JP3828085B2 - Harvester cutting part height detector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a grounding sensor that can swing up and down with respect to a weed frame, and a harvesting part of a harvesting machine that includes a detection unit that detects a ground height of the cutting part based on a swinging angle of the grounding sensor. The present invention relates to a ground height detection device.
[0002]
[Prior art]
In the harvesting machine, a detection device for detecting the ground height of the cutting unit is provided, and when the detected height by the ground height detection device is equal to or lower than the set height, the cutting unit is automatically raised with respect to the traveling machine body. It is configured so that control is executed, or the mowing unit is automatically raised and lowered with respect to the traveling machine body so that the ground height of the mowing unit is within the set range based on the detection result by the ground height detection device. It is configured so that control is executed, and even if the traveling body tilts back and forth, etc., it avoids that the weeding tool of the cutting part thrusts into the ground or maintains the cutting height by the cutting device at the set height It may be possible to work while.
[0003]
A grounding sensor that can swing up and down with respect to the weed frame, and a detection unit that detects the ground height of the cutting part based on the swing angle of the grounding sensor. Conventionally, for example, Japanese Patent Application Laid-Open No. H10-133707 discloses a harvesting unit cutting height-to-ground height detection device for a harvesting machine.
In other words, a saddle-shaped ground contact member as a ground sensor is attached to a weed support rod as a weed frame so that it can swing up and down around the horizontal axis, and it is detected that the ground contact member has swung downward by a certain amount or more. And a switch for detecting that the ground contact member has swung upwards more than a certain level.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 60-5778 (Page 2, Fig. 2-3)
[0005]
[Problems to be solved by the invention]
When the steering operation of the airframe is performed, the cutting unit swings in the lateral direction with respect to the ground, so that the grounding sensor may slide on the ground. When the conventional detection device is used, when the ground sensor slides on the ground, the ground sensor is caught on the bulge or soil block on the ground, and it is easy to apply strong bending force to the ground sensor or sensor support. It was. It was easy to apply excessive force to the detector.
[0006]
An object of the present invention is to provide a harvesting unit height detection device for a harvesting machine in which an excessive force is not applied to the grounding sensor or the like even if the grounding sensor slides on the ground.
[0007]
[Means for Solving the Problems]
The configuration and operation of the invention according to claim 1 are as follows.
[0008]
〔Constitution〕
A grounding sensor that can swing up and down with respect to the weeding frame and a detection unit that detects the ground height of the cutting unit based on the swing angle of the grounding sensor. In the device
A support body rotatably connected to the weed frame around a longitudinal axis of the machine body, and an urging means for urging the support body to a reference rotation position with respect to the weed frame. The grounding sensor so as to rotate with respect to the weed frame around the shaft core together with the support, and to swing up and down with respect to the support in the reference rotation position. The support is supported by the support, and the detection unit is supported by the support so as to rotate with respect to the weed frame around the axis together with the support, and is connected to the support of the ground sensor. A grounding sensor is provided on the rear end side opposite to the side where the grounding sensor is provided, and the grounding sensor is engaged with the latching part to allow the grounding sensor to rotate with respect to the weed frame around the axis. Lateral displacement with respect to the weed frame on the rear end side An engaging portion for regulating are provided on the divided grass frame.
[0009]
[Action]
When the grounding sensor moves laterally on the ground, if a movement resistance is applied, for example, by being caught on a raised portion, the grounding sensor rolls against the biasing means together with the support depending on the magnitude of this resistance. At this time, since the engaging portion engages with the engaging portion on the rear end side of the ground sensor and allows the ground sensor to rotate, the lateral displacement with respect to the weed frame on the rear end side of the ground sensor is restricted. The ground sensor rolls in a state where the rear end side is not greatly displaced from the weeding frame due to movement resistance. At this time, the detection unit also rolls together with the ground sensor. Thereafter, when the rotation operation force is not applied due to the hooking of the grounding sensor being removed, the support body returns to the reference rotation position for the rotation biasing by the biasing means, and the grounding sensor rotates together with the support body. It moves to return to the detection posture. As a result, even if the grounding sensor is caught on the raised part, the grounding sensor and the detection part roll, and the grounding sensor rear end side is supported by the engaging part so that it does not greatly deviate from the weed frame. An unreasonable operating force such as a bending force stronger than the strength determined by the urging force by the urging means is not applied to the grounding sensor or the sensor support unit.
[0010]
〔effect〕
Therefore, even if the ground sensor slides on the ground, it is highly durable so that it will not be subject to excessive bending force on the ground sensor, nor the support part or detection part of the ground sensor, and it will not be deformed or damaged. It will be.
[0011]
The structure and operation of the invention according to claim 2 are as follows.
[0012]
〔Constitution〕
In the configuration of the invention according to claim 1, the lateral width of the locking portion of the ground sensor is made smaller than the lateral width of the grounding action portion.
[0013]
[Action]
Since the engaging portion engages with the locking portion so as to regulate the lateral displacement of the grounding sensor while allowing the rotation of the grounding sensor due to the lateral width difference between the engaging portion and the locking portion, The larger the lateral width of the locking portion, the larger the engaging portion. The wider the width of the grounding action part of the grounding sensor, the more difficult it is for the grounding sensor to sink even in wetlands. As a result, the engaging portion and the engaging portion can be engaged as described above while widening the width of the grounding action portion of the grounding sensor and reducing the size of the engaging portion for the width. It is to make.
[0014]
〔effect〕
Therefore, although it is possible to detect the ground sensor while it is difficult to sink even in wetlands, it is possible to advantageously prevent the lateral displacement on the rear end side of the ground sensor with a small engagement portion.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, a boarding type driving unit that is self-propelled by a crawler type traveling device 1 and equipped with a driving seat 2, and a driving unit that includes an engine (not shown) located below the driving seat 2. The base end side of the pretreatment part frame 11 of the cutting part 10 is connected to the support part 4 positioned at the front part of the body frame 3 of the self-propelled machine body having A threshing device 5 and a grain tank 6 are provided on the rear end side of the machine body frame 3 to constitute a combine.
[0016]
This combine harvests grains such as rice and wheat. When a hydraulic lift cylinder 8 having a cylinder rod connected to the pretreatment section frame 11 via a link mechanism 7 is operated, the lift The cylinder 8 swings up and down the pre-processing unit frame 11 and moves up and down to a working position where the mowing unit 10 is lowered to near the ground and a raised non-working position which is raised above the ground. When the cutting unit 10 is moved to the descending work position and the self-propelled machine is driven, the cutting unit 10 divides the planted stems to be cut by the plurality of planting strips by the plurality of weeding tools 12 arranged in the horizontal direction of the machine. Are guided to corresponding ones of the plurality of pulling devices 13 arranged in the lateral direction of the machine body, are lifted by the pulling claws (not shown) of the pulling devices 13 and processed by the clipper-type cutting device 14. Mowing and harvesting cereals are conveyed to the rear side of the machine body by a conveying device 17 including a holding conveying device acting on the stock side and a locking conveying device acting on the tip side, and the threshing device 5 is harvested from the conveying device 17 While the rice bran is transported backward by the threshing feed chain 5a, the tip side is supplied to the handling room (not shown) and threshing is performed, and the grain tank 6 collects and stores the threshing grains from the threshing device 5. To go.
[0017]
The mowing unit 10 will be described in further detail as shown in FIGS.
That is, a main frame 11a composed of a transmission case in the front-rear direction of the fuselage whose base end side is rotatably connected to the support portion 4 of the fuselage frame 3, and an intermediate portion connected to the distal end of the main frame 11a. The pre-processing unit frame 11 is configured by a horizontal transmission case 15 or the like. The weeding frame 16 is extended forward from the plurality of locations in the lateral direction of the body of the support member 15a provided in the lateral transmission case 15, and the grain is raised by a pair of adjacent weeding frames 16 to cause the grain culling. 18, the weeding tool 12 is fixed to the tip of each weed frame 16, the grain raising unit 13 is disposed on the side of each grain raising path 18, and the plurality of weed frames 16 are arranged. The reaping device 14 is attached over the base end portion.
