JP2006141289A - Grass mower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a large-sized grass mower fitted to an arm top of heavy equipment which is a large-sized machine for civil engineering works and scarcely causing vibration by high-speed slide motion of a blade and capable of corresponding to size of operation area and regulating to adequate reaping width. <P>SOLUTION: The grass mower 1 has a hydraulic driving arm 2 capable of freely being bent and stretched and detachably attached to the top of an arm of heavy equipment such as a shovel car which is a self-traveling operating machine. The grass mower 1 is installed rotatably through a rotating and driving apparatus such as a bearing 3, a gear or a motor to the hydraulic driving arm 3 and rotating power from an electric motor separately installed is transmitted to a gear-transmitting mechanism and a crank arm 9 and linearly reciprocating power is transmitted from the crank arm 9 to the former of a pair of upper comb-shaped blade plate and lower comb-shaped blade plate slidably superimposed from the crank arm 9 and the grass mower 1 enables cutting of weeds by relative reciprocating sliding between these comb-shaped blade plates, and in the grass mower, a counter weight having same size and same weight as those of the upper comb-shaped blade plate which carries out reciprocating sliding is installed and the counter weight is reciprocated in a phase which is reverse to the upper comb-shaped blade plate to absorb inertial oscillation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mowing apparatus that can easily cut weeds, small trees, and the like in farms, mountain forests, forest roads, river beds, construction sites, and the like.

  Generally, the upper comb blade and the lower comb blade are superposed in a vertically rubbed state, and the upper comb blade and the lower comb blade are slid to the left and right by the drive mechanism, that is, reciprocally move back and forth to cut grass like a clipper. Is known (Patent Document 1).

  Such a conventional mower is, for example, a hand-held mower, and is formed to be relatively small and light. In this case, even if the comb blades rubbed from above and below are moved at a relatively high speed, A large inertia force was not generated, and there was no violent vibration especially affecting the mowing performance.

JP-A-9-149722

  However, when the mechanism of the conventional mowing apparatus described above is enlarged and attached to the end of an arm of a heavy machine that is a large civil engineering machine, and the upper blade plate and the lower blade plate are slid to the left and right by the drive mechanism, the blade plate A large inertial force is generated in accordance with the weight, which causes vibrations in the swinging direction, which makes it difficult to turn the arm tip in a required direction or hold the arm in a required position.

  Also, the upper blade plate and lower blade plate are slidable to the left and right by the drive mechanism, and the device that cuts grass like a clipper makes it possible to cut the grass wide, so work efficiency is good. This method is not suitable for cutting narrow areas such as between trees, and cannot be adjusted to an appropriate cutting width corresponding to the working area.

  Therefore, the problem of the present invention is to solve the above-mentioned problems, and a relatively large mowing apparatus attached to the tip of an arm of a heavy machine that is a large civil engineering machine vibrates due to the high-speed sliding operation of the blade. It is to make it difficult, and to provide a mowing apparatus that can be adjusted to an appropriate cutting width corresponding to the working area.

  In order to solve the above-described problems, in the present invention, a mowing apparatus having a hydraulic drive arm that can be flexed and extended and detachably attached to the tip of the arm of a self-propelled work machine, the mowing apparatus includes the hydraulic drive arm. When attached to the tip of the arm, it is provided so as to be able to rotate via a bearing and a rotary drive device, and the rotational power from a separately provided motor is transmitted to the gear transmission mechanism and the crank arm, and a pair of upper and lower sides from this crank arm There is provided a mechanism for transmitting linearly reciprocating power to the upper comb blade plate or the lower comb blade plate that is slidably overlapped and enabling pinching and cutting by relative reciprocal sliding of these comb blade plates. A counterweight having the same weight as the moving upper comb blade plate or the lower comb blade plate is provided, and a crank arm linked to the gear transmission mechanism is separately provided. Said counter weight via is to that the mowing device, characterized in that a mechanism for absorbing the inertial vibrations by the reciprocating operation in the reciprocating slide and opposite phase.

  When the mowing device according to the present invention configured as described above is attached to the tip of the hydraulic drive arm, rotational power from a separately provided motor is input from the gear transmission mechanism to the crank arm, The linear reciprocating power is transmitted to either the upper comb blade plate or the lower comb blade plate slidably stacked in a pair of upper and lower sides. Thereby, the relative reciprocation of the comb blade plates occurs, and the comb blade plates can be nipped and cut.

