JP2005013104A - Covering apparatus for agricultural machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a covering apparatus for an agricultural machine for preventing scattering soil tilled by a tilling rotor off a covering member irrespectively of the vertical position of the tilling rotor. <P>SOLUTION: The covering apparatus 50 includes a swing arm part 51 functioning to vertically move a ceiling side cover 25 covering the upper space of a ceiling treatment rotor 24 supported in a vertically movable manner. The swing arm part 51 constitutes a link mechanism with upper link members 52 vertically spaced from each other and a lower link member longer than the upper link member 52. The lower link member is a 2nd power transmission case 26b supporting the ceiling treatment rotor 24. The upper link members 52 are pivotally joined between a tilling side cover 35 covering a pretreatment section and the ceiling side cover 25. The swing arm part 51 functions to turn the ceiling side cover 25 along the outer circumference of the ceiling treatment rotor 24 while keeping the cover 25 in nearly the identical posture in such a way that the upper link members 52 swing vertically via the ceiling side cover 25 when the 2nd power transmission case 26b swings vertically. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cover device for an agricultural machine, and more particularly, to a cover device for an agricultural machine in which a cover portion that covers an upper portion of a working portion that performs a predetermined operation is movable as the working portion moves up and down.
[0002]
[Prior art]
Agricultural machines generally include a working unit that performs predetermined work on a farm field, and a cover member for preventing scattering of soil cultivated by the working unit is provided above the working unit. is there. An agricultural machine is also known in which the working portion is configured to be movable in the vertical direction so that the working depth performed by the working portion can be adjusted.
[0003]
Agricultural machinery that can move the working part up and down is connected to the tip of the support arm provided on the tractor by connecting the connecting bracket that extends to the upper part of the working part to the rotating shaft that supports the working part in a rotatable manner. However, there is a configuration in which the working portion is configured to be movable up and down by swinging the support arm up and down (see Patent Document 1). The upper part of this working part is covered with a cover member extending in the front-rear direction. A plate extending in the front-rear direction is attached to an upper portion of the cover member, and a bracket that is fixed to the connect bracket and is movable in the front-rear direction along the plate is attached to the plate. A support rod having one end pivoted to the tractor and extending to the plate and the other end pivoted to the plate is connected to the plate. For this reason, when the support arm swings in the vertical direction, the working unit moves in the vertical direction around the rotation fulcrum of the support arm, and the support bar swings in the vertical direction so that the plate moves to the bracket. In contrast, the cover member is moved in the front-rear direction, and the cover member is moved in the front-rear direction with respect to the bracket.
[0004]
[Patent Document 1]
Japanese Examined Patent Publication No. 53-27165 (pages 1 and 2, Fig. 2)
[0005]
[Problems to be solved by the invention]
As a result, when the working unit moves up and down, the cover member moves toward or away from the tractor, so that the relative positional relationship of the cover member with respect to the working unit is shifted. For this reason, if the front side or the rear side of the working part covered by the cover member is exposed and the working part performs a predetermined work in this state, a part of the soil plowed by the working part is restricted by the cover member. The problem of splashing occurs.
[0006]
The present invention has been made in view of such problems, and in a working unit that is movable in the vertical direction, even if the working unit moves in the vertical direction, the soil plowed by the working unit is the cover member. An object of the present invention is to provide a cover device for an agricultural machine that is regulated and can prevent scattering of soil.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the cover device of the agricultural machine according to the present invention (for example, the coater 1 and the management work machine 60 in the embodiment) is a work machine side main body (for example, a work machine side body part) An offset frame 5 and a main frame 61 in the embodiment and a work unit (for example, a work unit) that is supported by the work machine side main body unit so as to be rotatable and movable in the vertical direction, and that performs a predetermined work on the field. A cover device for an agricultural machine provided with a top field processing rotor 24 and a medium tilling rotor 64) in the form of the above, which covers the upper part of the working part and is rotatably supported along the outer periphery of the working part. A cover part movable in the vertical direction together with the part, one end side is pivotally connected to the work machine side main body part, the other end side is pivotally connected to the cover part, and the other end side is swingable in the vertical direction And the working part is on Moving in the direction, and a swinging arm portion for vertically moving the cover portion while the orientation of the cover portion in substantially the same state.
[0008]
According to the cover device for an agricultural machine having the above configuration, when the working unit moves in the vertical direction, the swing arm unit moves the cover unit up and down while keeping the posture of the cover unit substantially the same. Regardless of the vertical movement, the relative positional relationship of the working parts covered by the cover part can always be made constant. For this reason, in order to change the working depth of the work such as tilling by the working part, when the vertical position of the working part is adjusted, the soil plowed by the working part is regulated by the cover member. As a result, it is possible to prevent the soil from scattering outside the cover member.
[0009]
In the agricultural machine cover device having the above-described configuration, the swing arm portion includes an upper link member and a lower link member (for example, the second power transmission case in the embodiment) disposed with a space in the vertical direction. 26b), the one end side end of the parallel link mechanism is pivotally connected to the work machine side body, and the other end of the parallel link mechanism is pivotally connected to the cover. Also good.
[0010]
According to the cover device for an agricultural machine having the above-described configuration, by configuring the swing arm portion with a parallel link mechanism, the posture of the cover portion is always and reliably constant when the cover portion is moved in the vertical direction. Can be in a state.
[0011]
Moreover, in the cover device for an agricultural machine having the above-described configuration, the swing arm portion includes an upper link member disposed with a gap in the vertical direction, and a lower link member having a length different from the length of the upper link member. (For example, the second power transmission case 26b and the power transmission case 66 in the embodiment), and one end side end portion of the link mechanism is pivotally connected to the work machine side main body portion. The other end side end portion may be pivotally connected to the cover portion.
[0012]
According to the cover device for an agricultural machine having the above-described configuration, the swing arm portion includes the upper link member disposed with a gap in the vertical direction, and the lower link member having a length different from the length of the upper link member. By configuring the link mechanism with the cover member, the cover member can be moved in the vertical direction while keeping the posture of the cover member substantially constant. For this reason, the cover apparatus which makes the attitude | position of a cover member substantially constant by simple structure can be provided.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. This embodiment will be described below using an example of a basket coater and a management work machine for agricultural machines.
For convenience of explanation, the directions of arrows shown in FIG. 1 (perspective view) and FIG. 5 (side view) will be described below as the front-rear direction and the left-right direction.
[0014]
[First Embodiment]
First, a first embodiment of a cover device for an agricultural machine according to the present invention will be described. In addition, the agricultural machine in which the cover device is mounted takes a basket coater as an example. First, before describing the cover device, a wrinkle coater on which the cover device is mounted will be described. As shown in FIG. 2B (side view), the scissor coater 1 is connected to a three-point link connecting mechanism 81 provided at the rear part of the traveling machine body 80, so that A painting operation is performed. The hull coater 1 is attached to the front side of the hitch frame 2 extending in the left-right direction and can be connected to the three-point link connecting mechanism 81, and the front end side of the hitch frame 2 is rotatable at the center of the hitch frame 2. And an offset frame 5 whose rear end side is turnable in the left-right direction, and a working portion 10 that is connected to a rear end portion of the offset frame 5 so as to be rotatable in the left-right direction.
[0015]
A gear box 4 is provided at the lower center of the hitch frame 2 in the left-right direction. The input shaft 4a of the gear box 4 is connected to the transmission shaft of the spreader side coupling device 3 from the PTO shaft (not shown) of the traveling machine body 80. Power is transmitted through 3a. The offset frame 5 is a box-shaped member having a hollow inside, and a drive shaft 11 that extends in the vertical direction and is supported rotatably is provided at the rear end portion of the offset frame 5. The drive shaft 11 is configured such that the driving force from the traveling machine body 80 is transmitted through the input shaft 4a of the gear box 4 and a chain transmission mechanism (not shown) disposed in the offset frame 5. Yes. The offset frame 5 can swing in the left-right direction by the expansion and contraction operation of the swing cylinder 12 shown in FIG. 1 pivoted between the offset frame 5 and the hitch frame 2.
[0016]
A rotation center shaft 13 connected to the lower portion of the drive shaft 11 and extending downward is provided at the lower rear end of the offset frame 5. As shown in FIG. 1, a cylindrical rotating shaft case 14 that covers the rotating central shaft 13 is disposed outside the rotating central shaft 13, and its upper end rotates to the lower rear end of the offset frame 5. Connected freely. The rotating shaft case 14 can be rotated by an expansion / contraction operation of a rotating cylinder 15 having one end pivoted to the side of the offset frame 5 and the other end pivoted to the rotating shaft case 14.
[0017]
The aforementioned working unit 10 is attached to the lower part of the rotating shaft case 14. As shown in FIG. 2 (b), the working unit 10 includes a heaven processing unit 21 that cuts the upper part of the old fence formed along the periphery of the farm field, a pre-processing unit 31 that piles up the cut soil, It has a trimming part 41 for painting the piled soil on the old shears that have been cut.
[0018]
The pretreatment unit 31 has a plurality of tilling claws 33 that are radially attached to the outer periphery of a rotating shaft 32 that extends in the lateral direction. The rotating shaft 32 provided with the tilling claws 33 is hereinafter referred to as a tilling rotor 34. A pretreatment power transmission case (not shown) that supports the tillage rotor 34 so as to be rotatable is connected to the tilling rotor 34, and a tip portion of the pretreatment power transmission case is connected to the rotary shaft case 14. A power transmission mechanism (not shown) is built in the pretreatment power transmission case, and the power of the rotation center shaft 13 is transmitted to the tilling rotor 34 via this transmission mechanism. A tilling side cover portion 35 is disposed on the top of the tilling rotor 34 to cover it. The tillage side cover portion 35 is supported via a connecting member 36 connected to the rotary shaft case 14. For this reason, the tilling rotor 34 and the tilling side cover 35 can be rotated about the rotating shaft case 14 as a center of rotation. The rear side of the cultivating side cover part 35 extends to an upper part of the trimming part 41 described later.
[0019]
The trimming unit 41 includes a polyhedral drum 43 attached to a rotating shaft 42 that extends in the left-right direction and is rotatably supported, and a cylindrical portion 44 that is attached to the right end of the polyhedral drum 43 and extends in the lateral direction. . As shown in FIG. 2 (a), the trimming unit 41 is connected to a trimming power transmission case 45 that rotatably supports the trimming unit 41. The trimming power transmission case 45 has one end portion extending into the polyhedral drum 43 to support the trimming portion 41 in a rotatable manner, and the other end portion connected to the rotary shaft case 14 shown in FIG. In the trimming power transmission case 45, a power transmission mechanism capable of transmitting the power from the rotation center shaft 13 shown in FIG.
[0020]
As shown in FIG. 2 (b), the celestial field processing unit 21 is disposed with a predetermined distance in the axial direction on the outer periphery of the rotary shaft 22 and a rotary shaft 22 that extends in the horizontal direction and is rotatably supported. A plurality of earthing claws 23 that extend radially and a rotary cover 22 that includes the earthing claws 23 (hereinafter, these are collectively referred to as “heavenly processing rotor 24”). Have. The cutting nail 23 is formed so as to scrape the upper part of the old ridge formed on the periphery of the field and move it to the inside of the field. As shown in FIG. 2A, one end of the heaven power transmission case 26 is connected to the left end of the heaven side cover 25, and the other end of the heaven power transmission case 26 is shown in FIG. It is connected to the rotating shaft case 14.
[0021]
As shown in FIG. 1, the heaven power transmission case 26 is fixed to the left end portion of the heaven-side cover portion 25 and extends in the lateral direction, and the distal end portion of the first power transmission case 26a. The second power transmission case 26b that is fixed to the front end and extends in the front-rear direction, and is connected to the rear end of the second power transmission case 26b so as to be pivotable in the vertical direction and extends rearward and is fixed to the rotary shaft case 14. A third power transmission case 26c is provided. For this reason, the heaven-side cover portion 25 can swing in the vertical direction around the rotation position of the second power transmission case 26b to the third power transmission case 26c. In the celestial power transmission case 26, as shown in FIG. 2B, a power transmission mechanism (not shown) for transmitting the driving force of the rotation center shaft 13 to the celestial processing rotor 24 is provided. .
[0022]
Next, the cover device 50 that covers the celestial processing rotor 24 will be described. As shown in FIG. 3A (side view), the cover device 50 is configured so that the posture of the heaven-side cover portion 25 is substantially the same regardless of the vertical movement of the heaven-side cover portion 25 and the heaven-field processing rotor 24 described above. While maintaining the same state, there are a swing arm portion 51 that moves the heaven-side cover portion 25 up and down, and a swing cylinder 55 that swings the swing arm portion 51 in the vertical direction. The celestial-side cover 25 is disposed above the celestial processing rotor 24 and extends in the front-rear direction. The celestial-side cover 25 is disposed at the left and right lateral positions of the celestial processing rotor 24 and extends in the vertical direction. It has a pair of side plate portions 25b connected to the left and right ends of the top plate portion 25a. Of the pair of side plate portions 25b, the side plate portion 25b on the heavenly power transmission case 26 side is rotatably connected to the end portion of the first power transmission case 26a as shown in FIG. The swing cylinder 55 is a manually operated telescopic cylinder. One end of the swing cylinder 55 is pivotally connected to the upper portion of the tillage side cover 35 and the other end is pivotally connected to the first power transmission case 26a. For this reason, as shown in FIG. 3A, when the swing cylinder 55 expands and contracts, the heaven processing unit 21 moves up and down around the rotation fulcrum P1 of the second power transmission case 26b.
[0023]
The swing arm portion 51 constitutes a link mechanism having an upper link member 52 disposed at intervals in the vertical direction and a lower link member that is longer than the length of the upper link member 52. The lower link member is the second power transmission case 26b described above. In the case of the upper link member 52, the length of each link member refers to the distance L1 between the pivot positions at both ends of the upper link member 52. In the case of the second power transmission case 26b, the length of each link member is the second power in the side view. The distance L2 between the rotation fulcrum P1 of the transmission case 26b and the point where the center of the rotating shaft 22 intersects the second power transmission case 26b is mentioned. One end of the upper link member 52 is pivotally connected to the lower portion of a connecting member 53 provided at the right end of the tillage side cover 35, and the other end of the upper link member 52 is the heaven-side cover 25. It is pivotally connected to the top plate portion 25a. When the second power transmission case 26b swings upward about the rotation fulcrum P1 as shown in FIG. 3B (side view), the swing arm 51 configured as described above By swinging upward through the field side cover part 25, the heaven side cover part 25 is rotated along the outer periphery of the heaven field processing rotor 24 with the posture of the heaven side cover part 25 being substantially constant. Let
[0024]
For this reason, when the turf processing operation of the old fence is performed by the heaven processing rotor 24, the swing cylinder 55 is expanded and contracted to adjust the depth of the upper part of the old fence to be scraped. Even if the position is changed, the posture of the heaven-side cover portion 25 that covers the celestial processing rotor 24 is maintained in substantially the same posture regardless of the vertical position of the celestial processing rotor 24. As a result, the old dredged soil, etc., scraped off by the heaven processing rotor 24 moves in the heaven-side cover portion 25 and prevents the soil etc. from being scattered outside the heaven-side cover portion 25 in advance. be able to.
[0025]
As shown in FIG. 4A (side view), the swing arm 51 includes an upper link member 52 and a second power transmission case 26b having the same length as the second power transmission case 26b. It may be a parallel link mechanism having In this case, the pivotal position of the distal end portion of the upper link member 52 is the front side of the peripheral portion of the right side plate portion 25 b of the heaven-side cover portion 25. For this reason, as shown in FIG. 4B (side view), even if the swing cylinder 55 is contracted and the celestial processing rotor 24 is moved upward, the celestial side cover portion 25 is not affected by the parallel link mechanism. The posture is maintained by the swing arm 51 that constitutes. That is, by making the swing arm portion 51 a parallel link mechanism, the heaven-side cover portion 25 can always be in a constant posture regardless of the vertical movement of the heaven-processing rotor 24.
As a result, it is possible to more reliably prevent the soil or the like that has been scraped off by the heaven field processing operation from being scattered outside the heaven field side cover portion 25.
[0026]
[Second Embodiment]
Next, a second embodiment of the agricultural machine cover device according to the present invention will be described. An agricultural machine equipped with a cover device will be described with reference to an example of a management work machine that performs plowing and weeding. First, the management work machine will be outlined. As shown in FIG. 5 (side view), the management work machine 60 has a three-point link connection mechanism provided at the rear part of the traveling machine body (not shown) in the management machine side connection part 62 provided in the main frame 61 extending in the left-right direction. Are connected to the rear part of the traveling machine body so as to be movable up and down. A gear box (not shown) is provided at the center lower portion of the main frame 61 in the left-right direction, and power is transmitted to the input shaft of the gear box from a PTO shaft (not shown) of the traveling machine body. .
[0027]
Below the rear side of the main frame 61, a plurality of tillage units 63 are provided that are arranged at a predetermined interval in the direction in which the main frame 61 extends. The middle tilling unit 63 is provided at a lower end portion of a power transmission case 66 that is pivotally coupled to the lower portion of the main frame 61 so as to be swingable in the front-rear direction. The middle tilling unit 63 includes a middle tilling rotor 64 that is rotatably supported at the lower end of the power transmission case 66. The middle tilling rotor 64 has a plurality of tilling claws 65 at its peripheral edge, and the driving force from the traveling machine body is transmitted through the input shaft of the gear box and the transmission mechanism provided in the power transmission case 66. Yes.
[0028]
A cover device 70 is provided above the middle tilling rotor 64. The cover device 70 is disposed at a position above the middle tilling rotor 64 and extends in a substantially horizontal direction to cover the upper portion of the middle tilling rotor 64, and the posture of the covering portion 71 when the middle tilling rotor 64 moves in the vertical direction. It has a swinging arm portion 73 that moves the cover portion 71 up and down while maintaining the substantially same state. The cover portion 71 is fixed to the upper end portion of a swing support shaft 72 supported on the lower end portion of the power transmission shaft case 66 so as to be swingable in the front-rear direction.
[0029]
The swing arm portion 73 is pivotally connected to a tip portion of a bracket 67 protruding from the upper portion of the power transmission case 66 and extends downward along the power transmission case 66, and a lower end portion is pivotally connected to the upper portion of the cover portion 71. The upper link member 74 and the power transmission case 66 described above constitute the link mechanism. The power transmission case 66 constitutes a lower link member (hereinafter referred to as “lower link member”) with respect to the upper link member 74, and the length of the power transmission case 66 is longer than that of the upper link member 74. Is also long. The power transmission case 66 is provided with a compression rod 75 whose upper end is pivotally connected to the main frame 61 and whose lower end is pivotally connected to the power transmission case 66 so that the vertical position of the middle tilling rotor 64 can be adjusted. The compression rod 75 is configured to be movable in the vertical direction with respect to the main frame 61. When the vertical position of the compression rod 75 is adjusted, the power transmission case 66 swings in the vertical direction, and the cover portion 71 pivots about the swing fulcrum P2 of the swing support shaft 72 via the bracket 67 and the upper link member 74. Swings back and forth.
