CN2752535Y

CN2752535Y - Friction clutch

Info

Publication number: CN2752535Y
Application number: CN 200420122319
Authority: CN
Inventors: 张坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-30
Filing date: 2004-12-16
Publication date: 2006-01-18
Anticipated expiration: 2014-12-16

Abstract

The utility model discloses a friction clutch used on motorcycles, which can enlarge the combining positive pressure between friction plates in the riding process. The utility model comprises a center sleeve, a platen, an outer casing and a friction transmission pair, wherein the friction transmission pair is composed of a plurality of driving friction plates and driven friction plates which are mutually matched at intervals. The driving friction plates are freely sheathed on a spline shaft of the center sleeve, and external teeth of the driving friction plates are matched with a chute of the outer casing. Internal teeth of the driven friction plates are matched with a spline groove of the center sleeve, and the spline groove is an oblique groove of which the oblique direction is matched with the rotation direction of the outer casing. The friction clutch has an automatic tension function, the tensioning force is increased following the increasing of the rotary speed, and the friction clutch is easier to disengage, so the service life of the friction plates is extended. The utility model has the advantages of high combining speed, large positive pressure, little noise, convenient and flexible operation and little abrasion of friction pairs, and the reliability of the friction transmission is increased. The utility model can be widely applied to various mechanism devices, vehicles, etc. on the occasions using the friction clutch.

Description

A kind of friction clutch

Technical field

The utility model relates to the clutch that uses on a kind of Motor Vehicle, especially a kind of friction clutch that is adapted at using on the motorcycle.

Background technique

The friction clutch that the current mobility car especially uses on the motorcycle mainly comprises central sleeve, platen, outer casing and a plurality of active friction plate and the friction driving pair of forming from movable friction plate, active friction plate and being placed in from movable friction plate on the splined shaft of central sleeve, output shaft passes and central sleeve is fixed on the output shaft from the center of input shaft.The active friction plate sky is enclosed within on the splined shaft, its external tooth cooperates the moment of torsion that is used to transmit circumferencial direction with chute on the outer casing, the direction of chute is axial straight trough, can be so that active friction plate also can move axially along chute in the moment of torsion that transmits circumferencial direction; Internal tooth from the movable friction plate cooperates the moment of torsion that is used to transmit circumferencial direction with the spline on the central sleeve splined shaft, the direction of spline also is conventional straight trough vertically, can be so that driven friction plate also can move axially along spline in the moment of torsion that transmits circumferencial direction.When normality, by spring make central sleeve end face and platen end face compress active friction plate with from movable friction plate, friction driving vice division chief is in working state, spring is in compressive state, the power torque of motor passes to outer casing, by outer casing-active friction plate-come transmitting torque from the order of movable friction plate-central sleeve-output shaft, therefore for the friction clutch of determining model, the sense of rotation of its outer casing is determined; When external force pushing lift slab, spring is continued compression, this moment, central sleeve was not removable, the platen end face moves away from the central sleeve end face, distance between platen end face and the central sleeve end face strengthens and to make active friction plate and the gap to occur between the movable friction plate, friction driving vice division chief is in disengaged condition, and this moment, moment of torsion can not transmit by friction driving is secondary.The friction clutch existing questions that existing Motor Vehicle friction clutch especially uses on the motorcycle is, after having exercised a period of time, friction plate occurs skidding because of reasons such as sclerosis, aging, wearing and tearing, separate and send phenomenon such as abnormal sound in conjunction with friction plate the time, its reason is not enough in conjunction with positive pressure diminishes between the friction driving pair that reason such as wearing and tearing, spring force reduction between the friction plate causes, thereby the working life of friction driving pair is not long, and the moment of torsion that is transmitted reduces along with the prolongation of service time.

The model utility content

For overcome existing friction clutch easily because of reasons such as wearing and tearing cause the deficiency that diminishes and skid in conjunction with positive pressure between the friction plate, technical problem to be solved in the utility model provide a kind of can be in the process of exercising the friction clutch between the increasing friction plate in conjunction with positive pressure.

The technological scheme that its technical problem that solves the utility model adopts is: this friction clutch comprises the active friction plate of central sleeve, platen, outer casing and the supporting setting in a plurality of spaces and the friction driving pair of forming from movable friction plate, the active friction plate sky is enclosed within on the splined shaft of central sleeve and its external tooth cooperates with chute on the outer casing, internal tooth from the movable friction plate cooperates with the spline on the central sleeve, spline is a skewed slot, and the true dip direction of its skewed slot and the sense of rotation of outer casing are suitable.That is to say, when outer casing rotation active transfer moment of torsion, the axial thrust load that can utilize the inclined-plane of the skewed slot of the spline on the central sleeve to provide, by from the internal tooth of movable friction plate will from movable friction plate to the extruding of central sleeve end face direction increase the friction driving pair active friction plate with from the positive pressure that combines between the movable friction plate.

