CN201502672U

CN201502672U - Novel stepless speed change mechanism

Info

Publication number: CN201502672U
Application number: CN2009201892104U
Authority: CN
Inventors: 黄陈才
Original assignee: ZHEJIANG KINON MACHINERY EQUIPMENT CO Ltd
Current assignee: ZHEJIANG KINON MACHINERY EQUIPMENT CO Ltd
Priority date: 2009-09-17
Filing date: 2009-09-17
Publication date: 2010-06-09
Anticipated expiration: 2019-09-17

Abstract

The utility model belongs to the technical field of the speed changer, relates to a novel stepless speed change mechanism, which is characterized in that a driving wheel fixed disc is fixed on a shaft sleeve of a driving shaft, a driving wheel with a conical groove is formed between the driving wheel fixed disc and a driving wheel movable disc, a driven wheel fixed disc is fixed on a driven shaft, a driven wheel with a conical groove is formed between the driven wheel fixed disc and a driven wheel movable disc, the driving wheel is connected with the driven wheel through a drive belt, a centrifugal block is arranged inside the driving wheel fixed disc and is hinged with a centrifugal block fixed plate, the centrifugal blocks are connected with each other through a pull spring, and the outer surface of the centrifugal block is provided with a friction sheet. The novel stepless speed change mechanism has the advantages that: the structure is simple and the speed variation is stable; since the driving wheel fixed disc is free from being directly connected with the driving shaft, the driving shaft only drives the centrifugal block fixed plate to idle when in starting, and after a given speed is realized, the friction sheet on the centrifugal block is contacted with the inner surface of the driving wheel fixed disc, so not only the starting torque is large, but also the energy can be saved.

Description

Novel stepless speed changing mechanism

Technical field

The utility model belongs to the speed changer technical field, refers in particular to a kind of novel stepless speed changing mechanism.

Background technique

Up to the present; the mechanical stepless speed changes drive mechanism that electric vehicle, electric bicycle etc. are numerous; its driving shaft all is directly to be connected with drive wheel assemblies; there is not centrifugal mechanism; when engine start; driving shaft directly drives whole drive wheel assemblies and rotates; the transmission device of this structure can send the noise of " sincere, sincere, sincere " usually when starting; illustrate that its moment that is subjected to can't start drive wheel assemblies greatly inadequately; and also and then motion together of driving belt when starting, make that the energy is insignificant to be slatterned.

Summary of the invention

The purpose of this utility model provides a kind of simple in structure, big, energy-conservation, novel stably stepless speed changing mechanism of speed change of startup torque.

The purpose of this utility model is achieved in that

Novel stepless speed changing mechanism, the driving wheel price fixing be fixed on the axle sleeve of driving shaft and and the driving wheel Moving plate between form a driving wheel with tapered groove, the follower price fixing be fixed on the driven shaft and and the follower Moving plate between form a follower with tapered groove, be arranged with driven axle sleeve on the driven shaft, the follower Moving plate can put slip and lean on spring to compress to follower price fixing direction at driven shaft, driving wheel is connected by driving belt with follower, the driving wheel Moving plate can be slided on axle sleeve by the extruding of the rolling element of driving wheel fixed plate restriction, be provided with the fixed plate that is fixed on the driving shaft in the cavity of the driving wheel price fixing relative with the belt grooves on the driving wheel, on fixed plate, circumferentially be hinged with uniform centrifugal, centrifugal outer surface is provided with friction plate, centrifugal is provided with centrifugal extension spring to axis direction tension, the power transmission that can rub of the internal surface of the cavity of the outer surface of friction plate and driving wheel price fixing.

As preferably, described centrifugal has three, is crescent shape, three through holes is arranged on each centrifugal, the through hole of centrifugal build portion and afterbody is the spring suspension hole, and the 3rd through hole of also close afterbody through hole is centrifugal hinging hole between the through hole of centrifugal build portion and afterbody.

