CN102927225A - Stepless speed change mechanism and automobile - Google Patents
Stepless speed change mechanism and automobile Download PDFInfo
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- CN102927225A CN102927225A CN2011102283317A CN201110228331A CN102927225A CN 102927225 A CN102927225 A CN 102927225A CN 2011102283317 A CN2011102283317 A CN 2011102283317A CN 201110228331 A CN201110228331 A CN 201110228331A CN 102927225 A CN102927225 A CN 102927225A
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- wheel disc
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- speed change
- change roller
- changing mechanism
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Abstract
The invention discloses a stepless speed change mechanism and an automobile. The stepless speed change mechanism comprises a driving wheel disc and a pressure adjusting wheel disc which are parallel to each other; at least one speed change roller is arranged between the driving wheel disc and the pressure adjusting wheel disc; the axis of the speed change roller is parallel to the driving wheel disc and points to the axis of the driving wheel disc; contact surfaces of the driving wheel disc, the pressure adjusting wheel disc and the speed change roller are provided with friction layers; the speed change roller is provided with a position adjusting device which can adjust a distance from the center of the speed change roller to the center of the driving wheel disc; and the pressure adjusting wheel disc is provided with a pressure adjusting device to adjust the pressure applied to the speed change roller by the pressure adjusting wheel disc. The stepless speed change mechanism can realize stepless speed change and improve the torque transmitting capacity.
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 be realized stepless variation 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 more simple in structure than traditional automatic transmission, and volume is less, mainly brings the stepless variation that realizes velocity ratio by driven wheel and transmission.
Existing stepless speed changing mechanism adopts the ratchet of driving belt and variable groove width to carry out transmission of power, namely when ratchet changes 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, can only limit the use of at low-power and low moment of torsion automobile, and application area is little.
Summary of the invention
The invention provides a kind of stepless speed changing mechanism and automobile, in order to solve defective of the prior art, can realize stepless change and improve the ability that the stepless speed changing mechanism moment of torsion transmits.
The invention provides a kind of stepless speed changing mechanism, comprise the driving wheel disc and the pressure adjustment wheel disc that are arranged in parallel, described driving wheel disc and pressure are adjusted between the wheel disc has at least one speed change roller, and the axis of described speed change roller is parallel to described driving wheel disc and points to the axis of described driving wheel disc;
The surface of contact that described driving wheel disc, pressure are adjusted 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 extremely described driving wheel disk center;
Described pressure is adjusted on the wheel disc pressure regulator is installed, and regulates described pressure and adjusts wheel disc to described speed change roller applied pressure size.
The present invention also provides this automobile of a kind of automobile that stepless speed changing mechanism in the 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 and drive the rotation of speed change roller by stiction, and position regulating device is regulated the distance of speed change roller center to driving wheel disk center continuously, and then realize continuous stepless adjusting velocity ratio.And, because pressure is adjusted on the wheel disc pressure regulator is installed, can be according to the operating mode demand, regulate pressure by pressure regulator and adjust the pressure that wheel disc applies the speed change roller, when transmitting torque, increase the frictional force that drives between wheel disc and the speed change roller, thereby raising torque-transfer capability, when speed change, reduce to drive the frictional force between wheel disc and the speed change roller, more be conducive to mechanism's speed change.
Description of drawings
The schematic representation of the stepless speed changing mechanism that Fig. 1 provides for first embodiment of the invention;
The schematic representation of a kind of working state of the stepless speed changing mechanism that Fig. 2 provides for second embodiment of the invention;
The schematic representation 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:
Embodiment
For the purpose, technological scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technological scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment who obtains under the creative work prerequisite.
With reference to Fig. 1, the schematic representation of the stepless speed changing mechanism that Fig. 1 provides 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 adjustment wheel disc 3, driving wheel disc 1 and pressure are adjusted between the wheel disc 3 has a speed change roller 4, and the axis of speed change roller 4 is parallel to driving wheel disc 1 and points to the axial of driving wheel disc 1.
The surface of contact that drives wheel disc 1, pressure adjustment wheel disc 3 and speed change roller 4 has friction layer, and speed change roller 4 has position regulating device 5, can regulate speed change roller 4 axial centre to the distance that drives wheel disc 1 axial centre.
The outside that pressure is adjusted wheel disc 3 has pressure regulator 8, regulates pressure and adjusts 3 pairs of speed change roller 4 applied pressures sizes of wheel disc.
