JP2007278044A - Hydraulic shovel and three-point support mounting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multifunctional hydraulic shovel in which an attachment for an agricultural machine can be attached to a lower traveling body to improve work performance. <P>SOLUTION: The hydraulic shovel comprising the lower traveling body 2 including a crawler belt 1L, an upper rotary body 3 rotatably mounted on the lower traveling body 2, and an articulated working machine 5 elevatably mounted on the upper rotary body 3 includes a three-point support mounting means (an upper link 29 and a lower link 30L, for example) arranged on the lower traveling body 2 to mount the attachment for the agricultural machine (a cultivator 18, a mowing machine 48, a snowplow 50, etc., for example) in a manner of three-point support. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hydraulic excavator, and more particularly, to a hydraulic excavator and a three-point support attachment device that can attach an attachment for agricultural machinery to a lower traveling body.

  Generally, a hydraulic excavator is a lower traveling body provided with left and right endless track tracks (crawlers), an upper revolving body that is turnable on the lower traveling body, and a boom that is provided on the upper revolving body so as to be lifted and lowered. An articulated working machine (working device) including an arm and a bucket, and a soil removal plate provided rotatably on the front side of the lower traveling body (see, for example, Patent Document 1). A first bracket disposed at the center in the left-right direction and left and right second brackets disposed symmetrically about the first bracket are provided on the front side of the track frame constituting the lower traveling body. A support arm (stay) for the earth removal plate is rotatably coupled to the second bracket, and a hydraulic cylinder (for driving the earth removal plate) is provided between the first bracket and the earth removal plate. Elevating cylinder) is connected.

JP 2002-339387 A

  In the hydraulic excavator, various work attachments such as a breaker, a grapple, a crusher, and the like are known as what are attached to a work machine in place of a bucket in order to increase the number of functions. By the way, also in agricultural machines, such as a tractor, various attachments for agricultural machines, such as a tiller, a mower, and a snowplow, are known. Therefore, there has been a demand for attaching an attachment for agricultural machinery to the lower traveling body of the hydraulic excavator in order to further increase the functionality. However, the attachment for agricultural machinery has a structure that is attached by three-point support, and the attachment position dimension is standardized. For this reason, it is not easy to remove the earth removing plate from the bracket of the track frame and attach the attachment for agricultural machinery.

  The objective of this invention is providing the multifunctional hydraulic shovel which can attach the attachment for agricultural machines to a lower traveling body, and workability | operativity improves.

  (1) In order to achieve the above object, the present invention provides a lower traveling body having an endless track crawler, an upper revolving body provided on the lower traveling body so as to be able to swivel, and the upper revolving body capable of being elevated. A hydraulic excavator provided with an articulated working machine provided is provided with a three-point support attachment means that is disposed on the lower traveling body and attaches the agricultural machine attachment with a three-point support.

  The hydraulic excavator of the present invention is provided with three-point support attachment means (for example, an upper link and left and right lower links) for attaching the agricultural machine attachment to the lower traveling body with three-point support. Attach an attachment for agricultural machinery (in other words, an attachment that can be attached to an agricultural machine such as a tractor with a three-point support) by means. Thereby, the operation | work by the working machine in the turning range of an upper revolving body and the operation | work by the attachment for agricultural machines in the driving | running | working range of a lower traveling body can be performed. That is, for example, when a tiller is attached as an attachment for an agricultural machine, the field area in the turning range of the upper swinging body is roughened by the working machine, and the field area in the traveling range of the lower traveling body is plowed. Can be plowed by machine. Also, for example, when a mower is attached as an attachment for an agricultural machine and a mowing operation is performed, a tall plant in the swivel range of the upper swing body is chopped down by the work machine and a short plant in the travel range of the lower travel body Can be cut with a mower. For example, when a snow remover is attached as an attachment for an agricultural machine and the snow removal work is performed, the snow in the turning range of the upper traveling body is scraped by the working machine, and the snow in the traveling range of the lower traveling body is removed by the snow remover. be able to. Therefore, in the present invention, a multifunctional hydraulic excavator with improved workability can be realized.

