Ultrasonic electric spindle and its assembly method

Abstract

The present invention relates to an ultrasonic electric spindle and an assembly method thereof. During assembly, a second fastener is sequentially passed through a third fastening hole on an encoder gear and a fourth fastening hole on a wireless receiving ring to tightly connect the encoder gear and the wireless receiving ring. The second fastening hole is exposed in a receiving groove of the wireless receiving ring through a second through hole on the wireless receiving ring. A first fastener is sequentially passed through the second fastening hole on the encoder gear and the first fastening hole on a rotating shaft from the receiving groove to fixedly arrange the encoder gear at the upper end of the rotating shaft. Then, a wireless receiving magnetic core is placed in a receiving slot of the wireless receiving ring, a wireless receiving coil is placed in the wireless receiving magnetic core, and a sealing insulating glue is filled into the wireless receiving magnetic core. Therefore, it can be ensured that both the encoder gear and the wireless receiving assembly are tightly and stably connected to the rotating shaft and rotate with the rotation of the rotating shaft. It is ensured that the size design of the wireless receiving coil meets the requirements for high-power power transmission.

Description

Technical Field

[0001] The invention relates to the technical field of electric spindles, and in particular to an ultrasonic electric spindle and an assembling method thereof. Background Art

[0002] Introducing high-frequency ultrasonic vibration processing mechanism during mechanical processing can not only improve the surface roughness of the cutting surface and enhance the processing accuracy, but also reduce cutting resistance and increase the life of the tool. Therefore, it has gradually been widely used in difficult-to-process materials such as sapphire glass, ceramics, semiconductors, quartz, etc.

[0003] When ultrasonic vibration is introduced into the machining process of the spindle, the ultrasonic transducer needs to obtain a stable high-frequency power supply to make the tool or tool generate high-frequency vibration. In traditional electric spindles, high-frequency power is usually transmitted to the ultrasonic transducer through a stationary carbon brush contacting a high-speed rotating slip ring. This conduction method is called contact conduction. The disadvantage is that the stationary carbon brush will produce friction and wear when contacting the rotating slip ring. The carbon brush must be replaced after working for a period of time. In addition, the contact of the carbon brush is not very stable. The friction and wear of the carbon brush will contaminate the carbon powder inside the spindle, so it is extremely inconvenient to use and causes certain maintenance costs.

[0004] Therefore, a method of introducing ultrasonic power into ultrasonic transducers through wireless transmission has emerged. The wireless transmission component usually includes a wireless receiving component and a wireless transmitting component, wherein the wireless transmitting component is sleeved outside the pull rod, and the wireless receiving component is located below the wireless transmitting component and is also sleeved outside the pull rod. The wireless receiving coil of the wireless receiving component needs to be electrically connected to the ultrasonic transducer located at the front end of the ultrasonic electric spindle, and the ultrasonic transducer will rotate with the rotation of the shaft, so the wireless receiving component also needs to rotate with the rotation of the shaft. Therefore, how to achieve a stable connection between the wireless receiving component and the shaft is an urgent problem to be solved. At the same time, the wireless receiving coil also needs to meet the requirements of wireless transmission of high-power electrical energy. Summary of the invention

[0005] Based on this, it is necessary to provide an ultrasonic electric spindle and an assembly method thereof that can ensure a stable connection between the wireless receiving component and the rotating shaft and meet the requirements of wireless transmission of high-power electrical energy in order to address the above technical problems.

[0006] An ultrasonic electric spindle, comprising:

[0007] The rotating shaft has an upper end surface with a first fastening hole formed downwardly;

[0008] A pull rod assembly, comprising a pull rod, the lower end of which is inserted into the rotating shaft, and the upper end of which extends out of the rotating shaft;

[0009] An encoder gear has a receiving groove formed by upwardly opening its lower end face. A first through hole is opened in the bottom wall of the receiving groove, and the inner diameter of the first through hole is smaller than the inner diameter of the receiving groove. The encoder gear is sleeved outside the pull rod through the first through hole, and the encoder gear is sleeved on the upper end of the rotating shaft through the receiving groove. A second fastening hole is also opened in the bottom wall of the receiving groove. A first fastener is passed through the second fastening hole and the first fastening hole to fixedly arrange the encoder gear on the upper end of the rotating shaft. The encoder gear also has a third fastening hole penetrating through the upper end face and the lower end face, and the third fastening hole is arranged around the receiving groove; and