Particularly, in the present embodiment, driving the relative surface of wheel disc 1 and pressure adjustment wheel disc 3, the surface that namely contacts with speed change roller 4 respectively has respectively the first friction layer 11 and the second friction layer 31, correspondingly, speed change roller 4 has the 3rd friction layer 41 with the outer surface that driving wheel disc 1, pressure adjustment wheel disc 3 contact.The material of the first friction layer 11, the 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 and transmit rotating speed and moment of torsion to speed change roller 4 and pressure regulating wheel 3, improve the ability of stepless speed changing mechanism transmitting torque.
In the present embodiment, pressure regulator 8 is electronically controlled hydraulic system, and pressure transducer 81 is installed on the pressure regulator 8, adjusts the force value of 3 pairs of speed change rollers 4 of wheel disc for detection of pressure.Pressure transducer 81 can be selected displacement transducer or pressure signal sensor.
Particularly, the outboard end of adjusting wheel disc 3 at pressure offers annular oil groove, the stationary housing that pressure is adjusted the rotating shaft of wheel disc 3 has shoulder, annular oil groove and convex shoulder Spielpassung, form hydraulic pressure cavity, shoulder is provided with liquid inlet channel and returns fluid passage, by hydrovalve control liquid inlet channel and the opening and closing of returning fluid passage, the pressure of control hydraulic pressure intracavity liquid is controlled the axial motion in described pressure regulating wheel rim.
More specifically, liquid working substance in the electronically controlled hydraulic system is hydraulic oil, select the opening and closing of two-position three way control valve control liquid inlet channel and time fluid passage, pressure transducer 81 can detect the pressure of hydraulic chamber constantly, by control system control two-position three way control valve.When needs increased pressure and adjust wheel disc 3 and be applied to positive pressure on the speed change roller 4, two position three-way valve increased the charge oil pressure in the hydraulic chamber, otherwise reduced charge oil pressure in the hydraulic chamber.
Need to prove that pressure regulator 8 can be according to practical structures and the Demand Design of stepless speed changing mechanism, pressure transducer 81 also can be designed to the displacement transducer pattern, according to the displacement relation calculating pressure, and also direct working pressure signal emitter.
Position regulating device 5 comprises nut-screw mechanism, transmission snap ring and drive motor, screw rod is connected with the transmission snap ring, and the transmission snap ring is connected with the side of speed change roller, the drive motor rotating nut, bolt rod driving transmission snap ring, transmission snap ring drive vertically motion of speed change roller 4.
The below specifies stepless speed changing mechanism rotating speed and transfer of torque process and the transmission principle that present embodiment provides:
As shown in Figure 1, the rotating speed of motor input passes to driving wheel disc 1 by input shaft 12, driving driving wheel disc 1 turns clockwise, drive the 3rd friction layer 41 generation static friction of the first friction layer 11 with the speed change roller 4 of wheel disc 1, and then drive speed change roller 4 rotates, the second friction layer 31 that the 3rd friction layer 41 and the pressure of speed change roller 4 is adjusted wheel disc 3 produces static friction, and band kinetic pressure regulating wheel dish 3 rotates, by roller shaft 42 outside output speed and the torques of speed change roller 4.
The velocity ratio i1 that drives wheel disc 1 and 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 with the point of contact that drives wheel disc 1 to the distance that drives wheel disc 1 center.
Can relatively drive by position regulating device 5 continuous adjusting speed change rollers 4 position of wheel disc 1, namely regulate the size of R value, thereby can continuously change velocity ratio, realize stepless automatic transmission.
In order to improve torque-transfer capability, preferably, pressure is adjusted wheel disc 3 and is provided higher pressure to speed variable rotor 4, simultaneously, the friction material of the first friction layer 11, the second friction layer 31 and the 3rd friction layer 41 is selected high static friction coefficient material, so when position regulating device 5 is regulated the position of speed variable rotor 4, also can be subject to higher resistance, thereby efficient is regulated in impact.Thereby, can be when variable rate signal be prepared, suitably reduce pressure and adjust wheel disc 3 and act on pressure on the speed change roller 4, thereby can reduce surface friction drag, be convenient to regulate the position of speed change roller 4, realize continuously changing of velocity ratio.
After gear ratio adjustment puts in place, recover the pressure that pressure is adjusted wheel disc 3.
