JP6320168B2 - Agricultural machine - Google Patents

Description

  The present invention relates to an agricultural machine that can be connected to a quick coupler mounted on a traveling vehicle.

  Conventionally, a quick coupler (auto hitch device) is known as a device for facilitating connection of a farm work machine to a three-point link hitch part (work machine lifting support device) of a tractor that is a traveling vehicle (for example, Patent Document 1).

  For example, FIG. 7 shows a state in which the three-point connecting portion 2 of the rotary working machine 1 that is an agricultural working machine is connected to the three-point link hitch portion 4 at the rear portion of the tractor 3 via the quick coupler 5.

  This quick coupler 5 is a so-called “four-set coupler”, which is mounted in advance on the three-point link hitch portion 4 of the tractor 3 and a power transmission joint for transmitting power from the PTO shaft 6 of the tractor 3 ( The input shaft connecting portion 8 of the universal joint 7 is supported.

  When the rotary work machine 1 is connected to the tractor 3, after the tractor 3 is moved close to the rotary work machine 1 by back running, the three-point link hitch portion 4 of the tractor 3 is lifted by a hydraulic device. The three-point connecting portion 2 of the work machine 1 is engaged and connected to the upper hook portion 5a and the left and right lower hook portions 5b of the quick coupler 5, and at the same time, the input shaft 10 of the rotary work device 1 is connected to the input shaft connecting portion of the joint 7. 8 is inserted and connected.

  For this reason, at the time of work, the power output from the PTO shaft 6 of the tractor 3 is input to the input shaft 10 through the joint 7, and the tiller 11 of the rotary work machine 1 is rotated according to the rotation of the input shaft 10. The plowing work is performed by rotating, and the leveling body 12 performs the leveling work behind the plowing body 11.

  By the way, unlike the above-described rotary work machine 1, the farm work machine that can be connected to the quick coupler 5 attached to the tractor 3 does not require power from the PTO shaft side of the tractor and does not have an input shaft. There are non-driven farming machines.

  That is, for example, an agricultural field working machine described in Patent Document 2 is known as such a non-driven agricultural working machine.

  This conventional field work machine includes a machine body having a three-point connecting portion that can be connected to a quick coupler mounted on a tractor, and a work such as an earth plate provided on the machine body for agricultural work such as subsoil crushing work. With body.

JP-A-8-98605 JP 2001-29909 A

  However, in the conventional field work machine (agricultural work machine), when the field work machine is connected to a quick coupler that is attached to the tractor and supports the input shaft connection portion of the joint, There is a case where the soil hangs on the input shaft connecting portion of the joint supported by the quick coupler.

  In such a case, for example, when the worker removes the field work machine from the tractor and instead connects a drive type farm work machine such as a rotary work machine, the worker manually attaches the soil attached to the input shaft connection portion of the joint. Must be removed.

  In addition, in the case where power from the PTO shaft side of the tractor is not required, the joint can be removed, but the joint is heavy (for example, about 20 kg), and the removal work is not easy.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can prevent that soil adheres to the input-shaft connection part of the joint supported by the quick coupler.

The agricultural machine according to claim 1 is an agricultural machine that is attached to a three-point link hitch portion of a traveling vehicle and is connectable to a quick coupler that supports an input shaft connecting portion of a joint for power transmission. A machine body having a connectable three-point connecting portion, a work body provided in this machine body for farming work, and a longitudinal shape having a longitudinal direction in the left and right direction, reinforcing the machine body, and soil from the work body side A reinforcing / preventing means for preventing the input shaft connecting portion from moving toward the input shaft connecting portion , wherein the reinforcing / preventing means is connected to the quick coupler when the three-point connecting portion of the airframe is connected to the quick coupler. It is located near the rear of the input shaft connecting portion and covers the connection hole of the input shaft connecting portion .

The farm machine according to claim 2 is the farm machine according to claim 1, wherein the reinforcing and preventing means is located above and behind the lower pin of the three-point connecting portion of the machine body in a side view.

The agricultural machine according to claim 3 is the agricultural machine according to claim 2, wherein the three-point connecting portion of the airframe has left and right pin support plates for supporting the lower pins, and the reinforcing and preventing means is the left and right pins. It is built on the support plate.

The agricultural machine according to claim 4 is the agricultural machine according to claim 3, wherein the left and right pin support plates have a longitudinal shape having a longitudinal direction in a front-rear direction inclined downward in a side view. It is attached to the front end of the pin support plate, and the reinforcing and preventing means is attached to the longitudinal intermediate portion of the pin support plate.

The agricultural machine according to claim 5 is the agricultural machine according to any one of claims 1 to 4, wherein the reinforcing and preventing means is composed of one longitudinal reinforcing and preventing member having a longitudinal direction in the left-right direction. It is what has been.

  According to the present invention, not only can the body be reinforced by the reinforcing and preventing means, but also soil can be prevented from adhering to the input shaft connecting portion of the joint supported by the quick coupler.

It is a side view of the agricultural working machine which concerns on one embodiment of this invention. It is a front view of an agricultural working machine same as the above. It is a perspective view of an agricultural working machine same as the above. It is a partial side view of an agricultural working machine same as the above. It is a rear view of the quick coupler of the agricultural working machine same as the above. It is a partial side view of the agricultural working machine which concerns on other embodiment of this invention. It is a side view which shows the state which connected the rotary working machine to the tractor via the quick coupler.

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

  In the figure, reference numeral 21 denotes a tractor that is a traveling vehicle. This tractor 21 has a three-point link hitch portion (supporting mechanism for raising and lowering the work implement) that is positioned so that the front end side (rear end side) protrudes rearward from the tire 22 that is the rear wheel. Device) 23 at the rear.

  The three-point link hitch portion 23 can be turned up and down so that the tip side can be moved up and down around the base end side, and the top link 24 that can be turned up and down around the base end side. It has two lower links 25 in a pair of left and right. The three links 24 and 25 are rotated up and down by the operation of a hydraulic device (not shown).

  A quick coupler (auto hitch device) 31 for facilitating the connection of the agricultural machine 30 to the tractor 21 is detachably attached to the three-point link hitch portion 23 at the rear of the tractor 21.

  As shown in FIGS. 1, 4 and 5, the quick coupler 31 is attached to the three-point link hitch portion 23 of the tractor 21 and has an input shaft connection portion 33 of a joint (universal joint) 32 for power transmission. It is something to support.

  That is, the quick coupler 31 is called a “four-set coupler”, and is attached to the three-point link hitch portion 23 of the tractor 21 in advance, and the front end portion is connected to the PTO shaft 26 of the tractor 21. The input shaft connecting portion 33 at the rear end portion of the joint 32 for transmitting the power from the is supported.

  Here, the quick coupler 31 includes a frame portion 36 having a substantially triangular shape. An upper hook portion 37 that is detachably engaged with the upper pin 64 of the agricultural working machine 30 is provided on the upper portion of the frame portion 36. On the left and right sides of the lower portion of the frame portion 36, lower hook portions 38 that are detachably engaged with the lower pins 66 of the agricultural working machine 30 are provided.

  Further, a support portion 40 composed of a pair of left and right support plates 39 that are spaced apart from each other is provided at the center in the left-right direction at the lower portion of the frame portion 36, and the input shaft connecting portion of the joint 32 is provided by this support portion 40. 33 is supported.

  Further, on both the left and right sides of the frame portion 36, there is a locked state that restricts the lower pin 66 from coming out of the recessed portion 38a of the lower hook portion 38 and the lower pin 66 coming out of the recessed portion 38a of the lower hook portion 38. A pin lock 41 that is allowed to be unlocked is rotatably provided. The pin lock 41 is selectively switched between a locked state and an unlocked state by operating the operation lever 42.

  The quick coupler 31 includes a top link mounting portion 43 on which the top link 24 of the tractor 21 is detachably mounted, and a lower link mounting portion 44 on which the lower link 25 of the tractor 21 is detachably mounted. Yes.

  The joint 32 is a shaft-shaped power transmission means that can expand and contract in the axial direction, as shown in FIGS. The shaft-shaped joint 32 includes a short columnar input shaft connecting portion 33 at a rear end portion which is one end portion in the axial direction.