As preferably, the end near the driving wheel price fixing between described driving shaft and the axle sleeve is provided with needle bearing, and the other end is provided with deep groove ball bearing.

As preferably, described driving wheel fixed plate radially progressively tilts to driving wheel Moving plate direction from inside to outside, and rolling element is placed between driving wheel fixed plate and the driving wheel Moving plate.

The outstanding compared to existing technology advantage of the utility model is:

1, because driving shaft of the present utility model is connected with centrifugal fixed plate, and centrifugal fixed plate be directly being connected with the driving wheel price fixing, when firm starting electrical machinery, driving shaft only dallies, and does not drive driving belt to move together, has saved the energy; After arriving certain rotating speed, centrifugal pulling force that overcomes extension spring under action of centrifugal force is thrown toward circumference, and friction plate and driving wheel price fixing rubbing contact on centrifugal drive the driving wheel motion immediately, it is big that this structure makes that driving wheel starts torque, the convenient startup and noise free.

2, of the present utility model simple in structure, speed change is steady, and is applicable in any mechanical stepless driving mechanism.

Description of drawings

Fig. 1 is a structure sectional view of the present utility model;

Fig. 2 is the connection diagram of centrifugal of the utility model.

Embodiment

The utility model is further described with specific embodiment below in conjunction with accompanying drawing, referring to Fig. 1-2:

Novel stepless speed changing mechanism, cone tank 101 of relative formation between driving wheel price fixing 11 and the driving wheel Moving plate 12, cone tank 201 of relative formation between follower price fixing 21 and the follower Moving plate 22, described cone tank 101, connect by driving belt 30 between 201, be provided with driven axle sleeve 23 in the driven shaft 20, one end of driven shaft 20 is fixed on the follower price fixing 21, the other end is connected with output block, on follower Moving plate 22, also be provided with spring abutment 40 and stage clip 41, described driving wheel price fixing 11 is conical surfaces with the relative face of driving wheel Moving plate 12, described follower price fixing 21 and follower Moving plate 22 relative faces are conical surfaces, be provided with centrifugal 50 of a plurality of crescent shape in the cavity of described driving wheel price fixing 11, centrifugal 50 outer surface is provided with friction plate 51, interconnect and be hinged on together on the centrifugal fixed plate 52 by connection set between described centrifugal 50, centrifugal fixed plate 52 is connected with driving shaft 10 keys by coning sleeve 521, driving shaft 10 runs through driving wheel price fixing 11 and the middle part of driving wheel Moving plate 12 and the end face that an end stretches out driving wheel fixed plate 60, driving shaft 10 is provided with driving shaft axle sleeve 70, the two ends of driving shaft axle sleeve 70 outsides are provided with recessed shoulder, inner close driving wheel price fixing end is provided with needle bearing 80, be provided with deep groove ball bearing 81 near driving wheel fixed plate end, described driving wheel fixed plate 60 radially progressively tilts to driving wheel Moving plate 12 directions from inside to outside, rolling element 90 is placed between driving wheel fixed plate 60 and the driving wheel Moving plate 12, described driving wheel fixed plate 60 and driving wheel price fixing 11 are separately positioned on the recessed shoulder of driving shaft axle sleeve 70 and by fixing device and fix, above-mentioned centrifugal 50 is three, be crescent shape, three through holes are arranged on each centrifugal 50, the through hole of centrifugal 50 head and afterbody is the spring suspension hole, between the through hole of centrifugal 50 head and afterbody and hinged by pin 53 and centrifugal fixed plate 52 near the 3rd through hole of afterbody through hole, centrifugal 50 above-mentioned of three crescent shape interconnect encloses a circle, makes that each centrifugal 50 centrifugal force that is subjected to is all identical.

Use of the present utility model: because driving shaft 10 directly is not connected with driving wheel price fixing 11, when motor just started, driving shaft 10 drove centrifugal fixed plate 52 and does the idle running of a period of time earlier; After driving shaft 10 arrives certain rotating speed, centrifugal 50 pulling force that overcomes extension spring 54 under action of centrifugal force is thrown toward circumference, friction plate 51 on centrifugal 50 tightly combines with the inner peripheral surface of driving wheel price fixing 11, driving wheel price fixing 11 is by driving shaft axle sleeve 70 under the effect of frictional force, driving wheel fixed plate 60, driving wheel Moving plate 12 drives driving belt 30 and together rotates, driving belt 30 drives follower price fixing 21 by frictional force action, follower Moving plate 22, driven axle sleeve 23 whole rotations just can drive other all kinds of output units that are connected with driven shaft 20; When driving shaft 10 rotating speeds improve once more gradually, rolling element 90 under action of centrifugal force along driving wheel fixed plate 60, driving wheel Moving plate 12 inclined-planes are thrown toward excircle, driving wheel Moving plate 12 is extruded to driving wheel price fixing 11 and here moves simultaneously, driving belt 30 is side shifting outside cone tank 101, be that driving belt 30 becomes big with the diameter that combines of cone tank 101, Dui Ying follower Moving plate 22 overcomes the elastic force of stage clip 41 away from follower price fixing 21 with it, driving belt 30 is to the medial movement of cone tank 201, be that driving belt 30 diminishes with the diameter that combines of cone tank 201, make driven shaft 20 obtain higher rotating speed; Otherwise when driving shaft 10 rotating speeds diminished, driving shaft 10 the driving belt 30 here diminished with the diameter that combines of cone tank 101, and driven shaft 20 the driving belt 30 here becomes big with the diameter that combines of cone tank 201, and the rotating speed of driven shaft 20 diminishes.

The foregoing description only is one of preferred embodiment of the present utility model; be not to limit protection domain of the present utility model according to this; so: all equivalences of doing according to structure of the present utility model, shape, principle change, and all should be covered by within the protection domain of the present utility model.

Claims

1. novel stepless speed changing mechanism, the driving wheel price fixing be fixed on the axle sleeve of driving shaft and and the driving wheel Moving plate between form a driving wheel with tapered groove, the follower price fixing be fixed on the driven shaft and and the follower Moving plate between form a follower with tapered groove, be arranged with driven axle sleeve on the driven shaft, the follower Moving plate can put slip and lean on spring to compress to follower price fixing direction at driven shaft, driving wheel is connected by driving belt with follower, it is characterized in that: the driving wheel Moving plate can be slided on axle sleeve by the extruding of the rolling element of driving wheel fixed plate restriction, be provided with the fixed plate that is fixed on the driving shaft in the cavity of the driving wheel price fixing relative with the belt grooves on the driving wheel, on fixed plate, circumferentially be hinged with uniform centrifugal, centrifugal outer surface is provided with friction plate, centrifugal is provided with centrifugal extension spring to axis direction tension, the power transmission that can rub of the internal surface of the cavity of the outer surface of friction plate and driving wheel price fixing.

2. novel stepless speed changing mechanism according to claim 1, it is characterized in that: described centrifugal has three, be crescent shape, three through holes are arranged on each centrifugal, the through hole of centrifugal build portion and afterbody is the spring suspension hole, and the 3rd through hole of also close afterbody through hole is centrifugal hinging hole between the through hole of centrifugal build portion and afterbody.

3. novel stepless speed changing mechanism according to claim 1 is characterized in that: the end near the driving wheel price fixing between described driving shaft and the axle sleeve is provided with needle bearing, and the other end is provided with deep groove ball bearing.

4. novel stepless speed changing mechanism according to claim 1 is characterized in that: described driving wheel fixed plate radially progressively tilts to driving wheel Moving plate direction from inside to outside, and rolling element is placed between driving wheel fixed plate and the driving wheel Moving plate.