JP2018186756A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester which includes a detection body provided vertically swingably at a lower part side of a reaping part liftably provided in a traveling machine body, and detecting a ground height of the reaping part, and can compactly arrange the detection body and a detection sensor.SOLUTION: A combine harvester includes: a reaping part 4 liftably connected to the front part of a traveling machine body 3; a detection body 30 vertically swingably supported on the lower end part of the reaping part 4 and made vertically swingable by grounding on the ground surface; a grounding part 39a grounding on the ground surface so as to make the detection body 30 vertically swingable; a detection sensor 31 fixed to a reaping part 4 side so as to detect the vertical swinging position of the detection body 30; and a bracket 23 supporting the detection body 30 and the detection sensor 31 on the lower part side of the reaping part 4. The detection body 30 is arranged at one of the right and left lateral face sides of the bracket 23, and the detection sensor 31 is arranged at the other of the right and left lateral face side of the bracket 23.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a combine provided with a ground height detection device in a pre-processing section that can be moved up and down.

  A cutting part connected to the front part of the traveling machine body so as to be able to move up and down, a detection body supported so as to be able to swing up and down at the lower end of the cutting part, and grounding so that the detection body can swing up and down A grounding portion and a detection sensor fixed to the reaping portion so as to detect the vertical swing position of the detection body, and the pre-processing portion of the preprocessing section is detected by the vertical swing position of the detection body detected by the detection sensor. A combine described in Patent Document 1 for detecting the height to ground is conventionally known.

Japanese Patent No. 5672293

  In the above-mentioned document, the detection body swings forward when the traveling machine body travels backward, and swings left and right when the traveling machine body turns and retreats, thereby loading the detection body. Although it can be prevented from being deformed or damaged, since the detection sensor is provided so as to rotate integrally with the detection body, the entire detection sensor close to the ground side is covered with a case body. In addition to the increase in size, the range in which the detection body and the detection sensor swing is also increased, which increases the installation space.

  The present invention relates to a combine including a detection body that is provided on a lower side of a cutting part that is provided on a traveling machine body so as to be movable up and down, and that detects a height of the cutting part with respect to the ground. It is an object to provide a combine that can be arranged compactly.

  In order to solve the above-mentioned problems, the present invention firstly includes a cutting part 4 connected to the front part of the traveling machine body 3 so as to be movable up and down, and is supported by the lower end part of the cutting part 4 so as to be vertically swingable. Detecting the detection body 30 that swings up and down by touching the ground, the grounding portion 39a that contacts the ground so that the detection body 30 swings up and down, and the vertical swing position of the detection body 30 are detected. As described above, the detection sensor 31 fixed to the cutting part 4 side and the bracket 23 for supporting the detection body 30 and the detection sensor 31 on the lower side of the cutting part 4 are provided. The detection body 30 is disposed on the left and right sides of the bracket 23, and the detection sensor 31 is disposed on the other side of the bracket 23.

  Secondly, the detection body 30 has a detection member 34 supported so as to be pivotable up and down, a linkage member 37 supported below the detection member 34 so as to be pivotable left and right, and the linkage member 37. A grounding member 39 that is supported so as to be retractable and pivotable forward and that protrudes downward is provided.

  Third, the grounding member 39 retracted and rotated between a left / right rotation shaft 36 that is a left / right rotation fulcrum of the linkage member 37 and a front / rear rotation shaft 38 that is a front rotation fulcrum of the grounding member 39. The grounding member 39 is configured to wrap with the linkage member 37 in a side view when the grounding member 39 is retracted and rotated by receiving an external force from behind.

  The detection body is arranged on one of the left and right side surfaces of the bracket provided at the lower end of the cutting portion, and the detection sensor is arranged on the other side surface of the bracket, thereby making the detection body and the detection sensor compact. Since the bracket also serves as the cover of the detection sensor, the number of parts can be reduced.

  Further, the detection body includes a detection member that is supported so as to be pivotable up and down, a linkage member that is pivotally supported below the detection member, and a retractable pivot that can be retracted forward with respect to the linkage member. With the grounding member that is supported and protrudes downward, the grounding member 39 that is a part of the detection body is retracted and rotated forward or left and right, so that the grounding member is grounded. In this state, even when the traveling machine body is moved backward or turned and receives an external force forward or left and right, the detection body can be retracted with the minimum necessary movement.

