Spindle device

Abstract

A spindle device comprises a shaft seat, a rotating shaft rotatably inserted into the shaft seat, a shaft cover detachably connected to the front end face of the rotating shaft, and an electric energy transmission unit. The rotating shaft comprises a front end portion suitable for connecting a tool handle. The shaft cover defines a through opening for the front end portion to pass through around an axis, and defines a receiving space together with the front end face and the front end portion. The electric energy transmission unit comprises a first transmission module sleeved on the front end portion and inserted into the receiving space, and a second transmission module installed between the shaft seat and the shaft cover and inserted into the receiving space. The second transmission module surrounds the first transmission module and can transmit electric energy through electromagnetic induction. Thereby, the electric energy transmission unit is hidden and protected by the shaft cover, and the smoothness of the rotation of the rotating shaft is improved.

Description

Technical Field

[0001] The utility model relates to a spindle device suitable for a processing machine, in particular to a spindle device with an electric energy transmission function. Background Art

[0002] An existing high-frequency vibration spindle system disclosed in Taiwan Patent No. TWI671159 includes a spindle seat, a spindle that can be rotatably inserted into the spindle seat and is suitable for connecting an ultrasonic tool handle, a first sensing module arranged on the front end surface of the spindle seat, and a second sensing module arranged on the spindle and facing the first sensing module. The first sensing module is used to input electrical energy. The second sensing module transmits electrical energy to the ultrasonic tool handle through electromagnetic induction. Thereby, the ultrasonic tool handle can generate vibration during processing.

[0003] The first sensing module and the second sensing module of the high-frequency vibration spindle system face each other with their front and rear faces respectively. If the sensing area is to be expanded, the diameter can only be increased, and there is a technical problem that the diameter width cannot be reduced. In addition, the first sensing module and the second sensing module are exposed to the outside. During the processing of the ultrasonic tool handle, dust and debris are easily embedded between the first sensing module and the second sensing module, which affects the smoothness of the spindle rotation and hinders the transmission of electrical energy. Utility Model Content

[0004] The utility model aims to provide a main shaft device which can reduce the diameter width and improve the smoothness of rotation and transmission of electric energy.

[0005] The main shaft device of the utility model is suitable for being detachably connected to a tool handle capable of converting electric energy into vibration energy. The main shaft device comprises a shaft seat, a rotating shaft, a shaft cover, and an electric energy transmission unit.

[0006] The shaft seat includes a front end face and a rear end face opposite to the front end face along the axis direction.

[0007] The rotating shaft is rotatably inserted into the shaft seat and comprises a front end portion suitable for connecting with the tool handle.

[0008] The shaft cover is detachably connected to the front end face, and the shaft cover surrounds the axis to define a through hole for the front end portion to pass through, and defines a receiving space with the front end face and the front end portion.

[0009] The electric energy transmission unit includes a first transmission module which is sleeved on the front end portion and inserted into the accommodating space, and a second transmission module which is installed between the shaft seat and the shaft cover and inserted into the accommodating space. The second transmission module surrounds the first transmission module and can transmit electric energy through electromagnetic induction.

[0010] In the spindle device of the utility model, the shaft seat further comprises a notch portion extending from the front end face toward the rear end face and surrounding the axis, and the second transmission module is installed in the notch portion and partially passes through the front end face.

[0011] The spindle device of the utility model, the rotating shaft also includes a front axial surface connected to the front end portion, a rear axial surface opposite to the front axial surface along the direction of the axis, an annular edge formed on the outer peripheral surface and adjacent to the front axial surface, and a notch portion extending from a side surface of the annular edge that is in the same direction as the front axial surface to another side surface that is in the same direction as the rear axial surface, and the first transmission module is installed in the notch portion.

[0012] In the spindle device of the utility model, the first transmission module has a first length along the direction of the axis, and the second transmission module has a second length along the direction of the axis that is smaller than the first length.

[0013] The spindle device of the utility model further comprises a cover unit, wherein the cover unit comprises the shaft cover and a plurality of bolts, wherein the bolts can be detachably passed through the shaft cover along the direction of the axis to be connected to the shaft seat after abutting against the shaft cover.

