JP2009102849A - Construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide construction machinery capable of facilitating the operation of replacing a quarrying reinforcement structure. <P>SOLUTION: In this construction machinery in which the quarrying reinforcement structure is provided on the undersurface of an arm for rotatably supporting a bucket, the quarrying reinforcement structure is at least partially and detachably connected to the undersurface of the arm. In this case, preferably, the quarrying reinforcement structure is composed of square timber and a reinforcing plate, and the square timber is bolted to the reinforcing plate which is joined to the undersurface of the arm. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a construction machine having a reinforcing structure on a lower surface of an arm.

Conventionally, in order to prevent the bottom surface of the track frame from being damaged by the collision of rocks or the like when traveling on rough terrain, the center frame is protected between the side frames and covers the bottom surface of the center frame. A construction machine in which a plate is detachably attached is known (for example, see Patent Document 1).
JP 2001-271379 A

  By the way, in a construction machine that performs various operations, a reinforcing structure may be provided on the lower surface of the arm so that the lower surface of the arm is not damaged. This reinforcing structure usually includes a square bar and a reinforcing plate. The reinforcing plate is welded to the lower surface of the arm, and the square bar is welded to the reinforcing plate. However, since the timber is worn out by colliding with rocks or the like during work, it is necessary to replace the timber at an appropriate stage. In this respect, in the configuration in which the square bar is welded to the lower surface of the arm, it is difficult to remove the old square bar, and there is a problem that the replacement work becomes complicated.

  Accordingly, an object of the present invention is to provide a construction machine capable of facilitating replacement work of a reinforcing structure.

To achieve the above object, the present invention provides a construction machine including a reinforcing structure on the lower surface of an arm.
At least a part of the reinforcing structure is detachably coupled to the lower surface of the arm.

  ADVANTAGE OF THE INVENTION According to this invention, the construction machine which can facilitate replacement | exchange work of a reinforcement structure is obtained.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram schematically showing an entire construction machine 100 according to an embodiment of the present invention. A construction machine 100 according to the present embodiment is a hydraulic excavator that is a traveling construction machine, and includes a lower traveling body 102, an upper revolving body 101 that is disposed on the upper side of the lower traveling body 102, and an upper revolving body. A mechanism 103a, 103b, 103c that is provided in 101 and performs various operations, and hydraulic cylinders 104a, 104b, 104c that operate the mechanisms 103a, 103b, 103c are configured. Although not shown, the hydraulic pressure generated in the hydraulic cylinders 104a, 104b, 104c is generated by driving a hydraulic pump using the engine as a power source, and is controlled by a microcomputer and a hydraulic circuit.

  The mechanism 103a is a mechanism that rotatably supports the boom with respect to the upper swing body 101, and the position (movement) of the boom 109 with respect to the upper swing body 101 is controlled by the hydraulic pressure of the hydraulic cylinder (boom cylinder) 104a. . The mechanism 103b is a mechanism that rotatably supports the arm 108 with respect to the boom 109, and the position (movement) of the arm 108 with respect to the boom 109 is controlled by the hydraulic pressure of the hydraulic cylinder (arm cylinder) 104b. The mechanism 103c is a mechanism that rotatably supports the bucket 106 with respect to the arm 108. The position (movement) of the bucket 106 with respect to the arm 108 is controlled by the hydraulic pressure of the hydraulic cylinder (bucket cylinder) 104c. Note that the mechanisms 103a, 103b, and 103c are not necessarily the above-described rotation mechanism, and may be an expansion / contraction mechanism (slide mechanism) or a combination mechanism thereof.

  FIG. 2 is a diagram illustrating an example of the arm 108, FIG. 2A is a diagram illustrating a side surface of the arm 108, and FIG. 2B is a diagram illustrating a lower surface of the arm 108.

  As shown in FIGS. 2A and 2B, the lower surface of the arm 108 is provided with a quarry reinforcement structure 110 so that the lower surface of the arm 108 is not damaged. The quarry reinforcement structure 110 includes a square member 114 and a reinforcement plate 112.

  The reinforcing plate 112 is made of a sheet metal plate having a relatively large thickness (for example, 6 mm). The reinforcing plate 112 has a relatively large outer shape that covers the entire lower surface from the tip of the arm 108. The reinforcing plate 112 is formed with a screw hole 113 (see FIG. 3) into which a bolt 116 described later is screwed. The reinforcing plate 112 is joined to the lower surface of the arm 108 by welding or the like.

