Electric actuator

Abstract

The utility model provides an electric actuator. The electric actuator comprises a mounting seat, a sliding assembly, a driving assembly and a displacement detection piece, the sliding assembly comprises a sliding part and an output shaft, the sliding part is slidably connected to the mounting base, a rack structure is arranged at one end of the sliding part, and the other end of the sliding part is connected with the output shaft. The driving assembly comprises a driving piece and a gear, the gear is meshed with the rack structure and is in transmission connection with the driving piece, and the driving piece is installed on the installation base and used for driving the gear to rotate so as to drive the sliding piece to do linear motion together with the output shaft. The sliding part comprises a first sliding part and a second sliding part, the first sliding part extends in the sliding direction of the sliding part, the second sliding part protrudes out of the side, close to the driving part, of the first sliding part, and the output shaft is fixedly connected with the second sliding part and located at the end, back to the driving part, of the second sliding part. By adopting the electric actuator provided by the utility model, the structural compactness and the mechanical transmission efficiency of the electric actuator are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic control systems, in particular to an electric actuator. Background Art

[0002] Electric actuators are an essential component of automatic control systems. They are drive devices that convert rotational motion into linear motion. Existing electric actuators use a screw drive mechanism to achieve the telescopic motion of the output shaft. However, this requires many components, making them unsuitable for miniaturization and making it difficult for them to simultaneously achieve high thrust and high displacement accuracy. Utility Model Content

[0003] The utility model provides an electric actuator to solve the technical problems in the prior art that the electric actuator is not suitable for miniaturization design and is difficult to have the characteristics of large thrust and high displacement accuracy at the same time.

[0004] In the first aspect, the utility model provides an electric actuator, comprising a mounting seat, a sliding assembly, a driving assembly and a displacement detection member. The sliding assembly comprises a sliding member and an output shaft, the sliding member being slidably connected to the mounting seat, a rack structure being provided at one end of the sliding member, and the other end of the sliding member being connected to the output shaft. The driving assembly comprises a driving member and a gear, the gear being engaged with the rack structure and being transmission-connected to the driving member, the driving member being mounted on the mounting seat and being used to drive the gear to rotate so as to drive the sliding member to perform linear motion together with the output shaft. The sliding member comprises a first sliding portion and a second sliding portion, the first sliding portion being extended along the sliding direction of the sliding member, the second sliding portion being protruding from a side of the first sliding portion close to the driving member, the output shaft being fixedly connected to the second sliding portion and being located at an end of the second sliding portion facing away from the driving member.

[0005] In combination with the first aspect, in a possible implementation, the mounting base includes a first mounting bracket and a second mounting bracket, the first mounting bracket is fixedly connected to the second mounting bracket and arranged along the length direction of the electric actuator, and the driving member is installed on the first mounting bracket.

[0006] In combination with the first aspect, in a possible implementation, the second mounting frame is provided with a side wall facing the first mounting frame to avoid the second sliding part, the bottom of the avoidance groove is provided with a through hole, the output shaft is movably arranged in the through hole, and the bottom of the second mounting frame is provided with a supporting part facing the side close to the driving member, the supporting part is fixedly connected to the first mounting frame, and is used to support the second sliding part.

[0007] In combination with the first aspect, in a possible implementation, the electric actuator further includes a displacement detection member, which is arranged close to the second sliding portion and arranged together with the second sliding portion in the width direction of the electric actuator. The displacement detection member is used to detect the sliding distance of the sliding portion, and the width direction of the electric actuator is perpendicular to the length direction of the electric actuator and the height direction of the electric actuator.

[0008] In combination with the first aspect, in a possible implementation, the displacement detection component includes a reader and a ruler, the reader is fixedly connected to the second mounting bracket, the ruler is fixedly connected to the second sliding part, and is located on the side of the second sliding part close to the reader, the ruler can follow the second sliding part into the avoidance groove, and is arranged to avoid the avoidance groove.

[0009] In combination with the first aspect, in a possible implementation, a mounting groove is provided on a side wall of the supporting portion in the width direction of the electric actuator, and the reader is installed in the mounting groove.

[0010] In combination with the first aspect, in a possible implementation, a fixing portion is provided on the top of the second mounting bracket toward a side close to the driving member, and the reader is fixedly mounted on the fixing portion and the supporting portion.

[0011] In conjunction with the first aspect, in one possible implementation, the electric actuator further includes a circuit board, the circuit board is fixedly connected to the first mounting bracket and is located on a side of the first mounting bracket facing away from the supporting portion, the reader includes a main body and an extension connected to the main body, the extension extends relative to the main body toward a side close to the circuit board and is electrically connected to the circuit board. In conjunction with the first aspect, in one possible implementation, the electric actuator further includes an elastic member, the elastic member is disposed between the first mounting bracket and the second sliding portion, the elastic member is located at one end of the second sliding portion close to the driving member, and is located on a side of the first sliding portion close to the driving member, and in the sliding direction of the sliding member, the elastic member is spaced apart from the output shaft.

[0012] In combination with the first aspect, in a possible implementation, the electric actuator further includes a guide rail assembly, an adjusting member, a limiting member and a stop member, the limiting member being movably arranged on one side of the first mounting bracket in the width direction of the electric actuator; the stop member being fixedly arranged on the other side of the first mounting bracket in the width direction of the electric actuator, the guide rail assembly being limited to being located between the stop member and the limiting member, and being located on the side of the sliding member close to the driving member, the guide rail assembly including a first guide rail and a second guide rail, the first guide rail being fixedly connected to the first mounting bracket, the second guide rail being fixedly connected to the sliding member, and slidingly cooperating with the first guide rail, the first guide rail and the second guide rail being arranged sequentially along the width direction of the electric actuator, and the adjusting member being used to adjust the gap between the first guide rail and the second guide rail.

[0013] The electric actuator provided by the utility model is based on the provision of a sliding member slidably connected to a mounting base, one end of the sliding member is provided with a rack structure, and the other end of the sliding member is connected to an output shaft. The gear of the drive assembly meshes with the rack structure and is transmission-connected to the drive member. The drive member is mounted on the mounting base and is used to drive the gear to rotate to drive the sliding member and the output shaft to perform linear motion, thereby converting the rotational motion of the gear into linear motion of the sliding member, shortening the transmission stroke of the electric actuator, improving the structural compactness of the electric actuator, and being suitable for miniaturized design. It also improves the mechanical transmission efficiency of the electric actuator, can generate a large thrust, and improves the displacement accuracy of the sliding member. On the other hand, based on the provision of the second sliding portion protruding from the side of the first sliding portion close to the driving member, the connection position of the second sliding portion and the output shaft is increased, thereby improving the connection strength and connection reliability between the second sliding portion and the output shaft. The provision of the first sliding portion and the second sliding portion also makes the overall structure of the sliding member more compact, suitable for miniaturized design of the electric actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the electric actuator provided by an embodiment of the utility model.

[0015] Figure 2 yes Figure 1 A structural schematic diagram of the local structure of the electric actuator from a first perspective.

[0016] Figure 3 yes Figure 2 Exploded view of the partial structure of the electric actuator.

[0017] Figure 4 yes Figure 1 A structural schematic diagram of the local structure of the electric actuator from a second perspective.

[0018] Figure 5 yes Figure 1 A structural schematic diagram from a third perspective of the local structure of the electric actuator.

[0019] Figure 6 yes Figure 5 A cross-sectional view of the local structure of the electric actuator along line AA.

[0020] Key Component Symbols: Electric actuator 100; housing 10; mounting base 20; avoidance groove 201; through-hole 202; first mounting bracket 21; first mounting plate 211; second mounting plate 212; reinforcement structure 213; second mounting bracket 22; mounting groove 2201; fixing portion 221; supporting portion 222; connector 23; connecting cable 30; sliding assembly 40; sliding member 41; movable hole 4101; connecting groove 4102; accommodating groove 4103; first sliding portion 411; Second sliding portion 412; rack structure 42; output shaft 43; drive assembly 50; drive member 51; gear 52; reducer 53; displacement detection member 60; reader 61; main body 611; extension portion 612; scale 62; circuit board 70; elastic member 81; guide rail assembly 82; first guide rail 821; second guide rail 822; locking member 823; adjusting member 84; limiting member 85; stop member 86; length direction X; width direction Y; height direction Z; sliding direction F. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in conjunction with the accompanying drawings.

[0022] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" can be a connection between each other and the relative position relationship after connection remains unchanged. "Rotational connection" can be a connection between each other and can rotate relative to each other after connection. The term "integrally formed" means that in the process of forming one of the multiple components, the component is connected to the other components without the need for further processing (such as bonding, welding, snap connection, screw connection) to connect the two components together. The directional terms mentioned in the embodiments of the present invention, such as "top", "bottom", "inside", "outside", "side", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, 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 therefore cannot be understood as a limitation on the embodiments of the present invention.

[0023] Please also refer to Figure 1 and Figure 2 , Figure 1 1 is a schematic structural diagram of an electric actuator 100 provided in an embodiment of the present utility model; Figure 2 yes Figure 1 A structural schematic diagram of the local structure of the electric actuator 100 from a first perspective. The electric actuator 100 includes a mounting seat 20, a sliding assembly 40, a driving assembly 50 and a displacement detection member 60. The sliding assembly 40 includes a sliding member 41 and an output shaft 43. The sliding member 41 is slidably connected to the mounting seat 20. A rack structure 42 is provided at one end of the sliding member 41. The other end of the sliding member 41 is connected to the output shaft 43. The driving assembly 50 includes a driving member 51 and a gear 52. The gear 52 is engaged with the rack structure 42 and is transmission-connected to the driving member 51. The driving member 51 is mounted on the mounting seat 20 and is used to drive the gear 52 to rotate so as to drive the sliding member 41 and the output shaft 43 to perform linear motion. Among them, the sliding member 41 includes a first sliding portion 411 and a second sliding portion 412. The first sliding portion 411 is extended along the sliding direction F of the sliding member 41. The second sliding portion 412 is protruded from the side of the first sliding portion 411 close to the driving member 51. The output shaft 43 is fixedly connected to the second sliding portion 412 and is located at an end of the second sliding portion 412 facing away from the driving member 51 .

[0024] The electric actuator 100 provided by the present invention is based on a sliding member 41 slidably connected to the mounting seat 20 . A rack structure 42 is provided at one end of the sliding member 41 , and the other end of the sliding member 41 is connected to an output shaft 43 . The gear 52 of the drive assembly 50 meshes with the rack structure 42 and is in transmission connection with the drive member 51. The drive member 51 is mounted on the mounting base 20 and is used to drive the gear 52 to rotate, thereby driving the slider 41 and the output shaft 43 to perform linear motion, thereby converting the rotational motion of the gear 52 into linear motion of the slider 41. This shortens the transmission stroke of the electric actuator 100, improves the structural compactness of the electric actuator 100, and is suitable for miniaturized design. It also improves the mechanical transmission efficiency of the electric actuator 100, can generate a larger thrust, and improves the displacement accuracy of the slider 41. On the other hand, based on the second sliding portion 412 protruding from the side of the first sliding portion 411 close to the drive member 51, the connection position of the second sliding portion 412 and the output shaft 43 is increased, thereby improving the connection strength and connection reliability between the second sliding portion 412 and the output shaft 43. In addition, the provision of the first sliding portion 411 and the second sliding portion 412 can also make the overall structure of the slider 41 more compact, suitable for the miniaturized design of the electric actuator 100.

[0025] For the accuracy of description, please refer to the direction in this article. Figure 2 For reference, the term "sliding direction F" refers to the direction in which the sliding member 41 slides relative to the mounting seat 20, that is, the left-right direction. The term "length direction X" refers to the direction parallel to the sliding direction F of the sliding member 41, that is, the left-right direction (where the positive direction of the X axis is right). The term "width direction Y" refers to the arrangement direction of the sliding member 41 and the displacement detection member 60, that is, the front-to-back direction (where the positive direction of the Y axis is rear). The term "height direction Z" refers to the arrangement direction of the driving member 51 and the gear 52, that is, the up-down direction (where the positive direction of the Z axis is up). Among them, the length direction X, the width direction Y and the height direction Z together constitute the three orthogonal directions of the electric actuator 100. For the convenience of description, the up and down, left and right, and front and back directions in the present utility model are relative positions and do not constitute a limitation to the implementation. The length direction X, width direction Y and height direction Z of the electric actuator 100 can be customized according to the specific structure of the product and the perspective of the drawings, and the present utility model does not make specific limitations.

[0026] It should be noted that Figure 1 The purpose is only to schematically describe the connection method between the mounting base 20, the sliding assembly 40 and the driving assembly 50, and is not to specifically limit the connection position, connection relationship and specific structure of each component. Figure 1The structure of the electric actuator 100 is only shown in the embodiment of the present invention and does not constitute a specific limitation on the electric actuator 100. In other embodiments of the present invention, the electric actuator 100 may include Figure 1 More or fewer components, or combinations of certain components, or different components may be shown. For example, the electric actuator 100 may also include, but is not limited to, an energy storage component and a controller.

[0027] like Figure 1 As shown, the electric actuator 100 also includes a cover 10, which is fixedly connected to the mounting seat 20. The cover 10 covers the sliding assembly 40, the drive assembly 50 and the displacement detection member 60. Specifically, the cover 10 is connected to the mounting seat 20 to form a mounting cavity, and the sliding assembly 40, the drive assembly 50 and the displacement detection member 60 are arranged in the mounting cavity. Therefore, on the one hand, the cover 10 plays the role of resisting impact and vibration, dust and water for the internal parts of the electric actuator 100, and effectively protects the internal parts of the electric actuator 100 from the external environment; on the other hand, the cover 10 can also play a role of supporting and reinforcing the internal parts of the electric actuator 100, thereby improving the working stability and reliability of the electric actuator 100. The electric actuator 100 also includes a connecting cable 30, and the drive member 51 is connected to the battery or external power supply through the connecting cable 30, thereby ensuring that the drive member 51 can output a rotational driving force.

[0028] The driving member 51 is used to provide a rotational driving force, causing the gear 52 to rotate about the rotation axis of the driving member 51. The driving member 51 and the gear 52 are arranged along the height direction Z of the electric actuator 100. The driving assembly 50 also includes a speed reducer 53. The speed reducer 53 is connected between the driving member 51 and the gear 52 to reduce the speed output by the driving member 51 and increase the torque output by the driving member 51, thereby achieving control accuracy and power output of the driving member 51.

[0029] The reducer 53 is fixedly mounted on the second mounting bracket 22 , and the housing of the driving member 51 and the housing of the reducer 53 are fixedly connected, thereby enabling the driving member 51 to be mounted on the second mounting bracket 22 .

[0030] Please also refer to Figure 2 and Figure 3 , Figure 3 yes Figure 2Exploded view of the local structure of the electric actuator 100 in FIG. For example, in this embodiment, the sliding member 41 is roughly L-shaped. The output shaft 43 and the second sliding portion 412 are fixedly connected by a threaded connection, thereby facilitating operations such as assembly, replacement and disassembly of the output shaft 43. The output shaft 43 and the second sliding portion 412 can also be fixedly connected together by welding, bonding, snapping or other connection methods. The first sliding portion 411 is provided with a movable hole 4101. The rack structure 42 is provided in the movable hole 4101. The movable hole 4101 is configured as a long strip hole. The rack structure 42 is provided on one of the groove side walls of the movable hole 4101 extending along the longitudinal direction X of the electric actuator 100, and is spaced apart from the other groove side wall of the movable hole 4101 extending along the longitudinal direction X of the electric actuator 100, thereby improving the reliability and smoothness of the rotation of the gear 52.

[0031] Of course, in some embodiments, the second sliding portion 412 can be omitted, that is, the height of the first sliding portion 411 in the height direction Z of the electric actuator 100 and the height of the second sliding portion 412 in the height direction Z of the electric actuator 100 are approximately the same, and the present invention does not make specific limitations.

[0032] In this embodiment, the mounting base 20 includes a first mounting bracket 21 and a second mounting bracket 22. The first mounting bracket 21 and the second mounting bracket 22 are fixedly connected and arranged along the longitudinal direction X of the electric actuator 100. The driving member 51 is mounted on the first mounting bracket 21.

[0033] The side wall of the second mounting bracket 22 facing the first mounting bracket 21 is provided with an avoidance groove 201 for avoiding the second sliding portion 412. The bottom of the avoidance groove 201 is provided with a through-hole 202, and the output shaft 43 is movably inserted into the through-hole 202. Therefore, on the one hand, because the avoidance groove 201 does not completely penetrate the second bracket, the thickness of the second mounting bracket 22 is increased, thereby improving the strength of the second mounting bracket 22. At the same time, the provision of the avoidance groove can also be used to ensure the sliding range of the sliding member 41, thereby ensuring the extension and retraction range of the output shaft 43, improving the smoothness and reliability of the extension and retraction movement of the output shaft 43 of the electric actuator 100. In some embodiments, the four corners of the avoidance groove 201 are rounded to prevent the sliding member 41 from colliding with the mounting base 20 and causing motion interference.

[0034] The shape of the output shaft 43 matches the shape of the through hole 202, so that the through hole 202 can guide the extension and retraction of the output shaft 43. The first mounting frame 21 and the second mounting frame 22 are detachably connected by a connector 23, thereby facilitating the assembly, maintenance, replacement, and other operations of the various parts of the electric actuator 100. The connector 23 can be, but is not limited to, a bolt, a screw, a snap, or other locking structure. Specifically, the first mounting frame 21 is roughly L-shaped. The first mounting frame 21 includes a first mounting plate 211 and a second mounting plate 212. In the longitudinal direction X of the electric actuator 100, one end of the first mounting plate 211 is fixedly connected to the second mounting plate 212, and the other end of the first mounting plate 211 is fixedly connected to the moving member. The second mounting plate 212 and the driving member 51 are arranged on the same side of the first mounting plate 211. The second mounting plate 212 is fixedly connected to the second mounting frame 22 and is located between the second mounting frame 22 and the driving member 51. The top of the second mounting frame 22 is provided with an escape groove 201 on the side wall facing the first mounting frame 21. The bottom of the second mounting frame 22 is detachably connected to the first mounting frame 21 via a connector 23. Thus, based on the structural arrangement of the first mounting frame 21 and the second mounting frame 22, the layout between the connecting seat and the sliding member 41 and the driving member 51 is more reasonable and compact.

