JPS5818654Y2 - Reaping section lifting device in a reaper - Google Patents

Description

[Detailed description of the invention] This invention is used, for example, when adjusting and fixing the height of the cutting section of a combine harvester above the ground depending on the working conditions. A ratchet mechanism that engages and holds the reaping section at multiple positions in the vertical direction is configured between the lifting arm on the reaping section side, which is connected to the machine so as to be able to ascend and descend, and the fixed section on the machine side. This invention relates to a reaping section lifting device for a reaping machine.

The reaping unit lifting device used in this type of reaper has a mechanism that locks and holds the reaping unit at multiple height positions in the vertical direction. Since it uses a ratchet mechanism that is easy to form in a state, it is possible to change the height of the cutting section above the ground in minute increments, which is very convenient for adjusting the cutting height. The resultant force is weak, and vibrations of the machine during reaping work or transport by truck may cause the ratchet mechanism's four moving pawls to unexpectedly disengage from the engagement groove of the stationary rack, causing the reaping to occur. There is a drawback that the position of the part tends to change unexpectedly.

As a measure to eliminate such drawbacks inherent to the ratchet mechanism, between the movable pawl of this ratchet mechanism and its disengagement operation piece, the movable pawl engages with an arbitrary engagement groove of the fixed side rack. A method of configuring a tension relink mechanism that restricts the movement of the claws and locks the raising and lowering of the reaping section in this state has been considered. Even if the movable claw tries to disengage from the engagement groove due to the above-mentioned mechanism, the tensioning action of the link mechanism prevents the movable claw from moving from the engagement position to the disengagement direction, and the reaping section is kept at the desired height position. Certainly,
On the other hand, even when the reaping section collides with a ridge or a raised part of the ground and an upward impact force is applied to the reaping section, the tension link mechanism allows the movable claw to Since the engagement between the groove and the engagement groove is strongly maintained, this impact force directly acts on the reaping section, the ratchet mechanism, etc., causing deformation or damage.

In view of the above-mentioned circumstances, the present invention reliably prevents positional fluctuations of the reaping section caused by vibrations of the machine during reaping work or transport by truck, while also ensuring that the reaping section does not touch the ridges or ground. When colliding with a raised part, the reaping part can be raised as quickly as possible to avoid it,
The reaping unit is placed in multiple positions in the vertical direction between the lifting arm on the reaping unit side, which is connected to the machine so that it can be raised and lowered by vertical swinging around the horizontal axis, and the fixed part on the machine side. A ratchet mechanism is configured to engage and hold the ratchet mechanism, and between the movable pawl of this ratchet mechanism and its engagement/disengagement operation piece, the pawl is engaged with an arbitrary engagement groove of the fixed side rack. A tension link mechanism that restricts the movement of the claws and locks the raising and lowering of the reaping part is configured, and a button is pressed on the reaping part lifting device of the reaper, and the rack is applied with a force above a certain level through the claws. One end of the rack is pivotally supported on a fixed part of the machine so that the claw is automatically released from the groove when the rack is engaged, and the other end of the rack and the machine An ammunition is loaded between each rack and the fixing part on the side, and one rack is elastically biased toward the engagement side with the claw, and the rack and the fixing part are further provided with a force that allows the rack to swing in the distance direction with respect to the claw. The present invention is characterized by being provided with a swing range regulating section that limits the swing range within a certain range.

As a result, even if the movable pawl of the ratchet mechanism attempts to disengage from the engagement groove of the stationary rack due to vibration of the button during reaping work or transport by truck, the movable pawl will not engage from the engaging position. Movement in the release direction is prevented by the tensioning action of the link mechanism, and the reaping section can be reliably and strongly locked and held at a desired height position. When a force exceeding a certain level is applied, the rack can be moved away from the locking groove against the elastic force, and the locking between the movable claw and the locking groove of the rack can be automatically released. Therefore, if the reaping section collides with a ridge or a raised part of the ground and a large upward impact force is applied to the reaping section, the reaping section should be raised as quickly as possible to avoid it, and the reaping section or ratchet should be This made it possible to suppress deformation and damage to the mechanism.

As mentioned above, when the reaping part collides with a ridge or a raised part of the ground and an upward dog impact force is applied to the reaping part, the rack that is pivotally supported on the machine body releases the dog impact force. This is due to the retreat of the rack against the elastic force of the bullet, and the rocking of the rack toward the claw due to the bullet is also due to the action of the swing range regulating part provided on each of the rack and the fixed part. The extraction is limited to a certain range, and although I chase the claws that move in the direction and press them with strong force all the time, it is not 7, so I have to use several operating tools to engage the claw racks on the operating lever for raising and lowering the reaping section. The operation of inserting and extracting from the mating groove can be easily performed with light force, regardless of the pressing force of the bullet, which has a strong elastic force to increase the certainty of engagement between the claw and the rack. It's extremely nice.

Embodiments of the present invention will be described below based on the drawings.

The drawing shows a machine equipped with a crawler device 1, a threshing device 2, etc., which first raises the planted culm to an almost upright position and harvests it, and then gradually changes the position of the reaped culm to a horizontal position. However, the main part of the combine harvester is shown in which the threshing feed chain of the threshing device 2 is connected so that the reaping part 4 that is conveyed and supplied to two people can be raised and lowered by vertically swinging around the horizontal axis 8. - The vertical movement of the reaping frame 6 of the reaping section 4, which is pivotally supported to the traveling mission case 5 around the horizontal axis 8 so that the reaping frame 6 of the reaping unit 4 can be vertically oscillated, A lifting arm 7 that swings up and down around a different axis near the moving axis a is provided, and a free end portion of the lifting arm 7 that swings up and down in a perverse manner with respect to the reaping frame 6, A ratchet mechanism 8 (7) iU movable pawl is configured between the corresponding fixing part 3A on the main side of the machine and the ratchet mechanism 8 (7) that engages and holds the reaping part (at multiple positions in the vertical direction). 9 and a disengagement operating piece 11 of an operating device 10 capable of switching the ratchet mechanism 8 between an engaged state and a disengaged state.
A tension member is provided between the movable claw 9 and the tension member 9, which restricts the movement of the claw 9 and locks the raising and lowering of the reaping part 4 in a state where the movable claw 9 is engaged with an arbitrary engagement groove 12A of the rack 12 provided on the fixed part 3A. It constitutes a link mechanism 13.

The ratchet mechanism 8 has the movable pawl 9 that can be swingably switched between an engagement posture and a disengagement posture in which it engages with the engagement groove 12A of the stationary rack 12. , which is pivotally supported on the free end of the lifting arm I and is pivotally supported on the lifting arm 7 in a state in which it is interlocked and connected to the movable claw 9 via the interlocking link 14 of the tension link mechanism 13. Using the disengagement operation piece 11, the movable claw 9
A spring 15 is provided to swing the parts into an engaged state.

The operating device 10 is configured to set an operating tool 18 in several stages on a reaping section lifting/lowering operating lever 17 connected to a lifting case 16 of the reaping section 4, and to connect this operating tool 18 and the disengagement operation piece 11. They are configured to be interlocked and connected via a wire 19.

The tension link mechanism 13 is connected to the ratchet mechanism 8.
When the movable pawl 9 is in the engagement position, the interlocking link 1
4, the pivot connection points 20 and 21 between the movable claw 9 and the disengagement operation piece 11, and the swinging pivot point 22 of the disengagement operation piece 11.
and are arranged in a straight line, the engagement release operation piece 1
A stopper 23 is provided to prevent the movement of the movable claw 9 from the engagement position, thereby preventing the movable claw 9 from swinging from the engagement position to the disengagement direction by the tensioning action of the interlocking link 14.

The lower end of the rack 12 is pivoted to the fixed part 3A on the side of the machine 3 so as to be swingable around the horizontal axis C.
2 is pivotally connected near the upper end of the bolt 24.
5 and 25, and in the above example, the bolt 24
The spring retainer fixed to the member 26A and this bolt 2
A spring 27, which is an example of a spring for moving and urging the rack 12 toward the movable claw 9, is interposed between the spring receiver and the member 26B. When a force above a certain level is applied to the rack 12 via the movable claw 9
The rack 12 is configured to swing against the elastic force of the spring 270 so that it is automatically disengaged from the engagement groove 12A of the rack 12.

Also, the engagement groove 12A of the fixed side rack 12...
Among them, those that engage and hold the reaping section 4 toward the descending region are formed in large numbers with close spacing, while those that engage and hold the reaping section 4 toward the ascending region are formed with coarser spacing. The engagement groove 12A, which is formed with a button and for engaging and retaining the reaping section 4 in the ascending region, has an engagement groove 12A when an upward force of a certain level or more is applied to the reaping section 4. , a play space 12a is provided which allows the reaping part 4 to escape upward while the movable claw 9 is held in the engaged position.

The reaping section 4 is provided with a spring 29 that applies an upward force to the elevating arm 7 via a folding link 28, in order to suppress the descending action due to its own weight.

A longitudinally intermediate portion of the stationary side rack 12 is pivotally connected to the stationary part 3A side via an elongated hole 30 and a pin 31,
Therefore, it is possible to allow the fixed rack 12 to swing relative to the movable claw 9 in the far and near directions, while restricting the swing within a certain range, and it is also effective in preventing the fixed rack 12 from swinging laterally in the left and right directions. The swing range defining portions 30 and 31 are configured as follows.

[Brief explanation of the drawing]

The drawings show an embodiment of a reaping section lifting device for a reaping machine according to the present invention, and FIG. 1 is a side view of the main parts of the combine harvester, and FIG.
The figure is an enlarged partially cutaway side view of the main part.

Claims (1)

[Scope of utility model registration request] The elevating arm 7 of the reaping section 4'11, which is connected to the machine iK so that it can be raised and lowered by vertical swinging around the horizontal axis, and the machine
A ratchet mechanism 8 that engages and holds the reaping section 4 at multiple positions in the vertical direction is configured between the fixed section of the HJ, and a movable pawl 9 of this ratchet mechanism 8 and an operation piece for disengaging it. 11, the claw 9 is connected to the fixed side rack 12.
A tension link mechanism 13 that restricts the movement of the claws 9 and locks the raising and lowering of the reaping section 4 when engaged with an arbitrary engagement groove 12A of the reaping section is configured as a button on the reaping section elevating device of the reaping machine. , one end side of the rack 12 is held in place [3 (
It is pivotably supported on the fixed part 3A of 1111, and
A bullet 27 is interposed between the other end of this rack 12 and the fixed part 3A of the machine 3 (jllJ) to elastically force the rack 12 toward the engagement side with the claw 9. The fixed part 3A includes swing range regulating parts 30 and 31 that limit the swing of the rack 12 in the distance direction with respect to the claw 9 within a certain range.
A reaping part lifting device for a reaping machine, characterized in that it is provided with: