Processing device with electrical conduction function

Abstract

A machining apparatus with electrical conduction function includes a spindle unit, a detachable tool holder unit connected to the spindle unit, an electronic control unit mounted on the tool holder unit, and a power transmission unit electrically connected to the electronic control unit. The power transmission unit includes a first transmission module mounted on a rotating shaft and about an axis, and a second transmission module mounted on the tool holder unit. The second transmission module has two second conductive elements. Each of the second conductive elements is movable relative to the first transmission module along a virtual line passing through its center, until it extends out of the tool holder unit and contacts the first transmission module. The virtual lines are offset from and do not intersect the axis. This allows the second conductive elements sufficient movement space without changing the thickness of the tool holder unit.

Claims

1. A machining apparatus with electrical conduction function, suitable for connecting a cutting tool, comprising: a spindle unit including a bearing and a rotating shaft rotatably disposed therethrough, the rotating shaft having an inner surface surrounding an axis and defining an interface; and a tool holder unit detachably connected to the interface and suitable for connecting the cutting tool, including an annular wall surrounding the axis and defining a chamber. An electronic control unit is installed on the handle unit; and a power transmission unit includes a first transmission module and a second transmission module for transmitting power. The first transmission module is installed on the shaft and has two phase-spaced first conductive elements that are about the axis. Each of the first conductive elements has a contact surface formed on the inner surface of the shaft. The second transmission module is installed on the annular wall of the handle unit and electrically connected to the electronic control unit. It has two phase-spaced second conductive elements. Each of the second conductive elements is movable relative to its respective first conductive element along a virtual line passing through the center and has a contact point that can pass through the handle unit and contact its respective contact surface. The virtual lines are offset from and do not intersect the axis and the chamber.

2. The processing apparatus with electrical conduction function as described in claim 1, wherein, The extension direction of these virtual lines is substantially perpendicular to the extension direction of the axis. The first conductive elements are arranged in the same plane at intervals along a direction perpendicular to the axis, and each of the first conductive elements is arc-shaped. The second conductive elements are located on both sides of the axis and are arranged in the same plane.

3. The processing apparatus with electrical conduction function as described in claim 1, wherein, The first conductive elements are spaced apart on different planes along the direction of the axis, and each of the first conductive elements is annular. The second conductive elements are spaced apart on different planes along the direction of the axis.

4. The processing apparatus with electrical conduction function as claimed in claim 1 further includes a ring member configured as an O-ring, a seal, or a gasket, mounted between the shaft and the ring wall, and located adjacent to the open end of the interface and outside the first conductive members and the second conductive members along the axial direction.

5. The processing apparatus with electrical conduction function as described in claim 1, wherein, The handle unit also includes two channels extending from the outer peripheral surface of the ring wall along the virtual lines, each of the second conductive elements extending along its respective virtual line and movably inserted into its respective channel.

6. The processing apparatus with electrical conduction function as described in claim 5, wherein, The annular wall is defined with a thickness in a direction perpendicular to the axis, each channel is defined with a first length in the direction of its respective virtual line, and each second conductive element is defined with a second length in the direction of its respective virtual line, the second length being greater than the thickness and less than the first length.

7. The processing apparatus with electrical conduction function as described in claim 5, wherein, The shaft is capable of generating a centrifugal force during rotation, causing the second conductive elements to move toward the first conductive elements.

8. The processing apparatus with electrical conduction function as described in claim 5, wherein, The second transmission module also has two elastic elements, each of which is inserted into its respective channel and abuts against the annular wall and its respective second conductive element, generating an elastic force that causes the second conductive elements to move toward the first conductive elements.

9. The processing apparatus with electrical conduction function as claimed in claim 5 further comprises two dustproof components, each of which is configured as an elastic scraper ring, a brush ring, or a ring cover, installed in a respective channel and adjacent to the opening end of the respective channel, and each of the second conductive components passes through the respective dustproof component along a respective virtual line and contacts the respective dustproof component.

10. The processing apparatus with electrical conduction function as described in claim 1, wherein, The power transmission unit further includes a third transmission module, which has a first magnetic conductor mounted on the rotating shaft and surrounding the axis, and a second magnetic conductor mounted on the shaft seat and surrounding the first magnetic conductor. The first magnetic conductor is electrically connected to the first transmission module, and the second magnetic conductor is used to input electrical energy and transmit electrical energy to the first magnetic conductor through electromagnetic induction.

Images