Pan-tilt motor, pan-tilt and unmanned aerial vehicle

Abstract

The present disclosure relates to a pan-tilt motor, a pan-tilt, and a drone. The pan-tilt motor includes a stator assembly, a rotor assembly, a rotating shaft fixedly connected to the rotor assembly, and a bearing assembly installed between the rotating shaft and the stator assembly. The rotor assembly rotates around the stator assembly through the bearing assembly with respect to the rotating shaft. The pan-tilt motor further includes a fixing member integrally formed with the bearing assembly and the rotating shaft. The fixing member is used to fixedly connect the bearing assembly and the rotating shaft, and the fixing member maintains the pre-tightening force exerted by the rotating shaft on the bearing assembly to eliminate the axial clearance of the bearing assembly. By using an integrally formed fixing member to connect between the bearing assembly and the rotating shaft of the pan-tilt motor, the fixing member not only plays the role of a circlip to define the positions of the bearing assembly and the rotating shaft, but also can maintain the pre-tightening force exerted on the bearing assembly to eliminate the axial clearance of the bearing assembly, thereby improving the smoothness and high precision of the operation of the motor assembly.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of unmanned aerial vehicles, and relates to a pan-tilt motor, a pan-tilt, and an unmanned aerial vehicle. Background Art

[0002] In the related art, during the use of a pan-tilt camera of an unmanned aerial vehicle or a handheld pan-tilt camera, accidental situations such as dropping or impact may occur. Since a pan-tilt motor for controlling the shooting angle is provided in both the handheld or the pan-tilt camera mounted on the unmanned aerial vehicle, the requirements for the rotation force, reliability, and shock resistance of the pan-tilt motor are also getting higher and higher. Therefore, the pan-tilt motor needs to have a small rotation force, a uniform force, no jitter, and be able to maintain normal functions when subjected to certain impact drops and other accidental situations.

[0003] In the related art, the pan-tilt motor includes a stator assembly, a rotor assembly, a rotating shaft fixedly connected to the rotor assembly, and a bearing member installed between the rotating shaft and the stator assembly. The connection between the rotating shaft and the bearing member is a key factor affecting the operation of the pan-tilt motor. And the bearing itself has a clearance, which needs to be adjusted by the pre-tightening force acting on each other with the rotating shaft. The connection between the rotating shaft and the bearing member in the pan-tilt motor can include the following forms: First, directly bonded by glue. Second, directly locking the bearing member through a nut member screwed onto the rotating shaft or elastically abutting the bearing member through an elastic member such as a rubber ring and a spring member in combination with the nut member. Third, locking the bearing member by installing a snap ring and other components on the rotating shaft.

[0004] However, for the pan-tilt camera connected by the first method, after being impacted, the rotating shaft and the bearing member are easily de-bonded, resulting in the bearing member losing the pre-tightening force and generating a clearance, and the pan-tilt shakes during rotation, affecting the rotation accuracy and shooting quality of the pan-tilt. For the pan-tilt camera connected by the second method, its connection structure is increased, and the complexity of the pan-tilt motor is improved. At the same time, due to the differences and non-linear characteristics of the elastic members, the consistency of the pre-tightening force acting on the bearing member is poor. For the pan-tilt camera connected by the third method, components such as snap rings can only limit the position of the bearing member, but cannot eliminate the clearance of the bearing member, affecting the rotation accuracy of the pan-tilt motor. Summary of the Invention

[0005] In view of this, the present disclosure provides a pan-tilt motor, a pan-tilt, and an unmanned aerial vehicle.

[0006] Specifically, the present disclosure is implemented through the following technical solutions:

[0007] According to a first aspect of an embodiment of the present disclosure, a pan-tilt motor is provided, including a stator assembly, a rotor assembly, a rotating shaft fixedly connected to the rotor assembly, and a bearing assembly installed between the rotating shaft and the stator assembly. The rotor assembly rotates around the stator assembly through the bearing assembly, and the pan-tilt motor further includes a fixing member integrally formed on the bearing assembly and the rotating shaft. The fixing member is used to fixedly connect the bearing assembly and the rotating shaft, and the fixing member maintains the pre-tightening force of the rotating shaft acting on the bearing assembly to eliminate the axial clearance of the bearing assembly.

[0008] In one embodiment, both the bearing assembly and the rotating shaft are locally recessed at a preset position to form a curing space, and the fixing member is filled and cured in the curing space.

[0009] In one embodiment, a feeding channel communicating with the curing space is provided on the bearing assembly and / or the rotating shaft.

[0010] In one embodiment, the rotating shaft includes a main body portion and a groove portion locally recessed from the surface of the main body portion. The bearing assembly is assembled to the main body portion under a preset pre-tightening force, and the fixing member is formed in the groove portion and extends to the bearing assembly to maintain the pre-tightening force acting on the bearing assembly.

[0011] In one embodiment, the groove portion is annularly provided on the main body portion.

[0012] In one embodiment, the bearing assembly and the main body portion are adhesively connected.

[0013] In one embodiment, the bearing assembly includes an annular inner ring, and a clamping groove portion is formed by recessing from the surface of the inner ring. The inner ring is assembled to the rotating shaft under a preset pre-tightening force, and the fixing member is formed in the clamping groove portion and extends to the rotating shaft to maintain the pre-tightening force acting on the inner ring.

[0014] In one embodiment, the clamping groove portion is annularly provided on the inner side surface of the inner ring.

[0015] In one embodiment, the inner ring and the rotating shaft are adhesively connected.

[0016] In one embodiment, the bearing assembly includes an inner ring assembled to the rotating shaft and an abutting member. The abutting member abuts against the inner ring, and an adhesive groove portion is formed by recessing from the surface of the abutting member. The fixing member is formed in the adhesive groove portion and extends to the rotating shaft to enable the abutting member to maintain the pre-tightening force acting on the inner ring.

[0017] In one embodiment, the abutting member includes a body portion provided with a through hole matching the rotating shaft, and the glue groove portion is annularly arranged on the inner side surface of the through hole.

[0018] In one embodiment, the abutting member further includes a stepped portion extending from one end of the body portion to the glue groove portion, the inner diameter of the stepped portion is smaller than the turning inner diameter of the glue groove portion and larger than the inner diameter of the through hole.

[0019] In one embodiment, the body portion and the rotating shaft are adhesively connected.

[0020] According to a second aspect of the embodiments of the present disclosure, a pan-tilt is provided, including the pan-tilt motor as described above.

[0021] According to a third aspect of the embodiments of the present disclosure, a drone is provided, including the pan-tilt as described above.

[0022] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0023] A fixing member integrally formed is used to connect the bearing assembly and the rotating shaft of the pan-tilt motor. The fixing member not only plays the role of a circlip to limit the positions of the bearing assembly and the rotating shaft, but also can maintain the preload force acting on the bearing assembly to eliminate the axial clearance of the bearing assembly, improving the smoothness and high-precision performance of the operation of the motor assembly. The fixing member is integrally formed between the bearing assembly and the rotating shaft, and its shape can be adjusted according to the processing parts of the bearing assembly and the rotating shaft and firmly adsorbed on the contact surface, with high processing efficiency and good consistency of the pan-tilt motor. The fixing member integrally formed between the bearing assembly and the rotating shaft forms a circlip structure, with good anti-drop effect.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic cross-sectional structure view of a pan-tilt motor shown according to an exemplary embodiment.

[0026] Figure 2 is a schematic cross-sectional structure view of another pan-tilt motor shown according to an exemplary embodiment.

[0027] Wherein, rotor assembly 10; magnetic member 11; stator assembly 20; iron core winding 21; rotating shaft 30; groove portion 31; main body portion 32; bearing assembly 40; inner ring 41; card slot portion 42; fixing member 50; abutting member 60; glue groove portion 61; body portion 62; through hole 63; stepped portion 64; feed channel 70. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] The terms used in the present disclosure are for the purpose of describing particular embodiments only and are not intended to limit the present disclosure. The singular forms "a", "the", and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0030] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0031] Figure 1 is a schematic cross-sectional structure diagram of a pan-tilt motor shown according to an exemplary embodiment.

[0032] Figure 2 is another schematic cross-sectional structure diagram of a pan-tilt motor shown according to an exemplary embodiment.

[0033] As Figure 1 and Figure 2 shown, a pan-tilt can be installed on both a handheld pan-tilt device and a drone to drive the pan-tilt camera to adjust the shooting angle. Correspondingly, a pan-tilt motor is provided on the pan-tilt, and the pan-tilt motor rotates to drive the pan-tilt camera or other components connected to the pan-tilt motor to rotate.

