CN218904361U - Ultrasonic knife handle - Google Patents

Abstract

The utility model discloses an ultrasonic knife handle, which comprises a knife handle shell and an ultrasonic vibration assembly, wherein the front end of the knife handle shell is provided with a cavity, the rear end of the ultrasonic vibration assembly is fixedly connected in the cavity, the ultrasonic vibration assembly comprises an ultrasonic vibration unit, a variable amplitude rod, a rivet and a hot-charging chuck, the center of the variable amplitude rod is provided with a variable amplitude rod through hole in a penetrating mode, the variable amplitude rod through hole is respectively provided with a first through hole section, a second through hole section, a third through hole section and a fourth through hole section from back to front, the front end of the ultrasonic vibration unit is fixedly connected at the first through hole section, the rear end of the rivet is clamped at the second through hole section, the front end of the rivet penetrates through the third through hole section and then extends to the fourth through hole section, the outer side wall of the rear end of the hot-charging chuck is matched with the side wall of the fourth through hole section, the rear end of the hot-charging chuck is fixedly connected with the front end of the rivet, and the front end of the hot-charging chuck is used for mounting and connecting a cutter. The utility model can improve the processing precision on the basis of solving the energy loss problem of the cutter clamping mode of the ultrasonic system.

Description

Ultrasonic knife handle

Technical Field

The utility model relates to the technical field of ultrasonic machining, in particular to an ultrasonic knife handle.

Background

Ultrasonic processing is a special processing technology for gradually crushing the surface of a workpiece material, and utilizes high-frequency small-amplitude vibration generated by an ultrasonic knife handle to drive a processing cutter to vibrate. Are commonly used for milling, drilling, turning and polishing. The ultrasonic knife handle mainly comprises an ultrasonic vibration system and a knife handle component. The existing ultrasonic knife handle is fixed on the energy converter component in a mode of using a nut to lock the clamp after clamping the knife by the spring clamp, and the ultrasonic knife handle is frequently hidden in ultrasonic vibration energy loss during working, so that the machining precision is further greatly reduced.

The foregoing background is only for the purpose of facilitating an understanding of the principles and concepts of the utility model and is not necessarily in the prior art to the present application and is not intended to be used as an admission that such background is not entitled to antedate such novelty and creativity by the present application without undue evidence prior to the present application.

Disclosure of Invention

In order to solve the technical problems, the utility model provides an ultrasonic knife handle, which can improve the processing precision on the basis of solving the energy loss problem of the existing ultrasonic vibration system on the knife clamping mode.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model discloses an ultrasonic knife handle, which comprises a knife handle shell and an ultrasonic vibration assembly, wherein the front end of the knife handle shell is provided with a cavity, the rear end of the ultrasonic vibration assembly is fixedly connected in the cavity, the ultrasonic vibration assembly comprises an ultrasonic vibration unit, a variable amplitude rod, a blind rivet and a hot-mounting chuck, the center of the variable amplitude rod is provided with a variable amplitude rod through hole in a penetrating mode, the variable amplitude rod through hole is respectively provided with a first through hole section, a second through hole section, a third through hole section and a fourth through hole section from back to front, the front end of the ultrasonic vibration unit is fixedly connected with the first through hole section, the rear end of the blind rivet is clamped at the second through hole section, the front end of the blind rivet penetrates through the third through hole section and then extends to the fourth through hole section, the outer side wall of the rear end of the hot-mounting chuck is matched with the side wall of the fourth through hole section, the rear end of the hot-mounting chuck is fixedly connected with the front end of the blind rivet, and the front end of the hot-mounting chuck is used for mounting and connecting a cutter.

Preferably, the diameter of the first through hole section is larger than the diameter of the second through hole section, and the diameter of the second through hole section and the diameter of the fourth through hole section are respectively larger than the diameter of the third through hole section.

Preferably, the fourth through hole section is a tapered hole, and the diameter of the tapered hole is larger from back to front, wherein the diameter of the rear end of the tapered hole is larger than the diameter of the third through hole section.

