An actuator stroke shaft sealing structure

Abstract

This utility model discloses a sealing structure for an actuator stroke shaft, including a housing and a stroke shaft body. The top outer wall of the housing has a threaded groove, and a cap is threadedly connected to the top of the housing through the threaded groove. The bottom inner wall of the cap has an annular groove, within which a first sealing ring is pressed and contacts the top of the housing. The bottom of the cap has an annular groove, within which a third sealing ring is fixedly connected and contacts the outer wall of the housing. The top inner wall of the housing has a second connecting groove, within which a second sealing ring is fixedly connected. The top inner wall of the cap has a retaining groove, into which the second sealing ring is inserted. This utility model not only improves the sealing effect of the device through multiple sealing structures but also allows for smooth docking of the cap with the housing via a beveled surface.

Description

Technical Field

[0001] This utility model relates to the field of stroke shaft sealing technology, and in particular to an actuator stroke shaft sealing structure. Background Technology

[0002] After machining, the actuator stroke shaft needs to be sealed to facilitate storage and transportation. Sealing prevents moisture and oxygen from the air, avoiding oxidation caused by direct contact with the shaft surface. At the same time, sealing also prevents dust, impurities, and other contaminants from entering the shaft and affecting its performance and service life.

[0003] In production, most methods of sealing the stroke shaft after machining involve using a single sealing ring, which often results in poor sealing performance and fails to effectively isolate oxygen and moisture from the air, thus affecting the performance and quality of the stroke shaft. To better address these issues, promote technological advancements in the industry, and enhance core competitiveness, this application proposes a novel structural design that differs from existing technologies. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sealing structure for the actuator stroke shaft.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An actuator stroke shaft sealing structure includes a housing and a stroke shaft body. The top outer wall of the housing has a threaded groove, and a cap is threadedly connected to the top of the housing through the threaded groove. The bottom inner wall of the cap has an annular groove, in which a first sealing ring is pressed and contacts the top of the housing. The bottom of the cap has an annular groove, in which a third sealing ring is fixedly connected and contacts the outer wall of the housing. The top inner wall of the housing has a second connecting groove, in which a second sealing ring is fixedly connected. The top inner wall of the cap has a retaining groove, in which the second sealing ring is inserted.

[0007] As a further embodiment of this invention, a slider is movably connected inside the housing, and two limiting blocks are fixedly connected to the bottom of the slider.

[0008] As a further improvement of this utility model, limit grooves are provided on both inner walls of the housing, and the limit blocks are slidably connected to the limit grooves at the corresponding positions.

[0009] As a further improvement of this invention, an annular groove is provided on the top of the housing.

[0010] As a further embodiment of this invention, the diameter of the second sealing ring is larger than the diameter of the slider.

[0011] As a further improvement of this utility model, the bottom inner side of the cap is provided with a slope.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model is equipped with a multi-seal structure. The first sealing ring seals the contact surface between the cap and the outer wall of the top of the housing, preventing external dust and impurities from entering through the gap between the cap and the outer wall of the top of the housing, thereby improving the overall sealing effect and ensuring that the actuator stroke shaft is in a relatively stable and clean environment during storage, thus improving the sealing effect of the device.

[0014] 2. This utility model uses the combination of limiting block and limiting groove to guide the slider, which can assist in positioning the position of the stroke shaft body, and the inclined surface can facilitate the smooth docking of the cap with the housing.

[0015] 3. During the installation process, the operator can more easily align the cap with the housing and rotate it, which improves the installation efficiency. At the same time, multiple sealing rings can be pressed by rotating the cap, without the need for additional complicated installation tools or operating steps, making the installation process of the entire sealing structure simple and easy, reducing the installation difficulty and cost. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an actuator stroke shaft sealing structure proposed in this utility model;

[0017] Figure 2 This is a partial cross-sectional view of the actuator stroke shaft sealing structure proposed in this utility model;

[0018] Figure 3 This is a partial disassembly view of the actuator stroke shaft sealing structure proposed in this utility model;

[0019] In the diagram: 1. Cap; 2. Housing; 3. Annular groove; 4. Inclined surface; 5. Slot; 6. Travel shaft body; 7. Annular groove; 8. First sealing ring; 9. Threaded groove; 10. Second sealing ring; 11. Third sealing ring; 12. Limiting block; 13. Limiting groove; 14. Slider. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. The described embodiments are only some embodiments of the present utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are all within the protection scope of the present utility model.

