CN218762390U - Rotating device and image pickup apparatus - Google Patents

Abstract

The application provides a rotating device and an image pickup apparatus. The rotating device comprises a first member, a second member and a connecting component. The second member is provided with a fitting hole. The first member passes through the fitting hole. The connecting assembly rotatably connects the second member to the first member. The connecting component comprises a first bearing, a second bearing and an elastic piece. The first bearing and the second bearing are accommodated in the assembling hole. The first bearing comprises a first inner ring and a first outer ring which are rotationally connected. The second bearing comprises a second inner ring and a second outer ring which are rotationally connected. The elastic piece is accommodated in the assembling hole. When the first inner ring and the second inner ring are both fixed with the first component, the elastic piece is propped against between the first outer ring and the second component. Or when the first outer ring and the second outer ring are fixed with the second component, the elastic piece is abutted between the first inner ring and the first component. The elastic piece is used for reducing or eliminating bearing play of the first bearing and the second bearing so as to improve the camera shooting quality of the camera shooting module mounted on the second component.

Description

Rotating device and image pickup apparatus

Technical Field

The present application relates to the field of imaging technologies, and in particular, to a rotating device and an imaging apparatus.

Background

Some commonly used image capturing apparatuses include a rotating device and a camera module disposed on the rotating device. The rotating device comprises a stator, a rotor and a bearing. The stator is rotationally connected with the rotor through a bearing. The camera module is fixed on the rotor. The rotor can drive the camera module to rotate relative to the stator. The bearing comprises an inner ring and an outer ring which are rotationally connected. There is a clearance, i.e. bearing play, between the inner and outer rings. Due to the existence of the bearing play, the rotor can generate certain shaking when being subjected to external force. When the distance between the camera module and the object is long (for example, the distance is more than several hundred meters), the shake is amplified, and the camera quality of the camera equipment is affected.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a rotating device and an image pickup apparatus capable of reducing bearing play.

In a first aspect, the present application provides a rotating device including a first member, a second member, and a connecting assembly. And the second component is provided with an assembling hole. The first member passes through the fitting hole. The connecting assembly is connected between the second member and the first member, so that the second member is rotatably connected with the first member. The connecting component comprises a first bearing, a second bearing and an elastic piece. The first bearing is sleeved outside the first component and accommodated in the assembling hole. The first bearing comprises a first inner ring and a first outer ring, and the first outer ring is rotatably sleeved outside the first inner ring. The second bearing is sleeved outside the first component and is contained in the assembling hole. The second bearing is disposed in series with the first bearing in an axial direction of the first member. The second bearing comprises a second inner ring and a second outer ring. The second outer ring is rotatably sleeved outside the second inner ring. The elastic piece is accommodated in the assembling hole. When the first inner ring and the second inner ring are both fixed with the first member, the elastic piece is abutted between the first outer ring and the second member. Or when the first outer ring and the second outer ring are both fixed with the second component, the elastic piece is abutted between the first inner ring and the first component.

The second bearing and the first bearing are arranged in series along the axial direction of the first member, the second bearing and the first bearing are arranged along the axial direction of the first member, pressure borne by the first bearing can be transmitted to the second bearing through the first member, and pressure borne by the second bearing can be transmitted to the first bearing through the second member.

When the first inner ring and the second inner ring are both fixed with the first member, the elastic piece is abutted between the first outer ring and the second member. Or when the first outer ring and the second outer ring are both fixed with the second component, the elastic piece is abutted between the first inner ring and the first component. The elastic part is used for applying elastic pressure to the first bearing and the second bearing along the axial direction so as to reduce or eliminate the bearing play of the first bearing and the bearing play of the second bearing. When the camera module is installed on the rotating device, because the bearing play of the first bearing is reduced or eliminated, the bearing play of the second bearing is reduced or eliminated, when the camera module is rotated, the shaking of the camera module is reduced, the motion stability of the camera module is improved, and the camera quality of the camera equipment is improved.

