Energy transmission apparatus, spindle, ultrasonic machining equipment and machine tool

Abstract

Provided are an energy transmission apparatus, a spindle, ultrasonic machining equipment and a machine tool. The energy transmission apparatus is mounted on a spindle, and comprises a wireless transmitting unit (200) and a wired transmitting unit (300), wherein the wireless transmitting unit (200) is configured to form wireless electrical transmission with a wireless receiving unit (420); and the wired transmitting unit (300) is configured to form wired electrical transmission with a wired receiving unit (410). Therefore, wired and wireless integrated electrical transmission is achieved without affecting an existing structure. The energy transmission apparatus can be mounted on the spindle, and different ultrasonic tool holders (400) can be selected on the basis of machining methods, such that the same spindle can be fitted with an ultrasonic tool holder (400) having the wireless receiving unit (420) and an ultrasonic tool holder (400) having the wired receiving unit (410).

Description

Energy transmission device, main shaft, ultrasonic machining device and machine tool TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic machining, in particular to an energy transmission device, a main shaft, an ultrasonic machining device and a machine tool. BACKGROUND

[0002] An ultrasonic tool holder is installed at the front end of the main shaft, and a transducer is arranged in the ultrasonic tool holder to convert electrical energy into mechanical vibration, so as to perform ultrasonic machining on a workpiece. During the machining process, an electrical signal needs to be transmitted to the ultrasonic tool holder rotating with the main shaft. Common electrical signal transmission methods include wired transmission and wireless transmission. The conductive ring direct connection structure is used as wired transmission, and a power supply end structure needs to be installed on the main shaft side, such as a transmitting seat (contacting and electrically connecting with the power side in the receiving seat on the tool holder side). The wired transmission is suitable for low-speed working conditions. The wireless transmission formed by the wireless transmitting unit at the end of the main shaft and the wireless receiving unit at the end of the ultrasonic tool holder is suitable for high-speed working conditions. That is, the wired transmission and the wireless transmission structure need to be applied to different main shaft structures. However, the ultrasonic main shaft with wired transmission has a speed limit. When the speed of the ultrasonic main shaft with wired transmission is too high, the conductive ring will generate serious heat, affecting the electrical transmission. The power of the ultrasonic machining suitable for wireless transmission is limited, and it cannot be used for high-power ultrasonic machining. Therefore, when the ultrasonic tool holder with two transmission methods needs to be used in workpiece machining, the number of machining machines needs to be increased, and the cost is high. SUMMARY

[0003] The present application provides an energy transmission device, a main shaft, an ultrasonic machining device and a machine tool, so that the same main shaft and machine tool can be used with ultrasonic tool holders with two transmission methods.

[0004] The present application provides an energy transmission device, a main shaft, an ultrasonic machining device and a machine tool, so that the same main shaft and machine tool can be used with ultrasonic tool holders with two transmission methods.

[0005] In some embodiments, the front end of the wired transmitting unit extends forward of the wireless transmitting unit, the length of the wireless transmitting unit in the axial direction of the main shaft is the height of the wireless transmitting unit, the distance between the front end surface of the wired transmitting unit and the plane where the frontmost end of the wireless transmitting unit is located along the axial direction of the main shaft is the height of the wired transmitting unit, and the height of the wired transmitting unit is greater than or equal to 3 times the height of the wireless transmitting unit.

[0006] In some embodiments, the height of the wired transmitting unit is less than or equal to 50 times the height of the wireless transmitting unit.

[0007] In some embodiments, the energy transmission device further comprises a mounting seat located at the front end of the spindle; the mounting seat is mounted with the wireless transmission unit and the wired transmission unit.

[0008] The second aspect of the present application further provides a spindle comprising the energy transmission device as described above.

[0009] In some embodiments, the spindle further comprises a mounting seat; the mounting seat comprises a spindle housing and a front end cover located at the front end of the spindle housing, wherein the wireless transmission unit is mounted on the front end cover, and the wired transmission unit is mounted on the front end cover or the spindle housing.

[0010] In some embodiments, the wired transmission unit is mounted on the front end cover of the spindle, the front end cover is provided with connecting wires, the connecting wires are respectively electrically connected with the wired transmission unit and the wireless transmission unit, and the connecting wires have lead ends extending to the outside of the front end cover.