[0018]
As shown in FIG. 2, the grounding sensor 21 is used to place the cutting unit 10 on the slightly rear side of the weeding unit 12 located on the outermost side of the body among the plurality of weeding units 12 of the cutting unit 10. A cutting portion ground height detection device 20 for detecting the ground height is provided. As shown in FIG. 9, the cutting means provided in the electromagnetic operating part and operating part of the control valve 31 of the lift cylinder 8 is connected to the control means 30 in which the detecting part 22 of the cutting part ground height detecting device 20 is linked. The setting means 32 is linked.
[0019]
The cutting height setting means 32 is composed of a potentiometer that can be operated manually, and the cutting height of the cutting device 14 to be maintained by cutting height control is set to be freely changeable, and this setting cutting height is set as an electrical signal to control means. 30 is output.
[0020]
The control means 30 is configured by using a microcomputer, and automatically cuts the lift cylinder 8 based on information detected by the cutting unit height detection device 20 and setting information by the cutting height setting means 32. Height control is to be executed.
That is, when the height detected by the cutting unit ground height detection device 20 deviates from the set cutting height by the cutting height setting means 32, the lift cylinder 8 is output by outputting a signal for causing the control valve 31 to operate the lift cylinder 8. Is moved to the ascending or descending side of the cutting unit 10, and for this reason, the cutting unit 10 rises or descends, and the cutting unit ground height detection device 20 corresponds to the set cutting height by the cutting height setting means 32. When the ground height is detected, a signal to stop the lift cylinder 8 is output to the control valve 31 to stop the lift cylinder 8 and stop the lifting and lowering of the cutting unit 10. Yes.
[0021]
Thus, when the harvesting operation is performed, if the cutting height control by the control unit 30 is switched on, the height detected by the cutting unit ground height detection device 20 becomes the set cutting height by the cutting height setting unit 32. The cutting height control for automatically raising and lowering the cutting unit 10 is performed so that the ground height of the cutting device 14 is set even if the self-propelled aircraft tilts in the front-rear direction due to unevenness or inclination of the traveling ground. It can be maintained at or close to the height, and the stump can be operated at or near the set cutting height.
[0022]
The lift lever 34 shown in FIG. 9 is provided so as to be manually operated by the driving unit. When operated, the lift lever 34 outputs a command to raise or lower the cutting unit 10 to the control means 30 to raise or lower the cutting unit 10. It is to be operated. That is, the mowing unit 10 is manually raised and lowered. When the raising / lowering lever 34 is operated to input an ascending or descending command, the control means 30 switches the control valve 31 in preference to the detection result by the reaping portion-to-ground height detection device 20 and operates the lifting cylinder 8 as the reaping portion. 10 is operated to the ascending side and descending side.
[0023]
As shown in FIGS. 2, 3, etc., the mowing unit ground height detection device 20 is positioned on the outermost lateral side of the aircraft on the opposite side of the plurality of weeding tools 12 from the side where the driving unit is located. Near the rear side of the weeding tool 12, the support 25 attached near the tip of the weeding frame 16 that supports the weeding tool 12, and the lateral side surface of the lower part of the support 25 is connected to the base end side. The grounding sensor 21 and the detection unit 22 attached to the lateral side of the upper portion of the support 25 are configured.
[0024]
As shown in FIGS. 3 and 4, the support body 25 includes a sheet metal mounting member 50 having pin-shaped mounting portions 51 and 52 on the front and rear sides, and both the mounting portions 51 and 52 of the mounting member 50. And a gear case 40, one side of which is screwed and connected between 52, and a bent round bar is connected to the tip of the round steel pipe constituting the proximal end portion 16a of the weed frame 16 Thus, the two attachment portions 51 and 52 are connected to a bent portion 16b provided at the tip of the weed frame 16. That is, the mounting portion 51 on the front side is rotatably mounted in a mounting hole of a front support portion 16c provided by attaching a cylindrical body to the lower portion of the vertical portion of the body at the front end side of the bending portion 16b. The rear attachment portion 52 is rotatably attached to an attachment hole of a rear support portion 16d provided with a bracket attached to the lower portion of the upper and lower part of the machine body on the end side, thereby being connected to the bent portion 16b. Thereby, the support body 25 is configured to rotate with respect to the weed frame 16 around the longitudinal axis Y located on the axis of the mounting portions 51 and 52. The bent portion 16b bypasses the support body 25 to the upper side of the machine body.
