Piezoelectric driving part, bi-directional driving vehicle-mounted self-adaptive empennage motor mechanism and bi-directional driving method

Abstract

The invention discloses a piezoelectric driving part, a bidirectional driving vehicle-mounted self-adaptive empennage motor mechanism and a bidirectional driving method, and relates to the technical field of vehicle-mounted self-adaptive empennages. The piezoelectric driving part comprises a rotating shaft and a piezoelectric stator disc, a driving surface is arranged in the center of the rotating shaft, and the piezoelectric stator disc integrally sleeves the peripheral side of the driving surface; a plurality of flexible beam structures are arranged on the piezoelectric stator disc, driving feet are arranged on the flexible beam structures, and the driving feet make contact with the driving face; piezoelectric ceramics are arranged at the positions, located on the two sides of the driving feet, of the flexible beam structures, and the piezoelectric ceramics are used for stretching or retracting the flexible beam structure on one side and providing clockwise or anticlockwise driving force for the driving face and the rotating shaft. The empennage can be bidirectionally driven, the empennage can be adjusted in real time in the driving process, meanwhile, bidirectional self-locking can be achieved at a set angle, and therefore the position precision of the empennage is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle-mounted adaptive tail wing, in particular to a piezoelectric driving component, a bidirectionally driven vehicle-mounted adaptive tail wing motor mechanism and a bidirectional driving method. Background Art

[0002] With the rapid development of the automobile industry, the speed of cars is getting faster and faster. At the same time, the corresponding problems that plague the automobile industry are also increasing. The increase in speed has greatly increased the resistance and lift of the car body. Excessive resistance has led to a significant decrease in fuel economy, while excessive lift has also led to a decrease in the operational stability of the car during driving, making it easy to have problems such as "floating" and instability when driving at high speeds, which seriously affects driving safety.

[0003] The on-board adaptive rear wing can adjust the angle of the rear wing according to the vehicle's speed and surrounding environment, reduce air resistance, increase the pressure between the tire and the ground, and thus improve driving safety and stability. However, during the driving process, the aerodynamic force acting on the rear wing surface changes all the time, and the angle of the rear wing must also be adjusted all the time. How to improve the positioning accuracy of the rear wing poses a great challenge to the design requirements of the drive actuator. Summary of the invention

[0004] The purpose of the present invention is to provide a piezoelectric drive component, a bidirectionally driven vehicle-mounted adaptive tail wing motor mechanism and a bidirectional driving method, which integrates the piezoelectric intelligent structure and the ratchet mechanism and is applied to the design of a vehicle-mounted adaptive tail wing actuator, so as to be able to drive the tail wing bidirectionally, not only allowing the tail wing to be adjusted in real time during driving, but also achieving bidirectional self-locking at a set angle, thereby greatly improving the position accuracy of the tail wing.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] A first aspect of the present invention provides a piezoelectric driver.

[0007] The piezoelectric driving component includes a rotating shaft and a piezoelectric stator disk, wherein a driving surface is arranged in the center of the rotating shaft, and the piezoelectric stator disk is integrally sleeved on the circumference of the driving surface; a plurality of flexible beam structures are arranged on the piezoelectric stator disk, and each of the flexible beam structures is arranged with a driving foot, and the driving foot is in contact with the driving surface; piezoelectric ceramics are arranged at positions on both sides of the driving foot of the flexible beam structure, and the piezoelectric ceramics are used to extend or contract the flexible beam structure on one side, thereby providing a clockwise or counterclockwise driving force for the driving surface and the rotating shaft.

[0008] As an optional technical solution, a hollow ring structure is provided on the piezoelectric stator disk, and the hollow ring structure is sleeved on the circumferential side of the driving surface; a plurality of flexible beam structures are evenly distributed along the inner wall of the hollow ring, and there are gaps between adjacent flexible beam structures; each of the flexible beam structures is connected to the inner wall of the hollow ring through a first end and a second end.

[0009] As an optional technical solution, the driving foot is arranged at the central position of the flexible beam structure, and piezoelectric ceramics are arranged on the upper and lower sides of the flexible beam structure, and the piezoelectric ceramics are thin-sheet structures; friction material is arranged on the driving surface.

[0010] As an optional technical solution, the left and right sides of the rotating shaft are symmetrically arranged along the driving surface, and the left and right ends of the rotating shaft are provided with threaded surfaces and limit platforms. The threaded surfaces are used for threaded connection with external transmission parts, and the limit platforms are used to limit the transmission parts.

[0011] As an optional technical solution, a bearing inner ring mounting surface and a bearing cover mounting surface are also provided on the left and right sides of the rotating shaft.

[0012] A second aspect of the present invention provides a bidirectionally driven vehicle-mounted adaptive tail wing motor mechanism.

