Pan-tilt motor and pan-tilt for image acquisition device

Abstract

A pan-tilt motor and a pan-tilt for an image acquisition device. The motor upper shell and the motor lower shell are oppositely arranged and form an installation cavity. The stator seat is fixedly installed on the motor lower shell, and a bearing is installed in the stepped hole of the cylindrical body of the stator seat. The iron core winding is sleeved on the cylindrical body of the stator seat. The magnetic ring is arranged around the iron core winding. One end of the motor shaft is fixedly connected to the motor upper shell, and the other end passes through the bearing on the cylindrical body and is connected to a magnetic seat. Moreover, at least one of the motor upper shell, the motor lower shell and the stator seat is made of a composite plastic material. Compared with the existing metal motors, the cost can be reduced, the number of parts can be reduced, and the production efficiency can be improved. In addition, the composite material has a relatively high elastic modulus, and better stiffness, chemical resistance and dimensional stability can be obtained. It can ensure that the motor still maintains good stability under the condition of a large load.

Description

Technical Field

[0001] The present application relates to a motor structure, and more particularly to a motor structure applied to a gimbal. Background Art

[0002] A gimbal is a support structure widely used in image acquisition devices (such as camera phones, cameras, video cameras, etc.), which is used to provide stable support for the image acquisition device. Among them, the gimbal has a motor that outputs rotational motion to adjust the position of the image acquisition device.

[0003] Conventional gimbal motors are made of metal materials. Although metal motors have good dimensional stability, they have problems such as long production cycles, high prices, and high material density, resulting in high prices and heavy weights of mobile phone gimbals, and cannot be quickly popularized. Summary of the Invention

[0004] The present application mainly provides a novel gimbal motor and a gimbal for an image acquisition device.

[0005] According to one aspect of the present application, in one embodiment, a gimbal motor is provided, including:

[0006] An upper motor housing;

[0007] A lower motor housing, the upper motor housing and the lower motor housing are oppositely arranged and form an installation cavity;

[0008] A stator seat, the stator seat is installed in the installation cavity and fixedly installed on the lower motor housing. The stator seat has a cylindrical body protruding toward the upper motor housing. A stepped hole is formed in the middle of the cylindrical body, and a bearing is installed in the stepped hole;

[0009] A core winding, the core winding is sleeved on the cylindrical body of the stator seat for generating a rotating magnetic field;

[0010] A magnetic ring, the magnetic ring is fixed to the upper motor housing and is arranged around the core winding;

[0011] A motor shaft, one end of the motor shaft is fixedly connected to the upper motor housing, and the other end passes through the bearing on the cylindrical body and is connected to a magnetic seat;

[0012] And a magnetic encoder magnetic ring, the magnetic encoder magnetic ring is installed on the magnetic seat;

[0013] Wherein, at least one of the upper motor housing, the lower motor housing and the stator seat is made of a composite plastic material.

[0014] As a further improvement of the pan-tilt motor, the upper motor housing is integrally injection-molded. The upper motor housing has a first mounting hole and a first convex rib protruding toward the lower motor housing. The motor shaft is inserted into the first mounting hole, and the first convex rib abuts against the upper end of the stator seat or the bearing.

[0015] As a further improvement of the pan-tilt motor, the first convex rib is arranged around the first mounting hole.

[0016] As a further improvement of the pan-tilt motor, the magnetic seat is an integral structure, which has a second mounting hole and a second convex rib. The second convex rib protrudes toward the upper motor housing. The motor shaft is inserted into the second mounting hole, and the second convex rib abuts against the lower end of the stator seat or the bearing.

[0017] As a further improvement of the pan-tilt motor, the motor shaft is provided with a stop structure for cooperating with the upper motor housing and an anti-disengagement structure for cooperating with the magnetic seat. The stop structure is used to prevent relative movement between the motor shaft and the upper motor housing, and the anti-disengagement structure is used to prevent the motor shaft from separating from the magnetic seat.

[0018] As a further improvement of the pan-tilt motor, the stop structure includes a spiral groove and / or a flat position design.

[0019] As a further improvement of the pan-tilt motor, the anti-disengagement structure is a threaded structure and / or a snap ring structure.

[0020] As a further improvement of the pan-tilt motor, the motor shaft is a metal hollow motor shaft, and the metal hollow motor shaft is fixedly connected to the upper motor housing as a whole by injection molding.