[0010] A wireless receiving assembly includes a wireless receiving ring, a wireless receiving magnetic core, and a wireless receiving coil. An accommodating groove is formed by downwardly opening the upper end face of the wireless receiving ring. A second through hole is opened in the bottom wall of the accommodating groove, and the second fastening hole is exposed in the accommodating groove of the wireless receiving ring through the second through hole. A fourth fastening hole is opened by upwardly opening the lower end face of the wireless receiving ring. A second fastener is passed through the third fastening hole and the fourth fastening hole to connect the encoder gear and the wireless receiving ring. The wireless receiving coil is located inside the wireless receiving magnetic core, and the wireless receiving magnetic core is located in the accommodating groove of the wireless receiving ring.

[0011] In one embodiment, a positioning boss protrudes upward from the upper end face of the encoder gear. The second fastening hole penetrates upward through the positioning boss, and the positioning boss is located in the second through hole.

[0012] In one embodiment, the second fastening hole is a stepped hole, the first fastening hole is a threaded hole, and the first fastener is a screw. The screw is sequentially passed through the stepped hole and the threaded hole.

[0013] In one embodiment, the number of both the stepped holes and the threaded holes is four. The four stepped holes are evenly distributed on the encoder gear, and the four threaded holes are evenly distributed on the upper end of the rotating shaft.

[0014] In one embodiment, the third fastening hole includes an upper hole and a lower hole that communicate with each other, and the lower hole also communicates with the receiving groove.

[0015] In one embodiment, the upper hole is a long strip-shaped hole, the lower hole is a rectangular hole with rounded corners, and one side of the rectangular hole with rounded corners communicates with the receiving groove.

[0016] In one embodiment, a plurality of teeth are provided on the outer peripheral side of the encoder gear. A detection notch is opened on the outer peripheral side of the wireless receiving ring. A plurality of dynamic balance holes are also opened on the encoder gear, and the dynamic balance holes extend radially.

[0017] In one embodiment, it further includes a bearing assembly, and the bearing assembly includes a bearing housing, a bearing, a bearing inner ring locking retaining ring and a bearing seal cover. The bearing housing is sleeved outside the rotating shaft. The bearing is sleeved outside the rotating shaft and is located between the bearing housing and the rotating shaft. The bearing inner ring locking retaining ring is tightly sleeved outside the rotating shaft and is located at the rear end of the bearing. The bearing seal cover is sleeved outside the rotating shaft and is arranged at the rear end of the bearing housing.

[0018] An assembling method of the ultrasonic electric spindle as described in any one of the above, comprising the following steps:

[0019] Insert the lower end of the drawbar assembly into the rotating shaft;

[0020] Sequentially pass the second fastener through the third fastening hole on the encoder gear and the fourth fastening hole on the wireless receiving ring to tightly connect the encoder gear and the wireless receiving ring. The second fastening hole is exposed in the receiving groove of the wireless receiving ring through the second through hole on the wireless receiving ring;

[0021] Sequentially pass the first fastener from the receiving groove through the second fastening hole on the encoder gear and the first fastening hole on the rotating shaft to fixedly arrange the pre-tightly connected wireless receiving ring and encoder gear at the upper end of the rotating shaft;

[0022] Place the wireless receiving magnetic core in the receiving groove of the wireless receiving ring;

[0023] Place the wireless receiving coil in the wireless receiving magnetic core and fill the wireless receiving magnetic core with a sealing insulating glue.

[0024] In one embodiment, before the step of sequentially passing the first fastener from the receiving groove through the second fastening hole and the first fastening hole to fixedly arrange the pre-tightly connected wireless receiving ring and encoder gear at the upper end of the rotating shaft, it further includes the step of sleeving the bearing assembly outside the rotating shaft, specifically including:

[0025] Sleeve the bearing housing and the bearing outside the rotating shaft, and the bearing is located between the bearing housing and the rotating shaft;

[0026] Thread the bearing inner ring locking retaining ring onto the rotating shaft, and the bearing inner ring locking retaining ring is located at the rear end of the bearing;

[0027] Arrange the bearing seal cover outside the rotating shaft, and the bearing seal cover is located at the rear end of the bearing housing.

