阅读说明：本技术 一种超声波主轴及其电连接结构 (ultrasonic main shaft and electric connection structure thereof ) 是由 颜炳姜 李伟秋 于 2019-08-29 设计创作，主要内容包括：本发明涉及精密加工技术领域,公开了一种超声波主轴及其电连接结构,该电连接结构包括：拉杆；电性接头,通过一弹性件与所述拉杆相连；拉钉,与所述拉钉相连,所述拉钉的后端开设有装配孔；导电接头,安装于所述装配孔内；其中,所述电性接头与所述导电接头相抵接,以使得所述电性接头与所述导电接头电连接。本发明的有益效果为：能够降低制造难度及装配难度,并可减少导电结构在装配超声波刀柄以及在运行过程中的磨耗及折损,保证超声波电源与超声波刀柄之间电信号传输的稳定可靠性。(The invention relates to the technical field of precision machining, and discloses an ultrasonic main shaft and an electric connection structure thereof, wherein the electric connection structure comprises: a pull rod; the electric joint is connected with the pull rod through an elastic piece; the blind rivet is connected with the blind rivet, and the rear end of the blind rivet is provided with an assembling hole; the conductive connector is arranged in the assembling hole; the electric joint is abutted against the conductive joint so that the electric joint is electrically connected with the conductive joint. The invention has the beneficial effects that: the manufacturing difficulty and the assembly difficulty can be reduced, the abrasion and the breakage of the conductive structure in the process of assembling the ultrasonic knife handle and running can be reduced, and the stability and the reliability of electric signal transmission between the ultrasonic power supply and the ultrasonic knife handle are ensured.)

1. An electric connection structure of an ultrasonic spindle, comprising:

A pull rod;

The electric joint is connected with the pull rod through an elastic piece;

The blind rivet is connected with the blind rivet, and the rear end of the blind rivet is provided with an assembling hole;

The conductive connector is arranged in the assembling hole;

The electric joint is abutted against the conductive joint so that the electric joint is electrically connected with the conductive joint.

2. The ultrasonic spindle electrical connection structure of claim 1, wherein a rear end of the pull stud protrudes rearward from a rear end surface of the conductive contact.

3. the electrical connection structure for an ultrasonic spindle according to claim 1, wherein the electrical connector comprises an insulating base, and a first conductive member and a second conductive member connected to the insulating base and insulated from each other, wherein a front end of the first conductive member comprises a first abutting portion, and a front end of the second conductive member comprises a second abutting portion;

The conductive joint comprises an insulator, a first conductor and a second conductor which are connected with the insulator and insulated from each other, wherein the rear end of the first conductor comprises a first abutting position, and the rear end of the second conductor comprises a second abutting position;

the first abutting part abuts against the first abutting position, and the second abutting part abuts against the second abutting position.

4. the electrical connection structure for an ultrasonic spindle according to claim 3, wherein the insulating base has a receiving groove with an open front end, the first conductive member is mounted in the receiving groove, the front end of the first conductive member defines the first abutting portion, the second conductive member is disposed around the outer periphery of the insulating base, the front end of the second conductive member defines the second abutting portion, and the elastic member connects the second conductive member and the pull rod,

The insulator is provided with a first mounting groove and a second mounting groove which are both open towards the rear end, the second mounting groove is arranged around the periphery of the first mounting groove, the first conductor is arranged in the first mounting groove, the rear end of the first conductor is limited to be the first abutting position, the second conductor is arranged in the second mounting groove, and the rear end of the second conductor is limited to be the second abutting position.

5. The electrical connection structure for an ultrasonic spindle according to claim 4, wherein a front end of the first conductive member protrudes from a front end surface of the insulator base to form the first abutting portion, a front end of the second conductive member protrudes from a front end surface of the insulator base to form the second abutting portion, and an abutting groove is defined between the first abutting portion and the second abutting portion;

The part of the insulator between the first conductor and the second conductor protrudes out of the rear end faces of the first conductor and the second conductor to form a tight part;

the abutting part is inserted into the abutting groove and abutted against the insulating base.