[0021] As a further improvement of the pan-tilt motor, at least one of the upper motor housing, the lower motor housing, and the stator seat is made of a nylon glass fiber composite material.

[0022] According to one aspect of the present application, in an embodiment, a pan-tilt for an image acquisition device is provided, which has the pan-tilt motor as described in any one of the above. The upper motor housing in the pan-tilt motor extends to form a first connecting arm, and the lower motor housing in the pan-tilt motor extends to form a second connecting arm.

[0023] The pan-tilt motor and the pan-tilt according to the above embodiments have a motor upper shell and a motor lower shell oppositely arranged to form an installation cavity. The stator seat is fixedly installed on the motor lower shell, and a bearing is installed in the through hole of the cylindrical body of the stator seat. The iron core winding is sleeved on the cylindrical body of the stator seat. The magnetic ring is arranged around the iron core winding. One end of the motor shaft is fixedly connected to the motor upper shell, and the other end passes through the bearing on the cylindrical body and is connected to a magnetic seat. The iron core winding can generate a rotating magnetic field to drive the motor rotor to rotate. Moreover, at least one of the motor upper shell, the motor lower shell, and the stator seat is made of a composite plastic material, which can reduce costs, reduce the number of components, and improve production efficiency compared with the existing metal motors. In addition, the composite material has a relatively high elastic modulus, and can obtain better stiffness, chemical resistance, and dimensional stability, so that the motor can still maintain good stability under a large load. Description of the Drawings

[0024] Figure 1 is an exploded view of a pan-tilt motor in an embodiment of the present application;

[0025] Figure 2 is a cross-sectional view of the assembled pan-tilt motor in an embodiment of the present application;

[0026] Figure 3 is a cross-sectional view of the motor upper shell in an embodiment of the present application;

[0027] Figure 4 is a cross-sectional view of the magnetic seat in an embodiment of the present application;

[0028] Figure 5 is a cross-sectional view of the motor shaft in an embodiment of the present application. Detailed Embodiments

[0029] The present invention will be further described in detail below in conjunction with the drawings through specific embodiments. Similar elements in different embodiments are labeled with related similar element numbers. In the following embodiments, many details are described to make the present application better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification to avoid the core part of the present application being overwhelmed by excessive description. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0030] In addition, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment and do not mean a necessary sequence, unless it is stated otherwise that a certain sequence must be followed.

[0031] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any sequential or technical meaning. And as used in this application, "connection" and "coupling", unless otherwise specified, both include direct and indirect connection (coupling).

[0032] Embodiment 1:

[0033] This Embodiment 1 provides a pan-tilt motor, which is used to drive a connecting arm to rotate in a pan-tilt to produce different position changes.

[0034] Please refer to Figure 1 and 2 , the pan-tilt motor includes a motor upper housing 5, a motor lower housing 10, a stator base 7, a core winding 2, a magnetic ring 6, a motor shaft 4, a magnetic seat 8, and a magnetic encoder magnetic ring 9.

[0035] The motor upper housing 5 and the motor lower housing 10 are oppositely arranged and form an installation cavity. The motor upper housing 5 and the motor lower housing 10 are in a separated state, so that there is a space for relative rotation between them. The part between the motor upper housing 5 and the motor lower housing 10 forms an installation cavity for installing components such as the stator base 7, the core winding 2, the magnetic ring 6, the motor shaft 4, and the magnetic encoder magnetic ring 9.

[0036] The stator base 7 is installed in the installation cavity and fixedly installed on the motor lower housing 10. The stator base 7 has a cylindrical body 71 protruding towards the motor upper housing 5, and the middle of the cylindrical body 71 has a stepped hole. There is a bearing chamber at each of the upper and lower parts of the stator base 7 for fixedly installing bearings 11 and 12 in the stepped hole.

