JPH0238587Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a reaping section connection mechanism of a combine harvester.

(b) Conventional technology In a conventional combine harvester, a reaping section is connected to the front of the machine stand, and while the machine is running, the reaping section harvests grain culms, which are then transported to the machine for threshing and sorting. and is configured to collect grain.

Moreover, the connection between the reaping section and the machine base is configured to be detachable, so that the reaping section can be attached and detached as necessary.

As such an attachment/detachment mechanism, for example,
-15317, Japanese Patent Application Laid-Open No. 56-64715, etc., for connection at the top, a recess for a bearing with an upward opening is provided on the machine stand side, and the shaft of the reaping section is placed into this from above. In addition, the lower part of the lifting connection for raising and lowering the reaping part can be connected directly with a hydraulic cylinder or by using a single link rod between the reaping part and the machine stand. A hydraulic cylinder on the machine base side is connected to the middle part of the link rod, and the vertical movement of the hydraulic cylinder for elevating and lowering is transmitted to the reaping section via the link rod.

(c) Problems to be solved by the invention Therefore, in such conventional technology, when connecting the reaping section to the machine stand, the upper connection is done by lifting the reaping section in advance using a lifting tool such as a jack. The only way to do this was to fit the reaping section from above into the bearing recess on the machine base, which opened upward, making the work of lifting the reaping section complicated and dangerous.

In addition, if the lifting mechanism for raising and lowering the reaping section is connected directly using only hydraulic cylinders, the heavy hydraulic cylinder must be manually lifted to the connecting position, which requires a lot of work. It had a drawback that required hard work.

In addition, if a structure is adopted in which a single link rod is interposed between the reaping section and the machine stand and a hydraulic cylinder is connected to it, only the tip of the link rod is connected to the reaping section. Although the disadvantages of directly connecting the hydraulic cylinders described above can be overcome, since it is a single link rod, the range of rotation for alignment for connection is a semicircular arc-shaped rotation locus, and the position The adjustment range is small, and in order to reach the connecting position of the reaping section, it is necessary to move the reaping section to a certain extent so that it comes to the rotation trajectory of the tip of the link rod, which again requires a lot of effort in the connection work. In short, there was no change.

In order to solve this problem, it is necessary to adopt a link mechanism in the upper connecting part as in JP-A-56-64715, and with such a configuration, the above connection becomes a connection via a link, which becomes even more complicated. It had some drawbacks.

(d) Means for solving the problem In this invention, a bearing recess that opens toward the reaping section is provided at the upper end of the machine frame provided on the machine base side, and a shaft case that serves as a rotational fulcrum for the reaping section is installed in the recess. The lower frame of the reaping section is detachably connected to the front of the machine via a connecting link, and the connecting link is It consists of a base link rod whose base end is rotatably connected to the machine frame, and a tip link rod whose base end is rotatably connected to the tip of the base link rod, and the lower frame of the reaping section is connected to the tip link rod. Rotatably attached to the tip of the rod,
A reaping section connection for a combine harvester in which the entire reaping section is configured to be detachable from the machine base, and the reaping section can be raised and lowered by a hydraulic cylinder interposed between the midway part of the tip link rod and the base. It is intended to provide a mechanism.

(E) Function First, when connecting the reaping section to this machine, first align the position of the shaft case of the reaping section and the position of the bearing recess of the machine base, which is the main machine, and then move the machine base forward. Then, the connection at the top can be easily completed by simply fitting the shaft case at the rear end of the reaping section into the bearing recess opened to the reaping section side and applying measures to prevent it from coming off.

Next, the connection of the reaping unit lifting mechanism that raises and lowers the reaping unit is performed between the reaping unit and the lower part of the machine stand, that is, the lower frame of the reaping unit and the connection link pivotally connected to the machine stand are connected. This connection operation is performed as follows. First, the connecting link is a base link rod that is directly pivoted to the machine base,
Since the tip link rod is pivotally attached to the tip of the link rod, the tip link rod is moved up and down or back and forth in order to apply the tip of the tip link rod to the lower frame of the reaping section.

In order to move this tip link frame, it can be done manually only, or it can be done with a hydraulic cylinder connected to the middle part of the tip link frame, and when it is done manually, the connecting link is one part of the four-bar link mechanism. Since the distal end portion can be rotated to some extent without extending or contracting the hydraulic cylinder, it can be easily attached to and detached from the lower frame of the reaping portion, which is the target connection position.

In addition, when connecting using the expansion and contraction operation of a hydraulic cylinder, since the tip of the hydraulic cylinder is connected to the midway part of the tip link rod, the tip link rod rotates itself and the base. In conjunction with the rotation of the link rod, a complex operating trajectory is drawn, and the connection position of the reaping section with the lower frame can be delicately and precisely determined, and the position adjustment range of the tip link is wide, making it suitable for tasks such as moving the reaping section. Simple and accurate connection work is possible without the need for

In addition, in order to remove the reaping section from the machine base, simply remove the stopper, remove the connection between the tip link rod and the lower frame of the reaping section, and then flip the machine base. can be released.

