JP2007117016A - Structure for lifting and lowering reaping part of combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the sinking of a ground contact body and to avoid the thrusting of the tip of a reaping part into the ground surface without especially increasing the transverse width or length of the ground contact body in a structure for lifting and lowering the reaping part of a combine harvester composed so that the reaping part vertically shakably installed at the front of a traveling machine body is lifted and lowered following to the ground contact. <P>SOLUTION: The reaping part is composed so as to be elastically received and supported through an elastic urging mechanism and the ground contact body 46 long in the front and rear of the reaping part is installed in the lower end of the reaping part. The ground contact body 46 is arranged along the lower side of a grass diving frame 47 in the reaping part. A rear lowering slope is provided in a ground contact surface F of the ground contact body 46 so that the rear of the ground contact body 46 contacts the ground in advance of the front end thereof according to the lowering of the reaping part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a harvesting unit lifting structure for a combine that is configured to raise and lower a cutting unit disposed on the front of a machine body while following the ground.

For example, as disclosed in Patent Document 1, the support rod is extended and retracted between the cutting portion and the front end portion of the traveling machine body as a structure for raising and lowering the cutting portion of the combine configured to move the cutting portion up and down while following the ground. It can be installed freely, and the weight load of the cutting part is borne by the balance coil spring fitted on the support rod to reduce the ground load on the cutting part, and along the lower part of the weeding frame in the cutting part A configuration is proposed in which a grounding support is provided via a grounding body deployed in the same manner.
JP 2004-267123 A

  In the conventional structure disclosed in Patent Document 1, since the entire grounding body arranged at the lower part of the weeding frame behind the weeding tool at the tip of the cutting part is configured to be grounded in parallel with the ground, If there is a soft spot, the grounding body tends to sink, and the weeding tool at the tip of the cutting part may pierce the field.

  Of course, it is possible to reduce the settlement of the grounding body by increasing the width and length of the grounding body as much as possible to increase the grounding area. The lateral width and length of the grounding body cannot be arbitrarily increased due to dimensional constraints such as, and there is room for improvement.

  The present invention has been made paying attention to such points, and suppresses the settlement of the grounding body without particularly increasing the width and length of the grounding body, and the cutting portion tip is stuck into the ground. The main purpose is to be able to avoid it.

A first invention is a harvesting part lifting structure of a combine configured to raise and lower a cutting part arranged to be swingable up and down at the front part of a traveling machine body.
The cutting part is configured to elastically receive and support the elastic biasing mechanism, and includes a long grounding body in the front and rear at the lower end part of the cutting part,
The grounding body is arranged along the lower part of the weeding frame in the cutting part, and the grounding surface of the grounding body is grounded so that the rear part of the grounding body comes in contact with the front end part as the cutting part descends. Is provided with a rearwardly inclined surface.

  According to the above configuration, since the grounding surface of the grounding body is a downwardly inclined surface, even if the cutting part is lowered in the forwardly lowered posture and grounded, the entire grounding surface is grounded to ensure the weight of the cutting part. Subsidence is suppressed in support. In addition, when the vehicle travels forward, buoyancy due to the upward component of the ground reaction force acting on the ground surface inclined downwardly acts, and the settlement of the grounding body is further suppressed.

  Therefore, according to the first aspect of the present invention, it is possible to prevent the cutting portion from being stuck into the ground by suppressing the settlement of the grounding body without particularly increasing the lateral width and length of the grounding body.

According to a second invention, in the first invention,
A support rod provided with a weeding tool is inserted and fixed to the front end of the weed frame arranged in a cantilever direction facing forward, and the grounding body is connected to the support rod and the rear portion of the grounding body is divided into the weeds. The frame is configured to contact and support from below.

  According to the said structure, the front end of a grounding body can be arrange | positioned ahead from the front end of a weeding frame, and it can be brought close to a weeding tool, and it becomes effective in the prevention of rushing to the ground of the weeding tool front-end | tip.

  When the grounding body is deformed or damaged, the grounding body can be removed from the weeding frame together with the support rod, and repaired or exchanged.

  Although the grounding body is equipped on the support rod of the weeding tool, a part of the grounding load can be directly supported by the weeding frame at the rear of the grounding body in the mounted state, and the support strength is also sufficient. Can be secured.

