JPS6196223A - Take-out device for normal rotation output of clutch mechanism - Google Patents

Abstract

PURPOSE:To ensure a compact-size normally rotating power source by fixing a pulley for taking out normal rotation output in the interior of a ring of a connecting disc in a clutch mechanism. CONSTITUTION:A connecting disc 20 of a clutch mechanism 10 comprises an upper disc 20a forming a lower interrupt portion and an upper disc 20b forming a control portion 32, which are coupled to each other by a ring 23. A pulley 38 for taking out normal rotation is disposed in the interior of the ring. Thus, even if a lot of parts, a cutting blade 11, a bowl-like disc 13, a coupling disc 16, a driving disc 12 and so on are superposed, incorporated and assembled, and all of these are not normally rotating members, it is not necessary to provide space especially, and a compact-size normally rotating power source is ensured skillfully.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention provides a clutch mechanism that includes a lower disk and an upper disk to form a power intermittent section that receives power from a drive shaft and a control section that controls this intermittent operation. The present invention relates to a constant rotation output extraction device that can constantly extract power from a drive shaft to the outside.

(B) Prior Art Conventionally, some clutch mechanisms have been constructed of a power intermittent section that connects power on the driving side to the driven side, and a control section that controls this.

Among these, the power intermittent section is one in which the power is interrupted by moving a coupling board connected to the output means in the direction of the drive shaft and press-contacting it with the drive board fixed to the drive shaft. In addition, as a control unit, two discs consisting of a coupling board and a command board are pressed into contact with each other with an uneven surface, and by rotating one disc (command board) at a certain angle, the other disc is controlled. Some devices move a disk (coupling @) toward this command panel, thereby controlling the movement of the coupling disk in the drive shaft direction.

(c) Problems to be Solved by the Invention However, when such a configuration is adopted, it is normal for these clutch mechanisms to have many parts assembled in a narrow space, and in such a case,
Even if we tried to extract constant rotational power externally, it was quite a difficult problem. In particular, the clutch mechanism, despite its function, is not a constantly rotating member.
There are considerable restrictions on extracting constantly rotating power from these.

In addition, it is necessary to constantly extract rotational power from these clutch mechanisms when a constantly rotating power source is required downstream of these clutch mechanisms, and such a configuration is often found in various transmission configurations. By the way.

(d) Means for solving the problems Therefore, 2 This invention solves the above-mentioned problems by taking the following measures.

In other words, both are joint discs in which a lower disc and an upper disc arranged around a drive shaft are connected by a ring.
The lower disk moves a certain amount in the axial direction of the drive shaft, and the upper disk has a power intermittent part that cuts and cuts power from the drive shaft to a transmission part loosely fitted on the outer periphery of the drive shaft. In the clutch mechanism constituting the control section for controlling the angle rotation and the movement of the lower disk, the clutch mechanism is characterized in that a pulley for taking out rotational output during lightning is fixed inside the ring of the coupling disk.

(e) Effect This allows many parts to be assembled in a narrow space,
Moreover, due to its nature, even if not all of the pulleys rotate all the time, a pulley that rotates constantly can be provided without increasing the space.

(F) Example Hereinafter, a case where an example of the present invention is applied to a lawn mower mainly used for mowing lawns in home gardens will be explained with reference to the drawings. FIG. 2 is a partially sectional plan view, FIG. 3 is a sectional view taken along ■--■ in FIG. 1, and FIGS. 4 and 5 are IV-TV and V- in FIG. 2.
The V sectional view, Figures 6 and 7 are the current example of mowing and a plan view.

First, let me explain the overall structure of the mower.

The mower has a disc-shaped casing 3 equipped with front wheels 1, 1 and rear wheels 2, 2, and an engine 4 is mounted on the center of the upper surface of the casing 3.

By the way, this casing 3 is disc-shaped as described above, but it also has a spiral-shaped raised part along its outer peripheral edge, which can be cut into a hollow space. In addition to creating a release path 5 for the grass that was taken,
The rear end of this discharge passage 5 is opened and serves as a discharge port 6. A catch bag 7 is connected to the rear of the outlet 6 so that the grass released from the outlet 6 can be collected therein.

In addition to a handle 8 extending rearward from the rear of the casing 3, the handle 8 is also equipped with various levers for operation as described later.

Next, we will explain the power transmission structure for the reaping section and the traveling section. First, in the reaping section, 1. This is 2. A drive shaft 9 connected to the engine 4 protrudes perpendicularly into the casing 3. The power of the drive shaft 9 is transmitted via a clutch mechanism 10 to a cutter knife-shaped cutting blade 11 fixed to its lower end.

That is, a drive plate 12 is fitted and fixed to the drive shaft 9, and a bearing 67 is fitted and fixed to the lower end of the drive shaft 9 by a bolt 66 screwed into the shaft end. Attach the mounting disk 68. And this Tori (=J
The disk 68 has a bowl-shaped disk 13 on its upper surface and a cutting blade 11 fitted in a cutting blade attachment device 15 on its lower surface, each having a plurality of poles 1-69. It is attached via a nut 70.

