JPS61119104A - Working machine mount apparatus of agricultural troctor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention aims at shortening the top link and lengthening the top link hinge when installing the rear cropping rack attachment device of an agricultural tractor so that the working machine can be positioned at the upper end. This article relates to a special 3-point link type sakuamiiso mounting device that is configured to rotate in reverse and be lifted up.

(b) Conventional technology From the past, i! ! In order to shorten the overall length of an agricultural tractor with a swiveling mechanism when making turns around the field, etc., a 3-point link type 4. The technology for using a ram attachment device is disclosed in Japanese Patent Application Laid-Open No. 57-7130.
1 was considered to be publicly known. However, even in these conventional technologies, the top link hinge was fixed to the top link bracket provided on the rear surface of the rear axle case or transmission case. be.

(c) Problems to be Solved by the Invention The purpose of the present invention is to solve the problem that the conventional top link hinge is located at a low position because it is provided on the mission case mask, and the position of the pivot point at the front end of the top link is low. Even at the highest position of the lift arm, the lift height was low.

When I tried to further reduce the length of the lift tube, I often encountered the problem of having to reduce the length of the top link and the length of the lower link, so I created a structure to solve this problem.

However, if the top link hinge is to be installed at a further position than the rear of the transmission case, it will be on the rear of the hydraulic case, but the hydraulic case is placed on the top of the transmission case or rear axle case and cannot be accessed from above. Since it is fixed with bolts, if the top link hinge was fixed only to this Ryota pressure case, the force applied to the tightening section would cause the tightening section to loosen, leak, and break. In order to prevent this, a reinforcing stay is provided from the transmission case, rear axle case, or rear axle housing side of the agricultural tractor.

B) Means for Solving the Problems The objects of the present invention are as described above, and the structure for achieving the objects will now be explained.

3 points for attaching a work paddle to the rear of a tractor: 1
In the link-type Sakutoshin mounting system, a top link hinge that extends long backwards is attached to the rear of the hydraulic case.

Also, a stay extends from the wall side of the agricultural tractor to the top link hinge to hold it.

(→ Embodiments and Functions The purpose and structure of the present invention will be explained in detail based on the structure of the embodiments shown in the drawings with gaps and openings as described above.)

This is a side view of the rear part of the fertilizer tractor. FIG. 2 is a plan view of FIG. 1 as well.

Figure 3 shows all other examples of Shouton 9III]! I'm evil. Figure 4 is a plan view of nest 3.

Figure 1, 5g2 factor 2 Let me explain first.

The μ71 is a transmission case for agricultural tractors, and is available in the A81 Karia axle case. The transmission case αη and the rear axle case U81 are connected to the clutch housing and the engine to form the main frame of your tractor. U81 is a rear axle housing protruding from the side edge of the rear axle case j34), through which the rear axle passes. (Check chain (1) on the underside of rear axle case U111
3L) (13R) check chain racket
It has been fixed.

In addition, a drawer bracket U4) is provided on the lower surface of the rear axle case U61, and the main parts of the uninvented
The stays (2LX2R) are extended and supported by this drawer bracket I.

A PTO @ is protruded to the rear of the rear axle case.
On the left side of the rear axle case tid is the lower link (8L
) (8R) is pivotally supported. Check chain (13L) (13R) is lower link (8L) (8R)
and check chain bracket (25T-) (25R
) to suppress the lower link 4117.

A hydraulic case (4) is placed on the upper surface of the rear axle case (ue), and a hydraulic cylinder for working is arranged inside.

The hydraulic cylinder has 7 arms (7L) on the left and right sides (
7R) is rotated and the lower link (8L) (8R) is rotated via the lift link (9L) (9R).

In such a configuration, conventionally, the top link hinge (3) for the calendar three-point linkage device was attached to the rear axle case u.
It was attached to BL's mask.

The reason for number 7 is that in the case of the special holiday 3-point link table, the top link hinge (3) is a sight that extends more than the midpoint of the lower link length, and a short top link is attached to the rear of this long top link hinge. Since the force is exerted in the vertical direction through
) is attached to the hydraulic case, this is because there is a rare problem where play occurs early in the stiff part between the hydraulic case (4) and the rear axle case Uθ.

In non-invention, this defect is i! To solve this problem, attach the top link hinge to the hydraulic case and attach the stay (2L) (2R) from the rear axle case T1611111.
) is medically extended and the top link hinge (3) is reinforced.

(3) is attached to the top link hinge L (51 is attached to the top link bracket, but the top link hinge (3) can be rotated between the top link bracket (5) and the upper pivot point, allowing for draft control. It also serves as a sensor.When using it as a draft control sensor like this, remove the stays (2L) (2R), remove the fixing bolt 0, and attach the top link hinge (3).
The top link bracket (5) swings via a spring interposed between the two.

In this way, the top link hinges are all used as draft sensors, and the feedback link is connected to the control valve in the hydraulic case, so the installation of the link is important from the perspective of adjusting the hydraulic pressure. It is better if the case and top link hinge (3J are integrated. (3a) is the top link (1)
〇Also, the stay (21) (2R) is not used during draft control, but also serves as a retraction stopper to fix the rotation of the top link hinge in case of position control or depth control. When using a top link hinge as a ruru〇 draft control sensor, the top link hinge is connected to the hydraulic case in an elastically biased state through a spring, so a large bending torque is applied to the joint of the hydraulic case. Regardless of the surface, this one button can withstand even without a stay! II
[It is teruru O Next, let us explain the embodiments shown in Fig. m3 and Fig. 4.

In this embodiment, a complete draft sensor +b) is interposed between the top link hinge (3) and the top link bracket (5). A spring is interposed between the top link bracket (5) and the draft sensor (6).

Also 1. In the third and fourth embodiments, the PTO brown cover is attached by extending the stays (2L) and (2R) in common with the attached placket. - is the top link (
1) and the four support pins of the top link hinge (3).

, (→Effects of the Invention The present invention has the following effects as described above.

First, even if the top link hinge is fixed to the back of the rear axle case as in the past, the position of the top link's retrospective fulcrum will be better if there is a wave layer on the top of the hydraulic case. Inevitably, the work equipment can be raised further. By making the top link more valuable, the top link can be made shorter by the amount of height that was gained in the past.
The lower link is also short, which makes it possible to row between the tractor and the work equipment.

Previously, mounting the 5g2 on the hydraulic case was avoided because the large bending force applied to the long top link hinge caused looseness at the mounting part of the hydraulic case, but the stay was attached to the rear axle case. By extending the stay, the bending force is also applied to this stay, which eliminates looseness when installing the hydraulic case.

Thirdly, when the top link hinge is used with a draft sensor etc., the stay can also serve as a draft lock, and by using the draft sensor, there is a gap between the top link hinge and the hydraulic case. Feedback links, etc. must be connected, but by assembling the two together, adjustment and assembly can be done at the assembly stage 〇, making assembly easy. Figure m1 is part 1 of the Sakuto captain's layer device at the rear of the tractor used.
1IllItr bad. Figure WJ2 is also a plan view of Figure 1.

ip, Figure 3 is a side view showing another embodiment. The fourth evil can be seen in the plan view in Figure 43.

Claims (2)

[Claims] (1) A three-point link type work equipment attachment device for attaching a work implement to the rear of an agricultural tractor, characterized in that a top link hinge that extends long rearward is attached to the rear of a hydraulic case. Mounting device. (2) A work equipment mounting device for an agricultural tractor, characterized in that a stay extends from the body of the agricultural tractor to the top link hinge as set forth in claim 1 and is held therein.