[0035] Please also refer to Figures 2 to 4 , Figure 4 yes Figure 1 A schematic diagram of the structure of the electric actuator 100 from a second perspective is shown. In this embodiment, a support portion 222 is provided at the bottom of the second mounting frame 22, toward the side closest to the driver 51. The support portion 222 is fixedly connected to the first mounting frame 21 and is used to support the second sliding portion 412. Thus, the support portion 222 can support the sliding member 41, thereby improving the reliability and stability of the sliding member 41's movement relative to the mounting base 20 and ensuring the reliability and stability of the output shaft 43's telescopic movement.

[0036] In some embodiments, the electric actuator 100 further includes a displacement detecting member 60. The displacement detecting member 60 is disposed at one end of the sliding member 41 away from the driving assembly 50. The displacement detecting member 60 is used to detect the sliding distance of the sliding member 41. Specifically, in the length direction X of the electric actuator 100, the displacement detecting member 60 is disposed at one end of the sliding member 41, and the driving assembly 50 is disposed at the other end of the sliding member 41. The length direction X of the electric actuator 100 is parallel to the sliding direction F of the sliding member 41. Thus, based on the displacement detecting member 60 being disposed at the side of the sliding member 41 away from the driving assembly 50 in the length direction X of the electric actuator 100, the structural compactness of the electric actuator 100 is improved, and the detection accuracy of the displacement detecting member 60 is improved.

[0037] Specifically, the displacement detector 60 is positioned proximate to the second sliding portion 412 and arranged along the width direction Y of the electric actuator 100. The width direction Y of the electric actuator 100 is perpendicular to the length direction X and the height direction Z of the electric actuator 100. The height direction Z of the electric actuator 100 corresponds to the arrangement direction of the driving member 51 and the gear 52. Therefore, by positioning the displacement detector 60 proximate to the second sliding portion 412, the layout between the displacement detector 60, the mounting base 20, and the sliding member 41 is more rational and compact. Furthermore, optimizing the installation position of the displacement detector 60 can also improve the accuracy and reliability of the displacement detection results.

[0038] For example, in this embodiment, the displacement detection member 60 is configured as a linear encoder. Specifically, the displacement detection member 60 includes a reader 61 and a scale 62. The reader 61 is fixedly connected to the second mounting bracket 22 of the mounting seat 20. The scale 62 is fixedly connected to the second sliding portion 412 and is located on the side of the second sliding portion 412 close to the reader 61. The scale 62 can follow the second sliding portion 412 to extend into the avoidance groove 201 and is arranged to avoid the avoidance groove 201. As a result, the displacement detection member 60 can provide high-resolution and high-precision displacement measurement, thereby enabling the electric actuator 100 to accurately control the extension and contraction amount of the output shaft 43. Specifically, a photoelectric element is provided in the reader 61, and an identification structure that is recognized by the photoelectric element is provided on the scale 62. The identification structure is, for example, a transparent stripe. As a result, the photoelectric element inside the reader 61 scans the transparent stripes on the scale 62, converts the transparent and opaque stripes into signals, converts the signals into digital data form, and finally further processes the signals through the controller to obtain the actual displacement value. Of course, in some other embodiments, the displacement detection element 60 may also be configured as, but not limited to, a laser sensor, an optical sensor, a capacitive sensor, and the like.

[0039] In some embodiments, the reader 61 is mounted on the support portion 222. Specifically, a mounting slot 2201 is provided on the sidewall of the support portion 222 in the width direction Y of the electric actuator 100, and the reader 61 is mounted within the mounting slot 2201. Thus, the mounting slot 2201 not only facilitates positioning of the reader 61 during assembly, but also improves assembly efficiency and yield of the reader 61. Furthermore, the reader 61 is concealed within the mounting slot 2201, and the walls of the mounting slot 2201 support the reader 61, thereby preventing interference between the reader 61 and other components and improving the accuracy of the detection results of the displacement detector 60.

