Ultrasonic cutting device and machine tool

Abstract

The utility model discloses an ultrasonic cutting device and a machine tool, and relates to the technical field of ultrasonic cutting, the ultrasonic cutting device comprises a shell internally provided with a cavity and a pull rod capable of reciprocating along the axial direction of the pull rod, an energy converter, an energy converter shell and an amplitude-change pole are arranged in the cavity, the energy converter shell is provided with a containing cavity with an opening facing the front side, and the amplitude-change pole is arranged in the containing cavity. The transducer is installed at the rear end of the amplitude-change pole and arranged in the containing cavity, the front end of the transducer shell is fixedly connected with the amplitude-change pole, and the front end of the pull rod stretches into the cavity and is fixedly connected with the rear end of the transducer shell so as to drive the transducer shell, the transducer and the amplitude-change pole to synchronously move in the cavity. According to the ultrasonic cutting device, axial ultrasonic high-frequency vibration is generated through the transducer and the amplitude-change pole, so that the axial ultrasonic high-frequency vibration can be superposed on the basis of original low-frequency axial reciprocating motion of the cutter, and the cutting capacity of the ultrasonic cutting device is improved; the ultrasonic cutting device can cut thicker leather, woven cloth, non-woven fabric, paper, synthetic materials and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic cutting, in particular to an ultrasonic cutting device and a machine tool. Background Art

[0002] In the process of making leather products, leather cutting is required to cut the leather into a specified shape. Currently, most leather manufacturing companies use leather cutting machines to cut leather.

[0003] Leather cutting machines are equipped with a cutting head, which is driven by a motor to convert rotational motion into up-and-down movement to cut leather. However, traditional cutting heads are purely mechanical, using an eccentric wheel to achieve a low-frequency reciprocating up-and-down motion of the blade. This type of cutting head has a low upper limit on cutting capacity, making it difficult to increase cutting speed and frequency. Utility Model Content

[0004] The purpose of the utility model is to provide an ultrasonic cutting device, which can enhance the cutting ability of the cutting device by configuring ultrasonic components to make the tool of the cutting device generate high-frequency vibration, so as to solve the problem of low upper limit of cutting ability of existing cutting heads.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An ultrasonic cutting device includes a shell with a cavity inside and a pull rod that can reciprocate along its own axis. A transducer, a transducer housing and a variable amplitude rod are provided in the cavity. The transducer housing is provided with a accommodating cavity opening forward. The transducer is installed at the rear end of the variable amplitude rod and is provided in the accommodating cavity. The front end of the transducer housing is fixedly connected to the variable amplitude rod. The front end of the pull rod extends into the cavity and is fixedly connected to the rear end of the transducer housing to drive the transducer housing, the transducer and the variable amplitude rod to move synchronously in the cavity.

[0007] In some embodiments, the housing includes an upper shell and a lower shell that are fixedly connected; along the axial direction of the pull rod, the upper shell is located at the rear side of the lower shell.

[0008] In some embodiments, the upper shell is provided with an outer flange; and further comprises a locking member of a cylindrical structure;

[0009] The locking piece is sleeved at the connection between the upper shell and the lower shell, and is fixedly connected to the lower shell; the locking piece is provided with an inner flange located on the rear side of the outer flange, and the inner flange is provided with a plurality of first locking holes arranged through the front and rear end surfaces thereof, and a first connecting piece is provided in the first locking hole, and the first connecting piece is connected to the outer flange to lock the upper shell and the lower shell.

[0010] In some embodiments, the locking member is provided at one end close to the upper shell with a plurality of second locking holes extending through the inner and outer side walls thereof, and a second connecting member is provided in the second locking hole, and the second connecting member is connected to the outer peripheral side of the upper shell.

[0011] In some embodiments, a first collar is provided in the upper shell, and an inner side surface of the first collar is in contact with an outer peripheral surface of the pull rod to constrain radial displacement of the pull rod; and

[0012] A second ring coaxially arranged with the first ring is provided in the lower shell, and an inner side surface of the second ring is in contact with an outer peripheral surface of the amplitude transformer to constrain radial displacement of the amplitude transformer.

[0013] In some embodiments, the outer periphery of the housing is recessed to form a first step portion, an outer slip ring is sleeved on the first step portion, the outer slip ring includes a first inner ring portion and a first outer ring portion rotatably arranged on the outer periphery of the first inner ring portion, a first conductive ring sleeved on the first inner ring portion is in sliding electrical connection with a first brush mounted on the first outer ring portion; and

[0014] A wire threading channel is provided on the first step portion, and a wire threading hole is provided on the transducer housing, so that the first conductive ring can be electrically connected to the transducer through the wire threading channel and the wire threading hole.

[0015] In some embodiments, a limiting opening is provided on the outer circumference of the amplitude transformer, a limiting hole corresponding to the limiting opening is opened on the outer shell, a third connecting member is provided in the limiting hole, and the third connecting member extends into the limiting opening.

[0016] In some embodiments, an inner slip ring is provided in the cavity, the inner slip ring comprising a second inner ring portion and a second outer ring portion rotatably arranged on the outer circumference of the second inner ring portion, a second conductive ring sleeved on the second inner ring portion is in sliding electrical connection with a second brush mounted on the second outer ring portion, the second inner ring portion is fixedly connected to the transducer housing, and the second outer ring portion is fixedly connected to the outer shell; and

[0017] The second brush is electrically connected to the first conductive ring through the threading channel; the second conductive ring is electrically connected to the transducer through the threading hole.

