Abstract:
A nut disassembling device is provided, comprising an adjustment member, a support rod, a center pillar and two clamping blocks. The support rod is screwed with two tightening members. Each of the tightening members is rotatable relative to the support rod, and the clamping block is moved by the tightening member. Thus, during the clamping of the nut, the clamping blocks close and push the nut through rotation of the tightening members, and it effectively improves the clamping for installation and uninstallation of the nut.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a nut disassembling device, and more particularly to a disassembling structure for nuts on vehicle tires. 
     2. Description of the Prior Art 
     In prior arts, a reaction force occurs when a nut disassembling structure abuts against a nut, and it makes the clamping performance bad. So that the nut wears down while applying forces on it in a disassembling process, and this disadvantage is needed to be improved. 
     The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide a nut disassembling device to improve the performance of clamping a nut. 
     To achieve the above object, a nut disassembling device in accordance with present invention comprises an adjustment member, a support rod, a center pillar and two clamping blocks. 
     The support rod includes a third threaded portion and two tightening members screwed to the third threaded portion. The center pillar includes a first through hole and a second through hole, the first through hole is for penetration of the adjustment member, and the second through hole is for penetration of the third threaded portion of the support rod. Each clamping block includes a clamping portion, a third through hole and a fourth through hole, and the fourth through hole locates between the clamping portion and the third through hole. The adjustment member inserts in the third through hole or the fourth through hole and is able to drive the clamping block to move. The other of the third and fourth through holes which unpenetrates through the adjustment member is movably disposing around the third threaded portion of the support rod. The tightening members are disposed on the support rod, and when each of the tightening members rotates relative to the support rod, the clamping block is moved by the tightening member. 
     When clamping a nut and disassembling it, the tightening member is rotatable to drive the clamping portion to farther abut against the nut tightly. It improves the performance of clamping the nut, so that it is convenient for disassembling the nut. It also improves the abrasion of a part and elongates a usage life of a structure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a three-dimensional drawing showing a preferable embodiment of the present invention; 
         FIG. 2  is a breakdown drawing showing a preferable embodiment of the present invention; 
         FIG. 3  is a cross-sectional drawing showing a preferable embodiment of the present invention; 
         FIG. 4  is a perspective drawing showing a preferable embodiment of the present invention in use. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention. 
     Referring to  FIGS. 1-3 , a nut disassembling device includes an adjustment member  1 , a support rod  2 , a center pillar  3  and two clamping blocks  4 . 
     The adjustment member  1  includes a first threaded portion  11 , a second threaded portion  12  and a middle portion  13 . The thread direction of the first threaded portion  11  is opposite to that of the second threaded portion  12 . The middle portion  13  locates between the first threaded portion  11  and the second threaded portion  12 . The middle portion  13  is formed with a circular slot  14 . Besides, the adjustment member  1  is formed with a driving part  15  at one end, and the driving part  15  includes a polygonal outer circumferential surface. The driving part  15  is for connecting with a tool (such as a wrench) and drives the adjustment member  1  to rotate by using the tool. 
     The support rod  2  includes a third threaded portion  23  and two tightening members  25  screwed to the third threaded portion  23 . In the present embodiment, the tightening member  25  is such as a nut. And the support rod  2  is formed with a positioning hole  26  in the middle. 
     The center pillar  3  includes a first through hole  31 , a second through hole  32  and a concave hole  33 . The first through hole  31  is movably inserted with the adjustment member  1  and able to move to the middle portion  13 . The first through hole  31  is movable along the adjustment member  1 . The second through hole  32  is movably inserted with the third threaded portion  23  of the support rod  2 . The second through hole  32  is movable along the support rod  2 . The concave hole  33  locates on one end of the center pillar  3 . In the present embodiment, the concave hole  33  is a polygonal hole and for connecting with a tool. When the center pillar  3  is disposed on the middle portion  13  of the adjustment member  1 , the first fixing pin  35  inserts in the first through hole  31  and the circular slot  14 . So that the center pillar  3  remains on the middle portion  13  and they are rotatable relative to each other. The second fixing pin  36  inserts in the second through hole  32  and the positioning hole  26 , so that the center pillar  3  and the support rod  2  are fixed relative to each other. 
     Each of the two clamping blocks  4  includes a clamping portion  41 , a third through hole  43  and a fourth through hole  45 . The clamping portion  41  and the third through hole  43  are respectively disposed on the two ends of the clamping block  4 . The fourth through hole  45  locates between the clamping portion  41  and the third through hole  43 . Each of the fourth through holes  45  includes inner thread and is for screwing with the first threaded portion  11  and the second threaded portion  12 . So that the adjustment member  1  inserts in the fourth through hole  45  and drives the clamping block  4  to move. Specifically, when the adjustment member  1  rotates in a forward direction or in a reverse direction, it changes the distance between the two clamping blocks  4 . Each of the third through holes  43  is for movable penetration of the third threaded portion  23  of the support rod  2  (wherein the adjustment member inserts in the third or fourth through hole and drives the clamping block to move, the other of the third and fourth through holes which unpenetrates through the adjustment member is movably disposing around the third threaded portion of the support rod, and the adjustment member is unlimited to only insert in the fourth through hole). Each of the two clamping blocks  4  is formed with a resisting surface  431  close to the third through hole  43  for contacting with the tightening member  25 . In the present embodiment, the resisting surface  431  is a bordering surrounding the third through hole  43  and towards the center pillar  3 . The clamping portion  41  of the clamping block  4  is &lt;-shaped and includes two surfaces  411  inclining to each other. Each of the surfaces  411  is formed with a plurality of grooves. The surface  411  is unplanar and formed as concave-convex-shaped to increase the stability of clamping. And the clamping portion  41  further includes a detachable stud  412 , so that the stud  412  is able to insert in the concave hole of a disassembling part. 
     When clamping a nut  5  and disassembling it (refer to  FIG. 2  and  FIG. 4 ), the tightening member  25  is screwed to the support rod  2  and locates between the center pillar  3  and the clamping block  4  first, and then the adjustment member  1  is rotated to drive the two clamping blocks  4  to come close to or far away from each other. Specifically, the support rod  2  is provided with the tightening member  25 , and each of the tightening members  25  rotates relative to the support rod  2  to push the clamping block  4  outwardly and adjust the distance between the two clamping block  4 . So that the clamping portions  41  of the clamping blocks  4  are able to clamp the nut  5  tightly. After the clamping portions  41  clamp the nut  5 , the tightening members  25  are relatively drived to move toward the ends of the support rod  2  to increase the clamping performance of the clamping portion  41 . Specifically, when each of the tightening members  25  rotates relative to the support rod  2 , the tightening member  25  pushes the resisting surface  431  and drives the clamping block  4  to move relative to the support rod  2 . The tightening member  25  is used to align the clamping block  4  and drives the clamping portion  41  to farther abut against the nut  5  and clamp it tightly (shown in  FIG. 4 ). As a result, the stability of clamping is increased, and the disadvantage that the nut  5  is unable to be clamped tightly due to clearance is also improved. 
     Hence, when clamping the nut, the tightening member  25  is rotatable to drive the clamping portion  41  to farther abut against the nut tightly. It increases the performance of clamping the nut  5 , so that it is convenient for disassembling and also improves the abrasion of the mechanism and elongates the usage life of the structure. 
     The design of the tightening member  25  increases the support performance and the strength of the whole structure, so that the transmission of force is more direct during the disassembling process by rotating the center pillar  3 , and the disadvantage of poor stability due to clearance is diminished. 
     It is noted that, in the present embodiment, the center pillar  3  is formed with a            -shaped concave  38  respectively on both sides close to the second through hole  32 . The shape of the concave  38  is corresponding to that of the tightening member  25 , and the concave  38  is for receiving the tightening member  25 , so that the tightening member  25  is stored in the concave  38  and abuts against the surface of the concave  38  after using it.
     While we have shown and described various embodiments in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.