CN2465976Y

CN2465976Y - Stepless speed change device for vehicle

Info

Publication number: CN2465976Y
Application number: CN 01220588
Authority: CN
Inventors: 田培棠; 田凌; 曾宇平; 韩雅苏
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-30
Filing date: 2001-03-30
Publication date: 2001-12-19
Anticipated expiration: 2011-03-30

Abstract

The utility model relates to a stepless speed changer for vehicles, which comprises an input shaft, an output shaft and a speed changer base. The utility model is characterized in that a driving cone is installed on the input shaft, wherein, one end of which is provided with splines; a planet cone is arranged in a holder; the two conical surfaces of the planet cone are supported by an automatic pressurizing mechanism below a tray and are respectively and closely contacted with the driving cone and a circular cone of a track; the circular cone of a track is fixed on a helical gear by fasteners; a worm screw is engaged with the helical gear; the lower end of the helical gear is connected with the base by screw threads; the tray is fixedly connected with the output shaft. The utility model has the advantages of simpler structure, convenient operation, stable operation, reliable operation, longer service life, etc.

Description

Stepless speed variator of vehicle

The utility model relates to a kind of change-speed box, particularly a kind of toric transmission that is mainly used in the vehicle such as motor bike, battery-driven car and mid-get car.

Existing self-propelled vehicle particularly employed change-speed box such as motor bike is voltage infinite speed variation, hydraulic stepless speed change etc., though can solve infinite variable speed basic problem, but still have that efficient is low, structure complexity, fluctuation of service etc., then there is the friction heating in existing Friction Stepless, skids, speed change shakiness, transmitted power need shortcomings such as big positive pressure, life-span be short when big.

The purpose of this utility model be exactly a kind of structure of design simple, use long stepless speed variator of vehicle of more convenient, stable and reliable operation, service life.

The purpose of this utility model realizes by following structure, it includes input shaft, output shaft and change-speed box pedestal, it is characterized in that: the initiative taper dress at one end has on the input shaft of spline, the planet awl is in retainer, the follow-up pressure mechanism of two conical surfaces below pallet of planet awl holds up and is fixed on the helical wheel by fastener with initiative taper, orbit circular cone ring closed contact, orbit circular cone ring respectively, worm screw and helical wheel engagement, helical wheel lower end and pedestal screwed connection, pallet and output shaft are affixed.

Principle of work of the present utility model is as follows: the initiative taper dress at one end has on the imput shaft of spline, the planet awl is contained in the hole of retainer, orbit circular cone ring then uses four screw retention on helical wheel, and keep flexibly connecting with two rubber grommets, pallet is under two responsive to axial force that give tight power and produced by the follow-up pressure mechanism that pallet, steel ball, compression relief cam are formed to the disk spring of dress, the planet awl is tightly contacted with initiative taper, orbit circular cone ring, and produce certain positive pressure in each contact position.

When imput shaft is rotated, the friction force that positive pressure produces rotates initiative taper band planet awl, because orbit circular cone ring is fixed, so the rotation of planet awl one side is simultaneously revolved round the sun, make pallet obtain reduction of speed and rotate, and motion is reached output shaft by follow-up pressure mechanism.

During speed governing, rotary worm rotates the helical wheel that is engaged with, because the helical wheel lower end is threaded and screws on fixed pedestal, so helical wheel also lifting in rotation, make of the radius change of the contact point of orbit circular cone ring and planet awl, thereby reach the purpose of speed governing to planet axis of cone line.Backing pin system prevents that orbit circular cone ring from boring to disengage with planet and is provided with.

The utility model compared with prior art have structure simple, use advantages such as more convenient, stable and reliable operation and service life is long.

Description of drawings of the present utility model is as follows:

Fig. 1 is the structural representation of two embodiment of the present utility model;

Axis with imput shaft, driven shaft among Fig. 1 is as the criterion, and the left side is that planet awl, initiative taper and pallet are made the finishing bevel gear cuter engaging structure, i.e. first embodiment; The right side is that planet awl, initiative taper and pallet are made smooth closed contact, i.e. second embodiment.

Among the figure: 1. rotary worm; 2. helical wheel; 3. rubber grommet; 4. orbit circular cone ring; 5. planet is bored; 6. input shaft; 7. initiative taper; 8. retainer; 9. backing pin; 10. backing pin; 11. pallet; 12. steel ball; 13. steel ball bracing frame; 14. output shaft; 15. disk spring; 16. compression relief cam; 17. pedestal; 18. screw; 19. cover.

The utility model is described in further detail below in conjunction with drawings and Examples:

As shown in Figure 1, the utility model includes input shaft 6, output shaft 14 and change-speed box pedestal 17, it is characterized in that: initiative taper 7 dresses at one end have on the input shaft 6 of spline, planet awl 5 is in retainer 8, the follow-up pressure mechanism of two conical surfaces of planet awl below pallet 11 holds up and is fixed on the helical wheel 2 by fastener 18 with initiative taper 7, orbit circular cone ring 4 closed contacts, orbit circular cone ring 4 respectively, worm screw 1 and helical wheel 2 engagements, helical wheel lower end and pedestal screwed connection, pallet and output shaft 14 are affixed.

Principle of work of the present utility model is as follows: shown in the axis right side of Fig. 1, initiative taper 7 dresses at one end have on the imput shaft 6 of spline, planet awl 5 is contained in the hole of retainer 8,4 of orbit circular cone rings are fixed on the helical wheel 2 with four screws 18, and keep flexibly connecting with two rubber grommets 3, pallet 11 two to the dress disk spring 15 give tight power and by pallet 11, steel ball 12, under the responsive to axial force that the follow-up pressure mechanism that compression relief cam 16 is formed is produced, make planet awl 5 and initiative taper 7, orbit circular cone ring 4 tightly contacts, and produces certain positive pressure in each contact position.

When imput shaft 6 rotations, the friction force that positive pressure produces rotates initiative taper 7 band planet awls 5, because orbit circular cone ring 4 is fixed, so the 5 one side rotations of planet awl are simultaneously revolved round the sun, make pallet 11 obtain reduction of speed and rotate, and motion is reached output shaft 14 by follow-up pressure mechanism.

During speed governing, rotary worm 1 rotates the helical wheel 2 that is engaged with, because helical wheel 2 lower ends are threaded and screw on fixed pedestal 17, so helical wheel 2 also lifting in rotation, make of the radius change of the contact point of orbit circular cone ring 4 and planet awl 5, thereby reach the purpose of speed governing to planet axis of cone line.Backing pin 9,10 is to prevent from that orbit circular cone ring 4 from disengaging with planet awl 5 to be provided with.

As shown in Figure 1, the rubber grommet 3 that flexibly connects is arranged between orbit circular cone ring 4 and the helical wheel; Behind pedestal and helical wheel upper planet awl, backing pin 9,10 is arranged.

As shown in Figure 1, follow-up pressure mechanism is by constituting at the compression relief cam on the pedestal 16, steel ball 12 and the spring under pallet 11.Spring is two disk springs 15 to dress.

Shown in the imput shaft axis left side among Fig. 1, planet awl 5 is the tooth engagement with initiative taper 7, pallet 11.

Shown in the right of the imput shaft axis among Fig. 1, planet awl 5 is smooth closed contact with initiative taper 7, pallet 11.

Because there is certain shortcoming in pure frictional transmission, as skid, transmitted power needs big positive pressure etc. when big, so the contact surface of initiative taper 7 and planet awl 5 can be made the outer finishing bevel gear cuter that is meshed, the inner conical surface of Jie Chu pallet 11 is made the internal bevel gear that is meshed with it, shown in the left side, Fig. 1 axis.Because engagement does not need positive pressure,, replace and use cover 19 instead so frictional transmission does not need disk spring 15 and follow-up pressure mechanism etc. all can cancel.During work, the friction face of its stressed maximum (initiative taper 7 is bored 5 male cone (strobilus masculinus)s with planet, planet is bored 5 male cone (strobilus masculinus)s and pallet inner conical surface) replaces by intermeshing bevel-gear pair.And the axial force that finishing bevel gear cuter engagement produces make the smooth male cone (strobilus masculinus) of planet awl 5 and orbit circular cone ring near.Its transmission principle is same as described above.

Claims

1. stepless speed variator of vehicle, it includes input shaft (6), output shaft (14) and change-speed box pedestal (17), it is characterized in that: initiative taper (7) dress at one end has on the input shaft (6) of spline, planet awl (5) is in retainer (8), the follow-up pressure mechanism of two conical surfaces of planet awl below pallet (11) holds up respectively and initiative taper (7), orbit circular cone ring (4) closed contact, orbit circular cone ring (4) is fixed on the helical wheel (2) by fastener (18), worm screw (1) and helical wheel (2) engagement, helical wheel lower end and pedestal screwed connection, pallet and output shaft (14) are affixed.

2. stepless speed variator of vehicle as claimed in claim 1 is characterized in that: the rubber grommet (3) that flexibly connects is arranged between orbit circular cone ring (4) and the helical wheel.

3. stepless speed variator of vehicle as claimed in claim 1 is characterized in that: behind pedestal and helical wheel upper planet awl backing pin (9,10) is arranged.

4. stepless speed variator of vehicle as claimed in claim 1 is characterized in that: follow-up pressure mechanism is by constituting at the compression relief cam on the pedestal (16), steel ball (12) and the spring under pallet (11).

5. stepless speed variator of vehicle as claimed in claim 4 is characterized in that: spring is two disk springs (15) to dress.

6. stepless speed variator of vehicle as claimed in claim 1 is characterized in that: planet awl (5) is the tooth engagement with initiative taper (7), pallet (11).

7. stepless speed variator of vehicle as claimed in claim 1 is characterized in that: planet awl (5) is smooth closed contact with initiative taper (7), pallet (11).