Peak torque and speed change stability are restricted, and are only applied in fraction vehicle at present.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of contiuously variable transmissions.
A kind of contiuously variable transmission is provided according to an aspect of the present invention, and the contiuously variable transmission includes：Planetary power passes
Transfer mechanism, the planetary power transmission mechanism include at least：One power input part；With a power output part, the power
Output block includes that an output shaft and at least one are connected with the output shaft, drive the planet of the output shaft rotation driven
Component, the planet slave unit are set to the outside of the power input part, and can be in the drive of the power input part
It is dynamic lower around power input part rotation；Speed change ring, around connecting the planet slave unit, and the speed change ring can be
Move back and forth on first direction；Variable-speed unit, the variable-speed unit include at least a pressing device, and the pressing device is set to
It on the outside of the speed change ring, and is fixedly connected with the speed change ring, the speed change ring is driven to move back and forth in the first direction, adjust
Save the rotating speed of the power output part of the planetary power transmission mechanism.
Preferably, the power input part includes an input shaft and the center sun tooth being sheathed on the input shaft
Wheel；The power output part further includes a planet carrier with the output shaft, wherein the central sun gear is set to
In the planet carrier；Wherein, the planet slave unit is set to the outside of the central sun gear, with the planet carrier phase
Connection, and be connected with the central sun gear and the speed change ring, the planet slave unit can be in the center sun
Around the center rotating of the speed change ring under the rotation driving of gear, to drive the output shaft to rotate.
Preferably, the planet slave unit includes：The driven planetary gear being meshed with the central sun gear, institute
Driven planetary gear is stated to be set in the planet carrier；Planetary cone wheel that is coaxial with the driven planetary gear and being fixed to each other,
The planetary cone wheel is connected with the speed change ring；Planetary gear shaft is fixed with the driven planetary gear, planetary cone wheel and is connected
It connects, and the planetary gear shaft also extends through the driven planetary gear, planetary cone wheel is connected with the planet carrier.
Preferably, the input shaft is coaxially disposed with the output shaft.
Preferably, the power output part includes multiple planet slave units, wherein multiple planets are driven
Component is around the outside for being set to the power input part.
Preferably, the speed change ring includes：One ring center axis；And multiple conical shrapnels, it is set to the ring-type
On central shaft, wherein each conical shrapnel can rotate centered on the ring center axis；Wherein, the compression
While at least one conical shrapnel of device control rotates centered on by the ring center axis, the planet from
Dynamic component surface scrolls, to drive the speed change ring to be moved along the first direction.
Preferably, the variable-speed unit further includes：Speed change screw body is set on the outside of the pressing device, the change
Fast screw body includes：Lead screw, the lead screw extend along the first direction；And feed screw nut, it is sheathed on the lead screw, and
Can in a first direction it move back and forth along the lead screw；Wherein, the pressing device is connect with the feed screw nut, the compression
Device can be with feed screw nut synchronizing moving in said first direction, to drive the speed change ring in said first direction
It is mobile；Speed changing control mechanism is connected with the lead screw, drives the lead screw to rotate, to control the feed screw nut along described
Lead screw moves in a first direction.
Preferably, the variable-speed unit includes multiple speed change screw bodies, and multiple speed change screw bodies are surround
It is set to the outside of the pressing device, the lead screw of multiple speed change screw bodies is all connected with the speed changing control mechanism.
Preferably, each speed change screw body further includes a synchronous sprocket wheel, and the synchronous sprocket wheel is set to the change
The same end of fast screw body；The variable-speed unit further includes the silent chain of each synchronous sprocket wheel of a connection.
Preferably, the pressing device is equipped with the card extended along the first direction towards a side surface of the speed change ring
The conical shrapnel of slot, the speed change ring is stuck in the card slot.
Preferably, the pressing device surround the speed change ring in sleeve-shaped.
Preferably, the contiuously variable transmission further includes a shell, the planetary power transmission mechanism and the variable-speed unit
It is set in the shell.
Compared with the prior art, contiuously variable transmission provided in an embodiment of the present invention by power input part by driving power
The planet slave unit ring of output block rotates around it, and drives the output shaft of power output part to rotate with this, the transmission torque
Transfer mode can effectively increase power transmission, meet large torque duty requirements.