  The square member 114 is a solid square member having the bolt receiving hole 118 and the bolt insertion hole 120, and has a very large thickness h (for example, 32 mm). The bolt accommodation hole 118 has a space for receiving a tool for fastening a bolt 116 described later. As shown in FIGS. 2A and 2B, a plurality of square members 114 are arranged on the lower surface of the arm 108 along the extending direction of the arm 108. In the illustrated example, the adjacent square members 114 are spaced apart from each other. However, the adjacent square members 114 may be disposed so as to contact each other, or a larger number of larger square members 114 may be disposed. May be.

  FIG. 3 is a diagram showing details of the method of connecting the quarry reinforcement structure 110 to the lower surface of the arm 108, and is a cross-sectional view taken along line AA in FIG.

  As shown in FIG. 3, the square member 114 is fastened to the reinforcing plate 112 by bolts 116. As shown in FIG. 3, the head of the bolt 116 is housed in the bolt housing hole 118, and is screwed into the screw hole 113 of the reinforcing plate 112 through the bolt insertion hole 120. Thereby, the square member 114 is coupled to the lower surface of the arm 108 via the reinforcing plate 112. The joining position of the square member 114 with respect to the reinforcing plate 112, that is, the fastening position of the bolt 116 may be set at an appropriate interval of, for example, a 100 mm pitch.

  According to the construction machine 100 according to the present embodiment described above, the following excellent effects can be obtained.

  According to the present embodiment, for example, even when the square member 114 of the quarry reinforcement structure 110 is worn out by quarrying work over a long period of time, the worn square member 114 can be easily removed by loosening the bolt 116. Exchange work can be facilitated. In addition, since the welding work is not involved in the re-work of the square member 114, the replacement operation of the square member 114 becomes easy. In addition, by setting various types of square bars 114, it is possible to select the reinforcing type square bars 114 according to the site. In this case, the square members 114 in various forms may have the bolt receiving holes 118 and the bolt insertion holes 120 having a pitch corresponding to the screw holes 113 formed in the reinforcing plate 112 in common.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, in the embodiment described above, only the square member 114 of the quarry reinforcement structure 110 is detachably coupled to the lower surface of the arm 108, but both the square member 114 and the reinforcing plate 112 are detachable to the lower surface of the arm 108. It may be combined. For example, a screw hole may be provided on the lower surface of the arm 108, and both the square member 114 and the reinforcing plate 112 may be fastened together with a bolt such as the bolt 116 described above. Alternatively, a screw hole may be provided on the lower surface of the arm 108, and the reinforcing plate 112 to which the square member 114 is welded may be bolted to the lower surface of the arm 108.

  In the above-described embodiment, the quarry reinforcement structure 110 is composed of the square member 114 and the reinforcement plate 112. For example, the lower surface of the arm 108 is configured to be thick enough to function as a reinforcement plate. In such a case, the reinforcing plate 112 may be omitted.

  Moreover, the Example mentioned above is related with the quarrying (crushed stone) reinforcement structure 110 as a preferable Example. This is because in the quarrying work, a stone or the like is sandwiched between the lower surface side of the arm 108 and the bucket 106, and therefore the lower surface of the arm 108 is easily damaged. However, the quarry reinforcement structure 110 according to the above-described embodiment may be applied to the lower surface of the arm of a construction machine that performs work other than quarrying work as a normal reinforcement structure.

It is a figure showing roughly the whole of one example of construction machine 100 by the present invention. FIG. 2A is a diagram showing a side surface of the arm 108, and FIG. 2B is a diagram showing a lower surface of the arm 108. It is a figure which shows the detail of the connection method of the quarry reinforcement structure 110 to the lower surface of the arm 108. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Construction machine 101 Upper revolving body 102 Lower traveling body 103a, 103b, 103c Mechanism 104a, 104b, 104c Hydraulic cylinder 106 Bucket 108 Arm 109 Boom 110 Quarry reinforcement structure 112 Reinforcement plate 113 Screw hole 114 Square material 116 Bolt 118 Bolt accommodation hole 120 Bolt Insertion hole

Claims (3)

In a construction machine having a reinforcement structure on the lower surface of the arm,
A construction machine, wherein at least a part of the reinforcing structure is detachably coupled to a lower surface of an arm.   The construction machine according to claim 1, wherein the reinforcing structure includes a square member and a reinforcing plate, and the square member is coupled to a reinforcing plate joined to a lower surface of the arm by bolt fastening.   The construction machine according to claim 1, wherein the reinforcement structure is a quarry reinforcement structure for an arm used for quarrying work.

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