A micro electro mechanical cylinder and a device having a micro electro mechanical cylinder

Abstract

The application discloses a micro electric cylinder and a device with the same, and belongs to the electric cylinder field. The micro electric cylinder comprises a shell, a driving assembly, a transmission assembly, a detection assembly and a controller. The shell is provided with an accommodating cavity with an open end, and a guide rail is arranged on the cavity wall of the accommodating cavity. The driving assembly comprises a rotary driving piece and a driving wheel, and the driving wheel is connected with the rotary end of the rotary driving piece. The transmission assembly comprises a first transmission wheel, a rotating piece, a moving piece and a sliding piece. The first transmission wheel is connected with the rotating piece and is in meshing connection with the driving wheel. The moving piece is sleeved on the rotating piece and is in threaded connection with the rotating piece. The sliding piece is integrally formed with the moving piece or is in clamping connection with the moving piece. The sliding piece is in sliding connection with the guide rail, and the moving piece is in sliding connection with the opening. The detection assembly comprises an angular displacement detection unit and a linear displacement detection unit. The controller is electrically connected with the angular displacement detection unit, the rotary driving piece and the linear displacement detection unit. The micro electric cylinder provided by the application guarantees the linear motion precision.

Description

Technical Field

[0001] This application relates to the field of electric cylinder technology, and more particularly to a miniature electric cylinder and a device having a miniature electric cylinder. Background Technology

[0002] Electric cylinders are commonly used mechanical components in motion control. They are generally modular products with an integrated design of a servo motor and a lead screw, converting the rotary motion of the servo motor into linear motion. They are mostly used for horizontal handling and vertical lifting of objects, and mainly consist of a motor, lead screw, nut, slider, and guide rail. The working principle is that the controller controls the motor's speed and revolutions, the motor drives the lead screw to rotate, and the lead screw in turn drives the nut to move the slider linearly along the guide rail.

[0003] In existing technology, the slider and nut are generally fastened together with screws to enable synchronous linear movement. However, this connection method is prone to screw loosening during long-term use, which affects the stability and reliability of the connection between the slider and nut, thereby affecting the accuracy of the nut's linear movement. Summary of the Invention

[0004] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a miniature electric cylinder.

[0005] To solve the above-mentioned technical problems, this application provides: A miniature electric cylinder, comprising: The housing has a receiving cavity open at one end, and the cavity wall is provided with guide rails; A drive assembly, disposed within the receiving cavity, includes a rotary drive component and a drive wheel, the drive wheel being fixedly connected to the rotating end of the rotary drive component; A transmission assembly includes a first transmission wheel, a rotating component, a moving component, and a sliding component. The first transmission wheel is fixedly connected to the rotating component and meshes with the drive wheel. The moving component is sleeved on the outer periphery of the rotating component and threadedly connected to the rotating component. The sliding component is connected to the outer peripheral wall of the moving component and slidably connected to the guide rail. The outer peripheral wall of the moving component is slidably connected to the inner peripheral wall of the opening. The detection component includes an angular displacement detection unit and a linear displacement detection unit. The angular displacement detection unit is used to detect the angular displacement of the rotary drive component, and the linear displacement detection unit is used to detect the linear displacement of the slider component. The controller is electrically connected to the angular displacement detection unit and the rotary drive unit, and is also electrically connected to the linear displacement detection unit.

[0006] In addition, the miniature electric cylinder according to this application may also have the following additional technical features: In some embodiments of this application, the slider and the outer peripheral wall of the movable member are integrally formed.

[0007] In some embodiments of this application, the slider is snapped into the outer peripheral wall of the movable member.

[0008] In some embodiments of this application, the sliding member is provided with a protrusion, and the outer peripheral wall of the moving member is provided with a groove that engages with the protrusion; Alternatively, the sliding member may have a groove, and the outer peripheral wall of the moving member may have a protrusion that engages with the groove.

[0009] In some embodiments of this application, the groove includes a bottom wall and two side walls, the two side walls being connected to opposite sides of the bottom wall respectively, both side walls being inclined from the direction close to the bottom wall to the direction away from the bottom wall, and the inclination directions of the two side walls being close to each other, the protrusion being adapted to the shape of the groove, and the end wall of the moving member having an opening communicating with the groove, the protrusion being disposed in the groove through the opening.

[0010] In some embodiments of this application, the angular displacement detection unit includes an angular displacement encoder and a code disk. The angular displacement encoder is disposed on the fixed end of the rotary drive component, and the code disk is disposed on the rotating end of the rotary drive component. The angular displacement encoder is electrically connected to the controller and is used to detect the angular displacement of the code disk.

[0011] In some embodiments of this application, the linear displacement detection unit includes a linear displacement encoder and a code ruler. The linear displacement encoder is disposed on the guide rail, and the code ruler is disposed on the sliding member. The linear displacement encoder is electrically connected to the controller and is used to detect the linear displacement of the code ruler.

[0012] In some embodiments of this application, the transmission assembly further includes a transmission shaft, a second transmission wheel, and a third transmission wheel. The transmission shaft is rotatably disposed within the receiving cavity. The second and third transmission wheels are both fixedly connected to the transmission shaft. The second transmission wheel is meshed with the drive wheel, and the third transmission wheel is meshed with the first transmission wheel.

[0013] In some embodiments of this application, the detection component further includes a pressure detection unit disposed on the side of the housing near the opening and electrically connected to the controller.

[0014] Secondly, this application also provides a device with a miniature electric cylinder, including the miniature electric cylinder described in any of the above embodiments.

[0015] Compared to existing technologies, the beneficial effects of this application are: This application proposes a miniature electric cylinder. During operation, the rotating end of the rotary drive component drives the drive wheel to rotate. Under the meshing connection between the drive wheel and the first transmission wheel, the rotating component rotates synchronously. Thus, under the threaded connection between the rotating component and the moving component, the moving component moves reciprocally in a linear motion relative to the rotating component and slides reciprocally in a linear motion along the inner circumferential wall of the opening, realizing the function of reciprocating linear extension and retraction of the moving component, thereby pushing an object. During this process, the sliding component follows the moving component and moves reciprocally in a linear motion synchronously and slides reciprocally in a linear motion along the guide rail, thereby improving the accuracy and stability of the reciprocating linear motion of the moving component.

[0016] By integrally molding or snap-fitting the outer peripheral walls of the sliding component and the moving component, the sliding component can synchronously and stably reciprocate linearly and smoothly slide along the guide rail, enabling it to move in a straight line along the guide rail in a synchronized manner. Compared to the screw-fastening method used in existing technologies, the integral molding or snap-fitting of the outer peripheral walls of the sliding component and the moving component effectively improves the connection stability and reliability between them, preventing loosening during long-term use that could affect the connection stability and reliability and thus the technical problem of affecting the reciprocating linear movement accuracy of the moving component. By electrically connecting the controller to the angular displacement detection unit for detecting the angular displacement of the rotary drive component and the rotary drive component respectively, the controller can accurately control the start and stop of the rotary drive component based on the angular displacement signal fed back by the angular displacement detection unit, thereby accurately controlling the linear displacement of the moving component. Simultaneously, by electrically connecting the controller to the linear displacement detection unit for detecting the linear displacement of the sliding component, the controller can also accurately control the start and stop of the rotary drive component based on the linear displacement signal fed back by the linear displacement detection unit, thereby assisting the angular displacement detection unit in further improving the accuracy of controlling the linear displacement of the moving component. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional schematic diagram of a miniature electric cylinder is shown in some embodiments of this application; Figure 2 An exploded view of a miniature electric cylinder is shown in some embodiments of this application; Figure 3 An exploded view of the rotary drive and angular displacement detection unit in some embodiments of this application is shown; Figure 4A perspective view of the moving part, sliding part, and guide rail in some embodiments of this application is shown; Figure 5 An exploded view of the moving part, sliding part, and guide rail in some embodiments of this application is shown.

[0019] A three-dimensional schematic diagram.

[0020] Explanation of key component symbols: 100-Miniature Electric Cylinder; 110 - Housing; 111 - Receiving cavity; 1111 - Guide rail; 112 - Opening; 120 - Drive assembly; 121 - Rotary drive component; 122 - Drive wheel; 130 - Transmission assembly; 131 - First transmission wheel; 132 - Rotating component; 133 - Moving component; 1331 - Groove; 13311 - Bottom wall; 13312 - Side wall; 1332 - Clearance opening; 134 - Sliding component; 1341 - Protrusion; 135 - Transmission shaft; 136 - Second transmission wheel; 137 - Third transmission wheel; 140 - Detection component; 141 - Angular displacement detection unit; 1411 - Angular displacement encoder; 1412 - Code disk; 142 - Linear displacement detection unit; 1421 - Linear displacement encoder; 1422 - Code ruler; 143 - Pressure detection unit; 150-Controller. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] like Figure 1 and Figure 2 As shown, an embodiment of this application provides a miniature electric cylinder 100, which is mainly used in devices having the miniature electric cylinder 100. The miniature electric cylinder 100 includes a housing 110, a drive assembly 120, a transmission assembly 130, a detection assembly 140, and a controller 150.

[0027] The housing 110 has a receiving cavity 111 with an opening 112 at one end, and a guide rail 1111 is provided on the cavity wall of the receiving cavity 111. The driving assembly 120 is disposed in the receiving cavity 111 and includes a rotary driving member 121 and a driving wheel 122, the driving wheel 122 being fixedly connected to the rotating end of the rotary driving member 121.

[0028] The transmission assembly 130 includes a first transmission wheel 131, a rotating component 132, a moving component 133, and a sliding component 134. The first transmission wheel 131 is fixedly connected to the rotating component 132 and meshes with the drive wheel 122. The moving component 133 is sleeved on the outer periphery of the rotating component 132 and threadedly connected to the rotating component 132. The sliding component 134 is integrally formed with or snap-fitted to the outer peripheral wall of the moving component 133. The sliding component 134 is slidably connected to the guide rail 1111. The outer peripheral wall of the moving component 133 is slidably connected to the inner peripheral wall of the opening 112.

[0029] The detection component 140 includes an angular displacement detection unit 141 and a linear displacement detection unit 142. The angular displacement detection unit 141 is used to detect the angular displacement of the rotary drive member 121, and the linear displacement detection unit 142 is used to detect the linear displacement of the slider 134. The controller 150 is electrically connected to the angular displacement detection unit 141 and the rotary drive member 121, and is also electrically connected to the linear displacement detection unit 142.

[0030] The miniature electric cylinder 100 provided in the embodiments of this application, when in operation, the rotating end of the rotary drive member 121 drives the drive wheel 122 to rotate. Under the meshing connection between the drive wheel 122 and the first transmission wheel 131, the rotating member 132 is driven to rotate synchronously. Thus, under the threaded connection between the rotating member 132 and the moving member 133, the moving member 133 moves reciprocally in a straight line relative to the rotating member 132 and slides reciprocally in a straight line along the inner peripheral wall of the opening 112, realizing the function of reciprocating linear extension and retraction of the moving member 133, thereby pushing the object. During this process, the sliding member 134 moves reciprocally in a straight line synchronously with the moving member 133 and slides reciprocally in a straight line along the guide rail 1111, so as to improve the accuracy and stability of the reciprocating linear movement of the moving member 133.

[0031] By integrally forming or snap-fitting the outer peripheral wall of the sliding member 134 and the moving member 133, the sliding member 134 can synchronously and stably reciprocate linearly and smoothly slide along the guide rail 1111. Compared with the screw fastening method in the prior art, the integral forming or snap-fitting of the outer peripheral wall of the sliding member 134 and the moving member 133 effectively improves the connection stability and reliability between the two, and avoids the technical problem of loosening during long-term use, which affects the connection stability and reliability between the two and affects the reciprocating linear movement accuracy of the moving member.