  Further, a retreat space in which the retreating grounding member is disposed between a left / right rotation shaft that is a left / right rotation fulcrum of the linkage member and a front / rear rotation shaft that is a front rotation fulcrum of the grounding member. When the grounding member is configured to wrap with the linking member in a side view when it is retracted and rotated by receiving an external force from behind, the installation space of the detection body can be made more compact. Can do.

It is the side view which showed the self-removing combine to which this invention is applied. It is the top view which showed the self-removing combine which applied this invention. (A) And (B) is the principal part front view and principal part left view which showed the ground height detection apparatus. It is the principal part right view which showed the ground height detection apparatus. It is the principal part perspective view which showed the ground height detection apparatus. (A) And (B) is the front view and left view which showed the ground height detection apparatus at the time of advance driving | running | working. (A) And (B) is the front view and left view which showed the ground height detection apparatus of the state by which the detection member was rock | fluctuated to the upper limit position at the time of advance driving | running | working. (A) And (B) is the front view and left view which showed the ground height detection apparatus at the time of reverse drive. (A) And (B) is the front view and left view which showed the ground height detection apparatus of the state by which the detection member was rock | fluctuated to the upper limit position at the time of reverse drive. (A) And (B) is the front view and left view which showed the ground height detection apparatus at the time of turning driving | running | working. (A) And (B) is the front view and left view which showed the ground height detection means of the state by which the detection member was rock | fluctuated to the upper limit position at the time of turning driving | running | working.

  1 and 2 are a side view and a plan view showing a self-removing combine to which the present invention is applied. This combine can be driven up and down to the front side of the traveling machine body 3, the traveling machine body 3 in which the body frame 2 is supported by a pair of left and right crawler type traveling devices 1, 1, a cabin 10 on which an operator gets in and steers. A connected pre-processing unit (reaping unit) 4 is provided.

  The pre-processing unit 4 is extended from the front side of the traveling machine body 3 toward the front lower side, and is provided on a support body 6 that is provided so as to be rotatable up and down with the rear end base end as a rotation fulcrum. The pretreatment unit 4 is lifted and lowered by extending and contracting a hydraulic cylinder for raising and lowering the pretreatment connected to the support 6 side and the traveling machine body 3 side.

  In addition, the pretreatment unit 4 divides the cereals on the field into the reaping side and the non-reaching side by using a plurality of dividers 7 arranged in the left-right direction below the front end (seven in the illustrated example). The culm is raised by the pulling device 8 and raked into the pretreatment unit 4 side, and a cutting operation for cutting the cereal with a cutting blade (not shown) arranged on the lower end side is performed. The cereals harvested by the pretreatment unit 4 are conveyed to the threshing device side 12 installed on the left part of the traveling machine 3 by the pretreatment conveyance device, and the feed chain provided on the left side surface of the threshing device 12 Passed to the 13th side.

  Incidentally, the pre-processing unit 4 is provided with a ground height detection device 14 for detecting the ground height between the lower surface side of the pre-processing unit 4 and the field on the lower side of the divider 7. Based on the ground height detected by the ground height detection device 14, the processing unit 4 is configured such that the ascending / descending position of the preprocessing unit 4 during the cutting operation is controlled to a height position suitable for the cutting operation. Has been.

  The ground height detection device 14 is provided in each of the dividers 7 and 7 adjacent to the inside of the dividers 7L and 7R at both the left and right ends in the illustrated example, but the ground height detection device 14 is provided for other dividers. The number of the ground height detection devices 14 to be installed may be one or three or more. Specific configurations of the divider 7 and the ground height detection device 14 will be described later.

  The cereal grains passed to the threshing device 12 side are sandwiched between the stock chain side by the feed chain 13 and the clamping rail 16 arranged directly above the feed chain 13, and the tip side is the handling cylinder of the threshing device 12 ( It is conveyed rearward in a state of being directed to the side (not shown). The handling cylinder is formed in a cylindrical shape extending in the front-rear direction, and is configured to be driven to rotate about an axis in the front-rear direction. The ear of the cereal is threshed and rejected. The processed product that has been threshed is dropped and supplied to a sorting chamber (not shown) that is disposed directly below the barrel.