[0025]
As shown in FIG. 10 and the like, the grounding sensor 21 is provided with a grounding action part 21a that protrudes downward from the front end part 21b and the rear end side at the middle part so that the attachment piece part 21c is provided at the front end side. It is composed of a bent leaf spring. As shown in FIG. 3 and the like, the grounding sensor 21 is supported by the support 25 by connecting the mounting piece 21c to the input shaft 41 of the gear case 40 of the support 25 so as to be integrally rotatable. As a result, the ground sensor 21 swings with respect to the support 25 around an axis X that is an axis of the input shaft 41 and is orthogonal to the rotation axis Y of the support 25. In addition to the support body 25, the forward rotation direction A shown in FIG. 5 (b) and the reverse rotation direction B shown in FIG. It is designed to rotate.
[0026]
As shown in FIGS. 3 and 5, a spring stopper portion 16e arranged so as to be inserted between both end portions 61 and 62 of a winding spring 60 in which a coil portion is fitted on the front mounting portion 51 is provided as a weed. A spring operation pin 53 provided on the bent portion 16b of the frame 16 and arranged so as to enter between the spring end portions 61 and 62 at a position closer to the coil portion of the winding spring 60 than the spring stopper portion 16e. The support 25 is fixed to the mounting member 50, and the support 25 is urged to rotate by the winding spring 60 as follows. That is, of the rotation positions around the rotation axis Y of the support 25 with respect to the weed frame 16, the swing axis X of the ground sensor 21 with respect to the support 25 is sideways with the ground sensor 21 being set to the weed. A rotation position that swings up and down around the axis X with respect to the frame 16 is defined as a reference rotation position N (FIG. 5A), and the support 25 is moved from the reference rotation position N in the normal rotation direction A. When the rotation operation force is released, the rotation is biased so that the rotation returns to the reference rotation position N automatically.
[0027]
That is, as shown in FIG. 5B, when the support body 25 is rotated from the reference rotation position N in the normal rotation direction A, one first spring end 61 of the winding spring 60 becomes the spring stopper 16e. While being in contact with and supported, the other second spring end portion 62 is pressed in the positive rotation direction A by the spring operating pin 53 and the winding spring 60 is elastically deformed, and the winding spring 60 causes the support body 25 to move to the reference rotation position N. It is energized so as to return and rotate. As shown in FIG. 5C, when the support 25 is rotated from the reference rotation position N in the reverse rotation direction B, the second spring end 62 of the winding spring 60 comes into contact with the spring stopper 16e to support it. However, the first spring end 61 is pressed in the reverse rotation direction B by the spring operating pin 53 and the winding spring 60 is elastically deformed so that the winding spring 60 returns and rotates the support body 25 to the reference rotation position N. Energize to.
[0028]
As shown in FIG. 7, the detection unit 22 is constituted by a rotary potentiometer whose main body is fixed to the side of the gear case 40 and whose input shaft 22 a enters the inside of the gear case 40.
[0029]
As shown in FIGS. 6 and 7, a fan-shaped gear 42 in which a mounting portion 42 a is externally fitted to the input shaft 41 of the gear case 40, and the input shaft 22 a in a state of being engaged with the fan-shaped gear 42. A gear interlocking mechanism 44 including a circular gear 43 that is externally fitted is provided inside the gear case 40. The mounting portion 42a of the sector gear 42 is engaged with the input shaft 41 so as to be rotatable together with the input shaft 41 because the input shaft 41 has a non-circular cross section. The circular gear 43 is engaged with the input shaft 22a so as to be integrally rotatable because the input shaft 22a has a non-circular cross section. The pitch circle diameter of the sector gear 42 is larger than the pitch circle diameter of the circular gear 43. Thereby, the gear interlocking mechanism 44 increases the rotation of the rotation support shaft 41 that supports the ground sensor 21 so as to be swingable up and down and transmits the rotation to the input shaft 22a of the detection unit 22 so that the input shaft 41 is transmitted. The detection unit 22 is linked to the input shaft 22a.
