JP3997228B2 - Mower - Google Patents

Description

  The present invention relates to a grass mower, and more particularly, to a handle for improving the operability of the mower and a support structure thereof.

2. Description of the Related Art Conventionally, walking type mowers are known for mowing grass and farm roads. For example, in Japanese Patent Application Laid-Open No. 10-210838, in order to improve workability on a narrow saddle, a cutting blade is disposed at the front of a wide traveling wheel, and an engine is disposed at the rear of the traveling wheel. A handle was placed above.
JP-A-10-210838

  In the prior art, the handle is configured to be rotatable left and right so that mowing can be performed from the side. However, because the handle does not expand and contract, even if it can be rotated up and down, if a tall person works, if the handle is raised and turned, the rear part of the engine will be kicked during walking. When it is difficult to walk, or when mowing the reed grass, if the sloping surface of the reed is long, the operator must reach out from the top of the reed to work when reclaiming the lower side of the reed surface. Therefore, the operator bends and stretches his / her hand to carry out the work, and the work is not easy to perform. In addition, since the pivot fulcrum of the handle is located on the rear side of the airframe, there is a problem that the airframe tends to flow downward on an inclined ground.

The above is the problem to be solved by the present invention. Next, means for solving the problem will be described.
The engine 4 and the drive wheels 3 and 3 are arranged at the rear part of the fuselage frame 1, the stabilizer wheel 2 is arranged at the front part of the fuselage frame 1, and the cutting part 9 is arranged between the drive wheel 3 and 3 and the stabilizer wheel 2. In the mowing machine in which the handle 8 that can rotate in the horizontal direction is arranged on the machine frame 1, the handle slide box 5 that constitutes the pivot point of the handle 8 in the horizontal direction is placed in front of the center position of the cutting unit 9. The handle slide box 5 is disposed on the frame 1 so as to be slidable in the front-rear direction on the body frame 1.

Since the present invention is configured as described above, the following effects can be obtained.
The engine 4 and the drive wheels 3 and 3 are arranged at the rear part of the fuselage frame 1, the stabilizer wheel 2 is arranged at the front part of the fuselage frame 1, and the cutting part 9 is arranged between the drive wheel 3 and 3 and the stabilizer wheel 2. In the mower having the handle 8 that can rotate in the horizontal direction in the machine frame 1, the handle slide box 5 that constitutes the pivot point of the handle in the horizontal direction is placed in front of the center position of the cutting unit 9. Since the handle slide box 5 is slidable in the front-rear direction on the machine body frame 1 when the cutting operation is performed on an inclined ground or the like, the machine body does not flow downward and is stable. Work can be done.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.
1 is a side view of the whole of a grass mower, FIG. 2 is a plan view of the same, FIG. 3 is a plan view of the grass mower with the handle rotated to the side of the machine, and FIG. FIG. 5 is a diagram showing a fixed state of the handle telescopic fixing lever, FIG. 6 is a diagram showing the inside of the handle and the lever box, FIGS. 7 and 8 are diagrams showing the inside of the lever box when the engine control lever is operated, 9 is a side view showing the rotation and rotation fulcrum part of the handle, and FIG. 10 is a side view showing the rotation and rotation fulcrum part in a state where the handle is rotated to the side of the machine body.

  First, an overall schematic configuration will be described with reference to FIGS. 1 and 2. The body frame 1 is arranged in the front-rear direction of the body, and the drive transmission pipe 11 is horizontally mounted in the left-right direction of the body at the rear end of the body frame 1, and the drive wheel cases 30 and 30 are rearwardly lowered at the left and right ends of the drive transmission pipe 11. The drive wheels 3 and 3 are pivotally supported at the lower ends of the drive wheel cases 30 and 30, respectively. Further, the output shaft of the engine 4 is arranged in the vertical direction, and the output shaft is inserted into the engine power drive case 41 arranged at the lower part thereof, and the engine power drive case 41 extends forward of the body, A deceleration box 43 is disposed on the front portion and connected to the body frame 1.

  The front end of the engine power drive case 41 is connected to a cutting transmission case 42, and a cutting unit 9 is disposed below the cutting transmission case 42. The cutting unit 9 houses cutting blades 91 and 91 made of blade blades or disk blades on the left and right in the cutting unit cover 92, and the rotational trajectory of the cutting blades 91 and 91 is shifted up and down so as to partially wrap. The mowing holders 90 and 90 that support the cutting blades 91 and 91 and the transmission shaft in the cutting transmission case 42 are coupled to each other by a chain or the like so as to transmit power.

