CN112994516B - Cylindrical large-stroke high-resolution inertial linear motor - Google Patents
Cylindrical large-stroke high-resolution inertial linear motor Download PDFInfo
- Publication number
- CN112994516B CN112994516B CN202110412749.7A CN202110412749A CN112994516B CN 112994516 B CN112994516 B CN 112994516B CN 202110412749 A CN202110412749 A CN 202110412749A CN 112994516 B CN112994516 B CN 112994516B
- Authority
- CN
- China
- Prior art keywords
- clamping mechanism
- backing plate
- shaft
- cylindrical
- linear motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/021—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors using intermittent driving, e.g. step motors, piezoleg motors
- H02N2/025—Inertial sliding motors
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention discloses a cylindrical large-stroke high-resolution inertial linear motor which comprises a mass block, a shaft, piezoelectric ceramics, a base plate and a clamping mechanism, wherein one end of the piezoelectric ceramics is connected with the mass block, the other end of the piezoelectric ceramics is connected with the base plate, the base plate is connected with the clamping mechanism, the mass block, the piezoelectric ceramics, the base plate and the clamping mechanism are all sleeved on the shaft, and the clamping mechanism is in interference fit with the shaft. The invention can not generate electromagnetic interference during working, is not influenced by the electromagnetic interference, can meet the requirement of clean working environment, has stronger adaptability, can realize large stroke and has extremely high resolution.
Description
Technical Field
The invention relates to an inertia linear motor, in particular to a cylindrical large-stroke high-resolution inertia linear motor.
Background
A linear motor refers to a transmission device capable of directly converting electric energy into mechanical energy for linear motion without any intermediate conversion mechanism. The existing linear motor is mostly driven in an electromagnetic mode, but the linear motor driven in the electromagnetic mode is easy to generate electromagnetic interference and is not beneficial to being used in occasions with higher requirements on the electromagnetic interference; in addition, in the existing linear motor, a part of motors have large stroke, but the resolution is low, and a part of motors have high resolution, but the stroke is greatly limited, and although a part of motors have large stroke and high resolution, the design of a control system is very complicated, the design cost is high, the mass production is not facilitated, and the existing motors with large stroke and high resolution generally have the problem of small thrust.
Therefore, a piezoelectric-driven inertial linear motor with high thrust, large stroke and high resolution is urgently needed.
Disclosure of Invention
In view of the above, the present invention provides a cylindrical large-stroke high-resolution inertial linear motor to solve the above technical problems.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a cylindrical big stroke high resolution ratio inertia linear electric motor, includes quality piece, axle, piezoceramics, backing plate and clamping mechanism, piezoceramics's one end with the quality piece is connected, piezoceramics's the other end with the backing plate is connected, the backing plate with clamping mechanism is connected, the quality piece piezoceramics the backing plate with clamping mechanism all overlaps and establishes epaxial, clamping mechanism with axle interference fit.
Furthermore, the clamping mechanism comprises a ring body and a plurality of elastic claws which are distributed circumferentially, the front ends of the elastic claws are connected to the ring body, the rear ends of the elastic claws are clamped on the shaft, and an opening is formed between every two adjacent elastic claws.
Furthermore, an inner cavity is defined between the ring body and the inner sides of the elastic claws, and an inner conical surface is arranged at the rear end of the inner cavity.
Furthermore, the rear end of the backing plate is provided with a conical surface which abuts against the inner conical surface.
Still further, the resilient fingers are provided in three, three being evenly distributed around the axis of the ring body.
Furthermore, the shaft is cylindrical, and the cambered surface of the inner side of the rear end of the elastic claw is pressed against the periphery of the shaft.
Further, the middle part of quality piece is provided with first centre bore, the quality piece passes through first centre bore cover is established the outside of axle, the middle part of backing plate is provided with the second centre bore, the backing plate passes through the second centre bore cover is established the outside of axle.
Furthermore, first protruding axial region and second protruding axial region have connected gradually on the rear end of quality piece, the piezoceramics cover is established on the second protruding axial region, just piezoceramics's preceding terminal surface supports and leans on the first protruding axial region, be provided with the third protruding axial region on the front end of the main part of backing plate, the piezoceramics cover is established on the third protruding axial region, just piezoceramics's rear end face supports and leans on in the main part of backing plate.
