JP5270616B2 - Construction machine earth removal equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earth removal device of a construction machine capable of securing the joint strength of an arm and a blade and improving the workability of joint work compatibly. <P>SOLUTION: Left and right arms 22, 23 comprise left and right arm bodies 24, 25 and left and right connection members 29, 30. Also, the connection members 29, 30 are formed as a hollow box structure to be gradually spread open from an arm side joint part 31 to a blade side joint part 32 as a whole. Also, the connection members 29, 30 are integrally provided with horizontal reinforcing ribs 34, 35 and a vertical reinforcing rib 36. As a result, a joint length (welding length) of the joint part of a back surface of the blade 37 and the blade side joint part 32 is secured even without providing a reinforcing plate between the left and right arms 22, 23 and the blade 37, and the securement of the joint strength and the workability improvement of the joint work are achieved compatibly. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a soil removal device for a construction machine that is mounted on a construction machine such as a hydraulic excavator or a wheel loader and is preferably used for soil removal work such as earth and sand.

  In general, a hydraulic excavator as a construction machine has a vehicle body that includes a self-propelled lower traveling body and an upper revolving body that is rotatably mounted on the lower traveling body. A working device for excavating earth and sand is provided on the front side of the upper swing body so as to be able to move up and down, and an earth removing device for removing earth and sand is provided on the lower traveling body. Yes.

  Here, the excavator of the excavator usually has a left and right arm that extends forward and rearward and a base end side of which is rotatably attached to the lower traveling body, and a distal end side of the left and right arms. A blade extending in the left and right directions, and located between the left and right arms located behind the blade, and both left and right ends are joined to the left and right arms, respectively. It is roughly composed of a cylinder mounting beam and a blade cylinder located between the left and right arms and between the vehicle body and the cylinder mounting beam. By extending and contracting the blade cylinder, the left and right arms It is the structure which can rotate a blade up and down via the (up and down) (for example, refer patent document 1).

  When performing earth removal work such as earth and sand, for example, the left and right arms are rotated downward and the blades are grounded by running the hydraulic excavator with the blades in contact with the ground. The earth and sand are pushed out by the blade in the running direction and discharged. Thereby, the ground of the work site can be smoothed and leveled.

  By the way, at the time of earth removing work using the earth removing device, for example, when either one of the left end side and the right end side of the blade rides on a rock on the ground, it is inclined from the ground to the blade. A load may act, and in this case, stress concentrates on the joint between the blade and the left and right arms.

  On the other hand, for example, in the earth removal device disclosed in Patent Document 2, the tip portions of the left and right arms formed by rectangular cylinders having a rectangular cross section are joined to the back surface of the blade by welding, and the back surface of the blade A plurality of reinforcing plates are joined by welding between the left and right arms. By providing the reinforcing plate in this way, the strength of the joint portion between the tip portions of the left and right arms and the back surface of the blade is ensured.

JP 2004-353301 A Japanese Utility Model Publication No. 6-35350

  However, in the case of the earth removal device according to Patent Document 2, the number of parts increases as the reinforcing plate is provided, the weld length becomes excessively long, and the workability of the joining work decreases (the joining work takes time). There is a problem.

  The present invention has been made in view of the above-described problems of the prior art, and provides a soil removal device for a construction machine capable of ensuring both the joining strength between an arm and a blade and enhancing the workability of joining work. It is intended to provide.

  In order to solve the above-described problems, the present invention includes a left and right arm that extends in the front and rear directions and has a proximal end rotatably attached to a vehicle body of a construction machine, and a distal end side of the left and right arms. The blade for earth removal work provided extending left and right, and the left and right arms located on the rear side of the blade and positioned between the left and right arms are the left and right ends. A cylinder mounting beam joined to each of the arms, and a blade positioned between the left and right arms and disposed between the vehicle body and the cylinder mounting beam to rotate the blade upward and downward The present invention is applied to a soil removal device for a construction machine including a cylinder.

  The feature of the configuration adopted by the invention of claim 1 is that the left and right arms are composed of an arm main body to which the cylinder mounting beam is joined at an intermediate portion in the length direction, a tip portion of the arm main body, And a connecting member that is connected to the back surface of the blade and connects the two, and the connecting member is a cylindrical blade that is joined to the blade from a tubular arm-side joint joined to the arm body. That is, it is configured by a hollow box structure that gradually expands toward the side joint.