6. the electrical connection structure for an ultrasonic spindle according to claim 5, wherein the second abutting portion is gradually brought close to the first conductive member from front to back.

7. an electrical connection structure for an ultrasonic spindle according to claim 3, wherein a groove for fitting with the first contact portion is provided in a rear end surface of the first conductor, and an inner side wall of the groove forms the first contact portion.

8. An electrical connection structure for an ultrasonic main shaft according to claim 7, wherein the recess has a tapered shape in which an outer diameter is gradually increased from front to rear.

9. the electrical connection structure for an ultrasonic spindle according to claim 7, wherein a sliding groove penetrating through an inner side wall of the groove is formed in the first conductor, and an elastic contact is provided in the sliding groove and abuts against the first abutting portion.

10. an electrical connection structure for an ultrasonic spindle according to claim 3, wherein the second contact position is a first contact surface defined on a rear end surface of the second conductor, and a front end surface of the second contact portion has a second contact surface coming into contact with the first contact surface.

11. The electrical connection structure for an ultrasonic spindle of claim 10, wherein the first abutting surface is a slope inclined gradually forward from inside to outside.

12. The electrical connection structure for an ultrasonic spindle according to claim 3, wherein the second mounting groove includes a first annular groove and a second annular groove extending outward along a front end edge of the first annular groove, and the second conductive body has a contour shape matching the second mounting groove.

13. The electrical connection structure of an ultrasonic spindle according to any one of claims 1 to 12, wherein the insulating base and the insulator are both rubber.

14. An ultrasonic spindle comprising an electrical connection structure of the ultrasonic spindle according to any one of claims 1 to 13.

Technical Field

The invention relates to the technical field of precision machining, in particular to an ultrasonic spindle and an electric connection structure thereof.

Background

At present, in order to improve cutting ability, surface roughness of a cut surface and machining accuracy, and effectively prolong the service life of a tool when machining a hard and brittle material, an ultrasonic machine tool is widely used, and ultrasonic vibration is introduced during machining.

The ultrasonic machine tool generally comprises an ultrasonic power supply and an ultrasonic main shaft, wherein the ultrasonic main shaft comprises a cylinder seat, a rotating shaft and an ultrasonic knife handle, a sleeve hole is formed in the rotating shaft, the ultrasonic knife handle is assembled in the sleeve hole, and the ultrasonic knife handle is required to be electrically connected with the ultrasonic power supply in the operation process. In the prior art, an electrical connector and a conductive connector are respectively and correspondingly disposed on a rotating shaft and an ultrasonic knife handle, the electrical connector includes a first conductive member and a second conductive member which are insulated from each other, the conductive connector includes a first conductive body and a second conductive body which are insulated from each other, the second conductive member is disposed around the first conductive member and includes a sleeving part thereon, when the ultrasonic knife is matched to be conductive, the second conductive member is sleeved on the outer side of the second conductive body to realize electrical connection, and then the first conductive member is connected with the first conductive body in a butting manner.

however, the electrical connection structure of the ultrasonic machine tool has the following disadvantages:

1. The second conductive piece is connected with the second conductive body in a sleeved mode, and the cutter can vibrate in the operation process, so that the requirements on the manufacturing precision of the second conductive piece and the second conductive body are extremely high, and the unstable electric connection in the operation process is prevented;

2. The electric connection is realized in a matching and sleeving manner, when the ultrasonic knife handle is assembled, the second conductive piece and the second conductive body need to be aligned, the assembly difficulty is high, and in the operation process, if vibration occurs, radial relative offset occurs between the electric joint and the conductive joint, the second conductive piece and the second conductive body are easily abraded or broken;

In conclusion, the electric connection of the existing ultrasonic machine tool has extremely high requirements on manufacturing precision and assembly, the assembly effect directly influences the stability and reliability of the electric conduction between the ultrasonic power supply and the ultrasonic tool handle, the conductive structure is easy to wear and break in the assembly and operation processes, and the service life is limited.

disclosure of Invention

the purpose of the invention is: the ultrasonic spindle and the electric connection structure thereof can reduce the manufacturing difficulty and the assembly difficulty, ensure that the electric signal generated by the ultrasonic power supply is reliably and stably transmitted to the ultrasonic knife handle, reduce the abrasion to the electric conduction structure and prolong the service life.