According to a third invention, in the second invention,
A connecting flange joined to a support flange fixed to the front end of the weed frame and bolted and connected is provided in the front and rear middle of the support rod, and the front and rear intermediate parts of the grounding body are connected to the connection flange. There is something.

  According to the above configuration, the connecting flange that connects the support rod to the weed frame also functions as a member that connects the front and rear intermediate portions of the grounding body to the support rod widely in the lateral direction, which is effective in increasing the rigidity of the grounding body.

  1 and 2 show a self-decomposing combine. This combine is connected to a front part of a traveling machine body 2 provided with a pair of left and right crawler traveling devices 1 and a cutting part 3 having a two-row cutting specification is connected to the traveling machine body 2 so as to be movable up and down and slidable laterally. The threshing device 5 and the grain collection tank 6 with an unloader are mounted.

  The mowing unit 3 is a pair of left and right pulling devices 7 that raises the planted cereal to a predetermined mowing posture, a clipper-type mowing device 8 that cuts the raised planted culm, and the mowing cereal is scraped backward. It comprises a pair of left and right auxiliary conveyor belts 9, a pair of left and right rotating packers 10 that stirs and joins the stock of the harvested cereal grains, a feeding and conveying device 11 that conveys the harvested grain grains upward and rearward, and the like. The entire cutting part 3 is supported so as to be swingable up and down around a lateral fulcrum P at the rear base end, and is also driven up and down by a hydraulic cylinder 12.

  The supply and transport device 11 includes a stock holding and transporting mechanism 13 and a tip locking and transporting mechanism 14, and the whole supply and transport device 11 is adjusted to swing up and down around the lateral fulcrum P, thereby cutting the harvested grain. A handling depth adjustment function is provided in which the holding position for the cocoon is changed up and down to change and adjust the cereal delivery position to the feed chain 15 provided on the lateral outside of the threshing device 4 in the cocoon length direction. The feed conveying device 11 is driven to swing up and down by a drive mechanism (not shown) based on the detection of the culm length of the harvested culm, and the automatic handling depth that maintains the culm length inserted into the threshing device 5 regardless of the culm length. Control is to be performed.

  The mowing unit 3 is provided with a mowing unit frame 17 made of a square pipe material that supports the pulling device 7, the mowing device 8, the auxiliary transport belt 9, the rotary packer 10, and the like in a forward downward inclined posture. A rear end base portion of the part frame 17 is connected and supported on an upper portion of a base 18 provided at a front end portion of the traveling machine body 2 so as to be able to swing up and down around the lateral fulcrum P. The hydraulic cylinder 12 is a single-acting cylinder, and the cutting portion 3 is driven up by its extension operation, and the cutting portion 3 is lowered by its free shortening operation.

  As shown in FIGS. 5 and 6, the base portion of the cutting portion frame 17 is provided with a laterally proximal boss portion 17a configured in a cylindrical shape concentric with the laterally fulcrum P, and the laterally proximal boss portion 17a. A counter shaft 19 penetrating left and right is rotatably supported via a pair of left and right bearing brackets 21 and 22 disposed on the upper portion of the base 18. In the following description, the designation in the left-right direction indicates the direction with respect to the aircraft, and in the front views of FIGS.

  An input pulley 23 is attached to the right end of the counter shaft 19, and a PTO shaft (not shown) provided in the traveling mission case 24 and the counter shaft 19 are belt tension type cutting clutches (not shown). ) Through the belt. Further, a transmission case 25 made of a round pipe material extends from the base end boss portion 17a toward the front upper side, and the transmission shaft 26 and the counter shaft 19 inserted through the transmission case 25 are located in the base end boss portion 17a. Thus, the bevel gear is interlocked and driven by the power transmitted from the counter shaft 19 to the transmission shaft 26, so that the device 7, the mowing device 8, the auxiliary transport belt 9, and the rotary packer 10 are driven.

  As shown in FIG. 4, the countershaft 19 that protrudes to the left outward from the left bearing bracket 21 is equipped with a bevel gear case 27 that is rotatable around the countershaft axis, that is, around the lateral fulcrum P. In addition, a transmission shaft 28 interlocked with the counter shaft 19 with the bevel gear extends obliquely upward from the bevel gear case 27, and the stock holding and transporting mechanism 13 of the supply / conveyance device 11 with the power extracted from the transmission shaft 28 and The tip locking conveyance mechanism 14 is driven.

