Novel flow limiting structure of gas spring piston

Abstract

The utility model discloses a novel current limiting structure of a gas spring piston, which relates to the technical field of gas springs and comprises a gas spring cylinder, a piston body and a telescopic rod, the piston body is slidably arranged in the gas spring cylinder, the telescopic rod is fixedly mounted at the top of the piston body, one end of the telescopic rod penetrates through the top of the gas spring cylinder, and the other end of the telescopic rod penetrates through the gas spring cylinder. And the telescopic rod is in sealed sliding connection with the top of the air spring cylinder body, an annular groove is formed in the surface of the piston body, and a flow guide disc is rotationally arranged in the annular groove. The flow guide grooves distributed in the annular array mode in the flow guide disc correspond to the gas flow guide holes in the piston body, the coincidence area of the flow guide grooves and the gas flow guide holes is changed by rotating the flow guide disc, the gas flow can be accurately adjusted, and the gas flow resistance can be further increased by combining the micro turbulent flow protrusions on the inner walls of the flow guide grooves; fine control over the telescopic speed of the gas spring is achieved, and the differentiated requirements for buffering and supporting strength of the gas spring in different scenes are met.

Description

Technical Field

[0001] This utility model relates to the field of gas spring technology, and specifically to a novel flow-limiting structure for a gas spring piston. Background Technology

[0002] A gas spring is an industrial component that provides support, cushioning, braking, height adjustment, and angle adjustment, and is widely used in many fields such as automobiles, furniture, and machinery. During the operation of a gas spring, the flow-limiting structure of the piston plays a crucial role in its performance, controlling the flow rate and speed of the gas to achieve smooth extension and contraction, precise positioning, and other functions.

[0003] However, most existing gas spring piston flow limiting structures set flow limiting holes on the inner surface of the piston body. The gas flow is controlled by changing the number, size, shape and distribution of the flow limiting holes. However, this method of setting flow limiting holes on the inner surface of the piston body has many problems. On the one hand, the process of machining flow limiting holes inside the piston is relatively complex, requiring high-precision machining equipment and professional machining technology, which increases production costs. On the other hand, the flow limiting holes are easily blocked by impurities in the gas during long-term use, affecting the normal operation of the gas spring, and maintenance and cleaning are difficult. Therefore, we propose a new flow limiting structure for gas spring pistons. Utility Model Content

[0004] In view of the problems existing in the novel flow-limiting structure of the gas spring piston, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a novel flow-limiting structure for a gas spring piston, which solves the problem that most existing gas spring piston flow-limiting structures set flow-limiting holes on the inner surface of the piston body. The gas flow is controlled by changing the number, size, shape, and distribution of the flow-limiting holes. However, this method of setting flow-limiting holes on the inner surface of the piston body has many problems. On the one hand, the process of machining flow-limiting holes inside the piston is relatively complex, requiring high-precision machining equipment and professional machining technology, which increases production costs. On the other hand, the flow-limiting holes are easily blocked by impurities in the gas during long-term use, affecting the normal operation of the gas spring, and the maintenance and cleaning are also difficult.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel flow-limiting structure for a gas spring piston includes a gas spring cylinder, a piston body, and a telescopic rod. The piston body is slidably disposed inside the gas spring cylinder, and a telescopic rod is fixedly mounted on the top of the piston body. One end of the telescopic rod passes through the top of the gas spring cylinder and is slidably and sealingly connected to the top of the gas spring cylinder. An annular groove is provided on the surface of the piston body, and a flow guide plate is rotatably disposed inside the annular groove. Multiple flow guide grooves are provided through the interior of the flow guide plate. The multiple flow guide grooves are arranged in a circular array around the axis of the piston body. Multiple gas flow guide holes are provided at the bottom of the flow guide plate on the piston body, and the positions of the multiple gas flow guide holes correspond to the positions of the multiple flow guide grooves.

[0008] Preferably, the inner surface of the annular groove is provided with an annular limiting groove, and the inner surface of the guide plate is fixedly installed with an annular limiting protrusion, which is rotatably connected to the annular limiting groove.

[0009] Preferably, the piston body has multiple main gas channels inside the top of the guide plate. One end of each main gas channel is connected to an annular groove, and the other end of each main gas channel is connected to the gas spring cylinder chamber on the other side of the piston body.

[0010] Preferably, permanent magnet blocks are fixedly installed on both sides of the outer side of the guide plate, and a magnetic control ring is slidably provided on the outer side of the gas spring cylinder.

[0011] Preferably, both the inner surface of the guide plate and the inner surface of the annular groove are provided with multiple annular grooves, and each pair of opposite annular grooves is provided with ball bearings.

