JP2012161256A - Agricultural working implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agricultural working implement for performing agricultural work by being installed in a tractor provided with a unit for increasing speed by obtaining part of rotational power from the tractor and having a structure in which the speed increasing unit can be easily installed.SOLUTION: The agricultural working implement for performing agricultural work by being installed in a tractor includes: an extension input shaft 11 for receiving rotational power from the tractor; a coupling 12 fixed at one end of the extension input shaft 11; an input shaft 101 connected to the coupling 12 and transmitting the rotational power from the extension input shaft 11 into a mission case 114; and speed increasing units 13 and 15 for increasing the speed of the rotation by obtaining part of the rotational power of the extension input shaft 11, and outputting the rotation with the increased speed.

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, 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, and further, when applying this invention, it is necessary to renew all the mechanisms around the input shaft such as the gear case. Further, in the case of the rear of the gear case, the weight balance also deteriorates. 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. Even when this invention is applied, it is necessary to newly design all the mechanisms around the input shaft.

  In view of the above problems, the present invention provides a means for obtaining a part of rotational power from a tractor to increase the speed, and has a structure in which the speed increasing means can be easily attached. The purpose is to provide.

  In order to achieve the above object, a farm work machine according to the present invention is fixed to the extension input shaft that receives rotational power from the tractor and the other end of the extension input shaft in a farm work machine that is attached to a tractor for farm work. A coupling, an input shaft connected to the coupling and transmitting the rotational power from the extended input shaft to the transmission case, and a part of the rotational power of the extended input shaft are obtained and the rotational speed is increased and output. And a speed increasing means.

Further, the agricultural machine according to the present invention is characterized in that the speed increasing means is composed of two stages of a first speed increasing means and a second speed increasing means.
Furthermore, the agricultural machine of the present invention is characterized in that the position of the hitch arm for connecting the agricultural machine to the tractor is extended by an amount corresponding to the length extended by the extension input shaft.
Furthermore, the agricultural machine of the present invention has an output device that receives the rotation increased by the speed increasing means, and the output device is a power generator.
Furthermore, the agricultural machine of the present invention has an output device that receives the rotation increased by the speed increasing means, and the output device is a car wash pump.

  Further, the agricultural machine of the present invention includes an input shaft that receives the rotational power from the tractor and transmits it to the transmission case, a transmission means that is fitted into the input shaft and rotates coaxially, and the input shaft is more powerful than the transmission means. A joint that fixes the connecting portion at the tip and transmits the power from the tractor; and a speed increasing means that uses the power transmission means to obtain a part of the rotational power of the input shaft and accelerates and outputs the rotation. It is characterized by having.

  According to the present invention, a farm work machine that is attached to a tractor and performs farm work has a structure in which a means for obtaining a part of rotational power from the tractor and increasing the speed is easily attached.

It is a plane cross-sectional enlarged view of the input shaft vicinity of 1st Embodiment of the agricultural machine of this invention. It is a front enlarged view of the input shaft vicinity of 1st Embodiment of the agricultural working machine of this invention. It is a plane cross-sectional enlarged view of the input shaft vicinity of 2nd Embodiment of the agricultural working machine of this invention. It is a plane cross-sectional enlarged view of the input shaft vicinity of 3rd Embodiment of the agricultural machine of this invention. It is a front enlarged view of the input shaft vicinity of 3rd Embodiment of the agricultural working machine of this invention. It is a plane cross-sectional enlarged view of the input shaft vicinity of 4th Embodiment of the agricultural machine of this invention. It is a front view which shows the specific example of the agricultural machine with which this invention is applied.

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

<First Embodiment>
FIG. 1 is an enlarged plan sectional view of the vicinity of the input shaft of the first 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. In FIG. 1, the lower side is the front side and is attached to the tractor.

  The first bevel gear 102 fixed to the input shaft 101 meshes with the second bevel gear 104, and the second bevel gear 104 and the drive shaft 106 rotate coaxially. The drive shaft 106 and the subsequent parts are transmitted as power necessary for farm work. The bevel case 111 holds the input shaft 101 with the front boss portion 111 a via the 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. Bolts and the like are passed through from the outside, and the bevel case 111 is fixed to a mounting portion 114a (a female screw portion) opened in front of the mission 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.

