Rotating shaft assembly and ultrasonic spindle including the same

Abstract

The present invention relates to a rotating shaft assembly and an ultrasonic spindle including the same, which comprises a pull rod, a jaw assembly, a rotating shaft, and an end cover. Wherein, a first air passage and a second air passage are arranged inside the upper part of the pull rod, and an annular air passage portion is provided on the outer side wall of the upper part of the pull rod, which is communicated with a third air passage, a fourth air passage, and a fifth air passage arranged inside the rotating shaft, so as to form a dust blowing air path; a first circumferential wire passing hole and a first axial wire passing hole are also arranged inside the pull rod, which are communicated with a second circumferential wire passing hole arranged on the side wall of the rotating shaft, so as to form a wire passing hole channel to introduce an ultrasonic power supply wire. An air passage and a wire passing hole are arranged on the pull rod at the same time, and an air passage and a wire passing hole are also arranged on the rotating shaft, thus simplifying the structure. The structures of the pull rod and the rotating shaft are ingenious and more convenient to manufacture.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic spindles, and particularly to a rotating shaft assembly and an ultrasonic spindle including the same. Background Art

[0002] Ultrasonic machining technology is used for the machining of hard and brittle materials such as glass, sapphire and ceramics. Currently, it has been very widespread, especially in the 3C field. The use of ultrasonic technology for machining ensures the finished product quality of products and overcomes the technical defect of difficult machining of hard and brittle materials.

[0003] Currently, the core component of ultrasonic machining is the ultrasonic spindle, which includes a mechanical spindle and an electric spindle. During machining, the tool holder is installed into the spindle, and then the tool is installed to perform ultrasonic machining on the material. The tool holder installed into the spindle needs to be kept clean and pollution-free, so it is necessary to blow air to achieve positive pressure to prevent external pollutants such as water and oil from entering. For the ultrasonic spindle, due to the high requirements for machining quality, a positive pressure dust blowing design needs to be better implemented. In addition, since the ultrasonic spindle needs to introduce an ultrasonic power cord, the design of the wire passing hole also needs to be comprehensively considered in terms of performance and structural cost. Summary of the Invention

[0004] Based on this, it is necessary to provide a rotating shaft assembly that can achieve positive pressure air blowing for the tool holder hole of the ultrasonic spindle in view of the above technical problems.

[0005] A rotating shaft assembly includes:

[0006] A pull rod, in which a first air passage and a second air passage are arranged inside the upper part of the pull rod, an annular air passage portion is provided on the outer side wall of the upper part of the pull rod, the first air passage extends downward from the upper end face of the pull rod and does not penetrate the pull rod, one end of the second air passage communicates with the first air passage, the other end of the second air passage communicates with the annular air passage portion, and a first wire passing hole is further arranged in the pull rod, and the first wire passing hole includes a first circumferential wire passing hole and a first axial wire passing hole;

[0007] A rotating shaft, in which an axial through hole is provided at the center, the pull rod is inserted into the rotating shaft, and the pull rod can axially move in the through hole of the rotating shaft. An annular air passage is formed jointly by the hollow inner wall of the rotating shaft and the annular air passage portion. A third air passage, a fourth air passage and a fifth air passage are provided in the rotating shaft. One end of the third air passage communicates with the annular air passage, the third air passage also communicates with the fourth air passage, and the fourth air passage extends downward. The fifth air passage is arranged at the lower part of the rotating shaft, the fifth air passage communicates with the fourth air passage, the fifth air passage also communicates with the through hole, and a second circumferential wire passing hole is further arranged in the rotating shaft, and the second circumferential wire passing hole penetrates the side wall of the rotating shaft and communicates with the first wire passing hole;

[0008] An end cover, which is fastened to the upper end surface of the rotating shaft and restricts the pull rod from moving out of the hollow rotating shaft;

[0009] A pulling claw assembly is arranged at the lower part of the pulling rod, and the pulling claw assembly includes a pulling claw, a transition part and an annular spring.

[0010] Furthermore, the rotating shaft includes a hollow first rotating part and a hollow second rotating part, and the first rotating part and the second rotating part are formed separately or integrally formed.

[0011] Furthermore, the annular airway portion is recessed inwardly on the outer side wall of the upper portion of the pull rod.

[0012] Furthermore, the third air channel passes through the inner and outer side walls of the rotating shaft, one end of the third air channel is connected to the through hole, one end of the fifth air channel is connected to the through hole, and the other end of the third air channel is provided with a first plug.

[0013] Furthermore, the fifth air passage passes through the inner and outer side walls of the rotating shaft, and a second plug is provided at the other end of the fifth air passage.

[0014] Furthermore, the lower portion of the pull rod is provided with an internal thread, the adapter is provided with an external thread, and the pull rod and the adapter are threadedly connected.

[0015] Furthermore, the pulling claw is connected to the lower part of the pull rod through a transition portion, the pulling claw is clamped on the transition portion, and the annular spring is fixed around the outer side of the pulling claw.

[0016] Furthermore, the through hole includes a straight hole portion and a tapered hole portion, the pull rod is arranged in the straight hole portion, and the tapered hole portion is used to install the ultrasonic tool handle.

[0017] Furthermore, one end of the first circumferential wire hole is connected to the second circumferential wire hole, and the other end of the first circumferential wire hole is connected to the first axial wire hole. The adapter is also provided with a third axial wire hole, and the lower end of the first axial wire hole is connected to the third axial wire hole at an interval or directly.

[0018] The present invention also provides an ultrasonic spindle, comprising a spindle seat, a bearing, and a wireless transmission device, wherein the wireless transmission device comprises a transmitting coil assembly and a receiving coil assembly, and also comprises a rotating shaft assembly as described in any of the above items, wherein the rotating shaft assembly is supported in the spindle seat by a bearing, the transmitting coil assembly is sleeved on the rotating shaft, and the positive and negative ends of the receiving coil assembly are connected to an electrical connector through a wire passing through the second circumferential wire hole, the first circumferential wire hole, the first axial wire hole and the third axial through hole in sequence, and the electrical connector is detachably connected to the lower part of the adapter.

[0019] The above-mentioned rotating shaft assembly and ultrasonic spindle have at least the following advantages:

[0020] Since the ultrasonic spindle is different from an ordinary spindle and an ultrasonic power cord needs to be provided to connect the ultrasonic power supply into the spindle, therefore, in the present invention, a central through-hole (i.e., the first axial through-hole) and a first circumferential through-hole are provided on the drawbar component of the ultrasonic spindle, and a second circumferential through-hole is provided on the rotating shaft to introduce the ultrasonic power cord; at the same time, a first air passage, a second air passage and an annular air passage part are provided on the drawbar, a third air passage, a fourth air passage and a fifth air passage are provided on the rotating shaft, and the above air passages are communicated, so as to realize that through the central dust blowing air passage on the oil cylinder at the upper part of the spindle, the air flow passes through the drawbar and then through the rotating shaft, and is diverted to the vicinity of the tool holder mounting hole at the lower part of the rotating shaft, so as to realize dust blowing for the tool holder mounting hole and the tool holder. Thus, it can be seen that the drawbar of the present application not only realizes the introduction and connection of the ultrasonic power cord, but also cleverly realizes the integration of the dust blowing air passage. By using the existing central dust blowing air passage, without making many modifications, the dust blowing air passage of the spindle with ultrasonic machining function can be realized, and the dust blowing air passage and the through-line channel are separately and independently arranged on the drawbar, and the structure is simple, ingenious and practical, greatly reducing the manufacturing difficulty. Description of the Drawings

[0021] Figure 1 It is a cross-sectional view of the rotating assembly in one embodiment;

[0022] Figure 2 It is a cross-sectional view of the ultrasonic spindle in one embodiment.

