JPS6116426Y2 - - Google Patents

Description

[Detailed description of the invention] This invention transmits the rotational torque of the input shaft to the output side via the clutch mechanism, and stops the rotation of the output side by the brake mechanism the moment the torque transmission is interrupted. This clutch/brake device is particularly attached to a power lawn mower and uses a brake to instantly stop a mowing blade driven by an engine via a clutch mechanism when the clutch is disengaged.

For example, when moving a power lawn mower to change the lawn mowing location, it is necessary to stop the rotation of the cutting blade for safety reasons. In this case, it is possible to stop the rotation of the cutting blade by stopping the rotation of the engine that is the driving source, but if the cutting blade is to be used continuously, it is necessary to restart the engine. For this reason, it is desirable to stop the rotation of the cutting blade without stopping the engine.

Therefore, as shown in U.S. Patent No. 3,871,159, some front-push type power lawn mowers are equipped with a clutch/brake device under the engine to stop the rotation of the cutting blades without stopping the engine. . In this device, a clutch disk is fixed to an input shaft arranged vertically in a housing, an output shaft with a cutting blade attached is arranged concentrically with the input shaft, and a disk-like disk that can be engaged with the clutch disk is installed. A torque transmitting member and a brake disc capable of engaging with a brake torque receiving portion fixed to the inner bottom surface of the housing are provided on the output shaft so as to be integrally movable in the axial direction thereof, and are rotatably provided on the housing. When an operating lever serving as an operating mechanism is engaged with an operating fulcrum formed between a torque transmitting member and a brake disc, the torque transmitting member and brake disc are operated with the operating lever, and the lever is pulled to operate the operating mechanism. The brake disc separates from the brake torque receiver, and then the torque transmitting member engages with the clutch disc, and the rotation of the input shaft is transmitted to the output shaft, allowing the cutting blade to rotate. When the lever is released, the operating rod moves in the opposite direction. The torque transmitting member separates from the clutch disk by rotating in the direction, and then the brake disk engages with the brake torque receiving portion to stop the rotation of the output shaft.

However, since this device does not have a clutch spring that presses the torque transmission member against the clutch disk, the clutch connection lacks stability because it relies on the operator's grip force on the operating member. In addition, if a stone or the like hits the cutting blade installed on the output shaft, a momentary overload will be transmitted from the output shaft to the clutch disc via the torque transmission member, and if the operator continues to hold the operating member, If the clutch remains connected, overload may cause the engine to stop or equipment to be damaged. Further, in order to prevent dust from entering between the torque transmitting member and the clutch disk, a fixed housing is provided to cover the entire device. Furthermore, since the operating fulcrum of the operating mechanism is provided between the torque transmitting member and the brake disc, this member must be manufactured by casting or forging.

Further, this device does not have a mechanism for adjusting the clutch gap between the clutch disk and the torque transmitting member, and since the entire device is covered by a fixed housing, the clutch gap cannot be adjusted when assembled.

Therefore, the present invention was devised in view of these points, and is equipped with an improved clutch mechanism to ensure stable clutch connection, covers the clutch mechanism without the need for a special housing, and is easy to manufacture. It is an object of the present invention to provide a clutch/brake device in which the clutch gap can be easily adjusted when assembled.