It is moved along first direction to adjust power transmission in addition, the contiuously variable transmission also controls speed change ring by variable-speed unit
The rotating speed of the power output part of mechanism realizes the speed change of contiuously variable transmission, wherein in speed-change process, since speed change includes multiple
The conical shrapnel that can be rotated centered on ring center axis, therefore, speed change ring in a first direction move during with rolling
Dynamic form moves on planetary cone wheel surface, compares the steel band of existing mechanical stepless automatic speed changer (CVT) in speed-change process
Middle use slideably for, have many advantages, such as that frictional resistance is smaller and can realize quick speed change.Also, in conjunction with the planet
After the structure of cone pulley, which deforms in the case where pressing device and planetary cone wheel squeeze jointly, increases and planetary cone wheel contact surface
Product, therefore also have many advantages, such as that contact area is big, service wear is small, last a long time.The structure of the contiuously variable transmission also avoids
Using hydraulic compressing device complicated in existing contiuously variable transmission, to relatively simple with manufacturing, cost is relatively low, reliability compared with
The advantages that high.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the cross section structure schematic diagram of the contiuously variable transmission of the first embodiment of the present invention；
Fig. 2 is the cross section structure schematic diagram at A-A in Fig. 1；
Fig. 3 is the partial enlarged view at B in Fig. 2；
Fig. 4 is fortune of the conical shrapnel of contiuously variable transmission speed change ring in speed-change process of the present invention on planetary cone wheel
Dynamic track schematic diagram.
Reference numeral
1 power input part
11 input shafts
13 central sun gears
2 power output parts
21 output shafts
23 planet carriers
25 planet slave units
251 driven planetary gears
252 planetary cone wheels
253 planetary gear shafts
3 speed change rings
31 conical shrapnels
32 ring center axis
4 speed change screw bodies
41 lead screws
42 feed screw nuts
43 synchronous sprocket wheels
5 pressing devices
53 axial card slots
6 shells
Specific implementation mode
At least all there is the maximum that following two problems limit speed changer in existing mechanical stepless automatic speed changer (CVT)
Transmit torque：
1, functional contact face is limited, if if the normal pressure for generating frictional force to easily cause very much mechanism stress greatly excessive
Cause to fail；
2, the frictional force of passing power and speed change need the frictional resistance overcome in same contact surface, and are that sliding rubs
It wipes, speed change will be made to can not be successfully progress if improving the frictional force of passing power simply.
Therefore, if existing mechanical stepless automatic speed changer is applied to high torque and with higher motion performance requirement
It can at least be had the following problems in vehicle or instrument：
1) transmission belt is easily damaged, therefore, more demanding to its material；
2) speed changer can not bear larger load；
3) transmission belt cannot be fast moved, therefore, it is impossible to meet the requirement of the quick speed change of vehicle；
4) manufacturing process of speed changer is complicated.
For above-mentioned factor, the present invention provides a kind of contiuously variable transmission.Purport design according to the present invention, the stepless change
Fast device includes planetary power transmission mechanism, and the planetary power transmission mechanism includes at least：One power input part；With a power
Output block, the power output part include an output shaft and at least one be connected with the output shaft, drive it is described defeated
The planet slave unit of shaft rotation, the planet slave unit are set to the outside of the power input part, and can be in institute
It states and is rotated around the power input part under the driving of power input part；Speed change ring, around the connection planet follower
Part, and the speed change ring can move back and forth in a first direction；Variable-speed unit, the variable-speed unit include at least one and compress dress
It sets, the pressing device is set on the outside of the speed change ring, and is fixedly connected with the speed change ring, drives the speed change ring in institute
State the rotating speed that first direction moves back and forth, adjusts the power output part of the planetary power transmission mechanism.
The technology contents of the present invention are described further with reference to the accompanying drawings and examples.
Please also refer to Fig. 1 to Fig. 4, which respectively show the signals of the cross section structure of the contiuously variable transmission of the embodiment of the present invention
The movement locus signal of the conical shrapnel of speed change ring in the structural schematic diagram and speed-change process of figure, speed change ring and pressing device
Figure.Wherein, Fig. 2 is the cross section structure schematic diagram at A-A in Fig. 1；Fig. 3 is the partial enlarged view at B in Fig. 2.The present invention's
In preferred embodiment, the contiuously variable transmission includes mainly planetary power transmission mechanism, speed change ring and variable-speed unit.