[0021] Reference Figures 1-3 An actuator stroke shaft sealing structure includes a housing 2 and a stroke shaft body 6. A threaded groove 9 is formed on the top outer wall of the housing 2, and a cap 1 is threadedly connected to the top of the housing 2 via the threaded groove 9. An annular groove 7 is formed on the bottom inner wall of the cap 1, and a first sealing ring 8 is pressed into the annular groove 7, contacting the top of the housing 2. The first sealing ring 8 seals the contact surface between the cap 1 and the top outer wall of the housing 2. An annular groove 3 is formed at the bottom of the cap 1, and a third sealing ring 11 is fixed in the annular groove 3 by bolts, contacting the outer wall of the housing 2. The third sealing ring 11 seals the gap between the bottom of the cap 1 and the outer wall of the housing 2. A second connecting groove is formed on the top inner wall of the housing 2, and a second sealing ring 10 is bonded to the second connecting groove. A retaining groove 5 is formed on the top inner wall of the cap 1, and the second sealing ring 10 is located within the retaining groove 5. The second sealing ring 10 engages with the cap 1 through the retaining groove 5, sealing the contact surface between the cap 1 and the top inner wall of the housing 2.

[0022] The housing 2 has a sliding block 14 inside. The bottom of the sliding block 14 is fixed with two limiting blocks 12 by bolts. Limiting grooves 13 are opened on both sides of the inner wall of the housing 2, and the limiting blocks 12 are slidably connected with the limiting grooves 13. Through the cooperation of the limiting grooves 13 and the limiting blocks 12, the sliding block 14 is guided. The stroke shaft body 6 is located in the space enclosed by the sliding block 14 and the two limiting blocks 12. The stroke shaft body 6 is placed inside the housing 2, and then the sliding block 14 is put into the housing 2. The limiting blocks 12 are moved down along the limiting grooves 13 until the sliding block 14 contacts the top of the stroke shaft body 6, so that the stroke shaft body 6 is further positioned. The top of the housing 2 has an annular groove 3. The diameter of the second sealing ring 10 is larger than the diameter of the sliding block 14. The cap 1 is covered on the top of the housing 2. By rotating the cap 1, multiple sealing rings are pressed to form a multiple seal. The bottom inner side of the cap 1 has a bevel 4 to facilitate the smooth docking of the cap 1 with the housing 2.

[0023] Working principle: When sealing the travel shaft body 6 is required, first place the travel shaft body 6 inside the housing 2, then insert the slider 14 into the housing 2, and move the limiting block 12 downward along the limiting groove 13 until the slider 14 contacts the top of the travel shaft body 6. Then, cover the top of the housing 2 with the cap 1, and by rotating the cap 1, compress multiple sealing rings to form a multi-layer seal.

[0024] That is, the first sealing ring 8 seals the contact surface between the cap 1 and the top outer wall of the housing 2; the second sealing ring 10 cooperates with the cap 1 through the groove 5 to seal the contact surface between the cap 1 and the top inner wall of the housing 2; the third sealing ring 11 seals the gap between the bottom of the cap 1 and the outer wall of the housing 2.

[0025] Furthermore, the terms "installation," "setup," "connection," and "socketing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral constructions; they can refer to mechanical or electrical connections; they can refer to direct connections or indirect connections via an intermediate medium, or internal connections between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

Claims

1. A sealing structure for an actuator stroke shaft, comprising a housing (2) and a stroke shaft body (6), characterized in that, The top outer wall of the housing (2) is provided with a threaded groove (9). The top of the housing (2) is threadedly connected to a cap (1) through the threaded groove (9). The bottom inner wall of the cap (1) is provided with an annular groove (7). A first sealing ring (8) is pressed into the annular groove (7) and the first sealing ring (8) is in contact with the top of the housing (2). The bottom of the cap (1) is provided with an annular groove (3). A third sealing ring (11) is fixedly connected in the annular groove (3) and the third sealing ring (11) is in contact with the outer wall of the housing (2). The top inner wall of the housing (2) is provided with a second connecting groove. A second sealing ring (10) is fixedly connected in the second connecting groove. The top inner wall of the cap (1) is provided with a slot (5) and the second sealing ring (10) is inserted into the slot (5).

2. The actuator stroke shaft sealing structure according to claim 1, characterized in that, The housing (2) is movably connected to a slider (14), and two limiting blocks (12) are fixedly connected to the bottom of the slider (14).

3. The actuator stroke shaft sealing structure according to claim 2, characterized in that, The inner walls on both sides of the housing (2) are provided with limiting grooves (13), and the limiting block (12) is slidably connected to the limiting groove (13) at the corresponding position.

4. The actuator stroke shaft sealing structure according to claim 1, characterized in that, The top of the housing (2) is provided with an annular groove (3).

5. The actuator stroke shaft sealing structure according to claim 1, characterized in that, The diameter of the second sealing ring (10) is greater than the diameter of the slider (14).

6. The actuator stroke shaft sealing structure according to claim 1, characterized in that, The cap (1) has a sloping surface (4) on its bottom inner side.

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