CN101644312A

CN101644312A - Continuously variable transmission

Info

Publication number: CN101644312A
Application number: CN200810134990A
Authority: CN
Inventors: 范泽林
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-08
Filing date: 2008-08-08
Publication date: 2010-02-10

Abstract

The invention relates to a continuously variable transmission (CVT), which is changed into non-friction tooth-mesh transmission from friction transmission. The continuously variable transmission has asimple structure, wherein only a plurality of positive and negative pawls or a plurality of long-short ratchet wheel type grooves are arranged on cone-shaped plates on two sides of a driving wheel and a driven wheel; the two sides or the bottom surface of a flexible piece (including a chain, a belt or a rope type chain belt) are provided with a plurality of pawls or a plurality of ratchet wheel type grooves; and the pawls are telescopic, are meshed with each other sequentially or randomly, and achieve the non-friction tooth-mesh transmission by meeting a concave gear.

Description

Stepless speed variator

Affiliated technical field

The present invention relates to a kind of stepless speed variator teeth engaging method transmission device, especially a kind of flexible ratchet is met and is recessed into tooth method engagement driving.

Background technique

At present, known CTV stepless speed variator is a kind of friction type drive method, and its shortcoming is easily to skid, and moment of torsion is little, can not adapt to heavy truck and industrial large torque stepless speed changer, and the accuracy of manufacturing difficulty is big, costs an arm and a leg.Also have and adopt the slide plate movable-tooth stepless speed transmission on a kind of principal and subordinate's drive wheel.Its feature is that several slide plates utilize the extended chance tooth of centrifugal force grooving methods of engagement, and shortcoming is that slide plate is thin, monolithic intensity is little, and the stressed opportunity of monolithic is very big, fragile.

Summary of the invention

Existing CTV stepless speed variator easily skids, moment of torsion is little, flimsy shortcoming in order to overcome, the invention provides a kind of stepless speed changes devices of ratchet methods of engagement, this ratchet methods of engagement is not only non-slip, can also adapt to high pulling torque, and price is low, gear ratio is wide can adaptation various weights, automobile and industrial stepless change.

The technical solution adopted for the present invention to solve the technical problems is: at main driving wheel, driven drive wheel and middle spaced winding spare (comprising metal and nonmetal, chain, band, cable type chain belt), contact with several length grooves (also can be described as ratchet-type) by several positive and negative ratchets, ratchet has tension force to stretch, meet protruding the retraction, meet recessed stretching into, promptly meet and be recessed into tooth, be non-friction driving.Ratchet is set to forward, reverse, forward and reverse combination, middle spaced winding spare characteristics be driven be again the branch left and right sides initiatively, so must be provided with forward, oppositely ratchet or forward, inverted groove.

About initiatively driven on four conical disks or on the middle reducing bridge ratchet is set or the ratchet-type groove all can, no matter ratchet is set or the ratchet-type groove is set, about each dish as unidirectional groove is set, just form follower and can surmount driving wheel, as about several two-way ratchet bidirectional grooves are set on each conical disks or the reducing bridge, forward and reverse two kinds of ratchets are set respectively around about the property part, just become follower and can not surmount driving wheel.

The invention has the beneficial effects as follows: only needing principal and subordinate's wheel on the existing C TV speed changer and on the property part, setting up several ratchets, just can realize non-friction teeth engagement driving with several grooves are complementary, simple in structure, easy manufacturing, cost is low.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the right circular cone dish of the orderly groove driving wheel of several length of a present invention schematic representation.

Fig. 2 is ratchet of the present invention and groove coupling mesh schematic representation.

Fig. 3 is a cable type chain belt three-view diagram.

Fig. 4 is cable type chain belt both sides ratchet schematic representation.

Fig. 5 is a reducing bridge schematic representation in the middle of the drive wheel two awl dishes.

Fig. 6 is reducing bridge side ratchet or groove cut-away view.