The planetary power transmission mechanism includes at least a power input part and a power output part.The power is defeated
It includes an output shaft and the planet follower for the output shaft rotation that at least one is connected with the output shaft, drives to go out component
Part, the planet slave unit are set to the outside of the power input part, and can be in the driving of the power input part
It is rotated around the power input part down.
Specifically, in Fig. 1 and embodiment shown in Fig. 2, power input part 1 includes an input shaft 11 and is arranged
In the central sun gear 13 on input shaft 11.Central sun gear 13 is fixed to each other with input shaft 11, and can be with input shaft 11
Synchronous rotary (rotation herein refers to the rotation that input shaft 11 carries out under the driving of the equipment such as engine).
Power output part 2 includes planet carrier 23 and slave unit 25 with an output shaft 21.Reality shown in Fig. 1
It applies in example, output shaft 21 is located at the left end of planet carrier 23, and preferably, and output shaft 21 is coaxially disposed with input shaft 11.Center is too
Positive gear 13 is set in planet carrier 23.
Planet slave unit 25 is set to the outside of central sun gear 13.Planet slave unit 25 and planet carrier 23, in
Heart sun gear 13 and speed change ring 3 are connected.In a preferred embodiment of the invention, power output part 2 may include more
A planet slave unit 25.Wherein, multiple planet slave units 25 are around the outside of setting and power input part 1.In Fig. 1 and
In embodiment shown in Fig. 2, power output part 2 includes two slave units 25, and two planet slave units 25 are with respect to planet
The ring center axis of frame 23 is symmetrical.It should be noted that, although with tool, there are two opposite in Fig. 1 and embodiment illustrated in fig. 2
It is illustrated for the power output part 2 of the symmetrical slave unit 25 of ring center axis of planet carrier 23, but and unlimited
In this, in other embodiments of the invention, the quantity of planet slave unit can need to carry out according to actual torque
Adjustment, for example, tool there are three or four etc., multiple planet slave units transmit torque simultaneously, effectively increased with this power pass
It passs.Also, multiple planet slave units are not necessarily symmetrically arranged two-by-two, and it will not be described here.
Specifically, planet slave unit 25 includes driven planetary gear 251, planetary cone wheel 252 and planetary gear shaft
253.Wherein, driven planetary gear 251 is set in planet carrier 23 and is meshed with central sun gear 13.Planetary cone wheel 252
It is coaxially disposed and is mutually permanently connected between driven planetary gear 251, the two can be integrally formed.Preferably, planet is bored
Taking turns 252 surfaces has groove, and speed change ring slipping phenomenon is reduced with this.Planetary gear shaft 253 and the driven planetary gear 251,
Planetary cone wheel 252 is coaxial and is mutually permanently connected, and driven planetary gear 251, planetary cone wheel 252 and planet carrier 23 is passed through to connect
It connects, and can the rotation on planet carrier 23.
Speed change ring 3 is around the planet slave unit, and speed change ring 3 (X-direction in Fig. 1) can come up in a first direction
Return is dynamic.As shown in Figures 2 and 3, speed change ring 3 can be a steel loop conspired to create by multiple conical shrapnels.Specifically, speed change
Ring 3 includes a ring center axis 32 and multiple conical shrapnels 31.Multiple cone shrapnels 31 are set to ring center axis 32
On.Wherein, while each conical shrapnel 31 can rotate centered on by ring center axis 32, in planetary cone wheel 252
Surface scrolls make speed change ring 3 that rolling can be used during being moved along first direction, realizing continuously variable transmission in turn
Form, compared to existing mechanical stepless automatic speed changer (CVT) steel band used in speed-change process slideably for,
Have many advantages, such as that frictional resistance is smaller and can realize quick speed change.
In Fig. 1 and embodiment shown in Fig. 2, speed change ring 3 is connected with planetary cone wheel 252.It should be noted that herein
The connection of planetary cone wheel 252 and speed change ring 3 can refer to the intermeshing between planetary cone wheel 252 and speed change ring 3, can also be only
Simply mean to being bonded to each other between planetary cone wheel 252 and speed change ring 3.In turn, when driven planetary gear 251 is in central sun gear
After being rotated under 13 driving, planet slave unit 25 can be made around the center rotating of speed change ring 3, drive planet carrier 23 and its output shaft
21 rotations, realize the output of power.Although in addition, in Fig. 1 to Fig. 4 illustrated embodiment of the present invention with include ring center axis 32 with
And illustrated for the speed change ring of multiple conical shrapnels 31, but be not limited thereto, the contiuously variable transmission may be implemented
The effect of speed change it is technical, can also be existing any speed change ring, it will not be described here.
The variable-speed unit control speed change ring is moved along first direction to adjust the rotating speed of power output part.The speed change
Unit includes speed change screw body 4, pressing device 5 and speed changing control mechanism.It is described in Fig. 1 and embodiment shown in Fig. 2
Variable-speed unit includes two speed change screw bodies 4.Wherein, two speed change screw bodies 4 are respectively arranged at the both sides of speed change ring 3
(being the both sides up and down for being set to speed change ring 3 in Fig. 1 and Fig. 2), each speed change screw body 4 is all connected with a speed Control
Mechanism.It should be noted that, although having the variable-speed unit there are two speed change screw body 4 in Fig. 1 and embodiment shown in Fig. 2
For illustrate, but it is not limited to this, and in other embodiments of the invention, the quantity of speed change screw body can be according to reality
The needs on border are adjusted, for example, tool there are three or four speed change screw bodies, it will not be described here.
Since in this embodiment, the structure of two speed change screw bodies 4 is identical, therefore, to be set to speed change ring in Fig. 1
It is illustrated for the speed change screw body 4 of 3 tops.Specifically, speed change screw body 4 is set to the outside of speed change ring 3, becomes
Fast screw body 4 includes lead screw 41 and feed screw nut 42.As shown in Figure 1, lead screw 41 is along first direction (X-direction in Fig. 1)
Extend.Feed screw nut 42 is sheathed on lead screw 41, and can in a first direction move back and forth along lead screw 41.Wherein, feed screw nut
42 along the movement of lead screw 41 refer in 41 rotary course of lead screw, and the screw thread along 41 surface of lead screw is moved.
Pressing device 5 is set to 3 outside of speed change ring, is connect with feed screw nut 42 and speed change ring 3.Pressing device 5 can be with silk
Synchronizing moving adjusts the row to stem nut 42 to drive the speed change ring to move in said first direction in a first direction
The rotating speed of the power output part of star power transmission mechanism.In addition, pressing device 5 can also be to the conical shrapnel of speed change ring 3
31 play the role of crimp, and speed change ring 3 is made to be bonded planetary cone wheel 252 in the form of elliptoid, are bored with planet with increasing it
Contact area between wheel 252, avoids stress concentration, has skidded, and in turn, realizes that effective power transmits.Specifically, exist
In Fig. 1 to embodiment shown in Fig. 3, pressing device 5 is set to the outside of speed change ring 3 in sleeve-shaped.Also, in this embodiment
In, the feed screw nut 42 of pressing device 5 and two speed change screw bodies 4 is integrally formed, therefore can synchronize and move with feed screw nut 42
It is dynamic.At least one conical shrapnel of pressing device 5 control modes such as (such as) pushing speed change ring 3 is being with ring center axis 32
While center rotating, in the surface scrolls of planetary cone wheel 252, to drive speed change ring 3 to move back and forth in a first direction, in addition,
In Fig. 2 and embodiment shown in Fig. 3, pressing device 5 is equipped with towards a side surface of speed change ring 3 along first direction (X in Fig. 1
Axis direction) card slot 53 that extends, the conical shrapnel 31 of speed change ring 3 is stuck in card slot 53.Preferably, the quantity of card slot 53 and change
31 quantity of conical shrapnel of fast ring 3 is identical.Card slot 53 can prevent speed change ring 3 from rotating (rotation), in turn, realize planet cone
Rotation (the revolving round the sun around the center of speed change ring 3) in speed change ring 3 of wheel 252.
The speed changing control mechanism (being not shown in Fig. 1 and Fig. 2) is connected with lead screw 41, and driving lead screw 41 rotates, with this
Control feed screw nut 42 moves in a first direction along lead screw 41.