In order to achieve the above object, a first aspect of the present invention provides an electrical connection structure of an ultrasonic spindle, including:

A pull rod;

The electric joint is connected with the pull rod through an elastic piece;

The blind rivet is connected with the blind rivet, and the rear end of the blind rivet is provided with an assembling hole;

the conductive connector is arranged in the assembling hole;

the electric joint is abutted against the conductive joint so that the electric joint is electrically connected with the conductive joint.

Preferably, the rear end of the blind rivet protrudes rearward from the rear end surface of the conductive contact.

preferably, the electrical connector includes an insulating base, and a first conductive member and a second conductive member that are connected to the insulating base and insulated from each other, the front end of the first conductive member includes a first abutting portion, and the front end of the second conductive member includes a second abutting portion;

The conductive joint comprises an insulator, a first conductor and a second conductor which are connected with the insulator and insulated from each other, wherein the rear end of the first conductor comprises a first abutting position, and the rear end of the second conductor comprises a second abutting position;

The first abutting part abuts against the first abutting position, and the second abutting part abuts against the second abutting position.

Preferably, the insulating base is provided with a receiving groove with an opening at the front end, the first conductive member is installed in the receiving groove, the front end of the first conductive member is defined as the first abutting portion, the second conductive member is arranged around the periphery of the insulating base, the front end of the second conductive member is defined as the second abutting portion, the elastic member connects the second conductive member and the pull rod,

The insulator is provided with a first mounting groove and a second mounting groove which are both open towards the rear end, the second mounting groove is arranged around the periphery of the first mounting groove, the first conductor is arranged in the first mounting groove, the rear end of the first conductor is limited to be the first abutting position, the second conductor is arranged in the second mounting groove, and the rear end of the second conductor is limited to be the second abutting position.

preferably, the front end of the first conductive piece protrudes out of the front end surface of the insulating seat to form the first abutting portion, the front end of the second conductive piece protrudes out of the front end surface of the insulating seat to form the second abutting portion, and an abutting groove is defined between the first abutting portion and the second abutting portion;

The part of the insulator between the first conductor and the second conductor protrudes out of the rear end faces of the first conductor and the second conductor to form a tight part;

the abutting part is inserted into the abutting groove and abutted against the insulating base.

Preferably, the second abutting portion gradually approaches the first conductive member from front to back.

Preferably, a groove that fits the first abutting portion is provided on a rear end surface of the first conductor, and an inner side wall of the groove forms the first abutting portion.

Preferably, the groove is tapered such that the outer diameter increases gradually from front to back.

Preferably, a sliding groove penetrating through the inner side wall of the groove is formed in the first conductor, an elastic contact is arranged in the sliding groove, and the elastic contact abuts against the first abutting portion.

preferably, the second contact position is a first contact surface defined on a rear end surface of the second conductor, and a front end surface of the second contact portion has a second contact surface that is in contact with the first contact surface.

Preferably, the first abutting surface is a slope inclined gradually forward from the inside to the outside.

Preferably, the second mounting groove includes a first annular groove and a second annular groove extending outward along a front end edge of the first annular groove, and the second conductive body has a contour shape matching the second mounting groove.

Preferably, the insulating base and the insulator are both made of rubber.

In a second aspect of the invention, there is provided an ultrasonic spindle including an electrical connection structure as defined in any one of the first aspect.

