JP5700510B2 - Mower - Google Patents

Description

  The present invention relates to a lawn mower, and more particularly, to a lawn mower that is capable of offset-moving a working part that performs a mowing operation on a mounting part attached to a tractor and that transmits power from a tractor by a power transmission member.

  FIG. 4 is a plan view showing an example of a conventional mower, and FIG. 5 is a plan view showing an example of an offset movement state of the conventional mower. The conventional mower 100 is configured by a mounting unit 110, a working unit 150, arms 120 and 125 that connect between them, a mounting member 130, a joint 140 that is a power transmission member, and the like. The mounting unit 110 is mounted on the rear portion of the tractor 200 (not shown) and the working unit 150 performs the mowing work.

  A parallel link is formed between the mounting unit 110 and the working unit 150 by the two arms 120 and 125, and when the offset cylinder 128 is operated, the parallel link moves as shown in FIG. The position of 150 can be changed laterally between P and Q. In addition, transmission of power between the mounting unit 110 and the working unit 150 is transmitted through the joint 140.

  As another example of a conventional mower, Patent Document 1 discloses a mowing apparatus that can perform a lateral operation by a forward movement of a traveling machine and a backward operation by a backward movement by horizontally rotating a working unit.

JP 2010-11796 A

  The amount of offset movement is limited by the bending angle of the joint. In the case of the conventional example shown in FIGS. 4 and 5, the bending angle of the joint 140 becomes maximum at the position where the working unit 150 is outside, that is, the position Q in FIGS. 4 and 5 (A in FIG. 4). As described above, in order to secure the offset amount, it is necessary to increase the bending angle of the joint. Therefore, when the work is performed at the offset position, the joint may be damaged due to vibration or increased load. It was.

  In view of the above problems, the present invention reduces the bending angle of the power transmission member to be used when mowing the working part that performs the mowing work with respect to the mounting part that is attached to the tractor. The aim is to provide a possible mower.

To achieve the above object, mower of the present invention, in a mowing machine which performs mowing work mounted on a tractor, and a mounting portion for have a first input shaft which is mounted to the tractor entering the power from the tractor, and a link portion connecting the working unit to perform the mowing rotate the mowing shaft by the power which is transmitted from the second input shaft has a second input shaft, the working portion and the mounting portion so as to be offset, the first 1 and an input shaft and the second input shaft connected to the middle and transmits power angle changes stretchable capable power transmission of member, the front Symbol link portion, the working portion of the back of the mounting portion The working unit is configured to be inclined in the first input shaft direction when offset is moved laterally outward from the position, and the bending angle of the power transmission member at this time is inclined to the working unit. It is smaller than the case without arrangement, before The working unit is characterized by at any position of the position obtained by offsetting moved to the position and laterally outwardly behind the mounting portion is capable of mowing.

Furthermore, the mower of the present invention is characterized in that an angle at which the working unit is inclined in the first input shaft direction is in a range of 1 ° to 30 °.
Furthermore, in the mower according to the present invention, the link portion is formed by two arms supported by fulcrums pivotable in the horizontal direction on the mounting portion side and the working portion side, and the arms are arranged in parallel. The length of one arm is long.
Furthermore, in the mower according to the present invention, the link portion is formed by two arms supported by fulcrums pivotable in the horizontal direction on the mounting portion side and the working portion side, respectively, and the arms have the same length. The distance between the fulcrums on the mounting portion side is shorter than the distance between the fulcrums on the working portion side.

  According to the present invention, in the mower, when the mowing operation is performed by offset-moving the working unit that performs the mowing work, the bending angle of the power transmission member to be used can be reduced and the mowing work can be performed.

It is a top view which shows the mower of Example 1 of this invention. It is a side view of the working part which shows one Embodiment of the mower of this invention. It is a top view which shows the mower of Example 2 of this invention. It is a top view which shows the example of the conventional mower. It is a top view which shows the example of a state of the offset movement of the conventional mower.

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

  FIG. 1 is a plan view showing a mower according to a first embodiment of the present invention. FIG. 2 is a side view of a working unit showing an embodiment of the mower of the present invention.

  The mower 1 according to the first embodiment is configured by the mounting portion 10, the working portion 150, the arms 21 and 22, the attachment member 30, the joint 140, and the like that connect the mounting portion 10 and the working portion 150. The mounting unit 10 is mounted on the rear portion of the tractor 200 (not shown) and the working unit 150 performs the mowing work.

  The power from the tractor 200 is transmitted to the first input shaft 115 attached to the mounting unit 10, the joint 140, and the second input shaft 161 on the working unit 150 side. The second input shaft 161 is installed in a mission case 165 provided near the left end (opposite side of offset movement) on the cover 151, and the power from the second input shaft 161 is transmitted in the mission case 165. The bevel gears 162 and 163 are sent to the side of the working unit 150. In the belt cover 152 on the side of the working unit 150, the transmitted power is transmitted through the first pulley 170, the belt 171 and the second pulley 172, and the mowing shaft 175 disposed in the lateral direction below the cover 151. Is transmitted to. A mowing claw 176 is attached to the mowing shaft 175. When the mowing shaft 175 is rotated, the grass on the ground is cut. At this time, the rear roller 159 can be grounded to receive the work implement on the ground.

  The joint 140 connects the first input shaft 115 and the second input shaft 161, and the angle (fold angle) can be changed within a certain angle range by two bent portions 141 and 142 having a joint structure. The central portion 143 can be changed in length by a slide structure. For this reason, power can be transmitted between two shafts (first input shaft 115, second input shaft 161) whose rotational center axes are shifted. The joint 140 may be a power transmission member that can expand and contract by changing the angle, such as a universal joint or a drive shaft.

  Both ends of the first arm 21 and the second arm 22 can be horizontally rotated by the attachment portion 11 provided on the right side (offset movement side) of the mounting portion 10 and the attachment member 30 attached on the working portion 150 side. The fulcrum (21a, 22a, 21b, 22b) is supported. These fulcrums are configured, for example, via an attachment shaft. As a result, a link is formed between the mounting unit 10 and the working unit 150. The attachment member 30 can be attached to, for example, a support member 155 attached to the joint portion 153 located slightly on the left side of the cover 151.

The second arm 22 is disposed on the center side, and the first arm 21 is disposed on the outside. The first arm 21 and the second arm 22 are attached in parallel. The distance between the fulcrums is longer in the second arm 22 than in the first arm 21 . Therefore, the mounting portion side fulcrum 21a of the first arm 21 in the mounting portion 11 of the mounting portion 10 is configured to be closer to the working portion 150 side by a predetermined amount than the mounting portion side fulcrum 22a of the second arm 22. ing. Similarly, the working part side fulcrum 21b of the first arm 21 in the mounting member 30 is also configured to be closer to the mounting part 10 side by a predetermined amount than the working part side fulcrum 22b of the second arm 22.

  The working unit 150 can be offset between S and T by operating the offset cylinder 128 by the link formed by the first arm 21 and the second arm 22. At this time, the second input shaft 161 moves from one direction (left) to the other direction (right) with respect to the first input shaft 115. However, when the working unit 150 is offset to the outside, The bending angle of the joint 140 is tight. Therefore, the working unit 150 can be set to tilt inward at this position.

  When the working unit 150 is moved inward, that is, to the position S in FIG. 1, the working units side fulcrums 21b and 22b of the arms 21 and 22 are inclined inward (left side) with respect to the mounting unit side fulcrums 21a and 22a. The part 150 is located behind the tractor 200 (mounting part 10). At this time, the working unit 150 is oriented in a direction perpendicular to the traveling direction of the tractor 200. In this state, when the tractor 200 is advanced to rotate the PTO of the tractor, the mowing shaft 175 rotates through the first input shaft 115, the joint 140, etc., and the grass can be cut behind the tractor 200. At this time, the mowing shaft 175 is perpendicular to the traveling direction.

  On the other hand, when the working part 150 is moved to the outside, that is, the position T in FIG. 1, the working parts side fulcrums 21b and 22b of the arms 21 and 22 are inclined outward (right side) with respect to the mounting part side fulcrums 21a and 22a. The working unit 150 moves to a position protruding outside (right side) from the tractor 200 (mounting unit 10). At this time, the horizontal direction of the working unit 150 is slightly tilted inward (in the direction of the first input shaft 115) from the right angle with respect to the traveling direction of the tractor 200. This is possible by changing the length of the arms 21 and 22 and adjusting the position of the fulcrum. Thereby, the bending angle B of the joint 140 is more relaxed than the bending angle A (FIG. 4) of the conventional example. In this state, when the tractor 200 is advanced to rotate the PTO of the tractor, the mowing shaft 175 rotates through the first input shaft 115, the joint 140, etc., and the grass located beside the tractor 200 can be cut. it can. At this time, the mowing shaft 175 performs the mowing operation while rotating slightly inward from the direction perpendicular to the traveling direction.

  Further, in this case, the inclination amount α of the working unit 150 with respect to the perpendicular direction can be determined in consideration of the bending angle of the joint and the workability of the working unit, and can be determined in a range of 1 ° to 30 °, for example. . Furthermore, if workability is taken into consideration, 1 ° to 10 ° is a more preferable range.

  As described above, in the first embodiment, the arm can be shortened by offsetting the working unit 150 in one direction while swinging the arms 21 and 22 left and right, and the center of gravity position can be offset without being behind.

  FIG. 3 is a plan view showing the mower according to the second embodiment of the present invention. The mower 2 according to the second embodiment will mainly describe differences from the first embodiment, and the same portions are denoted by the same reference numerals.

  In the mower 2 according to the second embodiment, a mission case 165 is installed near the center of the cover 151 in the working unit 150 ′. Thus, when the working unit 150 ′ is positioned at the center, the first input shaft 115 and the second input shaft 161 are in a substantially linear positional relationship.

  The first arm 26 and the second arm 27 each have a fulcrum pivotable in the horizontal direction on both the attachment portion 16 provided at the center of the mounting portion 15 and the attachment member 35 attached at the center on the working portion 150 ′ side. (26a, 27a, 26b, 27b). These fulcrums are configured, for example, via an attachment shaft. As a result, a link is formed between the mounting portion 15 and the working portion 150 '. In addition, the attachment member 35 can be attached to, for example, a support member 155 attached to the joint portion 153 located at the center of the cover 151.

  The first arm 26 and the second arm 27 are arms having the same length. When the working unit 150 ′ is in the center, the working unit 150 ′ is installed so as to have a “C” shape as a whole with the forward direction as the top. That is, the lateral distance between the mounting portion side fulcrums 26a and 27a is shorter than the lateral distance between the working portion side fulcrums 26b and 27b. The position in the front-rear direction is the same.

  The offset cylinder (not shown) is actuated by the link formed by the first arm 26 and the second arm 27, and the offset movement is performed in both directions with respect to the tractor 200 (mounting portion 15) as shown below. be able to. At this time, in the center position, the joint 140 (simplified illustration) is straight and the bending angle is approximately 0 °. Since the bending angle of the joint 140 becomes large at the position shifted in both directions, the working unit 150 ′ can be set to tilt inward at each position.

  When the working unit 150 ′ is positioned at the center, that is, at V in FIG. 3, the working unit 150 ′ is located behind the tractor 200 (mounting unit 10). At this time, the working unit 150 ′ is oriented in a direction perpendicular to the traveling direction of the tractor 200. In this state, when the tractor 200 is advanced to rotate the PTO of the tractor, the mowing shaft 175 rotates via the first input shaft 115, the joint 140 (not shown), and the grass behind the tractor 200. Can be mowed. At this time, the mowing shaft 175 is perpendicular to the traveling direction.

  On the other hand, when the working unit 150 ′ is moved to the right side, that is, Z in FIG. 3, the working units side fulcrums 26b and 27b are tilted to the right with respect to the mounting unit side fulcrums 26a and 27a. 150 'moves to a position that protrudes to the right from the tractor 200 (mounting portion 15). At this time, the lateral direction of the working unit 150 ′ is slightly tilted inward (in the direction of the first input shaft 115) from a right angle with respect to the traveling direction of the tractor 200. This is made possible by adjusting the position of the fulcrum of the arms 26 and 27 described above. As a result, the bending angle of the joint 140 is reduced and relaxed. In this state, when the tractor 200 is advanced to rotate the PTO of the tractor, the mowing shaft 175 is rotated via the first input shaft 115, the joint 140, etc., and the grass located on the right side of the tractor 200 is mowed. Can do. At this time, the mowing shaft 175 performs the mowing operation while rotating slightly inward from the direction perpendicular to the traveling direction.

  Similarly, when the working unit 150 ′ is moved to the left side, that is, W in FIG. 3, the arms 26 and 27 are inclined so that the working unit side fulcrums 26b and 27b are tilted to the left side with respect to the mounting unit side fulcrums 26a and 27a. The working unit 150 ′ moves to a position that protrudes to the left from the tractor 200 (mounting unit 15). At this time, the horizontal direction of the working unit 150 ′ is slightly inclined to the inner side (the first input shaft 115 side) from the right angle with respect to the traveling direction of the tractor 200. Thereby, the bend angle of the joint 140 is relaxed, and the mowing work becomes possible.

  In this case, the inclination amount β with respect to the perpendicular direction of the working part 150 ′ is the same as that in the first embodiment, and can be determined in consideration of the bending angle of the joint and the workability of the working part. It can be determined in the range of °. Furthermore, if workability is taken into consideration, 1 ° to 10 ° is a more preferable range.

  Thus, in Example 2, it is possible to offset the positions on both the left and right outer sides, and the mowing operation can be performed by relaxing the bending angle of the joints at both positions.

  As described above, according to the first and second embodiments, in the present invention, when the working part is offset and moved outward, the working part moves so as to be inclined inward, so that the bending angle of the joint can be small. This reduces vibration and increases durability even when working outside. Moreover, since the center of gravity of the mower approaches the front side in the direction of tractor travel, the weight balance is improved.

10, 15, 110 Mounting portion 11, 16 Mounting portion 21, 26 First arm 22, 27 Second arm 30, 35, 130 Mounting member 115 First input shaft 120, 125 Arm 128 Offset cylinder 140 Joint 150, 150 'Work Part 151 Cover 161 Second input shaft 175 Mowing shaft

Claims (4)

In a mower that is attached to a tractor and performs mowing work,
Performing a mounting portion which is attached to the tractor to have a first input shaft for inputting power from the tractor, the motive power transmitted from the second input shaft has a second input shaft rotates the mowing shaft mowing A working part, a link part that connects the mounting part and the working part so that they can be offset, and the first input shaft and the second input shaft are connected to transmit power to change the angle and expand and contract in the middle. A power transmission member,
Before SL linking section, it constitutes the working portion so as to state that the working portion is inclined to the first input axis when is offset moving laterally outwardly from the position behind the mounting portion, The bending angle of the power transmission member at this time is made smaller than in the case where the working unit is not inclined ,
The mowing machine is capable of performing mowing work at any position between a position behind the mounting portion and a position offset laterally outward . The mower according to claim 1,
The mowing machine is characterized in that an angle at which the working unit is inclined in the first input axis direction is in a range of 1 ° to 30 °. In the mower according to claim 1 or claim 2,
The link part is formed by two arms supported by a fulcrum pivotable in the horizontal direction on the mounting part side and the working part side, respectively. The arms are arranged in parallel, and the length of one arm is A mower characterized by its long length. In the mower according to claim 1 or claim 2,
The link part is formed by two arms supported by fulcrum pivotable in the horizontal direction on the mounting part side and the working part side, respectively.
The mower is characterized in that the arms have the same length, and the distance between fulcrums on the mounting portion side is shorter than the distance between fulcrums on the working portion side.

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