Because the elastic component is an elastic (or flexible) structure, different elastic pressures can be obtained by designing the compression amount and/or the elastic coefficient, so that the axial stress of the first bearing and the second bearing is in a specification range, and the rotating service life of the first bearing and the second bearing is effectively ensured. In addition, the elastic piece has simple structure and manufacture, occupies small size space in the axial direction of the rotating device, and is beneficial to the miniaturization of the rotating device.

According to the first aspect, in a possible implementation manner, the first inner ring is fixed to the first member, the second member further includes a step arranged on the inner wall of the assembly hole, the step includes a first step surface and a second step surface which are arranged oppositely, the elastic member elastically abuts between the first step surface and the first outer ring, and the second outer ring is in contact with the second step surface.

Through set up the step on the inner wall of pilot hole, made things convenient for the elastomeric element to assemble on the second component, improved rotating device's equipment convenience.

According to the first aspect, in a possible implementation manner, the first member includes a main body and an assembly shaft that are fixedly connected along an axial direction of the first member, the assembly shaft penetrates through the assembly hole, the first bearing is sleeved on the assembly shaft, the second bearing is sleeved on the assembly shaft, the first inner ring is fixed to the assembly shaft, and the second inner ring is fixed to the assembly shaft. The main body is used for being fixedly connected with a mounting frame, and the rotating device is convenient to mount on other devices or equipment.

According to the first aspect, in a possible implementation manner, a shaft shoulder is arranged on the outer wall of the assembling shaft, one surface of the first inner ring, which is far away from the second bearing, abuts against the shaft shoulder to be fixed with the first member, and the shaft shoulder is used for limiting the first inner ring to move towards the main body direction along the axial direction of the first member, so that the improvement of the stability of the first bearing is facilitated.

According to the first aspect, in a possible implementation manner, the assembling shaft comprises a first assembling portion and a second assembling portion, the first assembling portion is connected between the main body and the second assembling portion, and the shaft diameter of the first assembling portion is larger than that of the second assembling portion so as to form the shaft shoulder. By providing different shaft diameters to form a stepped shoulder, the manufacture of the first member is facilitated.

According to the first aspect, in a possible implementation manner, the connecting assembly further comprises a pressing ring, the pressing ring is fixed to one end, away from the main body, of the assembling shaft, and the pressing ring abuts against the second inner ring, so that the second inner ring and the assembling shaft are fixed together. The pressure ring is used for providing rigid axial pressure for the second inner ring so as to reduce or eliminate bearing play of the second bearing and bearing play of the first bearing.

According to the first aspect, in a possible implementation manner, the second component further comprises an accommodating hole coaxial and communicated with the assembling hole, the pressing ring is accommodated in the accommodating hole, the pressing ring is convenient to assemble on the assembling shaft, and the assembling convenience of the rotating device is further improved.

According to the first aspect, in a possible implementation manner, the connecting assembly further comprises a fastener, the pressing ring comprises an installation portion and a bearing portion, the fastener is fixedly arranged in a penetrating mode on the installation portion and the assembling shaft, the bearing portion is connected with the periphery of the installation portion in a bending mode, and a pressure bearing face which is abutted to the second inner ring is arranged on the bearing portion. The press ring is detachably arranged on the assembly shaft through the fastener, so that the press ring is convenient to assemble and disassemble, and when the press ring and the second bearing are damaged, a new press ring and a new second bearing are convenient to replace.

According to the first aspect, in a possible implementation manner, the first outer ring is fixed to the second member, the second outer ring is fixed to the second member, the first member further includes a step arranged on an outer wall of the first member, the step includes a first step surface and a second step surface which are arranged oppositely, the elastic member elastically abuts between the first step surface and the first inner ring, and the second inner ring is in contact with the second step surface.

The step is arranged on the outer wall of the first component, so that the elastic component is assembled on the second component conveniently, and the assembly convenience of the rotating device is improved.

In a possible implementation form according to the first aspect, the elastic member is a wave spring. The wave spring has simple structure, and is beneficial to simplifying the structure and the assembly of the rotating device.

According to the first aspect, in a possible implementation manner, the first bearing further includes a first rolling member, the first rolling member is located between the first inner ring and the first outer ring, and the first inner ring is rotationally connected to the first outer ring through the first rolling member; the second bearing further comprises a second rolling element, the second rolling element is located between the second inner ring and the second outer ring, and the second inner ring is in rotating connection with the second outer ring through the second rolling element.

In a possible implementation form according to the first aspect, the first bearing and the second bearing are both deep groove ball bearings. The deep groove ball bearing has the characteristics of small friction resistance and high rotating speed, and is favorable for improving the stability of relative rotation of the first component and the second component.

Deep groove ball bearings can withstand large radial forces but not large axial pressures. The contact stress of the rolling elements (balls) with the inner and outer races of the bearing is very sensitive to the amount of axial interference, which in turn results in excessive contact stress of the rolling elements with the inner and outer races of the bearing having a large amount of partial interference. Beyond the service stress range of the bearing rolling element material, the rolling element is worn out and fails. For example, when an axial pressure is applied to the bearing by interference fit of a rigid member (e.g., a pressure ring) with the inner ring of the bearing, the magnitude of interference between the rigid member and the inner ring of the bearing is difficult to control. The interference is too large, which, although eliminating a certain bearing play, is liable to wear failure of the rolling elements. Alternatively, too little axial pressure does not serve as backlash. Due to the rigid design, the axial pressure applied by the phase bearing is uncontrollable, the stress deviation of a rolling piece and a slideway of the bearing is large, and further the deviation of the service life of the bearing, the rotation damping and the stability of the device is large.

In this application, take first inner circle the second inner circle all with first component is fixed mutually, and the elastic component supports and holds between first outer lane and second component as an example, because the elastic component elasticity supports and holds between first step face and first outer lane, because the axial pressure that the elastic component applyed for first inner circle is elastic pressure, has reduced the axial interference volume of axial pressure to rolling element and bearing inner and outer lane to the contact stress between first rolling element and the first inner circle, the contact stress between first rolling element and the first outer lane, the contact stress between second rolling element and the second inner circle, the contact stress between second rolling element and the second outer lane has been reduced.

Since the contact stress between the first rolling member and the first inner ring is reduced, it is advantageous to reduce the wear between the first rolling member and the first inner ring. Since the contact stress of the first rolling member and the first outer ring is reduced, it is advantageous to reduce the wear between the first rolling member and the first outer ring. Thus, the service life of the first bearing is prolonged.

Since the contact stress between the second rolling member and the second inner ring is reduced, it is advantageous to reduce the wear between the second rolling member and the second inner ring. Since the contact stress between the second rolling member and the second outer ring is reduced, it is advantageous to reduce the wear between the second rolling member and the second outer ring. Therefore, the service life of the second bearing is prolonged.

In a second aspect, the present application provides an image pickup apparatus comprising an image pickup module and the rotating device according to the first aspect, wherein the rotating device is mounted on the second member, and the second member is capable of rotating relative to the first member.

Because the bearing play of first bearing is reduced or eliminated, the bearing play of second bearing is reduced or eliminated, when the module of making a video recording is driven by the rotor and is rotated, has reduced the rocking of the module of making a video recording, has improved the motion stability of the module of making a video recording, and then has improved camera equipment's the quality of making a video recording.

Drawings

Fig. 1 is a schematic perspective assembly view of an image pickup apparatus according to an embodiment of the present application;

fig. 2 is a schematic perspective exploded view of an image pickup apparatus according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a rotating device provided in accordance with an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a perspective view of a wave spring;

FIG. 6a is a schematic plan view of a bearing with bearing play;

FIG. 6b is a schematic plan view of the first bearing;

fig. 7 is a partial cross-sectional view of a rotating device provided in an embodiment of the present application.

Detailed Description

Typically the stator is rotationally coupled to the rotor by a bearing, such as a deep groove ball bearing. The camera module is fixed on the rotor. A gap, i.e., bearing play, exists between the inner race and the outer race of the bearing. Because the existence of bearing play makes the module of making a video recording receive external force, can produce certain rocking. When the monitoring distance is long, the shaking is amplified, so that the image deviates from the preset position and shakes, and the user experience is influenced.

Based on the above, the application provides a rotating device and a related image pickup device. The rotating device comprises a first member, a second member and a connecting component. And the second component is provided with an assembling hole. The first member passes through the fitting hole. The connecting assembly is connected between the second member and the first member, so that the second member is rotatably connected with the first member. The connecting component comprises a first bearing, a second bearing and an elastic piece. The first bearing is sleeved outside the first component and accommodated in the assembling hole. The first bearing comprises a first inner ring and a first outer ring, and the first outer ring is rotationally sleeved outside the first inner ring. The second bearing is sleeved outside the first component and is contained in the assembling hole. The second bearing is disposed in series with the first bearing in an axial direction of the first member. The second bearing comprises a second inner ring and a second outer ring. The second outer ring is rotatably sleeved outside the second inner ring. The elastic piece is accommodated in the assembling hole. When the first inner ring and the second inner ring are fixed with the first member, the elastic piece is abutted between the first outer ring and the second member. Or when the first outer ring and the second outer ring are fixed with the second member, the elastic piece is abutted between the first inner ring and the first member.

Referring to fig. 1, 2 and 3, the image capturing apparatus 100 includes a rotating device 101 and an image capturing module 103 disposed on the rotating device 101. In this embodiment, the rotating device 101 may be a pan/tilt head, which is a supporting device for installing and fixing the camera module 103. The camera module 103 may be a mobile phone, a camera, a video camera (e.g., a dome camera), or the like.

The rotating device 101 includes a first member 20, a second member 40 and a connecting assembly 60. The second member 40 is rotatably coupled to the first member 20 by a coupling assembly 60. The camera module 103 is mounted on the second member 40 so as to be capable of rotating (e.g., rotating in a horizontal direction) relative to the first member 20 under the driving of the first member 20. In the present embodiment, the first member 20 is a stator, and the second member 40 is a rotor. The rotating device 101 further includes a driving member 80 and a transmission structure 90. The driving member 80 is connected to the second member 40 through the transmission structure 90, and the driving member 80 is used for driving the second member 40 to rotate relative to the first member 20, so as to drive the camera module 103 to rotate.

Referring to fig. 4, the first member 20 includes a main body 22 and a mounting shaft 24 fixedly connected along the axial direction of the first member 20. The body 22 may be fixed to a mounting rack, for example, the body 22 is fixed to a mounting rack of a light pole, or the body 22 is fixed to a mounting rack of an unmanned aerial vehicle, or the body 22 is fixed to a mounting rack on a ceiling, etc., which is not illustrated herein. The mounting shaft 24 is adapted for rotational connection with the second member 40. A shoulder 240 is provided on the outer wall of the mounting shaft 24 for abutting against the connecting member 60 to limit axial movement of the connecting member 60 along the mounting shaft 24. In the present embodiment, the mounting shaft 24 includes a first mounting portion 242 and a second mounting portion 244 which are connected to each other, and the first mounting portion 242 is fixedly connected between the main body 22 and the second mounting portion 244. The first fitting portion 242 has a larger shaft diameter than the second fitting portion 244, thereby forming a shoulder 240 on the fitting shaft 24.

In other embodiments of the present application, the main body 22 of the first member 20 may be omitted, the shaft diameters of the mounting shafts 24 may be uniform or non-uniform, and the shaft shoulder 240 may be a boss structure protruding from the mounting shaft 24.

The second member 40 includes a first end surface 42 and a second end surface 44 in the axial direction of the second member 40. The first end surface 42 is provided at an end of the second member 40 adjacent the body 22. The second member 40 is further provided with a fitting hole 46 and a receiving hole 47 which are provided along the axial direction of the second member 40 and communicate with each other. The mounting hole 46 penetrates the first end surface 42 and receives the mounting shaft 24 and a part of the connecting assembly 60. The receiving hole 47 penetrates the second end surface 44 to receive a part of the connecting assembly 60. The inner wall of the fitting hole 46 is protruded with a step 48. The step 48 includes a first step surface 482 and a second step surface 484 that are disposed opposite each other in the axial direction of the second member 40. The first step surface 482 and the second step surface 484 are used to abut against the connecting member 60. A first step surface 482 is provided at an end of the step 48 adjacent the main body 22.

The connecting assembly 60 includes a first bearing 63, a second bearing 64, a pressing ring 66, a fastening member 67, and an elastic member 68. The first bearing 63 and the second bearing 64 are sleeved outside the second assembling portion 244 and are received in the assembling hole 46, so that the first member 20 and the second member 40 are rotatably connected. The pressing ring 66 is fixed to an end of the second fitting portion 244 of the fitting shaft 24, which is away from the main body 22, by a fastener 67. The elastic element 68 elastically abuts between the first bearing 63 and the first step surface 482 to provide axial pressure to the first bearing 63.

The first bearing 63 includes a first inner race 632, a first rolling element 634, and a first outer race 636. The first inner race 632 is disposed outside the second mounting portion 244 and abuts against the shoulder 240. The first outer ring 636 is sleeved outside the first inner ring 632. The first inner race 632 is rotatably coupled to the first outer race 636 by first rollers 634. In this embodiment, the first bearing 63 is a deep groove ball bearing, the first rolling elements 634 are balls, and the first rolling elements 634 are located between the first inner ring 632 and the first outer ring 636. Wherein, the inner wall of the first inner ring 632 departing from the first outer ring 636 is attached to the second assembling portion 244. The end surface of the first inner race 632 facing away from the second bearing 64 abuts against the shoulder 240, so that the first inner race 632 is fixed to the first member 20. The shoulder 240 abuts against the first inner race 632, which contributes to restricting the degree of freedom of the first inner race 632 of the first bearing 63 in the direction of the main body 22. The first outer ring 636 is used for abutting against the elastic member 68. A gap 201 is formed between the first outer ring 636 and the first step surface 482. In another embodiment of the present application, the first bearing 63 is not limited to a deep groove ball bearing, and for example, the first bearing 63 may be a needle bearing or the like, and the first inner race 632 may rotate relative to the first outer race 636.

The second bearing 64 includes a second inner race 642, a second roller 644, and a second outer race 646. The second inner ring 642 is fitted over the second fitting portion 244 and abuts against the press ring 66. The second outer ring 646 is sleeved outside the second inner ring 642. The second inner race 642 is rotatably connected to the second outer race 646 by a second roller 644. The second outer race 646 is fixed to the inner wall of the fitting hole 46. In this embodiment, the second bearing 64 is a deep groove ball bearing, the second rolling elements 644 are balls, and the second rolling elements 644 are located between the second inner race 642 and the second outer race 646. Wherein, the inner wall of the second inner ring 642 departing from the second outer ring 646 is attached to the outer wall of the second assembling portion 244. An end surface of the second inner ring 642 facing away from the first bearing 63 abuts against the press ring 66, and the second inner ring 642 is fixed to the first member 20. The second outer race 646 abuts the second step surface 484 to fix the second outer race 646 to the inner wall of the fitting hole 46. In other embodiments of the present application, the second bearing 64 is not limited to a deep groove ball bearing, for example, the second bearing 64 may be a needle bearing, and the second inner ring 642 may rotate relative to the second outer ring 646.

The pressing ring 66 includes a mounting portion 663 and a pressing portion 665. The fastener 67 is fixedly inserted through the mounting portion 663 and the second mounting portion 244, so that the mounting portion 663 is fixedly connected with the second mounting portion 244. The pressing portion 665 is bent and connected to the peripheral edge of the mounting portion 663 and extends toward the main body 22. The pressure receiving portion 665 is provided around the circumferential direction of the second fitting portion 244. One side of the pressure bearing portion 665 departing from the mounting portion 663 is provided with a pressure bearing surface 6651. Pressure bearing face 6651 abuts second inner race 642 to apply axial pressure to second bearing 64.

In the embodiment of the present application, the pressure ring 66 applies a rigid axial pressure to the first bearing 63 and the second bearing 64 due to the force transmission action of the mounting shaft 24. By so doing, it is advantageous to reduce the bearing play between the first inner ring 632 and the first outer ring 636, reduce the bearing play between the second inner ring 642 and the second outer ring 646, reduce the possibility that the image pickup apparatus 100 shakes when receiving an external force, improve the stability of the image pickup module 103 in picking up an image, and thus improve the image pickup quality of the image pickup apparatus 100.

The elastic element 68 is accommodated in the assembly hole 46, and the elastic element 68 elastically abuts between the first step surface 482 and the first outer ring 636. I.e. the elastic member 68 is received in the slit 201. The elastic member 68 applies an axial elastic pressure to the first outer ring 636, which is beneficial to reducing a bearing play between the first inner ring 632 and the first outer ring 636, reducing a bearing play between the second inner ring 642 and the second outer ring 646, reducing the possibility of shaking of the image capturing apparatus 100 when receiving an external force, and improving the stability of the image capturing module 103 for capturing an image, thereby improving the image capturing quality of the image capturing apparatus 100.

The original height of the elastic member 68 in the axial direction of the first member 20 is larger than the distance between the first outer ring 636 and the first step surface 482 (i.e., the axial height of the slit 201 in the first member 20).

In the present embodiment, as shown in fig. 5, the elastic member 68 is a wave spring. The distance between the first outer ring 636 and the first step surface 482, the thickness of the elastic member 68, and the height of the elastic member 68 can be adjusted to adjust the magnitude of the axial pressure applied to the first bearing 63 and the second bearing 64, wherein the axial pressure is generally smaller than the maximum axial force required by the service life of the first bearing 63 and the second bearing 64, so as to obtain a longer service life.

It is understood that in other embodiments of the present application, the elastic member 68 may be other elastic structures or flexible structures with elastic properties, such as a spring, etc.

In a conventional arrangement, as shown in fig. 6a, the inner race 632a and the outer race 636a of the bearing 63a are rotationally connected by balls 634a, and there is typically a bearing play 601a between the inner race 632a and the outer race 636 a. Due to the presence of the bearing clearance 601a, when an external force is applied, the inner ring 632a and the outer ring 636a move relatively, and a certain play is generated.

Deep groove ball bearings can withstand large radial forces but not large axial pressures. The contact stress of the rolling elements (balls) with the inner and outer races of the bearing is very sensitive to the amount of axial interference, which in turn results in excessive contact stress of the rolling elements with the inner and outer races of the bearing having a large amount of partial interference. When the service stress range of the bearing rolling element material is exceeded, the rolling elements are worn and failed. For example, when an axial pressure is applied to the bearing by interference fit of a rigid member (e.g., a pressure ring) with the inner ring of the bearing, the magnitude of interference between the rigid member and the inner ring of the bearing is difficult to control. The interference is too large, which, although eliminating a certain bearing play, is liable to wear failure of the rolling elements. Alternatively, too little axial pressure does not serve as backlash. Due to the rigid design, the axial pressure applied by the phase bearing is uncontrollable, the stress deviation of a rolling piece and a slideway of the bearing is large, and the deviation of the service life of the bearing, the rotation damping and the stability of the device is large.

In the present application, since the elastic element 68 elastically abuts between the first step surface 482 and the first outer ring 636, the axial pressure applied to the first bearing 63 and the second bearing 64 by the elastic element 68 reduces the bearing play existing between the first inner ring 632 and the first outer ring 636 and the bearing play existing between the second inner ring 642 and the second outer ring 646. As shown in fig. 6b, due to the elastic pressure of the elastic member 68 against the first inner ring 632, the bearing play existing between the first inner ring 632 and the first outer ring 636 is eliminated.

In addition, since the axial pressing force applied to the first inner ring 632 by the elastic member 68 is an elastic pressing force, the amount of axial interference of the axial pressing force on the rolling members and the bearing inner and outer rings is reduced, thereby reducing the contact stress between the first rolling members 634 and the first inner ring 632, the contact stress between the first rolling members 634 and the first outer ring 636, the contact stress between the second rolling members 644 and the second inner ring 642, and the contact stress between the second rolling members 644 and the second outer ring 646.

Since the contact stress of the first rolling elements 634 and the first inner race 632 is reduced, it is advantageous to reduce the wear between the first rolling elements 634 and the first inner race 632. Since the contact stress of first roller 634 and first outer ring 636 is reduced, it is advantageous to reduce wear between first roller 634 and first outer ring 636. Thus, the service life of the first bearing 63 is advantageously prolonged.

Since the contact stress of the second roller 644 with the second inner ring 642 is reduced, it is advantageous to reduce the wear between the second roller 644 and the second inner ring 642. Since the contact stress of the second rolling elements 644 and the second outer race 646 is reduced, it is advantageous to reduce the wear between the second rolling elements 644 and the second outer race 646. In this manner, the service life of second bearing 64 is advantageously extended.

In the rotating device 101 provided by the present application, the connecting assembly 60 includes the elastic member 68, and can control the axial stress of the first bearing 63 and the second bearing 64 while reliably eliminating the bearing play, so that the axial stress of the actual first bearing 63 and the actual second bearing 64 is within the specification range of the respective axial stress, and the rotating life of the first bearing 63 and the second bearing 64 is effectively prolonged.

This application has avoided coming the axial compression bearing through the rigidity interference to lead to pressure uncontrollable, but controls axial pressure with a flexible construction and accessible design compression capacity and elastic coefficient, and the flexible construction that this application used makes simply, low cost, and the axial dimensions space occupies fewly.

In other embodiments of the present application, the rotating device 101 is not limited to be used for carrying the camera module 103, and the rotating device 101 may be applied to other scenes that may require the rotating device 101. The first member 20 is not limited to a stator, and the second member 40 is not limited to a rotor.

In another embodiment of the present application, the press ring 66 may be omitted and the second inner ring 642 may be directly fixed to the first member 20. In other embodiments of the present application, the shoulder 240 may be omitted and the first inner race 632 may be directly fixed to the first member 20.

In one embodiment, as shown in fig. 7, the first inner race 632b is rotationally coupled to the first outer race 636b via first rollers 634b, and the second inner race 642b is rotationally coupled to the second outer race 646b via second rollers 644 b. The first outer ring 636b is fixed with the second member 40b, the second outer ring 646b is fixed with the second member 40b, the first member 20b further includes a step 28 disposed on an outer wall of the first member 20b, and the step 28 includes a first step surface 282 and a second step surface 284 which are disposed opposite to each other. The elastic element 68b elastically abuts between the first step surface 282 and the first inner ring 632b, and the second inner ring 642b contacts with the second step surface 284. The pressing ring 66b is fixed with the second component 40b by the fastener 67b, and the second outer ring 646b is abutted against the pressing ring 66 b.

Directional phrases used in this application, such as, for example, "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side wall," and the like, refer only to the orientation of the appended drawings and are therefore used in order to better and more clearly illustrate and understand the present application and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation and is therefore not to be considered limiting of the present application.

