JP2013099323A - Walking type grass mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a walking type grass mower that reduces the operation man-hour of an operation lever when grass mowing is started and stopped and improves working efficiency.SOLUTION: The walking type grass mower equipped with a mowing blade clutch lever 95 and a throttle lever 94 in the vicinity of a handle 9 part includes an interlocking mechanism that is interlocked with a change from an OFF state to an ON state of the mowing blade clutch lever 95 and changes the throttle lever 94 from an OFF state to an ON state.

Description

  The present invention relates to a walking mower.

  In the vicinity of the handle part of the conventional walking type mower, operation parts such as a deadman clutch lever, a throttle lever, a cutting blade clutch lever, and a travel lever are provided (see Patent Document 1).

JP 2011-167131 A

However, each control lever has a structure that can be operated independently, and thus has the following problems.
In other words, in order to start mowing by rotating the cutting blade, it is necessary to individually operate the cutting blade clutch lever and the rotary throttle lever of the cutting blade, and both levers must be individually operated when stopping mowing. Therefore, there is a problem that the lever operation is troublesome.

  The problem to be solved by the present invention is to provide a walk-type mower capable of reducing the man-hours of operation levers at the start and stop of mowing and increasing the work efficiency.

In order to solve the above-mentioned problem, the invention according to claim 1 is a walking type mower having a cutting blade clutch lever and a throttle lever in the vicinity of a handle portion.
A means is provided that includes an interlocking mechanism that switches from the throttle lever OFF state to the ON state in conjunction with switching of the cutting blade clutch lever from the OFF state to the ON state.

The invention according to claim 2 is the invention according to claim 1,
The interlocking mechanism is connected via a first throttle interlocking arm in which the cutting blade clutch lever and the throttle lever are connected to the middle part of the cutting blade clutch lever, and a second throttle interlocking arm connected to the middle part of the throttle lever. ,
When the cutting blade clutch lever is in the OFF state, the engaging pin provided on the distal end side of the second throttle interlocking arm engages with one end of the slide groove provided on the leading end of the first throttle interlocking arm. The throttle lever is switched to the ON side in conjunction with the turning operation to the ON side.

According to the first aspect of the present invention, as described above, the cutting blade clutch is provided with the interlocking mechanism for switching from the throttle lever OFF state to the ON state in conjunction with the switching of the cutting blade clutch lever from the OFF state to the ON state. The throttle lever can be switched to the ON state simply by turning the lever ON.
Thereby, the operation man-hour of an operation lever can be reduced and work efficiency can be improved.

  According to the second aspect of the present invention, as described above, the engagement pin provided on the distal end side of the second throttle interlocking arm with the cutting blade clutch lever in the OFF state is one end of the slide groove provided on the distal end of the first throttle interlocking arm. When the cutting blade clutch lever is in the OFF state, it is engaged when the cutting blade clutch lever is in the OFF state by interlocking with the turning operation of the cutting blade clutch lever to the ON side. Since the pin relatively moves along the slide groove, the throttle lever can be operated alone to the ON side.

It is a top view which shows the whole walking type mower of an Example. It is a front view which shows the whole walking mower of an Example. It is a rear view which shows the whole walking mower of an Example. It is a right view which shows the whole walking mower of an Example. It is a top view of the state which removed a part of cover which shows the walk-type mower of an Example. It is a top view which shows the state which made the cutting part slide to the full horizontal direction in FIG. It is a perspective view in the state where a part of cover which shows the walk type mower of an example was removed. It is a perspective view which shows the state which slid the cutting part to the full horizontal direction in FIG. It is a side view of the state which removed the cover which shows the state which raised the cutting part in the walk-type mower of an Example. It is a side view which shows the state which lowered the cutting part in FIG. It is a front view which shows the state rolled in the clockwise direction seeing the cutting part side in the walk-type mower of an Example from a front. It is a front view which shows the state which rolled in the counterclockwise direction seeing the cutting part side in the walk-type mower of an Example from a front. It is explanatory drawing which shows the detail and action | operation of a slide lock mechanism. It is explanatory drawing which shows the detail and action | operation of a remote control mechanism. It is explanatory drawing which shows the detail and action | operation of a throttle lever interlocking mechanism. It is explanatory drawing which shows the detail and action | operation of a cutting blade clutch lever interlocking mechanism. It is a perspective view which shows the power transmission structure to a cutting blade. It is a front view which shows the power transmission structure to a cutting blade. It is a vertical side view in the S19-S19 line of FIG. It is a top view which shows the relationship between a deadman clutch lever and a travel lever. It is a vertical side view which shows the relationship between a deadman clutch lever and a travel lever. It is a perspective view which shows a cam plate. It is a perspective view which shows a driving | running | working stage plate.