Further, in Fig. 1 and embodiment shown in Fig. 2, each speed change screw body 4 further includes a synchronous sprocket wheel
43.Two synchronous sprocket wheels 43 may be contained within the same end of speed change screw body 4.Variable-speed unit further includes one around two synchronous chains
The silent chain (being not shown in Fig. 1 and Fig. 2) of wheel 43.The rotating speed of the two can be made to keep one after two synchronous sprocket wheels 43 of tooth form chain link
It causes, in turn, the rotating speed of two lead screws 41 can be made to be consistent, compression can be made to fill under the rotating speed unanimous circumstances of two lead screws 41
It sets 5 to move linearly in an axial direction, to ensure that the stability in 3 moving process of speed change ring.It should be noted that the present invention's
In a little embodiments, pressing device can be that straight-tube shape can also be the cone cylinder shape with certain taper, for example, in input shaft 11 1
Side, it is illustrated that right side, diameter becomes smaller, and to deform bigger when realizing that speed change ring 3 runs to the region, makes itself and planetary cone wheel
(i.e. smaller one end of size) contact area is skidded, it will not be described here also with regard to bigger to reduce speed change ring 3 at 252 small ends.
Further, in conjunction with shown in above-mentioned Fig. 1 to Fig. 3, contiuously variable transmission of the invention during power transmission, in
Heart sun gear 13 drives driven planetary gear 251 to rotate (rotation) afterwards with 11 synchronous rotary of input shaft (rotation), and planet is made to bore
Wheel 252, which also synchronizes, to be rotated.Since planetary cone wheel 252 is connected with speed change ring 3, and speed change ring 3 does not rotate and (is compacted dress
Set 5 fixations), it therefore, can be in speed change ring 3 around the center of speed change ring 3 during planetary cone wheel 252 rotates (rotation)
It rotates (revolution), in turn, because planetary gear shaft 253 passes through planet carrier 23, so can drive on planet carrier 23 and planet carrier 23
Output shaft 21 rotated (rotation), realize the transmission of power.
Further, embodiment combining Figure 1 and Figure 2, the case where the contiuously variable transmission needs to carry out speed change
Under, first by 41 axial-rotation of lead screw (i.e. rotation) of speed changing control mechanism driving speed change screw body 4, lead screw 41 can after rotating
So that feed screw nut 42 moves up along first party.Since pressing device 5 and feed screw nut 42 are integrally formed, compress dress
Setting 5, equally with feed screw nut 42, (X-direction in Fig. 1) is mobile in a first direction.In turn, pressing device 5 pushes speed change ring 3 to make change
The conical shrapnel 31 of fast ring 3 is rolled along first direction on the surface of planetary cone wheel 252.In order to clearly to speed change ring
The running orbit of conical shrapnel illustrates, and Fig. 4 shows the contiuously variable transmission of the invention speed change ring in speed-change process
Movement locus schematic diagram of the conical shrapnel on planetary cone wheel.Wherein, Fig. 4 is schematically with a circular cone on speed change ring 3
It is illustrated for shape shrapnel 31.Specifically, as shown in figure 4, when pressing device 5 is along first direction (X-direction in such as Fig. 4)
When pushing speed change ring 3, the conical shrapnel 31 of speed change ring 3 is rotated centered on ring center axis 32 (as shown in Fig. 4 arrows)
Meanwhile along 252 surface scrolls of planetary cone wheel, in turn, keep speed change ring 3 mobile along first direction (X-direction in such as Fig. 4), therefore,
The contiuously variable transmission during speed change, its speed change ring using rolling form, compared to existing mechanical stepless it is automatic
The steel band of speed changer (CVT) used in speed-change process slideably for, have frictional resistance it is smaller and can realize quickly
The advantages that speed change.
In turn, due to planetary cone wheel 252, in speed change ring 3, the diameter along the path that first direction is rolled is different,
The deceleration or acceleration of contiuously variable transmission may be implemented.In the embodiment shown in fig. 1, due to the direction upper planet cone along X-axis
The diameter of wheel 252 gradually increases, and the angular speed of two planetary cone wheels 252 is constant, planetary cone wheel 252 and 3 phase of speed change ring
The linear velocity of the position of engagement increases because of the increase of its diameter, therefore, rotation (revolution) of the planetary cone wheel 252 in speed change ring 3
Speed accelerate, by planetary gear shaft 253 push planet carrier 23 accelerate rotation, and then realize output shaft 21 accelerate output turn
Speed.On the contrary, speed change ring 3 can make the rotating speed of output shaft 21 slack-off after being rolled along the direction opposite with X-axis.