(F) Effect According to this invention, a bearing recess opening toward the reaping section is provided at the upper end of the machine frame provided on the machine stand, and the shaft case of the reaping section is fitted into the bearing recess, and the machine stand, A four-bar link mechanism consists of a base link rod, a tip link rod, and a hydraulic cylinder.In particular, the tip link rod is pivotally connected to the lower frame of the reaping section, and the tip of the heavy hydraulic cylinder is attached to the tip link rod. By pivoting in the middle, the position adjustment range of the tip of the tip link rod is widened, and there is no need to move the reaping section, and connection with the machine base can be done easily and accurately. In addition, when attaching and detaching the reaping section from the machine stand, it is not necessary to lift the reaping section, which is a heavy object, so there is no need for tools for lifting heavy objects such as jacks, and the connection between the reaping section and the tip of the tip link is eliminated. Furthermore, since the tip of the hydraulic cylinder can be lifted lightly by lever action, there is an effect that the work of attaching and detaching the reaping section becomes safe and easy.

In addition, when removing the reaping section and attaching an attachment such as a snow shovel in its place, these attachments and detachments can be done safely and easily, greatly simplifying the assembly process for the entire combine for manufacturers. effective.

(G) Example The example of the present invention will be explained in detail based on the drawings.
A indicates a combine harvester, a is a reaping part,
b indicates the main machine, and the reaping section a is connected to the front of the main machine b.

The reaping section a consists of a grass cutting body 1 at the front end, grain culm lifting tines 2 behind it, a cutting blade 3 behind it, a conveyance mechanism 4, etc. connected to a reaping frame a', and this machine b. The machine has a control section 5 on the front side, a threshing section 6 behind it, and a running section 7 below it, and the reaping section a and the machine b are connected in the following structure. ing.

That is, the upper part of the reaping frame a' of the reaping section a is connected via the shaft case 8 to the upper part of the machine frame b' which stands upright above the front part of the machine stand b-1 of the machine b, and the coaxial case 8
This section is used as the swinging fulcrum of the reaping section, and a connecting link 9 is connected to the lower part of the machine frame b' of the machine b, and the base end of the connecting link 9 is rotated to the machine frame b. A base link rod 9-1 is freely pivoted, and the base end of a tip link rod 9-2 is rotatably connected to the tip of the base link rod 9-1. The lower frame 11 of the reaping section a is rotatably attached to the tip, so that the entire reaping section a can be attached to and removed from the machine base, and the middle part of the tip link rod 9-2 is connected to the base. A hydraulic cylinder 10 is interposed between them, and the reaping section a is raised and lowered by the expansion and contraction of the cylinder 10.

A reaping rotation shaft 8-1 is housed in the shaft case 8, and from the reaping rotation shaft 8-1 there are a right pulling drive shaft 8-2, a drive shaft 8 for upper conveyance, and lower conveyance. -3, vertical conveyance drive shafts 8-4 are interlocked with each other, and the ends of the reaping rotation shafts 8-1 are configured to receive power from a driving section.

The shaft case 8 having such a configuration is fitted into the bearing recess 13 connected to the machine frame b', and the shaft case 8 has the following features:
It is rotatably pivoted in the coaxial recess 13.

A locking pin 14 serving as a dislodgement stopper for the coaxial case 8 is inserted into the opening of the coaxial bearing recess 13 in a direction perpendicular to the shaft case 8 .

15 is an end side wall forming the bearing recess 13, and the side wall 15 is provided with an insertion hole 16 through which the locking pin 14 is inserted.

17 is a bolt 1 attached to the outer end surface of the side wall 15 at the same end.
This is the pin locking plate attached at 8, and the same locking plate 17
is provided with an insertion hole 19 through which the locking pin 14 is inserted, and a notch 21 is connected to the insertion hole through which a locking protrusion 20 protruding from a portion of the peripheral wall of the locking pin 14 is inserted. , once the locking pin 14 is inserted,
The locking protrusion 20 is configured to abut against the pin locking plate 17 to prevent it from being accidentally removed.

22 is a pin fixing ring connected to the locking pin 14, the base end of the ring is pivotally connected to this part of the locking pin 14, and the pivoted part has a spring function to tilt it to a certain position. The locking pin 14 is configured so that it tends to tilt, and when it is raised to a certain position, it tends to be raised, and the locking pin 14 is prevented from rotating in the tilted state.

In addition, the tip of the tip link 9-2 of the connecting link 9 and the lower frame 11 of the lower part of the reaping frame a' of the reaping part a
The connection is made at a connecting portion 12, which is removably connected with a bolt or the like.

The embodiment of the present invention is constructed as described above, and in order to remove the reaping part a from the machine b, the hydraulic cylinder 10 is shortened, the reaping part a is lowered to the ground, and the locking pin 14 is removed. By simply removing the tip link 9-1 from the reaping section a and backing up the machine b, the shaft case 8 can be easily removed from the bearing recess 13, and the connection between the machine b and the reaping section a can be released. can.

To attach the reaping section a, move the machine b forward and insert the shaft case 8 of the reaping section a into the bearing recess 13.
The machine b and the reaping section a can be easily connected by simply inserting the locking pin 14, and connecting the tip link 9-2 to the reaping section a.

As mentioned above, the reaping section a can be attached and detached without lifting the reaping section a, which is a heavy object, making the work safer and eliminating the need for heavy lifting tools such as jacks. , attachment and detachment work is extremely easy.

In particular, in order to raise and lower the reaping section, the lower frame 11 of the reaping section a is attached to the tip of a four-bar linkage mechanism consisting of the machine b, the base link 9-1, the distal link 9-2, and the hydraulic cylinder 10. I try to make it pivot.

In addition, since the hydraulic cylinder 10 is telescopic, the position adjustment range of the tip of the tip link 9-2 that is pivotally connected to the lower frame 11 of the reaping section a is wide.
The distal end link 9-2 can be easily attached and detached without requiring any movement or other work.

Further, since the tip of the heavy hydraulic cylinder 10 is pivotally attached to the midway portion of the tip link 9-2, it can be lifted lightly by lever action, and the connection work can be easily performed.

Further, as shown in FIG. 2, the reaping section a can be removed and a snow shoveling device C can be attached in its place.

The snow shoveling device C has a snow shoveling plate C-1 at the front end, an upper lever C-2 and a lower lever C-3 are connected to the rear thereof, and a pivot C-4 is attached to the base end of the upper lever C-2. The same pivot C-4 is fitted into the bearing recess 13 of the machine frame b' and fixed with the locking pin 14, and the lower rod C-3
is connected to the connecting link 9 of the machine frame b' at the connecting portion C-5.

The embodiment of this invention is constructed as described above, and when used as a combine harvester for reaping work, the reaping section a of the machine b is connected and the traveling section 7 of the machine b is connected to the harvester. Reaping work, threshing, and sorting work are performed while traveling, and the raising and lowering of the reaping part a is performed by rotating the upper shaft case 8 of the reaping frame a' as a swinging fulcrum using a hydraulic cylinder 10. When removing the reaping part a, raise the pin fixing ring 22, make the locking pin 14 freely removable, remove it from the insertion hole 19 of the pin locking plate 17, and remove the bearing. The recess 13 is partially opened, the shaft case 8 is separated from the bearing recess 13, the connection part 12 is disconnected, and the upper and lower parts of the reaping frame a' are disconnected. b
When installing the snow shovel device C on the upper lever, the pivot C-4 of the upper lever of the snow shovel device C is inserted into the bearing recess 13 and fixed with the locking pin 14 to connect the snow shovel device C, and the lower lever of the snow shovel device C is attached to the connecting link. 9, snow shoveling work is carried out by the traveling operation of this machine b, and the efficient snow shoveling work is accomplished by the up and down movement of the hydraulic cylinder 10.

[Brief explanation of the drawing]

FIG. 1 is a side view of the combine harvester of the proposed mechanism. FIG. 2 is a side view of another usage example. FIG. 3 is an enlarged sectional view of the main part of FIG. 1. FIG. 4 is a sectional view taken along the line of FIG. 3. FIG. 5 is a sectional view taken along the same line. 6th
The figure is an explanatory cross-sectional view taken along the line of FIG. 1. A: Combine harvester, a: Reaping section, b: This machine, b':
machine frame, 8: shaft case, 9: connecting link, 91: base link, 92: tip link, 10: hydraulic cylinder, 11: lower frame, 13: bearing recess.

Claims (1)

[Scope of utility model registration request] A bearing recess 13 that opens toward the reaping part a side is provided at the upper end of the machine frame b' provided on the machine stand side, and the shaft case 8, which serves as the rotational fulcrum of the reaping part a, is rotated in the recess 13 via a retaining fitting. The lower frame 11 of the reaping section a is movably and removably mounted horizontally, and the connecting link 9
The connecting link 9 is connected to the front of the machine frame via a base link rod 9-1, and a base link rod 9-1 whose base end is rotatably pivoted to the machine frame b. The lower frame 11 of the reaping section a is rotatably connected to the tip of the distal link rod 9-2, and the reaping section The entire a is configured to be removable from the machine base, and
A reaping section connecting mechanism for a combine harvester, in which the reaping section a is configured to be able to be raised and lowered by a hydraulic cylinder 10 interposed between the midway portion of the tip link rod 9-2 and the base.