  The processed material dropped and supplied to the sorting chamber is sorted into grains such as straw and waste such as sawdust by swing sorting and wind sorting. The discharged matter is discharged out of the machine from the rear end of the traveling machine body 3, while the grain is conveyed and accommodated in a Glen tank 17 located on the right side of the threshing device 12 in the traveling machine body 3.

  On the other hand, the waste is passed from the rear end side of the feed chain 13 to the waste transport body 18 arranged behind the feed chain 13 and is transported rearward toward the rear end side of the traveling machine body 3 and travels as it is. It is discharged from the rear end portion of the machine body 3 as it is, or after being cut and discharged outside the machine.

  The grain stored in the Glen tank 17 is supported by a base end on the right side of the rear end of the traveling machine body 3 and is machined through an auger 19 that pivots left and right and swings up and down around the base end in the vertical direction. It is discharged outside.

  Next, the configuration of the divider and the ground height detection device provided in the divider will be described with reference to FIGS. 3 (A) and 3 (B) are a front view and a left side view of the main part showing the ground height detection device, and FIG. 4 is a right side view of the main part showing the ground height detection device. FIG. 5 is a perspective view of a main part showing the ground height detection device.

  The divider 7 is bolted to a weeding frame 21 supported on the front side of the support 6 and extending to the front side of the pretreatment unit 4, and a mounting plate 22 on the front end side of the weeding frame 21. A plate-like support bracket 23, a weed plate 24 that is bolted to the support bracket 23 and protrudes forward, a guide body 26 provided on the upper surface side of the weed plate 24, and the weed plate 24, a pair of left and right guide rods 27 attached to the left and right sides of the grass 24, and a guide plate 28 provided on the left and right sides of the weed plate 24, and the ground height detecting device 14 on the support bracket 23 side. Is attached (see FIG. 3B).

  The mounting plate 22 has a pair of upper and lower elongated mounting holes 22a and 22a inclined downward toward the front (see FIG. 3B), and the support bracket 23 is interposed through the mounting holes 22a. Is bolted. Thereby, the attachment position of the divider 7 can be adjusted in the front-rear direction or the up-down direction within the range on the attachment hole 22a according to the type of crop to be cut and the condition of the farm field.

  The guide body 26 is formed with a concave portion 26a into which the upper end of the weed plate 24 is fitted on the front end side, and extends so as to incline toward the rear upper side from the concave portion 26a in a side view. It forms so that it may become wide toward the left-right outer side toward the back from the recessed part 26a. Thereby, the guide body 26 can cover the upper surface side from the left and right side surfaces of the weed board 24.

  The guide rod 27 is a rod-like member in the front-rear direction whose front end side is fixed to the left and right side surfaces of the weed plate 24 and is inclined rearward toward the left and right outer sides of the weed plate 24, It is provided on each of the left and right sides of the weed plate 24. In addition, the guide rod 27 is formed to bend from the right side to the left and right outside from the lower side of the concave portion 26 a of the guide body 26 in a side view, and to be inclined toward the rear upper side similarly to the guide body 26.

  The guide plate 28 is a member that is attached to the left and right side surfaces of the weed plate 24 and is formed in a right triangle shape that is inclined to the left and right sides toward the rear. In addition, it is disposed on the front side of the ground height detection device 14 and is provided so as to be substantially horizontal with respect to the farm scene side.

  According to this configuration, the divider 7 divides the cereals in the field into the left and right sides of the weed board 24, and the cereals weed by the weed board 24 approach the cutting blade side. The stocker side is gradually curved toward the left and right outer sides of the weed plate 24 by the guide body 26 and the guide rod 27, and the grain culm is guided to the pulling device 8 side disposed between the adjacent dividers 7 and 7. be able to.

