Stepless speed regulation air spring

Abstract

The stepless speed regulation air spring relates to the technical field of air springs and comprises a piston piece and an air cylinder piece, the piston piece comprises a piston rod and a piston head, an air plug head is movably installed in the piston head in a sealed mode and used for adjusting air pressure balance of the front end and the rear end of the piston head, and the air plug head is further provided with a size-adjustable vent hole. An air hole adjusting assembly is mounted at the top end of the piston rod; the air cylinder part comprises an outer cylinder and an inner cylinder which are sleeved, a plurality of through holes are further formed in the top end of the inner cylinder and used for being communicated with the outer cylinder, the air plug head can be ejected out downwards through the slender rod, after the vent holes in the air plug head are exposed, the pressure intensity at the two ends of the piston head can be kept balanced, and therefore the piston head can be conveniently pushed to slide; the bottom end of the vent hole is arranged to be in a long strip shape, the exposed size can be changed along with sliding of the air plug head, then the sliding speed of the piston head in the inner cylinder is controlled, and control can be more flexible.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas springs, and more particularly to a stepless speed regulation gas spring. BACKGROUND

[0002] A gas spring is an industrial accessory that can support, cushion, brake, adjust height and adjust angle. It is composed of the following parts: pressure cylinder, piston rod, piston, sealing guide sleeve, filler (inert gas or oil-gas mixture), cylinder control element and cylinder control element (for controllable gas spring) and joint, etc. The principle is to fill inert gas or oil-gas mixture in a sealed pressure cylinder, so that the pressure in the cavity is several or dozens of times higher than atmospheric pressure, and the movement of the piston rod is realized by using the pressure difference generated by the cross-sectional area of the piston rod being smaller than the cross-sectional area of the piston.

[0003] A common piston or plug generally has a damping hole, which is used to maintain the pressure balance at the front and rear ends of the piston. However, the inventor realizes that the speed of the gas spring is controlled by the size of the damping hole. Once the size of the damping hole on the piston is determined, the speed of the gas spring is also determined. When the gas spring is installed on the required equipment, the speed of the gas spring cannot be adjusted, and the best use efficiency cannot be achieved. SUMMARY

[0004] In order to solve the problems in the background art, the present application provides a stepless speed regulation gas spring.

[0005] The stepless speed regulation gas spring provided by the present application adopts the following technical scheme: A stepless speed regulation gas spring, comprising: a piston piece and a cylinder piece, the piston piece comprising a piston rod and a piston head, a gas plug head is further sealingly and movably installed in the piston head for adjusting the air pressure balance at the front and rear ends of the piston head, a size-adjustable air hole is further formed in the gas plug head, and an air hole adjusting assembly is installed at the top end of the piston rod; The cylinder piece comprises a sleeve-fitted outer cylinder and an inner cylinder, a plurality of through holes are further formed at the top end of the inner cylinder for communication with the outer cylinder, and the piston head is sealingly and slidably arranged in the inner cylinder.

[0006] In some embodiments, upper and lower plugs are sealingly installed at the upper and lower ends of the outer cylinder and the inner cylinder, respectively, a lower cavity and an upper cavity are formed in the inner cylinder by the piston head, and an outer cavity is formed between the outer cylinder and the inner cylinder, wherein the upper cavity and the outer cavity are in communication. The piston rod is hollow and slidably sleeved with an elongated rod, the bottom end of the elongated rod is connected to the top of the gas plug head, and a balance cavity in communication with the upper cavity is further formed in the gas plug head.

[0007] In some embodiments, the vent hole extends through the top and side surfaces of the air plug head, and the vent hole on the side surface of the air plug head is elongated. As the air plug head is gradually exposed, the size of the exposed vent hole can change accordingly.

[0008] In some embodiments, a hoop is fitted at the top of the air plug, and a limiting groove adapted to the hoop is provided on the inner wall of the balance chamber, with the hoop being slidably and sealingly disposed in the limiting groove.

[0009] In some implementations, the piston head is made of magnetic metal, and a permanent magnet is installed at the top of the piston head.

[0010] In some embodiments, the top end of the piston rod is provided with a U-shaped groove, the top end of the slender rod extends into the U-shaped groove, and fixing holes for matching installation are provided on both sides of the U-shaped groove.

[0011] In some embodiments, the vent adjustment assembly includes a bracket mounted on a piston rod, in which a rocker is rotatably mounted via a pin, one end of the rocker extending into a U-groove resting on a slender rod for pressing the slender rod down.