  At this time, the comb blade that reciprocates linearly is attached to a hydraulic drive arm such as a heavy machine, and is formed to be quite large or wide so as to increase the work efficiency. However, since the counterweight having the same weight as the upper comb blade plate or the lower comb blade plate is interlocked with the gear transmission mechanism by a separately provided crank arm, the inertia force is canceled and inertia vibration is eliminated, or Reduce to an extent that does not hinder mowing work.

  In order to prevent vibration due to inertia force generated when the comb blade plate is reciprocated in this way, the counter weight and the upper comb blade plate or the lower comb blade plate are reciprocated accurately in the opposite direction at the same speed. Although it is necessary, a gear transmission mechanism is adopted as a mechanism for that purpose, which has a simple structure and is easy to use.

  That is, the gear transmission mechanism includes a first gear to which rotational power is input and second and third gears that mesh with each other in a state of being in contact with the first gear. It is preferable that the second and third gears have the same diameter and a crank arm is provided at the same diameter position.

  In this case, since the second and third gears, which are the two gears that are in contact with the first gear, have the same diameter, they rotate in the opposite directions at the same rotational speed, and the crank arm and the counter weight are It reciprocates in the opposite phase to the comb blade plate to reliably absorb inertial vibration. In this case, the counter weight is preferably a counter weight having the same size and the same weight as the upper comb blade plate. It is also preferable that the lower comb blade plate is a double-edged blade and the counter weight is a second upper comb blade plate.

  In addition, the mowing device attached to the tip of the hydraulic drive arm is provided so as to be able to rotate through the bearing and the rotary drive device, and the hydraulic drive arm can bend and stretch by the rotary operation, When the mowing apparatus is moved by being self-propelled, the effective width capable of mowing can be changed, and thus mowing can be performed with an appropriate width from a narrow width to a wide width. The mowing device is attached to the tip of a hydraulic drive arm that can be bent and extended, and can freely change the height from the ground, that is, the cutting height. As such a working machine, a machine generally used as a heavy machine can be adopted.

  In the present invention, when the mowing device is attached to the tip of the arm of a work machine that has a hydraulic drive arm and is capable of self-propelling, it is provided so as to be able to rotate through the bearing and the rotary drive device. Correspondingly, it becomes a large-sized mowing device that can be adjusted to an appropriate cutting width. Also, a counter weight having the same weight as the upper comb blade plate or the lower comb blade plate reciprocatingly sliding is provided, and this counter weight is reciprocated in the opposite phase to the reciprocating sliding to absorb inertia vibration, so that a large-sized There is an advantage that the mowing apparatus is less susceptible to vibration due to the high-speed sliding operation of the blade.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the embodiment is a mowing apparatus 1 that has a hydraulic drive arm 2 that can be bent and extended, and is detachably attached to the tip of the arm of a shovel car that is a self-propelled working machine. is there.

  As shown in FIGS. 1 to 5, the mowing device 1 is provided so as to be rotatable through a rotary drive device such as a bearing 3, a gear and a motor when attached to the tip of the hydraulic drive arm 2, and provided separately. The rotational power from the electric motor 4 (see FIG. 3) is transmitted from the rotary shaft 5 to the first gear 6 and the gear transmission mechanism and the crank arm 9 including the second gear 7 and the third gear 8 meshing with the first gear 6. From the crank arm 9, a linear reciprocating power is transmitted to the former (upper comb blade plate 10) of the upper comb blade plate 10 and the lower comb blade plate 11 slidably overlapped in a pair of upper and lower sides, and fixed. The upper comb blade plate 10 can be sandwiched and cut by the reciprocating sliding of the upper comb blade plate 10 with respect to the lower comb blade plate 11.

  The mowing apparatus 1 is provided with a counterweight 12 having the same size and weight as the upper comb blade plate 10 that reciprocally slides, and a crank arm 13 interlocked with the third gear 8 of the gear transmission mechanism. The crank arm 9 is attached to a position having the same diameter as the position where it is attached to the second gear 7, and the counter weight 12 is reciprocated to the left and right in the opposite phase to the reciprocating sliding through the crank arm 13. The vibration due to the inertial force of the plate 10 is absorbed.