  The power from the engine 4 rotates the left and right drive wheels 3 and 3 through the engine power drive case 41, the deceleration box 43, the drive transmission pipe 11, and the drive transmission system in the drive wheel case 30, and the engine Is driven to rotate the cutting blades 91 and 91 of the cutting unit 9 via the drive transmission system in the engine power driving case 41, the deceleration box 43, and the cutting transmission case 42.

  Further, a front wheel support holder 22 having a substantially cylindrical shape is provided at the front end of the body frame 1, a front wheel support pipe 20 is inserted into the front wheel support holder 22 in the vertical direction, and a front wheel rotating shaft is inserted into the front wheel support pipe 20. 23 is inserted. A front wheel frame 24 is provided at the lower end of the front wheel rotation shaft 23, and the front wheel 2 serving as a stable wheel is rotatably supported on the front wheel frame 24.

  A front wheel support pipe 20 is fitted into the front wheel support holder 22 so as to be slidable in the vertical direction. The front wheel support pipe 20 can be fixed by a vertical fixing handle 21. The height can be changed by work. The front wheel rotation shaft 23 is rotatable about the vertical direction in the front wheel support pipe 20. A recess 23 a is formed in the upper rear surface of the front wheel rotation shaft 23, and a knob 61 described later is provided in the recess. It can be inserted.

  In addition, a handle slide box 5 is fitted in front of the center position in the front-rear direction of the machine body frame 1 (in front of the cutting unit 9), and a slide fixture 51 is provided on the side of the handle slide box 5. The position of the handle 8 can be adjusted in the front-rear direction by loosening the slide fixture 51 and sliding the handle slide box 5 in the front-rear direction on the body frame 1. A left and right rotation fulcrum shaft 6 projects upward on the handle slide box 5, and a pipe-like handle base 17 is rotatably fitted on the left and right rotation fulcrum shaft 6 so that the handle 8 can be rotated in the horizontal direction. It is said. Further, a vertical rotation fulcrum shaft 7 is disposed in a horizontal direction in the front portion of the handle base 17, and a front end of a handle 8 is pivotally supported on the vertical rotation fulcrum shaft 7, and the vertical rotation fulcrum shaft 7 is centered. The handle 8 can be freely rotated in the vertical direction.

  As shown in FIG. 9, a cylinder 19 is fixed to the rear surface of the handle base 17 in the vertical direction, and a rotation stopper pin 65 is slidably inserted into the cylinder 19. A spring (not shown) is inserted into the upper portion of the wire and biased so as to protrude downward, and the upper end is connected to a wire 66 described later. The lower end of the rotation stopper pin 65 can be inserted into a fixing hole 5b drilled in a restriction disk 5a fixed to the upper portion of the slide box 5. The fixing hole 5b is centered on the left and right rotation fulcrum shaft 6. In the same radius, a plurality of holes are formed at predetermined intervals on the restriction disk 5a in accordance with the position of the rotation stopper pin 65.

  Further, a handle vertical fixing tool 70 is fixed to the rear surface of the cylinder 19, and the rear surface of the handle vertical fixing tool 70 is configured as an arc-shaped surface centering on the vertical rotation fulcrum shaft 7, on this surface. Fixing holes 70b, 70b... Are formed at regular intervals in the vertical direction. On the other hand, a cylinder 73 is fixed to the front lower part of the handle 8, and an upper and lower stopper pin 71 is accommodated in the cylinder 73. The stopper pin 71 is biased by a spring so as to protrude downward. The rear end is connected to the wire 72, and the front end is inserted into the fixing hole 70b so that the turning height of the handle 8 can be adjusted.

  Next, the configuration and operation method of the handle 8 of the present invention will be described in detail with reference to FIGS. As described above, the handle 8 can be rotated in the horizontal direction on the handle slide box 5 and can be rotated in the vertical direction, and can be moved in the front-rear direction on the body frame 1 together with the handle slide box 5. It is said. The handle 8 of the present invention can be further expanded and contracted in the longitudinal direction of the handle 8 as shown in FIGS. That is, the longitudinal portion of the handle 8 includes a handle inner 80 that is an insertion portion and a handle holder 81 that is a cylindrical portion, and the handle inner 80 is inserted into the cylindrical handle holder 81.

  As shown in FIG. 4, a fixing portion is disposed between the handle inner 80 and the handle holder 81. In this embodiment, the telescopic fixing lever 82 is centered on the rotation fulcrum shaft 82c on the rear end side of the handle holder 81. A cam portion 82a is formed at the lower end of the handle boulder 81, and a spring 82b is wound around the rotation fulcrum shaft 82c. One end of the cam 82a is locked to the handle holder 81 side. The other end is engaged with the expansion / contraction fixing lever 82 and urged to press the expansion / contraction fixing lever 82 against the handle holder 81 side by the spring force of the spring 82b.

