JP3992590B2 - Clutch device with brake - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a brake used for a power transmission mechanism of a prime mover or a rotary shaft torque such as an agricultural machine, a construction machine, a light vehicle, a small ship, a pump, a wind-powered product, a compressor, an engine, an electric motor, a reduction gear, a transmission, and the like The present invention relates to a clutch device.
[0002]
[Prior art]
Conventionally, as a clutch device with a brake of this type, as described in Patent Document 1 described below, a clutch device includes a rotary drive shaft connected to a prime mover and a driven shaft having a cutting blade attached to the tip. What is connected via is known. In this clutch device with a brake, the clutch device is intermittently connected by a centrifugal force from a rotary drive shaft operated by an accelerator lever, and further, the driven shaft is braked by operation of the brake lever. In order to avoid danger, such as agricultural equipment provided with such a clutch device with a brake, the rotation of the cutting blade is stopped by loosening the accelerator lever and operating the brake lever by hand.
However, since this type of clutch device with a brake requires a brake lever, a wire, and a structure for passing this wire through the device, there is a problem that the number of parts increases and the configuration becomes complicated.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-14225
Therefore, a clutch device with a brake that can perform a clutch operation and a brake operation only by operating an accelerator lever is disclosed in Patent Document 2 below. A clutch device 51 with a brake described in Patent Document 2 is shown in FIG. In the clutch device 51 with a brake, a driven shaft 60 is rotatably supported via a bearing 58 in a brake drum 56 integral with a housing 59, and a clutch drum 55 is attached to the tip of the driven shaft 60. Yes. A brake shoe 57 is attached to the outer surface of the clutch drum 55 so as to freely swing, and is in sliding contact with the outer peripheral surface of the brake drum 56 so as to be freely separated. The brake shoe 57 is pressed against the outer peripheral surface of the brake drum 56 by an urging force of an elastic member (not shown), but the pressing force decreases as the rotational speed of the clutch drum 55 increases. Inside the clutch drum 55, a clutch shoe 54 that is slidably in contact with the inner peripheral surface of the clutch drum 55 is disposed. The clutch shoe 54 is swingably attached to a holder 53 connected to a rotation drive shaft 52 that is an engine crankshaft.
[0005]
[Patent Document 2]
Japanese Patent Laid-Open No. 2002-176822 [0006]
In the clutch device with brake 51, when the engine output is increased, the rotational speed of the holder 53 increases and reaches a certain rotational speed R1. Then, the clutch shoe 54 comes into sliding contact with the inner peripheral surface of the clutch drum 55 by centrifugal force, and the transmission torque applied to the driven shaft 60 increases as shown by the clutch characteristic indicated by the solid line P1 in FIG. On the other hand, when the rotational speed of the clutch drum 55 increases, the braking torque of the brake shoe 57 decreases as shown by the dashed line Q1. On the other hand, when braking, the accelerator is loosened to reduce the rotational speed of the holder 53. Then, the transmission torque to the driven shaft 60 decreases as shown by the solid line P1. At this time, the braking torque from the brake shoe 57 is applied to the driven shaft 60 as indicated by a one-dot chain line Q1. When the rotational speed of the rotary drive shaft 52 falls below the rotational speed R1, the clutch is released and only braking by the brake is performed.
[0007]
[Problems to be solved by the invention]
By the way, in the above-mentioned clutch device 51 with a brake, there exists a region V where both the brake braking operation (one-dot chain line Q1) and the clutch transmission operation (solid line P1) work simultaneously. For this reason, when the clutch is connected, the acceleration of the driven shaft is delayed due to the sliding of the brake, and the working efficiency may be lowered, and the fuel is also wasted. On the other hand, at the time of brake braking, the braking of the driven shaft is hindered by the sliding of the clutch, so that, for example, the cutting blade cannot be stopped quickly, which may lead to danger. Moreover, it was also a cause of increasing wear of the clutch shoe and the brake shoe.
Such various problems similarly occur when the brake is manually operated during clutch transmission in the apparatus disclosed in Patent Document 1 described above.