[0012] In some embodiments, the vent adjustment assembly further includes a steel cable connected to the outer end of the rocker. A flexible spring is installed at the top of the support frame, with a handle connected to the free end of the flexible spring. A steel cable passes through the top of the support frame and slides through the flexible spring. A return spring is installed between the outer end of the rocker and the top wall of the support frame, and the return spring is sleeved on the outer ring of the steel cable.

[0013] In some embodiments, the handle is hollow inside and has an adjustment groove on its side. A bolt is slidably disposed in the adjustment groove, and the top of the steel cable extends into the handle and is fixedly connected to the bolt.

[0014] In some embodiments, a balancing assembly is also provided in the outer cavity, the balancing assembly including a piston ring that is slidably disposed in the outer cavity, and a balancing spring is also installed between the top of the piston ring and the upper plug.

[0015] In summary, in the technical solution of this application embodiment, the piston head is slidably disposed in the inner cylinder. When it is necessary to push the piston head to slide, the air plug head can be pushed downward by a thin rod. After the vent hole on the air plug head is exposed, the pressure at both ends of the piston head can be kept balanced, thereby facilitating the sliding of the piston head. Furthermore, the bottom end of the vent hole is set to be elongated, which can change the size of the exposed portion as the air plug head slides, thereby controlling the speed at which the piston head slides in the inner cylinder, allowing for more flexible control. In the technical solution of this application embodiment, a rocker plate is provided at the top of the piston rod. The outer end of the rocker plate is connected and controlled by a steel cable and a return spring. The inner end of the rocker plate rests on the top of the slender rod. As the rocker plate rotates, it can push the slender rod down, thereby pushing the air plug head out of the piston head for easy adjustment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the gas spring in this application; Figure 2 This is a structural schematic diagram of the cross-section of the gas spring in this application; Figure 3 This is a schematic diagram of the piston component of this application; Figure 4 This is a cross-sectional structural diagram of the piston head of this application; Figure 5 This is a cross-sectional structural diagram of the air plug head of this application; Figure 6 This is a schematic diagram of the structure of the balancing component of this application; Figure 7 This is a schematic diagram of the structure of the pore adjustment component of this application; Figure 8 This is a cross-sectional structural diagram of the handle component of this application; Figure 9 This is a schematic diagram of another embodiment of the piston head of this application.

[0017] Explanation of reference numerals in the attached drawings: 1. Piston component; 101. Piston rod; 102. Piston head; 1021. Balance chamber; 1022. Limiting groove; 103. Air plug head; 1031. Vent hole; 1032. Hoop ring; 104. Slender rod; 105. Permanent magnet; 106. U-shaped groove; 2. Cylinder components; 201. Outer cylinder; 2011. Outer cavity; 202. Inner cylinder; 2021. Lower cavity; 2022. Upper cavity; 2023. Through hole; 203. Upper plug; 204. Lower plug; 3. Air vent adjustment assembly; 301. Bracket; 302. Rocker; 303. Steel cable; 304. Return spring; 305. Spring hose; 306. Handle; 307. Pull bolt; 4. Balance assembly; 401. Piston ring; 402. Balance spring. Detailed Implementation

[0018] The following is in conjunction with the appendix Figures 1 to 9 The present invention will be described in further detail below.

[0019] In the description of this application, it should be understood that the terms "thickness," "upper," "top," "bottom," "inner," "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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 application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] It should be noted that the accompanying drawings are schematic and not to scale. For clarity and convenience, the relative dimensions and proportions of the parts shown are exaggerated or reduced in size; all dimensions are merely illustrative and not limiting. Furthermore, the same reference numerals are used for the same structures, elements, or fittings appearing in more than two drawings to indicate similar features.

