Patent Publication Number: US-9415490-B2

Title: Mounting structure for a hand tool

Description:
BACKGROUND OF THE INVENTION 
     1. Fields of the Invention 
     The present invention relates to a mounting structure, and more particularly, to a mounting structure of a hand tool so as to rotate an object. 
     2. Descriptions of Related Art 
     The conventional mounting structures are disclosed in  FIGS. 19 to 22 . The cylindrical body  20  has a mounting portion  21  formed in the first end thereof and the mounting portion  21  includes twelve recesses defined in the inner periphery of the first end of the body  20 . Another mounting portion is formed in the second end of the body  20  and includes four recesses  22 . The mounting portion  21  is used to mount an object so as to rotate the object. The mounting portion  21  has an annular inclined face  23  defined in one end thereof. An angle  24  is formed between the inclined face  23  and the end face of the body  10 . Generally, the angle  24  is located within the range between 30 to 60 degrees. As shown in  FIG. 22 , when the mounting portion  21  is mounted to an object and the body  20  is rotated, the maximum stress between the mounting portion  21  and the object is applied to the end of the mounting portion  21 , the stress is delivered along the direction as shown by the arrow heads. The direction is almost parallel to the inclined face  23 . In other words, the inclined face  23  bears most of the stress that applies to the mounting portion  21 . However, the area of the inclined face  23  is not big enough so that the inclined face  23  cannot bear a large torque. 
     The present invention intends to provide a mounting structure of a hand tool to improve the shortcomings mentioned above. 
     SUMMARY OF THE INVENTION 
     The present invention relates to a mounting structure of a hand tool and includes a cylindrical body which has a mounting portion formed on the first end thereof. Multiple protrusions and recesses are formed in the inner periphery of the mounting portion. Each protrusion is connected to each of the adjacent recesses by a first conjunction line. A first face is defined annularly in the mounting portion. A second face is defined in one end of each protrusion. The first face intersects the second faces. The first face intersects the second faces at an angle. The first face is located closer to the first end of the body than the second faces. A first angle is defined between the first face and the first end of the body. The first angle is equal or less than 90 degrees. A second angle is defined between the second face and the first end of the body. The second angle is less than 90 degrees. The first angle is different from the second angle. The first face is located closer to the open end of the body than the second faces. The first and second face each are an inclined face relative to the open end of the body. The first angle is different from the second angle. A support portion is integrally formed on the end face of the open end of the body. The support portion extends from an edge of the first face so as to bear a larger torque. 
     The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view to show the mounting structure of the present invention; 
         FIG. 2  shows the front view of the mounting structure of the present invention; 
         FIG. 3  is a cross sectional view, taken along line  3 - 3  of  FIG. 2 ; 
         FIG. 4  is an enlarged view to show the circle C of  FIG. 3 ; 
         FIG. 5  is a perspective view to show the second embodiment of the mounting structure of the present invention; 
         FIG. 6  is a perspective view to show the third embodiment of the mounting structure of the present invention; 
         FIG. 7  is a perspective view to show the fourth embodiment of the mounting structure of the present invention; 
         FIG. 8  is a perspective view to show the fifth embodiment of the mounting structure of the present invention; 
         FIG. 9  is a perspective view to show the sixth embodiment of the mounting structure of the present invention; 
         FIG. 10  is a perspective view to show the seventh embodiment of the mounting structure of the present invention; 
         FIG. 11  is a perspective view to show the eighth embodiment of the mounting structure of the present invention; 
         FIG. 12  is a perspective view to show the ninth embodiment of the mounting structure of the present invention; 
         FIG. 13  is a perspective view to show the tenth embodiment of the mounting structure of the present invention; 
         FIG. 14  is a perspective view to show the eleventh embodiment of the mounting structure of the present invention; 
         FIG. 15  is a perspective view to show the twelfth embodiment of the mounting structure of the present invention; 
         FIG. 16  is a perspective view to show the thirteenth embodiment of the mounting structure of the present invention; 
         FIG. 17  is a perspective view to show the fourteenth embodiment of the mounting structure of the present invention; 
         FIG. 18  is a perspective view to show the fifteenth embodiment of the mounting structure of the present invention; 
         FIG. 19  is a perspective view to show the conventional socket; 
         FIG. 20  is a front view of the conventional socket; 
         FIG. 21  is a cross sectional view, taken along lint  21 - 21  of  FIG. 20 , and 
         FIG. 22  is an enlarged view to show the circle D of  FIG. 21 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIGS. 1 to 4 , the mounting structure of the present invention comprises a cylindrical body  10  which is a socket used with an electric tool or pneumatic tool. The body  10  has a mounting portion  11  formed on the first end thereof, and the mounting portion  11  is located parallel to the axis of the body  10 . A driving portion  12  is formed at the second end of the body  10 . Multiple protrusions  111  and multiple recesses  112  are alternatively formed in the inner periphery of the mounting portion  11 . Each of the protrusions  111  and the recesses  112  extend parallel to the axis of the body  10 . The protrusions  111  each have a curved and convex surface which extends along a straight line which is parallel to the axis of the body  10 . The recesses  112  each have a curved and concaved surface which extends along a straight line which is parallel to the axis of the body  10 . Each of the protrusions  111  is connected to each of the recesses  112  adjacent thereto by a first conjunction line  113  which is parallel to the axis of the body  10 . A rectangular recess is formed in the driving portion  12  of the body  10 . An annular groove  120  is defined in the n outer periphery of the second end of the body  10 . The mounting portion  11  has an opening  110  located at the first end of the body  10 . A first face  13  is defined annularly in the inner periphery of the opening  110  of the mounting portion  11 . The first face  13  is connected to one end of each of the protrusions  111  and the recesses  112 . A second face  14  is defined in one end of each protrusion  111  and located in the opening  110 . The first face  13  intersects the second faces  14  at an angle. The first face  13  is located closer to the first end of the body  10  than the second faces  14 . The first face  13  is an inclined face, and each of the second faces  14  is an inclined face. 
     As shown in  FIG. 4 , a first angle  15  is defined between the first face  13  and the first end face  100  of the body  10  (the first end face  100  of the body  10  is vertical with respect to the axis of the body  10 ). The first angle  15  is less than 90 degrees. A second angle  16  is defined between the second face  14  and the first end face of the body  10 . The second angle  16  is less than 90 degrees. The first angle  15  is different from the second angle  16 . The first angle  15  is larger than the second angle  16 . The first angle  15  is 30 to 60 degrees, and the second angle  16  is 20 to 50 degrees. The first angle  15  is 1.5 to 2.5 times of the second angle  16 . Preferably, the ratio between the first angle  15  and the second angle  16  is 5/3 or 2/1. A second conjunction line  141  is formed between the first face  13  and each of the second faces  14  of the protrusion  111 . Each of the second conjunction lines  141  intersects the first conjunction line  113  corresponding thereto at a conjunction point  142 . A support portion  17  is integrally formed on the end face of the first end of the body  10 . The support portion  17  extends radially from an edge of the first face  13 . 
     As shown in  FIG. 4 , when the mounting portion  11  rotates an object, the stress is mostly applied to the mounting portion  11  so that the torque is transferred from the second face  14  to the first face  13 . Because of the support portion  17  which extends radially from the edge of the first face  13 , so that the body  10  is able to transfer a larger torque to the object. Referring to  FIGS. 2 and 4 , a gap  130  defined on the first face  13  between a tip  1120  of one end of the recess  112  and the first end face  100 . 
       FIG. 5  shows the second embodiment of the mounting structure of the present invention, wherein the body  10  is a socket and has a rectangular recess defined in the second end of the body  10 . 
       FIG. 6  is a perspective view to show the third embodiment of the mounting structure of the present invention, wherein the body  10  is a socket  121  with two open ends. 
       FIG. 7  is a perspective view to show the fourth embodiment of the mounting structure of the present invention, wherein the body  10  is a driving head of a wrench  122 . 
       FIG. 8  is a perspective view to show the fifth embodiment of the mounting structure of the present invention, wherein the body  10  is a ratchet wheel  123 . 
       FIG. 9  is a perspective view to show the sixth embodiment of the mounting structure of the present invention, wherein the mounting portion  11  of the body  10  is a hexagonal recess which has six protrusions  111  and six recesses  112 . The first conjunction line  113  does not intersect the second conjunction line  141 . 
       FIG. 10  is a perspective view to show the seventh embodiment of the mounting structure of the present invention, wherein the mounting portion  11  of the body  10  is a gear-type socket which has twelve protrusions  111  and twelve recesses  112 . Each of the protrusions  111  has two bent sides. 
       FIG. 11  is a perspective view to show the eighth embodiment of the mounting structure of the present invention, wherein the body  10  is a driving head connected with a rod  124 . 
       FIG. 12  is a perspective view to show the ninth embodiment of the mounting structure of the present invention, wherein the body  10  is a driving head on an universal connector which is connected to an end of a rod  125   
       FIG. 13  is a perspective view to show the tenth embodiment of the mounting structure of the present invention, wherein the body  10  is a driving head connected with a movable universal connector  126 . 
       FIG. 14  is a perspective view to show the eleventh embodiment of the mounting structure of the present invention, wherein the body  10  is a driving head connected to a ball-type universal connector on an end of a rod  127 . 
       FIG. 15  is a perspective view to show the twelfth embodiment of the mounting structure of the present invention, wherein the body  10  is a driving head connected to a ball-type universal connector  128 . 
       FIG. 16  is a perspective view to show the thirteenth embodiment of the mounting structure of the present invention, wherein the body  10  is a driving head connected with a polygonal universal connector  129 . 
       FIG. 17  is a perspective view to show the fourteenth embodiment of the mounting structure of the present invention, wherein the first angle  15  is smaller than the second angle  16 . 
       FIG. 18  is a perspective view to show the fifteenth embodiment of the mounting structure of the present invention, wherein the first angle  15  is 90 degrees. 
     The advantages of the present invention are that when the mounting portion  11  of the body  10  rotates an object, the stress is mostly applied to the mounting portion  11  so that the torque is transferred from the second face  14  to the first face  13 , and then is absorbed by the support portion  17 . The body  10  can be used with a larger torque. 
     The first and second angles  15 ,  16  are different so that when the torque is transferred from the second face  14  to the first face  13 , the angle that the torque is transferred to changes along with the change of the angle so that the body  10  can bear a larger torque and has a longer life of use. 
     While we have shown and described the embodiment 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.