CN101705981B - Continuously variable transmission of snowmobile - Google Patents
Continuously variable transmission of snowmobile Download PDFInfo
- Publication number
- CN101705981B CN101705981B CN2009101918255A CN200910191825A CN101705981B CN 101705981 B CN101705981 B CN 101705981B CN 2009101918255 A CN2009101918255 A CN 2009101918255A CN 200910191825 A CN200910191825 A CN 200910191825A CN 101705981 B CN101705981 B CN 101705981B
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- roller
- displacement disc
- central shaft
- fixed tray
- driving wheel
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Abstract
The invention discloses a continuously variable transmission (CVT) of a snowmobile. The CVT comprises a driving wheel, a driven wheel and a transmission belt which is used for connecting the driving wheel with the driven wheel. The driving wheel is provided with a fixed disc with a conical surface, a movable disc and a central shaft. The CVT is characterized in that the central shaft arranged between the fixed disc and the movable disc is sheathed with a rolling bearing; the periphery of the movable disc is uniformly provided with 2-4 idler wheels; two sides of each idler wheel are symmetrically provided with counterweight arms; one end of the central shaft, far away from the fixed disc, is fixed with a cover; the idler wheels on the movable disc always prop against the internal surface of the cover under the action of a compressive spring; and positions on the internal surface of the cover, corresponding to the idler wheels, are provided with idler wheel slideways. The CVT has simplestructure and low manufacture cost, can play a function of turning off the power and replacing a clutch when the transmission belt falls on the ball bearing, has greater centrifugal force at a certain rotation speed, and leads the driving wheel to quickly and forcibly push the fixed disc, thus reliably and effectively changing the groove size of the driving wheel and the driven wheel automatically, and realizing speed change.
Description
Technical field
The present invention relates to gear, more particularly, relate to the snowmobile stepless speed variator.
Background technique
Stepless speed variator system be the drive wheel that can change diameter by two, and the transmission of being overlapped on two drive wheels brings transmission.Miniature pedal motorcycle generally adopts stepless speed changes devices, and it is to pass through centrifugal roller generation centrifugal force by driving wheel, and pressure drive follower overcomes the spring resistance in the follower, makes follower diminish the driving wheel change greatly, thus the realization speed change.Motorcycle stepless speed change driving wheel comprises fixed tray and the displacement disc of being with the conical surface, fixed tray is fixed on central shaft one end, displacement disc slides on this central shaft, end at the close fixed tray of displacement disc is the wheel cover of the band conical surface, extended axially central sleeve from the middle part of wheel cover to the other end, central sleeve and central shaft cunning are joined; In the wheel cover of displacement disc, freely be placed with roller, roller is generally 6, be set with hard, wear-resistant, heatproof composite plastic on the cylindrical of roller, prevent that roller from directly contacting with the displacement disc rail slot, displacement disc is by the dunnage driven rotary of its side, and each roller produces centrifugal force in its rail slot in the process of rotation thereby drive.Its speed-change process is: along with the raising of engine speed, six rollers in the driving wheel are under action of centrifugal force, tilted slide on displacement disc outwards moves, roller promotes displacement disc and moves to fixed tray, distance between fixed tray and the displacement disc is narrowed down, because of belt width is certain, driving belt will be by outwards circular direction extruding, and it is big that driving wheel becomes; Because the length of driving belt is certain, when driving wheel became big, driving belt can overcome pressure circular direction motion in follower of follower spring again, follower diminishes, and velocity ratio diminishes, and vehicle becomes at a high speed, otherwise, when engine speed reduced, roller moved inwards, and displacement disc is opened, driving wheel diminishes, follower becomes big simultaneously, and it is big that velocity ratio becomes, and vehicle becomes low speed.Because the snowmobile of big discharge capacity will be born heavy load, high-speed, long-play (transportation, patrol) work, if adopt the structure of motorcycle stepless speed changer, the centrifugal force of its driving wheel roller is little, thrust to displacement disc is little, can not produce reliable and stable thrust to displacement disc, effectively adjusts the spacing between displacement disc and the fixed tray, particularly when starting, low speed driving, the centrifugal force of roller is littler, effective transmitting torque, and transmission efficiency is low; But, if applying axial hydraulic power to driven wheel, the hydraulic mechanism that adopts automobile to use promotes displacement disc, complex structure, and cost is too high.
Summary of the invention
Technical problem to be solved by this invention is: a kind of snowmobile stepless speed variator is provided, and it is simple in structure, cost is low, and it can adjust the spacing between driving wheel displacement disc and the fixed tray effectively automatically along with the rotation speed change of motor, realizes reliable speed change.
Technological scheme of the present invention is as follows: a kind of snowmobile stepless speed variator, comprise driving wheel, follower and be connected the driving belt of two-wheeled, described driving wheel has fixed tray and the displacement disc and the central shaft of the band conical surface, described fixed tray is fixed on central shaft one end, described displacement disc slides on this central shaft, end at the close fixed tray of displacement disc is the wheel cover of the band conical surface, the middle part has extended axially central sleeve in the cover body of wheel cover, its key is, also is with rolling bearing on the central shaft between described fixed tray and the displacement disc; On described displacement disc, circumferentially evenly be provided with two to four rolling, the bilateral symmetry of each roller is provided with weight arm, big and the front end kink of the front end of weight arm is on first bearing pin of plug-in mounting roller, and little and rear end, the rear end of weight arm is hinged on the end of central sleeve by second bearing pin; Be fixed with the lid of dried mushroom head away from an end of fixed tray at described central shaft, the opening end of this lid stretches in the described displacement disc and with displacement disc and is meshed by double wedge and side of body post, the stage clip that is enclosed within on the central shaft also is housed in the central sleeve of described displacement disc, and the roller on the displacement disc touches with the contacted inner surfaces that covers under the effect of stage clip all the time; On interior surface, be provided with the roller slideway with the corresponding position of roller, this roller slideway is formed for the bevel phase that big end is positioned at opening end, be positioned at the inclination angle of inclined plane of the inclination angle of inclined plane in the outside greater than the inboard, when the rotation of described displacement disc, under action of centrifugal force, can on the roller slideway, the fit rolling and push displacement disc to described fixed tray of described roller.
The present invention is provided with roller by weight arm on displacement disc, because the fastening piece (as nut) of weight arm, first bearing pin, roller and hinged usefulness that front end is heavy, gross mass is big, can under certain rotating speed, have bigger centrifugal force, and weight arm can play counterweight, balance and lever arm of force effect, make displacement disc can rapidly, effectively be pushed to fixed tray, thereby reliably adjust the spacing between driving wheel displacement disc and the fixed tray effectively automatically; The roller slideway is that the bevel phase of different angle is formed, and makes to have different speed change speed in the different velocity shootings, and than the slow-speed of revolution time, inclination angle of inclined plane is big, and displacement disc moves rapidly, and when higher rotation speed, inclination angle of inclined plane is little, and displacement disc moves comparatively slowly steadily; Between fixed tray and displacement disc, rolling bearing is set, not only define the minimum separable between fixed tray and the displacement disc, also make the driving belt extreme lower position can only be positioned on the rolling bearing, this moment, driving belt was by rolling bearing skid on central shaft, and driving belt both sides can not be fixed dish and displacement disc drive, transmission shaft can not arrive the transmission of power of central shaft the follower of speed changer, thereby plays cut-out power, replaces the effect of clutch; Because or the centrifugal force pulls displacement disc, than the hydraulic drive formula, simple in structure, the low cost of manufacture of the present invention; The roller slideway is arranged on and covers, because lid is positioned at axle head, maintenance, replacing are covered very convenient, and do not need the displacement disc of inboard is taken off.
For ease of arranging spring, make compact structure, be further improvement, the central sleeve endoporus of described displacement disc is the shoulder hole that reduces successively, the big end of this shoulder hole is near described fixed tray, its big stomidium is joined by the spring seat cunning that axle sleeve and central shaft tighten, and these spring seat two ends offset with described rolling bearing and stage clip respectively; The small end step hole of shoulder hole is joined by ladder axle sleeve and central shaft cunning, and the enlarged diameter section of this ladder axle sleeve and described small end step hole match, and the reduced diameter section of ladder axle sleeve stretches in the described stage clip, and the step of stage clip end face and ladder axle sleeve offsets.The reduced diameter section of ladder axle sleeve plays support, leading role to stage clip.
As further design, described roller is two, and roller is joined by roller axle sleeve and the described first bearing pin cunning, and this roller is stretched out at the two ends of roller axle sleeve and extrusion equates.Because the design of roller both sides has weight arm, centrifugal force is bigger, as long as through suitable size design, two rollers are just enough, in order to avoid cause unnecessary cost waste.
Further, for possessing suitable quality and centrifugal force, the diameter of described roller is 28～35mm, and length is 18～25mm.
Further, for ease of arranging and to satisfy counterweight, balance and the thrust arm of force required, the weight arm of described roller both sides is hook-type plates, its two is small one and large one circular arc, the orthodrome end of hook-type plate is through on described first bearing pin, the pitch-row of two pin-and-holes is 38～45mm, and the thickness of slab of weight arm is 10～15mm.
Further, for satisfying the speed change needs, the inclination angle on inclined-plane, the described roller slideway outside is a times of inboard inclination angle of inclined plane, the inclination angle on this inclined-plane, inboard is 10～20 °, the and arranged on left and right sides of described roller slideway has two parallel Tiao Tu Zhu Tu Zhu to play the guiding role along the inclined-plane, roller is rolled in chute.
The invention has the beneficial effects as follows:
1, under certain rotating speed, has bigger centrifugal force, roller and weight arm make displacement disc rapidly, effectively to be pushed to fixed tray, thereby reliably adjust the spacing between driving wheel displacement disc and the fixed tray effectively automatically, change the race size of driving wheel and follower.
2, between fixed tray and displacement disc, rolling bearing is set,, when driving belt is fallen on the rolling bearing, can plays cut-out power, replace the effect of clutch when fixed tray and displacement disc are opened to a certain degree;
3, owing to still being the centrifugal force pulls displacement disc, than the hydraulic drive formula, simple in structure, the low cost of manufacture of the present invention;
4, the roller slideway is arranged on and covers, because lid is positioned at axle head, maintenance, replacing are covered very convenient, and do not need the displacement disc of inboard is taken off.
Certainly, the present invention also can be used for big discharge capacity motorcycle.
Description of drawings
Fig. 1 is the structural representation of driving wheel.
Fig. 2 is the structural representation of displacement disc among Fig. 1.
Fig. 3 is the right elevation of Fig. 2.
Fig. 4 is the structural representation of lid.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
The present invention is a kind of snowmobile stepless speed variator, comprise driving wheel, follower and be connected driving wheel and the driving belt of follower, the structure of the structure of follower and motorcycle stepless speed changer follower is basic identical, the Moving plate of follower is a spring compression type, after needing the race diameter change greatly of driving wheel, by driving belt outside driving wheel circular direction move the spring force that overcomes follower (because driving belt length is constant), the Moving plate of follower is moved, thereby the race diameter of follower is diminished, realize speed change.As shown in Figure 1, driving wheel mainly is made up of fixed tray 1, displacement disc 2, central shaft 3, lid 4, stage clip 5, axle sleeve 6, spring seat 7, ladder axle sleeve 8 and rolling bearing 9.Wherein, the fixed tray 1 and the displacement disc 2 of driving wheel have the conical surface, fixed tray 1 is enclosed within an end of central shaft 3 and fixes with it, displacement disc 2 slides on this central shaft 3, is the wheel cover 21 of the band conical surface at displacement disc 2 near an end of fixed trays 1, and the middle part has extended axially central sleeve 22 in the cover body of wheel cover 21, and fixed tray 1 is relative with the conical surface of displacement disc 2, on the central shaft 3 between fixed tray 1 and the displacement disc 2, also be with rolling bearing 9, be separated with lining 10 between rolling bearing 9 and the fixed tray 1.When fixed tray 1 and displacement disc 2 are opened to a certain degree, when driving belt was fallen on the rolling bearing 9, the power on the central shaft 3 can not pass to driving belt, can play cut-out power, replaced the effect of clutch.
As Fig. 1, Fig. 2 and shown in Figure 3, on displacement disc 2, be symmetrically arranged with two rollers 23, the bilateral symmetry of each roller 23 is provided with weight arm 24, big and the front end kink of the front end of weight arm 24 is on first bearing pin 25 of plug-in mounting roller 23, and little and rear end, the rear end of weight arm 24 is hinged on the end of central sleeve 22 by second bearing pin 26; The diameter of roller 23 is 30mm, and length is 20mm, and roller 23 is by roller axle sleeve 23a and 25 sliding joining of first bearing pin, and this roller 23 is stretched out at the two ends of roller axle sleeve 23a and extrusion equates; In the both sides of roller axle sleeve 23a are tabular weight arms of hook-type 24, and its two is small one and large one circular arc, and the orthodrome end of hook-type plate is through on described first bearing pin 25, and the pitch-row of two pin-and-holes is 40mm, and the thickness of slab of weight arm 24 is 13mm.Roller 23 and weight arm 24 are formed counterweight structure, can under certain rotating speed, have bigger centrifugal force, and weight arm 24 can play counterweight, balance and lever arm of force effect, make displacement disc 2 can rapidly, effectively be pushed to fixed tray 1, thereby reliably adjust the spacing between driving wheel displacement disc 1 and the fixed tray 2 effectively automatically.Central sleeve 22 endoporus of displacement disc 2 are the shoulder holes that reduce successively, and the big end of this shoulder hole is near fixed tray 1, and 7 sliding the joining of spring seat that its big stomidium tightens by axle sleeve 6 and central shaft 1, these spring seat 7 two ends offset with rolling bearing 9 and stage clip 5 respectively; The small end step hole of shoulder hole is by ladder axle sleeve 8 and 1 sliding joining of central shaft, and the enlarged diameter section of this ladder axle sleeve 8 and small end step hole match, and the reduced diameter section of ladder axle sleeve 8 stretches in the stage clip 5, and the step of stage clip 5 end faces and ladder axle sleeve 8 offsets.Like this, displacement disc 2 trend that oriented all the time central shaft 3 moves away from an end of fixed tray 1 under the effect of stage clip 5.
As Fig. 1, shown in Figure 4, be fixed with the lid 4 of dried mushroom head by bolt 11 away from an end of fixed tray 1 at central shaft 3, the opening end of this lid 4 stretches in the displacement disc 2, the opening end of lid 4 is stretched the double wedge 44 that stretches out is arranged, double wedge 44 is meshed with side of body post 27 on the displacement disc 2, covers 4 and can give displacement disc 2 with transmission of torque thereby make.Roller 23 on the displacement disc 2 touches with the contacted inner surfaces that covers 4 under the effect of stage clip 5 all the time, on lid 4 internal surfaces, be provided with the roller slideway with roller 23 corresponding positions, this roller slideway is formed for the bevel phase that big end is positioned at opening end, be positioned at the inclination angle of inclined plane of the inclination angle of inclined plane in the outside greater than the inboard, the inclination angle on inclined-plane 41, the outside is times of 42 inclination angles, inboard inclined-plane, the inclination angle on this inclined-plane, inboard 42 is 14 °, than the slow-speed of revolution time, roller 23 is positioned on the big inclined-plane, the outside 41, inclination angle, displacement disc 2 moves rapidly, when higher rotation speed, roller 23 is positioned on the little inboard inclined-plane 42, inclination angle, and displacement disc 2 moves comparatively slowly steadily; The and arranged on left and right sides of roller slideway has parallel two Tiao Tu Zhu, 43 Tu Zhu 43 to play the guiding role along the inclined-plane, roller 23 is rolled in chute, when displacement disc 2 rotation, under action of centrifugal force, can on the roller slideway, fit rolling and push displacement disc 2 to fixed tray 1 of roller 23.
The present invention is work like this: along with the raising of engine speed, roller 23 on the driving wheel displacement disc 2 has been got rid of, roller 23 is under action of centrifugal force, along the roller slideway of lid on 4 to lid 4 medial movement, owing to being against, roller 23 covers that to cover 4 on 4 be fixed, displacement disc 2 is pushed to fixed tray 1 under the effect of weight arm 24, distance between fixed tray 1 and the displacement disc 2 is narrowed down, because of belt width certain, driving belt will be extruded towards the outer circular direction of wheel disc, and it is big that driving wheel becomes; Because the length of driving belt is certain, when driving wheel became big, driving belt can overcome pressure circular direction motion in follower of follower spring again, follower diminishes, and velocity ratio diminishes, and snowmobile becomes at a high speed, otherwise, when engine speed reduced, roller 23 is side shifting outside lid 4, and displacement disc 2 is opened, driving wheel diminishes, follower becomes big simultaneously, and it is big that velocity ratio becomes, and snowmobile becomes low speed.
Claims (6)
1. snowmobile stepless speed variator, comprise driving wheel, follower and the driving belt that is connected two-wheeled, described driving wheel has fixed tray (1) and the displacement disc (2) and the central shaft (3) of the band conical surface, described fixed tray (1) is fixed on central shaft (3) one ends, described displacement disc (2) slides on this central shaft (3), end at the close fixed tray (1) of displacement disc (2) is the wheel cover (21) of the band conical surface, extended axially central sleeve (22) from the interior middle part of the cover body of wheel cover (21), it is characterized in that: on the central shaft (3) between described fixed tray (1) and the displacement disc (2), also be with rolling bearing (9); On described displacement disc (2), circumferentially evenly be provided with two to four rolling (23), the bilateral symmetry of each roller (23) is provided with weight arm (24), big and the front end kink of the front end of weight arm (24) is on first bearing pin (25) of plug-in mounting roller (23), and little and rear end, the rear end of weight arm (24) is hinged on the end of central sleeve (22) by second bearing pin (26); Be fixed with the lid (4) of dried mushroom head away from an end of fixed tray (1) at described central shaft (3), the opening end of this lid (4) stretches in the described displacement disc (2) and with displacement disc (2) and is meshed by double wedge (44) and side of body post (27), the stage clip (5) that is enclosed within on the central shaft (3) also is housed in the central sleeve (22) of described displacement disc (2), and the roller (23) on the displacement disc (2) touches with the contacted inner surfaces that covers (4) under the effect of stage clip (5) all the time; On lid (4) internal surface, be provided with the roller slideway with the corresponding position of roller (23), this roller slideway is formed for the bevel phase that big end is positioned at opening end, be positioned at the inclination angle of inclined plane of the inclination angle of inclined plane in the outside greater than the inboard, when described displacement disc (2) rotated, described roller (23) can be fitted on the roller slideway under action of centrifugal force and be rolled and push displacement disc (2) to described fixed tray (1).
