CN201071888Y

CN201071888Y - Friction wafer type automatic clutch

Info

Publication number: CN201071888Y
Application number: CNU2007201248160U
Authority: CN
Inventors: 刘珍利
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-25
Filing date: 2007-07-25
Publication date: 2008-06-11
Anticipated expiration: 2017-07-25

Abstract

The utility model discloses a friction disk type automatic clutch. The driving disc of the clutch is respectively provided with eight teeth and eight grooves used for arranging centrifugal blocks in the way of equally dividing the circumference, teeth and the grooves are alternately arranged at intervals along the circumference of the driving disc, eight centrifugal blocks can make the centrifugal movement and is arranged in the grooves for arranging the centrifugal blocks to be contacted with a pushing plate, an outer cover is a steel plate outer cover on which eight grooves is drawn, punched and molded, the eight grooves are respectively on the inner wall of the circumference in the way of equally dividing the circumference, eight teeth on the driving disc are respectively and correspondingly matched in the eight grooves of the outer cover, and a driving piece combined by the pushing plate, a baffle plate and a friction pair is matched with an outer cover spline. The utility model is the friction disk type automatic clutch which not only can increase the torque transferred by the clutch, and also can prevent the outer cover of the clutch from broken off, to cause the small volume clutch of a small exhaust motorcycle engine to be applied on a relatively large exhaust motorcycle engine, and thus the production cost of the motorcycle can be reduced.

Description

The friction disk type automatic clutch

Technical field

The utility model relates to a kind of automatic clutch, particularly a kind of friction disk type automatic clutch of motorcycle engine.

Background technique

The former discharge capacity that is applicable to is the friction disk type automatic clutch of 70 milliliters handy type motorcycle engine, centrifugal of this automatic clutch produces centrifugal force during with the bent axle high speed rotating at driving disc, form displacement movement and provide positive pressure for the clutch friction pair, make the master and slave moving plate of friction pair be close to transferring power, it has the little advantage of volume.In recent years, demand along with market, this clutch is applied on the motorcycle engine that discharge capacity is a discharge capacity more than 90,100,110 milliliters, but because this clutch only is provided with four centrifugal, when clutch is worked, centrifugal applies positive pressure by promoting push pedal to friction pair, because the plastic deformation of push pedal, cause that push pedal and contacting of friction pair are actual has only centrifugal pairing 4 contacts, the minimizing of area of contact, skid easily, bring the loss of machine of torque of clutch; Simultaneously, because centrifugal few, the light weight of quantity, it is also just less to be applied to the moment of torsion that obtains on the friction pair, when causing this clutch to be applied on the motorcycle engine that discharge capacity is a discharge capacity more than 90,100,110 milliliters, transmission of power is poor, the situation of high load with small power occurs, have a strong impact on its use on the motorcycle engine of discharge capacity more than 90,100,110 milliliters again.And, because the outer cover of this clutch is to adopt aluminum alloy material to make, the existing weakness of the mechanical property of aluminum alloy, limited again and on this clutch, increased centrifugal possibility, because of increasing compression point in case increase centrifugal, impel moment of torsion to increase, can cause the fracture of aluminum alloy outer cover after moment of torsion increases again, influence the working life of clutch.And the price of aluminum alloy is higher, is unfavorable for reducing product cost.

Summary of the invention

The purpose of this utility model is the problem at the existence of prior art, a kind of moment of torsion that can increase clutch transmits is provided, can prevent the friction disk type automatic clutch of clutch housing fracture again, make the small volume clutch of small-displacement engine of motorcycle, can be applied on the motorcycle engine of relatively large discharge capacity, reduce the cost of production of motorcycle.