  On the other hand, the handle holder 81 is provided with a fixing hole 81a for expansion and contraction fixing. When the expansion and contraction fixing lever 82 is rotated toward the handle holder 81, the cam portion 82a is inserted into the handle holder 81 from the fixing hole 81a. And is pressed against a handle inner 80 inserted in the handle holder 81 so that the position of the handle inner 80 relative to the handle holder 81 is fixed.

  In the handle 8 configured as described above, when the handle 8 is expanded and contracted, as shown in FIG. 4, the expansion / contraction fixing lever 82 is rotated upward to remove the cam portion 82a from the fixing hole 81a of the handle holder 81, The pressing force against the handle inner 80 is released. Then, the handle inner 80 is slid in the handle holder 81, an appropriate position is determined, the expansion / contraction fixing lever 82 is rotated again as shown in FIG. 5, and the cam portion 82a is pressed against the handle inner 80. The handle inner 80 and the handle holder 81 are fixed, and the telescopic fixing lever 82 is maintained at the fixed position by the tension of the spring 82b.

  Thus, since the handle 8 of the present invention can be extended and contracted, an appropriate handle length can be selected according to the work place. By adjusting the length to a sufficiently extended length, the operator can perform a mowing work with an unreasonable posture while being positioned at the upper part of the heel, and the working efficiency is remarkably improved.

  Further, as described above, the handle 8 can be moved in the front-rear direction in the handle slide box 5, but the arrangement is configured to come forward from the center position of the cutting portion 9. When the cutting operation is performed, the airframe does not flow downward and can perform a stable operation.

  Next, the configuration of various levers disposed in the gripping portion 83 of the handle 8 will be described with reference to FIGS. As described above, the handle gripping portion 83 is disposed at the rear end of the handle inner 80 of the handle 8. Inside the lever box 100 provided in the handle gripping portion 83, engine control and rotation and rotation of the handle 8 are performed. A lever or the like for performing an operation is provided. As shown in FIG. 6, a guide lever fulcrum 106a is provided substantially at the center in the lever box 100, and one ends of the left and right guide levers 106L and 106R are pivotally supported by the guide lever fulcrum 106a. Guide rollers 107 and 107 are rotatably supported on the other end of 106R, and an engine control lever 101 and a handle control lever 102 extend from the ends.

  One ends of springs 101a and 102a are locked to the base portions of the engine control lever 101 and the handle control lever 102, respectively, and the other ends of the springs 101a and 102a are locked to the lever box 100 side. 102 is urged forward (leftward in FIG. 6), and the lever stoppers 101b and 102b regulate the forward rotation of both control levers 101 and 102. Further, one ends of the left and right fixed lever stoppers 103 and 104 are pivotally supported on the guide lever fulcrum 106a, and the springs are respectively suspended over the other ends of the fixed lever stoppers 103 and 104 and the lever box 100 side. Both fixed lever stoppers 103 and 104 are urged forward (left side in FIG. 6) by 103a and 104a, and forward rotation is restricted by the stoppers 103c and 104c.

  Further, a recoil box 105 is disposed on the rear side of the guide lever fulcrum 106 a, and wires 108 and 109 are retracted and accommodated in the recoil box 105. The middle portions of the wires 108 and 109 are guided by guide rollers 107 and 107 provided at one ends of the lever box 100 and the guide levers 106L and 106R, respectively, and extend forward in the handle inner 80. .

  On the other hand, the center portions of the guide levers 110 and 111 are also supported on the front end side of the handle holder 81 so as to be rotatable about the fulcrums 110a and 111a, respectively, and protrude leftward and rightward. One end of the wires 108 and 109 is locked to one end in the handle holder 81. Then, the wires 112 and 113 are locked at the other ends of the guide levers 110 and 111, respectively, and the other end of the wire 112 is connected to the throttle of the engine 4, and the other side of the wire 113 is as shown in FIG. The wires 66 and 72 are branched and connected to the rotation stopper pin 65 and the upper and lower stopper pins 71, respectively.

  In the handle 8 configured as described above, when the operator pulls the engine control lever 101 in the right direction in FIG. 6, the guide lever 106R is rotated, and the wire 108 is a guide roller 107 provided at one end of the guide lever 106R. Glide on the top. Then, as shown in FIG. 7, the guide lever 106R rotates and contacts the protrusion 103b of the fixed lever stopper 103 disposed slightly behind the guide lever 106R. When the engine control lever 101 is further pulled backward against the tension of the springs 101a and 103a, the wire 108 is held between the guide roller 107 and the protrusion 103b of the fixed lever stopper 103 as shown in FIG. Pulled backwards.