[0008]
The present invention has been made in view of the above-described conventional problems. The clutch transmission operation and the brake braking operation can be easily switched only by the output operation of the prime mover. It is an object of the present invention to provide a clutch device with a brake that does not resist the operation of the brake.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a clutch device with a brake according to the present invention includes a rotary drive shaft that is drivingly connected to a prime mover and rotates within the housing, and a free rotation of the lid portion of the housing in a coaxial arrangement with the rotary drive shaft. A driven shaft supported on the driven shaft, a driven disk disposed in the housing and attached to the driven shaft, a clutch disk portion facing one side of the driven disk, and the rotational drive shaft in the axial direction of the rotational drive shaft A clutch unit that is freely slidable on the shaft, a drive mechanism that is provided on the rotary drive shaft and moves the clutch unit toward the driven disc by centrifugal force generated by the rotation of the rotary drive shaft, and the other side surface of the driven disc. A brake unit having a brake disk portion that is slidable in the axial direction of the rotational drive shaft on the inner surface of the housing, and a housing And an elastic member that urges the brake unit toward the driven disk, and a ring member that is mounted on the outer peripheral surface of the clutch unit so as to be freely rotatable about the rotational drive shaft and that engages with the brake unit. When the rotational speed of the rotary drive shaft exceeds the first predetermined rotational speed, the drive mechanism moves the clutch unit to press the clutch disk portion against one side of the driven disk, and the ring member associated with the clutch unit moves the brake unit. When the brake disk part is moved away from the other side of the driven disk and the rotational speed of the rotary drive shaft falls below a second predetermined rotational speed smaller than the first predetermined rotational speed, the elastic member pushes the brake unit. The brake disc is pressed against the other side of the driven disc and the ring member associated with the brake unit is The clutch unit is moved away from one side surface of the driven disk, and when the rotational speed of the rotary drive shaft is between the first predetermined rotational speed and the second predetermined rotational speed, the clutch unit clutch Both the disc portion and the brake disc portion of the brake unit are configured so as to be separated from the driven disc.
[0010]
Further, the clutch unit in the above configuration is configured to be separated and independent into a moving unit provided on the rotary drive shaft so as to be freely slidable in the axial direction of the rotary drive shaft, and a clutch disc portion facing one side surface of the driven disc. The moving unit and the clutch disk part are connected via a one-way mechanism that allows a rotational force from the moving unit to the clutch disk part only in one rotational direction of the moving unit.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side sectional view of a clutch device with a brake according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the clutch device with a brake.
In each figure, the clutch device with a brake 1 according to the present embodiment is configured around a rotary drive shaft 2 that rotates within a housing 6 formed in a substantially cylindrical shape. The rotary drive shaft 2 is drivingly connected to a prime mover (such as an engine or a motor) (not shown). The driven side opening of the housing 6 is sealed with a lid 13. A driven shaft 15 is pivotally supported by the lid portion 13 via a bearing 26 in the arrangement of the rotational drive shaft 2 and the coaxial center O. A flat plate-like driven disk 16 is attached to an end of the driven shaft 15 in the housing 6.
[0012]
On the drive side of the rotary drive shaft 2, a side plate 3 having six plate pieces arranged radially is fixed. Each of the six plate pieces is bent toward the lid portion 13. A guide groove A parallel to the axis O direction (hereinafter referred to as the thrust direction) is formed on the outer peripheral surface of the rotary drive shaft 2 near the driven side. Next to the driven side of the side plate 3 in the rotational drive shaft 2, a slide pulley 5 having six guide grooves B in a radial arrangement is attached to the rotational drive shaft 2. Roller-like weights 4 are accommodated in the respective guide grooves B so that they are not dropped from the respective guide grooves B due to the presence of the plate pieces of the side plate 3. Each guide groove B has an inclined surface that approaches the drive side as it goes radially outward, and each weight 4 rolls on these inclined surfaces. The slide pulley 5 is formed with a guide groove J parallel to the thrust direction on its inner peripheral surface, and the guide groove J is slidably fitted to the guide groove A of the rotary drive shaft 2 so that the slide pulley 5 rotates. It is free to move in the thrust direction with respect to the drive shaft 2.
[0013]
The driven side surface of the slide pulley 5 is in contact with the moving unit 18 fitted to the rotary drive shaft 2 so as to be slidable in the thrust direction. A guide groove I parallel to the thrust direction is formed on the inner peripheral surface of the moving unit 18, and this guide groove I is slidably fitted to the guide groove A of the rotary drive shaft 2, so that the moving unit 18 rotates. It is free to move in the thrust direction with respect to the drive shaft 2.
