CN102537258A

CN102537258A - Overhead gear shift system

Info

Publication number: CN102537258A
Application number: CN2010105776720A
Authority: CN
Inventors: 申念
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-07
Filing date: 2010-12-07
Publication date: 2012-07-04

Abstract

The invention discloses an overhead gear shift system. A first-gear driving chain wheel and a second-gear driving gear are fixedly sleeved on a driving shaft; a first-gear driven bidirectional-unidirectional device is fixedly sleeved on a driven shaft and is connected with the first-gear driving chain wheel by using a chain; when the driving shaft anticlockwise rotates, the first-gear driving chain wheel drives the first-gear driven bidirectional-unidirectional device to anticlockwise rotate and the first-gear driven bidirectional-unidirectional device drives the driven shaft to anticlockwise rotate; a second-gear driven bidirectional-unidirectional device is sleeved on the driven shaft; the second-gear driving gear is meshed with a second-gear driven gear in the second-gear driven bidirectional-unidirectional device; and when the driving shaft clockwise rotates, the second-gear driving gear drives the second-gear driven bidirectional-unidirectional device to anticlockwise rotate and the second-gear driven bidirectional-unidirectional device drives the driven shaft to anticlockwise rotate. The overhead gear shift system disclosed by the invention is novel in structure; and the gear shift function can be reliably achieved through a unidirectional device, the bidirectional-unidirectional devices and a ratchet mechanism.

Description

A kind of gear changing system that surmounts

Technical field

The present invention relates to a kind of engine accessory, specifically, relate in particular to a kind of a kind of gear changing system that surmounts that can realize becoming retaining.

Background technique

In the existing technology, various automobiles, motorcycle, electric bicycle speed changer are of a great variety, but ten thousand become from wherein, and speed changer mainly comprises manual transmission, automatic catch speed changer and stepless speed variator.Manual transmission leans on the driver manually to realize speed change; Experience to driver requires very high; The height of driver level directly influences the safety of driving and the working life of vehicle, and corresponding unfamiliar driver, changes when unexpected in the speed of a motor vehicle; Motor is under the unsteady state operating mode turns round, occur off-gear, problem such as flame-out easily; The velocity ratio rotation and the gearshift of automatic catch speed changer are carried out automatically, and the conversion of each gear of mechanical transmission realizes that by the executive component that the signaling system of the reflection engine load and the speed of a motor vehicle is controlled shifting system driver only need be handled accelerator pedal with the control speed of a motor vehicle; But the automatic catch speed changer still will pass through separation and mesh two processes in gearshift, need before gearshift, cut off driving force; Therefore can obviously feel the pause and transition in rhythm or melody sense, and mechanism is complicated, repairs difficulty; Simultaneously; Because the restriction of sensor technology, slower to the velocity variations reaction, manually retaining is not sensitive; Stepless speed variator can be realized continuously changing of velocity ratio, thereby the optimum Match of the power train of obtaining and engine operating condition improves the fuel economy and the power character of car load in theory; Improve driver's handiness property and occupant's riding comfort, so it is desirable automotive drive in theory, therefore; Use more at existing pedal motorcycle; But stepless speed variator is applied on the compact cars such as motorcycle and all uses belt transmission basically, and bearing torque is limited; The motor phenomenon that throws switch directly influences power character, Economy and the Security of car when needs torsion is big.

Summary of the invention

Technical problem to be solved by this invention is a kind of gear changing system that surmounts of a kind of novelty simple in structure being provided, can reliably realizing becoming retaining.

Technological scheme of the present invention is following: a kind of gear changing system that surmounts of design; Its main points are: comprise driving shaft and driven shaft; On said driving shaft, be installed with a retaining drive sprocket and two retaining driving gears; On said driven shaft, be installed with the driven single-direction and dual-direction device of a retaining, the driven single-direction and dual-direction device of this retaining is connected with a said retaining drive sprocket, when said driving shaft rotates counterclockwise; A said retaining drive sprocket drives the driven single-direction and dual-direction device of a said retaining and rotates counterclockwise, and the driven single-direction and dual-direction device of a said retaining drives said driven shaft and rotates counterclockwise; On said driven shaft, be set with the driven one-way element of two retainings; Two retaining driven gear engagements in said two retaining driving gears and the driven one-way element of said two retainings; When said driving shaft clockwise rotates; Said two retaining driving gears drive the driven one-way element of said two retainings and rotate counterclockwise, and the driven one-way element of said two retainings drives said driven shaft and rotates counterclockwise.

The present invention be directed to the unreliable deficiency that waits of existing gearshift gearshift and creatively design, adopt above structure, when driving shaft rotates counterclockwise; Under the effect of driving shaft; Be solidly set on one on this driving shaft retaining drive sprocket and two retaining driving gears also rotate counterclockwise together, because the retaining driven sprocket in the driven single-direction and dual-direction device of a retaining is that chain is connected with a said retaining drive sprocket, therefore driven single-direction and dual-direction device rotation of a retaining and drive driven shaft rotate counterclockwise; Thereby make driven shaft obtain a retaining speed; At this moment, the gear rotational speed of the driven one-way element of two retainings surmounts disengaged condition less than one grade of driven single-direction and dual-direction device so the driven one-way element of two retainings is in; When obtaining two retaining speed; Only need the cam ratchet in the said ratchet mechanism be separated with said spline housing ratchet, the driven single-direction and dual-direction device of a said retaining is in idling conditions, and also can realize reverse gear.

As of the present invention one preferred: the driven single-direction and dual-direction device of a said retaining includes the retaining driven sprocket with a said retaining drive sprocket engagement; In this retaining driven chain core wheel portion one retaining inverted cam is installed; A said retaining inverted cam kink is on said driven shaft; Between this a retaining inverted cam and a retaining driven sprocket inwall, the driven floating bushing of a retaining is installed; On the excircle of a said retaining inverted cam, be provided with one group of one retaining inverted cam curved surface; A said retaining inverted cam curved surface is the smooth curved surface with lift characteristics; And all along being distributed in counterclockwise on the said retaining inverted cam excircle, the driven floating bushing of a said retaining is provided with and the corresponding driven roller installation gap of a retaining of a said retaining inverted cam curved surface each retaining inverted cam curved surface, in the driven roller installation gap of a said retaining, the driven roller of a retaining is installed all.

On a said retaining inverted cam end face, be provided with the cam ratchet, on the said driven shaft in this cam ratchet outside, be installed with ratchet mechanism through spline, cam ratchet in the said ratchet mechanism and the clamping of said spline housing ratchet.Adopt above structure; Under the effect of a retaining lining spring; A said driven floating bushing of retaining and a retaining inverted cam reverse rotation; Thereby make the driven floating bushing of a retaining keep off the lift direction that driven roller presses to a retaining inverted cam curved surface, make the inwall of a retaining inverted cam, a driven roller of retaining and a retaining driven sprocket clamp state in aggregates one; When transmission of power is kept off driven sprocket to one and make a retaining driven sprocket rotation; Under the effect of one of which retaining inverted cam curved surface; The driven roller of one retaining is expanded outwardly, make the driven roller of a retaining be close to a retaining driven sprocket inwall clamping and make a retaining driven sprocket rotary work.Function based on above structure; When needs one retaining inverted cam, the driven roller of a retaining, when a retaining driven sprocket is given driven shaft with transmission of power; Only need said ratchet mechanism is moved to a retaining inverted cam direction; Make the transmission that cam ratchet and the clamping of said spline housing ratchet in the said ratchet mechanism can realize power; When not needing the two-way separation function of the driven single-direction and dual-direction device of a retaining; Under the situation of cam ratchet in said ratchet mechanism and the clamping of said spline housing ratchet, as long as the direction of rotating is the Cheng Fangxiang that falls that the driven roller of a retaining in the driven floating bushing breach of a retaining is pressed to a retaining inverted cam curved surface, a retaining inverted cam, a driven roller of retaining and a retaining driven sprocket are in the unidirectional separation function that separated state can realize the driven single-direction and dual-direction device of a retaining.

Another is preferred as of the present invention: between this a retaining driven sprocket and a retaining main chain sprocket wheel, have chain to connect, a said retaining drive sprocket drives a retaining driven sprocket and rotates in the same way.

The invention has the beneficial effects as follows: the present invention's novelty simple in structure, can realize the function of shifting gears reliably through one-way element and single-direction and dual-direction device; It has simple in structure, volume is little, be easy to safeguard, advantage that cost is low.

