JPH0751868Y2 - Work unit connecting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention pivotally attaches a working portion to a machine body at a base end portion thereof, and installs a hydraulic cylinder across the main frame and the machine body. The present invention relates to a work unit connection structure of a work machine configured to be movable up and down with respect to a machine body.

[Conventional technology]

Conventionally, there is a combine as an example of a working machine having the above-mentioned working section connecting structure, and as shown in, for example, Japanese Patent Laid-Open No. 59-17912, a cutting section as a working section is provided with a base end of its main frame. The detachable state of the mowing unit, in which the link is connected by connecting the hydraulic cylinder tip for raising and lowering the mowing unit and the main frame via a link. It is known that this is obtained.

[Problems to be solved by the device]

By removing the mowing part from the machine body,
Check the various devices located near the connection of the mowing unit with the machine body.
It is designed for maintenance and cleaning, but even in the detached state, since the mowing part is still connected to the machine body through the link, the link has a long length Since it is difficult to secure a sufficient space for inspection with the machine body, it is difficult to do the work, and even if you try to maintain the mowing part and the machine side device, for example, the traveling device at the same distance, they will be linked by a link. In the end, in that case, you have to remove the link.
And there was trouble.

Therefore, it is conceivable to improve the inconvenience by completely separating the mowing unit from the machine body. For that purpose, it is necessary to make the cylinder and the mowing unit detachable. However,
Generally, as shown in FIG. 8, a U-shaped bracket (21) is welded to the main frame (2) of the mowing part, and the tip boss (22) of the hydraulic cylinder (16) is fitted into the bracket (21). The left and right holes of the bracket (21) and the boss (22)
Since the structure is such that the pin (24) that penetrates through the three parts is inserted and connected, it is necessary to align the left and right holes with the holes of the boss (22) accurately when inserting the pin (24) Since it is not allowed, it is difficult to attach and detach the cylinder and the cutting unit.

In view of the above situation, it is an object of the present invention to make the working unit and the machine body completely separable by facilitating the attachment / detachment of the hydraulic cylinder and the working unit, thereby achieving a fundamental solution for the working space.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention is configured such that the base end portion is detachable from the machine body in the work unit connecting structure of the work machine described at the beginning, and the main frame and the hydraulic cylinder are either A single mounting boss provided on one side is sandwiched between two mounting parts consisting of left and right brackets provided on the other side, and a connecting pin is inserted to pivotally connect and one of the left and right brackets is connected. The distal end portion to which the connecting pin (4) is fixed is detachably connected and fixed to its base portion.

[Action]

According to the above configuration, when mounting the hydraulic cylinder and the main frame, only the holes of the mounting boss and the holes of one bracket are aligned, and then the connecting pin of the other bracket tip is fitted and It may be fixed to the other bracket base portion with a bolt or the like.

In other words, the connecting pin does not need to pass through a three-way hole as in the conventional case, but only needs to pass through a two-way hole, so that the connecting pin can be easily inserted even if there is a slight misalignment. At the same time, the fixing of the tip portion and the base portion, which is performed after that, is a two-part assembly, so that the work for fixing the fixing portion is not difficult.

[Effect of device]

Therefore, it is possible to easily and easily attach / detach the hydraulic cylinder for raising and lowering the working unit and the main frame, and by removing this and the main frame base end, the working unit can be completely separated from the machine body, and it is wide. It was possible to provide a working part connection structure that eliminates the inconveniences of the prior art, which allows a working space to be created freely.

〔Example〕

FIG. 6 shows a front portion of a combine, which is an example of a working machine having the structure of the present invention. In this combine, a machine having a crawler type traveling device (7) is provided with a threshing section (8), an operating section (11) and the like to configure a machine body, and the planted grain culm is separated along with traveling. Weeding is divided into a mowing object and a non-mowing object by a grass tool (12), and the mowing device (13) raises the mowing object and the mowing device (14) mows and feeds the harvested culm ( 15) threshing part (8)
A cutting unit (1) (an example of a working unit) configured to supply the starting end of the machine is connected to the front part of the machine body in a state in which swinging and raising / lowering operations can be performed by a hydraulic cylinder (16). It is constructed so that it can be trimmed.

To connect the reaping section (1) to the airframe, as shown in FIGS. 2 and 3, the left and right ends of the main frame (2), which is also used as the transmission case of the reaping section (1), A fulcrum stand (5) mounted on the upper surface of a cradle (3) erected on the machine body frame (4) of the machine body is fitted vertically swingably.

The fulcrum base (5) has a cover plate (6) having an engaging portion (6a) whose tip is rounded down and folded, and a sideways cylindrical portion (2a) serving as a base end portion of the main frame (2). Left and right support members (1
It is constructed by fixing 7) and (17).

