CN201258954Y

CN201258954Y - Automatic infinite variable speed mechanism

Info

Publication number: CN201258954Y
Application number: CNU2008201059977U
Authority: CN
Inventors: 田立峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-23
Filing date: 2008-09-23
Publication date: 2009-06-17
Anticipated expiration: 2018-09-23

Abstract

The utility model discloses an automatic stepless speed change device which comprises a power shaft, a driving wheel disc fixed on the power shaft, a driven power wheel disc, an intermediate movable pulley which can freely slide along the axial direction of the power shaft, and an intermediate gearing used for transmitting the power of the driving wheel disc to the driven power wheel disc, wherein, the intermediate movable pulley consists of two parts which can relatively rotate; a connecting rod is respectively articulated between the intermediate movable pulley and the driving wheel disc as well as between the intermediate movable pulley and the driven power wheel disc; a spring is arranged on the power shaft between the driven power wheel disc and the intermediate movable pulley; the two parts of the intermediate movable pulley respectively form a driving power wheel and a driven power wheel together with the adjacent driving wheel disc and driven power wheel disc, and the driving power wheel and the driven power wheel are respectively connected with the intermediate gearing by a transmission belt. The diameters of the driving power wheel and the driven power wheel can be regulated in real time according to the torque moment when in riding, so that stepless speed change is realized. The automatic stepless speed change device has the characteristics of small volume, simple structure and convenient maintenance; machine parts are difficult to wear, and have long service life.

Description

Automatic stepless speed-changing device

Technical field

The utility model relates to a kind of speed change gear, especially a kind of automatic stepless speed-changing device.

Background technique

The multi-speed bicycle of Chu Shouing in the market, be sprocket wheel and chain transmission mostly, side at bicycle is equipped with the number of teeth one group of sprocket wheel that more or less, stir the variation that chain changes the size generation speed ratio of chain institute chaining wheel by gear change hand lever, make bicycle change the speed of advancing, adapt to needs as different road conditions such as climb and falls.But the shortcoming of sprocket wheel chain transmission gear shift is: ride energetically, or speed change is frequent, chain wear, distortion are caused in the capital, it is lubricated not do maintenance under the situation of sneaking into muddy water for a long time, chain is aging to get rusty, to cause speed change inaccurate, and 20% all can the losing because of the friction of chain of human body acting; Before and after the speed change backguy since lack lubricated, will with the metallic sheath of outside because of oxidation and rusting, cause speed change difficulty or speed change not in place, roughly before and after the replacing frequency of speed change backguy be 5 months/times, extremely inconvenient user; The front and back speed change gear is in stirring the chain speed-change process, for a long time by chain wear, simultaneously because of causing and can not stir under the situation of sneaking into muddy water for a long time, or stir not in place, cause chain and gear wear, it changes frequency is 2 years/time, increases Consumer's user cost; Can not be according to the automatically real-time speed change of the actual process of riding, if the bicycler, speed change is untimely when going up a slope, except the effort of riding, high pulling torque output is damage high tap position part easily.The gear speed change that has in the past needs a large amount of gear and lubrication system mostly, realizes speed change, and its shortcoming is apparent.

The model utility content

The utility model technical issues that need to address provide a kind of can be according to actual riding condition automatic speed changing, volume is little, simple in structure, parts are not easy to wear, long service life and the bicycle use automatic stepless speed-changing device that is easy to safeguard.

For addressing the above problem, technical solution adopted in the utility model is: a kind of automatic stepless speed-changing device, comprise line shaft, be fixed on the active wheel disc on the line shaft, driven wheel disc, the middle movable pulley that can axially be free to slide along line shaft, be used for active wheel disc transmission of power is given the intermediate gearing of driven wheel disc, wherein, middle movable pulley is made up of relatively turnable two-part, be hinged with connecting rod respectively between middle movable pulley and active wheel disc and the driven wheel disc, on the line shaft between driven wheel disc and the middle movable pulley, also be provided with spring, two-part of middle movable pulley respectively with adjacent active wheel disc, driven wheel disc constitutes main power wheel and from motive power wheel, main power wheel be connected with intermediate gearing by driving belt respectively from motive power wheel.

