(a) Field of the Invention
The present invention relates to a detachable cross wrench structure whose torque value can be adjusted, more particularly to a simple, easy and practical wrench capable of achieving the synergic effect of a quick rotation and a simple torque setting of the wrench through simple and easy insertion and setting adjustment.
(b) Description of the Related Art
With reference to U.S. Pat. No. 7,228,766 entitled “Detachable cross wrench” and issued to the inventor of the present invention, the detachable cross wrench refers to a specific wrench that can be disassembled for storage and quickly assembled for use, and such wrench is very suitable to be packaged, stored and used quickly while providing the effect of applying force easily to accelerate and assist the rotation of the wrench, so that such wrench is welcome by users. However, the inventor discovered later that professional users requiring a setting of the torque have to change to a torque adjusting wrench to prevent damages to a screw while applying too much force to secure the screw. It shows that such patented technology still has a minor shortcoming on performance.
As well known, the so-called torque adjusting wrench (not shown in the figure) refers to a wrench with a design of having an operating end and a force applying end engaged with each other, and a powerful elastic element for providing a strong friction between related component modules, so that when the force applied to the wrench reaches a predetermined value, a setback occurs at the engaging portion of the operating end and the force applying end, and users may know about the situation immediately and stop applying force to prevent damages to the wrench by excessive force.
From related literatures, we learn that all conventional torque adjusting wrenches are primarily designed with a F-shaped handle and most of them doe not come with a cross-shaped design, so that the wrench cannot be rotated quickly to shorten the operating time effectively and improve the operating efficiency, unless users carry both cross wrench and torque adjusting wrench all the time and use them alternately, and the operation by using both wrenches alternately brings tremendous inconvenience to users. Obviously, the conventional wrench requires improvements.
Therefore, it is a primary objective of the present invention to provide a detachable cross wrench set as a prototype, and the secondary bar is changed to a specific structure whose torque can be set by users, and the technical characteristics of both detachable cross wrench and torque adjusting wrench are combined into the detachable and torque-adjustable cross wrench.
According to the invention, a detachable and torque-adjustable cross wrench includes a primary bar and a torque-setting secondary bar, and an end of the primary bar is a socket insertion end and the other end of the primary bar is installed with an assistant turning handle provided for pivoting. A penetrating hole formed at a thickening middle section is provided for connecting the torque-setting secondary bar to form a cross wrench. The torque-setting secondary bar includes a plugging inner rod with a spacer ring slot, a force applying outer rod containing a torque-setting module, a handheld turning handle, an elastic pushing member, a torque-adjusting screw cap and a retaining ring. The torque-adjusting screw cap is provided for rotating and adjusting the torque-setting module to a predetermined torque value, so as to achieve an expected torque-setting.
The technical measures and characteristics of the present invention will become clearer in light of the following detailed description of an illustrative embodiment of this invention described in connection with the drawings.
With reference to
The primary bar 10 has an end which is a socket insertion end 11 provided for inserting a socket 50 and screwing a screw (not shown in the figure) and the other end installed with an assistant turning handle 12 provided for a screwing operation. In addition, the center portion of the primary bar 10 has a thickening middle section 14 with a penetrating hole 13, and a compression knob 15 installed adjacent to the penetrating hole 13 for providing a latching effect and operated in cooperation with a ring slot 211 of a plugging inner rod 21 of the torque-setting secondary bar 20 to provide the latching and releasing effects. In addition, an inner threaded hole 16 is formed at the bottom of the thickening middle section 14, such that when a positioning bold 17 is secured, and a front edge 171 of the positioning bold 17 is slightly extended into the penetrating hole 13 to give a positioning effect with a positioning slot 214 formed at a corresponsive position of the plugging inner rod 21 (as shown in
The torque-setting secondary bar 20 comprises a plugging inner rod 21 with a spacer ring slot 211, a force applying outer rod 22 having a torque-setting module 40 installed therein, a handheld turning handle 23, an elastic pushing member 24, a torque-adjusting screw cap 25 and a retaining ring 26, wherein a pivoting end 212 of the plugging inner rod 21 has a pin hole 213, and an insert pin 27 and a corresponsive pin hole 221 of the force applying outer rod 22 are provided for insertion and pivotal connection, so that the torque-setting module 40 can be adjusted to a predetermined torque value by the torque-adjusting screw cap 25 to achieve an expected torque-setting.
With reference to
With reference to
Number | Name | Date | Kind |
---|---|---|---|
7082863 | Wang | Aug 2006 | B1 |
7228766 | Shyu | Jun 2007 | B1 |
8960058 | Lai | Feb 2015 | B2 |
9032848 | Hsieh | May 2015 | B2 |
9149918 | Lee | Oct 2015 | B2 |
20140007699 | Mountz | Jan 2014 | A1 |
Number | Date | Country | |
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20170144280 A1 | May 2017 | US |