Furthermore, the piezoelectric ceramic is connected with the mass block in a bonding mode, the piezoelectric ceramic is connected with the backing plate in a bonding mode, and the backing plate is connected with the clamping mechanism in a bonding mode.
Further, the periphery of the mass block is cylindrical, and the periphery of the clamping mechanism is cylindrical.
The technical scheme can show that the invention has the advantages that:
1. the linear motor takes the piezoelectric stack as a driving source, does not generate electromagnetic interference during working, is not influenced by the electromagnetic interference, can meet the requirement of a clean working environment, and has stronger adaptability;
2. the motor passes through a sawtooth waveform voltage to the piezoelectric ceramic according to an inertia stick-slip principle, so that the piezoelectric ceramic can generate an acceleration in a short time, the acceleration can enable a mass block of the motor to generate an instant thrust, the whole moving part is driven to move forwards for a certain distance, the operation is repeated, a large stroke can be realized through step number accumulation of movement, and meanwhile, the piezoelectric ceramic has extremely high resolution;
3. the clamping mechanism of the motor has a larger contact area with the shaft by adopting a cylindrical structural design, and can output larger holding force while ensuring the precision, thereby realizing larger thrust.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a schematic sectional view at a-a in fig. 2.
Fig. 4 is a schematic perspective view of the clamping mechanism of the present invention.
Fig. 5 is a schematic perspective view of a mass block according to the present invention.
Fig. 6 is a schematic perspective view of the pad of the present invention.
FIG. 7 is a schematic diagram of a sawtooth signal.
Fig. 8 is a partial structural schematic diagram of a second embodiment of the present invention.
List of reference numerals: the mass block comprises a mass block 1, a first center hole 11, a first protruding shaft part 12, a second protruding shaft part 13, an end plate 14, a shaft 2, piezoelectric ceramics 3, a backing plate 4, a second center hole 41, a third protruding shaft part 42, a conical surface 43, a clamping mechanism 5, a ring body 51, elastic claws 52, an arc surface 521, an outer groove 522, an inner groove 523, a conical arc surface 524, an insertion groove 525, a notch 53, an inner conical surface 54, an inner cavity 55, a friction plate 6, an insertion block 61 and a concave arc surface 62.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Example one
Referring to fig. 1 to 7, as shown in fig. 1, 2 and 3, a cylindrical large-stroke high-resolution inertial linear motor includes a mass block 1, a shaft 2, a piezoelectric ceramic 3, a backing plate 4 and a clamping mechanism 5, wherein a first central hole 11 is formed in the middle of the mass block 1, the mass block 1 is sleeved on the outer side of the shaft 2 through the first central hole 11, a second central hole 41 is formed in the middle of the backing plate 4, the backing plate 4 is sleeved on the outer side of the shaft 2 through the second central hole 41, the piezoelectric ceramic 3 is sleeved on the outer side of the shaft 2, the front end of the piezoelectric ceramic 3 is fixedly connected with the mass block 1, the rear end of the piezoelectric ceramic 3 is fixedly connected with the backing plate 4, the clamping mechanism 5 is sleeved on the shaft 2, and the clamping mechanism 5 is in interference fit with the shaft 2, specifically, the clamping mechanism 5 includes a ring body 51 and three elastic claws 52 uniformly distributed around the axis of the ring body 51, the front ends of the elastic claws 52 are connected to the ring body 51, the rear ends of the elastic claws 52 are clamped on the shaft 2, the piezoelectric ceramics 3 and the backing plate 4 are both arranged in a cavity 55 enclosed between the ring body 51 and the inner sides of the three elastic claws 52, and the conical surface 43 at the rear end of the backing plate 4 abuts against an inner conical surface 54 at the rear end of the cavity 55.
As shown in fig. 3 and 4, the shaft 2 is cylindrical, and the inner arc surface 521 of the rear end of the elastic claw 52 abuts against the outer circumference of the shaft 2.
As shown in fig. 3 and 4, the three elastic claws 52 of the clamping mechanism 5 perform a three-claw centering function, and when the clamping mechanism 5 moves, the balance of the moving part can be effectively maintained. Further, the number of the elastic claws 52 may also be set to four, five, six, or the like.