[0028] The above ultrasonic electric spindle and its assembling method have at least the following advantages:

[0029] During assembly, insert the lower end of the pull rod assembly into the rotating shaft, and the upper end of the pull rod assembly extends out of the rotating shaft. Insert the second fastener successively into the third fastening hole on the encoder gear and the fourth fastening hole on the wireless receiving ring to tightly connect the encoder gear and the wireless receiving ring. The second fastening hole is exposed in the receiving groove of the wireless receiving ring through the second through hole on the wireless receiving ring. Then, insert the first fastener successively from the receiving groove into the second fastening hole on the encoder gear and the first fastening hole on the rotating shaft to fixedly arrange the pre-tightly connected wireless receiving ring and encoder gear at the upper end of the rotating shaft. Then, place the wireless receiving magnetic core in the receiving groove of the wireless receiving ring, place the wireless receiving coil in the wireless receiving magnetic core, and fill the wireless receiving magnetic core with sealing insulating glue. Therefore, first tightly connect the encoder gear and the wireless receiving ring through the second fastener, and then fixedly connect the encoder gear and the rotating shaft through the first fastener, which can ensure that both the encoder gear and the wireless receiving component are tightly and stably connected to the rotating shaft and rotate with the rotation of the rotating shaft. In addition, the space size for installing the wireless receiving component inside the main shaft is limited. When installing the wireless receiving component inside the main shaft, it is necessary to ensure that the size of the wireless receiving coil filled with sealing insulating glue in the wireless receiving magnetic core of the wireless receiving component meets the requirements for wirelessly transmitting high-power electric energy. If the size of the wireless receiving coil is too small, the performance of the ultrasonic electric spindle will be reduced, it cannot receive high-power electric energy transmission, and it cannot meet the large amplitude of the tool used to process objects at the front end of the final ultrasonic electric spindle. Therefore, when fixedly connecting the wireless receiving ring and the encoder gear in this application, the method of setting the fourth fastening hole (threaded hole) on the bottom surface of the wireless receiving ring is adopted. In this way, the fastener can be inserted starting from the third fastening hole of the encoder gear to fix the two, without starting to insert the fastener from the inner ring side or outer ring side of the wireless receiving ring (this will cause through holes to be opened on the upper end surface of the wireless receiving component and cause the fastener to occupy the radial space of the wireless receiving coil, resulting in the size of the wireless receiving coil being too small to meet the requirements for wireless power transmission and causing the wireless coil to burn out during high-power transmission). It can be seen that the installation method of this application is beneficial to increasing the size design of the wireless receiving coil and improving the requirements of the wireless receiving component for adapting to high-power wireless power transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a cross-sectional view of an ultrasonic electric spindle in an embodiment;

[0031] Figure 2 is Figure 1 a partial schematic view of;

[0032] Figure 3 is Figure 1 another cross-sectional view of the ultrasonic electric spindle shown;

[0033] Figure 4 isFigure 3 Partial schematic view of

[0034] Figure 5 is Figure 1 Another cross-sectional view of the ultrasonic motorized spindle shown in

[0035] Figure 6 is Figure 5 Partial schematic view of

[0036] Figure 7 is Figure 5 Another partial schematic view of

[0037] In the figure, 10 is the ultrasonic motorized spindle; 100 is the rotating shaft; 200 is the pull rod assembly; 300 is the encoder gear; 400 is the wireless receiving assembly; 500 is the bearing assembly; 600 is the ultrasonic transducer; 700 is the wire; 110 is the first fastening hole; 210 is the pull rod; 220 is the disc spring; 310 is the accommodating groove; 320 is the first through hole; 330 is the second fastening hole; 340 is the third fastening hole; 410 is the wireless receiving ring; 420 is the wireless receiving magnetic core; 411 is the accommodating groove; 412 is the second through hole; 413 is the fourth fastening hole; 341 is the upper hole; 342 is the lower hole; 350 is the positioning boss; 510 is the bearing seat; 520 is the bearing; 530 is the bearing inner ring locking collar; 540 is the bearing seal cover; 360 is the wire passing hole; 120 is the wire passing channel; 610 is the positive electrode plate; 620 is the negative electrode plate; 370 is the accommodating space; 351 is the first wire accommodating groove; 130 is the wire routing groove. Detailed implementation manners

[0038] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manners.

