Patent Publication Number: US-7213318-B1

Title: Knocking tool

Description:
FIELD OF THE INVENTION 
   The present invention relates to hand tools, and in particular to a knocking tool for detaching and assembling an oil sealing, a bearing, a gear, and other parts in a car easily and conveniently without damage the parts. 
   BACKGROUND OF THE INVENTION 
   The power of car is mainly from the engine in that fuel and air are mixed with a predetermined ratio. A spark plug is used to ignite the fuel to combust air to expand rapidly. Thus the piston is pushed to move reciprocally so as to generate power. The power is transferred to a crank through a linkage to drive a car. Other than piston, linkage, crank shaft, the cylinder and air value are also important components for the reciprocal operated engine. The operation of the piston is induced the friction of the wall of the cylinder so that the oil seal will become worse and thus it cannot tightly seal the opening of the cylinder. As a result, oil will flow into the surface of the engine so as to damage the top surface of the plug, inner wall of the cylinder, surface area of the valve, etc., and thus the power is insufficient. Thus the oil sealing must be detached for repair. Thereby above mentioned linkage, crank shaft, bearings, and gears must be updated as they are used for a long time, otherwise the safety of driving will be affected. 
   Generally, in updating the oil sealing, the old parts must be detached for updating a new one. In the old operation, the oil sealing is engaged to a valve rod and then a force is used to enforce the oil sealing into the valve. Generally, a car has many parts which must be assembled into an engine chamber so that the residue space is very small and the operation for assembling the oil sealing is very difficult. Furthermore, the assembling of bearings, gears, etc., uses a long rod (such as an opener or a socket) to resist against a surface of a part and then a hammer is used to knock the part. Furthermore, the centers of the oil sealing, bearings, and gears have an axial rod. In knocking, it must take care not to damage the surface of the axial rod. Thus in knocking, the position of a resisting tool must be displaced to avoid the parts to be damaged. 
   SUMMARY OF THE INVENTION 
   Accordingly, the primary object of the present invention is to provide a knocking tool for detaching and assembled the oil sealing, bearings, gears, and other parts in a car easily and conveniently without damage the parts. 
   To achieve above objects, the present invention provides a knocking tool which comprises a handle having an inclined cambered groove; one end of the cambered groove being at a first end surface of the handle; the first end surface of the handle having at least one insertion hole; an outer lateral wall of the handle having at least one through hole which is communicated to the respective insertion holes; and at least one joint assembled to the first end surface of the handle; one surface of the joint being installed with at least one insertion rod which is inserted into the insertion holes; a retainer being inserted into the respective through hole so as to tightly engage the insertion rod to the insertion hole. A connecting rod is assembled to the insertion groove of the handle; one end of the connecting rod has a combining portion; the combining portion is formed with combining holes, in assembly, the combining holes are aligned with the through holes of the insertion groove and then the retainers pass through the through holes to enter into the combining holes so as to fix the connecting rod to the handle. 
   The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is an exploded perspective view of the present invention. 
       FIG. 2  shows the operation of the present invention. 
       FIG. 3  is another exploded perspective view of the present invention. 
       FIG. 4  shows another operation of the present invention. 
       FIG. 5  is a schematic view showing that the present invention can be received in a toolbox. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
   In order that those skilled in the art can further understand the present invention, a description will be described in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims. 
   Referring to  FIGS. 1 ,  2  and  3 , the structure of the present invention is illustrated. The present invention has the following elements. 
   A handle  1  has an inclined cambered groove  10 . One end of the cambered groove  10  is at a first end surface of the handle  1 . The first end surface of the handle  1  has at least two insertion holes  11 . An outer lateral wall of the handle  1  has through holes  12  which are communicated to the respective insertion holes  11 . A second end surface of the handle  1  has an insertion groove  13 . An outer wall of the handle  1  has at least one through hole  12  corresponding to the insertion groove  13 . 
   At least one disk like joint  2  is assembled to the first end surface of the handle  1 . One surface of the joint  2  is installed with two insertion rods  20  which are inserted into the insertion holes  11 . A retainer N is inserted into the respective through hole  12  so as to tightly engage the insertion rod  20  to the insertion hole  11 . In one embodiment, the joint  2  can be formed with a notch  21  with a shape corresponding to that of the cambered groove  10  and the lateral surface of the joint  2  is an inclined surface. The retainer N may be a pin which can be inserted into the through hole  12  by using an elastic unit. 
   A connecting rod  3  is assembled to the insertion groove  13  of the handle  1 . One end of the connecting rod  3  has a combining portion  30 . The combining portion  30  is formed with combining holes  300 . In assembly, the combining holes  300  are aligned with the through holes  12  of the insertion groove  13  and then the retainers N pass through the through holes  12  to enter into the combining holes  300  so as to fix the connecting rod  3  to the handle  1 . 
   In assembly and use of the present invention, referring to  FIGS. 1 and 2 , a joint  2  is assembled to the insertion groove  13  of the handle  1 . The insertion rods  20  of the joint  2  are inserted into the insertion holes  11  of the handle  1 . Then retainers N are inserted into the through holes  12  so as to fix the joint  2  to the handle  1 . In use, the joint  2  is resisted to a part to be detached, such as an oil sealing, a bearing or a gear. The operator holds the handle  1  by one hand and knocks the distal end of the handle  1  by a hammer. Thus, the joint  2  is adhered to the part and force can be uniformly applied to the part. Thus the operation can be performed rapidly and easily. 
   If the part to be detached has an axial rod so that the disk like joint  2  can not be well adhered to the part, as shown in  FIGS. 3 and 4 , a joint  2  with a notch  21  can be used. In use, the notch  21  is aligned to the cambered groove  10  of the handle  1 . The combining portion  30  of connecting rod  3  is inserted to the insertion groove  13  of the handle  1 . The combining holes  300  of the connecting rod  3  are aligned to the through holes  12  of the handle  1  and then the retainers N are inserted into the through hole  12  so that the connecting rod  3  is tightly engaged to the handle  1 . In operation, the notch  21  of the joint  2  and the cambered groove  10  of the handle  1  are arranged at one side of the axial rod. The inclined surface  22  of the joint  2  resists against the part to be detached (such as an oil sealing, a bearing or a gear). The operator holds the connecting rod  3  by one hand and knocks the distal end of the connecting rod  3  by a hammer. Since the cambered groove  10  of the handle  1  has an inclined surface, the handle  1  and the connecting rod  3  will shift outwards. The operation can be performed easily. Furthermore, the notch  21  of the joint  2  and the cambered groove  10  of the handle  1  can be conveniently displaced axially so as to change the knocking position. The forces can be uniformly applied to the part and the operation can be performed easily and quickly. 
   If it is desired to assemble a part (such as an oil sealing, a bearing or a gear), the part is sleeved around an axial rod, and then the present invention and hammer are used to knock the part to a desired position. The operation is convenient and rapid. The present invention includes a handle  1 , a plurality of joints  2  of different specifications, and at least one connecting rod  3  of different size. The present invention can be received in a toolbox  4 , as shown in  FIG. 5 . Thereby the present invention can be arranged to match the kinds of cars, parts (such as oil sealings, bearings or gears). 
   The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.