As shown in fig. 4, a gap 53 is formed between two adjacent elastic claws 52, and the three gaps 53 have the same size, and the arrangement of the gaps 53 facilitates the leading-out of the motor wire of the piezoelectric ceramic 3.
In this embodiment, the piezoelectric ceramic 3 is a piezoelectric stack.
As shown in fig. 3, the inner conical surface 54 disposed inside the clamping mechanism 5 can convert the horizontal movement of the auxiliary tool into the radial movement of the elastic portion of the clamping mechanism 5 during assembly, and has a displacement amplification effect, so as to facilitate the assembly of the clamping mechanism 5, and on the other hand, the structure can also effectively ensure the strength of the clamping mechanism 5, and ensure the holding force of the clamping mechanism 5 on the shaft 2.
As shown in fig. 4, a tapered arc surface 524 is provided on the outer side of the rear end of the elastic claw 52 of the clamping mechanism 5, an outer groove 522 is provided on the outer side of the connection between the elastic claw 52 and the ring body 51, and an inner groove 523 is provided on the inner side of the connection between the elastic claw 52 and the ring body 51.
As shown in fig. 3 and 5, the rear end of the mass block 1 is sequentially connected with a first protruding shaft portion 12 and a second protruding shaft portion 13, the first protruding shaft portion 12 extends into the inner cavity 55, the piezoelectric ceramic 3 is sleeved on the second protruding shaft portion 13, the front end face of the piezoelectric ceramic 3 abuts against the first protruding shaft portion 12, the first protruding shaft portion 12 is far away from one end of the second protruding shaft portion 13 is connected with a positioning structure which is located on the outer side of the ring 51 relative to the end plate 14 of the mass block 1, the positioning structure is arranged between the mass block 1 and the piezoelectric ceramic 3, and requirements for installation accuracy and installation difficulty are greatly reduced.
As shown in fig. 3, 4 and 6, a third protruding shaft portion 42 is arranged at the front end of the main body of the backing plate 4, the piezoelectric ceramic 3 is sleeved on the third protruding shaft portion 42, the rear end face of the piezoelectric ceramic 3 abuts against the main body of the backing plate 4, and a positioning structure is arranged between the backing plate 4 and the piezoelectric ceramic 3, so that the mounting precision and the assembling difficulty between the backing plate 4 and the piezoelectric ceramic 3 are greatly reduced, the conical surface 43 of the backing plate 4 is matched with the inner conical surface 54 of the clamping mechanism 5, a better assembling and centering effect is achieved, and the mounting precision and the assembling difficulty between the backing plate 4 and the clamping mechanism 5 can be effectively reduced.
In this embodiment, piezoelectric ceramic 3 is connected through the bonding mode with quality piece 1, and piezoelectric ceramic 3 is connected through the bonding mode with backing plate 4, and backing plate 4 is connected through the bonding mode with clamping mechanism 5, has reduced the quantity of spare part, has shortened whole size simultaneously.
As shown in fig. 1, the periphery of the mass block 1 is cylindrical, the periphery of the clamping mechanism 5 is cylindrical, and the overall structure is designed to be cylindrical, so that the overall size of the motor can be effectively reduced, and the compactness of the structure is increased.
During assembly, the clamping mechanism 5 is mounted on the shaft 2 through a tool, the mass block 1, the piezoelectric ceramic 3 and the backing plate 4 are firstly bonded together by glue, and then the conical surface 43 of the backing plate 4 is bonded on the inner conical surface 54 inside the clamping mechanism 5 by glue.
The theory of operation, because clamping mechanism 5 is interference fit with axle 2 for clamping mechanism 5 is in the state of hugging closely with axle 2 all the time, when leading to the zigzag voltage that figure 7 shows for piezoceramics 3, first step: when the piezoelectric ceramic 3 is energized with the voltage of the section A in the figure 7, the piezoelectric ceramic 3 slowly extends and drives the mass block 1 to slowly move, at the moment, the inertia force generated by the motion acceleration of the mass block 1 is not enough to overcome the holding force of the clamping mechanism 5 to the shaft 2, and the clamping mechanism 5 does not generate displacement; the second step is that: when voltage of section B of figure 7 is applied to the piezoelectric ceramic 3, the piezoelectric ceramic 3 is rapidly shortened from an extension state and drives the mass block 1 to rapidly move back, and at the moment, inertia force generated by the motion acceleration of the mass block 1 overcomes the holding force of the clamping mechanism 5 on the shaft 2, so that the clamping mechanism 5 generates displacement; the continuous forward movement of the clamping mechanism 5 can be achieved by repeating the above two steps, and the continuous backward movement of the clamping mechanism 5 can be achieved.
Example two
As shown in fig. 8, the difference from the first embodiment is that a friction plate 6 is connected to the inner side of the rear end of the elastic claw 52 of the clamping mechanism 5, the concave arc surface 62 on the inner side of the friction plate 6 is pressed against the periphery of the shaft 2, and the insertion block 61 on the outer side of the friction plate 6 is inserted into the insertion groove 525 on the inner side of the rear end of the elastic claw 52, so that when the friction plate 6 is worn after being used for a period of time, only the friction plate 6 needs to be replaced, the whole clamping mechanism 5 does not need to be replaced, and the cost is saved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a cylindrical big stroke high resolution ratio inertia linear electric motor, its characterized in that, including quality piece (1), axle (2), piezoceramics (3), backing plate (4) and clamping mechanism (5), the one end of piezoceramics (3) with quality piece (1) is connected, the other end of piezoceramics (3) with backing plate (4) are connected, backing plate (4) with clamping mechanism (5) are connected, quality piece (1), piezoceramics (3), backing plate (4) and clamping mechanism (5) all overlap and are established on axle (2), clamping mechanism (5) with axle (2) interference fit, wherein, the middle part of quality piece (1) is provided with first centre bore (11), quality piece (1) is established through first centre bore (11) cover the outside of axle (2), a second central hole (41) is formed in the middle of the backing plate (4), and the backing plate (4) is sleeved on the outer side of the shaft (2) through the second central hole (41); the clamping mechanism (5) comprises a ring body (51) and a plurality of elastic claws (52) which are distributed circumferentially, the front ends of the elastic claws (52) are connected to the ring body (51), the rear ends of the elastic claws (52) are clamped on the shaft (2), gaps (53) are formed between every two adjacent elastic claws (52), an inner cavity (55) is formed between the inner sides of the ring body (51) and the elastic claws (52), the piezoelectric ceramics (3) and the base plate (4) are arranged in the inner cavity (55), the rear end of the inner cavity (55) is provided with an inner conical surface (54), the rear end of the base plate (4) is provided with a conical surface (43), the conical surface (43) is abutted to the inner conical surface (54), the rear end of the shaft part (1) is sequentially connected with a first convex shaft (12) and a second convex shaft (13), the piezoelectric ceramics (3) is sleeved on the second convex shaft part (13), one end of the first protruding shaft portion (12) far away from the second protruding shaft portion (13) is connected with an end plate (14) of the mass block (1) located on the outer side of the ring body (51).
2. The cylindrical large stroke high resolution inertial linear motor according to claim 1, characterized in that said elastic claws (52) are provided in three, three elastic claws (52) being evenly distributed around the axis of said ring (51).
3. The cylindrical large-stroke high-resolution inertial linear motor according to claim 1, characterized in that the shaft (2) is cylindrical, and the cambered surface (521) on the inner side of the rear end of the elastic claw (52) is pressed against the outer circumference of the shaft (2).
4. The cylindrical large-stroke high-resolution inertial linear motor according to any one of claims 1 to 3, wherein a front end face of the piezoelectric ceramic (3) abuts against the first boss portion (12), a third boss portion (42) is provided on a front end of the main body of the backing plate (4), the piezoelectric ceramic (3) is sleeved on the third boss portion (42), and a rear end face of the piezoelectric ceramic (3) abuts against the main body of the backing plate (4).
5. The cylindrical large stroke high resolution inertial linear motor according to any one of claims 1 to 3, characterized in that the piezoelectric ceramic (3) is connected to the mass (1) by bonding, the piezoelectric ceramic (3) is connected to the pad (4) by bonding, and the pad (4) is connected to the clamping mechanism (5) by bonding.