[0040] It should be understood that in the present invention, terms such as "first" and "second" are used to describe various information, but this information should not be limited to these terms, and these terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention pertains. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0042] It should be noted that in this article, "front end" and "back end" respectively refer to: during the processing process, the one closer to the processing end is the "front end", and the end farther from the processing end is the "back end". They are relative concepts and can therefore change according to their different positions and different practical states. Therefore, these or other orientations should not be used as restrictive terms. In this article, "upper end" and "lower end" are referenced based on the orientations shown in each view. The "upper end" is equivalent to the "back end" of the farther processing end, the "lower end" is equivalent to the "front end" of the closer processing end, "above" is equivalent to the "rear" of the farther processing end, and "below" is equivalent to the "front" of the closer processing end.

[0043] Please refer to Figures 1 to 4 In an ultrasonic motorized spindle 10 in an embodiment, it includes a rotating shaft 100, a pull rod assembly 200, an encoder gear 300, a wireless receiving assembly 400, a bearing assembly 500, and an ultrasonic transducer 600. The wireless receiving assembly 400 is electrically connected to an ultrasonic power supply through wireless transmission, and transmits high-frequency signals to the ultrasonic transducer 600 through a wire 700 (as Figure 5 shown).

[0044] Please refer to Figure 2 As shown, a first fastening hole 110 is formed by opening downward on the upper end surface of the rotating shaft 100. Specifically, the first fastening hole 110 can be a threaded hole, and the number of threaded holes is four. The four threaded holes are evenly distributed on the upper end of the rotating shaft 100. Of course, in other embodiments, the number of the first fastening holes 110 can also be three, two, etc.

[0045] The tie rod assembly 200 includes a tie rod 210 and a disc spring 220. The disc spring 220 is sleeved outside the tie rod 210. The lower end of the tie rod 210 passes through the rotating shaft 100, and the upper end of the tie rod 210 extends out of the rotating shaft 100.

[0046] The encoder gear 300 is arranged below the wireless receiving assembly 400. A receiving groove 310 is formed by upwardly opening the lower end face of the encoder gear 300. A first through hole 320 is opened on the bottom wall of the receiving groove 310, and the inner diameter of the first through hole 320 is smaller than the inner diameter of the receiving groove 310. The encoder gear 300 is sleeved outside the tie rod 210 through the first through hole 320, and the encoder gear 300 is sleeved on the upper end of the rotating shaft 100 through the receiving groove 310.

[0047] A second fastening hole 330 is also opened on the bottom wall of the receiving groove 310. A first fastener passes through the second fastening hole 330 and the first fastening hole 110 to fixedly arrange the encoder gear 300 on the upper end of the rotating shaft 100. Specifically, the second fastening hole 330 is a stepped hole, and the first fastener is a screw. The screw passes through the stepped hole and the threaded hole in sequence to fixedly arrange the encoder gear 300 on the upper end of the rotating shaft 100. Correspondingly, the number of the stepped holes is also four, and the four stepped holes are evenly distributed on the encoder gear 300. Of course, in other embodiments, the number of the second fastening holes 330 can also be three or two, etc.

[0048] Please refer to Figure 4 , the encoder gear 300 is also provided with a third fastening hole 340 penetrating the upper end face and the lower end face, and the third fastening hole 340 is arranged around the receiving groove 310. Specifically, the number of the third fastening holes 340 is three, and the three third fastening holes 340 are evenly distributed on the encoder gear 300.

[0049] The wireless receiving assembly 400 includes a wireless receiving ring 410, a wireless receiving magnetic core 420 and a wireless receiving coil (not shown in the figure). A receiving groove 411 is formed by downwardly opening the upper end face of the wireless receiving ring 410. A second through hole 412 is opened on the bottom wall of the receiving groove 411. The second fastening hole 330 is exposed in the receiving groove 411 of the wireless receiving ring 410 through the second through hole 412, ensuring that the first fastener can be inserted into the second fastening hole 330 and the first fastening hole 110 from the receiving groove 411 at one time.

[0050] The lower end face of the wireless receiving ring 410 is provided with a fourth fastening hole 413 opening upward. A second fastener is passed through the third fastening hole 340 and the fourth fastening hole 413 to connect the encoder gear 300 and the wireless receiving ring 410. Correspondingly, the number of the fourth fastening holes 413 is also three. The fourth fastening hole 413 can be a blind hole or a through hole with internal threads. The third fastening hole 340 includes an upper hole 341 and a lower hole 342 that communicate with each other, and the lower hole 342 also communicates with the accommodation groove 310. For example, the upper hole 341 can be a long strip-shaped hole, and the lower hole 342 is a rectangular hole with rounded corners. One side of the rectangular hole with rounded corners communicates with the accommodation groove 310. The long strip-shaped upper hole 341 can reduce the alignment difficulty between it and the fourth fastening hole 413.