[0030]
A sensor spring 46 is provided in the gear case 40. The sensor spring 46 is a coil spring with a coil portion fitted on the input shaft 41. This sensor spring 46 oscillates the grounding sensor 21 downward so that the grounding action part 21a of the grounding sensor 21 can reliably ground by rotating and urging the input shaft 41 via the sector gear 42. It is fast.
[0031]
Thereby, the cutting part ground height detection apparatus 20 operates as follows.
That is, in the normal state, the support 25 is in the reference rotation position N because of the winding spring 60, and the grounding sensor 21 swings up and down with respect to the weed frame 16 around the axis X. When the ground height of the cutting part 10 changes and the ground height of the weeding frame 16 changes, the ground sensor 21 causes the ground reaction force acting on the ground action part 21a and the elasticity of the ground sensor 21. Due to the restoring force and the descending force by the sensor spring 45, it swings up and down with respect to the weed frame 16 around the axis X. Then, the rotation of the ground sensor 21 is accelerated by the gear interlocking mechanism 44 and transmitted to the input shaft 22a of the detection unit 22, and the detection unit 22 is activated. Thereby, the ground height of the cutting unit 10 is detected by the detection unit 22 based on the swing angle of the ground sensor 21 with respect to the support 25, and the ground height of the cutting device 14 is detected based on this detection result. The detection result is converted into an electrical signal and output to the control means 30.
[0032]
When the steering operation of the self-propelled aircraft is performed and the cutting unit 10 swings sideways, the grounding sensor 21 is shifted laterally on the ground. At this time, if the grounding sensor 21 is caught on a soil block, the grounding sensor 21 acts on the grounding sensor 21. The grounding sensor 21 rolls against the winding spring 60 around the axis Y along with the support body 25 and the detection unit 22 also rolls together with the support 25, and the detection unit 22 also rolls to the grounding sensor 21, the input shaft 41, or the detection unit 22. An operation force such as an excessive bending force stronger than the strength determined by the urging force of the winding spring 60 is difficult to be applied.
[0033]
As shown in FIG. 2 and the like, a bent round bar material bent into a U shape is attached to the proximal end portion 16 a of the weed frame 16 to provide an engaging portion 65 for the ground sensor 21. As shown in FIG. 8 (a), the engaging portion 65 is provided with a locking mechanism provided on the rear end side of the grounding sensor 21 so that the lateral width W1 is narrower than the lateral width W2 (FIG. 4) of the grounding action portion 21a. 21d is slidably inserted, and the engaging portion 65 is locked by a pair of left and right vertical side portions 65a of the aircraft body, even if the rear end side of the ground sensor 21 tends to be laterally displaced with respect to the weeding frame 16. The lateral displacement is regulated so that the rear end side of the sensor does not move more than the stroke that causes the engagement with the portion 21d and the distance between the vertical sides 65a is larger than the lateral width W1 of the locking portion 21d. It is constituted as follows. Further, the engaging portion 65 can be rotated with respect to the engaging portion 65 because the interval between the vertical side portions 65a is larger than the lateral width W1 of the engaging portion 21d. The grounding sensor 21 is allowed to rotate with respect to the weed frame 16 around the axis Y.
[0034]
That is, the engaging portion 65 is configured to cause the grounding sensor 21 to roll around the axis Y due to the difference between the lateral width W1 of the locking portion 21d and the vertical side portion spacing when a rotational operation force is applied to the grounding sensor 21. While allowing, the rear end side of the grounding sensor 21 is prevented from being greatly displaced with respect to the weeding frame 16 to prevent the grounding sensor 21 from being twisted. In other words, the grounding sensor 21 is prevented from being twisted and an excessive bending force is applied to the grounding sensor 21 and the input shaft 41.
