CN100472094C

CN100472094C - Large-torque continuously variable transmission

Info

Publication number: CN100472094C
Application number: CNB2006101535818A
Authority: CN
Inventors: 贾新成
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-12
Filing date: 2006-09-12
Publication date: 2009-03-25
Anticipated expiration: 2026-09-12
Also published as: CN101050801A

Abstract

The large torque stepless speed variator is a kind of chain transmission stepless speed variator. The invention relates to a continuously variable transmission which has large transmission torque, is suitable for large buses and trucks, and is also suitable for self-walking machines such as tractors, loaders and the like. The invention aims to greatly improve the contact friction surface of a chain. The working surface of each chain plate of the chain [1] is designed into a trapezoidal friction bulge with a longitudinal radian and a cross section, so that one chain [1] can have dozens of trapezoidal friction bulges. Dozens of friction blocks [2] are uniformly distributed in the chain wheel [3] in the inner direction, dozens of conical friction grooves are arranged on each friction block [2], and the trapezoidal friction bulge of the chain [1] is contacted with the conical friction grooves of the friction blocks [2] to generate friction force. Because of dozens of friction bulges and friction grooves, a large friction force can be generated. When the rotating speed is high, the friction block [2] generates a large centrifugal force, and the centrifugal force of part of the friction block [2] is counteracted by the herb of common Forsythia [14] for the purpose.

Description

Large torque stepless speed changer

Large torque stepless speed changer is a kind of chain transmission stepless speed variator.

Technical field: the present invention relates to stepless speed variator, its transmitting torque is big, is fit to big bus and truck, also should be fit to from walking machinery, as tractor, loader etc.It is too high that but large torque stepless speed changer is not suitable for input speed, because it is to the centrifugal force sensitivity.

Background technique: 2002 7 phases " automotive engineering " magazine has been delivered " Audi's stepless speed variator brief introduction " this speed changer and has been leaned on the pintle of chain to contact transferring power with trapezoidal dish, its moment of torsion N.m310, input power KW162, for stepless speed variator, such performance has been fine, because it is too little that chain pin changes the power surface of contact, moment of torsion transmits not too large.

Summary of the invention: the objective of the invention is to improve greatly chain contact friction face.Way is that pintle friction power transmission is changed into carrier bar friction power transmission.Each carrier bar working surface of chain is designed to vertical radian, the trapezoidal friction protrusion of cross section, and such chain just has tens trapezoidal sassafras projectioies of rubbing.The sprocket wheel back warp has tens trapezoidal frictional grooves to uniform tens brake pads on each brake pad, the trapezoidal friction groove of the trapezoidal friction protrusion of chain and brake pad contacts and produces friction.Because of tens friction protrusion and frictional groove are arranged, so can produce very big frictional force.Brake pad produced very big centrifugal force when rotating speed was high, had designed the low part centrifugal force that disappears of flat Heng piece for this reason.

Description of drawings: Fig. 1 tectonic maps of the present invention;

Fig. 2 is the plan view of Fig. 1;

Fig. 3 is the chain plan view;

Fig. 4 is the plan view of Fig. 3;

Fig. 5 is the brake pad plan view;

Fig. 6 is the plan view of Fig. 5;

See that Fig. 1 is shown in Figure 2: large torque stepless speed changer has: chain 1, brake pad 2, sprocket wheel 3, sprocket wheel chute 4, Control panel 5, control panel curved groove 6, control panel compensating groove 7, force transmiting disk 8, force transmiting disk compensating groove 9, spline housing 10, external splines 12, cylinder sleeve 13, balance weight 14 in piston 11, the piston end surface.