The stepless speed changing mechanism that present embodiment provides drives wheel disc 1 and rotates by stiction driving speed change roller 4, and position regulating device 5 is regulated speed change rollers 4 centers continuously to the distance that drives wheel disc 1 center, and then realizes continuous stepless adjusting velocity ratio.And, because pressure is adjusted on the wheel disc 3 pressure regulator 8 is installed, can be according to the operating mode demand, regulate pressure by pressure regulator 8 and adjust the pressure that wheel disc 3 applies speed change roller 4, when transmitting torque, increase the frictional force that drives between wheel disc 1 and the speed change roller 4, thereby raising torque-transfer capability, when speed change, reduce to drive the frictional force between wheel disc 1 and the speed change roller 4, more be conducive to mechanism's speed change.
With reference to figure 2, the schematic representation of a kind of working state of the stepless speed changing mechanism that Fig. 2 provides for second embodiment of the invention.
Second embodiment of the invention is the improvement of doing on the first embodiment's basis, and concrete improvement is as follows:
The stepless speed changing mechanism that present embodiment provides also comprises at least one drive bevel gear 2, and drives wheel disc 1 and pressure and adjust the outer rim of wheel disc 3 and be the cone toothing, drive two ends that wheel disc 1 and pressure adjusts wheel disc 3 respectively with drive bevel gear 2 engagements.
And in the present embodiment, the quantity of speed change roller 4 is two, and is arranged symmetrically with along the axis that drives wheel disc 1.
In addition, also comprise two speed cone gears 71, an output bevel gear 72 and an auxiliary bevel gear 73, speed cone gear 71 respectively with 4 coaxial connections of speed change roller, 72 engagements of speed cone gear 71 1 ends and output bevel gear are by output bevel gear 72 output speeds and moment of torsion.The other end of speed cone gear 71 and 73 engagements of auxiliary bevel gear.
A pair of clutch shaft bearing group 61 is installed on the axle of two speed cone gears 71, clutch shaft bearing group 61 can be born the axial force of speed change roller 4, and can self adaptive-compensating speed cone gear 71 and the gap of output bevel gear 72, to overcome speed change roller 4 because initial the installation and deviation that abrasion deformation causes.A pair of the second bearing pack 62, the second bearing pack 62 are installed on the axle of two drive bevel gear 2 can bear the axial force of drive bevel gear, and can regulate the gap of drive bevel gear 2.
The below specifies stepless speed changing mechanism rotating speed and transfer of torque process and the transmission principle that second embodiment of the invention provides:
As shown in Figure 2, the rotating speed of motor input passes to driving wheel disc 1 by input shaft 12, driving driving wheel disc 1 turns clockwise, driving wheel disc 1 drive rotates with the drive bevel gear 2 of its engagement, drive bevel gear 2 drives with the pressure of its engagement and adjusts wheel disc 3 rotations, drive wheel disc 1 and pressure and adjust wheel disc 3 by the 3rd friction layer 41 generation static friction of the first friction layer 11 and the second friction layer 31 and speed change roller 4, the common speed change roller 4 that drives rotates, by axial outer output speed and the torque of speed change roller 4.
The velocity ratio i1 that drives wheel disc 1 and 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 with the point of contact that drives wheel disc 1 to the distance that drives wheel disc 1 center.
Velocity ratio between speed cone gear 71 and the output bevel gear 72 is i 2.
Then, the velocity ratio i=i1 * i2=(r/R) of this stepless speed changing mechanism * i2;
Figure 3 shows that the another kind of working state of stepless speed changing mechanism, can relatively drive by position regulating device 5 continuous adjusting speed change rollers 4 position of wheel disc 1, namely regulate the size of R value, thereby can continuously change velocity ratio, realize stepless automatic transmission.
The stepless speed changing mechanism that present embodiment provides, driving wheel disc 1 and pressure adjustment wheel disc 3 is the bevel gear structure, adjust wheel disc 3 by with the drive bevel gear 2 of its engagement moment of torsion being passed to pressure, so that adjusting wheel disc 3, pressure also has the ability that drives speed change roller 4, thereby can improve the ability of stepless speed changing mechanism transmitting torque, improve the application area of stepless speed changing mechanism.
Need to prove that in above-described embodiment, the quantity of drive bevel gear 2 also can be one, the quantity of speed change roller 4 also can be three, four or more, can realize equally the function of the stepless speed changing mechanism in above-described embodiment.
The embodiment of the invention also provides a kind of automobile, and this automobile is equipped with the stepless speed changing mechanism among the embodiment, by described speed change roller 4 output speeds and moment of torsion.