[0034] In one embodiment, a pan-tilt motor includes a stator assembly 20, a rotor assembly 10, a rotating shaft 30 fixedly connected to the rotor assembly 10, and a bearing assembly 40 installed between the rotating shaft 30 and the stator assembly 20. The rotor assembly 10 rotates around the stator assembly 20 through the bearing assembly 40 with the rotating shaft 30. The stator assembly 20 is fixedly arranged, such as fixed on a frame or fixed on another pan-tilt motor. At least a part of the rotor assembly 10 is sleeved outside the stator assembly 20, and a magnetic member 11 of the rotor assembly 10 is arranged corresponding to a core winding 21 of the stator assembly 20 so as to drive through magnetic induction between the two. The rotating shaft 30 penetrates through the stator assembly 20 and the rotor assembly 10 and is located at the center. Among them, the rotor assembly 10 is fixed to one end of the rotating shaft 30, and the other end of the rotating shaft 30 penetrates through the stator assembly 20 and is rotatably connected to the stator assembly 20 through the bearing assembly 40.

[0035] The pan-tilt motor further includes a fixing member 50 integrally formed with the bearing assembly 40 and the rotating shaft 30. The fixing member 50 is used to fixedly connect the bearing assembly 40 and the rotating shaft 30, and the fixing member 50 maintains the pre-tightening force of the rotating shaft 30 acting on the bearing assembly 40 to eliminate the axial clearance of the bearing assembly 40.

[0036] The rotating shaft 30 is fixed on the rotor assembly 10 and is connected to the stator assembly 20 through the bearing assembly 40. Among them, the bearing assembly 40 includes an inner ring 41, an outer ring, and rolling elements arranged between the inner ring 41 and the outer ring. Among them, the inner ring 41 is fixed to the rotating shaft 30, and the outer ring is fixed on the stator assembly 20. Due to the processing and assembly process of the bearing assembly 40, the bearing assembly 40 has an axial clearance, and this axial clearance will affect the accuracy and stability of the rotation angle and position of the pan-tilt motor.

[0037] A pre-tightening force is set on the inner ring 41 of the bearing assembly 40. For example, a pre-tightening force is applied along the axial direction of the inner ring 41 to eliminate the axial clearance of the bearing assembly 40. A fixing member 50 is integrally formed between the bearing assembly 40 with an axial pre-tightening force and the rotating shaft 30. The fixing member 50 can be cured and formed into a rigid structure. The relative position of the bearing assembly 40 and the rotating shaft 30 is stable, and the fixing bracket can maintain the pre-tightening force between the bearing assembly 40 and the rotating shaft 30. The fixing member 50 plays the role of a snap ring to limit the positions of the bearing assembly 40 and the rotating shaft 30, and can also maintain the pre-tightening force acting on the bearing assembly 40 to eliminate the axial clearance of the bearing assembly 40, improving the smoothness and high precision of the operation of the motor assembly. The fixing member 50 is integrally formed on the bearing assembly 40 and the rotating shaft 30, and its shape can be adjusted according to the processing parts of the bearing assembly 40 and firmly adsorbed on the contact surface, with high processing efficiency and good consistency of the pan-tilt motor. The fixing member 50 integrally formed on the bearing assembly 40 and the rotating shaft 30 forms a snap ring structure, and has a good anti-drop effect.

[0038] The curing position of the fixing member 50 on the bearing assembly 40 and the rotating shaft 30 can be adjusted according to design requirements, such as being formed between the outer surface of the rotating shaft 30 and the inner surface of the inner ring 41 of the bearing assembly 40; or being formed at the mating positions such as the end faces of the rotating shaft 30 and the inner ring 41 of the bearing assembly 40. It can cure and connect the bearing assembly 40 and the rotating shaft 30 into one body and maintain the pre-tightening force required to eliminate the clearance of the bearing assembly 40.

[0039] In one embodiment, both the bearing assembly 40 and the rotating shaft 30 are partially recessed at a preset position to form a curing space, and the fixing member 50 is filled and cured in the curing space. The preset position can be set as the contact surface between the inner ring 41 of the bearing assembly 40 and the rotating shaft 30. For example, a recessed space is provided on the inner ring 41, and correspondingly, another recessed space is provided on the surface of the rotating shaft 30. When the bearing assembly 40 is assembled to the rotating shaft 30 under the action of the pre-tightening force, the recessed space of the inner ring 41 and the recessed space of the rotating shaft 30 are closed to each other to form a curing space. For example, the centers of the recessed space of the inner ring 41 and the recessed space of the rotating shaft 30 coincide to form a curing space with balanced stress.

[0040] After the fixing member 50 is filled from the liquid state into the curing space and after maintaining a preset time, the fixing member 50 is transformed from the liquid state into the solid state and has a preset rigid strength to maintain the pre-tightening force between the rotating shaft 30 and the bearing assembly 40. Among them, during the process of the fixing member 50 being transformed from the liquid state to the solid state, the bearing assembly 40 maintains a preset pre-tightening force under the action of an external pressure.

[0041] The fixing member 50 is filled from the liquid state into the curing space, and has a large contact area with the rotating shaft 30 and the bearing assembly 40 and strong adsorption force, so the connection effect between the rotating shaft 30 and the bearing assembly 40 is good. The fixing member 50 is simultaneously clamped between the rotating shaft 30 and the bearing assembly 40 to form a snap ring structure, which can improve the impact resistance of the pan-tilt motor. After the fixing member 50 is cured, it has good rigidity. After the pre-tightening force acting on the bearing assembly 40 is removed, the pre-tightening force received by the bearing assembly 40 is maintained between the rotating shaft 30 and the bearing assembly 40 through the fixing member 50. The clearance of the bearing assembly 40 is small, and the running stability of the pan-tilt motor is good.

[0042] The rotating shaft 30 is the connecting part for connecting the stator assembly 20 and the rotor assembly 10. The outer surface of the rotating shaft 30 is used to install the axis assembly, and a recessed space for cooperating with the bearing assembly 40 is further provided. In one embodiment, the rotating shaft 30 includes a main body portion 32 and a groove portion 31 formed by partially recessing from the surface of the main body portion 32. The main body portion 32 can be in a solid columnar shape or a circular tubular shape, and it adopts a hollow shaft structure. Cables, signal lines, etc. can be passed through the rotating shaft 30. The rotating shaft 30 adopting a hollow shaft structure can reduce the weight of the rotating shaft 30 and is suitable for electronic devices such as aircraft and handheld pan-tilts.

[0043] The groove portion 31 is provided on the outer surface of the main body portion 32 and is formed by being recessed from the surface of the main body portion 32. Its shape can be matched according to the position and shape of the connection with the bearing assembly 40. For example, the groove portion 31 is provided in the shape of spaced pits, spaced grooves, annular grooves and other groove shapes, and the groove portion 31 can accommodate the liquid molding material for forming the fixing member 50. In one embodiment, the groove portion 31 is annularly provided on the main body portion 32. The groove portion 31 forms an annular recessed portion on the outer surface of the main body portion 32, and the contact surface between the groove portion 31 and the bearing assembly 40 is uniform. After the fixing member 50 is formed in the groove portion 31, the pre-tightening force between the bearing assembly 40 and the rotating shaft 30 can be transmitted evenly. Among them, the pre-tightening force between the bearing assembly 40 and the rotating shaft 30 can be applied by the following steps:

[0044] The bearing assembly 40 is assembled to the main body portion 32 under a preset pre-tightening force.

[0045] Inject the liquid molding material into the groove portion 31 and spread it to the bearing assembly 40, and at the same time, the external pre-tightening force continues to act on the bearing assembly 40.

[0046] After a preset time interval, the fixing member 50 is solidified and formed in the groove portion 31 and extends to the bearing assembly 40.

[0047] Withdraw the external pre-tightening force acting on the bearing assembly 40, and the fixing member 50 is clamped between the main body portion 32 and the bearing assembly 40 to maintain the pre-tightening force acting on the bearing assembly 40.

[0048] To further improve the connection strength between the bearing assembly 40 and the rotating shaft 30, an adhesive is coated on the contact surface between the bearing assembly 40 and the main body portion 32 so that the two are adhesively connected. This step can be carried out simultaneously with the step of assembling the bearing assembly 40 to the main body portion 32 under a preset pre-tightening force.