  The input shaft connecting portion 33 includes a cylindrical tubular member 46 whose both end faces are open, a pair of left and right shaft mounting members 47 fixed to the outer peripheral side of the tubular member 46, and the respective shafts. A left and right shaft member 48 attached to the attachment member 47 and supported by the support plate 39 of the quick coupler 31, and a rotation member provided rotatably on the inner peripheral side of the cylindrical member 46 via a bearing 49. And an input shaft connecting member 50.

  The input shaft connection member 50 includes a drive-type agricultural work machine that requires power from the PTO shaft 26 side of the tractor 21, that is, a spline shaft-like input shaft included in, for example, the rotary work machine 1 shown in FIG. A spline hole-like connection hole (input shaft connection hole) 51 into which 10 is removably inserted and connected is formed. That is, the input shaft connecting portion 33 is formed with a concave connection hole 51 that opens rearward.

  The agricultural machine 30 shown in FIG. 1 and the like is a non-drive type that does not require power from the PTO shaft 26 side of the tractor 21, and is connected to the connection hole portion (input shaft fitting hole) of the input shaft connection member 50. Part) 51 does not have an input shaft that can be connected.

  Further, the joint 32 includes a PTO shaft connecting portion 52 at the front end which is the other end in the axial direction. The PTO shaft connecting portion 52 is constituted by a shaft connecting member 53, and the PTO shaft 26 of the tractor 21 is releasably connected to the shaft connecting member 53. The shaft connection member 53 is connected to the input shaft connection member 50 via a transmission shaft portion 55 that is extendable and bendable, which includes an inner shaft and an outer shaft. That is, the PTO shaft connection portion 52 is provided at the front end portion of the transmission shaft portion 55, and the input shaft connection portion 33 is provided at the rear end portion of the transmission shaft portion 55. Further, the outer peripheral surface of the transmission shaft portion 55 is covered with a cylindrical safety cover 56. The weight of the joint 32 is about 20 kg, for example.

  As shown in FIGS. 1 to 3 and the like, the agricultural machine 30 is connected to a quick coupler 31 that is attached to a three-point link hitch portion 23 of a tractor 21 and supports an input shaft connecting portion 33 of a joint 32. Machine. Then, the farm work machine 30 performs a plowing work, for example, a farm work while moving the farm field forward (traveling direction) by the forward traveling of the tractor 21 while being connected to the tractor 21 via the quick coupler 31.

  The farm work machine 30 includes a machine body 62 having a three-point connecting portion 61 that can be connected to the quick coupler 31 and can be released from the connection.

  The three-point connecting portion 61 includes an upper support plate portion 63, an upper pin 64 attached to the upper support plate portion 63 and detachably engaged with the upper hook portion 37 of the quick coupler 31, and left and right lower support plate portions. 65, and a lower pin 66 attached to each lower support plate portion 65 and detachably engaged with the lower hook portion 38 of the quick coupler 31.

  The upper support plate portion 63 includes support plates 63a and 63a that are spaced apart from each other, and an upper pin 64 is installed on both the support plates 63a and 63a. Further, the upper support plate portion 63 is attached to the front end portion of the attachment arm portion 67 that is longitudinal in the front-rear direction. The rear end portion of the attachment arm portion 67 is attached to the substantially central portion in the left-right direction of the rear frame portion 72 of the airframe 62.

  The lower support plate portion 65 includes an inner support plate 65a and an outer support plate 65b that are spaced apart from each other, and a lower pin 66 is installed in front of these support plates 65a and 65b.

  The inner support plate 65a is slightly longitudinal in the front-rear direction, and the lower end portion of the connection arm portion 68 is attached to the substantially central portion in the longitudinal direction (intermediate portion in the longitudinal direction). The upper end portion of the connecting arm portion 68 is attached to the front end portion of the attachment arm portion 67. A circular hole 69 is formed in the rear portion of the inner support plate 65a so as to penetrate the inner support plate 65a.

  The outer support plate 65b has a slightly longitudinal shape in the front-rear direction, and the longitudinal direction of the tubular pipe member (hitch pipe) 70 that is longitudinal in the left-right direction on the inner surface of the substantially central portion in the longitudinal direction (intermediate portion in the longitudinal direction). The end is fixedly attached by welding or the like.

  That is, the pipe member 70 is installed on the outer support plate 65b, which is the left and right pin support plates, in a state of being fitted and inserted into the hole 69 of the inner support plate 65a. The pipe member 70 is, for example, a round pipe having a circular cross section. The rear end portion of the outer support plate 65b that supports the lower pin 66 at the front end portion is attached to the front end portion of the main body frame portion 60 that is longitudinal in the front-rear direction.

  In this way, one pipe member 70 is fixedly attached to the three-point connecting portion 61 of the airframe 62, and the three-point connecting portion 61 is reinforced by the attached pipe member 70 so as to have a desired strength. The three-point connecting portion 61 of the airframe 62 includes an upper support plate portion 63, an upper pin 64, a lower support plate portion 65, a lower pin 66, an attachment arm portion 67, and a connection arm portion 68.

  On the other hand, the airframe 62 has a front frame portion (front frame pipe) 71 and a rear frame portion (rear frame pipe) 72 formed in a longitudinal shape in the left-right direction, respectively. The portion 60 is fixed so as to be opposed to each other in the front-rear direction.

  In the front frame portion 71 on the front side, a plurality of (for example, two) front work bodies 73 that perform farming work (rough work) are arranged in parallel in the left-right direction. ing. Similarly, a plurality of (for example, three) rear work bodies 74 that perform a tilling work (roughing work) that is a farm work are arranged in parallel on the rear frame 72 on the rear side at intervals in the left-right direction. .

  The pre-working body 73 cuts and lifts the soil in the field and reverses it while moving forward while being inserted into the soil in the field at a predetermined depth.

  The front working body 73 has a support arm 76 that has an upper end that is attached to the front frame 71 and that is curved in the vertical direction. At the lower end of the support arm 76, a plate-shaped chisel 77 for cutting and lifting soil in the field is provided. Below the support arm 76 is provided a plate-like reversing plate 78 that lifts the soil from the chisel 77 and the soil that has been cut by itself up to the upper side of the field and reverses it. In addition, a plate-like wing 79 for cutting soil in the field is provided at the lower end of the support arm 76.

  The post-work body 74 cuts and lifts the soil in the field and reverses it while moving forward while being inserted into the soil in the field at a predetermined depth.

  The rear work body 74 has a support arm 81 that is curved in the vertical direction and has an upper end attached to the rear frame portion 72. At the lower end of the support arm 81, a plate-shaped chisel 82 for cutting and lifting soil in the field is provided. Below the support arm 81, there is provided a plate-like reversing plate 83 that lifts the soil from the chisel 82 and the soil that has been cut by itself up to the upper side of the field and reverses it. In addition, a plate-like wing 84 for cutting the soil in the field is provided at the lower end of the support arm 81.

  As is apparent from FIG. 2, a plurality of, for example, five reversing plates 78 and 83 are positioned side by side in the left-right direction when viewed from the front. It has a shape that is twisted so as to flip the soil inward.

  In addition, on the rear end portion of the machine body 62, a pressure-reducing wheel 85 that performs a pressure-reducing operation while rotating with the force received from the field is provided behind the plurality of rear work bodies 74 in a rotatable manner. The pressure-reducing wheel 85 has a plurality of support plates 86 arranged at intervals in the left-right direction, and a plurality of pressure-reducing rods 87 that are longitudinally supported by the plurality of support plates 86.

  On the other hand, as shown in FIGS. 1 to 4, the agricultural machine 30 is provided at the three-point connecting portion 61 of the machine body 62 so as to cover the input shaft connecting portion 33 of the joint 32, and the three-point connecting portion of the machine body 62. In addition to reinforcing 61, the soil from the front work body 73 side (the soil jumped up by the front work body 73) is prevented from heading toward the input shaft connecting portion 33 side of the joint 32 during the farming work. Reinforcing / preventing means 91 is provided.