Last force transmiting disk [8] internal diameter is connected with the axle spline, external diameter is connected with sprocket wheel [3] screw, and following force transmiting disk [8] external diameter is connected with the sprocket wheel screw, end face is connected with cylinder sleeve 13 screws, and cylinder sleeve 13 is connected with the axle spline.Up and down two control panels 5 between force transmiting disk 8 and sprocket wheel 3, internal diameter is connected with the external splines of spline housing 10.The internal diameter of spline housing 10 is oblique splines, the end face of piston 11 have the internal spline gradient of external splines 12 in the piston end surface, external splines and spline housing 10 identical, and and the internal spline of spline housing 10 movingly, internal spline and axle spline movingly.If piston 11 moves up and down, external splines 12 will make spline housing 10 rotate relative to axle in the piston end surface, reaches control panel 5 relative sprocket wheel 3 force transmiting disks 8 purpose rotationally.Two sprocket wheels 3 have radially corresponding 24 uniform sprocket wheel chutes 4, adorning the brake pad 2 of 24 radial equipartitions in these sprocket wheel chutes 4, the controlled again tortuous wire casing 6 in the two ends of these brake pads 2 is controlled, if control panel 5 rotates relative to sprocket wheel 3,24 control panel curvilinear grooves 6 will make 24 brake pads 2 in the 4 inter-sync radial motions of sprocket wheel chute, the sprocket wheel working diameter is changed, reach the speed change purpose.Each carrier bar working surface of chain 1 is processed into vertical radian, the trapezoidal friction protrusion of cross section, see Fig. 3 Fig. 4 by the chain 1 that such carrier bar is formed with regard to becoming the chain that tens trapezoidal friction protrusion are arranged, there is trapezoidal frictional groove to see Fig. 5 Fig. 6 on the brake pad 2, tens trapezoidal friction protrusion of chain 1 contact with tens trapezoidal frictional grooves on the brake pad 2 and transmit frictional force, and power transmission is than big many of single groove power transmission like this.Because the centrifugal force of brake pad 2 is very big when high rotating speed, so designed equilibrium block 14 and control panel compensating groove 7 force transmiting disk compensating grooves 9 are seen Fig. 1 Fig. 2, two kinds of compensating groove gradients are opposite, and equilibrium block 14 utilizes compensating groove to offset the centrifugal force of partial frictional piece 2, make and control easily.

Specific embodiments:

1, manufacture and design testing machine, by testing machine is furtherd investigate, the problem of finding out is dealt with problems, and makes it reach requirement.

2, exploitation electro-hydraulic control section, this part foreign technology is ripe domesticly also to be fruitful.

3, a kind of brand-new stepless speed variator of exploitation needs the powerful assurance of technology and fund aspect.

Claims

1, large torque stepless speed changer, comprise: chain { 1}, brake pad { 2}, sprocket wheel { 3}, sprocket wheel chute { 4}, control panel { 5}, control panel curvilinear groove { 6}, force transmiting disk { 8}, spline housing { 10}, piston { 11}, external splines { 12} in the piston end surface, { the 8} internal diameter is connected with the axle spline last force transmiting disk, { the 3} screw is connected external diameter with sprocket wheel, { { the 3} screw is connected the 8} external diameter following force transmiting disk with sprocket wheel, end face is connected with the cylinder sleeve screw, cylinder sleeve is connected with the axle spline, { { 8} and sprocket wheel are { between the 3} at force transmiting disk for 5} for two control panels up and down, { external splines of 10} is connected internal diameter with spline housing, the internal diameter of spline housing is oblique spline, { end face of 11} has external splines { 12} in the piston end surface to piston, the internal spline gradient of the external splines of piston end surface and spline housing is identical, and and the internal spline of spline housing movingly, the internal spline of piston end surface and axle spline are movingly, it is characterized in that { 1} changes described chain on the basis of silent chain, the teeth of each carrier bar have been made into vertical radian, transversal trapezoidal fricting working surface, { 1} just becomes a chain that the trapezoidal fricting working surface of a lot of bars is arranged to chain like this.

2,, it is characterized in that described brake pad { has on the 2} cambered surface and chain { the trapezoidal frictional groove of 1} correspondence according to the described large torque stepless speed changer of claim 1.

3, according to claim 1 or 2 described large torque stepless speed changers, it is characterized in that piston the back and forth movement of 11}, by external splines in the piston end surface 12} make spline housing 10} and control panel 5} relatively axle, force transmiting disk { { 3} rotates, and { 6} just can { { thereby 2} controls and makes { the synchronous radial motion of 2} of whole brake pads the brake pad in the 4} dozens of control panel curvilinear groove dozens of sprocket wheel chute for 8} and sprocket wheel.