KR20110018805A - Centrifugal clutch - Google Patents

Centrifugal clutch Download PDF

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Publication number
KR20110018805A
KR20110018805A KR1020090076962A KR20090076962A KR20110018805A KR 20110018805 A KR20110018805 A KR 20110018805A KR 1020090076962 A KR1020090076962 A KR 1020090076962A KR 20090076962 A KR20090076962 A KR 20090076962A KR 20110018805 A KR20110018805 A KR 20110018805A
Authority
KR
South Korea
Prior art keywords
centrifugal
clutch drum
input shaft
clutch
centrifugal weight
Prior art date
Application number
KR1020090076962A
Other languages
Korean (ko)
Inventor
이광섭
Original Assignee
이광섭
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이광섭 filed Critical 이광섭
Priority to KR1020090076962A priority Critical patent/KR20110018805A/en
Publication of KR20110018805A publication Critical patent/KR20110018805A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/14—Friction clutches with outwardly-movable clutching members co-operating with the inner surface of a drum or the like
    • F16D13/18—Friction clutches with outwardly-movable clutching members co-operating with the inner surface of a drum or the like shaped as linked or separately-pivoted segments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D43/00—Automatic clutches
    • F16D43/02—Automatic clutches actuated entirely mechanically
    • F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
    • F16D43/14—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members
    • F16D43/18—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members with friction clutching members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D43/00—Automatic clutches
    • F16D43/02—Automatic clutches actuated entirely mechanically
    • F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
    • F16D43/14—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members
    • F16D2043/145—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members the centrifugal masses being pivoting

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)

Abstract

PURPOSE: A centrifugal clutch is provided to transfer the torque of an input shaft to a clutch drum and to prevent the torque of the clutch drum from being transferred to the input shaft. CONSTITUTION: A centrifugal clutch comprises a hub(20), two or more centrifugal weights(30), a lining(40), return springs(50), a clutch drum(60), arms(70), and a frictional force reducing unit(90). The hub is fixed to an input shaft(10). The centrifugal weights are moved to the edge of the centrifugal clutch when the input shaft is excessively rotated. The lining is installed in the outer side of the centrifugal weights. The return springs pull the centrifugal weights to the center of the hub. Power is output to the clutch drum. One side of the arms is fixed to the hub, and the other sides are fixed to the centrifugal weights. The frictional force reducing unit is installed on one surface of the outer side of the centrifugal weights.

Description

Centrifugal clutch

1a to 1c is an embodiment of a conventional centrifugal clutch

Figure 2a to 2c is another embodiment of the conventional centrifugal clutch

Figure 3a to 3c is an embodiment of the centrifugal clutch of the present invention

Figure 4 is another embodiment of the centrifugal clutch of the present invention

Description of the Related Art

1: input shaft 2: hub 3: centrifugal weight

3a: wing centrifugal 4: lining 5: return spring

6: clutch drum 7: guide pin 8: holding pin

10 input shaft 20 hub 30 centrifugal weight

40: lining 50: return spring 60: clutch drum

70: arm 80: fixing means 90: frictional force relaxing means

Forward: Forward Rotation Backward: Reverse Rotation

The present invention relates to a centrifugal clutch in which the clutch drum rotates while the centrifugal weight moves to the edge when the input shaft rotates above a certain speed.

1 to 2, the conventional centrifugal clutch is described as follows. 1A-1B show representative conventional centrifugal clutches. Figure 1a is a centrifugal clutch that can transfer the forward and reverse rotational power of the input shaft to the clutch drum. When the input shaft 1 rotates more than a certain speed in a specific direction (forward rotation or reverse rotation), the centrifugal weight 3 installed on the hub 2 moves to the edge, and at the same time, the lining provided on the outer circumferential surface of the centrifugal weight The clutch drum rotates while (4) and clutch drum 6 come into contact.

In FIG. 1A, when the rotation speed of the clutch drum is greater than the rotation speed of the input shaft, the rotation force of the clutch drum may be transmitted to the input shaft while maintaining the friction force between the lining and the clutch drum.

Figure 1b is generally a centrifugal clutch that can transmit the one-way rotational force of the input shaft to the clutch drum. In FIG. 1A, the centrifugal weight 3 is configured symmetrically with respect to the guide pin 7 so that "centrifugal force generated at the forward rotation of the input shaft" and "centrifugal force generated at the reverse rotation of the input shaft" are the same. However, in FIG. 2, the wing-shaped centrifugal weight 3a is configured asymmetrically about the fixed pin 8 so that there is a large difference between the "centrifugal force generated at the forward rotation of the input shaft" and the "centrifugal force generated at the reverse rotation of the input shaft". have. Looking at the power transmission process based on Figure 1b as follows.

