Coating electric cylinder

Abstract

The utility model discloses a coating electric cylinder. Comprising a shell, a driving motor, a speed reducer, an executing mechanism and a guiding mechanism, and the driving motor is arranged in the shell; the speed reducer is arranged in the shell, is connected with an output shaft of the driving motor, and is arranged in the shell along the radial direction of the output shaft; the executing mechanism is arranged in the shell and comprises a lead screw, an executing nut and an ejector rod, and the driving motor drives the lead screw to rotate through the speed reducer so as to drive the executing nut and the ejector rod to move together in the axial direction of the output shaft; the guide mechanism is arranged in the shell and used for guiding the execution nut to move in the axial direction of the output shaft. According to the coating electric cylinder, the occupied space of the speed reducer in the axial direction of the output shaft can be reduced, and the size of the coating electric cylinder in the axial direction of the output shaft is reduced, so that the coating electric cylinder has relatively small size while having relatively high precision and output force.

Description

Technical Field

[0001] The present application relates to the technical field of electric cylinders, and in particular to a coating electric cylinder. Background Art

[0002] The coating machine is the core equipment for lithium battery production. Its function is to evenly apply slurry on the substrate through a slit coating die to form positive and negative electrodes. The uniformity of slurry coating determines the charging and discharging performance and life of the lithium battery, while the coating speed is related to the production capacity of the battery factory. The application of servo electric cylinders on the coating die head enables the closed-loop coating die head to have many advantages such as real-time correction, real-time control, good uniformity, and high production efficiency. However, the existing servo electric cylinders are large in size and cannot have a small size while ensuring accuracy and output force. Utility Model Content

[0003] The main technical problem solved by the present application is to provide a coating electric cylinder to solve the problem that the servo electric cylinder is large in size and cannot have a smaller size while ensuring accuracy and output force.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is to provide a coating electric cylinder, comprising:

[0005] case;

[0006] A driving motor is arranged in the housing;

[0007] A reducer is arranged in the housing, the reducer is connected to the output shaft of the driving motor, and the reducer is arranged in the housing along the radial direction of the output shaft;

[0008] an actuator, which is arranged in the housing, and includes a lead screw, an actuator nut and a push rod, wherein the lead screw is arranged parallel to the output shaft, the drive motor and the lead screw overlap along the axial direction of the output shaft, the reducer is connected to one end of the lead screw, the actuator nut is threadedly connected to the lead screw and sleeved on the outer periphery of the lead screw, and the push rod is located at the other end of the lead screw and connected to the actuator nut; and

[0009] A guide mechanism is arranged in the housing, the guide mechanism is arranged around the periphery of the actuator nut, and is connected to the actuator nut and / or the ejector rod, so as to guide the actuator nut to move along the axial direction of the output shaft;

[0010] The driving motor drives the lead screw to rotate through the reducer to drive the actuator nut to move along the axial direction of the output shaft.

[0011] In some embodiments, the push rod is a hollow structure, and when the push rod moves along the axial direction of the output shaft, the end of the screw rod away from the reducer can extend into the push rod.

[0012] In some embodiments, the guide mechanism includes a slide rail and a slide seat, the slide rail is slidably connected to the slide seat, the slide seat slides along the axial direction of the output shaft under the restriction of the slide rail, the slide rail is arranged in the shell, and the slide rail is arranged around the periphery of the slide seat; the slide seat is connected to the actuator nut and is sleeved on the periphery of the actuator nut; the slide seat moves along the axial direction of the output shaft with the actuator nut.

[0013] In some embodiments, the slide seat extends a protrusion toward the direction close to the screw rod, and a clamping groove is formed between one end of the push rod adjacent to the executing nut and the executing nut. The protrusion is located in the clamping groove and is clamped by the executing nut and the push rod.

[0014] In some embodiments, the actuator nut includes a first connecting part and a second connecting part, the inner wall of the first connecting part is provided with an internal thread, and the first connecting part is threadedly connected to the screw rod through the internal thread; the outer wall of the second connecting part is provided with an external thread, and the second connecting part is threadedly connected to the push rod through the external thread; one end of the push rod is adjacent to the actuator nut, and a clamping groove is formed between the end of the first connecting part close to the push rod, and the protrusion is clamped by the first connecting part and the push rod.

[0015] In some embodiments, the guide mechanism also includes a ball and a retaining frame, the retaining frame is provided with a clamping hole, the ball is clamped in the clamping hole, the ball can roll relative to the retaining frame, the ball and the retaining frame are arranged between the slide seat and the slide rail; the outer wall of the slide seat and the inner wall of the slide rail are jointly provided to form a slide groove, and the slide groove extends along the axial direction of the output shaft; the ball is accommodated in the slide groove and can roll in the slide groove.

[0016] In some embodiments, a limit piece is provided on the slide seat and / or the slide rail, and the limit piece is located at both ends of the slide groove, and the limit piece is used to limit the ball in the slide groove.

[0017] In some embodiments, the slide rail has an opening located beside the side of the screw rod, and a displacement sensor is correspondingly arranged at the opening. The displacement sensor is connected to the housing, and the displacement sensor is used to detect the displacement of the slide seat.

[0018] In some embodiments, two bearings are mounted on one end of the screw rod away from the push rod, the two bearings are abutted against the housing, and both bearings are angular contact bearings.

[0019] In some embodiments, the shell is provided with a accommodating cavity extending along the axial direction of the output shaft, one end of the screw rod passes through the accommodating cavity, the inner wall of the accommodating cavity is stepped, and the circumferential side of the screw rod protrudes outward from the limiting portion, and a bearing, a bearing locking nut and a screw rod locking nut are provided in the accommodating cavity. The bearing and the screw rod locking nut are both sleeved on the periphery of the screw rod, and the screw rod locking nut is also threadedly connected to one end of the screw rod. The bearing locking nut is sleeved on the periphery of the screw rod locking nut and is threadedly connected to the shell. Along the axial direction of the output shaft, the bearing is located between the limiting portion and the screw rod locking nut, one side of the bearing abuts against the inner wall of the accommodating cavity, and the other side of the bearing abuts against the bearing locking nut, so as to form a limit for the bearing and the screw rod along the axial direction of the output shaft.

[0020] The beneficial effects of the present application are as follows: in the present application, the driving motor and the actuator are axially arranged in the housing, the reducer is radially arranged in the housing, the reducer connects the driving motor and the actuator, and the execution structure adopts a screw and an execution nut. Thus, the space occupied by the reducer in the axial direction of the output shaft can be reduced, and the size of the coating electric cylinder in the axial direction of the output shaft can be reduced, so that the coating electric cylinder has a smaller size while having higher precision and output force. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural schematic diagram according to an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of an explosion structure according to an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a top view structure according to an embodiment of the present application;

[0024] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0025] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure in the CC direction;

[0026] Figure 6 is a schematic structural diagram of a housing according to an embodiment of the present application;

[0027] Figure 7 is a schematic structural diagram of the lower part of the housing according to an embodiment of the present application;

[0028] Figure 8 is a schematic diagram of the structure inside the housing according to an embodiment of the present application;

[0029] Fig. 9 is a structural schematic diagram of an actuator according to an embodiment of the present application;

[0030] Fig.10 It is a structural schematic diagram of a lead screw and an actuator nut according to an embodiment of the present application;

[0031] Fig.11 is a structural schematic diagram of a slide according to an embodiment of the present application;

[0032] Fig.12 is a schematic structural diagram of a ball and a cage according to an embodiment of the present application;

[0033] Fig.13 is a schematic structural diagram of a slide rail according to an embodiment of the present application;

[0034] Fig.14 It is a schematic structural diagram of a push rod according to an embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The preferred embodiments of the present application are provided in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0036] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0037] For the description of this application, non-limiting Figure 1 The marks "front", "rear", "up", "down", "left" and "right" shown in the figure are used to facilitate understanding of the embodiment and are not intended to limit the present application. Among them, the front-to-back direction represents the longitudinal direction, the left-to-right direction represents the transverse (radial) direction, and the up-down direction represents the vertical (axial) direction.

[0038] Figure 1-Figure 14An embodiment of the coating electric cylinder of the present application is shown, including a housing 1, a driving motor 2, a reducer 3, an actuator 4 and a guide mechanism 5; the driving motor 2 is arranged in the housing 1; the reducer 3 is arranged in the housing 1, the reducer 3 is connected to the output shaft 21 of the driving motor 2, and is arranged in the housing 1 along the radial direction of the output shaft 21; the actuator 4 is arranged in the housing 1, the actuator 4 includes a screw 41, an actuator nut 42 and a push rod 43, the screw 41 is arranged in parallel with the output shaft 21, the driving motor 2 and the screw 41 overlap in the axial direction of the output shaft 21, the reducer 3 is connected to one end of the screw 41, the actuator nut 42 is screwed to the screw 41 and is sleeved on the periphery of the screw 41, the push rod 43 is located at the other end of the screw 41 and is connected to the actuator nut 42, the driving motor 2 drives the screw 41 to rotate through the reducer 3 to drive the actuator nut 42 to move along the axial direction of the output shaft 21, so that the push rod 43 can be extended and retracted relative to the housing 1 along the axial direction of the output shaft 21. The guide mechanism 5 is disposed in the housing 1 , and is disposed around the periphery of the actuator nut 42 , and is connected to the actuator nut 42 and / or the push rod 43 , so as to guide the actuator nut 42 to move along the axial direction of the output shaft 21 .

[0039] In the present application, the drive motor 2 and the actuator 4 are axially arranged in the housing 1, the reducer 3 is radially arranged in the housing 1, the reducer 3 connects the drive motor 2 and the actuator 4, and the execution structure adopts a screw 41 and an execution nut 42. In this way, the space occupied by the reducer 3 in the axial direction of the output shaft 21 can be reduced, and the size of the coating electric cylinder in the axial direction of the output shaft 21 can be reduced, so that the coating electric cylinder has a smaller size while having higher precision and output force.

[0040] In some embodiments, Figure 2 , Figure 6 and Figure 7 As shown, the housing 1 is an integrated structure, having a plurality of accommodating chambers 11, the left accommodating chamber 11 is used to place the drive motor 2, the right accommodating chamber 11 is used to place the actuator 4, the upper accommodating chamber 11 is used to place the reducer 3, and the rear accommodating chamber 11 is used to place the circuit board 6. The integrated design of the housing 1 facilitates processing, and the drive motor 2, the reducer 3 and the actuator 4 are installed in the accommodating chamber 11 of the housing 1, thereby reducing the space occupied by the drive motor 2, the reducer 3 and the actuator 4, and making the size of the housing 1 smaller.

[0041] In some embodiments, the output shaft 21 of the driving motor 2 extends from the upper and lower ends of the driving motor 2, the output shaft 21 extending from the upper end is connected to the encoder 22, and the output shaft 21 extending from the lower end is connected to the reducer 3. The encoder 22 can be an incremental encoder and an absolute encoder, etc., for monitoring the speed, number of revolutions, etc. of the output shaft 21.

[0042] In some embodiments, the reducer 3 is a two-stage gear reducer, including a plurality of meshing gears, which are radially arranged in a receiving cavity 11 at the lower part of the housing 1 .

[0043] In some embodiments, the lower end of the screw rod 41 is fixedly connected to the last gear of the reducer 3 .

[0044] In some embodiments, Figure 2 , Figure 4 and Figure 5 As shown, the housing 1 is provided with an accommodating chamber 11 extending in the axial direction of the output shaft 21, one end of the screw rod 41 passes through the accommodating chamber 11, the inner wall of the accommodating chamber 11 is stepped, the circumference of the screw rod 41 protrudes outwardly from the limiting portion 411, and the accommodating chamber 11 is provided with a bearing 412, a bearing locking nut 413 and a screw rod locking nut 414, the bearing 412 and the screw rod locking nut 414 are both sleeved on the periphery of the screw rod 41, and the screw rod locking nut 414 is also connected to the screw rod One end of the bearing 41 is threadedly connected, and the bearing locking nut 413 is sleeved on the outer periphery of the screw locking nut 414 and is threadedly connected to the housing 1. Along the axial direction of the output shaft 21, the bearing 412 is located between the limiting portion 411 and the screw locking nut 414, one side of the bearing 412 abuts against the inner wall of the accommodating cavity 11, and the other side of the bearing 412 abuts against the bearing locking nut 413, so as to limit the bearing 412 and the screw 41 along the axial direction of the output shaft 21. The bearing 412 is limited between the limiting portion 411 and the screw locking nut 414 by the screw locking nut 414, and the bearing 412 is limited in the accommodating cavity 11 by the bearing locking nut 413, so as to avoid the axial or radial movement of the bearing 412 in the accommodating cavity 11. The bearing locking nut 413 is sleeved on the periphery of the screw locking nut 414 , which can reduce the space occupied by the bearing locking nut 413 and the screw locking nut 414 and further reduce the size of the housing 1 .

[0045] In some embodiments, two bearings 412 are provided, and the bearings 412 are angular contact bearings 412. The angular contact bearings 412 have a high load-bearing capacity and high precision, and can ensure the stability and precision of the coating electric cylinder.

[0046] When the screw rod 41 rotates, it drives the axial movement of the actuator nut 42. When the actuator nut 42 moves axially, the guide mechanism 5 limits the actuator nut 42 to guide the actuator nut 42 to move along the axial direction of the output shaft 21.

[0047] In some embodiments, Figure 2 , Fig.11 and Fig.13As shown, the guide mechanism 5 includes a slide rail 51 and a slide seat 52. The slide rail 51 is slidably connected to the slide seat 52, and the slide rail 51 and the slide seat 52 can be slidably connected by the cooperation of the projection and groove in the form of a dovetail. The slide seat 52 slides along the axial direction of the output shaft 21 under the restriction of the slide rail 51. The slide rail 51 is arranged in the housing 1. The slide rail 51 is arranged around the periphery of the slide seat 52. The slide seat 52 is connected to the actuator nut 42 and sleeved on the periphery of the actuator nut 42. The slide seat 52 moves along the axial direction of the output shaft 21 with the actuator nut 42. A keyway 44 can be provided on the slide seat 52 and the actuator nut 42, and the slide seat 52 and the actuator nut 42 are connected by a flat key. In this way, displacement of the slide seat 52 and the actuator nut 42 can be avoided, so that the connection between the slide seat 52 and the actuator nut 42 is reliable and the radial structure is more compact.

[0048] In some embodiments, Figure 2 and Fig.12 As shown, the guide mechanism 5 also includes a ball 54 and a retainer 55. The retainer 55 is provided with a clamping hole 551. The ball 54 is clamped at the clamping hole 551. The ball 54 can roll relative to the retainer 55. The ball 54 and the retainer 55 are arranged between the slide 52 and the slide rail 51. The outer wall of the slide 52 and the inner wall of the slide rail 51 are jointly formed to form a slide groove 53. The slide groove 53 extends along the axial direction of the output shaft 21. The ball 54 is accommodated in the slide groove 53 and can roll in the slide groove 53. Two balls 54 are provided, which are arranged axially. The arrangement of the ball 54 can improve the stability of the slide 52 when it slides.

[0049] In the above, the slide rail 51 is sleeved on the periphery of the slide seat 52, the ball 54 and the retainer 55 are arranged between the slide rail 51 and the slide seat 52, and the slide seat 52 is sleeved on the periphery of the actuator nut 42. These structures are arranged in the radial direction, which reduces the occupied space in the axial direction, makes the structure in the housing 1 more compact, and further reduces the size of the housing 1. And it can achieve accurate guidance of the actuator nut 42.

[0050] In some embodiments, Figure 2 , Fig.11 and Fig.13 As shown, the slide seat 52 and / or the slide rail 51 are provided with a limiter 56, which is located at both ends of the slide groove 53, and is used to limit the ball 54 in the slide groove 53. When the ball 54 is installed in the slide groove 53, the limiter 56 can be firstly provided at one end of the slide groove 53, and then the ball 54 is assembled into the slide groove 53, and then the limiter 56 is installed at the other end of the slide groove 53, so as to conveniently install the ball 54 and prevent the ball 54 from slipping out of the slide groove 53.

[0051] The stopper 56 can be a protrusion extending from one end of the slide slot 53 toward the center of the slide slot 53 . The other end is a rotatable protrusion to rotate to the slide slot 53 or away from the slide slot 53 .

[0052] In some embodiments, both ends of the slide seat 52 or the slide rail 51 are axially provided with threaded holes 512, the threaded holes 512 are adjacent to the slide groove 53, a bolt is threaded in the threaded holes 512, the cap of the bolt extends to the slide groove 53, the bolt serves as a stopper 56, and the cap of the bolt is used to limit the ball 54 in the slide groove 53. This facilitates the installation and removal of the stopper 56, so as to facilitate the installation of the ball 54.

[0053] In some embodiments, Figure 2 and Fig.13 As shown, the slide rail 51 has an opening 511 located on the side of the screw rod 41, and a displacement sensor 57 is correspondingly arranged at the opening 511. The displacement sensor 57 is connected to the housing 1, and the displacement sensor 57 is used to detect the displacement of the slide seat 52. The opening 511 on the slide rail 51 is used to set the displacement sensor 57, so as to avoid the displacement sensor 57 protruding too much from the slide rail 51, and can further save space in the housing 1 to reduce the size of the housing 1. The displacement sensor 57 can be a potentiometer displacement sensor 57, an inductive displacement sensor 57 or a magnetic scale sensor. The displacement sensor 57 is combined with the above-mentioned encoder 22 to detect the displacement of the push rod 43, so as to accurately control the push rod 43.

[0054] In some embodiments, Figure 2 , Figure 5 and Fig.10 As shown, the actuator nut 42 includes a first connection part 421 and a second connection part 422. The inner wall of the first connection part 421 is provided with an internal thread, and the first connection part 421 is screwed with the screw rod 41 through the internal thread; thereby, the actuator nut 42 and the screw rod 41 are conveniently installed and removed. The outer wall of the second connection part 422 is provided with an external thread, and the second connection part 422 is screwed with the push rod 43 through the external thread; thereby, the push rod 43 and the actuator nut 42 are conveniently installed and removed. The slide seat 52 protrudes out the protrusion 521 in the direction close to the screw rod 41. The push rod 43 is adjacent to one end of the actuator nut 42, and a clamping groove 45 is formed between the end of the first connection part 421. The protrusion 521 is located in the clamping groove 45 and is clamped by the first connection part 421 and the push rod 43. The slide seat 52 is clamped between the actuator nut 42 and the push rod 43 by the actuator nut 42, that is, it can play a role in clamping the slide seat 52, ensuring the stability of the connection between the slide seat 52 and the actuator nut 42.

[0055] In some embodiments, Figure 5As shown, the push rod 43 is a hollow structure. When the push rod 43 moves along the axial direction of the output shaft 21, the end of the screw rod 41 away from the reducer 3 can extend into the push rod 43. The lower end of the push rod 43 is connected to the execution nut 42 and is sleeved on the outer periphery of the screw rod 41, and the upper end extends out of the housing 1, thereby reducing the space occupied by the push rod 43 in the axial direction and further reducing the size of the housing 1.

[0056] In some embodiments, Figure 2 and Fig.14 As shown, the push rod 43 is stepped, and the housing 1 is provided with a stepped hole 12 corresponding to the push rod 43. The push rod 43 can extend out of the housing 1 through the stepped hole 12. When the push rod 43 slides out of the housing 1 along the axial direction of the output shaft 21, the push rod 43 also abuts against the inner wall of the stepped hole 12 to prevent the push rod 43 from continuing to slide. By setting the stepped hole 12, the push rod 43 can be limited to prevent the upper end of the push rod 43 from moving out of the housing 1.

[0057] It can be seen that the present application discloses a coating electric cylinder, in which the driving motor and the actuator are axially arranged in the housing, the reducer is radially arranged in the housing, the reducer connects the driving motor and the actuator, and the execution structure adopts a screw and an execution nut. This can reduce the space occupied by the reducer in the axial direction of the output shaft, reduce the size of the coating electric cylinder in the axial direction of the output shaft, and make the coating electric cylinder have a smaller size while having higher precision and output force.

[0058] It should be noted that in the drawings, the up and down directions of the arrows are parallel to the axial direction of the screw rod 41 , and the left and right directions of the arrows and the front and back directions of the arrows are respectively parallel to a radial direction of the screw rod 11 , but this is not limited to this.

[0059] The above are merely embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structural transformations made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A coating electric cylinder, characterized in that: include: case; A driving motor is arranged in the housing; A reducer is arranged in the housing, the reducer is connected to the output shaft of the driving motor, and the reducer is arranged in the housing along the radial direction of the output shaft; an actuator, disposed in the housing, comprising a lead screw, an actuator nut and a push rod, the lead screw being disposed in parallel with the output shaft, the drive motor and the lead screw overlapping along the axial direction of the output shaft, the reducer being connected to one end of the lead screw, the actuator nut being threadedly connected to the lead screw and sleeved on the periphery of the lead screw, the push rod being located at the other end of the lead screw and connected to the actuator nut; and A guide mechanism is arranged in the housing, the guide mechanism is arranged around the periphery of the actuator nut and is connected to the actuator nut and / or the ejector rod to guide the actuator nut to move along the axial direction of the output shaft; Wherein, the driving motor drives the screw to rotate through the reducer, so as to drive the actuator nut to move along the axial direction of the output shaft.

2. The coating electric cylinder according to claim 1, characterized in that: The push rod is a hollow structure. When the push rod moves along the axial direction of the output shaft, the end of the screw rod away from the reducer can extend into the push rod.

3. The coating electric cylinder according to claim 1, characterized in that: The guide mechanism includes a slide rail and a slide seat, the slide rail is slidably connected to the slide seat, the slide seat slides along the axial direction of the output shaft under the restriction of the slide rail, the slide rail is arranged in the shell, and the slide rail is arranged around the periphery of the slide seat; the slide seat is connected to the actuator nut and is sleeved on the periphery of the actuator nut; the slide seat moves along the axial direction of the output shaft with the actuator nut.

4. The coating electric cylinder according to claim 3, characterized in that: The slide seat extends a protrusion toward the direction close to the screw rod, and a clamping groove is formed between one end of the push rod adjacent to the executing nut and the executing nut. The protrusion is located in the clamping groove and is clamped by the executing nut and the push rod.

5. The coating electric cylinder according to claim 4, characterized in that: The actuator nut includes a first connecting part and a second connecting part. The inner wall of the first connecting part is provided with an internal thread, and the first connecting part is screwed to the screw rod through the internal thread; the outer wall of the second connecting part is provided with an external thread, and the second connecting part is screwed to the push rod through the external thread; the push rod is adjacent to one end of the actuator nut, and the clamping groove is formed between the end of the first connecting part close to the push rod, and the protrusion is clamped by the first connecting part and the push rod.

6. The coating electric cylinder according to claim 3, characterized in that: The guide mechanism also includes a ball and a retaining frame, the retaining frame is provided with a clamping hole, the ball is clamped in the clamping hole, the ball can roll relative to the retaining frame, the ball and the retaining frame are arranged between the sliding seat and the sliding rail; the outer wall of the sliding seat and the inner wall of the sliding rail are jointly provided to form a sliding groove, and the sliding groove extends along the axial direction of the output shaft; the ball is accommodated in the sliding groove and can roll in the sliding groove.

7. The coating electric cylinder according to claim 6, characterized in that: The slide seat and / or the slide rail are provided with limiting members, the limiting members are located at two ends of the slide groove, and the limiting members are used to limit the ball in the slide groove.

8. The coating electric cylinder according to claim 3, characterized in that: The slide rail has an opening located beside the screw rod, and a displacement sensor is correspondingly arranged at the opening. The displacement sensor is connected to the housing and is used to detect the displacement of the slide seat.

9. The coating electric cylinder according to claim 1, characterized in that: The end of the screw rod away from the push rod is sleeved with two bearings, the two bearings are abutted against the housing, and the two bearings are angular contact bearings.

10. The coating electric cylinder according to claim 1, characterized in that: The housing is provided with an accommodating cavity extending along the axial direction of the output shaft, one end of the screw rod passes through the accommodating cavity, the inner wall of the accommodating cavity is stepped, the circumferential side of the screw rod protrudes outward from the limiting portion, a bearing, a bearing locking nut and a screw rod locking nut are provided in the accommodating cavity, the bearing and the screw rod locking nut are both sleeved on the periphery of the screw rod, the screw rod locking nut is also threadedly connected to one end of the screw rod, the bearing locking nut is sleeved on the periphery of the screw rod locking nut and is threadedly connected to the housing, along the axial direction of the output shaft, the bearing is located between the limiting portion and the screw rod locking nut, one side of the bearing abuts against the inner wall of the accommodating cavity, and the other side of the bearing abuts against the bearing locking nut, so as to limit the bearing and the screw rod along the axial direction of the output shaft.

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