[0013] A bidirectionally driven vehicle-mounted adaptive tail wing motor mechanism comprises the piezoelectric driving member, a left transmission part and a right transmission part as described in the first aspect, wherein the left transmission part and the right transmission part are symmetrically arranged on both sides of the piezoelectric driving member, wherein:

[0014] The left transmission part and the right transmission part both include a transmission support plate, an output shaft is arranged on the transmission support plate, one end of the output shaft is provided with a receiving cavity adapted to the rotating shaft of the piezoelectric drive member, and a thread structure adapted to the thread surface is arranged on the side of the receiving cavity close to the rotating shaft; the other end of the output shaft is used to connect an external load member;

[0015] It also includes a mounting seat, and the bottoms of the left transmission part and the right transmission part are both slidably connected to the mounting seat.

[0016] As an optional technical solution, a one-way rotation locking mechanism is provided on both the left transmission part and the right transmission part, and the one-way rotation locking mechanism includes a transmission ratchet and a one-way locking piece. The transmission ratchet is arranged on the inner side of the output shaft, and the one-way locking piece includes a transmission self-locking block rotatably connected to the transmission support plate, the transmission self-locking block is adapted to the ratchet teeth of the transmission ratchet, and the transmission self-locking block is connected to the transmission support plate through a transmission spring; multiple one-way locking pieces are arranged along the circumference of the transmission ratchet.

[0017] As an optional technical solution, the transmission ratchet and the output shaft are an integrally formed structure; a first bearing is arranged on the end surface of one side of the transmission support plate, and a first bearing gland is arranged on the outer side of the first bearing;

[0018] The outer ring of the first bearing is installed in the bearing installation hole of the transmission support plate, and the inner ring of the first bearing is installed on the output shaft.

[0019] As an optional technical solution, it also includes a symmetrically arranged left support part and a right support part, the left support part is arranged between the piezoelectric drive member and the left transmission part, and the right support part is arranged between the piezoelectric drive member and the right transmission member; wherein the left support part and the right support part both include a shaft support plate, an inner slideway is arranged on the shaft support plate, a second bearing is arranged in the inner slideway, and a second bearing gland is arranged on the outer side of the support bearing;

[0020] The outer ring of the second bearing is installed in the inner slideway, the inner ring of the second bearing is installed on the bearing inner ring installation surface of the rotating shaft, and the second bearing pressure cover is installed on the bearing cover installation surface of the rotating shaft.

[0021] A third aspect of the present invention provides a bidirectional driving method for a piezoelectric driver.

[0022] The bidirectional driving method of the piezoelectric actuator includes a forward driving method and a reverse driving method:

[0023] The forward driving method comprises the following steps:

[0024] The piezoelectric ceramics on both sides of the driving foot of the flexible beam structure are controlled to extend simultaneously, so that the flexible beam structure is bent and deformed, and the driving foot is lifted up;

[0025] Control the piezoelectric ceramic of the flexible beam structure located at the first side of the driving foot to extend and the second side to shorten, so that the driving foot swings toward the second side to generate a driving force;

[0026] The piezoelectric ceramic controlling the flexible beam structure at the first side of the driving foot is also shortened, and the driving foot drops to the lowest point;

[0027] The piezoelectric ceramic of the flexible beam structure located at the second side of the driving foot is controlled to extend again, and the driving foot swings toward the first side to generate a driving force.

[0028] The present invention has the following beneficial effects:

[0029] The present invention proposes a piezoelectric drive component, a bidirectionally driven vehicle-mounted adaptive tail wing motor mechanism and a bidirectional driving method, and integrates the piezoelectric intelligent structure with the ratchet mechanism and is applied to the design of a vehicle-mounted adaptive tail wing actuator. Not only can the tail wing be adjusted in real time during driving, but it can also achieve self-locking at a set angle, thereby greatly improving the position accuracy of the tail wing, and providing a new idea for the design of a new vehicle-mounted adaptive tail wing mechanism.

[0030] The piezoelectric drive of the present invention is provided with a rotating shaft and a piezoelectric stator disk, and a driving surface is provided in the center of the rotating shaft. The flexible beam structure on the piezoelectric stator disk and the driving foot thereon are used to realize bidirectional driving of the driving surface. Piezoelectric ceramics are provided on the flexible beam structure, and the piezoelectric ceramics are respectively provided on the left and right sides of the driving foot. The driving surface is driven as a whole by stimulating the piezoelectric ceramics. The present invention is cleverly designed, and the piezoelectric drive can realize the separate driving of the left transmission part and the right transmission part located on the left and right sides of the piezoelectric drive, thereby realizing the adjustment of the tail wing, which is suitable for the application scenario of real-time adjustment of the angle of the vehicle tail wing, and the positioning accuracy of the tail wing is easily improved through bidirectional driving.

[0031] The present invention is also provided with a one-way rotation locking mechanism, which is realized by the cooperation of the transmission ratchet and the one-way locking member. When the tail wing needs to stop adjusting at a set angle, the one-way rotation locking mechanism can be used to better position the angle.

[0032] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a schematic diagram of the overall structure of the second embodiment of the present invention.

[0035] Figure 2 It is a schematic diagram of the left transmission part of the second embodiment of the present invention.

[0036] Figure 3 It is a schematic diagram of the left side support portion of the second embodiment of the present invention.

