Patent Abstract:
An improved structure of a cable winch used in vehicle is disclosed. The present cable winch provides the user to turn the control button to position a protruded peg at the top edge of the through hole of the gear box, and the control button will pull the transmission shaft and the moving gear thereon and the worm-like spring, thereby the moving gear disengages from the teeth portion of the rolling cylinder and the rolling cylinder is unloaded and rotates freely, and the cable of the winch can be rapidly and conveniently pulled out.

Full Description:
BACKGROUND OF THE INVENTION  
         [0001]    (a) Technical Field of the Invention  
           [0002]    The present invention relates to a winch, and in particular, a winch which can control the disengagement of a speed-reducing device and motor from a rolling cylinder such that the rolling cylinder is rotated without load and the cable of the winch can be manually pulled out conveniently.  
           [0003]    (b) Description of the Prior Art  
           [0004]    [0004]FIGS. 1, 2 and  2 A show a conventional winch structure, wherein on one side of the rolling cylinder  11  a first gear box  12  and a rotating knob  13  and the first gear box  12  makes use of a transmission shaft  14  to mount in sequence a pushing plate  131 , a first sun gear  121 , two planetary gear sets  122 . The rolling cylinder  11  has a second gear box  15  and a motor  16 . In this conventional structure, if the cable  112  on the rolling cylinder  111  is pulled manually, the rolling cylinder  111  is engaged in sequence with the first gear set  122  and therefore the pulling of the cable is laborious and the speed of pulling is rather slow. Further, the gears may sometime in engagement when pulling of the cable which further causes time-consuming during the process of pulling.  
           [0005]    Accordingly, it is an object of the present invention provide an improved structure of a cable winch used in vehicle which mitigate the above drawbacks.  
         SUMMARY OF THE INVENTION  
         [0006]    Accordingly, it is an object of the present invention to provide an improved structure of a cable winch used in vehicle, wherein when the user turns the control button to position a protruded peg at the top edge of the through hole of the gear box, the control button will tow the transmission shaft and the moving gear thereon and the worm-like spring, thereby the moving gear disengages from the teeth portion of the rolling cylinder and the rolling cylinder is unloaded and rotates freely, and the cable of the winch can be rapidly and conveniently pulled out.  
           [0007]    One aspect of the present invention is to provide an improved structure of a cable winch used in vehicle, comprising a rolling cylinder component having one end being mounted with a gear speed-reducing device and the other end being mounted with a motor so as to transmit the power of the motor to the rolling cylinder component by the gear speed-reducing device, and the speed-reducing device including a control button, a transmission shaft, a gear box, a sun gear, a plurality of planetary gear sets, a clutch and planet gear set, and a fastening ring, characterized in that  
           [0008]    the interior of the control button is provided with a protruded tubular section and the center of the tubular section is provided with an inner hole, and the circumferential edge thereof is arranged with protruded pegs;  
           [0009]    the transmission shaft is a hexagonal rod body having one end being inserted into the inner hole of the control button using the fastening ring and a recessed ring is provided close to the middle section thereof;  
           [0010]    the bottom surface of the gear box is provided with a through hole and the inner circumferential edge of the through hole is provided with a recess to match with the protruded peg of the control button;  
           [0011]    the clutch and planet gear set includes a planet gear train  361 , a front cover, a moving gear, a worm-like spring, and a fixing board, and the center of the front cover is pressed into a protruded section surrounded with teeth hole and the board surface of the front cover is provided with an engaging hole and by means of the fixing board to mount the moving gear and the worm-like spring so that the moving gear is extendable and retractable within the protruded section of the front cover;  
           [0012]    the surface of the fixing board is provided with crooked leg to correspond with the engaging hole of the front cover so that the moving gear and the worm-shaped gear are mounted on the front cover; and the center of the rotating shaft of the motor is provided a polygonal insertion hole with external diameter substantially the same as the transmission shaft, the transmission shaft is inserted into the inner hole of the control button and is locked with the fastening ring, and the tubular section of the control button is inserted at the position of the through hole of the gear box and the protruded peg of the control button is in alignment with the recess of is the gear box and the transmission shaft is extended to the center of the gear box and in sequence the transmission shaft is mounted with the pad, the sun gear, a plurality of planetary gear set and the clutch and planet gear set, thereby in releasing the cable, the control button is pulled and turned so that the protruded peg urges the top edge of the through hole of the gear box and the button pulls the transmission shaft and the fastening ring compresses the moving gear and the worm-like spring so that the moving gear disengages with the teeth section of the rolling cylinder, and the rolling cylinder is dislocated from the clutch and planet gear set and rotates freely, and the cable is retracted rapidly and conveniently  
           [0013]    Other object and advantages of this invention will become more readily appreciate as the same becomes understood by reference to the following detailed description.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]    [0014]FIG. 1 is a perspective view of a conventional winch.  
