The present invention relates to a hydraulic pipe fixing device of a boom swing type excavator on which a work apparatus is mounted so as to be swiveled horizontally with respect to an upper swing structure. More particularly, the present invention relates to such a hydraulic pipe fixing device of a boom swing type excavator that includes a swing support swingably connected to a front end portion of an upper swing structure, a work apparatus (including a boom, a boom cylinder and the like) rotatably fixed on the swing support, and a hydraulic pipe supplying a hydraulic fluid to the work apparatus.
As shown in
In the hydraulic pipe fixing device of a boom swing type excavator according to the prior art as shown in
Meantime, the hydraulic pipe 8 is composed of a plurality of unit pipes to supply the hydraulic fluid to an arm cylinder and a bucket cylinder (not shown). The hydraulic pipe 8 is disposed so as to sequentially pass through a control valve (e.g., MCV not shown) mounted inside the upper swing structure 1, an internal space of the swing support 4, a though-hole (not shown) formed on the swing support 4, and a space defined between the swing support 4 and a fixing pin 10 for the boom in this order. In this case, the hydraulic pipe 8 which has passed through the space defined between the swing support 4 and the fixing pin 10 for the boom is connected to a quick coupler (not shown) fixed to the upper surface of the boom 5 in a state of being curved or inflected so as to be displaceable according to the pivotal rotation of the boom 5.
In this case, the length and a degree of flection of the above-mentioned hydraulic pipes 7 and 8 are determined in consideration of the case where the boom 5 is pivotally rotated in a forward and backward direction or in a left and right direction (i.e., a horizontal direction).
As such, the length and a degree of flection of the hydraulic pipes 7 and 8 are determined in consideration of a radius of swing of the work apparatus, and then are disposed, so that the hydraulic pipes 7 and 8 are unnecessarily extended.
In addition, the hydraulic pipes 7 and 8 extending from the control valve mounted inside the upper swing structure 1 to the upper surface of the boom cylinder 6 or the boom 5 are exposed to the outside in a state of being protruded outwardly from the outer surface of the boom cylinder 6 or the swing support 4. Thus, the conventional hydraulic pipe fixing device entails a problem in that when the work apparatus is pivotally rotated relative to the upper swing structure, the hydraulic pipes 7 and 8 are abraded due to an interference with other parts positioned at a connection portion of the upper swing structure 1 and the swing support 4, and a connection portion of the swing support 4 and the boom 5, thereby shortening the lifespan of the hydraulic pipes.
Therefore is a need for a separate cover for solving the above-mentioned abrasion-related problem and protecting the hydraulic pipes 7 and 8 from being exposed to the outside
Accordingly, the present invention was made to solve the aforementioned problem occurring in the prior art, and it is an object of the present invention to provide a hydraulic pipe fixing device of a boom swing type excavator, in which when the work apparatus is pivotally rotated or shaken (or jerked) relative to the upper swing structure, the displacement and movement of the hydraulic pipe is minimized, thereby preventing abrasion of the hydraulic pipe due to an interference with other parts.
Another object of the present invention is to provide hydraulic pipe fixing device of a boom swing type excavator in which the hydraulic pipe is not protruded outwardly from an outer surface of the boom cylinder or the swing support, thereby eliminating a necessity for a separate cover for protecting the hydraulic pipe.
To accomplish the above object, in accordance with a first embodiment of the present invention, there is provided a hydraulic pipe fixing device of a boom swing type excavator, which includes a swing support swingably connected to a front end portion of an upper swing structure, and a work apparatus rotatably fixed on the swing support, the hydraulic pipe fixing device including:
In accordance with a second embodiment of the present invention, there is provided a hydraulic pipe fixing device of a boom swing type excavator, which includes a swing support swingably connected to a front end portion of an upper swing structure, and a work apparatus rotatably fixed on the swing support, the hydraulic pipe fixing device comprising:
The hydraulic pipe fixing device of a boom swing type excavator according to the embodiments of the present invention as constructed above has the following advantages.
The length of the hydraulic pipe extending from the control value (called “MCV”) inside the upper swing structure to the work apparatus (including a boom cylinder or the like) is minimized, when the work apparatus including the boom and the like is pivotally rotated in a horizontal direction or shaken (or jerked) in a vertical direction relative to the upper swing structure, the displacement and movement of the hydraulic pipe is minimized, thereby preventing abrasion of the hydraulic pipe due to an interference with other parts, and thus prolonging the lifespan of the hydraulic pipe.
