Patent Publication Number: US-2010127230-A1

Title: Puller Device

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a puller device that allows to disassemble large-size mechanical components by moving the puller device vertically and adjusting the angle of the puller device. 
     2. Description of the Prior Arts 
     Conventional puller devices are used to assemble or disassemble large-size mechanical components, e.g., bearings, gears, tubular members, and the like. Generally, the puller device is driven by a hydraulic pump to move a hook set vertically, and then a cylinder further drives the hook set to assemble or disassemble the workpiece. 
     The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
     SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide a puller device, which allows to disassemble large-size mechanical components by moving the puller device vertically and adjusting the angle of the puller device. 
     The puller device comprises a support set, an adjusting assembly for adjusting the angle of the puller device, and a pulling assembly, wherein 
     the support set is disposed on one end of a base for moving the puller device vertically and is connected with a cylinder, and a hydraulic pump mounted on one end of the cylinder is used to drive the puller device to move vertically; 
     the adjusting assembly is fixed on the action end of the support set for adjustably tilting the pulling assembly and includes a fixed member secured proximate to the lower end thereof and pivotally coupled with a movable member which is attached on the upper end of the adjusting assembly, and first and second fastening parts are extendedly arranged on the fixed and movable members respectively for inserting through a micro-adjusting post so as to adjustably move the pulling assembly vertically; 
     the pulling assembly is assembled on one end of the adjusting assembly for dissembling the large-size workpiece and includes a cylinder disposed on one end thereof for driving a hook set to expand or retract to pull the workpiece. 
     The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view illustrating the assembly of a puller device according to the present invention; 
         FIG. 2  is a side plan view illustrating the assembly of the puller device according to the present invention; 
         FIG. 3  is a side plan view illustrating a support set of the puller device of the present invention moving upward; 
         FIG. 4  is a side plan view illustrating a pulling assembly of the puller device of the present invention moving upward and obliquely; 
         FIG. 5  is a side plan view illustrating the pulling assembly of the puller device of the present invention moving downward and obliquely; 
         FIG. 6  is a perspective view illustrating a hook set of the puller device of the present invention being driven to expand outward; 
         FIG. 7  is a side plan view illustrating the hook set of the puller device of the present invention expanding to clamp and pull a workpiece; 
         FIG. 8  is anther side plan view illustrating the hook set of the puller device of the present invention expanding to clamp and pull the workpiece. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIGS. 1 and 2 , a puller device  4  in accordance with the present invention is used to disassemble large-size mechanical components, e.g., bearings, gears, tubular members and comprises a support set  1 , an adjusting assembly  2  for adjusting the angle of the puller device  4 , and a pulling assembly  3 , wherein the support set  1  is disposed on one end of a base  11  for moving the puller device  4  vertically and is connected with a cylinder  12 , and a hydraulic pump  13  mounted on one end of the cylinder  12  is used to drive the puller device  4  to move vertically (as illustrated in  FIGS. 2 and 3 ); 
     the adjusting assembly  2  is fixed on the action end of the support set  1  for adjustably tilting the pulling assembly  3  and includes a fixed member  21  secured proximate to the lower end thereof and pivotally coupled with a movable member  22  which is attached on the upper end of the adjusting assembly  2 , and first and second fastening parts  211 ,  221  are extendedly arranged on the fixed and movable members  21 ,  22  respectively for inserting through a micro-adjusting post  23  (as shown in  FIG. 1 ) so as to adjustably move the pulling assembly  3  vertically (as illustrated in  FIGS. 4 and 5 ); 
     the pulling assembly  3  is assembled on one end of the adjusting assembly  2  for dissembling the large-size workpiece and includes a cylinder  31  disposed on one end thereof for driving a hook set  32  to expand or retract to pull the workpiece (as shown in  FIGS. 1 and 6 ). 
     As illustrated in  FIG. 6 , during disassembling a large-size workpiece, the hydraulic pump  13  drives the cylinder  12  to move the support set  1  upward to a desired height, and the micro-adjusting post  23  of the adjusting assembly  2  adjustably rotates the pulling assembly  3  to a suitable angle (as illustrated in  FIGS. 4 and 5 ). Furthermore, the cylinder  31  disposed on one end of the pulling assembly  3  drives the hook set  32  to expand (as illustrated in  FIG. 7 ) to clamp and pull a workpiece  5  outward (as shown in  FIG. 8 ). After the disassembly of the workpiece  5 , the cylinder  31  drives the hook set  32  to retract (as illustrated in  FIG. 1 ), thus finishing the disassembly of the workpiece. 
     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.