JP5111942B2 - Walking type work machine - Google Patents

Description

  The present invention relates to a walking work machine including a tilling device and wheels.

Conventionally, a wheel is pivotally attached to the base of a handle that extends upwardly behind the tillage device, and is used when moving, while providing resistance to the traction force of the tillage device with the wheel during tillage work, and its rotation 2. Description of the Related Art A walking work machine that can adjust the amount of tillage by changing the position is known (for example, see Patent Document 1).
JP 2003-111502 A

  In the walking type work machine as described above, it is not necessary to attach or remove the wheel during the movement, and it is possible to easily shift from the working state to the moving state or vice versa. However, since the wheel is configured to be rotatable at the time of work, the wheel cannot sufficiently provide resistance to the traction force of the tillage device, and workability may be reduced.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In claim 1, an engine (3), a transmission (5), and a tilling device (4) are provided at the front of the machine body, and a wheel (8) is attached to the rear part of the machine so that the vertical position can be adjusted, and the wheel (8) rotates. In the walking type work machine (1) provided with the rotation resistance applying means (40) capable of applying resistance, the handle (10) extending rearward of the machine body is constituted by a collar part (12) and a grip part (11). Then, the grip portion (11) is configured in a loop shape arranged in the left-right direction, and along the bent portion of the loop-shaped grip portion (11), a vertically bent vertical operation portion (15a) and a horizontal A deadman type left and right clutch lever (15, 15) provided with an operation part (15b) is provided, and the clutch of the transmission (5) is connected by grasping the clutch lever (15) together with the grip part (11), The engine (3) The tilling device (4) can be driven, and conversely, the clutch is disengaged by releasing the clutch lever (15), and the tilling device (4) is stopped. The left and right clutch levers (15, 15) Connected to the left and right ends of the rod (21) extending in the left and right direction at the front end of the vertical operation section (15a), and the clutch lever (15, 15) is operated from the left side or the right side of the machine body. Thus, the clutch of the transmission (5) can be operated, and the rotational resistance applying means (40) attached to the rear part of the walking work machine (1) is attached to the wheel (8) by the brake cam (41). When the clutch lever (15) is interlocked with the brake cam (41) and the clutch lever (15) is gripped and connected to the clutch, the rotation resistance is applied to make the rotation impossible. Sometimes, and applies rotational resistance to the wheels (8) in the brake cam (41) is unable to rotate, the one that confers resistance to traction of the plow (4).

  As effects of the present invention, the following effects can be obtained.

In claim 1, an engine (3), a transmission (5), and a tilling device (4) are provided at the front of the machine body, and a wheel (8) is attached to the rear part of the machine so that the vertical position can be adjusted, and the wheel (8) rotates. In the walking type work machine (1) provided with the rotation resistance applying means (40) capable of applying resistance, the handle (10) extending rearward of the machine body is constituted by a collar part (12) and a grip part (11). Then, the grip portion (11) is configured in a loop shape arranged in the left-right direction, and along the bent portion of the loop-shaped grip portion (11), a vertically bent vertical operation portion (15a) and a horizontal A deadman type left and right clutch lever (15, 15) provided with an operation part (15b) is provided, and the clutch of the transmission (5) is connected by grasping the clutch lever (15) together with the grip part (11), The engine (3) The tilling device (4) can be driven, and conversely, the clutch is disengaged by releasing the clutch lever (15), and the tilling device (4) is stopped. The left and right clutch levers (15, 15) Connected to the left and right ends of the rod (21) extending in the left and right direction at the front end of the vertical operation section (15a), and the clutch lever (15, 15) is operated from the left side or the right side of the machine body. Thus, the clutch of the transmission (5) can be operated, and the rotational resistance applying means (40) attached to the rear part of the walking work machine (1) is attached to the wheel (8) by the brake cam (41). When the clutch lever (15) is interlocked with the brake cam (41) and the clutch lever (15) is gripped and connected to the clutch, the rotation resistance is applied to make the rotation impossible. Sometimes, the grant with the brake cam (41) a rotational resistance to the wheel (8) is unable to rotate, since giving the resistance to traction of the plow (4), the rotational resistance to the wheel by the rotation resistance applying means It is possible to give a sufficient resistance force to the traction force of the tilling device with the wheels, and to perform the tilling work without removing the wheels, thereby improving workability.

  Further, by canceling the application of the rotational resistance to the wheel, the body can be easily moved using the wheel. In addition, the aircraft can be stabilized and operated and moved.

  Further, it becomes possible to remotely control the application of the rotational resistance to the wheel by the rotational resistance applying means and the release thereof, and from the working state to the moving state without attaching or removing the wheel during the operation, or Conversely, the transition from the moving state to the working state can be performed smoothly.

  Next, embodiments of the invention will be described.

  FIG. 1 is a side view of a walking type working machine according to an embodiment of the present invention.

  FIG. 2 is a plan view of a walking type working machine according to an embodiment of the present invention, and FIG. 3 is a plan view of a handle gripping portion.

  FIG. 4 is a partial cross-sectional side view of the wheel mounting portion, and FIG. 5 is a rear view of the wheel mounting portion.

  First, a schematic configuration of the walking management machine 1 according to an embodiment of the present invention will be described.

  As shown in FIG. 1 and FIG. 2, the walking type management machine 1 is provided with a rotary tiller 4 having an engine 3 mounted on a body frame 2 and having a plurality of tilling claws 4 a below the body frame 2. . A transmission 5 is provided between the engine 3 and the rotary tiller 4, and the engine 3 and the rotary tiller 4 are linked to each other by the transmission 5.

  A pair of left and right wheels 8 are attached to the rear end of the body frame 2 so that the vertical position can be adjusted. These left and right wheels 8 can be imparted with rotational resistance, and at the time of tillage work, the wheels 8 are made non-rotatable and inserted into the soil so as to give resistance to the traction force of the rotary tiller 4. And the amount of tilling can be arbitrarily set by adjusting the up-and-down position of the right and left wheels 8.

  A handle 10 is provided at the rear part of the machine body frame 2 so as to extend rearward and upward, and a loop-shaped gripping part 11 is provided on the rear side of the handle 10. A deadman clutch lever 15 is provided in the vicinity of the grip portion 11 of the handle 10, and the clutch lever 15 enables connection / disconnection of a clutch provided in the transmission 5 (or in the belt case).

  That is, by grasping the clutch lever 15 together with the grip portion 11, the clutch of the transmission 5 is connected, the driving force is transmitted from the engine 3, and the rotary tiller 4 is driven. On the contrary, by releasing the clutch lever 15, the clutch is disconnected, the transmission of the driving force is cut off, and the rotary tiller 4 is stopped.

  Next, the configuration of the handle 10 will be described in detail.

  The handle 10 includes a gripping part 11 and a hook part 12, and the hook part 12 is obliquely installed at the rear end part of the body frame 2 at the front low and rear height, and the grip part 11 is provided at the rear upper end of the hook part 12. Are connected in a substantially horizontal direction, and are formed in a generally letter shape in side view. The grip portion 11 is covered with a non-slip member 13 made of rubber or synthetic resin except for the left and right center of the rear portion so that it can be firmly gripped. In addition, it becomes possible to hold | maintain more reliably by coat | covering the operation parts 15a * 15b of the clutch lever 15 mentioned later with a non-slip | skid member.

  In the handle 10, the collar portion 12 is configured to be rotatable about a left and right axis at a middle portion in the vertical direction, and the grip portion 11 connected to the collar portion 12 is rotated forward or downward about the rotation fulcrum 16. By doing so, it is possible to fold it to the body side or to adjust the height of the handle 10. The rotation fulcrum 16 is provided with fixing means such as a set screw 17 with a handle so that the grip portion 11 can be fixed at an arbitrary rotation position.

  The grip portion 11 is formed in a substantially three-letter shape in plan view, and is configured in a loop shape so that the left and right end portions that curve inward of the fuselage are connected to the rear end of the flange portion 12 so that the opening direction is substantially vertical. is doing. In this gripping part 11, an L-shaped bent part that bends from the gripping part outer side to the inner side is provided on both left and right sides of the rear part, and the gripping part outer side extending rearward (front-rear direction) from the collar part 12 side is defined as a vertical gripping position 11a The gripping portion inner side extending in the substantially orthogonal direction (left-right direction) from the rear end of the vertical gripping position 11a is set as the lateral gripping positions 11b and 11b.

  Immediately before the vertical gripping position 11a on the left and right sides, an accelerator lever 18 for adjusting the rotational speed of the tillage claw 4a of the rotary tiller 4 by adjusting the rotational speed of the engine 3 is provided to grip the vertical gripping position 11a. It can be operated with just your fingertips. A recess 11c that is recessed forward of the machine body is formed between the horizontal gripping positions 11b provided on the left and right sides, that is, in the vicinity of the rear left and right center of the gripping part 11, and a stop button 19 that stops the engine 3 is provided in the recess 11c. In an emergency, it can be operated by contact with the operator's body.

  Further, the clutch lever 15 is provided in the vicinity of the bent portion formed by the vertical gripping position and the lateral gripping position on both the left and right sides. The clutch lever 15 is bent in an L shape in plan view along the shape below the bent portion, and a longitudinal operation portion 15a extending in the front-rear direction on one side of the bent portion is laterally extended in the left-right direction on the other side. An operation unit 15b is provided. The vertical operation unit 15a is arranged so as to overlap the vertical holding position 11a and the horizontal operation unit 15b in a plan view, and the holding positions 11a and 11b facing the respective operation units 15a and 15b are arranged. It can be gripped at the same time.

  The left and right clutch levers 15 are arranged on the left and right sides of the recess 11c of the gripping part 11 with a predetermined interval between them, and are connected to the left and right ends of the rod 21 extending in the left and right direction at the front end of the vertical operation part 15a. ing. The rod 21 is curved along its shape below the front side of the gripping part 11, and is supported on the rear upper end of the collar part 12 so as to be rotatable about a left and right axis around the center of the left and right sides. Can be swung in a direction (vertical direction) in which it is moved closer to or away from the grip portion 11.

  One end of a wire 23 is connected to the rod 21 via a connecting piece 22, and the other end of the wire 23 is connected to a clutch provided in the transmission 5, thereby interlockingly connecting the clutch lever 15 and the clutch. Then, the clutch is connected by holding either the left or right clutch lever 15 simultaneously with the vertical gripping position 11a located outside the gripping part 11 or the horizontal gripping position 11b located behind the gripping part 11, and conversely It is made to cut by releasing.

  Here, the connecting piece 22 is disposed and protected in the rear end (in the cover) of the flange portion 12 and is disposed in the center of the left and right to hold the left or right clutch lever 15 so that the wire 23 has the same length. So that you can pull. Therefore, compared to the conventional structure in which the left and right levers are connected with a connecting rod and connected to one end of the wire on one side, the working length is not shortened and the number of parts can be reduced, so that it does not get in the way. ing.

  Thus, when the clutch lever 15 is operated, the vertical operation unit 15a is grasped together with the vertical gripping position 11a of the gripping unit 11, thereby facilitating the posture control of the aircraft by balancing the left and right while performing the tilling work, It is possible to steer from the side while offset to the left and right sides of the aircraft. On the other hand, by grasping the lateral operation part 15b together with the lateral gripping position 11b of the gripping part 11, it is possible to facilitate pushing and pulling of the airframe or to steer from the rear with the attitude of the airframe stabilized during tillage work. It is said.

  As described above, in the walking work machine 1 in which the handle 10 extending to the rear side of the machine body is provided with the loop-shaped gripping part 11, at least one side of the gripping part 11 of the handle 10 is bent from the outside of the machine body to the inside. A bent portion (vertical gripping position 11a and lateral gripping position 11b) is formed, a clutch lever 15 bent along the bent portion is provided in the vicinity of the bent portion, and the gripping portions are provided on both sides of the clutch lever 15 bent. 11 and the operation portions 15a and 15b that can be gripped, the grip portion 11 and the clutch lever 15 can be gripped in an easy maneuvering posture from the rear or the side of the machine according to the state of the field or work. Become. For example, the grip portion 11 can be firmly gripped from the rear of the machine body in a hard farm field or sloping ground, and the grip section 11 can be gripped from the side of the machine body when it is not desired to step on the soft farm field or tillage. Therefore, it is possible to perform stable work without imposing an excessive burden on the operator.

  Further, in the walking work machine 1, the clutch lever 15 is provided on both the left and right sides of the grip portion 11 of the handle 10, and the left and right clutch levers 15 are interlocked and connected to each other. The clutch can be operated simply by grasping. Therefore, the maneuvering can be performed from the left side or the right side of the aircraft, and the workability can be improved.

  Further, in the walking type work machine 1, since the gripping portion 11 of the handle 10 is covered with the anti-slip member 13, the gripping portion 11 of the handle 10 can be firmly gripped and operated.

  Next, the configuration of the wheel 8 will be described in detail.

  As shown in FIGS. 4 and 5, the left and right wheels 8 are attached to a mounting plate 29 fixed to the rear end portion of the body frame 2 via a support member 30. The support member 30 is composed of left and right support arms 31 and connecting bars 32. Each support arm 31 extends in the vertical direction, and the upper ends of both support arms 31 are connected by the connecting bars 32 so as to have a substantially gate shape in a rear view. Is formed.

  The support member 30 is disposed obliquely behind the rotary tiller 4 in front and rear, and supports the left and right wheels 8 rotatably on the lower end side of the support arm 31. In the present embodiment, the wheels 8 are arranged on the left and right sides as a pair of left and right, but may be arranged at the center of the left and right, for example.

  A support stay 33 is provided near the left and right center of the connecting bar 32 so as to face the mounting plate 29, and a pair of left and right insertion holes 33 a are provided in the support stay 33 with a predetermined interval therebetween. On the other hand, a pair of left and right elongated holes 29a are provided in the mounting plate 29 so as to extend in the vertical direction with a predetermined interval between them so that the elongated holes 29a and the insertion holes 33a of the support stay 33 coincide. ing.

  Then, with the insertion hole 33 a of the support stay 33 aligned with the upper and lower parts of the long hole 29 a of the mounting plate 29, the bolt 35 is inserted into the insertion hole 33 a and the long hole 29 a, and the support stay 33 is connected with this and the nut 36. Is fastened to the mounting plate 29 to fix the support member 30 to the body frame 2.

  Here, the position of the insertion hole 33a of the support stay 33 with respect to the long hole 29a of the attachment plate 29 is changed, and the support stay 33 is fastened to the attachment plate 29 with bolts 35 and nuts 36, whereby the body frame 2 of the support member 30 is secured. The mounting position in the vertical direction with respect to the wheel, that is, the vertical position of the left and right wheels 8 can be adjusted.

  However, the structure for adjusting the vertical position of the wheel is not limited. For example, the vertical position of the wheel may be adjusted by attaching the support member to the mounting plate so as to be rotatable and rotating it in the vertical direction. It is possible to adjust the vertical position by providing a screw shaft in the vertical direction, screwing it on the screw pipe provided on the wheel side and changing it to an arbitrary height, or connecting the wheel to the pipe fixed to the machine body side It is also possible to adjust the vertical position by inserting the hooks provided on the side in the vertical direction and inserting pins into these to change the height to an arbitrary height.

  Further, the support member 30 is provided with rotation resistance applying means 40 for applying rotation resistance to the left and right wheels 8. The rotation resistance applying means 40 includes left and right brake cams 41 and connecting shafts 42, each brake cam 41 extends in the vertical direction, and the upper ends of both brake cams 41 are connected by the connecting shaft 42. The brake cam 41 is supported on the support arm 31 of the support member 30 so as to be rotatable about the connecting shaft 42.

  The brake cam 41 is disposed opposite to the front upper side of the wheel 8 and is separated from the ground contact surface of the wheel 8 by a predetermined interval. In the normal state, the brake cam 41 is in a rotation position where it does not come into contact with the ground contact surface (outer peripheral surface) of the wheel 8, and when the brake cam 41 is rotated rearward (wheel 8 side), the contact portion formed on the lower end side outer peripheral surface. In 41a, the wheel 8 is in a rotating position where it comes into contact with the ground contact surface, and a rotational resistance can be applied to the wheel 8.

  One end of a wire 43 is connected to the middle part of the left and right brake cam 41, and the other end of the wire 43 is connected to the rod 21 of the clutch lever 15 via a connecting piece 22. The clutch lever 15 is linked and connected. Thus, when the clutch lever 15 is used as an operating tool for the brake cam 41 and the clutch lever 15 is gripped, the left and right brake cams 41 are rotated about the connecting shaft 42, and the abutment portion 41 a is moved to the wheel 8. It is possible to contact the grounding surface.

  Therefore, when the clutch lever 15 is gripped and the clutch is connected, the wheel 8 is simultaneously provided with rotational resistance by the brake cam 41 so that the wheel 8 cannot be rotated, and the wheel 8 is inserted into the soil. A resistance force to the traction force of 4 can be given. Thereby, the vertical position of a wheel can be adjusted as mentioned above, a tilling amount can be set arbitrarily, and a tilling work can be performed.