  The PTO shaft (not shown) that transmits the power for driving the cutting unit to the counter shaft 19 is driven at a speed synchronized with the forward traveling speed, whereby each mechanism of the cutting unit 3 is synchronized with the traveling speed. Driven at speed.

  The cutting part 3 configured as described above is supported so as to be able to slide and move in a swingable manner, and the structure thereof will be described below in detail with reference to FIGS.

  A swivel bracket 31 capable of swiveling around a vertical fulcrum X is provided at the left side portion of the base 18 and a swivel arm 32 extends from the swivel bracket 31 toward the right (inside the aircraft). Yes. The bearing brackets 21 and 22 are connected and fixed to the turning base end side and the free end side of the upper surface of the turning arm 32, respectively, and the right side of the turning arm 32 itself is the upper surface of the base 18 erected on the main frame 16. Are connected by a pair of front and rear bolts 33.

  The swivel arm 32 is equipped with a cutting portion lateral movement mechanism 34. The mowing section lateral movement mechanism 34 includes a rectangular loop-shaped swing support frame 35 supported by the swing arm 32 so as to be swingable about a lateral fulcrum Q, and a horizontal movement between the left and right arms of the swing support frame 35. There are provided a screw shaft 36 that is mounted on and supported, a movable piece 37 that is screwed onto the screw shaft 36, an electric motor 38 that drives the screw shaft mounted on the swing support frame 35, and the like. The connecting piece 35b provided on the lower end lateral flange portion 35a of the frame 35 and the plunger 12a of the hydraulic cylinder 12 are connected by a connecting pin 39 that can be inserted and removed. As shown in FIG. 14, the connecting pin 39 is provided with a connecting plate 39a and a handle 39b. Usually, the connecting plate 39a is fastened to the connecting piece 35b by a bolt 40 and connected to the plunger 12a. Is maintained, and the connection between the cutting portion lateral movement mechanism 34 and the plunger 12a is released by removing the bolt 40 and extracting the connection pin 39.

  The laterally proximal boss part 17a of the cutting part frame 17 is supported so as to be slidable to the left and right along the counter shaft 19 between the left and right bearing brackets 21 and 22, and can swing by its own weight around the lateral fulcrum P. The mowing unit frame 17 is received and supported by the lower end horizontal portion 35a of the swing support frame 35, and the swing support frame 35 is swung around the lateral fulcrum Q by the hydraulic cylinder 12, thereby supporting the swing. The cutting part 3 received and supported by the frame 35 is swung up and down around the lateral fulcrum P. The cutting part frame 17 is engaged from above without applying a load to the movable piece 37 above the cutting part frame receiving position by the swing support frame 35, and the screw shaft 36 is rotationally driven by the electric motor 38. When the movable piece 37 is screwed and moved to the left and right, the entire cutting part 3 is slid horizontally by a fixed stroke. In addition, a regulating rod 41 that crosses the upper surface proximity position of the cutting part frame 17 is fixed to the swinging support frame 35 so that the cutting part frame 17 is lifted from the lower end horizontal part 35a of the swinging support frame 35 and is movable. Disengagement from the piece 37 is prevented.

  The slidably movable cutting part 3 is basically used by moving to either one of the left and right stroke ends, and the reaping part 3 is moved to the left stroke at the time of the rotary cutting operation which is a normal cutting form. By sliding to the end (see FIG. 6), the left end of the cutting unit 3 is projected to the left from the tread of the left crawler traveling device 1. Further, at the time of mid-split work for cutting and harvesting by cutting through the center of the field, the cutting unit 3 is slid to the right stroke end (see FIG. 5) and positioned within the body width. The mowing unit 3 is also slid to the right stroke end during non-work such as traveling outside the field, moving on a truck bed, or storing in a garage.

