Patent Publication Number: US-2015060165-A1

Title: Hybrid construction machine

Description:
FIELD OF THE INVENTION 
     The present invention relates to a hybrid construction machine. More particularly, the present invention relates to a hybrid construction machine in which a power component including a generator interposed between an engine and a hydraulic pump has a plurality of mounting points so that the power component can be stably supported. 
     BACKGROUND OF THE INVENTION 
     As shown in  FIG. 1 , a construction machine using an engine as a power source in accordance with the prior art includes a hydraulic pump  1  that supplies a hydraulic fluid to a hydraulic actuator or the like, and an engine  2  connected to the hydraulic pump  1  so as to drive the hydraulic pump  1 . 
     A power component  3  consists of the hydraulic pump  1  and the engine  2 . The power component  3  is mounted on an upper fame  4  in a four-point supporting manner due to its short axis length. 
     The power component  3  is mounted on several brackets  5  (e.g., four brackets) that are separately weldingly fixed to the upper frame  4 . For this reason, the respective brackets  5  fixed to the upper frame are flush with each other horizontally so that the power component  3  mounted on the brackets  5  is maintained in a horizontal state. However, such a conventional construction machine entails a problem in that it is difficult to weldingly fix the brackets to the upper frame  4  in a state in which the brackets are flush with each other horizontally, thereby degrading workability. 
     DETAILED DESCRIPTION OF THE INVENTION 
     Technical Problems 
     Accordingly, the present invention has been made to solve the aforementioned problem occurring in the prior art, and it is an object of the present invention to provide a hybrid construction machine in which a power component including a generator interposed between an engine and a hydraulic pump has a plurality of mounting points so that the power component can be stably supported. 
     Another object of the present invention is to provide a hybrid construction machine in which a power component including an engine, a generator, and a hydraulic pump can be mounted on fixing plates securely fixed to a top plate of an upper frame. 
     Technical Solution 
     To accomplish the above object, in accordance with an embodiment of the present invention, there is provided a hybrid construction machine having an engine and a generator that are mounted on an upper frame, including: 
     a power component including the generator connected between the engine and a hydraulic pump; and 
     a plurality of fixing plates securely fixed to the upper frame, each fixing plate having one or more mounting holes formed thereon to allow the power component to be securely fixed thereto. 
     In accordance with a preferred embodiment, the fixing plates may be securely fixed to a top plate of the upper frame. 
     Each of the fixing plates may have at least three mounting holes formed thereon so that the power component can be mounted on the fixing plates in at least six-point supporting manner. 
     Each of the fixing plates may be formed to have a length projecting to the outside of the top plate, and may have a cross section formed in a “ ” shape. 
     Advantageous Effect 
     The hybrid construction machine in accordance with an embodiment of the present invention as constructed above has the following advantages. 
     The power component including the generator interposed between the engine and the hydraulic pump has a plurality of mounting points (e.g., the power component is mounted on the fixing plates in a six-point-supporting manner) so that the power component can be stably supported. In addition, the power component is simply mounted on the fixing plates securely fixed to the top plate of the upper frame, thereby improving workability. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       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: 
         FIG. 1  is a perspective view showing a state in which a power component is mounted in a construction machine using an engine as a power source in accordance with the prior art; 
         FIG. 2  is a perspective view showing a state in which a power component is mounted in a hybrid construction machine in accordance with an embodiment of the present invention; and 
         FIG. 3  is a perspective view showing an upper frame on which an engine and the like are to be mounted in a hybrid construction machine in accordance with an embodiment of the present invention; 
     
    
    
     EXPLANATION ON REFERENCE NUMERALS OF MAIN ELEMENTS IN THE DRAWINGS  
     
         
           10 : engine 
           11 : hydraulic pump 
           12 : generator 
           13 : power component 
           14 : upper frame 
           15 : fixing plate 
           16 : top plate 
           17 : mounting hole 
       
    
     PREFERRED EMBODIMENTS OF THE INVENTION 
     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  FIGS. 2 and 3 , a hybrid construction machine having an engine  10  and a generator  12  that are mounted on an upper frame  14  in accordance with an embodiment of the present invention includes: 
     a power component  13  including the generator  12  connected between the engine  10  and a hydraulic pump  11 ; and 
     a plurality of fixing plates  15  securely fixed to the upper frame  14 , each fixing plate having mounting holes  17  formed thereon to allow the power component  13  to be securely fixed thereto. 
     Preferably, the fixing plates  15  are securely fixed to the top surface of a top plate  16  of the upper frame  14 . 
     At least three mounting holes  17  are formed on each of the fixing plates  15  so that the power component  13  can be mounted on the fixing plates  15  in at least six-point supporting manner. 
     Each of the fixing plate  15  is formed to have a length projecting to the outside of the top plate  16 , and has a cross section formed in a “ ” shape. 
     In this case, the upper frame  14  includes a center frame  20  which consists of a bottom plate  18  and a pair of opposed side plates  19  formed vertically upwardly from the bottom plate  18  and on which an work apparatus, i.e., an attachment is to be mounted, a right frame  21  which is connected to a right end of the center frame  20  and on which a cooling system or the like is to be mounted, and a left frame  20  which is connected to a left end of the center frame  20  and on which an operator&#39;s cab or the like is to be mounted. 
     Hereinafter, a use example of a hybrid construction machine in accordance with an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
     As shown in  FIGS. 2 and 3 , the plural fixing plates  15  having a cross section formed in a “ ” shape are weldingly fixed to the top plate  16  of the upper frame  14 . In this case, since the fixing plates  15  have a cross section formed in a “ ” shape, the mounting height of the component  13  on the upper frame  14  can be ensured. In addition, since the fixing plates  15  are securely fixed to the top plate  16  with them being flush with each other horizontally, the power component  13  mounted on the fixing plates  15  is maintained in a horizontal state. 
     The power component  13  has a long axis length since the generator  12  is connected between the engine  10  and the hydraulic pump  11 . For this reason, each of the fixing plates  15  is formed to have a length projecting to the outside of the top plate  16  and has at least three mounting holes  17  formed thereon so that the power component  14  having a long axis length has a plurality of mounting points so as to be stably supported. 
     Thus, the power component  13  having a long axis length is mounted on the upper frame  14  in a six-point-supporting manner by means of fastening members engaged in the mounting holes  17  (e.g., three mounting holes  17  are formed on each fixing plate  15 ) of the fixing plates  15  securely fixed to the top plate  16 . Consequently, the power component  13  having a long axis length can be stably mounted on the upper frame  14 . 
     Meanwhile, a configuration in which the hydraulic pump  11  is driven by using the engine  10  and the generator  12 , and an attachment is driven by controlling a hydraulic fluid supplied to a hydraulic actuator from the hydraulic pump  11  is known to those skilled in the art to which the present invention pertains, and thus a detailed description thereof will be omitted to avoid redundancy. 
     INDUSTRIAL APPLICABILITY 
     As described above, according to the hybrid construction machine of the present invention as constructed above, the power component including the generator interposed between the engine and the hydraulic pump has a plurality of mounting points so that the power component can be stably supported. In addition, the power component is simply mounted on the fixing plates securely fixed to the top plate of the upper frame with the fixing plates being flush with each other horizontally, thereby improving workability.