  On the other hand, when the clutch lever 15 is released and the clutch is disengaged, the state of imparting rotational resistance to the wheel 8 is released accordingly, the wheel 8 can be rotated, and the vehicle body can be easily moved by the wheel 8. be able to. In this way, a rotational resistance is applied to the wheel 8 by remote operation by the clutch lever 15 or the release thereof is performed, thereby making it easy to switch the machine body between the working state and the moving state.

  Note that the brake cam operating tool can be provided in the vicinity of the grip portion of the handle as a separate body from the clutch lever. Alternatively, instead of providing an operation tool, it is possible to provide a means for fixing the rotational position of the brake cam so that it is brought into contact with the ground contact surface of the wheel at the time of tillage work and fixed in a state in which rotational resistance is applied. is there. The rotation resistance applying means is not particularly limited as long as the rotation resistance can be applied to the wheel so that the rotation cannot be performed or the rotation speed can be reduced, and the brake cam is brought into contact with the side surface of the wheel. It is also possible to make the brake cam come into contact with the rotating shaft of the wheel.

  As described above, in the walking work machine 1 having the rotary tiller 4 at the front part of the machine body, the wheel 8 is attached to the rear part of the machine body so that the vertical position can be adjusted, and rotation resistance can be applied to the wheel 8. By providing the means 40, the rotational resistance is applied to the wheel 8 by the rotational resistance applying means 40, and the resistance force against the traction force of the rotary tiller 4 is sufficiently given by the wheel 8 to perform the tilling work. Can do. Further, by canceling the application of rotational resistance to the wheel 8, the body can be easily moved using the wheel 8.

  Moreover, in the said walk type working machine 1, by providing the said wheel 8 with a pair of right and left, a body can be stabilized and it can work and move.

  Further, in the walking work machine 1, a handle 10 extending rearward is provided at the rear part of the machine body, and an operating tool for the rotation resistance applying means 40, in the present embodiment, a clutch lever 15 is provided in the vicinity of the grip part 11 of the handle 10. It is possible to remotely control the rotation resistance applied to the wheel 8 by the rotation resistance applying means 40 and the release thereof, and move from the working state using the wheel 8 to the moving state or vice versa. The transition from the state to the working state can be performed smoothly.

The side view of the walking type working machine which concerns on one Example of this invention. The top view of the walking type working machine which concerns on one Example of this invention. The top view of the holding part of a handle. The partial cross section side view of the attaching part of a wheel. The rear view of the attaching part of a wheel.

DESCRIPTION OF SYMBOLS 1 Walking type work machine 4 Tillage device 8 Wheel 10 Handle 15 Clutch lever 40 Rotation resistance provision means

Claims (1)

An engine (3), a transmission (5), and a tilling device (4) are provided at the front part of the machine body, and a wheel (8) is attached to the rear part of the machine body so that the vertical position can be adjusted, and rotation resistance can be applied to the wheel (8). In the walking work machine (1) provided with the rotation resistance applying means (40), the handle (10) extending to the rear of the machine body is constituted by the collar part (12) and the grip part (11), and the grip part ( 11) is formed in a loop shape arranged in the left-right direction, and a vertically operated vertical operation portion (15a) and a horizontal operation portion (15b) are similarly bent downward along the bent portion of the loop-shaped gripping portion (11). The left and right deadman type clutch levers (15, 15) are provided, and the clutch lever (15) is gripped together with the grip portion (11) to connect the clutch of the transmission (5), and from the engine (3) Driving a tillage device (4) On the contrary, the clutch is disengaged by releasing the clutch lever (15) and the tilling device (4) is stopped, and the left and right clutch levers (15, 15) are connected to the vertical operation portion (15a). By connecting and integrating the left and right ends of the rod (21) extending in the left-right direction at the front end, and operating the clutch lever (15, 15) from the left side or the right side of the fuselage, The rotation resistance applying means (40) attached to the rear part of the walking type work machine (1) can be operated by applying a rotation resistance to the wheel (8) by the brake cam (41). The clutch lever (15) is also interlocked with the brake cam (41), and the clutch lever is connected by holding the clutch lever (15). In (41) is unable to rotate by applying a rotational resistance to the wheel (8), the plow (4) walk-behind working machine, characterized in that impart resistance to traction.

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