The quantity of described connecting rod 5, connecting rod 6 is at least 2 respectively.

Described intermediate gearing comprises pedestal, follower and by the driving wheel of bearing fixing on pedestal, its driving wheel is the belt wheel that is provided with internal tooth, follower is the belt wheel that is provided with external tooth, by the end of bearing fixing at " Z " font bent axle, be meshed with the internal tooth of driving wheel, on pedestal, its bearing axis overlaps with the fixing bearing axis of driving wheel the other end of " Z " font bent axle by bearing fixing.

Described intermediate gearing comprises pedestal, driving wheel, follower and by the internal gear with axis of bearing fixing on pedestal, its driving wheel is common belt wheel, be fixed on the internal gear axis, follower is the belt wheel that is provided with external tooth, by the end of bearing fixing at " Z " font bent axle, be meshed with the internal tooth of internal gear, on pedestal, its bearing axis overlaps with the bearing axis of fixed annulus axis the other end of " Z " font bent axle by bearing fixing.

Described axis and internal gear with internal gear of axis can be one, or axis and internal gear are assembled into.

Adopt the beneficial effect that technique scheme produced to be: basis is novel to be exported transmission of power by intermediate gearing, main power wheel and adjust in real time from the diameter of the motive power wheel torque when riding, thereby realization stepless change, these novel complex appts such as accurate planetary pinion, handle timing chain wheels of removing from, it is less to have volume, simple in structure, characteristics easy to maintenance, parts are not easy to wear, long working life.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the schematic representation of the utility model when being operated in the speed governing state

Fig. 3 is the utility model intermediate gearing structural representation.

Wherein: 1, line shaft, 2, wheel disc initiatively, 3, driven wheel disc, 4, middle movable pulley, 5, connecting rod, 6, connecting rod, 7, spring, 8, driving belt, 9, pedestal, 10, follower, 11, driving wheel, 12, bent axle, 13, internal gear.

Embodiment

Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:

As shown in Figure 1, this novel line shaft 1 that comprises, be fixed on the active wheel disc 2 on the line shaft, driven wheel disc 3, the middle movable pulley 4 that can axially be free to slide along line shaft 1, be used for active wheel disc 2 transmission of power are given the intermediate gearing of driven wheel disc 3, wherein, middle movable pulley 4 is made up of relatively turnable two-part, be hinged with connecting rod 6 between the left side of middle movable pulley 4 and the driven wheel disc 3, formation is from motive power wheel, be connected with intermediate gearing by driving belt 8, be hinged with connecting rod 6 between the right side of middle movable pulley 4 and the active wheel disc 2, constitute main power wheel, be connected with intermediate gearing by driving belt 8, on the line shaft 1 between driven wheel disc 3 and the middle movable pulley 4, also be provided with spring 7, intermediate gearing is by pedestal 9, follower 10 and form by the driving wheel 11 of bearing fixing on pedestal, its driving wheel 11 is for being provided with the belt wheel of internal tooth, follower 10 is for being provided with the belt wheel of external tooth, and by the end of bearing fixing at " Z " font bent axle 12, be meshed with the internal tooth of driving wheel 11, the other end of " Z " font bent axle 12 by bearing fixing on pedestal 9, in order to guarantee that follower 10 is meshed with the internal tooth of driving wheel 11 all the time, the bearing axis of its fixed crankshaft 12 on pedestal 9 overlaps with the fixing bearing axis of driving wheel 11, i.e. coaxial line; Certainly intermediate gearing can also have other structural type, as shown in Figure 3, difference among intermediate gearing described in Fig. 3 and Fig. 1 is, follower 10 and internal gear 13 engagements, internal gear 13 is for having the internal gear of axis, driving wheel 11 is common belt wheel, be fixed on the axis of internal gear 13, simultaneously internal gear 13 utilize axis by bearing fixing on pedestal 9; Form structure for two kinds of Fig. 3 and just this novel intermediate gearing shown in Figure 1, certainly, other structure that satisfies condition can also be arranged, in actual design process, can adjust the diameter proportion between intermediate gearing driving wheel 11 and the follower 10 as required, reach different needs.