[0040] In some other embodiments, a fixing portion 221 is provided on the top of the second mounting frame 22, toward the side closer to the driving member 51. The read head 61 is fixedly mounted on the fixing portion 221 and the supporting portion 222. Specifically, in the height direction Z of the electric actuator 100, one end of the read head 61 is mounted on the fixing portion 221, and the other end of the read head 61 is mounted on the supporting portion 222, thereby improving the reliability and stability of the connection between the read head 61 and the second mounting frame 22. The fixing portion 221 is located at the edge of the first mounting frame 21 near the avoidance groove 201, thereby shortening the distance between the read head 61 and the scale 62, thereby improving the detection precision and accuracy of the displacement detection member 60.

[0041] The fixing portion 221 and the supporting portion 222 are spaced apart from each other, thereby avoiding interference between the scale 62 and the fixing portion 221. In this embodiment, the fixing portion 221 is fixedly connected to the cover 10. Therefore, the setting of the fixing portion 221 can also provide an installation site for the cover 10, facilitate installation, and improve the safety, positioning accuracy and processing accuracy of the electric actuator 100. Specifically, there are two fixing portions 221, and the two fixing portions 221 are arranged at the edge of the first mounting frame 21 near the avoidance groove 201. One of the fixing portions 221 is used to be fixedly connected to the reader 61 and the cover 10, and the other fixing portion 221 is fixedly connected to the cover 10. It should be noted that the number of the fixing portions 221 is not specifically limited in the present invention. For example, the fixing portion 221 can also be set to one, and the fixing portion 221 is extended along the edge of the avoidance groove 201, thereby avoiding interference with the scale 62 and the second sliding portion 412. In some embodiments, the fixing portion 221 and / or the supporting portion 222 may be omitted, which is not specifically limited in the embodiments of the present invention.

[0042] For example, in this embodiment, the fixing portion 221 and the supporting portion 222 are each provided with a mounting groove 2201. One end of the reader 61 is mounted in the mounting groove 2201 provided in the fixing portion 221, and the other end of the reader 61 is mounted in the mounting groove 2201 provided in the supporting portion 222. This improves the precise assembly of the reader 61 with the second mounting bracket 22. It will be appreciated that the scale 62 is fixedly connected to the second sliding portion 412, so that the scale 62 can follow the second sliding portion 412 to extend into or out of the avoidance groove 201, thereby preventing interference between the scale 62 and the guide rail assembly 82, the second mounting bracket 22, and other structures, and further enhancing the overall structure of the electric actuator 100. Of course, in other embodiments, only one of the fixing portion 221 or the supporting portion 222 is provided with the mounting groove 2201, or neither the fixing portion 221 or the supporting portion 222 is provided with the mounting groove 2201.

[0043] In this embodiment, the electric actuator 100 also includes a circuit board 70, which is fixedly connected to the first mounting bracket 21 and is located on the side of the first mounting bracket 21 facing away from the supporting portion 222. The reader 61 includes a main body 611 and an extension portion 612 connected to the main body 611. The extension portion 612 extends relative to the main body 611 toward a side close to the circuit board 70 and is electrically connected to the circuit board 70. Therefore, based on the circuit board 70 being installed on the side of the first mounting frame 21 facing away from the second mounting frame 22, the connection distance between the circuit board 70 and the driving member 51 is shortened, the crosstalk and mutual inductance of the circuit are reduced, thereby improving the response speed of the circuit and the quality of signal transmission, and optimizing the layout position of the circuit board 70, improving the space utilization, and making the overall structure of the electric actuator 100 more compact; on the other hand, based on the extension portion 612 of the reader 61 being extended relative to the main body 611 toward the side close to the circuit board 70, the connection distance between the reader 61 and the circuit board 70 is shortened, the crosstalk and mutual inductance of the circuit are reduced, thereby improving the response speed of the circuit and the quality of signal transmission.

[0044] In some embodiments, the electric actuator 100 further includes a guide rail assembly 82, an adjustment member 84, a limiter 85, and a stopper 86. The limiter 85 is movably disposed on one side of the first mounting bracket 21 in the width direction Y of the electric actuator 100; the stopper 86 is fixedly disposed on the other side of the first mounting bracket 21 in the width direction Y of the electric actuator 100. The guide rail assembly 82 is located between the stopper 86 and the limiter 85 and on the side of the sliding member 41 that is closer to the driving member 51.