6. The cylindrical large stroke high resolution inertial linear motor according to any one of claims 1 to 3, characterized in that the outer periphery of the mass (1) is cylindrical and the outer periphery of the clamping mechanism (5) is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110412749.7A CN112994516B (en) | 2021-04-16 | 2021-04-16 | Cylindrical large-stroke high-resolution inertial linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110412749.7A CN112994516B (en) | 2021-04-16 | 2021-04-16 | Cylindrical large-stroke high-resolution inertial linear motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112994516A CN112994516A (en) | 2021-06-18 |
| CN112994516B true CN112994516B (en) | 2022-06-21 |
Family
ID=76340887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110412749.7A Active CN112994516B (en) | 2021-04-16 | 2021-04-16 | Cylindrical large-stroke high-resolution inertial linear motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112994516B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0539969A1 (en) * | 1991-10-31 | 1993-05-05 | Matsushita Electric Industrial Co., Ltd. | Ultrasonic motor |
| KR20070065699A (en) * | 2005-12-20 | 2007-06-25 | 엘지전자 주식회사 | Miniature Piezoelectric Linear Motors |
| JP2009136066A (en) * | 2007-11-29 | 2009-06-18 | Canon Inc | Ultrasonic motor |
| CN107834894A (en) * | 2017-11-02 | 2018-03-23 | 宁波大学 | A kind of piezoelectricity looper linear electric motors |
-
2021
- 2021-04-16 CN CN202110412749.7A patent/CN112994516B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0539969A1 (en) * | 1991-10-31 | 1993-05-05 | Matsushita Electric Industrial Co., Ltd. | Ultrasonic motor |
| KR20070065699A (en) * | 2005-12-20 | 2007-06-25 | 엘지전자 주식회사 | Miniature Piezoelectric Linear Motors |
| JP2009136066A (en) * | 2007-11-29 | 2009-06-18 | Canon Inc | Ultrasonic motor |
| CN107834894A (en) * | 2017-11-02 | 2018-03-23 | 宁波大学 | A kind of piezoelectricity looper linear electric motors |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112994516A (en) | 2021-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2629948C (en) | A screw thread driving polyhedral ultrasonic motor | |
| US7432633B2 (en) | Ultrasonic driving apparatus | |
| US4714855A (en) | Piezo-electric actuator and stepping device using same | |
| CN110138265B (en) | Self-centering piezoelectric inchworm linear motor | |
| US9941818B2 (en) | Micro inchworm-type piezoelectric-driven rotating joint mechanism | |
| CN110460264B (en) | Piezoelectric driver for improving performance based on four-foot coupling motion mode and control method | |
| JP2002095274A (en) | Driver using electromechanical converter | |
| JP2001161083A (en) | Electromechanical motor | |
| CN115070816B (en) | Robot joint module and robot | |
| CN112965200A (en) | Telescopic zoom lens | |
| KR100262893B1 (en) | Piezo-electric motor | |
| CN112994516B (en) | Cylindrical large-stroke high-resolution inertial linear motor | |
| TW201338359A (en) | Linear actuator assembly and oral hygiene device including the same | |
| CN210034218U (en) | Tooth-embedded electromagnetic clutch | |
| CN210431263U (en) | Novel piezoelectric rotation precision driving platform | |
| RU2008130527A (en) | POWER TOOL | |
| CN117544017A (en) | Piezoelectric driving device | |
| CN214375498U (en) | Telescopic zoom lens | |
| CN210225279U (en) | Piezoelectric driver for improving performance based on four-foot coupling motion mode | |
| CN211371164U (en) | Harmonic reducer for robot joint module | |
| US20060055251A1 (en) | Tubular linear motor for electrical discharge machine | |
| EP0770999A1 (en) | Hard disc drive with a compound bearing assembly | |
| JP4018294B2 (en) | Electric cylinder | |
| JP5521401B2 (en) | Vibration actuator, lens barrel, camera, and method for manufacturing vibration actuator | |
| CN114055248B (en) | Piezoelectrically-driven microminiature index plate and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |