A giant magnetostrictive motor

Abstract

An embodiment of the present invention discloses a giant magnetostrictive motor, which includes a brake body, a rotating shaft and a push rod; the brake body includes a housing, a first giant magnetostrictive material rod and an a coil, the first giant magnetostrictive material rod and the a coil are both arranged inside the housing, and the first giant magnetostrictive material rod passes through the a coil; one end of the push rod is hinged to the first giant magnetostrictive material rod, and the other end is connected to the rotating shaft; the first giant magnetostrictive material rod elongates and pushes the push rod to move; the first giant magnetostrictive material rod shortens and drives the push rod to reset, and the rotating shaft is stationary. The present invention provides a giant magnetostrictive motor, which not only has a large output force and output torque, but also has a high control accuracy. Through a conversion mechanism, the small displacement and large output force of the brake body are converted into a large displacement, large output force or large torque device with infinitely accumulable displacement, expanding the application of giant magnetostrictive materials.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of motors, and particularly to a giant magnetostrictive motor. Background Art

[0002] Giant magnetostrictive materials have the advantage of large output force. Each square centimeter of the material can generate 1700 Newtons of force. However, existing giant magnetostrictive actuators are generally actuators with small-displacement reciprocating motion. The displacement is generally not more than a few hundred micrometers. The small displacement limits the application range.

[0003] In order to expand the displacement range of giant magnetostrictive actuators, previous research has developed a giant magnetostrictive peristaltic linear motor. In this motor, the outside of the giant magnetostrictive rod is tightly connected to a long cylinder. During the process of the magnetic field gradually transferring from one end of the giant magnetostrictive material to the other end, the magnetized giant magnetostrictive material becomes thinner and elongates. After the magnetic field disappears, this part of the magnetostrictive material becomes thicker and is tightly fixed on the cylinder. In this way, a small displacement of the giant magnetostrictive material can be achieved in one cycle. By magnetizing the giant magnetostrictive material from one end to the other end multiple times, the accumulation of displacement can be realized, that is, large displacement can be achieved. However, both the displacement distance and the magnitude of the output force are limited. Moreover, this giant magnetostrictive peristaltic linear motor is still in the research and development stage and has not formed practical applications. At present, the problems of the existing giant magnetostrictive peristaltic linear motor are as follows: (1) The shrinkage in the diameter direction of the giant magnetostrictive material is very small. Therefore, extremely strict processing accuracy requirements are imposed on the dimensions of the giant magnetostrictive material and the outer cylinder wall in terms of the cooperation between giant magnetostriction and the outer cylinder closing. This poses a harsh requirement for processing. Especially when a larger displacement is required and the length of the outer cylinder is longer, it is very difficult to meet such processing requirements; (2) The giant magnetostrictive material and the outer cylinder wall are fixed by static friction, and the hard and brittle giant magnetostrictive material is easily damaged during long-term operation; (3) The output force is limited by the static friction between the giant magnetostrictive material and the outer cylinder wall, so a larger output force cannot be generated; (4) Due to limitations such as processing accuracy, it is impossible to manufacture an actuator with too large a displacement, and it is even more impossible to manufacture a large-output-force actuator with infinite stroke. Summary of the Invention

[0004] Therefore, the embodiments of the present invention provide a giant magnetostrictive motor to solve the problem of small displacement of the giant magnetostrictive actuator in the prior art.

[0005] In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0006] The embodiments of the present invention provide a giant magnetostrictive motor, which includes a brake body, a rotating shaft and a push rod;

[0007] The brake body includes a housing, a first giant magnetostrictive material rod, and an a coil. The first giant magnetostrictive material rod and the a coil are both disposed inside the housing, and the first giant magnetostrictive material rod passes through the a coil. Under the action of an alternating magnetic field, the first giant magnetostrictive material rod repeatedly elongates and shortens;

[0008] One end of the push rod is hinged to the first giant magnetostrictive material rod, and the other end is connected to the rotating shaft;

[0009] The push rod locks the rotating shaft. The first giant magnetostrictive material rod elongates and pushes the push rod to move, and the push rod drives the rotating shaft to rotate;

[0010] The push rod releases the rotating shaft. The first giant magnetostrictive material rod shortens and drives the push rod to reset, and the rotating shaft stops;

[0011] In this way, the brake body drives the rotating shaft to continuously rotate.

[0012] Preferably, the giant magnetostrictive motor further includes a first hinge, a second hinge, and a hinge lever. One end of the hinge lever is hinged to the push rod, the other end of the hinge lever is hinged to the housing through the first hinge, the second hinge is located between the push rod and the first hinge and close to the first hinge, and the hinge lever is hinged to the first giant magnetostrictive material rod through the second hinge.

[0013] Preferably, the brake body further includes a first disc spring and a first pressure screw; the first pressure screw is installed at one end of the first giant magnetostrictive material rod away from the hinge lever, the first disc spring is installed at one end of the first giant magnetostrictive material rod close to the hinge lever, and the first pressure screw presses the first giant magnetostrictive material rod and makes the first disc spring in a compressed state.

[0014] Preferably, the giant magnetostrictive motor further includes a first locking device; the push rod locks or releases the rotating shaft through the first locking device.

[0015] Preferably, the first locking device is a one-way bearing. The rotating shaft is fixed to the inner ring of the one-way bearing, and the push rod is fixed to the outer ring of the one-way bearing;

[0016] When the push rod moves, the push rod locks the rotating shaft to rotate through the one-way bearing;

[0017] When the push rod moves in the reverse direction, the push rod drives the one-way bearing to rotate, and the one-way bearing releases the rotating shaft.

[0018] Preferably, the first locking device includes a first semi-conductor, a second semi-conductor and a b coil, and both the first semi-conductor and the second semi-conductor are fixed to the push rod;

[0019] The first semi-conductor and the second semi-conductor are oppositely arranged outside the rotating shaft, and a gap is formed between the first semi-conductor and the second semi-conductor; b coils are sleeved outside both the first semi-conductor and the second semi-conductor;

[0020] When an electric current passes through the b coil, the first semi-conductor and the second semi-conductor attract each other and lock the rotating shaft; when no electric current passes through the b coil, the first semi-conductor and the second semi-conductor release the rotating shaft.

[0021] Preferably, the first locking device includes a second giant magnetostrictive material rod, a c coil, a second pressure screw, an a bearing, a second disc spring and an output rod;

[0022] The inner ring of the a bearing is fixed to the rotating shaft, and the outer ring of the a bearing is fixed to the push rod;

[0023] A second giant magnetostrictive material rod is arranged inside one end of the push rod close to the rotating shaft, and a c coil is sleeved outside the second giant magnetostrictive material rod;

[0024] One end of the second giant magnetostrictive material rod is installed with the second pressure screw, the other end of the second giant magnetostrictive material rod is fixed to the output rod, and a second disc spring is sleeved at one end of the output rod close to the second giant magnetostrictive material rod; the second pressure screw presses the second giant magnetostrictive material rod, and the second disc spring is in a compressed state;

[0025] A gap is provided between the output shaft and the rotating shaft, and the push rod releases the rotating shaft;

[0026] When an electric current passes through the c coil, the second giant magnetostrictive material rod elongates so that the output rod presses against the rotating shaft, and the push rod locks the rotating shaft.

[0027] Preferably, the giant magnetostrictive motor further includes a locking arm and a motor housing, the rotating shaft is arranged inside the motor housing and extends out of the motor housing, one end of the locking arm is fixed to the motor housing, and the other end locks or releases the rotating shaft through a one-way bearing.

[0028] Preferably, the giant magnetostrictive motor further includes a locking arm and a motor housing, the rotating shaft is arranged inside the motor housing and extends out of the motor housing, one end of the locking arm is fixed to the motor housing, and the other end locks or releases the rotating shaft through the first locking device;

[0029] The first locking device includes a first semi-conductor, a second semi-conductor and a b coil, and both the first semi-conductor and the second semi-conductor are fixed to the locking arm;

[0030] The first semi-conductor and the second semi-conductor are oppositely arranged outside the rotating shaft, and a gap is formed between the first semi-conductor and the second semi-conductor; b coils are sleeved outside both the first semi-conductor and the second semi-conductor;

[0031] When an electric current passes through the b coil, the first semi-conductor and the second semi-conductor attract each other and lock the rotating shaft; when no electric current passes through the b coil, the first semi-conductor and the second semi-conductor release the rotating shaft.