The clutch unit 34 mainly includes a clutch disk base 33 having the clutch disk portion 10 facing one side of the driven disk 16, the moving unit 18 independent of the clutch disk base 33, and a one-way mechanism 32 described later. It is configured.
The drive mechanism 31 includes a side plate 3, a slide pulley 5, a guide groove B of the slide pulley 5, and a weight 4, and directs the clutch unit 34 toward the driven disk 16 by centrifugal force due to the rotation of the rotary drive shaft 2. To move.
[0014]
The brake unit 35 is formed in the shape of a bottomed cup, and the bottom of the brake unit 35 is a brake disc portion 8 that faces the other side surface of the driven disc 16. The guide groove E formed on the outer peripheral surface of the brake unit 35 in parallel with the thrust direction is slidably fitted to the guide groove H similarly formed in parallel with the thrust direction on the inner surface of the housing 6 to the housing 6. The brake unit 35 can be moved in the thrust direction. One end of an elastic member 12 made of a coil spring or the like is held in a hole formed in the inner surface of the lid portion 13. The other end of the elastic member 12 is in contact with the driven surface of the brake disk portion 8. By this elastic member 12, the brake unit 35 is biased toward the driven disk 16.
[0015]
On the outer peripheral surface of the clutch disc base 33 of the clutch unit 34, the ring member 7 is mounted so as to be freely rotatable around the axis O through a bearing 21. The driving side end portion of the ring member 7 is formed as a large diameter portion 7A having a larger diameter than the driven side body portion. The driven side portion of the ring member 7 is slidably mounted on the inner peripheral surface of the brake unit 35. When the ring member 7 is inserted toward the driven side in the brake unit 35, the step portion G that is the boundary between the body portion of the ring member 7 and the large diameter portion 7 a comes into contact with the end surface portion F of the brake unit 35. It is like that.
[0016]
The moving unit 18 and the clutch disk base 33 transmit a rotational force from the moving unit 18 connected to the rotational drive shaft 2 to the clutch disk base 33 in one rotational direction of the moving unit 18 (in the direction of arrow R in FIG. 3). It is connected via a one-way mechanism 32 that allows only for the above.
As shown in FIG. 3, the one-way mechanism 32 includes four locking grooves C formed on the outer peripheral surface of the moving unit 18, four inner peripheral grooves D formed on the inner peripheral surface of the clutch disk base 33, and It is comprised from the parallel pin 19 accommodated in the space enclosed by each locking groove C and each inner peripheral groove | channel D. Each locking groove C is formed in a semicircular shape when viewed from the side, and the inner circumferential groove D has a shape in which the distance from the outer circumferential surface of the moving unit 18 becomes narrower as the rotational driving shaft 2 moves in the rotational driving direction (arrow R direction). Is formed.
[0017]
In the figure, reference numeral 20 denotes a C-type retaining ring for a shaft for holding the bearing 21 mounted between the inner peripheral surface of the ring member 7 and the outer peripheral surface of the clutch disc base 33, and 28 denotes a one-way mechanism. 32 is a ring plate for preventing the parallel pins 19 from coming off, 22 is a hexagon socket head cap screw for fixing the cap washer 17 to the driven side end of the rotary drive shaft 2, and 14 is connected to the moving unit 18 at the other end. The center spring 23 is fitted between the inner peripheral surface of the shaft hole of the lid portion 13 and the outer peripheral surface of the driven shaft 15. A hole C-shaped retaining ring 25 for holding the bearing 26 is a hexagon socket head cap screw for fixing the lid portion 13 to the housing 6.
[0018]
The clutch device with brake 1 of the present embodiment is configured as described above.
While the rotary drive shaft 2 is stopped, as shown in FIG. 1, the clutch unit 34 and the slide pulley 5 of the drive mechanism 31 are moved by the urging force (force in the direction of arrow K in FIG. 1) of the center spring 14 which is an elastic member. The clutch disk portion 10 is located at the position closest to the side plate 3 and is separated from the driven disk 16, and the transmission force is cut off. Further, the facing 9 of the brake disk portion 8 is pressed against the other side of the driven disk 16 by the urging force of the elastic member 12, and the driven shaft 15 is stopped. The end surface portion F of the brake unit 35 is separated from the step portion G of the ring member 7.