[0030]
For this reason, as shown in FIG. 6 (side view), when the compression rod 75 is moved upward, the power transmission case 66 swings upward and the cover portion 71 swings via the upper link member 74. It swings backward with P2 as the swing center. At the same time, the middle tiller rotor 64 moves upward with the pivoting position of the power transmission case 66 as the swing center. That is, when the power transmission case 66 swings upward, the cover portion 71 moves upward together with the middle tilling rotor 64 and swings rearward. For this reason, the cover part 71 is always maintained in a substantially horizontal state regardless of whether the power transmission case 66 swings back and forth. As a result, it is possible to prevent the soil cultivated by the middle tilling rotor 64 from being scattered outside the cover part without being restricted by the cover part 71.
[0031]
【The invention's effect】
As described above, according to the cover device for an agricultural machine according to the present invention, when the working unit moves in the vertical direction, the swinging arm unit moves the cover unit while keeping the posture of the cover unit substantially the same. Since it is moved up and down, the relative positional relationship of the working part covered by the cover part can be made constant regardless of the vertical movement of the working part. For this reason, in order to change the working depth of the work such as tilling by the working part, when the vertical position of the working part is adjusted, the soil plowed by the working part is regulated by the cover member. As a result, it is possible to prevent the soil from scattering outside the cover member.
[Brief description of the drawings]
FIG. 1 is a perspective view of a glazing machine equipped with a cover device according to a first embodiment of the present invention.
2A and 2B are diagrams showing the glazing machine, wherein FIG. 2A is a plan view of the glazing machine, and FIG. 2B is a side view of the glazing machine.
FIG. 3 is a side view of the cover device for explaining the operation of the cover device.
FIG. 4 is a side view of the cover device for explaining the operation of the cover device in which the swing arm portion constitutes a parallel link mechanism.
FIG. 5 is a side view of a management work machine equipped with a cover device according to a second embodiment of the present invention.
FIG. 6 shows a side view of the management work machine.
[Explanation of symbols]
1 Straw coater (agricultural machinery)
5 Offset frame (worker side main body)
24 Heavenly processing rotor (working part)
25 The sky side cover (cover)
26b Second power transmission case (lower link member)
50, 70 Cover devices 51, 73 Swing arm portions 52, 74 Upper link member 60 Administrative work machine (agricultural machinery)
61 Main frame (main part of work machine side)
64 Middle tillage rotor (working part)
66 Power transmission case (lower link member)
71 Cover part 80 traveling body

Claims (3)

Agricultural equipment comprising a work machine side main body mounted on a traveling machine body, and a work unit that is supported by the work machine side main body so as to be rotatable and movable in the vertical direction, and that performs a predetermined work on a farm field. Machine cover device,
A cover portion that covers the upper portion of the working portion and is rotatably supported along the outside of the working portion, and is movable in the vertical direction together with the working portion;
One end side is pivotally connected to the work implement side main body part, the other end side is pivotally connected to the cover part, the other end side is swingable in the vertical direction, and the working part is in the vertical direction. A cover device for an agricultural machine, comprising: a swinging arm portion that moves the cover portion up and down while keeping the posture of the cover portion in substantially the same state when moved. The swing arm portion is a parallel link mechanism having an upper link member and a lower link member arranged with an interval in the vertical direction,
The one end side end of the parallel link mechanism is pivoted to the work machine side main body, and the other end side end of the parallel link mechanism is pivoted to the cover part. Agricultural machinery cover equipment. The swing arm portion is a link mechanism having an upper link member disposed with a gap in the vertical direction and a lower link member having a length different from the length of the upper link member,
2. The agriculture according to claim 1, wherein one end of the link mechanism is pivotally connected to the work machine side main body, and the other end of the link mechanism is pivotally connected to the cover. Machine cover device.

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