  The reinforcing / preventing means 91 is attached to, for example, the three-point connecting portion 61 of the airframe 62 to reinforce the three-point connecting portion 61, and the pins 64 and 66 of the three-point connecting portion 61 are hook portions 37 of the quick coupler 31. , 38, it is composed of only one reinforcing and preventing member 92 that covers the connection hole 51 of the input shaft connecting portion 33 of the joint 32 supported by the support portion 40 of the quick coupler 31. That is, the reinforcing / preventing means 91 is composed of a reinforcing / preventing member 92 comprising a single pipe member 70 formed in a cylindrical shape (for example, a cylindrical shape) having a longitudinal direction in the left-right direction. .

  The reinforcing / preventing member 92 is in a state where the three-point connecting portion 61 of the machine body 62 is connected to the quick coupler 31 so that dirt does not enter the connecting hole portion 51 of the input shaft connecting portion 33 of the joint 32. Sometimes it is located in the vicinity of the rear of the input shaft connecting portion 33 of the joint 32 in close proximity to the connecting hole 51 (see FIG. 4).

  Here, the reinforcing and preventing member 92 made of the pipe member 70 is to prevent the soil from the front work body 73 side from scattering toward the input shaft connecting portion 33 side during work, for example, in the longitudinal direction in the left-right direction. The both ends in the left-right direction are fixed to the outer support plate 65b.

  The outer diameter size of the reinforcing / preventing member 92 is smaller than the outer diameter size of the front frame portion 71, but larger than the opening diameter size of the connection hole portion 51 of the joint 32. The length in the left-right direction of the reinforcing / preventing member 92 is the same (including substantially the same) as the length in the left-right direction of the front frame portion 71.

  As is apparent from FIG. 4, when the three-point connecting portion 61 of the airframe 62 is connected to the quick coupler 31, the left and right central portion of the reinforcing and preventing member 92 is supported by the quick coupler 31. It is located near the rear of the connection hole 51 of the connection portion 33.

  Therefore, during work, the soil from the front work body 73 side toward the input shaft connection portion 33 side hits the reinforcement / prevention member 92 and does not scatter (move) to the input shaft connection portion 33 side of the joint 32. The soil does not enter the connection hole 51 of the connection portion 33.

  Next, the operation and the like of the farm work machine 30 will be described.

  First, when the agricultural machine 30 is connected to the three-point link hitch portion 23 of the tractor 21 via the quick coupler 31, the tractor 21 is brought close to the agricultural machine 30 by back running, and then the three-point link hitch portion 23 is moved. When lifted by the hydraulic device, the three pins 64 and 66 of the three-point connecting portion 61 of the agricultural machine 30 are engaged and connected to the three hook portions 37 and 38 of the quick coupler 31 and the input shaft connecting portion of the joint 32 The rear portion of 33 is covered with a reinforcing / preventing member (pipe member) 92. That is, the connecting hole 51 of the input shaft connecting portion 33 of the joint 32 is covered with the reinforcing / preventing member 92 that is in close proximity to the connecting hole 51.

  When working with the agricultural machine 30, when the agricultural machine 30 is moved forward by a relatively high-speed forward traveling of the tractor 21 in the field, the working bodies 73 and 74 perform tilling work, and the pressure is reduced behind them. Wheel 85 performs the suppression work.

  At this time, a part of the soil that has been reversed and scattered by the front work body 73 tries to move toward the input shaft connecting portion 33 side of the joint 32. The flying direction is changed by hitting the pipe member 70 which is the reinforcement / prevention member 92 which also serves as reinforcement.

  As a result, the soil from the front work body 73 side does not enter the connection hole 51 of the input shaft connection part 33 of the joint 32 and does not adhere to the connection hole 51. For this reason, for example, when the rotary work machine 1 is used after the work by the agricultural work machine 30, the input shaft 10 of the rotary work machine 1 is moved to the connection hole 51 without cleaning the inside of the connection hole 51. It can be inserted.

  And according to such a farm work machine 30, since the machine body 62 is reinforced, the reinforcing and preventing means 91 for preventing the soil from the front work body 73 side from moving toward the input shaft connecting portion 33 side of the joint 32 is provided. Not only can the machine body 62 be reinforced, but the soil from the front work body 73 side does not hit the input shaft connecting portion 33 and prevents the soil from entering and adhering to the connecting hole 51 of the input shaft connecting portion 33. it can. Therefore, it is not necessary for the operator to remove the heavy joint 32, and it is not necessary to remove the adhered soil in the connection hole 51 when connecting the drive type farm working machine, so that the burden on the operator can be reduced.

