JPH0631402U - Nuts for mounting rotary tillers - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to easily fix a tilling pawl to a pawl holder closest to a bearing portion of a tilling pawl shaft of a rotary tiller by using a bolt and a nut. [Structure] In the tillage claw attachment part of the rotary tiller,
A grip 10b for assembling or a glass cutter 11 is integrally fixed to a nut 10 for fixing the tilling claw 4 to the claw holder 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a nut for attaching a tilling claw to a tilling claw shaft of a rotary tiller.

[0002]

[Prior art]

 Conventionally, rotary cultivators mounted on tractors and cultivators, etc. conventionally had nail holders radially projecting from the tiller claw shaft, and the tiller claws were inserted into the respective nail holders and fixed with bolts and nuts. . It is also possible to provide a glass cutter on the claw holder so that grass or the like does not wind around the tiller claw shaft. In this case, as shown in FIG. The cutter 9 was fitted on the outside of the claw holder 3 and fixed by the bolt 15 and the nut 16.

[0003]

[Problems to be solved by the device]

 In such a conventional technique, when mounting a tilling claw or a glass cutter on the claw holder, particularly when mounting the tilling claw on both sides of the rotary or the center drive type center side bearing part closest to the bearing part, the nut is used. The installation of was troublesome. In other words, since the outermost position of the rotary and both sides of the center drive type chain case do not allow residual plowing, the tillage claws are placed as close as possible to the chain case or side support, so the claw holder and chain case or side support It is very narrow and the gap is such that the nut can be pressed with your finger, and the work of inserting the nut from between and pressing it against the claw holder and tightening the bolt was very troublesome and difficult. Also, when installing the glass cutter, the glass cutter is configured separately, and it is tightened together with the tilling claw, so it is troublesome to install and there is a risk of loosening, so the glass cutter itself needs a rotation stop. Therefore, the shape becomes complicated.

[0004]

[Means for Solving the Problems]

 The problem to be solved by the present invention is as described above. Next, the means for solving the problem will be described. That is, in the cultivating claw mounting portion of the rotary cultivating device, the assembling handle is fixed to the nut for fixing the cultivating claw to the claw holder. Alternatively, a glass cutter is integrally attached to a nut or a bolt for fixing the tilling claw to the claw holder, and the glass cutter is also used as an assembling handle.

[0005]

[Action]

 With this configuration, when fixing the tilling claw to the claw holder near the bearing of the tilling claw, hold the assembly handle and align the step of the assembly handle with the claw holder. By doing so, the nut insertion hole of the claw holder and the nut part can be aligned and easily inserted, and the tilling claw can be easily fixed. In addition, the glass cutter can be easily attached to the nut or bolt without being separately attached, and the grass to be wound can be cut by rotating the tiller shaft.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a partial cross-sectional view of the rear part of the mounting part of the rotary tillage claw shaft, Fig. 2 is a front view of the nut with a handle for assembly, Fig. 3 is a side view of the same, and Fig. 4 is a handle that also serves as a glass cutter. Fig. 5 is a perspective view of the nut provided, Fig. 5 is a side sectional view of the claw holder part to which the same nut is fastened, Fig. 6 is a perspective view of a bolt provided with a handle that doubles as a glass cutter, and Fig. 7 is a claw holder part to which the same bolt is fastened. It is a side sectional view. In FIG. 1, a tilling claw shaft 2 is horizontally mounted between a side support 1 and a chain case, and claw holders 3, 3, ... Are welded radially on the tilling claw shaft 2 at predetermined intervals in the axial direction. .. are fixed, and the plowing claws 4, 4 ... Are inserted into the claw holders 3 ..., Bolt holes are opened at the bases of the respective plowing claws 4, 4 ,. It is fixed by the nut 6. One of the bolt insertion holes of the claw holder 3 is an insertion hole 3a slightly larger than the diameter of the screw portion, and the other is a hexagonal insertion hole 3b slightly larger than the bolt head. The bolt 5 or the nut 6 is inserted into the insertion hole 3b. Once inserted, it will not rotate with respect to the claw holder 3, and washers 7, 7, ... Are interposed between the nuts and bolts to prevent them from loosening.

