CN1316174C - Irregular friction clutch - Google Patents

Abstract

The present invention relates to an irregular friction clutch which mainly solves the technical problems of easy abrasion, short service life, small transmission torsional moment, etc. of the existing friction clutch. The present invention is characterized in that more than one bulge ring and more than one annular groove of a left semi-friction disk are arranged on the left semi-friction disk sheathed on a driven shaft in a clearance fit, and the bulge rings and the annular grooves of the left semi-friction disk use an axial line of the left semi-friction disk as a central line; the grooves and the annular bulge rings of a right semi-friction disc are arranged on the right semi-friction disc sheathed on a drive shaft in a stationary fit, and the grooves and the annular bulge rings of a right semi-friction disc correspond to those of the left semi-friction disk, use an axial line of the right semi-friction disc as a center line and are matched with the bulge rings and the annular grooves of the left semi-friction disc; the bulge rings and the annular grooves of the left semi-friction disc and the grooves and the annular bulge rings of the right semi-friction disc are taper grooves with a taper angle and taper bulge rings with a taper angle. The present invention can be widely applied to various machines which need clutches with small impact and vibration and large transmission torsional moment. The present invention has the advantages of convenient engagement and separation, simple manufacturing process, low construction cost, long service life, small volume and large transmitted power.

Description

Shaped friction clutch

Technical field

The invention relates to a friction clutch in the mechanical field.

Background technique

At present, due to the small impact and vibration of friction clutches, they are widely used in the mechanical field. However, the existing friction clutches mainly use friction discs in plane contact, which are prone to wear and affect their service life, and because of their relatively small transmission torque, Difficult to achieve high torque transmission.

Contents of the invention

The object of the present invention is to provide a special-shaped friction clutch with longer service life, less impact and vibration, and larger transmission torque.

The technical scheme adopted by the present invention to solve its technical problems is: it is composed of the left half friction disc 3 on the driven shaft 1 that is movable and fitted and the right half friction disc 8 that is fixed and fitted on the driving shaft 10, and is characterized in that: The half friction disc 3 is provided with more than one left half friction disc protruding ring 4 and the left half friction disc annular groove 5 with the axis line of the left half friction disc 3 as the center line, and the right half friction disc 8 is provided with Corresponding to the left half friction disc, the right half friction disc groove 6 with the axis line of the right half friction disc 8 as the center line and matched with the left half friction disc convex ring 4 and the left half friction disc annular groove 5 And the right half friction disc annular protruding ring 7, the left half friction disc protruding ring 4, the left half friction disc annular groove 5, the right half friction disc groove 6 and the right half friction disc annular protruding ring 7 are tapers with a taper angle Q Groove or tapered convex ring, the taper angle Q is greater than 0 degrees and less than 45 degrees. The left half friction disc protruding ring 4 and the left half friction disc annular groove 5 have the same shape and specification as the right half friction disc groove 6 and the right half friction disc annular protruding ring 7 respectively. Friction discs 11 with a large wear-resistant friction coefficient are fixed on both sides of the convex ring of the friction disc, and there is a gap between the inner end of the friction disc 11 and the bottom of the groove. The preferred solution is that the inclination angle Q of the tapered surfaces on both sides of each groove or convex ring is the same, and the taper angle Q is greater than 2 degrees and less than 7 degrees. The left half of the friction disc is connected by a spline, and the inner wall of the wheel hub and the driven shaft are tightly fitted or loosely fitted. A cavity is provided in the center of the left half friction disc or the right half friction disc, and a boss 12 is provided in the center of the corresponding right half friction disc or the left half friction disc. The specifications and dimensions of the central cavity of the left or right half friction disc Make it keep in contact with the same central boss of the right or left half friction disc, and also can be larger than the central boss so that it does not contact friction.

The beneficial effect of the invention is that the joint and separation are convenient, the process is simple, and the cost is low; and because the replaceable friction plate made of wear-resistant material is provided, the service life of the friction plate is greatly improved and the service life is long. Another notable feature is that it is small in size but delivers high power.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a structural schematic diagram of the present invention.

Figure 2 is a right side view of the left half clutch.

FIG. 3 is a schematic structural view of Embodiment 2.

Fig. 4 is a schematic view of the joint state in the working state of the second embodiment.

Figure 5 is a force analysis diagram of the friction surface.

In the figure 1. driven shaft, 2. clutch ring, 3. left half friction disc, 4. left half friction disc convex ring, 5. left half friction disc ring groove, 6. right half friction disc groove, 7 .Right half friction disc annular protruding ring, 8. Right half friction disc, 10. Drive shaft, 11. friction plate, 12. central boss of the right half friction disc.

Detailed ways

Embodiment 1, as can be seen from Fig. 1, Fig. 2 and Fig. 5, the present invention is composed of the left half friction disc 3 on the driven shaft 1 which is movable and fitted and the right half friction disc 8 which is fixedly fit and fitted on the driving shaft 10, the left half The friction disc 3 is provided with a clutch dial 2, and the left half friction disc 3 is provided with two left half friction disc convex rings 4 with the axis line of the left half friction disc 3 as the center line and a left half friction disc ring Groove 5, the right half friction disc 8 is provided with an annular groove corresponding to the left half friction disc with the axis line of the right half friction disc 8 as the center line and the left half friction disc convex ring 4 and the left half friction disc 5 Matching right half friction disc groove 6 and right half friction disc annular protruding ring 7, left half friction disc protruding ring 4, left half friction disc annular groove 5, right half friction disc groove 6 and right half friction disc The annular protruding ring 7 is a tapered groove or a tapered protruding ring with a taper angle Q, and the taper angle Q is greater than 0 degrees and less than 45 degrees. The left half friction disc protruding ring 4 and the left half friction disc annular groove 5 have the same shape and specification as the right half friction disc groove 6 and the right half friction disc annular protruding ring 7 respectively. The surface of both sides of the convex ring of the friction disc is fixed with a friction plate 11 with a large wear-resistant friction coefficient. A certain gap is maintained between the inner end of the friction plate 11 and the bottom of the groove, so that the convex ring can be extended and then deepened after the friction plate is partially worn. groove so that the ring is always in contact with the friction disc.

The left half of the friction disc adopts spline connection, and the inner wall of the wheel wheel and the driven shaft can be tightly fitted or clearance fit can be maintained, because the tight fit can make the integrity better, and the clearance fit can compensate for the gap between the two shafts. Various displacements, so that it can better cooperate during operation.

A cavity is provided in the center of the left half friction disc or the right half friction disc, and a boss 12 is provided in the center of the corresponding right half friction disc or the left half friction disc. The specifications and dimensions of the central cavity of the left or right half friction disc Both can be the same as the central boss of the right or left half friction disc so as to keep in contact, to increase the transmission torque. It is also possible to make the central cavity larger than the central boss 12 so that it does not contact the friction, so that the frictional heat generated near the driving shaft and the driven shaft can be avoided from being transmitted to the driving shaft and the driven shaft.

Because the transmission principle of the clutch is changed, according to mechanical analysis, the clutch can be made smaller, and the left and right half friction discs can be made of cheap gray cast iron, thereby saving manufacturing cost.

As can be seen from the accompanying drawings, the present invention does not need to completely separate the left and right friction discs as shown in the accompanying drawings when disengaging the clutch, and only needs to move a small distance to disengage and realize clutch separation.

Embodiment 2, as can be seen from Figures 3-5, the left half friction disc 3 is provided with three left half friction disc convex rings 4 with the axis line of the left half friction disc 3 as the centerline and two left half friction discs Annular groove 5, the right half friction disc 8 is provided with the axis line of the right half friction disc 8 corresponding to the left half friction disc as the center line and is connected with the left half friction disc protruding ring 4 and the left half friction disc ring. 2 or 3 right half friction disk grooves 6 and 2 right half friction disk annular protruding rings 7 matched with the groove 5, the height of the central boss can be less than the depth of the central cavity. All the other are with embodiment 1.

Embodiment 3, the structure of the contact surfaces of the left half friction disc and the right half friction disc in Embodiment 1 and Embodiment 2 can be interchanged, that is, the corresponding structural forms of the central cavity, central boss, groove and boss Interchangeable settings. And more grooves and protruding rings can be provided as required. All the other are the same as embodiment 1 and embodiment 2.

