Linear rotary actuator
By incorporating a heat dissipation structure and vias in the linear rotary actuator, the problem of heat accumulation in the linear voice coil motor is solved, achieving efficient heat dissipation without increasing the size, thus ensuring efficient operation and cost control of the equipment.
Patent Information
- Application Number
- CN202420256524.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-02-02
AI Technical Summary
Existing linear rotary actuators suffer from heat dissipation difficulties due to the large amount of heat generated by the linear voice coil motor during operation, and adding heat dissipation structures would lead to increased size and cost.
In linear rotary actuators, heat dissipation structures are provided on the side walls of the mover and stator, and through holes are opened in the housing to allow the mover and stator to directly contact the outside air, thereby increasing the heat dissipation area. At the same time, heat dissipation structures are provided on the connecting parts and the housing to improve heat dissipation efficiency and avoid increasing the size.
It effectively improves heat dissipation efficiency, avoids the increase in size caused by heat dissipation structure, and ensures efficient operation and cost control of equipment.
Smart Images
Figure CN222339141U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of actuators, and in particular to a linear rotary actuator. Background Art
[0002] At present, with the development of science and technology, industrial automation equipment is rapidly entering major enterprises, especially in technical fields or labor-intensive enterprises such as semiconductors, electronic equipment processing, and biopharmaceuticals, and the degree of automation is getting higher and higher. The company's automated production line often requires linear rotary actuators to perform various actions in order to save human resources and improve production efficiency.
[0003] The structure of the linear rotary actuator in the prior art includes a linear actuator and a rotary actuator. A slider is fixed to the output end of the linear actuator, the slider is connected to the rotary actuator, and the output of the rotary actuator is connected to the output shaft. The linear actuator drives the slider to move linearly, and the slider drives the rotary actuator and the output shaft to move linearly. At the same time, the rotary actuator drives the output shaft to rotate, so that the output shaft can move linearly and rotate at the same time.
[0004] However, the existing linear rotary actuator has the following defects: Since the linear rotary actuator usually adopts a linear voice coil motor, the linear voice coil motor is a motor that performs linear motion based on the principle that a power coil placed in a magnetic field will generate a force, and the magnitude of the force is proportional to the current applied to the coil. However, the power coil will generate a lot of heat when it moves, and the space inside the linear rotary actuator is limited. Adding a heat dissipation structure will lead to problems such as increased volume and increased cost. Utility Model Content
[0005] One object of the present application is to provide a linear rotary actuator with good heat dissipation effect and without causing an increase in volume.
[0006] To achieve the above objectives, the technical solution adopted in the present application is: a linear rotary actuator, comprising a shell, a linear drive mechanism, a rotary drive mechanism, a connecting piece and an output shaft, wherein the linear drive mechanism, the rotary drive mechanism, the connecting piece and the output shaft are all arranged inside the shell, and a first clearance hole is provided on the shell at a position corresponding to the output shaft; the rotary drive mechanism is connected to one end of the output shaft, and the rotary drive mechanism is used to drive the output shaft to rotate; the linear rotary mechanism comprises a stator and a mover, the stator is arranged on the shell, the mover is slidably connected to the stator, the mover is connected to the rotary drive mechanism through the connecting piece, and the mover is used to drive the connecting piece, the rotary drive mechanism and the output shaft to move linearly; a first through hole is provided on the shell, and at least one side wall of the mover is exposed in the first through hole.
[0007] Preferably, the side wall of the mover extends outside the first through hole.
[0008] Preferably, the side wall of the stator is exposed in the first through hole, or the side wall of the stator extends outside the first through hole.
[0009] Preferably, a first heat dissipation structure is provided on the side wall of the mover, and the surface area of the first heat dissipation structure is larger than the orthographic projection area of the first heat dissipation structure on the side wall of the mover.
[0010] Preferably, a second heat dissipation structure is provided on at least one of the two side walls of the connector, a second via hole is provided on the shell at a position corresponding to the second heat dissipation structure, and the surface area of the second heat dissipation structure is larger than the direct projection area of the second heat dissipation structure on the side wall of the connector.
[0011] Preferably, a second heat dissipation structure is provided on a side wall of the connecting member; the linear rotary actuator also includes a guide mechanism for guiding the linear movement of the connecting member, and a side of the connecting member away from the second heat dissipation structure is connected to the shell through the guide mechanism.
[0012] Preferably, a linear displacement sensor is provided between the connecting member and the shell, and a third heat dissipation structure is provided on the outer side of the shell corresponding to the linear displacement sensor, and the surface area of the third heat dissipation structure is larger than the orthographic projection area of the third heat dissipation structure on the side wall of the shell.
[0013] Preferably, a fourth heat dissipation structure is provided at a position of the shell corresponding to the stator, and a surface area of the fourth heat dissipation structure is larger than an orthographic projection area of the fourth heat dissipation structure on the side wall of the shell.
[0014] Preferably, the fourth heat dissipation structure is a through hole or a groove.
[0015] Preferably, the linear rotary actuator further comprises a detection mechanism for detecting the rotation speed and the rotation angle of the rotary drive mechanism or the output shaft, and the detection mechanism is arranged at the end of the rotary drive mechanism.
[0016] Preferably, the linear rotary actuator further comprises a limit member, and the limit member is disposed in the housing; when the limit member senses the connecting member, the linear drive mechanism stops driving in the same direction.
[0017] Preferably, the linear rotary actuator further comprises an elastic member, wherein the elastic member is connected to the connecting member, and the elastic member is used to achieve resetting of the connecting member.
[0018] Compared with the prior art, the beneficial effect of the present application is that the present application allows the mover of the linear drive mechanism to directly contact the external air through the first via hole, thereby improving the heat dissipation efficiency, and the first heat dissipation structure is arranged on the side wall of the mover, further increasing the contact area with the external air, greatly improving the heat dissipation efficiency of the mover, and achieving a better heat dissipation effect. In addition, under the action of the first via hole, the problem of increased volume will not be caused by the arrangement of the first heat dissipation structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a front view of the linear rotary actuator in Example 1 provided in the present application.
[0020] Figure 2 This is a front view of the linear rotary actuator in Example 2 provided in the present application.
[0021] Figure 3 Provided for this application Figure 2 Internal structure diagram of the linear rotary actuator.
[0022] Figure 4 Provided for this application Figure 3 A three-dimensional view of the internal structure of the linear rotary actuator.
[0023] Figure 5 Provided for this application Figure 4 A partial enlarged view of point A in the middle.
[0024] Figure 6 This is a front view of the linear rotary actuator in Example 3 provided in the present application.
[0025] Figure 7 A top view of a linear rotary actuator provided in the present application.
[0026] Figure 8 A bottom view of a linear-rotary actuator provided in the present application.
[0027] In the figure: 1. Shell; 11. First through hole; 12. Second through hole; 13. Third heat dissipation structure; 14. Fourth heat dissipation structure; 2. Linear drive mechanism; 21. Stator; 22. Mover; 221. First heat dissipation structure; 3. Rotary drive mechanism; 4. Connector; 41. Second heat dissipation structure; 5. Output shaft; 6. Linear displacement sensor; 61. Fixed ruler; 62. Moving ruler; 7. Elastic member; 8. Guide mechanism. DETAILED DESCRIPTION
[0028] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0029] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.
[0030] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0031] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.
[0032] Embodiment 1
[0033] Reference Figure 1 as well as Figures 3 to 5 The present application provides a linear rotary actuator, comprising a housing 1, a linear drive mechanism 2, a rotary drive mechanism 3, a connecting member 4 and an output shaft 5, wherein the linear drive mechanism 2, the rotary drive mechanism 3, the connecting member 4 and the output shaft 5 are all arranged inside the housing 1, and a first clearance hole is provided on the housing 1 at a position corresponding to the output shaft 5; the rotary drive mechanism 3 is connected to one end of the output shaft 5, and the rotary drive mechanism 3 is used to drive the output shaft 5 to rotate; the linear rotary mechanism comprises a stator 21 and a mover 22, the stator 21 is arranged on the housing 1, the mover 22 is slidably connected to the stator 21, the mover 22 is connected to the rotary drive mechanism 3 through the connecting member 4, and the mover 22 is used to drive the connecting member 4, the rotary drive mechanism 3 and the output shaft 5 to move linearly; a first through hole 11 is provided on the housing 1, and at least one side wall of the mover 22 is exposed in the first through hole 11.