  Conventionally, one end of a joint (including a universal joint) connected to the tractor is attached to a receiving portion 101a configured by a spline or the like in front of the input shaft 101, and the rotational power is the first bevel gear 102, the second bevel gear 104, the drive shaft 106. Further, it is possible to attach a hitch arm to the hitch arm attaching plates 117 and 118 and connect it to the tractor. Here, by adding the following configuration, it is possible to obtain a part of the rotational power and increase the speed.

  Attachment members 41 and 42 are respectively fixed to the frame pipes 115 and 116, and an attachment member 43 is connected to the front side of these attachment members 41 and 42. The gear case 30 is attached to the attachment member 43. The gear case 30 holds the extended input shaft 11, the first gear 13, the second gear 15, and the transmission shaft 16.

  The extended input shaft 11 has a receiving portion 11a (similar to the receiving portion 101a of the input shaft 101) in the front, and a transmission portion 11b formed of a spline or the like in the middle. Further, a coupling 12 is fixed to the rear end of the extended input shaft 11. 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 coupling 12 has a spline or the like inside and can receive the receiving portion 101 a of the input shaft 101, and can transmit power from the extended input shaft 11 to the input shaft 101. The extension 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. The cylindrical portion 13a of the first gear 13 is inserted into the transmission portion 11b of the extended input shaft 11, and the first gear 13 is attached so as to rotate concentrically with the extended input shaft 11. 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 attached and 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 the present embodiment, the speed is increased by 2 times 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. The position of the power generation device 20 is behind the second pulley 19. 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 a transmission shaft holding portion 30 b that holds the transmission shaft 16 on the side of the input shaft holding portion 30 a that holds the extended input shaft 11 (not necessarily right side). 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.

  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 of the first embodiment will be described.

  The power from the PTO (Power Take Off) of the tractor is transmitted to the extension input shaft 11 through a joint or the like, and the extension input shaft 11 rotates. Then, the input shaft 101 and the first bevel gear 102 connected to the rear end of the extended input shaft 11 through the coupling 12 rotate, mesh 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 extension input shaft 11 also rotates together with the extension input shaft 11, and meshes with the second gear 15 to transmit a part of the power (for example, about 1 horsepower) and increase the speed. The 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). In the case of a generator such as an alternator, a rotational speed of 2000 rpm or more is preferable, and at least 1500 rpm or more is required. Therefore, the speed increasing rate from the rotational speed (rated 540 rpm) input to the extension 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 this embodiment, the speed is surely increased by the two-stage speed increasing means.

  In the present embodiment, the extension input shaft 11 is extended by B in FIG. Therefore, the connection to the tractor is performed by attaching the extension plates 45 and 46 (attachment holes at one end thereof) to the hitch arm attachment plates 117 and 118 (attachment holes at the other end), and further attaching the extension plates 45 and 46 (at the other end). By attaching a conventional hitch arm (with a bolt or the like) to the hole), it is extended by B and can be connected using the conventional hitch arm. The hitch arm itself may be extended without using the extension plates 45 and 46. The same applies to the following embodiments.

<Second Embodiment>
FIG. 3 is an enlarged plan sectional view of the vicinity of the input shaft of the second embodiment of the agricultural machine according to the present invention. In FIG. 3, the position of the power generation device 20, which is an output device, is shifted outward for easy understanding of the mechanism. In the second embodiment, differences from the first embodiment will be described. The same parts are denoted by the same reference numerals.

  The first bevel gear 102 fixed to the input shaft 61 meshes with the second bevel gear 104, and the second bevel gear 104 and the drive shaft 106 rotate coaxially. The drive shaft 106 and the subsequent parts are transmitted as power necessary for farm work. The bevel case 63 holds the input shaft 61 with the front part 63 a on the front side via the bearing 62. Further, the second bevel gear 104 is held by the rear bevel holding portion 63 b via the bearing 123. The bevel gears 102 and 104 are disposed in the mission case 114. 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.

  Attachment members 65 and 66 are fixed to the frame pipes 115 and 116, respectively, and an attachment member 67 is connected to the front side of these attachment members 65 and 66. The gear case 50 is attached to the attachment member 67. The gear case 50 holds the extended input shaft 51, the first gear 13, the second gear 15, and the transmission shaft 56.

  The extended input shaft 51 has a receiving portion 51a (similar to the receiving portion 61a of the input shaft 61) in the front, and a transmission portion 51b formed of a spline in the middle. Further, the coupling 12 is fixed to the rear end of the extended input shaft 51. The receiving portion 51a 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 51a. The coupling 12 has a spline inside and can receive the receiving portion 61 a of the input shaft 61, and can transmit power from the extended input shaft 51 to the input shaft 61. The extension input shaft 51 is rotatably held by the gear case 50 via a bearing 52.

  The first gear 13 is the same as in the first embodiment, and the rear end is in contact with the bearing 52.

  The transmission shaft 56 is attached in the middle so that the second gear 15, which is a spur gear, rotates together with the transmission shaft 56. 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 56 is rotatably held by the gear case 50 via the bearing 54. A first pulley 17 is attached and fixed to the rear end of the transmission shaft 56.

  The first gear 13 and the second gear 15 serve as the first speed increasing means as in the first embodiment.

  The power generation device 20, the first pulley 17, and the second pulley 19 that are output devices are the same as those in the first embodiment.

  The base 35 supports the first pulley 17, the second pulley 19, and the power generation device 20. Further, the pulley case 57 is attached to the base 35 and covers the first pulley 17 and the second pulley 19.

  The fixing of the power generation device 20 is the same as in the first embodiment.

  Next, the operation of the second embodiment will be described.

  The power from the PTO of the tractor is transmitted to the extension input shaft 51 through a joint or the like, and the extension input shaft 51 rotates. Then, the input shaft 61 and the first bevel gear 102 connected to the rear end of the extended input shaft 51 via the coupling 12 rotate, mesh 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, part of the power from the tractor input to the extension input shaft 51 is also transmitted to the first gear 13, and the first gear 13 and the second gear 15 perform the first operation as in the first embodiment. The speed is increased by the speed increasing means and the second speed increasing means by the first pulley 17, the second pulley 19 and the belt 18.

  As with the configuration of the first embodiment, the connection to the tractor extends through the extension plates 68 and 69 and can be connected using a conventional hitch arm. By adopting a simplified structure in the second embodiment, the distance C in FIG. 3 (the distance from the distal end of the extended input shaft to the center of the frame pipe) can be made shorter than in the first embodiment.

<Third Embodiment>
FIG. 4 is an enlarged plan sectional view of the vicinity of the input shaft of the third embodiment of the agricultural machine according to the present invention. FIG. 5 is an enlarged front view. In the third embodiment, differences from the first embodiment will be described. The same parts are denoted by the same reference numerals.

  The configurations of the input shaft 101, the first bevel gear 102, the second bevel gear 104, the drive shaft 106, the bevel case 111, the transmission case 114, the frame pipes 115 and 116, and the hitch arm mounting plates 117 and 118 are the same as in the first embodiment. This portion has a conventional configuration. Here, by adding the following configuration, it is possible to obtain a part of the rotational power and increase the speed.

  The first sprocket 71 is inserted into the receiving portion 101 a of the input shaft 101. For this reason, the center part of the 1st sprocket 71 is spline processed. A cover 78 is fixed to the fixing member 112. This fixing can be carried out by screwing into an attachment female thread portion 112a that can be used for attaching another safety cover. Further, the cover 78 has a bearing portion 78 a, and the output shaft 75 is rotatably supported on the side of the first sprocket 71. A second sprocket 73 is attached to the output shaft 75 and rotates together with the output shaft 75. A chain 72 is bridged between the first sprocket 71 and the second sprocket 73 so that power can be transmitted.

  At this time, the diameter of the first sprocket 71 is larger than the diameter of the second sprocket 73 (for example, twice or more), and the first sprocket 71, the second sprocket 73, and the chain 72 serve as speed increasing means. Yes. In addition, the front side of the output shaft 75 is an output portion 75a having a female screw or the like, and a pump or a generator used for car washing or the like can be attached. In addition, the joint connecting portion 130 that is one end of the joint is fixed to the receiving portion 101 a of the input shaft 101 on the front side of the first sprocket 71. This fixing is performed using a stopper or the like included in the joint connecting portion 130. For this reason, the first sprocket 71 is also prevented from coming off. The sprockets 71 and 73 can be applied to speed increasing means configured by a transmission member other than the sprocket, for example, a combination of gears using spur gears.

  Next, the operation of the third embodiment will be described.

  The power from the PTO of the tractor is transmitted to the input shaft 101 through the joint, and the input shaft 101 rotates. Then, the first bevel gear 102 rotates and 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 sprocket 71 attached to the input shaft 101 also rotates together with the input shaft 101, and a part of the power is transmitted to the second sprocket 73 via the chain 72 to be accelerated. When the second sprocket 73 rotates, the output shaft 75 also rotates, and the increased power is output to the output unit 75a.

  In the third embodiment, since the input shaft 101 is not extended, the conventional hitch arm can be directly connected to the hitch arm mounting plates 117 and 118 for connection to the tractor. In this case, for example, the distance A from the center of the frame pipe 115 to the tip of the input shaft 101 is the same as the conventional one, and the weight balance does not change.

<Fourth Embodiment>
FIG. 6 is an enlarged plan cross-sectional view of the vicinity of the input shaft of the fourth embodiment of the agricultural machine according to the present invention. In the fourth embodiment, differences from the first embodiment will be described. The same parts are denoted by the same reference numerals.

  The configurations of the input shaft 101, the first bevel gear 102, the second bevel gear 104, the drive shaft 106, the bevel case 111, the transmission case 114, the frame pipes 115 and 116, and the hitch arm mounting plates 117 and 118 are the same as in the first embodiment. This portion has a conventional configuration. Here, by adding the following configuration, it is possible to provide means for obtaining a part of the rotational power and increasing the speed.

  The attachment frame 91 is attached to the bevel case 111. The mounting frame 91 has a flange portion 91a and a mounting hole 91b at one end, and mounting is performed by attaching a bolt 125 for mounting the bevel case 111 (via the hole 111c) to the transmission case 114 (the mounting portion 114a). It can be fixed by tightening it through the mounting hole 91b. The shape of the mounting frame 91 may be a cylinder or a necessary frame structure.

  The gear case 90 is fixed to the front end portion of the mounting frame 91. The gear case 90 has an extended input shaft 84, a first gear 81, and a second gear 82.

  The extended input shaft 84 has a receiving portion 84a (similar to the receiving portion 101a of the input shaft 101) in the front, and a coupling 83 is fixed on the rear side. The coupling 83 has a spline or the like inside and can receive the receiving portion 101 a of the input shaft 101, and can transmit power from the extended input shaft 84 to the input shaft 101. Further, a first gear 81 configured by a spur gear is provided outside the coupling 83 and rotates together with the coupling. The coupling 83 is rotatably held by the gear case 90 via a first bearing 86 and a second bearing 87 located on both sides of the first gear 81.

  A second gear 82 is attached to the output shaft 85 and rotates together with the output shaft 85. The second gear 82 is a spur gear that meshes with the first gear 81. Further, the front side of the output shaft 85 is an output portion 85a, and a pump or a generator used for car washing or the like can be attached. The output shaft 85 is rotatably held in the gear case 90 by a third bearing 88 and a fourth bearing 89 disposed on both sides of the second gear 82.

  These first gear 81 and second gear 82 serve as speed increasing means. In this embodiment, the speed is increased by a factor of two or more by this speed increasing means.

  Next, the operation of the fourth embodiment will be described.

  The power from the PTO of the tractor is transmitted to the extension input shaft 84 and rotates. Further, the input shaft 101 also rotates through the coupling 83. Then, the first bevel gear 102 rotates and 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 81 fixed to the coupling 83 also rotates together with the input shaft 101, and a part of the power is transmitted to the second gear 82 to be accelerated. When the second gear 82 rotates, the output shaft 85 also rotates, and the increased power is output to the output unit 85a.

  The connection to the tractor can be performed by extending a distance D in FIG. 6 through the extension plates 93 and 94 and attaching a conventional hitch arm as in the first embodiment. In the case of the present embodiment, by attaching the bearings 86 and 87 to the coupling 83, the extension distance can be shortened, and the distance is shorter than B of the first embodiment.

<Specific examples of agricultural machines>
FIG. 7 is a front view showing a specific example of an agricultural machine to which the present invention is applied. 7 is a scraper having a folding mechanism. In FIG. 7, the front side is attached to the rear portion of the tractor 1, and PTO power from the tractor is obtained to rotate the scraper claw within the cover 152. To perform the scraping work. The embodiment described above can be applied to this agricultural machine.

  When the cylinder expands and contracts, the electric hydraulic cylinder 156 can actuate the rotation mechanism 157 to fold the side working portion 155 upward (as shown on the left side in FIG. 7), thereby shortening the entire width of the scraper. The extension rake opening / closing device 160 can select whether to use the extension rake 161 by rotating the extension rake 161 left and right via the control bar 162 and the wire 163 as the internal motor rotates. . The earthing unit 166 can adjust the earthing by controlling the vertical movement of the rear rake via the earthing part 167 by the rotation of an internal motor.

  The electric hydraulic cylinder 156, the extension rake opening / closing device 160 (motor), and the earthing unit 166 (motor) generate electric power generated by using the rotation of the output shaft such as the power generation device 20 increased in the present invention. Can be activated by. This eliminates the need for a power harness from the tractor side.

  Although FIG. 7 shows an example of one type of agricultural machine, the present invention is not limited to this, and the present invention can be applied to all agricultural machines having an input shaft that is attached to a tractor and receives power from the tractor.

  In 1st Embodiment and 2nd Embodiment, although demonstrated as the electric power generating apparatus 20, you may attach the pump for car wash etc. besides this. In the third embodiment and the fourth embodiment, a car wash pump or the like can be attached to the output portions 75a and 85a, for example, like the pump 140 of FIG.

11, 51, 84 Extension input shafts 12, 83 Couplings 13, 81 First gears 15, 82 Second gears 16, 56 Transmission shafts 17 First pulley 18 Belt 19 Second pulley 20 Power generation devices 30, 50, 90 Gear case 41, 42, 43, 65, 66, 67 Mounting member 45, 46, 68, 69, 93, 94 Extension plate 61, 101 Input shaft 63, 111 Bevel case 71 First sprocket 72 Chain 73 Second sprocket 75, 85 Output Shaft 78 Cover 91 Mounting frame 112 Fixing member 114 Mission case 115, 116 Frame pipe 117, 118 Hitch arm mounting plate 130 Joint connection part

Claims (6)

Agricultural work machines that are attached to tractors and perform farm work.
An extension input shaft that receives rotational power from the tractor, a coupling that is fixed to the other end of the extension input shaft, and an input that is connected to the coupling and transmits rotational power from the extension input shaft into the transmission case. An agricultural working machine comprising: a shaft; and a speed increasing means for obtaining a part of rotational power of the extension input shaft and increasing the speed of rotation to output. The agricultural machine according to claim 1,
The speed increasing means is composed of two stages of a first speed increasing means and a second speed increasing means. In the agricultural machine according to claim 1 or 2,
A farm machine, wherein a position of a hitch arm for connecting a farm machine to the tractor is extended by an amount corresponding to a length extended by the extension input shaft. In the agricultural machine according to any one of claims 1 to 3,
An agricultural machine having an output device that receives rotation increased by the speed increasing means, and the output device is a power generator. In the agricultural machine according to any one of claims 1 to 3,
An agricultural machine having an output device that receives rotation increased by the speed increasing means, and the output device is a car wash pump. Agricultural work machines that are attached to tractors and perform farm work.
An input shaft that receives rotational power from the tractor and transmits it into the transmission case, a transmission means that is fitted into the input shaft and rotates coaxially, and a connecting portion is fixed to the input shaft at a tip end of the transmission means. A farm working machine comprising: a joint that transmits power from the power source; and a speed increasing means that obtains a part of the rotational power of the input shaft using the power transmission means to increase the rotation speed and output the speed.

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