JP2017209060A - Walking type mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a walking type mower capable of performing mowing work in a wide width in a flat land and performing mowing work easily and efficiently even on a levee, etc.SOLUTION: A walking type mower includes a mowing blade housing 3 including ground wheels 2, 2 at right/left both outer positions in a front part of a machine body 1, and a prime mover 4 and a right/left pair of travel wheels 5, 5 in a rear part. Mowing work may be performed while a handle 6 extending rearward and upward in the machine body 1 is gripped and operated by a worker walking rearward. A right/left distance W between the travel wheels 5, 5 is expandable/contractable. A ground wheel attachment part 7 is arranged in a center part on a front upper side of the mowing blade housing 3 and the ground wheel 2a is attachable/detachable to the ground wheel attachment part 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a walking mower having a pair of left and right traveling driving wheels, and more particularly, when mowing on a flat ground, the mowing of the mowing grass is good, and the mowing on a narrow ridge. The present invention relates to a configuration of a walking mower that can be easily performed in work.

  A walking type grass mower provided with grounding wheels on both the left and right sides of the cutting blade housing is disclosed in Patent Document 1, and a grass mower provided with a grounding wheel in the front center portion of the cutting blade housing is disclosed in Patent Document 2. .

JP 2008-167679 A JP-A-8-336722

  Conventionally, walking in a four-wheel drive configuration provided with a pair of left and right traveling drive wheels provided at the rear of the fuselage and a pair of left and right ground wheels provided at the front of the fuselage, or a pair of left and right front wheels that are driven in the same manner as the traveling drive wheels. A type mower is known. Also, there is a walking type grass mower provided with a pair of left and right traveling drive wheels or traveling crawlers at the rear of the machine body, provided with a cutting blade housing including a mowing device in front thereof, and provided with grounding wheels on the left and right sides of the cutting blade housing. Are known. However, these walking-type mowers are considered to have grass-cutting obstacles at the front center of the cutting blade housing in consideration of the mowing efficiency, the left / right balance of the machine, and the cutting ability of the cutting grass into the cutting blade housing. In many cases, the grounding wheel is provided on the left and right outer sides of the cutting blade housing, and the distance between the left and right traveling wheels is wide. Although these walking-type mowers with wide grounding wheels and traveling wheels are relatively small, when performing mowing work on narrow ridges, the abdomen of the fuselage touches down and cannot perform mowing work. It was. Accordingly, an object of the present invention is to provide a walking type mower that can perform a wide range of mowing work on a flat day and can be easily and efficiently performed even in mowing work such as on a ridge.

  A cutting blade housing 3 provided with grounding wheels 2 and 2 is provided at the left and right outer positions in front of the machine body 1, and a prime mover 4 and a pair of left and right running wheels 5 and 5 are provided behind the machine body 1, and extend upward in the rear of the machine body 1. In the walking type grass mower capable of performing the mowing work while an operator walking behind the handle 6 is gripped, the left and right distance W between the traveling wheels 5 and 5 is configured to be able to be expanded and contracted. A grounding ring attaching portion 7 is provided at the center of the front side of the blade housing 3, and the grounding ring 2 a is configured to be attachable to and detachable from the grounding wheel attaching portion 7.

  Further, the grounding blade housing 3 is configured to be detachable from the grounding wheel attachment portion 7 by removing one of the grounding wheels 2 and 2 provided at the left and right outer positions.

  Further, the cutting device 8 in the cutting blade housing 3 is configured in the form of a hammer knife in which a plurality of flail knives 10 are arranged around the cutting blade shaft 9 in the lateral direction, from the upper front of the cutting blade housing 3 to the upper front. The anti-scattering cover 11 is provided so as to prevent gravel soil and grass from scattering toward the worker side, which is formed so as to project toward the left and right width WK of the cutting blade housing 3. A part or the whole of the wheel attaching portion 7 is fixed.

  According to the first aspect of the present invention, the right and left distance W between the traveling wheels 5 and 5 is configured to be enlarged and reduced, and the grounding wheel attaching portion 7 is provided at the center of the front upper portion of the cutting blade housing 3. Since the grounding wheel 2a is configured to be detachable from the attachment portion 7, when performing mowing work such as flat ground, the grounding wheels 2, 2 and the left and right traveling wheels 5, By widening the interval 5 and making it wide, the stability of the machine 1 and the grass scraping are good, and when performing mowing work such as narrow ridges, the front upper center of the cutting blade housing 3 The grounding wheel 2a is attached to the grounding wheel mounting part 7 provided in the part, and the left and right traveling wheels 5, 5 and the interval W are reduced to form a narrow width, so that the grass cutting such as a ridge on a narrow enough to walk is possible. Work can also be performed.

