JPS6123409B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention transmits the rotational torque of the input shaft to the output side via a clutch mechanism, and at the moment the torque transmission is interrupted, the rotation of the output side is stopped by the brake mechanism. 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. . This device has a clutch disk fixed to an input shaft arranged vertically inside a housing, an output shaft with a cutting blade attached thereto, arranged concentrically with the input shaft, and a disk-like disk that can be engaged with the clutch disk. A torque transmission member and a brake disk 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 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. Also, if a stone or similar object 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, there is a risk that the engine will stop or the equipment will be damaged due to overload. 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 casting.

Therefore, the present invention has been devised in view of these points, and provides an improved clutch mechanism that provides stable clutch connection, covers the clutch mechanism without the need for a special housing, and is easy to manufacture. The purpose of the present invention is to provide a clutch brake device that provides a reliable clutch brake system.

The clutch/brake device of the present invention includes a drum-shaped output member rotatably supported by an input shaft; an input transmission disk mounted to be integrally rotatable with the input shaft; an operating mechanism fixed to the fuselage, having a brake torque receiving section perpendicular to the input shaft and arranged adjacent to the open end of the output member; a cover member; a retainer that is cylindrical and has a flange portion at one end, and is loosely attached to the input shaft so that the flange portion faces the input transmission disk; a brake torque of the operating mechanism cover member on the front and back sides; A torque transmitting portion having a brake connecting surface facing the receiving portion and a clutch connecting surface facing the input transmitting disk engages with a suitable number of recesses formed in the peripheral wall of the output member in the axial direction of the input shaft. a torque transmitting member having an appropriate number of convex portions formed on an outer peripheral edge thereof, the inner peripheral edge thereof being rotatable relative to the retainer, and movement of the torque transmitting member being restricted by a flange portion in the direction of the input transmission disk; a clutch spring that is engaged with the torque transmission member and the output member so as to bias the torque transmission member toward the input transmission disk; and a clutch spring that is disposed within the operating mechanism cover member and whose inner peripheral edge is opposed to the retainer. a pressure plate which is restricted from moving in the direction of the input transmission disk and is movable in the axial direction of the input shaft; the pressure plate is compressed between the operating mechanism cover member and the pressure plate; a pressure spring that biases the pressure plate in a direction opposite to the input transmission disk; and an operation mechanism that is provided within the operation mechanism cover member and that moves the pressure plate toward the input transmission disk when the clutch is connected. It is characterized by
When connecting the clutch, the operating mechanism moves the pressure plate toward the input transmission disk against the biasing force of the pressure spring, and the biasing force of the clutch spring connects the torque transmitting member and the brake torque receiver. After that, the torque transmission member is brought into engagement with the rotating input transmission disk to rotate the torque transmission member, and the output member is rotated by the uneven engagement between the torque transmission member and the output member. By 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, and the clutch between the torque transmitting member and the input transmitting disk is After the connection is released, the torque transmitting member is brought into engagement 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. FIG. 3 is a side view showing a state in which the rod is attached.

As shown in FIG. 1, a power lawn mower using the clutch/brake device of the present invention has a bottom outer surface at the tip of an input shaft 4 which passes through an engine mounting 1 at the bottom of the power lawn mower and projects 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. The operation mechanism cover member 2 is rotatably provided with an operation rod 11 as an operation mechanism, and the operation rod 11 is rotated in the direction of arrow A in FIGS. 2 and 4 via a cable (not shown). Then, 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. The output member 31 is rotated, and this rotation causes the cutting blade 40 to rotate to mow the lawn, and by releasing the cable, the operating rod 11 can be moved as shown in FIGS. 2 and 4. The clutch is rotated in the direction B to disconnect the clutch, 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. 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 side 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 a pressing member 12.12 fixed to the pressure plate 6, and serves as a working 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 the half-moon key 18. The 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 portion of the input shaft 4 so as to be rotatable together with the input shaft 4.