[0037] The core winding 2 is sleeved on the cylindrical body 71 of the stator base 7 and is fixed on the stator base 7. The core winding 2 is used to generate a rotating magnetic field to drive the rotation of the motor rotor. The magnetic ring 6 is fixed to the motor upper housing and is arranged around the core winding 2. There is a certain gap between the magnetic ring 6 and the core winding 2. The magnetic ring 6 is used to generate a magnetic field

[0038] One end of the motor shaft 4 is fixedly connected to the motor upper shell 5, so that the motor shaft 4 can be linked with the motor upper shell 5. The other end of the motor shaft 4 passes through the bearings 11 and 12 on the cylindrical body 71 and is connected to a magnetic seat 8. Under the action of the magnetic field, the magnetic seat 8 and the motor shaft 4 rotate together. The magnetic encoder magnetic ring 9 is installed on the magnetic seat 8 and generates induction with the magnetic encoder to detect the rotation angle of the motor.

[0039] At least one of the motor upper shell 5, the motor lower shell 10 and the stator seat 7 is made of composite plastic material, which can reduce costs, reduce the number of parts and components, and improve production efficiency compared to existing metal motors.

[0040] The composite material has a higher elastic modulus, which can provide better stiffness, chemical resistance and dimensional stability, and can enable the motor to maintain good stability under heavy loads.

[0041] For further information, please refer to Figure 2 and 3 In one embodiment, the motor upper shell 5 is integrally injection molded, and the motor upper shell 5 has a first mounting hole 5002 and a first ridge 5003 protruding toward one side of the motor lower shell 10, the motor shaft 4 is inserted into the first mounting hole 5002, and the first ridge 5003 abuts against the upper end of the inner ring of the bearing 11.

[0042] The first ridge 5003 can be used to replace the washer, which can reduce the use of the washer. Since the motor lower shell 10 is integrally injection molded, compared with the washer and motor shell that usually adopt a separate structure, this structure can improve the rigidity of the motor, reduce the number of parts, and improve production efficiency.

[0043] Please refer to Figure 3 In one embodiment, the first ridge 5003 is disposed around the first mounting hole 5002. Specifically, the first ridge 5003 may be formed by extending from the lower end of the mounting hole wall.

[0044] For further information, please refer to Figure 2 and 4 In one embodiment, the magnetic base 8 has a second mounting hole 8003 and a second ridge 8002 , the second ridge 8002 protrudes toward one side of the motor upper shell 5 , the motor shaft 4 is inserted into the second mounting hole 8003 , and the second ridge 8002 abuts against the lower end of the inner ring of the bearing 12 .

[0045] The magnetic base 8 is an integrated structure, and the second convex ridge 8002 can replace the washer. Therefore, this structure can reduce the use of washers, improve the rigidity of the motor, reduce the number of parts, and improve production efficiency.

[0046] Further, in one embodiment, the motor shaft 4 is provided with a stop structure for cooperating with the motor upper housing 5 and an anti - detachment structure for cooperating with the magnetic base 8. The stop structure is used to prevent relative movement between the motor shaft 4 and the motor upper housing 5, especially to avoid relative rotational movement between the motor shaft 4 and the motor upper housing 5. The anti - detachment structure is used to prevent the motor shaft 4 from separating from the magnetic base 8, which may cause changes or even separation of the relative positions of the stator and the rotor.

[0047] Please refer to Figure 2 and 5 , in one embodiment, the stop structure includes a spiral groove 4003 and / or a flat position design. The flat position design means that one end of the motor shaft 4 is set to be non - cylindrical, and then it is fixed through a non - circular hole on the motor upper housing 5. For example, two flats, that is, planes, are added to the shaft. Correspondingly, the hole is also provided with corresponding flats, and the two cooperate to play a role in preventing rotation.

[0048] Please continue to refer to Figure 2 、 4 and 5, in one embodiment, the anti - detachment structure is a thread structure 4002 and / or a snap - ring structure, and the magnetic base 8 is provided with corresponding structures, such as a thread structure 8004, for cooperating with the thread structure or the snap - ring structure.

[0049] Further, please continue to refer to Figure 5 , in one embodiment, the motor shaft 4 is a metal hollow motor shaft 4, and the motor upper housing 5 is provided with a wire groove 5004. The hollow motor shaft 4 can reduce the difficulty of threading. The metal hollow motor shaft 4 is integrally fixed to the motor upper housing 5 by injection molding, so that the motor shaft 4 does not deform after applying a load, and the number of processes is reduced, improving production efficiency.

[0050] In addition, the motor shaft 4 and the motor upper housing 5 can also be fixed by glue connection or interference fit.