  According to a second aspect of the present invention, the connecting member includes a lateral reinforcement rib that extends toward the blade side joint portion while expanding left and right from the arm side joint portion, and an upper side from the arm side joint portion. , And longitudinal reinforcing ribs extending toward the blade side joints while expanding downward, and these arm side joints, blade side joints, lateral reinforcement ribs and vertical reinforcement ribs are integrally formed by casting means It is in the configuration.

  Furthermore, the invention of claim 3 is that an upper surface of the connecting member is provided with an inclined surface inclined obliquely downward from the arm body toward the left and right.

  According to the first aspect of the present invention, the left and right arms are constituted by the arm main body and the connecting member, and the connecting member is gradually expanded from the arm side joint portion toward the blade side joint portion. Since it is constituted by the body, it is possible to achieve both the securing of the joining strength between the arm and the blade and the improvement of the workability of the joining work.

  That is, since the blade side joint is expanded (expanded) compared to the arm side joint on the back of the blade, the joint length (welding) of the joint between the blade side and the back of the blade Length) can be secured. In addition, by configuring the connecting member with a hollow box structure, the outer shell (peripheral portion) of the connecting member can also serve as a reinforcing plate. Therefore, the stress concentration at the joint can be reduced without providing a reinforcing plate between the left and right arms and the blade, and the strength of the joint between the left and right arms and the blade is ensured. be able to. Since the reinforcing plate is unnecessary, the number of parts and the number of welding processes can be reduced, and workability when joining the left and right arms and the blade can be improved.

  According to the invention of claim 2, the connecting member is configured to integrally form the arm side joint portion, the blade side joint portion, the horizontal reinforcing rib and the vertical reinforcing rib by the casting means, and thus serves as a reinforcing plate. The connecting member of the hollow box structure in which the horizontal reinforcing rib and the vertical reinforcing rib are integrally provided can be easily formed.

  Further, according to the invention of claim 3, since the inclined surface is provided on the upper surface of the connecting member, it is possible to reduce the accumulation of debris exceeding the blades on the upper surface of the connecting member at the time of soil removal work or the like. It is possible to simplify the cleaning work.

It is a front view which shows the hydraulic excavator provided with the earth discharging apparatus by embodiment of this invention. It is a top view which shows the lower traveling body and soil removal apparatus in FIG. It is a top view which shows a left and right arm, a blade, a cylinder mounting beam, and the like. It is a disassembled perspective view of a left arm. It is a perspective view which shows a connection member alone. It is an expanded sectional view seen from the arrow VI-VI direction in FIG. 3 which shows a connection member, a braid | blade, etc. It is an expanded sectional view seen from the arrow VII-VII direction in FIG. 3 which shows a connection member, a braid | blade, etc. It is a top view which changes the length of an arm main body, an arm main body, a connection member, a braid | blade, etc. are shown.

  Hereinafter, the soil removal apparatus for construction machines according to the present invention will be described in detail with reference to the accompanying drawings, taking as an example the case of application to a soil removal apparatus for a hydraulic excavator.

  In the figure, reference numeral 1 denotes a hydraulic excavator as a typical example of a construction machine. A body of the hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2 and a swiveling wheel 3 on the lower traveling body 2. The upper revolving unit 4 is mounted so as to be capable of swiveling. A swing type working device 5 is provided on the front side of the upper swing body 4 so as to be swingable leftward and rightward, and capable of being lifted up and down. For excavation work.

  Here, the lower traveling body 2 of the excavator 1 has a track frame 6 serving as a base, and as shown in FIGS. 1 and 2, the track frame 6 is a center frame located at the center in the left and right directions. 6A, the left and right side frames 6B arranged on the left and right sides of the center frame 6A and extending in the front and rear directions, and the center frame 6A and the left and right side frames 6B are connected to each other. The front and rear legs 6C and 6C are generally configured.

  Further, on the front end side of the center frame 6A that constitutes the track frame 6, a traveling body side cylinder bracket 6D that is disposed in a central portion in the left and right directions and to which a later-described blade cylinder 40 is attached is sandwiched between the traveling body side cylinder bracket 6D. The left and right arm brackets 6E and 6F, which are arranged on both the left and right sides and to which the base ends of the left and right arms 22 and 23, which will be described later, are attached, are provided to protrude forward. A swivel wheel 3 is attached to the upper surface side of the center frame 6A.