[0032] Preferably, the giant magnetostrictive motor further includes a locking arm and a motor housing. The rotating shaft is arranged inside the motor housing and extends out of the motor housing. One end of the locking arm is fixed to the motor housing, and the other end locks or releases the rotating shaft through the first locking device;

[0033] The first locking device includes a second giant magnetostrictive material rod, a c coil, a second pressure screw, an a bearing, a second disc spring and an output rod;

[0034] The inner ring of the a bearing is fixed to the rotating shaft, and the outer ring of the a bearing is fixed to the locking arm;

[0035] A second giant magnetostrictive material rod is arranged inside one end of the locking arm close to the rotating shaft, and a c coil is sleeved outside the second giant magnetostrictive material rod;

[0036] One end of the second giant magnetostrictive material rod is installed with the second pressure screw, the other end of the second giant magnetostrictive material rod is fixed to the output rod, and a second disc spring is sleeved on one end of the output rod close to the second giant magnetostrictive material rod; the second pressure screw presses the second giant magnetostrictive material rod, and the second disc spring is in a compressed state;

[0037] A gap is arranged between the output shaft and the rotating shaft, and the locking arm releases the rotating shaft;

[0038] When an electric current passes through the c coil, the second giant magnetostrictive material rod elongates so that the output rod presses against the rotating shaft, and the locking arm locks the rotating shaft.

[0039] The embodiments of the present invention have the following advantages:

[0040] The giant magnetostrictive motor provided by the embodiment of the present invention includes a brake body, a rotating shaft, and a push rod. When the push rod locks the rotating shaft, the first giant magnetostrictive material rod elongates and pushes the push rod to move, and the push rod drives the rotating shaft to rotate; when the push rod releases the rotating shaft, the first giant magnetostrictive material rod shortens and drives the push rod to reset, and the rotating shaft stops; and so on. The brake body drives the rotating shaft to continuously rotate, so as to realize that the displacement of the giant magnetostrictive material can be infinitely accumulated, and further realize the output of large displacement, large output force or large torque. It not only has a large output force and output torque, but also has high control accuracy, effectively expanding the application of the giant magnetostrictive material. Description of the Drawings

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0042] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope covered by the technical content disclosed in the present invention without affecting the effects that the present invention can produce and the purposes that can be achieved.

[0043] Figure 1 It is a schematic structural diagram of a giant magnetostrictive motor provided by Embodiment 1 of the present invention;

[0044] Figure 2 It is a three-dimensional structural diagram of a giant magnetostrictive motor provided by Embodiment 1 of the present invention;

[0045] Figure 3 It is a schematic structural diagram of a giant magnetostrictive motor provided by Embodiment 2 of the present invention;

[0046] Figure 4 It is a three-dimensional structural diagram of a giant magnetostrictive motor provided by Embodiment 3 of the present invention;

[0047] Figure 5 It is a top view of a giant magnetostrictive motor provided by Embodiment 3 of the present invention;

[0048] Figure 6 It is a reference diagram of the use state of a giant magnetostrictive motor provided by Embodiment 3 of the present invention;

[0049] Figure 7Schematic structural diagram of a first locking device of a giant magnetostrictive motor provided in Embodiment 3 of the present invention;

[0050] Figure 8 Another schematic structural diagram of a first locking device of a giant magnetostrictive motor provided in Embodiment 3 of the present invention;

[0051] In the figure: 1. Brake body; 11. Housing; 12. First giant magnetostrictive material rod; 13. a coil; 14. First disc spring; 15. First pressure screw; 2. Rotating shaft; 3. Push rod; 4. First hinge; 5. Second hinge; 6. Hinge lever; 7. First locking device; 711. First semi-conductor; 712. Second semi-conductor; 713. b coil; 721. Second giant magnetostrictive material rod; 722. c coil; 723. Second pressure screw; 724. a bearing; 725. Second disc spring; 726. Output rod; 8. Locking arm; 9. Motor housing; 10. Flexible rod. Detailed implementation manners

[0052] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0053] Embodiment 1

[0054] As Figure 1 and Figure 2 shown, this embodiment provides a giant magnetostrictive motor, which includes a brake body 1, a rotating shaft 2 and a push rod 3.

[0055] Specifically, the brake body 1 includes a housing 11, a first giant magnetostrictive material rod 12 and an a coil 13. The first giant magnetostrictive material rod 12 and the a coil 13 are both arranged inside the housing 11, and the first giant magnetostrictive material rod 12 passes through the a coil 13. Under the action of an alternating magnetic field, the first giant magnetostrictive material rod 12 undergoes repeated elongation and shortening; one end of the push rod 3 is hinged to the first giant magnetostrictive material rod 12, and the other end is connected to the rotating shaft 2. There are two states between the push rod 3 and the rotating shaft 2, that is, the push rod 3 locks the rotating shaft 2 or the push rod 3 releases the rotating shaft 2. It should be noted that the function of the brake body 1 is to push the push rod 3 to drive the rotating shaft 2 to rotate, or the brake body 1 drives the push rod 3 to reset.

[0056] In this embodiment, when the push rod 3 locks the rotating shaft 2, the first giant magnetostrictive material rod 12 elongates and pushes the push rod 3 to move, and the push rod 3 drives the rotating shaft 2 to rotate; when the push rod 3 releases the rotating shaft 2, the first giant magnetostrictive material rod 12 shortens and drives the push rod 3 to reset, and the rotating shaft 2 stops; and so on. The brake body 1 drives the rotating shaft 2 to continuously rotate, that is, the brake body 1 drives the rotating shaft 2 to continuously rotate, so as to realize that the displacement of the giant magnetostrictive material can be infinitely accumulated, and further realize the output of large displacement, large output force or large torque.

[0057] Preferably, the brake body 1 further includes a first disc spring 14 and a first pressing screw 15; the first pressing screw 15 is installed at one end of the first giant magnetostrictive material rod 12 away from the hinge lever 6, and the first disc spring 14 is installed at one end of the first giant magnetostrictive material rod 12 close to the hinge lever 6. The first pressing screw 15 presses the first giant magnetostrictive material rod 12 and makes the first disc spring 14 in a compressed state, which makes the distance that the brake pushes the push rod 3 to move more accurate.

[0058] Further preferably, the giant magnetostrictive motor further includes a first locking device 7; the push rod 3 locks or releases the rotating shaft 2 through the first locking device 7, which makes the operation of the push rod 3 locking or releasing the rotating shaft 2 simpler.

[0059] It should be noted that the first locking device 7 has various structures to realize the locking and releasing of the rotating shaft 2 by the push rod 3.

[0060] 1. The first locking device 7 is a one-way bearing, the rotating shaft 2 is fixed to the inner ring of the one-way bearing, and the push rod 3 is fixed to the outer ring of the one-way bearing.

[0061] When the push rod 3 moves, the push rod 3 locks the rotating shaft 2 to rotate through the one-way bearing.

[0062] When the push rod 3 moves in the reverse direction, the push rod 3 drives the one-way bearing to rotate, and the one-way bearing releases the rotating shaft 2.

[0063] It should be noted that various commercially available one-way bearings have a one-way locking function, that is, when the one-way bearing is pushed in one direction and can rotate freely, it cannot be pushed to rotate in the other direction. When the first locking device 7 uses a one-way bearing and this one-way bearing allows free rotation in the reverse direction, then when the one-way bearing rotates forward, the one-way bearing and the rotating shaft 2 are in a locked state. That is, when the magnetostrictive actuator generates a thrust to push the one-way bearing 3 to rotate forward, it will drive the optical axis to rotate and can do work externally; when the brake body 1 contracts, the one-way bearing is in a loose state relative to the rotating shaft 2, so the one-way bearing and the push rod 3 are pulled back to the initial position, but the rotating shaft 2 cannot be pulled back to the initial position. Of course, we know that to make the one-way bearing reach the rotation-locked state requires a large enough displacement. If the displacement is too small, the one-way bearing cannot reach the locking clearance requirement and the one-way bearing cannot be locked. Each type of one-way bearing has different requirements for the locking clearance. One can choose a one-way bearing with a small clearance, or design a large enough displacement when designing the giant magnetostrictive actuator or achieve a large displacement through a displacement amplification mechanism to meet the locking clearance requirement of the one-way bearing.

[0064] 2. Refer to Figure 8 , the first locking device 7 includes a first semi-conductor 711, a second semi-conductor 712 and a b coil 713, and both the first semi-conductor 711 and the second semi-conductor 712 are fixed to the push rod 3.

[0065] Among them, the first semi-conductor 711 and the second semi-conductor 712 are oppositely arranged outside the rotating shaft 2, and a gap is formed between the first semi-conductor 711 and the second semi-conductor 712; b coils 713 are sleeved outside both the first semi-conductor 711 and the second semi-conductor 712.

[0066] When an electric current passes through the b coil 713, the first semi-conductor 711 and the second semi-conductor 712 attract each other and lock the rotating shaft 2; when no electric current passes through the b coil 713, the first semi-conductor 711 and the second semi-conductor 712 release the rotating shaft 2.

[0067] 3. As shown in Fig. 7, the first locking device 7 includes a second giant magnetostrictive material rod 721, a c coil 722, a second pressure screw 723, an a bearing 724, a second disc spring 725 and an output rod 726.

