JPH0446488Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention is a fixing device for a top link support in a link mechanism for connecting a working device such as a tilling device or a seedling planting device to the rear of the machine so that it can be raised and lowered. ,
Specifically, a plurality of connecting pins are inserted between the bracket fixed to the fuselage and the top link support, and each connecting pin is inserted between the fuselage or the bracket and the top link support at a location corresponding to each connecting pin. This invention relates to a fixing device for a top link support in a working machine, which is provided with a wedge-shaped lock spacer that prevents looseness of the connecting pin 3, and a spring that biases the lock spacer in the wedge-biting direction.

[Prior Art] As shown in FIG. 6, a fixing device for this type of top link support includes a pair of upper and lower lock spacers 50, 50, and a wedge action surface 50a,
It is known that the lock spacers 50a are arranged in opposite directions so as to intersect with each other, and are connected via a spring 51 that elastically biases the lock spacers 50 in the wedge-biting direction toward each other.

In such a fixing device, since each lock spacer 50, 50 is always urged in the wedging direction by the spring 51, the top link support 5
When vibration is applied to the connecting pin 52, the lock spacer 50 gradually bites into the gap generated in the range of play in the connecting pin 52, and by repeating this process, the connecting pin 52 is stopped from playing.

[Problems to be Solved by the Invention] However, in this conventional fixing device, when the top spring support 53 is removed from the bracket 54 of the aircraft body, the upper lock spacer 5 is removed while applying vibration to the top link support 53.
0 against the biasing force of the spring 51, and drop the lock spacer 50 between the fuselage and the pin insertion cylinder portion 53a of the top link support 53 with the smaller thickness side lying down. , further adding vibration to the top link support 53,
The wedge action of the lower lock spacer 53 is released, and both lock spacers 50, including the spring 51, are allowed to fall through the gap between the fuselage and the pin insertion cylindrical portion 53a of the top link support 53, and then the connecting pin 52 is removed. Since the top link support 53 has to be pulled out and removed, there is a problem in that the operation becomes very complicated.

The present invention has been developed in consideration of the above-mentioned circumstances, and its purpose is to provide a fixing device that allows the top link support to be removed efficiently and easily.

[Means for Solving the Problems] The characteristic structure of the fixing device for the top link support in a working machine according to the present invention, which was taken to achieve the above object, is that the plurality of lock spacers are The top link support or bracket is provided with an operating lever that is connected in a substantially parallel posture and that can move these lock spacers in the extraction direction against the biasing force of a spring. The effects and effects are as follows.

[Function] When removing the top link support from the aircraft,
By simply operating the lever against the biasing force of the spring while applying vibration to the top link support, a plurality of lock spacers can be simultaneously or almost simultaneously extracted and moved in the wedge action release direction.
Moreover, since each lock spacer is forcibly pulled out and moved in the same direction by lever operation, for example,
Only the lock spacer with a light load is extracted and moved, as in the case where the lock spacer, which is arranged in the same orientation as the conventional device, is extracted and moved in opposite directions to release the wedge action using a cam pivotally connected to the lever. There is no chance that it will happen.

[Effect of the invention] Therefore, regardless of the magnitude of the load acting on each lock spacer, multiple lock spacers can be pulled out quickly and reliably by operating the lever, making it easier to remove the top spring support from the bracket. can be done efficiently and easily.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

As shown in Fig. 3, a bracket 2 attached to the rear of the transmission case 1 of the tractor A has a
A top link support 4 is connected via a pair of upper and lower connecting pins 3, and a top link 5 that is pivotably connected to the top link support 4 and can swing vertically is pivotally connected to the transmission case 1. A tilling device B, which is an example of a working device, is installed over the left and right pair of lower links 6, 6, and
A pair of left and right lift arms 8, 8, which are driven and oscillated in the vertical direction by a single-acting hydraulic cylinder 7 built into the transmission case 1, and the lower links 6, 6 are moved by lift rods 10, 10, respectively. A riding type cultivator, which is an example of a working machine, is constructed by interlocking and connecting them.

