JPS5812569Y2 - Fixing device for hydraulic operating lever in combine harvester - Google Patents

Description

[Detailed description of the invention] The present invention includes, for example, a lifting cylinder that adjusts the cutting height of the husk culm, and a cylinder for long and short culms that adjusts the handling depth of the husk culm. The present invention relates to a device that keeps the depth of handling constant at all times.

Conventionally, a lever was provided to adjust the cutting height of the shell culm and a lever to adjust the handling depth of the shell culm, so it was necessary to install the lever in addition to the various levers on the operation control section. As the number of cutting blades increases and each adjustment operation for the same purpose is performed using two levers, it is difficult to easily adjust the cutting height and handling depth, which must be performed in a correlated manner.

In addition, when each adjustment of cutting height and handling depth is done with a single lever,
It is necessary to be very careful when handling the lever, and there is a fear that, for example, erroneous operation of the lever may lower the reaping device and damage it.

Therefore, the present invention provides a single operating lever that can be switched in the front-back or left-right direction to adjust the cutting height or cutting depth, and also connects a cutting height switching member and a cutting depth switching member to the lever, respectively. In the structure, a fixing member that engages and disengages from the operating lever is attached to a lever guide plate having a guide groove, and the fixing member is engaged with the operating lever to restrict at least the lowering of the reaping and the movement of the lever in the planing direction. By doing so, when the reaping unit, etc. is kept raised, for example, even if the operator carelessly operates the lever, the lever operation in the lowering direction of the reaping direction is blocked and the lowering of the reaping device is prevented. Therefore, in the combine harvester, the work is safe and reliable, and the lever can be easily engaged and disengaged, and in an emergency, the lever can be easily removed from the fixed member and operated in the upward direction of reaping. It is possible to provide a fixing device for a hydraulic operating lever.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Figure 1 is a side view of the combine, Figure 2 is its top view,
In the figure, 1 is a machine base, 2 is a track frame equipped with a pair of running rollers 3, 3 on both left and right sides, and 4 is a track frame that supports the machine base 1 against the track frame 2 when turning the machine base 1, etc. 5 is a lifting cylinder that lifts the front part of the machine 1 upward using the pivot shaft 4 as a fulcrum; 6 is a cylinder mounted on the machine 1; This threshing machine has a handling barrel 7 mounted therein along a shaft along the longitudinal direction of the machine stand 1.

Reference numeral 8 denotes a reaping device for multi-row mowing, which is provided with a plurality of grass division plates 9 . . . and a cutting blade 10.

Reference numeral 11 denotes a husk culm transfer device, which includes a feed chain 12 and a culm rod 13, and is installed along the handling opening (not shown) of the threshing machine 6.

Further, 14 is a driver's seat, 15 is an operation control unit, 16 is a grain pedestal facing upward from the grain frying conveyor device 17 for taking out fine grains from the first mouth, and 18 is a rear part of the threshing machine 6. 19 is a straw removal chain extending from the terminal end of the feed chain 12 to the upper part of the cutter of the straw removal cutting device 18; 20 is a cover for the chain 19;

Further, 21 is an engine mounted on the machine base 1, and 22 is a driving sprocket for the traveling roller 3, which is connected to the traveling transmission.

Further, 23 is a roller 3 running together with the sprocket 22.
24 is a carrier roller 25 which is brought into sliding contact with the upper inner surface of the running roller 3;
... are a plurality of track rollers that are brought into sliding contact with the lower inner surface of the running roller 3.

Furthermore, 26 is a suction/discharge seat device whose suction port is opened toward the sorting air path, 27 is an inlet supply plate provided at the lower part of the handling chamber of the threshing machine 6, and 28 is a handling barrel pulley cover.

Next, to explain the shell culm conveying device, a raking drum 29 is installed above the cutting blade 10 in the reaping device 8.
The scraping drum 29 is equipped with a star wheel 30 for scraping the root side of the culm, which can be rotated freely.

Each star foil 30 has left and right culm lifting devices 31,
32, and a sprocket (not shown) for driving the lower conveyor chains 33, 33 is provided coaxially with these star wheels 30 to constitute the left and right lower conveyor devices, and the culm The structure is such that the culm part of the culm is held and conveyed.

Furthermore, left and right upper conveying devices 34° 34 for pinching and conveying the tip side of the culm are extended above the left and right lower conveying devices,
With the conveying tines 34a of this device 34.34 exposed in a protruding manner toward the culm conveying path, the upper conveying device 34.34 is covered with the upper conveying left cover 35 and the upper conveying layer cover 36, respectively. There is.

The starting end of a vertical conveying device 37 whose length can be adjusted is exposed behind the upper conveying device 34° 34, and its terminal end extends toward the starting end of the feed chain 12. ing.

Further, a detection device 3 is provided on the inner surface of the handling cylinder pulley cover 28.
8.39 is attached, and these devices 3B and 39 detect the handling depth of the culm inserted into the handling chamber and vary the inclination angle of the vertical conveyance device 37 via a hydraulic circuit.

In addition, in FIGS. 1 and 2, 40 is the fourth turret upper cover, 41 is an air cleaner, 42 is an engine dust prevention device,
43 is a fuel tank, 44 is a dust feed adjustment lever, 45 is an auxiliary conveyance device, and 46 is a reaping latch lever.

Next, an oil tank 47 is installed on the left side of the driver's seat 14, and a housing 48 is provided on the side wall of the tank 47. As shown in FIG. A directional control valve 63 for adjusting the cutting height by raising and lowering the vertical conveyor 37 as appropriate, and a directional control valve 64 for adjusting the handling depth by appropriately swinging the vertical conveying device 37 are built in. As shown in the figure, the rotary shaft 51 of the hydraulic pump 62 is protruded, a pulley 49 is fitted onto it, and a belt 50 is stretched around the pulley 49 to operate the hydraulic pump 62. Hydraulic pressure is supplied to the lifting cylinder 5 and the cylinder 65 for long and short culms through the cylinders 63 and 64 to lift and lower the reaping devices 8 and the vertical conveyance device 37.
It is formed to perform horizontal swinging.

Further, a plate 53 is provided on the left side wall of the housing 48 so as to be swingable via a pin 52, and a hydraulic operating lever 54 is connected to the plate 53. By operating this lever 54 to move the machine back and forth, the pin 52 The plate 53 is swung as a fulcrum, and the spool 55 of the directional control valve 63, which is a cutting height switching member, is appropriately switched so that the cutting height can be adjusted by raising and lowering the cutting device 8.

Further, a vertical conveyance device 3T is provided outside the upper part of the housing 48.
A switching lever 5, which is a handling depth switching member that swings left and right.
6 protrudes, and by operating the operation lever 54 to move the machine to the left and right, the directional control valve 64 for adjusting the handling depth is appropriately switched via the switching lever 56, and the vertical conveyance device 37 is swung left and right to move the shell. It is configured to adjust the depth of handling of culms.

Further, a lever guide plate 57 of the hydraulic operating lever 54 is fixed to the upper part of the oil tank 47.
the guide plate 57 is provided at an angle with respect to the mounting of the guide plate 57;
The guide plate 57 has a guide groove 5 for guiding the lever 54.
8 is formed.

The guide groove 58 is bored in a "+" shape as shown in FIG. 4, and this central crossing position is the neutral position of the lever 54, and the guide groove 58 in the longitudinal direction of the machine body is used to adjust the cutting height of the lever. , the guide grooves 58 in the left and right directions of the machine body are configured to be used for adjusting the handling depth.

Further, a fixing member 59 having an engagement groove 59a for fixing and holding the lever 54 at the neutral position is attached via a hinge 60 near the neutral position of the lever 54 on the guide plate 57, and the operating lever 54 During the operation movement, the fixing member 59 is reversed via the hinge 60, and the fixing member 59 is separated from the center position of the guide groove 58 as shown by the imaginary line in FIG. 4, so that the lever 54 is free to move. On the other hand, when the lever 54 is held in the neutral position, the engagement groove 59a of the fixing member 59 is engaged with the lever 54, and the lever 54 is kept fixed at the intersection of the guide grooves 58, and the guide groove The engagement groove 59a is opened in the reaping upward direction and the deep handling direction of 58, and the lever 54, which moves in the reaping downward direction and the planing direction, is further engaged in the engagement groove 59a, and the fixing member is attached to the lever 54. 59 is engaged to restrict the lowering of the lever 54 for reaping and the displacement in the direction of planing.

Note that the fixing member 59 is attached to the lower left position of the guide plate 57 shown in FIG. The lower claw portion 5 of the claw portions 59b, 59b forming this engagement groove 59a faces the rising side groove of No.8.
A leaf spring 61 is provided protruding from 9b, and when the lever 54 is kept fixed at the neutral position, the lever 54 is slid only toward the rear of the machine body against the leaf spring 61 if necessary, and the reaping device 8 is raised. are doing.

FIG. 5 is a hydraulic circuit diagram for controlling cutting height and handling depth, in which the lifting cylinder 5 is connected to the hydraulic pump 62 via a 3-position, 4-boat type directional control valve 63.
A length shifting cylinder 65 is connected to the pump 62 via the control valve 63 and a three-position, four-port type directional control valve 64.

Further, in the vertical conveyance device 37, a first connecting rod 66 is connected to the intermediate pivot portion 37a, and a second connecting rod 66 is connected to the lower end pivot portion 37b.
7 are connected in series, and the intermediate portion of this second connecting rod 67 is connected to the piston rod 68 of the cylinder 65.

The hydraulic operating lever 54 is connected to one direction control valve 63 via the spool 55 and to the other direction control valve 64 via the switching lever 56, so that the lever 54 can be swung in the longitudinal direction of the aircraft. The control valve 63 is switched by the movement, and the cylinder 5 is driven to move the reaping device 8 up and down, while the control valve 64 is switched via the lever 56 by the swinging of the lever 54 in the horizontal direction of the machine body, and the cylinder 65 is driven. The configuration is such that the vertical conveyance device 37 is swung left and right, and the terminal end of the device 3T is brought into contact with and separated from the feed chain 12.

The present invention is constructed as described above, and when the lever 54 is tilted to the rear of the machine to raise the reaping device 8 and travel, etc., when the lever 54 is held in the neutral position by the fixing member 59, the The lever 54 is securely held fixed, and even if an attempt is made to operate the operating lever 54 inadvertently, the lowering operation for reaping is blocked by the fixing member 59,
Therefore, extremely dangerous erroneous operations such as inadvertently lowering the reaping device 8 while driving can be prevented, and if it becomes necessary to raise the reaping device 8 from its current position due to an emergency situation, the lever 54 can be used to raise the reaping device 8 from its current position. When the lever 54 is slid from the engagement position of the fixed member 59 toward the rear of the machine, that is, toward the upward direction of the reaping part, since the lever guide plate 57 is inclined upward to the right, the fixed member 59 is moved upward, that is, the lever 54 The lever 54 is moved away from the fixing member 59, and the leaf spring 61 provided at the entrance of the engagement groove 59a is pushed open, causing the lever 54 and the fixing member 59 to be separated from each other.
The engagement relationship with the reaping device 8 is released, and the reaping device 8 can be quickly raised by operating the lever 54.

Further, in the same way as regulating the operating lever 54 in the lowering direction of reaping, when the operating lever 54 is engaged in the engagement groove 59a of the fixed member 59, the displacement of the lever 54 in the direction of cutting is regulated. This prevents the vertical conveyance device 37 from moving in the direction of crosscutting due to erroneous operation of the lever 54, and prevents dangerous operations such as the vertical conveyance device 37 unexpectedly protruding to the left side of the combine harvester body.

As is clear from the above embodiments, the present invention provides a single operating lever 54 that can be switched in the front-back or left-right direction to adjust the cutting height or handling depth, and also includes a cutting height switching member such as a spool 55 and a switching lever. In the structure in which handling depth switching members such as the control lever 56 are respectively connected to the levers 54, a fixing member 59 that engages and disengages the operating lever 54 is attached to a lever kite plate 57 having a guide groove 59, and The fixing member 59 is engaged to restrict at least the downward movement of the lever 54 for reaping and the movement of the lever 54 in the direction of planing. Even if the lever 54 is operated to lower the reaping lever 54, this operation can be blocked and the lowering can be reliably prevented, and work safety can be ensured. In addition, in an emergency, the lever 54 can be easily removed from the fixing member 59 to raise the reaping section to avoid danger, and the fixing member 59 It has an extremely simple structure and is convenient in practice, and the adjustment of the crosspiece of the lever 54 can be regulated by the fixing member 59 in the same way as the regulation of lowering the harvester, so it is particularly convenient for road running and maintenance work of the combine harvester. This can be done safely and provides remarkable effects such as being able to handle the lever 54 easily and appropriately.

[Brief explanation of the drawing]

FIG. 1 is a side view of a combine harvester showing an embodiment of the present invention;
FIG. 2 is a plan view thereof, FIG. 3 is an explanatory view of the main parts, FIG. 4 is a view taken from the previous time as viewed from the mountain-■ line, and FIG. 5 is a hydraulic circuit diagram for controlling the cutting height and handling depth. 8... Reaping device, 54... Hydraulic operating lever 55... Spool (cutting height switching member), 5
6...Switching lever (handling depth switching member), 57.
... Lever guide plate, 58 ... Guide groove, 59 ... Fixing member.

Claims (1)

[Scope of utility model registration request] A structure in which a single operation lever 54 is provided to adjust the cutting height or handling depth by switching in the front-back or left-right direction, and a cutting height switching member 55 and a handling depth switching member 56 are connected to the lever 54, respectively. , a fixing member 59 for engaging and disengaging the operating lever 54 is attached to the lever guide plate 57 having a guide groove 58, and the fixing member 59 is attached to the operating lever 54.
A fixing device for a hydraulically operated lever in a combine harvester, characterized in that the lever 54 is engaged with the lever 54 to restrict at least the downward movement of the lever 54 for reaping and the movement of the lever 54 in the cutting direction.