[0018] In some embodiments, the outer slip ring has the same structure as the inner slip ring, and the outer slip ring has the following structure:

[0019] The first inner ring portion includes a first insulating block and a second insulating block, wherein the axial cross-sectional profile of the second insulating block is L-shaped, and the first insulating block and the second insulating block cooperate with each other to form an accommodating groove with an opening toward the first outer ring portion, and at least two first conductive rings arranged at intervals are provided in the accommodating groove, and the inner side surface of the first outer ring portion is provided with a boss block extending into the accommodating cavity, and the first insulating block and the second insulating block are respectively clamped at both ends of the boss block.

[0020] In some embodiments, a protective shell is fixed to the first outer ring portion, and the protective shell is rotatably connected to the outer shell.

[0021] In some embodiments, a mounting sleeve that can be driven to rotate is further included; the mounting sleeve is sleeved on the outer shell, and a limit block is provided in the mounting sleeve and located in front of the outer shell, and the amplitude changing rod extends out of the outer shell and is fixedly connected to the limit block so that the amplitude changing rod and the mounting sleeve rotate synchronously.

[0022] In some embodiments, the inner circumference of the mounting sleeve is provided with a limiting portion extending toward its interior, and the limiting block ring is provided at the front end of the mounting sleeve and fits against the front end surface of the limiting portion; the limiting block is provided with a third locking hole arranged through the front and rear end surfaces thereof, and the limiting portion is provided with a fourth locking hole corresponding to the third locking hole; the third locking hole is provided with a fourth connecting piece that can be extended into the fourth locking hole, so that the limiting block is fixedly connected to the mounting sleeve.

[0023] In some embodiments, the limit block ring is arranged in the mounting sleeve, and the outer peripheral side of the amplitude changing rod is provided with a transmission part extending outward, and the limit block is provided with a transmission hole arranged through and corresponding to the transmission part or a transmission groove opening backward, the amplitude changing rod is passed through the limit block, and the transmission part is inserted into the transmission hole or transmission groove, so that the amplitude changing rod is clamped with the limit block.

[0024] In some embodiments, a mounting hole for mounting a tool holder is provided at the front end of the amplitude changing rod, a positioning groove is provided on the side wall of the tool holder, and a first through hole extending through the mounting hole is provided on the side of the amplitude changing rod where the transmission part is provided, and a fastener that can be tightened against the positioning groove is installed in the first through hole.

[0025] In some embodiments, the mounting sleeve is provided with a second through hole corresponding to the first through hole, and the limiting block is provided with a third through hole corresponding to the first through hole.

[0026] In some embodiments, it also includes a power housing and a drive assembly, the rear end of the pull rod is arranged in the power housing, and the rear end of the outer shell is rotatably arranged in the power housing; the output end of the drive assembly extends into the power housing and is connected to the rear end of the pull rod through an eccentric structure to drive the pull rod to reciprocate along its axial direction.

[0027] Based on the aforementioned ultrasonic cutting device, the present application also provides a machine tool, which includes the aforementioned ultrasonic cutting device.

[0028] Compared with the prior art, the ultrasonic cutting device and machine tool implemented in this application have the following beneficial effects:

[0029] The ultrasonic cutting device of the present application is provided with a pull rod that can reciprocate along its own axial direction, and the pull rod drives the transducer housing to move synchronously in the cavity, so that the transducer and the amplitude rod can reciprocate along the axial direction of the pull rod, thereby enabling the tool connected to the amplitude rod to achieve axial reciprocating motion. In addition, the ultrasonic cutting device of the present application generates axial ultrasonic high-frequency vibrations through the transducer and the amplitude rod, so that the tool can superimpose axial ultrasonic high-frequency vibrations on the original low-frequency axial reciprocating motion, thereby improving the cutting ability of the ultrasonic cutting device, so that the ultrasonic cutting device can cut thicker leather, woven fabrics, non-woven fabrics, paper, synthetic materials, composite materials or plates, etc.

[0030] Moreover, the transducer shell has axial low-frequency reciprocating motion and high-frequency ultrasonic vibration relative to the outer shell, and the vibration efficiency is relatively large. The ultrasonic cutting device of the present application arranges the transducer and the transducer shell inside the outer shell, so that during operation, the ultrasonic cutting device can prevent the external world from accidentally touching the moving transducer shell through the outer shell, so as to avoid obstruction of cutting due to accidental contact with the outside world, and prevent external dust and debris from entering the accommodating cavity of the transducer shell, causing abnormal operation of the transducer.

[0031] Moreover, the ultrasonic cutting device of the present application sets a first ring and a second ring to limit the radial displacement of the pull rod, transducer housing, transducer and amplitude transformer, and sets a first connecting member and a second connecting member to limit the radial adjustment and coaxiality of the upper shell and the lower shell, making the ultrasonic cutting device more suitable for high-precision processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of an ultrasonic cutting device in an embodiment of the present application;

[0033] Figure 2 is a cross-sectional schematic diagram of an ultrasonic cutting device in an embodiment of the present application;

[0034] Figure 3 yes Figure 2 A magnified view of middle A;

[0035] Figure 4 yes Figure 2 Enlarged view of middle B;

[0036] Figure 5 yes Figure 2 Enlarged view of middle C;

[0037] Figure 6 yes Figure 2 Enlarged view of middle D;

[0038] Figure 7 yes Figure 2 Enlarged view of middle E;

[0039] Figure 8 It is a partial schematic diagram of the assembly of the amplitude rod and the tool holder in the embodiment of the present application;

[0040] Figure 9 is a partial cross-sectional schematic diagram of another example of an ultrasonic cutting device in an embodiment of the present application;

[0041] Figure 10 yes Figure 9 Enlarged view of middle F;

[0042] Figure 11 is a schematic diagram of the upper housing in an embodiment of the present application;

[0043] Figure 12 is a schematic diagram of a locking member in an embodiment of the present application;

[0044] Figure 13 is a schematic diagram of a horn in an embodiment of the present application;

[0045] Figure 14 Schematic diagram of a limit block in an embodiment of the present application;

[0046] Figure 15 is a schematic diagram of installing a sleeve in an embodiment of the present application;

[0047] Figure 16 Schematic diagram of the tool holder in the embodiment of the present application.

[0048] In the figure, 100, ultrasonic cutting device;

[0049] 1. Housing; 1a. Upper housing; 10a. Outer flange; 11a. First step; 1b. Lower housing; 2. Cavity; 3. Pull rod; 4. Transducer; 5. Transducer housing; 6. Amplitude transformer; 6a. Transmission unit; 7. Accommodation chamber; 8. Mounting sleeve; 8a. Positioning unit; 9. Positioning block; 10. Third locking hole; 11. Fourth locking hole; 12. Fourth connecting member; 13. Transmission hole; 14. Third through hole; 15. Second through hole; 16. Mounting hole; 17. Positioning slot; 18. Fastener; 19. Power housing; 20. Drive assembly; 20a. Motor; 20b. Eccentric wheel; 21. Disc; 22. Locking member; 22a. Inner flange; 23. First Locking hole; 24, first connecting piece; 25, gasket; 26, second locking hole; 27, second connecting piece; 28, first sleeve; 29, second sleeve; 30, outer slip ring; 30a, first inner ring portion; 300a, first insulating block; 301a, second insulating block; 30b, first outer ring portion; 300b, boss block; 31, threading channel; 32, threading hole; 33, limiting opening; 34, limiting hole; 35, third connecting piece; 36, inner slip ring; 36a, second outer ring portion; 36b, second inner ring portion; 37, accommodating groove; 38, first conductive ring; 39, insulating gasket; 40, protective shell; 41, tool; 42, tool holder; 43, first through hole. DETAILED DESCRIPTION

[0050] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0051] In the description of this application, it should be understood that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, it may be internal communication between two elements or an interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0052] In the description of this application, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. used in this application to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0053] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features.

[0054] Example

[0055] like Figure 1-16 As shown, an ultrasonic cutting device 100 of an embodiment of the present application includes a shell 1 with a cavity 2 inside and a pull rod 3 that can reciprocate along its own axis. A transducer 4, a transducer housing 5 and a horn 6 are provided in the cavity 2. The transducer housing 5 is provided with a accommodating cavity 7 with an opening facing the front side. The transducer 4 is installed at the rear end of the horn 6 and is arranged in the accommodating cavity 7. The front end of the transducer housing 5 is fixedly connected to the horn 6. The front end of the pull rod 3 extends into the cavity 2 and is fixedly connected to the rear end of the transducer housing 5 to drive the transducer housing 5, the transducer 4 and the horn 6 to move synchronously in the cavity 2.

[0056] It is understandable that the pull rod 3, the transducer 4, the transducer housing 5 and the amplitude converter 6 move along the same axial direction. When the pull rod 3 is driven to reciprocate along its own axial direction, the transducer housing 5 is immediately driven by the pull rod 3 and moves synchronously with the pull rod 3. Since the transducer 4 is installed at the rear end of the amplitude converter 6, and the amplitude converter 6 is fixedly connected to the front end of the transducer housing 5, the transducer housing 5 can drive the amplitude converter 6 and the transducer 4 to move synchronously, so that when the pull rod 3 is driven to reciprocate along its own axial direction, the transducer housing 5, the transducer 4 and the amplitude converter 6 will move synchronously therewith. In this way, the tool 41 is installed at the front end of the amplitude converter 6, and the tool 41 can reciprocate along the axial direction of the pull rod 3.

[0057] After the transducer 4 is driven, it can generate high-frequency ultrasonic vibrations. The ultrasonic vibrations generated by the transducer 4 can be transmitted to the tool 41 through the amplitude transformer 6, so that the tool 41 is superimposed with high-frequency ultrasonic vibrations when it performs low-frequency reciprocating motion with the pull rod 3 (the amplitude of the ultrasonic vibration can reach tens of microns, the vibration frequency can be 20K, the amplitude of the low-frequency reciprocating motion is 1mm, and the frequency is about 166r / s. This is just an example, and the amplitude and frequency can also be other values), thereby improving the cutting ability of the tool 41. In addition, the transducer housing 5 and the transducer 4 are both accommodated in the cavity 2, so that the transducer housing 5 and the transducer 4 are protected from the influence of the external environment, such as dust, debris, etc. Moreover, during the operation of the ultrasonic cutting device 100, the transducer housing 5 moves in the cavity 2, which can effectively prevent the external environment from accidentally touching and affecting the processing process.

[0058] There are many ways to achieve the fixed connection between the front end of the transducer housing 5 and the horn 6. For example, refer to Figure 2 A through hole can be provided on the outer peripheral side of the transducer housing 5, and a pin can be installed in the through hole. The pin can be used to tighten the outer peripheral side of the horn 6, so that the transducer housing 5 and the horn 6 are fixedly connected. Alternatively, a pressure cover can be provided at the front end of the transducer housing 5, and the horn 6 can be locked to the transducer housing 5 through the pressure cover.