Embodiment 4, the left and right half friction discs of the present invention are made of wear-resistant materials, and friction sheets may not be provided on both sides of the groove or the convex ring, as long as the shape of the convex ring is consistent with the groove, the size of the convex ring is larger than The size of the groove can achieve the purpose of the present invention. All the other are the same as above embodiment.

In Embodiment 5, the inclination angle Q of the tapered surfaces on both sides of each groove or protruding ring is the same, so that the processing is more convenient and the force is more uniform. The best implementation is that the taper angle Q is greater than 2 degrees and less than 7 degrees. Because the friction disc is a circular disc, the radial force Fr of the grooves of the left and right friction discs and the protruding ring cancels each other without generating the radial force of the friction disc. Mechanical analysis is carried out as follows: the friction force of each friction surface is F=fFn, f is the friction coefficient, and Fn is the normal surface pressure of the friction surface. And Fn=Fa/sinQ,

When Q=2.5°, Fn=Fa/sinQ=Fa/sin2.5°=Fa/0.0436=22.94Fa. Therefore, the friction force F produced by each friction surface is 22.94 times that of the plane friction disc.

When Q=3.5°, Fn=Fa/sinQ=Fa/sin3.5°=Fa/0.061=16.39Fa. Therefore, the friction force F produced by each friction surface is 16.39 times that of the plane friction disc.

When Q=5°, Fn=Fa/sinQ=Fa/sin5°=Fa/0.087=11.494Fa. Therefore, the friction force F produced by each friction surface is 11.49 times that of the plane friction disc.

When Q=7°, Fn=Fa/sinQ=Fa/sin7°=Fa/0.12=8.33Fa. Therefore, the friction force F produced by each friction surface is 8.33 times that of the plane friction disc.

Claims (5)

1. A special-shaped friction clutch, which is composed of the left half friction disc (3) on the driven shaft (1) that is movable and fits on the driven shaft (1) and the right half friction disc (8) that is fixed and fit on the driving shaft (10). Yes: the left half friction disc (3) is provided with more than one left half friction disc convex ring (4) and left half friction disc annular groove ( 5), the right half friction disc (8) is provided with the centerline of the axis line of the right half friction disc (8) opposite to the left half friction disc and is connected with the left half friction disc protruding ring (4) and the left half The right half friction disc groove (6) and the right half friction disc annular protruding ring (7) matched with the friction disc annular groove (5), the left half friction disc protruding ring (4), the left half friction disc annular groove ( 5), the right half friction disk groove (6) and the right half friction disk annular protruding ring (7) are tapered grooves or tapered convex rings with a taper angle Q, and the taper angle Q is greater than 0 degrees and less than 45 degrees. 2. The special-shaped friction clutch according to claim 1, characterized in that: the convex ring (4) of the left half friction disc and the annular groove (5) of the left half friction disc are respectively connected with the groove (6) of the right half friction disc and the right The shapes and specifications of the annular protruding rings (7) of the half-friction discs are the same, and friction plates (11) with a relatively large wear-resistant friction coefficient are fixed on the surfaces of both sides of the protruding rings of the left half-friction disc or the protruding ring of the right half-friction disc. There is a gap between the inner end of (11) and the groove bottom. 3. The special-shaped friction clutch according to claim 2, characterized in that: the inclination angle Q of the conical surfaces on both sides of each groove or protruding ring is the same, and the taper angle Q is greater than 2 degrees and less than 7 degrees. 4. The special-shaped friction clutch according to claim 1, characterized in that: the left half of the friction disc is connected by a spline, and the inner wall of the wheel wheel and the driven shaft are tightly fitted or loosely fitted. 5. The special-shaped friction clutch according to claim 1, characterized in that: a cavity is provided in the center of the left half friction disc or the right half friction disc, and a cavity is provided in the center of the corresponding right half friction disc or left half friction disc. Boss (12), the specification size of the central cavity of left or right half friction disc is identical with the central boss of right or left half friction disc so that it keeps in contact, or is larger than central boss so that it does not contact friction.

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