  Further, the left and right side frames 6B constituting the track frame 6 are provided with driving wheels 7 located on one end side in the front and rear directions and idler wheels 8 located on the other end side. A crawler belt 9 is wound around the idler wheel 8.

  On the other hand, the upper swing body 4 of the excavator 1 is disposed on the left side of the swing frame 10 and the swing frame 10 as a base mounted on the track frame 6 (center frame 6A) via the swing wheel 3. Is substantially constituted by a driver seat 11 on which is seated, a counterweight 12 disposed on the rear end side of the revolving frame 10 to balance the weight with the work device 5, and a canopy 13 covering the upper side of the driver seat 11.

  Next, reference numeral 21 denotes a soil removal apparatus according to the present embodiment. This earth removing device 21 is provided on one side (for example, the front side) of the lower traveling body 2 in the front and rear directions, and for example, earth removing work for removing earth and sand excavated by using the working device 5 and snow removal. The work is performed. The earth removal device 21 includes left and right arms 22 and 23, a blade 37, a cylinder mounting beam 38, a blade cylinder 40, and the like, which will be described later.

  22 and 23 are a pair of left and right arms attached to the center frame 6A of the track frame 6. These left and right arms 22 and 23 extend forward from the center frame 6A, and the left and right tracks 9 It protrudes further forward than the front end. As shown in FIG. 3 and the like, the left and right arms 22 and 23 are integrally connected by a cylinder mounting beam 38, which will be described later. The blade 37 is configured to be attached. Here, the left and right arms 22 and 23 are composed of left and right arm bodies 24 and 25, left and right connecting members 29 and 30 described later, and the like.

  Reference numerals 24 and 25 denote left and right arm bodies to which cylinder mounting beams 38, which will be described later, are respectively joined at intermediate positions in the length direction. Each arm body 24 and 25 includes a straight portion 26 extending in the front and rear directions. The mounting bracket 27 is provided at the rear end of the straight portion 26 and is rotatably attached to the track frame 6.

  Here, for example, as shown in FIG. 4, the straight portion 26 is formed of a rectangular tube having a square cross-sectional shape surrounded by an upper surface 26A, a lower surface 26B, and left and right side surfaces 26C and 26C. A mounting bracket 27 is joined to the base end side (rear end side) of the straight portion 26 by means of welding or the like. The mounting bracket 27 is provided on the left and right sides of the track frame 6 (center frame 6A). The right arm brackets 6E and 6F are pin-coupled via connecting pins 28 and 28 so as to be rotatable upward and downward.

  Reference numerals 29 and 30 denote left and right connecting members respectively provided between the left and right arm bodies 24 and 25 and a blade 37 which will be described later. The left connecting member 29 includes a tip of the arm body 24 and a blade. 37 is joined to the back surface (rear plate 37 </ b> B) of the arm 37 to connect the two, and the right connecting member 30 is joined to the tip of the arm body 25 and the rear surface of the blade 37 to connect the two. . Here, each connection member 29 and 30 is comprised by the below-mentioned arm side junction part 31, the blade side junction part 32, the horizontal reinforcement ribs 34 and 35, the vertical reinforcement rib 36, etc. FIG.

  Each of the connecting members 29 and 30 is configured as a hollow box structure that gradually expands from the arm-side joint 31 to the blade-side joint 32 as a whole, and the arm-side joint 31 and the blade-side joint. The portion 32, the lateral reinforcing ribs 34 and 35, and the vertical reinforcing rib 36 are configured to be integrally formed using casting means. Since the left and right connecting members 29 and 30 have the same configuration except that they are left and right symmetrical, the left connecting member 29 will be mainly described below.

  Reference numeral 31 denotes a cylindrical arm-side joint portion joined to the arm body 24. The arm joint portion 31 is configured as, for example, a bottomed rectangular tube having a cross-sectional shape substantially similar to the straight portion 26 of the arm body 24. A substantially rectangular fitting part 31A for fitting the straight part 26 of the arm body 24 is provided in the opening. Then, in a state where the distal end side opening of the linear portion 26 of the arm body 24 is fitted to the fitting portion 31 </ b> A of the arm side joining portion 31, the arm side joining portion 31 and the opening peripheral edge portion of the arm body 24 extend over the entire circumference. By performing welding, the distal end portion of the arm main body 24 and the connecting member 29 are joined.

