JPH05215147A - Clutch device for moving vehicle - Google Patents

Abstract

PURPOSE:To reduce the weight of the whole mechanism in an engine vertical shaft drive type transmission mechanism, in the case of providing an engine at the uppermost part and providing a transmission mechanism under it, by providing a planetary gear type reducer at the uppermost part of the transmission mechanism, and using part of the members of the planetary gear type reducer as a main clutch. CONSTITUTION:A planetary gear 4 is engaged with the part of a drive gear 3 of a drive shaft 1 at facing shaft end parts of the drive shaft 1 and a driven shaft 2 provided coaxially facing each other, a carrier 5 is installed at a shaft end of the driven shaft 2, pivotally supporting the planetary gear 4, to rotate with play with the driven shaft 2, and a rotation stopper 6 is installed integrally in the rotating direction to be freely movable axially to the driven shaft 2 on the opposite side of the facing shaft end side of the carrier 5. A shaft pin 7 pivotally supporting the planetary gear 4 is protruded outside the carrier 5 on the side of the rotation stopper 6. A pressure spring 9 for pushing a cut part 8 of the rotation stopper 6 to this protruding part is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch device for a mobile vehicle.

[0002]

2. Description of the Related Art In the prior art, as shown in Japanese Utility Model Publication No. Sho 45-962, a large dedicated clutch is provided between a drive shaft and a driven shaft which are opposed to each other. .. Such a conventional type requires dedicated parts, resulting in high cost and heavy weight of the entire machine body.

[0003]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem of the conventional device, and has taken the following technical means. That is, the planetary gear 4 is engaged with the drive gear 3 of the drive shaft 1 at the opposite shaft ends of the drive shaft 1 and the driven shaft 2 provided so as to face each other coaxially, and the planetary gear 4 is provided at the shaft end of the driven shaft 2. A carrier 5 is attached to the driven shaft 2 in an idling manner by supporting the Lee gear 4, and a rotary locking member 6 is axially movable with respect to the driven shaft 2 on the side opposite to the opposite shaft end side of the carrier 5. A shaft pin 7 that is integrally mounted in the rotational direction and that supports the planetary gear 4
Is provided on the side of the rotary locking tool 6 so as to project outward from the carrier 5, and a pressing spring 9 that presses the notch 8 of the rotary locking tool 6 against the projecting portion.
And a clutch device for a moving vehicle.

[0004]

The present invention has the following technical effects with the above configuration. That is, rotation of the shaft pin 7 supporting the planetary gear 4, which is a part of the planetary gear type speed reducer provided between the drive shaft 1 and the driven shaft 2, around the driven shaft 2 causes the rotation locking member 6 to rotate. Since the notch 8 part easily serves as a clutch in a regulated state or a non-regulated state, the number of parts as a clutch member is reduced by using a part of the speed reducer, and a simple mechanical pawl clutch is provided. Therefore, it was possible to reduce the weight and cost.

[0005]

Embodiments of the present invention will be described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are as follows.
Unless otherwise specified, the scope of the present invention is not intended to be limited thereto and is merely an illustrative example.

In the illustrated example, the present invention is folded into an axle cultivator 10 which is a walking type mobile vehicle for agriculture. As shown in FIG. 1, FIG. 3, and FIG. 4, the axle cultivator 10 of the illustrated example has an engine 11 provided on the upper side, and a drive case of a drive shaft 1 which is a crankshaft of the engine 11 is attached to a lower side of a transmission case 12.
It is output to the outside from the output shaft 13 below the transmission case 12 via the internal gears.

The output shaft 13 is provided on the lower side of the transmission case 12 so as to project to both left and right sides, and a plurality of tillage claws 14 and 1 are provided at the projecting ends.
4. ． ． The cultivating pipe 15 to which is attached is detachably attached, and the output shaft 13 is driven and rotated to excavate the mud on the surface of the field. Further, one end of a handle support frame 16 is attached to the transmission case 12 which is a part of the main frame, and a handle pipe 17 having a clutch lever 18 is attached to the other end of the handle support frame 16.

The upper opening 19 of the transmission case 12 is shown in FIG.
As shown in FIG. 3, the upper opening 19 has a substantially circular shape, and an internal gear 20 provided with an internal gear is provided in the upper opening 19 from above, and a lower edge portion 21 of the engine 11 is assembled as a lid. Although not shown, the internal gear 20 is non-rotatably attached to the upper opening 19 of the transmission case 12.

At the central axis of the internal gear 20,
A drive shaft 1 of the engine 11 is provided so as to project downward, and three planetary gears 4, 4 ... Are provided between a drive gear 3 which is a sun gear of the drive shaft 1 and an internal gear of an internal gear 20. ． ． Is located so that it can be linked with the drive. A shaft pin 7 is provided on the shaft core of the planetary gear 4 so as to project downward.

In the transmission case 12 below the drive shaft 1, the driven shaft 2 is supported by bearings 22 and 22 so as to face the shaft center. A carrier 5 is attached to the upper end of the driven shaft 2 in a free-wheeling manner, and the carrier 5 has the above-mentioned shaft pins 7, 7. ．
Through planetary gears 4,4. ． Is also mounted in a free-wheeling manner.

A recess groove 24 is provided below the boss 23 for mounting the shaft pin 7 of the carrier 5, and the shaft pin 7 is non-rotatably fixed to the carrier 5 by a stop pin 25. In the illustrated example, the planetary gears 4, 4. ． The internal gear 20 and the carrier 5 are made of a resin material such as plastic or carbon to reduce the weight.

In this case, since the shaft pin 7 does not rotate, the wear of the mounting boss 23 can be prevented. Further, the recessed groove 24 has the same effect as a small hole for inserting the stop pin 25 into the hole of the shaft pin 7. As described above, the carrier 5 is attached to the upper end of the driven shaft 2.
However, by the thrust collars 26, 26 and the retaining ring 27, they are fixed in the axial direction and are attached in a rotational manner in the rotational direction, and the rotation locking tool 6 is disposed below the vicinity thereof.

The rotary lock 6 is spline-engaged with the driven shaft 2 so as to be movable in the axial direction and regulated in the rotation direction, and the vertical motion of the rotary lock 6 causes the rotary lock 6 to project downward from the carrier 5. Shaft pin 7, 7. ． The cutouts 8 engage with each other to transmit rotation, and the shaft pins 7, 7. ． It is a clutch member that separates from and stops the power transmission. Reference numeral 9 is a pressing spring, which moves the rotation engaging member 6 as a clutch member upward to the clutch connecting side.

As shown in FIGS. 1 and 2, claw pins 30 and 30 of the shifter 28 are engaged with the boss portion of the rotary engaging member 6 and project outside the transmission case 12 integrally with the shifter 28. When the rocking plate 32 attached to the shifter shaft 31 is moved, the rotation lock 6 can be operated externally. The oscillating plate 32, as shown in FIGS.
3 is pulled in the direction of the arrow "a".

The external tension spring 33 has a stronger load than the internal pressing spring 9, and the swing plate 32 is pulled in the direction of the arrow "a" whenever both springs are actuated, as shown in FIG. The clutch is released. As shown in FIGS. 2, 3 and 4, one end of the external tension spring 33 is attached to the machine frame side, and the other end of the spring is attached to the base end of the inner wire 34 of the operation cable. Reference numeral 35 is a mounting pin.

The other end of the external tension spring 33 serves as a locking portion 36 which is folded back toward the inside of the spring by a predetermined length. A long hole 37 is opened at the upper end of the rocking plate 32, and the locking portion 36 at the other end of the external tension spring 33 is engaged with the long hole 37. The end portion of the inner wire 34 is
It is attached to the clutch lever 18 provided on the handle pipe 17, and the outer peripheral portion of the inner wire 34 is covered with an outer wire 38.

Since both ends of the outer wire 38 are respectively fixed to the machine frame side, when the clutch lever 18 is moved in the direction of arrow "B", the base end of the inner wire 34 is fixed to the external tension spring 33. The other end is directly pulled via the mounting pin 35. The clutch lever 18 has a structure (not shown) that can be fixed at the pulling position,
The other end of the external tension spring 33 can be held while being pulled.

When operated in this manner, the load of the external tension spring 33 is killed, so that the rotary engaging member 6 is pushed up by the internal pressing spring 9 with a constant load, and the notch 8 is treated as the shaft pin 7. It will be in the clutch at that point. At this time,
Even when the inner wire 34 is not pulled by the movement amount of the shifter 28, the swing plate 32 swings to some extent by the elongated hole 37, so that there is no fear that the engagement dimension between the notch 8 and the shaft pin 7 becomes insufficient. ..

[Brief description of drawings]

 The figure shows an embodiment of the invention.

FIG. 1 is a side sectional view of a state where a main part clutch is engaged.

FIG. 2 is a plan view showing a partial cross section of a main part.

FIG. 3 is a side sectional view of a main part in a clutch disengaged state.

FIG. 4 is an overall side view.

[Explanation of symbols]

 1 Drive Shaft 2 Driven Shaft 3 Drive Gear 4 Planetary Gear 5 Carrier 6 Rotating Locking Tool 7 Axis Pin 8 Notch 9 Pressing Spring

Claims (1)

[Claims] 1. A planetary gear 4 meshes with a drive gear 3 part of a drive shaft 1 at the opposing shaft ends of a drive shaft 1 and a driven shaft 2 provided so as to face each other coaxially, and a shaft end of a driven shaft 2 is formed. A planetary gear 4 is pivotally supported on the driven shaft 2 and a carrier 5 is attached to the driven shaft 2 in a free-wheeling manner. A rotary locking member 6 is axially attached to the driven shaft 2 on the side opposite to the opposite shaft end side of the carrier 5. It is movable and integrally attached in the direction of rotation, and a shaft pin 7 that pivotally supports the planetary gear 4 is provided on the side of the rotation locking device 6 so as to project outward from the carrier 5, and the rotation locking is performed on this projection. A clutch device for a mobile vehicle, comprising a pressing spring 9 for pressing the notch 8 of the tool 6.