BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a sectional view shows the safety in use of the connecting mechanism of the present invention;
FIG. 4 is a partial plan view of the connecting rod of the present invention;
FIG. 5 is a partial plan view of the connecting rod being deformed of the present invention;
FIG. 6 is a partial plan view of the mark units and the indicating part of the present invention; and
FIG. 7 is a partial plan view of another embodiment of the connecting rod of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIG. 1 of the drawings, a connecting rod 10, the same as the traditional connecting rod in structure, is a cylindrical rod that has one end formed a bigger diameter driving end 11 with a square concavity and the other formed a smaller diameter square driven end 12. The features of the present invention are:
The connecting rod 10 has a grooved stop part 13 on proper location for implementing indicating mechanisms and a rotation handle 20.
Wherein the rotation handle 20 is mounted around the connecting rod 10, with cooperation of a lock ring 30 engaged on the stop part 13 of the connecting rod 10, the rotation handle 20 stays securely around the connecting rod 10 and is able to rotate thereon, which is convenient for the user to hold on directly while the connecting rod 10 is driven by pneumatic or power driving tools.
The rotation handle 20 is equipped with two bearings 21 on both ends. The outer peripheries of the bearings 21 are in tight fit with the inside of the rotation handle 20, the inner peripheries of the bearings 21 are in loose fit with the connecting rod 10, therefore the rotation handle 20 can be detached or mounted on the connecting rod 10 anytime.
The both sides of the stop part 13 of the connecting rod 10 of the present invention and the surface of the rotation handle 20 can all implement strength indicating mechanisms, wherein the both sides of the stop part 13 of the connecting rod 10 respectively have a continuous indicating part 14, a positioning reference point 15 and warning parts 16 on both sides of the positioning reference point 15. A concave strength control part 17 is implemented on the middle portion between the driving end 11 and the driven end 12. In addition, a base point 110 is implemented at the location where the connecting rod 10 is not covered by the rotation handle 20. A base line 200 in form of straight line is implemented on the surface of the rotation handle 20, and both sides of the base line 200 have S.I. or Imperial. Standard scales 201 respectively.
In such structure when the connecting rod 10 is used without the rotation handle 20, it can be used generally as a connecting rod 10 with strength control and indicating mechanism. Referring to FIG. 2, the rotation handle 20 is mounted around the connecting rod 10, with cooperation of the lock ring 30 engaged on the stop part 13 of the connecting rod 10, the rotation handle 20 stays securely around the connecting rod 10 and is able to rotate thereon. Therefore, while the connecting rod 10 is driven by pneumatic or power driving tools, the user can still hold on the outside of the rotation handle 20. After a period of time of using, the structure of the connecting rod 10 maybe in status of inner stress destruction, that is, the portions of both sides of the stop part 13 will be shifted, which means that the indicating part 14 can not be in line with the positioning reference point 15. Meanwhile, the indicating part 14 is covered by the rotation handle 20, the user is unable to notice that, therefore, the user can rotate the rotation handle 20 to have one end of the base line 200 coincide with the base point 100 on the connecting rod 10, with reference of the relativity between the other end of the base line 200, the positioning reference point 15 and the warning parts 16 on both sides. The condition of whether the connecting rod 10 being excessively deformed is realized for replacement, therefore the objectives of safety in use, as well as convenience in use will be attained.
Wherein the connecting rod 10 is mounted inside the rotation handle 20, the connecting rod 10 implements the strength control part 17 on the middle portion, as shown in FIG. 3. The user mounts the driving end 11 on a workpiece as a force reaction end (A), and the driven end 12 on a sleeve with handle as a force applying end (B). If the user is over applying force leading the strength control part 17 unbearable, the connecting rod 10 will break only within the rotation handle 20, causing the rotation being void to prevent the user from injury, then the objective of safety in use will be attained.
Wherein the indicating part 14 may be in structure of a simple straight line as shown in FIG. 4, the indicating part 14 is a continuous solid line. The first embodiment is that the indicating part 14 is in straight status and extends along the axis of the connecting rod 10. When the connecting rod 10 is forced by improper torque strength or the life time is due, the inner structure of the connecting rod 10 is changed, at this time the connecting rod 10 might cause unnecessary deformation as shown in FIG. 5. The place of stress concentration creates unnecessary twist, which causes changes in the indicating part 14 as shown in figure, the indicating part 14 is formed a continuous first turning point P1 and second turning point P2 thereon. When the turning points are formed, it is easy to be noticed by the user. In this condition, the user can decide whether the connecting rod 10 needs to be replaced or not, to meet the safety requirement.
Another embodiment is that the indicating part 14 includes mark units 40 designed as continuous shapes in schemes or alphabets as shown in FIG. 6. Wherein the mark units 40 may be ordinary marking of trademarks, scales, notes of S.I. or Imperial standard, or else.
The overall design can be as shown in FIG. 7, the indicating part 14 can be designed as multiple parallel straight lines, some baselines 50 can be provided in equal distance on the indicating part 14 for indication of standard observation sections, therefore the objectives of easy observation and optimal safety will be attained.
With implementation of the structure described above, the functions as follows would be derived:
1. Varieties of usages: with the implementation of the stop part 13 of the connecting rod 10 and the cooperation of the rotation handle 20, the rotation handle 20 can be mounted on or detached from at anytime to meet different requirements and the function of varieties of usages will be attained.
2. Remain the function of the strength control and indication: no matter the rotation handle 20 is mounted on or detached from the connecting rod 10, the function of strength indication can be efficiently remained, function of strength control and indication is extremely improved.
3. The scale 201 on the rotation handle 20 can be used as a rough reference in measurement, it can be used as a scale in hands when a measurement is needed temporarily, and the objective of quick in use will be attained.
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.
Patent Application
20080047401