2. snowmobile stepless speed variator according to claim 1, it is characterized in that: central sleeve (22) endoporus of described displacement disc (2) is the shoulder hole that reduces successively, the big end of this shoulder hole is near described fixed tray (1), sliding the joining of spring seat (7) that its big stomidium tightens by axle sleeve (6) and central shaft (1), this spring seat (7) two ends offset with described rolling bearing (9) and stage clip (5) respectively; The small end step hole of shoulder hole is joined by ladder axle sleeve (8) and central shaft (1) are sliding, the enlarged diameter section of this ladder axle sleeve (8) and described small end step hole match, the reduced diameter section of ladder axle sleeve (8) stretches in the described stage clip (5), and the step of stage clip (5) end face and ladder axle sleeve (8) offsets.
3. snowmobile stepless speed variator according to claim 1, it is characterized in that: described roller (23) is two, roller (23) is joined by roller axle sleeve (23a) and described first bearing pin (25) are sliding, and this roller (23) is stretched out at the two ends of roller axle sleeve (23a) and extrusion equates.
4. according to claim 1 or 3 described snowmobile stepless speed variators, it is characterized in that: the diameter of described roller (23) is 28～35mm, and length is 18～25mm.
5. according to claim 1 or 3 described snowmobile stepless speed variators, it is characterized in that: the weight arm (24) of described roller (23) both sides is hook-type plates, its two is small one and large one circular arc, the orthodrome end of hook-type plate is through on described first bearing pin (25), the pitch-row that is used to install two pin-and-holes of first bearing pin (25) and second bearing pin (26) on described weight arm (24) is 38～45mm, and the thickness of slab of weight arm (24) is 10～15mm.
6. snowmobile stepless speed variator according to claim 1, it is characterized in that: be a times of inclination angle, inboard inclined-plane (42) at the inclination angle on described roller slideway inclined-plane, the outside (41), the inclination angle on this inclined-plane, inboard (42) is 10～20 °, and the and arranged on left and right sides of described roller slideway has two parallel Tiao Tu Zhu (43) along the inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101918255A CN101705981B (en) | 2009-12-08 | 2009-12-08 | Continuously variable transmission of snowmobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101918255A CN101705981B (en) | 2009-12-08 | 2009-12-08 | Continuously variable transmission of snowmobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101705981A CN101705981A (en) | 2010-05-12 |
| CN101705981B true CN101705981B (en) | 2011-08-03 |
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ID=42376225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101918255A Expired - Fee Related CN101705981B (en) | 2009-12-08 | 2009-12-08 | Continuously variable transmission of snowmobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101705981B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITUB20156895A1 (en) * | 2015-12-10 | 2017-06-10 | Piaggio & C Spa | TRANSMISSION DEVICE WITH CONTINUOUS CHANGE WITH CHANGE ADJUSTMENT DEVICE |
| DE102015225029B4 (en) * | 2015-12-14 | 2018-05-09 | Schaeffler Technologies AG & Co. KG | CVT |
| CN107289082B (en) * | 2016-03-30 | 2021-11-30 | 罗伯特·博世有限公司 | Conical ring type stepless gearbox |
| CN105987137A (en) * | 2016-07-08 | 2016-10-05 | 洛阳天迈传动科技有限公司 | Assistant centrifugal conical disc system |
| US10174827B2 (en) | 2017-02-21 | 2019-01-08 | Team Industries, Inc. | Drive clutch idle bearing torque drag assembly |
| JP6657274B2 (en) * | 2018-02-07 | 2020-03-04 | バンドー化学株式会社 | Weight roller, method for manufacturing the same, and mold used for manufacturing the weight roller |
-
2009
- 2009-12-08 CN CN2009101918255A patent/CN101705981B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101705981A (en) | 2010-05-12 |
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| C56 | Change in the name or address of the patentee |
Owner name: CHONGQING YONGFA TECHNOLOGY CO., LTD. Free format text: FORMER NAME: CHONGQING YONGFA MOTORCYCLE ACCESSORIES CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 400700 71 bridge, Beibei District, Chongqing Patentee after: Chongqing Yongfa Technology Co. Ltd. Address before: 400700 71 bridge, Beibei District, Chongqing Patentee before: Chongqing Yongfa Motorcycle Parts Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20141208 |
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