[0037] Figure 4 Schematic diagram of a piezoelectric driver according to a first embodiment of the present invention.

[0038] Figure 5 It is a schematic diagram of a rotating shaft according to an embodiment of the present invention.

[0039] Figure 6 This is a schematic diagram of the clockwise operation of the piezoelectric driving foot in Example 3 of the present invention.

[0040] Figure 7 This is a schematic diagram of the piezoelectric driving foot working counterclockwise in embodiment 3 of the present invention.

[0041] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0042] 1. Transmission support plate, 2. Transmission spring, 3. Transmission self-locking block, 4. Transmission ratchet, 5. First bearing, 6. First bearing cover, 7. Rotating shaft support plate, 8. Second bearing, 9. Second bearing cover, 10. Piezoelectric stator disk, 11. Rotating shaft, 12. Piezoelectric ceramics, 101. Spring pull block, 102. Spring mounting hole, 103. Bearing mounting hole, 301. Rotating hole, 302. Spring mounting hole, 401. Output shaft, 402. Threaded connection hole, 701. Internal Slideway, 1001, flexible beam structure, 1002, driving foot, 1101, bearing inner ring mounting surface, 1102, bearing cover mounting surface, 1103, limit platform, 1104, threaded surface, 1105, driving surface, 13, piezoelectric driving component, 14, left transmission part, 15, right transmission part, 16, left support part, 17, right support part, 18, first end, 19, second end, 20, accommodating cavity, 21, one-way rotation locking mechanism, 22, one-way locking component. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Embodiment 1:

[0045] As mentioned above, the aerodynamic force acting on the tail surface changes constantly during the driving process of the car. At the same time, the angle of the tail must be adjusted all the time. How to improve the positioning accuracy of the tail poses a great challenge to the design requirements of the drive actuator. The existing technology generally does not adjust the angle of the tail, either the tail is fixed, or the electric tail only unfolds a fixed angle.

[0046] See also Figure 1 , Figure 4 and Figure 5As shown, an embodiment of the present invention provides a piezoelectric driving component 13, including a rotating shaft 11 and a piezoelectric stator disk 10, wherein a driving surface 1105 is arranged in the center of the rotating shaft 11, and the piezoelectric stator disk 10 is integrally sleeved on the circumference of the driving surface 1105; a plurality of flexible beam structures 1001 are arranged on the piezoelectric stator disk 10, and each of the flexible beam structures 1001 is provided with a driving foot 1002, and the driving foot 1002 is in contact with the driving surface 1105; piezoelectric ceramics 12 are arranged at positions on both sides of the driving foot 1002 of the flexible beam structure 1001, and the piezoelectric ceramics 12 are used to extend or contract the flexible beam structure 1001 on one side, so as to provide a clockwise or counterclockwise driving force for the driving surface 1105 and the rotating shaft 11.

[0047] In some embodiments, a hollow ring structure is provided on the piezoelectric stator disk 10, and the hollow ring structure is sleeved on the circumference of the driving surface 1105; a plurality of the flexible beam structures 1001 are evenly distributed along the inner wall of the hollow ring, and there are gaps between adjacent flexible beam structures 1001; each of the flexible beam structures 1001 is connected to the inner wall of the hollow ring through a first end 18 and a second end 19.

[0048] In some embodiments, the driving foot 1002 is arranged at the central position of the flexible beam structure 1001, and piezoelectric ceramics 12 are arranged on the upper and lower sides of the flexible beam structure 1001. The piezoelectric ceramics 12 are thin-film structures; friction material is arranged on the driving surface 1105.

[0049] In some embodiments, the left and right sides of the rotating shaft 11 are symmetrically arranged along the driving surface 1105, and the left and right ends of the rotating shaft 11 are provided with a threaded surface 1104 and a limit platform 1103. The threaded surface 1104 is used for threaded connection with an external transmission member, and the limit platform 1103 is used to limit the transmission member.

[0050] In some embodiments, a bearing inner ring mounting surface 1101 and a bearing cover mounting surface 1102 are further provided on the left and right sides of the rotating shaft 11 .

[0051] like Figure 1 The middle part shown is the piezoelectric drive element 13 in this embodiment. Figure 1 The whole is a bidirectionally driven vehicle-mounted adaptive tail wing motor mechanism including a piezoelectric driver 13, which is composed of a piezoelectric driver 13 and a transmission member.

[0052] Figure 1 The piezoelectric drive element 13 in the embodiment includes a rotating shaft 11 and a piezoelectric stator disk 10. The rotating shaft 11 is symmetrically designed as a whole. Figure 5As shown, the rotating shaft 11 is a stepped shaft. A raised disc-shaped structure is provided at the center of the rotating shaft 11 , and the outer surface of the disc-shaped structure is a driving surface 1105 , which cooperates with the piezoelectric stator disk 10 structure to achieve overall driving of the rotating shaft 11 .

[0053] like Figure 4 , which shows the relative position between the rotating shaft 11 of the piezoelectric driver 13 and the piezoelectric stator disk 10 in this embodiment. In order to facilitate driving the rotating shaft 11, it is necessary to apply sufficient driving force to the driving surface 1105. Therefore, in this embodiment, a hollow annular structure is provided on the piezoelectric stator disk 10, and the hollow annular structure is sleeved around the driving surface 1105 to facilitate driving the driving surface 1105.

[0054] A plurality of flexible beam structures 1001 are arranged on the piezoelectric stator disk 10. In the embodiment, four flexible beam structures 1001 are arranged. The four flexible beam structures 1001 are evenly distributed along the inner wall of the hollow circular ring, and there is a gap between adjacent flexible beam structures 1001. The flexible beam structure 1001 is made of a flexible material with a certain elastic force, and is connected to the inner wall of the hollow circular ring structure through a first end 18 and a second end 19. A driving foot 1002 is arranged at the central position of each flexible beam structure 1001, and the driving foot 1002 is in contact with the driving surface 1105. In this embodiment, the driving foot 1002 is a force application point for applying force to the driving surface 1105. Therefore, the driving foot 1002 includes a smooth portion and a raised portion. The raised portion is arranged in the center of the smooth portion, and the driving surface 1105 can be better applied with force through the raised portion.

[0055] It can be understood that the protruding point of the protruding portion is arranged in the direction of the driving surface 1105 .

[0056] In order to make the raised part exert force on the driving surface 1105, it is necessary to use the flexible beam structure 1001 to drive the raised part to move, thereby generating a toggling action on the driving surface 1105, and helping the driving surface 1105 to drive the entire rotating shaft 11 to rotate as a whole. In order to achieve the above purpose, the flexible beam structure 1001 of this embodiment is provided with piezoelectric ceramics 12 at the positions on both sides of the driving foot 1002, and the piezoelectric ceramics 12 are used to extend or contract the flexible beam structure 1001 on one side, so as to provide a clockwise or counterclockwise driving force for the driving surface 1105 and the rotating shaft 11.

[0057] It can be understood that, taking one of the flexible beam structures 1001 as an example, piezoelectric ceramics 12 are arranged on the left and right sides of the flexible beam structure 1001. In a specific implementation, the piezoelectric ceramics 12 on the left can drive the flexible beam structure 1001 on the left to contract, and the piezoelectric ceramics 12 on the right can drive the flexible beam structure 1001 on the right to extend, so that the flexible beam structure 1001 as a whole generates a leftward force on the driving surface 1105, and the force is applied to the driving surface 1105 through the convex point of the above-mentioned convex part, thereby realizing the driving of the rotating shaft 11.

[0058] In order to achieve uniform force application, piezoelectric ceramics 12 are arranged on both upper and lower sides of the flexible beam structure 1001. The piezoelectric ceramics 12 are thin-film structures. Friction material is arranged on the driving surface 1105 to extend the service life of the equipment and facilitate the application of force.

[0059] like Figure 4 As shown, in order to facilitate the subsequent connection, coordination and driving of the transmission parts, multiple surfaces are also provided on the rotating shaft 11. Along the direction of the rotating shaft 11 gradually away from the driving surface 1105, there are also a bearing inner ring mounting surface 1101, a bearing cover mounting surface 1102, a limit platform 1103 and a threaded surface 1104.

[0060] In this embodiment, the threaded surface 1104 is used for threaded connection with an external transmission member, and the limit platform 1103 is used to limit the transmission member; the bearing inner ring mounting surface 1101 and the bearing cover mounting surface 1102 are provided to facilitate the connection of the supporting components.

[0061] The piezoelectric driver 13 of this embodiment is provided with a rotating shaft 11 and a piezoelectric stator disk 10, and a driving surface 1105 is provided in the center of the rotating shaft 11. The flexible beam structure 1001 on the piezoelectric stator disk 10 and the driving foot 1002 thereon are used to realize bidirectional driving of the driving surface 1105. The piezoelectric ceramic 12 is provided on the flexible beam structure 1001, and the piezoelectric ceramic 12 is respectively provided on the left and right sides of the driving foot 1002. By exciting the piezoelectric ceramic 12, the driving surface 1105 is driven as a whole. The present invention is cleverly designed, and the piezoelectric driver 13 can realize the separate driving of the left transmission part 14 and the right transmission part 15 located on the left and right sides of the piezoelectric driver 13, thereby realizing the adjustment of the tail wing, which is suitable for the application scenario of real-time adjustment of the angle of the vehicle tail wing, and the positioning accuracy of the tail wing is easily improved through bidirectional driving.

[0062] Embodiment 2:

[0063] This embodiment provides a bidirectionally driven vehicle-mounted adaptive tail wing motor mechanism.

[0064] The bidirectionally driven vehicle-mounted adaptive tail wing motor mechanism comprises the piezoelectric driver 13, the left transmission part 14 and the right transmission part 15 described in the first embodiment, wherein the left transmission part 14 and the right transmission part 15 are symmetrically arranged on both sides of the piezoelectric driver 13, wherein:

[0065] The left transmission part 14 and the right transmission part 15 both include a transmission support plate 1, on which an output shaft 401 is arranged, and one end of the output shaft 401 is provided with a receiving cavity 20 adapted to the rotating shaft 11 of the piezoelectric driver 13, and a threaded structure adapted to the threaded surface 1104 is arranged on the side of the receiving cavity 20 close to the rotating shaft 11; the other end of the output shaft 401 is used to connect an external load;

[0066] It also includes a mounting seat, and the bottoms of the left transmission part 14 and the right transmission part 15 are both slidably connected to the mounting seat.

[0067] In this embodiment, it can be understood that the bidirectionally driven vehicle-mounted adaptive rear wing can install the rear wing structure on the accommodating cavity 20 as needed, and can be connected thereto by means of pins or screws. When the accommodating cavity 20 is driven to rotate, the vehicle-mounted adaptive rear wing is driven to rotate to achieve a change in angle.

[0068] The integrated tail wing mechanism designed with piezoelectric ceramic materials in the embodiment of the present invention has the advantages of simple structure and flexibility. It can be designed according to installation and application requirements so that its size and shape meet the use requirements, and the provided piezoelectric integrated tail wing has high control accuracy and good control effect.

[0069] like Figure 1 As shown, in order to cooperate with the transmission member, a receiving cavity 20 is provided on the output shaft 401 of the transmission member, and a threaded structure is provided at the end of the receiving cavity 20, that is, the receiving cavity 20 forms a threaded connection hole 402, which is matched with the threaded surface 1104 at the end of the rotating shaft 11 of the piezoelectric driving member 13. In this embodiment, an external thread is provided on the threaded surface 1104, and an internal thread is provided in the threaded connection hole 402, and the external thread and the internal thread are matched.

[0070] In the initial position, the threaded connection holes 402 of the left transmission part 14 and the right transmission part 15 are in contact with the corresponding threaded surface 1104 of the shaft 11, and a portion of the threaded surface 1104 at the end of the shaft 11 extends into the threaded connection hole 402, which facilitates the subsequent bidirectional drive. Otherwise, if the two are not in contact at the initial position, bidirectional drive will not be possible.

[0071] In some embodiments, in order to achieve the locking function, a transmission ratchet 4 is provided on the transmission support plate 1, and the transmission ratchet 4 is provided on the inner side of the output shaft 401, and the transmission ratchet 4 and the output shaft 401 are an integrally formed structure; a first bearing 5 is provided on the end surface of one side of the transmission support plate 1, and a first bearing gland 6 is provided on the outer side of the first bearing 5;

[0072] The outer ring of the first bearing 5 is installed in the bearing installation hole 103 of the transmission support plate 1 , and the inner ring of the first bearing 5 is installed on the output shaft 401 .

[0073] The transmission ratchet 4 and the output shaft 401 are formed in an integral structure in order to achieve a better self-locking effect, and the position locking of the output shaft 401 is achieved by utilizing the one-way locking function of the transmission ratchet 4 .

[0074] After the piezoelectric stator disk 10 drives the rotating shaft 11 to rotate:

[0075] When the shaft 11 rotates clockwise, the left threaded surface 1104 of the shaft 11 is screwed into the threaded connection hole 402 of the left transmission part 14 until the limit platform 1103 contacts the ratchet wheel to achieve limit position, and then drives the output shaft 401 on the ratchet wheel to rotate clockwise;

[0076] When the rotating shaft 11 rotates counterclockwise, the left end of the rotating shaft 11 will screw out of the threaded connection hole 402 on the transmission ratchet 4 of the left transmission part 14, and screw into the transmission ratchet 4 of the right transmission part 15 from the right side of the rotating shaft 11, thereby driving the output shaft 401 on the right side to rotate, thereby realizing bidirectional drive and self-locking.

[0077] In some embodiments, a one-way rotation locking mechanism 21 is provided on the left transmission part 14 and the right transmission part 15, and the one-way rotation locking mechanism 21 includes a transmission ratchet 4 and a one-way locking member 22, and the one-way locking member 22 includes a transmission self-locking block 3 rotatably connected to the transmission support plate 1, and the transmission self-locking block 3 is adapted to the ratchet teeth of the transmission ratchet 4, and the transmission self-locking block 3 is connected to the transmission support plate 1 through a transmission spring 2; multiple one-way locking members 22 are arranged along the circumference of the transmission ratchet 4.

[0078] In some embodiments, it also includes a symmetrically arranged left support portion 16 and a right support portion 17, wherein the left support portion 16 is arranged between the piezoelectric driver 13 and the left transmission portion 14, and the right support portion 17 is arranged between the piezoelectric driver 13 and the right transmission portion; wherein the left support portion 16 and the right support portion 17 both include a support plate 7 of the rotating shaft 11, an inner slideway 701 is arranged on the support plate 7 of the rotating shaft 11, a second bearing 8 is arranged in the inner slideway 701, and a second bearing gland 9 is arranged on the outer side of the support bearing;

[0079] The outer ring of the second bearing 8 is installed in the inner slideway 701 , the inner ring of the second bearing 8 is installed on the bearing inner ring mounting surface 1101 of the rotating shaft 11 , and the second bearing pressure cover 9 is installed on the bearing cover mounting surface 1102 of the rotating shaft 11 .

[0080] In addition, a mounting seat may be provided at the bottom of the overall structure, and the left transmission part 14, the right transmission part 15, the left support part 16, and the right support part 17 may be mounted on the mounting seat together.

[0081] Next, the technical solution of the second embodiment will be explained in detail with reference to the accompanying drawings.

[0082] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the bidirectionally driven vehicle-mounted adaptive tail wing motor mechanism of this embodiment includes: a left transmission part 14, a left support part 16, a piezoelectric driver 13, a right support part 17, and a right transmission part 15.

[0083] The left transmission part 14 is composed of a transmission support plate 1, a transmission spring 2, a transmission self-locking block 3, a transmission ratchet 4, a first bearing 5 and a first bearing cover 6. The drive support plate is provided with a spring pull block 101, a spring mounting hole 302102 and a bearing mounting hole 103. The spring pull block 101 is a U-shaped block structure, on which a spring mounting hole 302102 is provided, and the drive spring is connected to the spring mounting hole 302102 by a pin connection; the bearing mounting hole 103 is located inside the left side of the transmission support plate 1, and the outer ring of the bearing is installed in the bearing mounting hole 103; the drive self-locking block is provided with a rotating hole 301 and a spring mounting hole 302102, and the self-locking block is connected to the transmission by passing the pin through the rotating hole 301 The support plate 1 is connected, and the spring mounting hole 302102 is connected to the spring in a pin connection manner; one end of the driving spring is installed in the spring mounting hole 302102 of the transmission support plate 1, and the other end is installed in the spring mounting hole 302102 of the self-locking block; the transmission ratchet 4 is provided with an output shaft 401 and a threaded connection hole 402 in the middle, and the ratchet is installed in the inner ring of the bearing through the output shaft 401 in the middle; the first bearing 5 can choose a deep groove ball bearing, the outer ring of which is installed in the bearing mounting hole 103 of the support plate, and the inner ring is installed on the output shaft 401 of the ratchet; the first bearing cover 6 is an annular structure, which can be installed on the left end face of the support plate by a threaded connection, and contacts with the outer ring of the first bearing 5 to play a limiting role.

[0084] The left support part 16 includes a support plate 7 of the rotating shaft 11, a second bearing 8 and a second bearing pressure cover 9. The support plate 7 of the rotating shaft 11 is provided with an inner slide 701. The outer ring of the support bearing is installed in the inner slide 701 of the support plate and can slide along the inner slide 701. The inner ring is installed on the bearing inner ring mounting surface 1101 of the rotating shaft 11 of the piezoelectric drive unit; the second bearing pressure cover 9 is installed on the bearing cover mounting surface 1102 of the rotating shaft 11 of the piezoelectric drive unit by means of a threaded connection, and plays a limiting role on the inner ring of the second bearing 8.

[0085] The piezoelectric driving part includes a piezoelectric stator disk 10, a rotating shaft 11 and a piezoelectric ceramic 12. The piezoelectric stator disk 10 includes a flexible beam structure 1001 and a driving foot 1002. The piezoelectric ceramic 12 is pasted on both sides of the flexible beam structure 1001; the rotating shaft 11 is a stepped shaft structure, and a bearing inner ring mounting surface 1101, a bearing cover mounting surface 1102, a limit platform 1103, a threaded surface 1104 and a driving surface 1105 are provided at its upper end.

[0086] The inner ring of the second bearing 8 is installed on the bearing inner ring mounting surface 1101 of the rotating shaft 11, and the second bearing cover 9 is installed on the bearing cover mounting surface 1102 of the rotating shaft 11 of the piezoelectric drive unit by means of a threaded connection; the threaded surface 1104 is provided with an external thread, which can be screwed into the threaded connection hole 402 on the ratchet, and after being screwed in to a certain depth, it is limited by the limit platform 1103; the driving surface 1105 is in contact with the driving foot 1002, and in order to improve the driving effect, a certain friction material can be pasted on the driving surface 1105; the piezoelectric ceramic 12 is a rectangular thin sheet structure, which can be installed on both sides of the flexible beam structure 1001 on the piezoelectric stator disk 10 by means of pasting.

[0087] The right supporting part 17 and the right transmission part 15 are symmetrically arranged with the left supporting part 16 and the left transmission part 14 , and the specific structure and installation method will not be described in detail.

[0088] Specific implementation and working principle:

[0089] like Figure 6 As shown, by applying a certain voltage to the piezoelectric ceramic 12, it can be controlled to extend or contract. Figure 6 When the four piezoelectric ceramics 12 are excited by the same method, the driving foot 1002 can realize the driving force in the clockwise direction. By changing the voltage excitation method, such as Figure 7 As shown, the driving foot 1002 can generate a counterclockwise driving force.

[0090] like Figure 6 As shown:

[0091] First, the four piezoelectric ceramics stretch at the same time, the piezoelectric beam bends and deforms, and the driving foot is lifted up (such as Figure 6 as shown in a in );

[0092] After that, the two piezoelectric ceramics on the right side shorten, and the driving foot swings to the right under the action of torque to drive (such as Figure 6 As shown in b);

[0093] After that, the two piezoelectric ceramics on the left also shorten, and the driving foot will reach the lowest point (such as Figure 6 (as shown in c in the figure);

[0094] After that, the piezoelectric sheet on the right side extends again, and the driving foot swings to the left under the action of the torque, completing the entire cycle (such as Figure 6 d in the figure).

[0095] like Figure 7 As shown:

[0096] First, the four piezoelectric ceramics stretch at the same time, the piezoelectric beam bends and deforms, and the driving foot is lifted up (such as Figure 7 as shown in a in );

[0097] After that, the two piezoelectric ceramics on the left side shorten, and the driving foot swings to the left under the action of torque to drive (such as Figure 7 As shown in b);

[0098] After that, the two piezoelectric ceramics on the right side also shorten, and the driving foot will reach the lowest point (such as Figure 7 (as shown in c in the figure);

[0099] After that, the piezoelectric sheet on the left side extends, and the driving foot swings to the right under the action of torque, completing the entire cycle (such as Figure 7 d in the figure).

[0100] The four driving feet 1002 are used to drive the driving surface 1105 on the rotating shaft 11, so as to realize the clockwise or counterclockwise rotation of the rotating shaft 11:

[0101] When rotating clockwise, the left threaded surface 1104 of the rotating shaft 11 is screwed into the threaded connection hole 402 on the transmission ratchet 4 of the left transmission part 14 until the limit platform 1103 contacts the ratchet to achieve limit, and then drives the output shaft 401 on the ratchet to rotate clockwise;

[0102] When the driving foot 1002 drives the shaft 11 to rotate counterclockwise, the left end of the shaft 11 will screw out of the threaded connection hole 402 on the ratchet and screw into the ratchet of the right transmission part 15 from the right side of the shaft 11, thereby driving the right side to rotate, thereby realizing bidirectional drive and self-locking.

[0103] Based on the designed piezoelectric-driven on-board adaptive tail wing motor mechanism, the piezoelectric intelligent structure and ratchet mechanism are integrated and applied to the design of the on-board adaptive tail wing actuator, which not only enables the tail wing to be adjusted in real time during driving, but also can achieve self-locking at the set angle, thereby greatly improving the position accuracy of the tail wing. It has good feasibility and practicality, is a better mechanism selection scheme for the on-board adaptive tail wing, and provides a new idea for solving the design of the on-board adaptive tail wing structure.

[0104] Embodiment three:

[0105] This embodiment provides a bidirectional driving method for a piezoelectric driver. Figure 6 , Figure 7 , and the above Figure 6 and Figure 7 The description part can help to better understand the present embodiment.

[0106] The bidirectional driving method of the piezoelectric actuator includes a forward driving method and a reverse driving method:

[0107] The forward driving method comprises the following steps:

[0108] The piezoelectric ceramics on both sides of the driving foot of the flexible beam structure are controlled to extend simultaneously, so that the flexible beam structure is bent and deformed, and the driving foot is lifted up;

[0109] Control the piezoelectric ceramic of the flexible beam structure located at the first side of the driving foot to extend and the second side to shorten, so that the driving foot swings toward the second side to generate a driving force;

[0110] The piezoelectric ceramic controlling the flexible beam structure at the first side of the driving foot is also shortened, and the driving foot drops to the lowest point;

[0111] The piezoelectric ceramic of the flexible beam structure located at the second side of the driving foot is controlled to extend again, and the driving foot swings toward the first side to generate a driving force.

[0112] The reverse driving method comprises the following steps:

[0113] The piezoelectric ceramics on both sides of the driving foot of the flexible beam structure are controlled to extend simultaneously, so that the flexible beam structure is bent and deformed, and the driving foot is lifted up;

[0114] Control the piezoelectric ceramic of the flexible beam structure located at the first side of the driving foot to shorten and the second side to extend, so that the driving foot swings toward the first side to generate a driving force;

[0115] The piezoelectric ceramic controlling the flexible beam structure at the second side of the driving foot is also shortened, and the driving foot drops to the lowest point;

[0116] The piezoelectric ceramic of the flexible beam structure located at the first side of the driving foot is controlled to extend again, and the driving foot swings to the second side to generate a driving force.

[0117] It can be understood that the elongation or contraction of the piezoelectric ceramic can be controlled by passing positive and negative currents through it.

[0118] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0119] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A piezoelectric drive element, characterized in that: It includes a rotating shaft and a piezoelectric stator disk, a driving surface is arranged in the center of the rotating shaft, and the piezoelectric stator disk is integrally sleeved on the circumference of the driving surface; a plurality of flexible beam structures are arranged on the piezoelectric stator disk, each of the flexible beam structures is arranged with a driving foot, and the driving foot is in contact with the driving surface; piezoelectric ceramics are arranged at positions on both sides of the driving foot of the flexible beam structure, and the piezoelectric ceramics are used to extend or contract the flexible beam structure on one side, so as to provide clockwise or counterclockwise driving force for the driving surface and the rotating shaft.