[0045] The guide rail assembly 82 includes a first guide rail 821 and a second guide rail 822. The first guide rail 821 is fixedly connected to the first mounting bracket 21 of the mounting seat 20, and the second guide rail 822 is fixedly connected to the sliding member 41 and slides with the first guide rail 821. The first guide rail 821 and the second guide rail 822 are arranged in sequence along the width direction Y of the electric actuator 100. The adjustment member 84 is used to adjust the gap between the first guide rail 821 and the second guide rail 822. In this way, the problem of unstable guidance of the sliding member 41 by the guide rail assembly 82 due to the increase in the gap between the first guide rail 821 and the second guide rail 822 after long-term use of the electric actuator 100 is avoided, the reliability and accuracy of the guide rail assembly 82 in guiding the sliding of the sliding member 41 are improved, the reliability and stability of the sliding movement of the sliding member 41 are improved, and the detection accuracy of the displacement detection member 60 is improved.

[0046] In this embodiment, the guide rail assembly 82 further includes a locking member 823. The first guide rail 821 is fixedly connected to the mounting base 20 via the locking member 823, and the second guide rail 822 is also fixedly connected to the sliding member 41 via the locking member 823. Specifically, the first guide rail 821 is fixedly connected to the first mounting bracket 21 via the locking member 823. It is understandable that after long-term use of the electric actuator 100, the locking member 823 between the first guide rail 821 and the first mounting bracket 21 and / or the locking member 823 between the second guide rail 822 and the sliding member 41 will become loose, thereby causing the gap between the first guide rail 821 and the second guide rail 822 to increase, resulting in unstable guidance of the sliding member 41 by the guide rail assembly 82. The embodiment of the utility model can adjust the gap between the first guide rail 821 and the second guide rail 822 by operating the adjustment member 84, thereby improving the reliability and accuracy of the guide rail assembly 82 in guiding the sliding of the sliding member 41, improving the reliability and stability of the sliding movement of the sliding member 41, and improving the detection accuracy of the displacement detection member 60.

[0047] The locking member 823 can be, but is not limited to, a bolt, a screw or other locking structure. In this way, the guide rail assembly 82 guides the sliding of the sliding member 41, improves the reliability and stability of the sliding movement of the sliding member 41, and improves the detection accuracy of the displacement detection member 60. Specifically, in this embodiment, two first guide rails 821 are provided, and one second guide rail 822 is provided, and the second guide rail 822 is provided between the first guide rails 821, thereby improving the stability of the sliding of the sliding member 41 relative to the mounting seat 20. It should be noted that the number of the first guide rails 821 and the number of the second guide rails 822 can be designed according to actual conditions, and the present utility model does not make specific restrictions. For example, the number of the first guide rails 821 and the number of the second guide rails 822 are each one.

[0048] Please also refer to Figure 5 and Figure 6 , Figure 5 yes Figure 1 A structural diagram of a local structure of the electric actuator 100 from a third perspective; Figure 6 yes Figure 5A cross-sectional view of the partial structure of the electric actuator 100 along line AA is shown in FIG. In some embodiments, the electric actuator 100 further includes an elastic member 81. The elastic member 81 is disposed between the first mounting bracket 21 and the second sliding portion 412. The elastic member 81 is located at an end of the second sliding portion 412 that is close to the driver 51, and is located on a side of the first sliding portion 411 that is close to the driver 51. In the sliding direction F of the sliding member 41, the elastic member 81 is spaced apart from the output shaft 43. Specifically, in the sliding direction F of the sliding member 41, the elastic member 81 and the output shaft 43 are located on opposite sides of the second sliding portion 412. Thus, on the one hand, the elastic member 81 can act as a buffer, thereby ensuring that the second mounting bracket 22 limits the second sliding portion 412 and preventing damage to the sliding portion 41 and the mounting base 20 due to stress concentration, thereby extending the service life of the electric actuator 100. On the other hand, based on the spacing between the elastic member 81 and the output shaft 43 in the sliding direction F of the sliding member 41, interference between the elastic member 81 and the output shaft 43 is avoided. In some embodiments, the orthographic projection of the elastic member 81 on the second sliding portion 412 at least partially overlaps with the orthographic projection of the output shaft 43 on the second sliding portion 412, thereby improving the structural compactness of the electric actuator 100 and making it suitable for miniaturized design.

[0049] In some embodiments, the first mounting frame 21 and / or the second sliding portion 412 are provided with a receiving groove 4103, within which the elastic member 81 is disposed. This makes the overall structure of the electric actuator 100 more compact and ensures that the second mounting frame 22 retains the second sliding portion 412. For example, in this embodiment, a connecting groove 4102 for connecting to the output shaft 43 is provided on the side of the second sliding portion 412 facing away from the first sliding portion 411. The first mounting frame 21 and the second sliding portion 412 each have a receiving groove 4103 for accommodating the elastic member 81. The receiving groove 4103 and the connecting groove 4102 are separated from each other to prevent interference between the elastic member 81 and the output shaft 43. Specifically, the first mounting plate 211 of the first mounting frame 21 is provided with the receiving groove 4103. The first mounting frame 21 also includes a reinforcement structure 213. The reinforcement structure 213 is disposed at the corner between the first and second mounting plates 211, 212, thereby enhancing the overall structural strength of the first mounting frame 21. The elastic member 81 may be, but is not limited to, a spring, a spring sheet, an elastic body or other elastic structures. In this embodiment, the elastic member 81 is configured as a spring.