  As shown in FIG. 4, the front end portion of the feeding / conveying device 11 provided in the mowing unit 3 can be slid up and down on a guide rod 42 that is formed in an arc shape with the lateral fulcrum P as the center and fixed upright. The feed and transport device 11 is configured to be swingable up and down so that the handling depth can be adjusted, and when the cutting unit 3 is slid laterally, the feed and transport device 11 is moved to the base transmission shaft. 28 is relatively laterally swung around the shaft center b. That is, when the cutting unit 3 is slid laterally, the front end portion of the supply / conveyance device 11 whose front end portion is engaged and supported by the guide rod 42 is always pulled up and moved so as to be in the rear position of the device 7. The rear end portion of the supply / conveyance device 11 is located in the vicinity of the start end of the feed chain 15, thereby causing the cereal to pass from the device 7 to the start end portion of the supply / conveyance device 11 regardless of the slide lateral movement position of the cutting unit 3. In addition, the cereal delivery from the terminal end of the supply / conveyance device 11 to the start end of the feed chain 15 is performed smoothly.

  On the left outer side of the reaping part 3, a cereal supply table 45 for temporarily placing cereals that have been hand-cut in the pillow threshing operation is provided. The corn supply table 45 is supported so as to be laterally movable, and detailed description of the structure is omitted, but the cereal supply table 45 with respect to the starting end of the feed chain 15 regardless of the sliding horizontal movement of the cutting unit 3. Is always held at a constant position in the lateral direction.

  In this combine, the following structure is provided in order to avoid that the front-end | tip part of the cutting part 3 rushes into a farm field in normal cutting harvesting work.

  That is, as shown in FIG. 9, when the cutting part 3 is lowered by its own weight to the cutting work height region, the lower end reed part 35 a of the swing support frame 35 in the cutting part lateral movement mechanism 34 is The elastic biasing mechanism 50 attached to the front end is elastically contacted and supported.

  As shown in FIG. 11, the elastic urging mechanism 50 includes a pair of front and rear spring receiving members 51, 52 opposed to each other so that the interval can be changed, and a coil spring that is initially compressed and sandwiched between the spring receiving members 51, 52. 53 and a support rod 54 inserted through and attached to the center of both spring receiving members 51 and 52 so as to prevent the gap between the spring receiving members 51 and 52 from being enlarged. The support rod 54 is made of a bolt material, and the initial compression state of the clamped coil bar 53 is adjusted by adjusting the maximum distance between the spring receiving portions 51 and 52 by adjusting the screwing of the support rod 54. It is possible. Each spring receiving member 51, 52 is press-formed in a cup shape for positioning and fitting the coil spring 53, and a pair of support protrusions 51a, 52a are bent and extended at diagonal positions on the outer peripheral portions thereof. Attachment holes 55 and 56 are formed in 51a and 52a.

  On the other hand, two support rods 57 for mounting the elastic urging mechanism 50 are fixed to the front part of the body frame 16 in the traveling body 2 through a bracket 58 in a cantilever direction facing forward. The support rods 57 are arranged at intervals corresponding to the pitch of the mounting holes 55 and 56, and support the unit-like elastic biasing mechanism 50 via the mounting holes 55 and 56 in the front and rear support protrusions 51a and 52a. The elastic urging mechanism 50 is supported on the front portion of the traveling machine body 2 in a cantilever shape that rises forward in front of the heel by being inserted into the rod 57 from the front.

  The front surface of the front spring receiving member 51 functions as a receiving portion s that contacts and supports the lower end lateral flange portion 35 a of the swing support frame 35 provided in the cutting portion 3. A rubber mudguard cover 61 is wound around the coil spring 53 in the elastic urging mechanism 50 to prevent foreign substances such as mud from adhering to and entering the elastic urging mechanism 50.

  The initial compressive load of the elastic urging mechanism 50 is adjusted by the operation of the support rod 54 so as to be a value slightly smaller than the weight of the reaping portion 3, and the reaping portion 3 compresses and deforms the elastic urging mechanism 50. However, it is possible to descend to the lowering limit determined by the shortest length of the hydraulic cylinder 12. A hook-shaped grounding body 46 is provided at the lower end of the cutting unit 3, and the cutting unit 3 that is lowered by its own weight while compressing and deforming the elastic biasing mechanism 50 is grounded and supported via the grounding unit 46.

  The grounding body 46 is attached to the weeding frame 47 at the left and right ends of the three weeding frames 47 arranged in a cantilever direction at the lower end of the cutting unit 3 as follows.

  Each weeding frame 47 is made of a round pipe material, and a support rod 49 having a weeding tool 48 attached to the front end so that the posture can be changed is inserted and connected to the front end of the weeding frame 47 so that it can be inserted and removed. A support flange 47 a is provided at the front end of the weed frame 47, and a connection flange 49 a is provided in the front and rear middle of the support rod 49, and the connection flange 49 a of the support rod 49 inserted into the weed frame 47 is used as a support flange. The weeding tool 48 can be fixed at a predetermined posture position by contacting and supporting the front surface of 47a and bolting and connecting.

  The grounding body 46 is formed by pressing a steel plate back and forth into a long and narrow boat shape, and the grounding body 46 at the right end, which becomes the already trimmed side at the time of turning, is wide and has a plane shape that is asymmetrical to the left and right. On the other hand, the left grounding body 46 is configured to have a narrow width and a symmetrical plane shape.

  The front end portion of the grounding body 46 curved in a tapered shape is welded and fixed to the support rod 49, and the front and rear intermediate portions of the grounding body 46 are welded and fixed to the connecting flange 49a. It can be removed from the frame 47. The rear end portion of the grounding body 46 is also formed in a tapered shape so that the rear end of the grounding body 46 is engaged and supported by the weeding frame 47 from below when attached to the weeding frame 47. It has become. A contact rib 46a is welded and fixed to the upper surface of the rear portion of the grounding body 46 and is supported by contact with the lower surface of the weed frame 45, and the grounding surface F of the grounding body 46 is configured to be inclined downward. .

  In this way, the cutting unit 3 is lowered by its own weight and lightly supported by the grounding body 46 to perform grounding, so that even if a part of the field is raised or the traveling machine body 2 is tilted forward and inclined. Thus, it is avoided that the mowing unit 3 rises lightly and enters the field. In addition, since the ground contact surface F of the grounding body 46 is inclined downward, the rear part of the grounding body 46 is grounded prior to the front end as the mowing unit 3 is lowered. In addition to avoiding entry into the field, buoyancy due to the upward component of the ground reaction force acting on the ground contact surface F that is tilted downward when the vehicle travels forward acts and the settlement of the grounding body 46 is suppressed.

  As shown in FIG. 13, the shim plate 60 having an arbitrary thickness is interposed between the elastic urging mechanism 50 and the bracket 58 to change and adjust the position of the receiving portion s in the elastic urging mechanism 50 back and forth. be able to. By this shim adjustment, it is possible to set and adjust the ground pressure of the grounding body 46 by changing the amount of compressive deformation of the coil spring 53 in a state where the cutting unit 3 is grounded. As shown in FIG. 14, the shim plate 60 is locked to the both support rods 57 to maintain the mounting posture. Although not shown, by attaching another shim plate to the front surface of the front spring receiving member 51 in the elastic urging mechanism 50, the amount of compressive deformation of the coil spring 53 in a state in which the cutting unit 3 is grounded is changed to change the grounding body 46. You can also set and adjust the ground pressure.

  As shown in FIG. 10, the control valve V that controls the operation of the single-acting hydraulic cylinder 12 that moves up and down the mowing unit 3 “rises” that supplies pressure oil to the hydraulic cylinder 12, and drains oil from the hydraulic cylinder 12. It is composed of a three-position switching valve that can be switched to “down” and “neutral” to prevent pressure oil supply and drainage to the hydraulic cylinder, and is linked to the control lever 20 provided in the operating section 4. ing. The control lever 20 can be swung in the front / rear and left / right directions and is neutrally biased. When the control lever 20 is operated to the front “up” position or the rear “down” position, the control valve V Is switched to “up” or “down”, and the control lever V is returned to “neutral” by holding the control lever 20 in a free state and holding it in “neutral”. Further, by operating the control lever 20 to the left and right, a speed difference is brought to the left and right crawler traveling devices 1 so that the traveling machine body 2 is steered in the lever operating direction.

  During the cutting operation, the control lever 20 is operated to the “down” position to lower the weight of the cutting unit 3, and the control lever 20 is returned to “neutral” after confirming that the lowering is prevented by grounding. In this state, the hydraulic cylinder 12 is not shortened any more, but since the plunger 12a can be pulled out by an external force, the cutting part 3 can be raised by the external force. Accordingly, when traveling in this state, when the cutting unit 3 approaches a bulge on the ground or when the traveling machine body 2 tilts forward and downward, the cutting unit 3 rises following the ground contact. Even if the cutting part 3 reaches the recess on the ground or the traveling machine body 2 tilts forward, the cutting part 3 descends at a height corresponding to the length of the hydraulic cylinder 12 when it is first lowered and grounded. It will never go down.

  In this way, by performing the cutting and running with the mowing unit 3 lightly supported on the ground, the weeding tool 48 at the tip of the mowing unit can be moved even when the farming field is undulated or the front and back tilt posture of the traveling machine body 2 is changed. It is possible to perform low cutting while avoiding rushing into the area.

  If the control lever 20 is kept in the “down” position and the hydraulic cylinder 12 is maintained in a shortenable state, the mowing unit 3 can follow the concave portion on the ground.

  The cutting unit 3 configured as described above can swing and swing leftward and outward for inspection and maintenance. That is, as shown in FIG. 7, when the bolt 33 connecting the free end side of the turning arm 32 to the base 18 is removed, the turning arm 32 and the turning bracket 31 can be turned around the longitudinal fulcrum X integrally. Thus, the cutting part 3 supported by the turning arm 32 can turn together with the cutting part lateral movement mechanism 34.

  As shown in FIGS. 5 and 6, an operating rod 65 is inserted into and supported by the bearing bracket 21 so as to be slidable horizontally, and a block member 66 for lowering locking is connected to the right side through end of the operating rod 65. The left end portion of the operation rod 65 is extended and an operation knob 67 is attached, so that the operation rod 65 can be pushed and pulled from the lateral side of the machine body. Normally, the operation rod 65 is pulled out to the outside of the machine body, and the block member 66 is placed and held at a lock release position ur (see FIG. 5) that is closer to the left side than the upper end of the swivel bracket 31.

  To open the mowing unit 3 from the normal position shown in FIG. 3 (a) to the left lateral outer side as shown in FIG. 3 (b), first the mowing unit 3 is raised to a predetermined height or more. In this state, slide and move to the left stroke end. Next, the operating rod 65 is pushed inward to the movement limit to move the block member 66 from the unlocking position ur to the lowered locking position r (see FIG. 6) near the end of the turning bracket 31. Next, the cutting part 3 is lowered (down its own weight), and the block member 66 is sandwiched between the contact fitting 68 connected and fixed to the base of the cutting part frame 17 and the upper surface of the swivel bracket 31, and beyond that The mowing unit 3 is prevented from being lowered (see FIG. 13). Thus, in a state in which the lowering is prevented via the block member 66, the cutting unit 3 is separated from the elastic biasing mechanism 50 and is held at a height raised from the ground.

  The base 18 provided at the front end of the traveling machine body 2 is equipped with a lateral movement lock mechanism 70 that prevents the cutting unit 3 that has been slid laterally to the left stroke end from moving in the right direction. The lateral movement lock mechanism 70 is equipped with a lock member 71 that can be switched between a lateral movement lock position (a) and a lock release position (b). The lock member 71 is formed by bending a plate material into a V shape, and is fastened and fixed to the base 18 so that the position can be adjusted only in the front-rear direction via a long hole 72 in the front-rear direction and a pair of front and rear bolts 73. ing.

  Usually, the lock member 71 is held at the unlocking position (b) that is rearwardly removed from the lateral movement region of the proximal boss portion 17a in the cutting portion frame 17, and in this state, the cutting portion 3 can be moved laterally by sliding. It becomes. When the lock member 71 is at the rear unlocking position (b), the lock member 71 overlaps above the bolt connecting portion between the turning arm 32 and the base 18 and a tool cannot be applied to the bolt 33. Further, when the cutting part 3 is at the right stroke end, the proximal boss part 17a is positioned in front of the lock member 71, and the lock member 71 cannot be switched to the front lateral movement lock position (a).

