CN102927225B - Stepless speed changing mechanism and automobile - Google Patents
Stepless speed changing mechanism and automobile Download PDFInfo
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- CN102927225B CN102927225B CN201110228331.7A CN201110228331A CN102927225B CN 102927225 B CN102927225 B CN 102927225B CN 201110228331 A CN201110228331 A CN 201110228331A CN 102927225 B CN102927225 B CN 102927225B
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- speed change
- change roller
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Abstract
The invention discloses a kind of stepless speed changing mechanism and automobile, comprise driving wheel disc arranged in parallel and pressure adjusting wheel disc, drive between wheel disc and pressure adjusting wheel disc and have at least one speed change roller, the axis being parallel of speed change roller is in driving wheel disc and pointing to the axis driving wheel disc; Drive the surface of contact of wheel disc, pressure adjusting wheel disc and speed change roller to have friction layer, speed change roller has position regulating device, can regulate the distance of speed change roller center to driving wheel disk center; Pressure adjusting wheel disc is provided with pressure regulator, regulates pressure adjusting wheel disc to speed change roller applied pressure size.Stepless speed changing mechanism provided by the invention, can realize stepless change and the ability of raising moment of torsion transmission.
Description
Technical field
The present invention relates to mechanical transmissioning technology, especially relate to a kind of stepless speed changing mechanism.
Background technique
Stepless speed changing mechanism can realize stepless change and the transmission of rotating speed and moment of torsion.The velocity ratio of stepless speed changing mechanism is continually varying, and stepless speed changing mechanism is simpler than the structure of traditional automatic transmission, and volume is less, mainly brings by driven wheel and transmission the stepless change realizing velocity ratio.
Existing stepless speed changing mechanism adopts the ratchet of driving belt and variable groove width to carry out transmission of power, namely when ratchet change groove width, the contact radius of corresponding change driving wheel and follower upper driving band carries out speed change, and driving belt generally adopts rubber tape, metal tape and metal chain etc.The shortcoming of existing stepless speed changing mechanism is that driving belt is easy to damage, and can not bear larger load, and can only limit the use of at low-power and low moment of torsion automobile, application area is little.
Summary of the invention
The invention provides a kind of stepless speed changing mechanism and automobile, in order to solve defect of the prior art, can stepless change be realized and the ability of raising stepless speed changing mechanism moment of torsion transmission.
The invention provides a kind of stepless speed changing mechanism, comprise driving wheel disc arranged in parallel and pressure adjusting wheel disc, have at least one speed change roller between described driving wheel disc and pressure adjusting wheel disc, the axis being parallel of described speed change roller is in described driving wheel disc and point to the axis of described driving wheel disc;
The surface of contact of described driving wheel disc, pressure adjusting wheel disc and speed change roller has friction layer, and described speed change roller has position regulating device, can regulate the distance of described speed change roller center to described driving wheel disk center;
Described pressure adjusting wheel disc is provided with pressure regulator, regulates described pressure adjusting wheel disc to described speed change roller applied pressure size.
Present invention also offers this automobile of a kind of automobile and stepless speed changing mechanism in summary of the invention is installed, by described speed change roller output speed and moment of torsion.
Stepless speed changing mechanism provided by the invention and automobile, drive wheel disc to drive speed change roller to rotate by stiction, position regulating device regulates the distance of speed change roller center to driving wheel disk center continuously, and then realizes continuous stepless adjustment velocity ratio.And, due to pressure adjusting wheel disc being provided with pressure regulator, can according to duty requirements, regulate pressure adjusting wheel disc to apply the pressure of speed change roller by pressure regulator, when transmitting torque, increase the frictional force driven between wheel disc and speed change roller, thus raising torque-transfer capability, when speed change, reduce to drive the frictional force between wheel disc and speed change roller, be more conducive to mechanism's speed change.
Accompanying drawing explanation
The schematic diagram of the stepless speed changing mechanism that Fig. 1 provides for first embodiment of the invention;
The schematic diagram of a kind of working state of the stepless speed changing mechanism that Fig. 2 provides for second embodiment of the invention;
The schematic diagram of the another kind of working state of the stepless speed changing mechanism that Fig. 3 provides for second embodiment of the invention.
Reference character:
1-drives wheel disc; 11-first friction layer; 12-input shaft;
2-drive bevel gear; 3-pressure adjusting wheel disc; 31-second friction layer;
4-speed change roller; 5-position regulating device; 61-clutch shaft bearing group;
62-second bearing pack; 71-speed cone gear; 72-output bevel gear is taken turns;
73-assists bevel gear; 8-pressure regulator; 81-pressure transducer.
