JPS6224402Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a rotary tillage device that is installed on the tractor body so that it can be raised and lowered.Specifically, it can be used to perform tillage operations by arbitrarily changing and adjusting the relative position in the width direction with respect to the tractor body. This invention relates to a rotary tillage device configured to.

When plowing areas near the edge of a ridge or other obstacles with a rotary tillage device attached to the tractor body, the rotary tillage device should be properly protruded from the side of the tractor body facing the ridge or obstacle. It is preferable to operate the tractor in such a way that it does not leave uncultivated land, does not damage the ridge with the tractor body, and does not cause accidents in which the tractor body comes into contact with obstacles.

For this reason, rotary tillers have traditionally been equipped with equipment that allows the position of the rotary tiller to be changed from side to side with respect to the tractor body, but most of the existing rotary tillers are connected by attaching the rotary tiller to the tractor body. The mechanism and the drive shaft that transmits power to the rotary tiller are configured so that they can swing in an arc in the left and right directions around a fulcrum when viewed from above, and this swing allows the rotary tiller to be moved left and right when necessary. Allows you to change position.
According to the structure, a relatively large space must be secured between the tractor body and the rotary tiller in order to allow the coupling mechanism and drive shaft to be bent easily, and this results in a long overall body length. However, there are disadvantages in that the minimum turning radius increases and the headland area increases.

Therefore, in order to be able to change the left and right position of the rotary tiller without increasing the length of the machine, the frame of the rotary tiller is attached to the main frame, which is attached to the tractor body in an interlocking state, and the main frame is attached to the left and right sides of the main frame. It consists of a movable frame body equipped to allow relative movement, and the movable frame body alone is moved in a straight line in the left and right direction without moving the main frame to change the left and right position of the rotary tiller with respect to the tractor body. Things are starting to get done.

However, with this configuration, although the rotary tillage device does not swing in an arc, the entire device frame is not assembled as one piece, which creates another drawback in that it lacks solidity, and the main beam A problem arises in that it is difficult for the moving frame to move smoothly due to twisting or the like.

Although the present invention is a rotary tiller equipped with a movable frame so that it can move left and right relative to the main frame, the frame of the device is extremely strong, and the movable frame is free from twisting. To provide a rotary tillage device that operates smoothly without twisting.

In other words, in the rotary tilling section, which is constructed by assembling a movable frame body so as to be relatively movable in the left and right directions on a main beam that is attached to the tractor body side in an interlocking manner, the movable frame body is directed rearward from both upper left and right ends. Connecting plates 39 and 40 are extended between the connecting plates 39 and 40, and these connecting plates are connected and reinforced with a fixing member 45, and the left and right hollows of the main beam MB are installed at the portions located outward from the center of the left and right half of the rotary tillage device. The fixing member 45 is pivotally supported so as not to impede left and right movement by rotation prevention connecting bodies 46 and 46 extending rearward from the cylinders 10 and 11, respectively, and the left and right half portions of the rotary tillage device are The present invention is characterized in that the left and right hollow cylinders are provided with mounting portions for attaching to the tractor body inwardly from the center.

A specific example shown in the drawings will be described in detail below.

Figures 1 and 2 show the rotary tillage device R according to the present invention installed on a tractor body T, with Figure 1 showing its side view and Figure 2 showing its plan view. As is known, this equipment means is a three-point link mechanism TP consisting of a top link 1, a lower link 2, a lift arm 3, a leveling crank 4, etc. extending from the tractor body T side, and a rotary tiller R. The rotary tiller R on the connected side is configured as follows in the present invention.

An input bevel case 5 located in the upper center of the front part rotatably supports a vertical input shaft 6 and a passive shaft 7 orthogonal thereto via bearings.
The two shafts are interlocked and connected by bevel gears 8 and 9 that mesh with each other, and hollow cylindrical bodies 10 and 1 of the required length are provided on the left and right sides of the input bevel case 5, respectively.
1 and configure it as the main beam MB.