[0050] The above description is merely a specific implementation of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An electric actuator, characterized in that: include: Mounting seat; A sliding assembly, the sliding assembly comprising a sliding member and an output shaft, the sliding member being slidably connected to the mounting seat, one end of the sliding member being provided with a rack structure, and the other end of the sliding member being connected to the output shaft; a drive assembly comprising a drive member and a gear, the gear meshing with the rack structure and connected to the drive member, the drive member being mounted on the mounting seat and configured to drive the gear to rotate so as to drive the sliding member and the output shaft to perform linear motion; In which, the sliding member includes a first sliding part and a second sliding part, the first sliding part is extended along the sliding direction of the sliding member, the second sliding part is protruded on the side of the first sliding part close to the driving member, and the output shaft is fixedly connected to the second sliding part and is located at the end of the second sliding part facing away from the driving member.

2. The electric actuator according to claim 1, characterized in that: The mounting base includes a first mounting bracket and a second mounting bracket. The first mounting bracket is fixedly connected to the second mounting bracket and arranged along the length direction of the electric actuator. The driving member is mounted on the first mounting bracket.

3. The electric actuator according to claim 2, characterized in that: The side wall of the second mounting frame facing the first mounting frame is provided with an avoidance groove for avoiding the second sliding part, the bottom of the avoidance groove is provided with a through hole, the output shaft is movably arranged in the through hole, and the bottom of the second mounting frame is provided with a supporting part facing the side close to the driving member, the supporting part is fixedly connected to the first mounting frame, and is used to support the second sliding part.

4. The electric actuator according to claim 3, characterized in that: The electric actuator also includes a displacement detection member, which is arranged close to the second sliding portion and arranged together with the second sliding portion in the width direction of the electric actuator. The displacement detection member is used to detect the sliding distance of the sliding portion. The width direction of the electric actuator is perpendicular to the length direction of the electric actuator and the height direction of the electric actuator.

5. The electric actuator according to claim 4, characterized in that: The displacement detection component includes a reader and a ruler. The reader is fixedly connected to the second mounting bracket. The ruler is fixedly connected to the second sliding part and is located on the side of the second sliding part close to the reader. The ruler can follow the second sliding part into the avoidance groove and be arranged to avoid the avoidance groove.

6. The electric actuator according to claim 5, characterized in that: The side wall of the supporting portion in the width direction of the electric actuator is provided with an installation groove, and the reader is installed in the installation groove.

7. The electric actuator according to claim 5, characterized in that: A fixing portion is provided on the top of the second mounting bracket toward a side close to the driving member, and the reader is fixedly mounted on the fixing portion and the supporting portion.

8. The electric actuator according to claim 6, characterized in that: The electric actuator also includes a circuit board, which is fixedly connected to the first mounting bracket and is located on the side of the first mounting bracket facing away from the supporting portion. The reader includes a main body and an extension connected to the main body. The extension extends relative to the main body toward a side close to the circuit board and is electrically connected to the circuit board.

9. The electric actuator according to claim 2, characterized in that: The electric actuator also includes an elastic member, which is arranged between the first mounting bracket and the second sliding part. The elastic member is located at one end of the second sliding part close to the driving member and is located on a side of the first sliding part close to the driving member. In the sliding direction of the sliding member, the elastic member is spaced apart from the output shaft.

10. The electric actuator according to claim 2, characterized in that: The electric actuator also includes a guide rail assembly, an adjusting member, a limit member and a stop member, the limit member is movably arranged on one side of the first mounting bracket in the width direction of the electric actuator; the stop member is fixedly arranged on the other side of the first mounting bracket in the width direction of the electric actuator, the guide rail assembly is located between the stop member and the limit member, and is located on the side of the sliding member close to the driving member, the guide rail assembly includes a first guide rail and a second guide rail, the first guide rail is fixedly connected to the first mounting bracket, the second guide rail is fixedly connected to the sliding member, and slides with the first guide rail, the first guide rail and the second guide rail are arranged in sequence along the width direction of the electric actuator, and the adjusting member is used to adjust the gap between the first guide rail and the second guide rail.

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