Embodiment
For making the object of the embodiment of the present invention, technological scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
With reference to the schematic diagram of the stepless speed changing mechanism that Fig. 1, Fig. 1 provide for first embodiment of the invention.
In the first embodiment of the present invention, stepless speed changing mechanism comprises driving wheel disc 1 and pressure adjusting wheel disc 3, drive between wheel disc 1 and pressure adjusting wheel disc 3 and have a speed change roller 4, the axis being parallel of speed change roller 4 is in driving wheel disc 1 and pointing to the axis driving wheel disc 1.
Drive the surface of contact of wheel disc 1, pressure adjusting wheel disc 3 and speed change roller 4 to have friction layer, speed change roller 4 has position regulating device 5, and speed change roller 4 axial centre can be regulated to the distance driving wheel disc 1 axial centre.
The outside of pressure adjusting wheel disc 3 has pressure regulator 8, regulates pressure adjusting wheel disc 3 pairs of speed change roller 4 applied pressure sizes.
Particularly, in the present embodiment, driving the surface that wheel disc 1 is relative with pressure adjusting wheel disc 3, the surface namely contacted with speed change roller 4 respectively has the first friction layer 11 and the second friction layer 31 respectively, correspondingly, speed change roller 4 has the 3rd friction layer 41 with the outer surface driving wheel disc 1, pressure adjusting wheel disc 3 contacts.The material of the first friction layer 11, second friction layer 31 and the 3rd friction layer 41 is the material of high static friction coefficient, and preferred heat-resistant, wear-resistant, the material that stress deformation is little, be beneficial to drive wheel disc 1 to transmit rotating speed and moment of torsion to speed change roller 4 and pressure adjusting wheel 3, improve the ability of stepless speed changing mechanism transmitting torque.
In the present embodiment, pressure regulator 8 is electronically controlled hydraulic system, pressure regulator 8 is provided with pressure transducer 81, for the force value of detected pressures adjustment wheel disc 3 pairs of speed change rollers 4.Pressure transducer 81 can select displacement transducer or pressure signal sensor.
Particularly, annular oil groove is offered in the outboard end of pressure adjusting wheel disc 3, the stationary housing of the rotating shaft of pressure adjusting wheel disc 3 has shoulder, annular oil groove and shoulder Spielpassung, form hydraulic pressure cavity, shoulder is provided with liquid inlet channel and returns fluid passage, controls liquid inlet channel and return the opening and closing of fluid passage by hydrovalve, the pressure of hydraulic control intracavity liquid, controls the motion vertically of described pressure adjusting wheel disc.
More specifically, liquid working substance in electronically controlled hydraulic system is hydraulic oil, select two-position three way control valve to control liquid inlet channel and return the opening and closing of fluid passage, pressure transducer 81 can detect the pressure of hydraulic chamber constantly, controls two-position three way control valve by control system.When needing increase pressure adjusting wheel disc 3 to be applied to the positive pressure on speed change roller 4, two position three-way valve increases to the charge oil pressure in hydraulic chamber, otherwise reduces to charge oil pressure in hydraulic chamber.
It should be noted that, pressure regulator 8 can according to the practical structures of stepless speed changing mechanism and Demand Design, and pressure transducer 81 also can be designed to displacement transducer pattern, according to displacement relation calculating pressure, also can directly use pressure signal sensor.
Position regulating device 5 comprises nut, screw rod, transmission snap ring and drive motor, screw rod is connected with transmission snap ring, and transmission snap ring is connected with the side of speed change roller, drive motor rotating nut, bolt rod driving transmission snap ring, transmission snap ring drives speed change roller 4 to move vertically.
Illustrate transmittance process and the transmission principle of stepless speed changing mechanism rotating speed that the present embodiment provides and moment of torsion below:
As shown in Figure 1, the rotating speed of motor input is transmitted to by input shaft 12 and drives wheel disc 1, drive and drive wheel disc 1 to turn clockwise, the first friction layer 11 of wheel disc 1 is driven to produce static friction with the 3rd friction layer 41 of speed change roller 4, and then drive speed change roller 4 to rotate, 3rd friction layer 41 of speed change roller 4 produces static friction with the second friction layer 31 of pressure adjusting wheel disc 3, drives pressure adjusting wheel disc 3 to rotate, by roller shaft 42 outwards output speed and the torque of speed change roller 4.