Preferably, the ultrasonic knife handle further comprises a waterproof gasket, and the waterproof gasket is clamped and fixed at the contact position of the blind rivet and the amplitude transformer.

Preferably, the ultrasonic knife handle comprises a waterproof plug, a knife handle shell through hole is formed in the knife handle shell from the rear end of the knife handle shell to the rear end of the cavity, and the waterproof plug is fixedly connected in the knife handle shell through hole.

Preferably, the hot-charging chuck is connected with the blind rivet through threads, and the threaded fit length between the hot-charging chuck and the blind rivet is smaller than the distance between the rear end of the blind rivet and the front end of the ultrasonic vibration unit.

Preferably, the ultrasonic knife handle further comprises a gland, an amplitude transformer flange is arranged at the outer circumference of the amplitude transformer, and the gland is fixedly connected at the front end of the cavity to fixedly connect the amplitude transformer flange between the knife handle shell and the gland.

Preferably, 4 to 8 spiral grooves which are uniformly distributed are formed in the outer circumference of the front part of the amplitude transformer.

Preferably, the ultrasonic vibration unit comprises a hollow screw, a back cover plate, a plurality of electrode plates and a plurality of piezoelectric ceramic plates, wherein the electrode plates and the piezoelectric ceramic plates are coaxially and alternately arranged between the back cover plate and the amplitude transformer along the axial direction, and the hollow screw penetrates through the back cover plate, the electrode plates and the piezoelectric ceramic plates and then is fixedly connected to the first through hole section of the amplitude transformer so as to fixedly connect the electrode plates and the piezoelectric ceramic plates to the rear end of the amplitude transformer.

Preferably, the cannulated screws are screws having a strength rating of 12.9.

Compared with the prior art, the utility model has the beneficial effects that: according to the ultrasonic knife handle disclosed by the utility model, the hot-charging chuck and the blind rivet are connected at the front end of the amplitude transformer in a matched manner, so that a knife can be installed at the front end of the amplitude transformer through the hot-charging chuck, wherein the rigid contact surface of the hot-charging chuck is only provided with the fourth through hole section, so that the precision of the ultrasonic knife handle is more stable, and the processing precision can be improved on the basis of solving the problem of energy loss of the knife handle generated at the knife chuck when the traditional ultrasonic vibration system works.

In a further aspect, the utility model also has the following advantages:

a plurality of spiral grooves can be formed in the outer circumferential surface of the front part of the amplitude transformer flange in the ultrasonic knife handle, and the ultrasonic vibration system can generate different longitudinal torsion vibration amplitude ratios by adjusting the parameters of the spiral grooves; or the spiral groove is canceled, so that the ultrasonic vibration system outputs single longitudinal vibration.

The utility model can also use the hot-charging chucks with different mounting conical holes or different clamping diameters, thereby improving the interchangeability of the ultrasonic knife handle parts.

Drawings

FIG. 1 is a schematic view of the ultrasonic blade handle of the preferred embodiment of the present utility model;

FIG. 2 is a schematic structural view of the ultrasonic vibration assembly of FIG. 1;

FIG. 3 is a schematic view of the horn of FIG. 2;

fig. 4 is a schematic view of the thermal chuck of fig. 2.

Detailed Description

The following describes embodiments of the present utility model in detail. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the utility model or its applications.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for both the fixing action and the circuit/signal communication action.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing embodiments of the utility model and to simplify the description by referring to the figures, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

Through researching the ultrasonic knife handle that adopts collet chuck centre gripping cutter now, use the mode of nut locking chuck to fix the cutter on transducer part behind the collet chuck centre gripping cutter, ultrasonic knife handle is at the during operation, because the structure of collet chuck is complicated relatively and with the surface contact of installation taper hole insufficient, leads to often having ultrasonic vibration energy loss's hidden danger, further leads to machining precision greatly reduced. Based on the above, the utility model discloses a novel ultrasonic knife handle which overcomes the problems.

It should be noted that, for convenience of explanation, the "front" in the embodiment of the present utility model refers to the direction in which the mounting position of the tool in the integral ultrasonic tool holder is located, and the "rear" refers to the direction opposite to the "front" in order to clarify the positional relationship between the structures.

As shown in fig. 1, the preferred embodiment of the utility model discloses an ultrasonic knife handle, which comprises an ultrasonic vibration assembly 1 and a knife handle shell 2, wherein the front end of the knife handle shell 2 is provided with a cavity 21, and the rear end of the ultrasonic vibration assembly 1 is fixedly connected in the cavity 21. Referring to fig. 2, the ultrasonic vibration assembly 1 comprises an ultrasonic vibration unit 11, a horn 12, a pull nail 13 and a hot charging chuck 14, wherein the ultrasonic vibration unit 11 is fixedly connected to the rear end of the horn 12, and the hot charging chuck 14 is fixedly connected to the front end of the horn 12.

As shown in fig. 2, the ultrasonic vibration unit 11 includes a hollow screw 111, a back cover plate 112, a plurality of electrode plates 113 and a plurality of piezoelectric ceramic plates 114, the plurality of electrode plates 113 and the plurality of piezoelectric ceramic plates 114 are coaxially and alternately arranged between the back cover plate 112 and the horn 12 in the axial direction, and the hollow screw 111 penetrates through the back cover plate 112, the plurality of electrode plates 113 and the plurality of piezoelectric ceramic plates 114 and then is fixedly connected at the rear end of the horn 12 so as to fixedly connect the plurality of electrode plates 113 and the plurality of piezoelectric ceramic plates 114 at the rear end of the horn 12. Among them, the cannulated screws 111 are screws having a strength level of 12.9.

Referring to fig. 3, a horn through hole 121 is formed in the center of the horn 12, the horn through hole 121 is formed from the back to the front and is respectively a first through hole section 1211, a second through hole section 1212, a third through hole section 1213 and a fourth through hole section 1214, the front end of the ultrasonic vibration unit 11 (i.e. the front end of the hollow screw 111) is fixedly connected to the first through hole section 1211, the rear end of the blind rivet 13 is clamped at the second through hole section 1212, the front end of the blind rivet 13 extends to the fourth through hole section 1214 after passing through the third through hole section 1213, the outer side wall of the rear end of the hot clamping head 14 is matched with the side wall of the fourth through hole section 1214, the rear end of the hot clamping head 14 is fixedly connected with the front end of the blind rivet 13, and the front end of the hot clamping head 14 is used for mounting and connecting a cutter 6 under heating conditions. Wherein, the cutter 6 is connected with the front end of the amplitude transformer 12 through the hot-charging chuck 14 and the blind rivet 13, in particular, the cutter 6 is inserted into the hole of the hot-charging chuck 14 under the heating condition, and after cooling, the cutter 6 can be firmly connected in the hole of the hot-charging chuck 14, namely, the cutter 6 is connected with the front end of the amplitude transformer 12.

Wherein the diameter of the first through-hole section 1211 is greater than the diameter of the second through-hole section 1212, and the diameter of the second through-hole section 1212 and the diameter of the fourth through-hole section 1214 are each greater than the diameter of the third through-hole section 1213; specifically, the first through hole section 1211 and the second through hole section 1212 are screw holes, the third through hole section 1213 is a cylindrical hole, the fourth through hole section 1214 is a tapered hole, and the diameter of the tapered hole is larger and larger from the rear to the front, wherein the diameter of the rear end side of the tapered hole is larger than the diameter of the third through hole section 1213. A first through hole section 1211 with a threaded hole is used for being matched with the hollow screw 111 to compress the electrode plates 113 and the piezoelectric ceramic plates 114, and a second through hole section 1212 with a threaded hole is used for being matched with the blind rivet 13 to lock the hot charging chuck 14 on the amplitude transformer 12; a fourth bore section 1214, which utilizes a tapered bore, is provided for mating engagement with the rear outer sidewall of hot chuck 14. In a particular embodiment, the diameter of first through bore section 1211 should be greater than the maximum outer diameter of the socket head wrench used for blind rivet 13.