It should be noted that at last: above embodiment only in order to technological scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (11)
1. stepless speed changing mechanism, it is characterized in that, comprise the driving wheel disc (1) and the pressure adjustment wheel disc (3) that are arranged in parallel, described driving wheel disc (1) and pressure are adjusted between the wheel disc (3) has at least one speed change roller (4), and the axis of described speed change roller (4) is parallel to described driving wheel disc (1) and points to the axis of described driving wheel disc (1);
The surface of contact that described driving wheel disc (1), pressure adjustment wheel disc (3) and speed change roller (4) are in contact with one another has friction layer, 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 is adjusted on the wheel disc (3) pressure regulator (8) is installed, and regulates described pressure and adjusts wheel disc (3) to described speed change roller (4) applied pressure size.
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 that described driving wheel disc (1) and pressure are adjusted wheel disc (3) is the cone toothing, and described driving wheel disc (1) and described pressure are adjusted wheel disc (3) and described drive bevel gear (2) engagement.
3. stepless speed changing mechanism according to claim 1 is characterized in that, the quantity of described speed change roller (4) is two, and is arranged symmetrically with along the axis of described driving wheel disc (1); Described speed change roller (4) is connected with the speed change roller shaft by spline.
4. stepless speed changing mechanism according to claim 3, it is characterized in that, also comprise two speed cone gears (71) and an output bevel gear (72), the axle of described output bevel gear (72) is vertical with the axle of described speed cone gear (71), described speed cone gear (71) respectively with coaxial connection of described speed change roller (4), two described speed cone gear (71) one ends and described output bevel gear (72) engagement.
5. stepless speed changing mechanism according to claim 4 is characterized in that, also comprises auxiliary bevel gear (73); The dead in line of described auxiliary bevel gear (73) and described output bevel gear (72), described auxiliary bevel gear (73) meshes with the other end of two speed cone gears (71).
6. stepless speed changing mechanism according to claim 5 is characterized in that, a pair of clutch shaft bearing group (61) is installed on the axle of described speed cone gear (71); A pair of the second bearing pack (62) is installed on the axle of described drive bevel gear (2).
7. stepless speed changing mechanism according to claim 1, it is characterized in that, pressure transducer (81) is installed on the described pressure regulator (8), adjusts wheel disc (3) to the force value of described speed change roller (4) for detection of described pressure.
8. stepless speed changing mechanism according to claim 7 is characterized in that, described pressure transducer (81) is displacement transducer or pressure signal sensor.
9. stepless speed changing mechanism according to claim 1, it is characterized in that, described position regulating device (5) comprises nut-screw mechanism, 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, changes the position of speed change roller by the transmission snap ring.
10. stepless speed changing mechanism according to claim 1 is characterized in that, described pressure regulator (8) comprises hydrovalve; The outer end that described pressure is adjusted wheel disc (3) offers annular oil groove, the stationary housing that described pressure is adjusted the rotating shaft of wheel disc (3) has shoulder, described annular oil groove and described convex shoulder Spielpassung form hydraulic pressure cavity, and described shoulder is provided with liquid inlet channel and returns fluid passage; Control described liquid inlet channel and the opening and closing of returning fluid passage by hydrovalve, control the pressure of described hydraulic pressure intracavity liquid, control the motion that described pressure is adjusted wheel disc (3).
11. an automobile is characterized in that, this automobile is equipped with each described stepless speed changing mechanism of claim 1-10, 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 true CN102927225A (en) | 2013-02-13 |
| CN102927225B CN102927225B (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542058A (en) * | 2013-10-15 | 2014-01-29 | 同济大学 | Frictional infinitely variable speed device with double-intermediate-roller steering reducing mechanism |
| CN106122405A (en) * | 2016-08-31 | 2016-11-16 | 四川大学 | The towed buncher in a kind of adaptive rate square position |
| CN106195177A (en) * | 2016-08-31 | 2016-12-07 | 四川大学 | A kind of method for designing of move speed regulation class towed buncher adaptive speed regulation mechanism |
| 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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| US1081954A (en) * | 1913-01-18 | 1913-12-23 | Frederick D Green | Variable-speed gearing. |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542058A (en) * | 2013-10-15 | 2014-01-29 | 同济大学 | Frictional infinitely variable speed device with double-intermediate-roller steering reducing mechanism |
| CN103542058B (en) * | 2013-10-15 | 2017-02-15 | 同济大学 | Frictional infinitely variable speed device with double-intermediate-roller steering reducing mechanism |
| CN106122405A (en) * | 2016-08-31 | 2016-11-16 | 四川大学 | The towed buncher in a kind of adaptive rate square position |
| CN106195177A (en) * | 2016-08-31 | 2016-12-07 | 四川大学 | A kind of method for designing of move speed regulation class towed buncher 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 |
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| 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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|---|---|
| CN102927225B (en) | 2015-10-28 |
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