[0032] By electrically connecting the controller 150 to the angular displacement detection unit 141 (used to detect the angular displacement of the rotary drive 121) and the rotary drive 121 respectively, the controller 150 can precisely control the start and stop of the rotary drive 121 based on the angular displacement signal fed back by the angular displacement detection unit 141, thereby precisely controlling the linear displacement of the moving member 133. Simultaneously, by electrically connecting the controller 150 to the linear displacement detection unit 142 (used to detect the linear displacement of the sliding member 134), the controller 150 can also precisely control the start and stop of the rotary drive 121 based on the linear displacement signal fed back by the linear displacement detection unit 142, thereby assisting the angular displacement detection unit 141 in further improving the accuracy of controlling the linear displacement of the moving member 133.

[0033] For example, the guide rail 1111 and the cavity wall of the receiving cavity 111 can be integrally formed or fastened with screws. The controller 150 can be a programmable controller, the rotary drive 121 can be a servo motor, and the drive wheel 122 can be a gear. The gear and the rotating end of the rotary drive 121 can be fixedly connected by a key, integrally formed, or screwed. The first transmission wheel 131 can be a gear with a diameter larger than that of the drive wheel 122 to achieve a speed reduction effect. The first transmission wheel 131 and the rotating member 132 can be fixedly connected by a key, integrally formed, or screwed. The outer peripheral wall of the rotating member 132 is provided with an external thread, and the inner peripheral wall of the moving member 133 is provided with an internal thread that mates with the external thread.

[0034] like Figure 4 As shown, in one embodiment of this application, the sliding member 134 and the outer peripheral wall of the moving member 133 are integrally formed, so that the sliding member 134 follows the moving member 133 synchronously and stably to make reciprocating linear movement and smoothly slides along the guide rail 1111. This effectively improves the connection stability and reliability between the two, and avoids the technical problem of loosening during long-term use, which affects the connection stability and reliability between the two and affects the reciprocating linear movement accuracy of the moving member.

[0035] For example, the outer peripheral walls of the slider 134 and the moving part 133 can be integrally formed by machining, 3D printing or injection molding.

[0036] like Figure 5 As shown, in one embodiment of this application, the sliding member 134 is snapped into the outer peripheral wall of the moving member 133, so that the sliding member 134 follows the moving member 133 synchronously and stably to make reciprocating linear movements and smoothly slides along the guide rail 1111. This effectively improves the connection stability and reliability between the two, and avoids the technical problem of the moving member's reciprocating linear movement accuracy being affected by loosening during long-term use, which would affect the connection stability and reliability between the two.

[0037] like Figure 5 As shown in the above embodiments of this application, the sliding member 134 is provided with a protrusion 1341, and the outer peripheral wall of the moving member 133 is provided with a groove 1331 that engages with the protrusion 1341. Under the interference fit of the protrusion 1341 and the groove 1331, a stable connection between the sliding member 134 and the moving member 133 is achieved.

[0038] In other embodiments, the sliding member 134 has a groove 1331, and the outer peripheral wall of the moving member 133 has a protrusion 1341 that engages with the groove 1331. Under the interference fit of the groove 1331 and the protrusion 1341, a stable connection between the sliding member 134 and the moving member 133 is achieved.

[0039] like Figure 5 As shown, in the above embodiment of this application, the groove 1331 includes a bottom wall 13311 and two side walls 13312. The two side walls 13312 are respectively connected to the opposite sides of the bottom wall 13311. The two side walls 13312 are inclined from the direction close to the bottom wall 13311 to the direction away from the bottom wall 13311, and the inclination directions of the two side walls 13312 are close to each other. The protrusion 1341 is adapted to the shape of the groove 1331. The end wall of the moving member 133 is provided with a clearance opening 1332 communicating with the groove 1331. The protrusion 1341 passes through the clearance opening 1332 and is disposed in the groove 1331.