  Embodiments of the present invention will be described below with reference to the drawings.

First, the walking type mower according to the first embodiment will be described with reference to the drawings.
This walking type mowing machine includes a travel drive unit 1 using a crawler (drive wheel) 11, a support frame 2 having a pair of left and right casters 21, 21 on the tip side, a cutting unit 3 having a cutting blade 31, and a lateral slide. A mechanism 4, a lifting mechanism 5, a rolling bearing mechanism 6, a lock mechanism 7, a remote operation mechanism 8 of the lifting mechanism 5, and a handle 9 are provided as main components.

  More specifically, the travel drive unit 1 by the crawler 11 includes an engine 12, a transmission 13 directly connected to the engine 12, and the like, and a handle 9 that performs an operation such as steering is provided on the travel drive unit 1. .

The support frame 2 is connected to the travel drive unit 1 via a rolling bearing mechanism 6 so as to be freely rollable.
The rolling bearing mechanism 6 includes a rolling bearing 61 on the travel drive unit 1 side and a rolling shaft 62 on the support frame 2 side connected to the rolling bearing 61 so as to be capable of rolling.
The support frame 2 is coupled to the rolling shaft 62 of the rolling bearing mechanism 6 via the lateral sliding mechanism 4 so as to be slidable in the lateral direction.

The lateral slide mechanism 4 can be laterally slid along the two front and rear rail guides 62 a and 62 b provided in parallel with the front and rear of the rolling shaft 62.
Further, the lateral slide mechanism 4 is provided with a lock mechanism 7 that performs slide lock and release.
The locking mechanism 7 is configured to slide the support frame 2 sideways by engaging an engagement portion 72a provided on a slide lock arm 72 provided on the support frame 2 side with a slide lock pin 71 provided on the rail guide 62b. Is locked.
In other words, the slide lock arm 72 is urged by the urging means (coil spring) 74 in the direction in which the slide lock arm 72 is always engaged with the slide lock pin 71, whereby the lateral slide of the support frame 2 is locked. . Further, by operating the operation lever 73, the slide lock arm 72 is rotated about the rotation support shaft 72b against the urging force of the urging means 74 via the plurality of transmission link mechanisms 75, whereby the slide lock pin 71 is rotated. The engagement state of the engagement portion 72a with respect to is released, thereby enabling horizontal sliding.
The slide lock pin 71 is provided at a position before the slide and a position where the slide lock pin 71 is slid to the maximum.

The cutting unit 3 is provided in a state of being suspended from the support frame 2 via a lifting mechanism 5 so as to be lifted and lowered.
The elevating mechanism 5 includes a link mechanism 51 that is formed between the support frame 2 and the cutting unit 3 and includes parallel links 5a and 5b that are parallel in the up-and-down direction, and the upper link 5a is connected via a wire 5c. The height adjustment of the cutting unit 3 from the ground is performed by rotating in the vertical direction.

  Further, the elevating mechanism 5 can adjust the cutting height and lock and unlock the mowing portion by a remote operation mechanism 8 provided at the driver's foot on the traveling drive unit 1 side.