In addition, the hydraulic pipe is not protruded outwardly from an outer surface of the boom cylinder or the swing support, thereby eliminating a necessity for a separate cover for protecting the hydraulic pipe, and thus reducing the manufacturing cost.
The above objects, other features and advantages of the present invention will become more apparent by describing the preferred embodiments thereof with reference to the accompanying drawings, in which:
Now, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The matters defined in the description, such as the detailed construction and elements, are nothing but specific details provided to assist those of ordinary skill in the art in a comprehensive understanding of the invention, and the present invention is not limited to the embodiments disclosed hereinafter.
As shown in
The hydraulic pipe fixing device includes:
Hereinafter, a use example of the hydraulic pipe fixing device of a boom swing type excavator in accordance with a first embodiment of the present invention will be described in detail with reference to the companying drawings.
As shown in
As a result, when the work apparatus 17 including the boom 19 is pivotally rotated relative to the upper swing structure 11 by the driving of a swing cylinder, the hydraulic pipe 13 can be arranged neatly by virtue of the second hydraulic pipe support hole 18, and a horizontal movement of the hydraulic pipe 13 can be limited and a vertical displacement of the hydraulic pipe 13 can be guided.
Thus, when the boom 19 is pivotally rotated relative to the upper swing structure 11, the vertical displacement or shaking of the hydraulic pipe 13 can be minimized, thereby preventing abrasion of the hydraulic pipe 13 due to an interference with other parts. In addition, the hydraulic pipe 13 is not protruded outwardly from an outer surface of the boom cylinder 20 or the swing support 15, thereby eliminating a necessity for a separate cover for protecting the hydraulic pipe 13.
As shown in
The hydraulic pipe fixing device includes:
Hereinafter, a use example of the hydraulic pipe fixing device of a boom swing type excavator in accordance with a second embodiment of the present invention will be described in detail with reference to the companying drawings.
As shown in
As a result, when the work apparatus 17 including the boom 19 is shaken or jerked vertically relative to the upper swing structure 11 by the driving of the boom cylinder, the first hydraulic pipe 13a positioned between the hydraulic pipe coupler 21 and the work apparatus 17 is moved vertically according to the vertical shaking or jerking movement of the work apparatus 17. In this case, the amount of flection (deformation) of the first hydraulic pipe 13a can be minimized by minimizing the length of the hydraulic pipe from the hydraulic pipe coupler 21 to the work apparatus 17.
In the meantime, when the work apparatus 17 including the boom 19 is pivotally rotated horizontally relative to the upper swing structure 11 by the driving of the boom cylinder, the first hydraulic pipe 13b positioned between the control valve mounted inside the upper swing structure 11 and the hydraulic pipe coupler 21 is moved horizontally according to the horizontal pivotal rotation movement of the work apparatus 17.
That is, when the boom 19 is swiveled, the first hydraulic pipe 13a is positioned on a center line of the boom 19 or is moved together with the swing support 15. As a result, the vertical displacement or shaking of the hydraulic pipe 13b can be minimized, thereby preventing abrasion of the hydraulic pipe 13b due to an interference with other parts. In addition, the hydraulic pipe 13b is not protruded outwardly from an outer surface of the swing support 15, thereby eliminating a necessity for a separate cover for protecting the hydraulic pipe 13b.
According to the hydraulic pipe fixing device of a boom swing type excavator in accordance with the present invention, the length of the hydraulic pipe from the control valve (MCV) mounted inside the upper swing structure to the work apparatus (meaning the boom cylinder or the like) is optimized, so that when the work apparatus including the boom and the like is pivotally rotated in a horizontal direction or shaken (or jerked) in a vertical direction relative to the upper swing structure, the displacement and movement of the hydraulic pipe is minimized, thereby preventing abrasion of the hydraulic pipe due to an interference with other parts. Further, the hydraulic pipe is not protruded outwardly from an outer surface of the boom cylinder or the swing support, thereby eliminating a necessity for a separate cover for protecting the hydraulic pipe.
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/KR2010/009022 | 12/16/2010 | WO | 00 | 6/11/2013 |