Further, in Fig. 1 and embodiment shown in Fig. 2, the contiuously variable transmission further includes a shell 6.Wherein, row
Star power transmission mechanism, speed change ring and variable-speed unit may be contained in shell 6.
In conclusion the embodiment in conjunction with shown in above-mentioned Fig. 1 to Fig. 4, in contiuously variable transmission provided in an embodiment of the present invention
By driving the planet slave unit ring of power output part to rotate around it by power input part, power output portion is driven with this
The output shaft of part rotates, and the transfer mode of the transmission torque can effectively increase power transmission, meet large torque duty requirements.
It is moved along first direction to adjust power transmission in addition, the contiuously variable transmission also controls speed change ring by variable-speed unit
The rotating speed of the power output part of mechanism realizes the speed change of contiuously variable transmission, wherein in speed-change process, since speed change includes multiple
The conical shrapnel that can be rotated centered on ring center axis, therefore, speed change ring in a first direction move during with rolling
Dynamic form moves on planetary cone wheel surface, compares the steel band of existing mechanical stepless automatic speed changer (CVT) in speed-change process
Middle use slideably for, have many advantages, such as that frictional resistance is smaller and can realize quick speed change.Also, in conjunction with the planet
After the structure of cone pulley, not only multiple planetary cone wheels can transmit torque simultaneously, and the speed change ring is in pressing device and planetary cone wheel
It is common to squeeze lower deformation, increase with planetary cone wheel contact area, therefore also have contact area is big, service wear is small, the service life compared with
The advantages that long.The structure of the contiuously variable transmission, which also avoids, uses hydraulic compressing device complicated in existing contiuously variable transmission, from
And with manufacturing relatively simple, the advantages that cost is relatively low, and reliability is higher.
Although the present invention is disclosed as above with preferred embodiment, it is not limited to the present invention.Belonging to the present invention
Those skilled in the art, without departing from the spirit and scope of the present invention, when various change and modification can be made.Therefore,
Protection scope of the present invention is subject to the range defined depending on claims.
Claims (12)
1. a kind of contiuously variable transmission, which is characterized in that the contiuously variable transmission includes：
Planetary power transmission mechanism, the planetary power transmission mechanism include at least：
One power input part；With
One power output part, the power output part include an output shaft and at least one be connected with the output shaft,
The planet slave unit of the output shaft rotation, the planet slave unit is driven to be set to the outer of the power input part
Side, and can be rotated around the power input part under the driving of the power input part；
Speed change ring, around the connection planet slave unit, and the speed change ring can move back and forth in a first direction；
Variable-speed unit, the variable-speed unit include at least a pressing device, and the pressing device is set on the outside of the speed change ring,
And be fixedly connected with the speed change ring, drive the speed change ring to move back and forth in the first direction, adjust the planetary power
The rotating speed of the power output part of transmission mechanism.
2. contiuously variable transmission according to claim 1, which is characterized in that the power input part include an input shaft with
And it is sheathed on the central sun gear on the input shaft；
The power output part further includes a planet carrier with the output shaft, and the central sun gear is set to described
In planet carrier；
Wherein, the planet slave unit is set to the outside of the central sun gear, is connected with the planet carrier, and with
The central sun gear is connected with the speed change ring, and the planet slave unit can be in the rotation of the central sun gear
Around the center rotating of the speed change ring under driving, to drive the output shaft to rotate.
3. contiuously variable transmission according to claim 2, which is characterized in that the planet slave unit includes：
The driven planetary gear being meshed with the central sun gear, the driven planetary gear are set to the planet carrier
It is interior；
Planetary cone wheel that is coaxial with the driven planetary gear and being fixed to each other, the planetary cone wheel are connected with the speed change ring
It connects；
Planetary gear shaft is fixedly connected with the driven planetary gear, planetary cone wheel, and the planetary gear shaft also extend through it is described
Driven planetary gear, planetary cone wheel are connected with the planet carrier.
4. contiuously variable transmission according to claim 2, which is characterized in that the input shaft is coaxially set with the output shaft
It sets.
5. contiuously variable transmission according to claim 1, which is characterized in that the power output part includes multiple rows
Star slave unit, wherein multiple planet slave units are around the outside for being set to the power input part.