[0011] In some embodiments, the front end face or the inner side wall of the front end cover is provided with a mounting groove around its own central axis, and the wireless transmission unit is arranged in the mounting groove.

[0012] Alternatively, the inner edge of the front end face of the front end cover is recessed to form a step arranged around its own central axis, the wireless transmission unit is arranged in the step, and the inner side face of the wireless transmission unit is arranged outwardly from back to front.

[0013] In some embodiments, the central angle of the mounting groove or the step is θ, wherein π / 4≤θ≤2π.

[0014] In some embodiments, the wired transmission unit is mounted on the front end cover of the spindle, and the front end cover is further provided with a mounting position for mounting the wired transmission unit.

[0015] In some embodiments, the mounting position is a limiting groove provided on the front end face of the front end cover.

[0016] The third aspect of the present application provides an ultrasonic machining device comprising the spindle and the ultrasonic tool holder as described above; the ultrasonic tool holder is mounted on the spindle, and the ultrasonic tool holder is provided with the wireless receiving unit and / or the wired receiving unit.

[0017] In some embodiments, the ultrasonic tool holder is an ultrasonic cutting tool holder, an ultrasonic turning tool holder or an ultrasonic milling tool holder.

[0018] The fourth aspect of the present application provides a machine tool, which comprises the ultrasonic machining device, the ultrasonic wave generator and the logic judgment module as described above; the ultrasonic wave generator is electrically connected with the wireless transmitting unit and the wired transmitting unit; and the logic judgment module is signal connected with the ultrasonic wave generator.

[0019] The energy transmission device, the main shaft, the ultrasonic machining device and the machine tool provided by the present application have the beneficial effects that: the energy transmission device comprises the wired transmitting unit and the wireless transmitting unit, realizes the integrated electric transmission of wired and wireless, does not affect the existing structure, and can be installed on the main shaft; the main shaft can select different ultrasonic tool shanks according to the machining method, so that the same main shaft can be assembled with the ultrasonic tool shank with the wireless receiving unit or the ultrasonic tool shank with the wired receiving unit, or can be assembled with the ultrasonic tool shank with two receiving modes, so as to form the electric transmission with the wireless transmitting unit and the wired transmitting unit on the main shaft, so that the main shaft can machine the workpiece, and therefore the main shaft is suitable for high-speed working conditions and high-power machining, and does not have the problem of serious heating of the conductive ring. When applied to the machine tool, the same machine tool can meet the demand of ultrasonic machining of parts by using ultrasonic tool shanks with two different transmission modes, and the equipment cost is saved.

[0020] Additional aspects and advantages of the present application will be described in part below with reference to the description, will become apparent from the description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a structure schematic diagram of the wired transmitting unit of the main shaft of the embodiment of the present application and the wired receiving unit of the ultrasonic tool shank after connection;

[0022] Fig. 2 is a structure schematic diagram of the front end cover, the wireless transmitting unit and the wired transmitting unit of the embodiment of the present application;

[0023] Fig. 3 is a structure schematic diagram of the front end cover of the embodiment of the present application;

[0024] Fig. 4 is a sectional structure schematic diagram of Fig. 2;

[0025] Fig. 5 is a structure schematic diagram of the state of the main shaft of the embodiment of the present application when assembled with the ultrasonic tool shank with the wireless receiving unit;

[0026] Fig. 6 is a structure schematic diagram of the wireless transmitting unit arranged on the inner side wall of the front end cover of the embodiment of the present application;

[0027] Fig. 7 is a structure schematic diagram of the wireless transmitting unit arranged on the step of the front end cover of the embodiment of the present application;

[0028] Fig. 8 is a structure schematic diagram of the front end cover of another embodiment of the present application.

[0029] In the figure, 100, mounting seat; 120, main shaft housing; 130, front end cover; 131, mounting groove; 132, step; 133, limiting groove; 134, mounting position; 140, connecting wire; 141, lead end; 200, wireless transmitting unit; 300, wired transmitting unit; 400, ultrasonic knife handle; 410, wired receiving unit; 420, wireless receiving unit. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0031] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the purpose of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0032] In the description of the present application, several meanings are one or more, and the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0033] In the description of the present application, unless otherwise explicitly limited, the words such as setting, mounting, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0034] Please refer to FIGS. 1 to 8, the energy transmission device provided by the embodiments of the present application is described.

[0035] Referring to FIGS. 1-3, the energy transmission device in some embodiments of the present application is installed on the main shaft, including: a wireless transmission unit 200, a wired transmission unit 300; the wireless transmission unit 200 is used to form wireless electrical transmission with the wireless receiving unit 420 on the ultrasonic knife handle 400; the wired transmission unit 300 is used to form wired electrical transmission with the wired receiving unit 410 on the ultrasonic knife handle 400, that is, the energy transmission device installed on the main shaft can realize integrated electrical transmission of wired and wireless, and different ultrasonic knife handles 400 can be selected according to the processing method or demand, then the same main shaft can be equipped with the ultrasonic knife handle 400 with the wireless receiving unit 420 or the ultrasonic knife handle 400 with the wired receiving unit 410, or the ultrasonic knife handle 400 with two receiving modes (only one transmission mode is used in the processing process) can be equipped, to form electrical transmission with the wireless transmission unit 200 and the wired transmission unit 300, so as to perform ultrasonic processing on the workpiece.

[0036] In some embodiments of the present application, a mounting seat 100 is further arranged at the front end of the main shaft, and the wireless transmission unit 200 and the wired transmission unit 300 are installed on the mounting seat 100. The power is transmitted by the energy transmission device at the front end of the main shaft, and the front-rear direction of the main shaft is parallel to the axial direction of the main shaft, and the front-rear direction is shown in FIG. 1.

[0037] In some embodiments, the mounting seat 100 is used to fix the wireless transmission unit 200 and the wired transmission unit 300, the wireless transmission unit 200 on the mounting seat 100 is a wireless transmission device; the wireless receiving unit 420 is a wireless receiving device, and the wireless transmission unit 200 can form a path with the wireless receiving unit 420 through electromagnetic waves, so that the wireless transmission unit 200 can transmit electrical signals to the wireless receiving unit 420, achieving the purpose of energy transmission.

[0038] In some embodiments, the wired transmission unit 300 can be directly in contact with the wired receiving unit 410 for electrical connection, to achieve the purpose of electrical signal transmission.

[0039] In some embodiments of the present application, referring to FIG. 4, the front end of the wired transmission unit 300 extends to the front of the wireless transmission unit 200, that is, the front end of the wired transmission unit 300 is located in front of the wireless transmission unit 200, the length of the wireless transmission unit 200 in the axial direction of the main shaft is the height of the wireless transmission unit 200, as shown as H1 in FIG. 4; the distance between the front end face of the wired transmission unit 300 and the plane where the front end of the wireless transmission unit 200 is located in the axial direction of the main shaft is the height of the wired transmission unit 300, as shown as H2 in FIG. 4; the height of the wired transmission unit 300 is greater than or equal to 3 times the height of the wireless transmission unit 200. Since the wired transmission unit 300 and the wireless transmission unit 200 are both arranged at the front end of the main shaft, the corresponding ultrasonic knife handle 400 can be provided with a wireless receiving unit 420 and a wired receiving unit 410. In order to realize the contact electric transmission between the wired transmission unit 300 and the wired receiving unit, the theoretical lower limit of the height of the wired transmission unit 300 is the height of the wireless transmission unit 200, but it also needs to consider the air inlet structure attached to the handle, the structure of the power supply side connection end of the wired transmission unit 300, the structure of the power consumption side connection end, the handle body, etc. The height of the wired transmission unit 300 is greater than or equal to 3 times the height of the wireless transmission unit 200, so that the wired transmission unit 300 is connected with the wired receiving unit 410 and does not interfere with other existing structures.

[0040] On the basis of the above, in order to reduce the length of the ultrasonic knife handle 400 and make the connection between the ultrasonic knife handle 400 and the main shaft more stable, in some embodiments, the height of the wired transmission unit 300 is less than or equal to 50 times the height of the wireless transmission unit 200.