  As a result, the wire 108 is pulled rearward without being pulled out of the recoil box 105. Therefore, the guide lever 110 provided at the front end of the handle holder 81 is pulled by the wire 108 and rotates as shown in FIG. The engine speed can be increased by pulling 112 forward.

  Similarly, when the handle control lever 102 is pulled backward by the operator, the wire 109 is held between the guide roller 107 and the protrusion 104b of the fixed lever stopper 104, and the tension of the springs 102a and 104a is reduced. The wire 109 is pulled further backwards, and the wire 109 rotates the guide lever 111 and pulls the wire 113 forward.

  Then, as shown in FIG. 9, the wire 113 is branched into wires 66 and 72, and the rotation stopper pin 65 and the stopper pin 71 are pulled to release from the fixing holes 5b and 70b. Thus, the handle 8 can be freely rotated in the horizontal direction and turned up and down while the operator pulls the handle control lever 102.

  Since the handle 8 of the present invention is configured as described above, the engine speed control and the up / down / left / right rotation operation of the handle 8 can be performed in the vicinity of the grip portion 83 of the handle 8, so that the machine is positioned on an inclined ground or the like. Even in this case, since the operator can perform the above operation at the hand of the handle 8 without moving to the machine, the operability is improved and the work efficiency is improved. However, it is also possible to provide separate levers for controlling the engine speed and for turning the handle 8 up, down, left and right, and to operate them individually. Also, it can be gear-shaped instead of the fixing hole for fixing the handle, it can also be lever-shaped instead of the pin, and a clutch or the like can also be used The fixing structure is not limited.

  Finally, the left / right rotation restricting mechanism of the front wheel 2 when the handle 8 is rotated left / right will be described with reference to FIGS. 9 and 10. As described above, the handle 8 is horizontally rotatable around the left / right rotation fulcrum shaft 6. A member for detecting the left-right rotation of the handle 8 is disposed on the handle base 17. In this embodiment, the detection member is provided with a restriction notch 17a at the front lower portion of the handle base 17, a cylinder 63 is fixed on the restriction disk 5a, and a knob 62 is accommodated in the cylinder 63. Is in contact with the restriction notch 17a while being urged by the spring 62a. The restriction notch 17a is provided on the front side of the body of the left / right rotation fulcrum shaft 6 in a state where the handle 8 is rotated rearward with respect to the body, and the restriction notch 17a has a semicircular shape in plan view. Therefore, the knob 62 is pushed by the rotation of the handle 8 and pushed out from the handle base 17.

  The front wheel support pipe 20 is provided with a left and right rotation fixing member for the front wheel 2. In this embodiment, a cylinder 64 is fixed to the rear surface of the front wheel support pipe 20, a knob 61 is housed in the cylinder 64, and the knob 61 passes through the front wheel support pipe 20 and is urged by a spring 61a. Thus, it can be inserted into the restriction hole 23a. A wire 60 is connected between the rear surface of the knob 61 and the front surface of the knob 62. The restriction hole 23a is formed in the rear surface when the front wheel 2 faces in the front-rear direction. Further, the urging force of the spring 61a is smaller than the urging force of the stopper 62a. Further, the wire 60 is covered with a harness so that the positional relationship of the pins does not collapse even when the slide box 5 is moved back and forth.

  In the above configuration, when the handle 8 is rotated to the rear side of the machine body, the tip of the knob 62 comes into contact with the notch 17a and pulls the knob 61 through the wire 60, and the front end of the knob 61 is a restriction hole. It is released from 23a. As a result, there is no restriction on the front wheel rotation shaft 23 by the knob 61, and the front wheel rotation shaft 23 can rotate within the front wheel support pipe 20, whereby the front wheel 2 can rotate in the left-right direction.

  Further, in a state where the handle 8 is rotated forward or left and right of the machine body, the handle base 17 is rotated as shown in FIG. 10, the restriction notch 17a is also rotated, and the knob 62 is restricted to the restriction notch 17a. Accordingly, the knob 61 is pressed forward by the spring force of the spring 61a by the wire 60, and is inserted into the restriction hole 23a, so that the front wheel support pipe 20 and the front wheel rotating shaft 23 are connected to the knob 61. Fixed by. As a result, the front wheel rotation shaft 23 becomes non-rotatable and the front wheel 2 is fixed in a state in which the front wheel 2 is maintained in substantially the same direction as the longitudinal direction of the machine body.