One of the hollow cylindrical bodies 10 and 11 is formed of an attachment body 10a to the bevel case, a support member 10b, and a pipe 10c connecting these, and the other cylindrical body 11 is an attachment body to the bevel case. 1
1a and 11b, a support member 11c, a mounting body 11b, and a pipe portion 11f that connects the support member 11c.

This main beam MB has a mounting section 1.
2, 12 and 13 are provided, and these are 3
It is attached to the tractor body T by connecting it to the lower link 2 and top link 1 of the point link mechanism TP, and when this is attached, the input shaft 6 of the input bevel case 5 is connected to the tractor body T via the universal joint 14. It is interlocked and connected to the PTO shaft on the side.

The extending cylinder part 16 at the upper end of the transmission casing 15 is fitted into one hollow cylinder body 10 of the main beam MB so that it can at least slide. To do this, a rotating shaft 18 supporting a sprocket wheel 17 is protruded within the transmission casing 15,
This is interlocked and connected to the passive shaft 7 concentrically protruding from the input bevel case 5 by a transmission joint 19 so that it can rotate integrally and can slide in the axial direction.

One end of a rotary pawl shaft 20 is rotatably supported at the lower end of the transmission casing 15, and the aforementioned sprocket wheel 1 is mounted inside the casing 15.
A passive sprocket wheel 21 corresponding to No. 7 is fitted, and a chain 22 is wound around both sprocket wheels 17 and 21 to interlock and connect them.

The other end of the rotary claw shaft 20 is rotatably supported by a bracket 24 attached to the lower end of the support 23, and the upper end of the support 23 is provided with a slide tube 25 that protrudes toward the input bevel case side. It will be done.

The slide tube 25 is the main beam MB mentioned above.
It is fitted into the inner diameter of the hollow cylindrical body 11 and is attached so as to be able to slide at least in the axial direction, and has a hydraulic expansion/contraction mechanism 26 built therein.

Details of the installation of the hydraulic expansion/contraction mechanism 26 are shown in FIG. 5 in an enlarged manner.

That is, the oil passage plate 28, which is integrally attached to the inner end of the hydraulic cylinder 27, is fitted into the inner diameter of the attachment body 11b of the main beam MB, and is sandwiched between the end faces of the attachment body 11a and the pipe 11f.
The hydraulic cylinder 2 is held by screwing the sockets 31 and 32 for connecting the oil pipes from the outside of the mounting body 11b while communicating with the oil passages 29 and 30.
The outer end of the piston rod 33 fitted in the piston rod 7 is pivotally attached to a bracket 34 extending from the support 23 with a pivot pin 35.

In addition, the drawing code 3 in this hydraulic expansion and contraction mechanism section
6 and 37 are oil chambers in the cylinder 27, and 38 are oil chambers 3
The oil passage pipe to the 7 side is shown.

Connecting plates 39 and 40 that protrude rearward are extended from the transmission casing 15, the support body 23, and the upper inner part, respectively, and between these extending ends, supports 41 and 42 and bolts are connected. 43 and 44 are connected and integrated by a fixing member 45,
This fixing member 45 is held by rotation prevention coupling bodies 46, 46 that fit together in a state where only movement in the axial direction is allowed, and each rotation prevention coupling body 46, 46 is connected to the cylindrical body of the main beam MB. It will be extended from the 10th and 11th sections.

In addition, as the relative positions of the left and right rotation prevention connectors 46, 46 are particularly clear from FIG.
The fixing member 45 is supported at a portion located outward from the center of the left and right half of the rotary tillage device (the center between the input shaft 6 of the input bevel case and one end of the device). The attachment portions 12, 12 to the tractor body which are provided and attached to the above-mentioned main beam are provided with rotation prevention coupling bodies 46, 46.
On the contrary, it is installed in the part closer to the inside from the center of the left and right half of the width direction.

Further, a mounting cylindrical portion 47 is fitted and fixed to the center portion of the fixing member 45 in the left-right direction, and a depth gauge mechanism 48 is installed in the cylindrical portion 47. This depth gauge mechanism 48 has a front end portion of a depth frame 50 rotatably attached to arms 49, 49 extending from the mounting cylinder portion 47, a support device 52 for a depth gauge 51 is installed at the rear end portion, and a support device 52 for a depth gauge 51 is installed at the rear end portion. A depth adjusting screw mechanism 53 whose one end is connected to an appropriate location of the frame 50 is attached to the mounting cylinder portion 4.
It is formed by being supported by a holding member 54 extending from another part of 7.