Fig. 7 is that several two-way grooves arbitrarily mesh No overtaking clutch conical dish schematic representation.

Fig. 8 is several, and but single forward groove arbitrarily meshes overdrive clutch circular cone dish schematic representation.

Among the figure 1, the right circular cone dish of driving wheel; 2, long recess sectional drawing; 3, lack the groove sectional drawing; 4, two-way groove; 5, single inverted groove; 6, single forward groove; 7, two straight cutting ratchets; 8, spring; 9, single straight cutting forward ratchet; 10, monocline is inserted the forward ratchet; 11, monocline is anti-inserted to ratchet; 12, the reverse ratchet of single straight cutting; 13, reducing bridge; 14, the plan view of cable type chain belt three-view diagram; 15, left view; 16, plan view; 17, I-shape beam; 18, rubber pad; 19, wire rope.

Embodiment

In Fig. 1, the right circular cone dish (1) of driving wheel, arrow points is changeed clockwise, top long recess sectional view (2), short recessed Cao's sectional view (3) all belongs among Fig. 2, single forward groove (6), with among Fig. 4, middle spaced winding spare, the single reverse ratchet of straight cutting in cable type chain belt right side (12) is meshed, and is the wheel Transmitted chains.The single inverted groove (5) in follower right side, mutually meshing with the single straight cutting forward ratchet in cable type chain belt right side (9), be chain roller.For better understand conform to the principle of simplicity to concentrate the talk of: driving wheel, follower, around property part left side ratchet and groove should with the right side setting that matches.But this example is driven overdrive clutch drive method.For example: the two-way groove (4) among Fig. 2 is adopted in driving wheel, the follower left and right sides, adopts two straight cutting ratchets (7) or single straight cutting forward ratchet (9) among Fig. 2 to merge use with the reverse ratchet of single straight cutting (12) around the property part, is the drive method of No overtaking clutch.

In Fig. 1, the long recess of long recess sectional view (2), the short groove of short groove sectional view (3) is according to around the ratchet track when conical disks is rotated reducing from inside to outside or from outside to inside of several equidistant ratchets on the property part, presses the orderly groove that rule are provided with after combing.

With reference to Fig. 7, two-way groove (4) is recessed into tooth and arbitrarily meshes by meeting around property part several pairs straight cutting ratchets (7) and dual-cavity (4) on several length radioactive rays, and ratchet is met protruding retraction, meets recessed stretch into promptly to meet be recessed into tooth, be No overtaking clutch rotation.

With reference to Fig. 8, the single forward groove (6) that is provided with on several radioactive rays is arbitrarily engagement with several equidistant single oppositely ratchets (5), during rotation, from the kinetic energy overdrive clutch.

Claims

1, a kind of stepless speed variator, mainly by driving wheel, follower, form around property part (chain, band, cable type chain belt), hydraulic system, ratchet and recessed Cao, it is characterized in that: driving wheel, follower are to contact with several length grooves by several positive and negative ratchets to form the method engagement driving that the ratchet chance is recessed into tooth with middle spaced winding spare.

2, several ratchets of stepless speed variator according to claim 1 is characterized in that: straight tension force or diagonal tension, and can stretch and can contract.

3, several ratchets of stepless speed variator according to claim 1, its domestic animal is levied and is: forward, reverse, forward and reverse associated methods transmission.

4, stepless speed variator according to claim 1 is met the spill that is recessed into tooth, and it is characterized in that: unidirectional shape, two-way shape, single-direction and dual-direction are in conjunction with shape.

5, several ratchets of stepless speed variator according to claim 1 and several grooves are established the position, it is characterized in that: driving wheel, follower all can be provided with ratchet or groove around side, property part bottom surface.

6, stepless speed variator according to claim 1 is characterized in that around the property part: chain, band or cable type chain belt, metal and nonmetal all can.

7, several ratchets of stepless speed variator according to claim 1 and several engagement is characterized in that: mesh overdrive clutch or non-overdrive clutch in order or arbitrarily.