  Further, as shown in the figure, the ground height detection device 14 is disposed in a space formed below the guide body 26 in a side view and between a pair of left and right guide rods 27, 27 in a front view. Has been. That is, since the pestle scraped by the forward traveling in the field is guided by the guide rod 27 and the guide body 26 so as to be divided to the left and right outside on the front side of the ground height detecting device 14, the ground height is increased. It is possible to prevent a failure or the like due to the cereals coming into contact with the detection device 14 (see FIGS. 3 to 5).

  Furthermore, the above-mentioned divider 7 breaks through the guide plate 28 the mud in the field on the front side of the ground height detection device 14 when we work on the field, the weeds not guided by the guide rod 27, etc. Since it can be divided, it is possible to efficiently prevent mud from adhering to the ground height detection device 14 side and entanglement of weeds. The guide plate 28 can also function as a settlement regulating plate that prevents the divider 7 from sinking into the field when the field is muddy.

  The ground height detection device 14 includes the support bracket 23, a detection body 30 supported by the support bracket 23 so as to be able to swing up and down, and a potentiometer (detection sensor) for detecting the vertical swing position of the detection body 30. 31 and a control unit, and the control unit detects the height of the pre-processing unit 4 with respect to the ground by detecting the vertical swing position of the detection body 30 that swings up and down while being grounded to the field side by the potentiometer 31. Is configured to do.

  The detection body 30 includes a detection member 34 supported on the left and right (left in the illustrated example) side of the support bracket 23 via a first fulcrum shaft 33 so as to be able to swing up and down. A boss member 35 that is attached and fixed to the lower end side and extends in the front-rear direction, a second fulcrum shaft (left-right rotation shaft) 36 that is inserted through the boss member 35, and the second fulcrum shaft 36 as an axis. A link member 37 configured to rotate, and a grounding member 39 disposed on the rear end side of the link member 37 and provided so as to swing back and forth about a third fulcrum shaft (front / rear rotation shaft) 38 The detecting body 30 is configured to detect the ground height by grounding the lower side of the grounding member 39 to the farm scene side when the traveling machine body 3 travels forward, and when the traveling machine body 3 travels backward or turns left and right. Sometimes it is possible to switch to the retracted posture in which the grounding member 39 is retracted upward. It is configured.

  The grounding member 39 is a plate-like member extending downward from the rear end side of the linking member 37, and a lower end side of the grounding member 39 contacts the field side, and an upper end side of the grounding portion 39a. Is supported by the third fulcrum shaft 38 so as to be able to swing back and forth (up and down), and a biasing member that is inserted through the third fulcrum shaft 38 and urges the grounding portion 39a to swing backward. The grounding portion 39a urged toward the backward swinging side by the base end portion 39b coming into contact with a regulating portion 37a formed on the rear end side of the linkage member 37 is provided. It is comprised so that it may hold | maintain in the detection position which inclined back backwards in the side view (refer FIG.3 (B) etc.).

  As a result, the grounding member 39 is held at the detection position by the urging force of the torsion spring 41. On the other hand, when a force that swings forward acts on the grounding member 39, the grounding member 39 is moved to the torsion spring. It is configured to swing forward (upward) against the urging force of 41 (hereinafter referred to as retraction operation). Specific operation will be described later.

  The linking member 37 is a plate-like member extending in the front-rear direction, and the connecting portion 37b to which the second fulcrum shaft is connected by bending the front and rear ends so as to be U-shaped as a whole. And the restricting portion 37a on the rear end side of the linking member 37 is formed.

  The connecting portion 37b is connected to the second fulcrum shaft 36 and is provided with a projecting pin 42 extending forward. In addition, the connecting portion 37b is inserted into the boss member 35 on the lower end side of the detection member 34 and the boss member 35 (detection member 34) side by preventing the connection portion 37b from coming off with a retaining pin. It is supported so that the shaft can rotate. Further, a cylindrical portion of the torsion spring 43 is externally provided on the boss member 35 side, and a pair of arm portions protruding from the torsion spring 43 are disposed so as to sandwich the protruding pin 42.

  Thus, the link member 37 is held at a position where the shaft rotation position becomes a detection position where the grounding member 39 is straightly extended toward the field in front view by the biasing force of the torsion spring 43. As a result, when a force in a direction that swings left and right acts on the grounding member 39, the link member 37 is rotated about the axis of the second fulcrum shaft against the urging force of the torsion spring 43. The ground member 39 is configured to swing (retract) from the left and right (upward). Specific operation will be described later.

  The detection member 34 is formed in a square shape extending from the first fulcrum shaft 33 to the front lower side and the rear upper side, to which the first fulcrum shaft 33 is fixed. Further, the detection member 34 is prevented by a retaining pin in a state where the first fulcrum shaft 33 is rotatably inserted into a boss portion 23a formed on the support bracket 23 side (see FIG. 4). Thus, the detection member 34 is supported on the support bracket 23 side so as to swing up and down about the first fulcrum shaft 33.

  The detection member 34 is provided with a lower limit restricting pin 46 on the lower side of the first fulcrum shaft 33, and the lower limit restricting pin 46 comes into contact with the lower surface side of the support bracket 23 to be below the detection member 34 ( It is configured such that the forward swing is restricted at the lower limit position. On the other hand, an upper limit regulating pin 47 protruding from the support bracket 23 to the detection member 34 side is provided above the first fulcrum shaft 33, and the upper limit regulation pin 47 is connected to the upper side of the detection member 34. By contacting, the upper (rear) swing of the detection member 34 is restricted at the upper limit position (see FIGS. 3B and 4).

  A cylindrical portion of a torsion spring 48 is inserted through the first fulcrum shaft 33, and one side of the pair of arm portions protruding from the torsion spring 48 is on the lower limit regulating pin 46 side on the detection member 34 side. The other side of the arm portion is locked to the upper limit regulating pin 47 side on the support bracket 34 side.

  Thereby, the detection member 34 detects the upward swing amount from the initial state by the potentiometer 31 with the state where the lower limit regulating pin 46 is urged at the lower limit position in contact with the support bracket 23 side as an initial state. By this, it is comprised so that the ground height of the pre-processing part 4 may be detected (refer FIG. 4). Specific operation will be described later.

  According to the above-described configuration, when the traveling body 3 travels forward and the grounding member 39 is pressed in contact with the ground, and the force is applied to the grounding member 39 from the front, the detection body 30 is moved by the restricting portion 37a. In a state where the rearward rotation of the grounding member 39 (relative rotation with respect to the linkage member 37) is restricted, the entire detection body 30 (detection member 34) moves the first fulcrum shaft 33 against the urging force of the torsion spring 48. It pivots upward on the shaft (see FIG. 6).

  In addition, when the traveling body 3 travels backward and the grounding member 39 is pressed in contact with the ground or a stub or the like and a force is applied to the grounding member 39 from the rear, the detecting body 30 A retraction operation of rotating forward (relative rotation with respect to the linkage member 37) about the third fulcrum shaft 38 is performed against the urging force of the spring 41. Thereby, it is possible to prevent the grounding member 39 and the like from being damaged. At this time, since the torsion spring 48 on the first fulcrum shaft 33 side has a larger urging force than the torsion spring 41 on the third fulcrum shaft side, the detection member 34 is swung up and down. In addition, the grounding member 39 is configured to be retracted first.

  In addition, when the traveling body 3 turns and the grounding member 39 is pressed in contact with the ground or a stub or the like and the force is applied to the grounding member 39 from the lateral direction, A retraction operation is performed in which the two fulcrum shafts 36 are pivoted left and right (relatively pivoted left and right relative to the detection member 34). Thereby, it is possible to prevent the grounding member 39 and the like from being damaged.

  As described above, the first fulcrum shaft 33 is a fulcrum shaft that is the swinging shaft of the detection member 34 and the ground height of the preprocessing unit 4 is related to the detection, and the second fulcrum shaft 36 and the third fulcrum shaft. Reference numeral 38 denotes a fulcrum shaft related to the retracting operation of the grounding member 39.

  When the detection body 30 is switched from the detection posture to the retracted posture, only the grounding member 39 that is a part of the detection body 30 is retracted back and forth and left and right, so that the ground height detection device 14 is grounded. Therefore, the space secured under the divider 7 can be further reduced.