Compared with the prior art, the ultrasonic main shaft and the electric connection structure thereof have the advantages that:

The electric joint electrically connected with the wireless receiving component is arranged on the pull rod, the conductive joint electrically connected with the vibrator is arranged on the pull nail of the ultrasonic knife handle, when the ultrasonic knife handle is assembled in the rotating shaft, the electric connection and the conductive joint can be electrically conducted only in a butt joint mode, so that signals are further transmitted to the vibrator from the wireless receiving component, the manufacturing difficulty and the assembling difficulty can be reduced, the radial offset generated by the conductive joint and the electric joint during operation can not cause any abrasion and damage to the conductive structure, and the service life can be effectively prolonged; moreover, the electric joint is connected with the pull rod through an elastic piece, axial vibration can be buffered due to the elastic action of the elastic piece, abrasion of the conductive structure caused by axial deviation is reduced, the electric joint can be kept to be elastically abutted against the conductive joint constantly in the running process, and the reliability and the stability of electric conduction are guaranteed.

drawings

FIG. 1 is a schematic structural diagram of an ultrasonic spindle according to an embodiment of the present invention;

FIG. 2 is a partially enlarged view of the electrical connection structure of FIG. 1;

FIG. 3 is a partial schematic view of portion B of FIG. 1;

FIG. 4 is a schematic structural view of an ultrasonic spindle according to an embodiment of the present invention after an ultrasonic tool holder is detached;

FIG. 5 is a schematic structural diagram of an ultrasonic scalpel handle according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a conductive structure according to an embodiment of the present invention;

FIG. 7 is a partial schematic view of portion A of FIG. 6;

FIG. 8 is a partial schematic view of an embodiment of the invention with the electrical contact and the conductive contact separated.

In the figure, 1, a cylinder seat; 11. a containing groove; 2. a wireless transmitting component; 3. a rotating shaft; 31. trepanning; 32. a cavity; 33. a tool withdrawal groove; 34. a front section of the rotating shaft; 35. a rear section of the rotating shaft; 4. a wireless receiving component; 5. a pull rod; 51. a jaw seat; 52. a mounting cavity; 53. a limiting structure; 54. a butting table; 6. a clamping jaw; 7. an electrical connector; 71. an insulating base; 711. accommodating grooves; 72. a first conductive member; 721. a first abutting portion; 73. a second conductive member; 731. a second abutting portion; 7311. A second abutting surface; 74. a butt joint groove; 75. a convex ring; 8. an elastic member; 9. a bearing;

100. an ultrasonic knife handle; 10. a knife handle body; 101. an accommodating cavity; 102. mounting holes; 20. Pulling nails; 201. a wire passing groove; 202. an assembly hole; 30. an amplitude transformer; 301. a tapered hole; 40. A vibrator; 50. a conductive joint; 501. an insulator; 5011. a first mounting groove; 5012. a second mounting groove; 5012a, a first annular groove; 5012b, a second annular groove; 5013. a tightening part; 502. a first electrical conductor; 5021. a first abutting position; 5022. a chute; 5023. a groove; 503. A second electrical conductor; 5031. a second abutment position; 5032. a first abutting surface; 504. an elastic contact; 60. a collet; 70. a sealing nut; 80. a cutter;

200. a conductive structure; 300. and (4) conducting wires.

Detailed Description

the following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

the terms "first", "second", and the like are used herein to describe various information, but the information should not be limited to these terms, which are used only to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

In the present invention, the terms "mounting," "connecting," "fixing," and the like are used in a broad sense, for example, "connecting" may be a fixed connection, a detachable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The terms described above or specific meanings in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In addition, in the description of the present invention, the terms "front end" and "rear end" mean that, when the ultrasonic machine tool is used for machining, the end close to the workpiece is the "front end" and the end away from the workpiece is the "rear end".

As shown in fig. 1-8, an embodiment of the first aspect of the present invention provides an ultrasonic spindle, which includes a cylinder base 1, a rotating shaft 3, a pull rod 5, an electrical connector 7, and an ultrasonic tool shank 100.

A wireless transmitting component 2 is arranged in the cylinder seat 1; the rotating shaft 3 is rotatably arranged in the cylinder base 1, the rotating shaft 3 is provided with a wireless receiving assembly 4 matched with the wireless transmitting assembly 2, the front end of the rotating shaft 3 is provided with a trepan boring 31, and the rear end of the rotating shaft 3 is provided with a cavity 32 communicated with the trepan boring 31; the pull rod 5 is arranged in the cavity 32, and the front end of the pull rod 5 is provided with a clamping jaw seat 51; a jaw 6 mounted on the jaw base 51; the electrical connector 7 is connected to the pull rod 5 through an elastic member 8, and a wire 400 is connected between the electrical connector 7 and the wireless receiving component 4.