  Since the front-wheel left / right rotation restriction of the present invention is configured as described above, the front wheel 2 can freely rotate in the left-right direction when an operator works with the handle 8 being rotated rearward. As a result, steering is easy and operability is improved. And, for example, when an operator is located at the upper part of the kite and works the machine on the slope of the kite, the handle 8 may be rotated to the side of the machine as shown in FIG. In this case, since the front wheel 2 is fixed in the traveling direction of the machine, stable work can be performed without meandering on the slope and tilting the machine below the slope. However, a link or the like can be used instead of the knob and the wire, and the knob 61 is arranged on the front wheel support pipe 20 to be connected to the wire, and when the handle base portion 17 is rotated, the wire is pulled to pull the knob into the restriction hole. It is also possible to configure so as to be pushed into 23a, and the fixing structure is not limited. In addition, a solenoid or the like can be used instead of the cylinder, the pin, and the knob, and the piston and the solenoid can be driven by electrical detection.

  In a mower having an engine, a cutting part, a stabilizing wheel, and a driving wheel arranged in a body frame and having a handle that is pivoted horizontally and vertically from the body frame, the handle is attached to the tubular part and the tubular part. It is composed of an insertion part to be inserted, and a fixed part is arranged between the cylindrical part and the insertion part so that it can be fixed at an arbitrary length. For example, even when performing mowing work on a long slope with a sloping surface, by adjusting the handle sufficiently extended, the operator can keep the position at the top of the fence with a reasonable posture. Harvesting work becomes possible, and work efficiency is greatly improved.

  In addition, an operation lever that adjusts the number of rotations of the mower engine and an operation lever that enables the handle to rotate in the horizontal and vertical directions are disposed on the handle side. You can adjust the engine speed and rotate the handle nozzle left and right and up and down while keeping the posture to hold and work, especially when the machine is located on a sloping ground etc. Since operation can be performed at the hand of the handle without moving to this machine, operability is improved and work efficiency is improved.

  In addition, the engine and drive wheels are placed at the rear of the fuselage frame, a stable wheel is placed at the front of the fuselage frame so that it can be rotated to the left and right, a cutting part is placed between the drive wheel and the stable wheel, and the aircraft frame rotates horizontally A mower having a handle that is capable of being provided, wherein a rotation fixing member is provided on a left and right rotation support portion of the stabilizing wheel, and a member that detects rotation of the handle in the front-rear direction is provided on a handle rotation base portion. The movement fixing member and the rotation detection member are connected, and when the handle is rotated in the left-right direction of the machine, the stabilizer is configured to be fixed in substantially the same direction as the advancing direction of the machine. When working with the handle rotated to the rear side, the stabilizer wheel is free to rotate in the left-right direction, improving operability.For example, the operator is positioned at the top of the heel, When working on the slope of a fence Since stable wheels are fixed to the traveling direction of the machine, without the machine tilts downward slope meandering in slope, but they can stable work.

1 is an overall side view of a mowing machine. It is a top view of a moth-mower. It is a top view of the hoe mower which shows the state which rotated the handle | steering-wheel side. It is a figure which shows the cancellation | release state of a handle expansion-contraction fixing lever. It is a figure which shows the fixed state of a handle expansion-contraction fixing lever. It is a figure which shows the inside of a handle and a lever box. It is a figure which shows the inside of a lever box at the time of engine control lever operation. It is a figure which shows the inside of a lever box at the time of engine control lever operation. It is a side view which shows the rotation and rotation fulcrum part of a handle. It is a side view which shows the rotation and rotation fulcrum part of the state which the handle | steering-wheel rotated to the body side.

Explanation of symbols

2 Front wheels (stabilized wheels)
5 Handle slide box 6 Handle rotation fulcrum shaft 7 Handle rotation fulcrum shaft 8 Handle 9 Cutting part 20 Front wheel support pipe 23 Front wheel rotation shaft 80 Handle inner 81 Handle holder 82 Telescopic fixing lever 83 (Handle) gripping part

Claims (1)

The engine 4 and the drive wheels 3 and 3 are arranged at the rear part of the fuselage frame 1, the stabilizer wheel 2 is arranged at the front part of the fuselage frame 1, and the cutting part 9 is arranged between the drive wheel 3 and 3 and the stabilizer wheel 2. In the mower which arranges the handle 8 which can be rotated in the horizontal direction on the fuselage frame 1,
A handle slide box 5 that constitutes a fulcrum for turning the handle 8 in the horizontal direction is arranged on the body frame 1 in front of the center position of the cutting portion 9, and the handle slide box 5 is placed on the body frame 1. A mowing machine characterized by being slidable in the front-rear direction.

Images