The technical solution of the utility model is achieved in that the driving disc of clutch is provided with the splined hole that is connected with bent axle, the outer cover of clutch is connected with driving disc by screw, between outer cover and the driven disc combination friction pair combination is set, the friction pair built-up shaft is adjacent to an end and push pedal, the other end and baffle plate are adjacent, the driven disc combination cooperates rotatably with driving disc, be respectively arranged with 8 teeth and 8 described driving disc circumference in equal parts and be used to install centrifugal groove, tooth and groove are provided with at interval along the driving disc circle alternate, can make centrifugal motion ground for 8 centrifugal is installed in the groove that is used for installing centrifugal respectively and contacts with push pedal, described outer cover has the steel plate outer cover of 8 grooves for the pull and stretch impact briquetting, the outer cover circumferential inner wall is located on 8 groove circumference in equal parts ground respectively, 8 teeth on the driving disc are distinguished corresponding matching in 8 grooves of outer cover, push pedal, the rotating plate of baffle plate and friction pair combination all with the outer cover spline fitted.

Owing to adopted such scheme, described driving disc circumference in equal parts be respectively arranged with 8 teeth and 8 and be used to install centrifugal groove, tooth and groove are provided with at interval along the driving disc circle alternate, can make centrifugal motion ground for 8 centrifugal is installed in the groove that is used for installing centrifugal respectively and contacts with push pedal, just had 8 centrifugal like this on the friction disk type automatic clutch to the push pedal applied thrust, the area of contact of push pedal and friction pair is increased, and it is more even, reduce the plastic deformation of push pedal, when push pedal is promoted by centrifugal, can apply strong pressure to friction pair, the rotating plate and the driven plate that guarantee friction pair are close to, increase the moment of torsion of clutch transmits thus, eliminate loss of machine of torque.Be used to install centrifugal groove owing to be respectively arranged with 8 teeth and 8 the driving disc circumference in equal parts, and install 8 centrifugal, the outer cover of clutch just need be provided with 8 with driving disc on 8 teeth groove of corresponding matching respectively, 8 teeth on the driving disc can be inserted respectively in 8 grooves that are engaged on the outer cover, both having formed driving disc cooperates with the circumferential location of outer cover, again can be spacing and support to the position of push pedal spline fitted in the outer cover groove, can rotate synchronously with driving disc with the assurance outer cover, and reduce the outer cover of clutch and the shearing that the axial joint of driving disc screw is born.But 8 grooves are set on the outer cover circumference in equal parts, to cause the intensity of outer cover to weaken, for the intensity that prevents outer cover weakens, described outer cover adopts the impact briquetting of steel plate pull and stretch that the steel plate outer cover of 8 grooves is arranged, and the outer cover circumferential inner wall is located on 8 groove circumference in equal parts ground respectively.Because outer cover adopts the impact briquetting of steel plate pull and stretch, the tensile strength of its mechanical property and specific elongation all are better than the aluminum alloy outer cover, even increased groove quantity, the intensity of its steel plate outer cover is unaffected, thoroughly solved original outer moment of torsion that covers on and increased the back problem of fracture easily, prolonged the working life of clutch.And, adopt the stamping forming steel plate outer cover of steel plate pull and stretch, the fabricating cost of clutch also is reduced.

As further improvement of these options, described centrifugal is centrifugal of eccentrically mounted weight, centrifugal is used for installing centrifugal groove by what bearing pin was supported in driving disc, this bearing pin is positioned at the position of departing from centrifugal center of gravity, with the bearing pin is the center, centrifugal two ends weight is inconsistent, and end face of its light end is that face contacts with push pedal under free state.When engine speed reaches about 2200 ± 100r/min, centrifugal heavily end produces centrifugal force under centrifugal action, position-limiting action because of bearing pin, centrifugal its heavy end can only rotate and its end is together rotated around bearing pin under centrifugal action, because the end face of light end is that face contacts with push pedal under free state, centrifugal end face generation angle that contacts with push pedal changes when rotating, promote push pedal thus and carry out axial displacement, the rotating plate and the driven plate of friction pair compressed transferring power.Because centrifugal is centrifugal of eccentrically mounted weight, centrifugal quality is increased the weight of, and can produce bigger centrifugal force, the thrust to push pedal that forms when centrifugal motion is enhanced, the promotion push pedal is strong, for friction pair provides bigger positive pressure, and then increased the moment of torsion that clutch can transmit, made the transmission of power of clutch stable and strong.