The clutch/brake device of the present invention has an elongated cylindrical portion having a hollow portion into which an input shaft is inserted, and a female thread cut into a shaft hole that is smaller in diameter than the elongated cylindrical portion and is formed to penetrate in the axial direction. It has a short cylindrical part, a flange part formed between the long cylindrical part and the short cylindrical part, and a keyway formed in the axial direction in the long cylindrical part, and the input shaft is inserted into the hollow part of the long cylindrical part. and a collar member that is rotatably locked to the input shaft by a key inserted into the keyway; the male thread is screwed into the female thread of the short cylindrical part of the collar member, and the tip is connected to the input shaft. an adjusting bolt that is brought into contact with the tip and moves the collar member in the axial direction of the input shaft by screwing in and out; an output member; an input transmission disk disposed within the output member and fixed to the flange portion of the collar member so as to face the bottom inner surface of the output member so as to be rotatable integrally with the input shaft; an operating mechanism cover member that is fixed to the fuselage and has a brake torque receiving part perpendicular to the input shaft and arranged adjacent to the open end of the output member; the cover member is cylindrical and has a flange part at one end; a retainer loosely mounted on the input shaft so that the flange portion faces the input transmission disk; and a brake connection surface facing the brake torque receiving portion of the operating mechanism cover member on the front and back sides, and a retainer facing the input transmission disk. a torque transmitting portion formed with a clutch connecting surface; and an appropriate number of convex portions formed on an outer peripheral edge that engage with an appropriate number of recesses formed on a peripheral wall of the output member in the axial direction of the input shaft. a torque transmitting member having an inner peripheral edge rotatable to the retainer and whose movement in the direction of the input transmitting disk is restricted by the flange; and an input transmitting disk and torque transmitting member on the side wall of the output member; a viewing window opened at a position corresponding to the member; a clutch spring engaged with the torque transmitting member and the output member so as to bias the torque transmitting member toward the input transmitting disk; and the operating mechanism cover member. a pressure plate disposed within the interior, whose inner peripheral edge is restricted from moving in a direction opposite to the input transmission disk by the retainer, and is movable in the axial direction of the input shaft; the operating mechanism cover member and the pressure plate; a pressure spring that is compressed between the plates and urges the pressure plate in a direction opposite to the input transmission disk; and a pressure spring that is provided within the operating mechanism cover member and urges the pressure plate toward the input transmission disk when the clutch is connected; and an operating mechanism for moving the collar member in the axial direction of the input shaft by screwing in and out the adjuster bolt while visually observing through the peephole, thereby connecting the input transmission disk and the torque transmission member. In addition, when connecting the clutch, the pressure plate is moved toward the input transmission disk against the biasing force of the pressure spring using the operating mechanism, and the tension of the clutch spring is adjusted. The torque transmitting member and the brake torque receiving portion are disengaged by force, and then the torque transmitting member is brought into engagement with the rotating input transmitting disk to rotate the torque transmitting member, and the torque transmitting member and the output member are rotated. By rotating the output member through the uneven engagement with the clutch spring and releasing the operating mechanism, the pressure plate is moved toward the fuselage by the biasing force of the pressure spring against the biasing force of the clutch spring. The clutch connection between the torque transmitting member and the input transmitting disk is released, and then the torque transmitting member is engaged with the brake torque receiving portion to stop the rotation of the torque transmitting member and the output member.

Hereinafter, the present invention will be explained in detail based on examples.

The figures show one embodiment of the clutch/brake device of the present invention used in a power lawn mower. Figure 1 is a sectional front view, Figure 2 is a plan view, and Figure 3 is a partially cutaway bottom view. .

As shown in FIG. 1, a power lawn mower using the clutch/brake device of the present invention has an input shaft 4 which passes through an engine mounting 1 at the bottom of the power lawn mower body and protrudes downward. A drum-shaped output member 31 having a mowing blade 40 fixed thereto is rotatably supported, a clutch/brake mechanism is interposed between the input shaft 4 and the output member 31, and the clutch/brake mechanism is fixed to the engine mounting 1. An operating rod 11 as an operating mechanism is rotatably provided on the operating mechanism cover member 2, and the operating rod 11 is rotated in the direction of arrow A in FIGS. 2 and 3 via a cable (not shown). Therefore, the brake state is released, and then the clutch is connected, and the rotation of the input shaft 4, which is being rotated by the engine (not shown) that is the driving source, is transmitted to the output member 31 via the clutch mechanism. This rotation causes the cutting blade 40 to rotate and cut the lawn, and by releasing the cable, the operating rod 11
rotates in direction B in FIGS. 2 and 3,
The clutch is disconnected, and then the rotation of the output member 31 is stopped and the rotation of the cutting blade 40 is stopped.