  (2) In order to achieve the above object, the present invention also provides a lower traveling body having an endless track crawler, an upper revolving body provided on the lower traveling body so as to be able to swivel, and the upper revolving body can be elevated. In the hydraulic excavator provided with the multi-joint type working machine provided in the above, the lower traveling body is provided so as to be rotatable, and the upper link and the left and right lower links for attaching the attachment for agricultural machinery with three-point support, Left and right lift mechanisms that respectively support the left and right lower links, a hydraulic cylinder that rotates the left and right lower links, and an output that is provided on the lower traveling body and is connected to the rotation drive mechanism of the agricultural machine attachment A hydraulic motor having a shaft.

  (3) In order to achieve the above-mentioned object, the present invention also provides a lower traveling body having an endless track crawler, an upper revolving body provided on the lower traveling body so as to be able to swivel, and the upper revolving body can be elevated. A hydraulic excavator provided with a multi-joint type working machine provided on the lower traveling body and a drainage plate detachably attached to the bracket of the lower traveling body, the hydraulic excavator being attached to the bracket of the lower traveling body with the earthing plate removed. And a three-point support attachment device for attaching the attachment for agricultural machinery with three-point support.

  (4) In the above (3), preferably, the three-point support and attachment device is configured such that the left and right frame arms that can be rotatably attached to a bracket of the lower traveling body with the earthing plate removed. The frame main body is configured integrally with the left and right frame arms, and can be connected to the tip of a hydraulic cylinder rotatably provided on the lower traveling body, and the agricultural machine attachment provided on the frame main body can be supported at three points. An upper link for mounting and left and right lower links, and a hydraulic motor provided on the frame body and having an output shaft for connection to a rotation drive mechanism of the agricultural machine attachment.

  (5) In order to achieve the above-mentioned object, the present invention also provides a lower traveling body having an endless track crawler, an upper revolving body provided on the lower traveling body so as to be able to swivel, and the upper revolving body can be elevated. A three-point support and attachment device provided in a hydraulic excavator provided with an articulated work machine provided in the vehicle and a discharge plate that can be attached to and detached from the bracket of the lower traveling body, with the discharge plate removed The left and right frame arms that can be pivotably attached to the bracket of the lower traveling body, and the left and right frame arms are integrated with the front end of a hydraulic cylinder that is pivotally provided on the lower traveling body. A connectable frame main body, an upper link and a left and right lower link provided on the frame main body for mounting the attachment for agricultural machinery with three-point support, and an attachment for the agricultural machinery provided on the frame main body. And a hydraulic motor having an output shaft for connection to the instrument of the rotary drive mechanism.

  ADVANTAGE OF THE INVENTION According to this invention, the attachment for agricultural machines can be attached to a lower traveling body, and the multifunctional hydraulic shovel which improves workability | operativity can be implement | achieved.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing the overall structure of an embodiment of a hydraulic excavator according to the present invention, and shows a state in which a tiller is attached as an attachment for an agricultural machine. In the following, the driver's front side (left side in FIG. 1), rear side (right side in FIG. 1), left side (paper surface in FIG. 1) when the driver is seated in the driver's seat in the state shown in FIG. The front side) and the right side (back side toward the paper surface in FIG. 1) are simply referred to as front side, rear side, left side, and right side.

  In FIG. 1, a hydraulic excavator is mounted on a lower traveling body 2 provided with left and right endless track tracks (crawlers) 1L, 1R (only 1L shown in FIG. 1), and is pivotably mounted on the upper portion of the lower traveling body 2. And an articulated work machine (front device) 5 attached to a revolving frame 4 constituting a basic lower structure of the upper revolving body 3 so as to be rotatable in a vertical direction (can be lifted). For example, a cab type cab 6 provided on the swivel frame 4 and an upper cover 7 that covers most of the swivel frame 4 other than the cab 6 are provided.

  The work machine 5 includes a lower boom 8 that is coupled to the revolving frame 4 so as to be pivotable in the vertical direction, an upper boom 9 that is coupled to a distal end portion of the lower boom 8 so as to be pivotable in the left-right direction, and a distal end portion of the upper boom 9. The arm cylinder bracket 10 is connected to the front end of the arm cylinder bracket 10, the arm 11 is connected to the front end of the arm cylinder bracket 10 so as to be able to rotate up and down, and the front end of the arm 11 is up and down. The bucket 12 that is rotatably coupled, the stay 13 that connects the lower boom 8 and the arm cylinder bracket 10, the boom hydraulic cylinder 14 that drives the lower boom 8, and the upper boom 9 can be pivoted to the lower boom 8 in the left-right direction. An offset hydraulic cylinder 15 that is connected to drive the upper boom 9 and an arm hydraulic cylinder that drives the arm 11. And Sunda 16, and a bucket hydraulic cylinder 17 for driving the bucket 12.