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 has a slotted groove 1 divided into two parts extending from the long cylindrical part 13a to the flange part 13b.
4 and 14 are formed. and collar member 1
The key stopper 16 fitted into the long cylindrical portion 13a of 3
The tip 16b protrudes from the tip of the long cylindrical portion 13a. The key stopper 16 fixed to this collar member 13 allows the slotted groove 1 of the long cylindrical portion 13a to
The outer sides of 4 and 14 are closed to form a keyway, which makes molding easier compared to forming the keyway by cutting the inside of the long cylindrical part 13a, and reduces the processing cost of the keyway. be able to. Then, the long cylindrical portion 13a of the collar member 13 is fitted to the input shaft 4 by engaging the half-moon key 18 in one of the key grooves, 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. Also, engine oil leaking from the engine and falling should be removed from the tip 1 of the key stopper 16.
6b and is guided, the key groove on the side where the half-moon key 18 is not engaged serves as an ejection path, and is ejected downward through the ejection path of the flange portion 13b of the collar member 13 connected thereto.

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 provided at its upper end 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. This 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 portion 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. The thrust bearing 28 has a plurality of tongue pieces 28b formed at the outer end of the retainer 28a, and is held by bending the tongue pieces 28b along the outer edge of the flange portion 24a of the retainer 24. This prevents the thrust bearing 28 from inclining due to the trajectory of the rollers 28c, and prevents the rollers 28c from riding on the trajectory and being damaged.

Note that the thrust bearing is not limited to the thrust bearing 28, and any other rolling bearing or sliding bearing with low frictional resistance may be used.

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 5, and a large diameter pin hole 30 is bored in this support portion 29. The support pin 32 fixed to the output member 31 is inserted into the pin hole 30 with a clearance, and the tip of the support pin 32 passes through the spring stopper 33, and is further inserted into the retaining ring 34 fixed to the tip. Yotsute Spring Stopper 3
3 is prevented from coming off.

A clutch spring 3 is disposed between the support portion 29 of the torque transmission member 26 and the spring stopper 33.
5 is contracted, and its spring force constantly presses the torque transmission member 26 toward the output member 31 side. Three clutch springs 35 are provided at equal intervals, and the spring force of one of them is the same as the spring force of one pressure spring 9. The spring force of the shear spring 9 is equal to 2 of the spring force of the clutch spring 35.
It is set to double.

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. This braking force is the magnitude obtained by subtracting the spring force of the clutch spring 35 from the spring force of the pressure spring 9, and even if two of the pressure springs 9 are damaged due to breakage, etc. Since the force is larger than the spring force of the clutch spring 35, braking force can be secured and safety is ensured. Note that at this time, the torque transmission member 26 is guided by the support pin 32 and moves.

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 are in contact with the inner wall of the recess 38 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. Further, the guide member 37 of the convex portion 36 has an arcuate tip as shown in FIGS. 5 and 6, and when it comes into contact with the inner wall of the concave portion 38,
The contact is always made at one point, and vibrations caused by the rotation of the output member 31 are not transmitted to the torque transmission member 26 as described above. The vibration between the torque transmitting member 26 and the output member 31 that occurs when they rotate is absorbed by the clutch spring 35.

When assembling the collar member 13, the clutch gap between the torque transmitting member 26 and the input transmitting disk 15 is changed by engaging a tool in the groove 19b of the head of the adjusting bolt 19 and turning the collar member 13. When the disk plate 15 is moved, the disk plate 15 also moves together with the disk plate 15, thereby making it possible to obtain a constant set gap. By reducing the lead and pitch of the male thread 19a formed on the adjustment bolt 19, the clutch gap can be adjusted accurately, and the tightening force of the bolt 22 during assembly is transmitted from the washer 21 via the bearing 20. The signal is transmitted to the short cylindrical portion 13c of the collar member 13, and the internal thread 13 of the short cylindrical portion 13c
d and the male thread 19a of the adjuster bolt 19 are in close contact with each other, so that the collar member 13 can be securely fixed.

Further, a peephole is provided on the side wall 31a of the output member 31, and the gap between the torque transmission member 26 and the input transmission disk 15 can be visually observed through the peephole 44, allowing smooth adjustment of the clutch gap. The amount of wear on the linings 27a and 27b of the torque transmission member 26 is inspected.
In addition, when the transparent cover is fitted into the peephole 44,
It is possible to prevent work debris, earth and sand, water, etc. from entering the interior.

Reference numeral 45 denotes a water drain hole formed in the operating mechanism cover member 2, which is formed at the lowest part of the annular recess 2b and at a position outside of the contact surface of the lining 27a of the torque transmitting member 26, and is located at the outer circumferential side of the contact surface of the lining 27a of the torque transmitting member 26. Water entering the cover member 2 falls into the output member 31 through the drain hole 45.

Numeral 46 is a small hole formed at the bottom of the tip of the support part 29 of the output member 31, and the water and engine oil that have fallen into the inside of the output member 31 are drawn to the outside by the centrifugal force caused by the rotation of the output member 31. 46
and discharged to the outside.

Reference numeral 47 denotes a stopper bolt for regulating the stroke of the pressure plate 6, and is screwed from above into a screw hole 49 of a protrusion 48 formed protruding from both peripheral edges of the pressure plate 6 in a direction perpendicular to the operating rod 11. , fixing nut 50 and stopper bolt 47
It prevents rotation. The distance l between the tip of the stopper bolt 47 and the step-like flat part of the operating mechanism cover member 2 is equal to the distance l between the lining 27 on the operating mechanism cover member 2 side.
The distance li between the flange portion 24a of the retainer 24 and the rivet 17 of the collar member 13 is set smaller than the distance li in consideration of the amount of wear a. As a result, the cable is pulled, the operating rod 11 is rotated, the pressure plate 6 is pushed downward, and the clutch spring 35 is
When the lining 27b of the torque transmission member 26 is pressed against the input transmission disk 15 to connect the clutch, the tip of the stopper bolt 47 always comes into contact with the operating mechanism cover member 2, and the retracting limit of the cable is fixed. Since l ₁ >l, the retainer 24 does not come into contact with the rivet 17.

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 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 4 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 4. 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 workers can be fixed thereto, and the output member can also be used as a pulley, etc., and this device can be used for various operations. 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 it is placed inside the cover member,
Since each of these members can be manufactured by pressing or sheet metal, it is easy to manufacture and can be manufactured at a lower cost than this type of device using cast or forged products.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a front cross-sectional view, FIG. 2 is a plan view, FIG. 3 is a bottom view, FIG. 4 is a side view showing how the operating rod is attached, and FIG. FIG. 5 is a plan view of another embodiment in which a guide member is slidably provided in a recessed portion of a rotating member, and FIG. 6 is a sectional view of the same. DESCRIPTION OF SYMBOLS 1... Engine mounting, 2... Operating mechanism cover member, 4... Input shaft, 6... Pressure plate, 9... Pressure spring, 1
DESCRIPTION OF SYMBOLS 1... Operating rod, 13... Collar member, 15... Input transmission disk, 24... Retainer, 26... Torque transmission member, 27a, 27b... Lining,
28... Thrust bearing, 29... Support part, 31...
...Output member, 35...Clutch spring, 36
...Convex portion, 37...Guide member, 38...Concave portion.

Claims (1)

[Scope of Claims] 1. A drum-shaped output member 31 that is rotatably supported by the input shaft 4; an input transmission disk 15 mounted to be rotatable integrally with the input shaft 4; a brake torque receiving portion perpendicular to the input shaft 4 and disposed adjacent to the open end of the output member 31; a retainer having a cylindrical shape and having a flange portion 24a at one end, and loosely mounted on the input shaft 4 so that the flange portion 24a faces the input transmission disk 15; 24; and a torque transmitting portion having a brake connecting 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, and a peripheral wall of the output member 31. An appropriate number of convex portions 3 formed on the outer peripheral edge of the input shaft 4 to engage with an appropriate number of concave portions 38 formed in the axial direction of the input shaft 4.
a torque transmitting member 26 having an inner circumferential edge 26a rotatable about the retainer 24 and restricted from moving in the direction of the input transmitting disk 15 by the flange portion 24a; Input 26 transmission disk 15
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; 2. The clutch/brake device according to claim 1, wherein the convex portion 36 is provided with a guide member 37 made of synthetic resin that covers the periphery and tip thereof. 3. The clutch/brake device according to claim 2, wherein the guide member 37 has a distal end thereof engaged with the inner wall of the recess 38 with a clearance therebetween. 4. The clutch/brake device according to claim 2, wherein the guide member 37 has an arcuate tip and contacts the inner wall of the recess 38.