         [0015]    [0015]FIG. 2 is a sectional exploded view of the conventional winch.  
         [0016]    [0016]FIG. 2A is a perspective view of the  
         [0017]    [0017]FIG. 3 is a sectional view of the conventional winch.  
         [0018]    [0018]FIG. 4 is a sectional view showing the disengagement of the transmission shaft from the first sun gear of a conventional winch.  
         [0019]    [0019]FIG. 5 is a perspective view of an improved structure of a cable winch used in vehicle of the preferred embodiment of the present invention.  
         [0020]    [0020]FIG. 6 is an exploded perspective view of an improved structure of a cable winch used in vehicle of the present invention.  
         [0021]    [0021]FIG. 7 is an exploded perspective view of the clutch and planet gear of the present invention.  
         [0022]    [0022]FIG. 8 is a perspective view of the motor of the present invention.  
         [0023]    [0023]FIG. 9 is a perspective partial sectional view of an improved structure of a cable winch used in vehicle of the present invention.  
         [0024]    [0024]FIG. 10 is a sectional view of an improved structure of a cable winch used in vehicle of the present invention.  
         [0025]    [0025]FIG. 11 is a sectional perspective view showing the clutch and planet gear disengaged from the gear box of an improved structure of a cable winch used in vehicle of the present invention.  
         [0026]    [0026]FIG. 12 is a sectional view showing the clutch and planet gear disengaged from the gear box of an improved structure of a cable winch used in vehicle of the present invention.  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0027]    Referring to FIGS. 5 and 6, there is shown an improved structure of a cable winch used in vehicle, comprising a rolling cylinder component  20  having one end being mounted with a speed-reducing device  30  and the other end being mounted with a motor  40  so as to transmit the power of the motor  40  to the rolling cylinder component  20  by the speed-reducing device  30 . In accordance with the present invention, the speed-reducing device  30  includes a control button  31 , a transmission shaft  32 , a gear box  33 , a sun gear  34 , a plurality of planetary gear sets  35 , a clutch and planet gear set  36 , and a fastening ring  37 , wherein the interior of the control button  31  is provided with a protruded tubular section  311  and the center of the tubular section  311  is provided with an inner hole  312 , and the circumferential edge is arranged with protruded pegs  313 ; the transmission shaft  32  is a hexagonal rod body having one end being inserted into the inner hole  312  of the control button  31  using the fastening ring  321  and a recessed ring  322  is provided close to the middle section thereof; the interior of the gear box  33  is a cavity and the inner wall is provided with inner ring teeth  331 , and the bottom surface being a through hole  332  and the inner circumferential edge of the through hole  332  is provided with a recess  333  to match with the protruded peg  313  of the control button  31 . The sun gear  34  and the planet gear set  35  are obvious and further description thereof is not needed.  
