TWI691377B - Knife handle power supply spindle (2) - Google Patents

Abstract

A tool holder power supply spindle, which is used for an ultrasonic tool holder. The ultrasonic tool holder includes a body, a tool holder positive electrode, a tool holder negative electrode, a tool holder wire and a plurality of piezoelectric plates. The tool holder power supply spindle includes a housing and a rotating shaft , A first bearing, a second bearing and an electrical connector, the housing is provided with a built-in high-frequency motor for driving the rotating shaft, the first bearing is sleeved on an insulating seat, the insulating seat is connected It is mounted on the rotating shaft and rotates synchronously with the rotating shaft, and the second bearing is sleeved between the housing and the rotating shaft and is electrically connected to the housing and the rotating shaft. The electrical connector includes a first An electrode and a second electrode, the first electrode is electrically connected to the first bearing, and the second electrode is electrically connected to the housing.

Description

Knife handle power supply spindle (2)

This case relates to a knife handle power supply spindle, especially a knife handle power supply spindle that can generate an electrical connection circuit through an ultrasonic tool holder body.

The ultrasonic transmission spindle of the processing machine mainly uses an oscillator, such as the high frequency vibration of the piezoelectric sheet, so that the tool installed on the transmission spindle can generate high frequency oscillation, so that the tool can effectively reduce the cutting resistance, so that the workpiece to be processed The particles on the surface are separated one by one. When the workpiece to be processed is a hard and brittle material, such as glass, ceramics, zirconium dioxide, etc., if the ultrasonic transmission spindle can be used for processing, not only can the debris generated by the processing become thinner , At the same time can extend the service life of the tool.

In addition, when the ultrasonic drive spindle performs high-frequency vibration processing, the tool is added to the vibration source, so when the tool is in contact with the workpiece to be processed, the tool adds axial high-frequency vibration in addition to the rotation of the spindle, making the tool in double motion Next, the material removal of the workpiece to be processed is promoted. Therefore, the ultrasonic transmission spindle has the advantages of reducing machining resistance, improving processing efficiency, improving the roughness of the machining surface of the workpiece to be processed, and the tool itself does not stick to cutting debris due to vibration, and extends the service life of the tool, so the current ultrasonic transmission spindle It has been widely adopted by industry.

As shown in the "Self-cleaning Electrical Rotating Spindle Structure" of the National Patent Announcement No. M534047, it includes a main shaft; a conductive sleeve, which is sleeved on the main shaft and has two conductive rings; and a power supply sleeve It has a carbon brush ring seat and two carbon brush parts. The carbon brush ring seat sleeve is placed outside the conductive sleeve group and has a gap with the conductive sleeve group. The carbon brush ring seat has two radial directions on the peripheral surface An extended carbon brush accommodating hole and a radially extending blow hole, each of the carbon brush pieces radially penetrates the carbon brush accommodating hole, and contacts the conductive ring with one end thereof The carbon brushes introduce external power to the conductive rings, and the external air is introduced between the carbon brushes and the conductive rings through the blow holes.

Since the conventional technical means of the elastic carbon brush element uses the elastic element to provide elastic force to push each carbon brush element to move toward the main axis, if the compression amount of the elastic element is too large, the elastic force of the elastic element will be relatively increased , Which in turn causes the carbon brushes to wear more seriously; on the contrary, if the compression amount of the elastic member is too small, due to the insufficient elasticity of the thrust, the carbon brushes cannot contact the conductive ring, or even have a chance of breaking. , Is not an effective solution.

Therefore, how to provide a stable power supply for the piezoelectric piece of the ultrasonic drive spindle is a difficult problem for the related industry to overcome.

The main purpose of this case is to provide a power supply spindle for the blade handle, which can generate an electrical connection circuit through the body of the ultrasonic blade handle to provide a stable power supply to the ultrasonic blade handle, to overcome the conventional carbon brushes that are prone to deposit carbon, thereby reducing the conductivity , Short circuit power failure and high heat and other adverse effects.

