actuator

Abstract

The application discloses an actuator, comprising a body, a bellows and a driving rod. The body is provided with a guide peripheral wall, the guide peripheral wall forms a first opening, and the edge of the first opening is provided with at least one notch; the bellows is internally provided with a through groove; the driving rod is connected with the body, and the driving rod is movably arranged in the first opening and the through groove in sequence; one end of the bellows is sealingly connected to one side of the body provided with the guide peripheral wall, and the other end of the bellows is sealingly connected to the end of the driving rod away from the body; the driving rod is in contact with the edge of the first opening; and the through groove is communicated with the interior of the body through the notch. The first opening is sealed by the bellows, that is, the connecting part between the driving rod and the guide peripheral wall is sealed, so that dust and moisture are prevented from entering the interior of the body from the first opening.

Description

Technical Field

[0001] This application relates to the field of actuator technology, and particularly to an actuator. Background Technology

[0002] An actuator is a device that converts input energy (such as electrical energy, hydraulic energy, pneumatic energy, and thermal energy) into mechanical motion or force. It is widely used in industrial automation, robotics, aerospace, automotive, and medical equipment. The core function of an actuator is to convert non-mechanical energy into mechanical energy to drive mechanical parts to perform specific actions. For example, an actuator may have a drive rod, which it uses to control to perform linear reciprocating motion. In related technologies, moisture or dust can easily enter the connection between the actuator body and the drive rod, leading to easy damage and a short lifespan. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes an actuator that can prevent dust and moisture from entering the actuator from the connection between the actuator body and the drive rod, thereby protecting the actuator and ensuring its service life.

[0004] The actuator according to an embodiment of this application includes: The body has a guide peripheral wall, which forms a first opening, and the edge of the first opening has at least one notch. A bellows, wherein a through groove is formed inside the bellows; A drive rod is connected to the body and is movably inserted through the first opening and the through groove in sequence; one end of the bellows is sealed to the side of the body with the guide peripheral wall, and the other end is sealed to the end of the drive rod away from the body to seal the first opening; the drive rod contacts the edge of the first opening; the through groove communicates with the interior of the body through the notch.

[0005] The actuator according to the embodiments of this application has at least the following beneficial effects: The actuator of the embodiments of this application includes a body, a bellows, and a drive rod. The body is provided with a guide peripheral wall, which forms a first opening, and the edge of the first opening is provided with at least one notch; a through groove is formed inside the bellows; the drive rod is connected to the body, and the drive rod is movably inserted through the first opening and the through groove in sequence; one end of the bellows is sealed and connected to the side of the body with the guide peripheral wall, and the other end is sealed and connected to the end of the drive rod away from the body; the drive rod contacts the edge of the first opening; the through groove communicates with the interior of the body through the notch. By sealing the first opening with the bellows, that is, sealing the connection between the drive rod and the guide peripheral wall, dust and moisture are prevented from entering the interior of the body from the first opening. The guide peripheral wall serves as a guide, which can reduce the risk of the drive rod vibrating radially along the drive rod. The drive rod can reciprocate linearly relative to the body along its axial direction. During the drive rod's movement, the bellows contracts or expands accordingly. A notch is provided to allow the through-slot to connect with the interior of the body. This allows gas inside the bellows to flow into the body through the notch when the bellows contracts, and gas inside the body to flow into the through-slot when the bellows expands. This prevents gas from obstructing the movement of the bellows and consequently the drive rod. Therefore, the actuator in this embodiment prevents dust and moisture from entering the actuator from the connection between the actuator body and the drive rod, protecting the actuator and ensuring its lifespan. Furthermore, it prevents gas inside the bellows from obstructing the movement of the drive rod, ensuring its sensitivity.

[0006] According to some embodiments of this application, there are multiple notches, which are distributed circumferentially along the edge of the first opening, and the interval between adjacent notches is the same.

[0007] According to some embodiments of this application, a fixing frame is also included. A first annular gasket is provided at one end of the corrugated pipe near the body. The fixing frame is snapped onto the side of the body where the guide peripheral wall is provided, and the fixing frame abuts against the body through the first annular gasket to fix the first annular gasket to the body.

[0008] According to some embodiments of this application, the fixing frame is provided with an annular pressing part, a second opening is formed in the annular pressing part, the annular pressing part abuts against the body through the first annular gasket, and the corrugated pipe passes through the second opening.

[0009] According to some embodiments of this application, the outer surface of the body is provided with a first annular groove, the first annular gasket is located in the first annular groove, and the annular pressing part abuts against the first annular gasket.

[0010] According to some embodiments of this application, the corrugated pipe forms a plurality of spaced-apart stretchable folded layers along the length direction of the corrugated pipe, and the interval between adjacent folded layers is a first interval, which is greater than or equal to 1.5 mm.

[0011] According to some embodiments of this application, the end of the bellows away from the body is provided with a second annular gasket, and the outer side wall of the end of the drive rod away from the body is provided with a second annular groove, and the second annular gasket is engaged and fixed in the second annular groove.

[0012] According to some embodiments of this application, the Shore hardness of the bellows is 40A to 60A.

[0013] According to some embodiments of this application, the fixing frame is further provided with a first side plate and a second side plate, the first side plate and the second side plate are respectively provided on opposite sides of the annular pressing part, and the first side plate and the second side plate are respectively engaged and connected to the body.

[0014] According to some embodiments of this application, the first side plate is provided with a first through-hole, and the body is provided with a first protrusion that matches the first through-hole, and the first through-hole is engaged with the first protrusion; the second side plate is provided with a second through-hole, and the body is provided with a second protrusion that matches the second through-hole, and the second protrusion is engaged with the second through-hole.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the actuator according to an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the exploded structure of an actuator; Figure 3 for Figure 2 A schematic cross-sectional diagram of the structure; Figure 4 for Figure 1 A schematic diagram of the actuator from another angle, showing its exploded structure. Figure 5 for Figure 4 A partially enlarged schematic diagram of the structure. Figure 6 This is a cross-sectional schematic diagram of an actuator according to another embodiment of this application.

[0017] Figure label: Body 100; First protrusion 101; Second protrusion 102; Guide peripheral wall 110; Notch 111; First annular groove 120; Fixing frame 200; annular pressing part 210; first side plate 220; second side plate 230; Bellows 300; First annular gasket 310; Second annular gasket 320; Second annular protrusion 330; Push block 400; Drive rod 500; second annular groove 510; first annular protrusion 520. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0019] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0020] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0022] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] Reference Figures 1 to 5 This application provides an actuator including a body 100, a bellows 300, and a drive rod 500. The body 100 has a guide peripheral wall 110 forming a first opening, and the edge of the first opening has at least one notch 111. A through groove is formed inside the bellows 300. The drive rod 500 is connected to the body 100, and the drive rod 500 is movably inserted through the first opening and the through groove in sequence. One end of the bellows 300 is sealed to the side of the body 100 with the guide peripheral wall 110, and the other end is sealed to the end of the drive rod 500 away from the body 100. The drive rod 500 contacts the edge of the first opening. The through groove communicates with the interior of the body 100 through the notch 111.

[0024] It is worth noting that, in this embodiment, the actuator seals the first opening via the bellows 300, i.e., the connection between the drive rod 500 and the guide peripheral wall 110, preventing dust and moisture from entering the body 100 from the first opening. The guide peripheral wall 110 serves a guiding function, reducing the risk of radial vibration of the drive rod 500. The drive rod 500 can reciprocate linearly relative to the body 100 along its axial direction. During the movement of the drive rod 500, the bellows 300 contracts or expands with the movement of the drive rod 500. By providing a notch 111, the through groove is connected to the interior of the body 100 through the notch 111, so that when the bellows 300 contracts, the gas inside the bellows 300 flows into the interior of the body 100 through the notch 111, and when the bellows 300 expands, the gas inside the body 100 flows into the through groove through the notch 111, preventing gas problems from hindering the movement of the bellows 300 and thus the movement of the drive rod 500. Therefore, the actuator in this embodiment can prevent dust and moisture from entering the actuator from the connection between the actuator body 100 and the drive rod 500, thus protecting the actuator, ensuring its service life, and preventing the gas in the bellows 300 from hindering the movement of the drive rod 500, thus ensuring the sensitivity of the drive rod 500.

[0025] Traditional actuators achieve sealing by a sealing ring fitted onto the drive rod. When the sealing ring is compressed, if the frictional force generated exceeds the return force of the trigger spring (e.g., frictional force greater than 5N, while the trigger spring only provides 4N return force), the trigger structure will fail to reset, thus affecting its normal function. Traditional sealing structure designs cannot meet the IPX7 protection requirement of "no leakage for 30 minutes under 10kPa water pressure," nor can they pass IPX5, IPX6, and IPX7 waterproof tests. Other traditional actuators, while achieving sealing through bellows, rely solely on the bellows' elasticity for return, resulting in insufficient compression force (leakage occurs under 5kPa pressure). In this application, sealing is achieved through bellows 300, with notches 111 allowing for the release of internal gas. This ensures no leakage under 5kPa pressure and passes IPX5, IPX6, and IPX7 waterproof tests.

[0026] It should be noted that the main body 100 has a structure inside for controlling the movement of the drive rod 500. For example, it can be a linear drive cylinder or a linear drive motor. This application does not make specific limitations on the internal structure of the main body 100, as long as it can control the movement of the drive rod 500. Those skilled in the art can set the specific internal structure of the main body 100 according to actual needs.

[0027] In some embodiments, the guide peripheral wall 110 is a cylindrical bushing, and the inner diameter of the guide peripheral wall 110 is in clearance fit with the outer diameter of the drive rod 500 by 0.05 to 0.2 mm.

[0028] In some embodiments, the edge of the first opening is clearance-fitted with the drive rod 500, i.e., the guide peripheral wall 110 is clearance-fitted with the drive rod 500, so that the guide peripheral wall 110 can apply a radial support force to the drive rod 500, thereby reducing the risk of radial vibration of the drive rod 500. In one embodiment, the guide peripheral wall 110 is a guide bushing or a bearing. In other embodiments, the guide peripheral wall 110 is made of an elastic material, such as an elastic plastic. The guide peripheral wall 110 can be cylindrical, elliptical, semi-circular, or square. The guide peripheral wall 1100 can be made of rigid plastic.

[0029] In some embodiments, refer to Figure 5 There are multiple gaps 111, which are distributed circumferentially along the edge of the first opening, and the interval between adjacent gaps 111 is the same.

[0030] Specifically, the number of notches 111 is less than or equal to 4. The first opening is circular in shape, and multiple notches 111 are distributed circumferentially along the edge of the first opening. For example, if the number of notches 111 is 2, the angular interval between the notches 111 is 180 degrees; if the number of notches 111 is 3, the angular interval between adjacent notches 111 is 120 degrees; and if the number of notches 111 is 4, the angular interval between adjacent notches 111 is 90 degrees. Because the angular interval between adjacent notches 111 is the same, the gas inside the channel can be discharged evenly to the body 100, achieving balanced gas discharge path resistance and eliminating local pressure buildup.

[0031] In some embodiments, the notch 111 is opened radially outward, and is a rectangular channel with a cross-section of 2mm × 0.5mm for gas to be discharged.

[0032] It should be noted that when the number of notches 111 is greater than 4, the contact area between the guide peripheral wall 110 and the drive rod 500 will be smaller, which may result in the guide peripheral wall 110 failing to provide sufficient radial support force to the drive rod 500, thus causing radial vibration of the drive rod 500. Therefore, in this embodiment, the number of notches 111 is limited to less than or equal to 4, so that the gas in the through groove can be easily discharged into the body 100 through the notches 111, or the gas in the body 100 can be easily entered into the through groove through the notches 111, while ensuring that the guide peripheral wall 110 can provide sufficient radial support force to the drive rod 500.

[0033] It should be noted that this application does not specifically limit the shape of the notch 111. For example, the notch 111 can be a semi-circle, a round hole, a trapezoid, or a square. Those skilled in the art can set the specific shape of the notch 111 according to the actual situation.

[0034] In some embodiments, the cross-sectional area of ​​the notch 111 is 1.5 to 5 square millimeters. For example, the cross-sectional area of ​​the notch 111 can be 1.5 square millimeters, 3 square millimeters, or 5 square millimeters.

[0035] The notch 111 of this application enables the gas inside the bellows 300 to be released within 0.1 seconds.

[0036] In some embodiments, refer to Figure 3 and Figure 4 The actuator in this embodiment of the application also includes a fixing frame 200. A first annular gasket 310 is provided at one end of the bellows 300 near the body 100. The fixing frame 200 is snapped onto the side of the body 100 that is provided with a guide peripheral wall 110, and the fixing frame 200 abuts against the body 100 through the first annular gasket 310 to fix the first annular gasket 310 to the body 100.

[0037] Specifically, the first annular gasket 310 is fixed to the body 100 by the fixing bracket 200, thereby fixing the bellows 300 to the body 100. In related technologies, the actuator is prone to vibration during operation, which can cause the bellows 300 to detach. In this application, the bellows 300 is fixed by the fixing bracket 200 to prevent it from detaching from the body 100. The fixing bracket 200 is fixed by a rigid snap-fit, forming an axial compression space to generate uniform radial sealing pressure, which replaces the traditional elastic-dependent structure.

[0038] In some embodiments, refer to Figure 3 and 4 The fixing frame 200 is provided with an annular pressing part 210, and a second opening is formed in the annular pressing part 210. The annular pressing part 210 abuts against the body 100 through the first annular gasket 310, and the corrugated pipe 300 passes through the second opening.

[0039] Specifically, the annular pressing part 210 is circular in shape, and has a second opening to prevent it from obstructing the movement of the bellows 300 and the drive rod 500. The first annular gasket 310 is also circular in shape. The annular pressing part 210 presses the first annular gasket 310 against the body 100, compressing the first annular gasket 310. At this time, the first annular gasket 310 surrounds the first opening, thereby enabling the first annular gasket 310 to achieve a sealing effect.

[0040] In some embodiments, refer to Figure 2 and Figure 4 The outer surface of the body 100 is provided with a first annular groove 120, and a first annular gasket 310 is located within the first annular groove 120. The annular pressing part 210 abuts against the first annular gasket 310 to compress the first annular gasket 310. The first annular gasket 310 and the first annular groove 120 are in an interference fit to achieve a sealing effect for the first annular gasket 310. The first annular groove 120 surrounds the guide peripheral wall 110.

[0041] In some embodiments, when the first annular gasket 310 is compressed, the compression rate is 15% to 35%. For example, the compression rate is 15%, 25%, or 35%. When the compression rate is less than 15%, due to processing defects on the surface of the body 100, a gap may exist between the first annular gasket 310 and the body 100, resulting in poor sealing performance. When the compression is greater than 35%, the molecular chains of the material of the first annular gasket 310 cannot fully recover their original shape, resulting in attenuation of sealing force and permanent compression deformation. The material will creep under continuous compression, and the sealing pressure will slowly decrease over time. The initial seal is good, but leakage may occur in the long term (such as after several months). This application limits the compression to 15% to 35%, which can ensure the sealing effect of the first annular gasket 310.

[0042] In some embodiments, the first annular gasket 310 may be made of silicone or rubber. In other embodiments, the entire bellows 300 may be made of silicone or rubber.

[0043] In some embodiments, the bellows 300 forms a plurality of spaced-apart stretchable folded layers along the length of the bellows 300, and the interval between each folded layer is a first interval, which is greater than or equal to 1.5 mm.

[0044] Specifically, the bellows 300 achieves its expandability through multiple folded layers. The spacing between adjacent folded layers is equal, forming a first spacing. This first spacing prevents adjacent folded layers from sticking together, thus facilitating the expansion and contraction of the bellows 300. For example, the first spacing can be 1.5 mm or 2 mm.

[0045] It should be noted that this application does not limit the number of folded layers, and those skilled in the art can set the number of folded layers according to actual needs.

[0046] In some embodiments, the through groove is a cylindrical cavity through which the corrugated pipe 300 extends axially, with an inner diameter 0.2 mm larger than the outer diameter of the drive rod, to ensure that the drive rod 500 does not contact the folded layer when it moves. The folded layer is a U-shaped corrugation with a bending angle of approximately 180 degrees and a wall thickness of 0.3~0.8 mm.

[0047] In some embodiments, the cross-sectional area of ​​the through groove of the bellows 300 is larger than the cross-sectional area of ​​the drive rod 500, so that the drive rod 500 avoids contact with the folded layer during movement, which facilitates smoother movement of the drive rod 500. For example, in some embodiments, there is a gap between the inner sidewall of the bellows 300 and the drive rod 500, the gap being greater than or equal to 0.05 mm, for example, a gap of 0.2 mm.

[0048] In some embodiments, refer to Figure 4 The corrugated pipe 300 is provided with a second annular gasket 320 at one end away from the body 100, and the outer side wall of the drive rod 500 at one end away from the body 100 is provided with a second annular groove 510, and the second annular gasket 320 is engaged and fixed in the second annular groove 510.

[0049] Specifically, the second annular gasket 320 is circular in shape. When the second annular gasket 320 is engaged and fixed in the second annular groove 510, the second annular gasket 320 and the second annular groove 510 are in an interference fit, and the second annular gasket 320 is in a compressed state. The compression rate of the second annular gasket 320 is 15% to 35%. For example, the compression rate is 15%, 25%, or 35%. When the compression rate is less than 15%, due to the processing defects on the surface of the second annular groove 510, a gap will exist between the second annular gasket 320 and the second annular groove 510, resulting in poor sealing performance. When the compression is greater than 35%, the molecular chains of the material of the second annular gasket 320 cannot fully recover their original shape, resulting in a decrease in sealing force and permanent compression deformation. The material will creep under continuous compression, and the sealing pressure will slowly decrease over time. The initial seal is good, but leakage may occur in the long term (such as after several months). This application limits the compression to 15% to 35%, which can ensure the sealing effect of the second annular gasket 320. The material of the second annular gasket 320 can be silicone or rubber.

[0050] In tests of some embodiments, when the compression height of the first annular gasket 310 and the second annular gasket 320 is 0.25 mm, the compression rate is 20%, and the actuator can withstand pressures exceeding 50 kPa without leakage.

[0051] In some embodiments, the corrugated tube 300 is made of silicone, and the folding life of the corrugated tube 300 is ≥1 million times.

[0052] In other embodiments, the bellows 300 is made of fluororubber FKM, polyurethane PU, or rubber EPDM, in which case the folding life of the bellows 300 is ≥100,000 times.

[0053] In some implementations, the bellows 300 has a Shore hardness of 40A to 60A. Simultaneously, the first annular gasket 310 and the second annular gasket 320 also have a Shore hardness of 40A to 60A. For example, a Shore hardness of 40A, 50A, or 60A. If the Shore hardness is less than 40A, the first annular gasket 310 and the second annular gasket 320 have poor resistance to compressive deformation: they are prone to creep under continuous static pressure, increasing the permanent compression set and failing to maintain long-term sealing force. Furthermore, there is a risk of structural damage: low-hardness materials are easily cut by sharp edges (such as burrs in metal sealing grooves) during assembly, leading to through-cracks. Moreover, at low temperatures, such as when the temperature around the actuator is below -10 degrees Celsius, the material's storage modulus drops sharply, and the hardness further decreases to below 20A. At this point, the first annular gasket 310 and the second annular gasket 320 will lose their sealing interface contact pressure.

[0054] If the Shore hardness is greater than 60A, then the first annular gasket 310 and the second annular gasket 320 are made of high-hardness materials. High-hardness materials, under long-term compression, experience accelerated stress relaxation, failing to meet the ten-year lifespan requirement of IP67 rating. Furthermore, the bellows 300 is a expandable structure, and high-hardness materials are not conducive to expansion and contraction, resulting in a shorter service life. This application sets the Shore hardness of the bellows 300 to 40A to 60A, which improves the sealing effect of the first annular gasket 310 and the second annular gasket 320, and also extends the service life of the bellows 300.

[0055] In some embodiments, refer to Figure 4 The fixing frame 200 is also provided with a first side plate 220 and a second side plate 230. The first side plate 220 and the second side plate 230 are respectively provided on opposite sides of the annular pressing part 210. The first side plate 220 and the second side plate 230 are respectively engaged and connected to the body 100.

[0056] In some embodiments, the cross-sectional profile of the annular pressing portion 210 is larger than the serrated cross-sectional profile of the first annular gasket 310. The material of the annular pressing portion 210 is metal or rigid plastic.

[0057] In some embodiments, the first side plate 220 has a first through-hole, and the body 100 has a first protrusion 101 that matches the first through-hole, with the first through-hole and the first protrusion 101 engaging. The second side plate 230 has a second through-hole, and the body 100 has a second protrusion 102 that matches the second through-hole, with the second protrusion 102 engaging. Thus, the engagement between the first side plate 220 and the body 100 is achieved through the engagement between the first through-hole and the first protrusion 101; and the engagement between the second side plate 230 and the body 100 is achieved through the engagement between the second through-hole and the second protrusion 102.

[0058] In some embodiments, the first side plate 220 and the second side plate 230 are both made of elastic material, such as elastic plastic, and the first side plate 220 and the second side plate 230 are respectively fastened to two opposite side walls of the body 100.

[0059] In some embodiments, the actuator further includes a push block 400, which is mounted on the end of the drive rod 500 away from the body 100, and a second annular groove 510 is located between the body 100 and the push block 400. The drive rod 500 can drive the push block 400 to perform linear reciprocating motion.

[0060] In other embodiments, reference is made to Figure 6The drive rod 500 does not have a second annular groove 510, but instead has a first annular protrusion 520 on its outer surface. Correspondingly, the end of the bellows 300 away from the body 100 does not have a second annular gasket 320, but instead has a groove-shaped structure that matches the first annular protrusion 520. This groove-shaped structure engages with the first annular protrusion 520. Furthermore, the bellows 300 has a second annular protrusion 330 on the side facing the push block 400, and the push block 400 has a third annular groove that matches the second annular protrusion 330. The second annular protrusion 330 and the third annular groove are engaged, and the second annular protrusion 330 and the third annular groove are interference-fitted. After engagement, the thickness of the second annular protrusion 330 is compressed to 0.2 to 0.6 mm, for example, 0.2 mm, 0.4 mm, or 0.6 mm. The compression rate of the second annular protrusion 330 can be 15% to 35%, for example, 15%, 25%, or 35%. Thus, the fit between the second annular protrusion 330 and the third annular groove can withstand pressures exceeding 50 kPa without leakage, thereby ensuring a waterproof effect.

[0061] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. An actuator, characterized in that, include: The body has a guide peripheral wall, which forms a first opening, and the edge of the first opening has at least one notch. A bellows, wherein a through groove is formed inside the bellows; A drive rod is connected to the body and is movably inserted through the first opening and the through groove in sequence; one end of the bellows is sealed to the side of the body with the guide peripheral wall, and the other end is sealed to the end of the drive rod away from the body to seal the first opening; the drive rod contacts the edge of the first opening; the through groove communicates with the interior of the body through the notch.

2. The actuator according to claim 1, characterized in that, The number of gaps is multiple, and the multiple gaps are distributed circumferentially along the edge of the first opening, with the same interval between adjacent gaps.

3. The actuator according to claim 1, characterized in that, It also includes a fixing bracket, and a first annular gasket is provided at one end of the corrugated pipe near the body. The fixing bracket is snapped onto the side of the body where the guide peripheral wall is provided, and the fixing bracket abuts against the body through the first annular gasket to fix the first annular gasket to the body.

4. The actuator according to claim 3, characterized in that, The fixing frame is provided with an annular pressing part, and a second opening is formed in the annular pressing part. The annular pressing part abuts against the body through the first annular gasket, and the corrugated pipe passes through the second opening.

5. The actuator according to claim 4, characterized in that, The outer surface of the body is provided with a first annular groove, the first annular gasket is located in the first annular groove, and the annular pressing part abuts against the first annular gasket.

6. The actuator according to claim 1, characterized in that, The corrugated pipe has multiple spaced-apart stretchable folded layers along its length, and the interval between adjacent folded layers is a first interval, which is greater than or equal to 1.5 mm.

7. The actuator according to claim 1, characterized in that, The corrugated pipe is provided with a second annular gasket at the end away from the main body, and the outer wall of the drive rod at the end away from the main body is provided with a second annular groove, and the second annular gasket is engaged and fixed in the second annular groove.

8. The actuator according to claim 1, characterized in that, The bellows has a Shore hardness of 40A to 60A.

9. The actuator according to claim 4, characterized in that, The fixing frame is also provided with a first side plate and a second side plate. The first side plate and the second side plate are respectively provided on opposite sides of the annular pressing part. The first side plate and the second side plate are respectively engaged and connected to the body.

10. The actuator according to claim 9, characterized in that, The first side plate is provided with a first through hole, and the main body is provided with a first protrusion that matches the first through hole, and the first through hole and the first protrusion are engaged and connected; the second side plate is provided with a second through hole, and the main body is provided with a second protrusion that matches the second through hole, and the second protrusion is engaged and connected with the second through hole.

Images