Engine actuator with waterproof and dustproof structure

Abstract

The utility model relates to the technical field of engine executor discloses an engine executor with waterproof and dustproof structure, including bottom shell, the top shell is connected with the bottom shell top through main washer, the bottom shell and top shell inside are equipped with executor body, the bottom shell one side is fixedly connected with the extension cylinder, the extension cylinder inside is installed with sealing assembly, the sealing assembly includes the connecting cylinder, the connecting cylinder inner wall is located in the extension cylinder inside and is linked together with the bottom shell inside, the connecting cylinder inner wall is fixedly connected with rubber pad, in the utility model, the precision sealing assembly is arranged in the extension cylinder, and multiple waterproof and dustproof barriers are constructed for cable entrance, the cross groove rubber pad, sealing sleeve and multiple sealing rings in the assembly form the progressive sealing structure from the cable to the shell, the design can effectively block the path of water, dust along the cable invasion, greatly improves the protection level, work reliability and service life of executor under the harsh working condition.

Description

Technical Field

[0001] This utility model relates to the field of engine actuator technology, and in particular to an engine actuator with a waterproof and dustproof structure. Background Technology

[0002] Engine actuators are crucial electronic control units (ECUs) in modern internal combustion engine management systems. They translate commands from the ECU into precise mechanical actions to control key components such as throttle opening, exhaust gas recirculation (EGR) valves, and turbocharger variable geometry turbocharger (VGT). The response speed and positioning accuracy of these actuators directly affect engine power, fuel economy, and emissions levels. Because they are typically installed in the engine compartment, they operate in extremely harsh environments, constantly exposed to high temperatures, severe vibrations, oil contamination, high humidity, and rain. Therefore, providing reliable waterproof and dustproof protection for the delicate internal circuitry and mechanical components of the actuators is a prerequisite and key to ensuring their long-term stable operation and preventing malfunctions.

[0003] In existing technologies, to achieve sealing of the engine actuator housing, especially at the entrance of the external cable harness, an integrated sealing structure is typically used. One common approach is to use a cable gland, which applies axial pressure to a single, elastic rubber sealing ring via a threaded clamping nut. This causes radial deformation, tightly wrapping the passing cable and simultaneously conforming to the inner wall of the housing entrance, thus sealing any gaps. Another approach involves pre-fabricating one or more concentric annular rubber sealing lips at the cable entrance of the housing. As the cable passes through, the sealing effect is achieved through the elastic interference fit of these sealing lips.

[0004] However, these sealing methods, which rely on a single or simple interference fit of an elastomer, have inherent reliability issues in long-term, harsh operating environments. Especially at the critical cable inlet, the continuous vibration of the engine causes minute relative movements between the cable and the seal. Long-term repetitive friction wears down the seal, gradually creating a leakage path. Simultaneously, the drastic temperature changes and oil contamination within the engine compartment accelerate the aging, hardening, and cracking of the rubber seal, causing it to lose its original elasticity and sealing ability. Once this single sealing point fails, moisture and dust can easily penetrate, seeping into the actuator through the gap between the cable sheath and the seal, leading to short circuits in the internal circuit boards, corrosion of components, and jamming of mechanical parts, ultimately causing actuator malfunction. In severe cases, this can even affect driving safety. Therefore, a waterproof and dustproof engine actuator is proposed to solve these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an engine actuator with a waterproof and dustproof structure, aiming to improve the sealing method in the prior art that relies only on a single or simple elastic body interference fit, which has inherent reliability problems in long-term harsh use environments.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an engine actuator with a waterproof and dustproof structure, including a bottom shell, a top shell connected to the top of the bottom shell via a main washer, an actuator body disposed inside the bottom shell and the top shell, an extension cylinder fixedly connected to one side of the bottom shell, and a sealing component installed inside the extension cylinder;

[0007] The sealing assembly includes a connecting cylinder, the inner wall of which is disposed inside the extension cylinder and communicates with the inside of the bottom shell. A rubber gasket is fixedly connected to the inner wall of the connecting cylinder, and a cross groove is formed through the inside of the rubber gasket. A sealing ring is fitted on the outer wall of the connecting cylinder, and a sealing washer is fitted on the outer wall of the connecting cylinder near the inner wall of the extension cylinder. A sealing groove is formed inside the connecting cylinder, and a sealing sleeve is engaged inside the connecting cylinder through the sealing groove. A second sealing ring is provided between the connecting cylinder and the sealing sleeve, and a third sealing ring is provided on the inner wall of the sealing sleeve.

[0008] As a further description of the above technical solution:

[0009] An extension side one is fixedly connected to the outer wall of the bottom shell near the opening, and an extension side two is fixedly connected to the outer wall of the top shell near the opening.

[0010] As a further description of the above technical solution:

[0011] A hinge seat is fixedly connected to one outer wall of the extended side, and a rotating shaft is rotatably connected inside the hinge seat.

[0012] As a further description of the above technical solution:

[0013] An L-shaped connecting plate is fixedly connected to the outer wall of the rotating shaft, and a lead screw is threadedly connected inside the L-shaped connecting plate.

[0014] As a further description of the above technical solution:

[0015] A positioning block is fixedly connected to the lower end of the lead screw, and the outer wall of the positioning block abuts against the inner groove of the extended side.

[0016] As a further description of the above technical solution:

[0017] A knob is fixedly connected to the upper end of the lead screw, and the knob is used by the operator to drive the lead screw.

[0018] As a further description of the above technical solution:

[0019] The outer wall of the sealing ring abuts against the inner wall of the bottom shell, and the outer wall of the sealing gasket abuts against the inner wall of the extension cylinder.

[0020] As a further description of the above technical solution:

[0021] A groove is provided between the sealing sleeve and the connecting cylinder to accommodate the second sealing ring.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, a multi-layered waterproof and dustproof barrier is constructed at the cable entry point by setting a precision sealing component inside the extension cylinder. The core of this component is a rubber gasket with a cross groove, which can adaptively clamp the cable to form an initial seal. Furthermore, the internal sealing sleeve and the multiple sealing rings and gaskets arranged inside and outside it and between it and the connecting cylinder form a layered sealing structure from the cable to the housing. This design completely blocks the potential paths for moisture and dust to enter along the cable, greatly improving the environmental protection level and operational reliability of the actuator under harsh conditions, thereby extending the service life of the actuator.

[0024] 2. In this utility model, a convenient and reliable shell sealing is achieved through a locking mechanism located between the extended sides of the top and bottom shells. The operator only needs to rotate the knob to drive the lead screw, utilizing the leverage effect of the L-shaped connecting plate to apply significant and uniform pressure to the top and bottom shells. This pressure effectively tightens the main gasket between them, forming a robust sealing surface, thereby ensuring the overall sealing performance of the actuator body and improving the actuator's service life. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of an engine actuator with a waterproof and dustproof structure proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the main gasket portion of an engine actuator with a waterproof and dustproof structure proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the extension cylinder section of an engine actuator with a waterproof and dustproof structure proposed in this utility model;

[0028] Figure 4 for Figure 3 Enlarged view of point A in the image;

[0029] Figure 5 This is a schematic diagram of the rubber pad portion of an engine actuator with a waterproof and dustproof structure proposed in this utility model.

[0030] Legend:

[0031] 1. Bottom shell; 2. Top shell; 3. Main washer; 4. Extension side one; 5. Extension side two; 6. Extension cylinder; 7. Connecting cylinder; 8. Rubber pad; 9. Cross groove; 10. Sealing ring one; 11. Sealing washer one; 12. Sealing groove; 13. Sealing sleeve; 14. Sealing ring two; 15. Sealing ring three; 16. Actuator body; 17. Hinge seat; 18. Rotating shaft; 19. L-shaped connecting plate; 20. Lead screw; 21. Knob; 22. Positioning block. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-5 This utility model provides an embodiment of an engine actuator with a waterproof and dustproof structure, including a bottom shell 1. A top shell 2 is connected to the top of the bottom shell 1 via a main gasket 3 for sealing between the shells. The interiors of the bottom shell 1 and the top shell 2 together form a receiving cavity for housing the actuator body 16 to be protected. An extension tube 6 for leading out a cable is fixedly connected to one side of the bottom shell 1. A complete sealing assembly is installed inside the extension tube 6. The sealing assembly includes a connecting tube 7 as the main body of the assembly. The inner wall of the connecting tube 7 is disposed inside the extension tube 6 and communicates with the internal space of the bottom shell 1 to form a cable channel. A rubber pad 8 made of elastic material is fixedly connected to the inner wall of the connecting tube 7. A cross groove 9 is formed through the interior of the rubber pad 8. The cross groove 9 can elastically deform to tightly wrap the cable passing through it. To achieve a seal between the component and the housing, a sealing ring 10 is fitted on the outer wall of the connecting cylinder 7, and a sealing gasket 11 is fitted on its outer wall near the inner wall of the extension cylinder 6. To achieve multiple internal seals, a sealing groove 12 for installation is provided inside the connecting cylinder 7, and a sealing sleeve 13, which serves as an inner sealing structure, is engaged inside the connecting cylinder 7 through the sealing groove 12. A second sealing ring 14 is provided between the connecting cylinder 7 and the sealing sleeve 13 to eliminate gaps, and a third sealing ring 15 for contacting the cable is directly provided on the inner wall of the sealing sleeve 13. To ensure a sealing effect, the outer wall of the first sealing ring 10 is designed to abut against the inner wall of the bottom shell 1, while the outer wall of the first sealing gasket 11 abuts against the inner wall of the extension cylinder 6. To accurately position the sealing element, a groove is specially provided between the sealing sleeve 13 and the connecting cylinder 7 to accommodate the second sealing ring 14.

[0034] Specifically, by setting a sealing assembly with the connecting cylinder 7 as the core inside the extension cylinder 6, a multi-level, highly reliable waterproof and dustproof structure is constructed for the cable entry point. When the cable passes through, it is subjected to the double radial sealing effect of the sealing ring 15 and the cross groove 9 in sequence. At the same time, the sealing sleeve 13 is sealed with the connecting cylinder 7 by the sealing ring 14, and the entire connecting cylinder 7 assembly is tightly fitted with the bottom shell 1 and the extension cylinder 6 by the sealing ring 10 and the sealing gasket 11. This series of multiple and redundant sealing designs from the inside out effectively blocks all possible paths for moisture and dust to enter, ensuring the long-term stable operation of the actuator body 16 under harsh working conditions.

[0035] Reference Figures 1-5 The outer wall of the bottom shell 1 is fixedly connected to an extension side 4, which serves as a mounting base for the locking mechanism, near its opening. Correspondingly, the outer wall of the top shell 2 is also fixedly connected to an extension side 5, which bears the locking force, near its opening. A hinge seat 17, which provides a pivot point, is fixedly connected to the outer wall of the extension side 4. A pivot shaft 18, which serves as a pivot, is rotatably connected inside the hinge seat 17. An L-shaped connecting plate 19, which serves as a core lever element, is fixedly connected to the outer wall of the pivot shaft 18. A lead screw 20, which is used to apply and adjust pressure, is threadedly connected inside the L-shaped connecting plate 19. A positioning block 22, which serves as a pressure contact head, is fixedly connected to the lower end of the lead screw 20. The outer wall of the positioning block 22 is designed to abut against a pre-set groove inside the extension side 5 to ensure precise alignment of the pressing point. For ease of manual operation, a knob 21 is fixedly connected to the upper end of the lead screw 20. The knob 21 is used by the operator to apply torque to drive the lead screw 20 to rotate.

[0036] Specifically, by setting up a lever-type threaded locking mechanism consisting of a hinge seat 17, a rotating shaft 18, an L-shaped connecting plate 19, a lead screw 20, and a knob 21, efficient and labor-saving fastening of the top shell 2 and the bottom shell 1 is achieved. When the operator rotates the knob 21, the lead screw 20 rotates and moves downward within the L-shaped connecting plate 19. The lead screw 20 applies pressure to the extended side 5 of the top shell 2 through the positioning block 22 at its lower end. Utilizing the lever principle formed by the rotation of the L-shaped connecting plate 19 around the rotating shaft 18, the small torque applied by the operator to the knob 21 is amplified into a huge vertical pressure applied to the shell, thereby effectively pressing the main washer 3 to form a reliable seal and ensuring the structural stability and sealing integrity of the entire actuator.

[0037] Working principle: When the device is needed, the external cable of the actuator body 16 is first passed through the extension tube 6 and the sealing assembly installed therein. During the cable insertion process, it first forms a tight fit with the sealing ring 15 on the inner wall of the sealing sleeve 13, forming the first radial seal. Then the cable continues to pass through the cross groove 9 in the center of the rubber pad 8. The elastic deformation of the rubber pad 8 realizes adaptive clamping and wrapping of cables of different diameters, forming the second seal. At the same time, the entire sealing assembly ensures the sealing between itself and the housing through multiple structures: the sealing ring 14 fills and seals the installation gap between the sealing sleeve 13 and the connecting tube 7; while the sealing ring 10 and the sealing gasket 11 abut against the inner walls of the bottom shell 1 and the extension tube 6, respectively, blocking the channel between the connecting tube 7 and the housing.

[0038] Secondly, after the actuator body 16 is placed into the bottom shell 1 and the cable is sealed, the main washer 3 is placed at the edge of the opening of the bottom shell 1, and the top shell 2 is covered, so that its extension side 5 is located below the positioning block 22. Then, the operator turns the knob 21 clockwise, driving the lead screw 20 to rotate and descend in the threaded hole of the L-shaped connecting plate 19. The positioning block 22 at the lower end of the lead screw 20 moves downward and applies pressure to the extension side 5. Through the lever action formed by the L-shaped connecting plate 19 with the pivot 18 as the fulcrum, the torque of the knob 21 is converted into a strong vertical locking force, which firmly presses the top shell 2 and the bottom shell 1 together and fully compresses the main washer 3, thereby achieving reliable locking and tight sealing of the entire actuator housing.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An engine actuator with a waterproof and dustproof structure, comprising a base housing (1), characterized in that: The bottom shell (1) is connected to the top shell (2) via the main washer (3). The bottom shell (1) and the top shell (2) are equipped with an actuator body (16). An extension tube (6) is fixedly connected to one side of the bottom shell (1). A sealing component is installed inside the extension tube (6). The sealing assembly includes a connecting cylinder (7), the inner wall of which is disposed inside the extension cylinder (6) and communicates with the inside of the bottom shell (1). A rubber pad (8) is fixedly connected to the inner wall of the connecting cylinder (7). A cross groove (9) is formed through the inside of the rubber pad (8). A sealing ring (10) is fitted on the outer wall of the connecting cylinder (7). A sealing gasket (11) is fitted on the outer wall of the connecting cylinder (7) near the inner wall of the extension cylinder (6). A sealing groove (12) is formed inside the connecting cylinder (7). A sealing sleeve (13) is engaged inside the connecting cylinder (7) through the sealing groove (12). A sealing ring (14) is provided between the connecting cylinder (7) and the sealing sleeve (13). A sealing ring (15) is provided on the inner wall of the sealing sleeve (13).

2. The engine actuator with a waterproof and dustproof structure according to claim 1, characterized in that: The outer wall of the bottom shell (1) is fixedly connected with an extension side one (4) near the opening, and the outer wall of the top shell (2) is fixedly connected with an extension side two (5) near the opening.

3. An engine actuator with a waterproof and dustproof structure according to claim 2, characterized in that: The outer wall of the extended side (4) is fixedly connected to a hinge seat (17), and the hinge seat (17) is rotatably connected to a rotating shaft (18).

4. An engine actuator with a waterproof and dustproof structure according to claim 3, characterized in that: The outer wall of the rotating shaft (18) is fixedly connected to an L-shaped connecting plate (19), and the L-shaped connecting plate (19) is internally threaded with a lead screw (20).

5. An engine actuator with a waterproof and dustproof structure according to claim 4, characterized in that: The lower end of the lead screw (20) is fixedly connected to a positioning block (22), and the outer wall of the positioning block (22) abuts against the inner groove of the extension side (5).

6. An engine actuator with a waterproof and dustproof structure according to claim 5, characterized in that: A knob (21) is fixedly connected to the upper end of the lead screw (20), and the knob (21) is used by the operator to drive the lead screw (20).

7. An engine actuator with a waterproof and dustproof structure according to claim 1, characterized in that: The outer wall of the sealing ring (10) abuts against the inner wall of the bottom shell (1), and the outer wall of the sealing gasket (11) abuts against the inner wall of the extension tube (6).

8. An engine actuator with a waterproof and dustproof structure according to claim 1, characterized in that: A groove is provided between the sealing sleeve (13) and the connecting cylinder (7) to accommodate the sealing ring 2 (14).

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