On the other hand, directly below the drive board 12, the connection board 16 is connected to the spring 1.
7 is always provided in a press-operated manner on this drive z 12. Note that a pin 18 is installed in the bowl-shaped disk 13, and it protrudes into the connecting plate 16, so even if the connecting plate is moved downward for 16 months, the connecting plate 16 and the bowl-shaped disk 1 will not be connected.
3 is torque-coupled.

The upward movement of the coupling board 16 by the spring 17 causes the sliding part 19 of the upper surface 61 to come into contact with the contact part 21 at the bottom of the lower opening M20a of the coupling board 20, which is also installed around the drive shaft 9. Furthermore, the upper disk 20b of the coupling board 20 itself is in contact with the command board 22 loosely fitted to the drive shaft 9 via the ball 29, and its upward movement is prevented.
It is configured to be impossible all the time.

By the way, this lower circle 'la 20 a and the upper circle 120
b is a considerably wide ring 2 provided around the drive shaft 9;
Connected by 3.

Note that the coupling plate 20 is configured to be able to move only up and down without rotating relative to the drive shaft 9 due to the rotation prevention and vertical movement guide structure described below.

That is, several guide holes 24... are formed near the outer peripheral end of the upper circle W20b of the coupling S20, and these guide holes 24...
The mounting bolt 25 is fitted into the mounting bolt 25 so that it can slide up and down. Further, a spring 26 is interposed between the coupling plate 20 and the casing 3, and the coupling plate 22 is always elastically biased upward.

By the way, one end of the wire 27 is connected to the command panel 22, and the other end is connected to the mower blade lever 28 provided on the handle 8, so when the mower lever 28 is moved back and forth, the command The board 22 is rotated at a constant angle with respect to the drive Φ1119. Then, the outer circumference item 1 of the command panel 22
In the near future, two balls 29 are held at several positions from the center of the drive shaft 9, and balls 29 are held at positions on the coupling plate 20 corresponding to these positions. Since the chestnut grooves 30... are formed, when the command board 22 is rotated, the balls 29... and the grooves 30...
Due to this action, the connecting plate 22 is lifted up, allowing the connecting plate 16 to float, and finally the contact portion 21 of the connecting plate 20 and the sliding portion 19 of the connecting plate 16 are separated! 'i! In addition to rubbing,
The connection plate 16 and the drive plate 12 are in a pressed state, and the power of the drive shaft 9 is transmitted to the cutting blade 11 and the like.

This is the clutch mechanism 10 described above, but furthermore, 1. ■ Classified in this way, this clutch mechanism 10 is
A power intermittent unit 31 consisting of the drive board 12, connection board 16, etc. described above, a connection board 20, command S22, etc.
The control unit 32 is composed of one control unit 32. In addition, in this configuration, when the clutch is disengaged (when the drive plate 12 and the connection @ 16 are separated), the lower disk of the coupling plate 20 moves up and down but does not rotate, as described above. The contact portion 21 of 20a is in elastic contact with the sliding portion 19 on the upper surface of the connecting board 16 which is integrated with the cutting blade 11 etc. which is the output means, so that the cutting blade 11
This means that other brake mechanisms are also used.

Incidentally, the engine 4 is fixed by the bolts 25 so as to be suspended from the upper surface of the casing 3 by a certain distance, but at this time, spacer bolts 33 are installed on the upper surface of the casing 3.

By placing the bottom surface of the engine 4 on the heads of the spacer bolts 33, this gap can be maintained even more reliably. At this time, the spacer portions of the spacer bolts 33 only exist as intervening members.

This can also be used to securely support the return springs 34 of the command panel 22 (9 return springs 34, etc.).

That is, in addition to winding the coil part of the coil spring-like return spring 34, which is fixed to the coupling board 20 etc., around the spacer bolt 33, other α11. i is locked to a bottle 35 installed on the command panel 22.

As a result, when the mower blade lever 28 is not fully engaged, the command panel 22 always returns to its original position by the action of the return springs 34.

By the way, at this time, if the part of the coupling board 20 into which the bottle 35 is inserted is formed into a long hole 36, and the rotation angle of the command board 22 is set so that the bottle 35 hits the end of the long hole 36, At this time, it will be a suitable positioning tool.

Furthermore, if the upper surface of the casing 3, which corresponds to the back surface of the engine 4, is opened appropriately, this opening 37 will communicate with the outside, and will serve as an inlet for air to be sucked in by the fan 14 described above.

Next, regarding power transmission to the traveling part, this is configured as a constantly rotating extraction device as described below.

That is, a boo IJ 38 for power extraction is fixed to the drive shaft 9, and a pulley 40 is also fixed to the transmission shaft 39 vertically provided near the rear wheels 2, 2, and both 38 .40 are connected with a belt 41.

In order to allow this heald 41 to be hung, a notch 71 must be provided in the ring 23 in the extending direction over the hanging angle of the belt 41. Further, since the width of the pulley 40 is biased toward the narrow side by the spring 42, the tension pulley 44 installed on the tension arm 43 installed in the middle is rotated around its central axis 45. If the belt 41 is oscillated and the tension of the belt 41 is adjusted, this becomes a speed change mechanism. Of course, the swinging of the tension arm 43 can also be remotely controlled with one hand, since one end of the wire 46 is connected to it and the other end is connected to a speed change lever 47 provided on the handle 8.

By the way, the power transmitted to the transmission shaft 39 is transmitted to the rear wheels 2.2 in a secondary manner.

The transmission shaft 39 is housed in the gearbox 48,
Inside this, a worm 49 is formed on the transmission shaft 39, and a worm wheel 51 that is loosely fitted to a rear axle 50 that passes horizontally through the gearbox 48 is meshed with the worm 49.

A spline tube 52 is firmly fitted to the rear axle 50 next to the worm wheel 51, and a clutch body 53 is fitted into the spline tube 52 so as to be slidable in the axial direction.

Further, since engaging pawls 54 and 55 are formed on the facing surfaces of the worm wheel 51 and the spline cylinder 52, respectively, the fork 56 is fitted into the clutch body 53, and the fork 56 is rotated around the fork shaft 57. By rotating, the power transmitted to the transmission shaft 39 is transferred to the rear axle 50.
It can be intermittent freely.

Note that the fork 56 is rotated by connecting one end of a wire 59 to an arm 58 fixed to a fork shaft 57, and connecting the other end to a travel lever 6o also mounted on the handle 8. The vehicle can be switched between traveling and stopping by tilting the vehicle (if the clutch body 53 is removed from the worm boiler 51, the traveling power is cut off and the vehicle becomes a one-hand push type).

Furthermore, the rear axle 5o protruding from the casing 3
A pinion gear 61 is fixedly installed at one end, and an internal gear 62 formed on the inner circumference of the rear wheel 2 is in contact with this pinion gear 61, so that the power finally transmitted to the rear axle 50 is It is transmitted to rings 2 and 2.

Note that the central axis 63° 63 located at the center of the rear wheels 2, 2 is located at the boss 64, 64 of the casing 3 from which the rear axle 50 protrudes.
By rotating and fixing this arm 65.65 to an appropriate position, the distance between the ground and the bottom of the casing 3 can be changed, that is, the mowing The height can be adjusted (
Along with this, the front wheels 1, 1 also have a similar configuration).

As a result of the above, if you want to cut grass, the mowing blade lever 2
8 to the connection side, the cutting blade 11 rotates to cut grass, and at the same time, the fan 14 also rotates to guide the cut grass from the discharge port 6 to the cassock 7 through the discharge passage 5. At this time, if the travel lever 60 is also operated to the connection side, the power from the drive shaft 9 is also transmitted to the rear axle 50, and the two mowers move forward in a self-propelled manner. Furthermore, if the travel lever 60 is operated to the disconnecting side, the power connection between the rear axle 50 and the worm wheel 51 is cut off, so that not only the travel can be stopped, but also forward and backward movement using three manual pushes is possible.

(g) Effects of the invention As described above, this invention provides that the coupling plate 20 is connected to the clutch mechanism 1.
It consists of a lower disk 20a that constitutes the power interrupting section 31 and an upper disk 20b that constitutes the control section 32, and focusing on the fact that these are connected by a ring 23, a pulley 38 for constantly rotating and taking out is installed inside this disk. Because it is installed in a small space, many parts, namely the cutting blade 11. Bowl-shaped disk 13. Connection board 16. Even if the drive panel 12, the joint 20, the command panel 22, etc. are stacked, built-in, and tightly assembled, and even if all of these are not constantly rotating members, a special space is required. Without,
They were able to cleverly secure a compact, constantly rotating power source.

In addition, if the power for constant recirculation is extracted from the clutch mechanism 10 and used for driving the mower, even if the clutch mechanism 10 intermittents the drive to the cutting blade 11, the power for driving the mower will be reduced. Since the clutch mechanism 10 remains connected, that is, the traveling drive is not simultaneously connected and disconnected by the clutch mechanism 10, so it can be driven separately from the drive of the cutting blade 11, and an excessive load can be prevented from being applied to the engine 4. There is.

[Brief explanation of drawings]

The drawings show the case where the present invention is applied to a lawn mower, in which FIG. 1 is a longitudinal sectional view of the main parts of the lawn mower, FIG. 2 is a partially sectional plan view of the same, and FIG. FIGS. 4 and 5 are IV-IV and V-V sectional views of FIG. 2, and FIGS. 6 and 7 are a side view and a plan view of the mower. (Symbol) 9... Drive shaft 10... Clutch mechanism 20... Connection plate 20a - Lower disk 20b... Two-part disk 23... Ring 31... Power intermittent part 32... Control part 38... Pulley

Claims (1)

[Claims] In both cases, the lower disk (20
a) and an upper disk (20b) connected by a ring (23), of which the lower disk (20
a) moves a certain amount in the axial direction of the drive shaft (9);
The upper disc (20b) rotates at a certain angle, and the upper disc (20b) rotates at a certain angle to connect the lower disc (
In the clutch mechanisms (10) each forming a control unit (32) that controls the movement of the coupling plate (20a),
0) A constant rotation output output device for a clutch mechanism, characterized in that a pulley (38) for constant rotation output output is fixed inside the ring (23).