[0040] In this embodiment, the groove 1331 includes a bottom wall 13311 and two side walls 13312 respectively connected to opposite sides of the bottom wall 13311. By setting both side walls 13312 inclined from the direction close to the bottom wall 13311 to the direction away from the bottom wall 13311, and the inclination directions of the two side walls 13312 are close to each other, and a protrusion 1341 is provided to match the shape of the groove 1331, so that both side walls 13312 can limit the protrusion 1341, preventing the protrusion 1341 from disengaging from the groove 1331 in the direction away from the bottom wall 13311, thereby further improving the stability and reliability of the connection between the sliding member 134 and the moving member 133, and further ensuring the accuracy of the reciprocating linear movement of the moving member 133. Meanwhile, by opening a clearance opening 1332 communicating with the groove 1331 on the end wall of the moving part 133, the protrusion 1341 can pass through the clearance opening 1332 and be fitted into the groove 1331.

[0041] like Figure 3As shown, in one embodiment of this application, the angular displacement detection unit 141 includes an angular displacement encoder 1411 and a code disk 1412. The angular displacement encoder 1411 is disposed on the fixed end of the rotary drive member 121, and the code disk 1412 is disposed on the rotating end of the rotary drive member 121. The angular displacement encoder 1411 is electrically connected to the controller 150 and is used to detect the angular displacement of the code disk 1412.

[0042] In this embodiment, by respectively mounting the angular displacement encoder 1411 on the fixed end and the rotating end of the rotary drive 121, the code disk 1412 can rotate relative to the angular displacement encoder 1411, thereby enabling the angular displacement encoder 1411 to detect the angular displacement of the code disk 1412. Simultaneously, by electrically connecting the angular displacement encoder 1411 to the controller 150, the controller 150 can precisely control the start and stop of the rotary drive 121 based on the angular displacement signal fed back by the angular displacement encoder 1411, thereby precisely controlling the linear displacement of the moving member 133.

[0043] For example, the angular displacement encoder 1411 can be an angular displacement magnetic encoder, and the code disk 1412 can be a permanent magnet. The angular displacement encoder 1411 can also be an angular displacement photoelectric encoder, and the code disk 1412 can be an optical code disk.

[0044] like Figure 2 As shown, in one embodiment of this application, the linear displacement detection unit 142 includes a linear displacement encoder 1421 and a code ruler 1422. The linear displacement encoder 1421 is disposed on the guide rail 1111, and the code ruler 1422 is disposed on the slider 134. The linear displacement encoder 1421 is electrically connected to the controller 150 and is used to detect the linear displacement of the code ruler 1422.

[0045] In this embodiment, by mounting the linear displacement encoder 1421 and the scale 1422 on the guide rail 1111 and the slider 134 respectively, the scale 1422 can move linearly relative to the linear displacement encoder 1421, thereby enabling the linear displacement encoder 1421 to detect the linear displacement of the scale 1422. Simultaneously, by electrically connecting the linear displacement encoder 1421 to the controller 150, the controller 150 can precisely control the start and stop of the rotary drive 121 based on the linear displacement signal fed back by the linear displacement encoder 1421, thereby precisely controlling the linear displacement of the moving part 133.

[0046] For example, the linear displacement encoder 1421 can be a linear displacement magnetic encoder, and the code scale 1422 is a magnetic grating. The linear displacement encoder 1421 can also be a linear displacement photoelectric encoder, and the code scale 1422 is an optical grating.

[0047] like Figure 2 As shown, in one embodiment of this application, the transmission assembly 130 further includes a transmission shaft 135, a second transmission wheel 136, and a third transmission wheel 137. The transmission shaft 135 is rotatably disposed within the receiving cavity 111. The second transmission wheel 136 and the third transmission wheel 137 are both fixedly connected to the transmission shaft 135. The second transmission wheel 136 is meshed with the drive wheel 122, and the third transmission wheel 137 is meshed with the first transmission wheel 131.

[0048] For example, both the second transmission wheel 136 and the third transmission wheel 137 can be gears. The diameter of the second transmission wheel 136 is larger than the diameter of the drive wheel 122, and the diameter of the third transmission wheel 137 is smaller than the diameter of the first transmission wheel 131, so as to achieve a further deceleration effect. The second transmission wheel 136, the third transmission wheel 137 and the transmission shaft 135 can be fixedly connected by key connection, integral molding or screw connection.