[0021] In related technologies, the piston or plug of a gas spring is generally provided with a damping hole. The damping hole is used to maintain the pressure balance at the front and rear ends of the piston. When the piston moves, the air pressure in the cavity at the front and rear ends of the piston is exchanged through the damping hole. Therefore, once the size of the damping hole on the piston is determined, the movement speed of the gas spring is also determined. To facilitate adjusting the forward and backward movement of the piston head 102, refer to... Figure 1 , Figure 2 As shown, the gas spring of this application includes a piston 1 and a cylinder 2: The piston component 1 includes a piston rod 101 and a piston head 102. An air plug head 103 is also sealed and movably installed in the piston head 102 for adjusting the air pressure balance at both ends of the piston head 102. An adjustable vent hole 1031 is also provided on the air plug head 103. The cylinder component 2 includes a fitted outer cylinder 201 and an inner cylinder 202. The top of the inner cylinder 202 is also provided with multiple through holes 2023 for maintaining communication with the outer cylinder 201. The piston head 102 is sealed and slidably disposed in the inner cylinder 202. In this embodiment of the application, after the air plug head 103 is pushed out of the piston head 102, the vent hole 1031 on the air plug head 103 will be exposed. At this time, the air pressure at both ends of the piston head 102 can be exchanged through the vent hole 1031 to achieve balance. Then the piston head 102 can be easily pushed to slide in the inner cylinder 202. To adjust the sliding speed of the piston head 102, refer to Figure 3 ,Figure 4 , Figure 5 , Figure 9 As shown, the vent 1031 penetrates the top and side surfaces of the air plug head 103, and the vent 1031 on the side surface of the air plug head 103 is elongated. As the air plug head 103 is gradually exposed, the size of the exposed vent 1031 can change accordingly. In this embodiment of the application, the piston rod 101 is hollow inside and a slender rod 104 is slidably fitted inside it. The bottom end of the slender rod 104 is connected to the top of the air plug head 103. The air plug head 103 is also provided with a balance chamber 1021 that communicates with the upper cavity 2022. During operation, the air plug head 103 can be pushed downward by the slender rod 104. As the air plug head 103 slides, the size of the exposed vent hole 1031 can change accordingly. The size of the vent hole 1031 is positively correlated with the rate of air pressure exchange. As the vent hole 1031 gradually increases in size, the sliding speed of the piston head 102 in the inner cylinder 202 will be faster, thereby allowing for more flexible control of the movement of the piston head 102 and the piston rod 101. In this embodiment of the application, the air plug head 103 is made of magnetic metal, and a permanent magnet 105 is also installed at the top of the piston head 102. Furthermore, in order to ensure that the air plug head 103 can retract into the piston head 102 to maintain a seal, a retraction spring can be installed between the top of the air plug head 103 and the top wall of the balance chamber 1021. After the slender rod 104 is unrestrained, the permanent magnet 105 can cooperate with the retraction spring to pull the air plug head 103 back into the piston head 102 to maintain a seal. During operation, the downward pressure of the slender rod 104 can push the air plug head 103 to slide outwards towards the piston head 102, thereby exposing the vent hole 1031 and facilitating the control of the air pressure balance at both ends of the piston head 102. After the piston head 102 has finished sliding and adjusting, the downward pressure on the slender rod 104 disappears. At this time, with the cooperation of the permanent magnet 105 and the retraction spring, the air plug head 103 can be attracted, making it easy to retract the air plug head 103 back into the piston head 102, cutting off the gas exchange channel, thereby restricting the sliding of the piston head 102. In this embodiment of the application, the top of the air plug head 103 is also fitted with a hoop 1032, and the inner wall of the balance cavity 1021 is also provided with a limiting groove 1022 that is adapted to the hoop 1032. The hoop 1032 is sealed and slidably disposed in the limiting groove 1022. During operation, the clamp 1032 is restricted to slide in the limiting groove 1022, which can limit the sliding distance of the air plug head 103, thereby preventing the air plug head 103 from completely disengaging from the piston head 102.

