KR100827768B1 - Centrifugal clutch - Google Patents

Abstract

A centrifugal clutch is provided to reduce noise generated when a lining contacts with a fixed body by forming grooves at two ends of the lining to be contacted with the central part of the fixed body. A centrifugal clutch comprises a flange(110), a rotor(130), a plurality of linings(150), and a drum(180). The flange is fastened to a drive unit. The rotor is fastened to the flange, and provided with a hole at the center. A bearing(131) is installed on the inner surface of the rotor. A plurality of fixed bodies are attached to the outer surface of the rotor. The linings, which shape into an arc, are installed between the fixed bodies. Each lining has inclined grooves(153) and arc grooves(151). Springs are installed in the inclined grooves formed at two lateral sides of the lining. The arc grooves, which are formed at two ends of the lining, contact with the fixed body. The rotor is mounted on a fixed shaft protruded at the center on opened side of the drum by interposing the bearing. To control torque of the drum, the lining contacts with the inner surface of the drum and separates from the inner surface of the drum.

Description

Centrifugal Clutch

Figure 1a is a schematic view showing a power transmission device using a conventional centrifugal clutch.

Figure 1b is an exploded perspective view showing a conventional centrifugal clutch.

Figure 1c is a cross-sectional view showing a conventional centrifugal clutch.

Figure 2 is a perspective view showing a centrifugal clutch according to the first embodiment of the present invention.

3 is an exploded perspective view showing the centrifugal clutch according to the first embodiment of the present invention from one side;

4 is an exploded perspective view showing the centrifugal clutch according to the first embodiment of the present invention from the other side;

5 is a cross-sectional view showing a state before the centrifugal clutch is operated according to the first embodiment of the present invention.

Figure 6 is a cross-sectional view showing a state after the centrifugal clutch according to the first embodiment of the present invention is operated.

7 is a sectional view showing a drum of the centrifugal clutch according to the second embodiment of the present invention.

8 is a sectional view showing a drum of the centrifugal clutch according to the third embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

100: centrifugal clutch

110: flange 111: first coupling hole

112: through hole 113: fastening hole

130: rotor 131: bearing

132: spring 133: second coupling hole

134: close groove 135: fixed body

150: lining 151: semicircular groove

152: spring 153: inclined groove

155: hemisphere groove 180: drum

181: pulley 182: fixed shaft
183: engaging jaw 184: fixing hole
185: fixing plate 186: through hole
187; Through hole

The present invention relates to a centrifugal clutch, and more particularly to a centrifugal clutch for transmitting the rotational force of the input shaft to the output shaft.

As is well known, the centrifugal clutch transmits the rotation of the input shaft to the output shaft when the rotation of the input shaft reaches a constant speed.

When the engine speed is low, such a centrifugal clutch cannot transmit torque because the centrifugal force is smaller than the force of the return spring. However, when the engine speed is increased to some extent, the shoe starts to be pushed onto the fuselage of the clutch and slides to transmit torque. In addition, as the number of revolutions increases, the force of the return spring is pressed and the slide disappears to completely transmit the torque.

Such centrifugal clutches are widely used in cleaning vehicles, refrigeration vehicles, industrial machinery, and the like, which require power transmission. For example, Korean Patent Application No. 2002-1984 (hereinafter referred to as "prior art") refers to "road cleaning vehicles." Power transmission device using a centrifugal clutch of the present invention, which is illustrated in FIGS. 1A to 1C.

As shown in FIG. 1, the prior art centrifugal clutch has a clutch cover 20 fixed to a flywheel 8 of an auxiliary engine 2, and a drum in which a rotation shaft 21 is axially coupled to the clutch cover 20. 30 and the clutch pad assembly 40 which is installed between the clutch cover 20 and the drum 30 to transmit or control power by centrifugal force and a tension spring, and is detachably installed on the outer circumferential edge of the drum 30. It is made of a pulley (50).

In addition, the bush 22 and the bearing 23 are coupled to the center of the clutch cover 20 to support the rotation shaft 21 fixed to the drum 30 so as to be rotatable, and a partition protrusion projecting in three directions on the outer circumference thereof. 24 is integrally formed, and an installation groove 25 is formed between these partition protrusions 24.

