Radial power supply type air cooling main shaft unit

Abstract

The utility model relates to the technical field of precision machining, and discloses a radial power supply type air cooling main shaft unit which comprises a main shaft body, a shaft core and a wireless induction module, the shaft core is arranged in the main shaft body, and the wireless induction module is arranged in the main shaft body and located on the peripheral face of the shaft core. The wireless induction module comprises a power receiving module and a power supply module which are oppositely arranged, and the power receiving module and the power supply module are arranged at intervals in the radial direction of the shaft core; the main shaft unit is further provided with an air cooling structure which is used for introducing cooling air to cool the wireless induction module. The overall axial size of the main shaft can be reduced, the wireless induction module is subjected to air cooling through the air cooling structure, and the working reliability of the main shaft unit is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of precision machining, and more specifically, to a radially powered air-cooled spindle unit. Background Art

[0002] Ultrasonic machining is widely used in the machining of non-metallic, hard and brittle materials that are difficult to machine, as well as in the machining of tiny holes and deep holes, because the tool tip has ultrasonic energy. The spindle generally transmits energy through a wireless sensing module. The existing wireless sensing module uses an axially arranged power supply module and a power receiving module, which increases the overall axial size of the spindle. The corresponding areas of the power supply module and the power receiving module are also small, which affects the efficiency of power transmission. In addition, the existing spindle with a wireless sensing module has a heating problem when the wireless sensing module is working. As the power transmission power increases, the heating problem becomes more obvious, which also affects the overall working efficiency of the spindle. Summary of the invention

[0003] The utility model aims to provide a radially powered air-cooled spindle unit to address the technical problems existing in the prior art, which can reduce the overall axial size of the spindle and realize the air cooling function to ensure the reliability of the spindle unit.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] The utility model discloses a radially powered air-cooled spindle unit, comprising a spindle body, a shaft core, and a wireless sensing module. The shaft core is arranged in the spindle body, and the wireless sensing module is arranged in the spindle body and on the outer peripheral surface of the shaft core.

[0006] The wireless sensing module comprises a power receiving module and a power supply module which are arranged opposite to each other, and the power receiving module and the power supply module are arranged at intervals along the radial direction of the shaft core; the spindle unit has an air cooling structure for introducing cooling gas to cool the wireless sensing module.

[0007] Furthermore, the air cooling structure is connected to an air source for performing air curtain sealing on the spindle unit.

[0008] Furthermore, it also includes a vibrator and an end cover, wherein the vibrator is arranged at the end of the shaft core; the end cover is arranged at the end of the main shaft body, and the end cover corresponds to the position of the vibrator and is clearance-matched with the vibrator.

[0009] Furthermore, a radial air vent connected to the cooling gas is provided on the side wall of the main shaft body, and a first axial air vent and a second axial air vent connected to the radial air vent are axially provided; the first axial air vent is connected to the inner cavity of the end cover, and the second axial air vent is connected to the wireless sensing module.

[0010] Furthermore, the power receiving module includes a power receiving shell arranged on the outer peripheral surface of the shaft core and a power receiving unit arranged in the power receiving shell; the power supply module includes a power supply shell connected to the inner wall of the main shaft body and a power supply unit arranged in the power supply shell; a gap is formed between the power receiving unit and the power supply unit, and the gap or / and the outer periphery of the power supply shell are connected to the second axial vent.

[0011] Furthermore, a ventilation groove is arranged on the outer peripheral surface of the power supply shell, and a radial groove is arranged on the end surface of the power supply shell, and the radial grooves are respectively connected to the ventilation groove and the inner cavity of the power supply shell.

[0012] Furthermore, an exhaust channel is also provided on the main shaft body, and the exhaust channel is communicated with the gap and the ventilation groove in the wireless sensing module.

[0013] Furthermore, an inner spacer and an outer spacer are relatively arranged in the main shaft body. The inner spacer and the outer spacer are arranged at intervals along the radial direction of the shaft core, and respectively limit the power receiving module and the power supply module.

[0014] Furthermore, the outer spacer is provided with an outer ring groove connected to the exhaust channel, and an outer ring radial groove connected to the outer ring groove is provided, and the outer ring radial groove is also connected to the cavity between the inner spacer and the outer spacer.

[0015] Furthermore, a front bearing group and a rear bearing group are relatively arranged in the main shaft body and on the outer peripheral surface of the shaft core, and the front bearing group and the rear bearing group are located on both sides of the wireless sensing module.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In the utility model, the power receiving module and the power supply module are arranged at radial intervals along the shaft core, so that the overall axial size of the spindle unit can be reduced, and the installation and replacement of the spindle unit as a whole can be facilitated; the wireless sensing module is cooled by arranging an air cooling structure, thereby ensuring the reliability of the operation of the spindle unit, and the air cooling structure is connected to the existing air curtain sealing air source on the spindle body, without adding additional rotary joints and air circuits, the structure is simple, the cost is low, and the cooling is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the scheme of the utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 It is a schematic structural diagram of the radially powered air-cooled spindle unit of the utility model.

[0020] Figure 2 This is another schematic diagram of the radially powered air-cooled spindle unit of the present invention.

[0021] Figure 3 For the utility model Figure 1 AA section view.

[0022] Figure 4 For the utility model Figure 1 BB cross-sectional view.

[0023] Figure 5 It is a structural diagram of the power receiving shell in the utility model.

[0024] Among them, 1-main shaft body, 2-shaft core, 3-front bearing group, 4-rear bearing group, 7-vibrator, 8-end cover, 11-trachea joint, 12-outer spacer, 13-inner spacer, 101-radial vent, 102-first axial vent, 103-second axial vent, 104-exhaust channel, 121-outer ring radial groove, 23-power receiving module, 231-power receiving shell, 232-power receiving unit, 24-power supply module, 241-power supply shell, 242-power supply unit, 243-radial groove, 244-annular groove. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the directions or positions indicated by terms such as "length", "width", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the directions or positions shown in the drawings, which are only for the convenience of description and cannot be understood as limitations on the present technical solution.

[0026] The terms "including" and "having" and any variations thereof in the specification and claims of the utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions; the terms "first", "second", etc. in the specification and claims of the utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In the specification and claims of the utility model and the above-mentioned drawings, when an element is referred to as "fixed to" or "mounted on" or "disposed on" or "connected to" another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as "connected to" another element, it may be directly or indirectly connected to the other element.

[0027] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] See also Figure 1 and Figure 2 As shown, the utility model provides a radially powered air-cooled spindle unit, comprising a spindle body 1, a shaft core 2, a wireless sensing module, a vibrator 7, and an end cover 8, wherein the wireless sensing module comprises a power receiving module 23 and a power supply module 24 which are arranged opposite to each other;

[0029] An axis core 2 is arranged in the spindle body 1, and a vibrator 7 is arranged at the end of the axis core 2; a wireless sensing module is arranged in the spindle body 1 and on the outer peripheral surface of the axis core 2, and the power receiving module 23 and the power supply module 24 are arranged in sequence and spaced apart along the radial direction of the axis core 2; an end cover 8 is arranged at the end of the spindle body 1, and the end cover 8 corresponds to the position of the vibrator 7 and has a clearance fit; the spindle has an air cooling structure for connecting cooling gas to cool the wireless sensing module.

[0030] Specifically, the inner cavity of the vibrator 7 is used to install the tool handle, the power receiving module 23 is connected to the vibrator 7, and the power supply module 24 is connected to an external power supply. Wireless power transmission is achieved through the clearance fit between the power receiving module 23 and the power supply module 24. The front bearing group 3 and the rear bearing group 4 are relatively arranged in the spindle body 1 and on the outer peripheral surface of the shaft core 2. The front bearing group 3 and the rear bearing group 4 are located on both sides of the wireless sensing module, so that the overall structure of the spindle is compact and has good rigidity and stability, thereby ensuring the reliability of the overall operation of the spindle.

[0031] Furthermore, a radial vent hole 101 is provided on the side wall of the spindle body 1, and a first axial vent hole 102 and a second axial vent hole 103 communicating with the radial vent hole 101 are provided in the axial direction ( Figure 2 As shown in ), it is convenient for external cooling gas to enter and also for cooling gas to flow in the spindle body 1; the first axial vent hole 102 is connected to the inner cavity of the end cover 8, and the second axial vent hole 103 is connected to the gap in the wireless sensing module.

[0032] Furthermore, the air cooling structure is connected to an air source for air curtain sealing of the spindle unit, that is, the radial air vents 101 are connected to the air curtain sealing air source.

[0033] Specifically, an air pipe joint 11 is provided on the radial vent hole 101, and a cooling air source or an air curtain sealing air source is connected through the air pipe joint 11. The gas introduced by the air curtain sealing air source not only seals the main shaft but also serves as cooling gas, and the wireless sensing module can be air-cooled, that is, no additional air path is needed. After the cooling gas passes through the radial vent hole 101, it is divided into two paths, namely, entering the first axial vent hole 102 and the second axial vent hole 103 respectively. The cooling gas in the first axial vent hole 10 passes through the inner cavity of the main shaft body 1 and the end cover 8, and the gap between the end cover 8 and the shaft core 2 and the vibrator 7 in turn; the cooling gas in the second axial vent hole 103 enters the gap in the wireless sensing module (that is, the gap between the power receiving module 23 and the power supply module 24), thereby realizing the cooling of the wireless sensing module.

[0034] Furthermore, the power receiving module 23 includes a power receiving shell 231 arranged on the outer peripheral surface of the shaft core 2 and a power receiving unit 232 arranged in the power receiving shell 231. The power supply module 24 includes a power supply shell 241 connected to the inner wall of the spindle body 1 and a power supply unit 242 arranged in the power supply shell 241. The gap between the power receiving unit 232 and the power supply unit 242 is connected to the second axial vent 103, which facilitates the cooling gas to enter the gap between the power receiving unit 232 and the power supply unit 242 from the second axial vent 103, thereby cooling the wireless sensing module and ensuring the reliability of energy transmission.

[0035] In other embodiments of the utility model, ventilation grooves may also be provided on the periphery of the power supply shell 241 in the power supply module 24. The ventilation grooves may be annular grooves, spiral grooves or elongated grooves. The ventilation grooves are connected to the second axial ventilation holes 103, and the wireless sensing module can also be cooled.

[0036] For further information, see Figures 3 to 5As shown, the ventilation groove on the outer peripheral surface of the power supply shell 241 adopts an annular groove 244, and a radial groove 243 is arranged on the end face of the power supply shell 241. The radial groove 243 is connected to the annular groove 244 and the inner cavity of the power supply shell 241 respectively, that is, the cooling gas between the power receiving unit 232 and the power supply unit 242 enters the radial groove 243 and is stored in the annular groove 244, which further cools the wireless sensing module and facilitates the cooling gas to be discharged from the spindle body 1.

[0037] Specifically, the radial grooves 243 are evenly arranged along the circumference of the power supply shell 241, respectively connecting the annular groove 244 and the inner cavity of the power supply shell 241, so that the cooling gas can be evenly distributed and enter the annular groove 244 respectively, thereby ensuring the working reliability of the overall structure of the spindle unit.

[0038] Furthermore, an exhaust channel 104 is also provided on the spindle body 1, and the exhaust channel 104 is respectively connected to the gap inside the wireless sensing module (i.e., between the power receiving unit 232 and the power supply unit 242) or / and the ventilation groove on the outer periphery of the power supply shell 241, so as to facilitate the discharge of excess cooling gas from the spindle body 1.

[0039] Furthermore, an inner spacer 13 and an outer spacer 12 are relatively arranged in the spindle body 1. The inner spacer 13 and the outer spacer 12 are also arranged at radial intervals along the shaft core 2, and are respectively used to limit the power receiving module 23 and the power supply module 24 to ensure the installation stability and working reliability of the overall structure of the spindle unit; the cavity between the inner spacer 13 and the outer spacer 12 is connected to the gap in the wireless sensing module and the exhaust channel 104.

[0040] Furthermore, the outer spacer ring 12 is provided with an outer ring groove (not shown in the figure) connected to the exhaust channel 104, and an outer ring radial groove 121 connected to the outer ring groove is provided. The outer ring radial groove 121 is also connected to the cavity between the inner spacer ring 13 and the outer spacer ring 12, so as to facilitate the flow of cooling gas and discharge of the spindle unit.

[0041] The radially powered air-cooled spindle unit provided by the utility model can reduce the overall axial size of the spindle unit by arranging the power receiving module 23 and the power supply module 24 opposite to and spaced apart in the radial direction of the shaft core 2, thereby facilitating the installation and replacement of the spindle unit as a whole; in addition, by arranging an air cooling structure, the air cooling structure includes radial air vents 101, first axial air vents 102, second axial air vents 103, and air grooves, annular grooves 244, radial grooves 243, etc. of the power supply shell 241, and the air cooling structure is connected to the air curtain sealing air source, without the need to add an additional air path, and can realize cooling of the wireless sensing module, thereby ensuring the reliability of the overall operation of the spindle unit.

[0042] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A radially powered air-cooled spindle unit, characterized in that: It comprises a main shaft body, a shaft core, and a wireless sensing module, wherein the shaft core is arranged in the main shaft body, and the wireless sensing module is arranged in the main shaft body and on the outer peripheral surface of the shaft core; The wireless sensing module comprises a power receiving module and a power supply module which are arranged opposite to each other, and the power receiving module and the power supply module are arranged at intervals along the radial direction of the shaft core; the spindle unit has an air cooling structure for passing cooling gas to cool the wireless sensing module.

2. The radially powered air-cooled spindle unit according to claim 1, characterized in that: The air cooling structure is connected to an air source for performing air curtain sealing on the spindle unit.

3. The radially powered air-cooled spindle unit according to claim 1, characterized in that: It also includes a vibrator and an end cover. The vibrator is arranged at the end of the shaft core; the end cover is arranged at the end of the main shaft body, and the end cover corresponds to the position of the vibrator and is clearance-matched with the vibrator.

4. The radially powered air-cooled spindle unit according to claim 3, characterized in that: A radial air vent connected to the cooling gas is arranged on the side wall of the main shaft body, and a first axial air vent and a second axial air vent connected to the radial air vent are axially arranged; the first axial air vent is connected to the inner cavity of the end cover, and the second axial air vent is connected to the wireless sensing module.

5. The radially powered air-cooled spindle unit according to claim 4, characterized in that: The power receiving module includes a power receiving shell arranged on the outer peripheral surface of the shaft core and a power receiving unit arranged in the power receiving shell. The power supply module includes a power supply shell connected to the inner wall of the main shaft body and a power supply unit arranged in the power supply shell. A gap is formed between the power receiving unit and the power supply unit, and the gap or / and the outer periphery of the power supply shell are connected to the second axial vent.

6. The radially powered air-cooled spindle unit according to claim 5, characterized in that: A ventilation groove is arranged on the outer peripheral surface of the power supply shell, and a radial groove is arranged on the end surface of the power supply shell, and the radial grooves are respectively connected with the ventilation groove and the inner cavity of the power supply shell.

7. The radially powered air-cooled spindle unit according to claim 6, characterized in that: The main shaft body is also provided with an exhaust channel, and the exhaust channel is communicated with the gap and the ventilation groove in the wireless sensing module.

8. The radially powered air-cooled spindle unit according to any one of claims 1 to 7, characterized in that: An inner spacer and an outer spacer are relatively arranged in the main shaft body. The inner spacer and the outer spacer are arranged at intervals along the radial direction of the shaft core and respectively limit the power receiving module and the power supply module.

9. The radially powered air-cooled spindle unit according to claim 8, characterized in that: The outer spacer is provided with an outer ring groove connected with the exhaust channel, and an outer ring radial groove connected with the outer ring groove, and the outer ring radial groove is also connected with the cavity between the inner spacer and the outer spacer.

10. The radially powered air-cooled spindle unit according to claim 1, characterized in that: A front bearing group and a rear bearing group are relatively arranged in the main shaft body and on the outer peripheral surface of the shaft core. The front bearing group and the rear bearing group are located on both sides of the wireless sensing module.

Images