JPS5936136B2 - Mounting structure of disk plate in friction clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting structure for a disk plate in a friction clutch, in which a cylindrical collar member having a flange portion approximately in the middle is provided with a plurality of slots along the axial direction from one end. A groove is formed across the flange portion, a cylindrical key stopper is fitted into the collar member, and a disc brake is inserted between the flange portion of the key stopper and the flange portion of the collar member. and fix it in one piece 1-7
The collar and one member are keyed to the output shaft connected to the engine, leaving at least one keyway, and the keyway is used as a discharge path for oil, etc. Its purpose is to simplify and facilitate the molding of the keyway for key engagement between the disc brake I and the output shaft connected to the engine (to reduce manufacturing costs). At the same time, the remaining keyway is used as a drainage path for oil leaking from the engine, and the disc plate 1.
To provide a mounting structure for a disc brake 1 in a friction clutch, which prevents oil etc. from flowing into the working surface of the friction clutch and enables reliable clutch connection.

Hereinafter, an embodiment in which the present invention is applied to a power lawn mower will be described with reference to the drawings.

1 is an engine mounting ink, and a fixing member 2 is attached to the bottom surface of the ink.
is fixed by a tightening gilt (not shown) that passes through a plurality of bolt holes 3 formed in the flange portion 2a.

An output shaft 4 protrudes below the central portion of the identification member 2 and is connected to the crank f-axis (not shown) of the engine.

Three guide pins 5 are erected upward on the fixing member 2 at equal intervals, and three guide pins 47 are formed on the periphery of the pressure plate 60 at positions corresponding to the guide pins 5 so as to protrude outward. do.

Then, the guide pin 5 is inserted through the pin hole 8 formed in the side piece 7, and the pressure plate 6 is installed inside the fixing member 2 so that it can move in parallel in the vertical direction.

Reference numeral 9 denotes six pressure springs arranged at equal intervals between the pressure plate 6 and the fixed member 2, the upper end of which is engaged with a spring retainer 10 fixed to the pressure plate 6 for positioning, and the lower end of which is fixed to the fixed member. Pressure plates -1 and -6 are brought into contact with the inner bottom surface of the annular recess 2b of the fixing member 2 by the spring force, and
It is always in pressure contact with the operating rod 11 which is rotatably provided through the hole c.

This operating rod 11 is bent along the outer periphery of the output shaft 4, and has two bent portions 11a on both sides thereof.
lla is abutted and engaged with the suppression members 12, 12 fixed to the pressure plate 6, and serves as the 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 moves downward. Move parallel.

Reference numeral 13 denotes a collar member, which includes an elongated cylindrical portion 13a and a flange portion 13.
b and a short cylindrical portion 13c with a small diameter, and two slot grooves 14, 14 are formed extending from the long cylindrical portion 13a to the flange portion 13b.

The disc plate 1, 15 is fixed to the flange part 13b of the collar member 13 by the flange part 16a of the cylindrical key stopper 16 fitted in the long cylinder part 13a, and is fixed integrally with the rivet 17. The tip 16b of 16 protrudes from the tip of the long cylindrical portion 13a.

A key stopper 16 fixed to this collar member 13 closes the outside of the slot grooves 14, 14 of the long cylindrical portion 13a to form a key groove 13d.
Compared to forming the key groove by cutting the inside of the long cylindrical portion 13a, it is easier to form the key groove, and the processing cost of the key groove can be reduced.

The long cylindrical portion 13a of this collar member 13 is fitted to the output shaft 4 by engaging the half-moon key 18 in the one key groove 13d,
The disk plate 15 is rotated together with the output shaft 4.

Then, an adjustment bolt 19 having a male thread 19a around the entire circumference of the cylindrical shaft is screwed into the female thread 13e formed in the shaft hole of the short cylindrical portion 13c, and the amount of fitting of the collar member 13 is adjusted by the adjustment bolt 19. 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. It passes through and is screwed into the screw hole 4a of the output shaft 4 to allow the collar member 13 and the bearing 20 to come out downward.

In addition, the engine oil that leaks from the engine and falls, or is scattered due to the output shaft rotating 40 times, should be removed from the key stopper 16.
The receiver is stopped and guided at the tip 16b of the half-moon key 1.
The key groove 13d on the side where 8 is not engaged becomes the ejection path,
It is prevented from being discharged downward through the discharge path of the clutch portion 13b of the collar member 13 connected thereto and flowing into the working surface of the disk plate 150.

The key stopper 16 has its tip 16 as shown in FIG.
If b is formed into a trumpet shape, falling engine oil, etc. can be more reliably received and guided.

Moreover, the slotted grooves 14, 14 formed in the collar member 13 may be formed in other places as needed.

24 is a cylindrical retainer having a flange portion 24a;
+, 1. It is suspended on the inner periphery of the pressure plate 6 by a ring 25.

Reference numeral 26 denotes a clutch plate, which is disposed between the disc plates 1 and 15 and the fixing member 2, and has annular linings 27a and 2γb fixed to both sides thereof.

The inner peripheral portion 26a of the clutch plate 1/26 is rotatably engaged with the flange portion 24a of the retainer 24 via the thrust bearing 28, so that the rotational force of the clutch plate 26 generated when the clutch is connected is transferred to the flange portion 24a of the retainer 24. is not transmitted.

Reference numeral 29 denotes support portions formed at three locations on the periphery of the clutch play 1 and 260 to protrude outward, and this support portion 29 has a large diameter pin hole 30 formed therein.

Reference numeral 31 denotes a rotating member rotatably provided on the output shaft 4 via a bearing 20. A support pin 32 fixed to the rotating member 31 is inserted into the pin hole 30 with a clearance.
The tip of the support pin 32 passes through a kelp-shaped spring stopper 33, and a retaining ring 34 fixed to the tip prevents the spring stopper 33 from being removed.

35 is a clutch spring, which is compressed between the support part 29 of the clutch plate 26 and the spring stopper 33, and its spring force increases the clutch pull l/-1-2.
6 is constantly pressed against the rotating 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 901. By providing six pressure springs 9, the spring force of the pressure spring 9 is is set to twice the spring force of the clutch spring 35.

As a result, when the operating rod 11 is rotated to push the pressure plate 6 in the direction F, the clutch plate 1-26 is pushed in the direction of the disc plate 15 by the spring force of the clutch spring 35, and its lining 27b
is in pressure contact with disc plates 1 and 15.

Then, when the pressing force of the operating rod 11 on the button 1/shut plate 6 is released, the pressure plate 6 is pushed upward by the pressure spring 9, and the clutch plates 1 and 26 are accordingly pushed upward by the clutch spring 35. When raised, the lining 27a is brought into pressure contact with the fixed member 2 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. Even if two of the pressure springs 9 are damaged due to breakage or the like, the spring force of the pressure spring 9 will be the same as that of the clutch spring 35. Since it is thicker than the spring force, braking force can be secured and safety is achieved.

In addition, at this time, the clutch plays 1 and 26 are connected to the support pin 32.
move guided by.

Reference numeral 36 denotes protrusions formed at three equally spaced protrusions on the periphery of the clutch plate 26, and a guide member 37 made of glass fiber-containing resin or the like is attached to the protrusions 36.

Reference numeral 38 denotes recesses formed at three equal intervals on the side wall of the rotating member 31 in correspondence with the protrusions 36 of the clutch plate 26, and the tip of the guide member 37 has a clearance between the protrusions 36 of the clutch plate 26 and the recesses 38. Both sides or one side are in contact with each other and are provided so as to be slidable in the vertical direction.