[0049] When the bearing assembly 40 and the rotating shaft 30 are in an assembled state, a preset pre-tightening force is applied to the bearing assembly 40 to eliminate the clearance of the bearing assembly 40. The pre-tightening force is externally applied to the bearing assembly 40, such as by placing a pressing block with a preset weight on the inner ring 41 of the bearing assembly 40, and the gravitational force of the pressing block acts on the bearing assembly 40 to form a pre-tightening force, or a stable and balanced pre-tightening force is applied by equipment such as a hydraulic cylinder.

[0050] An adhesive is coated on the contact surface between the bearing assembly 40 and the rotating shaft 30. When the bearing assembly 40 is assembled to the preset position of the rotating shaft 30, the bearing assembly 40 and the rotating shaft 30 are adhesively connected through the adhesive to stabilize the installation position of the bearing assembly 40. At the same time, the bearing assembly 40 eliminates the clearance under the action of the pre-tightening force.

[0051] The liquid molding material is injected into the groove portion 31 and cured after a preset time to form a fixing member 50. The fixing member 50 is rigid and adheres to the surfaces of the bearing assembly 40 and the groove portion 31. It has a large force-bearing area and forms a circlip structure, which is convenient for processing and has high connection reliability. The liquid molding material can be an adhesive, plastic, or other curing materials. After the molding material is cured, a rigid fixing member 50 is formed.

[0052] The bearing assembly 40 includes two bearing members and / or a contact member 60 that matches the bearing members. The two bearing members are installed side by side on the rotating shaft 30. Among them, the inner rings 41 of the two bearing members are fixedly connected to the rotating shaft 30, and the outer rings are fixedly connected to the stator assembly 20. The fixing member 50 can be formed on the inner ring 41 of the bearing member or on the contact member 60 so that both bearing members can maintain a pre-tightening force.

[0053] As Figure 1 shown, the inner ring 41 of the bearing assembly 40 is provided with a recessed space for cooperating with the rotating shaft 30 to form the fixing member 50. In one embodiment, the bearing assembly 40 includes an annular inner ring 41, and the inner ring 41 is provided with a card slot portion 42 formed by recessing from the surface. When the bearing assembly 40 is installed on the rotating shaft 30, the card slot portion 42 is disposed opposite to the opening of the groove portion 31 on the rotating shaft 30, and the two form a curing space. The liquid molding material is injected into the card slot portion 42 and the groove portion 31, and the fixing member 50 formed by curing the molding material adheres to the surfaces of the card slot portion 42 and the groove portion 31, and has a strong adsorption force. Moreover, the inner ring 41 is assembled to the rotating shaft 30 under a preset pre-tightening force, and the fixing member 50 is formed in the card slot portion 42 and extends to the rotating shaft 30 to maintain the pre-tightening force acting on the inner ring 41.

[0054] The shape and position of the card slot portion 42 match or cover the groove portion 31. For example, if the card slot portion 42 is a ring structure, the groove portion 31 can be set as a dot-shaped recessed structure or a ring-shaped recessed structure, where the card slot portion 42 and the groove portion 31 at least partially overlap. In order to increase the adsorption area between the card slot portion 42 and the fixing member 50 and the uniformity of the force on the inner ring 41. In one embodiment, the card slot portion 42 is annularly provided on the inner side surface of the inner ring 41. Optionally, the groove portion 31 is also set as a ring structure.

[0055] The bearing assembly 40 is connected by the fixing member 50 formed between the card slot portion 42 and the rotating shaft 30. In one embodiment, the inner ring 41 and the rotating shaft 30 are adhesively connected. That is, an adhesive is coated on the mating surface between the inner ring 41 and the rotating shaft 30 to improve the connection strength between the two. The bearing assembly 40 and the rotating shaft 30 are connected by an adhesive, which can improve the force-bearing condition of the fixing member 50 and improve the running stability of the pan-tilt motor.

[0056] As Figure 2As shown, the bearing assembly 40 includes an inner ring 41 and an abutting member 60. The inner ring 41 is matingly connected to the rotating shaft 30. The abutting member 60 abuts against the inner ring 41 and has a recessed space, and is cooperated with the rotating shaft 30 to form a fixing member 50. In one embodiment, the bearing assembly 40 includes an inner ring 41 assembled on the rotating shaft 30 and an abutting member 60 assembled on the rotating shaft 30. Among them, the abutting member 60 abuts against the inner ring 41 under a preset pre-tightening force. Two bearing members are respectively installed on the rotating shaft 30, and the inner rings 41 of the bearing members are all matingly assembled with the rotating shaft 30. In one embodiment, the inner ring 41 and the rotating shaft 30 are adhesively connected.

[0057] The abutting member 60 is installed on the rotating shaft 30 and transmits a pre-tightening force to the two bearing members to eliminate the axial clearance of the two bearing members. In one embodiment, the abutting member 60 is provided with an adhesive groove portion 61 formed by recessing from the surface, and the fixing member 50 is formed in the adhesive groove portion 61 and extends to the rotating shaft 30, so that the abutting member 60 maintains the pre-tightening force acting on the inner ring 41.

[0058] When the abutting member 60 is installed on the rotating shaft 30, the adhesive groove portion 61 is disposed opposite to the opening of the groove portion 31 on the rotating shaft 30, and the two form a curing space. And, the abutting member 60 abuts against the inner ring 41 under a preset pre-tightening force, so that the bearing member eliminates the clearance under the action of the pre-tightening force. The liquid molding material is injected into the adhesive groove portion 61 and the groove portion 31, and the fixing member 50 formed by curing the molding material adheres to the surfaces of the adhesive groove portion 61 and the groove portion 31, and has a strong adsorption force. The fixing member 50 is formed in the adhesive groove portion 61 and extends to the groove portion 31 of the rotating shaft 30 to maintain the pre-tightening force of the abutting member 60 acting on the inner ring 41.

[0059] The shape and position of the adhesive groove portion 61 match or cover the groove portion 31. For example, the adhesive groove portion 61 is a ring structure, and the groove portion 31 can be set as a dot-shaped recess structure or a ring-shaped recess structure, or the width of the adhesive groove portion 61 is less than, greater than or equal to the width of the groove portion 31, wherein the adhesive groove portion 61 and the groove portion 31 at least partially overlap. The adsorption area of the adhesive groove portion 61 and the fixing member 50 is increased, and the uniformity of the force on the inner ring 41 is improved. In one embodiment, the adhesive groove portion 61 is annularly disposed on the inner side surface of the inner ring 41. Optionally, the groove portion 31 is also set as a ring structure.

[0060] The rotating shaft 30 and the abutting member 60 cooperate to adjust the forming position of the fixing member 50, and improve the stress conditions of the rotating shaft 30 and the bearing member. The adhesive groove portion 61 is machined on the abutting member 60, and the machining is convenient, which can avoid the secondary machining of the bearing member, and the running accuracy of the bearing member is high. The abutting member 60 can be machined by using the existing fittings installed on the rotating shaft 30, and has little influence on the weight and structural complexity of the pan-tilt motor.

[0061] In one embodiment, the abutting member 60 includes a body portion 62. The body portion 62 is provided with a through hole 63 that matches the rotating shaft 30. The glue groove portion 61 is annularly arranged on the inner side surface of the through hole 63. The body portion 62 is sleeved on the rotating shaft 30, and the inner wall surface of its through hole 63 cooperates with the outer wall surface of the rotating shaft 30. The glue groove portion 61 corresponds to the groove portion 31 on the rotating shaft 30 at the inner wall surface of the through hole 63, so that after the fixing member 50 is cured and formed, a snap spring structure that is clamped between the abutting member 60 and the rotating shaft 30 can be formed. In one embodiment, the body portion 62 and the rotating shaft 30 are adhesively connected, and the inner ring 41 of the bearing member is adhesively connected to the rotating shaft 30.

[0062] A curing space is formed between the glue groove portion 61 / the clamping groove portion 42 and the groove portion 31. Correspondingly, a feeding channel 70 that communicates with the curing space is provided on the bearing assembly 40 and / or the rotating shaft 30. The feeding channel 70 can be at least one hole-shaped channel that communicates with the curing space, or an annular channel that surrounds the rotating shaft 30 and intersects to the curing space. For example, a stepped structure is provided on the rotating shaft 30 and / or the bearing assembly 40, and the stepped structure forms an annular channel that communicates with the curing space between the rotating shaft 30 and the bearing assembly 40.

[0063] In one embodiment, the abutting member 60 further includes a stepped portion 64 that extends from one end of the body portion 62 to the glue groove portion 61. The inner diameter of the stepped portion 64 is smaller than the turning inner diameter of the glue groove portion 61, and the inner diameter of the stepped portion 64 is larger than the inner diameter of the through hole 63.