The ultrasonic scalpel handle 100 includes: the screwdriver handle comprises a screwdriver handle body 10, a pull nail 20, an amplitude transformer 30 and a vibrator 40, wherein the screwdriver handle body 10 is assembled in a sleeve hole 31, the pull nail 20 is installed at the rear end of the screwdriver handle body 10, an assembling hole 202 is formed in the rear end of the pull nail, the screwdriver handle body 10 is connected with a clamping jaw 6 through the pull nail 20 and rotates along with the rotation of a rotating shaft 3, an accommodating cavity 101 is formed in the front end of the screwdriver handle body 10, the rear end of the amplitude transformer 30 is arranged in the accommodating cavity 101, and the vibrator 40 is installed at the rear end of the amplitude transformer 30; and a conductive connector 50 mounted in the mounting hole 202, and a lead wire 400 is connected between the conductive connector 50 and the vibrator 40.

in this embodiment, the conductive structure 200 of the ultrasonic spindle includes a conductive contact 50 and an electrical contact 7, and the conductive contact 50 abuts against the electrical contact 7, so that the electrical contact 7 is electrically connected to the conductive contact 50. In addition, in this embodiment, the electrical connection structure of the ultrasonic spindle includes a conductive structure 200, a pull rod 5 and an elastic member 8.

based on the above technical solution, in this embodiment, the wireless transmitting component 2 and the wireless receiving component 4 which are adapted to each other are disposed on the cylinder base 1 and the rotating shaft 3, and the ultrasonic electrical signal of the ultrasonic power supply can be stably transmitted to the rotating shaft 3 in a non-contact manner, so as to ensure stable transmission of the electrical signal during the rotation of the rotating shaft 3; in addition, the rotating shaft 3 and the ultrasonic knife handle 100 are respectively provided with the adaptive electric joint 7 and the conductive joint 50, the electric joint 7 is electrically connected with the wireless receiving component 4 through the conducting wire 400, the conductive joint 50 is electrically connected with the vibrator 40, when the ultrasonic knife handle 100 is assembled on the rotating shaft 3, the electric connection between the electric joint 7 and the conductive joint 50 is realized in a butting mode, and as a sleeving part is not needed, the abrasion and the breakage of the conductive structure 200 in the assembling and running processes can be prevented, the service life is effectively prolonged, and the manufacturing difficulty and the assembling difficulty can be reduced; furthermore, the electrical connector 7 is connected with the pull rod 5 through an elastic member 8, after the ultrasonic knife handle 100 is assembled on the rotating shaft, the elastic member 8 is in a compressed state, the conductive connector 50 and the electrical connector 7 are electrically connected in an elastic abutting mode, and in the operation process of the cutter, due to the elastic action of the elastic member 8, the electrical connector 7 and the conductive connector 50 can be kept in abutting contact constantly, so that the reliability and the stability of electrical connection are ensured.

Alternatively, in this embodiment, the conductive contact 50 may also be connected to the blind rivet 20 by a resilient member 8.

Preferably, in this embodiment, the rear end of the blind rivet 20 protrudes rearward beyond the rear end surface of the conductive connector 50, specifically referring to fig. 3, the rear end of the blind rivet 20 is disposed around the conductive connector 50, so that the conductive connector 50 can be protected during transportation to prevent collision and damage, and in the operation process, the position where the conductive connector 50 and the sexual connector 7 are abutted in a matching manner can be protected, so that dust and water are prevented, and the stability of electrical connection of the conductive structure 200 is ensured.

