Patent Application
20220212273
The present invention relates to a cutter holder assembly, and more particularly to a cutter holder assembly capable of preventing a cutter thereof from falling.
A conventional cutter holder assembly capable of preventing a cutter thereof from falling includes a side lock holder, a cutter, and a fixation element. The side lock holder has a mounting groove. The cutter has a compression groove disposed on an outer surface of the cutter. To fix the cutter in the side lock holder, extend the cutter into the side lock holder firstly, and then rotate the cutter to align the compression groove of the cutter with the mounting groove of the side lock holder. Next, insert the fixation element into the mounting groove of the side lock holder and make the fixation element abut against the compression groove of the cutter to fix the cutter in the side lock holder.
However, after the cutter is extended into the side lock holder, the compression groove of the cutter is shielded by the side lock holder, and a user cannot see the position of the compression groove of the cutter from an exterior of the side lock holder. The user needs to rotate the cutter repeatedly to align the compression groove of the cutter with the mounting groove of the side lock holder. Overall, the conventional cutter holder assembly capable of preventing a cutter thereof from falling has the disadvantages of taking too much time for the user to rotate the cutter to align the compression groove of the cutter with the mounting groove of the side lock holder and being inconvenient in installation.
To overcome the shortcomings of the conventional cutter holder assembly capable of preventing a cutter thereof from falling, the present invention tends to provide a cutter holder assembly capable of preventing a cutter thereof from falling to mitigate or obviate the aforementioned problems.
The main objective of the present invention is to provide a cutter holder assembly capable of preventing a cutter thereof from falling.
The cutter holder assembly capable of preventing a cutter thereof from falling includes a cutter holder, an end cap, a cutter, a positioning key, a compressing element, and a nut. The cutter holder has a chamber and a mounting hole. The chamber is formed in the cutter holder and has at least one engaging groove. The at least one engaging groove is formed on an inner surface of the chamber and has a guiding channel and a limiting groove. The guiding channel is formed on the inner surface of the chamber and has a longitudinal direction. The limiting groove is formed on the inner surface of the chamber, communicates with the guiding channel, and has a longitudinal direction. An included angle is formed between the longitudinal direction of the limiting groove and the longitudinal direction of the guiding channel. The mounting hole is formed in the cutter holder and communicates with the chamber of the cutter holder.
The end cap is mounted on one of two end surfaces of the cutter holder adjacent to the chamber and has at least one guiding groove. The at least one guiding groove is formed on an inner surface of the end cap, is aligned with the guiding channel of the at least one engaging groove of the cutter holder, and communicates with the guiding channel. The cutter is inserted through the end cap, extends into the chamber of the cutter holder, and has a keyway formed on an outer surface of the cutter.
The positioning key is mounted in the keyway of the cutter and has a body and a protruding rod. The body is mounted in the keyway of the cutter. The protruding rod protrudes from one of two sides of the body away from the keyway of the cutter and is capable of extending into the guiding channel and the limiting groove of the at least one engaging groove, such that the positioning key is limited in the cutter holder along with the cutter. The compressing element is mounted to the mounting hole of the cutter holder and is capable of moving relative to the mounting hole along an axial direction of the cutter holder.
In such an arrangement, the compressing element abuts against one of two ends of the cutter inserted into the chamber of the cutter holder to tightly compress the protruding rod of the positioning key in the limiting groove of the at least one engaging groove. The nut is sleeved on the cutter holder and surrounds the chamber of the cutter holder. The positioning key is limited in the limiting groove of the at least one engaging groove of the cutter holder after the protruding rod of the positioning key is guided into the guiding channel and the limiting groove of the at least one engaging groove sequentially.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
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To prevent this circumstance, a user can extend a screwdriver into the mounting groove 12 of the cutter holder 10 to mount the screwdriver to the compressing element 60. Then, rotate the screwdriver to make the compressing element 60 rotate along with the screwdriver and mounted to the mounting hole 121 of the mounting groove 12. In the process of the compressing element 60 threaded to the mounting hole 121 of the mounting groove 12, the compressing element 60 moves relative to the mounting hole 121 and compresses the cutter 40 toward a direction away from the mounting groove 12, such that the protruding rod 52 of the positioning key 50 is tightly compressed in the limiting groove 113 of the at least one engaging groove 111.
With the aforementioned technical characteristics, the cutter holder assembly capable of preventing a cutter thereof from falling in accordance with the present invention has the following advantages.
1. After the protruding rod 52 of the positioning key 50 is aligned with the at least one guiding groove 31 of the end cap 30, the user only needs to extend the cutter 40 into the at least one guiding groove 31 of the end cap 30 and the guiding channel 112 of the at least one engaging groove 111 communicating with the at least one guiding groove 31 until the cutter 40 abuts against the compressing element 60 and rotate the cutter 40 to make the protruding rod 52 of the positioning key 50 extend into the limiting groove 113 of the at least one engaging groove 111 to assemble the cutter 40 with the cutter holder 10. Since the at least one guiding groove 31 of the end cap 30 and the guiding channel 112 of the at least one engaging groove 111 of the cutter holder 10 provide the positioning key 50 with guiding effects, the cutter holder assembly capable of preventing a cutter thereof from falling can be easily assembled and saves time in the assembling process. Compared with the conventional cutter holder assembly capable of preventing a cutter thereof from falling that should be assembled by rotating the cutter repeatedly to align the compression groove of the cutter with the mounting groove of the side lock holder, the cutter holder assembly capable of preventing a cutter thereof from falling in accordance with the present invention provides ease and time efficiency in assembly.
2. Since the protruding rod 52 of the positioning key 50 is guided by the at least one guiding groove 31 of the end cap 30 and the guiding channel 112 of the at least one engaging groove 111 of the cutter holder 10 during the assembling process, the positioning key 50 will not fall from the cutter holder 10.
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