[0041] In some embodiments of the present application, the front end face or the inner side wall of the mounting seat 100 is provided with a mounting groove 131 around its own center axis, and the wireless transmission unit 200 is arranged in the mounting groove 131. For the scheme that the mounting groove 131 is arranged on the front end face or the inner side wall of the front end cover 130, the height of the wireless transmission unit 200 is the distance from the rear end face of the wireless transmission unit 200 to its front end face, and the height of the wired transmission unit 300 is the distance from the front end face of the wired transmission unit 300 to the front end face of the wireless transmission unit 200, as shown in FIG. 4.

[0042] As shown in FIG. 2, FIG. 3 and FIG. 5, in some embodiments, the wireless transmitting unit 200 is arranged in the mounting groove 131 on the front end surface of the mounting base 100, and the corresponding wireless receiving unit 420 of the ultrasonic knife handle 400 is arranged on the front side of the mounting base 100, and a gap is left between the wireless transmitting unit 200 and the wireless receiving unit 420 in the axial direction of the main shaft to avoid friction therebetween and ensure the wireless transmission efficiency.

[0043] In some embodiments, when the wireless transmitting unit 200 is arranged in the mounting groove 131 on the inner side wall of the mounting base 100, as shown in FIG. 6, the corresponding wireless receiving unit 420 of the ultrasonic knife handle 400 is arranged on the inner side of the wireless transmitting unit 200 to transmit the electric signal.

[0044] In addition, in some embodiments, the inner edge of the front end surface of the mounting base 100 is recessed to form a step 132 arranged around the central axis thereof, the wireless transmitting unit 200 is arranged in the step 132, and the inner side surface of the wireless transmitting unit 200 is arranged outwardly from back to front, as shown in FIG. 7, the corresponding wireless receiving unit 420 of the ultrasonic knife handle 400 has a corresponding tapered surface to enable the wireless transmitting unit 200 to transmit the electric signal to the wireless receiving unit 420 better.

[0045] In other embodiments, the wired transmitting unit can be directly fixed on the front end surface of the mounting base or can be sleeved on the mounting base by a clamping ring or the like.

[0046] In some embodiments, as shown in FIG. 8, in order to facilitate the installation of the wired transmitting unit 300, the mounting base 100 is further provided with a mounting position 134 for mounting the wired transmitting unit 300. That is, a mounting position for cooperating with the wired transmitting unit 300 is reserved on the mounting base 100 to enable the wired transmitting unit 300 to be mounted on the mounting base 100.

[0047] In some embodiments, as shown in FIG. 3, the mounting position 134 is a limiting groove 133 arranged on the front end surface of the mounting base 100. In some embodiments, the limiting groove 133 is a groove, and the wired transmitting unit 300 can be directly clamped into the limiting groove 133 to realize the positioning of the wired transmitting unit 300 and facilitate the installation of the wired transmitting unit 300 on the mounting base 100. Of course, in addition thereto, a limiting structure can be additionally arranged on the mounting base to facilitate the installation of the wired transmitting unit 300, for example, a positioning protrusion is arranged around the mounting position, and the corresponding wired transmitting unit 300 can be provided with a positioning recess groove to cooperate with the positioning protrusion to realize the positioning assembly.

[0048] The application also provides a spindle. Referring to FIGS. 1-5, the spindle comprises the energy transmission device described above, the energy transmission device is installed on the spindle, wherein the energy transmission device can realize wired and wireless integrated power transmission, the spindle can select different ultrasonic tool shanks 400 according to the machining method, then the same spindle can be assembled with the ultrasonic tool shank 400 having the wireless receiving unit 420 or the ultrasonic tool shank 400 having the wired receiving unit 410, or can be assembled with the ultrasonic tool shank 400 having two receiving modes, so as to form power transmission with the wireless transmitting unit 200 and the wired transmitting unit 300, so as to perform ultrasonic machining on the workpiece.