[0014] The spindle device of the utility model further includes a cover unit, which includes the shaft cover and a gasket. The shaft cover has an annular groove which opens toward the shaft seat and is spaced apart from the front end face along the direction of the axis. The gasket is installed in the annular groove and presses against the second transmission module.

[0015] The spindle device of the utility model, the power transmission unit also includes two

[0016] The conductive modules at the front end are each electrically connected to the first transmission module and have a conductive contact passing through the front end along the direction of the axis, the conductive contact can be detachably electrically connected to the handle and is used to transmit electrical energy to the handle.

[0017] The spindle device of the utility model, the rotating shaft also includes a front axial surface connected to the front end portion, and a rear axial surface along the direction opposite to the front axial surface along the axis, the front end portion has two first lines extending from the front axial surface toward the rear axial surface, and two second lines, each of the second lines extends from the outer peripheral surface toward the direction of the corresponding first line and is connected to the corresponding first line, each of the conductive modules also has an electrical connection, the electrical connection is inserted between the corresponding first line and the corresponding second line, and is electrically connected to the conductive contact and the first transmission module.

[0018] The beneficial effect of the utility model is that the power transmission unit is hidden and protected by the shaft cover, and the first transmission module and the second transmission module are arranged in a manner of surrounding the axis. Thus, the shaft cover blocks dust and debris, and the sensing area can be expanded without increasing the diameter width by simply increasing the length of the first transmission module and the second transmission module along the axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

[0020] Figure 1 is a schematic cross-sectional view illustrating an embodiment of the spindle device of the utility model connected to a tool handle;

[0021] Figure 2 is a partial three-dimensional exploded schematic diagram of the embodiment;

[0022] Figure 3 is a partially enlarged cross-sectional schematic diagram of the embodiment;

[0023] Figure 4 It is a fragmentary cross-sectional view of the embodiment. DETAILED DESCRIPTION

[0024] See also Figure 1 to Figure 4 An embodiment of the spindle device of the utility model is suitable for being detachably connected to a tool handle 1. The tool handle 1 includes a handle body 11, an ultrasonic oscillator 12 installed in the handle body 11 and capable of converting electrical energy into vibration energy, a handle head 13 for connecting a tool (not shown) and capable of transmitting vibration energy to the tool, and two terminal groups 14 installed in the handle body 11 and electrically connected to the ultrasonic oscillator 12. Each of the terminal groups 14 has a conductive terminal 141 that passes through the handle body 11 and can be elastically moved along an axis X. The spindle device includes a shaft seat 2, a rotating shaft 3, a plurality of bearings 4, a clamping unit 5, a cover unit 6, and an electric energy transmission unit 7.

[0025] The shaft seat 2 surrounds the axis X and includes a front end face 21 , a rear end face 22 along the axis X in the opposite direction to the front end face 21 , and a notch portion 23 extending from the front end face 21 toward the rear end face 22 and surrounding the axis X.

[0026] The rotating shaft 3 is rotatably inserted in the shaft seat 2, and includes a front axial surface 31, a rear axial surface 32 opposite to the front axial surface 31 along the direction of the axis X, a front end portion 33 connected to the front axial surface 31 and surrounding the axis X to define an interface 30, a rim 34 formed on the outer circumference and spaced from the front axial surface 31 along the direction of the axis X, and a notch portion 35 extending from one side of the rim 34 in the same direction as the front axial surface 31 to the other side in the same direction as the rear axial surface 32. The interface 30 is suitable for sleeved with the handle body 11. The front end portion 33 has two first lines 331 extending from the front axial surface 31 to the rear axial surface 32 and spaced at equal angles, and two second lines 332. Each second line 332 extends from the outer circumference to the direction of the corresponding first line 331 and is connected to the corresponding first line 331. The rim 34 is adjacent to the front axial surface 31.

[0027] The bearing 4 is disposed between the rotating shaft 3 and the shaft seat 2 .

[0028] The clamping unit 5 is installed in the rotating shaft 3 and is used for detachably clamping the handle 11 of the knife handle 1.

[0029] The cover unit 6 includes a shaft cover 61 , a gasket 62 , and a plurality of bolts 63 .

[0030] The shaft cover 61 is detachably connected to the front end face 21 and defines a through hole 610 around the axis X for the front end portion 33 to pass through. The shaft cover 61, the front end face 21, and the front end portion 33 define a receiving space 60, which has an annular groove 611 that opens toward the shaft seat 2 and is spaced apart from the front end face 21 along the direction of the axis X.

[0031] The gasket 62 is installed in the annular groove 611 .

[0032] The bolt 63 can be detachably passed through the shaft cover 61 along the direction of the axis X, and is connected to the shaft seat 2 after abutting against the shaft cover 61 .

[0033] The power transmission unit 7 includes a first transmission module 71 installed in the notch portion 35 and passing through the accommodation space 60, a second transmission module 72 installed in the notch portion 23 and passing through the accommodation space 60, and two transmission modules 71 installed in the front end portion 33 and passing through the accommodation space 60.

[0034] Conductive modules 73 are spaced at equal angles.

[0035] The first transmission module 71 is sleeved on the front end portion 33 of the rotating shaft 3 and extends along the direction of the axis X. The first transmission module 71 has a first length L1 along the direction of the axis X. In this embodiment, the first transmission module 71 is electrically connected to an external power source and is used to input electrical energy.

[0036] The second transmission module 72 surrounds the first transmission module 71 and extends along the direction of the axis X and partially passes through the front end surface 21. The second transmission module 72 is inserted between the shaft seat 2 and the shaft cover 61 and is pressed by the gasket 62. The second transmission module 72 has a second length L2 along the direction of the axis X that is smaller than the first length L1.

[0037] Each of the conductive modules 73 is electrically connected to the first transmission module 71, and has a conductive contact 731 passing through the front axial surface 31 along the direction of the axis X, and an electrical connection 732 passing between the corresponding first wire 331 and the corresponding second wire 332. The electrical connection 732 is electrically connected to the conductive contact 731 and the first transmission module 71.

[0038] When the handle 11 of the knife handle 1 is inserted into the interface 30 and connected to the front end 33 of the rotating shaft 3, the conductive terminal 141 of the terminal group 14 will contact the conductive contact 731 of the conductive module 73. In this way, during the rotation of the rotating shaft 3, the second transmission module 72 sleeved on the front end 33 of the rotating shaft 3 and surrounding the first transmission module 71 can transmit electric energy through electromagnetic induction, so that the electric energy is transmitted from the second transmission module 72 to the ultrasonic oscillator 12 through the conductive module 73 and the terminal group 14 of the knife handle 1.

[0039] When the rotating shaft 3 drives the tool handle 1 to rotate, the ultrasonic oscillator 12 can convert electrical energy into vibration energy, so that the tool can break the material during the processing by combining grinding and high-frequency vibration processing technology. In this way, high-hardness materials can be easily processed, and the cutting stress during processing can be reduced, thereby extending the life of the tool and improving the processing quality.

[0040] See also Figure 1 and Figure 4When assembling the power transmission unit 7, the bolt 63 only needs to be removed to remove the shaft cover 61 from the shaft seat 2, thereby exposing the notch 23, the notch 35, the first wire channel 331, and the second wire channel 332. Thus, the electrical connection 732 only needs to be inserted into the first wire channel 331 and the second wire channel 332, and then the first transmission module 71 is inserted into the notch 35 and the second transmission module 72 is inserted into the notch 23 along the direction of the axis X, and then the conductive contact 731 is installed on the front end portion 33. Finally, the bolt 63 is used to lock the shaft cover 61 in the

[0041] The front end surface 21 of the shaft seat 2 can encapsulate the first transmission module 71 and the second transmission module 72 in the accommodating space 60 through the shaft cover 61 .

[0042] Similarly, when maintaining the power transmission unit 7, it is only necessary to remove the shaft cover 61 to expose the first transmission module 71, the second transmission module 72, and the conductive contact 731, so as to facilitate maintenance or replacement.

[0043] Through the above description, the advantages of the above embodiments can be summarized as follows:

[0044] 1. The utility model can install and maintain the power transmission unit 7 by only removing the shaft cover 61, thereby improving the simplicity of installation and maintenance.

[0045] 2. In addition, by designing that the first transmission module 71 surrounds the second transmission module 72 and the first length L1 is greater than the second length L2, in addition to improving the accuracy of mutual correspondence, the sensing area can be expanded without increasing the diameter width by simply increasing the length of the first transmission module 71 and the second transmission module 72 along the direction of the axis X.

[0046] 3. Importantly, the first transmission module 71 and the second transmission module 72 are enclosed in the accommodation space 60 by the shaft cover 61, and dust or debris will be blocked by the shaft cover 61. This can improve the smoothness of the rotation of the shaft 3 and the efficiency of transmitting electrical energy.

[0047] The above description is only an embodiment of the present invention, and should not be used to limit the scope of the present invention. That is, any simple equivalent changes and modifications made according to the claims and the description of the present invention still fall within the scope of the present invention.

Claims

1. A spindle device, suitable for being detachably connected to a tool handle capable of converting electrical energy into vibration energy, the spindle device comprising: The shaft seat comprises a front end face and a rear end face opposite to the front end face along the axis direction; A rotating shaft, rotatably inserted into the shaft seat, including a front end portion suitable for connecting to the tool handle; a shaft cover, detachably connected to the front end surface; and Power transmission unit; Features: The shaft cover surrounds the axis to define a through hole for the front end portion to pass through, and defines a receiving space with the front end surface and the front end portion; The electric energy transmission unit includes a first transmission module which is sleeved on the front end portion and inserted into the accommodating space, and a second transmission module which is installed between the shaft seat and the shaft cover and inserted into the accommodating space. The second transmission module surrounds the first transmission module and can transmit electric energy through electromagnetic induction.

2. The spindle device according to claim 1, characterized in that: The shaft seat further includes a notch portion extending from the front end surface toward the rear end surface and surrounding the axis, and the second transmission module is installed in the notch portion and partially passes through the front end surface.

3. The spindle device according to claim 2, characterized in that: The rotating shaft also includes a front axial surface connected to the front end portion, a rear axial surface opposite to the front axial surface along the axis, an annular edge formed on the outer peripheral surface and adjacent to the front axial surface, and a notch portion extending from a side surface of the annular edge that is in the same direction as the front axial surface to another side surface that is in the same direction as the rear axial surface, and the first transmission module is installed in the notch portion.

4. The spindle device according to claim 3, characterized in that: The first transmission module has a first length along the direction of the axis, and the second transmission module has a second length along the direction of the axis that is smaller than the first length.

5. The spindle device according to claim 1, characterized in that: The spindle device further comprises a cover unit, which comprises the shaft cover and a plurality of bolts. The bolts can be detachably passed through the shaft cover along the axis direction and connected to the shaft seat after abutting against the shaft cover.

6. The spindle device according to claim 1, characterized in that: The spindle device also includes a cover unit, which includes the shaft cover and a gasket. The shaft cover has an annular groove that opens toward the shaft seat and is spaced apart from the front end face along the axis. The gasket is installed in the annular groove and presses against the second transmission module.

7. The spindle device according to claim 1, characterized in that: The power transmission unit also includes two conductive modules installed on the front end portion, each of which is electrically connected to the first transmission module and has a conductive contact passing through the front end portion along the direction of the axis. The conductive contact can be detachably electrically connected to the handle and is used to transmit electrical energy to the handle.

8. The spindle device according to claim 7, characterized in that: The rotating shaft also includes a front axial surface connected to the front end portion, and a rear axial surface along the direction opposite to the front axial surface. The front end portion has two first lines extending from the front axial surface toward the rear axial surface, and two second lines. Each of the second lines extends from the outer peripheral surface toward the direction of the corresponding first line and is connected to the corresponding first line. Each of the conductive modules also has an electrical connection, which is inserted between the corresponding first line and the corresponding second line, and is electrically connected to the conductive contact and the first transmission module.

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