[0068] Among them, the inner ring of the a bearing 724 is fixed to the rotating shaft 2, and the outer ring of the a bearing 724 fixes the push rod 3; a second giant magnetotropic material rod 721 is arranged inside the end of the push rod 3 close to the rotating shaft 2, and a c coil 722 is sleeved on the outer side of the second giant magnetotropic material rod 721; a second pressure screw 723 is installed at one end of the second giant magnetotropic material rod 721, and an output rod 726 is fixed at the other end of the second giant magnetotropic material rod 721, and a second butterfly spring 725 is sleeved on the end of the output rod 726 close to the second giant magnetotropic material rod 721; the second pressure screw 723 applies pressure to the second giant magnetotropic material rod 721, and the second butterfly spring 725 is in a compressed state.

[0069] When the c coil 722 is not energized, a gap is provided between the output shaft and the rotating shaft 2 , and the push rod 3 releases the rotating shaft 2 .

[0070] When the c coil 722 is energized, the second giant magnetotropic material rod 721 is extended so that the output rod 726 presses against the rotating shaft 2, and the push rod 3 locks the rotating shaft 2.

[0071] It should be noted that Figure 7 and Figure 8 The structure diagram of the locking arm 8 holding or releasing the rotating shaft 2 through the first locking device 7 is shown. The structure of the push rod 3 holding or releasing the rotating shaft 2 through the first locking device 7 is the same as that of the locking arm 8. Figure 7 and Figure 8 That's it.

[0072] As mentioned above, the three structures of the first locking device 7 can all realize locking or releasing the rotating shaft 2 by the push rod 3, and the operation is relatively convenient.

[0073] In the giant magnetostrictive motor provided in this embodiment, the brake body 1 drives the rotating shaft 2 to rotate continuously, so that the displacement of the giant magnetostrictive material can be accumulated infinitely, and then the output of large displacement, large output force or large torque is achieved. Not only the output force and output torque are large, but also the control accuracy is high, which effectively expands the application of giant magnetostrictive materials.

[0074] Example 2

[0075] This embodiment provides another giant magnetostrictive motor, and the same parts as those in the first embodiment are not described in detail here, and only the different parts are introduced below.

[0076] like Figure 3 As shown, the giant magnetostrictive motor also includes a first hinge 4, a second hinge 5 and a hinge lever 6, one end of the hinge lever 6 is hinged to the push rod 3, the other end of the hinge lever is hinged to the shell 11 through the first hinge 4, the second hinge 5 is located between the push rod 3 and the first hinge 4 and close to the first hinge 4, and the hinge lever 6 is hinged to the first giant magnetostrictive material rod 12 through the second hinge 5.

[0077] In actual design, Figure 3 the brake body 1 and the push rod 3 in Figure 3 can also be designed as mechanisms with displacement amplification. Especially when a one-way bearing is used as the first locking device 7, a relatively large displacement is required to meet the requirements of the locking clearance of the one-way bearing. Currently, for the amplification of small displacements, generally, lever amplification mechanisms with flexible hinges, bow-shaped amplification mechanisms, angle amplification mechanisms, etc. can all be used to achieve displacement amplification.

[0078] In this embodiment, the size of the first giant magnetostrictive material rod 12 is Ф10x100 mm, the amplification factor of the lever is 3.5 times, and the distance from the output position of the lever to the axis of the rotating shaft 2 is 5 cm. When the operating frequency of the brake body 1 is 50 Hz, the forward rotation speed of the rotating shaft 2 is 3.3 revolutions per minute, and the maximum output torque is 1430 Ncm.

[0079] For the giant magnetostrictive motor provided in this embodiment, the brake body 1 drives the rotating shaft 2 to continuously rotate, so that the displacement of the giant magnetostrictive material can be infinitely accumulated, and then the output of large displacement, large output force or large torque can be achieved. It not only has a large output force and output torque, but also has high control accuracy, effectively expanding the application of the giant magnetostrictive material.

[0080] Embodiment 3

[0081] This embodiment provides another giant magnetostrictive motor. The parts that are the same as those in Embodiment 1 will not be described in detail here, and only the different parts will be introduced below.

[0082] As Figure 5 and Figure 6 shown, the first giant magnetostrictive material rod 12 is also hinged to the push rod 3 through a flexible rod 10, and the angle between the flexible rod 10 and the push rod 3 is 90 degrees. The linear displacement generated by the brake body 1 pushes the push rod 3 through the flexible rod 10 to generate a small rotation around the central axis of the rotating shaft 2, and drives the rotating shaft 2 to generate a small rotation; when the push rod 3 releases the rotating shaft 2, the rotation of the push rod 3 cannot drive the rotating shaft 2 to rotate to generate output torque.

[0083] As Figure 4 , Figure 5 and Figure 6 shown, the giant magnetostrictive motor further includes a locking arm 8 and a motor housing 9. The rotating shaft 2 is arranged in the motor housing 9 and extends out of the motor housing 9. One end of the locking arm 8 is fixed to the motor housing 9, and the other end locks or releases the rotating shaft 2 through the first locking device 7.

[0084] It should be noted that there are also many ways for the first locking device 7 to lock or release the rotating shaft 2. Only three of them are introduced as follows.

[0085] The first way is that the locking arm 8 locks or releases the rotating shaft 2 through a one-way bearing.

[0086] The second method is as follows Figure 8 As shown, the first locking device 7 includes a first semi-circular conductor 711, a second semi-circular conductor 712, and a b coil 713. Both the first semi-circular conductor 711 and the second semi-circular conductor 712 are fixed to the locking arm 8. The first semi-circular conductor 711 and the second semi-circular conductor 712 are oppositely arranged outside the rotating shaft 2, and a gap is formed between the first semi-circular conductor 711 and the second semi-circular conductor 712. The b coil 713 is sleeved outside both the first semi-circular conductor 711 and the second semi-circular conductor 712.

[0087] When an electric current passes through the b coil 713, the first semi-circular conductor 711 and the second semi-circular conductor 712 attract each other and lock the rotating shaft 2. When no electric current passes through the b coil 713, the first semi-circular conductor 711 and the second semi-circular conductor 712 release the rotating shaft 2.

[0088] It should be noted that in the initial state, no electric current passes through the b coil 713, the rotating shaft 2 can rotate freely around the central axis, and the locking arm 8 can also rotate freely around the central axis. When an electric current passes through the b coil 713, the first semi-circular conductor 711 on the left and the second semi-circular conductor 712 on the right attract each other through the gap therebetween, resulting in the rotation shaft 2 being locked. At this time, when the locking arm 8 is pushed to rotate around the central axis, it will drive the rotating shaft 2 to rotate. However, since the locking arm 8 is fixed to the motor housing 9, the rotating shaft 2, the locking arm 8, the first locking device 7, and the motor housing 9 are all locked, and the rotating shaft 2 cannot rotate.

[0089] The third method is as follows Figure 7 As shown, the first locking device 7 includes a second giant magnetostrictive material rod 721, a c coil 722, a second pressure screw 723, an a bearing 724, a second disc spring 725, and an output rod 726. The inner ring of the a bearing 724 is fixed to the rotating shaft 2, and the outer ring of the a bearing 724 is fixed to the locking arm 8. The second giant magnetostrictive material rod 721 is arranged inside one end of the locking arm 8 close to the rotating shaft 2, and the c coil 722 is sleeved outside the second giant magnetostrictive material rod 721. One end of the second giant magnetostrictive material rod 721 is installed with the second pressure screw 723, the other end of the second giant magnetostrictive material rod 721 is fixed to the output rod 726, and the second disc spring 725 is sleeved on one end of the output rod 726 close to the second giant magnetostrictive material rod 721. The second pressure screw 723 applies pressure to the second giant magnetostrictive material rod 721, and the second disc spring 725 is in a compressed state. Since there is a gap between the output shaft and the rotating shaft 2, the locking arm 8 releases the rotating shaft 2. When an electric current passes through the c coil 722, the second giant magnetostrictive material rod 721 elongates, causing the output rod 726 to press against the rotating shaft 2, and the locking arm 8 locks the rotating shaft 2.

[0090] It should be noted that an appropriate prestress is applied to the second giant magnetostrictive material rod 721 through the second compression screw 723, and the second disc spring 725 is compressed. However, at this time, the output rod 726 does not contact the rotating shaft 2, that is, the rotating shaft 2 is in a loose state. When an electric current passes through the c coil 722, the second giant magnetostrictive material rod 721 elongates, pushing the output rod 726 to press against the rotating shaft 2, that is, the locking arm 8 and the rotating shaft 2 are in a locked state. If the locking arm 8 is pushed around the central axis of the rotating shaft 2, the rotating shaft 2 will rotate accordingly; however, since the locking arm 8 is fixedly connected to the motor housing 9, the motor housing 9, the locking arm 8, the first locking device 7, and the rotating shaft 2 will all be locked, and at this time, the rotating shaft 2 cannot rotate.