[0059] There are various ways to achieve a fixed connection between the tie rod 3 and the rear end of the transducer housing 5. For example, the front end of the tie rod 3 can be directly extended into the cavity 2 and directly connected to the transducer housing 5. Alternatively, a connecting structure, such as a coupling, can be provided between the tie rod 3 and the transducer housing 5 to connect and fix the tie rod 3 and the transducer housing 5. In either case, the tie rod 3 and the transducer housing 5 can move synchronously.

[0060] refer to Figure 2-10 、 Figure 15-16 As an example of this embodiment, the ultrasonic cutting device 100 also includes a mounting sleeve 8 that can be driven to rotate; the mounting sleeve 8 is sleeved on the front end of the shell 1, and a limit block 9 is provided in the mounting sleeve 8 and is located in front of the shell 1. The amplitude variable rod 6 extends out of the shell 1 and is fixedly connected to the limit block 9 so that the amplitude variable rod 6 and the mounting sleeve 8 rotate synchronously.

[0061] Mounting sleeve 8 is typically fixedly mounted on the machine tool's Z-axis moving assembly, allowing it to move along the machine's Z-axis. The Z-axis moving assembly connects to the machine tool's X-axis and Y-axis moving assemblies, enabling the ultrasonic cutting device 100 to move along the X, Y, and Z axes on the machining platform. Furthermore, mounting sleeve 8 can be externally driven to rotate, thereby driving the horn 6 to rotate synchronously.

[0062] It should be noted that when changing the tool, the mounting sleeve 8 usually does not need to be removed, because the mounting sleeve 8 is provided with a limiting structure to ensure its positioning with the Z-axis moving assembly. If the mounting sleeve 8 is removed when changing the tool, the position between the mounting sleeve 8 and the Z-axis moving assembly needs to be redefined when installing the new ultrasonic cutting device 100, and the tool changing efficiency is low.

[0063] It is understood that the horn 6 is fixedly connected to the transducer housing 5, and the transducer housing 5 is fixedly connected to the pull rod 3. Rotation of the horn 6 along with the mounting sleeve 8 will also cause rotation of the transducer housing 5 and the pull rod 3. Furthermore, the mounting sleeve 8 is typically secured to the housing 1 via fasteners (not shown in the figures), so that when the mounting sleeve 8 is driven to rotate, the housing 1 will also rotate accordingly.

[0064] Generally speaking, the mounting sleeve 8 has an opening toward the front end, and the limiting block 9 can be assembled in the mounting sleeve 8 using the opening. Figure 1-15 As an example of this embodiment, the inner circumference of the mounting sleeve 8 is provided with a limiting portion 8a extending toward its interior, and the limiting block 9 is annularly arranged at the front end of the mounting sleeve 8 and fits against the front end surface of the limiting portion 8a; a third locking hole 10 is provided in the limiting block 9 and is arranged along its axial direction, and a fourth locking hole 11 corresponding to the third locking hole 10 is provided in the limiting portion 8a; a fourth connecting piece 12 is provided in the third locking hole 10 and can be extended into the fourth locking hole 11, so that the limiting block 9 and the mounting sleeve 8 are axially fixed.

[0065] Furthermore, the outer peripheral side of the horn 6 may be provided with a transmission portion 6a extending outward, and the limit block 9 is provided with a transmission hole 13 corresponding to the transmission portion 6a. The transmission hole 13 is arranged to penetrate along the axial direction of the limit block 9. The horn 6 is passed through the limit block 9, and the transmission portion 6a is inserted into the transmission hole 13, so that the horn 6 and the limit block 9 are engaged, and the mounting sleeve 8 rotates synchronously with the horn 6. Of course, a transmission groove (not shown in the figure) with a rearward opening may be provided on the limit block 9 to replace the transmission hole 13. By inserting the transmission portion 6a into the transmission groove (not shown in the figure), the engagement of the horn 6 and the limit block 9 can also be achieved.

[0066] In addition, considering the assembly of the tool holder 42, the cutter 41 and the amplitude transformer 6, the front end of the amplitude transformer 6 is provided with a mounting hole 16 for mounting the tool holder 42, the cutter 41 is mounted on the tool holder 42, and a positioning groove 17 is provided on the side wall of the tool holder 42. A first through hole 43 extending to the mounting hole 16 is provided on the side of the amplitude transformer 6 where the transmission portion 6a is provided. A fastener 18 that can be tightened against the positioning groove 17 is installed in the first through hole 43 to fix the tool holder 42 (the fastener 18 acts on the tool holder 42, and the tool holder 42 evenly distributes the thrust on the blade to achieve the fixation of the blade). In this case, when changing the blade, the housing 1 and the transducer housing 5 in the cavity 2 need to be removed from the mounting sleeve 8 together, so that the ultrasonic cutting device 100 with the new cutter can be reinstalled in the mounting sleeve 8.

[0067] Of course, a third through hole 14 can also be provided at a position on the mounting sleeve 8 corresponding to the first through hole 43, and a corresponding second through hole 15 can be provided on the stop block 9, so that the third through hole 14 on the mounting sleeve 8 communicates with the second through hole 15 on the stop block 9. The fastener 18 extends into the positioning groove 17 through the third through hole 14 on the mounting sleeve 8 and the second through hole 15 on the stop block 9. In this way, the tool can be changed with the help of the third through hole 14 on the mounting sleeve 8 and the second through hole 15 on the stop block 9 without removing the transducer 4.

[0068] refer to Figure 2-10 As an example of this embodiment, the ultrasonic cutting device 100 also includes a power housing 19 and a drive assembly 20. The rear end of the pull rod 3 is arranged in the power housing 19, and the rear end of the outer shell 1 is rotatably arranged in the power housing 19; the output end of the drive assembly 20 extends into the power housing 19 and is connected to the rear end of the pull rod 3 through an eccentric structure to drive the pull rod 3 to reciprocate along its axial direction.

[0069] The drive assembly 20 may include a motor 20a, and the eccentric structure is an eccentric wheel 20b. The output end of the motor 20a drives the pull rod 3 in the power housing 19 to perform axial reciprocating motion through the eccentric wheel 20b. A bearing may be provided on the eccentric wheel 20b to reduce the friction between the eccentric wheel 20b and the pull rod 3. As an example of a transmission structure, two spaced discs 21 may be provided at the rear end of the pull rod 3. The bearing is clamped between the two discs 21, the outer ring of the bearing is connected to the two discs 21, and the inner ring of the bearing rotates with the eccentric wheel 20b, so that when the pull rod 3 rotates with the mounting sleeve 8, the two discs 21 can rotate relative to the bearing, and when the pull rod 3 does not rotate, the outer ring of the bearing can be fixed relative to the two discs 21.

[0070] During the operation of the ultrasonic cutting device 100, the motor 20a drives the pull rod 3 to perform low-frequency axial reciprocating motion, and the pull rod 3 drives the transducer housing 5, the transducer 4, the amplitude converter 6 and the tool 41 to move synchronously, and the tool 41 performs high-frequency ultrasonic vibration under the action of the transducer 4 and the amplitude converter 6. In addition, according to the processing technology requirements, the mounting sleeve 8 can be driven to rotate by external power, so that the outer shell 1, the pull rod 3, the transducer 4 and the transducer housing 5 rotate synchronously.

[0071] refer to Figure 2-10 As an example of this embodiment, the housing 1 includes an upper shell 1a and a lower shell 1b. Both upper shell 1a and lower shell 1b are cylindrical structures. The upper shell 1a and lower shell 1b are assembled and fixedly connected to form a cavity 2. Along the axial direction of the pull rod 3, the upper shell 1a is located behind the lower shell 1b, and the front end of the horn 6 extends beyond the front end of the lower shell 1b to facilitate the installation of the tool 41.

[0072] The housing 1 employs a split structure, facilitating installation of the transducer 4, transducer housing 5, and horn 6 within the housing 1. To ensure a tight connection between the upper housing 1a and the lower housing 1b, as an example of this embodiment, the outer periphery of the upper housing 1a may be provided with an outer flange 10a extending outward. Furthermore, the ultrasonic cutting device 100 further includes a locking member 22; the locking member 22 is a cylindrical structure, and its inner periphery is provided with an inner flange 22a extending inward.

[0073] The locking member 22 is sleeved on the connection between the upper shell 1a and the lower shell 1b, and is fixedly connected to the lower shell 1b. The inner flange 22a is located on the rear side of the outer flange 10a, and is provided with a plurality of first locking holes 23 arranged along its axial direction. The number of the first locking holes 23 can be configured according to the specification parameters of the shell 1. Generally speaking, four first locking holes 23 can be configured, and the four first locking holes 23 are evenly arranged along the arrangement path of the inner flange 22a. A first connecting member 24, such as a top screw, is provided in each first locking hole 23. The first connecting member 24 is connected to the outer flange 10a to lock the upper shell 1a and the lower shell 1b. In addition, in order to reduce the friction of the first connecting member 24 on the upper shell 1a, a gasket 25 can be provided between the outer flange 10a and the inner flange 22a, so that the first connecting member 24 abuts against the gasket 25.

[0074] It is understood that the locking member 22 and the lower housing 1b can be fixedly connected in various ways. For example, the locking member 22 and the lower housing 1b can be fixed by bolts, or the locking member 22 and the lower housing 1b can be fixed by threads. Of course, fixing the locking member 22 and the lower housing 1b by threads alone may not prevent radial runout of the housing 1. Therefore, after initially locking the lower housing 1b and the locking member 22 by threads, the locking member 22 can be finally locked to the lower housing 1b using the axially arranged first connecting member 24, thereby tightly connecting the upper housing 1a and the lower housing 1b.

[0075] As an example of this embodiment, the end of the locking member 22 close to the upper shell 1a may also be provided with a plurality of second locking holes 26 arranged radially therethrough, that is, passing through the inner and outer side walls of the locking member 22, and a second connecting member 27 is provided in the second locking hole 26, and the second connecting member 27 is connected to the outer peripheral side of the upper shell 1a.

[0076] The second connecting member 27 can be a jackscrew or other similar locking structure. Four second connecting members 27 are generally provided, evenly spaced around the locking member 22. By arranging multiple second connecting members 27 around the outer periphery of the locking member 22, the radial runout of the housing 1 can be further adjusted, ensuring the coaxiality of the upper shell 1a and the lower shell 1b.

[0077] refer to Figure 2 As an example of this embodiment, a first ring 28 is provided in the upper shell 1a, and the inner surface of the first ring 28 is in contact with the outer peripheral surface of the pull rod 3 to constrain the radial displacement of the pull rod 3; and a second ring 29 is provided in the lower shell 1b, which is coaxially arranged with the first ring 28, and the inner surface of the second ring 29 is in contact with the outer peripheral surface of the variable amplitude rod 6 to constrain the radial displacement of the variable amplitude rod 6.

[0078] The accuracy of the movement of the pull rod 3 will affect the cutting accuracy of the ultrasonic cutting device 100. In order to limit the radial runout of the pull rod 3, the ultrasonic cutting device 100 is provided with a coaxially arranged first ring 28 and a second ring 29, so that the outer circumference of the pull rod 3 is in contact with the inner side of the first ring 28, and the outer circumference of the horn 6 is in contact with the inner side of the second ring 29. In this way, the ultrasonic cutting device 100 is provided with two limit points in the same direction, which define the movement direction of the pull rod 3 and the horn 6, limit the radial displacement of the pull rod 3 and the horn 6, and do not affect the rotation of the horn 6 and the pull rod 3.

[0079] In order to make the transducer 4 obtain external electrical energy, refer to Figure 2-10 、 Figure 11As an example of this embodiment, the outer circumference of the housing 1 is recessed to form a first step portion 11a, on which an outer slip ring 30 is mounted. Generally speaking, the outer slip ring 30 is located at the rear end of the transducer housing 5, so the first step portion 11a is generally formed at the rear end of the upper housing 1a. The outer slip ring 30 includes a first inner ring portion 30a and a first outer ring portion 30b that is disposed outside the first inner ring portion 30a and can rotate relative to the first inner ring portion 30a. A first conductive ring 38 is mounted on the first inner ring portion 30a, and a first brush (not shown) is mounted on the first outer ring portion 30b. The first brush is electrically connected to the first conductive ring 38 by sliding, and the first inner ring portion 30a is fixedly connected to the housing 1. In addition, a wire passage 31 is defined on the first step portion 11a, and a wire hole 32 is defined on the transducer housing 5, allowing the first conductive ring 38 to be electrically connected to the transducer 4 through the wire passage 31 and the wire hole 32.

[0080] The first brush of the outer slip ring 30 can be connected to an external ultrasonic generator by means of a wire connection, so that the transducer 4 can obtain electrical energy and convert the electrical energy into mechanical energy, which is then transmitted to the tool 41 through the amplitude rod 6 to achieve ultrasonic vibration.

[0081] It should be noted that a bearing is typically disposed between the pull rod 3 and the housing 1, allowing the pull rod 3 and transducer housing 5 to rotate relative to the housing 1 before the mounting sleeve 8 is assembled. In this case, if the first conductive ring 38 is directly electrically connected to the transducer 4 via a wire, the wires may become entangled, hindering assembly of the ultrasonic cutting device 100. To address this issue, consider providing indirect electrical connection between the first conductive ring 38 and the transducer 4, or preventing the transducer housing 5 from rotating relative to the housing 1.

[0082] refer to Figure 1-10 As an example of this embodiment, a limiting opening 33 is provided on the outer peripheral side of the amplitude transformer 6, and a limiting hole 34 corresponding to the limiting opening 33 is opened on the lower shell 1b of the shell 1. A third connecting member 35 is provided in the limiting hole 34, and the third connecting member 35 extends into the limiting opening 33 to limit the relative rotation of the amplitude transformer 6 and the shell 1.

[0083] The relative position of the amplitude transformer 6 and the housing 1 in the circumferential direction is limited by the third connecting member 35, and the amplitude transformer 6 is connected and fixed to the transducer housing 5, so that the amplitude transformer 6, the transducer housing 5 and the housing 1 rotate synchronously. In this case, the first inner ring portion 30a fixedly connected to the housing 1 will also rotate synchronously with the transducer housing 5. In this way, no relative rotation will occur between the first inner ring portion 30a and the transducer housing 5. Even if the first conductive ring 38 and the transducer housing 5 are directly connected by a wire, the wire between the two will not be entangled due to the relative rotation.

[0084] Furthermore, in the example where the stop block 9 is used to limit the rotation of the horn 6 with the mounting sleeve 8, since the front end of the horn 6 is close to the cutter 41, the ultrasonic amplitude at this position is large, and the front end of the horn 6 contacts the stop block 9, resulting in large ultrasonic vibration losses at this position. By limiting the relative circumferential position of the horn 6 and the housing 1 by the third connecting member 35, the front end of the horn 6 and the stop block 9 are no longer required to cooperate, thereby reducing vibration losses at the front end of the horn 6.

[0085] refer to Figure 2-10 As an example of this embodiment, an inner slip ring 36 is provided in the cavity 2, and the inner slip ring 36 includes a second outer ring portion 36a, a second inner ring portion 36b arranged in the second outer ring portion 36a and rotatable relative to the second outer ring portion 36a, the second outer ring portion 36a is fixedly connected to the outer shell 1, and the second inner ring portion 36b is connected to the transducer housing 5; and a second brush (not shown in the figure) is installed on the second outer ring portion 36a, which is electrically connected to the first conductive ring 38 on the first inner ring portion 30a through the threading channel 31; a second conductive ring is sleeved on the second inner ring portion 36b, which is electrically connected to the transducer 4 through the threading hole 32, and the second brush is electrically connected to the second conductive ring in a sliding manner.

[0086] The inner slip ring 36 enables indirect electrical connection between the outer slip ring 30 and the transducer 4. Because the second outer ring portion 36a can rotate relative to the second inner ring portion 36b, even if relative rotation occurs between the first inner ring portion 30a and the transducer housing 5, the transducer housing 5 will only drive the second inner ring portion 36b to rotate, and will not drive the second outer ring portion 36a to rotate. In this way, direct electrical connection can be established between the first conductive ring 38 and the second brush via a wire, and between the second conductive ring and the transducer 4 via a wire, thereby achieving electrical connection between the transducer 4 and the outer slip ring 30.

[0087] refer to Figure 5 As an example of this embodiment, the structure of the outer slip ring 30 is the same as that of the inner slip ring 36. The structure of the outer slip ring 30 is described as an example: the first inner ring portion 30a includes a first insulating block 300a and a second insulating block 301a, wherein the axial cross-sectional profile of the second insulating block 301a is L-shaped. Furthermore, the first insulating block 300a and the second insulating block 301a cooperate with each other to form an accommodating groove 37 opening toward the first outer ring portion 30b. The accommodating groove 37 is provided with two first conductive rings 38 spaced apart from each other, and an insulating gasket 39 is provided between the two spaced apart first conductive rings 38 to separate them. The first outer ring portion 30b is provided with a boss block 300b extending toward the first inner ring portion 30a and into the accommodating cavity 7. The second insulating block 301a and the first insulating block 300a are respectively connected to the axial ends of the boss block 300b.

[0088] Both the first outer ring portion 30b and the second outer ring portion 36a may be provided with brush wire holes to install brushes and ensure that the corresponding brushes are in contact with the conductive rings in the first inner ring portion 30a and the second inner ring portion 36b.

[0089] It should be noted that when the transducer housing 5 reciprocates with the pull rod 3, the inner slip ring 36 does not reciprocate with the transducer housing 5. In the axial direction of the pull rod 3, the friction coefficient between the second inner ring portion 36b and the transducer housing 5 is small, and the two can slide relative to each other.

[0090] Considering that the outer slip ring 30 is arranged outside the housing 1 and is exposed to the external environment. In order to provide a certain degree of protection for the outer slip ring 30, refer to Figure 2 As an example of this embodiment, a protective housing 40 may be fixed to the first outer ring portion 30b; the protective housing 40 encloses the first outer ring portion 30b and is rotatably connected to the housing 1. The protective housing 40 may be fixedly connected to the power housing 19, and the first brush is fixed to the protective housing 40, allowing for easy lead-out of wires for connection to the ultrasonic generator.

[0091] Based on the aforementioned ultrasonic cutting device 100 , this embodiment further provides a machine tool, which includes the aforementioned ultrasonic cutting device 100 and can achieve the effects of the aforementioned ultrasonic cutting device 100 .

[0092] In summary, this embodiment provides an ultrasonic cutting device 100 and a machine tool. By providing a pull rod 3 capable of axial reciprocating motion, and enabling the pull rod 3 to drive the transducer housing 5 to synchronously move within the cavity 2, the transducer 4 and the horn 6 can reciprocate axially along the pull rod 3, thereby enabling the tool 41 connected to the horn 6 to achieve axial reciprocating motion. Furthermore, the ultrasonic cutting device 100 of this embodiment generates axial ultrasonic high-frequency vibrations through the transducer 4 and the horn 6, enabling the tool 41 to superimpose axial ultrasonic high-frequency vibrations on the original low-frequency axial reciprocating motion, thereby improving the cutting capability of the ultrasonic cutting device 100 and enabling the ultrasonic cutting device 100 to cut thicker leather or plate materials, for example.

[0093] Moreover, the ultrasonic cutting device 100 of this embodiment arranges the transducer 4 and the transducer housing 5 inside the housing 1, so that during operation, the ultrasonic cutting device 100 can prevent the outside from accidentally touching the moving transducer housing through the housing 1, and prevent external dust and debris from entering the accommodating cavity 7 of the transducer housing 5, causing abnormal operation of the transducer 4.

[0094] Moreover, the ultrasonic cutting device 100 of this embodiment limits the radial displacement of the pull rod 3, the transducer housing 5, the transducer 4 and the amplitude transformer 6 by setting the first ring 28 and the second ring 29, and limits the radial runout and coaxiality of the upper housing 1a and the lower housing 1b by setting the first connecting member 24 and the second connecting member 27, so that the ultrasonic cutting device 100 is more suitable for high-precision processing.

[0095] This embodiment further provides a machine tool, which includes the aforementioned ultrasonic cutting device 100 and can achieve the effects of the aforementioned ultrasonic cutting device 100.

[0096] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present application. These improvements and replacements should also be regarded as the scope of protection of the present application.

Claims

1. An ultrasonic cutting device, characterized in that: It includes a shell with a cavity inside and a pull rod that can reciprocate along its own axis. A transducer, a transducer shell and a variable amplitude rod are arranged in the cavity. The transducer shell is provided with a accommodating cavity opening forward. The transducer is installed at the rear end of the variable amplitude rod and is arranged in the accommodating cavity. The front end of the transducer shell is fixedly connected to the variable amplitude rod. The front end of the pull rod extends into the cavity and is fixedly connected to the rear end of the transducer shell to drive the transducer shell, the transducer and the variable amplitude rod to move synchronously in the cavity.

2. The ultrasonic cutting device according to claim 1, characterized in that The housing comprises an upper shell and a lower shell which are fixedly connected; along the axial direction of the pull rod, the upper shell is located at the rear side of the lower shell.

3. The ultrasonic cutting device according to claim 2, characterized in that: The upper shell is provided with an outer flange; and further comprises a locking member of a cylindrical structure; The locking piece is sleeved at the connection between the upper shell and the lower shell, and is fixedly connected to the lower shell; the locking piece is provided with an inner flange located on the rear side of the outer flange, and the inner flange is provided with a plurality of first locking holes arranged through the front and rear end surfaces thereof, and a first connecting piece is provided in the first locking hole, and the first connecting piece is connected to the outer flange to lock the upper shell and the lower shell.