As shown in FIG. 1, an engine mounting 1 constituting a part of the machine body is provided at the lower part of the power lawn mower, and an operating mechanism cover member 2 is fixed to the lower surface of the engine mounting 1. This operating mechanism cover member 2 has a through hole in the center thereof for an input shaft 4 that is rotated by an engine (not shown) serving as a drive source, and an annular recess formed concentrically around the through hole. 2b is formed, the outer periphery of the annular recess 2b is bent upward, and an annular stepped plane part is further bent on the outer periphery, and the outer periphery of this stepped plane part is further bent upward to form a peripheral wall 2c. The outer periphery of the peripheral wall 2c is bent horizontally to form a flange portion 2a.
is formed into a cover shape as a whole, and the bottom surface of the engine mounting 1 is tightened by tightening bolts (not shown) inserted into bolt holes 3 (shown in FIG. 2) formed in a plurality of flange portions 2a. is fixed. The bottom surface of the annular recess 2b is connected to the input shaft 4.
It is formed into a planar shape perpendicular to the brake torque receiving section, and the lower surface thereof becomes a brake torque receiving section.

The stepped plane portion of the operating mechanism cover member 2 has 3
Book guide pins 5 are erected upward at equal intervals. Further, a pressure plate 6 disposed within the operating mechanism cover member 2 is loosely mounted on a retainer 24, which will be described later. Three guide pieces 7 are formed on the outer peripheral edge of the pressure plate 6 at positions corresponding to the guide pins 5 so as to protrude outward. The guide pin 5 is inserted into the pin hole 8 formed in the guide piece 7, and the pressure plate 6 is installed inside the operating mechanism cover member 2 so that it can move in parallel in the vertical direction. Between the pressure plate 6 and the operating mechanism cover member 2, 6
A pressure spring 9 is compressed, and its upper end is engaged with and positioned by a spring retainer 10 fixed to the pressure plate 6, and its lower end is in contact with the inner bottom surface of the annular recess 2b of the operating mechanism cover member 2. Due to its spring force, the pressure plate 6 is always pressed against an operating rod 11 as an operating mechanism provided within the operating mechanism cover member 2.

The operating mechanism is composed of a guide pin 5, a pressure plate 6, and an operating rod 11 that is rotatably provided through the peripheral wall 2c of the operating mechanism cover member 2. Two pushing parts 11a are formed which are bent along the outer periphery of the input shaft 4 and bent on both sides.
is abuttingly engaged with pressing members 12, 12 fixed to the pressure plate 6, and serves as an operating fulcrum of the operating rod 11. As a result, when a cable (not shown) connected to the clutch lever connected to the arm 11b of the operating rod 11 is pulled and the operating rod 11 is rotated, the pressure plate 6 is guided by the guide pin 5 and moved downward. Move parallel to .

As shown in FIG. 1, a collar member 1 is attached to the input shaft 4 from the engine mounting 1 so that its tip protrudes downward from the through hole of the operating mechanism cover member 2.
3 is penetrated and rotated integrally with the input shaft 4 by a half-moon-shaped key 18. This collar member 13 has, from the top, a long cylindrical portion 13a, a flange portion 13b, and a short cylindrical portion 13c with a small diameter. A drum-shaped output member 31 is rotatably supported at the tip of the input shaft 4 via the short cylindrical portion 13c of the collar member 13 and a bearing 20. An input transmission disk 15 is fixed to the flange portion 13b of the collar member 13 and is arranged to face the inner surface of the bottom of the collar member 13, and is provided so as to be rotatable integrally with the input shaft 4 and movable in the axial direction.

