Dustproof mute gas spring

Abstract

The utility model belongs to pneumatic spring technical field discloses a kind of dustproof mute air spring, including main rod and the auxiliary rod of sliding connection in the main rod, the movable slot is opened in the main rod, the first piston and the second piston that the inner wall surface of movable slot is fixedly connected with are fixedly connected with one end of the auxiliary rod in the movable slot, the gas hole for inflating and deflating is opened in the main rod, the plug rod for closing gas hole is fixedly connected at the gas hole, the limit plate is elastically connected to the end of the main rod far from gas hole inside, the limit ring that the limit plate cooperates is fixedly connected on the auxiliary rod, the dustproof device is detachably connected on the main rod, the utility model cooperates by the mounting block of split type design and locking structure, so that dustproof module can be independently disassembled, pressing locking head can separate mounting block when operating, without disassembling air spring main body, directly replace scraping dust ring assembly, greatly improve maintenance convenience.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic spring technology, and more specifically, to a dustproof and silent gas spring. Background Technology

[0002] Gas springs, as a common type of buffer support component, achieve controllable extension and retraction through internal compressed gas. They are widely used in automobiles, industrial equipment and other fields. Traditional dustproof structures usually use a fixed dust cover to wrap the piston rod and scrape off contaminants from the outer wall to protect the internal sealing components.

[0003] When the fixed dust cover wears out after long-term use, the overall dust protection device is not convenient to maintain or replace separately. Users must disassemble the gas spring body to replace the dust protection structure, which complicates the maintenance process and takes too long. This design flaw forces the equipment to continue to operate after the dust protection performance has deteriorated, which accelerates internal wear and produces abnormal noise, affecting the use of the gas spring.

[0004] In view of this, we propose a dustproof and silent gas spring. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this utility model is to provide a dustproof and silent gas spring to solve the problem mentioned in the background art that the fixed dustproof cover of the traditional dustproof and silent gas spring is inconvenient to maintain and replace.

[0007] 2. Technical Solution

[0008] A dustproof and silent gas spring includes a main rod and a secondary rod slidably connected within the main rod. The main rod has a movable groove. A first piston and a second piston, which are fitted against the inner wall of the movable groove, are fixedly connected to one end of the secondary rod within the movable groove. The main rod has air holes for inflation and deflation. A plug rod for sealing the air holes is fixedly connected to the air holes. A limit plate is elastically connected to the end of the main rod away from the air holes. A limit ring that cooperates with the limit plate is fixedly connected to the secondary rod. A dustproof device is detachably connected to the main rod.

[0009] Preferably, the dustproof device includes a first mounting block fixedly connected to the main rod, a second mounting block detachably connected to the first mounting block, and two dust scraping rings fixedly connected to the first and second mounting blocks, wherein the middle of the first and second mounting blocks is hollow.

[0010] Preferably, the diameter of the openings of the first mounting block and the second mounting block is larger than the diameter of the auxiliary rod, and the inner diameter of the dust scraper ring is the same as the diameter of the auxiliary rod, so that the dust scraper ring can fit snugly against the auxiliary rod.

[0011] Preferably, two first mounting plates are fixedly connected to the first mounting block, and two second mounting plates are fixedly connected to the second mounting block. A locking rod is fixedly connected to each of the two first mounting plates, and two elastically connected locking heads are slidably provided on each of the two locking rods. A locking groove adapted to the size of the locking rod is provided on each of the two second mounting plates.

[0012] Preferably, the top of the locking head is sloped, a slider is fixedly connected to the locking head, and a groove adapted to the size of the slider is opened in the locking rod. The opposing surfaces of the two locking heads that are slidably connected on the same locking rod are elastically connected by a second spring.

[0013] Preferably, the limiting plate is elastically connected to the main rod via a first spring, and the limiting ring is adapted to the size of the limiting plate, so that the sub-rod can be limited by the elastically set limiting plate before it moves to the limit position, thereby reducing the noise when the sub-rod collides with the main rod when it extends to the limit distance.

[0014] Preferably, the dust scraper rings are provided with dustproof lips that fit against the outer surface of the sub-rod. The thickness of the two dust scraper rings is the same as the thickness of the cavity formed by the first mounting block and the second mounting block, so that the two dust scraper rings can be precisely limited by the locked first mounting block and the second mounting block, so as to scrape off the dust adhering to the sub-rod in the external environment through the dustproof lips.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This utility model uses a split-design mounting block and locking structure to allow the dustproof module to be disassembled independently. During operation, the mounting block can be separated by pressing the locking head. There is no need to disassemble the gas spring body and directly replace the dust scraper ring assembly, which greatly improves the convenience of maintenance.

[0018] 2. This utility model adopts a double dust scraper ring layout in parallel to form a double physical sealing barrier. The two dust scraper rings can work together to scrape off contaminants on the surface of the auxiliary rod, so that the basic dustproof function is retained even when the single-layer dustproof lip is worn, thus extending the effective service life of the dustproof component.

[0019] 3. The elastic limiting plate of this utility model provides buffer energy absorption when the auxiliary rod is close to the limit position, avoiding abnormal noise caused by rigid collision of the main and auxiliary rods, while reducing impact damage to the metal structure and improving the smoothness and quietness of the gas spring operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a cross-sectional view of the main rod of this utility model;

[0022] Figure 3 This is a cross-sectional schematic diagram of the dust scraper ring of this utility model;

[0023] Figure 4 This is a split view of the first mounting block and the second mounting block of this utility model;

[0024] Figure 5 This is a cross-sectional view of the locking rod of this utility model.

[0025] The following are the labels in the diagram: 1. Main rod, 2. Secondary rod, 3. Movable groove, 4. First piston, 5. Second piston, 6. Limiting plate, 7. First spring, 8. Limiting ring, 9. Air hole, 91. Plug rod, 10. First mounting block, 11. Second mounting block, 12. Dust scraper ring, 121. Dustproof lip, 13. First mounting plate, 14. Second mounting plate, 15. Locking rod, 16. Locking groove, 17. Locking head, 18. Slider, 19. Slide groove, 20. Second spring. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Please see Figure 1-5 This utility model provides a technical solution:

[0030] A dustproof and silent gas spring includes a main rod 1 and a secondary rod 2 slidably connected within the main rod 1. The main rod 1 has a movable groove 3. One end of the secondary rod 2 located within the movable groove 3 is fixedly connected to a first piston 4 and a second piston 5 that fits against the inner wall of the movable groove 3. The main rod 1 has air holes 9 for inflation and deflation. A plug rod 91 for sealing the air holes 9 is fixedly connected to the air holes 9. A limiting plate 6 is elastically connected to the end of the main rod 1 away from the air holes 9. A limiting ring 8 that cooperates with the limiting plate 6 is fixedly connected to the secondary rod 2. A dustproof device is detachably connected to the main rod 1. This configuration, with its dual pistons, enhances the airtightness stability within the movable groove 3 of the main rod 1, while the elastic limiting plate 6 provides cushioning when the secondary rod 2 approaches its limit position, preventing rigid collisions and abnormal noises and extending the structural lifespan.

[0031] The dustproof device includes a first mounting block 10 fixedly connected to the main rod 1, a second mounting block 11 detachably connected to the first mounting block 10, and two dust scraper rings 12 fixedly connected within the first mounting block 10 and the second mounting block 11. The first mounting block 10 and the second mounting block 11 are hollow in the middle. This design allows for direct replacement of worn dust scraper rings 12 during subsequent use, avoiding the need for complete disassembly as in traditional designs. The two dust scraper rings 12 also enhance the dustproof effect.

[0032] In addition, the diameter of the opening of the first mounting block 10 and the second mounting block 11 is larger than the diameter of the secondary rod 2, and the inner diameter of the dust scraper ring 12 is the same as the diameter of the secondary rod 2, so that the dust scraper ring 12 can fit against the secondary rod 2. With this setting, dynamic sealing is achieved through the dust scraper ring 12 while ensuring that the secondary rod 2 can slide freely. The dust scraper ring 12 forms an active dust scraping barrier by precisely fitting, which significantly improves the blocking efficiency of pollutants such as dust and oil.

[0033] Secondly, two first mounting plates 13 are fixedly connected to the first mounting block 10, and two second mounting plates 14 are fixedly connected to the second mounting block 11. Locking rods 15 are fixedly connected to both first mounting plates 13, and two elastically connected locking heads 17 are slidably arranged on both locking rods 15. Locking grooves 16 that are adapted to the size of the locking rods 15 are opened on both second mounting plates 14. In this way, the locking rods 15 and the locking grooves 16 form a physical positioning channel to guide the mounting blocks to be accurately aligned. The elastic sliding characteristics of the locking heads 17 provide the basis for subsequent quick release. The whole structure forms a mechanical modular interface.

[0034] Furthermore, the top of the locking head 17 is set with an angle, and a slider 18 is fixedly connected to the locking head 17. A groove 19 adapted to the size of the slider 18 is opened in the locking rod 15. The opposing surfaces of the two locking heads 17 slidably connected on the same locking rod 15 are elastically connected by a second spring 20. With this setting, the locking head 17 automatically retracts when it encounters resistance, and the second spring 20 pushes the locking head 17 to reset and lock. This design realizes one-way operation self-locking. When disassembling, it is only necessary to press the locking head 17 inward to disassemble.

[0035] Furthermore, the limiting plate 6 is elastically connected to the main rod 1 via the first spring 7, and the limiting ring 8 is adapted to the size of the limiting plate 6, so that the secondary rod 2 can be limited by the elastically set limiting plate 6 before it moves to the limit position, thereby reducing the noise when the secondary rod 2 collides with the main rod 1 when it extends to the limit distance. In this way, the traditional hard metal collision is transformed into the energy absorption of the spring. When the limiting ring 8 contacts the elastic limiting plate 6, the first spring 7 is compressed to absorb the kinetic energy, transforming the violent impact into smooth braking, eliminating high-frequency collision noise, and at the same time avoiding deformation and damage to the interface of the main and secondary rods 2 due to long-term impact.

[0036] Specifically, the dust scraper ring 12 has a dustproof lip 121 that fits against the outer surface of the sub-rod 2. The thickness of the two dust scraper rings 12 is the same as the thickness of the cavity formed by the first mounting block 10 and the second mounting block 11, so that the two dust scraper rings 12 can be precisely limited by the locked first mounting block 10 and the second mounting block 11, so that the dustproof lip 121 can scrape off the dust adhering to the sub-rod 2 in the external environment. With this setting, the first dust scraper ring 12 can peel off large particulate pollutants, while the second dust scraper ring 12 continues to intercept the dust on the first dust scraper ring 12, further improving the dust removal effect.

[0037] Working principle:

[0038] When the gas spring is in operation, the auxiliary rod 2 reciprocates within the movable groove 3 of the main rod 1. The dustproof device acts as the first barrier. When the auxiliary rod 2 extends, the dust and contaminants attached to its surface are simultaneously scraped off by the dustproof lips 121 of the two dust scraper rings 12. The design of the double ring thickness precisely matching the cavity of the mounting block ensures that the dust scraper rings 12 have zero axial movement, ensuring that the seal remains effective. At the same time, the double piston structure forms an airtight barrier within the movable groove 3, maintaining stable air pressure to achieve smooth extension and retraction.

[0039] When the auxiliary rod 2 approaches its travel limit, the limiting ring 8 fixed to its body contacts the elastic limiting plate 6 at the end of the main rod 1. At this time, the limiting plate 6 absorbs the impact kinetic energy through the compression deformation of the first spring 7, transforming the rigid metal collision into flexible buffer braking, significantly reducing impact noise and protecting the interface structure of the main and auxiliary rods 2.

[0040] When replacing or maintaining, press the locking head 17 inward to compress the second spring 20 and disengage it from the locking groove 16. This will separate the second mounting block 11. After replacing the new dust scraper ring 12 assembly, align the locking rod 15 with the locking groove 16 and press it down. The inclined surface will guide the locking head 17 to automatically retract and spring back into the groove, thus completing the installation.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dustproof and silent gas spring, characterized in that: The device includes a main rod (1) and a secondary rod (2) slidably connected within the main rod (1). The main rod (1) has a movable groove (3). One end of the secondary rod (2) located within the movable groove (3) is fixedly connected to a first piston (4) and a second piston (5) that fit against the inner wall of the movable groove (3). The main rod (1) has an air hole (9) for inflation and deflation. A plug rod (91) for sealing the air hole (9) is fixedly connected to the air hole (9). A limiting plate (6) is elastically connected to one end of the main rod (1) away from the air hole (9). A limiting ring (8) that cooperates with the limiting plate (6) is fixedly connected to the secondary rod (2). A dustproof device is detachably connected to the main rod (1).

2. The dustproof and silent gas spring as described in claim 1, characterized in that: The dustproof device includes a first mounting block (10) fixedly connected to the main rod (1), a second mounting block (11) detachably connected to the first mounting block (10), and two dust scraper rings (12) fixedly connected to the first mounting block (10) and the second mounting block (11). The first mounting block (10) and the second mounting block (11) are hollow in the middle.

3. The dustproof and silent gas spring as described in claim 2, characterized in that: The diameter of the openings of the first mounting block (10) and the second mounting block (11) is greater than the diameter of the auxiliary rod (2), and the inner diameter of the dust scraper ring (12) is the same as the diameter of the auxiliary rod (2), so that the dust scraper ring (12) can fit against the auxiliary rod (2).

4. The dustproof and silent gas spring as described in claim 3, characterized in that: Two first mounting plates (13) are fixedly connected to the first mounting block (10), and two second mounting plates (14) are fixedly connected to the second mounting block (11). Locking rods (15) are fixedly connected to both first mounting plates (13), and two elastically connected locking heads (17) are slidably provided on both locking rods (15). Locking grooves (16) adapted to the size of the locking rods (15) are provided on both second mounting plates (14).

5. The dustproof and silent gas spring as described in claim 4, characterized in that: The top of the locking head (17) is set with an inclined surface. A slider (18) is fixedly connected to the locking head (17). A groove (19) adapted to the size of the slider (18) is opened in the locking rod (15). The opposite surfaces of the two locking heads (17) slidably connected on the same locking rod (15) are elastically connected by a second spring (20).

6. The dustproof and silent gas spring as described in claim 1, characterized in that: The limiting plate (6) is elastically connected to the main rod (1) via the first spring (7). The limiting ring (8) is adapted to the size of the limiting plate (6), so that the auxiliary rod (2) can be limited by the elastically set limiting plate (6) before it moves to the limit position, so as to reduce the noise when the auxiliary rod (2) collides with the main rod (1) when it extends to the limit distance.

7. The dustproof and silent gas spring as described in claim 2, characterized in that: The dust scraper ring (12) has a dustproof lip (121) that fits against the outer surface of the sub-rod (2). The thickness of the two dust scraper rings (12) is the same as the thickness of the cavity formed by the first mounting block (10) and the second mounting block (11), so that the two dust scraper rings (12) can be precisely limited by the first mounting block (10) and the second mounting block (11) after locking, so as to scrape off the dust adhering to the sub-rod (2) in the external environment through the dustproof lip (121).

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