Ultrasonic motorized spindle unit

Abstract

The utility model relates to the technical field of machining, and discloses an ultrasonic motorized spindle unit which comprises a machine body and a spindle core arranged in the machine body, a vibrator is contained in an inner cavity of the end of the spindle core, a cutter handle is arranged in an inner cavity of the vibrator, a pull rod is arranged in an inner cavity of the spindle core, and the pull rod is matched with the cutter handle. An energy transmission assembly is arranged on the periphery of the end part of the shaft core, and the energy transmission assembly corresponds to the vibrator in position; and the connecting flange at the periphery of the vibrator is connected and matched with the end part of the shaft core. The rigidity of the whole structure of the main shaft can be improved, and the reliability of energy transmission can also be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, and more specifically, to an ultrasonic electric spindle unit. Background Art

[0002] Ultrasonic machining is widely used in the processing of non-metallic, hard and brittle materials that are difficult to process, as well as in the processing of tiny holes and deep holes, because the tool tip has ultrasonic energy.

[0003] In most current ultrasonic spindle designs, the energy transmission component is located at the rear end of the shaft core, occupying space within the tool-striking mechanism and impacting the effectiveness of automatic tool changes. While some spindle designs place the energy transmission component at the front end of the ultrasonic spindle, the vibrator and the shaft core are not properly isolated, resulting in a significant amount of ultrasonic energy leaking from the bearings and shaft core. In some ultrasonic spindles, the vibrator is placed inside the tool handle, increasing the cost of the tool handle and resulting in limited versatility and poor dynamic mechanical properties. This increases the overhang and the mass of the overhang, leading to decreased natural frequency and stiffness of the spindle. Summary of the Invention

[0004] The purpose of the utility model is to provide an ultrasonic electric spindle unit to address the technical problems existing in the prior art, which can improve the rigidity of the overall structure of the spindle and ensure the reliability of energy transmission.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is:

[0006] The utility model provides an ultrasonic electric spindle unit, comprising a body, a shaft core arranged in the body, an inner cavity at the end of the shaft core accommodating a vibrator, a tool handle being arranged in the inner cavity of the vibrator, a pull rod being arranged in the inner cavity of the shaft core, and the pull rod being matched with the tool handle;

[0007] An energy transmission component is provided on the outer periphery of the end of the shaft core, and the position of the energy transmission component corresponds to the position of the vibrator; and a connecting flange on the outer periphery of the vibrator is connected and matched with the end of the shaft core.

[0008] Furthermore, the energy transmission component includes a primary component and a secondary component arranged along the radial direction of the shaft core, the secondary component is arranged on the outer periphery of the shaft core and corresponds to the position of the vibrator; the primary component and the secondary component are arranged at intervals.

[0009] Furthermore, a front end flange is provided at the end of the body, and a primary side assembly is provided on the inner side of the front end flange; a protective cover is provided at the end of the front end flange, and a limiting protrusion acting on the primary side assembly is provided on the protective cover.

[0010] Furthermore, elastic pads are respectively provided between the two sides of the primary shell of the primary assembly and the limiting protrusions of the protective cover and the inner wall of the body.

[0011] Furthermore, the connecting flange is embedded in the inner cavity of the end portion of the shaft core, and opposite ends of the connecting flange extend axially to form a first connecting portion and a second connecting portion that abut against the inner wall of the shaft core.

[0012] Furthermore, a mounting boss is provided on the outer periphery of the shaft core, one side of the secondary side shell in the secondary side assembly abuts against the mounting boss, and a locking piece is provided on the other side of the secondary side shell opposite thereto.

[0013] Furthermore, a plurality of locking bosses are provided on the end surface of the locking member, and gaps are formed between adjacent locking bosses.

[0014] Furthermore, a sleeve-jointed protrusion is formed on the periphery of the connecting flange, and the sleeve-jointed protrusion is arranged on the periphery of the end of the shaft core. The end of the sleeve-jointed protrusion abuts against one side of the secondary shell, and a limit block is provided on the other side of the secondary shell.

[0015] Furthermore, a wire hole is provided on the shaft core for passing the connecting wire between the secondary coil and the vibrator; and sealant is provided in the wire hole.

[0016] Furthermore, a motor stator and a motor rotor are relatively arranged in the machine body and on the outer periphery of the shaft core, and a cooling water jacket is provided between the motor stator and the machine body.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model arranges the energy transmission component at the end of the shaft core to reduce the distance between the energy transmission component and the vibrator, thereby avoiding the problems of difficulty in deep hole processing of the shaft core and occupying the space at the tail end of the main shaft; in addition, the connecting flange of the vibrator is connected to the shaft core, which improves the connection stiffness between the vibrator and the shaft core and can prevent the ultrasonic energy generated by the vibrator from leaking from other parts, thereby improving the energy transmission efficiency and the working reliability of the overall structure of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the solutions in the present invention, 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 present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0020] Figure 1 This is a structural diagram of Example 1 of the ultrasonic electric spindle unit in the present utility model.

[0021] Figure 2This is another structural schematic diagram of Example 1 of the ultrasonic electric spindle unit in the present invention.

[0022] Figure 3 It is a schematic diagram of the local structure A of the ultrasonic electric spindle unit in the present invention.

[0023] Figure 4 It is a structural schematic diagram of the protective cover in the utility model.

[0024] Figure 5 It is a structural diagram of the locking component in the utility model.

[0025] Figure 6 It is a structural diagram of the original side shell of the utility model.

[0026] Figure 7 This is a structural diagram of Example 2 of the ultrasonic electric spindle unit in the present utility model.

[0027] Among them, 1-body, 2-shaft core, 3-oscillator, 4-tool handle, 5-energy transmission component, 6-front end flange, 7-pull rod, 8-body jacket, 9-protective cover, 91-limiting protrusion, 10-elastic pad, 11-connecting wire, 12-motor stator, 13-motor rotor, 14-cooling water jacket, 21-wire hole, 22-sealant, 23-mounting boss, 31-connecting flange, 51-primary side assembly, 52-secondary side assembly, 511-primary side shell, 512-primary side coil, 521-secondary side shell, 522-secondary side coil, 53-locking glue, 54-locking piece, 55-limiting block, 311-first connecting part, 312-second connecting part, 321-sleeving protrusion. DETAILED DESCRIPTION

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains; the terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this invention; for example, terms such as “length,” “width,” “up,” “down,” “left,” “right,” “front,” “back,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside” indicate directions or positions based on those shown in the accompanying drawings, which are for ease of description only and are not to be construed as limiting this technical solution.

[0029] The terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions; the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In the specification and claims of the present invention and the above-mentioned drawings, when an element is referred to as being "fixed on" 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 being "connected to" another element, it may be directly or indirectly connected to the other element.

[0030] Furthermore, references to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] See Figures 1 to 3 As shown, the utility model provides an ultrasonic electric spindle unit, including a body 1, an axis core 2 arranged in the body 1, the end cavity of the axis core 2 accommodates a vibrator 3, the inner cavity of the vibrator 3 is provided with a tool handle 4, and the inner cavity of the axis core 2 is provided with a pull rod 7, and the pull rod 7 cooperates with the tool handle 4 for positioning and tool changing operations.

[0032] An energy transmission component 5 is provided on the outer periphery of the end of the shaft core 2 , and the position of the energy transmission component 5 corresponds to that of the vibrator 3 ; a connecting flange 31 on the outer periphery of the vibrator 3 is connected and matched with the end of the shaft core 2 .

[0033] In this embodiment, the energy transmission component 5 is arranged on the outer periphery of the end of the shaft core 2, corresponding to the position of the vibrator 3 and connected through a wire. This can shorten the distance between the vibrator 3 and the energy transmission component 5, avoid processing a longer wire hole on the shaft core 2, and make the wire connecting the vibrator 3 and the energy transmission component 5 need to pass through the wire hole of the shaft core 2, affecting the structural rigidity of the shaft core 2, and leaving sufficient space for the automatic tool changing structure at the tail end of the body 1.

[0034] Furthermore, the energy transmission component 5 includes a primary component 51 and a secondary component 52 arranged radially along the shaft core 2, and the secondary component 52 is arranged on the outer periphery of the shaft core 2 and corresponds to the position of the vibrator 3; the primary component 51 and the secondary component 52 are arranged at intervals, which can realize wireless transmission of ultrasonic energy.

[0035] It is understood that in other embodiments, the primary assembly 51 and the secondary assembly 52 can be arranged along the axial direction of the shaft core 2 to achieve wireless energy transmission. In this embodiment, for ease of installation and positioning, the secondary assembly 52 is first installed on the outer periphery of the shaft core 2 and rotates with the shaft core 2. The primary assembly 51 and the secondary assembly 52 are opposite to each other and have a clearance fit, which facilitates ensuring efficient energy transmission between the two.

[0036] Furthermore, a front end flange 6 is provided at the end of the body 1, and a primary side component 51 is provided on the inner side of the front end flange 6 to facilitate the installation of the primary side component 51; a protective cover 9 is provided at the end of the front end flange 6 to limit and protect the installation of the primary side component 51.

