JPH0317636Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cutting length adjusting device for a grass straw cutter for cutting grass or rice straw to provide feed for livestock, etc.

BACKGROUND ART As shown in FIG. 3, a conventional straw cutter includes a main body 3 having a roll chamber 1 and a cutting chamber 2, a supply gutter 4 provided on the roll chamber 1 side of the main body 3, and a cutting chamber of the main body 3. It consists of a discharge gutter 5 provided on the second side and a machine stand 6 that supports the main body 3. The roll chamber 1 accommodates upper and lower feed rolls 7 and 8, and the cutting chamber 2 houses a rotating blade 9 and a fixed blade 1.
Contains 0.

The drive mechanism of this straw cutter is as follows. First, the rotation of the motor 11 is caused by the rotation of the motor pulley 1.
2 is transmitted via a V-belt 13 to a large pulley 15 on a rotating main shaft 14 that supports the rotating blade 9. Next, the signal is transmitted from the small pulley 16 on the rotating main shaft 14 via the V-belt 17 to the intermediate drive pulley 19 on the intermediate drive shaft 18 . Then, it is transmitted from the intermediate drive gear 20 on the intermediate drive shaft 18 to the lower feed roll gear 22 on the lower feed roll shaft 21 that meshes with the intermediate drive gear 20, and the lower feed roll 8 rotates. Further, the sprocket 23 on the lower feed roll shaft 21 is connected to the sprocket 2 on the intermediate support shaft 25 via the chain 24.
6. Then, it is transmitted from the gear 27 on the intermediate support shaft 25 to the upper feed roll gear 29 on the upper feed roll shaft 28 that meshes with the gear 27, and the upper feed roll 7 rotates. Note that the upper and lower feed rolls 7 and 8 are designed to rotate at the same speed. Further, the upper feed roll 7 is configured to move up and down in an arc shape around the intermediate support shaft 25 depending on the amount of material fed.

The cutting length of the material is determined by the rotational (feeding) speed of the upper and lower feed rolls 7 and 8. That is,
The rotational speed of the upper and lower feed rolls 7 and 8 is determined by appropriately combining several types of intermediate drive gears 20 and lower feed roll gears 22 prepared in advance, and changing the gear ratio to adjust the rotation speed of the intermediate drive shaft 18 and the lower feed roll shaft. 21, it is possible to adjust the speed change in stages.

Problems to be Solved by the Invention In the conventional straw cutter described above, in order to adjust the cutting length of the material, two gears, the intermediate drive gear 20 and the lower feed roll gear 22, must be replaced. However, there was a problem in that several types of gears had to be prepared.

The purpose of the present invention is to solve such conventional problems and provide a cutting length adjusting device for straw cutters that allows the cutting length to be adjusted very easily.

Means for Solving the Problems As a means for achieving the above object, the cutting length adjusting device for straw cutters of the present invention is as follows, as can be understood from FIGS. 1 and 2 showing an embodiment thereof. Several intermediate drive shafts 18 having different rotational speeds are provided on a circumference D of a predetermined radius R centered on the axis of the feed roll gear 22, and the intermediate drive shafts 1
8 is characterized in that one intermediate drive gear 20 that meshes with the lower feed roll gear 22 is fitted in a replaceable manner. The above predetermined radius R
is the lower feed roll gear 22 and the intermediate drive gear 20.
Corresponds to the center distance between

Operation By fitting one intermediate drive gear 20 to one of several intermediate drive shafts 18 each having a different rotation speed, a material can be cut to a desired length.

Embodiment An embodiment of the present invention will be specifically described with reference to FIGS. 1 and 2. In this figure, the reference numerals in FIG. 3 are used for the same members as in the conventional straw cutter.

Reference numeral 18 denotes intermediate drive shafts for rotating the lower feed roll 8, and two intermediate drive shafts are provided on a circumference D having a predetermined radius R centered on the axis of the lower feed roll gear 22. Of these, the first intermediate drive shaft 18a rotates by being transmitted from the rotating main shaft 14 shown in FIG. The second intermediate drive shaft 18b connects the chain 31 from the small sprocket 30 on the first intermediate drive shaft 18a.
The rotational speed is transmitted to the large sprocket 32 on the second intermediate drive shaft 18b for deceleration rotation.

Now, as shown in FIG.
When fitted onto the intermediate drive shaft 18a, the lower feed roll 8 rotates relatively quickly, so that the material is cut into long pieces. Also, as shown in Fig. 2, the intermediate drive gear 2
0 is fitted onto the second intermediate drive shaft 18b, the lower feed roll 8 rotates relatively slowly, so the material is cut into short pieces.

Effects of the invention Since the present invention has the configuration as described above, the desired cutting can be achieved extremely easily by simply replacing one intermediate drive gear 20 with any one of the plurality of intermediate drive shafts 18. Can be adjusted to length.

[Brief explanation of drawings]

1 and 2 are side views of essential parts showing an embodiment of the present invention, and FIG. 3 is an overall side view showing a conventional example. Explanation of drawing symbols, 1... Roll chamber, 2... Cutting chamber, 3... Main body, 4... Supply gutter, 5... Discharge gutter,
6... Machine base, 7, 8... Upper and lower feed rolls, 9...
...Rotating blade, 10...Fixed blade, 11...Motor, 1
2...Motor pulley, 13...V belt, 14...
...Rotating main shaft, 15...Large pulley, 16...Small pulley, 17...V belt, 18...Intermediate drive shaft, 1
8a...First intermediate drive shaft, 18b...Second intermediate drive shaft, 19...Intermediate drive pulley, 20...Intermediate drive gear, 21...Lower feed roll shaft, 22...Lower feed roll gear, 23 ... Sprocket, 24
...Chain, 25...Intermediate support shaft, 26...Sprocket, 27...Gear, 28...Upper feed roll shaft, 29...Roll gear, 30...Small sprocket, 31...Chain, 32...Large Sprocket, R...radius, D...circumference.

Claims (1)

[Scope of utility model registration request] Several intermediate drive shafts 18 having different rotational speeds are provided on a circumference D of a predetermined radius R centered on the axis of the lower feed roll gear 22.
The cutting length adjusting device for straw cutters is characterized in that one intermediate drive gear 20 that meshes with the lower feeding roll gear 22 is fitted in a replaceable manner.