JPH0110963Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention consists of a rotary case that is constructed by flange-joining the left and right halves of the case.
This invention relates to a tiller in which a hitch member for attachment to the machine and a tiller frame are arranged.

If the hitch member for mounting to the machine is connected to the joint flange at the front of the rotary case, and the front end of the tilling frame is connected to the joint flange at the rear of the rotary case by bolts, the hitch member cannot be subjected to external forces in the left-right direction. When this happens, stress concentrates on the bolted connection, making it weak in terms of strength. Therefore, in conventional tillers of this kind, the opposing part of the tilling frame, which extends from the front end of the tilling frame with a gate-shaped longitudinal section so as to insert the rotary case from both left and right sides, is used to connect the front and rear of the rotary case. In addition to connecting bolts to the flange, a hitch member was fixed between the front ends of the opposing extensions, but when this method was used, the tillage frame became complex in shape and structure, making it difficult to manufacture the tillage frame. However, the disadvantage was that it was disadvantageous and the cost was high.

The purpose of the present invention is to overcome these conventional drawbacks.

In the tiller according to the present invention, the hit member is fixed to the front end of a flat plate-like frame arranged on both left and right sides of the rotary case, and the front part of the tiller frame is attached to the rear part of the flat plate-like frame in the front-rear direction. This overlapped portion is fixed to the rotary case by tightening it together with a flange joining bolt that passes through a spacing retaining collar placed between the rotary case joining flange and the flat plate frame. Further, the rotary case is connected near the front end of the flat plate-like frame via a flange-joining bolt that passes through a space-maintaining collar disposed between the rotary case-joining flange and the flat plate-like frame. Further, the length of the collar is made longer than the distance between the outer surface of the joint flange and the outer surface of the rotary case, so that a distance is provided between the flat plate frame and the outer surface of the rotary case. It is characterized by being formed.

According to the characteristic configuration of the present invention, the tilling frame and the plate-like member corresponding to the conventional extension part are separated, so the shape and structure of the tilling frame can be easily manufactured and mass production is possible. It can be made into something simple. The external force acting on the hitch member in the left and right direction is received by the flange joining bolts on the front and rear of the rotary case via the flat plate frame, so the strength is strong. Furthermore, since a flat plate-like member is used and a gap is formed between the outer surface of the rotary case and the flat plate-like member via the collar, for example, the flat plate-like member can be shaped into the outer shape of the rotary case. When the plate-shaped member is formed into a suitable mold and attached to the outer surface of the rotary case, due to errors in the manufacturing process of the plate-shaped member, the concave part of the plate-shaped member for fitting the rotary case may be wider than the width of the rotary case in the front-rear direction. The rotary case is also formed slightly small, and only about half of the rotary case can fit into the sealing recess in the width direction of the case, and when the flange connection bolts are tightened, the bent corner of the rotary case is inserted through the plate-like member. As a result, the bent corners are pressed down from the outside and the joint flanges of the rotary case open in a V-shape, making it easy for oil to leak from the flange joints. It has the advantage of avoiding Moreover, although it is divided into a tillage frame and a plate-like member, these
Since they are fixed together to the rotary case via the flange joint bolts of the rotary case, there is no need for bolts or the number of bolts for attaching the tillage frame and plate-shaped members to the rotary case can be reduced, and installation by bolt tightening etc. You can reduce the amount of work involved.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In the transmission case 2 supporting the running wheel 1,
A frame 4 on which an engine 3 is mounted and a steering handle 5 are attached to constitute a machine A, and a tilling device B is towed and attached to this machine A to constitute a walking type cultivator.

The tilling device B is constructed by arranging a hitch member 8 for attachment to the main machine A and a tilling frame 9 before and after a rotary case 7 that supports a tilling rotary 6.

The rotary case 7 is constructed by flange-joining the left and right halves of the case parts 7A and 7B, and the tilling frame 9 includes a tilling cover 10.
A plowing depth adjustment wheel 11 is attached.

The means for attaching the hit member 8 and the tilling frame 9 to the rotary case 7 are a pair of left and right flat plate-like frames 12, 12 in a front-rear posture and provided so as to sandwich the rotary case 7 from both left and right sides thereof.
are configured such that both front and rear end portions thereof protrude from the rotary case 7 in the front and back direction, and the rear end portions of these plate frames 12, 12 and the front end portion of the tillage frame 9 are connected to the tillage frame 9. The rotary case 7 is in a superposed state where
The rotary case 7, specifically, the joining flanges 7a, 7b, are connected to the rotary case 7 via the flange joining bolts 13...
While the plate-like frames 12, 12 are fastened and fixed together,
This is a means for fixing near the front end of the frame to the joining flanges 7a, 7b via the flange joining bolt 13, and fixing the hitch member 8 between the front ends of the pair of plate-shaped frames 12, 12.

14 is a connection reinforcing bolt that connects the plate frames 12, 12 and the tilling frame 9;
... are the plate frames 12, 12 and the flange 7a,
7b, and this collar 15 is a spacing-maintaining collar interposed between the joining flanges 7a and 7b.
The distance between the outer surface of the rotary case 7 and the outer surface of the rotary case 7 is longer than that of the outer surface of the rotary case 7. Reference numeral 16 denotes a spacing retaining collar interposed between the plate frames 12, 12, which connects the rotary case joining flanges 7a, 7.
The length is the sum of the two thicknesses of the joining flanges 7a, 7b and the two collars 15, 15 disposed on both sides of b.

A notch 12A is formed in the plate-shaped frame 12 to allow the oil plug 17 and the shaft mounting bolt 18 to be screwed into the rotary case 7.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

Figure 1 is a side view, Figure 2 is an enlarged side view of the main parts,
FIG. 3 is an enlarged cross-sectional plan view of the main part. 7A, 7B... split case part, 7... rotary case, A... main unit, 8... mounting hitch member, 9... tilling frame, 12... flat plate frame, 13... bolt, 15...Color.

Claims (1)

[Scope of utility model registration request] In the tiller, a hitch member 8 for attaching to the machine A and a tillage frame 9 are arranged before and after the rotary case 7, which is constructed by flange-joining the left and right two-split case parts 7A and 7B. A hitch member 8 is fixed to the front end portions of the flat plate-like frames 12, 12 arranged on both the left and right sides of the rotary case 7, and the front part of the tilling frame 9 is attached to the rear of the flat plate-like frames 12, 12. A bolt for flange joining is partially overlapped in the direction, and the overlapping portion is passed through collars 15, 15 for maintaining the spacing disposed between the rotary case joining flanges 7a, 7b and the flat plate-like frames 12, 12. 13
are jointly tightened and fixed to the rotary case 7 via
Furthermore, the rotary case joining flange 7a,
It is fixed to the rotary case 7 via a flange joining bolt 13 that passes through spacing retaining collars 15, 15 disposed between the flat plate frame 7b and the flat plate-like frame 12, and further, the collars 15, 15,
15, 15 is made longer than the distance between the outer surface of the joint flanges 7a, 7b and the outer surface of the rotary case 7, so that there is a space between the flat plate frames 12, 12 and the outer surface of the rotary case 7. A tiller characterized by having a gap.