In addition, three separate clutch pads 41 are mounted on the outer circumferential surface of the clutch pad assembly 40, and front and rear tension springs 42 and 43 are mounted at both ends of the clutch pad assembly 40.

Such a prior art centrifugal clutch has a clutch pad assembly 40 in which the clutch pad assembly 40 is driven by the elastic force of the tension springs 42 and 43 when the auxiliary engine 2 is at a fixed speed or lowered in a stopped state or idling state. Since the state stuck to the drum 30 and spaced apart, the power of the auxiliary engine 2 is not transmitted to the drum (30).

When the rotation speed of the auxiliary engine 2 is increased in this rotation state, the clutch pad assembly 40 is released from the tension force of the tension springs 42 and 43 by the moment of inertia, thereby causing the clutch pad assembly 40 to close the clutch cover 20. It is pushed outward from the installation groove 25 formed on the outer periphery of the drum 30 is in close contact with the inner peripheral surface of the drum 30, the power of the clutch cover 20 is transmitted to the drum 30 by the frictional force.

However, such a prior art centrifugal clutch requires an inertia moment greater than the elastic force of the tension springs 42 and 43 wound around the outer circumferential surface of the clutch pad assembly 40 so that the clutch pad assembly 40 is applied to the inner circumferential surface of the drum 30. Since it is in close contact, there is a difficulty in rotating the rotating shaft 21 at a high speed.

In addition, the clutch cover 20 is integrally formed with a rotor extending to one side (that is, a portion formed with the partition protrusion 24 and the installation groove 25), so that the coupling spring 24 is coupled through the partition protrusion 24 when the tension spring 42 is coupled. , The elasticity of the tension spring 42 is increased, the spring constant is reduced.

In addition, the tension spring 42 is assembled by the tool tool is a safety accident that is injured or injured by the operator is separated or damaged from the tool tool, the assembly of the tension spring 42 is difficult to take a long time, as well as increase the production cost problems there was.

In addition, when the lining pad contacts the inner surface of the drum, the contact time is delayed due to the tension force of the tension spring, which makes it difficult to crack the centrifugal clutch, and the centrifugal clutch is used in a lot of sand or dust such as the Middle East. There is a problem that the frictional force of the centrifugal clutch is lowered due to sand, dust, etc., thereby causing the rotational force of the centrifugal clutch to drop.

The present invention has been made to solve the above problems, the object of the present invention is that the rotor and the flange is made of a detachable type, the spring assembly is simple, as well as a simple structure consisting of shortening the assembly time of the centrifugal clutch and safety accidents during assembly It is to provide a centrifugal clutch that does not occur.

In addition, another object of the present invention is to fix the lining pads at both ends of the lining to alleviate the impact generated when the lining is in contact with the rotor, the impact is alleviated, the centrifugal clutch to be carried out quickly by the lining is moved quickly by the centrifugal force To provide a centrifugal clutch.

In order to achieve the above object, the centrifugal clutch of the present invention is a hollow cylinder having a plurality of fixed bodies protruding from a flange fixed to a driving means, the flange being fastened to the flange and the inner circumferential surface thereof coupled to the outer circumferential surface thereof. Rotor made of lining is formed in an arcuate shape disposed on the outer circumferential surface between the fixing body of the rotor and the inclined groove formed inclined toward the center from both sides so that the spring is fitted on both sides and semi-circular grooves in contact with the fixing body at both ends, The rotor is coupled to the fixed shaft protruding from the center of the open one side through the bearing and the inner circumferential surface is characterized in that it comprises a drum in which the lining is in contact or non-contact intermittent rotation.

Figure 2 is a perspective view showing the centrifugal clutch of the present invention, Figure 3 is an exploded perspective view showing the centrifugal clutch of the present invention from one side, Figure 4 is an exploded perspective view showing the centrifugal clutch of the present invention from the other side, Figure 5 is Fig. 6 is a cross-sectional view showing a state before the centrifugal clutch of the present invention is operated, and Fig. 6 is a cross-sectional view showing a state after the centrifugal clutch of the present invention is operated.

2 to 6, the centrifugal clutch 100 of the present invention is coupled to the outer peripheral surface of the rotor 110, the rotor 130 rotated by the rotation of the flange 110, the flange 110 is coupled to the auxiliary engine, etc. Lining 150 is made of a pulley 181 integrally formed on the outer circumferential surface of the drum 180 is rotated by the rotation of the lining 150.

The flange 110 is formed in a disc shape, a plurality of first coupling holes 111 are formed in the central portion and coupled to the rotor 130, and a plurality of through holes are formed outside the first coupling holes 111 to allow external air to pass through. A ball 112 is formed, and a plurality of fastening holes 113 coupled to a driving means such as an auxiliary engine are formed outside the through hole 112.

The rotor 130 is formed of a hollow cylindrical shape, and a locking jaw 132 is formed at one side of the inner diameter so that the bearing 131 is fitted into the rotor 130, and the first coupling hole 111 of the flange 110 is formed at one side of the rotor 130. ) And the second coupling hole 133 is formed.

In addition, a plurality of fitting grooves 134 are formed on the outer circumferential surface of the rotor 130, and a circular fixing body 135 protruding to the outer circumferential surface of the rotor 130 is fitted into these fitting grooves 134.

These fixing bodies 135 apply copper to the inner surface of the fitting groove 134, and apply heat in a furnace in a vacuum state while the fixing body 135 is inserted into the fitting groove 134. By welding, furnace brazing is used during torch brazing, induction brazing, deep brazing, and furnace brazing, but other brazing may be used as long as the fixture 135 is stably fixed.

In addition, these fixing bodies 135 may be fixed to the fitting groove 134 and may be formed integrally with the rotor 130, and the number of these fixing bodies 135 may be three or six as necessary. Of course, the number can be increased or decreased.

Lining 150 is coupled to the outer circumference of the rotor 130, the lining 150 is fixed between the fixing body 135 and the fixing body 135, both ends of the lining 150 in contact with the fixing body 135 A semicircular groove 151 having the same arc shape as the fixed body 135 is formed, and is made of an arc shape slightly smaller than the interval of the fixed body 135, and inclined grooves 153 into which the springs 152 are fitted. ) Is formed.

These inclined grooves 153 are fitted between the fixing body 135 by fitting the spring 152, the tension spring having elasticity so that the lining 150 is stuck to the inner peripheral surface of the drum 180 as the rotor 130 is rotated This is used.

That is, the lining 150 is a lining 150 is fixed by placing a plurality of lining 150 between the fixing body 135, respectively, and by inserting a circular spring 152 in the inclined groove 153 on both sides. .

In addition, hemispherical grooves 155 having a hemispherical shape are formed at both ends of the circular lining 150. The hemisphere groove 155 is formed in the shape of a part of the spherical surface from the semi-circular groove 151 to reduce the area in contact with the fixing body 135, and thus the semi-circular groove 151 is fixed body 135 ) To reduce noise, etc.

The drum 180 has a pulley 181 formed on an outer circumferential surface thereof, and one side contacting the flange 110 is opened to form a space in which the rotor 130 and lining 150 are embedded, and a flange is formed at the center of the space. A fixed shaft 182 protruding toward 110 is formed.

The rotor 130 is fitted to the fixed shaft 182, the locking jaw 183 is formed on the fixed shaft 182, and the bearing 131 fitted to the inner diameter of the rotor 130 is caught. The fixing hole 184 is formed.

In addition, the drum 180 is provided with a fixing plate 185. The fixing plate 185 is partially inserted into a bearing 131 at a position facing the fixing shaft 182, and a hole is inserted into the center of the fixing plate 185. 186 is formed.

On the other side of the drum 180, a plurality of through holes 187 are formed to discharge sand or dust.

In the centrifugal clutch 100 having such a configuration, the spring 152 is fitted into the inclined grooves 153 formed on both sides thereof while the lining 150 divided into a plurality of parts is positioned between the fixing bodies 135. It is fixed.

That is, as shown in Figure 5, the rotor 130 and the lining 150 of the present invention is assembled by fitting the spring 152 in the inclined groove 153 on both sides of the lining 150, flange 110 Since the rotor 130 is separated from each other, the spring 152 is inserted into the inclined groove 153 by jig or the like on both sides of the rotor 130.

Accordingly, the lining 150 is assembled to the outer circumferential surface of the rotor 130, inserts the bearing 131 into the inner diameter of the rotor 130, and fixes the rotor 130 and the bearing 131 to the fixed shaft 182 of the drum 180. )

The rotor 130 and the bearing 131 are fixed to the fixed shaft 182 in the state in which the fixing plate 185 is fixed to one side of the bearing 131 to fasten the fastening means such as a bolt to the fixing hole 184 by the rotor 130. ) And lining 150 are fixed to the drum 180.

Subsequently, one side of the drum 180 may face the flange 110 to match the first coupling hole 111 of the flange 110 with the second coupling hole 133 of the rotor 130, and then fasten a fastening means such as a bolt. The flange 110 and the rotor 130 are fixed.

The centrifugal clutch 100 assembled as described above is fastened to an auxiliary engine by fastening means such as a bolt to the fastening hole 113 of the flange 110.

The centrifugal clutch 100 is rotated while the flange 110 is rotated by a drive means such as an auxiliary engine. That is, the flange 110, as shown in Figure 5, the bearing 131 is coupled between the fixed shaft 182 and the rotor 130, so that even if the flange 110 and the rotor 130 is rotated drum 180 ) Will remain unrotated.

As the rotating speed of the flange 110 is increased, the lining 150 coupled to the outer circumferential surface of the rotor 130 generates centrifugal force due to the inertia force caused by the rotation of the rotor 130.

The lining 150 coupled to the rotor 130 is in close contact with the fixture 135 by rotating the rotor 130. The lining 150 is formed of a composite material such as a binder, a reinforcement, a friction adjusting material, and the lining 150 is fixed to the fixture 135. It reduces or greatly alleviates the noise generated by contact.

At this time, the lining 150 is in close contact with the flow of the fixed body 135 of the rotor 130, the initial contact is the lining 150 is rotated while the flow is rotated without being in close contact with the center of the fixed body 135, lining 150 As the number of revolutions increases, the lining 150 is in close contact with the center of the fixture 135.

That is, the fixing body 135 is formed in a circular shape, and semicircular grooves 151 are formed at both ends of the lining 150 so that the fixing body 135 is in close contact with the center of the fixing body 135 while the lining 150 is rotated.

In addition, if the rotor 130 and the lining 150 fixed to the flange 110 is rotated at a low speed of approximately 800 ~ 900rpm or less, the drum 180 is maintained in a non-rotating state, and if rotated at a high speed of 800 ~ 900rpm or more As shown in Figure 6, the lining 150 is in close contact with the inner peripheral surface of the drum 180 by centrifugal force.

As the rotation speed of the flange 110 increases, the lining 150, that is, the lining 150 is in close contact with the inner circumferential surface of the drum 180 due to frictional force with the inner circumferential surface of the drum 180 to rotate the drum 180.

At this time, the spring 152 fitted into the inclined groove 153 of the lining 150 is made of spring steel having elasticity so that the circular diameter of the spring 152 is increased by centrifugal force, and the lining 151 has an inner circumferential surface of the drum 180. To the side.

Accordingly, the rotational force of the flange 110 is transmitted to the rotor 130 and the lining 150 so that the drum 180 is rotated to transmit the power of the auxiliary engine.

The centrifugal clutch 100 is rotated in this way, such as sand or dust is introduced into the centrifugal clutch 100 according to the use area, and the sand or dust therein is passed through the flange 110 by the centrifugal force caused by the rotation. 112 is discharged to the outside through the through-hole 187 of the drum 180.

In addition, the outside air introduced into the through holes 112 and 187 cools the frictional heat generated when the lining 150 and the drum 180 are in friction, and the lining 150 generated when the lining 150 and the drum 180 are in friction. Dross or foreign substances are released to the outside.

In order to cut off the power transmitted to the drum 180, as the rotation speed of the auxiliary engine is lowered to 800 to 900 rpm or less, the rotation speed of the flange 110, the rotor 130, and the lining 150 is reduced, and the lining 150 The centrifugal force acting on the spring 152 is smaller than the elastic force of the spring 152, so that the lining 150 adheres to the outer circumferential surface of the rotor 130.

That is, the centrifugal force acting on the lining 150 is weakened, and the spring 152 is in close contact with the outer circumferential surface of the rotor 130 by the spring 152 fitted into the inclined groove 153 of the lining 150 by the elastic force.

Meanwhile, as shown in FIG. 7, in the second embodiment of the present invention, the pulley 190 and the drum 180a are separated.

