JPH0547544Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for attaching a top link bracket for connecting a working machine to the rear of an agricultural tractor equipped with a safety frame.

[Conventional technology]

Agricultural tractors that tow work equipment for agricultural work are generally equipped with a safety frame that protects the driver's seat, but this type of agricultural tractor has a mounting bracket for the safety frame and a safety frame that protects the driver's seat. The top link brackets to be connected are superimposed and fixed on the same surface at the rear of the fuselage so that they are both located at the center of the fuselage.

[Problems that this invention attempts to solve]

However, in the past, the mounting bracket and top link bracket, which were loaded onto the same surface at the rear of the machine, were fastened together using the same mounting bolt. If the mounting bolts loosen due to impact, not only the top link bracket but also the mounting bracket will loosen at the same time, resulting in incomplete installation of the safety frame and adversely affecting safety. Furthermore, when replacing the top link bracket, there is a problem in that when the mounting bolt is loosened, the mounting bracket is also loosened at the same time, making it impossible to guarantee the reliability of the mounting portion of the safety frame, which is an important safety component.

The present invention was devised in order to solve these problems in view of the above-mentioned circumstances, and is designed to prevent the mounting bracket from loosening even if the mounting bolts of the top link bracket become loose, thereby ensuring the safety of the safety frame. It is an object of the present invention to provide a mounting structure for a top link bracket in an agricultural tractor that can reliably guarantee the performance of the top link bracket.

[Means for solving problems]

The technical measures taken by the present invention to solve the above-mentioned problems are that, in an agricultural tractor equipped with a safety frame that protects the driver's seat and a top link bracket that connects the work equipment, the mounting bracket of the safety frame is attached to the body of the tractor. It is characterized in that it is attached and fixed to the rear surface via a fastener, and a top link bracket overlaid on the mounting bracket is attached and fixed independently from the mounting bracket via another fastener.

[Effect of invention]

Therefore, according to the present invention configured as described above, the top link bracket is attached and fixed to the mounting bracket of the safety frame attached and fixed to the rear surface of the machine body, but the top link bracket is attached to the work machine. Even if the top link bracket comes loose due to impact, the other fasteners that mount and fix the top link bracket independently will loosen, and the fasteners that fix the mounting bracket will not come loose, and the top link bracket will not loosen. When replacing the frame, by loosening the other fasteners, only the top link bracket can be attached or detached without loosening the mounting bracket, ensuring reliability at the attachment part of the safety frame, which is an important safety component. can be guaranteed.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a hydraulic case disposed at the rear of the agricultural tractor; 2 is a mounting bracket that is attached and fixed to the rear surface of the hydraulic case; on the left and right sides of the mounting bracket 2 are safety panels (not shown) for protecting the driver's seat; Base end portions 3, 3 of the struts of the frame are fixed via attachment members 4, 4. The mounting bracket 2 has mounting holes 5, 5 symmetrically drilled on the lower end side, and the mounting holes 5, 5 are located above the mounting holes 5, 5 at approximately the center of the mounting bracket 2 in the vertical direction. Left and right mounting holes 6, 6 similar to the holes 5, 5 are bored. Further, at an intermediate position between the mounting holes 5 and 6, a through hole 7 having a larger diameter than the mounting holes 5 and 6 is provided.
7 are formed on the left and right sides, and a large diameter through hole 8 is formed in the center of the upper side of the mounting bracket 2, which faces the hydraulic pressure and the protrusion 1a protruding from the upper surface of the case 1. Mounting bolts 10, 10 are inserted into the mounting holes 5, 5 through flat washers 9, 9.
into the mounting holes 11, 11 of the hydraulic case 1,
By screwing the mounting bolts 13, 13, which are similarly inserted into the mounting holes 6, 6 through flat washers 12, 12, into the mounting holes 14, 14 of the hydraulic case 1, the mounting bracket 2 It is attached and fixed to the rear surface of case 1.