  In order to turn the mowing part 3 open, first, the mowing part 3 is slid laterally to the left stroke end, and the mowing part 3 is floated on the ground using the block member 66 as described above. Next, a tool such as a wrench is inserted from the operation unit 4 to loosen the bolt 73 of the lateral movement lock mechanism 70, and the lock member 71 in the unlocking position (b) is moved to the front lateral movement lock position (a). And fix with bolts. The locking member 71 in the lateral movement lock position (a) interferes with the lateral movement region on the right side of the proximal boss portion 17a in the cutting portion frame 17, and thereby the cutting portion 3 slides and moves in the right direction. Is blocked.

  Next, the connection pin 39 that connects the cutting unit frame 7 and the plunger 12a of the hydraulic cylinder 12 is pulled out to release the connection, and the free end side of the swivel arm 32 is connected to the base 8a. 33 is removed. As a result, the mowing part 3 can be swung and released around the longitudinal fulcrum X while being kept floating from the ground. Although not shown, the swing arm 32 is pin-locked to the base 18 at the swing open position.

  [Other Examples]

  (1) As shown in FIG. 22, the grounding body 46 is bent downward so that the front and rear middle of the grounding surface F is the lowest, and the first half of the grounding surface F is configured to be a rearwardly inclined surface. It can also be implemented. It is also possible to configure the ground contact surface F in the shape of an arcuate surface that is curved downward in a side view.

  (2) A plurality of types of support rods 49 provided with grounding bodies 46 having different angles of the grounding surface F are prepared in advance, and specifications of the cutting part 3 to be connected to the traveling machine body 2 (the number of cutting lines, weight, auxiliary pulling) It is preferable to use a suitable one corresponding to the presence or absence of a device.

  (3) The grounding body 46 can be configured to be swingable up and down with the front end as a fulcrum, and the angle of the grounding surface F can be changed according to the specifications of the cutting part.

Overall side view of self-removing combine Overall plan view of self-removing combine Plan view showing the turning opening operation of the mowing unit Side view showing the base of the mowing part The front view which shows the base of the cutting part laterally moved to the turning impossible position The front view which shows the base of the cutting part laterally moved to the turning operation possible position The top view which shows the base of the cutting part laterally moved to the turning impossible position The top view which shows the base part of the cutting part laterally moved to the turning operation possible position Plan view showing the base of the cutting part during turning Side view showing the lateral movement structure of the cutting part Side view showing the lateral movement structure and elastic urging mechanism of the cutting part Front view of elastic biasing mechanism Transverse plan view of elastic biasing mechanism Front view showing support structure of elastic urging mechanism Side view showing the base of the cutting part in the lowered lock state Longitudinal front view of hydraulic cylinder connection Side view of the lateral movement lock mechanism The perspective view which shows the locking member of a lateral movement locking mechanism Longitudinal side view showing the grounding part at the lower end of the cutting part Plan view showing the grounding part at the lower end of the cutting part Longitudinal rear view of grounding body connection Longitudinal side view showing another embodiment of the grounding part at the lower end of the cutting part

Explanation of symbols

2 traveling machine body 3 cutting part 46 grounding body 47 weeding frame 47a supporting flange 48 weeding tool 49 supporting rod 49a connecting flange 50 elastic biasing mechanism F grounding surface

Claims (3)

A harvesting part raising / lowering structure of a combine configured to raise and lower a cutting part arranged to swing up and down at the front part of a traveling machine body,
The mowing portion is configured to elastically receive and support the elastic biasing mechanism, and includes a grounding body that is long at the front and rear at the lower end portion of the mowing portion,
The grounding body is arranged along the lower part of the weeding frame in the cutting part, and the grounding surface of the grounding body is grounded so that the rear part of the grounding body comes in contact with the front end part as the cutting part descends. The harvesting part ascending / descending structure of the combine, characterized in that it has an inclined surface that is rearwardly lowered.   A support rod provided with a weeding tool is inserted and fixed to the front end of the weed frame arranged in a cantilever direction facing forward, and the grounding body is connected to the support rod and the rear portion of the grounding body is divided into the weeds. The combine lifting part raising / lowering structure according to claim 1, wherein the structure is configured to contact and support the frame from below.   A connecting flange joined to a support flange fixed to the front end of the weed frame and bolted and connected is provided in the front and rear middle of the support rod, and the front and rear intermediate parts of the grounding body are connected to the connection flange. The harvesting part raising / lowering structure of a combine according to claim 2.

Images