The beneficial effects of the utility model are, owing to adopted the mode of the spline on the central sleeve being made the suitable skewed slot of the sense of rotation of true dip direction and outer casing, the inclined-plane of skewed slot will push to central sleeve end face direction from movable friction plate by the internal tooth from movable friction plate, make this friction clutch have the function of auto-tensioning, and along with the raising tension force of rotating speed is also big more; When separating friction clutch, because the inclined-plane of skewed slot is to the acting in opposition from the internal tooth of movable friction plate, the easier disengagement of feasible disengagement, thereby can increase the working life of friction plate, have, operation light and flexible, friction pair wearing and tearing little advantage fast, big, little in conjunction with noise in conjunction with positive pressure in conjunction with speed, can not occur skidding, relatively rotating friction yet and cause phenomenons such as friction plate ablation, improve the reliability of friction driving.

Description of drawings

Fig. 1 is the profile plan view of partly cut-away of the present utility model exposed portions serve central sleeve.

Fig. 2 is along the sectional view of A-A direction among Fig. 1.

Fig. 3 is the outline drawing of central sleeve of the present utility model.

Fig. 4 is the outline drawing of active friction plate of the present utility model.

Fig. 5 is the outline drawing from movable friction plate of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

Be labeled as central sleeve 1, platen 2, outer casing 3, active friction plate 4, among the figure from movable friction plate 5, chute 6, spline 7, output shaft 8, lift slab 9, external tooth 10, internal tooth 11, spring 12, central sleeve end face 13, platen end face 14, external tooth side 15, internal tooth side 16.

As Fig. 1～shown in Figure 5, friction clutch of the present utility model comprises the active friction plate 4 of central sleeve 1, platen 2, outer casing 3 and the supporting setting in a plurality of spaces and the friction driving pair of forming from movable friction plate 5, active friction plate 4 is provided with external tooth 10, is provided with internal tooth 11 from movable friction plate 5.Active friction plate 4 skies are enclosed within on the splined shaft of central sleeve 1 and its external tooth 10 cooperates with chute 6 on the outer casing 3, and the internal tooth 11 from the movable friction plate 5 cooperates with the spline 7 on the central sleeve 1.Spline 7 on the central sleeve 1 is a skewed slot, and the sense of rotation of the true dip direction of its skewed slot and outer casing 3 is suitable.That is to say, the true dip direction of skewed slot is determined by the sense of rotation of outer casing 3, guarantee when outer casing 3 rotation active transfer moments of torsion, the axial thrust load that can utilize the inclined-plane of the skewed slot of the spline 7 on the central sleeve 1 to provide, by from the internal tooth 11 of movable friction plate 5 will from movable friction plate 5 to the direction extruding of central sleeve end face 13 increase the friction driving pair active friction plate 4 with from the positive pressure that combines between the movable friction plate 5.

For the friction clutch of determining model, the sense of rotation of its outer casing 3 is determined.When normality, by spring 12 make central sleeve end face 13 and platen end face 14 compress active friction plate 4 with from movable friction plate 5, friction driving vice division chief is in working state, spring 12 is in compressive state, the power torque of motor passes to outer casing 3, comes transmitting torque by outer casing 3-active friction plate 4-from the order of movable friction plate 5-central sleeve 1-output shaft 8.Because central sleeve 1 is to be fixed on the output shaft 8, thereby can not move axially and beat, like this can be in outer casing 3 transferring power, outer casing 3 is a drive end, because it is central sleeve 1 that its speed is higher than the driven end of this moment, the inclined-plane of the skewed slot of the spline 7 on the central sleeve 1 by from the external tooth 11 of movable friction plate 5 will from movable friction plate 5 to the direction extruding of central sleeve end face 13 increased the friction driving pair in conjunction with positive pressure, thereby tensioning friction pair initiatively.Therefore, except providing by spring 12 active friction plate 4 and the positive pressure between movable friction plate 5, the ramp effect of the skewed slot of the spline 7 on the central sleeve 1 is in the axial thrust load of the thrust from the external tooth 10 of movable friction plate 5, also become active friction plate 4 with from the positive pressure that combines between the movable friction plate 5.

When the needs friction clutch separates, need to throw off the friction driving pair, external force pushing lift slab 9, spring 12 is continued compression, this moment, central sleeve 1 was not removable, and platen end face 14 moves away from central sleeve end face 13, and the distance increasing between platen end face 14 and the central sleeve end face 13 makes active friction plate and the gap occurs between the movable friction plate, friction driving vice division chief is in disengaged condition, and this moment, moment of torsion can not transmit by friction driving is secondary.Simultaneously, if this moment is owing to kill engine etc., because pushing lift slab 9 causes active friction plate 4 and the gap occurs between movable friction plate 5, make positive pressure disappear, this moment, outer casing 3 was a driven end, the drive end that its speed is lower than this moment is a central sleeve 1, and make that the ramp effect of skewed slot of the spline 7 on the central sleeve 1 is reverse in the axial thrust load of the thrust from the internal tooth 11 of movable friction plate 5, the inclined-plane of skewed slot that is the spline 7 on the central sleeve 1 will be by quickening to separate active friction plate 4 and from movable friction plate 5 to pushing open away from the direction of central sleeve end face 13 from movable friction plate 5 from the internal tooth 11 of movable friction plate 5, release friction driving pair, thereby reach the purpose of quick separation friction driving pair, further improved the efficient and the reliability of throw-out-of clutch.

In general, because the principle of having used the inclined-plane that utilizes skewed slot to promote, the lift angle of the skewed slot of described spline 7 only otherwise form self-locking just.The spline 7 that is made on the central sleeve 1 of skewed slot can be the skewed slot of various ways, if reach above-mentioned provide active friction plate 4 with from movable friction plate in conjunction with or the axial thrust load that separates.In order to go slick and easy to make, the skewed slot of spline 7 can be made spiral chute, the experiment proved that, the spiral fluted lead angle be generally 30～60 ° preferable, for example 40 °.

Same reason, the chute 6 on the described outer casing 3 also can be made skewed slot, and the true dip direction of chute 6 should be opposite with the true dip direction of spline 7 at this moment.So just can be so that in use, active friction plate 4 and from movable friction plate 5 same moved further moves to tension direction jointly during i.e. tensioning and presses to central sleeve end face 13; Move to detaching direction jointly during separation, promptly push platen end face 14 to, thereby further strengthen tensioning and effect of separating and efficient.

Same reason, the chute 6 that is made on the outer casing 3 of skewed slot can be the skewed slot of various ways, as long as reach above-mentioned provide active friction plate 4 with between the movable friction plate in conjunction with or separate required axial thrust load.In order to go slick and easy to make, chute 6 can be made spiral chute, the experiment proved that, the spiral fluted lead angle be generally 30～60 ° preferable, for example 40 °.

True dip direction and chute 6 consistent inclined-plane or arc surface can be made in the external tooth 10 of above-mentioned active friction plate 4 and the external tooth side 15 that contacts with chute 6.Same reason also can be made true dip direction and spline 7 consistent inclined-plane or arc surface from the internal tooth side 16 of the internal tooth 11 of movable friction plate 5 and spline 7 contacts.

Claims

1, a kind of friction clutch, comprise central sleeve (1), platen (2), the active friction plate (4) of outer casing (3) and the supporting setting in a plurality of spaces and the friction driving pair of forming from movable friction plate (5), active friction plate (4) sky is enclosed within on the splined shaft of central sleeve (1) and its external tooth (10) cooperates with chute (6) on the outer casing (3), internal tooth (11) from the movable friction plate (5) cooperates with the spline (7) on the central sleeve (1), it is characterized in that: the spline (7) on the described central sleeve (1) is a skewed slot, and the sense of rotation of true dip direction of its spline (7) and outer casing (3) is suitable.

2, friction clutch as claimed in claim 1 is characterized in that: described spline (7) is a spiral chute.

3, friction clutch as claimed in claim 2 is characterized in that: described spiral fluted lead angle is 30～60 °.

4, friction clutch as claimed in claim 3 is characterized in that: described spiral fluted lead angle is 40 °.

5, friction clutch as claimed in claim 1 is characterized in that: described chute (6) is a skewed slot, and the true dip direction of chute (6) is opposite with the true dip direction of spline (7).

6, friction clutch as claimed in claim 1 is characterized in that: described chute (6) is a spiral chute.

7, friction clutch as claimed in claim 6 is characterized in that: the lead angle of described chute (6) is 30～60 °.

8, friction clutch as claimed in claim 7 is characterized in that: the lead angle of described chute (6) is 40 °.

9, according to any described friction clutch of claim in 1～8, it is characterized in that: the external tooth side (15) that described external tooth (10) contacts with chute (6) is inclined-plane or arc surface.

10, according to any described friction clutch of claim in 1～8, it is characterized in that: the internal tooth side (16) that described internal tooth (11) contacts with spline (7) is inclined-plane or arc surface.