[0023] In the figure, 1, drawbar; 2, adapter part; 3, claw; 4, end cover; 5, first rotating part; 6, second rotating part; 7, counterbore; 8, first air passage; 9, second air passage; 10, annular air passage part; 11, third air passage; 12, fourth air passage; 13, fifth air passage; 14, first axial through-hole; 15, first circumferential through-hole; 16, second circumferential through-hole; 17, third axial through-hole; 18, straight hole part; 19, tapered hole part; 20, relief cavity; 21, first plug; 22, second plug; 100, spindle seat; 200, bearing; 300, transmitting coil assembly; 400, receiving coil assembly; 500, oil cylinder; 600, dust blowing air pipe joint; 700, central dust blowing air passage. Detailed Embodiments

[0024] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following detailed description of the specific embodiments of the present invention will be given in conjunction with the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of 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 spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0025] 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 embodiments. 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 the same type of information 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.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein 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 to be within the scope described in this specification.

[0027] Please refer to Figures 1 to 2 , the rotating shaft assembly in one embodiment includes a pull rod 1, a claw assembly, a rotating shaft, and an end cap 4.

[0028] Inside the upper part of the pull rod 1, a first air passage 8 and a second air passage 9 are provided. On the outer side wall of the upper part of the pull rod 1, an annular air passage part 10 is provided. The first air passage 8 extends downward from the upper end face of the pull rod 1 and does not penetrate the pull rod 1. One end of the second air passage 9 communicates with the first air passage 8, and the other end of the second air passage 9 communicates with the annular air passage part 10. The annular air passage part 10 is recessed inwardly on the outer side wall of the upper part of the pull rod 1. Inside the pull rod 1, a first wire passing hole is provided, and the first wire passing hole includes a first circumferential wire passing hole 15 and a first axial wire passing hole 14. It should be noted that, in one embodiment, the air passage and the wire passing hole in the pull rod 1 are isolated. The position of the air passage in the pull rod is near the upper part in the length direction of the pull rod 1, while the wire passing hole can extend from the upper part of the pull rod 1 to the lower part of the pull rod 1.

[0029] An axial through hole is provided at the center of the rotating shaft. Inside the rotating shaft, a pull rod 1 is inserted, and the pull rod 1 can axially move in the through hole of the rotating shaft. The hollow inner wall of the rotating shaft and the annular air passage part 10 together form an annular air passage. The rotating shaft is provided with a third air passage 11, a fourth air passage 12, and a fifth air passage 13. One end of the third air passage 11 communicates with the annular air passage, the third air passage 11 also communicates with the fourth air passage 12, and the fourth air passage 12 extends downward. The fifth air passage 13 is provided at the lower part of the rotating shaft, the fifth air passage 13 communicates with the fourth air passage 12, and the fifth air passage 13 also communicates with the through hole. The rotating shaft is also provided with a second circumferential wire passing hole 16, and the second circumferential wire passing hole 16 penetrates the side wall of the rotating shaft and communicates with the first wire passing hole. One end of the first circumferential wire passing hole 15 communicates with the second circumferential wire passing hole 16, and the other end of the first circumferential wire passing hole 15 communicates with the first axial wire passing hole 14. The through hole includes a straight hole part 18 and a tapered hole part 19. The pull rod 1 is arranged in the straight hole part 18, and the tapered hole part 19 is used for installing an ultrasonic tool shank.

[0030] The rotating shaft includes a first rotating part 5 and a second rotating part 6. It should be noted that the first rotating part 5 and the second rotating part 6 can be integrally formed, or can be formed separately and then welded or interference-fitted together. Further, one end of the third air passage 11 communicates with the through hole, and a first plug 21 is provided at the other end of the third air passage 11. The third air passage 11 is formed by drilling on the outer side of the rotating shaft. The third air passage 11 is a through hole, but in order to maintain the airtightness of the air passage, the first plug 21 must be provided to prevent gas leakage. Conventionally, a plug is generally formed by soldering. Similarly, the fifth air passage 13 penetrates the inner and outer side walls of the rotating shaft. One end of the fifth air passage 13 communicates with the through hole, and a second plug 22 is provided at the other end.

[0031] The end cover 4 is fastened to the upper end face of the rotating shaft and restricts the pull rod 1 from moving out of the hollow rotating shaft. A counterbore 7 is provided inside the end cover 4 for installing a screw to fix the end cover 4 on the rotating shaft.

[0032] The claw assembly is arranged at the lower part of the pull rod 1, and the claw assembly includes a claw 3, an adapter 2 and an annular spring (not shown). The claw 1 is connected to the lower part of the pull rod 1 through the adapter 2, the claw 3 is clamped on the adapter 2, and the annular spring is fixed around the outer side of the claw 1. Furthermore, the lower part of the pull rod 1 is provided with an internal thread, the adapter 2 is provided with an external thread, and the pull rod 1 and the adapter 2 are threadedly connected. The adapter 2 is also provided with a third axial wire hole 17, and the lower end of the first axial wire hole 14 is connected to the third axial wire hole 17 at an interval or directly connected.

[0033] Figure 1 The relative position relationship between the drawbar 1 and the rotating shaft in the broaching state (i.e. the tool handle is installed in the tapered hole 19). When the tool is loosened, Figure 2 The central push rod (not shown) of the oil and gas cylinder 500 will support the upper end surface of the pull rod 1 and press it downward, and the pull rod 1 will move downward in the straight hole portion 18 until the pull claw 3 enters the tool retraction cavity 20. At this time, the pull claw 3 releases its grip on the ultrasonic tool handle. At the same time, gas is blown in from the dust blowing air pipe joint 600, and the central dust blowing air path 700 connects the air channels on the pull rod 1 and blows the gas into the straight hole portion 18 through the air channels on the rotating shaft. At this time, the gas will also enter the tapered hole portion 19, and positive pressure blowing can be achieved to prevent external dust, water and other impurities from entering the interior of the rotating shaft.

[0034] In addition, the pull rod 1 is provided with a first circumferential wire hole 15 and a first axial wire hole 14, which can realize the introduction of the external ultrasonic power line into the adapter part 2 of the claw assembly below the pull rod 1. The lower part of the third axial wire hole 17 in the adapter part 2 is provided with an internal thread, and the electrical connector (not shown) is provided with an external thread, and the electrical connector and the adapter part 2 are threadedly connected.

[0035] In this way, the pull rod 1 is provided with both an air passage and a wire passage, which very cleverly combines the gas and electrical functions in one pull rod component, greatly reducing the complexity of the structure and facilitating manufacturing.

[0036] The present invention also provides an ultrasonic spindle, comprising the above-mentioned rotating shaft assembly, a spindle seat 100, a bearing 200, and a wireless transmission device, wherein the wireless transmission device comprises a transmitting coil assembly 300 and a receiving coil assembly 400, wherein the rotating shaft assembly is supported in the spindle seat 100 by a plurality of bearings 200, the transmitting coil assembly 300 is sleeved on the rotating shaft, and the positive and negative ends of the receiving coil assembly 400 are connected to an electrical connector through a wire passing through the second circumferential wire hole 16, the first circumferential wire hole 15, the first axial wire hole 14 and the third axial through hole 17 in sequence, and the electrical connector is detachably connected to the lower part of the adapter 2.

[0037] 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-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0038] 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 invention patent should be subject to the appended claims.