  In the work machine 5 configured as described above, when the offset hydraulic cylinder 15 is extended, the upper boom 9 is turned by the stay 13 with the arm cylinder bracket 10 always facing the front of the hydraulic excavator. . That is, the upper boom 13 is turned in the left-right direction with the arm cylinder bracket 10, the arm 11, and the bucket 12 facing forward.

  And as a big feature of this embodiment, the lower traveling body 2 can attach an attachment for an agricultural machine (in other words, an attachment that can be attached to an agricultural machine such as a tractor by a three-point support) with a three-point support. It has a structure. Details of the structure of the lower traveling body 2 will be described below.

  FIG. 2 is a side view showing the structure of the track frame constituting the lower traveling body 2. FIG. 3 is a partially enlarged perspective view showing the mounting structure of the tiller 18 (for convenience, the upper swing body 3 is swung so that the work machine 5 is disposed on the rear side of the lower traveling body 2). Status).

  In FIGS. 2 and 3 and FIG. 1 described above, the substantially H-shaped track frame 19 is roughly divided into a center frame 20 and left and right sides provided on the left and right sides of the center frame 20 and extending in the front-rear direction. Frames 21L and 21R (however, only 21L is shown in FIG. 2). Left and right drive wheels 22L and 22R (only 22L shown in FIG. 1) are provided at the rear ends of the left and right side frames 21L and 21R, and the left and right drive wheels 22L and 22R respectively drive the drive wheels 22L and 22R. Traveling hydraulic motors 23L, 23R (however, only 23L is shown in FIG. 1) are provided. In addition, left and right driven wheels (idlers) 24L and 24R (supported by left and right side frames 21L and 21R) are rotatably supported on the front ends of the left and right side frames 21L and 21R and rotated by the driving force of the driving wheels 22L and 22R via the crawler belts 1L and 1R, respectively. 1 only 24L is shown).

  A substantially cylindrical round cylinder 25 is erected at the center of the center frame 20, and a turning device (not shown) having a turning hydraulic motor (not shown) is built between the round cylinder 25 and the turning frame 4. (Not shown) is provided, and the turning frame 4 is turned with respect to the center frame 20 by this turning device.

  A center joint (not shown) is provided at the center of the round cylinder 25 of the center frame 20. The center joint is not shown in detail, but the hydraulic pump and control valve on the upper revolving unit 3 side, and the hydraulic actuator on the lower traveling unit 2 side (for details, the above-described traveling hydraulic motors 23L and 23R, for lift described later) The hydraulic cylinders 33L and 33R and the attachment hydraulic motor 36 are connected to each other via a hydraulic hose or the like. The control valve controls the flow of pressure oil from the hydraulic pump to the hydraulic actuator according to the operation of operating means (for example, an operating lever, an operating pedal, etc., not shown) provided in the cab 6; A hydraulic actuator is driven.

  On the front side of the center frame 20, a first bracket 26 disposed at the center in the left-right direction, and left and right second brackets 27L and 27R disposed symmetrically around the first bracket 26 (however, in FIGS. 2 and 3) 27L only) and third brackets 28L and 28R are provided. An upper link 29 is rotatably connected to the first bracket 26, and left and right lower links 30L and 30R are rotatably connected to the second brackets 27L and 27R, respectively. The left and right lift arms 31L, 31R are rotatably coupled to the third brackets 28L, 28R, and the left and right lift rods 32L, 32R (however, in FIGS. 2 and 3) are connected to the tip ends of these lift arms 31L, 31R. 32L only is rotatably connected, and the tip ends of the lift rods 32L and 32R are rotatably connected to the lower links 28L and 28R, respectively. The lift arms 31L and 31R and the lift rods 32L and The left and right lift mechanisms are respectively constituted by 32R.