[0035]
As shown in FIGS. 7 and 10, an inclined portion 21 e that is inclined with respect to the front-rear direction of the body is provided at the front end portion of the ground sensor 21. Due to the action of the inclined portion 21e, there is less wrapping between the gear case 40 and the grounding sensor 21 in plan view, and mud is less likely to be clogged between the gear case 40 and the grounding sensor 21, and the grounding sensor 21 has interrupted the stock. When it is difficult to push the planted cereals forward.
[0036]
[Another embodiment]
The lift cylinder 8 is connected to the cutting unit 10 based on the detection result of the cutting unit ground height detection device 20 so that the ground height of the cutting device 14 falls within the set range regardless of the front / rear inclination of the self-propelled aircraft as in the above embodiment. The lift cylinder 8 is configured based on the detection result by the cutting portion ground height detection device 20 so as to prevent the weeding tool 12 from being pushed into the ground. The present invention can also be applied to a configuration in which the automatic operation is performed on the ascending side of the cutting unit 10.
[0037]
As shown in the above embodiment, the cutting unit ground height detection device 20 is disposed behind the weeding tool 12 located on the most lateral side of the machine body on the side opposite to the driving unit, and is located on the most lateral end on the driving unit side. It may be carried out by being arranged behind the weeding tool 12 or behind the weeding tool 12 located on the inner side of the body relative to the weeding tool 12 located at both lateral ends thereof.
[0038]
Instead of the above-described winding spring 60, various spring means such as a leaf spring and rubber may be employed, and these winding spring 60, leaf spring, rubber and the like are collectively referred to as an urging means 60.
[0039]
The present invention can be applied to work vehicles that harvest various crops, such as onions and carrots, in addition to the combine. These work vehicles and combines are collectively referred to as harvesters.
[Brief description of the drawings]
FIG. 1 is a side view of the front part of a combine. FIG. 2 is a perspective view showing a main frame of the cutting unit and a ground height detection device. FIG. 3 is a side view of the cutting unit to ground height detection device. FIG. 5A is an explanatory diagram showing the reference rotation position of the support, and FIG. 5B is an explanatory diagram showing the urging action of the winding spring. FIG. ] Side view of gear mechanism [FIG. 7] Front view of gear case in vertical section [FIG. 8] (a) is a front view of the engaging part, (b) is a cross-sectional view of the grounding action part of the ground sensor [FIG. 9] Block diagram [Fig. 10] Plan view of ground sensor [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Mowing part 16 Weeding frame 21 Grounding sensor 21a Grounding action part 21d of a grounding sensor Locking part 22 of a grounding sensor 22 Detection part 25 Support body 60 Energizing part 65 Engagement part N Reference | standard rotation position Y of a support body Rotation axis W1 Width of locking part W2 Width of grounding part

Claims (2)

A grounding sensor that can swing up and down with respect to the weeding frame and a detection unit that detects the ground height of the cutting unit based on the swing angle of the grounding sensor. A device,
A support body rotatably connected to the weed frame around a longitudinal axis of the machine body, and an urging means for urging the support body to a reference rotation position with respect to the weed frame. Prepared,
The grounding sensor is rotated with respect to the weed frame around the shaft core together with the support, and is supported up and down with respect to the support at the reference rotation position. Let the body support,
The detection unit is supported by the support so as to rotate with respect to the weed frame around the axis together with the support,
A locking portion is provided on the rear end side of the ground sensor opposite to the side connected to the support, and the engaging portion engages with the locking portion so that the ground sensor can be separated around the axis. An apparatus for detecting the height of a harvesting unit with respect to a harvesting machine, wherein the weeding frame includes an engaging part that restricts a lateral shift with respect to the weeding frame on the rear end side of the grounding sensor while allowing rotation with respect to the grass frame. 2. The harvesting unit height detection device for a harvesting machine according to claim 1, wherein a width of the engaging portion of the grounding sensor is smaller than a width of the grounding action portion.

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