[0051] The composite material has high - modulus elasticity and can obtain good stiffness, chemical resistance and dimensional stability. In one embodiment, at least one of the motor upper housing 5, the motor lower housing 10 and the stator base 7 is made of nylon - glass fiber composite material (nylon plus glass fiber composite material).

[0052] Further, please refer to Figure 2 , the iron core winding 2 and the outer wall of the stator base 7 are in clearance fit, and the two are fixed by glue connection; or the iron core winding 2 and the outer wall of the stator base 7 are in interference fit.

[0053] Further, please continue to refer to Figure 2 , the stator base 7 and the motor lower housing 1010 can be fixedly connected by screws or other means.

[0054] Embodiment 2

[0055] Embodiment 2 provides a pan-tilt for an image acquisition device.

[0056] The pan-tilt has a pan-tilt motor as described in Embodiment 1. Among them, a first connecting arm extends from the motor upper housing of the pan-tilt motor, and a second connecting arm extends from the motor lower housing of the pan-tilt motor. The first connecting arm and the second connecting arm can perform relative rotational movement.

[0057] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the technical field to which the present invention pertains, based on the idea of the present invention, several simple deductions, deformations, or substitutions can also be made.

Claims

1. A pan-tilt motor, characterized in that, it includes: an upper motor housing; a lower motor housing, the upper motor housing and the lower motor housing are oppositely arranged and form an installation cavity; a stator base, the stator base is installed in the installation cavity and fixedly installed on the lower motor housing, the stator base has a cylindrical body protruding towards the upper motor housing side, a stepped hole is provided in the middle of the cylindrical body, and a bearing is installed in the stepped hole; a core winding, the core winding is sleeved on the cylindrical body of the stator base for generating a rotating magnetic field; a magnetic ring, the magnetic ring is fixed to the upper motor housing and arranged around the core winding; a motor shaft, one end of the motor shaft is fixedly connected to the upper motor housing, and the other end passes through the bearing on the cylindrical body and is connected to a magnetic seat; and a magnetic encoder magnetic ring, the magnetic encoder magnetic ring is installed on the magnetic seat and induces with the magnetic encoder to detect the rotation angle of the motor; wherein, at least one of the upper motor housing, the lower motor housing and the stator base is made of a composite plastic material; the magnetic seat is arranged in the installation cavity, the magnetic seat is an integral structure, it has a second installation hole and a second convex rib, the second convex rib protrudes towards the upper motor housing side, the motor shaft is inserted into the second installation hole, and the second convex rib abuts against the lower end of the inner ring of the bearing; the second installation hole includes a first hole and a second hole that are communicated, the diameter of the second hole is larger than that of the first hole, the first hole is provided with an internal thread structure, and the second hole is used to place the magnetic encoder magnetic ring; the motor shaft is provided with an anti-disengagement structure that cooperates with the magnetic seat, and the anti-disengagement structure is used to prevent the motor shaft from separating from the magnetic seat; the upper motor housing is integrally injection-molded, the upper motor housing has a first installation hole and a first convex rib protruding towards the lower motor housing side, the motor shaft is inserted into the first installation hole, and the first convex rib abuts against the upper end of the inner ring of the bearing.

2. The pan-tilt motor according to claim 1, characterized in that, the first convex rib is arranged around the first installation hole.

3. The pan-tilt motor according to claim 1, characterized in that, the motor shaft is provided with a stop structure that cooperates with the upper motor housing, and the stop structure is used to prevent relative movement between the motor shaft and the upper motor housing.

4. The pan-tilt motor according to claim 3, characterized in that, the stop structure includes a spiral groove or a flat position design.

5. The pan-tilt motor according to claim 1, characterized in that, the anti-disengagement structure is a thread structure or a snap ring structure.

6. The pan-tilt motor according to claim 1, characterized in that, the motor shaft is a metal hollow motor shaft, and the metal hollow motor shaft is fixedly connected to the upper motor housing as a whole by injection molding.

7. The pan-tilt motor according to any one of claims 1-6, characterized in that, at least one of the upper motor housing, the lower motor housing and the stator base is made of a nylon glass fiber composite material.

8. A pan-tilt for an image acquisition device, characterized in that, it has the pan-tilt motor according to any one of claims 1-7, the upper motor housing in the pan-tilt motor extends to form a first connecting arm, and the lower motor housing in the pan-tilt motor extends to form a second connecting arm.

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