Abstract:
A wrench structure includes a wrench body, a rotation member, a driving mechanism, and a power supply device. Thus, the wrench structure can be both operated electrically and manually. In addition, the rotation member is wholly hidden in the drive head of the wrench body without detachment, thereby facilitating operation of the drive head of the wrench body. Further, the bevel gear of the driving rod and the bevel gear of the rotation member have a larger contact area, so that the wrench structure has a larger driving torsion.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention relates to a wrench structure, and more particularly to a wrench structure having a driving mechanism that can be both operated electrically and manually.  
           [0003]    2. Description of the Related Art  
           [0004]    A conventional wrench can be used to operate and rotate a screw member, such as the bolt, nut or the like. However, the conventional wrench can only be operated manually, thereby consuming time of operation, and thereby wasting the user&#39;s manual work.  
         SUMMARY OF THE INVENTION  
         [0005]    The primary objective of the present invention is to provide a wrench structure that can be both operated electrically and manually.  
           [0006]    Another objective of the present invention is to provide a wrench structure, wherein the rotation member is wholly hidden in the drive head of the wrench body without detachment, thereby facilitating operation of the drive head of the wrench body.  
           [0007]    A further objective of the present invention is to provide a wrench structure, wherein the bevel gear of the driving rod and the bevel gear of the rotation member have a larger contact area, so that the wrench structure has a larger driving torsion.  
           [0008]    A further objective of the present invention is to provide a wrench structure, wherein by provision of the bearing, the driving rod can be rotated in the handle of the wrench body smoothly and conveniently.  
           [0009]    A further objective of the present invention is to provide a wrench structure, wherein the switch is mounted on the handle of the wrench body, thereby facilitating the user operating the switch to change operation direction of the wrench structure.  
           [0010]    In accordance with the present invention, there is provided a wrench structure, comprising a wrench body, a rotation member, and a driving mechanism, wherein:  
           [0011]    the wrench body has a first end formed with a drive head and a second end formed with a handle, the drive head of the wrench body is formed with a receiving chamber;  
           [0012]    the rotation member is rotatably mounted on the drive head of the wrench body and includes a bevel gear rotatably mounted in the receiving chamber of the drive head of the wrench body;  
           [0013]    the driving mechanism is mounted in the handle of the wrench body and includes a stator device, a driving rod, and a rotor device;  
           [0014]    the stator device of the driving mechanism is secured in the handle of the wrench body;  
           [0015]    the driving rod of the driving mechanism is rotatably mounted in the handle of the wrench body and has a first end provided with a bevel gear meshing with the bevel gear of the rotation member; and  
           [0016]    the rotor device of the driving mechanism is rotatably mounted in the stator device and is secured on a second end of the driving rod for rotating the driving rod.  
           [0017]    Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0018]    [0018]FIG. 1 is an exploded perspective view of a wrench structure in accordance with the preferred embodiment of the present invention;  
         [0019]    [0019]FIG. 2 is a perspective assembly view of the wrench structure in accordance with the preferred embodiment of the present invention;  
         [0020]    [0020]FIG. 3 is a side plan cross-sectional view of the wrench structure as shown in FIG. 2;  
         [0021]    [0021]FIG. 4 is a schematic operational view of the wrench structure as shown in FIG. 3 in use;  
         [0022]    [0022]FIG. 5 is a schematic operational view of the wrench structure as shown in FIG. 3 in use;  
         [0023]    [0023]FIG. 6 is a partially cut-away top plan cross-sectional assembly view of the wrench structure in accordance with another embodiment of the present invention; and  
         [0024]    [0024]FIG. 7 is a side plan cross-sectional view of the wrench structure in accordance with another embodiment of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0025]    Referring to the drawings and initially to FIGS. 1-3, a wrench structure  1  in accordance with the preferred embodiment of the present invention comprises a wrench body  10 , a rotation member  14 , a driving mechanism  20 , and a power supply device  30 .  
         [0026]    The wrench body  10  has a first end formed with a drive head  11  and a second end formed with a handle  12 . The drive head  11  of the wrench body  10  is formed with a receiving chamber  13 .  
         [0027]    The rotation member  14  is rotatably mounted on the drive head  11  of the wrench body  10 . The rotation member  14  includes a bevel gear  15  rotatably mounted in the receiving chamber  13  of the drive head  11  of the wrench body  10 , and a protruding stud  16  having a first end secured on and rotated by the bevel gear  15  and a second end protruding outward from the receiving chamber  13  of the drive head  111  of the wrench body  10 .  
         [0028]    The driving mechanism  20  is mounted in the handle  12  of the wrench body  10 . The driving mechanism  20  includes a stator device  21 , a driving rod  25 , a rotor device  24 , and a conductive member  29 .  