Reference numeral 15 denotes a top link bracket which is superimposed and fixed on the mounting bracket 2, and on the rear surface of the top link bracket 15 are left and right mounting plates 16, which hold the top link of the three-point link device.
16 are protruded. The top link bracket 15 is formed to have approximately the same width on the left and right as the mounting bracket 2, but its length in the vertical direction is such that when overlapped with the mounting bracket 2, its lower end edge is larger than the mounting bracket 2. Lower mounting hole 5,
It is positioned above 5. At the lower end side of the top link bracket 15, there are mounting holes 17, facing the through holes 7, 7 of the mounting bracket 2.
17 is bored, and above the mounting holes 17, 17, facing the mounting holes 6, 6, a mounting bolt 1 is inserted.
Through holes 18 and 18 having a larger diameter than those of holes 3 and 13 are formed. Further, a mounting hole 19 is bored in the center of the upper end of the top link bracket 15 at the position of the through hole 8 of the mounting bracket 2. Then, the mounting bolts 22, 22 screwed and fixed into the mounting holes 20, 20 of the hydraulic case 1 via nuts 21, 21 are inserted into the mounting holes 17, 17 of the top link bracket 15,
The nuts 23, 23 are screwed together, and the mounting bolt 25 is inserted into the mounting hole 19 via the flat washer 24.
By screwing into the mounting hole 26 of the hydraulic case 1, the top link bracket 15 overlaps with the mounting bracket 2 and is fixed thereto.

In the above configuration, first, attach the mounting bracket 2 to the rear surface of the hydraulic case 1, and attach the mounting bolts 10,
10, and the mounting bolts 13, 13, then the top link bracket 15 is superimposed on the mounting bracket 2, and the mounting bolts 2 are fixed.
2, 22 and the mounting bolt 25, the mounting bolts 10, 10 are located below the top link bracket 15, and the mounting bolts 13,
13 are located in the through holes 18, 18, and the mounting bolts 22, 22 and 25 are located in the through holes 7, 18 of the mounting bracket 2, respectively.
7 and through hole 8, the top link bracket 15 is fixed independently from the mounting bracket 2. Therefore, even if the top link bracket 15 were to loosen due to impact from a working machine during agricultural work, the mounting bolts 22, 22, which are different from the mounting bolts 10, 13 that fixed the mounting bracket 2, should be used. , and mounting bolt 25
, but the mounting bracket 2 will not loosen, and even when replacing the top link bracket 15, the mounting bracket 2 can be replaced without loosening.
It can be replaced, and reliability at the attachment part of the safety frame can always be ensured.

[Effect of idea]

In summary, the present invention is an agricultural tractor equipped with a safety frame that protects the driver's seat and a top link bracket that connects the work equipment, in which the mounting bracket of the safety frame is attached and fixed to the rear surface of the machine via a fastener. At the same time, since the top link bracket superimposed on the above-mentioned mounting bracket was attached and fixed in a state independent from the mounting bracket via another tightening tool, the mounting bracket of the safety frame and the top link bracket connecting the work machine were superimposed. Even though the top link bracket is mounted on the rear of the machine, in the unlikely event that the top link bracket becomes loose due to impact from a working machine during agricultural work, a separate tightening tool other than the one that secures the mounting bracket should be used. The mounting bracket will not come loose because the tool will loosen, and even if you want to replace the top link bracket, you can remove only the top link bracket by loosening another tightening tool.
The reliability of the mounting portion of the safety frame, which is an important safety component, can be guaranteed.

[Brief explanation of the drawing]

The drawings show an embodiment of the mounting structure of the top link bracket in an agricultural tractor according to the present invention, in which Fig. 1 is a perspective view showing the mounted state, Fig. 2 is a side view of the main part, and Fig. 3 is a side view of the main part. It is a rear view same as the above. In the figure, 2...Mounting bracket, 10, 13...
Mounting bolt, 15...Top link bracket,
22, 25... Mounting bolts.

Claims (1)

[Scope of utility model registration request] In an agricultural tractor equipped with a safety frame that protects the driver's seat and a top link bracket that connects the work equipment, the mounting bracket of the safety frame is attached and fixed to the rear of the machine body via a fastener, and the top link bracket is superimposed on the mounting bracket. 1. A top link bracket mounting structure for an agricultural tractor, characterized in that the top link bracket is mounted and fixed independently from the mounting bracket via another fastener.