The transmission of power of the utility model clutch is stable and strong, transmitting torque is big, is difficult for skidding, and therefore the less relatively clutch of the enough volumes of energy satisfies the transmission of power of the relatively large motor of air displacement, and can reduce production costs, have extensive market prospects.

The utility model is described in further detail below in conjunction with drawings and Examples.

Description of drawings

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

Fig. 2 is the axial schematic representation of driving disc of the present utility model;

Fig. 3 is centrifugal distribution map that is installed on the driving disc.

In the accompanying drawing, 1 is screw, and 2 is centrifugal, and 3 is bearing pin, 4 is outer cover, and 5 is driving disc, and 5-1 is a tooth, and 5-2 is used to install centrifugal groove, 6 are push pedal, and 7 is driven plate, and 8 is rotating plate, and 9 is baffle plate, 10 are the driven disc combination, and 10-1 is the centering sliding sleeve, and 11 is driving gear, and 12 is pressure spring, 13 is circlip, and 14 is damping spring, and 15 is floor clip, and 16 is saucer washer, 17 is nut, and 18 is clutch spring, and 19 is bent axle, and 20 is spring holder.

Embodiment

Referring to Fig. 1 to Fig. 3, the driving disc 5 of clutch is provided with the splined hole that is connected with bent axle 19, the clutch that assembles forms spline fitted by the splined hole of driving disc 5 and the right bent axle 19 of motor, and the axle head of right bent axle 19 puts floor clip 15 and saucer washer 16 backs are fastening with nut 17.Outer cover 4 axial ends of clutch are connected and fixed by screw 1 and driving disc 5, be with clutch spring 18 respectively on several cylinders of fixing in order to screw 1 on the driving disc, the tension force of these clutch springs 18 and screw 1 pressure are granted the other way around, guarantee that screw 1 can not become flexible, the outer cover 4 and the driving disc 5 of clutch can be fixed together firmly.Be respectively arranged with 8 tooth 5-1 and 8 on the described driving disc 5 circumference in equal parts and be used to install centrifugal groove 5-2, tooth 5-1 and groove 5-2 are provided with at interval along driving disc 5 circle alternates, can make centrifugal motion ground for 8 centrifugal 2 and be installed in respectively and be used for installing centrifugal groove 5-2 and contact with push pedal 6.Described centrifugal 2 is centrifugal of eccentrically mounted weight, and centrifugal 2 is used for installing centrifugal groove 5-2 by what bearing pin 3 was supported in driving disc 5, and the gap between two ends of bearing pin 3 is engaged in the fitting recess that groove 5-2 two ancient piece of jade, round, flat and with a hole in its centres that are used for installing centrifugal are provided with.This bearing pin 3 is positioned at the position of departing from centrifugal center of gravity, is the center with bearing pin 3, and centrifugal 2 two ends weight is inconsistent, and the end face of its light end contacts for face with push pedal 6 under free state.Described outer cover 4 is the steel plate outer cover that the impact briquetting of steel plate pull and stretch has 8 grooves, and the outer cover circumferential inner wall is located on 8 groove circumference in equal parts ground respectively, and 8 teeth on driving disc corresponding matching respectively form spline fitted in 8 grooves of outer cover.Between outer cover 4 and the driven disc combination 10 the friction pair combination is set, the rotating plate 8 of friction pair combination forms spline fitted with the groove of outer cover 4, the driven plate 7 of friction pair combination makes up 10 driven disc spline fitted with driven disc, the friction pair combination is between push pedal 6 and baffle plate 9, its axial end is adjacent with push pedal 6, the other end is adjacent with baffle plate 9, and push pedal 6 and baffle plate 9 all form spline fitted with the groove of outer cover 4.Be provided with pressure spring 12 between the part that described push pedal 6 and baffle plate 9 inserts in the outer cover grooves, the tension force by pressure spring 12 supports push pedal 6 and baffle plate 9, and friction pair is combined under the free state, and its rotating plate 8 is in separated state with driven plate 7.The two ends of this pressure spring 12 are enclosed within respectively on the spring holder 20 that push pedal 6 and baffle plate 9 be respectively equipped with, described spring holder 20 respectively separately riveting fix on part in the insertion outer cover groove of push pedal 6, baffle plate 9.Described driven disc combination 10 cooperates rotatably with driving disc 5, the centering sliding sleeve 10-1 and driving disc 5 Spielpassung of driven disc combination 10, the end of centering sliding sleeve 10-1 is provided with internal tooth, internal tooth and Spielpassung driving gear 11 engagements on bent axle 19 of centering sliding sleeve by being provided with, driving gear 11 arrives gearbox (not shown) with transmission of power.Be connected with circlip 13 in the cover mouth of outer cover 4 baffle plate 9 is blocked, anti-baffle plate comes off from clutch.Also uniformly between driving disc 5 and outer cover 4 be provided with four damping springs 14, can alleviate the impact that produces in the transmission of power.