The output member 31 provided on the short cylindrical portion 13c of the collar member 13 via the bearing 20 has a bottom portion located on the outer periphery of the bearing 20 and facing the input transmission disk 15, and a peripheral wall formed by bending around the outer periphery of the bottom portion. The opening end thereof is arranged so as to be adjacent to the brake torque receiving portion of the operating mechanism cover member 2, and serves as a cover for the clutch mechanism. is attached to the output member 31 by screwing and fastening a nut 42 to a bolt 41 inserted through the base from inside the output member 31.

On the other hand, the input transmission disk 15
The outer periphery of the inner periphery that engages with the upper surface of the flange portion 13b of the collar member 13 is bent downward to form a disk shape with a horizontal surface portion formed on the outer periphery. and the flange portion 16a of the cylindrical key stopper 16 fitted to the long cylindrical portion 13a of the collar member 13, and are fixed with rivets 17.

Further, the collar member 13 is formed with a slotted groove that is divided into two and serves as a keyway 14 extending from the long cylindrical portion 13a to the flange portion 13b. The tip 16b of the key stopper 16 fitted into the long cylindrical portion 13a of the collar member 13 projects beyond the tip of the long cylindrical portion 13a. A key stopper 16 fixed to this collar member 13 closes the outside of the slotted groove of the long cylindrical portion 13a to form a key groove 14, and the long cylindrical portion 13a of the collar member 13 is connected to the input shaft 4 to connect the one key to the input shaft 4. The key 18 is engaged and fitted into the groove 14, and the input transmission disk 15 is rotated together with the input shaft 4.

Further, a shaft hole in the axial direction of the input shaft 4 is formed in the short cylindrical portion 13c, and a female thread 1 is formed in this shaft hole.
3d, an adjusting bolt 19 having a male thread 19a around the entire circumference of the cylindrical shaft is screwed, and the adjusting bolt 19 is screwed with the tip of the adjusting bolt 19 in contact with the tip of the input shaft 4. By doing so, it is possible to move the collar member 13 in the axial direction of the input shaft 4, adjust the amount of engagement thereof, and adjust the clutch gap as described later. Further, a washer 21 that holds the collar member 13 and a bearing 20 fitted to the outer periphery of the short cylindrical portion 13c is applied to the lower end surface of the short cylindrical portion 13c, and the bolt 22 is attached to the adjuster bolt through the spring washer 23. 19 and is screwed into the screw hole 4a of the input shaft 4 to prevent the collar member 3 and the bearing 20 from coming off downward, and the dust cover 43 held on the inner peripheral edge of the output member 3 Covers the bearing part.

A cylindrical retainer 24 is loosely mounted above the collar member 13 of the input shaft 4. This retainer 24 has a flange portion 24a formed at its lower end, and is suspended from the inner peripheral edge of the pressure plate 6 by a retaining ring 25 whose upper end is provided so that the flange portion 24a faces the input transmission disk 15. There is.
Therefore, the pressure plate 6 is connected to the retaining ring 2.
5 restricts movement in the opposite direction to the input transmission disk 15.

This retainer 24 includes an operation mechanism cover member 2.
A torque transmission member 26 disposed between the input transmission disk 15 and the input transmission disk 15 is rotatably provided. The torque transmitting member 26 has a torque transmitting portion having a brake braking surface facing the brake torque receiving portion of the operating mechanism cover member 2 and a clutch connecting surface facing the input transmitting disk 15 on the front and back sides thereof. Annular linings 27a, 27b are fixed to the braking surface and the clutch connecting surface. The inner peripheral edge 26a of the torque transmitting member 26 is rotatably engaged with the flange portion 24a of the retainer 24 with a thrust bearing 28 interposed therebetween.

Further, a support portion 29 is formed on the outer peripheral edge of the torque transmission member 26 to protrude outward as shown in FIGS. 1 and 3, and a large diameter pin hole 30 is bored in this support portion 9. Support pin 3 fixed to output member 31
2 is inserted into this pin hole 30 with a clearance, and the tip of the support pin 32 passes through the spring stopper 33, and is further fixed to the tip of the spring stopper 33 by a retaining ring 34 fixed to the tip.
It is prevented from coming off.