  The potentiometer 31 is attached and fixed to the left and right (right in the illustrated example) side surface of the support bracket 23 so as to detect the vertical swing of the rear side of the detection member 34. That is, the potentiometer 31 does not move even when the detection body 30 (the detection member 34, the linking member 37, and the grounding member 39) is swung. Therefore, the wiring connected to the potentiometer 31 is routed. It becomes easy to do.

  The potentiometer 31 and the detection body 30 (detection member 34) are arranged so as to sandwich the support bracket 23 on the left and right sides, and the detection arm of the potentiometer 31 is inserted through a hole formed on the support bracket 23 side. Therefore, the ground height detecting device 14 as a whole can be made more compact. Furthermore, since the support bracket 23 functions as a cover body of the potentiometer 31 by arranging the support bracket 23 between the potentiometer 31 and the detection body 30 that swings back and forth or right and left, the number of parts Has also been reduced.

  As described above, the ground height detection device 14 can detect the ground height of the preprocessing unit 4 by detecting the upward swing position of the detection member 34 with the potentiometer 31. Further, even if the grounding member 39 is in contact with the ground, a stump, or the like by the traveling machine body 3 traveling backward or turning with the pre-processing unit 4 lowered, Due to the retracting operation of the grounding member 39 and the ascent control of the preprocessing unit 4 based on the detection of the height to the ground by the detection member 34, it is possible to efficiently prevent a situation of breakage or failure. Hereinafter, a more specific operation of the ground height detection device 14 will be described.

  Next, based on FIG.6 and FIG.7, the operation | movement aspect of the said ground height detection apparatus at the time of advance driving | running | working is demonstrated. 6A and 6B are a front view and a left side view showing the ground height detection device during forward travel, and FIGS. 7A and 7B show the upper limit of the detection member during forward travel. It is the front view and left view which showed the ground height detection apparatus of the state rock | fluctuated to the position.

  As shown in FIG. 6, when the traveling machine body 3 travels forward with the grounding portion 39 a in contact with the ground, the detection body 30 (the detection member 34) is preprocessed. Depending on the height of the part 4 to the ground, it swings up and down between the lower limit position and the upper limit position. At this time, the ground height of the preprocessing unit 4 can be detected by detecting the vertical swing position of the detection member 34 with the potentiometer 31.

  In addition, when the detection member 34 is swung upward to the upper limit position, the detection body 30 is configured such that the grounding portion 39a of the grounding member 39 which is the lower end side of the detection body 30 is the lower end side of the divider, specifically, It is comprised so that it may be located above the lower end side of the weed board 24 (refer FIG. 7 (A) and (B)). Thereby, even if it is a case where the pre-processing part 4 is lowered | hung down to the position where the lower end side of a divider contacts the agricultural field side completely, it is comprised so that the said detection body 30 may not be damaged.

  Next, based on FIG.8 and FIG.9, the operation | movement aspect of the said ground height detection apparatus at the time of reverse drive is demonstrated. FIGS. 8A and 8B are a front view and a left side view showing the ground height detection device during reverse travel, and FIGS. 9A and 9B show the upper limit of the detection member during reverse travel. It is the front view and left view which showed the ground height detection apparatus of the state rock | fluctuated to the position.

  As shown in FIG. 8, when the traveling machine body 3 travels backward while the ground contact portion 39 a is in contact with the field scene side, the detection body 30 is in the retracted posture. Specifically, the grounding member 39 is switched to a state (reverse retracted posture) in which the grounding member 39 is retracted from the detection position toward the upper front side.

  As a result, when the traveling body 3 moves backward, the detection body 30 is switched to the retracted posture, so that the grounding member 39 is in front of the grounding portion 39a that contacts the ground with respect to the third fulcrum shaft 38. As a result, it is possible to reliably prevent the ground contact member 39 from being caught on the field side by reverse travel and being deformed or damaged.

  In addition, when the grounding member 39 is swung upward to the upper limit position, the grounding member 39a of the grounding member 39, which is the lower end side of the sensing body 30, is moved to the lower end side of the divider. It is comprised so that it may be located above the lower end side of the weed board 24 (refer FIG. 9 (A) and (B)). Thereby, even if it is a case where the pre-processing part 4 is lowered | hung down to the position which the lower end side of a divider contacts the field side completely at the time of reverse drive, the said detection body 30 is comprised so that it may not be damaged.