In FIG. 1B, when the input shaft 1 rotates at a constant speed or more in the forward rotation direction, the vane centrifugal weight 3 installed at the hub 2 moves to the edge, and the lining 4 and the clutch drum 6 are moved. The clutch drum rotates at the same time. However, in the case where the input shaft 1 rotates in reverse, the vane centrifugal weight 3 requires a much higher speed than the speed of the forward rotation in order to move to the edge. Therefore, when the input shaft rotates in reverse, the reverse rotational power of the input shaft is hardly transmitted to the clutch drum.

In FIG. 1B, when the clutch drum rotates more than the swing power of the input shaft, the clutch drum pushes the vane centrifugal weight, and thus the rotational force of the clutch drum is hardly transmitted to the input shaft. In addition, when the rotation speed of the clutch drum is greater than the rotation power of the input shaft, the contact between the lining and the clutch drum wears because the clutch drum rotates forward rapidly while the lining and the clutch drum contact each other.

Figure 2a to 2c is another embodiment of the conventional centrifugal clutch has a feature that the centrifugal weight is fixed to the arm fixed to the hub. Figure 2a is a state in which the centrifugal clutch is not operating, Figure 2b shows a state in which the centrifugal clutch is operating. The hub 20 is fixed on the input shaft 10, one side of the arm 70 is rotatably fixed to a part of the hub, and the centrifugal weight 30 is rotatably fixed to the other side of the arm. Centrifugal force is generated in the centrifugal weight 30 when the input shaft 10 rotates forward at a specific speed or more, and at the same time, the lining 40 and the clutch drum 60 provided on the outer portion of the centrifugal weight move to the edge of the centrifugal weight. In contact with this, the clutch drum rotates at the same time. However, when the input shaft is reversed, centrifugal force is unlikely to occur. Because of its structure, when the input shaft rotates in reverse, the centrifugal weight is pushed backward and it is difficult to generate centrifugal force. Therefore, the centrifugal clutch shown in Figs. 2A and 2C is used to transfer the turning power of the input shaft to the clutch drum.

Figure 2c shows a case in which the rotation speed of the clutch drum is faster than the rotation speed of the input shaft. In this case, while the clutch drum 60 pushes the centrifugal weight 30, the centrifugal weight fixed to the fixing means 80 rotates within a predetermined angle, and one side of the lining contacts the clutch drum. Therefore, the turning power of the clutch drum is hardly transmitted to the input shaft. However, since one side of the lining and the clutch drum is in contact with the clutch drum quickly rotates forward, the contact portion between the lining and the clutch drum is worn.

The present invention is to make a centrifugal clutch that can transmit the rotational force of the input shaft to the clutch drum, and at the same time the rotational force of the clutch drum is not transmitted to the input shaft when the rotational speed of the clutch drum is faster than the rotational speed of the input shaft.

Conventional centrifugal clutches generally use one-way clutch bearings to prevent the rotational force of the clutch drum from being transmitted to the input shaft when the rotational speed of the clutch drum is faster than that of the input shaft. The one-way clutch bearing is installed at the contact portion between the input shaft and the centrifugal clutch to transmit the rotational force of the input shaft to the clutch drum, and the one-way clutch bearing does not operate when the rotation speed of the clutch drum is faster than the rotational speed of the input shaft. The rotational force of the drum is not transmitted to the input shaft. However, incorporating one-way clutch bearings into centrifugal clutches creates serious durability problems. It causes a big impact on the one-way clutch bearings at the moment the centrifugal clutch is operated, which can damage the bearings. One-way clutch bearings can be worn or deformed in the structure and the contact portion of the bearings at the moment when the one-way clutch operates. In this regard, one-way clutch bearings are difficult to use in devices that suddenly transmit large amounts of power. In addition, the one-way clutch bearing has a problem in that power can be transmitted only in the forward direction (one direction), and power is hardly transmitted in the reverse direction.

In order to solve the above problems, the present invention uses a method of installing a frictional force relaxation means on one side of the outer portion of the centrifugal clutch in the centrifugal clutch that fixes the centrifugal weight to the hub by the arm.

Referring to the centrifugal clutch of the present invention in detail with reference to Figures 3a to 3c as follows. Figure 3a is a state in which the centrifugal clutch is not operating, Figure 3b is a state in which the centrifugal clutch is operating, Figure 3c shows a case in which the rotation speed of the clutch drum is faster than the rotation speed of the input shaft. In the specification of the present invention, the position of the centrifugal weight (left or right) is described with reference to the hub position where the arm is fixed.