Since the flange 110, the rotor 130, and the lining 150 of the centrifugal clutch 100a according to the second embodiment are the same as those of the first embodiment described above, the description thereof is omitted and the drum different from the first embodiment is omitted. 180a and the pulley 190 will be briefly described.

As shown in FIG. 7, the drum 180a has a fixed shaft 182 formed in a space in which one side is opened, and a first fastening hole in which the pulley 190 is fixed to the outside of the through hole 187 on the other side. 191 is formed.

In addition, the pulley 190 has a belt groove in which a belt is fitted on an outer circumferential surface thereof, and a second fastening hole 192 corresponding to the first fastening hole 191 of the drum 180a is formed in the pulley 190. The drum 180a and the pulley 190 are fastened and fastened by fastening means such as bolts.

In this second embodiment, the drum 180a and the pulley 190 are separated, and the pulley 190 is fixed to extend to one side of the drum 180a. The description will be omitted.

Meanwhile, as shown in FIG. 8, in the third embodiment of the present invention, the pulley 190a and the drum 180b are separated.

The centrifugal clutch 100b according to the third embodiment of the flange 110, the rotor 130 and the lining 150 is the same as the first embodiment described above, the description thereof will be omitted, and the drum different from the first embodiment The 180b and the pulley 190a will be briefly described.

As shown in Figure 8, the drum 180b has a fixed shaft 182 is formed in the open space on one side, the first fastening hole (1) in which the pulley 190a is fixed to the outside of the through hole 187 on the other side ( 191a) is formed.

In addition, the pulley 190a is formed with a belt groove into which the belt is fitted on the outer circumferential surface, and a second fastening hole 192a corresponding to the first fastening hole 191a of the drum 180b is formed inside the pulley 190a, The drum 180b and the pulley 190a are fastened and fixed by fastening means such as bolts.

In the third embodiment, the drum 180b and the pulley 190a are separated, and the pulley 190a is fixed to the outer periphery of the drum 180b. Will be omitted.

In the present invention as described above, the centrifugal clutch is easily assembled by inserting the spring into the inclined groove, and the spring is stretched along the inclined groove so that the expansion and contraction of the lining is made quickly, and the centrifugal clutch operation is quickly performed. By lowering the heat generated inside the centrifugal clutch by the air introduced through, there is a useful effect of discharging foreign matter, debris, etc. inside the centrifugal clutch.

In addition, the lining is formed with a semi-circular groove is rotated in close contact with the center of the fixture, which reduces the noise generated when the lining is in contact with the fixture, and also reduces the noise generated when the lining rotates as the lining rotates around the rotor. There is.

Claims (7)

Flanges fixed to the drive means, A hollow cylindrical rotor fastened to the flange and having a bearing coupled to an inner circumferential surface thereof and having a plurality of fixed bodies protruding from the outer circumferential surface thereof; A plurality of linings formed in an arc shape so as to be disposed on the outer circumferential surface between the fixing bodies of the rotor, and having inclined grooves inclined toward both centers on both sides thereof so as to be fitted with springs, and semicircular grooves contacting the fixing bodies at both ends; Centrifugal clutch comprising a drum coupled to the rotor via the bearing on a fixed shaft protruding toward the center of the open one side and the inner circumferential surface is in contact or non-contact with the drum is intermittent rotation. delete The method of claim 1, A semicircular groove is formed at both ends of the lining so as to be in close contact with a fixed body having a circular cross section, and one side of the semicircular groove has a hemispherical groove having a hemispherical shape. The method of claim 1, Centrifugal clutch, characterized in that the fixing plate for fixing the bearing position is fixed to the end of the fixed shaft inserted into the bearing by the fastening means. The method according to claim 1 or 3 or 4, The drum is a centrifugal clutch, characterized in that the pulley is integrally formed on the outer peripheral surface. The method of claim 5, The flange and the drum is a centrifugal clutch characterized in that the through-holes for discharging foreign matter, such as sand, dust due to the inflow of external air is formed. The method according to claim 1 or 3 or 4, The drum has a first fastening hole is formed so that the pulley formed with a belt groove on the outer circumferential surface, and the second fastening hole corresponding to the first fastening hole is formed inside the pulley.

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