  Further, according to the above configuration, the space formed between the second fulcrum shaft 36 and the third fulcrum shaft 38 can be used as a retreat space for the grounding member 39 that is retreated. In other words, the ground contact member 39 is configured to wrap in a side view with the linkage member 37 extending in the front-rear direction when the grounding member 39 is retracted to the upper front side as the traveling body 3 travels backward. Therefore, the entire detection body 30 that is retracted can be configured more compactly (see FIGS. 8 and 9).

  Next, based on FIG.10 and FIG.11, the operation | movement aspect of the said ground height detection apparatus at the time of turning driving | running | working is demonstrated. 10 (A) and 10 (B) are a front view and a left side view showing the ground height detection device during turning, and FIGS. 11 (A) and 11 (B) show the upper limit of the detection member during turning. It is the front view and left view which showed the ground height detection means of the state rock | fluctuated to the position.

  As shown in FIG. 10, when the traveling machine body 3 is turned left and right with the ground contact portion 39 a in contact with the field scene side, the detection body 30 is retracted. Posture, specifically, the retracting posture (turning retracting posture) in which the grounding member 39 is retracted toward the upper left and right sides by rotating the linkage member 37 about the second fulcrum shaft 36 from the detection position. Is switched to.

  More specifically, in the detection body 30, when the traveling machine body 3 is rotated to the right, the grounding member 39 is retracted to the upper left side about the second fulcrum shaft 36 (see FIG. 10). When the airframe 3 is turned left, the ground contact member 39 retreats to the upper right side about the second fulcrum shaft 36 (not shown). Thereby, when the traveling machine body 3 is turned, the detection body 30 is switched to the retracted posture, so that it is possible to reliably prevent the grounding member 39 from being caught by the field and being damaged.

  In addition, when the detection member 34 is swung upward to the upper limit position while the detection body 30 is in the retracted position, the grounding portion 39a of the grounding member 39 which is the lower end side of the detection body 30 is the lower end side of the divider. Specifically, it is comprised so that it may be located above the lower end side of the weed board 24 (refer FIG. 11 (A) and (B)). Thereby, even if it is a case where the pre-processing part 4 is lowered | hung to the position which the lower end side of a divider contacts the agricultural field side completely at the time of turning driving | running | working, it is comprised so that the said detection body 30 may not be damaged.

3 traveling machine body 4 pre-processing part (reaping part)
23 Support bracket (bracket)
30 detection body 31 detection sensor 34 detection member 36 2nd fulcrum axis (left-right rotation axis)
37 Linking member 38 Third fulcrum shaft (front / rear rotation shaft)
39 Grounding member

Claims (3)

A cutting part (4) connected to the front part of the traveling machine body (3) so as to be movable up and down;
A detection body (30) supported by the lower end of the cutting part (4) so as to be able to swing up and down and swinging up and down by touching the ground;
A detection sensor (31) fixed to the mowing part (4) so as to detect the vertical swing position of the detection body (30);
A bracket (23) for supporting the detection body (30) and the detection sensor (31) on the lower side of the cutting part (4);
The combine in which the detection body (30) is disposed on one of the left and right side surfaces of the bracket (23), and the detection sensor (31) is disposed on the other side surface of the bracket (23). The detector (30) is
A detection member (34) supported so as to be rotatable up and down;
A linkage member (37) supported at the lower part of the detection member (34) so as to be rotatable left and right;
The combine according to claim 1, further comprising a grounding member (39) which is supported so as to be able to retract and rotate forward with respect to the linkage member (37) and protrudes downward. Retraction rotation between a left / right rotation shaft (36) that is a left / right rotation fulcrum of the linkage member (37) and a front / rear rotation shaft (38) that is a front rotation fulcrum of the grounding member (39). Providing a retreat space in which the grounding member (39) is disposed,
The combine according to claim 2, wherein the grounding member (39) is configured to wrap with the linkage member (37) in a side view when the grounding member (39) is retracted and rotated by receiving an external force from behind.

Images