This allows the rotating member 31 to rotate together with the clutch plays 1 and 26, and even if the rotating member 31 vibrates up and down during rotation, there is a clearance between the tip of the guide member 37 and the inner wall of the four parts 38. Therefore, vibrations of the rotating member 31 are not transmitted to the clutch plate 26.

The vibration between the clutch pre=1.26 and the rotating member 31 that occurs when they rotate is absorbed by the clutch spring 35.

A working blade 40 is attached to the bottom outer surface of the rotating member 31 via a spacer -39 by tightening a nut 42 to a bolt 41 inserted through the base from inside the rotating member 31.

43 is a dust cover attached to the rotating member 31.

The clutch gap between the clutch plate 26 and the disc plate 15 is created by rotating the adjustment bolt 19 by engaging a tool in the groove 19b of the head when assembling the collar member 130.
When the collar member 13 is moved, the disk plate 15 is also moved together with the movement, thereby making it possible to obtain a constant set gap.

By reducing the lead and pitch of the male thread 19a formed on this adjustment bolt 19, the clutch gap can be adjusted accurately. is transmitted to the short cylindrical portion 13c of the collar member 13, and the short cylindrical portion 1
3c female thread 13e and adjustment bolt 19 male thread 1
The collar member 13 to which 9a is in close contact can be securely fixed.

44 is a drain hole formed in the fixing member 2, and the annular recess 2
Lining 27a of clutch plate 26 at the bottom of b
It is formed at a position offset from the contact surface of the
Water entering the fixed member 2 falls into the rotating member 31 through the drain hole 44.

Numeral 45 is a small hole formed at the bottom of the tip of the support part 29 of the rotating member 31. Water and engine oil that have fallen inside the rotating member 31 are drawn to the outside by the centrifugal force caused by the simultaneous rotation of the rotating member 31. It is discharged from the hole 45 to the outside.

Next, the operation of this embodiment will be explained.

In the braking state where the pressure spring 9 is stretched as shown in FIG. is in pressure contact with the lower surface of the bottom of the annular recess 2b of the fixing member 2, and on the other hand, the clutch spring 35 is contracted, and the lining 27b of the clutch plate 1-26 is separated from the disc plate 15 without contacting it.

Therefore, even if the engine is driven at 1, the output shaft 4 and the disc plate 15 rotate idly, no rotational force is transmitted to the rotating member 31, the working blade 40 remains stationary, and the engine maintains an idling operating state. are doing.

Next, when rotating the working blade 40, pull the cable (not shown) connected to the operating rod 11 and rotate the operating rod 11 in the direction of arrow A in FIGS. 2 and 4.
The bent portions 11a, 11a of the operating rod 11 press 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 rotates downward.
Move parallel.

Along with this, the clutch spring 35 expands, and the clutch plays 1 and 26 follow the pressure Shire River 6 while maintaining the engaged state with the retainer 24 and the thrust bearing 28, and move together to the talker, and first the clutch The lining 27a of the plate 26 separates from the lower surface of the bottom of the annular recess 2b of the fixed member 2, and after passing through the neutral state, the lining 27b of the clutch grate 26 comes into contact with the disc sprays 1 and 15 rotating together with the output shaft 4. It's true.

When the lining 27b comes into contact with the disk plates 1 and 15, the clutch plates 1 and 26 begin to rotate while slipping due to the rotation of the disk plates 1 and 15, resulting in a so-called half-clutch state.

At this time, the clutch plate 26 is engaged with the retainer 24 via the thrust bearing 28, so the clutch plate 26 is smoothly engaged with the retainer 24 through the thrust bearing 28.
The load on the output shaft 4, which rotates the disk plays 1 and 15, starting from one turn, is reduced.