In an embodiment of the present invention, as shown in fig. 6, 7 and 8, preferably, the electrical connector 7 includes an insulating base 71, and a first conductive member 72 and a second conductive member 73 connected to the insulating base 71 and insulated from each other, a front end of the first conductive member 72 includes a first abutting portion 721, a front end of the second conductive member 73 includes a second abutting portion 731, and the first conductive member 72 and the second conductive member 73 are electrically connected to the wireless receiving component 4 through a conducting wire 400 respectively; correspondingly, the conductive connector 50 needs to be adapted to the electrical connector 7, the conductive connector 50 includes an insulator 501, and a first conductor 502 and a second conductor 503 connected to the insulator 501 and insulated from each other, a rear end of the first conductor 502 includes a first abutting portion 5021, a rear end of the second conductor 503 includes a second abutting portion 5031, and the first conductor 502 and the second conductor 503 are electrically connected to the vibrator 40 through a wire 400 respectively.

specifically, in this embodiment, the first abutting portion 721 abuts against the first abutting portion 5021, the second abutting portion 731 abuts against the second abutting portion 5031, the first conductive member 72 and the first conductive member 502, and the second conductive member 73 and the second conductive member 503 are all electrically connected in an abutting manner, and the elastic action of the elastic member 8 is combined to ensure the stability of the electrical connection between the electrical connector 7 and the electrical connector 50.

Specifically, in the embodiment, with reference to fig. 6, 7 and 8, the insulating base 71 is provided with an accommodating groove 711 with an open front end, the first conductive member 72 is embedded in the accommodating groove 711, the front end of the first conductive member 72 is exposed outside the insulating base 71 to define a first abutting portion 721, the second conductive member 73 is disposed around the outer periphery of the insulating base 71, the front end of the second conductive member 73 defines a second abutting portion 731, and the elastic member 8 connects the second conductive member 73 and the pull rod 5.

As shown in fig. 6, in the conductive contact 50 of the present embodiment, the insulator 501 is provided with a first mounting groove 5011 and a second mounting groove 5012 both opened toward the rear end, the second mounting groove 5012 is provided around the outer periphery of the first mounting groove 5011, the first conductor 502 is embedded in the first mounting groove 5011, the rear end of the first conductor 502 is exposed to the outside of the insulator 501 to define a first contact position 5021, the second conductor 503 is embedded in the second mounting groove 5012, and the rear end of the second conductor 503 is exposed to the outside of the insulator 501 to define a second contact position 5031.

In this embodiment, in order to facilitate the connection of the first conductive member 72 to the conductive wire 400 and the wireless receiving assembly 4, the receiving groove 711 penetrates through the front end and the rear end of the insulating base 71, i.e., the rear end of the first conductive member 72 is also exposed outside the insulating base 71.

illustratively, the second mounting groove 5012 includes a first annular groove 5012a and a second annular groove 5012b formed by extending outward along a front end edge of the first annular groove 5012a, and the second conductive body 503 has a contour shape matching the second mounting groove 5012 and is embedded therein.

In one embodiment of the present invention, the front end of the first conductive member 72 protrudes from the front end surface of the insulating base 71 to form a first abutting portion 721, the front end of the second conductive member 73 protrudes from the front end surface of the insulating base 71 to form a second abutting portion 731, and an abutting groove 74 is defined between the first abutting portion 721 and the second abutting portion 731;

Correspondingly, the portion of the insulator 501 between the first conductor 502 and the second conductor 503 protrudes from the rear end surfaces of the first conductor 502 and the second conductor 503 to form a butting portion 5013.

As shown in fig. 7, when the electrical connector 7 abuts against the conductive connector 50, the abutting portion 5013 is inserted into the abutting groove 74 to abut against the insulating base 71, and the abutting portion 5013 and the insulating base 71 are elastically deformed, so that a sealing structure can be formed to separate and seal the first conductive member 72 and the first conductive member 502, which can effectively prevent water and dust, and ensure stable and reliable electrical connection.

in this embodiment, the second abutting portion 731 is gradually close to the first conductive member 72 from front to back, that is, the second abutting portion 731 is in a flaring shape, and has an inner diameter gradually increasing from back to front, so as to ensure a certain elastic deformation space, and further ensure a sealing effect.