[0037] Specifically, the body 1 and the front flange 6 can be integrally formed. To facilitate installation, the end of the body 1 is provided with the front flange 6 and a body cover 8. The body cover 8 is disposed around the outer periphery of the end of the body 1 and abuts against the front flange 6. By aligning the secondary assembly 52 with the vibrator 3, the distance between the vibrator 3 and the secondary assembly 52 is minimized, thereby reducing the difficulty of machining the shaft core 2.

[0038] Furthermore, the protective cover 9 is provided with a limiting protrusion 91 ( Figure 4 ), which is used to limit the primary housing 511 in the primary assembly 51 and facilitate the control of the relative positions of the primary assembly 51 and the secondary assembly 52.

[0039] Furthermore, elastic pads 10 are respectively provided between the two sides of the primary shell 511 and the limiting protrusions 91 of the protective cover 9 and the inner wall of the body 1, which can further control the relative positions of the primary component 51 and the secondary component 52 in the axial direction, and avoid misalignment between the two, which leads to a decrease in the electromagnetic induction transmission efficiency.

[0040] Specifically, the primary side component 51 includes a primary side shell 511 and a primary side coil 512 arranged in the primary side shell 511, and the primary side coil 512 is connected to an external ultrasonic power supply; the secondary side component 52 includes a secondary side shell 521 and a secondary side coil 522 arranged in the secondary side shell 521. The positions of the primary side coil 512 and the secondary side coil 522 correspond to each other, and the secondary side coil 522 is connected to the vibrator 3 to ensure the reliability of energy transmission.

[0041] In one embodiment of the present invention, Figure 2 As shown in , the connecting flange 31 is embedded in the inner cavity of the end portion of the shaft core 2 and abuts against the inner wall of the shaft core 2. The opposite ends of the connecting flange 31 extend axially to form a first connecting portion 311 and a second connecting portion 312, which respectively abut against the inner wall of the shaft core 2 to improve the connection rigidity.

[0042] Specifically, the cross-section of the connecting flange 31 of the vibrator 3 is a T-shaped structure. The connecting flange 31 is embedded in the inner cavity of the shaft core 2 and is provided with a first connecting portion 311 and a second connecting portion 312 with the same structure, which respectively abut against the mating surface of the shaft core 2, thereby increasing the axial contact area between the shaft core 2 and the connecting flange 31, thereby improving the connection stability between the shaft core 2 and the vibrator 3, and preventing the ultrasonic energy generated by the vibrator 3 from leaking from other parts.

[0043] Furthermore, a mounting boss 23 is provided on the outer periphery of the shaft core 2, one side of the secondary side shell 521 abuts against the mounting boss 23 and is provided with a locking glue 53, and the other side is provided with a locking piece 54, which can ensure the reliability of the installation and positioning of the secondary side component 52.

[0044] Specifically, since the secondary side assembly 52 rotates at high speed along with the shaft core 2, in order to prevent the secondary side assembly 52 from loosening or falling off during rotation, locking glue 53 and locking pieces 54 are respectively provided on the opposite sides of the secondary side shell 521. The locking pieces 54 can adopt fixing parts such as locking nuts to improve the stability of the installation and positioning of the secondary side assembly 52 on the shaft core 2, and can also further control the relative position of the primary side shell 511 and the secondary side shell 521 in the axial direction.

[0045] Furthermore, the shaft core 2 is provided with a wire hole 21 for passing the connecting wire 11 between the secondary coil 522 and the vibrator 3, thereby reducing the length of the connecting wire 11. A sealant 22 is provided in the wire hole 21 to seal the structure of the shaft core 2.

[0046] Furthermore, a plurality of locking bosses 541 ( Figure 5 ), used to limit the secondary side housing 521.

[0047] As will be appreciated, multiple locking bosses 541 are provided on the locking member 54, arranged circumferentially. Gaps are formed between adjacent locking bosses 541, which improves the reliability of retaining the secondary housing 521 and facilitates the passage of the connecting wire 11 between the secondary coil 522 and the vibrator 3. One end of the connecting wire 11 is connected to the primary coil 512, while the other end passes through the gap between the secondary housing 521 and the locking bosses 541, then through the wire hole 21 and connects to the vibrator 3, ensuring reliable energy transmission.

[0048] Specifically, the primary housing 511 is also provided with a wire slot 501 ( Figure 6 As shown in FIG, the primary coil 512 is also connected to the external ultrasonic power supply through a wire. The wire groove 501 can adopt an elliptical structure to facilitate the wire to pass through and to store excess wire.

[0049] In another embodiment of the present invention, Figure 7As shown in the figure, a socket protrusion 321 is formed on the outer periphery of the connecting flange 31, and the socket protrusion 321 is arranged on the outer periphery of the end of the shaft core 2. The end of the socket protrusion 321 abuts against one side of the secondary side shell 521, and a limit block 55 is provided on the other side of the secondary side shell 521.

[0050] Specifically, by connecting the flange 31 and the outer periphery of the end of the shaft core 2, the structure of the end of the shaft core 2 can be simplified and the size of the end of the shaft core 2 can be reduced. While the sleeve protrusion 321 cooperates with the shaft core 2, the secondary side shell 521 can be abutted and limited, and the structure is simple and the installation and cooperation are reliable. It can be understood that the limit block 55 can be an integral structure with the shaft core 2, that is, the outer periphery of the shaft core 2 extends outward to form the limit block. The limit block 55 can also adopt an annular structure and be set on the outer periphery of the shaft core 2, both of which can play the role of limiting the secondary side shell 521.

[0051] In the present invention, a motor stator 12 and a motor rotor 13 are positioned relative to each other within the body 1 and on the outer periphery of the shaft core 2. The electronic stator 12 and motor rotor 13 cooperate to drive the shaft core 2 to rotate, thus forming the spindle unit as an ultrasonic electric spindle. It is understood that the distal end of the body 1 can also be connected to the shaft core 2 via a drive mechanism, meaning that the aforementioned spindle unit structure is also applicable to ultrasonic mechanical spindles.

[0052] In the present invention, a cooling water jacket 14 is further provided in the machine body 1. The cooling water jacket 14 is provided between the motor stator 12 and the machine body 1 and is used to cool the motor components to ensure the reliability of the overall operation of the spindle.

[0053] The above embodiments are preferred implementation methods of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. An ultrasonic electric spindle unit, characterized in that: The invention comprises a body, an axis core arranged in the body, an inner cavity at the end of the axis core accommodating a vibrator, an inner cavity of the vibrator being provided with a tool handle, and an inner cavity of the axis core being provided with a pull rod, and the pull rod being matched with the tool handle; An energy transmission component is provided on the outer periphery of the end of the shaft core, and the position of the energy transmission component corresponds to the position of the vibrator; and a connecting flange on the outer periphery of the vibrator is connected and matched with the end of the shaft core.

2. The ultrasonic electric spindle unit according to claim 1, characterized in that: The energy transmission component includes a primary component and a secondary component arranged along the radial direction of the shaft core. The secondary component is arranged on the outer periphery of the shaft core and corresponds to the position of the vibrator. The primary component and the secondary component are arranged at intervals.

3. The ultrasonic electric spindle unit according to claim 2, characterized in that: A front end flange is provided at the end of the body, and a primary side assembly is provided inside the front end flange; a protective cover is provided at the end of the front end flange, and a limiting protrusion acting on the primary side assembly is provided on the protective cover.

4. The ultrasonic electric spindle unit according to claim 3, characterized in that: Elastic pads are respectively provided between the two sides of the primary shell of the primary assembly and the limiting protrusions of the protective cover and the inner wall of the body.

5. The ultrasonic electric spindle unit according to any one of claims 2 to 4, characterized in that: The connecting flange is embedded in the inner cavity of the end portion of the shaft core, and opposite ends of the connecting flange extend axially to form a first connecting portion and a second connecting portion that abut against the inner wall of the shaft core.

6. The ultrasonic electric spindle unit according to claim 5, characterized in that: A mounting boss is provided on the outer periphery of the shaft core, one side of the secondary side shell in the secondary side assembly abuts against the mounting boss, and a locking piece is provided on the other side of the secondary side shell opposite to the secondary side shell.

7. The ultrasonic electric spindle unit according to claim 6, characterized in that: A plurality of locking bosses are provided on the end surface of the locking member, and gaps are formed between adjacent locking bosses.

8. The ultrasonic electric spindle unit according to any one of claims 2 to 4, characterized in that: The outer periphery of the connecting flange forms a sleeve convex portion, which is arranged on the outer periphery of the end of the shaft core. The end of the sleeve convex portion abuts against one side of the secondary side housing, and a limit block is provided on the other side of the secondary side housing.

9. The ultrasonic electric spindle unit according to claim 2, characterized in that: The shaft core is provided with a wire hole for passing the connecting wire between the secondary coil and the vibrator; and sealant is provided in the wire hole.

10. The ultrasonic electric spindle unit according to claim 1, characterized in that: A motor stator and a motor rotor are relatively arranged in the machine body and on the outer periphery of the shaft core, and a cooling water jacket is provided between the motor stator and the machine body.

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