Abstract:
A tool ( 1 ) for installation or removal of a retaining pin ( 2 ) to or from aligned bores ( 3, 4 ) in first and second components, said tool ( 1 ) including: a drive rod ( 7 ), adapted to be positioned adjacent a first end ( 8 ) of said aligned bores ( 3, 4 ); and, an actuator ( 9 ), operable to move said drive rod ( 7 ), to thereby push said retaining pin ( 2 ) into or from said aligned bores ( 3, 4 ).

Description:
BACKGROUND OF THE INVENTION 
       [0001]    The present invention relates to a tool for installation and/or removal of a retaining pin to or from aligned bores in components. In particular, the present invention relates to a tool for use to install or remove a retaining pin, which is typically used for attachment of a wear tooth to a tooth adaptor of a mining, earthmoving or like vehicle or machine. The present invention also relates to a method of installing or removing such a retaining pin. 
       DESCRIPTION OF THE PRIOR ART 
       [0002]    The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as, an acknowledgement or admission or any form of suggestion that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates. 
         [0003]    Wear teeth are typically attached to mining or earthmoving equipment such that they can be readily removed and replaced as they wear out. It is well known to attach a wear tooth to a tooth adaptor by means of a retaining pin being positioned in aligned bores of the wear tooth and tooth adaptor. 
         [0004]    Whilst the use of such a retaining pin has significant time and cost advantages over previous methods of attaching a wear tooth to a tooth adaptor by welding or other forms of securement, such a retaining pin is typically removed using an extractor pin which is then forcibly struck with a sledge hammer or the like. This operation requires considerable physical effort and is also prone to user injury. 
       SUMMARY OF THE INVENTION 
       [0005]    The present invention seeks to overcome at least some of the disadvantages of the prior art, by providing a tool for installation or removal of a retaining pin which requires less physical effort or exertion by a user, and is typically safer, in use. 
         [0006]    The present invention also seeks to provide a tool and a method for installing or removing a retaining pin to or from aligned bores in first and second components in which the process is effectively performed without substantive physical effort of a user, but rather, by utilising an actuator such as, but not limited to, a hydraulic cylinder, a pneumatic cylinder or an electric motor. 
         [0007]    In one broad form, the present invention provides a tool for installation or removal of a retaining pin to or from aligned bores in first and second components, said tool including: 
         [0008]    a drive rod, adapted to be positioned adjacent a first end of said aligned bores; and, 
         [0009]    an actuator, operable to move said drive rod, to thereby push said retaining pin into or from said aligned bores. 
         [0010]    Preferably, the tool further includes a securement mechanism, adapted to releasably secure said tool to at least one of said first and second components. 
         [0011]    Also preferably, the actuator includes at least one of a hydraulic cylinder; a pneumatic cylinder; and, an electric motor. 
         [0012]    Preferably, said securement mechanism includes a frame, adapted to substantially surround said first and second components. 
         [0013]    Also preferably, said frame includes: 
         [0014]    a pair of heads, each head adapted to substantially align with said bores of said components; and 
         [0015]    a pair of adjustable brace members, for positional adjustment of said heads relative to each other. 
         [0016]    Preferably, the tool further includes a pair of adjustable arms extending outwardly from each of said heads, for positional adjustment of said brace members relative to each other. 
         [0017]    Preferably, each head includes a pivoting neck portion, for angular adjustment thereof. 
         [0018]    Also preferably, said drive rod and said actuator are substantially housed in a first of said heads. 
         [0019]    Preferably, the tool further includes a pin receptacle is housed within a second of said heads. 
         [0020]    Preferably, said first and second components include a wear tooth and tooth adaptor of a mining, earthmoving or like vehicle or machine. 
         [0021]    In a further broad form, the present invention provides a method of installing or removing a retaining pin to or from aligned bores of first and second components, including the steps of: 
         [0022]    operating said tool, such that an actuator moves a drive rod to thereby push said retaining pin into or from said aligned bores. 
         [0023]    Preferably, the method includes the preliminary step of securing said tool to at least one of said components. 
         [0024]    Preferably, said actuator includes at least one of: 
         [0025]    a hydraulic cylinder; 
         [0026]    a pneumatic cylinder; and, 
         [0027]    an electric motor. 
         [0028]    Preferably, said first and second components include a wear tooth and tooth adaptor of a mining, earthmoving or like vehicle or machine. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0029]    The present invention will become more fully understood from the following detailed description of preferred but non-limiting embodiments of the present invention, described in connection with the accompanying drawings, in which: 
           [0030]      FIG. 1  illustrates a perspective view of a tool in accordance with the present invention, shown attached to the first and second components; 
           [0031]      FIG. 2  illustrates a partly cut away view of the tool and components shown in  FIG. 1 ; 
           [0032]      FIG. 3  illustrates an end view of the tool shown in  FIG. 1 ; 
           [0033]      FIG. 4  illustrates a sectional view through Section A-A shown in  FIG. 3 ; and, 
           [0034]      FIG. 5  illustrates a sectional view through Section C-C shown in  FIG. 3 . 