[0049] In some embodiments of the application, the spindle further comprises a mounting seat 100; the mounting seat 100 comprises a front end cover 130 and a spindle shell 120; the front end cover 130 is arranged at the front end of the spindle shell 120, the wireless transmitting unit 200 is arranged on the front end cover 130, and the wired transmitting unit 300 is arranged on the front end cover 130 or the spindle shell 120. In some embodiments, the wired transmitting unit 300 can be installed on the spindle shell 120 in the form of a clamp, which can be selected according to actual conditions. In some embodiments, the front end of the spindle is provided with a mounting hole matched with the rear end of the ultrasonic tool shank 400, so that the front end of the spindle is connected with the ultrasonic tool shank 400, and the wired transmitting unit 300 and the wireless transmitting unit 200 are aligned with the wired receiving unit 410 or the wireless receiving unit 420 of the corresponding ultrasonic tool shank 400. The spindle of the application is provided with the wired transmitting unit 300 and the wireless transmitting unit 200, the spindle can select different ultrasonic tool shanks 400 according to the machining method, then the same spindle can be assembled with the ultrasonic tool shank 400 having the wireless receiving unit 200 or the ultrasonic tool shank 400 having the wired receiving unit 300, or can be assembled with the ultrasonic tool shank having two receiving modes (only one transmission mode is used in the machining process), so that the spindle can machine the workpiece, when applied to a machine tool, the same machine tool can use ultrasonic tool shanks 400 with two different transmission modes to machine parts, thereby saving equipment cost.

[0050] In some embodiments of the present application, referring to FIGS. 4-5, the wired transmitting unit 300 is arranged on the front end cover 130 of the main shaft, the front end cover 130 is provided with connecting wires 140, the connecting wires 140 are electrically connected with the wired transmitting unit 300 and the wireless transmitting unit 200 respectively, and the connecting wires 140 have lead ends 141 extending to the outside of the front end cover 130. That is, the front end cover 130 integrates the wired transmitting unit 300 and the wireless transmitting unit 200, and connects the wired transmitting unit 300 and the wireless transmitting unit 200 by using the connecting wires 140, which facilitates the connection of the circuit. In some embodiments, after the lead ends 141 are led out, the lead ends 141 can be connected with an ultrasonic generator, so that the ultrasonic generator transmits electrical signals to the wired transmitting unit 300 and the wireless transmitting unit 200.

[0051] In some embodiments of the present application, the front end face or the inner side wall of the front end cover 130 is provided with a mounting groove 131 around its own central axis, and the wireless transmitting unit 200 is arranged in the mounting groove 131. For the scheme of arranging the mounting groove 131 on the front end face or the inner side wall of the front end cover 130, the height of the wireless transmitting unit 200 is the distance from the rear end face of the wireless transmitting unit 200 to the front end face thereof, and the height of the wired transmitting unit 300 is the distance from the front end face of the wired transmitting unit 300 to the front end face of the wireless transmitting unit 200, as shown in FIG. 4.

[0052] As shown in FIGS. 2, 3 and 5, in some embodiments, the wireless transmitting unit 200 is arranged in the mounting groove 131 of the front end face, and the corresponding wireless receiving unit 420 of the ultrasonic knife handle 400 is located on the front side of the front end cover 130, and along the axial direction of the main shaft, a certain gap is left between the wireless transmitting unit 200 and the wireless receiving unit 420, so as to realize wireless transmission.

[0053] In some embodiments, when the wireless transmitting unit 200 is arranged in the mounting groove 131 of the inner side wall, as shown in FIG. 6, the corresponding wireless receiving unit 420 of the ultrasonic knife handle 400 is located on the inner side of the wireless transmitting unit 200, so as to transmit electrical signals.

[0054] In addition, in some embodiments, the inner edge of the front end face of the front end cover 130 is recessed to form a step 132 arranged around its own central axis, the wireless transmitting unit 200 is arranged in the step 132, and the inner side face of the wireless transmitting unit 200 is arranged outwardly from back to front, as shown in FIG. 7, the corresponding wireless receiving unit 420 of the ultrasonic knife handle 400 has a corresponding tapered face, so that the wireless transmitting unit 200 can better transmit electrical signals to the wireless receiving unit 420.

[0055] In some embodiments of the present application, the mounting groove 131 or the step 132 has a central angle of θ, where π / 4≤θ≤2π. The angle θ corresponds to the central angle of the extension of the mounting groove 131 or the step 132 along the circumference of the ultrasonic tool holder 400. That is, the corresponding wireless transmitting unit 200 is in the shape of a circular ring or a non-integer circular ring. Referring to FIGS. 2 and 3, the mounting groove 131 is a circular ring groove, and the corresponding wireless transmitting unit 200 is also in the shape of a circular ring. In this case, θ is 2π. Referring to FIG. 8, the mounting groove 131 is a quarter circular ring, and the corresponding wireless transmitting unit 200 is also in the shape of a quarter circular ring. In this case, θ is π / 2. In addition, the shape of the corresponding wireless transmitting unit 200 can be set according to actual conditions, and the central angle θ of the corresponding mounting groove 131 or the step 132 needs to satisfy the condition of π / 4≤θ≤2π.

[0056] In some embodiments of the present application, when the wired transmitting unit 300 is mounted on the front end cover 130 of the main shaft, the front end cover 130 is further provided with a mounting position for mounting the wired transmitting unit 300. That is, the front end cover 130 is provided with a mounting position for cooperating with the wired transmitting unit 300, so that the wired transmitting unit 300 is mounted on the front end cover 130.

[0057] On the basis of the above, in some embodiments, the mounting position is a limiting groove 133 provided on the front end surface of the front end cover 130. In some embodiments, the limiting groove 133 is a groove, which allows the wired transmitting unit 300 to be directly clamped into the limiting groove 133 to achieve positioning and facilitate the installation of the wired transmitting unit 300. Of course, a limiting structure can also be additionally provided on the mounting seat to achieve the purpose of facilitating the installation of the wired transmitting unit, such as providing a protrusion around the mounting position.

[0058] The present application also provides an ultrasonic machining device. Referring to FIGS. 1 to 5, the ultrasonic machining device comprises the main shaft and the ultrasonic tool holder 400 described above, the ultrasonic tool holder 400 is mounted on the main shaft, and the ultrasonic tool holder 400 is provided with a wireless receiving unit 420 and / or a wired receiving unit 410. The front end of the main shaft is connected with the ultrasonic tool holder 400 to drive the ultrasonic tool holder 400 to rotate. The main shaft is provided with a wired transmitting unit 300 and a wireless transmitting unit 200. The main shaft can select different ultrasonic tool holders 400 according to the machining method. Therefore, the same main shaft can be assembled with an ultrasonic tool holder 400 having a wireless receiving unit 420 or an ultrasonic tool holder 400 having a wired receiving unit 410, or can be assembled with an ultrasonic tool holder 400 having two kinds of receiving modes, so as to form electrical transmission with the wireless transmitting unit 200 and the wired transmitting unit 300. Therefore, the main shaft can machine workpieces. When applied to a machine tool, the same machine tool can utilize ultrasonic tool holders 400 with two different transmission modes to machine parts, thereby saving equipment cost.

[0059] In some embodiments of the present application, the ultrasonic tool holder 400 is an ultrasonic cutting tool holder or an ultrasonic milling tool holder, an ultrasonic lathe tool holder. In some embodiments, the ultrasonic tool holder 400 can be a straight blade tool, a disc tool, a milling tool, a lathe tool, etc. to perform different workpiece machining.

[0060] The present application also provides a machine tool comprising the ultrasonic machining device, the ultrasonic generator and the logic judgment module described above. The ultrasonic generator is electrically connected with the wireless transmitting unit 200 and the wired transmitting unit 300. The logic judgment module is signal connected with the ultrasonic generator. The logic judgment module can judge whether the ultrasonic tool holder 400 installed on the spindle is of the type with the wireless receiving unit 420 or the wired receiving unit 410, so as to control the ultrasonic generator to output corresponding electrical signals to the wireless transmitting unit 200 or the wired transmitting unit 300. In some embodiments, the logic judgment module can be made of a PLC controller or an MCU control chip.

[0061] In addition, in some embodiments, the control system of the machine tool can also communicate with the ultrasonic generator, so as to judge the type of the ultrasonic tool holder 400 installed on the spindle, and output corresponding electrical signals (the type of the tool holder can be determined by detecting the impedance, phase and current of the signal feedback).

