Electric actuating mechanism

Abstract

The utility model relates to the technical field of coating machine accessories, and discloses an electric actuating mechanism which comprises a shell. The rotating shaft is rotatably arranged in the shell; the driving assembly is in driving connection with the rotating shaft and used for driving the rotating shaft to rotate; the output shaft coaxially sleeves the rotating shaft and is in threaded fit with the rotating shaft; the output shaft is in sliding connection with the shell in the axial direction and used for being driven by the rotating shaft to do linear motion. The first detection piece is arranged in the shell and is used for detecting the rotation angle of the rotating shaft; and the second detection piece is arranged in the shell, is in communication connection with the first detection piece and is used for detecting the displacement of the output shaft. The problems that an adjusting mechanism on an existing coating die head is poor in adjusting precision, the uniformity of the density of a coating surface is affected, and then the coating quality is affected are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coating machine accessories, and specifically relates to an electric actuator. BACKGROUND

[0002] As a kind of precision wet coating technology, the working principle of slit extrusion coating is that slurry is extruded and sprayed along the slit of coating die under certain pressure and flow and transferred to substrate.

[0003] In related art, to adjust the density of coating surface of coating die and ensure the uniformity of coating surface density, multiple T blocks are arranged on the coating die, and the height of T block inserted into slit is adjusted by adjusting mechanism to adjust the density of coating surface, however, the adjusting precision of existing adjusting mechanism is poor, which affects the uniformity of coating surface density and further affects coating quality. UTILITARY MODEL CONTENTS

[0004] Therefore, the utility model provides an electric actuator to solve the problem of poor adjusting precision of adjusting mechanism on existing coating die, which affects the uniformity of coating surface density and further affects coating quality.

[0005] In the first aspect, the utility model provides an electric actuator, comprising:

[0006] Housing;

[0007] Rotary shaft, rotatably arranged in the housing;

[0008] Drive assembly, drivingly connected with the rotary shaft, for driving the rotary shaft to rotate;

[0009] Output shaft, coaxially sleeved on the rotary shaft, and threadedly matched with the rotary shaft;The output shaft is slidably connected with the housing along its axial direction, for being driven by the rotary shaft to do linear motion;

[0010] First detection part, arranged in the housing, for detecting the rotation angle of the rotary shaft;

[0011] Second detection part, arranged in the housing, and communicatively connected with the first detection part, for detecting the displacement of the output shaft.

[0012] The rotating shaft is driven to rotate by the driving assembly, the rotating shaft drives the output shaft to move linearly along the axial direction due to the threaded cooperation between the rotating shaft and the output shaft, the rotating movement of the rotating shaft is converted into the linear movement of the output shaft, the rotating angle of the rotating shaft is detected by the first detection member, the actual displacement of the output shaft when being driven by the rotating shaft is detected by the second detection member, thus the deviation between the theoretical value and the actual value of the linear movement of the output shaft driven by the rotating shaft can be determined, the deviation is adjusted according to the deviation, the deviation between the theoretical value and the actual value of the linear movement of the output shaft is effectively reduced, and thus the control accuracy is improved; the application can be applied to the technical field of coating die, is used for driving the T block on the coating die to adjust the slit area density, improves the adjustment accuracy, and ensures the coating quality.

[0013] In an optional implementation, the driving assembly comprises a driving motor; the first detection member is arranged on the driving motor and is used for detecting the rotating information of a motor shaft of the driving motor. The rotating information of the motor shaft of the driving motor is detected by the first detection member, and the rotating angle of the rotating shaft is obtained.

[0014] In an optional implementation, the first detection member is a magnetic encoder. The rotating angle of the motor shaft is detected by the magnetic encoder, and the rotating angle of the rotating shaft is obtained, so that the detection accuracy is improved.

[0015] In an optional implementation, the driving motor is located at the side of the rotating shaft, the motor shaft is arranged in parallel with the rotating shaft, and the motor shaft is drivingly connected to the rotating shaft through a transmission assembly. The driving motor is arranged at the side of the rotating shaft, the motor shaft is arranged in parallel with the rotating shaft, and the transmission assembly is used for drivingly connecting the motor shaft to the rotating shaft, so that the driving assembly can be arranged at the same height as the rotating shaft, the size of the whole in the length direction of the rotating shaft is reduced, the size of the whole is reduced, the space limitation is reduced when the application is applied to an external device, and the space utilization is improved.