In short, the transmission casing 15 and support body 23 that support the rotary pawl shaft 20 are connected to the upper connecting plate 3.
9 and 40 are connected by a fixing member 45, and the cylindrical parts 16 and 25 are inserted into the main beam MB while maintaining an interlocking state, so that they can be slid in the left and right direction. A depth gauge mechanism 48, a rotary cover 55, etc. are installed on this movable frame.

In addition, in the figure, 56 and 57 are chain tighteners in the casing, 58 is a protection plate at the bottom of the casing, and 59
6 is a drain device, 60 is a winding prevention mechanism for a bearing portion, 6
1, 62, 63 and 64, 65, 66 are oil seal rings, and 67, 68, 69, 70, 71 are fixing bolts.

Next, to explain the operation of the device of the present invention, the lifting and lowering operation of the rotary tillage device R is well known.
By operating the point linkage mechanism TP, the device R is lowered into the work execution position.

The power transmitted from the PTO shaft of the tractor body T to the input shaft 6 is transmitted to the passive shaft 7 through the meshing of the bevel gears 8 and 9, and further transmitted to the rotating shaft 18 connected by the transmission joint 19. , the axis 18
and a tilling claw 20a which is transmitted to the rotary claw shaft 20 by the sprocket wheels 17, 21 and chain 22 fitted to the rotary claw shaft 20, rotates the claw shaft, and implants the tilling claws as appropriate on the claw shaft. The group is rotated to plow the soil, and during normal plowing work, the hydraulic expansion and contraction mechanism 26 is not operated and the rotary claw shaft is held and fixed at the neutral position and rotates. It is.

Next, when performing so-called ridge tillage while moving the tractor body T along the edge of the field, for example, assuming that the ridge is on the right side of the machine body, the hydraulic switching valve mechanism (not shown) is activated. If you operate the oil passage 29 to communicate with the oil supply route and the oil passage 30 side to the return route,
The pressure oil is forced into the oil chamber 36 and moves the piston 33 to the right in the drawing while draining the oil in the other chamber 37. Therefore, the piston rod 33
is strongly moved to the right in the drawing by hydraulic pressure, and is moved and fixed at will until the right end surface of the piston comes into contact with the stopper on the cylinder side.

Along with this movement, the support body 23 connected to the piston rod 33 is both moved to the right, so the slide tube 25 slides on the hollow cylindrical body 11 and extends, and is connected to the support body 23. The fixing member 45 and the rotary claw shaft 20 are also moved in the same way.

Therefore, the fixing member 45 and the transmission casing 15 connected to the other end of the rotary claw shaft 20 are also moved to the right at the same time, and during this movement, the transmission joint is connected between the driven shaft 7 and the rotation shaft 18. The transmission state is maintained by the expansion and contraction of the portion 19, and the depth gauge mechanism 48 installed on the fixed member 45 side and the rotary cover 55 installed on the movable side also change their positions along with this movement. In other words, the rotary claw shaft 20, depth gauge mechanism 48, rotary cover 55, etc. integrally move to the right and change their relative positions with respect to the main beam MB consisting of the input bevel case 5 and the hollow cylindrical bodies 10 and 11. Since the tractor operates while protruding to the right with respect to the tractor body T, the work can be carried out safely without leaving any uncultivated land.

On the other hand, when working in areas where there is a ridge or the like on the left side of the tractor body T, the hydraulic switching valve mechanism is operated to connect the oil passage 30 to the oil supply route.
When the return path is connected to the oil passage 29 side, pressure oil is sent into the oil chamber 37, and this oil pressure moves the piston to the left in the figure. Fixing material 45, rotary claw shaft 20, transmission casing 15, depth gauge mechanism 4
8. The rotary cover 55 and the like are integrally slid to the left and protrude to the left side of the tractor body T, making it possible to perform tillage work.

As described above, the present invention does not change the left and right position of the device by swinging the coupling mechanism to the tractor body and the transmission drive shaft in an arc in plan view, but instead moves only the movable frame equipped with the rotary claw shaft from side to side. Since the position is changed by moving in a straight line, there is no need to secure space to allow the power transmission connection to bend easily, and the length of the machine can be shortened, making it easier to rotate.

Moreover, even though the rotary tillage device has a configuration in which the movable frame body is moved linearly from side to side, the movable frame body is connected as a whole with a fixing member 45 near the cylindrical parts 16 and 25 that are inserted into the main beam. Since it is constructed with a rectangular frame, the rigidity of the movable frame itself is extremely high, and when the movable frame is mounted and supported on the main beam side, it is necessary to move the movable frame outward from the center of the widthwise half of the rotary tillage device. Since the fixing member 45 is supported by the rotation prevention coupling bodies 46, 46 at the position, the rotation prevention coupling bodies 46, 46,
The connecting plates 39 and 40 connected by the fixing member 45 work together effectively against twisting, so that in the assembled state, the whole can be maintained firmly and properly without twisting, resulting in smooth operation. can.

Rotation of the movable frame body, which attempts to rotate about the center of the cylindrical parts 16 and 25 fitted in the left and right hollow cylindrical bodies 10 and 11 of the main beam, is prevented by a rotation prevention coupling body 46 near both ends of the fixed member 45. , 46, the support interval is long and strong, and the sliding fitting part between the main beam and the cylindrical part and the fitting part between the fixing member and the rotation prevention coupling body are in a state where there is no twisting. This ensures smooth sliding movement.

Furthermore, since the attachment parts 12, 12 extending from the left and right hollow cylinders of the main beam to the tractor body are installed inside the part to which the rotation prevention coupling bodies 46, 46 are connected, the tractor body The load applied to the main beam by mounting it on the fuselage is also supported by both sides, which has the advantage of making the device even more operational and strong.

[Brief explanation of the drawing]

The drawings illustrate specific examples of the present invention; Fig. 1 is a side view of a rotary tiller according to the invention mounted on a tractor body; Fig. 2 is a plan view thereof;
3 is an enlarged side view of the main parts of the device of the present invention, FIG. 4 is a cross-sectional developed plan view of FIG. 2, FIG. This figure is a further enlarged cross-sectional view of the transmission section shown in FIG. 4. R...Rotary tillage device, T...Tractor body, TP...3-point linkage mechanism, MB...Main beam, 5...Input bevel case, 6...Input shaft, 7
... Passive shaft, 10, 11 ... Hollow cylindrical body, 12,
13...Mounting part, 15...Transmission casing, 19
...Transmission joint, 20...Rotary claw shaft, 23...
Support body, 24... Bracket, 25... Slide tube, 26... Hydraulic expansion mechanism, 33... Piston rod, 39, 40... Connection plate, 41, 42... Support tool, 45... Fixing material, 46... ... Rotation prevention connection body, 48 ... Depth gauge mechanism, 55 ... Rotary cover.

Claims (1)

[Scope of utility model registration request] A cylindrical portion 1 located near the upper end of the movable frame supporting the rotary claw shaft 20 and protruding inwardly relative to each other.
6, 25 are extended left and right from the bevel case 5 at the center of the main beam MB to the left and right hollow cylinders 10, 11.
The movable frame side can be moved left and right with respect to the main beam by an operating mechanism interposed between the main beam side and the movable frame side. In the rotary tilling device, connecting plates 39 and 40 extend rearward from both upper left and right ends of the movable frame, and these connecting plates are connected and reinforced by a fixing member 45, and the left and right ends of the rotary tilling device are The horizontal movement is not obstructed by the rotation prevention coupling bodies 46, 46, which extend rearwardly from the left and right hollow cylinders 10, 11 of the main beam MB, respectively, at portions located outward from the center of the widthwise half. The fixing member 45 is pivotally supported, and the left and right hollow cylinders are located inward from the center of the left and right half of the rotary tillage device in the left and right width direction, and are provided with attachment parts to the tractor body. Rotary tillage equipment.