Then, the fulcrum base (5) has an engaging portion (6a) of the cover plate (6) on a connecting rod (18) installed on the front portions of the left and right supporting frames (3a) and (3a) of the receiving base (3). And the nuts (3b) and (3b) provided at the rear of the left and right support frames (3a) and (3a) are bolted to the pedestal (3) to be detachably attached. ing.

The left and right folded end edges of the engaging portion (6a) are cut obliquely so that the width becomes narrower toward the rear in order to easily engage with the connecting rod (18).

Next, a connection structure between the main frame (2) and the hydraulic cylinder (16) will be described.

As shown in FIGS. 1 and 2, the left and right brackets (19) and (20) are fixed to the middle portion of the main frame (2) in the longitudinal direction to form a mounting portion (21), and Hydraulic cylinder (16) between both brackets (19), (20)
The mounting boss (22) formed at the tip of the movable piece (16A) is sandwiched.

The left bracket (19) of the brackets (19) and (20) is a base (19) fixed to the main frame (2).
a) and this base (19a) with two bolts (23), (2
It is composed of a tip portion (19b) fixed by 3), and the attachment boss (22) and a connecting pin (24) penetrating the right bracket (20) are welded to the tip portion (19b). Therefore, the movable piece (16A) is pivotally connected to the main frame (2).

According to the above structure, the movable piece (16A) and the main frame (2) are detachable, and when the mounting boss (22) is connected to the mounting portion (21), the mounting boss (22) has a hole. Since the connecting pin (24) of the tip portion (19b) of the left bracket (19) may be passed through by aligning it with the hole of the right bracket (20), the attachment can be easily performed. And
If the two bolt (23) insertion holes (25) and (25) at the tip (19b) are formed in stupid holes, the mounting boss (22) and the right bracket (20) will be slightly misaligned. The tip portion (19b) can be easily bolted to the base portion (19a) even with relative inclination.

As shown in FIG. 4, the mowing section (1) is provided with two large packers (26) and (26) for feeding the mowing culms to the feeding and conveying device (15). Interlocking with the upper packer (32) that is rotated by the driving force input from the raising device (13) in order to ensure the feeding of the cut grain culm in the middle of the lines to the supply and transport device (15). The connected small packer (27) is arranged at the front position between the large packers (26) and (26).

Further, as shown in FIG. 5, a pedestal (3) and a fulcrum pedestal (5) are formed, and a pin screw (28) protruding from the front of the pedestal (3) is
The structure may be located just at the front end corner of the forward-facing triangular opening (6b) formed in the cover plate (6) of the fulcrum base (5).

[Other Embodiment] As shown in FIG. 7, the movable piece (16) of the hydraulic cylinder (16) is
A) A mounting portion (21) having left and right brackets (19), (20) at the tip may be configured to hold a single mounting boss (22) formed on the main frame (2). Further, as shown in the figure, a screw is cut at the tip of the connecting pin (24), and the needle bearing (29) press-fitted into the mounting boss (22) is tightened with the nut (30) through the spacer (31) to pivot. It may have a structure in which they are supported and connected.

Further, the present invention can be applied to a work unit connecting structure in any work machine including a work machine such as a dozer work vehicle and a front mount type lawn mower other than the combine machine, which is capable of moving up and down.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a working unit connecting structure of a working machine according to the present invention, FIG. 1 is an exploded view showing a mounting structure of a hydraulic cylinder and a main frame in the connecting structure, and FIG. 2 is a side view showing the structure. FIG. 3 is an exploded perspective view showing the mounting structure of the main frame to the machine body, FIG. 4 is a plan view of the feeding and conveying device, and FIG. 5 is a plan view showing another embodiment of the connecting structure of the cover plate and the pedestal. Figures and 6 are side views of the front part of the combine,
FIG. 7 is a sectional view showing another embodiment of the mounting structure of the hydraulic cylinder and the main frame, and FIG. 8 is a structural view of the main part showing a conventional example. (1) …… Working department, (2) …… Main frame, (2a)
…… Base end, (16) …… Hydraulic cylinder, (19), (20)
…… Bracket, (21) …… Mounting part, (22) …… Mounting boss, (24) …… Connecting pin, (19a) …… Base part, (19b)…
... the tip.

Claims (1)

[Scope of utility model registration request] 1. A working portion (1) is pivotally attached to a machine body at a base end portion (2a) of a main frame (2) thereof, and a hydraulic cylinder (1) extends between the main frame (2) and the machine body.
A structure for connecting a working portion of a working machine, which is configured to be vertically movable with respect to the machine body by installing 6), wherein the base end portion (2a) is configured to be removable from the machine body, and the main frame (2) and the hydraulic cylinder (16), a mounting portion (21) comprising two brackets (19), (20) on the left and right with a single mounting boss (22) provided on either one ) And insert the connecting pin (24) for pivotal connection, and connect one of the left and right brackets (19) and (20) to the base (19a) of the connecting pin. A working portion connecting structure for a working machine, which is configured by detachably connecting and fixing a tip portion (19b) to which (24) is fixed.