[0051] The wireless receiving coil is located inside the wireless receiving core 420, and the wireless receiving core 420 is located inside the accommodation groove 411 of the wireless receiving ring 410. The wireless receiving core 420 is connected to the inner wall of the wireless receiving ring 410 through a sealant. The wireless receiving coil is wound around the wireless receiving core 420 and then filled with an insulating sealant. Both ends of the wireless receiving coil are led out from the wireless receiving ring 410 through wires 700.

[0052] Further, a positioning boss 350 protrudes upward from the upper end face of the encoder gear 300. The second fastening hole 330 penetrates through the positioning boss 350 upward. When the encoder gear 300 and the wireless receiving ring 410 are assembled, the positioning boss 350 is located inside the second through hole 412. By providing the positioning boss 350, when the encoder gear 300 and the wireless receiving ring 410 are assembled, positioning can be provided, improving the convenience of assembly.

[0053] Further, a plurality of teeth are provided on the outer peripheral side of the encoder gear 300, and a detection notch is provided on the outer peripheral side of the wireless receiving ring 410. The encoder can obtain the rotation speed and angle of the rotating shaft 100 by detecting the position of the detection notch and the rotation speed and angle of the encoder gear 300. A plurality of dynamic balance holes are also provided on the encoder gear 300, and the dynamic balance holes extend in the radial direction. The dynamic balance can be adjusted by loading dynamic balance members into the dynamic balance holes.

[0054] Please refer to Figure 2 and Figure 4 , the ultrasonic electric spindle 10 further includes a bearing assembly 500. The bearing assembly 500 includes a bearing seat 510, a bearing 520, a bearing inner ring locking press ring 530, and a bearing seal cover 540. The bearing seat 510 of the bearing 520 is sleeved outside the rotating shaft 100. The bearing 520 is sleeved outside the rotating shaft 100 and is located between the bearing seat 510 and the rotating shaft 100. The bearing inner ring locking press ring 530 is locked and sleeved outside the rotating shaft 100 and is located at the rear end of the bearing 520. The bearing seal cover 540 is sleeved outside the rotating shaft 100 and is provided at the rear end of the bearing seat 510.

[0055] See also Figures 5 to 7 The encoder gear 300 is also provided with two threading holes 360, which are symmetrically arranged about the axis of the ultrasonic electric spindle 10, and are used for the wires 700 to pass through. The encoder gear 300 is used to cooperate with the encoder to detect the rotation speed and angle of the rotating shaft 100. Specifically, the two threading holes 360 are provided on the bottom wall of the accommodating groove 310, and are staggered with the second fastening hole 330.

[0056] The rotating shaft 100 has two threading channels 120 along the axial direction of the ultrasonic electric spindle 10, and the two threading channels 120 are symmetrically arranged about the axis of the ultrasonic electric spindle 10. One end of the threading channel 120 is connected to the threading hole 360, and the other end of the threading channel 120 passes through the bottom of the rotating shaft 100.

[0057] The ultrasonic transducer 600 is disposed at the bottom of the rotating shaft 100. The ultrasonic transducer 600 includes a positive electrode sheet 610 and a negative electrode sheet 620. A wire 700 passes through a threading hole 360 ​​and a threading channel 120 corresponding to the threading hole 360 ​​and is electrically connected to the positive electrode sheet 610. Another wire 700 passes through another threading hole 360 ​​and another threading channel 120 corresponding to the another threading hole 360 ​​and is electrically connected to the negative electrode sheet 620. That is, one wire 700 is electrically connected to the positive electrode sheet 610, and the other wire 700 is electrically connected to the negative electrode sheet 620.