Claims

1. A rotating shaft assembly, characterized in that, include: A pull rod, wherein a first air channel and a second air channel are arranged inside the upper part of the pull rod, an annular air channel portion is arranged on the outer side wall of the upper part of the pull rod, the first air channel extends downward from the upper end surface of the pull rod and does not pass through the pull rod, one end of the second air channel is connected to the first air channel, and the other end of the second air channel is connected to the annular air channel portion, and a first wire hole is also arranged inside the pull rod, and the first wire hole includes a first circumferential wire hole and a first axial wire hole; A rotating shaft, the center of which is provided with an axial through hole, the pulling rod is penetrated in the rotating shaft, and the pulling rod can move axially in the through hole of the rotating shaft, the hollow inner wall of the rotating shaft and the annular airway portion together form an annular airway, the rotating shaft is provided with a third airway, a fourth airway and a fifth airway, one end of the third airway is connected with the annular airway, the third airway is also connected with the fourth airway, and the fourth airway extends downward, the fifth airway is arranged at the lower part of the rotating shaft, the fifth airway is connected with the fourth airway, and the fifth airway is also connected with the through hole, the rotating shaft is also provided with a second circumferential through-wire hole, the second circumferential through-wire hole passes through the side wall of the rotating shaft and is connected with the first through-wire hole; An end cover, which is fastened to the upper end surface of the rotating shaft and restricts the pull rod from moving out of the hollow rotating shaft, and a countersunk hole is provided in the end cover for installing screws to fix the end cover on the rotating shaft; A claw assembly, the claw assembly is arranged at the lower part of the pull rod, and the claw assembly includes a claw, a transition part and an annular spring; The adapter portion is further provided with a third axial wire-through hole, and the lower end of the first axial wire-through hole is connected to the third axial wire-through hole with an interval or directly connected.

2. The rotating shaft assembly according to claim 1, wherein, The rotating shaft includes a hollow first rotating part and a hollow second rotating part, and the first rotating part and the second rotating part are formed separately or integrally formed.

3. The rotating shaft assembly according to claim 1, characterized in that The annular air channel portion is arranged to be concave inwardly on the outer side wall of the upper portion of the pull rod.

4. The rotating shaft assembly according to any one of claims 1 to 3, characterized in that, The third air passage passes through the inner and outer side walls of the rotating shaft, one end of the third air passage is communicated with the through hole, and the other end of the third air passage is provided with a first plug.

5. The rotating shaft assembly according to claim 1, characterized in that, The fifth air passage passes through the inner and outer side walls of the rotating shaft, one end of the fifth air passage is communicated with the through hole, and the other end of the fifth air passage is provided with a second plug.

6. The rotating shaft assembly according to claim 1, characterized in that, The lower part of the pull rod is provided with an internal thread, the adapter is provided with an external thread, and the pull rod and the adapter are threadedly connected.

7. The rotating shaft assembly according to claim 6, characterized in that, The pulling claw is connected to the lower part of the pulling rod through a transition part, the pulling claw is clamped on the transition part, and the annular spring is fixed around the outer side of the pulling claw.

8. The rotating shaft assembly according to claim 1, wherein, The through hole includes a straight hole portion and a tapered hole portion, the pull rod is arranged in the straight hole portion, and the tapered hole portion is used for installing the ultrasonic tool handle.

9. The rotating shaft assembly according to claim 1, wherein, One end of the first circumferential wire hole is connected to the second circumferential wire hole, and the other end of the first circumferential wire hole is connected to the first axial wire hole.

10. An ultrasonic spindle, comprising a spindle base, bearings, and a wireless transmission device. The wireless transmission device includes a transmitting coil assembly and a receiving coil assembly, and is characterized in that: It also includes the rotating shaft assembly according to any one of claims 1 to 9, wherein the rotating shaft assembly is supported in a main shaft seat by a bearing, the transmitting coil assembly is sleeved on the rotating shaft, and the positive and negative ends of the receiving coil assembly pass through the second circumferential wire hole, the first circumferential wire hole, the first axial wire hole and the third axial through hole in sequence through wires and are connected to an electrical connector, and the electrical connector is detachably connected to the lower part of the adapter.

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