  Reference numeral 32 denotes a cylindrical blade side joint portion joined to the back surface (rear plate 37B) of the blade 37, which will be described later. The blade side joint portion 32 has a substantially triangular opening edge 32A that matches the back surface of the blade 37. It is comprised as a bottomed cylinder which has. That is, the blade side joint portion 32 includes an upper plate portion 34A, a lower plate portion 34B, a rear plate portion 34C that constitute a later-described lateral reinforcing rib 34, a longitudinal plate portion 36A that constitutes a later-described longitudinal reinforcing rib 36, and a curved plate. A bottomed cylinder is formed by the portion 36B, and an opening edge 32A that contacts the back surface of the blade 37 is formed in a substantially triangular shape.

  Then, with the blade-side joint portion 32 in contact with the back surface of the blade 37, welding is performed on the outer edge of the blade-side joint portion 32 over the entire periphery, as shown in FIG. The member 29 is joined to the welded portion 33.

  Reference numerals 34 and 35 denote a pair of lateral reinforcing ribs extending toward the opening edge 32A of the blade side joint portion 32 while expanding from the arm side joint portion 31 in the left and right directions. The connecting member 29 is provided on both the left and right sides with a vertical reinforcing rib 36 to be described later interposed therebetween.

  Here, of the lateral reinforcement ribs 34 and 35, one lateral reinforcement rib 34 located on the outer side in the width direction of the vehicle body, that is, one located on the left side in the left connection member 29 (on the right side in the right connection member 30). The lateral reinforcing ribs 34 are an upper plate portion 34A and a lower plate portion 34B that face each other in the upward and downward directions, and a rear plate portion 34C that closes the rear edge of the upper plate portion 34A and the lower plate portion 34B. It is comprised by.

  The upper plate portion 34A is formed in a substantially triangular shape when viewed from above, and is smoothly continuous with the upper surface of the arm side connection portion 31 and a curved plate portion 36B of a vertical reinforcing rib 36 described later. The lower plate portion 34B is formed in a substantially similar triangular shape to the upper plate portion 34A, and smoothly continues to the lower surface of the arm side connecting portion 31 and the lower surface of the other lateral reinforcing rib 35 described later. Further, the rear plate portion 34 </ b> C is smoothly continuous with the side surface of the arm-side connection portion 31.

  Further, the upper plate portion 34A is inclined obliquely downward from the arm side connection portion 31 in the left and right directions. That is, by setting the upper surface of the upper plate portion 34A to the inclined surface 34A1 inclined obliquely downward toward the left and right directions, the debris that exceeds the blade 37 during the earth removal work or the like is placed on the upper surfaces of the connecting members 29 and 30. The accumulation is suppressed.

  On the other hand, of the lateral reinforcing ribs 34 and 35, the other lateral reinforcing rib 35 positioned on the inner side in the width direction of the vehicle body, that is, the other of the left connecting member 29 positioned on the right side (left side of the left connecting member 30). The lateral reinforcing rib 35 is formed as a substantially tetrahedral solid. The lower surface of the other horizontal reinforcing rib 35 is smoothly continuous with the lower surface of the lower plate portion 34B of the one horizontal reinforcing rib 34. Further, the side surface of the other horizontal reinforcing rib 35 is smoothly continuous with the side surface of a vertical plate portion 36A of the vertical reinforcing rib 36 described later.

  Reference numeral 36 denotes a longitudinal reinforcing rib extending toward the opening edge 32A of the blade side joint portion 32 while expanding upward and downward from the arm side joint portion 31, and the longitudinal reinforcement rib 36 is a pair of connecting members 29. It is provided between the lateral reinforcing ribs 34 and 35 so as to extend in the front and rear directions. Here, the vertical reinforcing rib 36 includes a vertical plate portion 36A that gradually increases in height from the arm-side joint portion 31 toward the blade 37 side, and stands substantially vertically in the vertical direction, and an upper end edge of the vertical plate portion 36A. To the upper plate portion 34A of one of the lateral reinforcing ribs 34, and a curved plate portion 36B extending in a concave curve and smoothly continuing to the upper surface of the upper plate portion 34A.

  Then, the blade side joint portion 32 is constituted by the vertical plate portion 36A and the curved plate portion 36B constituting the vertical reinforcing rib 36, and the upper plate portion 34A, the lower plate portion 34B and the rear plate 34C constituting one horizontal reinforcing rib 34. The opening edge portion 32A is configured.

  37 is a blade (soil removal board) provided on the front end side of the left and right arms 22 and 23, and the blade 37 is in front of the front end portions of the left and right crawler belts 9 as shown in FIG. It is arranged and extends in the left and right directions with a width dimension substantially equal to the width dimension (vehicle width) of the left and right crawler belts 9. The blade 37 pushes the earth and sand piled up on the ground in the running direction and discharges it by running the excavator 1.

  Here, as shown in FIG. 7, the blade 37 is formed using a plate body such as a steel plate material, and has a gentle concave curved cross-sectional shape extending upward and downward, and a reverse L A rear plate 37B having a letter-shaped cross section and joined to the rear side of the front plate 37A, and a thick plate extending in the left and right directions, joined to the lower end side of the front plate 37A and protrudes obliquely downward. The cutting edge 37C, and the front plate 37A, the rear plate 37B, and the left and right side plates 37D and 37D joined to the left and right ends of the cutting edge 37C are roughly configured.

  The front end portions of the left and right arms 22 and 23 are joined to the rear surface plate 37B of the blade 37 via the left and right connecting members 29 and 30.

  38 is a cylinder mounting beam located between the left and right arms 22 and 23 located behind the blade 37, and the cylinder mounting beam 38 is formed of a cylindrical body extending in the left and right directions. Both left and right end portions are joined to intermediate portions in the length direction of the left and right arms 22 and 23, that is, the straight portions 26 of the left and right arm bodies 22 and 23, respectively. . The cylinder mounting beam 38 integrally connects the left and right arms 22 and 23 and a blade cylinder 40 to be described later.

  Reference numeral 39 denotes a pair of left and right cylinder mounting brackets provided on the cylinder mounting beam 38. The pair of cylinder mounting brackets 39 are attached to the bottom side of a blade cylinder 40 described later.

  A blade cylinder 40 is located between the left and right arms 22 and 23 and is provided between the track frame 6 of the lower traveling body 2 and the cylinder mounting beam 38. The blade cylinder 40 includes the left and right arms. A blade 37 provided on the tip side of the arms 22 and 23 is rotated upward and downward.

  Here, the bottom side of the blade cylinder 40 is rotatably connected to a cylinder mounting bracket 39 of the cylinder mounting beam 38 via a connecting pin 41, and the rod side of the blade cylinder 40 is driven by the track frame 6. The body side cylinder bracket 6D is connected to the body side cylinder bracket 6D via a connection pin 42 so as to be rotatable.

  Therefore, by extending and contracting the blade cylinder 40, the blade 37 is moved upward and downward around the connecting pin 28 that connects the left and right arms 22 and 23 and the left and right arm brackets 6E and 6F of the track frame 6. It is configured to rotate downward.

  The earth excavator 21 of the hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 is self-propelled to the work site by the lower traveling body 2 and then, for example, rotates the upper revolving body 4. While the working device 5 is moved upside down, excavation work such as earth and sand can be performed.

  On the other hand, when the earth and sand excavated and piled up on the ground are discharged, the blade 37 is rotated downward via the left and right arms 22 and 23 by extending the blade cylinder 40, and the blade 37 The cutting edge 37C is grounded to the ground. By running the excavator 1 in this state, the earth and sand accumulated on the ground can be discharged so as to be pushed out in the running direction by the blade 37, and the leveling work at the work site and the earth backfilling work Etc. can be performed.

  Here, at the time of the above earth removal work, for example, when either one of the left end side and the right end side of the blade 37 rides on a rock on the ground, the oblique direction from the ground to the blade 37 As a result, the stress concentrates on the joint between the left and right arms 22 and 23 and the blade 37.

  On the other hand, the earth removal device 21 according to the present embodiment includes left and right arms 22 and 23 constituted by arm main bodies 24 and 25 and connecting members 29 and 30, and the arm side of the connecting members 29 and 30. Since the blade side joint portion 32 that is expanded (expanded) compared to the joint portion 31 is joined to the back surface of the blade 37, the joining length of the joint portion between the back surface of the blade 37 and the blade side joint portion 32 is used. A large (welding length) can be secured.

  In addition, lateral reinforcement ribs 34 and 35, which constitute the outline of each of the connection members 29 and 30, and function as a reinforcing plate, and the vertical reinforcement rib 36 are integrally formed on the outer periphery (peripheral portion) of the connection members 29 and 30. It is set as the structure provided.

  Therefore, even if a reinforcing plate is not provided between the left and right arms 22 and 23 and the blade 37, the stress concentration at the joint between the left and right arms 22 and 23 and the blade 37 can be reduced. The strength of the joint between the left and right arms 22 and 23 and the blade 37 can be ensured. Since the reinforcing plate is unnecessary, the number of parts and the number of welding processes can be reduced, and workability when joining the left and right arms 22 and 23 and the blade 37 can be improved.

  Further, since the connecting members 29 and 30 are configured such that the arm side joint portion 31, the blade side joint portion 32, the lateral reinforcing ribs 34 and 35 and the vertical reinforcing rib 36 are integrally formed by casting means, the connecting members 29 and 30 serve as a reinforcing plate. The connecting members 29 and 30 of a hollow box structure in which the horizontal reinforcing ribs 34 and 35 and the vertical reinforcing ribs 36 are integrally provided can be easily formed.

  Further, since the upper plate portion 34A of one of the lateral reinforcing ribs 34 is inclined obliquely downward toward the left and right directions, the inclined surfaces 34A1 are provided on the upper surfaces of the connecting members 29 and 30, so the earth removal work It is possible to reduce accumulation of debris exceeding the blade 37 on the upper surfaces of the connecting members 29 and 30 at times, and simplification of cleaning work and the like can be achieved.

  Since the arms 22 and 23 are constituted by the arm bodies 24 and 25 and the connecting members 29 and 30, the arm bodies 24 and 24 'having different lengths are attached to the connecting member 29 as shown in FIG. Can do. That is, when the length direction of the straight portion 26 constituting the arm main body 24 is A, the arm main body 24 ′ having the straight portion 26 ′ having a length dimension B larger than the length dimension A is connected to the connecting member 29. By attaching to the arm 22, 22 ′ having different lengths can be configured. In other words, by using the connecting member 29, the blade 37, and the support bracket 27 as common parts, and changing the length of the linear portion 26, a soil removal device having different lengths from the track frame 6 to the blade 37 is configured. The cost can be reduced by sharing parts.

1 Excavator (construction machine)
21 Earthmoving device 22, 22 ', 23 Left, right arm 24, 24', 25 Left, right arm body 29, 30 Left, right connecting member 31 Arm side joint 32 Blade side joint 34, 35 Horizontal Reinforcement rib 34A1 Inclined surface 36 Vertical reinforcement rib 37 Blade 38 Cylinder mounting beam 40 Blade cylinder

Claims (3)

Left and right arms that extend in the front and rear directions, and whose base end side is pivotally attached to the body of the construction machine, and soil that extends in the left and right directions at the distal ends of the left and right arms A working blade, and a cylinder mounting beam located between the left and right arms located behind the blade and having both left and right ends joined to the left and right arms, respectively. A soil removal device for a construction machine, comprising: a blade cylinder positioned between the left and right arms and provided between the vehicle body and the cylinder mounting beam to rotate the blade upward and downward. In
The left and right arms include an arm main body to which the cylinder mounting beam is bonded at an intermediate portion in the length direction, and a connecting member that is connected to the tip of the arm main body and the back surface of the blade to connect the two. The connecting member is a hollow box structure that gradually expands from a cylindrical arm-side joint joined to the arm body toward a cylindrical blade-side joint joined to the blade. A soil removal device for construction machinery, characterized by comprising a body.   The connecting member includes a lateral reinforcing rib that extends toward the blade side joint while expanding left and right from the arm side joint, and the above while expanding upward and downward from the arm side joint. The longitudinal reinforcing rib extending toward the blade side joint, and the arm side joint, the blade side joint, the lateral reinforcement rib, and the vertical reinforcement rib are integrally formed by casting means. Construction machinery earth removal equipment.   The soil removal apparatus for a construction machine according to claim 1 or 2, wherein an upper surface of the connecting member is provided with an inclined surface inclined obliquely downward toward the left and right directions from the arm body.

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