[0058] Since the encoder gear 300 is provided with two threading holes 360 which are symmetrically arranged about the axis of the ultrasonic electric spindle 10, the rotating shaft 100 is provided with two threading channels 120 along the axial direction of the ultrasonic electric spindle 10, and the two threading channels 120 are symmetrically arranged about the axis of the ultrasonic electric spindle 10, one end of the threading channel 120 is connected to the threading hole 360, and the other end of the threading channel 120 passes through the bottom of the rotating shaft 100, therefore, a wire 700 passes through a threading hole 360 ​​and a threading channel 120 corresponding to the threading hole 360 ​​and then connects to the positive electrode The two wires 700 are electrically connected to the negative electrode sheet 610, and the other wire 700 is electrically connected to the negative electrode sheet 620 after passing through another wire threading hole 360 ​​and another wire threading channel 120 corresponding to the other wire threading hole 360. Therefore, the two wires 700 are separated and will not interfere with or entangle with each other even in the case of high-speed rotation. In addition, since the two wire threading holes 360 and the two wire threading channels 120 are symmetrically arranged about the axis of the ultrasonic electric spindle 10, it is possible to effectively avoid opening a hole for the wire 700 to pass through and affecting the dynamic balance of the entire ultrasonic electric spindle 10, thereby ensuring the machining accuracy.

[0059] Further, the positioning boss 350 extends into the second through hole 412. Thus, the wireless receiving magnetic core 420, the inner side wall of the second through hole 412, and the positioning boss 350 together form a receiving space 370 for accommodating the wire 700, allowing the length of the wire 700 to be set slightly longer to avoid the wire 700 being easily broken.

[0060] Further, a first wire groove 351 is formed by extending the top surface of the positioning boss 350 downward. The first wire groove 351 communicates with the wire threading hole 360 and the receiving space 370. Therefore, when the wire 700 is led out from the wireless receiving ring 410 and then passes through the wire threading hole 360 of the encoder gear 300, the first wire groove 351 can provide an avoidance space for the wire 700 to prevent the wire 700 from being flattened. The number of the first wire grooves 351 is two, and the two first wire grooves 351 are symmetrically arranged on the positioning boss 350 with respect to the axis of the ultrasonic electric spindle 10.

[0061] Please refer to Figure 7 , further, a wire groove 130 is formed at the bottom of the rotating shaft 100 along the radial direction of the ultrasonic electric spindle 10. The wire groove 130 communicates with the wire threading channel 120. The ultrasonic transducer 600 further includes a housing, and a wire passing hole is formed in the housing along the axial direction of the ultrasonic electric spindle 10. The wire 700 is led out from the bottom end of the wire threading channel 120 to the wire groove 130, and then is electrically connected to the positive electrode plate 610 or the negative electrode plate 620 after passing through the wire passing hole. Since the wire threading channel 120 and the wire passing hole are not directly opposite, if the wire groove 130 is not formed, the wire 700 will be squeezed between the rotating shaft 100 and the ultrasonic transducer 600, easily causing the wire 700 to be flattened. However, by forming the wire groove 130, a wire passing space is provided for the wire 700, which can effectively prevent the wire 700 from being flattened.

[0062] The present invention also provides an assembling method for the above ultrasonic electric spindle 10, including the following steps:

[0063] Step S100, inserting the lower end of the pull rod assembly 200 into the rotating shaft 100. The upper end of the pull rod assembly 200 extends out of the rotating shaft 100.

[0064] Step S200, successively insert the second fastener into the third fastening hole 340 on the encoder gear 300 and the fourth fastening hole 413 on the wireless receiving ring 410 to tightly connect the encoder gear 300 and the wireless receiving ring 410. The second fastening hole 330 is exposed in the receiving groove 411 of the wireless receiving ring 410 through the second through hole 412 on the wireless receiving ring 410. Specifically, insert the second fastener successively from the bottom of the encoder gear 300 into the third fastening hole 340 and the fourth fastening hole 413 to tightly connect the encoder gear 300 and the wireless receiving ring 410.

[0065] Step S300, sleeved the bearing 520 assembly 500 outside the rotating shaft 100. Specifically, it includes:

[0066] Step S310, sleeved the bearing seat 510 and the bearing 520 outside the rotating shaft 100, and the bearing 520 is located between the bearing seat 510 and the rotating shaft 100.

[0067] Step S320, screwed the bearing inner ring locking retainer 530 outside the rotating shaft 100, and the bearing inner ring locking retainer 530 is located at the rear end of the bearing 520.

[0068] Step S330, set the bearing seal cover 540 outside the rotating shaft 100, and the bearing seal cover 540 is located at the rear end of the bearing seat 510.

[0069] It should be noted that there is no limitation on the sequence among Step S100, Step S200 and Step S300. It can be carried out according to the above steps, or Step S100 and Step S200 can be carried out simultaneously, followed by Step S300, or Step S300 can be carried out first, and then Step S100 and Step S200.