When fixing the tilling claw 4 ′ to the outermost chain case on the tilling claw shaft 2 or the claw holder 3 ′ closest to the side support 1, the claw holder 3 ′ and the bearing portion A of the tilling claw 2 are fixed. Since the space (distance L) is small, it is fixed by the nut 10 with a handle of the present invention. That is, as shown in FIG. 2 and FIG. 3, the nut 10 with a handle is fitted with a notch corresponding to the outer shape of the nut part 10a at one end of an assembling handle 10b made of a plate slightly larger than the nut part 10a. Then, the nut 10a is welded and fixed at a right angle to the axial direction of the nut portion 10a, and the other end of the assembling handle 10b is slightly narrowed to provide step portions 10c and 10c, which are bent in a "dogleg" shape to form the nut portion 10a. The length from the step portion 10c to the step portion 10c is the same as the length from the insertion hole 3a to the tip of the claw holder 3 '.

With this configuration, the outermost tilling claw 4'is inserted into the claw holder 3 ', and the handle 10 for assembling the nut 10 with a handle is inserted into the insertion hole 3b' of the claw holder 3'from the outside. When the end of 10b is held by hand and aligned with the end of the claw holder 3 ', the nut portion 10a can be easily inserted into the insertion hole 3b', and when the bolt 5 is inserted from the inner insertion hole 3a '. Moreover, the holes can be aligned and the bolt 5 and the nut 10 can be easily tightened.

The nut with a handle can also be configured as shown in FIG. That is, instead of the handle 10b 'for assembling, the plate is bent into an L shape to form a glass cutter 11, and one side surface of the glass cutter 11 is welded and fixed to the front surface of the nut portion 10a', and the screw hole portion 11a is notched. So that the bolt 5 can penetrate. When the nut 10 'is assembled in the same manner as described above as shown in FIG. 5, the glass cutter 11 serves as a handle, and when the plowing claw shaft 1 is rotated, the grass or the like wound by the glass cutter 11 is cut. As shown in FIGS. 6 and 7, it is also possible to fix the glass cutter 11 to the bolt 5'side, and the grass can be cut in the same manner as above by fixing the tilling claw 4.

[0010]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. That is, since it is configured as in claim 1, it is possible to easily insert the nut portion into the hole of the claw holder by holding the assembling handle fixed to the nut, and further, the claw holder and the cultivating claw shaft support. It is possible to reduce the distance between the two, the outermost claw can be brought closer to the tillage claw shaft support, and it is possible to reduce the residual plow and reduce the width of the entire rotary.

Further, since it is configured as in claim 2, the structure of the glass cutter is simplified, it is not necessary to attach the glass cutter as a separate body, and the glass cutter can also be used as an assembly handle and is easily attached. It will be.

[Brief description of drawings]

FIG. 1 is a partial rear cross-sectional view of a mounting portion of a rotary plowing shaft of a rotary.

FIG. 2 is a front view of a nut provided with an assembly handle.

FIG. 3 is a side view of the same.

FIG. 4 is a perspective view of a nut provided with a handle that also serves as a glass cutter.

FIG. 5 is a side cross-sectional view of the claw holder portion to which the nut is similarly fastened.

FIG. 6 is a perspective view of a bolt provided with a handle that doubles as a glass cutter.

FIG. 7 is a side cross-sectional view of the claw holder portion to which the bolt is also fastened.

FIG. 8 is a side cross-sectional view of a claw holder portion equipped with a conventional glass cutter.

[Explanation of symbols]

 2 Tilling claw shaft 3 Claw holder 4 Tilling claw 5 Bolt 10 Nut with handle 10a Nut part 10b Handle for assembly 11 Class cutter

Claims (2)

[Scope of utility model registration request] 1. A rotary tilling claw mounting nut for a rotary tiller, wherein an assembling handle is fixed to a nut for fixing the tilling claw to a claw holder in a tilling claw mounting portion of the rotary tiller. 2. A cultivating claw mounting portion of a rotary cultivating device, wherein a glass cutter is integrally attached to a nut or a bolt for fixing the cultivating claw to a claw holder, and the glass cutter is also used as an assembly handle. A nut for mounting a rotary tillage claw.