In order to achieve the foregoing purpose, the technical means adopted in this case is to provide a tool holder power supply spindle for an ultrasonic tool holder, which includes a body; a tool holder positive electrode disposed inside the body; and a tool holder positive electrode; A knife handle negative pole inside the body, the knife pole electrically connecting the negative pole to the body; a knife handle wire connected to the knife pole positive pole; and a plurality of piezoelectric plates electrically connected to the knife pole positive pole and the knife pole negative pole; wherein the body At least one connecting portion is provided, the tool connects the wire axially to an electrode contact provided in each connecting portion; and the tool holder power supply spindle includes a housing with a built-in high frequency for driving a rotating shaft A motor, the motor is provided with a stator on an inner peripheral surface of the casing, and a rotor is sleeved on an outer peripheral surface of the rotating shaft, so that the rotor drives the rotating shaft to rotate; a first set on an insulating base A bearing, the insulating seat is connected to the rotating shaft, and rotates synchronously with the rotating shaft; a second bearing set between the housing and the rotating shaft, the second bearing is electrically connected to the housing and the rotating A shaft; and an electrical connector including a first electrode and a second electrode, the first electrode is electrically connected to the first bearing and an electrode axially disposed in the insulating seat and corresponding to each electrode contact Contact, and the second electrode is electrically connected to the housing; when the body is plugged into the rotating shaft, so that the insulating base contacts each of the connecting parts, the first electrode passes through the first bearing, the electrode is connected The point, the electrode contact, and the blade wire are electrically connected to the positive pole of the blade; and the second electrode is electrically connected to the negative pole of the blade through the housing, the second bearing, the rotating shaft, and the body.

In an embodiment, it further includes a fixing ring attached to the housing and an insulating outer ring attached to the fixing ring, the insulating outer ring is provided for the insulation seat to pass through, so that the insulation seat and the fixing ring The first bearing is enclosed; the electrical connector is fixed on the insulating outer ring and the fixing ring through a first locking member and a second locking member, respectively.

In an embodiment, the first bearing includes a first outer ring, a first inner ring and a plurality of first balls, the plurality of first balls are disposed between the first outer ring and the first inner ring The second bearing includes a second outer ring, a second inner ring and a plurality of second balls, the plurality of second balls are disposed between the second outer ring and the second inner ring; wherein the outer shell resists Connected to the second outer ring, the rotating shaft is sleeved to the second inner ring, the first electrode is connected to the first locking member through a first wire, and the first locking member is connected to the first locking member through an elastic member An outer ring; and the second electrode is connected to the second locking member fixed to the fixing ring through a second wire.

In one embodiment, the second bearing is installed between a locking ring locked to the rotating shaft and a spacer fixed to the rotating shaft.

In an embodiment, the body includes a limiting portion, the limiting portion has at least one notch, and the rotating shaft includes at least one limiting member. When the body is inserted into the rotating shaft, each of the limiting portions The piece fits into each of the notches.

In one embodiment, it further includes an insulating component including an outer insulating member adjacent to the first outer ring and an inner insulating member adjacent to the first inner ring to avoid the first bearing and The fixed ring contacts.

Please refer to FIG. 1 to FIG. 5, this embodiment provides a power supply spindle 1 for a tool holder, which is used for an ultrasonic tool holder 2. The ultrasonic tool holder 2 includes a body 21, a positive electrode 22, a negative electrode 23, and a tool holder The wire 24, and a plurality of piezoelectric sheets 25. The blade positive electrode 22 and the blade negative electrode 23 are arranged inside the body 21, the blade negative electrode 23 is electrically connected to the body 21, and the blade wire 24 is connected to the blade positive electrode 22. As shown in FIG. 2, the blade positive electrode 22 and the blade negative electrode 23 are electrically connected to a plurality of piezoelectric sheets 25.

Therefore, when the circuit is closed, the ultrasonic blade 2 can be vibrated in the axial direction of the ultrasonic blade 2 through the piezoelectric plates 25 for processing. In order to transmit the vibrations of the piezoelectric plates 25 to the body 21 of the ultrasonic blade handle 2 more uniformly, the ultrasonic blade handle 2 further includes a telescopic member 26, a coupling member 27 and an amplitude rod 28. The sheet 25 is locked to the amplitude rod 28 through the telescopic member 26 and the coupling member 27, thereby preventing the piezoelectric sheets 25 from scattering inside the body 21.

On the other hand, please refer to FIG. 1, FIG. 3 to FIG. 4 again, the tool holder power supply spindle 1 includes a housing 11, a power source 111, a rotating shaft 12, a first bearing 13, a second bearing 14, and a Electric connector 15. A power source 111 is provided in the housing 11 to drive the rotating shaft 12 to rotate. In this embodiment, the power source 111 is a built-in high-frequency motor. The motor is provided with a stator 111a on an inner peripheral surface of the housing 11 and sleeved on an outer peripheral surface of the rotating shaft 12 A rotor 111b, and the stator 111a is coupled to a power switch (not shown) fixed on the outer side of the casing with at least two wires. Therefore, the stator 111a obtains the DC power from the power switch and uses electromagnetic action to cause the rotor 111b to rotate the rotating shaft 12.

The first bearing 13 is disposed on the rotating shaft 12 in an insulated manner, and the electrical connector 15 is electrically connected to the first bearing 13 and the housing 11. Specifically, the first bearing 13 electrically connects a part of the positive circuit in the circuit when the power supply spindle 1 of the tool holder supplies power to the ultrasonic handle 2, and the housing 11 supplies power to the ultrasonic tool holder 2 of the power supply spindle 1 of the handle A part of the negative circuit in the circuit is electrically connected. Preferably, the second bearing 14 of the power supply spindle 1 is disposed between the housing 11 and the rotating shaft 12, which will be described in detail later.

Please refer to FIGS. 3 to 5. The power supply spindle 1 of this embodiment further includes a fixed ring 16 attached to the housing 11 and an insulating seat 17 attached to the rotating shaft 12, wherein the insulating seat 17 further includes An insulating outer ring 171 is provided for the insulating seat 17 to pass through and be fixed on the fixing ring 16 so that the insulating seat 17 and the fixing ring 16 sandwich the first bearing 13. In addition, in order to provide the insulation effect of the first bearing 13 and the fixing ring 16, an insulating component 134 is provided between the two to avoid short circuit caused by contact between the first bearing 13 and the fixing ring 16.

Furthermore, the electrical connector 15 is suitable for connecting an external power source through a plug. The electrical connector 15 includes a first electrode 151, such as a positive electrode 151, and a second electrode 152, such as a negative electrode. A first locking member 155 is fixed on the insulating outer ring 171 and is electrically connected to the first bearing 13, and the second electrode 152 is fixed on the fixing ring 16 through a second locking member 156 and is electrically connected于该壳11。 The shell 11.

In addition, the power supply spindle 1 of the tool holder further includes a second bearing 14 sleeved between the rotating shaft 12 and the housing 11, so that the second bearing 14 is electrically connected to the housing 11 and the rotating shaft 12 . Wherein, the second bearing 14 is installed between a locking ring 121 locked to the rotating shaft 12 and a spacer 122 fixed to the rotating shaft 12.

Furthermore, the first bearing 13 includes a first outer ring 131, a first inner ring 132 and a plurality of first balls 133, wherein the first balls 133 are disposed on the first outer ring 131 and the first Between the inner ring 132; the second bearing 14 includes a second outer ring 141, a second inner ring 142 and a plurality of second balls 143, wherein the plurality of second balls 143 are disposed on the second outer ring 141 and Between the second inner ring 142. The housing 11 abuts the second outer ring 141, the rotating shaft 12 abuts the second inner ring 142, the first electrode 151 is connected to the first locking member 155 through a first wire 153, the first The locking member 155 contacts the first outer ring 131 through an elastic member 157 such as a spring, and the second electrode 152 is connected to the second locking member 156 fixed to the fixing ring 16 through a second wire 154.

Furthermore, the insulating component 134 includes an outer insulating member 134a adjacent to the first outer ring 131, and an inner insulating member 134b adjacent to the first inner ring 132, through the outer insulating member 134a and the inner insulating member The arrangement of 134b can avoid the short circuit caused by the contact between the first bearing 13 and the fixing ring 16.

On the other hand, the body 21 of the ultrasonic blade handle 2 is provided with at least one connecting portion 211 (shown in FIG. 2 ), and the blade handle wire 24 is connected to an electrode contact 212 embedded in each connecting portion 211 in the axial direction; Moreover, the power supply spindle 1 includes an electrode contact 158 corresponding to the position of each electrode contact 212, and each electrode contact 158 is axially provided on the insulating base 17 and connected to the first inner ring of the first bearing 13 132. When the body 21 of the ultrasonic blade is inserted into the rotating shaft 12 to bring the connecting portion 211 into contact with the insulating base 17, the first electrode 151, for example, the positive electrode passes through the first bearing 13, the electrode is connected At point 158, the electrode contact 212 and the blade wire 24 are electrically connected to the anode 22 of the blade. The second electrode 152, for example, a negative electrode, is electrically connected to the blade negative electrode 23 through the housing 11, the second bearing 14, the rotating shaft 12, and the body 21.

Therefore, when the body 21 is inserted into the rotating shaft 12, the body 21 will abut against the rotating shaft 12, and the blade electrically connects the wire 24 through the electrode contact 212 of the at least one connecting portion 211 to the corresponding The electrode contact 158 is connected to the first inner ring 132 of the first bearing 13 through the electrode contact 158. In other words, current can flow into the first electrode 151 of the electrical connector 15 from an external power source and sequentially pass through the first wire 153, the first locking member 155, the elastic member 157, the first outer ring 131, the A plurality of first balls 133, the first inner ring 132, the electrode contact 158, the electrode contact 212 and the tool wire 24 to the tool bar positive electrode 22, and then the tool bar negative electrode 23 sequentially passes through the amplitude rod 28, The body 21, the rotating shaft 12, the second outer ring 141, the plurality of second balls 143, the second inner ring 142, the waterproof assembly 161, the fixing ring 16, the second locking member 156 and the first The two wires 154 flow back to the second electrode 152.

Therefore, the power supply spindle 1 of the tool holder can generate an electrical connection circuit through the body 21 of the ultrasonic tool holder 2 to provide a stable power supply to the ultrasonic tool holder 2. In addition, since the insulating outer ring 171 is disposed between the fixing ring 16 and the first locking member 155, the elastic member 157 and the first outer ring 131, the insulating seat 17 is disposed on the first Between the inner ring 132 and the rotating shaft 12, the adverse effect of short circuit and power failure between the positive circuit and the negative circuit can be prevented.

It is worth mentioning that, in this embodiment, the body 21 includes a limiting portion 213, the limiting portion 213 has at least one notch 214, and the insulating seat 17 includes at least one limiting member 172, each of which The stopper 172 corresponds to each of the notches 214. When the body 21 is inserted into the rotating shaft 12, each of the limiting members 172 is fitted into the corresponding each of the notches 214, so that it is possible to prevent the ultrasonic tool holder 2 and the power supply spindle 1 of the tool holder from engaging due to phase deviation This leads to a situation where a loop cannot be formed. In addition, the limiting design of this case is not limited to this. In other preferred embodiments, the insulating base 17 may have at least one notch, and the body 21 includes at least one corresponding limiting member, as long as it can be determined The limit design of the ultrasonic blade that can connect the 2 to the correct phase should be within the protection scope of this case.

The case disclosed in this case is one of the preferred embodiments. Any part of the changes or modifications that originated from the technical ideas of this case and are easily pushed by those who are familiar with the art will not deviate from the scope of patent rights in this case.

1: Tool holder power supply spindle

11: Shell

111: power source

111a: stator

111b: rotor

12: Rotating axis

121: Lock ring

122: spacer

13: First bearing

131: The first outer ring

132: First inner ring

133: The first ball

134: Insulation components

134a: External insulation

134b: inner insulation

14: Second bearing

141: Second outer ring

142: Second inner ring

143: The second ball

15: Electrical connector

151: First electrode

152: Second electrode

153: The first wire

154: second wire

155: The first lock firmware

156: Second lock firmware

157: Elastic piece

158: electrode contact

16: Retaining ring

17: Insulation seat

171: Insulated outer ring

172: Limit parts

2: Ultrasonic blade

21: Ontology

211: Connection

212: electrode contact

213: Limit part

214: Notch

22: Knife handle positive

23: Knife handle negative

24: Knife handle wire

25: Piezoelectric film

26: Telescopic parts

27: Joint

28: Amplitude bar

To further reveal the specific technical content of this case, please refer to the drawings first, in which: Figure 1 is a three-dimensional exploded view of the power supply spindle and ultrasonic blade of the knife handle; Figure 2 is a three-dimensional exploded view of the ultrasonic blade shown in Figure 1; Figure 3 Figure 3 is an exploded perspective view of the power supply spindle of the tool holder shown in Figure 1; Figure 4 is an axial cross-sectional view of the power supply spindle of the tool holder shown in Figure 1; and Figure 5 is an axial portion of the joint portion of the power supply spindle and the ultrasonic tool holder shown in Figure 1 Enlarge the cross-sectional view.

1: Tool holder power supply spindle

11: Shell

12: Rotating axis

15: Electrical connector

16: Retaining ring

17: Insulation seat

171: Insulated outer ring

172: Limit parts

2: Ultrasonic blade

21: Ontology

211: Connection

213: Limit part

214: Notch

28: Amplitude bar

Claims (6)

A tool holder power supply spindle, which is used for an ultrasonic tool holder, which includes a body; a tool holder positive electrode arranged inside the body; a tool holder negative electrode arranged inside the body, the tool holder negative electrode is electrically connected to The body; a handle wire connected to the positive pole of the blade; and a plurality of piezoelectric plates electrically connected to the positive pole of the blade and the negative pole of the blade; wherein the body is provided with at least one connecting portion, and the blade is connected to the axial line An electrode contact in each of the connecting parts; and the power supply spindle of the knife handle includes a housing provided with a built-in high-frequency motor for driving a rotating shaft, and the motor is provided on an inner peripheral surface of the housing Stator, and a rotor is sleeved on an outer peripheral surface of the rotating shaft, so that the rotor drives the rotation shaft to rotate; a first bearing is arranged on an insulating seat, the insulating seat is connected to the rotating shaft, and follows The rotating shaft rotates synchronously; a set of second bearings disposed between the housing and the rotating shaft, the second bearing is electrically connected to the housing and the rotating shaft; and one includes a first electrode and a second electrode Electrical connector, the first electrode is electrically connected to the first bearing and an electrode contact axially disposed in the insulating seat and corresponding to each electrode contact, and the second electrode is electrically connected to the Shell; when the body is plugged into the rotating shaft, so that the insulating base contacts each of the connecting parts, the first electrode is electrically connected to the wire through the first bearing, the electrode contact, the electrode contact and the knife The positive pole of the blade handle; and the second electrode is electrically connected to the negative pole of the blade pole through the casing, the second bearing, the rotating shaft and the body. As described in item 1 of the patent application scope, the power supply spindle of the knife handle further includes a fixing ring attached to the casing and an insulating outer ring attached to the fixing ring, the insulating outer ring is provided for the insulation seat to pass through, The insulating seat and the fixing ring sandwich the first bearing; the electrical connector is fixed on the insulating outer ring and the fixing ring through a first locking member and a second locking member, respectively. The power supply spindle for a tool holder as described in item 1 of the patent application scope, wherein the first bearing includes a first outer ring, a first inner ring and a plurality of first balls, the plurality of first balls are arranged on the first outer Between the ring and the first inner ring; the second bearing includes a second outer ring, a second inner ring and a plurality of second balls, the plurality of second balls are disposed on the second outer ring and the second Between the inner ring; wherein the outer shell abuts on the second outer ring, the rotating shaft is sleeved on the second inner ring, the first electrode is connected to the first locking member through a first wire, the first lock The firmware is connected to the first outer ring through an elastic member; and the second electrode is connected to the second locking member fixed to the fixing ring through a second wire. The power supply spindle for a knife handle as described in item 1 of the patent application scope, wherein the second bearing is installed between a locking ring locked to the rotating shaft and a spacer fixed to the rotating shaft. The power supply spindle for a knife handle according to item 1 of the patent application scope, wherein the body includes a limiting portion, the limiting portion has at least one notch, and the rotating shaft includes at least one limiting member, when the body is inserted in During the rotation of the shaft, each of the limiting members is fitted into each of the notches. The knife handle power supply spindle as described in item 1 or 2 of the patent application scope further includes an insulating component including an outer insulating member adjacent to the first outer ring, and an inner portion adjacent to the first inner ring Insulation to avoid contact between the first bearing and the fixed ring.

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