JP5872156B2 - Agricultural machine - Google Patents

Description

  The present invention relates to an agricultural machine, and more particularly, to an agricultural machine that is provided with a means for obtaining a part of rotational power from a tractor to increase the speed and is attached to the tractor to perform an agricultural work.

  Conventionally, a farm work machine mounted on a tractor has an actuator or the like to handle various farm work. There are many actuators that move by electricity, and the power source at this time was connected from the tractor side via a harness (wiring) using the battery of the tractor.

  On the other hand, FIG. 6 is an enlarged view showing an example of the vicinity of the input shaft in a conventional agricultural machine. In FIG. 6, the lower side is the front side and is attached to the tractor. The power from the tractor side is received and rotated by the input shaft 101, and the power is transmitted to the first bevel gear 102, the second bevel gear 104, and the drive shaft 106 connected to the input shaft 101, and the power necessary for farm work is obtained. Become. The bevel case 111 holds the input shaft 101 with the front boss portion 111 a via bearings 121 and 122. Further, the second bevel gear 104 is held by the rear bevel holding portion 111 b via the bearing 123. The bevel case 111 has a flange portion 111d having a plurality of holes 111c on the outer periphery, and a bolt or the like is passed from the outside to be fixed to an attachment portion 114a (internal thread portion) opened in front of the transmission case 114. At this time, the bevel gears 102 and 104 are disposed in the mission case 114. A fixing member 112 is attached in front of the bevel case 111. Further, hitch arm mounting plates 117 and 118 fixed to the frame pipes 115 and 116 are provided on both sides of the mission case 114.

  On the other hand, Patent Document 1 describes a rotary tiller having an output shaft protruding from the rear of a gear case. Furthermore, Patent Document 2 describes an agricultural machine that operates a hydraulic pump provided inside a transmission case through a single spur gear from an input shaft.

JP 2003-210002 A Japanese Patent Laid-Open No. 10-14301

  However, in the conventional system using the battery of the tractor as a power source, a wiring connecting the tractor and the farm work machine is necessary, and it is necessary to remove the wiring every time the farm work machine is changed according to the farm work. Furthermore, if the agricultural machine was removed from the tractor with the wires connected, there was a risk of disconnection.

  Further, the invention described in Patent Document 1 needs to have a space behind the gear case. Further, compared with the conventional example shown in FIG. 6, it is necessary to replace all the mechanisms around the input shaft, and the weight balance is also increased. Deteriorate. The invention described in Patent Document 2 is a configuration in which a hydraulic pump inside a transmission case is operated via a single spur gear, and can be applied only to a predetermined hydraulic pump, and the speed increasing ratio is limited. Furthermore, as compared with the conventional example, it is necessary to replace all the mechanisms around the input shaft.

  In view of the above-mentioned problems, the present invention provides a means for obtaining a part of rotational power from a tractor to increase the rotation speed, and is mounted on a tractor that is compact and excellent in weight balance and can increase the speed increase ratio. It is an object of the present invention to provide an agricultural machine that performs agricultural work.

In order to achieve the above object, an agricultural machine according to the present invention is an agricultural machine that is attached to a tractor and performs an agricultural work. An input shaft that receives rotational power from the tractor and transmits it to a transmission case, and an intermediate part of the input shaft. A first speed increasing means for obtaining a part of power from the transmission section and increasing the rotation, and a second speed increasing means for further increasing the speed increased by the first speed increasing means, And an output device that receives rotation increased by the second speed increasing means, the first speed increasing means is provided in front of the transmission case, and the second speed increasing means is the first speed increasing means. The speed increasing means is provided on the front side, and the output device is provided on the rear side of the second speed increasing means .

Furthermore, in the agricultural machine according to the present invention, the first speed increasing means, the second speed increasing means, and the output device are provided between two hitch arm mounting plates provided on both sides of the transmission case. It is characterized by being.
Further, in the agricultural machine according to the present invention, the first speed increasing means is a first spur gear attached to the input shaft and rotating together with the input shaft, and a second spur gear meshing with the first spur gear. It is characterized by comprising spur gears.
Furthermore, the agricultural working machine of the present invention is characterized in that a center distance between the first spur gear and the second spur gear is 100 to 200 mm.
Furthermore, the agricultural machine of the present invention is characterized in that the first spur gear has a diameter of 250 mm or less.
Furthermore, the agricultural machine according to the present invention is characterized in that the first speed increasing means is provided inside a gear case that is fixed in front of the transmission case and holds the input shaft.

Furthermore, the agricultural machine of the present invention is characterized in that the second speed increasing means is constituted by two pulleys and a belt.
Furthermore, the agricultural machine of the present invention is characterized in that one of the pulleys is fixed to a transmission shaft to which the second spur gear is attached .

  According to the present invention, in a farm machine that is attached to a tractor and performs farm work, the means for obtaining a part of the rotational power from the tractor and increasing the rotation speed is compact, excellent in weight balance, and has a speed increase ratio. Can be high.

It is a plane cross-sectional enlarged view of the input shaft vicinity which shows one Embodiment in the agricultural machine of this invention. It is a front enlarged view of the input shaft vicinity which shows one Embodiment in the agricultural machine of this invention. It is an enlarged front view which shows the example of attachment of the input shaft vicinity in the agricultural working machine of this invention. It is a whole block diagram which shows the structural example containing the agricultural working machine and tractor of this invention. It is a front view which shows an example of the agricultural machine of this invention. It is an enlarged view of the input shaft vicinity which shows an example in the conventional agricultural machine.

  A mode for carrying out the present invention will be described.

  FIG. 1 is an enlarged plan sectional view of the vicinity of an input shaft showing an embodiment of the agricultural machine according to the present invention, and FIG. 2 is an enlarged front view. In FIG. 1, in order to make the mechanism easy to understand, the position of the power generation device 20 that is an output device is shifted outward. The same parts as those in the conventional example of FIG. 6 are denoted by the same reference numerals.

  In FIG. 1, the lower side is the front side (tractor side) and is attached to the rear part of the tractor. The tractor is mounted by attaching a hitch arm (member for connecting to the tractor) to the hitch arm mounting plates 117 and 118 fixed to the frame pipes 115 and 116 on both sides of the transmission case 114, for example. It is attached to the connecting device etc.

  The input shaft 11 has a receiving portion 11a on the front side, and has a transmission portion 11b composed of a spline, a keyway, or the like in the middle. Further, a first bevel gear 102 is integrally formed at the rear end. The receiving portion 11a can be attached with a joint (including a universal joint) and the like, and the rotational power from the tractor is transmitted to the receiving portion 11a. The input shaft 11 is rotatably held by the gear case 30 via the first bearing 21 and the second bearing 22.

  The first gear 13 has a cylindrical portion 13a at the center, and the outer periphery thereof is a gear portion 13b made of a spur gear. A cylindrical portion 13a of the first gear 13 is inserted into the transmission portion 11b of the input shaft 11, and the first gear 13 is attached so as to be concentric with the input shaft 11 and rotate together. The inner periphery of the cylindrical portion 13a is configured by a spline. Both sides of the cylindrical portion 13a are in contact with the first bearing 21 and the second bearing 22, and the gear portion 13b is formed behind the cylindrical portion 13a.

  The transmission shaft 16 is attached so that the second gear 15, which is a spur gear, rotates concentrically with the transmission shaft 16 in the middle. The second gear 15 is a spur gear that meshes with the first gear 13 and has a smaller number of teeth and a smaller diameter than the first gear 13. The transmission shaft 16 is rotatably held by the gear case 30 via a third bearing 23 and a fourth bearing 24 disposed on both sides of the second gear 15. A first pulley 17 is fixed to the front end of the transmission shaft 16.

  The first gear 13 and the second gear 15 serve as the first speed increasing means. Here, the center distance between the first gear 13 and the second gear 15 can be set to 100 mm to 200 mm, for example, and the diameter of the first gear 13 can be set to 250 mm or less. In this embodiment, the speed is increased by a factor of 2 or more by the first speed increasing means.

  The power generation device 20 that is an output device is a device that has a second pulley 19 attached to a shaft portion 20a and generates power based on the power of the second pulley 19 when the second pulley 19 rotates. A belt 18 is stretched between the first pulley 17 and the second pulley 19 to transmit power. The diameter of the first pulley 17 is larger than the diameter of the second pulley 19 and includes the belt 18 as a second speed increasing means. Examples of the power generation device 20 include an alternator and a dynamo. In particular, the alternator has a large amount of power generation, has a rectification function and a charge control function, and can be directly connected to a power storage device 44 described later. The position of the power generation device 20 is behind the second pulley 19, and is attached to the upper side of the frame pipe 115 while avoiding the frame pipe 115. For this reason, the position of the second pulley 19 is disposed above the position of the first pulley 17. As the second speed increasing means, if the pulley used in the general-purpose alternator is used, the cost can be reduced. However, the second speed increasing means can be constituted by a chain (and sprocket) or a gear. Further, the output device can be applied to other output devices such as a pump in addition to the power generation device 20.

  The gear case 30 has an input shaft holding portion 30a that holds the input shaft 11 in front of the transmission case 114, and a transmission shaft holding portion 30b that holds the transmission shaft 16 is located on the side of the input shaft holding portion 30a. May have). The transmission shaft holding portion 30b is thinner than the input shaft holding portion 30a, and the front end is located behind the input shaft holding portion 30a. The pulley 17 as the second speed increasing means, 19 spaces are secured. Further, a bevel holding portion 30c is provided on the rear side, and this shape is basically the same as the bevel holding portion 111b of the conventional example of FIG. The second bevel gear 104 is attached to the bevel holding portion 30 c via the third bearing 123.

  The gear case 30 can be divided into a gear case rear member 31 and a gear case front member 32 in consideration of assembly. The gear case rear member 31 has, for example, an attachment portion for attaching the second bearing 22 and the fourth bearing 24 on the rear side, and the gear case front member 32 attaches the first bearing 21 and the third bearing 23 on the front side. It can have an attachment. Furthermore, the gear case rear member 31 also has a bevel holding portion 30c.

  The base 35 is attached to the front side of the transmission shaft holding portion 30 b of the gear case 30 and supports the first pulley 17, the second pulley 19, and the power generator 20. Further, the pulley case 36 is attached to the base 35 and covers the front side and side surfaces of the first pulley 17 and the second pulley 19. The base 35 has an adjustment groove 35a.

  The power generation device 20 is fixed behind the base 35 with a bolt 37 and an adjustment bolt 38. The bolt 37 and the adjustment bolt 38 are located on both sides of the power generation device 20. The adjusting bolt 38 can be shifted and positioned along the adjusting groove 35a to be fixed. Thereby, the tension of the belt 18 can be adjusted. The power generation device 20 is provided outside and is easily maintained.

  Next, the operation will be described.

  Power from a PTO (Power Take Off) of the tractor is transmitted to the input shaft 11 through a joint (including a universal joint) or the like, and the input shaft 11 rotates. Then, the first bevel gear 102 fixed to the rear end of the input shaft 11 also rotates, meshes with the second bevel gear 104, and power is transmitted to the drive shaft 106. The drive shaft 106 and later are used for power necessary for farm work.

  On the other hand, the first gear 13 attached to the input shaft 11 also rotates together with the input shaft 11 and meshes with the second gear 15 to transmit a part of the motive power (for example, about 1 horsepower) to increase the speed. Furthermore, the transmission shaft 16 to which the second gear 15 is attached rotates together, and the first pulley 17 fixed to the front tip also rotates. The rotational power of the first pulley 17 is further increased through the belt 18 and transmitted to the second pulley 19. Since the second pulley 19 is attached to the shaft portion 20a of the power generation device 20, the power generation device 20 generates power based on the transmitted power.

  Thus, the speed is increased by the first speed increasing means of the first gear 13 and the second gear 15 and the second speed increasing means of the first pulley 17 and the second pulley 19. The rated rotation speed from the tractor PTO is normally 540 rpm (revolution per minute). A generator such as an alternator preferably has a rotational speed of 2000 rpm or higher, and needs to rotate at least 1500 rpm. Therefore, the speed increasing rate from the rotational speed (rated 540 rpm) input to the input shaft 11 from the tractor PTO to the rotation of the second pulley 19 of the power generator 20 is required to be three times or more. In the present invention, the speed is surely increased by the two-stage speed increasing means.

  FIG. 3 is an enlarged front view showing an example of attachment near the input shaft in the agricultural machine according to the present invention. In the figure, components are attached and completed as they go from (a) to (d).

  First, as shown in FIG. 3A, the gear case rear member 31 is attached to the mission case 114. The bottom portion of the gear case rear member 31 has a plurality of bottom mounting holes 31a. Bolts are inserted into these holes and fixed to the female screw portions of the mounting portions 114a of the mission case 114 by fastening them. The bottom mounting hole 31a is located inside the side wall portion 31b. As a result, the mounting portion 114a of the transmission case 114 remains the same, and a space for providing the gears 13 and 15 in the gear case 30 can be secured. At this time, the second bevel gear 104 is set in advance in the bevel holding portion 30c.

  Further, the gear case front member 32 is attached to the gear case rear member 31 as shown in FIG. For attachment, the end portions of the side wall portions 31b and 32a are aligned, bolts are inserted from the side attachment holes 32b of the gear case front member 32, and screwed into the side female screw portions 31c of the gear case rear member 31. Fix it. At this time, the input shaft 11 having the first bevel gear 102, the transmission shaft 16, the gears 13 and 15, and the bearings 21, 22, 23, and 24 are set therein.

  Further, as shown in FIG. 3 (c), after the base 35 is attached to the gear case front member 32 and the pulleys 17 and 19 and the belt 18 are set, the pulley case is attached to the base 35 as shown in FIG. 3 (d). 36 is attached.

  With these configurations, the configuration of the mission case 114 remains the same as the conventional example, and the speed increasing means can be attached. Furthermore, the speed increase means can be made compact by using two stages. Furthermore, it can be installed on the front side by taking the power of the speed increasing means from the input shaft 11, and the weight balance with the tractor is good.

  Furthermore, with these configurations, the distance A between the front end portion of the mounting portion 114a of the transmission case 114 of the conventional example and the front end portion of the fixing member 112 and the gear case 30 from the front end portion of the mounting portion 114a of the mission case 114 of the present invention. The distance A ′ between the front end portions can be made substantially the same. Further, since the front end portion of the pulley case 36 does not protrude ahead of the front end portion of the gear case 30 (B), there is no interference with the joint and the cover of the input shaft. Further, the power generation device 20 is positioned on one side of the mission case 114, and further disposed on the inner side of the conventional hitch arm mounting plates 117 and 118, it is possible to avoid interference with other members. By these, attachment of a hitch arm (member for connecting with a tractor) etc. can be made as usual, and common parts can be achieved.

  FIG. 4 is an overall configuration diagram showing a configuration example including the agricultural machine and the tractor according to the present invention. A farm work machine 2 is attached to the rear of the tractor 1, and power from the tractor 1 is transmitted to the input shaft 11 via the joint 4. The farm work machine 2 includes an input shaft 11, a power generation device 20, a wireless transmission / reception unit 42, a control box (control unit) 43, a power storage device 44, and an actuator 45, and a part of the rotational power of the input shaft 11 increases. The power is generated by the power generation device 20 and stored in the power storage device 44. The power storage device 44 is, for example, a 12V battery. On the other hand, the power storage device 44 and the control box 43 are connected, and the control box 43 is also connected to the wireless transmission / reception unit 42 and the actuator 45. On the other hand, an operation unit 41 can be arranged on the tractor 1 side.

  The operation unit 41 has an operation switch and a wireless transmission / reception function, and the operator remotely operates the operation unit 41 from the driver seat of the tractor 1, for example. Then, the operation signal is transmitted wirelessly to the wireless transmission / reception unit 42 on the farm work machine 2 side. Based on the operation signal, the control box 43 controls the actuator 45. At this time, the electric power required on the agricultural machine 2 side is supplied using the power storage device 44 as a power source. In addition, necessary information may be transmitted from the control box 43 to the operation unit 41 via the wireless transmission / reception unit 42 and may be displayed by providing a display unit on the operation unit 41.

  By configuring the wireless operation and power generation system in this way, no wiring between the tractor 1 and the agricultural machine 2 is required, and the operator can smoothly replace the agricultural machine 2. The risk of disconnection can be eliminated.

  FIG. 5 is a front view showing an example of the agricultural machine according to the present invention. The agricultural machine 2 in FIG. 5 is a scraper provided with a folding mechanism, and the input shaft 11 side is attached to the tractor 1, and the scraping claw rotates in the cover 52 by obtaining power from the input shaft 11. Do work.

  When the cylinder expands and contracts, the electro-hydraulic cylinder 56 can cause the rotating mechanism 57 to act and fold the side working portion 55 upward (as shown on the left side in FIG. 5) to shorten the entire width of the scraper. The extension rake opening / closing device 60 can select whether to use the extension rake 61 by rotating the extension rake 61 left and right via the control bar 62 and the wire 63 as the internal motor rotates. . The earthing unit 66 can adjust the earthing by controlling the vertical movement of the rear rake through the earthing part 67 by the rotation of an internal motor.

  The electric hydraulic cylinder 56, the extended rake opening / closing device 60 (motor), and the earthing unit 66 (motor) can be operated as the actuator 45, so that efficient farm work can be performed.

  FIG. 5 shows an example of one type of farm work machine. However, the present invention is not limited to this, and the present invention is not limited to this. The farm machine has an input shaft that is attached to a tractor and receives power from the tractor, and includes an electrically operated actuator. The invention can be applied.

DESCRIPTION OF SYMBOLS 11, 101 Input shaft 13 1st gear 15 2nd gear 16 Transmission shaft 17 1st pulley 18 Belt 19 2nd pulley 20 The power generator 30 which is an output device Gear case 35 Base 36 Pulley case 41 Operation part 42 Wireless transmission / reception part 43 Control Box 44 Power storage device 45 Actuator 56 Electrohydraulic cylinder 60 Extended rake opening / closing device 66 Earthing unit 102 First bevel gear 104 Second bevel gear 111 Bevel case 114 Mission case 117, 118 Hitch arm mounting plate

Claims (8)

Agricultural work machines that are attached to tractors and perform farm work.
An input shaft for transmitting in the transmission case by receiving the rotational power from the tractor, a first speed increasing means for increasing the rotation speed to obtain a part of the power from the transmission section having the middle of the input shaft, the A second speed increasing means for further increasing the speed increased by the first speed increasing means, and an output device for receiving the speed increased by the second speed increasing means,
The first speed increasing means is provided in front of the transmission case, the second speed increasing means is provided in front of the first speed increasing means , and the output device is provided with the second speed increasing means. An agricultural machine characterized by being provided on the rear side of the means . The agricultural machine according to claim 1,
The farm work machine, wherein the first speed increasing means, the second speed increasing means, and the output device are provided between two hitch arm mounting plates provided on both sides of the transmission case. . In the agricultural machine according to claim 1 or 2,
The first speed increasing means is constituted by a first spur gear attached to the input shaft and rotating together with the input shaft, and a second spur gear meshing with the first spur gear. Agricultural working machine characterized. In the agricultural machine according to claim 3,
The agricultural machine according to claim 1, wherein a center distance between the first spur gear and the second spur gear is 100 to 200 mm. In the agricultural machine according to claim 3,
The farm machine according to claim 1, wherein the first spur gear has a diameter of 250 mm or less. In the agricultural machine according to any one of claims 1 to 5,
The agricultural machine according to claim 1, wherein the first speed increasing means is provided inside a gear case that is fixed in front of the transmission case and holds the input shaft. In the agricultural machine according to any one of claims 1 to 6,
The second speed increasing means is constituted by two pulleys and a belt. The agricultural machine according to claim 7,
One of the pulleys is fixed to a transmission shaft to which the second spur gear is attached.

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