         [0029]    The stator device  21  of the driving mechanism  20  includes a housing  23  secured in the handle  12  of the wrench body  10 , and a permanent magnet  22  mounted in the housing  23 .  
         [0030]    The driving rod  25  of the driving mechanism  20  is rotatably mounted in the handle  12  of the wrench body  10  and has a first end provided with a bevel gear  26  meshing with the bevel gear  15  of the rotation member  14 .  
         [0031]    The driving mechanism  20  further includes a bearing  261  mounted in the handle  12  of the wrench body  10  and mounted on the driving rod  25 , so that the driving rod  25  can be rotated in the handle  12  of the wrench body  10  smoothly and conveniently.  
         [0032]    The rotor device  24  of the driving mechanism  20  is rotatably mounted in the housing  23  of the stator device  21  and is secured on a second end of the driving rod  25  for rotating the driving rod  25 . The rotor device  24  of the driving mechanism  20  is provided with a coil  27  wound around the driving rod  25  and aligned with the permanent magnet  22  of the stator device  21 . The rotor device  24  of the driving mechanism  20  has an end provided with a commutator  28 .  
         [0033]    The conductive member  29  of the driving mechanism  20  is mounted in the housing  23  and has a first side provided with an electric brush  31  rested on the commutator  28  of the rotor device  24 .  
         [0034]    The power supply device  30  is mounted in the handle  12  of the wrench body  10  and is rested on a second side of the conductive member  29 . The wrench structure  1  further comprises a switch  32  mounted on the handle  12  of the wrench body  10  and connected to the power supply device  30  to control operation of the power supply device  30 .  
         [0035]    As shown in FIG. 4, the protruding stud  16  of the rotation member  14  is inserted into a socket  42  which is mounted on a screw member  40 . Then, the switch  32  is pushed toward one side to turn on the power supply device  30  which supplies an electric current which flows through the electric brush  31  of the conductive member  29  and the commutator  28  of the rotor device  24  to conduct the coil  27  of the rotor device  24 . After the coil  27  of the rotor device  24  is conducted and excited, the coil  27  of the rotor device  24  produces a magnetic field which produces a repulsion force relative to the permanent magnet  22  of the stator device  21  to drive and rotate the rotor device  24  to drive and rotate the driving rod  25  which rotates the bevel gear  26  which rotates the bevel gear  15  which rotates the protruding stud  16  which rotates the socket  42  which rotates the screw member  40 , so as to screw the screw member  40  into an article  44 .  
         [0036]    As shown in FIG. 5, the switch  32  is pushed toward the other side to control the commutator  28  of the rotor device  24  to change the direction of the electric current, so that the driving rod  25  can be rotated in the reverse direction to rotate the bevel gear  26  which rotates the bevel gear  15  which rotates the protruding stud  16  which rotates the socket  42  which rotates the screw member  40  in the reverse direction, so as to unscrew the screw member  40  from the article  44 .  
         [0037]    Referring to FIGS. 6 and 7, The wrench structure  1  further comprises a manual adjusting mechanism  50  mounted in a rear portion of the receiving chamber  13  of the drive head  11  of the wrench body  10 . Preferably, the rear portion of the receiving chamber  13  of the drive head  111  of the wrench body  10  is formed with a receiving space  131  for receiving the manual adjusting mechanism  50 . In addition, the bevel gear  15  of the rotation member  14  has a side provided with a toothed portion  151 .  
         [0038]    The manual adjusting mechanism  50  includes two pawl members  52  each pivotally mounted in the receiving space  131  of the drive head  111  of the wrench body  10  and each having a distal end meshing with the toothed portion  151  of the bevel gear  15  of the rotation member  14 . The manual adjusting mechanism  50  further includes a control lever  51  pivotally mounted on the drive head  11  of the wrench body  10  and connected to each of the two pawl members  52  to control movement of each of the two pawl members  52 . The manual adjusting mechanism  50  further includes two elastic members  53  each mounted between a wall of the receiving space  131  of the drive head  11  of the wrench body  10  and a respective one of the two pawl members  52 .  
         [0039]    In such a manner, when the power supply device  30  is inoperative, the control lever  51  can be pivoted to move one of the two pawl members  52  to lock the toothed portion  151  of the bevel gear  15  of the rotation member  14 , so as to fix the rotation member  14  in the drive head  11  of the wrench body  10 , so that the protruding stud  16  can be rotated by rotation of the drive head  111  of the wrench body  10  to rotate the socket  42  which rotates the screw member  40  so as to screw and unscrew the screw member  40  in a manual manner.  
         [0040]    Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.