Double-piston gas spring

Abstract

The utility model relates to the technical field of gas springs, in particular to a double-piston gas spring. According to the technical scheme, the hydraulic cylinder comprises a cylinder body and piston rods arranged at the two ends of the cylinder body, the piston rods are sleeved with dustproof corrugated covers of elastic structures, the hydraulic cylinder further comprises clamping blocks fixedly connected to the ends, away from the cylinder body, of the piston rods, and sealing mechanisms connected with the clamping blocks and the cylinder body are arranged at the two ends of the dustproof corrugated covers. The dustproof corrugated cover, the clamping block, the sealing mechanism, the filtering mechanism and other structures are matched, tight sealing can be formed between the dustproof corrugated cover and the air spring body, and air carrying dust is prevented from entering the air spring from the combination position. Meanwhile, the air entering the dustproof corrugated cover is subjected to multi-stage filtering, dust particles in the air are removed, and dust is prevented from entering the dustproof corrugated cover, so that the risk that the dust is accumulated at the telescopic opening is avoided, the movement of the piston rod is not hindered by the dust particles, the good linear movement characteristic is kept, and the clamping phenomenon is avoided.

Description

Technical Field

[0001] This utility model relates to the field of gas spring technology, and in particular to a double piston gas spring. Background Technology

[0002] A double-piston gas spring mainly consists of a cylinder, piston, piston rod, end cap, and seals. Unlike ordinary gas springs, it has two pistons within the same cylinder, forming a closed air chamber, each connected to its own piston rod, which can move independently. The structural design of the double-piston gas spring results in similar structures and functions at both ends. Currently, a dustproof corrugated cover is typically used to prevent dust from entering the telescopic port of the double-piston gas spring. However, during the extension and retraction of the piston rod, the dustproof cover is continuously stretched and compressed. This process creates pressure changes inside the dustproof corrugated cover, causing some dust to be "sucked" inside. This dust tends to accumulate at the telescopic port, and over time, it can obstruct the extension and retraction of the piston rod, causing jamming and affecting the precise control and smooth operation of the equipment. Utility Model Content

[0003] The purpose of this invention is to address the problem that dustproof corrugated covers are commonly used to prevent dust from entering the telescopic port of a double-piston gas spring, but dust can still enter during the piston rod's extension and retraction, affecting the normal operation of the piston rod. This invention proposes a new type of double-piston gas spring.

[0004] The technical solution of this utility model is as follows: A double-piston gas spring includes a cylinder body and piston rods disposed at both ends of the cylinder body. Each piston rod is fitted with a dustproof corrugated cover with an elastic structure. The spring also includes: a locking block fixedly connected to the end of the piston rod away from the cylinder body; sealing mechanisms connected to the locking block and the cylinder body are provided at both ends of the dustproof corrugated cover; and a filtering mechanism disposed at the end of the dustproof corrugated cover near the cylinder body to filter the air entering the dustproof corrugated cover multiple times.

[0005] Optionally, the filtration mechanism includes a filter sleeve with an elastic structure fixedly connected to one end of the dustproof corrugated cover near the cylinder body. The outer wall of the filter sleeve has a pair of filter holes, and filter screens are fixedly connected inside each filter hole. Multiple pairs of first filter layers corresponding to the filter holes are fixedly connected inside the filter sleeve. Multiple pairs of third filter layers corresponding to the first filter layers are also fixedly connected inside the filter sleeve. A second filter layer is provided between each of the third filter layer and the first filter layer. A pair of air inlet and outlet holes are opened on the inner wall of the filter sleeve.

[0006] Optionally, the sealing mechanism includes a first connecting sleeve and a second connecting sleeve with elastic structures connected to both ends of the dustproof corrugated cover. The first connecting sleeve is disposed opposite to the cylinder body, and the second connecting sleeve is disposed opposite to the locking block. A sealing gasket is fixedly connected to both the first connecting sleeve and the second connecting sleeve. A plurality of fixing screws are provided on both the first connecting sleeve and the second connecting sleeve in a circumferential array.

[0007] Optionally, the fixing screws on the first and second connecting sleeves are screwed to both the clamping block and the cylinder body.

[0008] Optionally, each of the card blocks has a connector fixedly connected to the end away from the piston rod, and each connector has a mounting hole.

[0009] Optionally, the end of the first connecting sleeve away from the cylinder body is fixedly connected to the filter sleeve, the end of the filter sleeve away from the first connecting sleeve is fixedly connected to one end of the dustproof corrugated cover, and the end of the second connecting sleeve away from the locking block is fixedly connected to the other end of the dustproof corrugated cover.

[0010] Optionally, the first filter layer is made of porous polyurethane foam, the second filter layer is made of non-woven composite material, and the third filter layer is made of polytetrafluoroethylene microporous membrane.

[0011] Optionally, the pair of dustproof corrugated covers, piston rods, retaining blocks, connectors, and mounting holes are arranged symmetrically around the center of the cylinder body.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] This invention utilizes a combination of a dustproof corrugated cover, a locking block, a sealing mechanism, and a filtering mechanism to form a tight seal between the dustproof corrugated cover and the gas spring body, preventing air carrying dust from entering through the joint. Simultaneously, the air entering the dustproof corrugated cover undergoes multi-stage filtration to remove dust particles, preventing dust from entering the cover and thus avoiding the risk of dust accumulation at the telescopic opening. This ensures that the piston rod's movement is unimpeded by dust particles, maintaining good linear motion characteristics and preventing jamming. Attached Figure Description

[0014] Figure 1 A schematic diagram of the structure of a double-piston gas spring according to this utility model is provided;

[0015] Figure 2 for Figure 1 A schematic diagram of the split structure;

[0016] Figure 3 for Figure 2 A partial diagram of the split structure;

[0017] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0019] Figure 6 for Figure 3 A schematic diagram of the cross-sectional structure of the middle filter sleeve.

[0020] Reference numerals: 1. Cylinder block; 11. Piston rod; 12. Clamping block; 13. Connector; 14. Mounting hole; 2. Dustproof corrugated cover; 3. Filter sleeve; 31. Filter hole; 32. Filter screen; 33. First filter layer; 34. Second filter layer; 35. Third filter layer; 36. Air inlet / outlet; 4. First connecting sleeve; 451. Fixing screw; 452. Sealing gasket; 5. Second connecting sleeve. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0022] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0023] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0027] Example

[0028] like Figures 1 to 6 As shown, this utility model proposes a double-piston gas spring, including a cylinder body 1 and piston rods 11 disposed at both ends of the cylinder body 1. Each piston rod 11 is fitted with a dustproof corrugated cover 2 with an elastic structure. The function of the elastic structure is to allow the dustproof corrugated cover 2 to pass through the locking block 12. It also includes a locking block 12 fixedly connected to the end of the piston rod 11 away from the cylinder body 1, and the locking block 12 ensures a sealed connection between the piston rod 11 and the dustproof corrugated cover 2.

[0029] Among them, such as Figure 6 As shown, a filter mechanism is provided at one end of the dustproof corrugated cover 2 near the cylinder body 1. The filter mechanism is used to filter the air entering the dustproof corrugated cover 2 multiple times. The filter mechanism includes a filter sleeve 3 with an elastic structure fixedly connected to the end of the dustproof corrugated cover 2 near the cylinder body 1. The elastic structure allows the filter sleeve 3 to pass through the locking block 12. A pair of filter holes 31 are opened on the outer wall of the filter sleeve. A filter screen 32 is fixedly connected inside each filter hole 31. The filter screen 32 is used to filter large dust particles. Multiple pairs of first filter layers 33 corresponding to the filter holes 31 are fixedly connected inside the filter sleeve 3. Multiple pairs of third filter layers 35 corresponding to the first filter layers 33 are also fixedly connected inside the filter sleeve 3. A second filter layer 34 is provided between the third filter layer 35 and the first filter layer 33. A pair of air inlet and outlet holes 36 are opened on the inner wall of the filter sleeve 3.

[0030] In addition, such as Figures 3 to 5As shown, the dustproof corrugated cover 2 has sealing mechanisms at both ends. These sealing mechanisms are connected to the locking block 12 and the cylinder body 1. The sealing mechanisms include a first connecting sleeve 4 and a second connecting sleeve 5 with elastic structures connected to both ends of the dustproof corrugated cover 2. The elastic structures allow the first connecting sleeve 4 and the second connecting sleeve 5 to pass through the locking block 12. The first connecting sleeve 4 is positioned opposite the cylinder body 1, and the second connecting sleeve 5 is positioned opposite the locking block 12. Both the first connecting sleeve 4 and the second connecting sleeve 5 are fixedly connected with sealing gaskets 452, which are made of rubber and serve to increase the seal between the two components. Both the first connecting sleeve 4 and the second connecting sleeve 5 are provided with several fixing screws 451 arranged in a circumferential array. These fixing screws 451 are used to fix the first connecting sleeve 4 and the second connecting sleeve 5 to the corresponding locking block 12 and cylinder body 1. The fixing screws 451 on the first connecting sleeve 4 and the second connecting sleeve 5 are all spirally connected to the locking block 12 and the cylinder body 1.

[0031] It is worth noting that, such as Figure 1 , Figure 2 As shown, each end of the locking block 12 away from the piston rod 11 is fixedly connected to a connector 13, and each connector 13 has a mounting hole 14. The mounting hole 14 is used to install the double piston gas spring in a designated position by screws. A pair of dustproof corrugated covers 2, piston rod 11, locking block 12, connector 13 and mounting hole 14 are arranged symmetrically around the center of the cylinder body 1.

[0032] Furthermore, such as Figures 2 to 3 As shown, the end of the first connecting sleeve 4 away from the cylinder 1 is fixedly connected to the filter sleeve 3, the end of the filter sleeve 3 away from the first connecting sleeve 4 is fixedly connected to the end of the dustproof corrugated cover 2, and the end of the second connecting sleeve 5 away from the locking block 12 is fixedly connected to the other end of the dustproof corrugated cover 2.

[0033] Furthermore, such as Figure 6 As shown, the first filter layer 33 is made of porous polyurethane foam, which has relatively large pores and can typically filter larger dust particles, generally tens of micrometers or larger. However, its filtration effect on smaller micrometer or submicrometer dust particles is relatively weak. The second filter layer 34 is made of non-woven composite material, which also has relatively large pores and can typically filter larger dust particles, generally tens of micrometers or larger. However, its filtration effect on smaller micrometer or submicrometer dust particles is relatively weak. The third filter layer 35 is made of polytetrafluoroethylene microporous membrane, which has uniform and fine pores and high filtration precision. It can typically filter dust particles of about 0.1 micrometers to 1 micrometer, and has the best filtration effect on fine dust, effectively intercepting extremely fine dust and some bacteria, viruses, and other microorganisms.

[0034] In this embodiment, a double-piston gas spring is used, such as... Figure 1As shown, because the dustproof corrugated cover 2, filter sleeve 3, first connecting sleeve 4, and second connecting sleeve 5 have elastic structures, they can be fitted onto the piston rod 11 in the order of first connecting sleeve 4, filter sleeve 3, dustproof corrugated cover 2, and second connecting sleeve 5. Furthermore, the dustproof corrugated cover 2, filter sleeve 3, first connecting sleeve 4, and second connecting sleeve 5 can easily pass through the connector 13 and the locking block 12. Figure 2 As shown, the multiple fixing screws 451 on the first connecting sleeve 4 are then installed and fixed on the corresponding clip 12. Then, the fixing screws 451 on the second connecting sleeve 5 are installed and fixed on the end of the cylinder body 1. Through the sealing gaskets 452 on the first connecting sleeve 4 and the second connecting sleeve 5, the two ends of the dustproof corrugated cover 2 are finally sealed to the corresponding clip 12 and the cylinder body 1.

[0035] When the piston rod 11 extends or retracts, it causes the dustproof bellows 2 to shorten or lengthen. When the dustproof bellows 2 lengthens, it draws in outside air; conversely, it expels outside air. When drawing outside air into the dustproof bellows 2, if... Figure 6 As shown, air enters the filter sleeve 3 through the filter hole 31 and is filtered out by the filter screen 32, removing large dust particles. Finally, the dust entering the filter sleeve 3 passes through the first filter layer 33, the second filter layer 34, and the third filter layer 35 in sequence for multi-stage filtration. This ensures that dust in the air is filtered out when it enters the dustproof corrugated cover 2 through the air inlet and outlet 36, thus preventing dust from entering the dustproof corrugated cover 2.

[0036] The preferred embodiments of this utility model described above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A dual-piston gas spring comprising a cylinder (1) and a piston rod (11) arranged at both ends of the cylinder (1), a dustproof corrugated cover (2) of elastic structure being sleeved on the piston rod (11), characterized in that, Also include: The clamping block (12) fixedly connected to the end of the piston rod (11) away from the cylinder (1), the dustproof bellows (2) both ends are provided with sealing mechanism connected with the clamping block (12) and cylinder (1); Filtering mechanism, set in the dustproof bellows (2) close to the cylinder (1) one end of the air into the dustproof bellows (2) multiple filtering.

2. A dual piston gas spring according to claim 1, wherein, The filtering mechanism includes a filtering sleeve (3) with elastic structure fixedly connected to the end of the dustproof bellows (2) close to the cylinder (1), the outer wall of the filtering sleeve (3) is provided with a pair of filter holes (31), the inside of the filter hole (31) is fixedly connected with a filter screen (32), the inside of the filtering sleeve (3) is fixedly connected with a plurality of first filter layers (33) corresponding to the filter hole (31), the inside of the filtering sleeve (3) is also fixedly connected with a plurality of third filter layers (35) corresponding to the first filter layer (33), the second filter layer (34) is arranged between the third filter layer (35) and the first filter layer (33), the inner wall of the filtering sleeve (3) is provided with a pair of air inlet and outlet holes (36).

3. A dual piston gas spring according to claim 1, wherein, The sealing mechanism includes a first connecting sleeve (4) and a second connecting sleeve (5) with elastic structure connected to both ends of the dustproof bellows (2), the first connecting sleeve (4) is arranged opposite to the cylinder (1), the second connecting sleeve (5) is arranged opposite to the clamping block (12), the first connecting sleeve (4) and the second connecting sleeve (5) are fixedly connected with sealing pads (452), the first connecting sleeve (4) and the second connecting sleeve (5) are provided with a plurality of fixed screws (451) arranged in a circular array.

4. A dual piston gas spring according to claim 3, wherein, The fixed screws (451) on the first connecting sleeve (4) and the second connecting sleeve (5) are screw connected with the clamping block (12) and the cylinder (1).

5. A dual piston gas spring according to claim 1, wherein, The end of the clamping block (12) away from the piston rod (11) is fixedly connected with a connecting head (13), the connecting head (13) is provided with a mounting hole (14).

6. A dual piston gas spring according to claim 3, wherein, The end of the first connecting sleeve (4) away from the cylinder (1) is fixedly connected with the filtering sleeve (3), the end of the filtering sleeve (3) away from the first connecting sleeve (4) is fixedly connected with one end of the dustproof bellows (2), the end of the second connecting sleeve (5) away from the clamping block (12) is fixedly connected with the other end of the dustproof bellows (2).

7. A dual piston gas spring according to claim 2, wherein, The material of the first filter layer (33) is porous polyurethane foam, the second filter layer (34) is made of non-woven fabric composite material, and the third filter layer (35) is made of polytetrafluoroethylene microporous membrane.

8. A dual piston gas spring according to claim 5, wherein, A pair of the dustproof bellows (2), the piston rod (11), the clamping block (12), the connecting head (13) and the mounting hole (14) are arranged symmetrically with the center of the cylinder (1).

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