To configure the fixing device for the top link support 4, as shown in FIG. 1 and FIG.
can be freely inserted from above between the upper and lower pin insertion cylinder parts 4a and the rear end surface of the mission case 1, and
Both pin insertion cylinder parts 4a can be pressed rearward as the bracket is inserted downward, in other words, the connecting pin 3 can be pushed to the rear end edge of the pin insertion hole 2a of the bracket 2 via both pin insertion cylinder parts 4a. Wedge action surface 11a that can be pressed
a pair of upper and lower wedge-shaped lock spacers 11,
11 are provided. Both of these lock spacers 11, 11 are integrally formed from one plate-like member, and both of the wedge action surfaces 11a, 11a are formed parallel to each other.

Between the annular member 13 externally fitted and supported on the lower ends of the lock spacers 11, 11 via β pins 12 and the lower surface of the top link support 4, the lock spacers 11, 11 are inserted downward, which is also the wedge-biting direction. A compression spring 14 is interposed to bias the movement, and an operating lever 15, which is locked to the upper end of the lock spacers 11, 11, is pivotally mounted on the top of the top link support 4. By swinging the operation lever 15 against the elastic biasing force of the compression spring 14, the lock spacer 1 is
1 and 11 are forcibly extracted and moved in the direction of canceling the wedge action.

[Another embodiment] In the above embodiment, a plurality of lock spacers 11,
11 was integrally formed from one plate-like member, but the fourth
As shown in the figure, a plurality of lock spacers 11 may be connected via a spring 16, which is an example of an elastic body.

That is, the lower lock spacer 4 is fitted around the connecting rod 17 connected to the lower surface of the upper lock spacer 4 so as to be able to move vertically, and the collar member 18 that abuts and restricts the maximum lowering position of the lower lock spacer 4 is attached. It is fixed to the connecting rod 17, and a spring 16 is interposed between the two lock spacers 4, 4.

In the case of this embodiment, even if there are manufacturing errors in the lock spacer 11, the top spring support 4, etc., the connection pin 3 can be reliably prevented from rattling.

Furthermore, as shown in FIG. 5, the same purpose can be achieved by attaching a leaf spring 19, which is an example of an elastic body, to the back surface of both the lock spacers 11, 11.

Further, in the above-described embodiment, the lock spacers 11, 11 provided with the operating lever 15 are attached to the top link support 4, but they may also be attached to the bracket 2 side.

Note that although numbers 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]

1 to 3 show an embodiment of a fixing device for a top link support in a working machine according to the present invention, FIG. 1 is a longitudinal sectional side view of the main part, and FIG. 2 is a sectional view taken along the line -1 in FIG. , FIG. 3 is a side view of the rear of the riding power cultivator. 4 and 5 are longitudinal sectional side views of main parts showing different embodiments, and FIG. 6 is a longitudinal sectional side view showing a conventional top link support fixing device. 2... Bracket, 3... Connection pin, 4... Top link support, 11... Lock spacer,
14... Spring, 15... Operation lever.

Claims (1)

[Claims for Utility Model Registration] A plurality of connecting pins 3 are inserted between the bracket 2 fixed to the machine body and the top link support 4, and between the machine body or the bracket 2 and the top link support 4, and A working machine is provided with a wedge-shaped lock spacer 11 at a location corresponding to each connecting pin 3 to prevent rattling of each connecting pin 3, and a spring 14 that biases the lock spacer 11 in the wedge-biting direction. A fixing device for a top link support in,
The plurality of lock spacers 11 are connected with their wedge action surfaces substantially parallel to each other,
A fixing device for a top link support in a working machine, in which an operating lever 15 capable of moving these lock spacers 11 in the extraction direction against the biasing force of a spring 14 is provided on the top link support 4 or the bracket 2. A fixing device for a top link support in a working machine according to claim 1, wherein the plurality of lock spacers 11 are connected via an elastic body. A fixing device for a top link support in a working machine according to claim 1, wherein the plurality of lock spacers 11, springs 14, and operating lever 15 are attached to a top link support 4.