Driving wheel disc 1 with the velocity ratio i1 of speed change roller 4 is: i1=n1/n2=2 π r/2 π R=r/R;
Wherein, r is the radius of speed change roller 4, and R is speed change roller 4 and the distance driving the point of contact of wheel disc 1 extremely to drive wheel disc 1 center.
Speed change roller 4 can be regulated relatively to drive the position of wheel disc 1 by position regulating device 5 continuous print, namely regulate the size of R value, thus can velocity ratio be continuously changed, realize stepless automatic transmission.
Pressure transducer 81 for real-time inspection pressure regulator 8 pairs of pressure adjusting wheel disc 3 applied pressures, thus according to the ability that the characteristic of the friction of the first friction layer 11, second friction layer 31 and the 3rd friction layer 41, size, position, each velocity ratio and gap calculated torque are transmitted.Moment of torsion transmission that can be actual according to torque-transfer capability adjustment.At gear shift stage, the level of the pressure transducer 81 pressure reduction of survey calculation pressure regulator 8 in real time.
In order to improve torque-transfer capability, preferably, pressure adjusting wheel disc 3 provides higher pressure to speed variable rotor 4, simultaneously, high static friction coefficient material selected by the friction material of the first friction layer 11, second friction layer 31 and the 3rd friction layer 41, therefore also can be subject to higher resistance when position regulating device 5 regulates the position of speed variable rotor 4, thus impact regulates efficiency.Thus, can when variable rate signal prepare, suitably reduction pressure adjusting wheel disc 3 acts on the pressure on speed change roller 4, thus can reduce surface friction drag, is convenient to the position regulating speed change roller 4, realizes continuously changing of velocity ratio.
After gear ratio adjustment puts in place, the pressure of Recovery and rebuild adjustment wheel disc 3.
The stepless speed changing mechanism that the present embodiment provides, drive wheel disc 1 to be rotated by stiction driving speed change roller 4, position regulating device 5 regulates speed change roller 4 center to the distance driving wheel disc 1 center continuously, and then realizes continuous stepless adjustment velocity ratio.And, due to pressure adjusting wheel disc 3 being provided with pressure regulator 8, can according to duty requirements, regulate pressure adjusting wheel disc 3 to apply the pressure of speed change roller 4 by pressure regulator 8, when transmitting torque, increase the frictional force driven between wheel disc 1 and speed change roller 4, thus raising torque-transfer capability, when speed change, reduce to drive the frictional force between wheel disc 1 and speed change roller 4, be more conducive to mechanism's speed change.
The schematic diagram of a kind of working state of the stepless speed changing mechanism provided for second embodiment of the invention with reference to figure 2, Fig. 2.
Second embodiment of the invention is the improvement done on the basis of the first embodiment, and concrete improvement is as follows:
The stepless speed changing mechanism that the present embodiment provides also comprises at least one drive bevel gear 2, and drives the outer rim of wheel disc 1 and pressure adjusting wheel disc 3 for cone toothing, drives the two ends of wheel disc 1 and pressure adjusting wheel disc 3 to engage with drive bevel gear 2 respectively.
Further, in the present embodiment, the quantity of speed change roller 4 is two, and along driving the axisymmetrical of wheel disc 1 to arrange.
In addition, also comprise two speed cone gears, 71, output bevel gear wheel 72 and an auxiliary bevel gear 73, speed cone gear 71 is coaxially connected with speed change roller 4 respectively, and speed cone gear 71 one end and output bevel gear are taken turns 72 and engaged, and take turns 72 output speeds and moment of torsion by output bevel gear.The other end of speed cone gear 71 engages with auxiliary bevel gear 73.
The axle of two speed cone gears 71 is provided with a pair clutch shaft bearing group 61, clutch shaft bearing group 61 can bear the axial force of speed change roller 4, and can the gap of self adaptive-compensating speed cone gear 71 and output bevel gear wheel 72, to overcome speed change roller 4 owing to initially installing and the deviation that causes of abrasion deformation.The axle of two drive bevel gear 2 is provided with the axial force that a pair second bearing pack 62, second bearing pack 62 can bear drive bevel gear, and the gap of drive bevel gear 2 can be regulated.
Illustrate transmittance process and the transmission principle of stepless speed changing mechanism rotating speed that second embodiment of the invention provides and moment of torsion below:
As shown in Figure 2, the rotating speed of motor input is transmitted to by input shaft 12 and drives wheel disc 1, drive and drive wheel disc 1 to turn clockwise, wheel disc 1 is driven to drive the drive bevel gear 2 engaged with it to rotate, drive bevel gear 2 drives the pressure adjusting wheel disc 3 engaged with it to rotate, wheel disc 1 and pressure adjusting wheel disc 3 is driven to produce static friction by the first friction layer 11 and the second friction layer 31 with the 3rd friction layer 41 of speed change roller 4, common drive speed change roller 4 rotates, by axially outer output speed and the torque of speed change roller 4.
Driving wheel disc 1 with the velocity ratio i1 of speed change roller 4 is: i1=n1/n2=2 π r/2 π R=r/R;
Wherein, r is the radius of speed change roller 4, and R is speed change roller 4 and the distance driving the point of contact of wheel disc 1 extremely to drive wheel disc 1 center.
Speed cone gear 71 and the output bevel gear velocity ratio of taking turns between 72 is i2.
Then, velocity ratio i=i1 × i2=(the r/R) × i2 of this stepless speed changing mechanism;
Figure 3 shows that the another kind of working state of stepless speed changing mechanism, speed change roller 4 can be regulated relatively to drive the position of wheel disc 1 by position regulating device 5 continuous print, namely regulate the size of R value, thus can velocity ratio be continuously changed, realize stepless automatic transmission.
The stepless speed changing mechanism that the present embodiment provides, wheel disc 1 and pressure adjusting wheel disc 3 is driven to be bevel gear structure, by the drive bevel gear 2 engaged with it, moment of torsion is passed to pressure adjusting wheel disc 3, pressure adjusting wheel disc 3 is made also to have the ability driving speed change roller 4, thus can improve the ability of stepless speed changing mechanism transmitting torque, improve the application area of stepless speed changing mechanism.
It should be noted that, in above-described embodiment, the quantity of drive bevel gear 2 also can be one, and the quantity of speed change roller 4 can be also three, four or more, can realize the function of the stepless speed changing mechanism in above-described embodiment equally.
The embodiment of the present invention also provides a kind of automobile, and this automobile is provided with the stepless speed changing mechanism in embodiment, by described speed change roller 4 output speed and moment of torsion.
Last it is noted that above embodiment is only in order to illustrate technological scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (8)
1. a stepless speed changing mechanism, it is characterized in that, comprise driving wheel disc (1) arranged in parallel and pressure adjusting wheel disc (3), have at least one speed change roller (4) between described driving wheel disc (1) and pressure adjusting wheel disc (3), the axis being parallel of described speed change roller (4) is in described driving wheel disc (1) and point to the axis of described driving wheel disc (1);
The surface of contact that described driving wheel disc (1), pressure adjusting wheel disc (3) and speed change roller (4) contact with each other has friction layer, and the material of described friction layer is high static friction coefficient, heat-resistant, wear-resistant, material that stress deformation is little; Described speed change roller (4) is connected with position regulating device (5), can regulate the distance at described speed change roller (4) center to described driving wheel disc (1) center;
Described pressure adjusting wheel disc (3) is provided with pressure regulator (8), regulates described pressure adjusting wheel disc (3) to described speed change roller (4) applied pressure size;
Also comprise two speed cone gears (71) and output bevel gear wheel (72), the axle of described output bevel gear wheel (72) is vertical with the axle of described speed cone gear (71), described speed cone gear (71) is coaxially connected with described speed change roller (4) respectively, and two described speed cone gear (71) one end are taken turns (72) and engaged with described output bevel gear;
Also comprise auxiliary bevel gear (73); Described auxiliary bevel gear (73) and described output bevel gear take turns the dead in line of (72), and described auxiliary bevel gear (73) is engaged with the other end of two speed cone gears (71);
Described pressure regulator (8) comprises hydrovalve; The outer end of described pressure adjusting wheel disc (3) offers annular oil groove, the stationary housing of the rotating shaft of described pressure adjusting wheel disc (3) has shoulder, described annular oil groove and described shoulder Spielpassung, form hydraulic pressure cavity, and described shoulder is provided with liquid inlet channel and returns fluid passage; Control described liquid inlet channel by hydrovalve and return the opening and closing of fluid passage, controlling the pressure of described hydraulic pressure intracavity liquid, control the motion of described pressure adjusting wheel disc (3).
2. stepless speed changing mechanism according to claim 1, it is characterized in that, also comprise at least one drive bevel gear (2), and the outer rim of described driving wheel disc (1) and pressure adjusting wheel disc (3) is cone toothing, described driving wheel disc (1) and described pressure adjusting wheel disc (3) engage with described drive bevel gear (2).
3. stepless speed changing mechanism according to claim 1, is characterized in that, the quantity of described speed change roller (4) is two, and arranges along the axisymmetrical of described driving wheel disc (1); Described speed change roller (4) is connected with speed change roller shaft by spline.
4. stepless speed changing mechanism according to claim 2, is characterized in that, the axle of described speed cone gear (71) is provided with a pair clutch shaft bearing group (61); The axle of described drive bevel gear (2) is provided with a pair second bearing pack (62).
5. stepless speed changing mechanism according to claim 1, it is characterized in that, described pressure regulator (8) is provided with pressure transducer (81), for detecting the force value of described pressure adjusting wheel disc (3) to described speed change roller (4).
6. stepless speed changing mechanism according to claim 5, is characterized in that, described pressure transducer (81) is displacement transducer or pressure signal sensor.
7. stepless speed changing mechanism according to claim 1, it is characterized in that, described position regulating device (5) comprises nut, screw rod, transmission snap ring and drive motor, described screw rod is connected with described transmission snap ring, described transmission snap ring is connected with described speed change roller, drive motor rotates described nut, is changed the position of speed change roller by transmission snap ring.
8. an automobile, is characterized in that, this automobile is provided with the stepless speed changing mechanism described in any one of claim 1-7, by described speed change roller (4) output speed and moment of torsion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110228331.7A CN102927225B (en) | 2011-08-10 | 2011-08-10 | Stepless speed changing mechanism and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110228331.7A CN102927225B (en) | 2011-08-10 | 2011-08-10 | Stepless speed changing mechanism and automobile |
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| Publication Number | Publication Date |
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| CN102927225A CN102927225A (en) | 2013-02-13 |
| CN102927225B true CN102927225B (en) | 2015-10-28 |
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| CN201110228331.7A Active CN102927225B (en) | 2011-08-10 | 2011-08-10 | Stepless speed changing mechanism and automobile |
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Families Citing this family (5)
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| CN103542058B (en) * | 2013-10-15 | 2017-02-15 | 同济大学 | Frictional infinitely variable speed device with double-intermediate-roller steering reducing mechanism |
| CN106195177B (en) * | 2016-08-31 | 2018-08-21 | 四川大学 | The design method of move speed regulation towed contiuously variable transmission adaptive speed regulation mechanism |
| CN106122405B (en) * | 2016-08-31 | 2018-06-19 | 四川大学 | A kind of towed contiuously variable transmission in adaptive rate square position |
| CN106641142A (en) * | 2016-11-25 | 2017-05-10 | 淮南市福地环保科技有限公司 | Stepless speed changer |
| CN113400107A (en) * | 2021-06-22 | 2021-09-17 | 陈日裕 | Scissor blade grinding device convenient to adjust grinding speed and improve work efficiency |
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| US3323384A (en) * | 1965-03-30 | 1967-06-06 | Wodarka Ewald | Frictional gearing transmission |
| US4270400A (en) * | 1980-02-21 | 1981-06-02 | Fodor Eben V | Continuously variable traction drive transmission |
| CN2599323Y (en) * | 2003-01-21 | 2004-01-14 | 伍德荣 | Cart-wheel stepless speed variator |
| CN1752479A (en) * | 2004-09-21 | 2006-03-29 | 王国斌 | Slide palte deformed tooth stepless engagement adjustable gear |
| CN2797773Y (en) * | 2005-06-06 | 2006-07-19 | 汇华汽车电子技术（深圳）有限公司 | Limitless speed variator |
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2011
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1081954A (en) * | 1913-01-18 | 1913-12-23 | Frederick D Green | Variable-speed gearing. |
| US3323384A (en) * | 1965-03-30 | 1967-06-06 | Wodarka Ewald | Frictional gearing transmission |
| US4270400A (en) * | 1980-02-21 | 1981-06-02 | Fodor Eben V | Continuously variable traction drive transmission |
| CN2599323Y (en) * | 2003-01-21 | 2004-01-14 | 伍德荣 | Cart-wheel stepless speed variator |
| CN1752479A (en) * | 2004-09-21 | 2006-03-29 | 王国斌 | Slide palte deformed tooth stepless engagement adjustable gear |
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