The main part of the present invention is a hub 20 which is fixed on the input shaft 10; two or more centrifugal weights 30 moving to the edge by centrifugal force when the input shaft is rotated by a specific speed or more; Lining (40) is provided on the outer portion of; the return spring (50) for pulling the centrifugal weight to the center of the hub; clutch drum 60 for outputting power; one side is fixed to the hub (20), the other side is centrifugal An arm 70 fixed to the weight 30 to connect the hub with the centrifugal weight; and frictional force alleviating means 90 " installed on one side of the outer portion of the centrifugal weight. The hub 20 is fixed on the input shaft 10 to which power is input, and two or more centrifugal weights 30 are installed on the hub. Here the hub and centrifugal weight are connected to the arm 70. Lining 40 is provided on the outer portion of the centrifugal weight, frictional force alleviating means 90 is provided on one side of the outer portion of the centrifugal weight to relieve friction. Then connect the hub and centrifugal weight with the return spring (50). The return string pulls the centrifugal weight into the hub of the hub. A circular clutch drum 60 is installed at the outer portion of the lining of the centrifugal weight, and the centrifugal weight and the clutch drum contact when the centrifugal weight moves outward.

The operation of the centrifugal clutch on the basis of Figures 3a to 3b is as follows. Centrifugal force is generated in the centrifugal weight 30 when the input shaft 10 rotates forward at a specific speed or more, and at the same time, the lining 40 and the clutch drum 60 provided on the outer circumferential surface of the centrifugal weight are moved to the outside of the centrifugal weight. In contact with this, the clutch drum rotates at the same time. Through this process, the rotational force of the input shaft is transmitted to the clutch drum. However, when the input shaft is reversed, centrifugal force is unlikely to occur. Because of its structure, when the input shaft rotates in reverse, the centrifugal weight is pushed backward and it is difficult to generate centrifugal force.

3C illustrates a case in which the forward speed of the clutch drum is faster than the forward speed of the input shaft. As the clutch drum 60 pushes the centrifugal weight 30, the centrifugal weight fixed to the fixing means 80 rotates within a predetermined angle, and the frictional force relaxing means 90 and the clutch on one side of the outer portion of the centrifugal weight The drum is in contact. Therefore, the rotational force of the clutch drum is not transmitted to the input shaft. Here, the frictional force alleviating means 90 refers to a device for alleviating the frictional force between the clutch drum and the centrifugal weight (lining). The friction force alleviating means may simply install a material that can alleviate the friction on one side of the outer portion of the centrifugal weight. One ball or roller may be installed on one side of the outer portion of the centrifugal weight as another frictional relieving means, and other methods are possible.

4 shows a case where the forward power and the reverse power of the input shaft can be transmitted to the clutch drum. In FIG. 4, the main part is similar to FIGS. 3A to 3C, which includes "a hub 20 fixed on the input shaft 10; two or more centrifugal weights moving to the edge by centrifugal force when the input shaft rotates at a specific speed or more. (30); lining (40) provided on the outer portion of the centrifugal weight; return spring (50) for pulling the centrifugal weight to the center of the hub; clutch drum (60) through which power is output; one side to the hub (20) Fixed, the other side is fixed to the centrifugal weight 30, the arm 70 for connecting the hub and centrifugal weight; frictional force relaxation means (90) provided on one side of the outer portion of the centrifugal weight " . However, 1/2 (number) of the arms 70 is inclined in the forward direction, so that 1/2 (number) of the centrifugal weights is installed on the right side of the arm, and the other 1/2 (number) of the arms is inclined in the reverse direction and thus centrifugal weights. 1/2 of the number is installed on the left side of the arm. According to this structure, centrifugal force is generated in the centrifugal weight on the right side of the arm when the input shaft is rotated forward, and centrifugal force is generated in the centrifugal weight on the left side of the arm when the input shaft is rotated in the reverse direction. Looking at the operation of the centrifugal clutch on the basis of Figure 4 as follows.

In FIG. 4, when the input shaft rotates forward at a specific speed or more, centrifugal force is generated at the centrifugal weight A and the centrifugal weight D, and at the same time, the centrifugal weight A and the centrifugal weight D move outwards. Then, the clutch drum rotates forward while the lining 40 provided on the outer circumferential surfaces of the centrifugal weight A and the centrifugal weight D contacts the clutch drum 60.

In FIG. 4, when the forward speed of the clutch drum is faster than the forward speed of the input shaft, the clutch drum rotates the centrifugal weight within a predetermined angle while pushing the centrifugal weight A and the centrifugal weight D. The friction force relaxing means 90 on one side and the clutch drum contact. Therefore, the turning power of the clutch drum is not transmitted to the input shaft.

In FIG. 4, when the input shaft is rotated back at a specific speed or more, centrifugal force is generated at the centrifugal weight B and the centrifugal weight C, and at the same time, the centrifugal weight B and the centrifugal weight C move to the edges. Then, the clutch drum reverses while the lining and the clutch drum provided on the outer circumferential surfaces of the centrifugal weight B and the centrifugal weight C come into contact with each other.

