JPH055441B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention rotates the direction of rotation of the tiller in the forward direction by changing the attachment direction of the tiller main body of the rotary tiller connected to the traction machine to the front and back, respectively. This invention relates to a forward/reverse rotation rotary tiller that is configured to be able to switch between a down cut mode, which is a rotation mode, and an up cut mode, which is a reverse rotation mode.

In order to drive the tiller body of the tiller, the front input shaft, which protrudes from the front and rear of the gearbox and is supported, is connected to the PTO shaft of the traction machine via a universal joint. Every time you change the mounting direction of the main body, you will have to connect or release the above-mentioned joint shaft and input shaft, and it is not easy to align the axes of the universal joint shaft and input shaft and connect them with a pin. Therefore, it is troublesome to perform such operations manually in the narrow space between the traction machine and the main body of the tilling device.

In addition, conventionally, a quick coupler frame was pivotally attached to the rear end of the three-point link hitch via a pin in the vehicle width direction, and it protruded rearward from the rear axle case.
The front end of the drive shaft was connected to the PTO shaft via a universal joint, and the support part of the universal joint at the rear end of the drive shaft was installed in the quick coupler frame.
-Disclosed in Publication No. 123207. However, in the method described in this publication, the tractor must be moved backward to unite both joints, so when the tractor moves backward, the working machine is pushed and moved backward. However,
It is extremely dangerous if the work equipment moves like this.

Therefore, when changing the mounting direction of the tilling device main body to the mounting frame and switching the rotation direction of the tilling body to forward or reverse rotation, it is desirable to easily and quickly perform the connection operation between the mounting machine frame and the tilling device main body. Therefore, a technical problem arises that must be solved in order to make it possible to do so, and the present invention aims to solve this problem by providing a mounting method for connecting a rotary tiller to a traction machine via a connecting mechanism. The tilling device body is divided into a machine frame and a tilling device body including a tilling body, and a joint portion is provided on an input shaft that projects and is pivotally supported in front and rear of a gear box of the tillage device body, respectively, to drive the tilling body.
Furthermore, the mounting frame supports an intermediate shaft that can be connected to the PTO shaft of the traction machine via a universal joint shaft, and the joint provided on this intermediate shaft is connected to the mounting frame when it is attached to the tiller body. The tiller is formed so that it can be connected to the joint of the input shaft when the tiller is installed, and by changing the mounting direction of the tiller main body to the attachment frame, the direction of rotation of the tiller can be changed to normal or reverse rotation. In the forward/reverse rotary cultivating device configured to be able to switch between forward and reverse rotations, the mounting frame is connected to a head equipped with a positioning mounting frame having left and right downward openings and a hitch pin, and A bearing body is provided between the left and right support members constituting the head, the intermediate shaft is rotatably supported on the bearing body, and an engaging portion is provided on the rear surface of the joint provided at the rear of the intermediate shaft. form,
On the other hand, engaged parts that fit into the engaging parts are also provided at the tips of the joint parts provided on the input shafts of the tilling device main body, and the engaging parts and the engaged parts are ,
The present invention provides a forward and reverse rotary tilling device, characterized in that the attachment frame is configured to be able to approach the tiller body from above in the vertical direction and be combined with each other.

The specific structure of the rotary tilling device 1, which is shown in a side view in FIG. 4 (Fig. 2) and a cultivating device main body 5 (Fig. 3). The tillage device body 5 is equipped with mounting frames 8, 8 for positioning, hit pins 9, 9, and a rear cover pressing mechanism 10, and a gear box 13 that pivotally supports input shafts 11, 12 in the front and rear. A drive case 16 and a side frame 17 whose upper parts are fixed to the ends of pipe frames 14 and 15 extending left and right from the gear box 13, and a shaft support at the lower part of the drive case 16 and side frame 17. 18 cultivated bodies
, a main cover 21 whose both ends are fixed to the drive case 16 and the side frame 17 and fixed to the pipe frames 14 and 15 via mounting plates 19 and 19, and a main cover 21 which is fixed to the front and rear edges of the main cover 21, respectively. Brackets 22, 22, 23, 23
A rear cover 28 is hinged at a hinge section 27 to a hinge section 26 having mounting pieces 25, 25 which are removably attached to one side of the rear cover with pins 24.
and a front cover 29 attached to the front edge of the main cover 21, and as shown in FIG. ,1
The drive chain mechanism inside the drive case 16 is driven by the transmission shaft which is connected to the output shaft 30 and is internally installed in the pipe frame 14, and meshes with the bevel gears 32 and 33 of No. 2. The tiller 18 is configured to rotate.

Then, as shown in FIG. 7, the stay 35 is fixed to the left and right support members 34 that constitute the head 7, and the intermediate shaft 37 is shafted with bearings 38 and 39 to the bearing body 36 attached to the stay 35. A joint part 42 is formed at the rear of the intermediate shaft 37 for supporting, for example, a groove 41 in the shape of a letter is formed in the disk-shaped part 40. Joint parts 45 and 46 are formed with protruding ridges 44. And the mounting machine frame 4 for the tilling device main body 5
In other words, changing the connection direction of the input shaft 11
12 by the PTO shaft 55 of the traction machine 2, the tilling claws of the tilling body 18 rotate in the right direction in the counterclockwise direction as indicated by the arrow in FIG. 1, or as shown in the figure. Although omitted, it rotates upright, which is a reverse clockwise rotation, and the coupling operation involves attaching the left and right lower links 47, 47 that make up the coupling mechanism 3 to the hit pins 9, 9 of the mounting machine frame 4. In addition, left and right lift arms 49, 49 rotate together with the piston of the lift cylinder with the top links 48 connected to the mast 6, respectively.
and lift the mounting machine frame 4 via the lower links 47, 47 with the lift rods 50, 50 as shown in FIG. The fitting recess 52 having a trapezoidal cross section formed at the lower part of the head 7 of the mounting frame 4 is fitted into the fitting convex portion 53 having a trapezoidal cross section of the gearbox 13. Mounting frames 8, 8 are pipe frames 14, 15
The lift arms 49, 49 are rotated downward so that the mounting machine frame 4 is lowered so as to be fitted outwardly, and along with the above fitting operation, the previous input shaft 11 or 12, that is, the input shaft 11 in FIG. The intermediate shaft 3 is attached to the protrusion 44 of the joint portion 45 of
The joint parts 42 and 45, 46 are formed so that the groove 41 of the joint part 42 of No.
are connected, and the PTO shaft 55 of the traction machine 2 and this universal joint shaft 54 are connected by the telescopic universal joint shaft 56, so that the PTO shaft 55 becomes the input shaft by the mutual coupling operation of the joint parts. 11 will be linked. In this state, the pipe frame 14,
Since the contact plates 57, 57 placed on the main cover 21 below the mounting frame 8, 57 will fit inside the front and rear legs of the mounting frames 8, 8, the pins 5 are attached to the mounting frame 8 and the contact plate 57.
8, the tiller main body 5 is connected to the attachment frame 4, and the input shaft 11 moves forward as shown in FIG. The structure is such that the rotation will be reversed if the position is reached.

Since the forward/reverse rotary tiller according to the present invention is configured as described above, the attaching machine frame 4 is lowered and approached from above in the vertical direction to the cultivating apparatus main body 5, and then connected to the attaching machine frame 4. top 7
The mounting frames 8, 8 for positioning, which are opened at the bottom on the left and right sides, are attached to the pipe frame 14 of the cultivating device main body 5,
15, and a single-letter-shaped groove 4 provided on the rear surface of the joint portion 42 of the intermediate shaft 37 that is pivotally supported on the top portion 7.
1, etc., and an engaged part made of a linear protrusion 44, etc. provided on the joint part 45 or 46 of either the input shaft 11 or 12 on the tillage device main body 5 side. Then, the left and right lower links 47, 47 that constitute the connection mechanism 3 are connected to the hit pins 9, 9 provided on the top part 7, and the attachment frame 4 is connected to the tiller main body 5. . In this way, the mounting frame 4 can be lowered from above the tilling device 5 to connect the mutual joint parts, and therefore, when connecting by hand, it is extremely safe.
Moreover, it is easy and quick to perform the coupling operation, and since there is no need to perform the coupling operation while reversing the tractor as in the conventional method, the coupling operation can be carried out even in a narrow space.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a perspective view of the mounting machine frame, and Fig. 3 is a perspective view of the mounting machine frame.
The figure is a perspective view of the tilling device main body, Figure 4 is an overall side view showing the state before installation, Figure 5 is a vertical sectional view of the main parts in Figure 4, Figure 6 is a gear diagram in the gear box, FIG. 7 is a perspective view of the main parts of the mounting machine frame. Explanation of symbols, 2...Traction machine, 4...Mounting machine frame, 5
... Cultivation device main body, 11, 12 ... Input shaft, 13
... Gear box, 18 ... Cultivating body, 37 ... Intermediate shaft, 42, 45, 46 ... Joint part, 54, 56
...Universal joint shaft, 55...PTO shaft.

Claims (1)

[Claims] 1 The rotary tilling device is divided into a mounting frame connected to the traction machine via a coupling mechanism and a tilling device main body including a tilling body, and in order to drive the tilling body, the tilling device is connected to the front and rear of the gearbox of the tilling device main body, respectively. A joint part is provided on the input shaft that is supported protrudingly, and an intermediate shaft that can be connected to the PTO shaft of the traction machine via a universal joint shaft is supported on the mounting machine frame, and the joint part provided on this intermediate shaft is provided with a joint part. The mounting frame is formed such that it can be connected to the joint part of the input shaft when the mounting frame is mounted on the tilling device main body, and the mounting direction of the tilling device main body relative to the mounting machine frame is changed. In a forward/reverse rotary tilling device configured such that the direction of rotation of the tiller body can be switched between forward rotation and reverse rotation, the attachment frame is provided with a positioning attachment having openings at the bottom on the left and right sides. A frame and a head provided with a hitch pin are connected, a bearing body is provided between the left and right support members constituting the head, the intermediate shaft is rotatably supported on the bearing body, and the intermediate shaft is rotatably supported on the bearing body, and An engaging part is formed on the rear surface of the joint part provided at the rear of the shaft, and on the other hand, the distal end part of the joint part provided on the input shaft on the cultivating device main body side is also fitted into the engaging part. established a department,
Further, the engaging portion and the engaged portion are configured such that the attachment frame approaches the cultivating device main body from above in the vertical direction and can be combined with each other. Rotary tillage device.