As shown in FIG. 1, the mowing device 1 and the tip of the hydraulic drive arm 2 are connected by first removing a hydraulic drive shovel or the like originally provided in a work machine such as a heavy machine together with a bracket, and replacing the mowing device with the bracket. A pin hole and a pin (or shaft) formed at one bracket 14 and the tip of the arm body 18 are rotatably attached, and an auxiliary swing near the tip of the piston 16 entering and exiting the hydraulic cylinder 15 and the arm body 18 is provided. The arm 17 and the bracket 14 are rotatably held by a single shaft.
When connected in this way, the mowing apparatus 1 is configured such that the comb blade plates 10 and 11 are tilted up and down by the movement of the piston 16, and this operation can be easily performed by the movement of the piston 16 of the hydraulic cylinder 15.

  As shown in FIG. 3, the rotary drive device such as the bearing 3 of the mowing device 1 transmits a hydraulic motor M (which may be an electric motor) provided between the pair of brackets 14 and the rotational force thereof. The radial bearing 3 has a known gear transmission mechanism (not shown), and employs a so-called slewing bearing having an inner gear on the inner peripheral surface of the inner ring. The force is transmitted and the entire mowing apparatus 1 is rotated by a required angle at the tip of the arm body 18 of the hydraulic drive arm 2 as necessary.

  As shown in FIGS. 2 to 5, the pinch cutting mechanism and the inertia vibration absorbing mechanism transmit the rotational power from the electric motor 4 to the first gear 6, and transmit the second gear 7 and the third gear 8 that mesh with the first gear 6. It is driven to rotate in the reverse direction, and is conducted to the crank arms 9 and 13 attached to the same positions of the second gear 7 and the third gear 8 by the rotation shafts, respectively, and from the one crank arm 9 to the upper comb blade plate 10 The reciprocating power to the left and right is transmitted to the counterweight 12, and the power reciprocating to the left and right from the crank arm 13 is also transmitted to the counter weight 12, and the two reciprocating motions are operated in opposite phases to absorb inertia vibration.

  As shown in FIGS. 2 to 4, the lower comb blade plate 11 is provided with a plurality of angled lower blades protruding forward at equal intervals on the front edge corresponding to one longitudinal edge of the rectangular substrate. The upper comb blade plate 10 is placed on the front edge of the lower comb blade plate 11 and the counter comb 12 having the same size and weight as the upper comb blade plate 10 is placed on the rear edge of the lower comb blade plate 11. It is on. As shown in FIG. 7, the upper comb blade plate 10 is provided with a number of trapezoidal upper blades protruding forward at equal intervals on the front edge corresponding to one longitudinal edge of the long plate shape.

  Then, a cover plate 20 is formed in the same size as the lower comb blade plate 11 by covering the upper and lower comb blade plates with the long holes 19 formed at the important points. The lower comb blade plate 11 and the cover plate 20 are provided at important points. The upper comb blade plate 10 and the counter weight 12 are rotatably connected to the tips of the crank arms 9 and 13 through the long holes 19.

  Also, as shown in FIGS. 2 to 4, the upper comb blade plate 10 and the counter weight 12 include a plurality of long guide holes 22 and 23 including at least both end portions so as to reciprocate in a fixed direction in the longitudinal direction. The guide pins 24 and 25 that pass through the guide long holes 22 and 23 are locked to the fitting holes 26 and 27 formed in the lower comb blade plate 11, and the cover plate 20. It is fixed with screws.

  As shown in FIGS. 1, 2, and 6, the upper and lower comb blade plates 10, 11 are provided so as to protrude forward from the front edge of the mowing device, ensuring the safety of the mowing worker, and the front weeds. A frame 28 is provided in order to eliminate obstacles hidden in the frame. The frame 28 is usually formed of a circular pipe made of metal or the like, and is fixed to both ends of the cover plate 20 with screws so that the height adjustment and the forward protruding length can be adjusted. And both pipes can be fixed to the locking holes 29 formed at a plurality of positions of the circular pipe with bolts and nuts 30.

  Further, as shown in FIG. 7, the lower blade of the lower comb blade plate 11 protrudes forward from the upper blade of the trapezoidal upper comb blade plate 10, and this configuration also eliminates obstacles, and It is possible to protect the blade.

  The mowing apparatus 1 of the embodiment configured as described above rotates the first gear 6 with the electric motor 4 while running the work machine and moving the hydraulic drive arm 2 as necessary, and thereby the second gear 7. The third gear 8 is driven to rotate, and the upper comb blade plate 10 and the counter weight 12 are simultaneously slid back and forth through the crank arms 9 and 13 in the reverse direction, so that the grass that enters between the upper blade and the lower blade is introduced. Or small trees can be cut and clipped by cutting, and at that time, the inertia vibration of the upper comb blade plate 10 is absorbed by the operation of the counter weight 12, and is trimmed or pruned neatly at a certain angle and height. Is possible.

  Further, as shown in FIG. 8, the mowing device 1 can be operated by inserting only the tip of the hydraulic drive arm 2 between the trees A narrower than the vehicle body width of the work machine by extending and contracting the hydraulic drive arm 2 with hydraulic pressure. As shown in FIG. 9, the height of the cutting can be arbitrarily set by adjusting the height of the hydraulic drive arm 2 by hydraulic pressure, the cut edges of the cut grass are aligned, and the rotary blade Compared to the case of mowing with, it is possible to perform much more beautiful mowing work or pruning work.

  Further, as shown in FIGS. 10 and 11, the maximum cutting width can be set to the same length as the mowing device 1, and this can be set to match the width of the vehicle body. By rotating at the tip of the hydraulic drive arm 2, the effective widths L1 and L2 that can be mowing can be changed, and thus mowing can be performed with an appropriate width from narrow to wide.

  Further, as shown in FIGS. 12 and 13, the hydraulic drive arm 2 is expanded and contracted by hydraulic pressure and the angle is changed to change the angle and position of the mowing device 1 and perform cutting in both the left and right and up and down directions. As a result, mowing work on slopes can be performed efficiently, and tree branches and pruning can be done in a short time.

The perspective view which shows the mowing apparatus of embodiment attached to the arm tip of a working machine Plan view of the embodiment Sectional view taken along line III-III in FIG. IV-IV sectional view of FIG. Sectional view taken along line V-V in FIG. Side view of essential part for explaining frame length adjusting mechanism of embodiment Main part enlarged plan view of the upper comb blade plate and the lower comb blade plate of the embodiment Explanatory drawing of the use state by trimming width adjustment of an embodiment Explanatory drawing of the use state by the cutting height adjustment of embodiment Explanatory drawing of the use state by trimming width adjustment of an embodiment Explanatory drawing of the use state by the normal cutting width of the embodiment Explanatory drawing of mowing work on sloping land using the embodiment Explanatory drawing of tree pruning and pruning work using the embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mowing apparatus 2 Hydraulic drive arm 3 Bearing 4 Electric motor 5 Rotating shaft 6 First gear 7 Second gear 8 Third gear 9, 13 Crank arm 10 Upper comb blade plate 11 Lower comb blade plate 12 Counter weight 14 Bracket 15 Hydraulic cylinder 16 Piston 17 Auxiliary swing arm 18 Arm body 19 Long hole 20 Cover plate 21 Bolt nut 22, 23 Guide long hole 24, 25 Guide pin 26, 27 Fitting hole 28 Frame 29 Locking hole 30 Bolt nut A Tree L1, L2 Effective width

Claims (4)

In a mowing apparatus that has a hydraulic drive arm that can bend and stretch and is detachably attached to the tip of the arm of a self-propelled work machine,
When this mowing device is attached to the tip of the hydraulic drive arm, it is provided so as to be able to rotate via a bearing and a rotary drive device, and the rotational power from a separately provided motor is transmitted to the gear transmission mechanism and the crank arm, From this crank arm, a pair of upper and lower slidably stacked upper comb blade plates or lower comb blade plates can transmit linearly reciprocating power, and the comb blade plates can be sandwiched and cut by relative reciprocal sliding. And a counterweight having the same weight as the reciprocating upper comb blade plate or the lower comb blade plate, and a separate crank arm linked to the gear transmission mechanism, and the counter via the crank arm. A mowing apparatus having a mechanism for absorbing inertia vibration by reciprocating the weight in a phase opposite to that of the reciprocating sliding.   The gear transmission mechanism includes a first gear to which rotational power is input and second and third gears meshed with the first gear. The crank arm is configured with the second and third gears having the same diameter. A mowing apparatus provided with a provided vibration absorbing mechanism.   The mowing apparatus according to claim 2, wherein the counter weight is a counter weight having the same size and the same weight as the upper comb blade plate.   The mowing apparatus according to any one of claims 1 to 3, wherein the work machine is a heavy machine.

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