When engine speed reaches about 2200 ± 100r/min, centrifugal on the driving disc because action of centrifugal force forms centrifugal motion, generation is to the thrust of push pedal, overcome the resistance of pressure spring when thrust after, promote push pedal to the displacement of baffle plate direction, make the master and slave moving plate of friction pair compress transferring power, driven plate drives the driven disc combination and rotates, power is passed to driving gear through the centering sliding sleeve, make the power of motor output be delivered to motor cycle rear wheel through clutch, driving gear, driven gear, gearbox, sprocket wheel, chain; When engine speed is reduced to 1500 ± 100r/min, the centrifugal force of centrifugal generation can not overcome the resistance of pressure spring, the tension force of pressure spring promotes the push pedal return, the stress reduction that friction pair obtains, the master and slave moving plate of friction pair separates, clutch is in separated state, cuts off the power output of motor.

Claims

1. friction disk type automatic clutch, the driving disc of clutch is provided with the splined hole that is connected with bent axle, the outer cover of clutch is connected with driving disc by screw, between outer cover and the driven disc combination friction pair combination is set, the friction pair built-up shaft is adjacent to an end and push pedal, the other end and baffle plate are adjacent, the driven disc combination cooperates rotatably with driving disc, it is characterized in that: be respectively arranged with 8 teeth and 8 described driving disc circumference in equal parts and be used to install centrifugal groove, tooth and groove are provided with at interval along the driving disc circle alternate, can make centrifugal motion ground for 8 centrifugal is installed in the groove that is used for installing centrifugal respectively and contacts with push pedal, described outer cover has the steel plate outer cover of 8 grooves for the pull and stretch impact briquetting, the outer cover circumferential inner wall is located on 8 groove circumference in equal parts ground respectively, 8 teeth on the driving disc are distinguished corresponding matching in 8 grooves of outer cover, push pedal, the rotating plate of baffle plate and friction pair combination all with the outer cover spline fitted.

2. the described friction disk type automatic clutch of claim 1, it is characterized in that: described centrifugal is centrifugal of eccentrically mounted weight, centrifugal is used for installing centrifugal groove by what bearing pin was supported in driving disc, this bearing pin is positioned at the position of departing from centrifugal center of gravity, with the bearing pin is the center, centrifugal two ends weight is inconsistent, and end face of its light end is that face contacts with push pedal under free state.

3. the described friction disk type automatic clutch of claim 1 is characterized in that: be provided with pressure spring between described push pedal and the baffle plate.