[0022] To facilitate control of the movement of the slender rod 104, refer to... Figure 1 , Figure 2, Figure 7 , Figure 8 As shown, an air vent adjustment assembly 3 is installed at the top of the piston rod 101. The air vent adjustment assembly 3 includes a bracket 301 installed on the piston rod 101. A rocker 302 is rotatably installed in the bracket 301 via a pin. One end of the rocker 302 extends into the U-shaped groove 106 and rests on the slender rod 104 for pressing the slender rod 104 down. In this embodiment of the application, the air vent adjustment component 3 also includes a steel cable 303 connected to the outer end of the rocker 302, a spring hose 305 is also installed on the top of the support 301, a handle 306 is connected to the free end of the spring hose 305, the steel cable 303 passes through the top of the support 301 and slides through the spring hose 305, and a return spring 304 is also installed between the outer end of the rocker 302 and the top wall of the support 301, the return spring 304 is sleeved on the outer ring of the steel cable 303; During operation, by retracting the steel cable 303, the outer end of the rocker 302 can be pulled upward and flipped. At this time, the inner end of the rocker 302 can press down the slender rod 104, and the reset spring 304 can easily push the rocker 302 back to its original position. In this embodiment of the application, the handle 306 is hollow inside and has an adjustment groove on the side. A bolt 307 is slidably disposed in the adjustment groove. The top end of the steel cable 303 extends into the handle 306 and is fixedly connected to the bolt 307. During operation, by holding the handle 306 and sliding the pull bolt 307 along the adjustment groove, the steel cable 303 can be retracted. The spring hose 305 provides support. When the steel cable 303 retracts into the handle 306, the spring hose 305 abuts against the top of the bracket 301. As the steel cable 303 retracts, the rocker 302 can be flipped. The adjustment groove controls the length of the retracted steel cable 303, thereby controlling the distance the slender rod 104 is pressed down. The deeper the slender rod 104 is pressed down, the larger the vent hole 1031 on the air plug head 103 will be exposed, thus facilitating the control of the sliding speed of the piston head 102. On the other hand, the handle 306 can also be fixed to a component connected to the end of the piston rod 101. After gripping the component and turning the pull bolt 307, the component can be pushed to compress or stretch the gas spring and adjust its length.

[0023] Specifically, to facilitate understanding of the pressure changes at both ends of the piston head 102, refer to... Figure 2 As shown, upper plugs 203 and lower plugs 204 are respectively sealed at the upper and lower ends of the outer cylinder 201 and the inner cylinder 202. The inner cylinder 202 forms a lower cavity 2021 and an upper cavity 2022 through the piston head 102. An outer cavity 2011 is formed between the outer cylinder 201 and the inner cylinder 202. The upper cavity 2022 and the outer cavity 2011 are kept in communication. The piston head 102 can separate the lower chamber 2021 and the upper chamber 2022 in the inner cylinder 202. As the piston head 102 slides, the gas inside the lower chamber 2021 and the upper chamber 2022 will continuously exchange and maintain gas pressure balance.

[0024] After the piston head 102 is fixed, the air pressure in the lower chamber 2021 and the upper chamber 2022 remains balanced. The magnitude of the pressure is equal to the product of the pressure intensity and the area of ​​pressure. At this time, the cross-sectional area of ​​the piston head 102 is larger than the cross-sectional area of ​​the piston rod 101. Therefore, the pressure will push the piston head 102 towards the piston rod 101. As the piston head 102 slides, it compresses the gas in the upper chamber 2022, causing the air pressure in the upper chamber 2022 to be greater than the air pressure in the lower chamber 2021, maintaining the balance of forces on both ends of the piston head 102. Therefore, after the piston head 102 stops adjusting, it will slide a small distance due to the imbalance of forces, resulting in a certain error. To eliminate this error, refer to... Figure 2 , Figure 6 As shown, a balance assembly 4 is also provided in the outer cavity 2011. The balance assembly 4 includes a piston ring 401 that is sealed and slidably disposed in the outer cavity 2011. A balance spring 402 is also installed between the top of the piston ring 401 and the upper plug 203. In this embodiment, during the processing completion stage, the air pressure in the lower cavity 2021 is greater than the air pressure in the upper cavity 2022. The outer cavity 2011 and the upper cavity 2022 are kept in communication and have the same air pressure. When the piston head 102 is slid for the first time, the air pressure in the lower cavity 2021 will be balanced with the air pressure in the upper cavity 2022 through the cooperation of the vent hole 1031. At this time, the air pressure in the upper cavity 2022 will be greater than the initial air pressure. The increased air pressure will push the piston ring 401 in the outer cavity 2011 to slide and stretch the balance spring 402. After the piston head 102 is adjusted, the elastic force of the balance spring 402 will pull the piston ring 401 to move and compress the air pressure in the upper cavity 2022, thereby maintaining the balance of forces on both ends of the piston head 102 and ensuring the accuracy of the position of the piston head 102. On the other hand, as the balance spring 402 pulls the piston ring 401 to slide, the air pressure in the outer cavity 2011 below the piston ring 401 will decrease. When the piston head 102 is adjusted next time, the air pressure in the lower cavity 2021 and the upper cavity 2022 will be balanced again. In this state, the air pressure in the upper cavity 2022 is greater than the air pressure in the upper cavity 2022 during the initial adjustment. Therefore, the piston ring 401 will be pushed downward, thereby stretching the balance spring 402. After the piston head 102 stops adjusting, the balance spring 402 will continue to pull the piston ring 401 to slide, increasing the air pressure in the upper cavity 2022 and maintaining the balance of forces on both ends of the piston head 102. Thus, the adjustment principle will remain consistent thereafter, making it convenient to keep the piston head 102 stopped in the accurate position.