[0012] Preferably, the outer surface of the piston body is provided with a sealing ring, which is located at the top of the annular groove.

[0013] Preferably, the inner walls of the multiple flow channels are provided with multiple micro-turbulence protrusions.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. This utility model utilizes a ring-shaped array of guide grooves on a guide plate that correspond to the gas guide holes on the piston body. By rotating the guide plate to change the overlapping area of ​​these grooves, the gas flow rate can be precisely adjusted. Combined with micro-turbulence protrusions on the inner wall of the guide grooves, the gas flow resistance is further increased, enabling precise control of the gas spring's extension and retraction speed. This meets the varying needs for cushioning and support force in different scenarios. Simultaneously, the rotating connection design between the ring-shaped limiting protrusions and the ring-shaped limiting grooves ensures stable rotation of the guide plate within the ring groove, preventing axial displacement and ensuring accurate flow adjustment. The ball bearing design on the inner surfaces of the guide plate and the ring groove significantly reduces rotational friction, making operation easier and extending component lifespan. Furthermore, the sealing ring on the outer surface of the piston body is located at the top of the ring groove, effectively sealing the gap between the piston body and the gas spring cylinder, preventing gas leakage and ensuring stable gas spring operation.

[0016] 2. This utility model achieves non-contact operation by cooperating the permanent magnets on both sides of the guide plate with the magnetic control ring on the outside of the gas spring cylinder. It eliminates the need for complex through holes in the gas spring cylinder, ensuring cylinder sealing while allowing users to easily adjust the flow rate by rotating the magnetic control ring externally, using magnetic force to rotate the guide plate. Operation is simple and safe. Simultaneously, multiple main gas channels penetrate the piston body, one end connecting to the annular groove and the other end leading to the gas spring cylinder chamber on the other side of the piston, providing a stable and efficient flow path for the gas. The channel diameter and structural design are reasonable, and combined with the cooperation of the annular groove and the guide plate, the gas can flow smoothly within the gas spring cylinder, driving the piston and telescopic rod, ensuring rapid response and stable operation of the gas spring. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the gas spring cylinder of this utility model.

[0020] Figure 3 This is a schematic cross-sectional view of the piston body of this utility model;

[0021] Figure 4 for Figure 3 Enlarged view of the structure of part A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Gas spring cylinder body; 2. Piston body; 3. Telescopic rod; 4. Annular groove; 5. Guide plate; 6. Guide groove; 7. Gas guide hole; 8. Annular limiting groove; 9. Annular limiting protrusion; 10. Main gas passage; 11. Permanent magnet; 12. Magnetic control ring; 13. Annular groove; 14. Ball bearing; 15. Sealing ring; 16. Micro-turbulence protrusion. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model discloses a novel flow-limiting structure for a gas spring piston.

[0026] This utility model provides, for example Figure 1-4 The present invention discloses a novel flow-limiting structure for a gas spring piston, comprising a gas spring cylinder 1, a piston body 2, and a telescopic rod 3. The piston body 2 is slidably disposed inside the gas spring cylinder 1, and the telescopic rod 3 is fixedly mounted on the top of the piston body 2. One end of the telescopic rod 3 penetrates the top of the gas spring cylinder 1, and the telescopic rod 3 is slidably and sealingly connected to the top of the gas spring cylinder 1. The surface of the piston body 2 is provided with an annular groove 4, and a flow guide plate 5 is rotatably disposed inside the annular groove 4. Multiple flow guide grooves 6 are provided through the interior of the flow guide plate 5, and the multiple flow guide grooves 6 are arranged in a circular array around the axis of the piston body 2. The piston body 2 is provided with multiple gas flow guide holes 7 at the bottom of the flow guide plate 5, and the positions of the multiple gas flow guide holes 7 correspond to the positions of the multiple flow guide grooves 6.

[0027] This utility model discloses a novel flow-limiting structure for a gas spring piston. The annular groove 4 has an annular limiting groove 8 on its inner surface, and the flow guide plate 5 has an annular limiting protrusion 9 fixedly installed on its inner surface. The annular limiting protrusion 9 is rotatably connected to the annular limiting groove 8.

[0028] This utility model discloses a novel flow-limiting structure for a gas spring piston. The piston body 2 is provided with multiple main gas channels 10 inside the top of the guide plate 5. One end of the multiple main gas channels 10 is connected to the annular groove 4, and the other end of the multiple main gas channels 10 is connected to the gas spring cylinder 1 chamber on the other side of the piston body 2.

[0029] This utility model discloses a novel flow-limiting structure for a gas spring piston. Permanent magnet blocks 11 are fixedly installed on both sides of the outer side of the flow guide plate 5, and a magnetic control ring 12 is slidably provided on the outer side of the gas spring cylinder body 1.