6. contiuously variable transmission according to claim 1, which is characterized in that the speed change ring includes：
One ring center axis；And
Multiple cone shrapnels, are set on the ring center axis, wherein each conical shrapnel can the ring
It is rotated centered on shape central shaft；
Wherein, the pressing device controls what at least one conical shrapnel rotated centered on by the ring center axis
Simultaneously, in the planet slave unit surface scrolls, to drive the speed change ring to be moved along the first direction.
7. contiuously variable transmission according to claim 1, which is characterized in that the variable-speed unit further includes：
Speed change screw body, is set on the outside of the pressing device, and the speed change screw body includes：
Lead screw, the lead screw extend along the first direction；With
Feed screw nut is sheathed on the lead screw, and can in a first direction move back and forth along the lead screw；
Wherein, the pressing device is connect with the feed screw nut, and the pressing device can be with the feed screw nut described
Synchronizing moving on one direction, to drive the speed change ring to move in said first direction；
Speed changing control mechanism is connected with the lead screw, drives the lead screw to rotate, to control the feed screw nut along the silk
Bar moves in a first direction.
8. contiuously variable transmission according to claim 7, which is characterized in that the variable-speed unit includes multiple speed change silks
Linkage, multiple speed change screw bodies are around the outside for being set to the pressing device, multiple speed change screw bodies
Lead screw be all connected with the speed changing control mechanism.
9. contiuously variable transmission according to claim 8, which is characterized in that each speed change screw body further includes together
Sprocket wheel is walked, the synchronous sprocket wheel is set to the same end of the speed change screw body；The variable-speed unit further includes that a connection is every
The silent chain of a synchronous sprocket wheel.
10. contiuously variable transmission according to claim 1, which is characterized in that the pressing device is towards the speed change ring
One side surface is equipped with the card slot extended along the first direction, and the conical shrapnel of the speed change ring is stuck in the card slot.
11. contiuously variable transmission according to claim 1, which is characterized in that the pressing device is in sleeve-shaped around described
Speed change ring.
12. according to the contiuously variable transmission described in claim 1 to 11, which is characterized in that the contiuously variable transmission further includes a shell
Body, the planetary power transmission mechanism and the variable-speed unit are set in the shell.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710118090.8A CN108533700A (en) | 2017-03-01 | 2017-03-01 | A kind of contiuously variable transmission |
| DE112018001076.7T DE112018001076B4 (en) | 2017-03-01 | 2018-02-28 | Infinitely variable friction gear with cone planets |
| PCT/CN2018/077489 WO2018157806A1 (en) | 2017-03-01 | 2018-02-28 | Continuously variable transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710118090.8A CN108533700A (en) | 2017-03-01 | 2017-03-01 | A kind of contiuously variable transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108533700A true CN108533700A (en) | 2018-09-14 |
Family
ID=63369750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710118090.8A Pending CN108533700A (en) | 2017-03-01 | 2017-03-01 | A kind of contiuously variable transmission |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN108533700A (en) |
| DE (1) | DE112018001076B4 (en) |
| WO (1) | WO2018157806A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332601A (en) * | 2020-10-20 | 2021-02-05 | 赵泽碧 | Transmission real-time control piece |
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| DE102016109551A1 (en) | 2016-05-24 | 2017-11-30 | Volkswagen Aktiengesellschaft | Stepped planetary gear |
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2017
- 2017-03-01 CN CN201710118090.8A patent/CN108533700A/en active Pending
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2018
- 2018-02-28 WO PCT/CN2018/077489 patent/WO2018157806A1/en active Application Filing
- 2018-02-28 DE DE112018001076.7T patent/DE112018001076B4/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN101283201A (en) * | 2005-09-06 | 2008-10-08 | 株式会社三国 | Planetary roller transmission and vehicle having the same |
| CN102230522A (en) * | 2011-04-13 | 2011-11-02 | 北京理工大学 | Automotive double-cone pulley continuously variable transmission |
| CN102661365A (en) * | 2012-04-05 | 2012-09-12 | 中北大学 | Tooth number variable gear stepless transmission |
| CN103807394A (en) * | 2014-01-27 | 2014-05-21 | 北京理工大学 | Internal contact conical ring type continuously-variable transmission |
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| CN206770535U (en) * | 2017-03-01 | 2017-12-19 | 蔡有建 | A kind of buncher |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112018001076T5 (en) | 2019-12-24 |
| WO2018157806A1 (en) | 2018-09-07 |
| DE112018001076B4 (en) | 2022-07-14 |
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