Description of drawings

Fig. 1 is a structural representation of the present invention; Fig. 2 is the A-A sectional view among Fig. 1; Fig. 3 is the B-B sectional view among Fig. 1; Fig. 4 is provided with the structural representation of cam ratchet 12 1 sides for two retaining inverted cams 9 among the present invention; Fig. 5 is provided with the structural representation of ratchet 13 1 sides for spline housing 14 among the present invention;

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is described further: what need explanation a bit is that the present invention all is to be that the direction that driven shaft 6 is rotated counterclockwise is the direction that garage advances with left direction; And the direction that to be driven shaft 6 clockwise rotate of direction to the right is the astern direction of car, but not as restriction.

Like Fig. 1, Fig. 2 and a kind of gear changing system that surmounts shown in Figure 3; Comprise driving shaft 1 and driven shaft 6; On said driving shaft 1, be installed with a retaining drive sprocket 3 and two retaining driving gears 2; On said driven shaft 6, be installed with the driven single-direction and dual-direction device of a retaining, initiatively connect at a retaining driven sprocket 8 and a retaining of the driven single-direction and dual-direction device of a said retaining and take turns 3 and be connected, when said driving shaft 1 rotates counterclockwise; A said retaining initiatively connects wheel 3 and drives the driven single-direction and dual-direction device of a said retaining and rotate counterclockwise, and the driven single-direction and dual-direction device of a said retaining drives said driven shaft 6 and rotates counterclockwise; On said driven shaft 6, be set with said two retaining driving gears 2 and said two and keep off two retaining driven gears, 7 engagements in the driven one-way element; When said driving shaft 1 clockwise rotates; Said two retaining driving gears 2 drive the driven one-way element of said two retainings and rotate counterclockwise, and the driven one-way element of said two retainings drives said driven shaft 6 and rotates counterclockwise.The embodiment 1 of the driven single-direction and dual-direction device of one retaining:

Please participate in Fig. 3: the driven single-direction and dual-direction device of a said retaining includes a retaining driven sprocket 8 that is connected with a said retaining drive sprocket 3; Retaining driven sprocket 8 left parts through Bearing Installation on said driven shaft 6; These retaining driven sprocket 8 right part heart portions are equipped with a retaining inverted cam 9; A said retaining inverted cam 9 kinks are on said driven shaft 6; Between this retaining inverted cam 9 and a retaining driven sprocket 8 inwalls, the driven floating bushing 10 of a retaining is installed; On the excircle of a said retaining inverted cam 9, be provided with one group of one retaining inverted cam curved surface 9a; This said retaining inverted cam curved surface 9a is evenly distributed on the excircle of a said retaining inverted cam 9, and a said retaining inverted cam curved surface 9a is the smooth curved surface with lift characteristics, and each retaining inverted cam curved surface 9a all is distributed on a said retaining inverted cam 9 excircles counterclockwise; The driven floating bushing 10 of a said retaining is provided with and the driven roller installation gap 10a of a said corresponding retaining of retaining inverted cam curved surface 9a; In the driven roller installation gap 10a of a said retaining, the driven roller 11 of a retaining is installed all, the driven floating bushing 10 of a said retaining keeps off the lift direction that driven roller 11 presses to a said retaining inverted cam curved surface 9a with said one under the effect of lining spring 19

On a said retaining inverted cam 9 right sides, be provided with cam ratchet 12; On the said driven shaft 6 in these cam ratchet 12 outsides, be installed with ratchet mechanism through spline; Cam ratchet 12 in the said ratchet mechanism and said spline housing ratchet 13 clampings, said ratchet mechanism is made up of spline housing 14, spline housing ratchet 13, stage clip 15, setting sleeve 16 and electromagnetic coil 17, is provided with spline housing ratchet 13 at the left end of said spline housing 14; Said spline housing 14 left parts through spline package on said driven shaft 6; Said stage clip of suit 15 and setting sleeve 16 on the said driven shaft 6 of these spline housing 14 right parts, and said setting sleeve 16 is solidly set on the said driven shaft 6, said stage clip 15 1 ends are against on the said spline housing 14; The other end is against on the said setting sleeve 16; At the said electromagnetic coil 17 of said spline housing 14 right part overcoats, when said electromagnetic coil 17 cuts off the power supply, said cam ratchet 12 and said spline housing ratchet 13 clampings; When said electromagnetic coil 17 was switched on, said cam ratchet 12 separated with said spline housing ratchet 13.

The above is merely preferred embodiment of the present invention; Not in order to restriction the present invention; Can adopt existing one-way element like the driven single-direction and dual-direction device of the retaining of one among the present invention, as long as can realize one-way function, be not restriction with the mounting point; Therefore all any modifications of within spirit of the present invention and principle, being done, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.

Claims

1. one kind surmounts gear changing system; It is characterized in that: comprise driving shaft (1) and driven shaft (6); On said driving shaft (1), be installed with a retaining drive sprocket (3) and two retaining driving gears (2); On said driven shaft (6), be installed with the driven single-direction and dual-direction device of a retaining, driven single-direction and dual-direction device of this retaining and said keeps off drive sprocket (3) and is connected, when said driving shaft (1) when rotating counterclockwise; A said retaining drive sprocket (3) drives the driven single-direction and dual-direction device of a said retaining and rotates counterclockwise, and the driven single-direction and dual-direction device of a said retaining drives said driven shaft (6) and rotates counterclockwise; On said driven shaft (6), be set with the driven one-way element of two retainings; Said two retaining driving gears (2) and said two keep off two retaining driven gears (7) engagements in the driven one-way element; When said driving shaft (1) when clockwise rotating; Said two retaining driving gears (2) drive the driven one-way element of said two retainings and rotate counterclockwise, and the driven one-way element of said two retainings drives said driven shaft (6) and rotates counterclockwise.

2. a kind of gear changing system that surmounts according to claim 1; It is characterized in that: the driven single-direction and dual-direction device of a said retaining includes the retaining driven sprocket (8) with said retaining drive sprocket (a 3) engagement; In this retaining driven sprocket (8) heart portion one retaining inverted cam (9) is installed; Said retaining inverted cam (a 9) kink is on said driven shaft (6); Between this a retaining inverted cam (9) and retaining driven sprocket (a 8) inwall, a retaining driven floating bushing (10) is installed; On the excircle of a said retaining inverted cam (9), be provided with one group of one retaining inverted cam curved surface (9a), a said retaining inverted cam curved surface (9a) is the smooth curved surface with lift characteristics, and each two retaining inverted cam curved surface (9a) is all along being distributed in counterclockwise on said retaining inverted cam (9) excircle; A said driven floating bushing of retaining (10) is provided with a retaining driven roller installation gap (10a) corresponding with a said retaining inverted cam curved surface (9a), installs to lack at the driven roller of a said retaining a retaining driven roller (11) all is installed in (10a); Between a said retaining driven floating bushing (10) and the retaining inverted cam (9) lining spring (19) is installed, this lining spring (19) can make a said driven floating bushing of retaining (10) a said driven roller of retaining (11) pressed to the lift direction of a said retaining inverted cam curved surface (9a); On said retaining inverted cam (a 9) end face, be provided with cam ratchet (12), go up at the said driven shaft (6) in this cam ratchet (12) outside and be installed with ratchet mechanism through spline, cam ratchet (12) in the said ratchet mechanism and said spline housing ratchet (13) clamping.

3. a kind of gear changing system that surmounts according to claim 2; It is characterized in that: said ratchet mechanism is made up of spline housing (14), spline housing ratchet (13), stage clip (15), setting sleeve (16) and electromagnetic coil (17); Left end at said spline housing (14) is provided with ratchet (13); Said spline housing (14) left part through spline package on said driven shaft (6); Go up said stage clip of suit (15) and setting sleeve (16) at the said driven shaft (6) of this spline housing (14) right part, and said setting sleeve (16) is solidly set on the said driven shaft (6), said stage clip (15) one ends are against on the said spline housing (14); The other end is against on the said setting sleeve (16), at the said electromagnetic coil of said spline housing (14) right part overcoat (17).

A said retaining driven sprocket (8) is connected with chain (18) with a said retaining drive sprocket (3), and the said retaining driven sprocket (8) of said retaining drive sprocket (a 3) driving counterclockwise rotates.

4. a kind of gear changing system according to claim 1 is characterized in that: between a retaining driven sprocket (8) and the retaining drive sprocket (3) chain (18) is arranged, a said retaining drive sprocket (3) drives a retaining driven sprocket (8) and rotates in the same way.