Furthermore, when the clutch spring 35 expands with the contraction of the pressure spring 9 and the lining 27b is pressed against the disc plate 15, the rotational force of the clutch plays 1 and 26 increases accordingly, and then the pressure increases.
- When the plays 1 and 6 move further downward, the thrust bearing 28 provided in the retainer 24
The clutch plate 2 is separated by the pressure spring 9 and the engaged state is released, and a gap is created between the clutch plates 2 and 2 by the pressure spring 9.
6 is no longer applied upward, and clutch rule l-2
The braking force of 6 is released and a clutch force is generated, and the clutch plates 1 and 26 begin to rotate in a negative direction such that the disc plate is 1 and 15, and the clutch is engaged.

As a result, the power of the output shaft 4 is transmitted to the collar member 13, the disc plates 1 and 15, the clutch plates 1 and 26, and the convex portion 36.
, is transmitted to the rotating member 31 via the guide member 37, and rotates the working blade 40.

When the pull is released, the pressure plays 1 and 6 are caused by the pressure spring 9 to move as shown in Figure 1.
Pushed upward, the operating rod 11 rotates in the direction of arrow B in FIGS. 2 and 4 and pulls the retainer 24 upward.

As a result, the thrust bearing 28 and clutch plays 1 and 2
The gap between the thrust bearing 28 and the thrust bearing 28 is eliminated.
is engaged with clutch play 1 and 26, and clutch tip 1
/= Pull up 26 upwards.

Along with this, the clutch spring 35 is contracted and the lining 27b of the clutch plate 26 is
15, the connection between the clutch plate 26 and the disc grate 15 is cut off, and then, through a neutral state, the lining 27a is pressed against the lower surface of the bottom of the annular recess 2b of the fixed member 2, thereby braking the rotation of the rotating member 31. 1. Stop the rotation of the working blade 40. do.

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

As described above, according to the present invention, a slotted groove is formed in a cylindrical collar member, a key stopper is fitted to the collar member, and the no-lunge portion of the collar is inserted into the collar member. The key groove was formed by sandwiching and integrally fixing the disc plate 1 to the norange part and closing the slot groove from the outside of the collar part. Compared to a method in which a keyway is cut into the inside of a cylinder, machining can be performed accurately without pressurization errors or cutting residues, and machining is extremely easy, making it possible to reduce the cost of cutting the keyway. .

Moreover, the collar member that fixed this disc plate is keyed to the output shaft, leaving at least one key/groove.
Since we made it possible to rotate as one, this key and groove are
The oil leaking from the engine is discharged from the exhaust passage without flowing into the working surface of the pressure plate 1, and the clutch connection can be ensured. ing.

In addition, if the tip of the key stopper is fitted so that it protrudes beyond the tip of a collar or one member, or if the tip of the key stopper is shaped like a trumpet, it will serve as a guide for oil, etc. that falls or is scattered due to the rotation of the output shaft, and the oil will be more reliably oiled. etc. can be discharged from the discharge channel.

[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 perspective view showing another embodiment of the collar member, key stopper, and adjustment bolt stopper. 1 is the engine mounting, 2 is the fixing member, 4 is the output shaft, 6 is the pressure plate, 13 is the collar member,
13a is the long cylindrical part, 13b is the flange part, 13
c is the short cylindrical part, 13e is the internal thread, 14 is the slotted groove,
15 is a disc play 1-116 is Keith [Tsuba-
16a is the flange part, 16b is the tip, 19
is an adjustment bolt.

Claims (1)

[Scope of Claims] 1 A cylindrical key stopper having a cylindrical collar member having a flange portion approximately in the middle, a plurality of slotted grooves extending from one end along the four axis directions from one end to the flange portion. is fitted into the collar member, and the disc brake -1 is sandwiched between the flange portion of the key stopper and the flange portion of the collar member and fixed together, and the slot groove is inserted into the key groove. The collar member is keyed to one output shaft connected to the engine, leaving at least one keyway.
-1 A mounting structure for a disc plate in a friction clutch, characterized in that the unused keyway is used as a discharge path for oil, etc. 2. A mounting structure for a disk plate in a friction clutch according to claim 1, wherein the tip of the key I/flange is formed into a trumpet shape.