JPH0740802B2 - Rotary cultivator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rotary cultivating device in which a rotary cover that covers a cultivating part rotates back and forth around an axis of a cultivating shaft.

[Prior Art] In some cases, the length of the tilling cover is easily adjusted and the tilling cover is of a rotating type in order to improve work efficiency. That is, the turning fulcrum of the tilling cover is aligned with the axis of the tilling shaft, and the cover is moved in the front-rear direction by turning the adjusting handle of the expansion / contraction device interposed between the machine frame on the rotary body side and the cover. Was configured into.

[Problems to be Solved by the Invention] In the case of such a cultivating device, the cultivating cover is configured to pass through and rotate in the space between the side case and the transmission case that supports both ends of the cultivating shaft. Therefore, when the cultivating shaft for extension was attached to the shaft end of the cultivating shaft to expand the cultivating width, the extended portion could not be covered with the rotary cover.

[Means for Solving Problems] The present invention has been proposed in view of the problems described above, and therefore, the following technical means has been taken. That is,
In a side-drive type rotary tiller 1 configured such that both ends of the tiller shaft 3 are supported by a transmission case 4 and side plates 5, a bearing metal 17 for rotatably mounting the tiller shaft 3 together with a rotary cover 12 is provided. A rotary cultivating device characterized in that the bearing metal 17 is integrally rotatably provided with a mounting seat 22 of a cover 21 for covering an extension shaft attached to the shaft end of the cultivating shaft 3. The configuration is as follows.

[Operation and Effect of the Invention] When a different tiller shaft is attached to the shaft end of the tiller shaft 3 in a cantilevered state in order to widen the working width, first, the mounting seat 22 provided on the bearing metal 17 is placed above the extension shaft. Cover to cover
21 is attached, and then the extension shaft is connected to the end of the tiller shaft 3. After the shaft is extended in this way, when the rotary cover 12 is rotationally adjusted around the axis of the tilling shaft 3, the auxiliary cover 21 is also rotated at the same time. Since it is not necessary to separately perform the rotation adjustment of and the rotation adjustment of the auxiliary cover 21 on the extension shaft side, the time required for the adjustment can be shortened and the work efficiency can be improved.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

First of all, from the structure, 1 is 3 at the rear of the tractor.
It is a side drive type rotary tiller which is vertically movable via a point link mechanism or the like. This rotary tiller 1 includes a tiller shaft 3 on which a plurality of tiller claws 2 are planted, a chain case 4 and side plates 5 located on both left and right sides of the tiller shaft 3 and supporting the tiller shaft 3, and rotational power from the tractor side. An input shaft 7, which is rotatably mounted to the front in a gear box 6 at the center in the lateral direction for receiving, a drive pinion gear 8 formed at the rear end of the input shaft 7, a bevel gear 9 meshing with the drive pinion gear 8, A bevel gear 9 is spline-coupled, and a transmission shaft 10 for transmitting power to the chain case 4 side, a machine frame to configure a gear box 6 and a chain case 4, and a gear box 6 and a side plate 5.
A hollow pipe-shaped connecting frame 11 for connecting with the rotary cover 12, a rotary cover 12 for covering the upper part of the tillage part, and the like.
As will be described later, 12 is configured to be rotatable around the axis of the tilling shaft 3.