[0034] In this embodiment, the side wall of the mover 22 may also extend outside the first through hole 11. This layout is conducive to the first heat dissipation structure 221 contacting the air outside the housing 1, thereby improving the heat dissipation effect.
[0035] In this embodiment, the linear drive mechanism 2 adopts a voice coil motor, in which the mover 22 includes a coil structure and the stator 21 includes a magnetic material. Since the coil structure generates a large amount of heat during movement, if the heat cannot be dissipated in time, the life of the linear drive structure will be reduced and the efficiency will be reduced.
[0036] Working principle: The present application allows the mover 22 of the linear drive mechanism 2 to directly contact the external air through the first via 11, thereby improving the heat dissipation efficiency. A first heat dissipation structure 221 is provided on the side wall of the mover 22. The surface area of the first heat dissipation structure 221 is greater than the positive projection area of the first heat dissipation structure 221 on the side wall of the mover 22, further increasing the contact area with the external air, greatly improving the heat dissipation efficiency of the mover 22, and achieving a better heat dissipation effect. In addition, under the action of the first via 11, the problem of increased volume will not be caused by the provision of the first heat dissipation structure 221.
[0037] The first heat dissipation structure 221 may be a plurality of grooves, protrusions or deep holes arranged at intervals, all of which improve the heat exchange effect between the mover 22 and the external air by increasing the surface area.
[0038] Embodiment 2
[0039] The difference from the first embodiment is that: in this embodiment, referring to Figure 2 and Figure 3 , the side wall of the stator 21 is exposed in the first via hole 11. By increasing the size of the first via hole 11, the side wall of the stator 21 is exposed in the first via hole 11, thereby increasing the contact area between the side wall of the stator 21 and the air outside the housing 1, thereby improving the heat dissipation effect of the stator 21, that is, further improving the overall heat dissipation effect.
[0040] It should be understood that the side wall of the stator 21 may also extend outside the first through hole 11 and be flush with the side wall of the shell 1 or slightly protrude from the side wall of the shell 1. While improving the heat dissipation effect of the linear drive mechanism 2, the thickness of the shell 1 is further reduced, which is conducive to the application in ultra-narrow scenarios.
[0041] In this embodiment, the side wall of the mover 22 extends outside the first through hole 11 and is flush with the side wall of the stator 21, which can improve the rigidity of the mover 22 and avoid the reduction of its own rigidity due to the setting of the first heat dissipation structure 221. At the same time, this layout is beneficial for the first heat dissipation structure 221 to contact with the air outside the shell 1, thereby improving the heat dissipation effect.
[0042] Embodiment 3
[0043] The difference from the first or second embodiment is that in this embodiment, reference Figure 5A second heat dissipation structure 41 is provided on at least one of the two side walls of the connector 4, and the surface area of the second heat dissipation structure 41 is larger than the orthographic projection area of the second heat dissipation structure 41 on the side wall of the connector 4. The second heat dissipation structure 41 can increase the contact area between the connector 4 and the air, thereby improving the heat dissipation effect of the connector 4.
[0044] It should be understood that the present application does not limit the specific structure of the second heat dissipation structure 41 , and it may be, for example, a through hole, a groove, a heat dissipation fin, or the like.
[0045] In this embodiment, refer to Figure 6 A second via hole 12 is provided on the housing 1 at a position corresponding to the second heat dissipation structure 41. The second via hole 12 can increase the contact area between the second heat dissipation structure 41 and the air outside the housing 1, thereby further improving the heat dissipation effect of the connector 4; at the same time, it is also beneficial to reduce the thickness of the housing 1.
[0046] In this embodiment, refer to Figure 4 and Figure 5 , a second heat dissipation structure 41 is provided on one side wall of the connecting member 4; the linear rotary actuator further comprises a guide mechanism 8 for guiding the linear movement of the connecting member 4, and a side of the connecting member 4 away from the second heat dissipation structure 41 is connected to the housing 1 through the guide mechanism 8. In other words, one side wall of the connecting member 4 improves the heat dissipation effect through the second heat dissipation structure 41, and the other side wall of the connecting member 4 is guided by the guide mechanism 8, that is, the movement direction of the connecting member 4 is controlled by the guide structure, which can ensure the smoothness and accuracy of the movement of the connecting member 4, so as to improve the accuracy of the linear movement of the connecting member 4, the rotary drive mechanism 3 and the output shaft 5.
[0047] It should be understood that the present application does not limit the specific structure of the guide mechanism 8. For example, it can be a slide groove slider structure, preferably a cross-roller guide rail structure. The guide rail and the slider are provided with V-grooves on the opposite sides, and rolling cross rollers are provided between them, which can improve the rigidity of the guide mechanism 8 and avoid deformation.
[0048] In any embodiment of the present application, both side walls of the mover 22 are provided with first heat dissipation structures 221 , and first vias 11 are provided at positions corresponding to the two first heat dissipation structures 221 on the housing 1 , thereby further increasing the heat dissipation efficiency.
[0049] In any embodiment of the present application, refer to Figure 7A linear displacement sensor 6 is provided between the connector 4 and the housing 1. A third heat dissipation structure 13 is provided on the outer side of the housing 1 corresponding to the linear displacement sensor 6. The surface area of the third heat dissipation structure 13 is greater than the positive projection area of the third heat dissipation structure 13 on the side wall of the housing 1. The third heat dissipation structure 13 increases the contact area between the housing 1 and the air, thereby further improving the heat dissipation effect. The linear displacement sensor 6 facilitates the detection of the linear motion of the output shaft 5.
[0050] It should be understood that the present application does not limit the specific structure of the third heat dissipation structure 13, for example, it can be a through hole, a groove, a heat dissipation fin, etc. In addition, the present application does not limit the specific structure of the linear displacement sensor 6, for example, refer to Figure 4 A mounting groove is provided at the top of the connecting member 4, a movable ruler 62 of the linear displacement sensor 6 is arranged in the mounting groove, and a fixed ruler 61 is arranged on a circuit board, and the circuit board is fixed on the housing 1 and arranged opposite to the linear displacement detector.
[0051] In any embodiment of the present application, refer to Figure 8 The fourth heat dissipation structure 14 is provided at the position of the housing 1 corresponding to the stator 21, and the surface area of the fourth heat dissipation structure 14 is larger than the orthographic projection area of the fourth heat dissipation structure 14 on the side wall of the housing 1. The fourth heat dissipation structure 14 increases the contact area between the lower end of the housing 1 and the air, further improving the heat dissipation effect.
[0052] It can be understood that in order to prevent the fourth heat dissipation structure 14 from interfering with the installation, the fourth heat dissipation structure 14 is preferably a through hole or a groove.
[0053] In any embodiment of the present application, a second clearance hole (the second clearance hole is not marked in the drawings) for the cable and the PCB to pass through is provided on the side of the housing 1 away from the first clearance hole. The cable and the PCB can be installed and removed as a whole through the second clearance hole, without having to disassemble the rear side panel of the housing 1 each time to install the cable and the PCB.
[0054] In any embodiment of the present application, the linear rotary actuator further includes a detection mechanism (the detection mechanism is not shown in the drawings) for detecting the rotation speed and rotation angle of the rotary drive mechanism 3 or the output shaft 5, and the detection mechanism is arranged at the end of the rotary drive mechanism 3. The detection mechanism facilitates the detection of the rotation angle and rotation speed of the output shaft 5. The detection mechanism itself is a prior art, for example, the detection mechanism is an angle encoder, and the rotation speed and angle of the rotary drive mechanism 3 can be controlled in real time through the angle encoder, that is, the rotation speed and angle of the output shaft 5 can be controlled in real time.
[0055] In any embodiment of the present application, the linear rotary actuator further includes a limiter (the limiter is not marked in the drawings), which is disposed in the housing 1; when the limiter senses the connecting member 4, the linear drive mechanism 2 stops driving in the same direction. The limiter can prevent the connecting member 4 from moving out of range. The limiter itself and the control method of the linear drive mechanism 2 are both prior art and will not be described in detail here.
[0056] In any embodiment of the present application, refer to Figure 3 and Figure 4 The linear rotary actuator further includes an elastic member 7 , which is connected to the connecting member 4 , and is used to reset the connecting member 4 .
[0057] It should be noted that the present application does not limit the specific structure of the elastic member 7. For example, the elastic member 7 may be a component with elastic force such as a spring or a tension spring. One end of the elastic member 7 is fixed to the tail end of the connecting member 4, and the other end is fixed to the shell 1.
[0058] In any embodiment of the present application, the housing 1 includes a main board enclosing a rectangular cavity and side panels disposed on both sides of the rectangular cavity, the two side panels being a first side panel and a second side panel; the first through hole 11 and the second through hole 12 are located on the main board, the first clearance hole is located on the first side panel, and the second clearance hole is located on the second side panel. The panels of the housing 1 are fixed by screws, and the assembled housing 1 can be compressed to the maximum extent.
[0059] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.
Claims
1. A linear rotary actuator, comprising a housing, a linear drive mechanism, a rotary drive mechanism, a connecting member and an output shaft, wherein the linear drive mechanism, the rotary drive mechanism, the connecting member and the output shaft are all arranged inside the housing, and a first clearance hole is provided on the housing at a position corresponding to the output shaft; the rotary drive mechanism is connected to one end of the output shaft, and the rotary drive mechanism is used to drive the output shaft to rotate; the linear drive mechanism comprises a stator and a mover, the stator is arranged on the housing, the mover is slidably connected to the stator, the mover is connected to the rotary drive mechanism through the connecting member, and the mover is used to drive the connecting member, the rotary drive mechanism and the output shaft to move linearly; characterized in that The housing is provided with a first through hole, and at least one side wall of the mover is exposed in the first through hole.
2. The linear-rotary actuator according to claim 1, characterized in that: The side wall of the mover extends outside the first through hole.
3. The linear-rotary actuator according to claim 1, characterized in that: The side wall of the stator is exposed in the first via hole, or the side wall of the stator extends out of the first via hole.
4. The linear-rotary actuator according to claim 1, characterized in that: A first heat dissipation structure is provided on the side wall of the mover, and the surface area of the first heat dissipation structure is larger than the orthographic projection area of the first heat dissipation structure on the side wall of the mover.
5. The linear-rotary actuator according to claim 1, characterized in that: A second heat dissipation structure is provided on at least one of the two side walls of the connector, a second via hole is provided on the shell at a position corresponding to the second heat dissipation structure, and a surface area of the second heat dissipation structure is larger than an orthographic projection area of the second heat dissipation structure on the side wall of the connector.
6. The linear-rotary actuator according to claim 4, characterized in that: A second heat dissipation structure is provided on a side wall of the connecting member; the linear rotary actuator also includes a guide mechanism for guiding the linear movement of the connecting member, and a side of the connecting member away from the second heat dissipation structure is connected to the housing through the guide mechanism.
7. The linear-rotary actuator according to claim 1, characterized in that: A linear displacement sensor is provided between the connector and the housing. A third heat dissipation structure is provided on the outer side of the housing corresponding to the linear displacement sensor. The surface area of the third heat dissipation structure is larger than the orthographic projection area of the third heat dissipation structure on the side wall of the housing.
8. The linear-rotary actuator according to claim 1, wherein: A fourth heat dissipation structure is provided at a position of the shell corresponding to the stator, and a surface area of the fourth heat dissipation structure is larger than an orthographic projection area of the fourth heat dissipation structure on the side wall of the shell.
9. The linear-rotary actuator according to claim 8, characterized in that: The fourth heat dissipation structure is a through hole or a groove.
10. The linear-rotary actuator according to any one of claims 1 to 9, characterized in that: The linear rotary actuator further comprises a detection mechanism for detecting the rotation speed and rotation angle of the rotary drive mechanism or the output shaft, wherein the detection mechanism is arranged at the end of the rotary drive mechanism; The linear rotary actuator further comprises a limiter, which is arranged in the housing; when the limiter senses the connecting member, the linear drive mechanism stops driving in the same direction; The linear rotary actuator further comprises an elastic member, wherein the elastic member is connected to the connecting member and is used to realize the resetting of the connecting member.