In FIG. 4, when the reverse rotation speed of the clutch drum is faster than the reverse rotation speed of the input shaft, the clutch drum rotates the centrifugal weight within a predetermined angle while pushing the centrifugal weight B and the centrifugal weight C. The friction force relaxing means 90 on one side and the clutch drum contact. Therefore, the reverse rotational power of the clutch drum is not transmitted to the input shaft.

The present invention provides a centrifugal clutch in which the rotational force of the input shaft is transmitted to the clutch drum and the rotational force of the clutch drum is not transmitted to the input shaft. Such a centrifugal clutch may replace a centrifugal clutch combined with a conventional one-way clutch. In general, the centrifugal clutch using a one-way clutch is difficult to withstand the shifting shock generated at the moment of operation of the centrifugal clutch, and the centrifugal clutch of the present invention can withstand the shifting shock with a smooth power transmission without using the one-way clutch bearing. And the centrifugal clutch of the present invention can be very useful for a multistage transmission using a plurality of centrifugal clutch. Multi-speed gearbox using a number of centrifugal clutch is difficult to use one-way clutch bearing because of the large shift shock at the moment of operation of the centrifugal clutch. The centrifugal clutch of the present invention is a power transmission device that does not use a one-way clutch bearing, and can sufficiently withstand a shift shock.

Claims (3)

The present invention, the main portion "hub 20 is fixed on the input shaft 10; two or more centrifugal weights (30) to move to the edge by the centrifugal force when the input shaft is rotated more than a specific speed; the centrifugal weight Lining (40) is provided on the outer portion of; the return spring (50) for pulling the centrifugal weight to the center of the hub; clutch drum 60 for outputting power; one side is fixed to the hub (20), the other side is centrifugal An arm 70 fixed to the weight 30 to connect the hub and the centrifugal weight; frictional force alleviating means 90 " installed on one side of the outer portion of the centrifugal weight; The clutch drum rotates while the lining 40 and the clutch drum 60 come into contact with the movement of the centrifugal weight when the input shaft 10 rotates above a certain speed; When the clutch drum 60 rotates in the same direction as the input shaft faster than the rotation speed of the input shaft, the frictional force relaxation means 90 provided in the centrifugal weight is in contact with the inner circumferential surface of the clutch drum, and the rotational force of the clutch drum is transmitted to the input shaft. Centrifugal clutch The arm 70 connecting the hub 20 and the centrifugal weight 30 is inclined in a forward direction, so that a centrifugal addition is installed on the right side of the arm; When the input shaft 10 rotates forward at a specific speed or more, the clutch drum rotates forward while the lining 40 and the clutch drum 60 come into contact with the movement of the centrifugal weight; When the clutch drum 60 rotates forward faster than the rotational speed of the input shaft, the frictional force relaxation means 90 provided in the centrifugal weight contacts the inner circumferential surface of the clutch drum while the forward power of the clutch drum is not transmitted to the input shaft. The method according to claim 1, 1/2 (number) of the arm 70 connecting the hub 20 and the centrifugal weight 30 is inclined in the forward direction so that 1/2 (number) of the centrifugal weight is installed on the right side of the arm, The other half (number) of the arms is inclined in the reverse direction so that one half of the centrifugal weight is installed on the left side of the arm; When the input shaft 10 rotates forward or reverse over a specific speed, the clutch drum rotates forward or reverse while the lining 40 and the clutch drum 60 come into contact with the movement of the centrifugal weight; When the clutch drum 60 rotates forward or reverse faster than the rotation speed of the input shaft, the frictional force relaxation means 90 provided in the centrifugal weight comes into contact with the inner circumferential surface of the clutch drum, and the forward or reverse rotational power of the clutch drum is input. Centrifugal clutch
KR1020090076962A 2009-08-18 2009-08-18 Centrifugal clutch KR20110018805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090076962A KR20110018805A (en) 2009-08-18 2009-08-18 Centrifugal clutch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090076962A KR20110018805A (en) 2009-08-18 2009-08-18 Centrifugal clutch

Publications (1)

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KR20110018805A true KR20110018805A (en) 2011-02-24

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Family Applications (1)

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KR1020090076962A KR20110018805A (en) 2009-08-18 2009-08-18 Centrifugal clutch

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102251685B1 (en) 2021-03-04 2021-05-13 이엠티씨 주식회사 A centrifugal clutch apparatus and transmission with the same
KR102402872B1 (en) 2021-09-29 2022-05-30 이엠티씨 주식회사 A centrifugal clutch apparatus and transmission with the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102251685B1 (en) 2021-03-04 2021-05-13 이엠티씨 주식회사 A centrifugal clutch apparatus and transmission with the same
KR102402872B1 (en) 2021-09-29 2022-05-30 이엠티씨 주식회사 A centrifugal clutch apparatus and transmission with the same

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