JPH044484Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lift rod for a tractor, and more specifically, to a lift rod for a tractor in which a two-point link lift rod can also be used as a three-point link lift rod. It is.

[Conventional technology]

Conventionally, lift rods for two-point links have a pipe welded to the tip of the rotary cover on the rotary work machine or in a bulging shape so that they can be directly attached to the pins protruding on both the left and right sides of the rotary cover of the rotary work machine. It has a structure in which a fitting hole is provided in the formed part.

However, with a lift rod of this type of structure, if you want to attach a work equipment other than a rotary to the rear of the tractor body, when converting the 2-point link to a 3-point link and installing it, the lift rod must also be replaced with a lift rod for a 3-point link. However, there is a disadvantage that it cannot be connected to the lower link due to length or other reasons. Moreover, replacing the lift rod requires a lot of effort, and adjusting the relative heights of the left and right lower links to a horizontal state after replacement is difficult.
Furthermore, since it takes more time and effort, it is not easy to mount the working machine in a proper posture, which actually hinders the efficient operation of the tractor.

[Problem that the invention attempts to solve]

In view of the above-mentioned circumstances, the present invention has been developed in such a way that when installing a work machine on the rear body of a tractor, even when converting a 2-point link to a 3-point link depending on the type of work machine, the 2-point link is not required. There is no need to replace the link lift rod, and it can be used as a 3-point link lift rod by simply connecting the connecting plates.In addition, the 2-point link lift rod and the 3-point link lift rod can be unified, and parts can be reduced. In addition to making management easier, it also eliminates wasted time spent on replacing the lift rod and adjusting the height of the left and right lower links, and allows the work equipment to be easily installed in the proper posture, allowing the tractor to operate efficiently. The purpose of this invention is to provide a lift rod for a tractor that can be used.

[Means for solving problems]

The present invention employs the following technical means to solve the above problems.

That is, in a telescopically adjustable two-point link lift rod whose one end is attached to a lift arm and the other end is directly attached to a work machine, a connecting plate consisting of a pair of left and right plates can be attached and detached to the side of the lift rod that is directly attached to the work machine. A holding piece for holding the lift rod is formed at the upper end of the connecting plate, and a connecting hole for connecting to the lower link is formed at the lower end.

[Effect of invention]

Therefore, according to the present invention, when a rotary work machine is attached to the rear of the tractor body using a two-point link and work is carried out, a work machine other than the rotary work machine can be attached to the tractor as necessary. If you want to attach it to the rear of the machine, convert the 2-point link to a 3-point link and attach the above work equipment.
There is no need to replace the point link lift rod with a 3 point link lift rod, and the 2 point link lift rod can be used as a 3 point link lift rod by simply fixing the connection plate to the work machine side of the 2 point link lift rod. can be used,
Furthermore, if a lift rod that has been used as a three-point link lift rod is desired to be used again as a two-point link lift rod, it can be used as a two-point link lift rod by simply removing the connection plate.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 1 shows a state in which a rotary work machine is directly mounted on the rear body of a tractor by a two-point link. The base end of a lift arm 3 with its tip facing the rear of the tractor 1 body is pivotally supported in the upper part of the lift arm 3 so as to be able to swing vertically. A telescopically adjustable two-point link lift rod 7 consisting of a cylinder body 7a and a cylinder rod 7b is connected between pins 6 protruding from the left and right sides of the rotary cover 5.

FIGS. 2 and 3 show that the two-point link lift rod 7 is connected to the three-point link lift rod 9 by fixing the connection plate 8 to the work machine side of the two-point link lift rod 7 configured as described above. This figure shows a state in which a working machine other than a rotary is attached by a three-point link consisting of a top link 10 and a lower link 11, and the connecting plate 8 is shown in FIGS. 4 and 5. The upper ends of the left and right long plates 12, 12 are bent to face each other in order to hold the outer periphery of the tip end of the cylinder rod 7b of the two-point link lift rod 7 on the upper end sides thereof. , holding pieces 13, 13 having vertex-shaped notches 13a, 13a formed inward from their edges, and lower links having a plurality of holes formed in the vertical direction on the lower end sides of the elongated plates 12, 12. 1
1, 11 and connecting holes 14, 14, . . . . The connecting plate 8 is connected to the cylinder rod 7b by its holding pieces 13, 13.
is held from both sides by a tightening tool consisting of a bolt 17 and a nut 18 through a fitting hole 16 for a pin 6 formed in a swollen portion 15 extending at the tip of the cylinder rod 7b. It is designed to be fixed in a removable manner.

In the above embodiment, the holding piece 13 of the connecting plate 8 is formed with a corner-shaped notch 13a to hold the outer peripheral side of the cylinder rod 7b in a point contact state. is not limited to this, for example, the notch 13a may be formed in an arc shape, in short, the holding piece 13 can hold the cylinder rod 7.
Any material that supports b may be used.

Since the present invention is structured as described above, we will now introduce 2
If you want to convert the point link to a 3-point link and attach the work equipment to the rear body of the tractor 1, there is no need to replace the 2-point link lift rod 7 with a 3-point link lift rod, and simply replace the work equipment with the lift rod 7. Just by fixing the connecting plate 8 to the directly mounted side,
It can be used as a lift rod 9 for a three-point link.

That is, the holding piece 1 formed at the upper end of the elongated plates 12, 12 constituting the connecting plate 8
3 and 13 hold the cylinder rod 7b from both sides, and a fitting hole 16 formed in the bulged portion 15
A connecting hole 1 formed at the lower end side of the elongated plates 12, 12 is fixed by a tightening tool through the
4, 14, . . . are selected and connected to the lower links 11, 11 by the clevis pin 19, the two-point link lift rod 7 can be used as the three-point link lift rod 9. Therefore, it is necessary to replace the lift rod 7 and to replace the left and right lower links 1.
The work machine can be easily mounted in an appropriate posture while eliminating unnecessary effort spent on height adjustment work in steps 1 and 11.

In addition, when the working machine is subjected to soil resistance as the tractor 1 moves forward during work, a moment is generated that tries to lift the rear part of the working machine, and as a result, a compressive force is applied to the lift rod 9 used as a three-point link. However, since the connecting plate 8 holds the cylinder rod 7b by the holding pieces 13 formed at its upper end, it does not rotate around the center of the fitting hole 16. Since it does not bend in the middle, the working machine can always be controlled to have an appropriate posture.

Moreover, since a plurality of connection holes 14 to the lower link 11 are provided on the lower end side of the connection plate 8,
The length of the lift rod 7 can be adjusted stepwise, and therefore the connection work to the lower link 11 can be easily performed.

On the other hand, if you want to use the lift rod 9 used for the 3-point link as the lift rod 7 for the 2-point link, you can simply remove the connecting plate 8, so the lift rod for the 2-point link and the lift rod for the 3-point link can be unified. In addition to being economical, parts management becomes easy.

[Effect of idea]

In short, the present invention removably fixes a connecting plate consisting of a pair of left and right plates to the side directly attached to the work machine of a lift rod for a two-point link that can be freely adjusted by expansion and contraction, and also holds the lift rod at the upper end of the connecting plate. It forms a holding piece to hold the handle, and has a connecting hole to the lower link on the lower end side, so when attaching the work equipment to the rear of the tractor body, it is compatible with the type of work equipment. Even when converting a 2-point link to a 3-point link and installing it, the 2-point link
There is no need to replace the lift rod for point links.
Since it can be used as a 3-point link lift rod by simply connecting the connecting plates, it is possible to unify the 2-point link lift rod and the 3-point link lift rod, making parts management easier and replacing the lift rod. This eliminates unnecessary work and effort spent adjusting the height of the left and right lower links, and at the same time allows the work equipment to be easily installed in the proper posture, allowing the tractor to operate more efficiently. Even if a compressive force is applied to the lift rod as it moves forward, the holding piece can prevent the connecting plate from bending, and the work equipment can always be controlled in an appropriate posture, which is an extremely useful practical effect. play.

[Brief explanation of drawings]

The drawings show one embodiment of a lift rod for a tractor according to the present invention, and FIG.
An overall side view showing a state in which a rotary work machine is directly mounted on the rear body of a tractor using a point link, and Figure 2 shows a state in which a lift rod according to the present invention is used and a rotary work machine other than a rotary work machine is mounted on the rear body of a tractor using a three-point link. Fig. 3 is an enlarged side view of the main parts in Fig. 2, Fig. 4 is a rear view of the main parts showing the state in which the lift rod and the connection plate are connected, and Fig. 5 The figure is a plan view of the main parts of the same. 1...Tractor, 3...Lift arm, 7...
Lift rod, 8... Connection plate, 13... Holding piece, 14... Connection hole.

Claims (1)

[Scope of utility model registration request] In a telescopically adjustable two-point link lift rod with one end attached to the lift arm and the other end directly attached to the work machine, a connecting plate consisting of a pair of left and right plates is removably fixed to the side of the lift rod directly attached to the work machine. At the same time, a holding piece for holding the lift rod is formed on the upper end side of the connection plate,
A lift rod for a tractor, characterized in that a connecting hole to a lower link is bored on the lower end side.