An amplitude transformer flange 122 is arranged on the outer circumference of the amplitude transformer 12, and the large diameter of the front end of the amplitude transformer flange 122 is transited by two large circular arcs with the radius of R1 and the radius of R2, so that the diameter of the amplitude transformer 12 is gradually reduced to a small step at the front end of the amplitude transformer 12 to stop; the amplitude transformer 12 is structured such that the ultrasonic vibration assembly 1 has a node with zero amplitude in the ultrasonic vibration state, and the node with zero amplitude at the front of the ultrasonic vibration assembly 1 in the ultrasonic vibration state is designed at the position of the amplitude transformer flange 122, so that the ultrasonic vibration is prevented from being transmitted to the machine tool spindle connected to the rear through the shank housing 2 via the amplitude transformer flange 122. The large diameter at the front end of the amplitude transformer 12 is in transition with the small diameter at the rear end of the amplitude transformer 12 through large circular arcs (two large circular arcs with the radius of R1 and the radius of R2), so that the stress concentration at the amplitude transformer 12 is reduced when the ultrasonic vibration assembly 1 vibrates ultrasonically.

The ultrasonic knife handle also comprises a gland 3, a waterproof plug 4 and a waterproof gasket 5, wherein the gland 3 is fixedly connected at the front end of the cavity 21 through threads (namely, the gland 3 is in threaded connection with the knife handle shell 2) so as to fixedly connect the amplitude transformer flange 122 between the knife handle shell 2 and the gland 3, and a plurality of spiral grooves 123 which are uniformly distributed, for example, 4-8 spiral grooves are formed at the outer circumference of the front part of the amplitude transformer 12 (namely, the front side of the amplitude transformer flange 122); a tool handle shell through hole 22 is formed in the tool handle shell 2 from the rear end of the tool handle shell to the rear end of the cavity 21, the waterproof plug 3 is fixedly connected in the tool handle shell through hole 22 through threads so as to enable the cavity 21 of the tool handle shell 2 to be waterproof and isolated from the outside, and a raw material tape is required to be wound when the waterproof plug 3 is installed; the waterproof gasket 3 is clamped and fixed at the contact position of the blind rivet 13 and the amplitude transformer 12 to play a waterproof role, so that moisture is prevented from entering the interior of the cutter handle shell 2 due to a tiny gap between the amplitude transformer 12 and the hot-charging chuck 14 caused by a process. When the hot-assembling clamp 14 needs to be replaced, the waterproof plug 4 needs to be detached, and the hot-assembling clamp 14 can be detached by unscrewing the blind rivet 13 by using an inner hexagonal wrench.

The hot clamping head 14 is connected with the blind rivet 13 through threads, and the hot clamping head 14 is fastened at the front end of the amplitude transformer 12 through axial pulling force generated by the threads; wherein the screw-fit length between the hot-set chuck 14 and the blind rivet 13 is smaller than the distance between the rear end of the blind rivet 13 and the front end of the ultrasonic vibration unit 11 (i.e., the front end of the cannulated screw 111).

The conventional ER collet in the prior art is loose in order to ensure the elastic structure, but the hot-charging collet 14 adopted in the preferred embodiment of the utility model does not need elasticity, so that the integrity is better, the hot-charging collet 14 has stronger integrity and rigidity relative to the collet, thereby being more beneficial to the conduction of ultrasonic waves in the ultrasonic knife handle, and the contact area between the hot-charging collet 14 and the fourth hole section 1214 adopting a conical hole is far larger than the collet under the same specification because of the gap existing in the conical shape of the conventional ER collet, so that the energy loss in the process of conducting ultrasonic waves in the ultrasonic knife handle is reduced; and the rigid contact surface of the hot-charging chuck is provided with only the fourth hole section 1214 adopting the conical hole by using a pull-back type mounting method in the preferred embodiment of the utility model, so that the precision of the ultrasonic knife handle is more stable.

The background section of the present utility model may contain background information about the problem or environment of the present utility model rather than the prior art described by others. Accordingly, inclusion in the background section is not an admission of prior art by the applicant.

The foregoing is a further detailed description of the utility model in connection with specific/preferred embodiments, and it is not intended that the utility model be limited to such description. It will be apparent to those skilled in the art that several alternatives or modifications can be made to the described embodiments without departing from the spirit of the utility model, and these alternatives or modifications should be considered to be within the scope of the utility model. In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "preferred embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. Although embodiments of the present utility model and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope as defined by the appended claims.

Claims (10)

1. The utility model provides an ultrasonic knife handle, its characterized in that includes handle of a knife shell and ultrasonic vibration subassembly, the cavity has been seted up to the front end of handle of a knife shell, ultrasonic vibration subassembly's rear end fixed connection is in the cavity, ultrasonic vibration subassembly includes ultrasonic vibration unit, amplitude transformer, blind rivet and hot-set chuck, the center department of amplitude transformer runs through and sets up the amplitude transformer through-hole, the amplitude transformer through-hole is first through-hole section, second through-hole section, third through-hole section and fourth through-hole section from the back forward respectively, ultrasonic vibration unit's front end fixed connection is in first through-hole section department, the rear end block of blind rivet is in second through-hole section department, just the front end of blind rivet passes behind the third through-hole section extends to fourth through-hole section department, the rear end lateral wall of hot-set chuck with the lateral wall phase-match of fourth through-hole section and the rear end of hot-set chuck with the front end fixed connection of blind rivet, the front end of hot-set chuck is used for installing and connecting a cutter.

2. The ultrasonic blade handle of claim 1, wherein the first through-hole section has a diameter greater than the second through-hole section, and wherein the second through-hole section and the fourth through-hole section each have a diameter greater than the third through-hole section.

3. The ultrasonic blade handle of claim 1, wherein the fourth through-hole section is a tapered bore and the tapered bore has a diameter that increases from back to front, wherein the diameter of the rear end of the tapered bore is greater than the diameter of the third through-hole section.

4. The ultrasonic blade handle of claim 1, further comprising a waterproof gasket snap-fit secured in contact with the horn at the location of contact of the rivet with the horn.

5. The ultrasonic knife handle of claim 1, further comprising a waterproof plug, wherein a knife handle housing through hole is formed in the knife handle housing from the rear end of the knife handle housing to the rear end of the cavity, and the waterproof plug is fixedly connected in the knife handle housing through hole.

6. The ultrasonic tool handle according to claim 1, wherein the hot-pack chuck is connected with the blind rivet through threads, and the threaded engagement length between the hot-pack chuck and the blind rivet is smaller than the distance between the rear end of the blind rivet and the front end of the ultrasonic vibration unit.

7. The ultrasonic handle of claim 1, further comprising a gland, wherein an horn flange is provided at an outer circumference of the horn, the gland being fixedly connected at a forward end of the cavity to fixedly connect the horn flange between the handle housing and the gland.

8. The ultrasonic blade handle of claim 1, wherein 4-8 evenly distributed helical grooves are formed in the outer circumference of the front portion of the horn.

9. The ultrasonic blade handle of any one of claims 1 to 8, wherein the ultrasonic vibration unit comprises a hollow screw, a back cover plate, a plurality of electrode sheets and a plurality of piezoelectric ceramic sheets, wherein the plurality of electrode sheets and the plurality of piezoelectric ceramic sheets are coaxially and alternately arranged between the back cover plate and the horn in the axial direction, and the hollow screw penetrates through the back cover plate, the plurality of electrode sheets and the plurality of piezoelectric ceramic sheets and is then fixedly connected to the first through hole section of the horn so as to fixedly connect the plurality of electrode sheets and the plurality of piezoelectric ceramic sheets to the rear end of the horn.

10. The ultrasonic blade handle of claim 9, wherein the cannulated screws comprise 12.9 strength grade screws.

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