JPS599833Y2 - Cutter device blade position adjustment structure - Google Patents

Description

[Detailed description of the invention] The present invention is applicable to a disc-shaped cutter device in which a plurality of disc-shaped blades are fixed side by side in the axial direction of the cutter shaft, or a cylinder-type cutter device in which a drum-shaped blade is pivotally supported to the cutter shaft. The object of the present invention is to provide a structure for adjusting the position of blades such that the clearance between opposing blades or between a blade and a snapper in the direction of the blade axis can be adjusted with extremely high accuracy and easily.

The blade position adjustment structure of the cutter device of the present invention is such that the cutter shaft is slidably supported only in the axial direction by a first flange which is fixed to the device fixing part so as to be rotatable only around the axis of the cutter shaft. , characterized in that a second flange is screwed onto a threaded portion formed at the end of the cutter shaft, and a fixing structure is provided for removably fixing both flanges to each other. By releasing the fixation, the second flange can be screwed into the threaded part, so the cutter shaft can be adjusted in the axial direction with respect to the fixed part, at least for each pitch of the threaded part. Not only is the adjustment minute and accurate, but by fixing both flanges to each other with a fixture, the cutter shaft cannot rotate relative to the first flange, so the adjustment position is fixed during use. It is reliable and will not change, and furthermore, the adjustment work is extremely easy since it only requires attachment and detachment of the fixture and rotation of the second flange.

Next, embodiments of the present invention will be described.

First Embodiment (See FIGS. 1 and 2) A disk-shaped cutter used by being attached to the rear part of a threshing device will be explained as an example.

Reference numeral 1 denotes a fixed case that holds the first and second cutter shafts 2 and 3 side by side, and bosses 4, 5, 6. The second cutter shaft 3 is rotatably supported at 7, and the second cutter shaft 3 is supported so as not to be movable in the axial direction, and has one end protruding outward, and is connected to a transmission gear 8. An input pulley 9 is pivotally supported.

The first cutter shaft 2 has a hexagonal cross section, and is inserted into hexagonal holes 11 and 12 formed in bosses 4 and 5, which are rotatably held with respect to the case 1 via bearings 10. , are pivotally supported on bosses 4 and 5 so as to be slidable only in the direction of axis A.

One end of the first cutter shaft 2 also protrudes outward from the case 1 in order to fix a gear 13 that meshes with the transmission gear 8 fixed to the second shaft 3.

A first flange 14 for holding the gear 13 is formed on the boss 4 on the side of the protruding portion.

A threaded portion 16 is formed at the tip of this protruding portion, into which a second flange 15 that cooperates with the first flange 14 and clamps the gear 13 is screwed.

Moreover, these first and second flanges 14. 15 and the gear 13, each has three through holes 17..., 18... which are offset from the axis A by an equal distance and are spaced apart from each other at a constant interval around the axis A. . , 19 . . . and the through hole 17 in the first flange 14 is a screw hole.

By inserting bolts 20 into these through holes and screwing them together, the gear 13 is attached to the first and second flanges 14. 15, and both flanges 14.
15 are provided with a fixing structure 21 that detachably fixes them to each other.

22 is a lock nut.

23 is a spanner engaging portion of the second flange 15.

24. Reference numeral 25 denotes a disk-shaped blade fixed to both shafts respectively.

Incidentally, instead of the blade 24 of the low-speed first cutter shaft 2, a disk-shaped cutter with a protrusion may be used.

Reference numeral 27 denotes a spacer collar for regulating the interval between the blades 24, and each blade 24 is positioned and fixed on the shaft 2 by tightening the boss 5.

With this structure, the fixing structure 21 is released and the second
By screwing the flange 15, the threaded portion 16 can be
For each pitch, move the cutter shaft 2 along with the cutter 24 to the axis A.
It is arranged so that the displacement can be adjusted in the direction.

Second Embodiment (See Figure 3) A gear groove 26 is formed on the radial outer periphery of the second flange 15 to mesh with the gear 8 supported by the second shaft 3, and the 27th flange 15 is connected to the transmission gear. It is designed so that it can be directly attached to and detached from the first flange 14.

The rest is the same as the first embodiment. Note that the following modifications are possible in both of the above embodiments.

■ Through holes 17, 18. 19 may be one, two, or four or more.

(2) It is not necessary to insert the bolts 20 into all the through-holes, and it is also possible to provide only one bolt to be inserted into some of the through-holes, for example, in the case of three bolts.

■ Through hole 17, 1 of 17th flange 14 or gear 13
8 may be one, and the second flange 15 may have a plurality of through holes 19.

Furthermore, when the present invention is applied to the cutter shaft of a cylinder-type cutter, the relative position of the rotary blade to the fixed blade in the direction of the rotation axis can be adjusted accurately, and the fixed blade and rotary blade can There is a place where there is no counterpart at the end of the shaft in the axial direction, and it has become possible to eliminate the possibility of uncut wood being caught and piled up at this place and causing rotational resistance.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the blade position adjustment structure of the cutter device according to the present invention, FIG. 1 is a partially cutaway plan view showing the first embodiment, and FIG. 2 is a partially cutaway plan view showing the first embodiment. FIG. 3 is a partially cutaway plan view showing the second embodiment. 1... Device fixing part, 2... Cutter shaft, A... Axis line, 14... Lth flange, 15... Second Flange, 16...Threaded portion, 21...Fixed structure.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ The cutter shaft 2 is slidable only in the direction of the axis A on the first flange 14, which is fixed to the device fixing part 1 so that the cutter shaft 2 can only rotate freely around the axis A. support,
A second flange 15 is screwed onto the threaded portion 16 formed at the end of the cutter shaft 2, and both flanges 14, 15 are screwed together.
A blade position adjustment structure for a cutter device, characterized in that a fixing structure 21 for removably fixing the blades to each other is provided. ■ A plurality of through holes 17 and 19 of the same size are provided in each of the flanges 14 and 15 at a plurality of locations around the axis A at regular intervals and equidistant from the axis A, and the through holes 17 , 19 and screw the bolt 20 into the fixing structure 21.
A blade position adjustment structure for a cutter device according to claim 1 of the registered utility model claim.