This is novel under original state, initiatively wheel disc 2 and connecting rod 5 between the middle movable pulley 4 are in that being extruded fell becomes the angle state with card, and that driven wheel disc 3 and connecting rod 6 between the middle movable pulley 4 are propped by the elastic force of spring 7 is vertical with card, as shown in Figure 1, when being in this kind state, riding speed will be the fastest.

This novel user mode as shown in Figure 2, connecting rod 5 when 2 rotations of active wheel disc between active wheel disc 2 and the middle movable pulley 4 is propped up, connecting rod between driven wheel disc 3 of another side and the middle movable pulley 46 is because rotation is extruded the also pressure spring 7 that fell simultaneously, driven wheel disc 3 and middle movable pulley 4 form from motive power wheel with under the drive of driving belt 8, the main power wheel of forming along with active wheel disc 2 and middle movable pulley 4 rotates and rotates, because the difference of torsion, the difference of the power of promptly riding, movable pulley 4 horizontally slipped on line shaft 1 in the middle of connecting rod 5 and connecting rod 6 promoted in the process of propping and falling, thereby make wheel disc 2 initiatively change along with the different of torsion with gap between the middle movable pulley 4, variation is followed in gap between driven wheel disc 3 and the middle movable pulley 4 simultaneously, driving belt 8 and active wheel disc 2 have so just been changed, driven wheel disc 3, the Pitch radius of middle movable pulley 4 contacts reaches the purpose of speed change transmission.

Because the interior spring 7 of driven wheel disc 3 and middle movable pulley 4 load of degree and driven wheel disc 3 by compression is relevant, so when load increases (such as going up a slope), spring 7 compression aggravations, the speed change moment of torsion strengthens, and output speed slows down, otherwise (such as descending), spring 7 compressions reduce, the speed change moment of torsion reduces, and output speed strengthens, thereby reaches the purpose according to loaded automatic gearshift.

Claims

1, a kind of automatic stepless speed-changing device, it is characterized in that: comprise line shaft (1), be fixed on the active wheel disc (2) on the line shaft (1), driven wheel disc (3), the middle movable pulley (4) that can axially be free to slide along line shaft (1), be used for active wheel disc (2) transmission of power is given the intermediate gearing of driven wheel disc (3), wherein, middle movable pulley (4) is made up of relatively turnable two-part, be hinged with connecting rod (5) respectively between middle movable pulley (4) and active wheel disc (2) and the driven wheel disc (3), (6), on the line shaft (1) between driven wheel disc (3) and the middle movable pulley (4), also be provided with spring (7), two-part of middle movable pulley (4) respectively with adjacent active wheel disc (2), driven wheel disc (3) constitutes main power wheel and from motive power wheel, main power wheel be connected with intermediate gearing by driving belt (8) respectively from motive power wheel.

2, automatic stepless speed-changing device according to claim 1 is characterized in that the quantity of described connecting rod (5), connecting rod (6) is at least 2 respectively.

3, automatic stepless speed-changing device according to claim 1, it is characterized in that described intermediate gearing comprises pedestal (9), follower (10) and by the driving wheel (11) of bearing fixing on pedestal, its driving wheel (11) is for being provided with the belt wheel of internal tooth, follower (10) is for being provided with the belt wheel of external tooth, by the end of bearing fixing at " Z " font bent axle (12), be meshed with the internal tooth of driving wheel (11), on pedestal (9), its bearing axis overlaps with the fixing bearing axis of driving wheel (11) the other end of " Z " font bent axle (12) by bearing fixing.

4, automatic stepless speed-changing device according to claim 1, it is characterized in that described intermediate gearing comprises pedestal (9), driving wheel (11), follower (10) and by the internal gear with axis (13) of bearing fixing on pedestal, its driving wheel (11) is common belt wheel, be fixed on internal gear (13) axis, follower (10) is for being provided with the belt wheel of external tooth, by the end of bearing fixing at " Z " font bent axle (12), be meshed with the internal tooth of internal gear (13), on pedestal (9), its bearing axis overlaps with the bearing axis of fixed annulus (13) axis the other end of " Z " font bent axle (12) by bearing fixing.

5, automatic stepless speed-changing device according to claim 4 is characterized in that described axis and internal gear with internal gear (13) of axis can be one, or axis and internal gear are assembled into.