  The reinforcing / preventing means 91 is attached to the three-point connecting portion 61 of the airframe 62 to reinforce the three-point connecting portion 61, and the joint 32 when the three-point connecting portion 61 is connected to the quick coupler 31. Since the cylindrical reinforcing / preventing member 92 covers the input shaft connecting portion 33, the three-point connecting portion 61 can be sufficiently reinforced by the reinforcing / preventing member 92. Thus, it is possible to appropriately prevent the soil from coming to the input shaft connecting portion 33 side and appropriately prevent the soil from entering and adhering to the connection hole 51 of the input shaft connecting portion 33.

  In addition, the reinforcement and prevention member (soil-prevention member that also serves as reinforcement) 92 of the agricultural machine 30 is not limited to a cylindrical shape (round pipe) having a longitudinal direction in the left-right direction. For example, as shown in FIG. 6, a rectangular tube having a longitudinal direction in the left-right direction (square pipe) may be used.

  Further, the reinforcing / preventing member 92 is not limited to one made of a pipe member 70 such as a single round pipe or square pipe, but may be made of, for example, a plurality of pipe members, and also has a solid shaft shape. It may be a member or a plate member.

  Further, for example, a configuration in which the reinforcing / preventing member 92 is detachably provided on the three-point connecting portion 61 of the fuselage 62, or a reinforcing / preventing member 92 is provided on the three-point connecting portion 61 of the fuselage 62 so that the upper position can be adjusted. A configuration or the like may be used.

  Further, the pre-work body 73 that is the work body of the agricultural machine 30 may have a reversing plate that is twisted so as to release the cutting soil to the left or right side. 73 may be provided at the center in the left-right direction of the front frame portion 71.

  Further, the working body is not limited to the pre-working body 73 that performs soil work, and any type of work body may be used as long as the soil is blown toward the input shaft connecting portion 33 side of the joint 32. A subsoiler that performs soil crushing work may be used.

21 Tractor as a traveling vehicle
23 3-point link hitch
30 Farm machine
31 Quick coupler
32 joints
33 Input shaft connection
51 Connection hole
61 Three-point connecting part
62 Aircraft
65b Pin support plate outer support plate
66 bottom pin
73 Previous work body, which is a work body
91 Strengthening and prevention measures
92 Reinforcement and prevention member

Claims (5)

An agricultural machine that can be connected to a quick coupler that is mounted on a three-point link hitch of a traveling vehicle and supports an input shaft connection of a power transmission joint,
An airframe having a three-point connecting portion connectable to the quick coupler;
A work body provided on this machine body for farm work,
In a longitudinal shape having a longitudinal direction in the left-right direction, the machine body is reinforced, and includes reinforcing and preventing means for preventing soil from the working body side from moving toward the input shaft connecting portion side ,
The reinforcing / preventing means is located near the rear of the input shaft connecting portion of the joint and is connected to the input shaft connecting portion when the three-point connecting portion of the airframe is connected to the quick coupler. An agricultural machine characterized by covering a hole . The reinforcing and preventing means is located above and behind the lower pin of the three-point connecting portion of the fuselage in a side view.
The agricultural machine according to claim 1. The three-point connecting part of the fuselage has left and right pin support plates that support the lower pin,
The reinforcing and preventing means is installed on the left and right pin support plates.
The agricultural machine according to claim 2, wherein: The left and right pin support plates have a longitudinal shape having a longitudinal direction in the front-rear direction inclined to the front downward in a side view,
The lower pin is attached to the front end of the pin support plate,
The reinforcing / preventing means is attached to the intermediate portion in the longitudinal direction of the pin support plate.
The agricultural machine according to claim 3. The reinforcing / preventing means is composed of one longitudinal reinforcing / preventing member having a longitudinal direction in the left-right direction.
The agricultural working machine according to any one of claims 1 to 4, wherein

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