[0049] like Figure 1 and Figure 2 As shown, in one embodiment of this application, the detection component 140 further includes a pressure detection unit 143, which is disposed on the side of the housing 110 near the opening 112 and is electrically connected to the controller 150.

[0050] In this embodiment, a pressure detection unit 143 electrically connected to the controller 150 is provided on the side of the housing 110 near the opening 112, so as to detect the magnitude of the thrust through the pressure detection unit 143 and feed back the magnitude signal of the force to the controller 150.

[0051] For example, the pressure detection unit 143 can be a pressure detection sensor. There can be two pressure detection sensors, which are located on opposite sides of the moving part 133 to improve the balance and stability of the support for the object, thereby ensuring the accuracy of pressure detection.

[0052] This application also provides a device with a miniature electric cylinder 100, including the miniature electric cylinder 100 described in the above embodiments.

[0053] The device has the miniature electric cylinder 100 of any of the above embodiments, and therefore has all the beneficial effects of the miniature electric cylinder 100, which will not be described in detail here.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A miniature electric cylinder, characterized in that, include: The housing has a receiving cavity open at one end, and the cavity wall is provided with guide rails; A drive assembly, disposed within the receiving cavity, includes a rotary drive component and a drive wheel, the drive wheel being fixedly connected to the rotating end of the rotary drive component; The transmission assembly includes a first transmission wheel, a rotating component, a moving component, and a sliding component. The first transmission wheel is fixedly connected to the rotating component and meshes with the drive wheel. The moving component is sleeved on the outer periphery of the rotating component and threadedly connected to the rotating component. The sliding component is engaged with the outer peripheral wall of the moving component and slidably connected to the guide rail. The outer peripheral wall of the moving component is slidably connected to the inner peripheral wall of the opening. The detection component includes an angular displacement detection unit and a linear displacement detection unit. The angular displacement detection unit is used to detect the angular displacement of the rotary drive component, and the linear displacement detection unit is used to detect the linear displacement of the slider component. The controller is electrically connected to the angular displacement detection unit and the rotary drive unit, respectively, and is also electrically connected to the linear displacement detection unit. The sliding member has a protrusion, and the outer peripheral wall of the moving member has a groove that engages with the protrusion; Alternatively, the sliding member may have a groove, and the outer peripheral wall of the moving member may have a protrusion that engages with the groove; The groove includes a bottom wall and two side walls. The two side walls are respectively connected to opposite sides of the bottom wall. Both side walls are inclined from the direction close to the bottom wall to the direction away from the bottom wall, and the inclination directions of the two side walls are close to each other. The protrusion is adapted to the shape of the groove. The end wall of the moving part is provided with a clearance opening communicating with the groove. The protrusion is disposed in the groove. The transmission assembly further includes a transmission shaft, a second transmission wheel, and a third transmission wheel. The transmission shaft is rotatably disposed within the receiving cavity. The second and third transmission wheels are both fixedly connected to the transmission shaft. The second transmission wheel is meshed with the drive wheel, and the third transmission wheel is meshed with the first transmission wheel.

2. The miniature electric cylinder according to claim 1, characterized in that, The angular displacement detection unit includes an angular displacement encoder and a code disk. The angular displacement encoder is disposed on the fixed end of the rotary drive component, and the code disk is disposed on the rotating end of the rotary drive component. The angular displacement encoder is electrically connected to the controller and is used to detect the angular displacement of the code disk.

3. The miniature electric cylinder according to claim 1, characterized in that, The linear displacement detection unit includes a linear displacement encoder and a code ruler. The linear displacement encoder is mounted on the guide rail, and the code ruler is mounted on the sliding member. The linear displacement encoder is electrically connected to the controller and is used to detect the linear displacement of the code ruler.

4. The miniature electric cylinder according to claim 1, characterized in that, The detection assembly further includes a pressure detection unit, which is disposed on the side of the housing near the opening and is electrically connected to the controller.

5. A device with a miniature electric cylinder, characterized in that, Includes the miniature electric cylinder according to any one of claims 1 to 4.

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