Motor and pan-tilt camera

Abstract

The invention discloses a motor and a pan-tilt camera, and relates to the technical field of electronic products. The motor comprises a rotor, a stator, a memory alloy strip and a locking assembly. The stator comprises a supporting plate. The memory alloy strip and the locking assembly are arranged on the supporting plate, the memory alloy strip is connected with the locking assembly, the locking assembly comprises a first limiting part, and the rotor comprises a second limiting part corresponding to the first limiting part; under the condition that the memory alloy strip is in a power-on state, the memory alloy strip is used for driving the first limiting part to move from the first position to the second position; under the condition that the memory alloy strip is in a power-off state, the locking assembly is used for driving the first limiting part to move from the second position to the first position; under the condition that the first limiting part is located at the first position, the first limiting part and the second limiting part are in limiting fit connection to limit rotation of the rotor relative to the stator; and under the condition that the first limiting part is located at the second position, the limiting matching connection between the first limiting part and the second limiting part is released.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, in particular to a motor and a gimbal camera. BACKGROUND

[0002] In the related art, the motor needs to have a locking function in some scenarios, that is, the rotor of the motor needs to be fixed relative to the stator in a non-working state. For example, a gimbal is a precise mechanical structure, which is usually driven by a motor to realize translation and tilting functions. When not in use, if the motor is not fixed or locked, it may rotate out of control due to external vibration or accidental touch, so that the gimbal cannot be positioned correctly, and mechanical damage may occur during storage or transportation. In the related art, when the locking force of the motor with a locking function is small, it is usually difficult to achieve the locking of the motor; when the locking force is large, it may cause the rotor to be unable to overcome the locking force during the starting process of the motor, resulting in the problem that the motor cannot rotate. In order to ensure that the motor can work normally, the motor with a locking function in the related art is usually provided with a small locking force, thereby causing the problem of poor locking effect of the motor. SUMMARY

[0003] Embodiments of the present application provide a motor and a gimbal camera, which can solve the problem of poor locking effect of the motor in the related art.

[0004] In a first aspect, a motor is provided, comprising a rotor, a stator, a memory alloy strip and a locking assembly, the rotor is connected with the stator in a matching mode, the stator comprises a support plate;

[0005] The memory alloy strip and the locking assembly are respectively arranged on a first end surface of the support plate, and the memory alloy strip is connected with the locking assembly, the locking assembly comprises a first limiting part, and the rotor comprises a second limiting part corresponding to the first limiting part;

[0006] In a case where the memory alloy strip is in a powered state, the memory alloy strip is used to drive the first limiting part to move from a first position to a second position;

[0007] In a case where the memory alloy strip is in a powered-off state, the locking assembly is used to drive the first limiting part to move from the second position to the first position;

[0008] In a case where the first limiting part is located at the first position, the first limiting part and the second limiting part are in limiting and matching connection to limit the rotation of the rotor relative to the stator; in a case where the first limiting part is located at the second position, the first limiting part and the second limiting part are out of limiting and matching connection.

[0009] In a second aspect, a gimbal camera is provided, comprising a handle, a gimbal, and the motor of the first aspect, wherein the stator of the motor is fixedly connected with the handle, and the rotor of the motor is fixedly connected with the gimbal.

[0010] In the embodiment, the motor comprises a memory alloy strip and a locking assembly, the locking assembly comprises a first limiting part, and the rotor comprises a second limiting part corresponding to the first limiting part. When the memory alloy strip is in the energized state, the memory alloy strip is used to drive the first limiting part to move from the first position to the second position; when the memory alloy strip is in the de-energized state, the locking assembly is used to drive the first limiting part to move from the second position to the first position. Thus, when the motor needs to be locked, the memory alloy strip can be controlled to be in the de-energized state, at this time, the locking assembly can drive the first limiting part to move to the first position, so that the first limiting part and the second limiting part are in limiting fit connection, thereby the rotation of the rotor relative to the stator can be limited, so that the motor has a better locking effect. When the motor needs to enter the working state, the memory alloy strip can be controlled to be in the energized state, at this time, the memory alloy strip can drive the first limiting part to move from the first position to the second position, so that the first limiting part and the second limiting part are disengaged from the limiting fit connection, that is, the locking of the second limiting part can be released. Thus, the problem that the motor cannot be normally started due to the excessive locking force of the motor can be avoided, that is, the motor can be normally started while the motor has a better locking effect. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a structural schematic diagram of the motor provided by the embodiment of the application;

[0012] Figure 2 is one of the structural schematic diagrams of the first end surface of the support plate in the motor provided by the embodiment of the application;

[0013] Figure 3 is another of the structural schematic diagrams of the first end surface of the support plate in the motor provided by the embodiment of the application;

[0014] Figure 4 is a structural exploded view of the motor provided by the embodiment of the application;

[0015] Figure 5 is a sectional view of the motor provided by the embodiment of the application;

[0016] Figure 6 is one of the structural schematic diagrams of the locking assembly in the embodiment of the application;

[0017] Figure 7 is another of the structural schematic diagrams of the locking assembly in the embodiment of the application;

[0018] Figure 8 is a structure exploded view of a gimbal camera in the embodiments of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0020] The terms "first", "second", and the like in the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second" are usually a category and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in the present application means at least one of the connected objects. For example, the protection scope of "A or B" at least covers three schemes, namely, scheme one: including A and not including B; scheme two: including B and not including A; scheme three: including A and B. In addition, the terms "A and / or B", "at least one of A and B", "at least one of A or B" also at least cover the above three schemes, respectively. The character " / " generally represents that the front and rear associated objects are in an "or" relationship.