2. The piezoelectric driver according to claim 1, characterized in that: A hollow circular ring structure is arranged on the piezoelectric stator disk, and the hollow circular ring structure is sleeved on the circumferential side of the driving surface; a plurality of the flexible beam structures are evenly distributed along the inner wall of the hollow circular ring, and there is a gap between adjacent flexible beam structures; each of the flexible beam structures is connected to the inner wall of the hollow circular ring through a first end and a second end.

3. The piezoelectric driver according to claim 1, characterized in that: The driving foot is arranged at the central position of the flexible beam structure. The upper and lower sides of the flexible beam structure are both provided with piezoelectric ceramics, and the piezoelectric ceramics are thin-sheet structures. The driving surface is provided with friction material.

4. The piezoelectric driver according to claim 1, characterized in that: The left and right sides of the rotating shaft are symmetrically arranged along the driving surface. The left and right ends of the rotating shaft are both provided with threaded surfaces and limit platforms. The threaded surfaces are used for threaded connection with external transmission parts, and the limit platforms are used for limiting the transmission parts.

5. The piezoelectric driver according to claim 4, characterized in that: The left and right sides of the rotating shaft are also provided with a bearing inner ring mounting surface and a bearing cover mounting surface.

6. A bidirectionally driven vehicle-mounted adaptive tail wing motor mechanism, characterized in that: The device comprises a piezoelectric driver according to any one of claims 1 to 5, a left transmission part and a right transmission part, wherein the left transmission part and the right transmission part are symmetrically arranged on both sides of the piezoelectric driver, wherein: The left transmission part and the right transmission part both include a transmission support plate, an output shaft is arranged on the transmission support plate, one end of the output shaft is provided with a receiving cavity adapted to the rotating shaft of the piezoelectric drive member, and a thread structure adapted to the thread surface is arranged on the side of the receiving cavity close to the rotating shaft; the other end of the output shaft is used to connect an external load member; It also includes a mounting seat, and the bottoms of the left transmission part and the right transmission part are both slidably connected to the mounting seat.

7. The vehicle-mounted adaptive tail wing motor mechanism based on piezoelectric drive according to claim 6 is characterized in that: A one-way rotation locking mechanism is provided on both the left transmission part and the right transmission part, and the one-way rotation locking mechanism includes a transmission ratchet and a one-way locking piece. The transmission ratchet is arranged on the inner side of the output shaft, and the one-way locking piece includes a transmission self-locking block rotatably connected to a transmission support plate, the transmission self-locking block is adapted to the ratchet teeth of the transmission ratchet, and the transmission self-locking block is connected to the transmission support plate through a transmission spring; a plurality of one-way locking pieces are arranged along the circumference of the transmission ratchet.

8. The vehicle-mounted adaptive tail wing motor mechanism based on piezoelectric drive according to claim 7 is characterized in that: The transmission ratchet and the output shaft are an integrally formed structure; a first bearing is arranged on the end surface of one side of the transmission support plate, and a first bearing gland is arranged on the outer side of the first bearing; The outer ring of the first bearing is installed in the bearing installation hole of the transmission support plate, and the inner ring of the first bearing is installed on the output shaft.

9. The vehicle-mounted adaptive tail wing motor mechanism based on piezoelectric drive according to claim 6, characterized in that: It also includes a left support part and a right support part that are symmetrically arranged, the left support part is arranged between the piezoelectric drive member and the left transmission member, and the right support part is arranged between the piezoelectric drive member and the right transmission member; wherein the left support part and the right support part both include a shaft support plate, an inner slideway is arranged on the shaft support plate, a second bearing is arranged in the inner slideway, and a second bearing gland is arranged on the outer side of the support bearing; The outer ring of the second bearing is installed in the inner slideway, the inner ring of the second bearing is installed on the bearing inner ring installation surface of the rotating shaft, and the second bearing pressure cover is installed on the bearing cover installation surface of the rotating shaft.

10. A bidirectional driving method for a piezoelectric driver, characterized in that: Including forward drive method and reverse drive method: The forward driving method comprises the following steps: The piezoelectric ceramics on both sides of the driving foot of the flexible beam structure are controlled to extend simultaneously, so that the flexible beam structure is bent and deformed, and the driving foot is lifted up; Control the piezoelectric ceramic of the flexible beam structure located at the first side of the driving foot to extend and the second side to shorten, so that the driving foot swings toward the second side to generate a driving force; The piezoelectric ceramic controlling the flexible beam structure at the first side of the driving foot is also shortened, and the driving foot drops to the lowest point; The piezoelectric ceramic of the flexible beam structure located at the second side of the driving foot is controlled to extend again, and the driving foot swings toward the first side to generate a driving force.

Images