JPH11201249A - Transmission for granule delivery device and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission having a simple structure and used for a granule delivery device, etc., by enabling operation at hand for controlling a delivery amount of the granule and by eliminating the need for a large-scale device such as a gear transmission. SOLUTION: A counter shaft 1 is provided with a first sprocket 5 integrally rotating with the counter shaft 1, and a second sprocket 7 integrally rotating with the counter shaft 1 through an electromagnetic clutch 6. A rotation- controlling shaft 27 provided in parallel with the counter shaft 1 is provided with a low-speed sprocket 9 incorporating a one-way clutch 8 integrally rotating with the rotation-controlling shaft 27 and having a diameter larger than that of the first sprocket 5, and a high-speed sprocket 10 having a diameter smaller than that of the second sprocket 7. Chains 11 and 12 are suspended between the first sprocket 5 and the low-speed sprocket 9, and between the second sprocket 7 and the high-speed sprocket 10, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission device suitable for controlling the feed amount of granules and the like in a granule spreader used for spraying pesticides and fertilizers.

[0002]

2. Description of the Related Art Conventionally, a granule spraying machine used for spraying pesticides, fertilizers and the like is of a traveling vehicle type, and the amount of spraying is controlled by controlling the amount of the granules to be fed from a mounted granule storage hopper. By doing that. One example is shown in FIGS.

In FIG. 2, reference numeral 20 denotes a granule storage hopper,
Reference numeral 21 denotes a manual opening / closing shutter for opening and closing the granule feeding hole 22 to control the feeding of the granule 23, and reference numeral 24 denotes a granule feeding roll for accurately controlling the feeding of the granule 23 from the granule feeding hole 22. , 25 is a delivery roll housing that rotatably supports the granule delivery roll 24 therein and covers the periphery of the granule delivery hole 22, and 26 is a granule delivery pipe, which is connected to a blower pipe and a scatter pipe (not shown). Be communicated.

[0004] The granule dispensing apparatus S having the above-described structure is well known (Japanese Utility Model Laid-open No. 57-135212). For example, as shown in FIG. A roll body 29 having a plurality of grooves 28 and an adjusting roll 30 attached to the rotating shaft 27 and capable of adjusting the roll body 29 in the axial direction can be adjusted.
The adjusting roll 30 has a branch rod 31 extending toward the roll body 29 and adapted to the groove 28.

The adjusting roll 30 is provided with an appropriate metering means (not shown) for fixing the adjusting roll 30 at a predetermined position on the axis thereof with respect to the rotating shaft 27 or releasing the fixed state. Operationally connected.

According to the granule feeding device S, when the rotation shaft 27 rotates, the roll body 29 and the adjustment roll 30 rotate together. As a result, the granule 23 in the granule storage hopper 20 flows into the groove 28 of the roll body 29 by its own weight, and the roll body 29
Roll housing 25 by an equal amount with the rotation of
Side and further supplied via a granule delivery pipe 26 to a blower tube and a spraying tube (not shown) to be sprayed on the field.

According to the above configuration, the amount of the granule 23 to be fed is adjusted by sliding the adjusting roll 30 to adjust the opening amount (width in the axial direction) of the groove 28 of the roll body 29. This is done by: The opening / closing shutter 2
If the granule delivery hole 22 is completely closed in step 1, the granule 2
The feeding of No. 3 stops.

[0008]

As described above, the feeding amount of the granule 23 is adjusted. However, there is a certain limit in the adjustment width of the opening amount of the groove 28. Number of rotations (rotation speed) of the main body 29 and the adjustment roll 30
Is controlled, the adjustment range of the feeding amount of the granule 23 can be expanded.

The present invention relates to a rotary speed change device suitable for use in the granule feeding device S, specifically, the roll body 29 and the adjusting roll 30, and the like. An object of the present invention is to provide a transmission for a granule feeding device or the like which does not require a large-scale device such as a gear transmission and has a simple structure.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a countershaft having a first transmission wheel which rotates integrally with the countershaft and a second transmission wheel which is integrally rotated via a clutch. A low-speed transmission wheel and a high-speed transmission wheel having a built-in one-way clutch that rotates integrally with the rotation control shaft are provided on a rotation control shaft provided in parallel with the countershaft; An endless transmission member is wound and interposed between the transmission wheel and the low-speed transmission wheel and between the second transmission wheel and the high-speed transmission wheel, respectively, and preferably, the first transmission wheel is provided. Is smaller than the diameter of the second transmission wheel.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view showing an embodiment of a drive system of a transmission for a granule feeding device or the like according to the present invention, FIG. 2 is a longitudinal sectional view showing an example of a conventional granule feeding device, and FIG. FIG. 3 is a perspective view of a main part of FIG.

In FIG. 1, reference numeral 1 denotes a counter shaft provided in parallel with a rotation shaft 27 (hereinafter referred to as a "rotation control shaft 27") of the granule feeding device S.
At one end is a drive sprocket 3 which is rotated by a drive chain 2 suspended between a drive source (not shown).
Is fitted.

Further, an electromagnetic clutch 4 for input control is provided on the driving sprocket 3 of the countershaft 1, and the electromagnetic clutch 4 is operated by an input switch in a driver's seat (not shown). The rotation is transmitted to the counter shaft 1.

Further, the counter shaft 1 includes:
A sprocket 5 as a first transmission wheel that rotates integrally with the countershaft 1 and a sprocket 7 as a second transmission wheel that is rotated integrally with the countershaft 1 via a transmission electromagnetic clutch 6 are provided.

Next, the rotation control shaft 27 of the granule feeding device S is provided with a sprocket 9 as a low-speed transmission wheel having a built-in one-way clutch 8 which rotates integrally with the rotation control shaft 27; A sprocket 9 as a high-speed transmission wheel having a smaller diameter than the sprocket 9 and the second sprocket 7 is provided.

An endless transmission chain 11 and an acceleration chain 12 are suspended between the first sprocket 5 and the low-speed sprocket 9 and between the second sprocket 7 and the high-speed sprocket 10, respectively. Winding).

The first sprocket 5 and the second sprocket 7 may have the same diameter. However, in the embodiment shown in FIG.
The second sprocket 7 has a larger diameter.

According to the transmission such as the granule feeding device S having the above-described configuration, when the four-stroke internal combustion engine or the electric motor of the driving source is driven before the operation, the driving sprocket 3 is driven via the driving chain 2. Is rotated.

Next, at the start of the spraying operation, when the input control electromagnetic clutch 4 is turned on by the input switch, the countershaft 1 is rotated by the action of the electromagnetic clutch 4 and at the same time, the first sprocket 5 is turned on.
Is rotated. As a result, the deceleration chain 11
, The low speed sprocket 9 having the one-way clutch 8 built therein and the rotation control shaft 27 are integrally rotated.

Further, the roll body 29 and the adjusting roll 3 provided coaxially with the rotation control shaft 27 are provided.
0 is rotated, and the groove 28 of the roll body 29 is rotated.
A predetermined amount of the granules 23 is fed out and sprayed.

Next, when it is desired to increase the amount of the granule 23 to be sprayed, when the shift electromagnetic clutch 6 provided on the counter shaft 1 is turned on by a shift switch in the driver's seat, the second sprocket is turned on. 7 rotates integrally with the countershaft 1, and the speed-increasing chain 1
2, the high-speed sprocket 10 and the rotation control shaft 27 are rotated at high speed.

Further, the roll body 29 and the adjusting roll 3 provided coaxially with the rotation control shaft 27 are provided.
0 is rotated at a high speed, and a predetermined amount of the granule 23 in the groove 28 of the roll body 29 is fed out and dispersed.

At this time, the low-speed sprocket 9 is also rotated via the first sprocket 5 and the deceleration chain 11, but since the one-way clutch 8 is built in the low-speed sprocket 9, The rotation control shaft 27 by the high-speed sprocket 10
Does not hinder the high-speed rotation of the motor. Therefore, by the high-speed rotation of the rotation control shaft 27, the roll body 29 and the adjusting roll 30 are rotated at a high speed, and more granules 23 are fed out and dispersed.

As described above, the control of the amount of the fed granules can be performed by controlling the rotation of the rotation control shaft 27 by the electromagnetic clutch 6 for shifting, and a switch can be guided to the driver's hand to operate the switch. is there.

The first sprocket 5, the second sprocket 7, the low speed sprocket 9 and the high speed sprocket 10 are changed to V pulleys, and the chains 11 and 12 are changed to V belts to provide a belt tension clutch. You can also. In that case, a mechanical device such as a belt tension mechanism and an operation lever thereof is additionally required.

It is needless to say that the diameter ratio of the transmission wheels can be appropriately selected and used as needed.

[0027]

According to the present invention, it is possible to control the amount of granules to be fed by a hand switch or the like, so that a large-scale device such as a gear transmission is not required, and a simple structure for a granule feeding device can be used. A transmission can be provided.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of a drive system of a transmission for a granule feeding device and the like according to the present invention.

FIG. 2 is a longitudinal sectional view showing an example of a conventional granule feeding device.

FIG. 3 is a perspective view of a main part of FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 counter shaft 2 drive chain 3 drive sprocket 4 electromagnetic clutch 5 first sprocket 6 speed change electromagnetic clutch 7 second sprocket 8 one way clutch 9 low speed sprocket 10 high speed sprocket 11, 12 chain 27 rotation control shaft

Claims (2)

[Claims] A first transmission wheel (5) that rotates integrally with the countershaft (1).
And a second transmission wheel (7) which is integrally rotated via a clutch (6). A rotation control shaft (27) provided in parallel with the counter shaft (1) is provided with the rotation control shaft (27). 27), a low-speed transmission wheel (9) and a high-speed transmission wheel (10) incorporating a one-way clutch (8) that rotates integrally with the first transmission wheel (5) and the low-speed transmission wheel (10). 9) and an endless transmission member (11, 12) is wound and interposed between the second transmission wheel (7) and the high-speed transmission wheel (10), respectively. Transmission. 2. The transmission according to claim 1, wherein the diameter of the first transmission wheel (5) is smaller than the diameter of the second transmission wheel (7). .