[0016] In an optional implementation, the transmission assembly comprises a transmission shaft and a gear transmission member; one end of the transmission shaft is coaxially connected to the rotating shaft through a shaft coupling, and the other end of the transmission shaft is drivingly connected to the motor shaft through the gear transmission member. The driving force of the motor shaft is transmitted to the rotating shaft through the transmission shaft and the gear transmission member, the integrated structure of the transmission shaft and the gear transmission member is matched with the parallel arrangement of the motor shaft and the rotating shaft, the length of the shell is reduced, the size is reduced, and the stability during transmission is improved through the shaft coupling.

[0017] In an alternative embodiment, the second detection member comprises a magnetic grid displacement sensor and a magnetic grid plate, the magnetic grid displacement sensor is connected with the output shaft; the magnetic grid plate is connected with the shell, and the magnetic grid plate is connected in communication with the first detection member, for cooperating with the magnetic grid displacement sensor to detect the displacement of the output shaft. The second detection member cooperates with the magnetic grid displacement sensor and the magnetic grid plate to move together when the output shaft moves, and then feeds back to the second detection member through the magnetic grid plate to detect the actual deviation and improve the accuracy of control.

[0018] In an alternative embodiment, a guide rail is arranged on the output shaft, and a sliding block is arranged in the shell, and the guide rail and the sliding block are in sliding fit along the axial direction of the output shaft. The guide rail and the sliding block are in fit, so that the output shaft moves linearly, and the stability is improved.

[0019] In an alternative embodiment, the rotating shaft is arranged in the shell through a bearing assembly. The bearing assembly improves the bearing capacity of the rotating shaft and facilitates the rotation of the rotating shaft.

[0020] In an alternative embodiment, the bearing assembly comprises two thrust bearings arranged in the axial direction of the rotating shaft and sleeved on the rotating shaft, and a first limiting portion and a second limiting portion are arranged on the rotating shaft in the axial direction; the two thrust bearings are located between the first limiting portion and the second limiting portion, and the shaft rings of the two thrust bearings abut against the first limiting portion and the second limiting portion, respectively. By arranging two thrust bearings, the axial load is borne in two directions by cooperating with the first limiting portion and the second limiting portion, respectively, the bearing capacity is improved, the thrust and pull force of the output shaft is improved, the shaft is prevented from being stuck during operation, the rotating shaft is positioned, and stable output is ensured.

[0021] In an alternative embodiment, the bearing assembly further comprises a deep groove ball bearing, the deep groove ball bearing is sleeved on the rotating shaft and located between the two thrust bearings. The deep groove ball bearing bears the radial load of the rotating shaft, improves the bearing capacity, and improves the smoothness of the rotation of the rotating shaft to ensure the output accuracy.

[0022] In an alternative embodiment, the second limiting portion is a snap spring. The second limiting portion adopts a snap spring, which is convenient for installation and disassembly.

[0023] In an alternative embodiment, the output shaft is provided with a mounting groove at one end away from the rotating shaft; the mounting groove is coaxial with the output shaft and is used to fit a T-shaped block; the output shaft is provided with at least one threaded hole on the side corresponding to the mounting groove, and the threaded hole is used to fix the T-shaped block by a jackscrew. By connecting the T-shaped block through the mounting groove, the T-shaped block in the coating die can be controlled; when installed, one end of the T-shaped block is inserted into the mounting groove, and the T-shaped block is locked by screwing the jackscrew with the threaded hole, so that the installation is simple and fast, and T-shaped blocks of various lengths and sizes can be fitted. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0025] Figure 1 It is a front view of the electric actuator of the utility model embodiment;

[0026] Figure 2 It is Figure 1 A-A section view of;

[0027] Figure 3 It is Figure 1 The section view of the electric actuator connected T-shaped block shown in;

[0028] Explanation of reference signs:

[0029] 1, shell;2, rotating shaft;3, output shaft;4, first detection part;5, second detection part;51, magnetic grid displacement sensor;52, magnetic grid plate;6, driving motor;7, transmission shaft;8, gear transmission part;9, shaft coupling;10, guide rail;11, sliding block;12, thrust bearing;13, first limit part;14, second limit part;15, deep groove ball bearing;16, T-shaped block;17, threaded hole;18, jackscrew;19, control board;20, driving board. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creating creative labor belong to the protection scope of the utility model.

[0031] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the utility model, it needs to explain, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0033] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0034] The embodiments of the utility model are described below in combination with Figures 1 to 3 .

