CN220523054U - Rotating shaft mechanism and projection equipment - Google Patents

Abstract

The application provides a pivot mechanism and projection equipment relates to and rotates and connect technical field. The rotating shaft mechanism can reduce the risk of skidding of the driving piece and can improve the capacity of the driving piece to drive a load. The rotating shaft mechanism comprises: the device comprises a rotating shaft, a first connecting piece, a second connecting piece and a driving assembly, wherein the first connecting piece and the second connecting piece are sleeved on the rotating shaft, and the driving assembly is arranged on the second connecting piece and is in transmission connection with the rotating shaft; the rotating shaft can be driven to rotate under the driving of the driving component. The rotating shaft mechanism is used for rotationally connecting two structural members.

Description

Rotating shaft mechanism and projection equipment

Technical Field

The application relates to the technical field of rotational connection, in particular to a rotating shaft mechanism and projection equipment.

Background

More and more intelligent projection devices are beginning to evolve towards having varied projection angles. The fixed angle projection of conventional projection devices has not been advantageous.

The projection device can realize the projection of the whole house without dead angles through pitching and rotation, and in the two movements, a rotating structure is needed. In the related art, there is a manual rotation shaft to realize adjustment of a projection angle of a projection apparatus by manual adjustment of a user. There are also automatic spindles used to effect adjustment of the projection angle of the projection device by means of an electric drive. There are also spindle structures that can be adjusted either manually or automatically.

However, in the manual-automatic rotating shaft structure in the related art, the torque of the rotating shaft which needs to be overcome by the driving member is as large as the torque which enables the driving member to slip in the automatic rotating process, so that if the driving member is required not to slip in the driving process, the torque of the rotating shaft needs to be set as large as possible, but in this way, the torque of the rotating shaft which needs to be overcome by the driving member is also increased, and the capability of the driving member to drive an additional load is reduced.

Disclosure of Invention

The application provides a pivot mechanism and projection equipment can reduce the driving piece and produce the risk of skidding to can improve the ability that the driving piece drove the load.

In one aspect, the present application provides a spindle mechanism comprising: the device comprises a rotating shaft, a first connecting piece, a second connecting piece and a driving assembly, wherein the first connecting piece is used for being connected with a first structural piece and is rotatably sleeved at one end of the rotating shaft; the second connecting piece is used for being connected with the second structural piece and is rotatably sleeved at the other end of the rotating shaft; the driving component is arranged on the second connecting piece and is in transmission connection with the rotating shaft; the rotating shaft can rotate relative to the first connecting piece or the second connecting piece under the driving of the driving component.

The rotating shaft mechanism is provided with the rotating shaft, so that parts in the rotating shaft mechanism can be arranged on the rotating shaft, and the rotating shaft is used for bearing required parts; a first connecting piece is sleeved at one end of the rotating shaft, the first connecting piece can rotate relative to the rotating shaft, a connecting point position can be provided through the first connecting piece, and the first connecting piece is connected with a first structural part in the equipment or the device; the other end of the rotating shaft is sleeved with a second connecting piece, the second connecting piece can also rotate relative to the rotating shaft, other connecting points can be provided through the second connecting piece, and the second connecting piece is connected with a second structural member in the equipment or the device, so that the first structural member and the second structural member can respectively rotate relative to the rotating shaft, the first structural member can rotate relative to the second structural member, and the first structural member and the second structural member can rotate relative to each other manually; and the second connecting piece is provided with a driving component, and the driving component is in transmission connection with the rotating shaft, so that the rotating shaft and the second connecting piece can rotate relatively under the driving of the driving component.

Simultaneously, the pivot mechanism that this application provided owing to be provided with first connecting piece and second connecting piece, can be with first structure in equipment or the device and second structure respectively with first connecting piece and second connecting piece fixed connection, and need not with first structure and second structure and pivot fixed connection. Therefore, the friction force between the first connecting piece and the rotating shaft and the friction force between the second connecting piece and the rotating shaft can be respectively adjusted, so that the torsion force between the first connecting piece and the rotating shaft and the torsion force between the second connecting piece and the rotating shaft can be matched with the load borne on the rotating shaft. The torque between the first connecting piece or the second connecting piece and the rotating shaft is smaller than the load, and the rotating shaft only rotates relative to the first connecting piece and the second connecting piece under the driving of the driving piece, so that the driving piece slips, and the second connecting piece cannot rotate relative to the first connecting piece. And, only need make the torsion size between first connecting piece and second connecting piece and the pivot all with bear the weight of epaxial load size phase-match can, and need not to increase the torsion size between second connecting piece and the pivot to reduce the risk that the driving piece took place to skid, thereby can make the driving piece rotate at the certain circumstances of output, can drive more loads. Therefore, the rotating shaft mechanism provided by the application can reduce the risk of skidding of the driving piece and can improve the capacity of the driving piece to drive a load.

In one possible implementation manner of the present application, the rotating shaft is provided with a separation part, and the separation part is formed by extending along the radial direction of the rotating shaft; the first connecting piece and the second connecting piece are respectively positioned at two sides of the isolation part along the axial direction of the rotating shaft.

In one possible implementation of the present application, the spindle mechanism further includes a first elastic component and a second elastic component; the first elastic component is arranged on one side of the isolation part in the axial direction of the rotating shaft and is abutted against the first connecting piece, so that the first connecting piece is pressed against the isolation part; the second elastic component is arranged on the other side of the isolation part and is abutted against the second connecting piece, and the second connecting piece is pressed against the isolation part.

In one possible implementation of the present application, the rotation shaft mechanism further includes a first fastener, and in an axial direction along the rotation shaft, the first fastener is disposed on a side of the first connecting member away from the isolation portion, and by adjusting a position of the first fastener on the rotation shaft, a pressing force of the first elastic component applied on the first connecting member can be adjusted.

In one possible implementation of the present application, the rotation shaft mechanism further includes a first friction member provided on at least one side of the first elastic member in an axial direction along the rotation shaft.

In one possible implementation of the present application, the rotation shaft mechanism further includes a second fastener, and the second fastener is disposed on a side of the second connecting member away from the isolation portion in an axial direction along the rotation shaft, and by adjusting a position of the second fastener on the rotation shaft, a pressing force applied on the second connecting member by the second elastic component can be adjusted.

In one possible implementation of the present application, the rotation shaft mechanism further includes a second friction member provided on at least one side of the second elastic member in an axial direction along the rotation shaft.

In one possible implementation of the present application, the second connector includes a fixedly connected connection plate and a connection bracket, the connection plate and the connection bracket enclosing to form a mounting cavity, at least a portion of the drive assembly being located within the mounting cavity.

In one possible implementation of the present application, the driving assembly includes a driving member, a first driving member and a second driving member, the driving member is fixed on the connection bracket, the first driving member is fixed on the rotating shaft, the second driving member is fixed on the output shaft of the driving member, and the first driving member and the second driving member are located in the installation cavity, and the first driving member is in transmission connection with the second driving member.

In another aspect, the present application provides a projection device comprising: the rotating shaft mechanism comprises a base, a projection host and any one of the rotating shaft mechanisms, wherein the base is fixedly connected with the first connecting piece, the projection host is fixedly connected with the second connecting piece, and the projection host is used for generating a projection picture.

Drawings

FIG. 1 is an exploded view of a spindle mechanism provided herein;

FIG. 2 is an assembly view of the spindle mechanism provided herein;

FIG. 3 is a cross-sectional view of the spindle mechanism provided herein;

fig. 4 is a schematic structural diagram of a first connecting member in the spindle mechanism provided in the present application;

fig. 5 is a schematic structural diagram of a rotating shaft and a first transmission member in the rotating shaft mechanism provided by the application.

Reference numerals illustrate:

1-a rotating shaft; 11-a spindle body; 111-positioning surface; 12-isolation part; 2-a first connector; 21-a connector body; 22-connecting through holes; 23-fixing holes; 3-a second connector; 31-connecting plates; 32-connecting a bracket; 4-a drive assembly; 41-a driving member; 42-a first transmission member; 43-a second transmission member; 44-a third transmission member; 5-a first elastic component; 51-a first disc spring; 52-a second disc spring; 6-a first fastener; 7-a first friction member; 8-a second elastic component; 81-a third disc spring; 82-fourth disc spring; 9-a second fastener; 10-a second friction member.

Detailed Description

For the purposes, technical solutions and advantages of the embodiments of the present application to be more apparent, the specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are illustrative of the present application, but are not intended to limit the scope of the present application.

In the present embodiments, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

Furthermore, in the embodiments of the present application, the terms "upper," "lower," "left," and "right," etc., are defined with respect to the orientation in which the components in the drawings are schematically disposed, and it should be understood that these directional terms are relative terms, which are used for descriptive and clarity with respect to each other, and which may vary accordingly with respect to the orientation in which the components in the drawings are disposed.

In the embodiments herein, unless explicitly specified and limited otherwise, the term "connected" is to be construed broadly, and for example, "connected" may be either a fixed connection, a removable connection, or an integral body; can be directly connected or indirectly connected through an intermediate medium.

In the present embodiments, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Projection devices are increasingly being used, and user requirements for projection devices are also increasing. Users often wish to adjust the projection angle of the projection device after the projection device is mounted in a fixed position, either manually or automatically, to meet the user's viewing needs at different angles.

The embodiment of the application provides a rotating shaft mechanism which can be applied to projection equipment to realize manual adjustment of the projection angle of the projection equipment or automatic adjustment of the projection angle of the projection equipment. The rotating shaft mechanism can reduce the risk of skidding of the driving piece in the process of automatically adjusting the projection angle of the projection equipment, can drive larger load, and can manually adjust the projection angle of the projection equipment with smaller external force. Of course, the rotation shaft mechanism can be applied to not only projection equipment but also other equipment, such as cameras, computers, displays and the like. The above-mentioned rotating shaft mechanism can be applied to a projection device, and is only an example for convenience of description, and the application scenario of the rotating shaft mechanism is not limited in this embodiment, and the rotating shaft mechanism can be applied to any device or apparatus that needs to implement rotation adjustment.

Referring to fig. 1, 2 and 3, fig. 1 is an exploded view of a spindle mechanism provided in the present application, fig. 2 is an assembled view of a spindle mechanism provided in the present application, and fig. 3 is a sectional view of a spindle mechanism provided in the present application. The pivot mechanism that this application embodiment provided includes: the device comprises a rotating shaft 1, a first connecting piece 2, a second connecting piece 3 and a driving assembly 4, wherein the first connecting piece 2 is used for being connected with a first structural member, and the first connecting piece 2 is rotatably sleeved at one end of the rotating shaft 1; the second connecting piece 3 is used for being connected with a second structural member, and the second connecting piece 3 is rotatably sleeved at the other end of the rotating shaft 1; the driving component 4 is arranged on the second connecting piece 3 and is rotationally connected with the rotating shaft 1; the driving assembly 4 drives the rotating shaft 1 to rotate relative to the first connecting piece 2 or the second connecting piece 3.

The rotating shaft 1 in the embodiment of the application can be set into a cylindrical rotating shaft 1, and the rotating shaft 1 is used for bearing parts in a rotating shaft mechanism. The rotating shaft 1 is also a two-part structural member for connecting equipment or a device needing to generate relative rotation, and after the two-part structural member is connected with the rotating shaft 1 through a first connecting piece 2 and a second connecting piece 3 which are arranged on the rotating shaft 1, the two-part structural member can generate relative rotation through the rotating shaft 1. In order to facilitate connection and fixation of the parts arranged on the rotating shaft 1, two mutually parallel positioning surfaces can be arranged on the rotating shaft body 11 of the rotating shaft 1 along the axial direction of the rotating shaft 1, namely, the circumferential side surface of the rotating shaft 1 comprises an arc surface and a positioning surface which are mutually spaced; correspondingly, the hole of the part sleeved on the rotating shaft 1 can be arranged to be matched with the circumferential side surface of the rotating shaft 1, namely, two mutually-plane wall surfaces are arranged on the hole wall of the part so as to be matched with the two mutually-plane positioning surfaces on the rotating shaft 1. This allows the part to rotate with the rotation of the shaft 1. The shaft 1 may be made of metal or plastic material, for example, aluminum alloy, steel or polyphenylene sulfide (Polyphenylene Sulfide, PPS) or the like.

The first connecting member 2 in the embodiment of the present application is used for connecting with a first structural member in an apparatus or device that needs to generate relative rotation, for example, a base or a bracket that plays a supporting role in the apparatus or device may be fixedly connected with the first connecting member 2. A through hole may be provided in the first connecting member 2 to allow the first connecting member 2 to be sleeved at one end of the rotating shaft 1.

Referring to fig. 4, fig. 4 is a schematic structural view of the first connector 2 in the spindle mechanism provided in the present application. The first connecting piece 2 can be set to be in a disc-shaped structural form, the connecting piece body 21 of the first connecting piece 2 is provided with the connecting through hole 22, the connecting through hole 22 can be set to be a circular through hole, the aperture of the circular through hole is larger than the diameter of the rotating shaft body 11 of the rotating shaft 1, the first connecting piece 2 is sleeved on the rotating shaft 1, and the first connecting piece 2 can rotate relative to the rotating shaft 1. In order to facilitate the connection of the first connecting member 2 with the first structural member, at least two fixing holes 23 may be provided on the first connecting member 2, for example, three fixing holes 23 may be uniformly provided on the connecting member body 21 of the first connecting member 2 in the circumferential direction of the first connecting member 2. Fasteners may be used to pass through the securing holes 23 to connect with the first structural member.

The second connecting member 3 in the embodiment of the present application is used for connecting with a second structural member in the apparatus or device, for example, a structural member of a rotating portion in the apparatus or device that needs to generate relative rotation may be fixedly connected with the second connecting member 3. A through hole may be provided in the second connecting member 3 to allow the second connecting member 3 to be sleeved at the other end of the rotating shaft 1.

The driving assembly 4 in the embodiment of the present application may be in a structural form including an electrically driven driving member 41, connecting the driving member 41 with the rotating shaft 1 through a transmission member, and disposing the driving member 41 on the second connecting member 3. The driving of the driving element 41 may rotate the rotating shaft 1 relative to the second connecting element 3, or may rotate the rotating shaft 1 relative to the first connecting element 2, so as to generate relative rotation between the first structural member and the second structural member connected to the first connecting element 2 and the second connecting element 3, respectively.

According to the rotating shaft mechanism provided by the embodiment of the application, due to the arrangement of the rotating shaft 1, parts in the rotating shaft mechanism can be arranged on the rotating shaft 1, and required parts are borne through the rotating shaft 1; a first connecting piece 2 is sleeved at one end of the rotating shaft 1, the first connecting piece 2 can rotate relative to the rotating shaft 1, a connecting point position can be provided through the first connecting piece 2, and the first connecting piece 2 is connected with a first structural part in equipment or a device; the other end of the rotating shaft 1 is sleeved with a second connecting piece 3, the second connecting piece 3 can also rotate relative to the rotating shaft 1, other connecting points can be provided through the second connecting piece 3, the second connecting piece 3 is connected with a second structural piece in equipment or a device, so that the first structural piece and the second structural piece can respectively rotate relative to the rotating shaft 1, the first structural piece can rotate relative to the second structural piece, and the first structural piece and the second structural piece can rotate relative to each other manually; and the driving component 4 is arranged on the second connecting piece 3, and the driving component 4 is in transmission connection with the rotating shaft 1, so that the rotating shaft 1 and the second connecting piece 3 can generate relative rotation under the driving of the driving component 4.

Meanwhile, the rotating shaft mechanism provided by the embodiment of the application can be provided with the first connecting piece 2 and the second connecting piece 3, so that the first structural piece and the second structural piece in the equipment or the device can be fixedly connected with the first connecting piece 2 and the second connecting piece 3 respectively, and the first structural piece and the second structural piece are not required to be fixedly connected with the rotating shaft 1. In this way, the magnitudes of the frictional forces between the first and second connection members 2 and 3 and the rotating shaft 1 can be adjusted, respectively, so that the magnitudes of the torsion forces between the first and second connection members 2 and 3 and the rotating shaft 1 can be matched with the magnitudes of the loads carried on the rotating shaft 1. The torque between the first connecting piece 2 or the second connecting piece 3 and the rotating shaft 1 is smaller than the load, and the rotating shaft 1 only rotates relative to the first connecting piece 2 and the second connecting piece 3 under the driving of the driving piece 41, so that the driving piece 41 slips, and the second connecting piece 3 cannot rotate relative to the first connecting piece 2. Moreover, the torque force between the first connecting piece 2 and the second connecting piece 3 and the rotating shaft 1 is only required to be matched with the load borne on the rotating shaft 1, and the torque force between the second connecting piece 3 and the rotating shaft 1 is not required to be increased, so that the risk of slipping of the driving piece 41 is reduced, and the driving piece 41 can drive more loads to rotate under the condition of certain output power. Therefore, the rotating shaft mechanism provided by the embodiment of the application can reduce the risk of skidding of the driving piece 41 and can improve the capacity of the driving piece 41 to drive a load.

In some possible implementations, the rotating shaft 1 is provided with a spacer 12, and the spacer 12 is formed to extend in a radial direction of the rotating shaft 1, and the first connecting member 2 and the second connecting member 3 are respectively located at two sides of the spacer 12 in an axial direction of the rotating shaft 1.

As shown in fig. 1, 2 and 3, for example, a partition 12 may be provided on the shaft body 11 of the shaft 1, that is, the partition 12 may be formed to extend from a circumferential side of the cylindrical shaft body 11 in a radial direction of the shaft 1, the partition 12 being located at an intermediate position of the shaft body 11 to divide the shaft body 11 into two parts. The spacer 12 may be provided in the form of a convex ring surrounding the rotation shaft body 11 in a circumferential direction, or may be provided in the form of two, three, or four equal numbers of bosses distributed along the circumferential direction of the rotation shaft body 11. The specific structural form of the partition 12 is not limited in the embodiment of the present application.

In this embodiment, by providing the partition 12, the first and second connection members 2 and 3 respectively fitted over the rotation shaft 1 can be isolated, so that the first and second connection members 2 and 3 are separated to be located at both sides of the partition 12 without contact. Thereby the torque between the first connecting piece 2 and the second connecting piece 3 and the rotating shaft 1 can be respectively adjusted, so that the torque between the first connecting piece 2 and the second connecting piece 3 and the rotating shaft 1 respectively meets the requirement.

In other possible ways, the torsion between the first and second connection members 2, 3 and the rotation shaft 1 is adjusted in order to facilitate. As shown in fig. 1, 2 and 3, a first elastic member 5 and a second elastic member 8 may be provided in the spindle mechanism. Wherein, in the axial direction along the rotating shaft 1, the first elastic component 5 is arranged at one side of the isolation part 12 and is abutted against the first connecting piece 2, and the first elastic component 5 is used for pressing the first connecting piece 2 against the isolation part 12; the second elastic component 8 is arranged on the other side of the isolation part 12 and abuts against the second connecting piece 3, and the second elastic component 8 is used for pressing the second connecting piece 3 against the isolation part 12.

In this embodiment, the first elastic component 5 and the second elastic component 8 may each use an elastic member such as a disc spring, a compression spring or a spring pad. The elastic piece is arranged on the rotating shaft 1, and the compression amount of the elastic piece can be adjusted to adjust the compression force respectively applied to the first connecting piece 2 and the second connecting piece 3. Thereby, in the axial direction along the rotating shaft 1, the pressing forces between the first connecting piece 2 and the second connecting piece 3 and the isolating part 12 can be respectively adjusted to adjust the magnitude of the friction force between the first connecting piece 2 and the second connecting piece 3 and the rotating shaft 1, and the magnitude of the torsion force between the first connecting piece 2 and the second connecting piece 3 and the rotating shaft 1 can be respectively adjusted.

As shown in fig. 3, the first elastic member 5 may be provided in a structure including a first disc spring 51 and a second disc spring 52, for example. The first connecting piece 2 can be abutted against one side of the isolation part 12, and the first disc spring 51 and the second disc spring 52 can be overlapped and sleeved on the rotating shaft 1, so that the first disc spring 51 and the second disc spring 52 are positioned on one side of the first connecting piece 2 far away from the isolation part 12. The magnitude of the frictional force between the first coupling member 2 and the partition 12 can be adjusted by adjusting the compression amounts of the first disc spring 51 and the second disc spring 52.

As another example, as shown in fig. 3, the second elastic member 8 may be provided in a structure including a third disc spring 81 and a fourth disc spring 82. The second connecting piece 3 can be sleeved on one end of the rotating shaft 1 far away from the first connecting piece 2, and the second connecting piece 3 is abutted against the other side of the isolation part 12. The third disc spring 81 and the fourth disc spring 82 may be stacked and sleeved on the rotating shaft 1, so that the third disc spring 81 and the fourth disc spring 82 are located on the side of the second connecting member 3 away from the isolation portion 12. The magnitude of the frictional force between the second coupling member 3 and the spacer 12 can be adjusted by adjusting the compression amounts of the third disc spring 81 and the fourth disc spring 82.

In still other implementations, as shown in fig. 1 and 3, the spindle mechanism further includes a first fastener 6. The first fastening member 6 is provided on a side of the first connecting member 2 away from the spacer 12 in the axial direction of the rotating shaft 1, and by adjusting the position of the first fastening member 6 on the rotating shaft 1, the pressing force of the first elastic member 5 on the first connecting member 2 can be adjusted.

For example, an external thread may be provided at an end of the rotation shaft 1 where the first connection member 2 is provided, and the first fastening member 6 may employ a first nut adapted to the external thread. In this way, the first nut can be screwed to adjust the position of the first nut on the rotating shaft 1, and thus the compression amounts of the first disc spring 51 and the second disc spring 52 can be adjusted, so that the magnitude of the friction force between the first connecting member 2 and the isolating portion 12 can be adjusted.

In still other realizations, as shown in fig. 1 and 3, the spindle mechanism further comprises a first friction member 7, which first friction member 7 is provided on at least one side of the first elastic member 5 in the axial direction of the spindle 1.

Illustratively, in the case where the first connecting member 2 is abutted against the spacer 12 with the first elastic member 5 provided in the middle of the first fastener 6 and the first connecting member 2, in order to reduce wear between the first connecting member 2 and the adjacent parts during rotation relative to the rotation shaft 1, a first friction member 7 may be provided between the abutment surfaces of the first elastic member 5 and the first connecting member 2. A first friction member 7 may also be provided between the first fastener 6 and the first elastic member 5. For example, the first friction member 7 may employ a rubber gasket. By providing the first friction member 7, the wear of the second disc spring 52 and the first connection member 2 in the first elastic assembly 5 can be reduced during the rotation of the first connection member 2 relative to the rotation shaft 1; during the rotation of the first fastener 6 relative to the rotation shaft 1, the wear of the first fastener 6 and the first disc spring 51 can be reduced.

In still other possible ways, to facilitate the installation of the drive assembly 4, the second connecting member 3 may be configured to include a fixedly connected connecting plate 31 and a connecting bracket 32, where the connecting plate 31 and the connecting bracket 32 enclose a mounting cavity, and at least a portion of the drive assembly 4 is located in the mounting cavity.

Illustratively, the connection plate 31 may be provided in a flat plate-like structure, and a through hole is provided in the connection plate 31, the through hole having a larger diameter than the diameter of the rotation shaft 1, so as to fit the connection plate 31 over the side of the isolation portion 12 on the rotation shaft 1 away from the first connection member 2, and to bring the connection plate 31 into abutment with the isolation portion 12; other numbers of connecting posts, such as three or four, may be extended on the connecting bracket 32 to fixedly connect the connecting bracket 32 and the connecting plate 31 through the connecting posts, so that a mounting cavity may be formed between the connecting plate 31 and the connecting bracket 32. In this way, the end of the shaft 1 where the second connecting member 3 is provided can be positioned in the mounting cavity, and at least a part of the driving assembly 4 can be mounted in the mounting cavity.

In still other realizations, as shown in fig. 1, 2 and 3, the drive assembly 4 may be provided in a form including a drive member 41, a first transmission member 42 and a second transmission member 43. The driving member 41 is fixed on the connecting bracket 32, the first transmission member 42 is fixed on the rotating shaft 1, the second transmission member 43 is fixed on an output shaft of the driving member 41, the first transmission member 42 and the second transmission member 43 are located in the installation cavity, and the first transmission member 42 is in transmission connection with the second transmission member 43.

Illustratively, the driving member 41 may employ a servo motor, a stepping motor, or a general motor. The driving member 41 is fixed to the side of the connection bracket 32 remote from the connection plate 31, and the output shaft of the driving member 41 passes through the connection bracket 32 and extends into the mounting cavity of the second connection member 3.

The first transmission member 42 may be a first gear, which is fixed on the rotating shaft 1, and is located in the installation cavity of the second connecting member 3 along with the rotating shaft 1. Referring to fig. 5, fig. 5 is a schematic structural diagram of a rotating shaft and a first transmission member in the rotating shaft mechanism provided in the present application. In the axial direction along the rotating shaft 1, a positioning surface 111 may be provided on a circumferential side surface of the rotating shaft 1, and the positioning surface 111 may be a plane parallel to the axis of the rotating shaft 1; correspondingly, a plane matched with the positioning surface 111 is arranged on the hole wall of the first gear, so that after the first gear is sleeved on the rotating shaft 1, the first gear and the rotating shaft 1 can synchronously rotate under the limitation of the positioning surface 111 on the rotating shaft 1 and the plane on the hole wall of the first gear.

The second transmission member 43 may be a second gear which is fixed to the output shaft of the driving member 41 and which is also located in the mounting cavity in the second coupling member 3.

In order to allow the spindle 1 to obtain a sufficient torque, a third transmission member 44 may be provided between the first transmission member 42 and the second transmission member 43 to adjust the rotational speed of the first transmission member 42 by the third transmission member 44. For example, the third transmission member 44 may employ a third gear, so that the second gear is meshed with the third gear, and the first gear is meshed with the third gear, and the driving member 41 is decelerated by the third gear, so that the first gear has a larger torque, and the rotating shaft 1 obtains a larger torque.

It should be noted that other transmission structures may be used for the first transmission member 42 and the second transmission member 43. For example, the first transmission member 42 and the second transmission member 43 are provided as two pulleys, respectively, and the two pulleys are connected by a belt. The first and second transmission members 42 and 43 may be provided as sprockets, respectively, which are connected by a chain. The embodiment of the present application is not limited to the specific structural form of the driving assembly 4.

In still other realizable forms, as shown in fig. 1 and 3, the spindle mechanism further includes a second fastening member 9, the second fastening member 9 being disposed on a side of the second connecting member 3 remote from the spacer 12 in the axial direction of the spindle 1, and the pressing force of the second elastic member 8 on the second connecting member 3 can be adjusted by adjusting the position of the second fastening member 9 on the spindle 1.

Illustratively, the connecting plate 31 in the second connecting member 3 is abutted against the isolation portion 12 on the rotating shaft 1, the first transmission member 42 is fixed on the rotating shaft 1, the first transmission member 42 is located on one side of the connecting plate 31 away from the isolation portion 12, and the third disc spring 81 and the fourth disc spring 82 are stacked and abutted against one side of the first transmission member 42 away from the isolation portion 12. In order to adjust the magnitude of the frictional force between the connection plate 31 and the partition 12. An external thread may be provided at one end of the shaft 1 where the second connecting member 3 is provided, and the second fastening member 9 may be a second nut adapted to the external thread. In this way, the second nut can be screwed to adjust the position of the second nut on the rotating shaft 1, and thus the deformation amounts of the third disc spring 81 and the fourth disc spring 82 can be adjusted, so that the magnitude of the friction force between the connecting plate 31 and the isolation portion 12 can be adjusted.

In still other realizable forms, the spindle mechanism further comprises a second friction member 10, the second friction member 10 being provided on at least one side of the second elastic assembly 8 in the axial direction of the spindle 1.

Illustratively, as shown in fig. 3, in the case where the connection plate 31 is abutted against the spacer 12, and the second elastic member 8 is provided in the middle of the second fastener 9 and the first transmission member 42, in order to reduce wear between the first transmission member 42 and the connection plate 31 during rotation of the connection plate 31 relative to the rotation shaft 1, a second friction member 10 may be provided between abutment surfaces of the first transmission member 42 and the connection plate 31. A second friction member 10 may also be provided between the second elastic member 8 and the second fastening member 9. For example, the second friction member 10 may employ a rubber gasket. By providing the second friction member 10, the wear of the first transmission member 42 and the connection plate 31 can be reduced in the process of rotating the connection plate 31 relative to the rotation shaft 1; the wear of the fourth disc spring 82 and the second fastener 9 can also be reduced during the screwing of the second fastener 9.

In still other possible embodiments, the first connecting member 2 and the second connecting member 3 may be respectively sleeved on the rotating shaft 1 instead of providing the isolating portion 12 on the rotating shaft 1. In the radial direction along the rotating shaft 1, a first elastic member is arranged between the hole on the first connecting member 2 and the circumferential side surface of the rotating shaft 1 so as to adjust the deformation of the first elastic member along the radial direction of the rotating shaft 1, thereby adjusting the friction force between the first connecting member 2 and the rotating shaft 1 in the radial direction, and also adjusting the torsion force between the first connecting member 2 and the rotating shaft 1. In the radial direction along the rotating shaft 1, a second elastic member is arranged between the hole on the second connecting member 3 and the circumferential side surface of the rotating shaft 1 to adjust the deformation of the second elastic member along the radial direction of the rotating shaft 1, so that the magnitude of the friction force between the second connecting member 3 and the rotating shaft 1 in the radial direction can be adjusted, and the magnitude of the torsion force between the second connecting member 3 and the rotating shaft 1 can also be adjusted.

The embodiment of the application also provides a projection device, which comprises: the base, the projection host and the rotating shaft mechanism provided by any one of the embodiments, wherein the base is fixedly connected with the first connecting piece 2, the projection host is fixedly connected with the second connecting piece 3, and the projection host is used for generating a projection picture.

For example, a through hole may be provided in the housing of the projection host, and the rotation shaft mechanism may be disposed in the housing of the projection host, that is, the second connecting member 3 is fixedly connected to the inside of the housing of the projection host, and the first connecting member 2 is located at a position where the through hole on the housing is located. A rotating lug can be provided on the base to fix the first connector 2 to the rotating lug. The base may be fixed in an installation position, such as a wall or a table, to fix the projection device in the installation position via the base.

Under the condition that the projection angle of the projection host needs to be manually adjusted, the projection host can be stirred, at the moment, the second connecting piece 3 is fixedly connected with the projection host, the projection host drives the second connecting piece 3 to rotate together, and when the second connecting piece 3 rotates, the second elastic component 8 enables a first friction force to exist between the second connecting piece 3 and the isolation part 12 of the rotating shaft 1, and then the second connecting piece 3 drives the rotating shaft 1 to rotate. The first connecting piece 2 is fixedly connected with the base, the isolation part 12 of the first connecting piece 2 and the rotating shaft 1 has a second friction force under the action of the first elastic component 5, the second friction force is only required to be set smaller than the first friction force, and the second friction force is set larger than the maximum torque generated after the projection host rotates (after the projection host rotates, the projection host generates torque under the action of gravity), so that the second connecting piece 3 drives the rotating shaft 1, the rotating shaft 1 rotates relative to the first connecting piece 2, manual adjustment of the projection angle of the projection host can be completed, and the projection host hovers at any rotation angle relative to the base.

In the case that the projection angle of the projection host needs to be automatically adjusted, a control signal may be sent to the driving member 41, so that the driving member 41 applies a rotation moment to the rotating shaft 1 through the transmission member, at this time, the rotating shaft 1 does not rotate relative to the first connecting member 2, but the second connecting member 3 and the driving assembly 4 rotate together around the rotating shaft 1, so that the projection host can rotate relative to the base. In this process, the driving member 41 needs to overcome the first friction force and the torque formed after the rotation of the projection host, and after the driving member 41 stops working, the projection host can have a certain rotation angle relative to the base and hover and be fixed under the action of the first friction force and the second friction force, so that the automatic adjustment of the projection angle of the projection host can be completed.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structural changes made by the specification and drawings of the present application, or direct or indirect application in other related technical fields, are included in the scope of the claims of the present application.

Claims (10)

1. A spindle mechanism, comprising:

a rotating shaft (1);

the first connecting piece (2) is used for being connected with the first structural piece and is rotatably sleeved at one end of the rotating shaft (1);

the second connecting piece (3) is used for being connected with a second structural piece and is rotatably sleeved at the other end of the rotating shaft (1);

the driving component (4) is arranged on the second connecting piece (3) and is in transmission connection with the rotating shaft (1);

the rotating shaft (1) can rotate relative to the first connecting piece (2) or the second connecting piece (3) under the driving of the driving assembly (4).

2. A spindle mechanism according to claim 1, characterized in that the spindle (1) is provided with a spacer (12), the spacer (12) being formed extending in the radial direction of the spindle (1); in the axial direction along the rotating shaft (1), the first connecting piece (2) and the second connecting piece (3) are respectively positioned at two sides of the isolation part (12).

3. Spindle mechanism according to claim 2, characterized in that it further comprises a first elastic component (5) and a second elastic component (8);

the first elastic component (5) is arranged on one side of the isolation part (12) along the axial direction of the rotating shaft (1) and is abutted against the first connecting piece (2) so as to enable the first connecting piece (2) to be pressed against the isolation part (12); the second elastic component (8) is arranged on the other side of the isolation part (12) and is abutted against the second connecting piece (3) for enabling the second connecting piece (3) to be pressed against the isolation part (12).

4. A spindle mechanism according to claim 3, further comprising a first fastener (6), said first fastener (6) being provided on a side of said first connecting member (2) remote from said spacer (12) in an axial direction of said spindle (1), a pressing force of said first elastic member (5) on said first connecting member (2) being adjustable by adjusting a position of said first fastener (6) on said spindle (1).

5. A spindle mechanism according to claim 3, characterized in that it further comprises a first friction member (7), said first friction member (7) being provided on at least one side of the first elastic member (5) in the axial direction of the spindle (1).

6. A spindle mechanism according to claim 3, further comprising a second fastener (9), said second fastener (9) being provided on a side of said second connection member (3) remote from said spacer (12) in an axial direction of said spindle (1), a pressing force of said second elastic member (8) on said second connection member (3) being adjustable by adjusting a position of said second fastener (9) on said spindle (1).

7. A spindle mechanism according to claim 3, characterized in that it further comprises a second friction member (10), said second friction member (10) being provided on at least one side of said second elastic member (8) in the axial direction of said spindle (1).

8. Spindle mechanism according to any one of claims 1 to 7, characterized in that the second connection piece (3) comprises a fixedly connected connection plate (31) and a connection bracket (32), the connection plate (31) and the connection bracket (32) enclosing a mounting cavity, at least a part of the drive assembly (4) being located in the mounting cavity.

9. The spindle mechanism according to claim 8, characterized in that the drive assembly (4) comprises a drive member (41), a first transmission member (42) and a second transmission member (43), the drive member (41) is fixed on the connection bracket (32), the first transmission member (42) is fixed on the spindle (1), the second transmission member (43) is fixed on an output shaft of the drive member (41), and the first transmission member (42) and the second transmission member (43) are located in the installation cavity, and the first transmission member (42) is in transmission connection with the second transmission member (43).

10. A projection device, comprising:

a base;

the projection host is used for generating a projection picture;

the spindle mechanism according to any one of claims 1 to 9, wherein the base is fixedly connected to the first connecting member (2), and the projection host is fixedly connected to the second connecting member (3).