The clutch spring 35, which is engaged with the torque transmission member 26 and the output member 31, is compressed between the support portion 29 of the torque transmission member 26 and the spring stopper 33, and its spring force causes the torque transmission member 26 to be compressed. is constantly pressed against the output member 31 side.

As a result, when the operating rod 11 is rotated to push the pressure plate 6 downward, the torque transmission member 26 is pushed toward the input transmission disk 15 by the spring force of the clutch spring 35, and its lining 27b is in pressure contact with the input transmission disk 15. Then, when the pressing force of the operating rod 11 on the pressure plate 6 is released, the pressure plate 6 is pushed upward by the pressure spring 9, and accordingly, the torque transmission member 26
The brake lining 27a is pressed against the brake torque receiving portion to perform braking.

Convex portions 36 are formed at three equally spaced protrusions on the outer peripheral edge of the torque transmission member 26, and these convex portions 36 are formed on the guide member 3 made of synthetic resin such as glass fiber-containing resin.
7 is attached so as to cover the tip and periphery. On the other hand, on the peripheral wall of the output member 31, three recesses 38 with which the projections 36 of the torque transmission member 26 engage are formed at equal intervals in the axial direction of the input shaft 4. 38, and the distal end of the guide member 37 is provided with a clearance on the inner wall of the recess 38, so that both sides or one side thereof are in contact with each other so as to be slidable in the vertical direction. As a result, the output member 31 can rotate together with the torque transmission member 26, and since the guide member 37 is made of synthetic resin, it makes good contact with the side wall of the recess 38, and the output member 31 can move up and down during rotation. Even if it vibrates, the guide member 3
Since there is a clearance between the tip of the output member 7 and the inner wall of the recess 38, the vibration of the output member 31 is transmitted to the torque transmission member 2.
6 is not transmitted. And the torque transmission member 2
6 and the output member 31 during their rotation are absorbed by the clutch spring 35.

In addition, a peephole is provided on the side wall of the output member 31 at a position corresponding to the input transmission disk 15 and the torque transmission member 26, and the gap between the torque transmission member 26 and the input transmission disk 15 can be visually observed from the peephole 44. The clutch gap can be adjusted smoothly, and the amount of wear on the linings 27a, 27b of the torque transmitting member 26 can be checked. Note that by fitting a transparent cover to the viewing window 44, it is possible to prevent work debris, dirt, water, etc. from entering the inside.

Therefore, when assembling the collar member 13, the tip of the adjusting bolt 19 is brought into contact with the tip of the input shaft 4, and the adjusting bolt 19 is rotated by engaging the tool in the groove 19b of the head. Then, the collar member 13 moves in the axial direction of the input shaft 4, and the input transmission disk 1 fixedly attached to the flange portion 13b of the collar member 13 moves.
5 also moves together, and the clutch clearance between the torque transmission member 26 and the input transmission disk 15 is adjusted, thereby making it possible to obtain a constant set clearance. Female thread 19a formed on this adjustment bolt 19
By reducing the lead and pitch of the clutch, the clutch clearance can be adjusted accurately. Further, the tightening force of the bolt 22 during assembly is applied from the washer 21 to the short cylindrical portion 1 of the collar member 13 via the bearing 20.
3c, and the female thread 13d of the short cylindrical portion 13c
The male thread 19a of the adjuster bolt 19 is in close contact with the collar member 13, and the collar member 13 can be securely fixed.

Next, the operation of this embodiment will be explained. 1st
In the braking state where the pressure spring 9 is stretched as shown in the figure, the torque transmission member 26 is pulled upward via the thrust bearing 28 by the retainer 24 suspended from the pressure plate 6, and the lining 27a engages with the brake torque receiving portion on the lower surface of the bottom of the annular recess 2b of the operating mechanism cover member 2, and on the other hand, the clutch spring 35 contracts and the lining 27b of the torque transmitting member 26 does not come into contact with the input transmitting disk 15. are spaced apart. Therefore, even if the engine is driving, the input shaft 4 and the input transmission disk 15 idle and no rotational force is transmitted to the output member 31.
The cutting blade 40 remains stationary and the engine maintains an idling operating state.

Next, when rotating the cutting blade 40, use the operating rod 11.
When the operating rod 11 is rotated in the direction of arrow A in FIGS. 2 and 3 by pulling a cable (not shown) connected to the operating rod 11, the pushing portion 11a of the operating rod 11,
11a presses the pressing member 12 of the pressure plate 6 downward in FIG. As a result, the pressure spring 9 contracts, and the pressure plate 6 is guided by the guide pin 5 and moves downward in parallel. Accordingly, the clutch spring 35 expands, and the torque transmission member 26 follows the pressure plate 6 and moves downward while maintaining the engaged state with the retainer 24 and the thrust bearing 28, and first transmits the torque. The lining 27a of the member 26 is separated from the brake torque receiving portion of the operating mechanism cover member 2, and then the lining 27b of the torque transmitting member 26 comes into contact with the input transmitting disk 15 rotating together with the input shaft 4. Then, as the pressure spring 9 contracts, the clutch spring 35 expands and the lining 27b is pressed against the input disk 15. Then, when the pressure plate 6 moves further downward, the thrust bearing 28 provided on the retainer 24 is separated from the torque transmitting member 26 and the engaged state is released, and a gap is created between them, and the force applied upwardly by the pressure spring 9 to the torque transmitting member 26 disappears, and the braking force of the torque transmitting member 26 is released. A clutch force is generated, and the power of the input shaft 4 is transmitted to the output member 31 via the collar member 13, input transmission disk 15, torque transmission member 26, convex portion 36, and guide member 37, thereby rotating the cutting blade 40.

When the cable is released, the pressure plate 6 is pushed upward in FIG. 1 by the pressure spring 9, and the operating rod 11 is rotated in the direction of arrow B in FIGS. 2 and 3. Pull the retainer 24 upward. As a result, the gap between the thrust bearing 28 and the torque transmission member 26 is eliminated, and the thrust bearing 28
comes into abutting engagement with the torque transmission member 26 and pulls the torque transmission member 26 upward. Accordingly, the clutch spring 35 contracts and the torque transmission member 26
The lining 27b is separated from the input transmission disk 15, cutting off the connection between the torque transmission member 26 and the input transmission disk 15, and then, through the neutral state, the lining 27a is pressed against the brake torque receiving portion of the operating mechanism cover member 2, and this The rotation of the output member 31 is braked to stop the rotation of the cutting blade 40.

In the above embodiment, the output member is provided with a cutting blade, but other working tools can be fixed to it, and the output member can also be used as a pulley, etc., and this device can be used for various tasks. It can be used for machines etc.

As described above, according to the present invention, when the clutch is connected, the torque transmission member is always pressed against the input transmission disk by the biasing force of the clutch spring, so the clutch connection is stable, and the clutch spring is not attached to the output member. If any overload greater than the force is applied, the clutch connecting surface rotates idly and does not transmit the overload to the drive source, so the drive source does not stop and damage to the clutch mechanism can be prevented. Further, since the output member is formed into a drum shape and the input transmission disk and the clutch connection portion of the torque transmission member are housed within the output member, it is possible to prevent dust from entering the clutch mechanism without providing a special cover member. Furthermore, the input transmission disk and the output member face each other, the torque transmission member is disposed between the brake torque receiving part and the input transmission disk, and a pressure plate operated by the operating mechanism forms the brake torque receiving part. Since they are disposed within the cover member, each of these parts can be manufactured by pressing or sheet metal, making it easy to manufacture and cheaper than this type of device using cast or forged products. can.

