Motor locking device and gimbal

Abstract

The utility model discloses a motor locking device, including motor, motor includes rotor and stator, and rotor rotates relative to stator, still include first locking piece and second locking piece to memory metal wire, first locking piece sets up on the component of being connected with stator, second locking piece sets up on the component of being connected with rotor, memory metal wire and first locking piece are connected, and memory metal wire is used for driving first locking piece to move to first direction and second direction, and memory metal wire realizes to first direction movement or second direction movement through energization or power failure, thereby to unlock motor or lock motor. Realize the locking or unlocking of automatic control motor through the energization or power failure of memory metal wire, solved the problem that need manual control motor stator and rotor locking.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor locking device and a gimbal. Background Technology

[0002] Existing gimbals include a motor, a motor locking device, a motor rotor, and a motor stator. The motor rotor has a first limiting member, and the motor stator has a second limiting member. When the motor needs to be locked, the motor rotor or motor stator needs to be manually rotated to engage the first and second limiting members. When the motor needs to be unlocked, the motor rotor or motor stator needs to be manually rotated to disengage the first and second limiting members. The drawback of this motor locking structure is that locking by manually rotating the motor rotor or stator is inconvenient during use and affects user experience.

[0003] Therefore, a motor locking device and a gimbal are needed to solve the above problems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A motor locking device includes a motor, the motor including a rotor and a stator, the rotor rotating relative to the stator; it also includes a first locking member and a second locking member, and a memory metal wire, the first locking member and the memory metal wire being disposed on a component connected to the stator, the second locking member being disposed on a component connected to the rotor, the memory metal wire being connected to the first locking member, the first locking member being made of an elastic material and capable of moving with the energization or de-energization of the memory metal wire; The memory metal wire is used to drive the first locking member to move in the first direction and the second direction. When the memory metal wire drives the first locking member to move in the first direction, the first locking member and the second locking member move away from each other, reducing the locking force between the first locking member and the second locking member or unlocking the motor. When the memory metal wire drives the first locking member to move in the second direction, the first locking member and the second locking member are mutually limited, increasing the locking force between the first locking member and the second locking member or locking the motor. The memory metal wire moves in the first direction or the second direction by being energized or de-energized.

[0005] In some embodiments, the first locking member and the second locking member are in a concave-convex fit, wherein the first locking member has a protrusion and the second locking member has a recess, or the first locking member has a recess and the second locking member has a protrusion.

[0006] In some embodiments, the two ends of the memory metal wire are electrically connected to a power source to control the power supply and de-energization of the memory metal wire; or, the first locking member is a conductive material that conducts electricity to the memory metal wire after being connected to it.

[0007] In some embodiments, the second locking member is disposed on the rotor shaft, and the first locking member and the second locking member limit the movement inside the motor.

[0008] In some embodiments, the second locking member has a collar, the protrusion being disposed on the outside of the collar, the collar being sleeved on the outer periphery of the rotating shaft, and the protrusion being used to mate with the first locking member.

[0009] In some embodiments, the second locking member is disposed on the outer side wall of the rotor and forms a limiting portion with the outer side wall of the rotor. The limiting portion has the recess, and the protrusion of the first locking member matches and limits the recess; or, the limiting portion has the protrusion, and the recess of the first locking member matches and limits the protrusion, so that the first locking member and the second locking member are limited on the outer side wall of the motor.

[0010] In some embodiments, the stator further includes a sliding portion, on which the shape memory metal wire is disposed and is slidable.

[0011] In some embodiments, the sliding part is a bearing or a sliding pin.

[0012] A gimbal includes a motor locking device according to any of the above embodiments.

[0013] Due to the adoption of the above technical solution, the technological advancements achieved by this utility model compared to the prior art are as follows: 1. By energizing the memory metal wire, the first locking member is moved in a first direction to reduce the locking force between the first locking member and the second locking member or to unlock the second locking member; by de-energizing the memory metal wire, the locking force between the first locking member and the second locking member is increased or the motor is locked, thereby achieving automatic control of motor locking and unlocking. This avoids locking or unlocking the motor by manually rotating the stator or rotor, improving the user experience.

[0014] 2. By making the first locking member an elastic material, it can move in the second direction to the second locking member and lock with the second locking member after the memory metal wire is energized, without the need for a reset member. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1-3 A schematic diagram of one embodiment of this utility model; Figure 4-6 A schematic diagram of one embodiment of this utility model. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0018] Please see Figure 1-6 The motor locking device shown includes a motor 5, which includes a rotor and a stator 7, with the rotor rotating relative to the stator 7; it also includes a first locking member 1 and a second locking member 4, as well as a memory metal wire 2. The first locking member 1 and the memory metal wire 2 are disposed on a component connected to the stator, the second locking member 1 is disposed on a component connected to the rotor, the memory metal wire 2 is connected to the first locking member 1, and the first locking member 1 is made of an elastic material and can move with the energization or de-energization of the memory metal wire 2; The memory metal wire 2 is connected to the first locking member 1. The memory metal wire 2 is used to drive the first locking member 1 to move in the first direction and the second direction. When the memory metal wire 2 drives the first locking member 1 to move in the first direction, the first locking member 1 and the second locking member 4 move away from each other, reducing the locking force between the first locking member and the second locking member or unlocking the motor. When the memory metal wire 2 drives the first locking member 1 to move in the second direction, the first locking member 1 and the second locking member 4 limit each other, increasing the locking force between the first locking member and the second locking member or locking the motor 5. The shape memory metal wire 2 moves in the first direction or the second direction by turning on or off the power.

[0019] When motor 5 is locked, stator 7 and rotor cannot rotate relative to each other; when motor 5 is unlocked, stator 7 and rotor can rotate freely.

[0020] The elastic material of the first locking member 1 is an elastic material in the prior art, such as steel, plastic parts, etc.

[0021] When the memory metal wire 2 is energized, its length shortens, thereby causing the first locking member 1 to move in the first direction away from the second locking member 4, reducing the locking force between the first locking member and the second locking member or completely unlocking the motor 5; when the power is off, the memory metal wire 2 extends on the basis of its shortened length, thereby causing the first locking member 1 to move in the second direction. When the power is off, the second locking member 4 is fixed in a preset position, and the first locking member 1 moves in the second direction and mutually limits the second locking member 4, increasing the locking force between the first locking member and the second locking member or locking the motor 5.

[0022] In some embodiments, the first locking member 1 and the second locking member 4 are in a concave-convex fit, wherein the first locking member 1 has a protrusion and the second locking member 4 has a recess, or the first locking member 1 has a recess and the second locking member 4 has a protrusion. This concave-convex fit allows the first locking member 1 and the second locking member 4 to mutually limit each other's movement.

[0023] The edge of the concave or convex part of the first locking member 1 is a bevel. By setting the bevel structure, when the second locking member 4 matches the first locking member 1, the longer the contact length with the bevel, the greater the locking force and the tighter the lock. The shorter the contact length with the bevel, the smaller the locking force. If there is no contact with the bevel, there is no locking force. When the locking force is smaller or there is no locking force, the force of the rotating shaft of the motor 5 is greater than the locking force or there is no need to overcome the locking force, thereby unlocking the motor. Conversely, if the force of the rotating shaft of the motor 5 is less than the locking force, the motor is locked.

[0024] In some embodiments, the two ends of the memory metal wire 2 are electrically connected to a power source, thereby enabling the memory metal wire 2 to be energized and de-energized. Alternatively, the first locking member is made of a conductive material, which, after being connected to the memory metal wire, conducts electricity to the memory metal wire.

[0025] Specifically, the first locking element is made of conductive material and can be connected to the power source at one end. The memory metal wire 2 is disposed on the component connected to the stator and connected to the power source at one end. The first locking element 1 has the function of conducting electricity to the memory metal wire 2.

[0026] One end of the first locking member 1 is fixed to the stator 7 of the motor 5, and the other end is connected to the memory metal wire 2. The end of the first locking member 1 connected to the memory metal wire 2 moves in the first direction or the second direction along with the memory metal wire 2. One end of the memory metal wire 2 is fixedly connected to the stator 7, and the other end is connected to the first locking member 1. The second locking member 4 is disposed on the rotor.

[0027] In some implementations, such as Figure 4-6 As shown, the second locking member 4 is disposed on the rotor shaft 6, and the first locking member and the second locking member are limited inside the motor. The second locking member 4 has a collar 41, and a locking part 42 is provided on the outer side of the collar 41. The collar 41 is sleeved on the outer circumference of the rotor shaft 4, and the locking part 42 is used to match the first locking member 1.

[0028] In some implementations, such as Figure 1-3 As shown, the second locking member 4 is disposed on the outer side wall of the rotor and forms a limiting part 43 with the outer side wall of the rotor. The limiting part 43 has a recess 431, and the protrusion 11 of the first locking member 1 matches and limits the recess 431; or, the limiting part 43 has a protrusion, and the recess of the first locking member 1 matches and limits the protrusion, so that the first locking member 1 and the second locking member 4 are limited on the outer side wall of the motor.

[0029] In some embodiments, the stator 7 further includes a sliding portion 3, on which a memory metal wire is disposed and is able to slide.

[0030] In some embodiments, a sliding part 3 is included, and a memory metal wire 2 is disposed on the sliding part 3. When the power is on or off, the memory metal wire 2 can slide on the sliding part 3.

[0031] By setting the sliding part 3, such as Figure 3 As shown in Figures 5 and 6, the direction of the traction force of the memory metal wire is changed by the sliding part 3, thereby increasing the traction length and the amount of extension and retraction, so that the first locking member 1 has a larger range of motion.

[0032] In some embodiments, the first locking member 1 is elastic and can move elastically with the energization or de-energization of the memory metal wire 2. Because the first locking member 1 is elastic, when the memory metal wire 2 moves in the first direction, the first locking member 1 moves in the first direction with the memory metal wire 2 under the action of the elastic force. Since the first locking member 1 has elastic force, no additional reset member is needed to reset the first locking member 1 during the movement.

[0033] In some embodiments, the sliding part 3 is a bearing or a sliding pin. One end of the shape memory metal wire 2 is fixedly connected to the stator 7, and the other end is connected to the first locking member 1. The sliding part 3 is disposed between the two ends of the shape memory metal wire 2, allowing the shape memory metal wire 2 to slide on the sliding part 3. By providing a bearing or sliding pin, the sliding resistance is reduced when the shape memory metal wire 2 slides in the first or second direction.

[0034] A gimbal includes a motor locking device according to any of the above embodiments. The gimbal includes one motor connected to a camera device for stabilizing the camera during shooting. The gimbal may also include two motors connected by a connecting arm, both connected to the camera device for stabilizing the camera during shooting. The gimbal may also include three motors: a first motor connected to a second motor via a first connecting arm, a second motor connected to a third motor via a second connecting arm, and a third motor connected to the camera device for stabilizing the camera during shooting.

[0035] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A motor locking device, comprising a motor, the motor including a rotor and a stator, the rotor rotating relative to the stator; characterized in that: It also includes a first locking member and a second locking member, as well as a memory metal wire. The first locking member and the memory metal wire are disposed on the component connected to the stator, and the second locking member is disposed on the component connected to the rotor. The memory metal wire is connected to the first locking member. The first locking member is made of an elastic material and can move with the energization or de-energization of the memory metal wire. The memory metal wire is used to drive the first locking member to move in the first direction and the second direction. When the memory metal wire drives the first locking member to move in the first direction, the first locking member and the second locking member move away from each other, reducing the locking force between the first locking member and the second locking member or unlocking the motor. When the memory metal wire drives the first locking member to move in the second direction, the first locking member and the second locking member are mutually limited, increasing the locking force between the first locking member and the second locking member or locking the motor; The memory metal wire moves in the first direction or the second direction by being energized or de-energized.

2. The motor locking device according to claim 1, characterized in that: The first locking member and the second locking member are in a concave-convex fit, wherein the first locking member has a convex portion and the second locking member has a concave portion, or the first locking member has a concave portion and the second locking member has a convex portion.

3. The motor locking device according to claim 2, characterized in that: The two ends of the memory metal wire are respectively electrically connected to a power source to control the power supply and de-energization of the memory metal wire; or, the first locking member is a conductive material, which conducts electricity to the memory metal wire after being connected to it.

4. The motor locking device according to claim 3, characterized in that: The second locking member is disposed on the rotor shaft, and the first locking member and the second locking member limit the movement inside the motor.

5. The motor locking device according to claim 4, characterized in that: The second locking member has a collar, and the protrusion is disposed on the outside of the collar. The collar is sleeved on the outer periphery of the rotating shaft, and the protrusion is used to match the first locking member.

6. The motor locking device according to claim 3, characterized in that: The second locking member is disposed on the outer side wall of the rotor and forms a limiting part with the outer side wall of the rotor. The limiting part has the recess, and the protrusion of the first locking member matches and limits the recess; or, the limiting part has the protrusion, and the recess of the first locking member matches and limits the protrusion, so that the first locking member and the second locking member are limited on the outer side wall of the motor.

7. The motor locking device according to claim 4, characterized in that: The stator also includes a sliding part, on which the shape memory metal wire is disposed and can slide.

8. The motor locking device according to claim 7, characterized in that: The sliding part is a bearing or a sliding pin.

9. A gimbal, characterized in that: Includes the motor locking device according to any one of claims 1-8.

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