[0070] Step S400, successively insert the first fastener from the receiving groove 411 into the second fastening hole 330 on the encoder gear 300 and the first fastening hole 110 on the rotating shaft 100 to fixedly set the pre-tightly connected wireless receiving ring 410 and encoder gear 300 at the upper end of the rotating shaft 100.

[0071] Step S500, place the wireless receiving magnetic core 420 into the receiving groove 310 of the wireless receiving ring 410.

[0072] Step S600, place the wireless receiving coil into the wireless receiving magnetic core 420 and fill the wireless receiving magnetic core 420 with sealing insulating glue. Therefore, it avoids the situation that the first fastener cannot be inserted into the second fastening hole 330 and the first fastening hole 110 after the wireless receiving magnetic core 420 and the wireless receiving coil are first installed into the wireless receiving ring 410.

[0073] During assembly, insert the lower end of the pull rod assembly 200 into the rotating shaft 100, and the upper end of the pull rod assembly 200 extends out of the rotating shaft 100. Pass the second fastener through the third fastening hole 340 on the encoder gear 300 and the fourth fastening hole 413 on the wireless receiving ring 410 in sequence to firmly connect the encoder gear 300 and the wireless receiving ring 410. The second fastening hole 330 is exposed in the receiving groove 411 of the wireless receiving ring 410 through the second through hole 412 on the wireless receiving ring 410. Then, pass the first fastener through the second fastening hole 330 on the encoder gear 300 and the first fastening hole 110 on the rotating shaft 100 in sequence from the receiving groove 411 to fixedly arrange the pre-fastened wireless receiving ring 410 and encoder gear 300 at the upper end of the rotating shaft 100. Next, place the wireless receiving magnetic core 420 in the accommodating groove 310 of the wireless receiving ring 410, place the wireless receiving coil in the wireless receiving magnetic core 420, and fill the wireless receiving magnetic core 420 with sealing insulating glue. Therefore, first firmly connect the encoder gear 300 and the wireless receiving ring 410 with the second fastener, and then fixedly connect the encoder gear 300 and the rotating shaft 100 with the first fastener, which can ensure that both the encoder gear 300 and the wireless receiving component 400 are firmly and stably connected to the rotating shaft 100 and rotate with the rotation of the rotating shaft 100.

[0074] In addition, the space size for installing the wireless receiving component 400 inside the main shaft is limited. When installing the wireless receiving component 400 inside the main shaft, it is necessary to ensure that the size of the wireless receiving coil filled with sealing insulating glue in the wireless receiving magnetic core 420 of the wireless receiving component 400 meets the requirements for wirelessly transmitting high-power electrical energy. If the size of the wireless receiving coil is too small, the performance of the ultrasonic electric spindle will be reduced, it cannot receive high-power electrical energy transmission, and it cannot meet the large amplitude of the tool at the front end of the final ultrasonic electric spindle for processing objects. Therefore, when fixedly connecting the wireless receiving ring 410 and the encoder gear 300 in this application, a method of setting a fourth fastening hole (threaded hole) on the bottom surface of the wireless receiving ring 410 is adopted. In this way, the fastener can be passed through from the third fastening hole of the encoder gear 300 to fix the two, without starting to pass the fastener from the inner ring side or outer ring side of the wireless receiving ring 410 (this will cause through holes to be opened on the upper end surface of the wireless receiving component and cause the fastener to occupy the radial space of the wireless receiving coil, resulting in the size of the wireless receiving coil being too small to meet the requirements for wireless electrical energy transmission and causing the phenomenon of the wireless coil burning out during high-power transmission). It can be seen that the installation method of this application is beneficial to increasing the size design of the wireless receiving coil and improving the requirements of the wireless receiving component for adapting to high-power wireless electrical energy transmission.