[0062] The spindle of the machine tool of the present application is provided with the wired transmitting unit 300 and the wireless transmitting unit 200, realizing integrated electrical transmission of wired and wireless transmission, and not affecting the existing structure. The spindle can select different ultrasonic tool holders 400 according to the machining method. Therefore, the same spindle can be assembled with the ultrasonic tool holder 400 having the wireless receiving unit 420 or the ultrasonic tool holder 400 having the wired receiving unit 410, or can be assembled with the ultrasonic tool holder 400 having both receiving modes, so as to form electrical transmission with the wireless transmitting unit 200 and the wired transmitting unit 300, so that the spindle can machine the workpiece. Therefore, the spindle is suitable for high-speed working conditions and high-power machining, and there is no problem of serious heating of the electrically conductive ring. Therefore, the same machine tool can utilize the ultrasonic tool holders 400 of two different transmission modes to machine parts, saving equipment cost.

[0063] The above is only the preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, which should also be considered as the protection scope of the present application.

Claims

1. An energy transmission device mounted on a main shaft, characterized by, The energy transmission device comprises: a wireless transmission unit and a wired transmission unit, the wireless transmission unit being used to form a wireless electric transmission with a wireless receiving unit, and the wired transmission unit being used to form a wired electric transmission with a wired receiving unit.

2. The energy transfer device of claim 1, wherein, The front end of the wired transmission unit extends to the front of the wireless transmission unit, the length of the wireless transmission unit in the axial direction of the main shaft is the height of the wireless transmission unit, the distance between the front end face of the wired transmission unit and the plane where the frontmost end of the wireless transmission unit is located along the axial direction of the main shaft is the height of the wired transmission unit, and the height of the wired transmission unit is greater than or equal to 3 times the height of the wireless transmission unit.

3. The energy transfer device of claim 2, wherein, The height of the wired transmission unit is less than or equal to 50 times the height of the wireless transmission unit.

4. The energy transfer device of claim 1, wherein, The energy transmission device further comprises a mounting seat at the front end of the main shaft, and the wireless transmission unit and the wired transmission unit are mounted on the mounting seat.

5. A spindle characterized by, The energy transmission device comprises the energy transmission device according to any one of claims 1 to 4.

6. The spindle of claim 5, wherein, The energy transmission device further comprises: a mounting seat; The mounting seat comprises a main shaft housing and a front end cover at the front end of the main shaft housing, the wireless transmission unit is mounted on the front end cover, and the wired transmission unit is mounted on the front end cover or the main shaft housing.

7. The spindle of claim 6, wherein, The wired transmission unit is mounted on the front end cover of the main shaft, the front end cover is provided with connecting wires, the connecting wires are electrically connected with the wired transmission unit and the wireless transmission unit respectively, and the connecting wires have lead ends extending to the outside of the front end cover.

8. The spindle of claim 6, wherein, The front end face or the inner side wall of the front end cover is provided with a mounting groove around the central axis thereof, and the wireless transmission unit is arranged in the mounting groove. Alternatively, the inner edge of the front end face of the front end cover is recessed to form a step around the central axis thereof, the wireless transmission unit is arranged in the step, and the inner side face of the wireless transmission unit is outwardly inclined from back to front.

9. The spindle of claim 8, wherein, The central angle of the mounting groove or the step is θ, where π / 4≤θ≤2π.

10. The spindle of claim 6 wherein, The wired transmission unit is mounted on the front end cover of the main shaft, and the front end cover is further provided with a mounting position for mounting the wired transmission unit.

11. The spindle of claim 10, wherein, The mounting position is a limiting groove provided on the front end face of the front end cover.

12. An ultrasonic machining apparatus characterized by comprising: The energy transmission device comprises the main shaft and the ultrasonic tool holder according to any one of claims 5 to 11, the ultrasonic tool holder is mounted on the main shaft, and the ultrasonic tool holder has the wireless receiving unit and / or the wired receiving unit.

13. The ultrasonic machining apparatus according to claim 12, characterized by The ultrasonic tool holder is an ultrasonic cutting tool holder, an ultrasonic turning tool holder or an ultrasonic milling tool holder.

14. A machine tool, characterized by The energy transmission device comprises the ultrasonic machining equipment, the ultrasonic wave generator and the logic judgment module according to any one of claims 12 to 13, the ultrasonic wave generator is electrically connected with the wireless transmission unit and the wired transmission unit, and the logic judgment module is signal-connected with the ultrasonic wave generator.

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