That is, the remote operation mechanism 8 includes an adjustment latch claw 81, a cutting height lock pedal 82, and a cutting height adjustment pedal 83.
A plurality of locking claws 81a are provided on the outer periphery of the adjustment latch claw 81, and the other end of the wire 5c is connected to the tip of an arm 81c protruding from the rotation support shaft 81b.
The cutting height lock pedal 82 is urged by a coil spring (biasing means) 82c in a direction in which a lock pin 82b provided on the distal end side of the rotary support shaft 82a is always engaged with the locking claw 81a of the adjustment latch claw 81. The cutting height adjusting pedal 83 is provided with an engaging pin 83b on the distal end side of the rotation support shaft 83a, and the engaging pin 83b is engaged with the engaging claw 81a of the adjusting latch claw 81 each time the cutting height adjusting pedal 82 is depressed. And the adjustment latch claw is rotated one step at a time. As a result, the arm 81c of the adjustment latch claw 81 rotates and pulls the wire 5c to raise the cutting part 3 step by step.
Each time the adjustment latch claw 81 rotates by depressing the cutting height adjusting pedal 82, the cutting height lock pedal 82 rotates against the urging force of the urging means, and the lock pin 82b is engaged with the next latch. The claw 81a is engaged and locked.

The rotation of the cutting blade 31 is transmitted from the PTO shaft 14, which is an output shaft from the traveling drive unit 1 side, to the bevel gear mechanism 33 provided on the upper surface of the cutting unit 3 through the transmission shaft 32, and is transmitted through the transmission shaft 32. The rotational power in the direction is converted into the vertical axis rotation of the cutting blade 31 by the bevel gear mechanism 33 and transmitted.
The transmission shaft 32 is connected via a universal joint 35 to a cylindrical first shaft portion 32 a connected to the PTO shaft 14 via a universal joint 34 and to an input shaft 33 a of the bevel gear mechanism 33. The first shaft portion 32a and the second shaft portion 32b are configured such that they cannot be rotated relative to each other by spline coupling and can extend and contract in the axial direction.

The handle 9 can be adjusted in height, and the grip 91 includes an operation panel 92.
The grip portion 91 includes a deadman clutch lever 93, and the operation panel 92 includes a throttle lever 94, a cutting blade clutch lever 95, and a travel lever 96.
The travel lever 96 is urged by urging means in a direction to return to the neutral position.

The deadman clutch lever 93 is provided on the upper part of the grip 91. When the grip 91 is gripped, the deadman clutch 93 is simultaneously held and the travel lever 96 is operated to the forward or reverse position. It is locked in the operated forward or reverse position. When the hand is released from the deadman clutch 93 in this state, the traveling lever 96 is unlocked and returned to the neutral position by the urging force of the urging means.
The throttle lever 94 is connected to an engine side throttle lever (not shown) via a wire 94a, and the throttle opening degree is opened by tilting the throttle lever 94 to the front side to increase the traveling speed.
When the cutting blade clutch lever 95 is tilted forward, the clutch is engaged and the cutting blade 31 starts to rotate.

However, in this embodiment, the cutting blade clutch lever 95 and the throttle lever 94 are connected via the throttle interlocking arms 95a and 94b, and when the cutting blade clutch lever 95 is in the OFF state, the throttle lever 94 can be operated independently. When the cutting blade clutch lever 95 is tilted forward and turned ON, the throttle lever 94 is interlocked and tilted forward and the throttle mechanism is turned on.
That is, when the cutting blade clutch lever 95 is in the OFF state, the engagement pin 95b provided on the distal end side of the second throttle interlocking arm 95a connected to the middle portion of the cutting blade clutch lever 95 is the first throttle interlocking arm 94a.
By engaging with one end of a slide groove 94c provided in the middle of the throttle lever 94, which is the tip of the throttle lever 94, the throttle lever 94 is also tilted forward in conjunction with the turning operation of the cutting blade clutch lever 95 forward. Although the throttle is in the ON state, when the cutting blade clutch lever 95 is in the OFF state, the engagement state of the engagement pin 95b is released by the slide groove 94c, so that the throttle lever 94 can be operated independently.
The throttle ON means the direction of opening the throttle opening, and OFF means the direction of closing the throttle opening.