[0075] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0076] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An ultrasonic electric spindle, characterized in that, Comprising: A rotating shaft, at the upper end face of which a first fastening hole is formed by downward opening; A pull rod assembly, including a pull rod, the lower end of which passes through the rotating shaft, and the upper end of which extends out of the rotating shaft; An encoder gear, at the lower end face of which a receiving groove is formed by upward opening, a first through hole is formed in the bottom wall of the receiving groove, the inner diameter of the first through hole is smaller than the inner diameter of the receiving groove, the encoder gear is sleeved outside the pull rod through the first through hole, the encoder gear is sleeved on the upper end of the rotating shaft through the receiving groove, a second fastening hole is further formed in the bottom wall of the receiving groove, and the encoder gear is fixedly arranged on the upper end of the rotating shaft by a first fastener passing through the second fastening hole and the first fastening hole. The encoder gear is further provided with a third fastening hole penetrating through the upper end face and the lower end face, and the third fastening hole is arranged around the receiving groove; and a wireless receiving assembly, including a wireless receiving ring, a wireless receiving magnetic core and a wireless receiving coil, at the upper end face of the wireless receiving ring a receiving groove is formed by downward opening, a second through hole is formed in the bottom wall of the receiving groove, the second fastening hole is exposed in the receiving groove of the wireless receiving ring through the second through hole, a fourth fastening hole is formed by upward opening in the lower end face of the wireless receiving ring, and the encoder gear and the wireless receiving ring are connected by a second fastener passing through the third fastening hole and the fourth fastening hole. The wireless receiving coil is located inside the wireless receiving magnetic core, and the wireless receiving magnetic core is located in the receiving groove of the wireless receiving ring; A wire passing hole is further formed in the encoder gear, and a wire passing channel is formed axially along the ultrasonic electric spindle in the rotating shaft, one end of which is communicated with the wire passing hole, and the other end penetrates through the bottom of the rotating shaft; and a wire is further included, one end of which is connected to the wireless receiving coil, and the other end sequentially passes through the wire passing hole, the wire passing channel and is connected to an ultrasonic transducer at the bottom of the rotating shaft.

2. The ultrasonic electric spindle according to claim 1, characterized in that A positioning boss protrudes upward from the upper end face of the encoder gear, the second fastening hole penetrates through the positioning boss upward, and the positioning boss is located in the second through hole.

3. The ultrasonic electric spindle according to claim 2, wherein The second fastening hole is a stepped hole, the first fastening hole is a threaded hole, the first fastener is a screw, and the screw sequentially passes through the stepped hole and the threaded hole.

4. The ultrasonic electric spindle according to claim 3, characterized in that, The number of the stepped holes and the threaded holes is four each, the four stepped holes are uniformly distributed on the encoder gear, and the four threaded holes are uniformly distributed on the upper end of the rotating shaft.

5. The ultrasonic electric spindle according to claim 1, wherein The third fastening hole includes an upper hole and a lower hole which are communicated with each other, and the lower hole is further communicated with the receiving groove.

6. The ultrasonic electric spindle according to claim 5, characterized in that, The upper hole is a long strip-shaped hole, the lower hole is a rectangular hole with a rounded corner, and one side of the rectangular hole with a rounded corner is communicated with the receiving groove.

7. The ultrasonic electric spindle according to any one of claims 1 to 5, characterized in that, A plurality of teeth are arranged on the outer peripheral side of the encoder gear, a detection notch is formed in the outer peripheral side of the wireless receiving ring, and a plurality of dynamic balance holes are further formed in the encoder gear, and the dynamic balance holes extend radially.

8. The ultrasonic electric spindle according to any one of claims 1 to 5, characterized in that, It further includes a bearing assembly, which includes a bearing housing, a bearing, a bearing inner ring locking retaining ring and a bearing seal cover. The bearing housing is sleeved outside the rotating shaft. The bearing is sleeved outside the rotating shaft and located between the bearing housing and the rotating shaft. The bearing inner ring locking retaining ring is tightly sleeved outside the rotating shaft and located at the rear end of the bearing. The bearing seal cover is sleeved outside the rotating shaft and arranged at the rear end of the bearing housing.

9. An assembly method of an ultrasonic electric spindle according to any one of claims 1 to 8, characterized in that, It includes the following steps: Insert the lower end of the pull rod assembly into the rotating shaft; Sequentially pass a second fastener through a third fastening hole on the encoder gear and a fourth fastening hole on the wireless receiving ring to tightly connect the encoder gear and the wireless receiving ring. The second fastening hole is exposed in the receiving groove of the wireless receiving ring through a second through hole on the wireless receiving ring; Sequentially pass a first fastener from the receiving groove through a second fastening hole on the encoder gear and a first fastening hole on the rotating shaft to fixedly arrange the pre-tightly connected wireless receiving ring and encoder gear at the upper end of the rotating shaft; Place the wireless receiving magnetic core in the receiving groove of the wireless receiving ring; Place the wireless receiving coil in the wireless receiving magnetic core and fill the wireless receiving magnetic core with a sealing insulating glue.

Images