       
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
       [0035]    Throughout the drawings, like numerals will be used to identify similar features, except where expressly otherwise indicated. 
         [0036]    As shown in the drawings, the tool, generally designated by the numeral  1 , is typically used for installing or removing a retaining pin  2  (as shown in  FIGS. 2, 4 and 5 ) to or from aligned bores  3  and  4  provided in a wear tooth  5  and tooth adaptor  6 , respectively. The tool  1  includes a drive rod  7 , which is adapted to be positioned adjacent a first end  8  of the aligned bores  3  and  4 , and, an actuator  9 , operable to move the drive rod  7 , to thereby push the retaining pin  2  into or from the aligned bores  3  and  4 . 
         [0037]    The tool  1  further includes a securement mechanism, embodied in the form of a frame  10 , which is adapted to releasably secure or attach the tool  1  to at least one of the first and second components  5  and  6 . The securement mechanism or frame  10  will be described in further detail hereinafter. 
         [0038]    The tool  1  has advantages over the prior art in that it includes an automated actuator  9 . The actuator preferably includes any one or more of a hydraulic cylinder, a pneumatic cylinder, an electric motor, or some other similar electromechanical or other actuator. 
         [0039]    The securement mechanism  10 , as previously mentioned, includes a frame, which is adapted to substantially surround the first and second components  5  and  6 . The frame includes a pair of heads  11  and  12  each adapted to be substantially aligned with the bores  3  and  4  of the components  5  and  6 . The frame further includes a pair of adjustable brace members  13  and  14  which include adjustment mechanisms  15  and  16  for positional adjustment of the heads  11  and  12  relative to each other. The adjustment mechanisms  15  and  16  may be embodied in the form of threaded rods  17  and  18  and cooperating nuts  19 ,  20 ,  21  and  22  which may be adjusted along rods  17  and  18  and then tightened to thereby effectively secure the heads  11  and  12  relative to each other. 
         [0040]    One of the threaded rods may incorporate a handle  23 , for user convenience in carrying and/or positioning the tool. The tool  1  may further include a pair of adjustable arms  25  and  26  extending outwardly from the first of the head  11 , and a further pair of adjustable arms  27  and  28  extending from the second head  12 . These adjustable arms allow for positional adjustment of the brace members  13  and  14  relative to each other and, as shown, may be embodied in the form of a slide channel which is adapted to cooperatively engage the nuts  21  and  22 . Other forms of adjustment mechanisms to permit adjustment of the brace members  13  and  14 , and, the adjustable arms  25 ,  26 ,  27  and  28  will become apparent and should be considered to be incorporated within the scope of the invention. 
         [0041]    Each head  11  and  12  may further include a pivoting neck portion  30  and  31 , for angular adjustment of the heads  11  and  12  such that the tool  1  may be securely engaged with at least one of the components  5 , particularly when the contact surfaces of the component  5  are not perpendicular to the heads  11  and  12 , but rather, are provided at a transverse angular disposition relative thereto. Various alternative forms of pivotal mechanisms will become apparent and should also be considered to be within the scope of the invention. 
         [0042]    As shown in the drawings, the drive rod  7  and actuator  9  are provided in a housing  32  in a first of the heads  11 , and a pin receptacle  33  is housed within a second of the heads  12 . 
         [0043]    As will be understood, the device of the present invention is particularly useful for installing and/or removing a retaining pin either onto or from a wear tooth and tooth adaptor of mining, earthmoving or like vehicle or machine. 
         [0044]    In use, the device may typically be operated such that the actuator  9  moves the drive rod  7  to thereby push the retaining pin  2  into or from the aligned bores. The device may of course be utilised to just perform one of these operations of either installing or removing the retaining pin, or both. 
         [0045]    As will be understood, in use, the tool is preferably initially secured to one of the components. In this case, as shown in the drawings, the tool  1  is installed and secured to the wear tooth  5  by firstly positioning the tool about the wear tooth, adjusting the adjustable brace members  13  and  14  as necessary, and adjusting the adjustable arms  25 ,  26 ,  27  and  28  as necessary, and then securing the various nuts and rods, such that the tool is preferably tightly abutted against the wear tooth with the pivoting neck portions angled appropriately from the heads such that the tool is firmly secured. 
         [0046]    Once in position, the actuator  9  is operated and either draws the retaining pin into the aligned bores from the pin receptacle  33 , or, if the pin  2  is required to be removed, the actuator is operated such that the drive rod is moved in the direction shown by arrow  34  such that the drive rod  7  abuts against the end of the retaining pin  2  to push the pin from the “installed” position shown in the drawings, to the “removed” position wherein the pin is pushed into the pin receptacle  33 . 
         [0047]    Whilst a particular embodiment of the tool has been shown in the drawings, it will be appreciated that numerous variations and modifications can be made. All such variations and modifications should be considered to be within the scope of the invention as broadly hereinbefore described and as hereinafter claimed.