[0019]
Therefore, when the rotary drive shaft 2 starts to rotate by starting the motor (engine) (not shown), the moving unit 18 rotates in the direction of arrow R as shown in FIG. The 32 parallel pins 19 move in the inner circumferential groove D to the downstream side in the rotation direction and are fitted into the locking grooves C. As a result, the rotational driving force from the rotational driving shaft 2 is transmitted to the clutch disk base 33. Then, a centrifugal force outward in the radial direction of the side plate 3 according to the rotational speed of the rotational drive shaft 2 is applied to the weight 4. Subsequently, when the rotational speed of the rotary drive shaft 2 increases and the thrust direction component of the centrifugal force at that time exceeds the urging force of the center spring 14, the drive mechanism 31 directs the clutch unit 34 toward the driven disk 16 (FIG. 5) Start to push. As the rotational speed of the rotary drive shaft 2 gradually increases, the weight 4 of the drive mechanism 31 moves radially outward in the guide groove B. As a result, the slide pulley 5, the clutch unit 34, the bearing 21, and the ring member 7 are integrally moved toward the driven disk 16.
[0020]
At this time, the facing 9 of the brake disk 8 remains in sliding contact with the other side surface of the driven disk 16, and the braking action is acting on the driven shaft 15. Among them, the stepped portion G of the large-diameter portion 7 A of the ring member 7 that accompanies the clutch unit 34 via the bearing 21 contacts the end surface portion F of the brake unit 35. Further, when the centrifugal force increases and the thrust force in the thrust direction to the brake unit 35 exceeds the urging force of the elastic member 12, the clutch unit 34 pushes the brake unit 35 toward the lid portion 13. Then, as shown in FIG. 4, when the rotational speed of the rotary drive shaft 2 reaches the second predetermined rotational speed S, the facing 9 of the brake disk portion 8 moves away from the other side surface of the driven disk 16. At this time, as shown in FIG. 5, the facing 11 of the clutch disk portion 10 is not in contact with one side surface of the driven disk 16. That is, the clutch device with a brake 1 in this state is in the neutral region T (FIG. 4) in which both the facing 11 of the clutch disc portion 10 and the facing 9 of the brake disc portion 8 are separated from the driven disc 16.
When the rotational speed of the rotary drive shaft 2 exceeds the first predetermined rotational speed U, the drive mechanism 31 moves the clutch unit 34, the bearing 21, the ring member 7, and the brake unit 35 to the arrow Ka as shown in FIG. Further, the facing 11 of the clutch disk portion 10 is pressed against one side of the driven disk 16 to be frictionally engaged. As a result, a transmission torque such as a clutch characteristic indicated by a solid line P in FIG. 4 is transmitted from the rotary drive shaft 2 to the driven shaft 15.
[0021]
On the other hand, when the accelerator is loosened to reduce or stop the output of the prime mover, the rotational speed of the rotary drive shaft 2 falls below the first predetermined rotational speed U, and the ring member 7 and the center spring 14 associated with the brake unit 35 are connected to the clutch unit. 34 is moved in the direction of the arrow K to separate the clutch disk 10 from one side of the driven disk 16. As a result, the neutral region T is entered, and both the facing 11 of the clutch disc portion 10 and the facing 9 of the brake disc portion 8 return to a state where they are separated from the driven disc 16. Then, when the rotational speed of the rotary drive shaft 2 falls below the second predetermined rotational speed S, the elastic member 12 pushes the brake unit 35 and causes the facing 9 of the brake disk portion 8 to move to the other side of the driven disk 16. The brake function works when pressed against.
[0022]
As described above, the brake-equipped clutch device 1 according to this embodiment can automatically switch the driving force of the prime mover between the brake operation and the clutch operation only by an accelerator operation, for example. Therefore, it is not necessary to provide a brake lever or a brake wire as in the device disclosed in Patent Document 1, and naturally there is no need to operate the brake lever, and the operability is good. Even when the accelerator is released unexpectedly, the brake unit 35 automatically brakes the driven shaft 15, which is safe.
Moreover, since the neutral region T is provided between the brake braking operation and the clutch transmission operation, there is no state in which both the brake braking operation and the clutch transmission operation work simultaneously as in the devices disclosed in Patent Document 1 and Patent Document 2. . As a result, the driven shaft 15 can be stopped quickly and contributes to safety without causing problems such as wasteful energy consumption due to brake sliding when the clutch is connected and braking inhibition due to clutch sliding when braking. Moreover, the effect which suppresses abrasion of a clutch facing and a brake facing is also acquired.
[0023]
On the other hand, when braking the driven shaft 15, even if the accelerator is loosened to reduce the rotational speed of the rotary drive shaft 2, the inertial force applied to the driven shaft 5 as it is tries to maintain the rotational speed of the rotary drive shaft 2.
However, the clutch device 1 with a brake is provided with a one-way mechanism 32 between the slide boss 18 and the clutch disk base 33, and therefore, as shown in FIG. 3 (a), from the rotary drive shaft 2 side to the driven shaft 15 side. Rotational driving force can only be transmitted in one direction (arrow R direction). Therefore, at the time of braking, as shown in FIG. 3B, there is a difference between the rotational speeds of the moving unit 18 and the clutch disc base 33. The driven shaft 15 side (clutch disc base 33) tries to rotate as it is by the inertial force, but the transmission of the inertial force to the rotational drive shaft 2 side (moving unit 18) is cut off by the one-way mechanism 32. In FIG. 3B, the moving unit 18 is rotated in the direction opposite to the arrow R (in the direction of arrow Ra) for easy understanding, but this indicates the relative rotation direction with respect to the clutch disk base 33. This means that the moving unit 18 is stopped or the rotational speed of the moving unit 18 is slower than that of the clutch disk base 33.
[0024]
Therefore, since the inertial force of the driven shaft 15 during braking does not affect the rotary drive shaft 2, the rotational force of the rotary drive shaft 2 is reliably suppressed following the accelerator operation. As a result, the centrifugal force of the weight 4 is reduced, so that the pressing force applied to the clutch disk portion 10 is also suppressed, and the clutch is more quickly disconnected. At the same time, since the pressing force to the brake unit 35 can be suppressed, the neutral region T becomes a short time, and the brake is effective instantly. Therefore, when applied to a brush cutter or the like, the rotary blade can be stopped instantaneously (within 2 seconds) just by releasing the accelerator, which is extremely safe.
[0025]
In the above embodiment, the brake unit 35 and the ring member 7 are configured as separate parts. As a result, when the facing 9 of the brake disc portion 8 is worn and the effectiveness of the brake is reduced, the brake disc portion 8 and the driven disc 16 are simply cut away in the direction opposite to the arrow K when the end face portion F of the brake unit 35 is shaved. Since the distance is shortened, the braking effect can be restored. However, in the present invention, it is also possible to use a member in which the ring member 7 is omitted and a bearing is press-fitted into the inner peripheral surface of the brake unit 35, or a component in which the brake unit 35 and the ring member 7 are integrally formed.
[0026]
Further, in order to arbitrarily release the braking force of the driven shaft 15, a brake releasing mechanism (not shown) that pushes the brake unit 35 to a position where the facing 9 of the brake disk portion 8 moves away from the driven disk 16 and stops at that position. Can also be provided in the housing 6. By providing such a mechanism, the stopped driven shaft 15 can be arbitrarily rotated. Thereby, for example, the cutting blade attached to the tip of the driven shaft 15 can be repaired or replaced without any trouble.
[0027]
Further, the present invention can be realized without using the center spring 14, but the presence of the center spring 14 allows the clutch to be used even in a posture other than the clutch operation, particularly when the driven shaft 15 is downward and the rotary drive shaft 2 is upward. The facing 11 of the disk unit 10 can be reliably separated from the driven disk 16.
[0028]
【The invention's effect】
As described above in detail, according to the clutch device with a brake according to the present invention, the clutch unit clutch-connects the rotational drive shaft and the driven shaft according to the output of the prime mover, and the brake unit brakes the driven shaft. Since there is a state where both the clutch disk portion of the clutch unit and the brake disk portion of the brake unit are separated from the driven disk between the clutch transmission operation and the brake braking operation, both the brake braking operation and the clutch transmission operation are performed. I don't work at the same time. As a result, when the clutch is connected, there is no wasteful energy consumption due to brake sliding, and the driven shaft is quickly accelerated. On the other hand, at the time of brake braking, there is no braking hindrance due to clutch sliding, and it is safe because the driven shaft is quickly stopped. In addition, wear of clutch facings and brake facings is also suppressed.
[0029]
Further, since the separate and independent moving unit and the clutch disk portion are connected via a one-way mechanism, the inertial force of the driven shaft during braking is not transmitted to the rotating drive shaft, so the rotational force of the rotating drive shaft is Follows the drop in output and goes down quickly. Thereby, the movement of the clutch unit and the clutch unit is accelerated, and the driven shaft can be stopped by performing the clutch disengagement and the brake braking more quickly.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a clutch device with a brake according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the clutch device with a brake.
FIGS. 3A and 3B show a one-way mechanism of the brake-equipped clutch device, wherein FIG. 3A is an explanatory view showing a state in which the one-way mechanism transmits a rotational force from a rotary drive shaft to a clutch disk base, and FIG. It is explanatory drawing which shows the state from which the rotational force from a shaft is not transmitted to the clutch disk base.
FIG. 4 is a graph showing the relationship between the engine speed and the torque applied to the driven shaft by the brake-equipped clutch device.
FIG. 5 is an explanatory diagram showing a state in which the driven disk is separated from both the brake disk part and the clutch disk part.
FIG. 6 is an explanatory diagram showing a state in which a driven disk is engaged with a clutch disk portion.
FIG. 7 is a side sectional view of a conventional clutch device with a brake.
FIG. 8 is a graph showing the relationship between engine speed and torque applied to a driven shaft by a conventional clutch device with a brake.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Clutch apparatus 2 with a brake Rotational drive shaft 3 Side plate 4 Weight 5 Slide pulley 6 Housing 7 Ring member 7A Large diameter part 8 Brake disk part 10 Clutch disk part 12 Elastic member 15 Driven shaft 16 Driven disk 18 Moving unit 19 Parallel pin 31 Drive mechanism 32 One-way mechanism 33 Clutch disc base 34 Clutch unit 35 Brake unit
A, B, E, H, I, J Guide groove
C Locking groove
D Inner circumferential groove
F end face
G step
K, R arrows
O axis
S Second predetermined speed
T neutral range
U First predetermined speed

Claims (2)

A rotary drive shaft that is drivingly connected to the prime mover and rotates within the housing, a driven shaft that is coaxially arranged with the rotary drive shaft and pivotally supported on the lid portion of the housing, and a driven shaft that is disposed within the housing and is supported by the driven shaft. A clutch unit having an attached driven disk, a clutch disk portion facing one side of the driven disk, and being freely slidable in the direction of the rotation drive shaft; and a rotation drive shaft. A drive mechanism for moving the clutch unit toward the driven disk by the centrifugal force generated by the rotation of the rotary drive shaft, a brake disk portion facing the other side of the driven disk, and sliding on the inner surface of the housing in the direction of the axis of the rotary drive shaft. A brake unit that is freely movable, and an elastic member that is disposed in the housing and biases the brake unit toward the driven disk; And a ring member for engagement with the brake unit while being freely pivoted to a rotary drive shaft axis around mounted on the outer peripheral surface of the clutch unit,
When the rotational speed of the rotary drive shaft exceeds the first predetermined rotational speed, the drive mechanism moves the clutch unit to press the clutch disk portion against one side of the driven disk and the ring member associated with the clutch unit moves the brake unit. When the brake disk portion is separated from the other side surface of the driven disk and the rotational speed of the rotary drive shaft falls below a second predetermined rotational speed smaller than the first predetermined rotational speed, the elastic member pushes the brake unit. The brake disc portion is pressed against the other side of the driven disc, and a ring member associated with the brake unit moves the clutch unit to separate the clutch disc portion from one side of the driven disc, and the rotational speed of the rotary drive shaft is When it is between the predetermined rotational speed and the second predetermined rotational speed, the clutch disk of the clutch unit And brake with the clutch apparatus both of the brake disc of the brake unit is characterized by being configured as away from the driven disc. The clutch unit is configured to be separated and independent into a moving unit provided on the rotating drive shaft so as to be slidable in the axial direction of the rotating drive shaft, and a clutch disk portion facing one side surface of the driven disk. The clutch device with a brake according to claim 1, wherein the clutch disk portion is connected via a one-way mechanism that allows a rotational force from the moving unit to the clutch disk portion only in one rotational direction of the moving unit.

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