  Mounting holes 29a, 30La, and 30Ra (however, 30Ra in FIG. 2 is not shown) are formed at the tip portions of the upper link 29 and the lower links 30L and 30R, respectively, and pins are attached to these mounting holes 29a, 30La, and 30Ra. A cultivator 18 is attached via a device (not shown). Note that the upper link 26 and the lift rods 32L and 32R are each configured with a turnbuckle capable of adjusting the length, whereby the mounting position of the tiller 18 can be adjusted.

  The lift arms 31L, 31R are connected to each other via, for example, a connecting shaft (not shown) extending in the left-right direction, and left and right lift hydraulic cylinders 33L provided between the second brackets 27L, 27R, respectively. , 33R is rotated by a telescopic drive. As a result, the lower links 30L, 30R (and the upper link 29) rotate to change the position of the tiller 18.

  Further, a rotary rotation drive mechanism 34 (see FIG. 3) of the tiller 18 can be connected to a lower side (lower side in FIG. 2) of the first bracket 26 of the center frame 20 via a drive shaft (universal drive shaft) 35. An attachment hydraulic motor 36 having a simple output shaft (power take-off shaft) 36a is provided.

  In the present embodiment configured as described above, an attachment for an agricultural machine such as a tillage machine 18 (for example, a mower or a snow remover described later) can be attached to the lower traveling body 2, and an operation using the attachment for an agricultural machine is performed. be able to. The operation and effect of this embodiment will be described below.

(1) Cultivator The cultivator 18 shown in FIG. 1 is configured to cultivate the rotary 37 provided with a tilling claw (not shown) by rotating it. The cultivator 18 is attached to the three-point support via the upper link 26 and the left and right lower links 28L and 28R, and the rotary rotation driving mechanism 34 of the cultivator 18 is connected to the output shaft 36a of the attachment hydraulic motor 36. For example, when the driver operates the operating means in the cab 6 to drive the attachment hydraulic motor 36 while moving the hydraulic excavator backward, the rotary 37 of the cultivator 18 is driven via the rotary rotation drive mechanism 34. The field area in the traveling range of the lower traveling body 2 can be cultivated by the cultivator 18. Further, for example, when the driver operates the operating means in the cab 6 to turn the upper swing body 3 to drive the work implement 5, the field area in the turning range is roughened by the bucket of the work implement 5. be able to. In particular, depending on the shape of the field, there is a case where an area where the work by the cultivator 18 cannot be performed unless the excavator is turned back and aligned, and such an area can be worked by the work machine 5, so that workability is improved. improves.

(2) Mower (more)
A mower 38 shown in FIG. 4 is configured to crush vegetation by rotating a rotary 39 provided with a cutting blade. The mower 38 is attached to the three-point support via the upper link 26 and the left and right lower links 28L and 28R, and a rotary rotation driving mechanism (not shown) of the mower 38 is connected to the output shaft 36a of the attachment hydraulic motor 36. . Then, for example, when the driver operates the operation means in the cab 6 to drive the attachment hydraulic motor 36 while advancing the hydraulic excavator, the rotary 39 of the mower 38 is driven via the rotary rotation drive mechanism and travels. The vegetation in the area can be crushed. By the way, the height of the vegetation that is the cutting target of the mower 38 is somewhat limited. Therefore, for example, the driver operates the operating means in the cab 6 to turn the revolving structure 3 to drive the work machine 5 and cut down the vegetation within the turning range before performing the cutting work by the mower 38. Can do. Therefore, workability is improved.

(3) Snow remover A snow remover (snow blower) 40 shown in FIG. 5 is a device that rotates an auger (scraping blade) 41 to crush snow, and blows off the crushed snow from a shooter 42 by a blower (not shown). is there. The snow remover 40 is attached to the three points of support via the upper link 26 and the lower links 28L and 28R, and the rotation drive mechanism of the snow removal machine 18 (specifically, the rotation drive mechanism that distributes the rotational power to the auger 41 and the blower) is attached. This is connected to the output shaft 36 a of the hydraulic motor 36 for use. Then, for example, when the driver operates the operating means in the cab 6 to drive the attachment hydraulic motor 36 while moving the hydraulic excavator forward, the auger 41 and the blower of the snowplow 40 are driven via the rotation drive mechanism, Snow cover in the running range can be removed. Further, for example, the driver operates the operating means in the cab 5 to turn the upper swing body 3 to drive the work machine 5, and the snow in the turning range is scraped to the vicinity of the snow removal machine by the bucket of the work machine 5. After that, it is possible to perform snow removal work with a snow remover. Therefore, workability is improved.

  As described above, in the present embodiment, an attachment for an agricultural machine (for example, a field cultivator, a mower, a snowplow, etc.) can be attached to the lower traveling body 2 through the upper link 26 and the lower links 28L and 28R with three-point support. it can. Thereby, a multifunctional excavator with improved workability can be realized.

  In addition, as an attachment for agricultural machines, it is not restricted to the above-mentioned cultivator 18, the mower 38, and the snowplow 40. That is, for example, a soil removal board or the like may be attached as an attachment for an agricultural machine that does not have a rotation drive mechanism, and in this case, the same effect as described above can be obtained.

  In the first embodiment, the case where the upper link 29 and the lower links 30L and 30R are rotatably provided on the front side of the track frame 19 has been described as an example, but the present invention is not limited to this. That is, for example, the upper link 29 and the lower links 30 </ b> L and 30 </ b> R may be rotatably provided on the rear side of the track frame 19, and in that case, a soil discharge plate may be provided on the front side of the track frame 19. In such a case, the same effect as described above can be obtained.

  A second embodiment of the present invention will be described with reference to FIGS. This embodiment is an embodiment in which an attachment for an agricultural machine can be attached in place of the soil removal plate in a hydraulic excavator provided with a soil removal plate that can be attached to and detached from the lower traveling body. In addition, the same code | symbol is attached | subjected to the part equivalent to the said 1st Embodiment, and description is abbreviate | omitted suitably.

  FIG. 6 is a side view showing the entire structure of a hydraulic excavator provided with a soil removal plate that can be attached to and detached from the lower traveling body, to which the present invention is applied, and FIG. It is a side view showing a structure.

  6 and 7, the substantially H-shaped track frame 19 ′ is roughly divided into a center frame 20 ′ and left and right sides of the center frame 20, and extends in the front-rear direction, as in the above embodiment. It is composed of left and right side frames 21L and 21R (only 21L is shown in FIG. 7).

  On the front side of the center frame 20 ′, a first bracket 43 disposed in the center in the left-right direction, and left and right second brackets 44L and 44R disposed symmetrically around the first bracket 43 (however, only 44L in FIG. 7). Are provided). Support arms 46L and 46R (only 46L shown in FIGS. 6 and 7) of the earth removing plate 45 are rotatably coupled to the second brackets 44L and 44R, respectively. Between these, a hydraulic cylinder 47 for driving the earth discharging plate is connected.

  In this embodiment, the three-point support attachment device 48 (see FIGS. 8 to 11 described later) is attached to the second brackets 44L and 44R of the track frame 19 ′ with the support arms 46L and 46R of the earth removing plate 45 removed. ) And an attachment for an agricultural machine (for example, the tiller 18, the mower 38, and the snowplow 40) are attached to the three-point support attachment device 48 with three-point support. Details thereof will be described below.

  FIG. 8 is a side view showing the entire structure of the hydraulic excavator according to the present embodiment, and shows a state in which a cultivator 18 is attached as an attachment for an agricultural machine. FIG. 9 is a side view showing the structure of the track frame 19 'to which the three-point support attachment device 48 is attached. FIG. 10 is a side view showing the detailed structure of the three-point support mounting device 48, and FIG. 11 is a top view of the three-point support mounting device 48 viewed from the direction of arrow XI in FIG.

  8 to 11, the three-point support mounting device 48 can be rotatably mounted on the second brackets 46L and 46R of the track frame 19 ′ with the support arms 46L and 46R of the earth removing plate 45 removed. Left and right frame arms 49L, 49R, and a frame body 50 that is integrated with the frame arms 49L, 49R and that can be connected to the tip of the hydraulic cylinder 47. The three-point support mounting device 48 is rotated by the expansion and contraction drive of the hydraulic cylinder 47. The frame arms 49L, 49R are curved so that the dimension between the frame arms 49L, 49R decreases from the rear side toward the front side.

  On the front side of the frame body 50, an upper link 51 disposed at the center in the left-right direction, and left and right lower links 52L and 52R and lift rods 53L and 53R disposed symmetrically about the upper link are rotatable. Is provided. Mounting holes 51a, 52La, 52Ra (however, 52Ra in FIGS. 9 to 11 is not shown) are formed at the distal ends of the upper link 51 and the lower links 52L, 52R, respectively. These mounting holes 51a, 52La, 52Ra The cultivator 18 is attached via a pin or the like (not shown).

  The upper link 51 includes a turnbuckle that can be adjusted in length. The lift rods 53L and 53R are configured by turnbuckles whose lengths can be adjusted, and their front ends are connected to the lower links 52L and 52R, respectively. Further, side frames 54L and 54R are provided on both outer sides of the frame arms 49L and 49R, respectively, and tension links 55L and 55R whose lengths can be adjusted between the side frames 54L and 54R and the lower links 52L and 52R. Are provided. The lift rods 53L and 53R and the tension links 55L and 55R constitute left and right lift mechanisms that support the lower links 52L and 52R, respectively. And the attachment position of the tiller 18 can be adjusted by adjusting the length of the upper link 51, the lift rods 53L and 53R, and the tension links 55L and 55R.

  In addition, the frame main body 50 is disposed on the lower side (lower side in FIG. 2) of the upper link 51, and the rotary rotation driving mechanism 34 (see FIG. 3 described above) of the tiller 18 can be connected via the drive shaft 35. An attachment hydraulic motor 56 having an output shaft (not shown) is provided. Although not shown in detail, the attachment hydraulic motor 56 and the hydraulic cylinder 47 are connected to a control valve and a pump on the upper swing body 3 side through a hydraulic hose and a center joint, and are provided in the cab 6. The control valve is controlled and driven according to the operation of the operating means.

  In the present embodiment configured as described above, the earth removing plate is removed from the lower traveling body 2, and a three-point support attachment device 48 is attached instead of this, and an attachment for an agricultural machine (for example, an attachment to the three-point support attachment device 48 (for example, The tiller 18, the mower 38, the snowplow 40, etc.) can be attached. Therefore, as in the first embodiment, it is possible to realize a multifunctional hydraulic excavator that improves workability. Moreover, in this embodiment, since it can apply to the hydraulic shovel provided with the earth removal board 45 which can be attached or detached to the lower traveling body 2, it is convenient and can aim at cost reduction.

  In the second embodiment, the left and right lift rods 53L and 53R have been described by way of example of turnbuckles that can be adjusted in length. However, the present invention is not limited to this. That is, for example, one or both of the left and right lift rods 53L and 53R may be configured by a hydraulic cylinder. In such a case, the same effect as described above can be obtained.

  Moreover, in the said 2nd Embodiment, it demonstrated taking the case of connecting the hydraulic cylinder 47 and the three-point support attachment apparatus 48 which were connected to the earth removal board 45 in the state which removed the earth removal board 45. However, it is not limited to this. That is, for example, the hydraulic cylinder 47 may be replaced with a hydraulic cylinder for the three-point support and attachment device 48, and the hydraulic cylinder and the three-point support and attachment device 48 may be connected. In this case, the same effect as described above can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view showing the whole structure of 1st Embodiment of the hydraulic excavator of this invention, and represents the state which attached the tillage machine as an attachment for agricultural machines. It is a side view showing the detailed structure of the track frame which comprises 1st Embodiment of the hydraulic excavator of this invention. It is a partial expansion perspective view showing the attachment structure of the field cultivator in 1st Embodiment of the hydraulic excavator of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a side view showing the whole structure of 1st Embodiment of the hydraulic excavator of this invention, and represents the state which attached the mower as an attachment for agricultural machines. BRIEF DESCRIPTION OF THE DRAWINGS It is a side view showing the whole structure of 1st Embodiment of the hydraulic excavator of this invention, and represents the state which attached the snow removal machine as an attachment for agricultural machines. It is a side view showing the whole structure of the hydraulic excavator which is an application object of the present invention, and represents the state where the earth excavation board was attached. It is a side view showing the detailed structure of the track frame which comprises the hydraulic excavator which is the application symmetry of this invention, and represents the state which attached the earth removal board. It is a side view showing the whole structure of 2nd Embodiment of the hydraulic excavator of this invention, and represents the state which attached the cultivator as an attachment for agricultural machines. It is a side view showing the detailed structure of the track frame which comprises 2nd Embodiment of the hydraulic excavator of this invention, and represents the state which attached the attachment attachment apparatus for agricultural machines. It is a side view showing the detailed structure of the attachment mounting apparatus for agricultural machines which comprises 2nd Embodiment of the hydraulic excavator of this invention. It is a side view showing the detailed structure of the attachment mounting apparatus for agricultural machines which comprises 2nd Embodiment of the hydraulic excavator of this invention.

Explanation of symbols

1L, 1R Endless track crawler track 2 Lower traveling body 3 Upper turning body 5 Working machine 18 Tillage machine (Agricultural machine attachment)
29 Upper link 30L, 30R Lower link 31L, 31R Lift arm (lift mechanism)
32L. 32R Lift rod (lift mechanism)
33L, 33R Lift hydraulic cylinder 34 Rotary rotation drive mechanism 36 Attachment hydraulic motor 36a Output shaft 38 Mower (Agricultural machinery attachment)
40 Snowplow (Agricultural machine attachment)
44L, 44R Second bracket 45 Drain plate 47 Hydraulic cylinder 48 Three-point support mounting device 51 Upper link 52L, 52R Lower link 56 Attachment hydraulic motor 56a Output shaft

Claims (5)

In a hydraulic excavator comprising a lower traveling body equipped with an endless track crawler, an upper revolving body provided on the lower traveling body so as to be capable of swiveling, and an articulated work machine provided on the upper revolving body so as to be able to be lifted and lowered. ,
A hydraulic excavator, which is disposed on the lower traveling body and includes three-point support attachment means for attaching the attachment for agricultural machinery with three-point support. In a hydraulic excavator comprising a lower traveling body equipped with an endless track crawler, an upper revolving body provided on the lower traveling body so as to be capable of swiveling, and an articulated work machine provided on the upper revolving body so as to be able to be lifted and lowered. ,
An upper link and left and right lower links for attaching the attachment for agricultural machinery with three-point support, respectively, provided rotatably on the lower traveling body,
Left and right lift mechanisms that respectively support the left and right lower links;
A hydraulic cylinder for rotating the left and right lower links;
A hydraulic excavator, comprising: a hydraulic motor provided on the lower traveling body and having an output shaft for connection to a rotation drive mechanism of the agricultural machine attachment. A lower traveling body provided with an endless track, an upper revolving body provided on the lower traveling body so as to be able to swivel, an articulated working machine provided on the upper revolving body so as to be able to be lifted, and In a hydraulic excavator equipped with an earth plate that can be attached to and detached from the bracket,
A hydraulic excavator, comprising: a three-point support attachment device that is attached to the bracket of the lower traveling body in a state in which the earth removal plate is removed, and for attaching the agricultural machine attachment with three-point support.   4. The hydraulic excavator according to claim 3, wherein the three-point support and attachment device includes left and right frame arms that can be rotatably attached to a bracket of the lower traveling body in a state where the earthing plate is removed, and the left and right frames. A frame main body configured integrally with the arm and connectable to a tip of a hydraulic cylinder rotatably provided on the lower traveling body, and a three-point support for attaching the agricultural machine attachment provided on the frame main body A hydraulic excavator comprising an upper link and left and right lower links, and a hydraulic motor provided on the frame body and having an output shaft for connection to a rotation drive mechanism of the agricultural machine attachment. A lower traveling body provided with an endless track, an upper revolving body provided on the lower traveling body so as to be able to swivel, an articulated working machine provided on the upper revolving body so as to be able to be lifted, and A three-point support and attachment device provided in a hydraulic excavator provided with an earth plate detachable from a bracket,
The left and right frame arms that can be pivotally attached to the bracket of the lower traveling body with the earth removing plate removed, and the left and right frame arms are integrated with the lower traveling body and are rotatable relative to the lower traveling body. A frame main body connectable to a tip of a hydraulic cylinder provided; an upper link and left and right lower links provided on the frame main body for attaching an attachment for agricultural machinery with three-point support; and the agricultural machinery. And a hydraulic motor having an output shaft for connection to the rotational drive mechanism of the attachment.

Images