[0025] All standard parts used in this application can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention 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 invention. Various changes and modifications can be made to the invention without departing from the spirit and scope of this application, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A continuously variable speed gas spring, comprising a piston (1) and a cylinder (2), characterized in that: The piston component (1) includes a piston rod (101) and a piston head (102). A gas plug (103) is also installed in the piston head (102) for adjusting the air pressure balance at both ends of the piston head (102). An adjustable vent hole (1031) is also provided on the gas plug (103). A vent adjustment component (3) is installed at the top of the piston rod (101). The cylinder component (2) includes an outer cylinder (201) and an inner cylinder (202) that fit together. The top of the inner cylinder (202) is also provided with multiple through holes (2023) for maintaining communication with the outer cylinder (201). The piston head (102) is sealed and slidably disposed in the inner cylinder (202).

2. The stepless speed regulating gas spring according to claim 1, characterized in that: The upper end of the outer cylinder (201) and the lower end of the inner cylinder (202) are respectively sealed with an upper plug (203) and a lower plug (204). The inner cylinder (202) is formed by a piston head (102) to form a lower cavity (2021) and an upper cavity (2022). An outer cavity (2011) is formed between the outer cylinder (201) and the inner cylinder (202). The upper cavity (2022) and the outer cavity (2011) are kept in communication. The piston rod (101) is hollow inside and has a slender rod (104) slidably fitted inside. The bottom end of the slender rod (104) is connected to the top of the air plug head (103). The air plug head (103) also has a balance chamber (1021) that communicates with the upper cavity (2022).

3. The stepless speed regulating gas spring according to claim 2, characterized in that: The vent (1031) penetrates the top and side surfaces of the air plug (103), and the vent (1031) on the side of the air plug (103) is elongated. As the air plug (103) is gradually exposed, the size of the exposed vent (1031) can change accordingly.

4. The stepless speed regulating gas spring according to claim 2, characterized in that: The top of the air plug (103) is also fitted with a hoop (1032), and a limiting groove (1022) adapted to the hoop (1032) is also provided on the inner wall of the balance cavity (1021). The hoop (1032) is sealed and slidably disposed in the limiting groove (1022).

5. The stepless speed regulating gas spring according to claim 1, characterized in that: The air plug head (103) is made of magnetic metal, and a permanent magnet (105) is installed at the top of the piston head (102).

6. The stepless speed regulating gas spring according to claim 2, characterized in that: The piston rod (101) is also provided with a U-shaped groove (106) at the top end, and the top end of the slender rod (104) extends into the U-shaped groove (106), and fixing holes for matching installation are also provided on both sides of the U-shaped groove (106).

7. A stepless speed-regulating gas spring according to claim 5, characterized in that: The air vent adjustment assembly (3) includes a bracket (301) mounted on a piston rod (101). A rocker (302) is rotatably mounted in the bracket (301) via a pin. One end of the rocker (302) extends into the U-shaped groove (106) and rests on a slender rod (104) for pressing the slender rod (104) down.

8. The stepless speed regulating gas spring according to claim 1, characterized in that: The air vent adjustment assembly (3) also includes a steel cable (303) connected to the outer end of the rocker (302); A spring hose (305) is also installed on the top of the bracket (301). A handle (306) is connected to the free end of the spring hose (305). A steel cable (303) passes through the top of the bracket (301) and slides through the spring hose (305). A return spring (304) is also installed between the outer end of the rocker (302) and the top wall of the bracket (301). The return spring (304) is sleeved on the outer ring of the steel cable (303).

9. A stepless speed-regulating gas spring according to claim 8, characterized in that: The handle (306) is hollow inside and has an adjustment groove on its side. A bolt (307) is slidably installed in the adjustment groove. The top end of the steel cable (303) extends into the handle (306) and is fixedly connected to the bolt (307).

10. A stepless speed-regulating gas spring according to claim 2, characterized in that: The outer cavity (2011) is also provided with a balancing component (4), which includes a piston ring (401) that is sealed and slidably disposed in the outer cavity (2011), and a balancing spring (402) is also installed between the top of the piston ring (401) and the upper plug (203).

Images