CN220505711U - Elevating system and projection equipment - Google Patents

Abstract

The application provides a elevating system and projection equipment relates to mechanical driving mechanism technical field. The lifting mechanism can realize non-constant speed motion during the lifting and lowering processes of the executing piece. The lifting mechanism comprises: the device comprises a base body, an executing piece, a cam and a driving assembly, wherein the executing piece is movably arranged on the base body and is provided with an abutting part; at least a part of the circumferential side surface of the cam is in contact with the contact portion; the driving component is arranged on the base body, and the cam is connected with the driving component; the actuator can move in a direction approaching the base body in the process that the driving assembly drives the cam to rotate. The lifting mechanism is used for driving the executing piece to do reciprocating motion.

Description

Elevating system and projection equipment

Technical Field

The application relates to the technical field of mechanical driving mechanisms, in particular to a lifting mechanism and projection equipment.

Background

The lifting mechanism has a plurality of application scenes, and the actuating member can be lifted to a required target position through the lifting mechanism and then lowered back to the initial position, so that the actuating member can reciprocate between the target position and the initial position.

In the related art, the actuator is often driven to rise and fall by means of a threaded rod, a piston rod, or the like. The raising and lowering speeds of the actuators of such a lifting mechanism are generally equal, and the equal raising and lowering speeds may not meet the demands of the actuators for the movement pattern in some cases.

Disclosure of Invention

The application provides a lifting mechanism and projection equipment, can realize the non-constant motion of executive component rise and decline process.

In one aspect, the present application provides a lifting mechanism comprising: the device comprises a base body, an executing piece, a cam and a driving assembly, wherein the executing piece is movably arranged on the base body and is provided with an abutting part; the cam is provided with a notch along the circumferential direction of the cam, and at least one part of the circumferential side surface of the cam is abutted with the abutting part; the driving component is arranged on the base body, and the cam is connected with the driving component; and when the notch moves to a position corresponding to the abutting part in the process that the driving assembly drives the cam to rotate, the executing piece moves towards the direction close to the base body.

The lifting mechanism is provided with the base body, so that the base body can provide support for the lifting mechanism, and the lifting mechanism can be fixed at the installation position through the base body; the driving assembly is arranged on the base body, the cam is connected with the driving assembly, the cam is abutted with the abutting part on the executing piece, and the cam can be rotated under the driving of the driving assembly so as to push the executing piece to move relative to the base body; meanwhile, a notch is arranged on the cam along the circumferential direction of the cam, so that the abutting part loses the support of the cam under the condition that the notch on the cam moves to the corresponding position of the abutting part on the executing piece in the process of rotating the cam, and the executing piece rapidly descends towards the direction close to the base body under the action of gravity or external force. Therefore, the lifting mechanism can realize non-constant-speed movement of the actuating element in the lifting and descending processes.

In one possible implementation of the application, the circumferential profile of the notch has an angle with the radius of the cam, and in the event of movement of the abutment within the notch, a gap is provided between the abutment and the circumferential profile of the notch.

In one possible implementation of the present application, there is also a variable diameter region whose radius continuously varies in the circumferential direction of the cam.

In one possible implementation of the present application, there is also a planar area in the circumferential direction of the cam, the planar area being located between the reducing area and the notch, the circumferential profile of the planar area being planar.

In one possible implementation of the present application, one of the base and the executing member is provided with a limiting groove, and the other is provided with a limiting protrusion corresponding to the limiting groove, and the limiting protrusion is matched with the limiting groove, so that the executing member moves along the axial direction of the base.

In one possible implementation of the present application, the abutment includes a projection extending in an axial direction of the actuator.

In one possible implementation of the application, an elastic element is arranged between the actuating element and the base body, under the action of which the actuating element moves towards the base body.

In one possible embodiment of the present application, the elastic element comprises at least one tension spring, one end of which is connected to the base body and the other end is connected to the actuating element.

In one possible implementation of the present application, the drive assembly includes a drive member, a shaft, and a transmission assembly; the driving piece is fixed on the base body, the rotating shaft is rotatably arranged on the base body, the driving piece is in transmission connection with the rotating shaft through the transmission assembly, and the cam is fixed on the rotating shaft.

In another aspect, the present application provides a projection device comprising: the projection host and the lifting mechanism provided by any one of the above, wherein the projection host is used for generating a projection picture, and the projection host is connected with the base body.

The projection device provided by the application has the same technical effect as the lifting mechanism of any one of the above, and can realize the non-constant speed movement of the lifting and lowering process of the executing piece.

Drawings

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

FIG. 2 is a cross-sectional view of a lift mechanism provided herein;

FIG. 3 is a schematic view of a lifting mechanism provided herein;

fig. 4 is a schematic view of a cam in the lifting mechanism provided in the present application.

Reference numerals illustrate:

1-a substrate; 11-a base; 12-a housing; 121-opening; 2-an actuator; 21-an abutment; 3-cams; 31-notch; 32-reducing area; 33-planar area; 34-transition region; 35-fixing holes; 4-a drive assembly; 41-a driving member; 42-rotating shaft; 43-a transmission assembly; 431—a drive gear; 432-driven gear; 44-connecting the brackets; 5-an elastic member; 6, a limit groove; 7-limit bump.

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.

The embodiment of the application provides a lifting mechanism, and with reference to fig. 1, fig. 2, fig. 3 and fig. 4, fig. 1 is an exploded view of the lifting mechanism provided by the application, fig. 2 is a cross-sectional view of the lifting mechanism provided by the application, fig. 3 is a schematic view of the lifting mechanism provided by the application, and fig. 4 is a schematic view of a cam in the lifting mechanism provided by the application.

The elevating system that this application embodiment provided includes: the device comprises a base body 1, an executing piece 2, a cam 3 and a driving assembly 4, wherein the executing piece 2 is movably arranged on the base body 1, and the executing piece 2 is provided with an abutting part 21; in the circumferential direction of the cam 3, the cam 3 has a notch 31 thereon, and at least a part of the circumferential side surface of the cam 3 abuts against the abutment 21 on the actuator 2; the driving component 4 is arranged on the base body 1, and the cam 3 is connected with the driving component 4; wherein, during the process that the driving component 4 drives the cam 3 to rotate, when the notch 31 on the cam 3 moves to a position corresponding to the abutting part 21, the executing piece 2 moves towards the direction approaching to the base body 1.

The substrate 1 in the embodiment of the application can be a supporting bracket with supporting function, and provides mounting points and support for other parts in the lifting mechanism; the lifting mechanism may be a fixing bracket for mounting, and the lifting mechanism may be fixed at the mounting position by the base 1.

The executing piece 2 in the embodiment of the present application may be an object carrying platform, which is used for carrying an object to be transported, so as to raise the object to be transported by a certain height, or lower the object to be transported by a certain height; the function member may be a function member for realizing a certain function, for example, a lamp such as a lighting lamp or an atmosphere lamp, or may be a sound, etc., and after the function member is lifted or lowered by a certain distance, the function member starts to execute the function.

The drive assembly 4 of the present embodiment may be a drive assembly 4 comprising an electric drive for providing rotational power to the cam 3.

In the embodiment of the application, as the base body 1 is arranged in the lifting mechanism, the lifting mechanism can be supported by the base body 1, and the lifting mechanism can be fixed at the installation position by the base body 1; the driving assembly 4 is arranged on the base body 1, the cam 3 is connected with the driving assembly 4, the cam 3 is abutted with the abutting part 21 on the executing piece 2, and the cam 3 can be rotated under the driving of the driving assembly 4 so as to push the executing piece 2 to move relative to the base body 1; meanwhile, when the notch 31 is provided in the cam 3 along the circumferential direction of the cam 3, the abutment 21 will lose the support of the cam 3 when the notch 31 in the cam 3 moves to the position corresponding to the abutment 21 in the actuator 2 during rotation of the cam 3, so that the actuator 2 will rapidly descend in the direction approaching the base 1 under the action of gravity or external force. Therefore, the lifting mechanism provided by the embodiment of the application can realize the non-constant speed motion of the executing piece 2 in the lifting and descending processes.

In some possible ways, as shown in fig. 1, the base body 1 may be provided in a structure including a base 11 and a housing 12. Wherein, the casing 12 is sleeved on the base 11, an opening 121 is formed on the casing 12, the executing piece 2 can be accommodated in the casing 12, and the executing piece 2 can pass through the opening 121 on the casing 12 and pass out or retract from the casing 12.

Illustratively, the base 11 may be provided to include a disc-shaped bottom surface on which a structural form of a supporting frame for supporting the driving assembly 4 is provided. Correspondingly, the shell 12 is provided with a cylindrical structure, and the cylindrical shell 12 is sleeved on the base 11.

In the embodiment of the application, the base 1 is provided in a structural form comprising the base 11 and the shell 12, so that structural components such as the executing piece 2, the driving assembly 4 and the cam 3 in the lifting mechanism are convenient to install.

In other possible ways, during the rotation of the cam 3, not only a thrust force in the axial direction of the actuating element 2 but also a thrust force in the radial direction of the actuating element 2 is exerted on the actuating element 2. In order to allow the actuator 2 to move in a fixed path relative to the base body 1. As shown in fig. 2, a limit groove 6 may be provided on one of the base 1 and the actuator 2, and a limit protrusion 7 corresponding to the limit groove 6 may be provided on the other of the base 1 and the actuator 2, so that the actuator 2 moves in the axial direction of the base 1 by the engagement of the limit protrusion 7 with the limit groove 6.

For example, a limit groove 6 may be provided on the base 11 in the base 1, or a limit groove 6 may be provided on an inner wall of the housing 12 in the base 1, the limit groove 6 being formed to extend in the axial direction of the base 1. For example, three, four, five, or the like other numbers of the limit grooves 6 are provided in the circumferential direction along the base body 1. Correspondingly, a limit projection 7 matched with each limit groove 6 is arranged on the executing piece 2, and the limit projection 7 on the executing piece 2 is also formed in an extending manner along the axial direction of the base body 1.

As another example, a limit projection 7 may be provided on the base 11 in the base 1, or a limit projection 7 may be provided on an inner wall of the housing 12 in the base 1, the limit projection 7 being formed to extend in the axial direction of the base 1. For example, three, four, five, or the like other numbers of the limit projections 7 are provided in the circumferential direction along the base body 1. Correspondingly, a limit groove 6 matched with each limit protrusion 7 is arranged on the executing piece 2, and the limit groove 6 on the executing piece 2 is also formed by extending along the axial direction of the base body 1.

In this embodiment, by respectively providing the base 1 and the actuating member 2 with the adaptive limiting groove 6 and the limiting protrusion 7, the movement path of the actuating member 2 relative to the base 1 can be limited by the cooperation of the limiting groove 6 and the limiting protrusion 7, so that the actuating member 2 moves along a fixed path under the action of the cam 3.

In still other realizable forms, as shown in fig. 2, the abutment 21 on the actuator 2 may be provided as a projection extending in the axial direction of the actuator 2.

Illustratively, a protrusion corresponding to the position of the cam 3 may be formed on the inner surface of the actuator 2 so as to extend from the inner surface of the actuator 2 in a direction approaching the base body 1. The ends of the posts may be provided as rounded surfaces.

As another example, in order to reduce friction between the boss and the cam 3, a roller whose axial direction coincides with the axial direction of the cam 3 may be provided at an end portion of the boss. So that the sliding friction between the boss and the cam 3 can be changed to rolling friction to reduce the friction between the boss and the cam 3.

In still other realizations, as shown in fig. 2 and 3, the drive assembly 4 may be provided in a configuration including a drive 41, a spindle 42, and a transmission assembly 43. Wherein, the driving piece 41 is fixed on the base 1, the rotating shaft 42 is rotatably arranged on the base 1, the driving piece 41 is in transmission connection with the rotating shaft 42 through the transmission component 43, and the cam 3 is fixed on the rotating shaft 42.

Illustratively, the driving member 41 may employ a servo motor, a stepping motor, or a general motor. In order to facilitate the fixing of the driving member 41, a connection bracket 44 may be provided, the driving member 41 is fixedly connected to the connection bracket 44, and the connection bracket 44 is fixed to the base 11.

The rotation shaft 42 may be provided in a cylindrical structure, one cam 3 is fixed to each of both ends of the rotation shaft 42, and the profiles of the two cams 3 coincide in the axial direction along the rotation shaft 42. Two rotating clamping grooves matched with the rotating shaft 42 can be formed in the base 11, so that the rotating shaft 42 is clamped on the base 11 through the rotating clamping grooves in the base 11. Wherein, the inner diameter of the rotating clamping groove is larger than the diameter of the rotating shaft 42, and the rotating shaft 42 can freely rotate in the rotating clamping groove. The positioning clamping groove can be further formed in the rotating shaft 42, after the rotating shaft 42 is arranged in the rotating clamping groove in the base 11, the C-shaped clamping spring can be clamped in the positioning clamping groove, the position of the C-shaped clamping spring in the rotating shaft 42 corresponds to the position of the rotating clamping groove in the base 11, the C-shaped clamping spring can be abutted against the edge of the rotating clamping groove, and accordingly the rotating shaft 42 is positioned in the axial direction along the rotating shaft 42 through the C-shaped clamping spring, and therefore axial movement of the rotating shaft 42 on the base 11 is reduced.

The transmission assembly 43 may be provided in a structure including a driving gear 431 and a driven gear 432. The driving gear 431 is fixed to the output shaft of the driving member 41, and the driven gear 432 is fixed to the rotating shaft 42, so that the driven gear 432 and the driving gear 431 are engaged to drivingly connect the driving member 41 and the rotating shaft 42. The transmission assembly 43 may also be provided in a structure comprising pulleys and a belt, for example, one pulley being fixed to the output shaft of the driving member 41, one pulley being fixed to the rotation shaft 42, and the two pulleys being connected by a belt transmission.

In this embodiment, by providing two cams 3 on the rotating shaft 42, the actuator 2 can be subjected to the urging force of the two cams 3, so that the movement process of the actuator 2 is smoother. The reliability of the lifting mechanism can also be improved.

In still other possible ways, as shown in fig. 4, in order to facilitate the fixing of the cam 3, a fixing hole 35 may be provided on the cam 3, and the fixing hole 35 may be provided as a D-shaped through hole, that is, a part of the fixing hole 35 is in a circular arc shape, and the other part is in a plane, and correspondingly, a mounting structure matched with the fixing hole 35 is provided on the rotating shaft 42 to fix the cam 3 on the rotating shaft 42.

Illustratively, there is a variable diameter region 32 in the circumferential direction of the cam 3, the radius of the variable diameter region 32 continuously varying. In the circumferential direction of the cam 3, it is also possible to provide a transition region 34, the transition region 34 of the cam 3 being provided at a position closest to the center of rotation of the cam 3, i.e. the radius of the circumferential profile of the transition region 34 on the cam 3 is smallest. As shown in fig. 4, adjacent to the transition region 34 in the clockwise direction is a variable diameter region 32, the radius of the circumferential profile surface of the variable diameter region 32 on the cam 3 gradually increases, and the radius of the circumferential profile surface of the variable diameter region 32 continuously changes. In this way, in the case where the transition region 34 on the cam 3 abuts against the abutment 21 on the actuator 2, the actuator 2 is located at the lowest position, that is, the position of the actuator 2 closest to the base 11; during the rotation of the cam 3 in the counterclockwise direction by the driving element 41, the diameter-changing region 32 of the cam 3 abuts against the abutment 21 of the actuator 2, and as the cam 3 rotates, the radius of the diameter-changing region 32 gradually increases, and the actuator 2 starts to rise, that is, the actuator 2 starts to move in a direction away from the base 11.

Another example is that in the circumferential direction of the cam 3, there is also a planar area 33, the planar area 33 being located between the diameter-changing area 32 and the notch 31, the circumferential profile of the planar area 33 being planar. For example, a flat surface area 33 may be provided at the end of the side of the variable diameter area 32 where the radius is largest, the plane of the circumferential contour surface of the flat surface area 33 may be perpendicular to the radius of the cam 3, and the circumferential contour surface of the flat surface area 33 is also the area farthest from the rotation center of the cam 3. In the circumferential direction of the cam 3, the planar area 33 may be provided as a plane having a width of 2mm to 5 mm. In this way, when the flat surface area 33 is in contact with the contact portion 21 on the actuator 2 during rotation of the cam 3, the actuator 2 is raised to the highest point. At this time, since the abutment portion 21 abuts on the flat surface, the relative movement between the abutment portion 21 and the cam 3 is not easily generated, and the cam 3 is not easily rotated, so that the actuator 2 can be stably stopped at the highest point.

Adjacent to the planar area 33 is a notch 31 in the cam 3, as shown in fig. 4. When the actuator 2 rises to the highest point, the cam 3 is driven by the driving member 41 to rotate by a small angle in the counterclockwise direction, so that the notch 31 on the cam 3 can rotate to a position corresponding to the abutment portion 21 on the actuator 2, the radius of the circumferential profile surface of the notch 31 is rapidly reduced due to the abrupt change of the circumferential profile surface of the notch 31 of the cam 3, and at this time, the abutment portion 21 loses the support of the cam 3, and the actuator 2 rapidly descends under the action of gravity, that is, the actuator 2 rapidly moves toward the base 11. The driving element 41 also stops working and the cam 3 stops rotating until the abutment 21 again abuts the transition region 34 on the cam 3 and the movement of the actuator 2 stops. So far, the cam 3 rotates for one circle completely, and the actuating member 2 also completes a uniform ascending and rapid descending movement process.

As yet another example, the notch 31 on the cam 3 may be provided in a configuration having an angle with the radius of the cam 3, with a gap between the abutment 21 and the circumferential profile of the notch 31 in the event that the abutment 21 moves within the notch 31.

For example, the circumferential profile of the notch 31 may be set as: the position on the circumferential profile surface near the rotation center of the cam 3 is inclined in a direction closer to the diameter-changing region 32. In this way, the side surface of the boss does not come into contact with the circumferential contour surface of the notch 31 during the movement of the boss as the abutment portion 21 from the position of the planar region 33 to the position close to the transition region 34, so that the risk of the boss being blocked by the cam 3 during the falling down can be reduced, so that the actuator 2 can be lowered at the fastest speed.

In still other possible ways, as shown in fig. 1, an elastic member 5 may be provided between the actuator 2 and the base 1, and the actuator 2 moves toward the base 1 under the action of the elastic member 5.

The elastic member 5 illustratively comprises at least one extension spring, one end of which may be connected to the base 1 and the other end of which may be connected to the actuating member 2. For example, one end of the tension spring may be hooked to the housing 12, and the other end may be hooked to the actuator 2; four extension springs may be provided, which are distributed in the circumferential direction of the actuator 2.

As another example, the elastic member 5 may be provided to include at least one compression spring, and one end of the compression spring may be abutted against a side of the actuator 2 near the base 11, and the other end of the compression spring may be abutted against a side of the base 11 near the actuator 2.

In this embodiment, by providing the elastic member 5 including the tension spring or the compression spring between the actuator 2 and the base 1, the compression spring is compressed or the tension spring is stretched during the ascent of the actuator 2, and at this time, the actuator 2 is made to have a tendency to move toward the base 11 by the elastic force of the compression spring or the tension spring. In the case where the notch 31 on the cam 3 moves to a position corresponding to the boss, the actuator 2 can move in a direction approaching the base 11 at a faster speed by the elastic member 5.

The embodiment of the application also provides a projection device, and the working principle of the projection device is that light is irradiated onto a display element of an image, so that an image is generated, and projection is performed through a lens, so that a projection picture is generated. The projection device comprises a projection host and the lifting mechanism provided by any one of the embodiments, wherein the projection host is used for generating a projection picture, and can be connected with the base body 1 to mount the projection device on a wall surface, a desktop or the ground through the base body 1. The actuator 2 in the projection device may be configured as an atmosphere lamp or a sound, which is simultaneously projected from the base 1 during operation of the projection host.

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 lifting mechanism, comprising:

a base body (1);

an actuator (2) movably disposed on the base body (1) and having an abutting portion (21);

a cam (3) having a notch (31) in a circumferential direction of the cam (3), at least a part of a circumferential side surface of the cam (3) being in contact with the contact portion (21);

the driving assembly (4) is arranged on the base body (1), and the cam (3) is connected with the driving assembly (4);

wherein, in the process that the driving component (4) drives the cam (3) to rotate, when the notch (31) moves to a position corresponding to the abutting part (21), the executing piece (2) moves towards a direction approaching to the base body (1).

2. Lifting mechanism according to claim 1, characterized in that an angle is formed between the circumferential profile of the gap (31) and the radius of the cam (3), and that a gap is formed between the abutment (21) and the circumferential profile of the gap (31) in the event of a movement of the abutment (21) in the gap (31).

3. The lifting mechanism according to claim 1, characterized in that there is also a reducing area (32) in the circumferential direction of the cam (3), the radius of the reducing area (32) continuously varying.

4. A lifting mechanism according to claim 3, characterized in that there is also a planar area (33) in the circumferential direction of the cam (3), the planar area (33) being located between the reducing area (32) and the indentation (31), the circumferential profile of the planar area (33) being planar.

5. Lifting mechanism according to any one of claims 1 to 4, characterized in that one of the base body (1) and the actuating element (2) is provided with a limit groove (6), the other is provided with a limit projection (7) corresponding to the limit groove (6), and the limit projection (7) cooperates with the limit groove (6) to move the actuating element (2) in the axial direction of the base body (1).

6. The lifting mechanism according to any one of claims 1 to 4, wherein the abutment (21) comprises a boss formed extending in an axial direction of the actuator (2).

7. Lifting mechanism according to any one of claims 1 to 4, characterized in that an elastic element (5) is arranged between the actuating element (2) and the base body (1), the actuating element (2) being moved towards the base body (1) under the action of the elastic element (5).

8. Lifting mechanism according to claim 7, characterized in that the elastic element (5) comprises at least one tension spring, one end of which is connected to the base body (1) and the other end is connected to the actuating element (2).

9. The lifting mechanism according to any one of claims 1 to 4, wherein the drive assembly (4) comprises a drive member (41), a rotating shaft (42) and a transmission assembly (43); the driving piece (41) is fixed on the base body (1), the rotating shaft (42) is rotatably arranged on the base body (1), the driving piece (41) is in transmission connection with the rotating shaft (42) through the transmission component (43), and the cam (3) is fixed on the rotating shaft (42).

10. A projection device, comprising:

the projection host is used for generating a projection picture;

the lifting mechanism of any one of claims 1 to 9, the projection host being connected to the base body (1).