[0064] An annular feeding channel 70 is formed between the inner surface of the stepped portion 64 and the outer surface of the rotating shaft 30, and the annular channel communicates with the curing space. The liquefied molding material can enter the curing space along the feeding channel 70 to cure and form a fixing member 50.

[0065] In another embodiment, the rotating shaft 30 is provided as a stepped shaft, and the stepped shaft includes a large shaft portion and a small shaft portion. The outer diameter of the large shaft portion is larger than the outer diameter of the small shaft portion. The groove portion 31 is located at the intersection of the large shaft portion and the small shaft portion. The bearing assembly 40 is assembled to the large shaft portion, and an annular feeding channel 70 is formed between the bearing assembly 40 and the outer surface of the small shaft portion, and the annular channel communicates with the curing space. The liquefied molding material can enter the curing space along the feeding channel 70 to cure and form a fixing member 50.

[0066] By machining the feeding channel 70 on the rotating shaft 30 and / or the abutting member 60, it is convenient to input the liquid molding material. The curing space is only communicated with the feeding channel 70, and the shape of the formed fixing member 50 accommodated therein is stable and has good controllability. The fixing member 50 is filled with liquid, and it can adapt to different curing spaces, has strong adaptability and good matching.

[0067] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only to be considered exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0068] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A pan-tilt motor includes a stator assembly, a rotor assembly, a rotating shaft fixedly connected to the rotor assembly, and a bearing assembly installed between the rotating shaft and the stator assembly. The rotor assembly rotates around the stator assembly through the bearing assembly with the rotating shaft. Characterized in that, The pan-tilt motor further includes a fixing member integrally formed on the bearing assembly and the rotating shaft. The fixing member is used to fixedly connect the bearing assembly and the rotating shaft, and the fixing member maintains the pre-tightening force of the rotating shaft acting on the bearing assembly to eliminate the axial clearance of the bearing assembly; The rotating shaft includes a main body portion and a groove portion formed by partial depression on the surface of the main body portion. The bearing assembly includes an annular inner ring, and the inner ring is provided with a groove portion formed by depression on the surface. When the bearing assembly is installed on the rotating shaft, the groove portion and the opening of the groove portion are oppositely arranged, and the two form a curing space; The fixing member is filled into the curing space in a liquid state. After maintaining for a preset time, the fixing member is transformed from a liquid state into a solid state and has a preset rigid strength to fixedly connect the bearing assembly and the rotating shaft and maintain the pre-tightening force between the rotating shaft and the bearing assembly.

2. The pan-tilt motor according to claim 1, Characterized in that, The bearing assembly and / or the rotating shaft is provided with a feed channel communicating with the curing space.

3. The pan-tilt motor according to claim 1, Characterized in that, The groove portion is annularly arranged on the main body portion.

4. The pan-tilt motor according to claim 1, Characterized in that, The bearing assembly is adhesively connected to the main body portion.

5. The pan-tilt motor according to claim 1, Characterized in that, The groove portion is annularly arranged on the inner side surface of the inner ring.

6. The pan-tilt motor according to claim 1, Characterized in that, The inner ring is adhesively connected to the rotating shaft.

7. The pan-tilt motor according to any one of claims 1 to 4, Characterized in that, The bearing assembly includes an inner ring assembled on the rotating shaft and an abutting member. The abutting member abuts against the inner ring. The abutting member is provided with a glue groove portion formed by depression on the surface. The fixing member is formed in the glue groove portion and extends to the rotating shaft so that the abutting member maintains the pre-tightening force acting on the inner ring.

8. The pan-tilt motor according to claim 7, Characterized in that, The abutting member includes a main body portion. The main body portion is provided with a through hole matching the rotating shaft. The glue groove portion is annularly arranged on the inner side surface of the through hole.

9. The pan-tilt motor according to claim 8, Characterized in that, The abutting member further includes a stepped portion extending from one end of the main body portion to the glue groove portion. The inner diameter of the stepped portion is smaller than the rotational inner diameter of the glue groove portion and larger than the inner diameter of the through hole.

10. The pan-tilt motor according to claim 8, Characterized in that, The main body portion is adhesively connected to the rotating shaft.

11. A pan-tilt, Characterized in that, It includes the pan-tilt motor according to any one of claims 1 to 10.

12. An unmanned aerial vehicle, Characterized in that, It includes the pan-tilt according to claim 11.

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