         [0028]    Referring to FIGS. 6 and 7, the clutch and planet gear set  36  includes planet gear train  361 , a front cover  362 , a moving gear  363 , a worm-like spring  364 , and a fixing board  365 , wherein the center of the front cover  362  is pressed into a protruded section  3621  surrounded with teeth hole  3622  and the board surface of the front cover  362  is provided with an engaging hole  3623 , and the inner lateral face of the front cover  362  between the planet gear train  361  is provided with the moving gear  363  and the worm-like spring  364  using a fixing board  365  and the teeth hole  3622  of the front cover  362  and the moving gear  363  match with each other, so that the moving gear  363  is extendable and retractable within the protruded section  3621 ; the surface of the fixing board  365  is provided with crooked leg  3651  to mount with the engaging hole  362  of the front cover  362  so that the moving gear  363  and the worm-shaped gear  364  are mounted on the front cover  362 .  
         [0029]    As shown in FIGS. 6 and 8, the center of the rotating shaft  41  of the motor  40  is a non-circular insertion hole  42  having an exterior diameter substantial the same as that of the transmission shaft  32 .  
         [0030]    The combination of the winch of the present invention is shown in is FIGS.  6  to  10 . One end of the transmission shaft  32  is inserted into the inner hole  312  of the control button  31  and a fastening ring  321  is used to fasten. The tubular section  311  of the control button  31  is pivotally inserted into the through hole  332  position of the gear box  33  and the protruded peg  313  is matched to the recess  333  of the gear box  33 . The transmission shaft  32  is mounted at the center of the gear box  33  and the transmission shaft  32  of the gear box  33  is then mounted in sequence with a corrugated pad  38 , sun gear  34 , a plurality of planetary gear set  35  and the clutch and planet gear set  36 . A fastening ring  37  is used to fasten the moving gear  363  at the recess  322  of the transmission shaft  32 . The sun gear  34  and the planetary gear set  35  and the clutch and planet gear  36  can accept the input power from the transmission shaft  32 , and the planetary gear set  35  and the clutch and planet gear set  36  are in engagement and driven with the inner circular teeth  331  of the gear box  33  to form planetary gear-reducing device  30 . The gear box  33  is locked at one end of the rolling cylinder  20  with screw bolt  334  and the moving gear  363  of the clutch and planet gear set  36  is in engagement with the teeth portion  23  of the rolling cylinder  22 , and the transmission shaft  32  passes through the rolling cylinder  22 . The other end of the rolling cylinder  20  is pivotally mounted to the rotating shaft  41  of the mounted with a corrugated pad and a seal  44  and a screw bolt  45  is used to lock the motor  40  to the other end of the rolling cylinder  20  and the insertion hole  42  of the rotating shaft  41  is in engagement with the end terminal of the transmission shaft  32  and obtain power output from the motor  40 .  
         [0031]    In accordance with the present invention, the operation of the winch is as follows:  
         [0032]    (1) Rolling of the cable: As shown in FIG. 10, the motor  40  is turned on and the rotating shaft  41  drives the transmission shaft  32 , the sun gear  34 , the respective planetary gear set  35  and the clutch and planet gear set  36 , the planetary type of gear speed-reducing rotation within the gear box  33  is obtained. At this instance, the moving gear  363  will drive the rolling cylinder  22  of the rolling cylinder set  20  for use in the rolling of cable  21 . (II) Releasing of the cable  21 : Referring to FIGS. 11 and 12, the control button  31  is rotated so that the protruded peg  313  urges the top edge  335  of the through hole  332  of the gear box  33 , the control button  31  will drive the transmission shaft  32  and the fastening ring  37  to compress the moving gear  363  and the worm-like spring  364 , and the moving gear  363  is disengaged from the teeth section of the rolling cylinder  22 . Thus, the rolling cylinder  22  is disengaged from the clutch and planet gear set  36  and free to rotate, i.e., the cable  21  can be lightly, conveniently pulled out for use. If the control button  31  is released, the cable  21  will be returned to its original position, as shown in FIG. 10.  
         [0033]    It will be envisioned that various substitutions and modifications of the preferred embodiment illustrated in the drawings and described above can be made without departing from the invention as defined in the claims. It will be understood that persons skilled in the art will envision various substitutions of functionally equivalent structure for the structural elements described without departing from the invention.

Technology Classification (CPC): 1