CN2256961Y - Automatic clutch - Google Patents

Abstract

The utility model relates to a cycle engine automatic clutch, wherein, a bearing sleeve is fixedly connected with a driven disk; the periphery of the bearing sleeve is provided with gear teeth; the support disk of the centrifugal block is fixedly connected with the output shaft of the engine; the output shaft is arranged through passing through the lining element of the bearing; the support disk is embedded into the internal and peripheral groove of the centrifugal block, and pins on the centrifugal block can be embedded into the strip-shaped gap in the support disk, and the inner part of the side surface groove of the centrifugal block is provided with a sheet spring which can restrain the centrifugal block from externally engaging and connecting and a screw spring.

Description

Automatic clutch

The utility model relates to the engaging and disengaging gear of motor, be particularly related to the automatic centrifugal clutch of bicycle power-assisted, refer in particular to a kind of clutch of automatic combination when engine speed arrives previously selected rotating speed (for example optimal operating condition rotating speed) with motor.

The engaging and disengaging gear of existing bicycle or motor vehicular engine, all be to adopt manual clutch, just after engine start, manually the manual operation clutch makes its combination, this engaging and disengaging gear makes its combination in the time of can not selecting the motor optimal operating condition, this just causes under the non-optimum condition of motor and starts working, thereby causes bigger oil consumption or can not fully advantageously bring into play the performance of motor.Certainly, also can adopt centrifugal clutch, but this clutch all is that centrifugal is hingedly mounted on the centrifugal supporting disk, rely on centrifugal swing to make it to combine with driven disc, because the setting that rotation is centrifugal, the balance when centrifugal supporting disk rotates is relatively poor, and particularly extremely difficult adjustment of the tensioning degree of each Returnning spring of centrifugal becomes equally, therefore just cause each bonding state of centrifugal inhomogeneous, influence the running stability of clutch.

Therefore, the purpose of this utility model is the automatic clutch that proposes a kind of bicycle engine, and guaranteeing combination automatically when motor arrives selected optimum condition rotating speed, and the clutch dynamic balancing is better, in conjunction with steady.

For achieving the above object, the automatic clutch of the bicycle engine that the utility model proposes comprises driven disc, centrifugal supporting base, centrifugal and Returnning spring, it is characterized in that, centrifugal supporting disk and engine output shaft are affixed, described centrifugal supporting disk is rounded, has the equal angles vertical bar shaped breach that radially extends to this supporting disk excircle at interval on it; Some centrifugal, this centrifugal curved bulk, has the groove that the thickness of section width and centrifugal supporting disk adapts on the inner circumferential surface, be connected with friction plate on its outer circumferential face, the circular groove that has on the described centrifugal side has the pin-and-hole of centrifugal of axial perforation on the groove location on the described inner peripheral surface on described centrifugal; Some pins, the middle part of this pin has flat portion, and the width of the vertical bar shaped breach on the thickness of flat portion and the described supporting disk adapts, and the diameter of the described pin-and-hole on the diameter at pin two ends and described centrifugal adapts; Some arc-like sheet springs inwardly have respectively outside local kink on this arc-like sheet spring; Helical spring, these helical spring two ends have the latch closure of snapping mutually; Described driven disc is the tazza shape, and its center has center hole, and the bearing housing that the inboard has the oil-impregnated bearing backing member is fixed in this central hole, and described bearing housing periphery has the gear teeth with driving gear engagement usefulness;

Described pin is contained in respectively in the centrifugal pin-and-hole, the periphery of centrifugal supporting disk embeds in the groove on each centrifugal inner peripheral surface, flat of the center of pin then embeds respectively in the centrifugal bar v notch v on the supporting disk, the local lapping mutually of arc-like sheet spring and be positioned at the circular groove on each side of centrifugal and be close to the madial wall of this groove, bending part on the arc-like sheet spring between two centrifugal, thereby make each arc-like sheet spring round each centrifugal; Described helical spring is enclosed in the outside of each arc-like sheet spring; Pass bearing backing member on the driven disc with the affixed engine output shaft of centrifugal supporting disk, centrifugal supporting disk and on part in addition be positioned at driven disc together, have certain interval between driven disc inboard and the friction plate.

The bicycle engine automatic clutch that the utility model proposes retrains with identical sheet spring with same annular spring owing to centrifugal in the centrifugal clutch wherein, therefore under centrifugal action each centrifugal move with and be uniformity very with combining of driven disc, in addition, it is identical that each shape of centrifugal and weight also are easy to guarantee, so the operation of this clutch is in conjunction with being well-balanced.Therefore structure is very simple, and operation also is easy to.And, can determine under selected rotating speed, to make centrifugal automatic combination as long as adjust the tension force of the annular spring of centrifugal of constraint.

Embodiment to the automatic clutch of the bicycle engine that the utility model proposes is described further below in conjunction with accompanying drawing.

Fig. 1 is the overall cross-sectional schematic of the automatic clutch of the bicycle engine that the utility model proposes;

Fig. 2 is that centrifugal supporting disk assembled centrifugal, the assembling schematic representation behind pin, arc-like sheet spring, the helical spring;

Fig. 3 A is a centrifugal front elevational schematic;

Fig. 3 B is a centrifugal schematic side view;

Fig. 3 C is that the centrifugal back of the body is looked schematic representation;

Fig. 3 D shows schematic representation along cuing open of A-A among Fig. 3 C;

Fig. 3 E be among Fig. 3 C B to schematic representation;

Fig. 4 A is the front elevational schematic of centrifugal supporting disk;

Fig. 4 B is that cuing open of centrifugal supporting disk shown schematic representation

Fig. 5 A and 5B are respectively the front view and the side views of pin;

Fig. 6 A and 6B are respectively the front elevational schematic and the schematic side view of arc-like sheet spring;

Fig. 6 C shows schematic representation along cuing open of B-B among Fig. 6 A;

Fig. 7 is the helical spring schematic representation;

Fig. 8 is that cuing open of driven disc shown schematic representation, has the gear teeth on bearing housing and bearing backing member and its periphery on it;

Below in conjunction with accompanying drawing embodiment of the present utility model is illustrated.

Please refer to Fig. 1, the automatic clutch that the utility model proposes has driven disc 10 (see figure 8)s, this driven disc 10 is the tazza shape, its rear portion has 6 equally distributed draining holes 11, and its center has center hole, and bearing housing 12 is housed in this center hole, and these bearing housing 12 outsides have the gear teeth 13 with driven gear 2 engagements, bearing backing member 30 is positioned at bearing housing 12, and this bearing backing member 30 is cylindric oil-impregnated bearing backing member.Pass bearing backing member 30 with the affixed engine output shaft 1 of centrifugal supporting disk 20 and be provided with.

Please refer to Fig. 4 A and 4B, centrifugal supporting disk 20 is in the form of annular discs, has three vertical bar shaped breach 201 that radially extend to excircle that equal angles is spaced apart on it.Centrifugal 21 is three, this centrifugal 21 curved bulk (seeing Fig. 3 A-3E), has the groove 214 that the thickness of section width and centrifugal supporting disk 20 adapts on the inner circumferential surface, and be connected with friction plate 24 on its outer circumferential face, has circular groove 213 on centrifugal 21 the side, have the pin-and-hole 211 that runs through centrifugal 21 on centrifugal 21 in groove 214 scopes of living in of inner circumference, this pin 211 is near an end of centrifugal 21.Pin 25 middle parts have flat 251, and the width of the bar v notch v 201 on flat 251 thickness and the supporting disk 20 adapts (seeing Fig. 5 A, 5B), and the diameter of the pin-and-hole 211 on the diameter at pin 25 two ends and centrifugal 21 adapts.Arc spring leaf 23 (seeing Fig. 6 A-6C) has inside, outside kink 221,222 for to form with the spring steel plate punching out on it.Helical spring 23 (see figure 7)s.Two ends have the latch closure 231 of snapping mutually.

Ask for an interview Fig. 2 and Fig. 1, three pins 25 are contained in respectively in centrifugal 21 the pin-and-hole 211, the periphery of centrifugal supporting disk 20 embeds in each inner peripheral surface groove 214 of centrifugal 21, in flat the 251 bar v notch v 201 that then embeds on the centrifugal supporting disk 20 at the middle part of pin 25, the portion that bends inwards 221 of arc spring leaf 22 is circumferentially mobile to prevent it between two adjacent centrifugal 21 terminations, each arc spring leaf 22 local lappings mutually and be arranged in circular groove 213 on each side of centrifugal 21 and be close to the madial wall 215 of this groove, 222 of the outside kinks of arc spring leaf 22 can prevent axially mutual the moving of reed 22, three reeds 22 constitute circular and in side circular groove 213 round three centrifugal 21.23 of helical springs are enclosed in the outside of three reeds 22 and are positioned at groove 213 on the side.Pass the bearing backing member 30 on the driven disc 10 with centrifugal 21 affixed engine output shaft 1 and be provided with.Centrifugal supporting disk 21 and on part in addition be positioned at driven disc 10 inboards together, driven disc 10 is inboard to have certain interval with friction plate 24 outsides.

Below the operation of the automatic clutch of the bicycle engine that the utility model proposes is further described, when the rotating speed of engine start rear output shaft 1 arrives desired speed, for example 2700 rev/mins the time, perhaps during the minimum specific fuel consumption rotating speed of motor, perhaps during the maximum motor rotary speed of motor, when perhaps taking into account the selected rotating speed of oil consumption and horsepower, under centrifugal action, radially overcome the elastic force of spring for centrifugal 21 and drive driven disc 10 and bearing housing 12 rotations affixed, and then the driving gear 2 of transmission and bearing housing 12 engagements rotates with it with driven disc 10 combinations.By the transmission of power approach bicycle chainwheel is rotated.Thereby just driven bicycle and advanced.

Claims (2)

1, a kind of automatic clutch, this clutch comprises, driven disc, centrifugal supporting base, centrifugal and Returnning spring, it is characterized in that, centrifugal supporting disk and engine output shaft are affixed, described centrifugal supporting disk is rounded, has the equal angles vertical bar shaped breach that radially extends to this supporting disk excircle at interval on it; Some centrifugal, this centrifugal curved bulk, has the groove that the thickness of section width and centrifugal supporting disk adapts on the inner circumferential surface, be connected with friction plate on its outer circumferential face, the circular groove that has on the described centrifugal side has the pin-and-hole of centrifugal of axial perforation on the groove location on the described inner peripheral surface on described centrifugal; Some pins, the middle part of this pin has flat portion, and the width of the vertical bar shaped breach on the thickness of flat portion and the described supporting disk adapts, and the diameter of the described pin-and-hole on the diameter at pin two ends and described centrifugal adapts; Some arc-like sheet springs inwardly have respectively outside local kink on this arc-like sheet spring; Helical spring, these helical spring two ends have the latch closure of snapping mutually; Described driven disc is the tazza shape, and its center has center hole, and the bearing housing that the inboard has the oil-impregnated bearing backing member is fixed in this central hole, and described bearing housing periphery has the gear teeth with driving gear engagement usefulness;

Described pin is contained in respectively in the centrifugal pin-and-hole, the periphery of centrifugal supporting disk embeds in the groove on each centrifugal inner peripheral surface, flat of the center of pin then embeds respectively in the centrifugal bar v notch v on the supporting disk, the local lapping mutually of arc-like sheet spring and be positioned at the circular groove on each side of centrifugal and be close to the madial wall of this groove, bending part on the arc-like sheet spring between two centrifugal, thereby make each arc-like sheet spring round each centrifugal; Described helical spring is enclosed in the outside of each arc-like sheet spring; Pass bearing backing member on the driven disc with the affixed engine output shaft of centrifugal supporting disk, centrifugal supporting disk and on part in addition be positioned at driven disc together, have certain interval between driven disc inboard and the friction plate.

2, clutch according to claim 1 is characterized in that wherein centrifugal is three.

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