Offset Machine

Abstract

To increase an offset amount without elongating a link arm in an offset work machine.SOLUTION: An offset work machine comprises a mounting part connectable to a traveling machine body, a work part receiving power from the traveling machine body to perform prescribed work, a power transmission part for transmitting the power from the mounting part to the work part, and an offset mechanism part disposed between the mounting part and the work part and rotationally turning to the mounting part to move the work part in the horizontal direction. The mounting part includes an input shaft for inputting the power from the traveling machine body, an output shaft for outputting the power to the power transmission part, and power transmission means for transmitting the power from the input shaft to the output shaft, where the output shaft is provided at a position offset from the input shaft in the horizontal direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an offset working machine. [Background technology]

[0002] Conventionally, mowers are known as working machines that perform mowing work to remove weeds from farm roads and wastelands. Generally, mowers are attached to the rear of a traveling body such as a tractor, and proceed with mowing work by operating a working unit while moving together with the traveling body. In recent years, offset type mowers have been known in which the working unit that performs mowing work moves offset to the side of the traveling body, and performs mowing work on the side of the traveling body. For example, the mowers described in Patent Documents 1 to 3 have an offset mechanism unit composed of a parallel link mechanism between the mounting unit attached to the traveling body and the working unit that performs mowing, and the offset mechanism unit enables the offset movement of the working unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-102223 A [Patent Document 2] JP 2012-39941 A [Patent Document 3] JP 2012-191864 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the offset working machines described in Patent Documents 1 to 3, the offset amount (the amount of offset movement) can be increased by lengthening the arm member (link arm) that constitutes the parallel link mechanism. However, simply lengthening the link arm increases the distance between the traveling body and the working unit, which causes a problem that the matching balance becomes poor when the working unit is moved to the rear of the traveling body (when the offset amount is reduced). In addition, when the link arm is longer, the load on the link arm increases, which causes a problem that reinforcement or the like is required to maintain the strength of the link arm.

[0005] Furthermore, in the grass cutters described in Patent Documents 2 and 3, the mounting part and the working part are connected by a universal joint in order to transmit the power input from the traveling body to the working part. At this time, since the bending angle of the universal joint is limited, the offset amount is restricted by the bending angle of the universal joint. Therefore, in the offset type grass cutters using the universal joint described in Patent Documents 2 and 3, it is even more difficult to ensure the offset amount.

[0006] An object of the present invention is to increase the amount of offset in an offset work machine without increasing the length of the link arm. [Means for solving the problem]

[0007] In one embodiment of the present invention, the offset work machine comprises a mounting section that can be connected to a running body, a working section that receives power from the running body and performs a specified task, a power transmission section that transmits the power from the mounting section to the working section, and an offset mechanism section that is arranged between the mounting section and the working section and moves the working section in the left-right direction by rotating relative to the mounting section, and the mounting section includes an input shaft that inputs the power from the running body, an output shaft that outputs the power to the power transmission section, and a power transmission means that transmits the power from the input shaft to the output shaft, and the output shaft is arranged at a position offset from the input shaft in the left-right direction.

[0008] The power transmission means may include a roller chain wound between a pair of sprockets.

[0009] The power transmission portion may be disposed so as to overlap a portion of the offset mechanism portion.

[0010] The power transmission unit may be rotatably connected to the mounting unit, and a rotation center of the power transmission unit may coincide with a rotation center of the offset mechanism.

[0011] The power transmission unit may include a roller chain wound between a pair of sprockets.

[0012] The power transmission part may be a universal joint.

[0013] The offset mechanism may be coupled to the mounting portion at a position farther away from the input shaft than the output shaft. Effect of the Invention

[0014] The offset work machine in one embodiment of the present invention can increase the offset amount without increasing the length of the link arm. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a plan view showing a configuration of an offset working machine according to a first embodiment. [Diagram 2] FIG. 2 is a plan view showing the configuration of the offset working machine of the first embodiment, with the power transmission unit not shown. [Diagram 3] FIG. 2 is an enlarged front view of a mounting portion in the offset working machine according to the first embodiment. [Figure 4] FIG. 11 is a plan view showing the configuration of an offset working machine according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an offset working machine according to an embodiment of the present invention will be described with reference to the drawings. However, the offset working machine according to an embodiment of the present invention can be implemented in many different forms, and should not be interpreted as being limited to the description of the examples shown below. In the drawings referred to in this embodiment, the same parts or parts having similar functions are given the same reference numerals, and repeated explanations thereof will be omitted.

[0017] In the following description, for convenience of explanation, terms indicating directions such as "up," "down," "front," "rear," "right," and "left" are used, but for the offset work machine of one embodiment of the present invention, the direction in which gravity acts is "down," and its opposite is "up." Also, the direction in which the traveling body moves is "front," and its opposite is "rear." Furthermore, when facing "front," the right side is "right," and the left side is "left."

[0018] First embodiment [Offset machine configuration] 1 is a plan view showing the configuration of an offset working machine 100 according to a first embodiment. In this embodiment, an offset type mower is illustrated as an example of the offset working machine 100. However, the offset working machine 100 is not limited to a mower, and may be other offset type working machines such as a ridger or a plow.

[0019] As shown in Fig. 1, the offset work machine 100 of this embodiment includes a mounting unit 10, an offset mechanism unit 20, a power transmission unit 30, and a working unit 40. Specifically, the offset work machine 100 is connected to a traveling machine body (not shown) such as a tractor by the mounting unit 10. The mounting unit 10 and the working unit 40 are connected via the offset mechanism unit 20 and the power transmission unit 30. With this configuration, the offset work machine 100 moves forward as the traveling machine body travels. While the offset work machine 100 moves, the working unit 40 operates by power received from the traveling machine body to perform grass cutting work.

[0020] The mounting unit 10 is a portion that is connected to a three-point link mechanism (not shown) provided on the traveling machine body. Specifically, the mounting unit 10 of this embodiment includes a front frame 11, a top link connection part (top mast) 12 (not shown in FIG. 1, see FIG. 3), a lower link connection part (lower link pin) 13, an input shaft 14, a power transmission means 15, and an output shaft 16. The top link connection part 12 and the lower link connection part 13 may be connected to the three-point link mechanism of the traveling machine body via an auto hitch arm (not shown). In this embodiment, the output shaft 16 is provided at a position offset from the input shaft 14 in the left-right direction. A detailed configuration of the mounting unit 10 will be described later.

[0021] The offset mechanism 20 is disposed between the mounting unit 10 and the working unit 40, and is a mechanism for moving the working unit 40 in the left-right direction by rotating with respect to the mounting unit 10. In this embodiment, the offset mechanism 20 includes a parallel link mechanism rotatably connected to the mounting unit 10 and the working unit 40. That is, by rotating the offset mechanism 20 with respect to the mounting unit 10, the working unit 40 can be moved in the left-right direction while maintaining the orientation of the working unit 40 with respect to the traveling direction. In other words, the offset mechanism 20 can offset and move the working unit 40 laterally with respect to the traveling direction of the traveling machine body.

[0022] 2 is a plan view showing the configuration of the offset work machine 100 of the first embodiment, omitting the illustration of the power transmission unit 30. As shown in FIG. 2, the offset mechanism unit 20 of this embodiment has a first link arm 21, a second link arm 22, a third link arm 23, and an expandable member 24.

[0023] 1. That is, the power transmission unit 30 is disposed so as to overlap a part of the offset mechanism unit 20. One end on the front side of the first link arm 21 is rotatably connected to the front frame 11 of the mounting unit 10, and the other end on the rear side of the first link arm 21 is rotatably connected to the third link arm 23 and the working unit 40.

[0024] The second link arm 22 is disposed approximately parallel to the first link arm 21 at a position spaced apart from the first link arm 21, and has approximately the same length as the first link arm 21. One end on the front side of the second link arm 22 is rotatably connected to the front frame 11 of the mounting unit 10, and the other end on the rear side of the second link arm 22 is rotatably connected to the third link arm 23.

[0025] The third link arm 23 is disposed approximately parallel to the front frame 11, and connects the first link arm 21 and the second link arm 22 to each other. One end of the third link arm 23 connected to the first link arm 21 is fixed to the working unit 40, and is configured so that the positional relationship between the third link arm 23 and the working unit 40 does not change.

[0026] With the above configuration, the front frame 11, the first link arm 21, the second link arm 22, and the third link arm 23 form a quadrilateral parallel link mechanism with each of the front frame 11, the first link arm 21, the second link arm 22, and the third link arm 23 as sides. With this parallel link mechanism, the offset mechanism unit 20 can offset and move the working unit 40 in the left-right direction while maintaining the orientation of the working unit 40 so that the longitudinal direction of the working unit 40 is approximately parallel to the left-right direction.

[0027] The telescopic member 24 is a power source (actuator) that operates the offset mechanism unit 20, and is composed of, for example, an electric cylinder, a gas cylinder, a hydraulic cylinder, or the like. One end of the telescopic member 24 is connected to the front frame 11, and the other end of the telescopic member 24 is connected to the first link arm 21 via a bracket provided near the center of the first link arm 21 (or slightly rearward of the center). Due to the telescopic operation of the telescopic member 24, the first link arm 21 rotates about the fulcrum pipe 154 as a rotation fulcrum, and the offset mechanism unit 20 operates. The offset amount of the working unit 40 is controlled by the amount of expansion and contraction of the telescopic member 24.

[0028] Returning to Fig. 1 for explanation, the power transmission unit 30 is a mechanism for transmitting the power transmitted via the input shaft 14, the power transmission means 15, and the output shaft 16 of the mounting unit 10 to the working unit 40. As described above, the power transmission unit 30 is disposed overlapping a part of the offset mechanism unit 20, specifically, the upper side of the first link arm 21.

[0029] The offset work machine 100 of this embodiment uses a chain drive mechanism as the power transmission unit 30. Specifically, the power transmission unit 30 has at least a driving sprocket 31, a driven sprocket 32, and a roller chain 33. The roller chain 33 is configured to be wound around a pair of sprockets (the driving sprocket 31 and the driven sprocket 32).

[0030] The driving sprocket 31 is a gear that rotates in engagement with the rotating output shaft 16, and transmits the rotational power received from the output shaft 16. The driven sprocket 32 ​​is a gear that passively rotates by the power transmitted from the driving sprocket 31 via a roller chain 33. The roller chain 33 is a member that transmits power as tension. Note that the power transmission unit 30 is not limited to a chain drive mechanism, and may be configured as a belt drive mechanism using a pair of pulleys and a belt.

[0031] The front of the power transmission unit 30 is rotatably connected to the mounting unit 10, and the rear of the power transmission unit 30 is rotatably connected to the working unit 40. In this embodiment, the rotation center of the power transmission unit 30 relative to the mounting unit 10 coincides with the rotation center of the drive sprocket 31. In other words, the rotation center of the power transmission unit 30 relative to the mounting unit 10 coincides with the rotation center of the output shaft 16. In addition, the rotation center of the power transmission unit 30 relative to the working unit 40 coincides with the rotation center of the driven sprocket 32.

[0032] Furthermore, the center of rotation of the power transmission unit 30 relative to the mounting unit 10 coincides with the center of rotation of the offset mechanism unit 20 (specifically, the first link arm 21) relative to the mounting unit 10. In this manner, in this embodiment, the first link arm 21, which is a part of the offset mechanism unit 20, and the power transmission unit 30 rotate integrally relative to the mounting unit 10, and therefore there is an advantage that a large offset amount can be ensured without being restricted by a bending angle as occurs when a universal joint is used for power transmission. Also, when the working unit 40 is stored (when not working), it is possible to arrange the working unit 40 close to the traveling machine body in the front-rear direction.

[0033] The working unit 40 is a part that performs grass cutting work, and includes a work rotor 41 and a blade drive unit 42. In the working unit 40, the blade drive unit 42 receives power transmitted by the power transmission unit 30 to drive the work rotor 41, thereby performing grass cutting work. The work rotor 41 includes a claw shaft 41a and a plurality of blades 41b radially provided on the claw shaft 41a. The claw shaft 41a extends in the left-right direction so as to be substantially perpendicular to the traveling direction of the traveling machine body. The work rotor 41 performs grass cutting by rotating the plurality of blades 41b together with the claw shaft 41a. The blade drive unit 42 uses the power transmitted by the power transmission unit 30 as the rotation power of the claw shaft 41a of the work rotor 41. The blade drive unit 42 may be a chain drive mechanism having a configuration similar to that of the power transmission unit 30, or may be a belt drive mechanism.

[0034] [Configuration of the mounting part] The configuration of the mounting unit 10 in the offset working machine 100 of the first embodiment will be described with reference to FIG.

[0035] FIG. 3 is an enlarged front view of the mounting unit 10 in the offset working machine 100 of the first embodiment. As described above, the mounting unit 10 includes the front frame 11, the top link connecting unit 12, the lower link connecting unit 13, the input shaft 14, the power transmission means 15, and the output shaft 16. The front frame 11 extends in the left-right direction and supports the top link connecting unit 12, the lower link connecting unit 13, the input shaft 14, the power transmission means 15, and the output shaft 16. The input shaft 14 is a shaft that receives power from the traveling machine body. In other words, the input shaft 14 has a function of receiving power from a PTO shaft (not shown) of the traveling machine body. The power transmission means 15 is a means for transmitting power from the input shaft 14 to the output shaft 16. The output shaft 16 is a shaft that outputs the power transmitted from the input shaft 14 via the power transmission means 15 to the power transmission unit 30.

[0036] As shown in FIG. 3, the power transmission means 15 includes a chain drive mechanism 151, an intermediate shaft 152, and a gear box 153.

[0037] The chain drive mechanism 151 is a means for transmitting power received from the traveling machine body via the input shaft 14 to the intermediate shaft 152. The chain drive mechanism 151 includes a drive sprocket 201, a driven sprocket 202, and a roller chain 203. The roller chain 203 is configured to be wound around a pair of sprockets (the drive sprocket 201 and the driven sprocket 202).

[0038] The driving sprocket 201 engages with the input shaft 14 and rotates with the rotation of the input shaft 14. The rotation of the driving sprocket 201 is transmitted to the driven sprocket 202 via a roller chain 203. When the driven sprocket 202 rotates, the intermediate shaft 152 engaged with the driven sprocket 202 rotates. In this manner, the power input via the input shaft 14 is transmitted to the intermediate shaft 152 via the chain drive mechanism 151.

[0039] The intermediate shaft 152 extends in the front-rear direction as shown in FIG. 1, and transmits the rotation transmitted from the driven sprocket 202 to the gear box 153. The gear box 153 has a function of converting the speed and torque of the input rotation, and a function of converting the transmission direction (axial direction) of the power transmitted from the intermediate shaft 152. Specifically, the gear box 153 has a function of converting the rotation axis so that the power transmitted in the front-rear direction by the intermediate shaft 152 is transmitted in the up-down direction (vertical direction) by the output shaft 16. A known technology can be used as a mechanism for converting the input rotational power into the rotational power of a different rotational shaft and outputting it. In this embodiment, an example is illustrated in which a gear box is used for axis conversion of the rotational power, but the present invention is not limited to this example, and the configuration may be configured to have only a function of converting the rotational axis of the rotational power transmitted from the intermediate shaft 152 to the up-down direction.

[0040] The rotational power whose axis has been converted by the gear box 153 is output by the output shaft 16. The output shaft 16 passes through the inside of a fulcrum pipe 154 and engages with the drive sprocket 31. The fulcrum pipe 154 is a cylindrical member fixed to the gear box 153. The fulcrum pipe 154 functions as a rotation fulcrum for the first link arm 21 of the offset mechanism unit 20. The output shaft 16 inserted inside the fulcrum pipe 154 transmits the power whose rotation axis has been converted by the gear box 153 to the drive sprocket 31 of the power transmission unit 30.

[0041] As described above, the power input from the input shaft 14 is transmitted in the left-right direction via the chain drive mechanism 151, and in the front-rear direction via the intermediate shaft 152, and then input to the gear box 153. The power input to the gear box 153 has its rotation axis changed and is transmitted in the up-down direction via the output shaft 16. Finally, the power transmitted by the output shaft 16 is transmitted to the power transmission section 30 including the drive sprocket 31.

[0042] 1 and 3, the intermediate shaft 152 is provided at a position (offset position) separated from the input shaft 14 in the left-right direction (specifically, in the offset direction of the working unit 40). In addition, since the position of the intermediate shaft 152 in the left-right direction coincides with the position of the output shaft 16, it can also be said that the output shaft 16 is provided at a position offset from the input shaft 14 in the left-right direction. In other words, the offset working machine 100 of this embodiment is structured so that the power input from the input shaft 14 is output at a position offset in the left-right direction from the rotation center (shaft center) of the input shaft 14.

[0043] As described above, all offset working machines of the prior art are configured such that the output shaft is provided on the same straight line as the axial direction of the input shaft that receives power from the traveling body (i.e., on the center line of the input shaft). For example, in the offset working machine described in JP 2018-102223 A, the rotation center of the power transmission unit (in other words, the rotation center of the offset frame in the offset mechanism unit) is located behind the center line of the input shaft.

[0044] In contrast, in the offset working machine 100 of this embodiment, the output shaft 16 is provided at a position offset in the left-right direction relative to the input shaft 14, and therefore the rotation center of the power transmission unit 30 (i.e., the rotation center of the first link arm 21 in the offset mechanism unit 20) is at a position offset in the left-right direction relative to the input shaft 14. In other words, the offset working machine 100 can increase the offset amount of the working unit 40 by the amount that the output shaft 16 is offset in the left-right direction, compared to offset working machines of the conventional technology.

[0045] As described above, in this embodiment, the position of the output shaft 16 that outputs power (transmits power to the power transmission unit 30) is offset in the left-right direction from the position of the input shaft 14 that inputs power in a plan view. This structure makes it possible to position the rotation fulcrum of the offset mechanism unit 20 and the power transmission unit 30 near the end of the front frame 11 (near the right end in FIG. 1), and accordingly, even when a link arm of the same length as that of the conventional technology is used, the offset amount of the working unit 40 can be increased. In other words, according to this embodiment, the offset amount can be increased without increasing the length of the link arm.

[0046] In this embodiment, the power transmission means 15 is configured by a chain drive mechanism, but is not limited to this. For example, instead of the chain drive mechanism, it may be configured by a gear drive mechanism. In this case, the gear drive mechanism may be configured by a plurality of gears that transmit power in the left-right direction so that the power input from the input shaft 14 is transmitted to the intermediate shaft 152.

[0047] Second Embodiment 4 is a plan view showing the configuration of an offset working machine 100a of the second embodiment. The offset working machine 100a of this embodiment has a configuration using a universal joint as a power transmission unit 30a. In the following description, the same reference numerals are used in the drawings for configurations similar to those of the first embodiment, and descriptions thereof may be omitted.

[0048] 4, the offset working machine 100a of this embodiment includes a mounting unit 10a, an offset mechanism unit 20a, a power transmission unit 30a, and a working unit 40. The offset working machine 100a of this embodiment differs from the offset working machine 100 of the first embodiment in that, for example, power is transmitted from the mounting unit 10a to the working unit 40 using the power transmission unit 30a formed of a universal joint, and that the offset mechanism unit 20a and the power transmission unit 30a are disposed at separate positions.

[0049] As shown in FIG. 4, in the offset working machine 100a of this embodiment, the output shaft 18 is provided at a position offset from the input shaft 14 in the left-right direction. That is, similar to the first embodiment, the power input from the input shaft 14 is output at a position offset from the rotation center (shaft center) of the input shaft 14 in the left-right direction (specifically, the offset direction). In this embodiment, the power is transmitted between the input shaft 14 and the output shaft 18 by a chain drive mechanism 151, similar to the first embodiment. That is, the offset working machine 100a of this embodiment includes the chain drive mechanism 151 as a power transmission means for transmitting power from the input shaft 14 to the output shaft 18. The specific structure of the chain drive mechanism 151 is similar to that of the first embodiment, and therefore will not be described here.

[0050] The power output from the output shaft 18 is transmitted to the blade drive unit 42 of the working unit 40 by a universal joint serving as the power transmission unit 30a. Specifically, in the offset work machine 100a, the input side connector 31a of the power transmission unit 30a is connected to the output shaft 18, and the output side connector 32a is connected to the blade drive unit 42. The power transmitted to the blade drive unit 42 via the universal joint has the direction of the rotation axis changed inside the blade drive unit 42, and is used as power to rotate the claw shaft 41a.

[0051] The offset working machine 100a of this embodiment includes, as the offset mechanism 20a, a first link arm 301, a second link arm 302, a connecting portion 11a, and a connecting portion 43. As shown in Fig. 4, the offset mechanism 20a is connected to the mounting portion 10a at a position farther away from the input shaft 14 than the output shaft 18 is.

[0052] One end of the first link arm 301 and the second link arm 302 is connected to a connecting portion 11a provided on the front frame 11 of the mounting unit 10a. The other end of the first link arm 301 and the second link arm 302 is connected to a connecting portion 43 provided on the working unit 40. In other words, the offset mechanism unit 20a includes a parallel link mechanism constituted by the first link arm 301, the second link arm 302, the connecting portion 11a, and the connecting portion 43. Although not shown in the figure, the offset mechanism unit 20a has an expandable member, and the first link arm 301 rotates due to the expansion and contraction action of the expandable member, thereby driving the offset mechanism unit 20a.

[0053] As described above, all conventional offset work machines using a universal joint are configured such that the output shaft is provided on the same straight line as the axial direction of the input shaft that receives power from the traveling body (i.e., on the center line of the input shaft). For example, in the offset work machines described in JP 2012-39941 A or JP 2012-191864 A, the input side connecting part of the universal joint, which is the power transmission part, is located behind the center line of the input shaft.

[0054] In contrast, in the offset working machine 100a of this embodiment, the output shaft 18 is provided at a position offset in the left-right direction relative to the input shaft 14, so that the input side connecting portion 31a of the power transmission unit 30a is at a position offset in the left-right direction (specifically, the offset direction) relative to the input shaft 14. As a result, even if the working unit 40 is offset by the same offset amount as in the offset working machine of the prior art, the offset amount can be further increased because there is a margin in the bending angle of the universal joint. In other words, the offset working machine 100a can increase the offset amount of the working unit 40 by the amount that the output shaft 18 is offset in the left-right direction compared to the offset working machine of the prior art. Furthermore, according to this embodiment, when a predetermined offset amount is ensured, it is possible to configure the offset mechanism unit 20a (first link arm 301 and second link arm 302) and the power transmission unit 30a (universal joint) to be shorter in length than the offset working machine of the prior art.

[0055] As described above, in this embodiment, the position of the output shaft 18 that outputs power (transmits power to the power transmission unit 30a) is offset in the left-right direction relative to the position of the input shaft 14 that inputs power in a plan view. With this structure, the rotation fulcrum of the universal joint that functions as the power transmission unit 30a can be moved in the offset direction of the working unit 40 (rightward in FIG. 4) from the position of the input shaft 14. As a result, even if a link arm of the same length as that of the conventional technology is used, the offset amount of the working unit 40 can be increased by the amount of the movement of the rotation fulcrum of the universal joint. In other words, according to this embodiment, the offset amount can be increased without increasing the length of the link arm.

[0056] The present invention has been described above with reference to the drawings, but the present invention is not limited to the above-mentioned embodiments (including modified examples), and can be modified as appropriate without departing from the spirit of the present invention. For example, a person skilled in the art can add, delete, or modify components as appropriate based on each embodiment, and the scope of the present invention is included as long as the gist of the present invention is met. Furthermore, the above-mentioned embodiments can be combined as appropriate as long as there is no mutual contradiction, and technical matters common to each embodiment are included in each embodiment even if not explicitly stated.

[0057] Even if there are other effects and advantages different from those brought about by the aspects of each of the above-mentioned embodiments, those which are clear from the description in this specification or which can be easily predicted by a person skilled in the art are naturally understood to be brought about by the present invention. [Explanation of symbols]

[0058] 10, 10a... mounting portion, 11... front frame, 11a... connecting portion, 12... top link connecting portion, 13... lower link connecting portion, 14... input shaft, 15... power transmission means, 16, 18... output shaft, 20, 20a... offset mechanism portion, 21... first link arm, 22... second link arm, 23... third link arm, 24... expandable member, 30, 30a... power transmission portion, 31... driving sprocket, 31a... input side connecting portion, 32... driven sprocket, 32a...output side connecting portion, 33...roller chain, 40...working portion, 41...working rotor, 41a...claw shaft, 41b...cutting blade, 42...cutting blade driving portion, 43...connecting portion, 100, 100a...offset working machine, 151...chain driving mechanism, 152...relay shaft, 153...gear box, 154...fulcrum pipe, 201...driving sprocket, 202...driven sprocket, 203...roller chain, 301...first link arm, 302...second link arm

Claims

1. A mounting part that can be connected to the traveling body; A working unit that receives power from the traveling machine body and performs a predetermined task; a power transmission unit that transmits the power from the mounting unit to the working unit; an offset mechanism that is disposed between the mounting portion and the working portion and rotates relative to the mounting portion to move the working portion in the left-right direction; Equipped with The mounting unit includes an input shaft that inputs the power from the traveling machine body, an output shaft that outputs the power to the power transmission unit, and a power transmission means that transmits the power from the input shaft to the output shaft, the output shaft is provided at a position offset from the input shaft in the left-right direction, An offset work machine, wherein a rotation center of the offset mechanism is provided at a position offset from the input shaft in the left-right direction.

2. 2. The offset work machine according to claim 1, wherein the power transmission means includes a roller chain wound between a pair of sprockets.

3. The offset work machine according to claim 1 or 2, wherein the power transmission section is disposed so as to overlap a part of the offset mechanism section.

4. The power transmission unit is rotatably connected to the mounting unit, The offset work machine according to claim 3 , wherein a rotation center of the power transmission unit coincides with a rotation center of the offset mechanism unit.

5. The offset work machine according to claim 3 or 4, wherein the power transmission unit includes a roller chain wound around a pair of sprockets.

6. The offset work machine according to claim 1 or 2, wherein the power transmission unit is a universal joint.

7. The offset work machine according to claim 6, wherein the offset mechanism is connected to the mounting portion at a position farther away from the input shaft than the output shaft is.

Images