[0021] The motor and gimbal camera provided by the embodiments of the present application will be described in detail below in combination with the drawings and some embodiments and their application scenarios.

[0022] Please refer to Figures 1 to 5 The embodiments of the present application provide a motor, comprising a rotor 100, a stator 200, a memory alloy strip 321 and a locking assembly 300, the rotor 100 is connected with the stator 200, the stator 200 comprises a support plate 210;

[0023] The memory alloy strip 321 and the locking assembly 300 are arranged on the first end surface 212 of the support plate 210, and the memory alloy strip 321 is connected with the locking assembly 300, the locking assembly 300 comprises a first limiting part 310, and the rotor 100 comprises a second limiting part 112 corresponding to the first limiting part 310;

[0024] Wherein, in the case that the memory alloy strip 321 is in the energized state, the memory alloy strip 321 is used to drive the first limiting part 310 to move from the first position to the second position;

[0025] In a case where the memory alloy strip 321 is in a power-off state, the locking assembly 300 is configured to drive the first limiting part 310 to move from the second position to the first position.

[0026] In a case where the first limiting part 310 is located at the first position, the first limiting part 310 is in limiting cooperation with the second limiting part 112 to limit rotation of the rotor 100 relative to the stator 200; in a case where the first limiting part 310 is located at the second position, the first limiting part 310 is out of limiting cooperation with the second limiting part 112.

[0027] The thickness and specific shape of the memory alloy strip 321 can be set as needed, for example, the memory alloy strip 321 can be in a wire shape, i.e., the memory alloy strip 321 can be a memory alloy wire. For another example, the memory alloy strip 321 is in a strip shape, i.e., the memory alloy strip 321 can be a memory alloy strip.

[0028] The above motor can be applied to various scenes requiring the motor to have a stop locking function. For example, it can be applied to a gimbal camera, or when a mobile phone, a tablet, a watch or the like has a motor with a stop locking function, the motor in the embodiment of the application can also be applied to various types of devices such as mobile phones, tablets and watches.

[0029] The first limiting part 310 and the second limiting part 112 can be various types of limiting structures, for example, in some embodiments of the application, one of the first limiting part 310 and the second limiting part 112 is a limiting groove, and the other is a limiting protrusion.

[0030] The above locking assembly 300 can be various locking assemblies 300 capable of controlling the first limiting part 310 to move in one direction, for example, the locking assembly 300 can include an elastic member or an elastic part, and the direction of the elastic force in the locking assembly 300 can be directed from the second position to the first position, so that the first limiting part 310 has a movement trend from the second position to the first position. In this way, when the memory alloy strip 321 is in a power-off state, the memory alloy strip 321 will release the force on the locking assembly 300, so that under the action of the elastic force in the locking assembly 300, the first limiting part 310 can be moved from the second position to the first position.

[0031] Correspondingly, the length of the memory alloy strip 321 in the energized state is shorter than that in the de-energized state. In this way, when the memory alloy strip 321 is in the energized state, a pulling force acting on the locking assembly 300 can be generated. Thus, only the relative position between the memory alloy strip 321 and the locking assembly 300 needs to be adjusted, so that the direction of the pulling force acting on the locking assembly 300 is changed from the first position to the second position, that is, the first limiting part 310 is driven to move from the first position to the second position when the memory alloy strip 321 is in the energized state. For example, one end of the memory alloy strip 321 can be connected to the first limiting part 310, and the other end can be located on the side of the first limiting part 310 opposite to the second limiting part 112, and the memory alloy strip 321 can be in a straightened state.

[0032] It should be noted that when the memory alloy strip 321 is in the energized state, only the area where the first limiting part 310 of the locking assembly 300 is located can be moved from the first position to the second position, and the other areas of the locking assembly 300 can remain unchanged relative to the position of the first end surface 212.

[0033] The second limiting part 112 can be located at any position in the part of the rotor 100 that rotates relative to the stator 200 during rotation. For example, referring to Figure 1 In some embodiments of the present application, the second limiting part 112 is located on the outer side wall of the rotating shaft 110 of the rotor 100. For another example, when the rotating shaft 110 is fixedly connected to other components, the second limiting part 112 can also be located on the other components connected to the rotating shaft 110, which can be set as needed. For example, in some embodiments of the present application, the rotating shaft 110 can be fixedly connected to a rotating plate, and the rotating shaft 110 can drive the rotating plate to rotate synchronously during rotation. At this time, the second limiting part 112 can be arranged on the outer side wall of the rotating plate. In order to facilitate understanding, the embodiments of the present application take the second limiting part 112 located on the outer side wall of the rotating shaft 110 of the rotor 100 as an example to further explain the structure of the motor.

[0034] It can be understood that in the above-mentioned rotor 100 and stator 200, one has a coil 120 and the other has a magnet 240, which cooperate with each other to drive the rotor 100 to rotate relative to the stator 200. For example, referring to Figure 5 In some embodiments of the present application, the rotor 100 is provided with a coil 120, and the stator 200 is provided with a magnet 240.

[0035] The support plate 210 can be a plate body inside the stator 200, and the support plate 210 can be perpendicular to the shaft 110 of the rotor 100. Please refer to Figure 4 and Figure 5 In some embodiments of the present application, the base of the stator 200 is composed of the support plate 210 and the gland 220, the first end surface 212 of the support plate 210 is an end surface of the support plate 210 facing the gland 220, and the first end surface 212 of the support plate 210 and the gland 220 form an installation cavity therebetween, the locking assembly 300 and the memory alloy strip 321 are respectively arranged in the installation cavity, and the protruding section 111 of the shaft 110 is located in the installation cavity.

[0036] It can be understood that the motor can further include a control circuit board, and the coil 120 and the memory alloy strip 321 can be respectively electrically connected with the control circuit board. Thus, during the starting process of the motor, the control circuit board can first control the memory alloy strip 321 to drive the first limiting part 310 to move to the second position, so as to release the locking state of the motor, and then the control circuit board supplies power to the coil 120, so that the rotor 100 can be driven to rotate relative to the stator 200 under the electromagnetic driving force between the coil 120 and the magnet 240. Correspondingly, during the shutdown process of the motor, the control circuit board can first control the coil 120 to be powered off and control the memory alloy strip 321 to be powered off, so that the first limiting part 310 can be moved from the second position to the first position under the elastic force in the locking assembly 300, and when the second limiting part 112 of the rotor 100 rotates to be opposite to the first limiting part 310, the first limiting part 310 can be limited and matched with the second limiting part 112, so as to realize the locking of the motor.

[0037] In the embodiment, the motor comprises the memory alloy strip 321 and the locking assembly 300, the locking assembly 300 comprises the first limiting part 310, and the rotor 100 comprises the second limiting part 112 corresponding to the first limiting part 310. When the memory alloy strip 321 is in the energized state, the memory alloy strip 321 is used to drive the first limiting part 310 to move from the first position to the second position; when the memory alloy strip 321 is in the de-energized state, the locking assembly 300 is used to drive the first limiting part 310 to move from the second position to the first position. Thus, when the motor needs to be locked, the memory alloy strip 321 can be controlled to be in the de-energized state, at this time, the locking assembly 300 can drive the first limiting part 310 to move to the first position, so that the first limiting part 310 is in limiting fit connection with the second limiting part 112, thereby the rotation of the rotor 100 relative to the stator 200 can be limited, so that the motor has a better locking effect. When the motor needs to be in the working state, the memory alloy strip 321 can be controlled to be in the energized state, at this time, the memory alloy strip 321 can drive the first limiting part 310 to move from the first position to the second position, so that the first limiting part 310 is disengaged from the limiting fit connection with the second limiting part 112, that is, the locking of the second limiting part 112 can be disengaged. Thus, the problem that the motor cannot be normally started due to the excessive locking force of the motor can be avoided, that is, the motor can be normally started while the motor has a better locking effect.

[0038] Optionally, the locking assembly 300 comprises the elastic limiting part 330, two ends of the elastic limiting part 330 are fixedly connected with the first end face 212 respectively, and the elastic limiting part 330 comprises the elastic protrusion 331 protruding towards the side of the second limiting part 112 between the two ends of the elastic limiting part 330. The surface of the elastic protrusion 331 on the side facing the second limiting part 112 is provided with the first limiting part 310, and the side of the elastic protrusion 331 facing away from the second limiting part 112 is provided with the connecting part 322, and the memory alloy strip 321 is connected with the connecting part 322.

[0039] When the memory alloy strip 321 is in the energized state, the memory alloy strip 321 drives the elastic protrusion 331 to elastically deform away from the second limiting part 112, so that the first limiting part 310 moves from the first position to the second position.

[0040] When the memory alloy strip 321 is in the de-energized state, the elastic protrusion 331 drives the first limiting part 310 to move from the second position to the first position under the action of the elastic force of the elastic protrusion 331.

[0041] The connecting portion 322 can be integrally formed with the elastic protrusion 331, and in this case, the connecting portion 322 can be an extension body extending from the elastic protrusion 331 towards the side opposite to the rotation shaft 110. The shape of the extension body can be set as required. For example, in some embodiments of the present application, the extension body can include an ear plate provided with a through hole, and the memory alloy strip 321 is arranged in the through hole of the ear plate. In this way, the elastic protrusion 331 can be pulled towards the side away from the rotation shaft 110 by the ear plate during the contraction of the memory alloy strip 321.

[0042] In addition, the connecting portion 322 can also be a connecting piece connected with the elastic protrusion 331. For example, please refer to Figure 2 In some embodiments of the present application, the connecting portion 322 includes a sliding block, the sliding block is in sliding connection with the support plate 210, and the sliding block is fixedly connected with the arc-shaped segment 334. The memory alloy strip 321 is connected with the sliding block, and the memory alloy strip 321 is used to drive the sliding block to slide away from the rotation shaft 110. The sliding block includes an arc-shaped connecting plate 3222 and a third protruding portion 3221. The arc-shaped connecting plate 3222 is located between the third protruding portion 3221 and the arc-shaped segment 334. The bending direction of the arc-shaped connecting plate 3222 is the same as the bending direction of the arc-shaped segment 334. The arc-shaped segment 334 includes a clamping jaw 335, and the arc-shaped segment 334 is fixedly connected with the arc-shaped connecting plate 3222 through the clamping jaw 335. The arc-shaped connecting plate 3222 and the third protruding portion 3221 have a gap therebetween, the memory alloy strip is arranged in the gap, and the memory alloy strip is attached to the surface of the third protruding portion 3221 towards the arc-shaped connecting plate 3222. Please refer to Figure 6 and Figure 7 In some embodiments of the present application, the arc-shaped segment 334 includes four clamping jaws 335, and the four clamping jaws 335 respectively grab the two ends of the arc-shaped connecting plate 3222. It can be understood that, during the contraction of the memory alloy strip, the memory alloy strip can pull the third protruding portion 3221, so that the sliding block slides away from the rotation shaft 110.

[0043] The elastic limiting piece 330 can be an elastic limiting piece made of hard material, for example, the elastic limiting piece 330 can be made of metal. The elastic protrusion 331 can be a bent protrusion formed by bending a metal strip in the shape of a strip-shaped plate towards the rotation shaft 110.

[0044] Please refer to Figure 2In some embodiments of the present application, the elastic limiting member 330 is fixed at both ends and protrudes towards the side of the second limiting portion 112, and the elastic force of the elastic protrusion 331 is directed towards the side of the second limiting portion 112. In this way, when the motor is in the locked state, the elastic force of the elastic protrusion 331 can press the first limiting portion 310 against the second limiting portion 112, so that the motor can be in a stable locked state. In this embodiment, the elastic limiting member 330 protrudes towards the side of the second limiting portion 112, i.e. the elastic limiting member 330 protrudes towards the side of the rotating shaft 110. Correspondingly, the elastic force of the elastic protrusion 331 is directed towards the side of the second limiting portion 112, i.e. the elastic force of the elastic protrusion 331 is directed towards the side of the rotating shaft 110. Figure 2 In the embodiment shown, the elastic limiting member 330 protrudes towards the side of the second limiting portion 112, i.e. the elastic limiting member 330 protrudes towards the side of the rotating shaft 110. Correspondingly, the elastic force of the elastic protrusion 331 is directed towards the side of the second limiting portion 112, i.e. the elastic force of the elastic protrusion 331 is directed towards the side of the rotating shaft 110.

[0045] Correspondingly, when the motor needs to be started, the elastic force of the elastic protrusion 331 can be overcome by the memory alloy strip 321, so that the elastic protrusion 331 deforms elastically away from the side of the second limiting portion 112, thereby causing the first limiting portion 310 to gradually separate from the second limiting portion 112 to achieve unlocking of the motor. At this time, the process of rotating the rotor 100 relative to the stator 200 is not limited by the locking assembly 300, thereby facilitating normal starting of the motor. When the force of the memory alloy strip 321 on the elastic protrusion 331 is removed, the elastic protrusion 331 can deform towards the side of the second limiting portion 112 under the action of its own elastic force, thereby causing the first limiting portion 310 to move to the first position.

[0046] In this embodiment, the locking assembly 300 includes an elastic limiting member 330, both ends of the elastic limiting member 330 are fixedly connected to the first end face 212, and the elastic limiting member 330 includes an elastic protrusion 331 protruding towards the side of the second limiting portion 112 between the two ends of the elastic limiting member 330. The surface of the elastic protrusion 331 on the side of the second limiting portion 112 is provided with the first limiting portion 310, and the side of the elastic protrusion 331 opposite to the second limiting portion 112 is provided with a connecting portion 322, and the memory alloy strip 321 is connected to the connecting portion 322. When the memory alloy strip 321 is in the energized state, the memory alloy strip 321 drives the elastic protrusion 331 to elastically deform away from the side of the second limiting portion 112, so that the first limiting portion 310 moves from the first position to the second position, thereby facilitating unlocking of the motor. When the memory alloy strip 321 is in the de-energized state, the elastic protrusion 331 drives the first limiting portion 310 to move from the second position to the first position under the action of its own elastic force, thereby facilitating locking of the motor. In this way, by the cooperation of the elastic limiting member 330 and the memory alloy strip 321, the locking state and the unlocking state of the motor can be switched.

[0047] Optionally, the elastic protrusion 331 comprises a first elastic arm 332, an arc segment 334 and a second elastic arm 333 connected in sequence, the first elastic arm 332 is an arc structure bent towards one side of the second elastic arm 333, the second elastic arm 333 is an arc structure bent towards one side of the first elastic arm 332, the arc segment 334 is an arc structure bent towards one side of the second limiting portion 112, and the connecting portion 322 is connected with the arc segment 334;

[0048] When the memory alloy strip 321 is in the energized state, the memory alloy strip 321 drives the arc segment 334 to move away from one side of the second limiting portion 112, and the first elastic arm 332 and the second elastic arm 333 respectively generate compression deformation;

[0049] When the memory alloy strip 321 is in the de-energized state, the first elastic arm 332 and the second elastic arm 333 respectively restore the state before deformation towards one side of the second limiting portion 112 to drive the arc segment 334 to move towards one side of the second limiting portion 112.

[0050] Please refer to Figure 3 In the process that the memory alloy strip 321 drives the arc segment 334 to move away from one side of the second limiting portion 112, the two ends of the arc segment 334 respectively press the first elastic arm 332 and the second elastic arm 333, and the other ends of the first elastic arm 332 and the second elastic arm 333 are fixedly connected with the support plate 210, so that the first elastic arm 332 and the second elastic arm 333 are continuously compressed in the process, thereby increasing the elastic force inside the first elastic arm 332 and the second elastic arm 333. When the memory alloy strip 321 releases the acting force on the arc segment 334, that is, the memory alloy strip 321 releases the upward pulling force on the arc segment 334, the elastic force inside the first elastic arm 332 and the second elastic arm 333 is released, and the first elastic arm 332 and the second elastic arm 333 respectively restore the state before deformation towards one side of the shaft 110 to drive the arc segment 334 to move towards one side of the shaft 110.

[0051] In the embodiment, the elastic protrusion 331 comprises a first elastic arm 332, an arc-shaped section 334 and a second elastic arm 333 connected in sequence, the first elastic arm 332 is an arc-shaped structure bent towards the side of the second elastic arm 333, the second elastic arm 333 is an arc-shaped structure bent towards the side of the first elastic arm 332, the arc-shaped section 334 is an arc-shaped structure bent towards the side of the second limiting portion 112, and the connecting portion 322 is connected with the arc-shaped section 334; when the memory alloy strip 321 is in the energized state, the memory alloy strip 321 drives the arc-shaped section 334 to move away from the side of the second limiting portion 112, and the first elastic arm 332 and the second elastic arm 333 generate compression deformation respectively; when the memory alloy strip 321 is in the de-energized state, the first elastic arm 332 and the second elastic arm 333 respectively restore to the state before deformation towards the side of the second limiting portion 112 to drive the arc-shaped section 334 to move towards the side of the second limiting portion 112, thereby facilitating the locking and unlocking process of the motor.

[0052] Optionally, the support plate 210 is provided with a through hole 211, the rotating shaft 110 of the rotor 100 penetrates through the through hole 211, and the rotating shaft 110 comprises an extension segment 111 extending from the side of the first end face 212, and the side wall of the extension segment 111 is provided with the second limiting portion 112.

[0053] It can be understood that the extension segment 111 of the rotating shaft 110 is located in the mounting cavity.

[0054] In the embodiment, the support plate 210 is provided with a through hole 211, the rotating shaft 110 of the rotor 100 penetrates through the through hole 211, and the rotating shaft 110 comprises an extension segment 111 extending from the side of the first end face 212, and the side wall of the extension segment 111 is provided with the second limiting portion 112; when it is needed to realize the locking of the motor, the locking assembly 300 can drive the first limiting portion 310 to move to the first position, at this time, the first limiting portion 310 is in limiting and matched connection with the second limiting portion 112, and the first limiting portion 310 can limit the rotation of the second limiting portion 112 around the axis line of the rotating shaft 110, thereby facilitating the improvement of the locking effect of the motor.

[0055] Optionally, the first end surface 212 is provided with a first connecting position 213 and a second connecting position 214, the first connecting position 213 and the second connecting position 214 are respectively located on the side of the rotating shaft 110 opposite to the arc-shaped segment 334, one end of the memory alloy strip 321 is fixedly connected with the first connecting position 213, the other end of the memory alloy strip 321 is fixedly connected with the second connecting position 214, and the memory alloy strip 321 is arranged on the side of the elastic limiting piece 330 opposite to the rotating shaft 110, the part of the memory alloy strip 321 between the two ends of the elastic limiting piece 330 is bent towards the side of the arc-shaped segment 334, and the part of the memory alloy strip 321 between the two ends of the elastic limiting piece 330 is connected with the sliding block, and the memory alloy strip 321 is in a stretched state.

[0056] Please refer to Figure 2 In some embodiments of the present application, the two ends of the memory alloy strip 321 can each be provided with an ear plate, and the ear of the end of the memory alloy strip 321 can be fixedly connected with the support plate 210 through a screw. The memory alloy strip 321 is arranged on the side of the elastic limiting piece 330 opposite to the rotating shaft 110, that is, the elastic limiting piece 330 is located between the memory alloy strip 321 and the rotating shaft 110.

[0057] Please refer to Figure 2 Since the part of the memory alloy strip 321 between the two ends of the elastic limiting piece 330 is connected with the sliding block, and the sliding block is connected with the arc-shaped segment 334, under the pulling force of the sliding block on the memory alloy strip 321, the part of the memory alloy strip 321 between the two ends of the elastic limiting piece 330 can be bent towards the side of the arc-shaped segment 334. In this way, when the memory alloy strip 321 is in an energized state, the length of the memory alloy strip 321 is shortened, the part of the memory alloy strip 321 between the two ends of the elastic limiting piece 330 drives the sliding block to move upwards, so that the sliding block drives the arc-shaped segment 334 to deform upwards, and then the first limiting part 310 and the second limiting part 112 are separated to realize the unlocking process. Please refer to Figure 3 , Figure 3 The direction indicated by a in the above figure is the sliding direction of the sliding block, Figure 3 The directions indicated by b and c in the above figure are the pulling directions of the two positions of the memory alloy strip 321. Accordingly, when the memory alloy strip 321 is de-energized, the memory alloy strip 321 will restore to its original length, that is, the memory alloy strip 321 will be elongated relative to the length in the energized state. At this time, under the elastic force of the arc-shaped segment 334, the sliding block and the memory alloy strip 321 will move to the side of the rotating shaft 110 to lock the motor.

[0058] In this embodiment, the first end surface 212 is provided with a first connecting position 213 and a second connecting position 214, which are located on the side of the rotating shaft 110 opposite to the arc-shaped segment 334. One end of the memory alloy strip 321 is fixedly connected to the first connecting position 213, and the other end of the memory alloy strip 321 is fixedly connected to the second connecting position 214. The memory alloy strip 321 is arranged on the side of the elastic limiting piece 330 opposite to the rotating shaft 110. The part of the memory alloy strip 321 between the two ends of the elastic limiting piece 330 is bent towards the side of the arc-shaped segment 334, and the part of the memory alloy strip 321 between the two ends of the elastic limiting piece 330 is connected to the sliding block. The memory alloy strip 321 is in a stretched state. When the memory alloy strip 321 is in an energized state, the length of the memory alloy strip 321 is contracted, so that the locking and unlocking processes of the motor can be realized.

[0059] Optionally, one end of the elastic limiting piece 330 is provided with a first extension 341 extending towards the edge of the support plate 210, and a first limiting groove 343 is formed between the first extension 341 and the support plate 210. The other end of the elastic limiting piece 330 is provided with a second extension 342 extending towards the edge of the support plate 210, and a second limiting groove 344 is formed between the second extension 342 and the support plate 210. The memory alloy strip 321 is arranged in the first limiting groove 343 and the second limiting groove 344, respectively.

[0060] In this embodiment, the memory alloy strip 321 is arranged in the first limiting groove 343 and the second limiting groove 344, respectively. In this way, the first limiting groove 343 and the second limiting groove 344 can limit the position of the memory alloy strip 321, avoid the memory alloy strip 321 from being separated from the elastic limiting piece 330, and thus improve the stability of the structure of the locking assembly 300.

[0061] Optionally, the edge of the first end surface 212 is provided with a first protruding portion 215 and a second protruding portion 216. The first protruding portion 215 is located between the first connecting position 213 and the first extension 341, and the first protruding portion 215 includes a first clamping position 2151, and the opening of the first clamping position 2151 is located on the side of the first protruding portion opposite to the rotating shaft 110. The second protruding portion 216 is located between the second connecting position 214 and the second extension 342, and the second protruding portion 216 includes a second clamping position 2161, and the opening of the second clamping position 2161 is located on the side of the second protruding portion opposite to the rotating shaft 110. The memory alloy strip 321 is arranged in the first clamping position 2151 and the second clamping position 2161, respectively.

[0062] Please refer to Figure 4 , the memory alloy strip 321 is respectively arranged in the first clamping position 2151 and the second clamping position 2161, that is, the memory alloy strip 321 is located on the side of the first clamping position 2151 away from the rotating shaft 110, and the memory alloy strip 321 is located on the side of the second clamping position 2161 away from the rotating shaft 110. In this way, the first clamping position 2151 and the second clamping position 2161 can effectively expand the memory alloy strip 321 outward, avoid the angle of the memory alloy strip 321 at both ends of the elastic limiting piece 330 being too small, and thus avoid the problem that the memory alloy strip 321 is stuck at both ends of the elastic limiting piece 330 during the expansion and contraction process due to the angle of the memory alloy strip 321 at both ends of the elastic limiting piece 330 being too small.

[0063] In this embodiment, the edge of the first end surface 212 is provided with a first protruding portion 215 and a second protruding portion 216, the first protruding portion 215 is located between the first connecting position 213 and the first extending portion 341, and the first protruding portion 215 includes a first clamping position 2151, the opening of the first clamping position 2151 is located on the side of the first protruding portion away from the rotating shaft 110, the second protruding portion 216 is located between the second connecting position 214 and the second extending portion 342, and the second protruding portion 216 includes a second clamping position 2161, the opening of the second clamping position 2161 is located on the side of the second protruding portion away from the rotating shaft 110, and the memory alloy strip 321 is respectively arranged in the first clamping position 2151 and the second clamping position 2161. In this way, the first clamping position 2151 and the second clamping position 2161 can effectively expand the memory alloy strip 321 outward, thereby increasing the angle of the memory alloy strip 321 at both ends of the elastic limiting piece 330, and improving the smoothness of the memory alloy strip 321 during the expansion and contraction process, which is conducive to improving the stability of the locking assembly 300 during the working process.

[0064] Optionally, the stator 200 further comprises a gland 220 opposite to the first end surface 212 of the support plate 210, and the gland 220 is fixedly connected with the support plate 210, and the locking assembly 300 is located between the support plate 210 and the gland 220.

[0065] A slide 217 matched with the sliding block is formed between the support plate 210 and the gland 220, the sliding block is in sliding connection with the slide 217, and the memory alloy strip 321 is used to drive the sliding block to slide in the slide 217 away from the rotating shaft 110.

[0066] The slide 217 can include a slide groove formed in the first end surface 212 of the support plate 210, or the slide 217 can include a slide groove formed in the inner wall of the cover 220, or the slide 217 can include a slide groove formed in the first end surface 212 of the support plate 210 and a slide groove formed in the inner wall of the cover 220, and the slide groove in the support plate 210 is opposite to the slide groove in the cover 220, and together enclose the slide 217.

[0067] It can be understood that the slide 217 is arranged along the radial direction of the rotating shaft 110, so that the sliding block can move towards or away from the rotating shaft 110 during sliding along the slide 217.

[0068] Please refer to Figure 4 In some embodiments of the present application, the cover 220 can be fixedly connected with the connecting column in the support rod through the screw 230.

[0069] In this embodiment, the stator 200 further includes a cover 220, the cover 220 is opposite to the first end surface 212 of the support plate 210, and the cover 220 is fixedly connected with the support plate 210, the locking assembly 300 is located between the support plate 210 and the cover 220; the support plate 210 and the cover 220 form a slide 217 matched with the sliding block, the sliding block is in sliding connection with the slide 217, the memory alloy strip 321 is used to drive the sliding block to slide in the slide 217 in a direction away from the rotating shaft 110, so that the sliding block can only slide in the direction of the slide 217, thereby facilitating accurate control of the sliding direction of the sliding block.

[0070] Optionally, the first limiting portion 310 is a tapered hole formed in the surface of the arc-shaped segment 334 on the side facing the rotating shaft 110, and the second limiting portion 112 is a tapered protrusion matched with the tapered hole;

[0071] When the first limiting portion 310 is located at the first position, the second limiting portion 112 is embedded in the first limiting portion 310;

[0072] When the first limiting portion 310 is located at the second position, the second limiting portion 112 is located outside the first limiting portion 310.

[0073] It can be understood that in some other embodiments of the present application, the structures of the first limiting part 310 and the second limiting part 112 can be interchanged, that is, the first limiting part 310 is a tapered protrusion formed on the surface of the arc-shaped segment 334 on the side facing the rotating shaft 110, and the second limiting part 112 is a tapered groove matched with the tapered hole. Alternatively, the shapes of the first limiting part 310 and the second limiting part 112 can also be other shapes, for example, can be arc-shaped or rectangular, etc.

[0074] In this embodiment, the first limiting part 310 is a tapered hole formed on the surface of the arc-shaped segment 334 on the side facing the rotating shaft 110, and the second limiting part 112 is a tapered protrusion matched with the tapered hole; when the first limiting part 310 is located at the first position, the second limiting part 112 is embedded in the first limiting part 310; when the first limiting part 310 is located at the second position, the second limiting part 112 is located outside the first limiting part 310. Since the tapered shape is more conducive to insertion or disengagement, by making the first limiting part 310 and the second limiting part 112 tapered, it is convenient to lock and unlock the motor.

[0075] Please refer to Figure 8 The present application also provides a gimbal camera, which comprises a handle 500, a gimbal 400 and the motor described in the above embodiments. The stator 200 of the motor is fixedly connected with the handle 500, and the rotor 100 of the motor is fixedly connected with the gimbal 400.

[0076] Please refer to Figure 8 In some embodiments of the present application, the gimbal 400 is fixed to the rotor 100 of the motor, the handle 500 is fixed to the stator 200 of the motor, and the coil 120 of the motor is energized to drive the gimbal 400 to move. The gimbal 400 is connected with a camera. Since the gimbal camera comprises the motor in the above embodiments, the locking force of the motor in the gimbal 400 can be increased, so that the user can effectively lock the motor of the gimbal 400 when not using the gimbal camera, and ensure that it is in a stable state to prevent damage caused by external factors. When the user uses the gimbal camera, the locking structure of the gimbal 400 motor is changed by the mechanical and electronic combination, so that the motor can easily disengage the locking of the limiting structure. In this way, whether in the transportation of the equipment or in the daily carrying, the safety of the gimbal 400 and the overall life of the equipment can be effectively improved, and finally the competitiveness of the product can be improved.

[0077] Specifically, when the holder camera is powered off, the first limiting part 310 can be located at the first position, at this time, the first limiting part 310 is in limiting cooperation with the second limiting part 112, the motor rotor 100 cannot be separated from the locking of the first limiting part 310 to the second limiting part 112 by the torque of the motor rotor 100, and it is also difficult to push the rotor 100 to separate from the locking of the first limiting part 310 to the second limiting part 112 by external force, so as to prevent the holder 400 from being damaged by random rotation. Through the above mode, the holder camera can be limited in a fixed position when not in use, and the elastic limiting part 330 is deformed to unlock the rotor 100 by the power provided by the memory alloy strip 321 when starting, and the motor rotor 100 is deformed by the torque of the motor rotor 100 to enter the locking state when the holder camera is powered off.

[0078] The holder camera provided by the embodiment of the present application can effectively lock the motor rotor 100 of the holder camera when the user does not use the holder camera, so as to prevent external factors from damaging the holder 400. When the user starts to use the holder camera, the power is provided by the length contraction characteristic of the memory alloy strip 321 after being powered on, the elastic limiting part 330 is deformed, and the motor can be separated from the limiting. When the holder camera is powered off, the rotor 100 deforms the elastic sheet by the torque provided by the motor, and the motor can easily return to the locking position. In this way, the reliability and user experience of the holder 400 are improved.

[0079] In the embodiment, since the holder camera includes the motor described in the above embodiment, the holder camera can realize the processes of the motor in the above embodiment and has the same beneficial effects. To avoid repetition, details are not described herein.

[0080] Optionally, an end of the handle 500 facing the holder 400 is provided with a first accommodating groove 510, an end of the holder 400 facing the handle 500 is provided with a second accommodating groove 410, the stator 200 is embedded in the first accommodating groove 510, and the rotor 100 is embedded in the second accommodating groove 410.

[0081] The shape and size of the first accommodating groove 510 can match the shape and size of the stator 200, so that when the stator 200 is embedded in the first accommodating groove 510, the outer wall of the stator 200 can be attached to the inner wall of the first accommodating groove 510, and the outer wall of the stator 200 can be fixedly connected to the inner wall of the first accommodating groove 510, for example, by a fastener or a buckle. The specific connection mode can be set as required.

[0082] Correspondingly, the shape and size of the second accommodating groove 410 can match the shape and size of the rotor 100, so that when the rotor 100 is embedded in the second accommodating groove 410, the outer wall of the rotor 100 can be attached to the inner wall of the second accommodating groove 410, and the outer wall of the rotor 100 can be fixedly connected with the inner wall of the second accommodating groove 410, for example, by fasteners or by buckling, which can be set as needed.

[0083] It can be understood that the slot of the first accommodating groove 510 can be opposite to the slot of the second accommodating groove 410, and the first accommodating groove 510 and the second accommodating groove 410 can jointly enclose a closed cavity, and the motor is installed in the closed cavity.

[0084] In this embodiment, by providing the first accommodating groove 510 at one end of the handle 500 facing the gimbal 400, and providing the second accommodating groove 410 at one end of the gimbal 400 facing the handle 500, embedding the stator 200 in the first accommodating groove 510, and embedding the rotor 100 in the second accommodating groove 410, the stator 200 and the rotor 100 of the motor can be hidden in the first accommodating groove 510 and the second accommodating groove 410 respectively, avoiding the exposure of the appearance of the motor, and being conducive to improving the overall aesthetics of the gimbal camera.

[0085] The embodiments of the application are described above in combination with the drawings, but the application is not limited to the above specific embodiments, which are only illustrative and not restrictive. Those skilled in the art can make many forms under the inspiration of the application without departing from the scope of the application and the protection scope of the claims.

Claims

1. An electric machine characterized in that, The application relates to a locking assembly for a motor, which comprises a rotor, a stator, a memory alloy strip and the locking assembly. The memory alloy strip and the locking assembly are arranged on a first end surface of the support plate, and the memory alloy strip is connected with the locking assembly. The memory alloy strip drives the first limiting part to move from the first position to the second position when the memory alloy strip is in an energized state. The locking assembly drives the first limiting part to move from the second position to the first position when the memory alloy strip is in a de-energized state. The first limiting part is in limiting cooperation with the second limiting part to limit the rotation of the rotor relative to the stator when the first limiting part is located at the first position.

2. The electric machine of claim 1, wherein, The locking assembly comprises an elastic limiting piece, the two ends of the elastic limiting piece are fixedly connected with the first end surface, and the elastic limiting piece comprises an elastic protrusion protruding towards the side of the second limiting part between the two ends. The memory alloy strip drives the elastic protrusion to elastically deform away from the side of the second limiting part to make the first limiting part move from the first position to the second position when the memory alloy strip is in an energized state. The elastic protrusion drives the first limiting part to move from the second position to the first position under the action of the elastic force of the elastic protrusion when the memory alloy strip is in a de-energized state.

3. The electric machine of claim 2, wherein, The elastic protrusion comprises a first elastic arm, an arc-shaped section and a second elastic arm which are sequentially connected. The memory alloy strip drives the arc-shaped section to move away from the side of the second limiting part, and the first elastic arm and the second elastic arm are compressed when the memory alloy strip is in an energized state. The first elastic arm and the second elastic arm restore to the state before deformation towards the side of the second limiting part to push the arc-shaped section to move towards the side of the second limiting part when the memory alloy strip is in a de-energized state.

4. The electric machine of claim 3, wherein, The support plate is provided with a through hole, the rotating shaft of the rotor is arranged in the through hole, and the rotating shaft comprises a protruding section protruding from the side of the first end surface, and the side wall of the protruding section is provided with the second limiting part.

5. The electric machine of claim 4, wherein, The first end surface is provided with a first connecting position and a second connecting position, the first connecting position and the second connecting position are respectively located on the side of the rotating shaft opposite to the locking assembly, one end of the memory alloy strip is fixedly connected with the first connecting position, the other end of the memory alloy strip is fixedly connected with the second connecting position, and the memory alloy strip is arranged on the side of the elastic limiting piece opposite to the rotating shaft, the part of the memory alloy strip between the two ends of the elastic limiting piece is bent towards the side of the arc-shaped segment, and the part of the memory alloy strip between the two ends of the elastic limiting piece is connected with the connecting part.

6. The electric machine of claim 5, wherein, One end of the elastic limiting piece is provided with a first extension part extending towards the edge side of the supporting plate, and a first limiting groove is formed between the first extension part and the supporting plate, and the other end of the elastic limiting piece is provided with a second extension part extending towards the edge side of the supporting plate, and a second limiting groove is formed between the second extension part and the supporting plate, and the memory alloy strip is respectively arranged in the first limiting groove and the second limiting groove.

7. The electric machine of claim 6, wherein, The edge of the first end surface is provided with a first protruding part and a second protruding part, the first protruding part is located between the first connecting position and the first extension part, and the first protruding part comprises a first clamping position, the opening of the first clamping position is located on the side of the first protruding part opposite to the rotating shaft, the second protruding part is located between the second connecting position and the second extension part, and the second protruding part comprises a second clamping position, the opening of the second clamping position is located on the side of the second protruding part opposite to the rotating shaft, and the memory alloy strip is respectively arranged in the first clamping position and the second clamping position.

8. The electric machine of claim 4, wherein, The first limiting part is a tapered hole opened on the surface of the arc-shaped segment towards the rotating shaft, and the second limiting part is a tapered protrusion matched with the tapered hole; When the first limiting part is located at the first position, the second limiting part is embedded in the first limiting part; When the first limiting part is located at the second position, the second limiting part is located outside the first limiting part.

9. A gimbal camera, comprising: The handle, the holder and the motor of any one of claims 1-8, the stator of the motor is fixedly connected with the handle, and the rotor of the motor is fixedly connected with the holder.

10. The gimbal camera of claim 9, wherein, The end of the handle towards the holder is provided with a first accommodating groove, the end of the holder towards the handle is provided with a second accommodating groove, the stator is embedded in the first accommodating groove, and the rotor is embedded in the second accommodating groove.

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