[0030] This utility model discloses a novel flow-limiting structure for a gas spring piston. The inner surface of the flow guide plate 5 and the inner surface of the annular groove 4 are provided with multiple annular grooves 13. Each of the two opposite annular grooves 13 is provided with a ball bearing 14. The ball bearing 14 significantly reduces the rotational friction between the flow guide plate 5 and the annular groove 4, making operation easier.

[0031] This utility model discloses a novel flow-limiting structure for a gas spring piston. The outer surface of the piston body 2 is provided with a sealing ring 15, which is located at the top of the annular groove 4. The sealing ring 15 is used to seal the gap between the piston body 2 and the gas spring cylinder 1 to prevent gas leakage.

[0032] This utility model discloses a novel flow-limiting structure for a gas spring piston. The inner walls of the multiple flow guide grooves 6 are provided with multiple micro-turbulence protrusions 16. The micro-turbulence protrusions 16 are used to increase the resistance to gas flow and further improve the flow-limiting effect.

[0033] When the gas spring is in use, the gas in one chamber of the gas spring cylinder 1 flows into the annular groove 4 through the gas guide hole 7 on the piston body 2 and enters the guide groove 6 in the guide plate 5. At this time, the user can rotate the magnetic control ring 12 on the outside of the gas spring cylinder 1. The magnetic force between the permanent magnet block 11 and the magnetic control ring 12 will drive the guide plate 5 to rotate in the annular groove 4, changing the overlapping area of ​​the guide groove 6 and the gas guide hole 7, thereby controlling the gas flow rate. When the gas flows through the guide groove 6, the micro-turbulence protrusions 16 on the inner wall increase the gas flow resistance and further adjust the gas flow rate. The adjusted gas flows into the gas spring cylinder 1 chamber on the other side of the piston body 2 through the main gas channel 10. The gas pressure pushes the piston body 2 to slide in the gas spring cylinder 1, driving the telescopic rod 3 at the top to extend or retract, realizing the support and buffering function of the gas spring.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A novel flow-limiting structure for a gas spring piston, comprising a gas spring cylinder (1), a piston body (2), and a telescopic rod (3), characterized in that, The piston body (2) is slidably provided inside the gas spring cylinder (1). A telescopic rod (3) is fixedly installed on the top of the piston body (2). One end of the telescopic rod (3) passes through the top of the gas spring cylinder (1), and the telescopic rod (3) is slidably connected to the top of the gas spring cylinder (1). The surface of the piston body (2) is provided with an annular groove (4). A guide plate (5) is rotatably provided inside the annular groove (4). Multiple guide grooves (6) are provided inside the guide plate (5). The multiple guide grooves (6) are arranged in a ring array with the axis of the piston body (2) as the center. The piston body (2) is provided with multiple gas guide holes (7) at the bottom of the guide plate (5), and the multiple gas guide holes (7) are respectively corresponding to the positions of the multiple guide grooves (6).

2. The novel flow-limiting structure of the gas spring piston according to claim 1, characterized in that, The annular groove (4) has an annular limiting groove (8) on its inner surface, and the guide plate (5) has an annular limiting protrusion (9) fixedly installed on its inner surface. The annular limiting protrusion (9) is rotatably connected to the annular limiting groove (8).

3. The novel flow-limiting structure of the gas spring piston according to claim 1, characterized in that, The piston body (2) is provided with multiple main gas channels (10) inside the top of the guide plate (5). One end of the multiple main gas channels (10) is connected to the annular groove (4), and the other end of the multiple main gas channels (10) is connected to the gas spring cylinder (1) chamber on the other side of the piston body (2).

4. The novel flow-limiting structure of the gas spring piston according to claim 1, characterized in that, Permanent magnet blocks (11) are fixedly installed on both sides of the outer side of the guide plate (5), and a magnetic control ring (12) is slidably provided on the outer side of the gas spring cylinder (1).

5. The novel flow-limiting structure of the gas spring piston according to claim 1, characterized in that, The inner surface of the guide plate (5) and the inner surface of the annular groove (4) are provided with multiple annular grooves (13), and the two opposite annular grooves (13) are provided with balls (14).

6. The novel flow-limiting structure of the gas spring piston according to claim 1, characterized in that, The outer surface of the piston body (2) is provided with a sealing ring (15), which is located at the top of the annular groove (4).

7. The novel flow-limiting structure of the gas spring piston according to claim 1, characterized in that, The inner walls of the multiple flow channels (6) are provided with multiple micro-turbulence protrusions (16).

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