Patent Application
20180001395
The disclosure relates to a dust vacuuming drill device, and more particularly to a dust vacuuming drill device with an internal dust passageway, and method for producing the drill device.
Referring to
Therefore, referring to
Accordingly, drilling dust can be sucked from the through hole 201 into the suction device 23 through the tubular bit shaft 212, the through hole 202 and the chamber 220. However, with such a tubular shaft structure of the hollow drill bit unit 21, the bit tip 211 directly contacting a concrete surface 100 is liable to break and damage, which renders the entire drill device 2 nonfunctional. Increasing the diameter of the bit tip or reducing the dimension of the through hole 201 to solve the above-described problem results in complicated production process and low vacuum effect.
Therefore, an object of the disclosure is to provide a dust vacuuming drill device that can alleviate at least one of the drawbacks of the prior art.
According to the disclosure, the dust vacuuming drill device includes a drill unit and a driven shank. The drill unit includes a bit shaft having a tubular shaft wall which is elongated in a lengthwise direction to terminate at proximate and distal shaft ends and which has a shaft inner wall surface that defines a longitudinal passage extending in the lengthwise direction and through the proximate shaft end, a bit tip integrally connected to the distal shaft end and having at least one first penetrating hole in communication with the longitudinal passage for dust access to the longitudinal passage, and an externally threaded portion disposed on the proximate shaft end. The driven shank includes a shank body having a tubular shank wall which is elongated in the lengthwise direction to terminate at proximate and distal shank ends such that the tubular shank wall is disposed to penetrate through a communicating chamber of a socket from one bit end of the socket to project the proximate shank end outwardly from the other bit end of the socket, and which has a shank inner wall surface that defines a communicating passage extending in the lengthwise direction and through the proximate shank end, and at least one second penetrating hole which is configured in communication with the communicating passage and which is adapted to be disposed in the communicating chamber to be in communication with a suction device end of the socket, a driven portion integrally connected to the distal shank end for coupling with a driving device, and an internally threaded portion disposed on the proximate shank end and configured to be threadedly engaged with the externally threaded portion to communicate the longitudinal passage with the communicating passage such that the first penetrating hole, the longitudinal passage, the communicating passage and the second penetrating hole cooperatively define an internal dust passageway.
A method for producing a drill unit of a dust vacuuming drill device, comprising: providing a tubular shaft which has a longitudinal passage therein opened at a proximate shaft end, forming external threads on the proximate shaft end of the tubular shaft, forming at least one slot in a distal shaft end of the tubular shaft opposite to the proximate shaft end, welding a bit tip to the slot, and drilling into the bit tip at least one penetrating hole in communication with the longitudinal passage.
A method for producing a driven shank of a dust vacuuming drill device, comprising: providing a tubular shank which has a communication passage therein opened at a proximate shank end, forming an internally threaded portion on the proximate shank end, pressing an opposite end of the tubular shank to form a plurality of retaining grooves therein, and drilling into the tubular shank between the internally threaded portion and the retaining grooves at least one penetrating hole in communication with the communication passage.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiment with reference to the accompanying drawings, of which:
Referring to
The drill unit 3 includes a bit shaft 31, a bit tip 32 and an externally threaded portion 33. The bit shaft 31 has a tubular shaft wall 310 which is elongated in the lengthwise direction to terminate at proximate and distal shaft ends 311, 312, and which has a shaft inner wall surface that defines a longitudinal passage 300 extending in the lengthwise direction and through the proximate shaft end 311 to form an end opening 301. The bit tip 32 is integrally connected to the distal shaft end 312, and has at least one first penetrating hole 321 in communication with the longitudinal passage 300 for dust access to the longitudinal passage 300. The externally threaded portion 33 is integrally formed on the proximate shaft end 311. Referring to
The driven shank 4 includes a shank body 41, a driven portion 44 and an internally threaded portion 42. The shank body 41 has a tubular shank wall 410 which is elongated in the lengthwise direction to terminate at proximate and distal shank ends 413, 414 such that the tubular shank wall 410 is disposed to penetrate through the communicating chamber 500 of the socket 5 from the bit end 501 to project the proximate shank end 413 from the bit end 502, and which has a shank inner wall surface 411 that defines a communicating passage 400 extending in the lengthwise direction and through the proximate shank end 413 to form an end opening 401, and at least one second penetrating hole 43 which is configured in communication with the communicating passage 400 and which is adapted to be disposed in the communicating chamber 500 to be in communication with the suction device end 503 of the socket 5. The driven portion 44 is integrally connected to the distal shank end 414, and has a plurality of retaining grooves 441 for retaining a driving device (not shown) so as to be rotated relative to the socket 500. The internally threaded portion 42 is integrally formed on the proximate shank end 413 and extends from the end opening 401 to be threadedly engaged with the externally threaded portion 33 so as to communicate the longitudinal passage 300 with the communicating passage 400. Thus, the first penetrating hole 321, the longitudinal passage 300, the communicating passage 400 and the second penetrating hole 43 cooperatively define an internal dust passageway.
By the suction of the vacuum suction device 6, drilling dust during a hole-drilling operation is sucked from the drilled hole into the suction device 6 through the internal dust passageway without the need of a further dust removal work.
With respect to the bit tip 32, alternatively, referring to
Referring again to
Accordingly, the drill unit 3 and the driven shank 4 may be produced separately. Referring to
Referring to
In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiment. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects.
While the disclosure has been described in connection with what is considered the exemplary embodiment, it is understood that this disclosure is not limited to the disclosed embodiment but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
