CN201296353Y

CN201296353Y - Automatic clutch shifting mechanism arranged at the rear of motorcycle

Info

Publication number: CN201296353Y
Application number: CNU2008201006255U
Authority: CN
Inventors: 刘国强; 陈强; 温金灿
Original assignee: CHONGQING TONGSHENG MECHANICAL INDUSTRY Co Ltd
Current assignee: CHONGQING TONGSHENG MECHANICAL INDUSTRY Co Ltd
Priority date: 2008-11-19
Filing date: 2008-11-19
Publication date: 2009-08-26
Anticipated expiration: 2018-11-19

Abstract

The utility model discloses an automatic clutch shifting mechanism, which is arranged at the rear of a motorcycle and comprises a shifting shaft component, a shifting rocker arm component, a fork and a shifting shaft block component. The position, through which a positioning pin passes,of the fork, is provided with a hollow groove; the left edge and the right edge of the hollow groove are inclined outward; the central part of the upper part of the hollow groove is provided with a return bump which is upward and is provided with a left bayonet and a right bayonet; the shifting shaft is provided with a pressure-variable torsional elastic mechanism; and the front end of the pressure-variable torsional elastic mechanism is clamped in the left bayonet and the right bayonet of the return bump of the fork; the pressure-variable torsional elastic mechanism is used for forced separating shifting of a clutch and leading a clutch shifting mechanism to return the original position after shifting. The pressure-variable torsional elastic mechanism comprises an outer shell, a torsional spring and a pressure spring. The automatic clutch shifting mechanism solves the defects that the single stage automatic clutch can carry out shifting as long as the speed of the engine is reduced by oil return and the shifting is inconvenient when upsloping and downsloping, the structure of the double stage automatic clutch is complicated, the noise is large and the cost is high, simultaneously simplifies the structure, reduces the cost, also can reduces the operation fatigue and improves the use safety.

Description

A kind of gear shift mechanism of motorcycle with automatic clutch at rear

Technical field

The utility model relates to a kind of Motorcycle Automatic Clutch, particularly a kind of gear shift mechanism of motorcycle with automatic clutch at rear.

Background technology

This gear shift mechanism of motorcycle with automatic clutch at rear is that the patent No. is: the follow-up invention of ZL200610054225.0, this invention relates to a kind of engine clutch for motorcycle, particularly a kind of tailing forced separation one-stage auto clutch of motorcycle.The branch that manual clutch and self-acting clutch are arranged in clutch of motorcycle, manual clutch is normal convolution power-transfer clutch, complicated operation, use inconvenience, but can realize forcing gearshift, and the twin-stage self-acting clutch in the self-acting clutch also can be realized forcing to shift gears, and its deficiency is that structure is complicated, the bad control of running noise, noise is big, the cost height.

Summary of the invention

The purpose of this utility model is exactly at the deficiencies in the prior art, provides a kind of and simplifies the structure, and when having reduced cost, can reduce operation fatigue again, improves the gear shift mechanism of motorcycle with automatic clutch at rear of safety in utilization.

For achieving the above object, the utility model adopts following technical scheme:

A kind of gear shift mechanism of motorcycle with automatic clutch at rear, comprise gearshift Shaft assembly, gearshift rocker arm assembly, shift fork, gearshift axle fixture block assembly, the locating dowel pin of captive joint passes the shift fork body on the gearshift axle fixture block assembly, it is characterized in that: the position that described shift fork locating dowel pin passes offers dead slot, the limit, the left and right sides of dead slot is outward-dipping, being used to shift gears Shaft assembly can rotating certain angle, and the central authorities on dead slot top are provided with and are upturned, and have the return projection of left and right sides bayonet socket; On the gearshift axle, be provided with to press and become elasticity of torsion mechanism, press change elasticity of torsion mechanism to place above the shift fork, and with the locating dowel pin location on the gearshift axle fixture block assembly, press the front end that becomes elasticity of torsion mechanism to be stuck in the left and right sides bayonet socket of shift fork return projection, press change elasticity of torsion mechanism to be used for making clutch gear-shift mechanism be returned to the initial position after power-transfer clutch forces to separate gearshift and gearshift.

Preferably, the another kind of described pressure of the utility model becomes elasticity of torsion mechanism and comprises overcoat, torsion spring, stage clip, and overcoat is enclosed within on the gearshift axle, and places above the shift fork, and the top of overcoat is equipped with circlip for shaft by the draw-in groove on the gearshift axle; Stage clip is located in the overcoat, be enclosed within on the gearshift axle, torsion spring set is in the outside of overcoat, the last pin of torsion spring bends from top to bottom, make pin and following pin be in same plane, last pin and following pin lean against the right and left of locating dowel pin on the gearshift axle fixture block assembly respectively, and the front end of last pin and following pin is stuck in the left and right sides bayonet socket of shift fork return projection.The gear shifting rocking arm assembly removably positive connection the gearshift Shaft assembly on, when shifting gears Shaft assembly under the effect of change pedal power, when making cw or anti-clockwise and rotatablely moving, shift shaft drives the swing of gear shifting rocking arm assembly, makes power-transfer clutch be in released state by gear shift mechanism of motorcycle with automatic clutch at rear; Have on the shift fork than the big slightly manhole of gearshift shaft diameter size and the dead slot of each outward-dipping certain number of degrees of limit, the left and right sides, before engine gear, provide necessary advance angle for the pressure of power-transfer clutch separates.The center upper portion of groove has the return projection with bayonet that is upturned.The gearshift axle passes the manhole of shift fork, shift fork is installed on the gearshift axle, and can and swings up and down around gearshift axle left-right rotation.During gearshift, the gearshift Shaft assembly can turn over certain angle earlier, drives the gear shifting rocking arm assembly and swings, and makes power-transfer clutch be in released state by gear shift mechanism of motorcycle with automatic clutch at rear.Only the stupefied limit of the locating dowel pin contact dead slot on the gearshift Shaft assembly drives when shift fork rotates and could realize gear shift.Bore periphery is equipped with to press and becomes elastic body---stage clip on the shift fork, and the assurance shift fork resets in gearshift upwards can recover drive range downwards after the swing immediately.Overcoat covers on to press and becomes elastic body---on the stage clip, so that elasticity of torsion body to be provided---the installation site of torsion spring, elasticity of torsion body---torsion spring is with the locating dowel pin location on the gearshift Shaft assembly, the outer end is installed in the bayonet socket of shift fork return projection, make shift fork behind the left-right rotation certain angle, can be at elasticity of torsion body---be returned to the initial position under the effect of the elasticity of torsion power of torsion spring, so that realize smooth gear shift next time.

Further preferred, the top of described overcoat is provided with the outer; The outer prevents that torsion spring breaks away from the overcoat body.Offer gap on the overcoat body.Gap is convenient to assemble stage clip.

Preferably, shift fork locating dowel pin described in the utility model pass the position offer the outward-dipping angle in limit, the dead slot left and right sides be 6～16 the degree.The angle of outward-dipping 10 degree in limit, the left and right sides, 5 degree angles of inclination can be provided for each limit, stupefied limit about dead slot, can provide the gearshift Shaft assembly to turn over enough angles, make power-transfer clutch be in released state, simultaneously, make shift fork behind the left-right rotation certain angle, can be at elasticity of torsion body---be returned to the initial position rapidly under the effect of the elasticity of torsion power of torsion spring.

The beneficial effect of a kind of gear shift mechanism of motorcycle with automatic clutch at rear of the utility model is, solved that rearmounted one-stage auto clutch has only oil return that engine speed is slowed down could to shift gears and the ramp on the shortcoming and the twin-stage self-acting clutch complex structure of inconvenience gearshift, big and the high deficiency of cost of noise, it with rear-mounted self-acting clutch with force separation device to combine to have accomplished can smooth starting, arbitrary speed is forced gearshift in the running again, has cancelled clutch control handgrip, cable and corresponding steering unit that manually normal convolution power-transfer clutch must use.Simplifying the structure, when having reduced cost, can reduce operation fatigue again, improving safety in utilization.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the right elevation of Fig. 1;

Fig. 3 is the structural representation of the utility model shift fork 3;

Fig. 4 is an A-A sectional structure scheme drawing among Fig. 3;

Fig. 5 is the birds-eye view of Fig. 3;

Fig. 6 is the structural representation of the utility model overcoat 52;

Fig. 7 is the right elevation of Fig. 6;

Fig. 8 be in the utility model torsion spring 53 from running condition structural representation;

Fig. 9 is the structural representation of torsion spring 53 free states in the utility model;

Figure 10 is the birds-eye view of Fig. 9.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described, as Fig. 1, Fig. 2, shown in Figure 3:

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, a kind of gear shift mechanism of motorcycle with automatic clutch at rear, comprise gearshift Shaft assembly 1, gearshift rocker arm assembly 2, shift fork 3, gearshift axle fixture block assembly 4, the locating dowel pin 41 of captive joint passes shift fork 3 bodies on the gearshift axle fixture block assembly 4, it is characterized in that: the position that described shift fork 3 locating dowel pins 41 pass offers dead slot 31, the limit, the left and right sides of dead slot 31 is outward-dipping, being used to shift gears Shaft assembly can rotating certain angle, the central authorities on dead slot 31 tops are provided with and are upturned, and have the return projection 32 of left and right sides bayonet socket 321; On gearshift axle 11, be provided with to press and become elasticity of torsion mechanism 5, press change elasticity of torsion mechanism 5 to place above the shift fork 3, and with locating dowel pin 41 location on the gearshift axle fixture block assembly 4, press the front end that becomes elasticity of torsion mechanism 5 to be stuck in the left and right sides bayonet socket 321 of shift fork return projection 32, press change elasticity of torsion mechanism 5 to be used for making clutch gear-shift mechanism be returned to the initial position after power-transfer clutch forces to separate gearshift and gearshift.

Referring to Fig. 1, Fig. 2, Fig. 8, Fig. 9, Figure 10, described pressure becomes elasticity of torsion mechanism 5 and comprises overcoat 52, torsion spring 53, stage clip 54, overcoat 52 is enclosed within on the gearshift axle 11, and places above the shift fork 3, and the top of overcoat 52 is equipped with circlip for shaft 6 by the draw-in groove on the gearshift axle 11; Stage clip 54 is located in the overcoat 52, be enclosed within on the gearshift axle 11, torsion spring 53 is enclosed within the outside of overcoat 52, the last pin 531 of torsion spring 51 bends from top to bottom, make pin 531 and following pin 532 be in same plane, last pin 531 and following pin 532 lean against the right and left of locating dowel pin 41 on the gearshift axle fixture block assembly 4 respectively, and the front end of last pin 531 and following pin 532 is stuck in the left and right sides bayonet socket 321 of shift fork return projection 32.

Referring to Fig. 6, Fig. 7, the top of described overcoat 52 is provided with outer 521; Offer gap 522 on overcoat 52 bodies

Referring to Fig. 3, described shift fork 3 locating dowel pins 41 pass the position offer the outward-dipping angle in limit, dead slot 31 left and right sides be 6～16 the degree.

Claims

1, a kind of gear shift mechanism of motorcycle with automatic clutch at rear, comprise gearshift Shaft assembly (1), gearshift rocker arm assembly (2), shift fork (3), gearshift axle fixture block assembly (4), the locating dowel pin (41) that gearshift axle fixture block assembly (4) is gone up captive joint passes shift fork (3) body, it is characterized in that: the position that described shift fork (3) locating dowel pin (41) passes offers dead slot (31), the limit, the left and right sides of dead slot (31) is outward-dipping, being used to shift gears Shaft assembly can rotating certain angle, the central authorities on dead slot (31) top are provided with and are upturned, and have the return projection (32) of left and right sides bayonet socket (321); On gearshift axle (11), be provided with to press and become elasticity of torsion mechanism (5), press change elasticity of torsion mechanism (5) to place above the shift fork (3), and with the location of the locating dowel pin (41) on the gearshift axle fixture block assembly (4), press the front end that becomes elasticity of torsion mechanism (5) to be stuck in the left and right sides bayonet socket (321) of shift fork return projection (32), press change elasticity of torsion mechanism (5) to be used for making clutch gear-shift mechanism be returned to the initial position after power-transfer clutch forces to separate gearshift and gearshift.

2, gear shift mechanism of motorcycle with automatic clutch at rear according to claim 1, it is characterized in that: described pressure becomes elasticity of torsion mechanism (5) and comprises overcoat (52), torsion spring (53), stage clip (54), overcoat (52) is enclosed within on the gearshift axle (11), and place above the shift fork (3), the top of overcoat (52) is equipped with circlip for shaft (6) by the draw-in groove on the gearshift axle (11); Stage clip (54) is located in the overcoat (52), be enclosed within on the gearshift axle (11), torsion spring (53) is enclosed within the outside of overcoat (52), the last pin (531) of torsion spring (51) bends from top to bottom, make pin (531) and following pin (532) be in same plane, last pin (531) and following pin (532) lean against the right and left that gearshift axle fixture block assembly (4) is gone up locating dowel pin (41) respectively, and the front end of last pin (531) and following pin (532) is stuck in the left and right sides bayonet socket (321) of shift fork return projection (32).

3, gear shift mechanism of motorcycle with automatic clutch at rear according to claim 2 is characterized in that: the top of described overcoat (52) is provided with outer (521); Offer gap (522) on overcoat (52) body.

4, gear shift mechanism of motorcycle with automatic clutch at rear according to claim 1 is characterized in that: described shift fork (3) locating dowel pin (41) pass the position offer the outward-dipping angle in dead slot (31) limit, the left and right sides be 6～16 the degree.