In a preferred embodiment of the present invention, in order to ensure effective contact between the first conductive member 72 and the first conductive body 502, the rear end surface of the first conductive body 502 is provided with a groove 5023 matched with the first contact portion 721, and the inner sidewall of the groove 5023 forms a first contact position 5021; illustratively, the groove 5023 is tapered with an increasing outer diameter from front to back, and the first abutment 721 is a matching taper.

As an alternative to this, the recess 5023 may also be provided in other shapes, such as a square or other polygonal shape.

in this embodiment, in order to prevent a gap from being formed between the first abutting portion 721 and the inner side wall of the groove 5023, so as to avoid unstable electrical conduction, a sliding groove 5022 penetrating through the inner side wall of the groove 5023 is formed inside the first electrical conductor 502, an elastic contact 504 is disposed in the sliding groove 5022, the elastic contact 504 is elastically connected with the first electrical conductor 502, when the electrical connector 7 is electrically connected with the electrical connector 50, the elastic contact 504 abuts against the first electrical conductor 72, and it can be ensured that the first electrical conductor 72 and the first electrical conductor 502 are kept in contact during the operation of the tool, which is specifically shown in fig. 7.

Similarly, in order to ensure that the second conductive member 73 and the second conductive member 503 are electrically connected stably, the second abutting portion 5031 is a first abutting surface 5032 defined on the rear end surface of the second conductive member 503, the front end surface of the second abutting portion 731 is defined with a second abutting surface 7311 engaged with the first abutting surface 5032, and the first abutting surface 5032 is an inclined surface inclined gradually forward from inside to outside; as a whole, the first abutment surface 5032 is a tapered surface having an outer diameter gradually decreasing from front to back, and the tapered surface can play a certain guiding role in the engagement and abutment, thereby ensuring the reliability of the abutment. For example, the first abutment surface 5032 may also be an arc surface.

In a preferred embodiment of the present invention, the pull rod 5 is provided with a mounting cavity 52 penetrating through the front and rear ends thereof, and the electrical connector 7 is arranged at the front end of the mounting cavity 52; one end of the wire 400 connected to the electrical connector 7 is connected to the rear end of the electrical connector 7, and passes through the mounting cavity 52, and the other end is connected to the wireless receiving component 4, as shown in fig. 1.

further, in order to facilitate the installation of the elastic member 8, the limiting structure 53 and the abutting table 54 are sequentially arranged from front to back along the inner side wall of the installation cavity 52, the outer periphery of the electrical connector 7 is provided with a convex ring 75, the front end surface of the convex ring 75 is in fit abutting contact with the rear end surface of the limiting structure 53, one end of the elastic member 8 abuts against the rear end surface of the convex ring 75, and the other end of the elastic member 8 abuts against the front end surface of the abutting table 54, as shown in fig. 2.

exemplarily, in a preferred embodiment, the elastic member 8 is a spring, and the spring is sleeved on the outer periphery of the electrical connector 7; a plurality of elastic members 8 may also be provided at intervals along the outer circumference of the electrical connector 7.

In a preferred embodiment of the present invention, a mounting hole 102 communicated with the accommodating cavity 101 is formed at the rear end of the tool holder body 10, the blind rivet 20 is mounted in the mounting hole 102, and a wire passing groove 201 communicated with the assembling hole 202 is formed at the rear end of the blind rivet 20; one end of the wire 400 connected to the conductive connector 50 is connected to the front end of the conductive connector 50, and after passing through the wire passing groove 201, the mounting hole 102 and the accommodating cavity 101 in sequence, the other end is connected to the vibrator 40.

as shown in fig. 1, in the present embodiment, a tool withdrawal groove 33 is formed at a position inside the rotating shaft 3, where the cavity 32 is connected to the trepan boring 31; before the ultrasonic knife handle 100 needs to be assembled, the knife striking mechanism pushes the pull rod 5 to enable the clamping jaw 6 to move into the knife withdrawing groove 33, the clamping jaw 6 is opened, when the ultrasonic knife handle 100 is assembled to the trepanning 31, the knife striking mechanism pulls the pull rod 5 to withdraw, so that the clamping jaw 6 clamps the blind rivet 20, and the ultrasonic knife handle 100 is assembled into the rotating shaft 3 and can rotate along with the rotation of the rotating shaft 3.