Furthermore, by rotating the adjustment bolt, the collar member provided with the input transmission disk can be moved and adjusted in the axial direction with respect to the input shaft, so the clutch gap between the input transmission disk and the torque transmission member can be adjusted. It is easy to adjust the clutch gap because it can be adjusted while visually observing from the window.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a sectional front view, Fig. 2 is a plan view, Fig. 3 is a partially cutaway bottom view, and Fig. 4 shows the state in which the operating rod is installed. The side view and FIG. 5 are exploded perspective views of the collar member, key stopper, adjuster bolt, input shaft, and key. DESCRIPTION OF SYMBOLS 1... Engine mounting, 2... Operating mechanism cover member, 4... Input shaft, 6... Pressure plate, 9... Pressure spring, 1
1... Operating rod, 13... Collar member, 13a...
Long cylindrical part, 13b...Flange part, 13c...Short cylindrical part, 13d...Female thread, 14...Keyway, 1
5... Input transmission disk, 19... Adjustment bolt, 19a... Male thread, 19b... Groove, 24...
...retainer, 26...torque transmission member, 27a,
27b...Lining, 31...Output member, 35
...Clutch spring, 36...Protrusion, 38...
...Recess, 44... Peephole.

Claims (1)

[Claims for Utility Model Registration] An elongated cylindrical portion 13a having a hollow portion into which the input shaft 4 is inserted, and a diameter smaller than the elongated cylindrical portion 13a,
A female thread 13 is inserted into the shaft hole formed to penetrate in the axial direction.
A short cylindrical portion 13c carved with d and a long cylindrical portion 13a.
and the short cylindrical portion 13c.
3b and a key groove 14 formed in the axial direction in the long cylindrical part 13a, and the input shaft 4 is inserted into the hollow part of the long cylindrical part 13a, and the key 1 is inserted into the key groove 14.
A collar member 13 is provided to be locked in the rotational direction to the input shaft 4 at 8; and a female thread 1 of the short cylindrical portion 13c of the collar member 13;
an adjusting bolt 19 having a male screw 19a screwed into the input shaft 4; a drum-shaped output member 31 rotatably supported by the short cylindrical portion 13c of the collar member 13 provided in the output member 31; an input transmission disk 15 fixedly attached to the flange portion 13b of the output member 13 and rotatable integrally with the input shaft 4; a brake disposed perpendicular to the input shaft 4 and adjacent to the open end of the output member 31; an operating mechanism cover member 2 having a torque receiving portion and fixedly attached to the machine body; having a cylindrical shape and having a flange portion 24a at one end; a retainer 24 loosely mounted on the shaft 4; and a torque transmitting section having a brake connecting surface facing the brake torque receiving section of the operating mechanism cover member 2 and a clutch connecting surface facing the input transmitting disk 15 on the front and back sides. , an appropriate number of protrusions 3 formed on the outer peripheral edge of the output member 31 to engage with recesses 38 formed in an appropriate number in the axial direction of the input shaft 4 on the peripheral wall of the output member 31;
a torque transmitting member 26 having an inner circumferential edge 26a rotatable relative to the retainer 24 and restricted from moving in the direction of the input transmitting disk 15 by the flange portion 24a; and the output member 31; Input transmission disk 1 on the side wall of
5 and a viewing window 44 opened at a position corresponding to the torque transmitting member 26;
A clutch spring 3 is connected to the torque transmitting member 26 and the output member 31 so as to be biased in the direction.
5; an input transmission disk 15 disposed within the operating mechanism cover member 2 and having an inner peripheral edge connected to the retainer 24;
a pressure plate 6 that is movable in the axial direction of the input shaft 4 and whose movement in this direction is regulated;
and; compressed between the operating mechanism cover member 2 and the pressure plate 6, and the pressure plate 6
a pressure spring 9 that biases the pressure plate 6 in the direction opposite to the input transmission disk 15; and an operation mechanism provided in the operation mechanism cover member 2 that moves the pressure plate 6 in the direction of the input transmission disk 15 when the clutch is connected. Clutch/brake device with;