Moreover, the ordinal numbers used herein for the components, such as "first," "second," etc., are used merely to distinguish between the objects described, and do not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (14)

1. A rotary device, comprising:

a first member;

a second member provided with a fitting hole through which the first member passes;

a coupling assembly coupled between the second member and the first member to rotatably couple the second member to the first member, the coupling assembly comprising:

the first bearing is sleeved outside the first component and accommodated in the assembling hole, the first bearing comprises a first inner ring and a first outer ring, and the first outer ring is rotatably sleeved outside the first inner ring;

the second bearing is sleeved outside the first component and is contained in the assembling hole, the second bearing and the first bearing are arranged in series along the axial direction of the first component, the second bearing comprises a second inner ring and a second outer ring, and the second outer ring is rotatably sleeved outside the second inner ring;

the elastic piece is accommodated in the assembly hole and is abutted between the first outer ring and the second member when the first inner ring and the second inner ring are both fixed with the first member,

or when the first outer ring and the second outer ring are both fixed with the second component, the elastic piece is abutted between the first inner ring and the first component.

2. The rotating device according to claim 1, wherein the first inner ring is fixed to the first member, the second member further includes a step provided on an inner wall of the fitting hole, the step includes a first step surface and a second step surface which are opposite to each other, the elastic member elastically abuts between the first step surface and the first outer ring, and the second outer ring is in contact with the second step surface.

3. The rotating device according to claim 2, wherein the first member includes a main body and an assembling shaft fixedly connected to each other along an axial direction of the first member, the assembling shaft is inserted into the assembling hole, the first bearing is sleeved on the assembling shaft, the second bearing is sleeved on the assembling shaft, the first inner ring is fixed to the assembling shaft, and the second inner ring is fixed to the assembling shaft.

4. The rotating device as claimed in claim 3, wherein a shoulder is provided on an outer wall of the assembling shaft, and a surface of the first inner ring facing away from the second bearing abuts against the shoulder.

5. The rotating apparatus according to claim 4, wherein the fitting shaft includes a first fitting portion and a second fitting portion, the first fitting portion being connected between the main body and the second fitting portion, and a shaft diameter of the first fitting portion being larger than a shaft diameter of the second fitting portion to form the shoulder.

6. The rotating device according to claim 3, wherein the connecting assembly further comprises a pressing ring, the pressing ring is fixed to an end of the assembling shaft, which is away from the main body, and the pressing ring abuts against the second inner ring, so that the second inner ring and the assembling shaft are fixed together.

7. The rotating device according to claim 6, wherein the second member further comprises a receiving hole coaxial with and communicating with the fitting hole, and the pressing ring is received in the receiving hole.

8. The rotating device according to claim 6, wherein the connecting assembly further comprises a fastener, the pressing ring comprises an installation portion and a pressing portion, the fastener is fixedly arranged on the installation portion and the assembling shaft in a penetrating mode, the pressing portion is connected with the periphery of the installation portion in a bending mode, and a pressing surface which is abutted to the second inner ring is arranged on the pressing portion.

9. The rotating device according to claim 1, wherein the first outer ring is fixed to the second member, the second outer ring is fixed to the second member, the first member further includes a step provided on an outer wall of the first member, the step includes a first step surface and a second step surface which are opposite to each other, the elastic member elastically abuts between the first step surface and the first inner ring, and the second inner ring is in contact with the second step surface.

10. The rotary device as claimed in any one of claims 1 to 9, wherein the elastic member is a wave spring.

11. The rotating device according to any one of claims 1 to 9, wherein the first bearing further comprises first rolling members located between the first inner ring and the first outer ring, the first inner ring being rotationally connected to the first outer ring via the first rolling members; the second bearing further comprises a second rolling element, the second rolling element is located between the second inner ring and the second outer ring, and the second inner ring is in rotating connection with the second outer ring through the second rolling element.

12. The rotary device of claim 11 wherein the first and second bearings are deep groove ball bearings.

13. The rotation device according to any one of claims 1 to 9, further comprising a drive member connected to the second member, the drive member being adapted to drive the second member in rotation relative to the first member.

14. An image pickup apparatus comprising an image pickup module and a rotating device according to any one of claims 1 to 13, said rotating device being mounted on said second member, said second member being rotatable relative to said first member.

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