4. The ultrasonic cutting device according to claim 3, characterized in that: A plurality of second locking holes are provided on one end of the locking member close to the upper shell, and are arranged through the inner and outer side walls thereof. A second connecting member is provided in the second locking hole, and the second connecting member is connected to the outer peripheral side of the upper shell.

5. The ultrasonic cutting device according to claim 2, characterized in that: A first collar is provided in the upper shell, the inner side of the first collar is in contact with the outer peripheral surface of the pull rod to constrain the radial displacement of the pull rod; and A second ring coaxially arranged with the first ring is provided in the lower shell, and an inner side surface of the second ring is in contact with an outer peripheral surface of the amplitude transformer to constrain radial displacement of the amplitude transformer.

6. The ultrasonic cutting device according to claim 1, characterized in that: The outer periphery of the housing is recessed to form a first step portion, an outer slip ring is sleeved on the first step portion, the outer slip ring includes a first inner ring portion and a first outer ring portion rotatably arranged on the outer periphery of the first inner ring portion, a first conductive ring sleeved on the first inner ring portion is in sliding electrical connection with a first brush mounted on the first outer ring portion; and A wire threading channel is provided on the first step portion, and a wire threading hole is provided on the transducer housing, so that the first conductive ring can be electrically connected to the transducer through the wire threading channel and the wire threading hole.

7. The ultrasonic cutting device according to claim 6, characterized in that: A limiting opening is provided on the outer circumference of the amplitude transformer, a limiting hole corresponding to the limiting opening is opened on the shell, a third connecting member is provided in the limiting hole, and the third connecting member extends into the limiting opening.

8. The ultrasonic cutting device according to claim 6, characterized in that: An inner slip ring is provided in the cavity, the inner slip ring comprising a second inner ring portion and a second outer ring portion rotatably arranged on the outer circumference of the second inner ring portion, a second conductive ring sleeved on the second inner ring portion is in sliding electrical connection with a second brush mounted on the second outer ring portion, the second inner ring portion is fixedly connected to the transducer housing, and the second outer ring portion is fixedly connected to the outer shell; and The second brush is electrically connected to the first conductive ring through the threading channel; the second conductive ring is electrically connected to the transducer through the threading hole.

9. The ultrasonic cutting device according to claim 8, characterized in that: The outer slip ring has the same structure as the inner slip ring, and the outer slip ring adopts the following structure: The first inner ring portion includes a first insulating block and a second insulating block, wherein the axial cross-sectional profile of the second insulating block is L-shaped, and the first insulating block and the second insulating block cooperate with each other to form an accommodating groove with an opening toward the first outer ring portion, and at least two first conductive rings arranged at intervals are provided in the accommodating groove, and the inner side surface of the first outer ring portion is provided with a boss block extending into the accommodating cavity, and the first insulating block and the second insulating block are respectively clamped at both ends of the boss block.

10. The ultrasonic cutting device according to claim 6, characterized in that: A protective shell is fixed on the first outer ring portion, and the protective shell is rotatably connected to the outer shell.

11. The ultrasonic cutting device according to claim 1, characterized in that: It also includes a mounting sleeve that can be driven to rotate; the mounting sleeve is sleeved on the outer shell, and a limit block is provided in the mounting sleeve and located in front of the outer shell. The amplitude changing rod extends out of the outer shell and is fixedly connected to the limit block so that the amplitude changing rod and the mounting sleeve rotate synchronously.

12. The ultrasonic cutting device according to claim 11, characterized in that: The inner circumference of the mounting sleeve is provided with a limiting portion extending toward its interior, and the limiting block ring is provided at the front end of the mounting sleeve and fits against the front end surface of the limiting portion; a third locking hole is provided in the limiting block and is arranged through the front and rear end surfaces thereof, and a fourth locking hole corresponding to the third locking hole is provided in the limiting portion; a fourth connecting piece is provided in the third locking hole and can be extended into the fourth locking hole, so that the limiting block is fixedly connected to the mounting sleeve.

13. The ultrasonic cutting device according to claim 11, characterized in that The limit block ring is arranged in the mounting sleeve, and the outer peripheral side of the amplitude changing rod is provided with a transmission part extending outward, and the limit block is provided with a through transmission hole or a rearward-opening transmission groove corresponding to the transmission part. The amplitude changing rod is passed through the limit block, and the transmission part is inserted into the transmission hole or transmission groove, so that the amplitude changing rod is engaged with the limit block.

14. The ultrasonic cutting device according to claim 13, characterized in that: A mounting hole for mounting a tool holder is provided at the front end of the amplitude changing rod, a positioning groove is provided on the side wall of the tool holder, and a first through hole extending through the mounting hole is provided on the side of the amplitude changing rod where the transmission part is provided, and a fastener that can be tightened against the positioning groove is installed in the first through hole.

15. The ultrasonic cutting device according to claim 14, characterized in that: The mounting sleeve is provided with a second through hole corresponding to the first through hole, and the limiting block is provided with a third through hole corresponding to the first through hole.

16. The ultrasonic cutting device according to claim 1, characterized in that It also includes a power housing and a drive assembly, the rear end of the pull rod is arranged in the power housing, and the rear end of the outer shell is rotatably arranged in the power housing; the output end of the drive assembly extends into the power housing and is connected to the rear end of the pull rod through an eccentric structure to drive the pull rod to reciprocate along its axial direction.

17. A machine tool, characterized in that: The ultrasonic cutting device comprises any one of claims 1-16.

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