JP4422601B2 - Positioning device and foldable agricultural machine - Google Patents

Description

  The present invention relates to a positioning device that positions a foldable folding work body at a predetermined unfolding work position, and a foldable agricultural working machine including the positioning device.

  Conventionally, for example, a work machine main body (central work body) connected to the rear part of a tractor, and a pair of left and right which are rotatably provided at both left and right ends of the work machine main body and can be switched between a folded state and an unfolded state by rotation. There is known a three-fold foldable agricultural machine including a folding work body (extension work body) and driving means such as an electric motor for rotating each folding work body (for example, see Patent Document 1). .

In this type of foldable agricultural working machine, for example, as shown in FIG. 7, one clutch pawl member 3 and one fitting are fitted on the flange portion 2 of the tilling shaft (center side tilling shaft) 1 of the working machine body. A joint member (cone plate) 4 is attached by a fixture (bolt, nut, etc.) 5, and the other clutch pawl member 8 and the flange portion 7 of the tilling shaft (side tilling shaft) 6 of the folding work body are provided. The other fitting member (cone plate) 9 is attached by a fixture (bolts, nuts, etc.) 11 through a thin plate-like shim 10, and both clutch pawl members 3, 8 are engaged when the folding work body is unfolded. In addition, the fitting members 4 and 9 are fitted together so that power is transmitted from the tilling shaft 1 side of the work implement body to the tilling shaft 6 side of the folding work body.
JP 2003-111503 A

  However, in the above conventional foldable agricultural work machine, in order to position the folding work body at a predetermined unfolding work position when the folding work body is unfolded in the case where the position shift occurs due to a manufacturing error or aged deterioration, etc. For example, a complicated operation of releasing the fixing by each fixing tool 11 and increasing the number of shims 10 between the flange portion 7 and the fitting member 9 may be required.

  The present invention has been made in view of such a point, and without performing a complicated work of increasing the number of shims by releasing the fixation by the fixture, the folding work body can be expanded by a simple adjustment work. An object of the present invention is to provide a positioning device and a foldable agricultural working machine that can position a folding work body at a predetermined unfolding work position.

The positioning device according to claim 1 is a positioning device for positioning the folding work body at a predetermined unfolding work position when the folding work body of the folding agricultural working machine is unfolded. The base body and the base body A contact body having a contact portion whose position can be adjusted by operation of the operation portion, and a contacted body for positioning the folding work body at a predetermined deployment work position by contact with the contact portion. And the operation part of the contact body is constituted by a bolt member that can be rotated, and the contact part of the contact body is left and right with respect to the base body by the rotation operation of the bolt member. The position can be adjusted along the direction .

The positioning device according to claim 2 is the positioning device according to claim 1, wherein the contact body has a nut portion into which a bolt member is screwed, and is provided on the base body so as to be movable in the front-rear direction. A movable part; a contact part that contacts the contacted body; a second movable part that is provided on the base body so as to be movable in the left-right direction; and that contacts the first movable part; When the member is rotated, the first movable part moves, and the second movable part moves by the movement of the first movable part.

The foldable agricultural work machine according to claim 3 is a work machine main body, a foldable work body that is rotatably provided on the work machine main body and can be switched between a folded state and an unfolded state by the rotation, and the folding machine. The positioning apparatus according to claim 1 or 2, wherein the folding work body is positioned at a predetermined unfolding work position when the work body is unfolded .

According to the first aspect of the present invention, the folding work body is positioned at a predetermined unfolding work position by the contact between the contact body having a contact portion whose position can be adjusted by operation of the operation section and the contact portion. Since the folding work body can be positioned at a predetermined unfolding work position when the folding work body is unfolded by simple adjustment work , the contact portion of the contact body is a bolt. Since the position can be adjusted by rotating the member, the position of the contact portion of the contact body can be easily adjusted by rotating the bolt member.

According to the second aspect of the present invention, when the bolt member is rotated, the first movable part moves, and the second movable part moves due to the movement of the first movable part.

  According to the invention which concerns on Claim 3, a folding work body can be located in a predetermined | prescribed deployment work position at the time of the expansion | deployment state of a folding work body by simple adjustment work, and an appropriate operation | work is possible with a folding work body. it can.

  An embodiment of the present invention will be described with reference to the drawings.

  In FIG. 1, reference numeral 21 denotes a three-fold foldable agricultural machine. The foldable agricultural machine 21 is a towing type scraper used by being connected to a tractor (not shown) as a traveling vehicle. Then, the farm work machine 21 selectively performs the scraping work and the earthing work while moving the field forward by the traveling of the tractor while being connected to the tractor.

  The foldable farm work machine 21 includes a work machine body (central work part) 22 that is connected to a three-point link part (work machine lifting device) at the rear of the tractor, and both left and right ends of the work machine body 22 It is provided in the part so as to be pivotable in the vertical direction via the pivot center shaft 23, and is folded into a folded state (folding non-working state) and unfolded state (deployment working state) by pivoting around the pivot center shaft 23. A pair of left and right folding work bodies (extension work parts) 24 that can be switched are provided.

  Further, the foldable agricultural work machine 21 is operated when the folding work body 24 is in the unfolded state, and the driving means 25 including a hydraulic cylinder that rotates the folding work body 24 in the vertical direction around the rotation center axis 23. A positioning device 26 is provided as stopper means for positioning the folding work body 24 at a predetermined unfolding work position (appropriate work position) with respect to the machine body 22.

  The work machine body 22 includes a machine body 31 connected to a three-point link part (work machine lifting device) at the rear of the tractor. Between the chain case part (not shown) of the machine body 31 and the bracket part 32, there is a rotary type cultivating body 34 that performs cultivating work while receiving power from the input shaft 33 side in the front-rear direction via the transmission means and rotating. It is provided so as to be rotatable. A substantially plate-shaped leveling body (not shown) that performs leveling work while rotating up and down to follow the farm scene at the rear position of the fielding body 34 at the rear end of the field cover 31 of the body 31 Is provided so as to be rotatable in the vertical direction via a rubber plate which is an elastic plate.

  The tilling body 34 of the work machine main body 22 includes a chain case portion (not shown) of the body 31 and a tilling shaft 36 extending in the left-right direction extending from the bracket portion 32 and tilling claws radially attached to the tilling shaft 36. Etc. Further, the leveling body of the work implement main body 22 includes a first leveling plate (level plate) having an upper end attached to a rubber plate attached to the rear end of the tillage cover 35 and a lower end of the first leveling plate. The upper end portion is constituted by a second leveling plate (rake) or the like attached to be rotatable.

  Although not shown in FIG. 1, one clutch pawl member and one fitting member (cone plate) are fixed to the flange portion of the tilling shaft (center side tilling shaft) 36 of the work machine body 22. The other clutch pawl member and the other fitting member (cone plate) are thin plate-like on the flange portion of the tilling shaft (side-side tilling shaft) of the folding work body 24. It is attached with fixtures (bolts, nuts, etc.) via shims. When the folding work body 24 is in the unfolded state, both the clutch pawl members are engaged and the both fitting members are engaged with the folding work body 24 being positioned at the predetermined unfolding work position by the positioning device 26. Then, power is transmitted from the tilling shaft side of the work machine body 22 to the tilling shaft side of the folding work body 24 (see FIG. 7).

  The folding work body 24 includes a machine body 41 provided on the rotation center axis 23 of the work machine body 22 so as to be rotatable in the vertical direction around the rotation center axis 23. The machine body 41 includes a rotary-type tiller 42 that performs a tilling operation while receiving power from the tiller body 34 side of the central work machine body 22 via a clutch claw member and the like when the folding work body 24 is unfolded. Is rotatably provided. At the rear end of the tilling cover 43 of the machine body 41, a substantially plate-shaped leveling body (not shown) that performs leveling work while rotating up and down so as to follow the field scene at the rear position of the tilling body 42 Is provided so as to be rotatable in the vertical direction via a rubber plate which is an elastic plate.

  The cultivating body 42 of the folding work body 24 is configured by a left and right longitudinal cultivating shaft 45 installed on a pair of bracket portions 44 of the machine body 41 and cultivating claws attached to the cultivating shaft 45 in a radial manner. Yes. Further, the leveling body of the folding work body 24 includes a first leveling plate (level plate) having an upper end attached to a rubber plate attached to the rear end of the tilling cover 43, and a lower end of the first leveling plate. It is comprised with the 2nd leveling board (rake) etc. by which the upper end part was attached rotatably.

  As shown in FIGS. 2 to 4, the positioning device 26 includes a base body 51 provided at the end of the machine body 41 of the folding work body 24, and the base body 51 includes the folding work body 24. An abutment body 54 having an abutment plate portion 53 that is an abutment portion whose position can be adjusted along the left-right direction by operating the operation portion 52 in the unfolded state is provided. Further, the folding work body 24 is brought into contact with the contact plate portion 53 of the contact body 54 on the folding work body 24 side when the folding work body 24 is in the unfolded state. A contacted body 55 is provided for positioning the at a predetermined deployment work position.

  Here, the base body 51 has a substantially rectangular mounting plate portion 56 fixed to the end portion of the machine body 41 of the folding work body 24, and is opposed to each other from positions near both ends of the mounting plate portion 56. The plate part 57 protrudes, and the protruding plate part 58 with the long hole 59 which protrudes from the both side edges of the mounting plate part 56 is protruded.

  The abutment body 54 has an operation portion 52 constituted by a bolt member 60 that can be rotated, and this operation portion 52 is provided on one opposing plate portion 57 of the base body 51. Further, the abutment body 54 is provided on the projecting plate portion 58 of the base body 51 through a pin or the like along the elongated hole 59 so as to be movable in the front-rear direction (vertical direction in FIG. 3). The bolt member 60 is screwed into the nut portion 62 of the first movable portion 61.

  Further, the contact body 54 has a second movable portion 63 provided between the protruding plate portions 58 of the base body 51 so as to be movable in the left-right direction, which is the horizontal direction, along the protruding plate portion 58. The second movable portion 63 is urged toward the first movable portion 61 by a spring 65 that is an urging means held by a spring retainer 64 fixed to the counter plate portion 57, and is moved in the front-rear direction of the first movable portion 61. On the other hand, a slightly inclined contact surface 61a and a contact surface 63a slightly inclined with respect to the front-rear direction of the second movable portion 63 are in surface contact with each other. Further, the contact plate portion in which the substantially rectangular plate portion 66 along the front-rear direction of the second movable portion 63 contacts the substantially cylindrical contact portion 67 of the contact body 55 on the work machine body 22 side. 53.

  Then, the contact plate portion 53 of the second movable portion 63 of the contact body 54 moves along the left-right direction (horizontal direction) with respect to the base body 51 by rotating the bolt member 60 that is the operation portion 52. The position can be adjusted. That is, the distance between the mounting plate portion 56 of the base body 51 and the contact plate portion 53 of the contact body 54 can be finely adjusted (approximately 2 to 3 mm) by the turning operation of the bolt member 60. ing.

  In the state shown in FIG. 3, the first movable portion 61 of the contact body 54 is located at the front side position of the base body 51, and the contact surface 61 a of the first movable portion 61 is located on the front side of the contact surface 63 a of the second movable portion 63. They are in contact. From this state, when the operator rotates the bolt member 60 using a tool, the contact surface 61a of the first movable portion 61 slides along the contact surface 63a of the second movable portion 63, and the first movable portion 61 is moved. 4 moves, and the movement of the first movable portion 61 causes the second movable portion 63 to move toward the abutted body 55 against the bias of the spring 65, resulting in the state shown in FIG. The state shown in FIG. 4 is a state in which the distance between the mounting plate portion 56 of the base body 51 and the contact plate portion 53 of the contact body 54 is maximized.

  Next, the operation and the like of the one embodiment will be described.

  In the case of performing the cutting work with the maximum work width, the folding work body 24 side is rotated by rotating the left and right folding work bodies 24 around the rotation center axis 23 by the driving means 25 toward the deployment direction. The contact plate portion 53 of the contact body 54 and the contacted portion 67 of the contacted body 55 on the work machine main body 22 side are brought into contact with each other, so that the folding work body 24 is brought into a predetermined deployment work position. Positioned.

  Thus, when the farm work machine 21 with the folding work body 24 set in the unfolded state is moved by traveling of the tractor, the plowing work is performed with the plowing body 34 of the work machine body 22 and the plowing work body 42 of the left and right folding work bodies 24. The leveling work is performed by the leveling body of the work machine body 22 and the leveling bodies of the left and right folding work bodies 24.

  And, for example, when the position of the folding work body 24 in the unfolded state deviates from a predetermined unfolded work position (appropriate position) due to, for example, manufacturing errors of parts or deterioration over time, the folding work In order to position the folding work body 24 at a predetermined unfolding work position when the body 24 is in the unfolded state, by rotating the bolt member 60 that is the operation part 52, the contact plate part 53 of the contact body 54 Adjust the horizontal position. For example, the distance between the mounting plate portion 56 of the base body 51 and the contact plate portion 53 of the contact body 54 is increased by about 2 mm.

  In the case of performing the cutting work only with the central work machine body 22, the left and right folding work bodies 24 are rotated by the driving means 25 around the rotation central axis 23 in the folding direction and folded. Set to state.

  Then, according to the above-described embodiment, the folding work body 22 is brought into contact with the contact body 54 having the contact plate portion 53 whose position can be adjusted by the operation of the operation portion 52, and the contact plate portion 53. And a contacted body 55 having a contacted portion 67 that is positioned at a predetermined deployment work position, so that the operation unit 52 can be operated without a complicated operation of increasing the number of shims by releasing the fixing by the fixing tool. By the simple adjustment work of adjusting the position of the contact plate portion 53 by the turning operation, the folding work body 24 can be positioned at a predetermined unfolding work position when the folding work body 24 is unfolded.

  Note that the positioning device 26 is not limited to the one provided with the contact body 54 including the first movable portion 61, the second movable portion 63, the spring 65, and the like. For example, as shown in FIG. The thing provided with the contact body 54 may be sufficient. The pantograph-type contact body 54 is configured such that the bolt member 60 constituting the operation portion 52 is supported by four rotation arms 71, and the mounting plate portion of the base body 51 is operated by the rotation operation of the bolt member 60. The distance between 56 and the contact plate portion 53 of the contact body 54 can be adjusted.

  Further, as shown in FIG. 6, a contact plate 53 is provided on a protruding rod 72 protruding from the mounting plate portion 56 of the base body 51 so as to be movable along the protruding rod 72, and the bolt member 60 is rotated. It is also possible to adjust the distance between the mounting plate portion 56 of the base body 51 and the contact plate portion 53 of the contact body 54.

  Furthermore, it is not limited to the configuration in which the operator directly rotates the bolt member 60 manually, and the driving means such as a hydraulic cylinder or a motor outputs power to rotate the bolt member 60. Good.

  Further, the base body 51 and the contact body 54 are not limited to the configuration in which the base body 51 and the contact body 54 are provided on the folding work body 24 side, and the contact body 55 is provided on the work machine main body 22 side. A configuration in which the contact body 55 is provided on the folding work body 24 side may be provided on the work machine body 22 side.

It is a partial front view of one embodiment of the folding type agricultural farm machine of the present invention. It is a front view of the positioning apparatus of an agricultural working machine same as the above. It is a bottom view of a positioning apparatus same as the above. It is a bottom view at the time of the maximum distance of a positioning device same as the above. It is a figure which shows the modification of a positioning apparatus same as the above. It is a figure which shows the further modification of a positioning apparatus same as the above. It is a figure which shows the tilling shaft clutch part of a folding type agricultural working machine.

21 Folding agricultural machine
22 Work implement body
24 Folding work body
26 Positioning device
51 base body
52 Control panel
53 Contact plate part which is contact part
54 Abutment body
55 Contact object
60 Bolt member
61 1st moving part
62 nut part
63 2nd moving part

Claims (3)

A positioning device for positioning the folding work body at a predetermined unfolding work position when the folding work body of the foldable agricultural working machine is unfolded,
A base body,
An abutting body provided on the base body and having an abutting portion whose position is adjustable by operation of the operating portion;
A contacted body for positioning the folding work body at a predetermined deployment work position by contact with the contact part ;
The operation part of the contact body is constituted by a bolt member that can be rotated,
The positioning device is characterized in that the position of the contact portion of the contact body can be adjusted along the left-right direction with respect to the base body by a rotation operation of the bolt member . The contact body is
A first movable portion having a nut portion into which a bolt member is screwed, and provided on the base body so as to be movable in the front-rear direction;
A contact portion that contacts the contacted body, a second movable portion that is provided on the base body so as to be movable in the left-right direction, and that contacts the first movable portion;
When the bolt member is rotated, the first movable part moves, and the second movable part moves due to the movement of the first movable part.
The positioning device according to claim 1. The work machine body,
A folding work body that is rotatably provided in the work machine body, and can be switched between a folded state and an unfolded state by turning,
A folding agricultural work machine comprising: the positioning device according to claim 1 or 2, wherein the folding work body is positioned at a predetermined unfolding work position when the folding work body is unfolded.

Images