  The invention according to claim 2 is configured such that either the grounding wheel 2 or 2 provided at the left and right outer side positions of the cutting blade housing 3 is detached and detachable from the grounding wheel attachment portion 7. Therefore, it is possible to effectively use the grounding rings 2 and 2 at both outer positions of the cutting blade housing 3 which are not necessary in the mowing work in a narrow width such as on the ridge.

  According to the third aspect of the present invention, the cutting device 8 in the cutting blade housing 3 is configured in the form of a hammer knife in which a plurality of flail knives 10 are disposed around the cutting blade shaft 9 in the lateral direction. An anti-scattering cover 11 is provided which protrudes from the front upper side to the front upper side and is formed to have approximately the same width as the horizontal width KW of the cutting blade housing 3 to prevent gravel soil and grass from scattering toward the worker side. Since a part or all of the grounding ring attachment portion 7 is fixed to the scattering prevention cover 11, a scattering prevention cover serving as a strength member is provided on the upper front side of the cutting blade housing 3 which is usually formed of a thin plate. The grounding wheel attachment part 7 is provided in the center, and the grounding wheel attachment part 7 is firmly fixed, so that stable mowing work can be maintained. In addition, when the grounding ring 2 or 2a is attached to the center of the upper surface of the front part of the cutting blade housing 3, the grounding ring 2 or 2a serves as a center marker, so that it is easy to carry out narrow grass cutting work. Has an effect.

Overall plan view of walking type mower Overall side view of walking mower Rear view showing the relationship between the driving wheel and the ground wheel Side view showing the configuration of the contact ring Side view showing the attachment / detachment state of the ground ring Side view when the grounding ring is set to the lowest position

  In the walking type mower of the present invention, a mowing device 8 capable of mowing weeds is provided in front of the machine body 1, and an outer peripheral portion thereof is covered with a cutting blade housing 3. A gear box 15 is provided at the center of the machine body, the prime mover 4 is provided behind it, a traveling wheel 5 for traveling is provided below, and a handle 6 extending from the upper part of the gear box 15 toward the rear upper side above the prime mover 4 is provided. It is provided. The power of the prime mover 4 is transmitted to the traveling wheel 5 and the cutting device 8 through the gear box 15, the transmission to the traveling wheel 5 is performed by the traveling clutch 16, and the transmission to the cutting device 8 is performed by the cutting clutch 17. By turning off, you can turn on and off the transmission to each. Reference numeral 22 denotes a side clutch lever for turning on / off driving and fixing of rotation of the left and right traveling wheels 5 and 5, 18 is a shift lever for shifting the traveling speed, and 19 is an increase / decrease in the rotational speed of the prime mover 4. The throttle lever 20 is turned when the handle 6 is turned in a state A in which the handle 6 is directed in the same direction as the airframe 1 or in a state B in which the handle 6 is directed in a direction orthogonal to the airframe 1 advancing direction. The swivel lever that can be brought into a possible state is configured to be able to turn further forward from the state B, which is about 100 degrees left and right from the state A, that is, in the direction perpendicular to the traveling direction of the airframe 1. Reference numeral 21 denotes a handle up / down lever that can switch the vertical rotation of the handle 6 between a fixed state and a rotatable state.

  The left-right distance W between the traveling wheels 5 and 5 is configured such that the distance between the wheels can be expanded and contracted between an expanded state W1 and a contracted state W2. The expansion / contraction method is performed by removing the pin 23 and changing the hole positions of the axle 24 hole and the wheel boss 25. The traveling wheels 5 and 5 employ relatively wide tires, and the gear box 15 provided between the left and right traveling wheels 5 and 5 is formed to be narrow. The left and right stability is good, and even when it is reduced, the left and right stability is maintained, and it is possible to travel stably on a narrow road surface such as a saddle.

  The driving force of the prime mover 4 is transmitted to the cutting blade shaft 9 via the gear box 15 and the cutting blade transmission system D, and this transmission can be connected and disconnected by turning on and off the cutting blade clutch 17. . A plurality of flare knives 10 are provided around the cutting blade shaft 9, and the flail knives 10 are attached to a pair of left and right knives in a Y-shape, and can rotate within a predetermined range. This is a hammer knife configuration in which grass can be cut by upper rotation in which the front side of the cutting blade shaft 9 rotates upward in a side view. The outer periphery of the cutting device 8 is covered with a cutting blade housing 3, and the left and right outer portions of the cutting blade housing 3 are provided with wheels 31 that are pivotally supported by a grounding wheel shaft 30, and are provided with grounding wheels 2 and 2 that can slide up and down. It is. The vertical slide of the grounding wheels 2 and 2 pulls the lever 27 against the biasing force of the spring 26, releases the fitting of the hole 29 of the sliding rod 28 of the grounding wheels 2 and 2, and fits into the other hole 29. Can be done.

  Gravel soil and grass are scattered from the front of the cutting blade housing 3 toward the operator (operator) side by vines, strings, etc. wound around the cutting device 8 in the form of a hammer knife on the front upper side of the cutting blade housing 3. The anti-scattering cover 11 is provided. The scattering prevention cover 11 is formed to have substantially the same width as the left and right width WK of the cutting blade housing 3, and is attached to the cover bases 32 provided at the left and right ends on the front upper side of the cutting blade housing 3 with bolts 33. The grounding blade mounting portion 7 is provided at the center of the left and right sides of the anti-scattering cover 11 so that the grounding wheel 2a or 2 can be attached. In the present embodiment, the grounding wheel attaching portion 7 is entirely welded to the scattering prevention cover 11, but a part thereof may be fixed to the cutting blade housing 3 side. The grounding wheel to be attached to the grounding wheel attachment part 7 can be attached with a new grounding ring 2a or either one of the grounding rings 2, 2 provided on the left and right outer sides of the cutting blade housing 3. You may comprise. When either one of the left and right grounding wheels 2 is attached to the grounding wheel attaching portion 7, the remaining one of the grounding wheels 2 is removed, and a sliding rod 28 is inserted from above the grounding wheel base 34 to ground. It is preferable to attach the wheel 2 in the opposite direction so that the grass does not come into contact with the ground wheel 2 during the mowing operation.

  At the time of mowing work on an inclined land and a flat land, it is possible to perform a stable mowing work by setting the expanded state W1 in which the distance W between the traveling wheels 5 and 5 is expanded. Further, during mowing work such as on a ridge, the left and right distance W between the traveling wheels 5 and 5 is set to a reduced state W2, and a new grounding wheel 2a or a grounding wheel 2 provided on both left and right outer sides of the cutting blade housing 3 is set. 2, one of the grounding rings 2 is attached to the grounding ring attaching part 7 provided in the left and right center part. Usually, the paddy also has the purpose of improving the ventilation of the field, and it is necessary to perform the mowing work on the paddy comparatively frequently. Even if the rings 2 and 2a protrude, there is not much influence on the performance of taking the mowing grass into the mowing device 8, and it is possible to carry out a mowing operation without a stable cutting even on narrow ridges. It is.

  The grounding ring bases 34 on the left and right outer sides of the cutting blade housing 3 are formed in a square pipe shape and welded rearward and upward, and the grounding ring base 34 is shaped like a square pipe in the cross section of the grounding wheels 2 and 2. It is possible to adjust the cutting height of the cut grass by sliding the sliding rod 28 up and down. The vertical height adjustment of the grounding wheels 2 and 2 can be performed by fitting and releasing a plurality of holes 29 provided in the sliding rod 28 and the lever 27. When the grounding rings 2 and 2 are set at the lowest position so that the cutting height of the grass is increased, the grounding rings 2 and 2 are moved to the most forward position. The front end is configured so as not to protrude from the front end F of the cutting blade housing 3 side plate 35, so that the cutting grass can be taken in from the front and the grass is not caught on the grounding rings 2 and 2.

DESCRIPTION OF SYMBOLS 1 Airframe 2 Grounding wheel 2a Grounding wheel 3 Cutting blade housing 4 Motor 5 Running wheel 6 Handle 7 Grounding wheel attachment part 8 Cutting device 9 Cutting blade axis 10 Flail knife 11 Splash prevention cover W Interval WK Left / right width

Claims (3)

  A cutting blade housing (3) provided with grounding wheels (2), (2) at the left and right outer positions is provided in front of the machine body (1), and a motor (4) and a pair of left and right traveling wheels (5), (5) In the walking type grass mower capable of performing the mowing work while the operator walking in the rear of the body (1) extending toward the rear upper side of the machine body (1) The left and right distance (W) between the traveling wheels (5) and (5) can be expanded and contracted, and a grounding wheel attachment portion (7) is provided at the center of the front upper portion of the cutting blade housing (3). A walking mower characterized in that the ground ring (2a) is detachably attached to the wheel attachment portion (7).   The cutting blade housing (3) is configured such that either one of the grounding rings (2) and (2) provided at the left and right outer side positions is detached and detachable from the grounding ring attachment part (7). Item 1. A walking mower according to item 1.   The cutting device (8) in the cutting blade housing (3) is configured in the form of a hammer knife in which a plurality of flail knives (10) are arranged around the horizontal cutting blade shaft (9), and the cutting blade housing (3 ) Spattering projecting from the front upper side to the front upper side and formed to have approximately the same width as the horizontal width (WK) of the cutting blade housing (3) to prevent gravel soil and grass from scattering toward the operator side The walk type grass mower according to claim 1 or 2, wherein a prevention cover (11) is provided, and a part or all of the grounding ring attachment portion (7) is fixed to the scattering prevention cover (11).

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