The cutting blade clutch lever 95 pulls a wire 95c connected to a PTO clutch (not shown) of the traveling drive unit 1 through a fulcrum passing mechanism 95d, so that the cutting blade clutch is turned ON / OFF.
The rotary spindle 95e of the cutting blade clutch lever 95 is provided with a lever return arm 95f, and the deadman clutch lever 93 is a lever return pin that comes into contact with the lever return arm 95f in a state where the cutting blade clutch lever 95 is fully tilted forward. 93a is provided. For this reason, when the deadman clutch lever 93 is switched from the ON state to the OFF state by releasing the grip 91, the lever return pin 93a pushes the lever return arm 95f upward, and the cutting blade clutch lever 95 is turned OFF. The interlocking mechanism C which can do is provided.

Next, operations and effects of the first embodiment will be described.
In the first embodiment, as described above, since the interlocking mechanism for switching the throttle lever from the OFF state to the ON state in conjunction with the switching from the OFF state to the ON state of the cutting blade clutch lever is provided, the cutting blade clutch lever is The throttle lever can be switched to the ON state simply by turning it ON.
Thereby, the operation man-hour of an operation lever can be reduced and work efficiency can be improved.

  Further, as described above, when the cutting blade clutch lever is in the OFF state, the engagement pin provided on the distal end side of the second throttle interlocking arm is engaged with one end of the slide groove provided on the distal end of the first throttle interlocking arm. By switching the cutting blade clutch lever to the throttle lever ON side in conjunction with the turning operation of the cutting blade clutch lever to the ON side, when the cutting blade clutch lever is in the OFF state, the engagement pin follows the slide groove. Therefore, the throttle lever can be operated alone to the ON side.

  Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.

1 Traveling drive 11 Crawler (drive wheel)
DESCRIPTION OF SYMBOLS 12 Engine 13 Transmission 14 PTO shaft 2 Support frame 21 Caster 3 Cutting part 31 Cutting blade 32 Transmission shaft 32a First shaft portion 32b Second shaft portion 33 Bevel gear mechanism 33a Input shaft 34 Universal joint 35 Universal joint 36 Cutting blade cover 37 Cutting blade Cover 4 Lateral slide mechanism 5 Elevating mechanism 5a Upper link 5b Lower link 5c Wire 51 Link mechanism 6 Rolling bearing mechanism 61 Rolling bearing 62 Rolling shaft 62a Rail guide 62b Rail guide 7 Lock mechanism 71 Slide lock pin 72 Slide lock arm 72a Engagement portion 72b Rotating support shaft 73 Operation lever 74 Coil spring (biasing means)
75 Transmission link 8 Remote operation mechanism 81 Adjustment clutch claw 81a Locking claw 81b Rotating spindle 81c Arm 82 Cutting height lock pedal 82a Rotating spindle 82b Lock pin 83 Cutting height adjustment pedal 83a Rotating spindle 83b Engaging pin 9 Handle 91 grip 92 operation panel 92a frame 92b frame 93 deadman clutch lever 93a lever return pin 93b support shaft 93c fulcrum 93d cam plate 93e cam plate 93f lock pin 94 throttle lever 94a wire 94b second throttle interlocking arm 94c slide groove 95 cutting blade clutch Lever 95a First throttle interlocking arm 95b Engagement pin 95c Wire 95d Supporting mechanism 95e Rotation support 95f Lever return arm 96 Traveling lever 96a Supporting point 6b shaft 96c arm 96d wire 96e traveling stage plate 96f lock groove 96g coil spring B throttle interlocking mechanism C mowing blade clutch interlocking mechanism

Claims (2)

  In a walking type mower having a cutting blade clutch lever 95 and a throttle lever 94 near the handle 9, the throttle lever 94 is switched from the OFF state to the ON state in conjunction with the switching of the cutting blade clutch lever 95 from the OFF state to the ON state. An interlocking mechanism for switching is provided. The walking type mower according to claim 1,
The interlocking mechanism is connected via a first throttle interlocking arm in which the cutting blade clutch lever and the throttle lever are connected to the middle part of the cutting blade clutch lever, and a second throttle interlocking arm connected to the middle part of the throttle lever. ,
When the cutting blade clutch lever is in the OFF state, the engaging pin provided on the distal end side of the second throttle interlocking arm engages with one end of the slide groove provided on the leading end of the first throttle interlocking arm. The throttle lever is configured to be switched to the ON side in conjunction with the turning operation to the ON side.

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