In order to ensure the assembling accuracy, in the present embodiment, the trepanning 31 is tapered such that the inner diameter becomes gradually smaller from the front to the rear.

in this embodiment, the horn 30 is provided with a tapered hole 301 at the front end thereof, the inner diameter of the tapered hole 301 gradually decreases from front to back, the collet 60 is mounted in the tapered hole 301, the tool 80 is mounted in the collet 60, and a sealing nut 70 connects the collet 60 and the horn 30, so as to mount the tool 80 on the horn 30, as shown in fig. 5. As an alternative to mounting the cutting tool, the outer side surface of the front end of the horn 30 may be provided as a tapered surface, and the cutting tool may be fitted directly on the tapered surface.

In this embodiment, the insulating base 71 and the insulator 501 are both rubber members, and are capable of ensuring that elastic deformation occurs during abutment to perform effective sealing.

Illustratively, in order to ensure electrical conductivity, the first conductor 72, the second conductor 73, the first conductor 502, and the second conductor 503 are made of copper.

In this embodiment, in order to ensure that the wireless receiving component 4 and the invalid transmitting component 2 can be conveniently installed in pair to realize better wireless transmission, the rotating shaft 3 includes a front rotating shaft section 34 and a rear rotating shaft section 35 which are sequentially connected from front to back, the outer diameter of the front rotating shaft section 34 is greater than that of the rear rotating shaft section 35, so that a step is defined at the connection position of the front rotating shaft section 34 and the rear rotating shaft section 35; the wireless receiving component 4 is sleeved outside the rotating shaft rear section 35 and is abutted against the step, so that axial positioning can be performed, an annular accommodating groove 11 is formed in the barrel seat 1 relative to the wireless transmitting component 2, and the wireless transmitting component 2 is arranged in the accommodating groove 11.

Further, in this embodiment, in order to ensure stable rotation of the rotating shaft 3, at least two bearings 9 are disposed between the rotating shaft 3 and the cylinder base 1, and at least one bearing 9 is disposed at each of the front end and the rear end of the rotating shaft 3.

The embodiment of the second aspect of the present invention further provides an ultrasonic machine tool, which includes an ultrasonic power supply and the ultrasonic spindle according to any embodiment of the first aspect, wherein the wireless transmitting assembly 2 is electrically connected to the ultrasonic power supply by a wire, and the specific structure is not shown in the drawings.

The ultrasonic machine tool in this embodiment includes the ultrasonic spindle as in the first embodiment, and therefore, has all the beneficial effects of the ultrasonic spindle, and will not be described herein again.

To sum up, the embodiment of the invention provides an ultrasonic spindle and an ultrasonic machine tool comprising the same, wherein a wireless transmitting component and a wireless receiving component are respectively arranged on a cylinder seat and a rotating shaft, the wireless transmitting component is electrically connected with an ultrasonic power supply, an ultrasonic electrical signal is transmitted to the rotating shaft in a non-contact mode, an electrical connector electrically connected with the wireless receiving component is respectively arranged on a pull rod, a conductive connector electrically connected with a vibrator is arranged on a pull nail of an ultrasonic knife handle, when the ultrasonic knife handle is assembled in the rotating shaft, the electrical connection and the conductive connector can be electrically conducted only in a butting mode, so that signals are further transmitted to the vibrator from the wireless receiving component, the manufacturing difficulty and the assembly difficulty can be reduced, and radial deviation generated by the conductive connector and the electrical connector during operation can not cause any abrasion and breakage on a conductive structure, the service life can be effectively prolonged; moreover, the electric joint is connected with the pull rod through an elastic piece, axial vibration can be buffered due to the elastic action of the elastic piece, abrasion of the conductive structure caused by axial deviation is reduced, the electric joint can be kept to be elastically abutted against the conductive joint constantly in the running process, and the reliability and the stability of electric conduction are guaranteed.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.