JPH0132806Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention extends the lower link for connecting the working equipment from the traveling machine body so as to be able to swing vertically and horizontally, and the lift rod for raising and lowering the working equipment and the lower link left and right extending from the traveling machine body. The present invention relates to a link mechanism for connecting a working device in which each of the swing restricting tools is connected to an intermediate portion of the lower link.

In the above link mechanism, conventionally, when an abnormally large force such as a ground rush reaction force acts on the connecting work device, stress concentration occurs at the connection part of the lift rod and swing regulating device in the lower link due to the reaction force. , the lower link sometimes became deformed.

In view of the above-mentioned circumstances, an object of the present invention is to enable the strength of the lower link to be increased at low cost.

A characteristic configuration of the present invention is that, in the above-mentioned link mechanism for connecting a working device, a series of abutment members for the connection portions of the lift rod and the restriction device in the lower link are provided by a connection device of the restriction device and the lower link. The function and effect are as follows.

In other words, the connecting portion to the swing regulating device or the lifting device, where stress concentration occurs due to the bending force or torsional force of the lower link, is reinforced with an abutment member to prevent deformation from occurring due to the acting force. . Therefore, the lower link can be made strong and not deformed even when a large load is applied. Moreover, by making the abutting member a series of parts extending over the connecting portion of the regulating tool and the lift rod and fixing it by the connecting tool, the connecting tool can also be used as a means for fixing the abutting member. , by adding an abutment member, the lower link can be heat treated,
Reinforcement is more economically advantageous than changing the wall thickness or material of the lower link, and the overall cost is lower.

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

As shown in FIG. 1, a rotary tiller 3 is connected to the rear of the wheeled traveling body 1 via a link mechanism 2 that can be driven and swung up and down, and can be operated up and down. The tiller is configured so that power is transmitted to the tiller 3 from an attached rotating shaft (not shown).

The link mechanism 2 is constructed by extending a lower link 5a or 5b from each of the left and right sides of the traveling body 1 so as to swing vertically and horizontally through a ball joint 6, and extending from the left and right sides of the traveling body 1 so as to swing vertically and horizontally. A pair of left and right lifts are provided, in which a top link 7 extends from the ball joint 6 so as to swing vertically and horizontally, and a pair of left and right lifts extends from the traveling body 1 so as to be freely swingable up and down by a hydraulic cylinder 8. One side 9a of arms 9a, 9b and one lower link 5
The middle part of the lower link 5b is connected to the middle part of the lower link 5b by the lift rod 10, and the other lift arm 9b is connected to the middle part of the other lower link 5b by a hydraulic cylinder 11 that performs rolling operation of the tilling device 3 with respect to the traveling machine body. , both lower links 5a, 5b
A turnbuckle-type telescopically adjustable rod 12 is installed over each intermediate portion and the traveling body to restrict the left and right swinging of the lower links 5a and 5b.

In the left lower link 5a, as shown in FIGS. 2 and 3, a series of members 13 for reinforcing the connecting portions of the regulating rod 12 and the lift rod 10 are installed on both lateral sides of the lower link 5a and The regulating rod 12 is fastened and fixed by bolts 15 and a connecting tool 14 which connects the regulating rod 12 to the lower link 5a. The lower link 5b on the right side is also reinforced in the same way.

Incidentally, the mounting positions of the lift rod 10 and the bolt 15 may be interchanged in order to change the angle at which the lower links 5a, 5b swing as the unit swing angle of the lift arms 9a, 9b is operated.

The abutment member 13 can be changed to one that abuts only one side surface of the lower link, or a two-piece structure that abuts each side surface of the lower link separately. That is, the specific shape can be changed in various ways.

The tilling device 1 can be changed to a trencher, a seedling planting device, etc., and these are collectively referred to as working devices.

The hydraulic cylinder 11 can be changed to a rod, and these can be used as a lift rod 10 for lifting and lowering the work equipment.
Collectively referred to as 11.

The rod 12 can be changed to a chain or the like, and these are collectively referred to as the swing restrictor 12.

[Brief explanation of the drawing]

The drawings show an embodiment of the link mechanism for connecting the working device according to the present invention, and FIG. 1 is a plan view of the rear part of the tiller;
FIG. 2 is a perspective view of the abutment member attachment portion of the lower link, and FIG. 3 is a sectional view of the abutment member attachment portion of the lower link. DESCRIPTION OF SYMBOLS 1... Traveling body, 5a, 5b... Lower link, 10, 11... Lift rod, 12... Rocking restriction tool, 13... Abutment member, 14... Connection portion.

Claims (1)

[Scope of utility model registration request] The lower links 5a and 5b for connecting working equipment are extended from the traveling machine body 1 so as to be able to swing vertically and horizontally, and the lift rod 10 or 11 for raising and lowering the working equipment and the lower link extending from the traveling machine body 1 are used to restrict horizontal swinging. Each of the tools 12 is connected to the lower links 5a, 5.
A link mechanism for connecting a working device connected to the middle part of the lower link 5a, 5b, which includes the lift rod 10 or 11 and the restrictor 12 in the lower links 5a and 5b.
A series of abutment members 13 for each connection part,
A link mechanism for connecting a working device, which is tightened and fixed by a connecting tool 14 between the restricting tool 12 and the lower links 5a and 5b.