[0035] According to the embodiments of the utility model, an electric actuator is provided, which comprises: a shell 1; a rotating shaft 2 rotatably arranged in the shell 1; a driving assembly drivingly connected with the rotating shaft 2, used for driving the rotating shaft 2 to rotate; an output shaft 3 coaxially sleeved on the rotating shaft 2 and threadedly matched with the rotating shaft 2; the output shaft 3 is slidingly connected with the shell 1 along its axial direction, used for being driven by the rotating shaft 2 to move linearly; a first detection member 4 arranged in the shell 1, used for detecting the rotation angle of the rotating shaft 2; a second detection member 5 arranged in the shell 1 and communicatively connected with the first detection member 4, used for detecting the displacement of the output shaft 3.

[0036] It should be noted that the end of the output shaft 3 away from the rotating shaft 2 protrudes out of the shell 1, so as to connect other components for work.

[0037] Communication connection refers to the communication between the connected devices through the transmission of signals, including wired connection (such as connection through wire, network cable, etc.) and wireless connection (such as WiFi, 4g connection, etc.).

[0038] In the embodiment, the rotating shaft 2 is driven to rotate by the driving assembly, and the rotating shaft 2 drives the output shaft 3 to move linearly along the axial direction of the output shaft 3 due to the threaded cooperation between the rotating shaft 2 and the output shaft 3. The rotating movement of the rotating shaft 2 is converted into the linear movement of the output shaft 3. Meanwhile, the rotating angle of the rotating shaft 2 is detected by the first detection member 4, and the actual displacement of the output shaft 3 when driven by the rotating shaft 2 is detected by the second detection member 5. Thus, the deviation between the theoretical value and the actual value of the linear movement of the output shaft 3 driven by the rotating shaft 2 can be determined, and the deviation is adjusted according to the deviation, so as to effectively reduce the deviation between the theoretical value and the actual value of the linear movement of the output shaft 3, thereby improving the control accuracy. The application can be applied to the technical field of coating die, and is used for driving the T block 16 on the coating die to adjust the slit area density and improve the adjustment accuracy, so as to ensure the coating quality.

[0039] In one embodiment, as shown in Figure 2 and Figure 3 , the driving assembly comprises a driving motor 6. The first detection member 4 is arranged on the driving motor 6 and is used for detecting the rotating information of the motor shaft of the driving motor 6. The rotating information of the motor shaft of the driving motor 6 is detected by the first detection member 4, and then the rotating angle of the rotating shaft 2 is obtained. Specifically, the first detection member 4 can be arranged on the non-motor shaft side of the driving motor 6, so as to avoid affecting the working of the motor shaft.

[0040] Specifically, as shown in Figure 2 and Figure 3 , the application further comprises a control board 19 connected with an external power supply to provide power. The driving assembly further comprises a driving board 20 connected with the driving motor 6 by plug-in wiring. The first detection member 4, the second detection member 5 and the driving board 20 are all in communication connection with the control board 19, and are in mutual communication connection and controlled to work by the control board 19.

[0041] In one embodiment, as shown in Figure 2 and Figure 3 , the first detection member 4 is a magnetic encoder.

[0042] In the embodiment, the magnetic encoder is used to detect the rotating angle of the motor shaft, and then the rotating angle of the rotating shaft 2 is obtained, so as to improve the detection accuracy.

[0043] In one embodiment, as shown in Figure 2 and Figure 3 , the driving motor 6 is located on the circumferential side of the rotating shaft 2, and the motor shaft is arranged in parallel with the rotating shaft 2 and is drivingly connected with the rotating shaft 2 through a transmission assembly.

[0044] In the embodiment, as shown in Figure 2 and Figure 3As shown, by setting the driving motor 6 at the side of the rotating shaft 2, and keeping the motor shaft parallel to the rotating shaft 2, and drivingly connecting the transmission assembly with the rotating shaft 2, the driving assembly can be arranged at the same height with the rotating shaft 2, thereby reducing the size of the whole in the length direction of the rotating shaft 2, reducing the overall size, so that when applied to external equipment, the space limitation is reduced, and the space utilization is improved.

[0045] In one embodiment, as shown in Figure 2 and Figure 3 , the transmission assembly comprises a transmission shaft 7 and a gear transmission 8; one end of the transmission shaft 7 is coaxially connected with the rotating shaft 2 through a shaft coupling 9, and the other end is drivingly connected with the motor shaft through the gear transmission 8.

[0046] In this embodiment, as shown in Figure 2 and Figure 3 , by using the transmission shaft 7 and the gear transmission 8 to transmit the driving force of the motor shaft to the rotating shaft 2, and the integrated structure of the gear transmission 8 is matched with the parallel arrangement of the motor shaft and the rotating shaft 2, the length of the shell 1 is reduced to reduce the size, and the stability during transmission is improved through the shaft coupling 9.

[0047] In one embodiment, as shown in Figure 2 and Figure 3 , the second detection member 5 comprises a magnetic grid displacement sensor 51 and a magnetic grid plate 52, and the magnetic grid displacement sensor 51 is connected with the output shaft 3; the magnetic grid plate 52 is connected with the shell 1, and the magnetic grid plate 52 is communicatively connected with the first detection member 4, for cooperating with the magnetic grid displacement sensor 51 to detect the displacement of the output shaft 3.

[0048] In this embodiment, as shown in Figure 2 and Figure 3 , the second detection member 5 cooperates with the magnetic grid displacement sensor 51 and the magnetic grid plate 52, which moves together with the magnetic grid sensor when the output shaft 3 moves, and then feeds back to the second detection member 5 through the magnetic grid plate 52 to detect the actual deviation and improve the accuracy of control.

[0049] In one embodiment, as shown in Figure 2 and Figure 3 , the output shaft 3 is provided with a guide rail 10, and the shell 1 is provided with a sliding block 11, and the guide rail 10 and the sliding block 11 are slidingly matched along the axial direction of the output shaft 3.

[0050] In this embodiment, the guide rail 10 and the sliding block 11 cooperate to make the output shaft 3 move linearly, improving the stability.

[0051] In one embodiment, as shown in Figure 2 and Figure 3 , the rotating shaft 2 is rotatably arranged in the shell 1 through a bearing assembly.

[0052] In the embodiment, the bearing assembly improves the carrying capacity of the rotating shaft 2 and facilitates rotation of the rotating shaft 2.

[0053] In one embodiment, as shown in Figure 2 and Figure 3 , the bearing assembly comprises two thrust bearings 12 arranged along the axial direction of the rotating shaft 2, and the two thrust bearings 12 are sleeved on the rotating shaft 2; the rotating shaft 2 is provided with a first limiting portion 13 and a second limiting portion 14 along the axial direction thereof; the two thrust bearings 12 are located between the first limiting portion 13 and the second limiting portion 14, and the shaft rings of the two thrust bearings 12 abut against the first limiting portion 13 and the second limiting portion 14, respectively.

[0054] In the embodiment, the two thrust bearings 12 are arranged to bear the axial load of the first limiting portion 13 and the second limiting portion 14 in two directions, respectively, thereby improving the carrying capacity, further improving the thrust and pull force of the output shaft 3, avoiding jamming during operation, and positioning the rotating shaft 2 to ensure stable output; when the bearing assembly is applied to control the movement of the T block 16, the thrust and pull force is improved to avoid jamming of the T block 16 during movement.

[0055] In one embodiment, as shown in Figure 2 and Figure 3 , the bearing assembly further comprises a deep groove ball bearing 15; the deep groove ball bearing 15 is sleeved on the rotating shaft 2 and located between the two thrust bearings 12.

[0056] In the embodiment, the deep groove ball bearing 15 is arranged to bear the radial load of the rotating shaft 2, thereby improving the bearing capacity and the smoothness of rotation of the rotating shaft 2 to ensure the output accuracy.

[0057] In one embodiment, as shown in Figure 2 and Figure 3 , the second limiting portion 14 is a snap spring.

[0058] In the embodiment, the second limiting portion 14 is a snap spring, which facilitates installation and disassembly.

[0059] In one embodiment, as shown in Figure 2 , the end of the output shaft 3 away from the rotating shaft 2 is provided with a mounting groove; the mounting groove is coaxial with the output shaft 3 and is used to fit the T block 16; the side of the output shaft 3 corresponding to the mounting groove is provided with at least one threaded hole 17, and the threaded hole 17 is used to fix the T block 16 through a jack 18.

[0060] In the embodiment, the T-shaped block 16 is connected by the installation groove, which can be applied to the connection of the T-shaped block 16 in the coating die. When installing, one end of the T-shaped block 16 is inserted into the installation groove, and the T-shaped block 16 is locked by the threaded hole 17 and the top wire 18 in threaded cooperation. The installation mode is simple and fast, and can be adapted to T-shaped blocks 16 of various lengths and sizes.

[0061] Specifically, as shown in the figure, Figure 3 Figure 2 Figure 3 Figures 1 to 3 Figure 1 The shell 1 includes multiple sections of sub-shells connected in sequence along the length direction. The multiple sections of the shell 1 facilitate installation and disassembly. Preferably, the sub-shells are provided with five sections.

[0062] The specific working principle of the electric actuator provided in the embodiment is as follows: applied to the technical field of coating dies, the T-shaped block 16 is installed by the installation groove of the output shaft 3 and the top wire 18. When it is necessary to drive the T-shaped block 16 to move to adjust the slit area density, the control board 19 sends a signal to the driving board 20. The driving board 20 controls the rotation of the motor shaft of the driving motor 6. Then, the motor shaft drives the transmission shaft 7 and the rotating shaft 2 to rotate through the gear transmission member 8, and then drives the output shaft 3 to move along the axial direction. In this process, the control board 19 calculates the actual deviation and adjusts according to the deviation by the feedback of the rotation angle of the rotating shaft 2 by the magnetic encoder and the actual displacement of the output shaft 3 moved by the magnetic grid sensor and the magnetic grid plate 52. The control board 19 calculates the actual deviation and adjusts according to the deviation. The output shaft 3 drives the T-shaped block 16 to move a predetermined displacement, ensures the control accuracy, ensures the accuracy of the adjustment of the slit area density, improves the coating quality, and the overall arrangement structure is compact, the overall size is small, and the space utilization rate is improved, so as to facilitate installation and use. The adjustment mechanism of the existing coating die has poor adjustment accuracy, which affects the uniformity of the coating area density, and further affects the coating quality.

[0063] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An electric actuator, characterized in that The utility model relates to a rotary shaft displacement sensor, including: A shell (1); A rotating shaft (2) rotatably arranged in the shell (1); A drive assembly drivingly connected with the rotating shaft (2) for driving the rotating shaft (2) to rotate; An output shaft (3) coaxially sleeved on the rotating shaft (2) and threadedly matched with the rotating shaft (2); The output shaft (3) is slidably connected with the shell (1) along the axial direction thereof for being driven by the rotating shaft (2) to move linearly; A first detection member (4) arranged in the shell (1) for detecting the rotation angle of the rotating shaft (2); A second detection member (5) arranged in the shell (1) and communicatively connected with the first detection member (4) for detecting the displacement of the output shaft (3).

2. The electric actuator according to claim 1, characterized in that The drive assembly includes a drive motor (6); The first detection member (4) is arranged on the drive motor (6) for detecting the rotation information of the motor shaft of the drive motor (6).

3. The electric actuator of claim 2, wherein, The first detection member (4) is a magnetic encoder.

4. The electric actuator of claim 2 wherein, The drive motor (6) is located on the side of the rotating shaft (2), and the motor shaft is arranged in parallel with the rotating shaft (2), and the motor shaft is drivingly connected with the rotating shaft (2) through a transmission assembly.

5. The electric actuator of claim 4 wherein, The transmission assembly includes a transmission shaft (7) and a gear transmission member (8); One end of the transmission shaft (7) is coaxially connected with the rotating shaft (2) through a shaft coupling (9), and the other end is drivingly connected with the motor shaft through the gear transmission member (8).

6. The electric actuator of claim 1, wherein The second detection member (5) includes a magnetic grating displacement sensor (51) and a magnetic grating plate (52), the magnetic grating displacement sensor (51) is connected with the output shaft (3); The magnetic grating plate (52) is connected with the shell (1), and the magnetic grating plate (52) is communicatively connected with the first detection member (4) for cooperating with the magnetic grating displacement sensor (51) to detect the displacement of the output shaft (3); And / or, a guide rail (10) is arranged on the output shaft (3), a sliding block (11) is arranged in the shell (1), and the guide rail (10) and the sliding block (11) are slidably matched along the axial direction of the output shaft (3).

7. The electric actuator according to any of claims 1-6, characterized in that The rotating shaft (2) is rotatably arranged in the shell (1) through a bearing assembly.

8. The electric actuator of claim 7 wherein, The bearing assembly includes two thrust bearings (12) arranged along the axial direction of the rotating shaft (2) and sleeved on the rotating shaft (2); The rotating shaft (2) is provided with a first limiting portion (13) and a second limiting portion (14) along the axial direction thereof; The two thrust bearings (12) are located between the first limiting portion (13) and the second limiting portion (14), and the shaft rings of the two thrust bearings (12) abut against the first limiting portion (13) and the second limiting portion (14) respectively.

9. The electric actuator of claim 8 wherein, The bearing assembly further includes a deep groove ball bearing (15); The deep groove ball bearing (15) is sleeved on the rotating shaft (2) and located between the two thrust bearings (12); And / or, the second limiting portion (14) is a snap spring.

10. The electric actuator of claim 1, wherein, The output shaft (3) is provided with a mounting groove at one end away from the rotating shaft (2); the mounting groove is coaxial with the output shaft (3) and is used for fitting a T-shaped block (16); the output shaft (3) is provided with at least one threaded hole (17) on the side corresponding to the mounting groove, and the threaded hole (17) is used for fixing the T-shaped block (16) through a jack screw (18).

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