JPS6340082Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an attachment connection structure for an agricultural tractor.

In this type of connection structure, a two-point link bracket is attached to the fuselage, and the attachment can be pivoted so as to be able to swing vertically using the two-point link bracket, and the top link bracket and lower link fulcrum shaft are attached to the fuselage. If necessary, the attachment can be attached so that it can be raised and lowered using a 3-point linkage mechanism, but with the conventional structure, the lower link fulcrum shaft can be attached and detached. The following problems arose with the means provided.

In other words, in order to removably provide the lower link fulcrum shaft, conventionally, a support frame that slidably supports the lower link fulcrum shaft is provided removably to the aircraft body, and the lower link is attached to the two-point link bracket. A shaft insertion hole is formed to slidably support the end of the fulcrum shaft, and a bolt for preventing the lower link fulcrum shaft from sliding is attached to the support frame, and the lower link fulcrum shaft is mounted. First of all,
This can be done by inserting the lower link fulcrum shaft between the support frame attached to the aircraft and the two-point link bracket, and then fixing the slide of the lower link fulcrum shaft with a bolt in this state. In addition, in the installed state, the lower link fulcrum shaft can be firmly supported by the cooperation of the two-point link bracket and the support frame.

However, in the case of the above structure, the work of inserting the lower link fulcrum shaft across the support frame and the two-point link bracket must be done while correcting the misalignment of the axis caused by, for example, an assembly error of the support frame. Moreover, if there is another object such as a wheel on the side where the lower link fulcrum shaft is installed, There were also practical disadvantages, such as the need to specially form a hole for insertion.

The present invention has been developed in view of the above-mentioned circumstances, and is intended to solve the above-mentioned inconveniences through simple modifications.

Embodiments of the present invention will be described below based on the drawings.

As shown in Fig. 1, a front engine 1, a clutch housing 2, and a transmission case 3 are connected to form a machine frame. Left and right rear wheels on the sides 5,5
A power take-off shaft 6 for driving an attachment connected to the rear of the fuselage body is supported on the rear wall of the transmission case 3 in a state of protruding rearward, and further,
At the upper part of the rear end of the transmission case 3, left and right lift arms 8, 8, which lift and lower attachments such as a tilling device 7 connected to the rear of the fuselage, are pivoted by hydraulic cylinders 9 so as to be able to swing up and down. However, as the aircraft progresses, the tilling device 7 connected to the rear of the aircraft
It is configured to work with attachments such as.

At the rear end of the transmission case 3, there are two-point link brackets 10, 10 as a pair of left and right brackets.
is fixed by inserting a bolt a into a bolt hole 10A serving as a mounting part for the transmission case 3, and is a fulcrum at the tip of a pair of left and right two-point link connecting arms 11, 11 that are removably attached to the tilling device 7. Axis 11A
are engaged in notches 21 formed at the rear ends of the two-point link brackets 10, 10, and pivotably supported around the transverse axis X, and each of the lift arms 8, 8 is is connected to the tilling device 7 via lift rods 12, 12, so that the tilling device 7 can be connected so as to be operable to move up and down.

As shown in FIGS. 2 to 4, a top link bracket 14 that supports the top link 13 in a vertically swingable manner is removably bolted to the upper end of the rear wall of the transmission case 3. Attach the support frame 15 to the bottom wall of the two-point link bracket 1.
The lower link fulcrum shaft 16 for the three-point link is non-slidably bolted to the support frame 15 and is supported through the support frame 15 in a state in which both the two-point link brackets 1
0 and 10, respectively, are formed with notches 17 and 17 opening downward to engage the ends of the lower link fulcrum shaft 16, and from the notches 17 and 17 at the ends of the fulcrum shafts. Member 1 that prevents extraction of
8 and 18 are provided so as to be fitted onto the ends of the fulcrum shaft and removably bolted to the two-point link brackets 10 and 10, and further, vertically swinging bolts are provided at both ends of the fulcrum shaft 16, respectively. a lift rod 20 that interlocks and connects a pair of lower links 19, 19 that are pivotably supported and the lift arms 8, 8;
20 is provided so that the tilling device 7 can be connected to the top link 13 and both lower links 19, 19 so that it can be raised and lowered, and the lower link fulcrum shaft 16 is first installed. ,
Procedure for attaching the support frame 15 to the fuselage while engaging the ends of the lower link fulcrum shafts 16 supported therein into the notches 17, 17, and then attaching the blocking members 18, 18 to the two-point link brackets 10, 10. Therefore, it is configured so that it can be carried out easily and quickly without being hindered by the left and right rear wheels 5, 5.

The attachment connection structure of the present invention can also be applied to the case where it is provided at the front end of the fuselage.

Furthermore, in carrying out the present invention, the formation of the notch 17 can be modified in various ways, such as opening upward.

In summary, the attachment connection structure in the agricultural tractor according to the present invention includes the attachment part 22 to the machine body, and the connection arm fulcrum shaft 11A for the two-point link.
and a notch 17 that engages the end of a three-point link lower link fulcrum shaft 16 that is non-slidably supported through a support frame 15 that is removable to the fuselage. Dual-purpose bracket 1 with
0 to the fuselage, and the notch at the end of the lower link fulcrum shaft 16 for the three-point link, which is engaged in the notch 17 that engages the end of the lower link fulcrum shaft 16 for the three-point link, of the bracket 10. The present invention is characterized in that a member 18 for preventing extraction from the notch 17 is removably provided on the bracket 10.

That is, in the work of attaching the lower link fulcrum shaft 16, first, the support frame 15 is attached to the fuselage by engaging the end of the lower link fulcrum shaft 16 supported therein into the notch 17, and then the blocking member 18 is attached. A, 2
The troublesome work of inserting the lower link fulcrum shaft 16 in the conventional structure mentioned above is eliminated by making it possible to install it in the procedure of attaching it to the point link bracket 10. This eliminates the inconvenience caused by the blocking member 18 in the attached state.
Due to this action, the lower link fulcrum shaft 16 can be supported as robustly as in the conventional structure by the cooperation of the support frame 15 and the two-point link bracket 10.
As a result, we have achieved an attachment connection structure for agricultural tractors that has great practical advantages.

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]

The drawings show an embodiment of the attachment connection structure for an agricultural tractor according to the present invention, and FIG.
FIG. 2 is a side view of the rear of the tractor in a three-point link type connected state; FIG. 3 is a partially cutaway side view showing the mounting portion of the lower link fulcrum shaft; FIG. 4 is a partially cutaway rear view showing the same part. 10... Bracket, 11A... Connection arm fulcrum shaft for two-point link, 15... Support frame, 16... Lower link fulcrum shaft, 17, 21... Notch, 18...
...Blocking member, 22... Attachment part.

Claims (1)

[Scope of utility model registration request] A notch 21 into which the attachment part 22 to the fuselage and the end of the two-point link connecting arm fulcrum shaft 11A are inserted.
and a notch 17 that engages the end of a lower link fulcrum shaft 16 for a three-point link that is non-slidably supported through a support frame 15 that is removable from the fuselage. At the same time as mounting, the end of the lower link fulcrum shaft 16 for the three-point link, which is engaged in the notch 17 into which the end of the lower link fulcrum shaft 16 for the three-point link of this bracket 10 is engaged, is pulled out from the notch 17. member 18 that prevents
An attachment connection structure for an agricultural tractor, characterized in that the attachment is detachably attached to the bracket 10.