FIG. 2 shows the shaft portion of the cultivating shaft 3 on the side plate 5 side. The concrete structure will be described.
This is a side plate metal that is integrally fixed by ...
A bush 16 is attached to the circular notch 15 formed in the hole 13, and a bearing metal 17 that supports one end of the tiller shaft 3 is rotatably attached to the bush 16. A side plate 19 integral with the rotary cover 12 is fixed to the flange 18 formed on the outer periphery of the bearing metal 17 by a bolt 20, while the side plate 5 is sandwiched between the side plate 19 and the side plate 19. Auxiliary rotary cover 21
A mounting metal 22 that constitutes a mounting seat for mounting is fixed to the bearing metal 17 by a fastening bolt 23. The auxiliary rotary cover 21 is attached with a bolt 52 to a metal
Fixed at 22. The mounting metal 22 not only constitutes the mounting portion of the auxiliary rotary cover 21, but also has a function of preventing the bearing metal 17 from coming off when mounting the auxiliary rotary cover 21.
Reference numeral 24 in the figure is a spline groove formed at the end of the cultivating shaft 3, and when an unillustrated extension claw is attached, the flange 25 is fitted into this spline groove 24 and fixed by a bolt 26. The flange 25 is provided with bolt insertion holes 27 on its circumference at appropriate intervals, and the flange on the extension claw side is united with this and is fastened by a bolt (not shown). On the other hand, a bearing metal 30 is fixed to the lower part on the side of the chain case 4, and a locking member 32 for pressing the shoulder portion of the bearing 31 is fixed to the bearing metal 30 inside the bearing metal 30 with a bolt 33 and a nut 34. Has been done. A bush 35 is provided on the outer circumferences of the bearing metal 30 and the locking member 32, and a rotary metal 36 for fixing the side plate 19 integral with the rotary cover 12 is rotatable on the bush 35. It is fitted. 37 is a bolt for fixing the side plate 19 to the rotating metal 36. In the figure, 38, 38 ... Are seals, 39 is a straw plate, 40 is an adjusting handle for adjusting the height of the gauge wheel 41, and 42 is a mast. Reference numeral 43 denotes a handle for rotating the rotary cover 12 in the front-rear direction, the upper portion of which is supported by a plate 44 on a lateral side portion of the mast 42, and the lower end of which obliquely extends upward from the upper portion of the rotary cover 12. It is attached to another plate 45. Reference numeral 46 denotes a rear cover pivotally attached to a rear portion of the rotary cover 12. Side covers 47, 47 are provided on both left and right sides of the rear cover 46 so as to overlap with the side plates 19, 19, and the rear cover 46 is attached to the front and rear. When swinging to, the side covers 47, 47 swing back and forth integrally with this. 48 is a hitch, and when the adjusting handle 40 is turned, the hitch 48 is rotated up and down about a fulcrum pin 51 of a plate 50 provided on a side portion of the gear box 6. In FIG. 2, reference numerals 53 and 54 are seals, 55 is a bearing, and 56 is a straw plate. Further, reference numerals 57 and 58 in FIGS. 3 and 4
Is a sprocket, 59 is a chain, 60 and 61 are bearings,
62 is a seal 63 is a lubrication port.

In the above example, for example, the gauge wheel 41 is used in the direction of decreasing the working depth.
When adjusting the height of, the adjustment handle 40 is rotated to push down the gauge wheel 41. Then, the cultivated part relatively rises and the plowing depth becomes shallow. Then, the handle 43 for rotating the rotary cover 12 provided on the side portion of the mast 42 is operated to rotate the rotary cover 12 clockwise in FIG. In this case, the rotary cover 12
Since the side plate 19 and the side cover 47 rotate around the axis of the cultivating shaft together with the side plate, the lateral side of the cultivating part is always covered, and the angle formed by the rear cover 46 and the ground surface. Is almost constant, so the soil leveling performance does not change.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an overall side view, FIG. 2 is a back cross-sectional view on the side plate side, and FIGS. 3 and 4 are cross-sectional views of essential parts. Explanation of code 1 …… Rotary tiller 2 …… Tilling pawl 3 …… Tilling shaft 4 …… Transmission case (chain case) 5 …… Side plate 12 …… Rotary cover 17 …… Bearing metal 21 …… Auxiliary rotary cover 22 ...... Mounting seat (mounting metal)

Claims (1)

[Claims] 1. A side-drive type rotary cultivating apparatus 1 constructed so that both ends of a cultivating shaft 3 are supported by a transmission case 4 and side plates 5, and a bearing metal 17 for rotatably mounting the cultivating shaft 3 thereon. Is configured to be rotatable integrally with the rotary cover 12, and the bearing metal 17 has a cover 21 for covering an extension shaft attached to the shaft end of the tiller shaft 3.
A rotary tiller, characterized in that a mounting seat (22) is constructed.