[0091] The working principle of the giant magnetostrictive motor provided in this embodiment is as follows:

[0092] Step 1: The locking arm 8 releases the rotating shaft 2, and the push rod 3 is in the initial angular position; the push rod 3 locks the rotating shaft 2, and the brake body 1 generates a displacement or force to push the push rod 3 to drive the rotating shaft 2 to rotate forward by a small angle and drive the external load to do work.

[0093] Step 2: The locking arm 8 locks the rotating shaft 2, and at this time, the rotating shaft 2 cannot rotate; then, the push rod 3 releases the rotating shaft 2, and the giant magnetostrictive actuator generates a reverse displacement or force to pull the first locking device 7 and the push rod 3 back to the initial angular position. At this time, since the rotating shaft 2 is locked by the locking arm 8, the rotating shaft 2 does not reset following the rotation of the push rod 3.

[0094] Step 3: Continuously repeat the above Step 1 and Step 2, and the rotating shaft 2 will continuously rotate around the central axis of the rotating shaft 2, and can drive the external load to rotate through the rotating shaft 2 and do work externally.

[0095] It should be noted that as Figure 5 and Figure 6 shown, after one cycle of Steps 1 and 2, Figure 5 the initial position of the central axis of the push rod 3 rotates to Figure 6 the position. Assuming that the distance between the flexible rod 10 and the central axis of the rotating shaft 2 is R, the displacement generated by the brake body 1 each time is ΔL, and the output force generated is F. If the working frequency of the brake body 1 is f, the rotational speed of the motor is 60f*ΔL / (2πR) (revolutions per minute), and the output torque is FR.

[0096] In this embodiment, according to Figure 5Implementation, wherein the dimensions of the terbium-dysprosium-iron giant magnetostrictive material used in the first giant magnetostrictive material rod 12 in the brake body 1 and the second giant magnetostrictive material rod 721 in the first locking device 7 are both a diameter of 20 mm and a length of 100 mm. The first disc spring 14 and the second disc spring 725 are both applied with a prestress of about 10 MPa. The distance between the flexible rod 10 and the central axis of the rotating shaft 2 is 10 cm. When the brake body 1 operates at a frequency of 50 Hz, the rotational speed of the rotating shaft 2 reaches 0.04 revolutions per minute, and the maximum output torque is 40000 Ncm.

[0097] For the giant magnetostrictive motor provided in this embodiment, the brake body 1 drives the rotating shaft 2 to continuously rotate, so as to realize that the displacement of the giant magnetostrictive material can be infinitely accumulated, and further realize the output of large displacement, large output force or large torque. It not only has a large output force and output torque, but also has high control accuracy, effectively expanding the application of the giant magnetostrictive material.

[0098] Although the present invention has been described in detail above with general descriptions and specific embodiments, on the basis of the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A giant magnetostrictive motor, characterized in that, The giant magnetostrictive motor includes a brake body, a rotating shaft, and a push rod; The brake body includes a housing, a first giant magnetostrictive material rod, and an a coil. The first giant magnetostrictive material rod and the a coil are both disposed inside the housing, and the first giant magnetostrictive material rod passes through the a coil. Under the action of an alternating magnetic field, the first giant magnetostrictive material rod repeatedly elongates and shortens; One end of the push rod is hinged to the first giant magnetostrictive material rod, and the other end is connected to the rotating shaft; The push rod locks the rotating shaft. The first giant magnetostrictive material rod elongates and pushes the push rod to move, and the push rod drives the rotating shaft to rotate; The push rod releases the rotating shaft. The first giant magnetostrictive material rod shortens and drives the push rod to reset, and the rotating shaft stops; In this way, the brake body drives the rotating shaft to continuously rotate; The giant magnetostrictive motor further includes a first hinge, a second hinge, a hinge lever, and a first locking device. One end of the hinge lever is hinged to the push rod, and the other end of the hinge lever is hinged to the housing through the first hinge. The second hinge is located between the push rod and the first hinge and is close to the first hinge. The hinge lever is hinged to the first giant magnetostrictive material rod through the second hinge; the push rod locks or releases the rotating shaft through the first locking device; The brake body further includes a first disc spring and a first pressing screw; the first pressing screw is installed at one end of the first giant magnetostrictive material rod away from the hinge lever, and the first disc spring is installed at one end of the first giant magnetostrictive material rod close to the hinge lever. The first pressing screw presses the first giant magnetostrictive material rod and makes the first disc spring in a compressed state.

2. The giant magnetostrictive motor according to claim 1, characterized in that, The first locking device is a one-way bearing. The rotating shaft is fixed to the inner ring of the one-way bearing, and the push rod is fixed to the outer ring of the one-way bearing; When the push rod moves, the push rod locks the rotating shaft to rotate through the one-way bearing; When the push rod moves in the reverse direction, the push rod drives the one-way bearing to rotate, and the one-way bearing releases the rotating shaft.

3. The giant magnetostrictive motor according to claim 1, wherein The first locking device includes a first semi-conductor, a second semi-conductor, and a b coil, and both the first semi-conductor and the second semi-conductor are fixed to the push rod; The first semi-conductor and the second semi-conductor are relatively arranged outside the rotating shaft, and a gap is formed between the first semi-conductor and the second semi-conductor; b coils are sleeved outside both the first semi-conductor and the second semi-conductor; When current passes through the b coil, the first semi-conductor and the second semi-conductor attract each other and lock the rotating shaft; when no current passes through the b coil, the first semi-conductor and the second semi-conductor release the rotating shaft.

4. The giant magnetostrictive motor according to claim 1, characterized in that, The first locking device includes a second giant magnetostrictive material rod, a c coil, a second pressing screw, an a bearing, a second disc spring, and an output rod; The inner ring of the a bearing is fixed to the rotating shaft, and the outer ring of the a bearing is fixed to the push rod; Inside one end of the push rod close to the rotating shaft, a second giant magnetostrictive material rod is arranged, and a c coil is sleeved outside the second giant magnetostrictive material rod; One end of the second giant magnetostrictive material rod is installed with the second pressure screw, the other end of the second giant magnetostrictive material rod fixes the output rod, and a second disc spring is sleeved at one end of the output rod close to the second giant magnetostrictive material rod; the second pressure screw presses on the second giant magnetostrictive material rod, and the second disc spring is in a compressed state; A gap is arranged between the output rod and the rotating shaft, and the push rod releases the rotating shaft; When an electric current passes through the c coil, the second giant magnetostrictive material rod elongates to make the output rod press against the rotating shaft, and the push rod locks the rotating shaft.

5. The giant magnetostrictive motor according to claim 2, 3 or 4, characterized in that, The giant magnetostrictive motor further includes a locking arm and a motor housing, the rotating shaft is arranged inside the motor housing and extends out of the motor housing, one end of the locking arm is fixed to the motor housing, and the other end locks or releases the rotating shaft through a one-way bearing.

6. The giant magnetostrictive motor according to claim 2, 3 or 4, characterized in that The giant magnetostrictive motor further includes a locking arm and a motor housing, the rotating shaft is arranged inside the motor housing and extends out of the motor housing, one end of the locking arm is fixed to the motor housing, and the other end locks or releases the rotating shaft through a first locking device; The first locking device includes a first semi-conductor, a second semi-conductor and a b coil, and both the first semi-conductor and the second semi-conductor are fixed to the locking arm; The first semi-conductor and the second semi-conductor are oppositely arranged outside the rotating shaft, and a gap is formed between the first semi-conductor and the second semi-conductor; b coils are sleeved outside both the first semi-conductor and the second semi-conductor; When an electric current passes through the b coil, the first semi-conductor and the second semi-conductor attract each other and lock the rotating shaft; when no electric current passes through the b coil, the first semi-conductor and the second semi-conductor release the rotating shaft.

7. The giant magnetostrictive motor according to claim 2, 3 or 4, characterized in that The giant magnetostrictive motor further includes a locking arm and a motor housing, the rotating shaft is arranged inside the motor housing and extends out of the motor housing, one end of the locking arm is fixed to the motor housing, and the other end locks or releases the rotating shaft through a first locking device; The first locking device includes a second giant magnetostrictive material rod, a c coil, a second pressure screw, an a bearing, a second disc spring and an output rod; The inner ring of the a bearing is fixed to the rotating shaft, and the outer ring of the a bearing fixes the locking arm; Inside one end of the locking arm close to the rotating shaft, a second giant magnetostrictive material rod is arranged, and a c coil is sleeved outside the second giant magnetostrictive material rod; One end of the second giant magnetostrictive material rod is installed with the second pressure screw, the other end of the second giant magnetostrictive material rod fixes the output rod, and a second disc spring is sleeved at one end of the output rod close to the second giant magnetostrictive material rod; the second pressure screw presses on the second giant magnetostrictive material rod, and the second disc spring is in a compressed state; A gap is arranged between the output rod and the rotating shaft, and the locking arm releases the rotating shaft; When an electric current is applied to the c coil, the second giant magnetostrictive material rod elongates, causing the output rod to press against the rotating shaft, and the locking arm locks the rotating shaft.

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