JPH018081Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a top link fixing device for a tractor.

Generally, a coupling mechanism for coupling a working machine such as a rotary to the rear of a tractor consists of a top link and a lower link. This work equipment may be removed from the tractor due to work circumstances and the tractor alone is driven, but when the work equipment is removed, the lower link remains fixed as it is supported by the drive arm for lifting and lowering. However, since one end of the top link is free, if left as is, it will wobble while driving and will collide with the tractor body, causing damage. Conventionally, in order to prevent such wobbling, a hook was attached to the PTO guard and the top link was fixed using this hook, or it was fixed to the seat or bracket using a spring or rubber rope. However, in any case, the fixation is uncertain,
Furthermore, since extra parts are provided, troubles such as losing the parts are caused, and the cost of manufacturing the parts is forced to increase.

The purpose of the present invention is to solve the above-mentioned problems and provide a top link fixing device for a tractor that can securely fix the top link to prevent it from wobbling without providing any extra accessory parts. There is a particular thing.

The top link fixing device for a tractor of the present invention, which achieves the above object, connects the connecting rods at both ends with a turnbuckle, and also connects the top link by drilling an engagement hole in a rotating handle fixed to the outer periphery of the turnbuckle. A locking pin is inserted through a connecting hole for connecting the top link formed in the bracket and an engagement hole of the handle, and at least one of the top links is inserted into the bracket. The other two parts are characterized in that they are supported in contact with the wall surface of the bracket or the outer surface of the tractor body.

The present invention will be explained below with reference to embodiments shown in the drawings.

In the figure, 1 is the transmission case of the tractor body, 2 is the transmission case 1
This is a hydraulic case fixed to the top of the. There is a bracket 3 at the upper rear of the transmission case 1.
is fixed, and the top link 4 is attached to this bracket 3.
are connected. Further, a lower link 5 is pivotally supported at the lower rear end of the transmission case 1.
Drive arm 6 whose intermediate part is provided in hydraulic case 2
is hanging. A working machine (not shown) is detachably attached to the rear ends of the top link 4 and lower link 5.

The top link 4 is composed of connecting rods 7, 7 at both ends, and a turnbuckle 8 that connects and screws together the connecting rods 7, 7, and a pair of rotating handles 9, 9 are provided on the outer periphery of the turnbuckle 8. Welded to extend in opposite directions. In addition, an engagement hole 9a for fixing the top link, which will be described later, is formed in the handle 9 so as to pass through the handle in the longitudinal direction laterally.

The screws at both ends of the turnbuckle 8 have spiral directions opposite to each other. For this reason, handles 9, 9
When the turnbuckle 8 is rotated, the top link 4 can be expanded and contracted in the longitudinal direction, and its length can be locked by a lock nut 7b. Further, an engagement hole 7a for connection consisting of a ball joint called a so-called centerpiece is provided at the outer end of the connection rods 7, 7, and one of these engagement holes 7a is provided in the bracket 3. It is connected to one of the plurality of connecting rods 3a via an engagement pin, and a working machine (not shown) is connected to the other engagement hole 7a.

In the above-mentioned tractor, when the rear working machine is removed and the tractor is driven on the road, the top link after the working machine is removed can be fixed in the following manner.

That is, the top link 4 is connected to the connection hole 3a of the bracket 3 by an engagement pin 10 through the eye engagement hole 7a, but first, the engagement pin 10 is removed and the top link 4 is removed from the bracket 3 at one end. Remove. Next, as shown in FIG. 2, with the removed top link 4, the outer end of one handle 9 is brought into contact with the inner wall surface of the bracket 3, and the outer end of one of the connecting holes 7a is brought into contact with the transmission 1.
the other handle 9 is in contact with the outer wall surface of the bracket 3, and the engagement hole 9a of the other handle 9 is connected to the connection hole 3a of the bracket 3.
Insert the engaging pin 1 into both holes 9a and 3a.
0, and use the snap pin 11 to prevent it from coming out. In this way, the top link 4 is securely fixed to the rear of the tractor body without wobbling. In addition, when the outer end of the engagement hole 7a is brought into contact with the outer wall surface of the transmission 1, the top link 4 is expanded and contracted to an appropriate length by rotating the turnbuckle 8, and in this state, the connecting rod is By locking the top link 7 with the lock nut 7b, the top link 4 can be brought into contact without wobbling.

Therefore, according to the above-mentioned device, the handle 9 of the turnbuckle 8 provided in the conventional device is
On the other hand, with an extremely simple structure in which only the engagement hole 9a is formed, it is possible to securely fix the top link 4 without wobbling without adding any other special parts.

In the above-described embodiment, the support portion of the top link 4 in the fixed state is inserted into the engagement hole 9a of the handle 9.
The other contact points are the outer end of the other handle 9 and the outer end of the engagement hole 7a. Alternatively, it may be brought into contact with the outer wall surface of the tractor body.

As described above, the top link fixing device for the tractor of the present invention connects the connecting rods at both ends with a turnbuckle, and forms the top link by drilling an engagement hole in a rotating handle fixed to the outer periphery of the turnbuckle. However, the top link is attached to the bracket that is fixed to the tractor body.
A locking pin is inserted through a connection hole for connecting the top link formed in the bracket and an engagement hole of the handle, and at least the other two of the top links are inserted.
Since the part is supported in contact with the wall surface of the bracket or the outer surface of the tractor body, it is possible to securely fix the top link without wobbling, without providing any extra attached parts.
In addition, since there are no extra accessory parts, it is possible to eliminate troubles and cost increases caused by missing parts that occur in conventional devices.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a tractor equipped with a top link fixing device according to the present invention, FIG. 2 is an enlarged side view of the main parts thereof, and FIG. 3 is a cross-sectional view taken along the - arrow in FIG. 1... Transmission case, 3... Bracket, 3a... Connection hole, 4... Top link,
7... Connection rod, 7a... Connection hole, 8... Turnbuckle, 9... Handle, 9a... Engagement hole, 10
...Engagement pin.

Claims (1)

[Scope of utility model registration request] A top link is constructed by connecting the connecting rods at both ends with turnbuckles and drilling an engagement hole in a rotating handle fixed to the outer periphery of the turnbuckle.This top link is attached to a bracket fixed to the tractor body. A locking pin is inserted through a connection hole for connecting the top link drilled in the bracket and an engagement hole in the handle, and at least two other parts of the top link are supported in contact with the wall surface of the bracket or the outer surface of the tractor main body. A top link fixing device for a tractor, characterized in that: