Air bag type accumulator

Abstract

The gas bag type accumulator of the present invention includes: a housing member having a housing body in a cylindrical shape with an upper portion and a lower portion open, an upper cap coupling portion and a lower cap coupling portion formed at the upper end and the lower end of the housing body, respectively; a gas bag member having a gas bag housed inside the housing body and a gas bag rod connected to the upper portion of the gas bag; a gas valve adapter member coupled to the gas bag rod to inject a gas into the inside of the gas bag; an upper cap member coupled to the upper portion of the housing member, having an upper cap body with an upper cap main portion having a seal housing groove in which a seal portion is housed formed at a portion of the outer diameter front end and a threaded portion formed at the outer diameter rear end portion, and a lock nut to couple the upper cap body and the gas bag rod to each other; and a lower cap member coupled to the lower portion of the housing member, having a lower cap body including a lower cap main portion having a hydraulic oil vertical through hole formed in the center inside along the vertical direction and at least one hydraulic oil horizontal through hole connected to a portion of the hydraulic oil vertical through hole along the horizontal direction and passing through to the outer diameter, a seal housing groove in which a seal portion is housed formed at a portion of the outer diameter of the front end, and a threaded portion formed at the outer diameter rear end portion, and a gap portion formed at the front end of the lower cap main portion with a diameter reduced to be smaller than the diameter of the lower cap main portion, thereby allowing the hydraulic oil to pass between the lower cap coupling portion, and an oil port formed at the rear surface center portion of the lower cap main portion to be connected to the hydraulic oil vertical through hole.

Description

Technical Field

[0001] This invention relates to a bladder-type accumulator, and more specifically, to a bladder-type accumulator for a hydraulic device that stores the energy of hydraulic oil as working fluid, wherein a bag-shaped bladder in the form of a balloon, which is a telescopic body, is built into the main body. Background Technology

[0002] An accumulator is a device that stores the energy of hydraulic oil in a hydraulic system. It is used to release the stored pressure when the hydraulic system needs to intermittently or instantaneously increase the pressure during operation, or to absorb the surge pressure caused by the rapid opening and closing of the hydraulic circuit, or to compensate for the volume change of hydraulic oil caused by leakage or temperature changes.

[0003] The basic structure of this accumulator consists of a body that serves as a container for storing hydraulic oil and an oil port that connects the hydraulic circuit to the body. Inside the body, there is a pressurization unit that applies a specified pressure to the hydraulic oil. The pressurization unit is generally a bladder-type accumulator that has a built-in air bladder that expands as a telescopic body by the pressure of gas such as nitrogen.

[0004] As a prior art related to this type of airbag accumulator, the following prior art document is Korean Patent Publication No. 10-2408007, entitled "Airbag Type Accumulator".

[0005] The aforementioned prior art can only be found in the corresponding patent grant publication. Figure 2 The prior art shown here has a body 10 with both ends having an oblong or elliptical cross-section with curved surfaces, thereby solving the problem in the following way, as in the corresponding patent grant publication. Figures 6 to 8 As shown, the accumulator body 10, which is a U-shaped descriptor, is combined with the closing plate 20, and the shaped body 30 with the curved concave portion 31 is inserted into the interior of the body 10, thereby enabling the telescopic body 11 built into the accumulator to work.

[0006] However, the existing technology only improves the curved surface of the upper part of the body, and the problems caused by the formation of the curved surface of the lower part of the body still exist. Furthermore, there are inconveniences in adding a shaped body 30 with a curved recess 31 to expand the contact surface between the internal surfaces of the body 10 and disperse the impact when the telescopic body 11 rapidly recovers and expands, and to incorporating it inside the body 10 for use. Moreover, as in the present invention… Figure 1As shown, in existing pneumatic accumulators, including the aforementioned prior art, when the gas filling pressure is too high, the pneumatic accumulator, which acts as a telescopic body to allow hydraulic oil to flow in and out, will continuously and excessively strike the upper part of the oil valve (or poppet valve) with a large upward height difference and elastic protrusion, potentially causing severe damage. In severe cases, such as... Figure 2 As shown, the airbag was caught in the lower part of the oil valve and damaged due to the jamming caused by the delayed descent and closure of the oil valve, which led to accumulator malfunction and damage. Summary of the Invention

[0007] Technical issues Therefore, the problem to be solved by the present invention is to provide an airbag-type accumulator that greatly simplifies the structure of the upper and lower parts of the outer casing of the main body, thereby saving manufacturing, assembly, and maintenance time and costs.

[0008] Furthermore, another problem to be solved by the present invention is to provide an airbag-type accumulator that does not require the addition of a shaped body with a curved recess inside the body serving as the outer casing, thereby saving manufacturing, assembly, and maintenance time and costs.

[0009] Furthermore, another technical problem to be solved by the present invention is to provide a bladder-type accumulator that, when the gas filling pressure is excessive, can also prevent sudden damage caused by continuous excessive impact on the upper part of the oil valve, which has a large height difference with the air bladder as a telescopic body and is elastically prominent, or damage caused by the oil valve's stuck operation, thereby preventing malfunction and damage of the accumulator.

[0010] Technical solution An embodiment of the present invention provides a bladder-type accumulator comprising: an outer casing component having an outer casing body, an upper cover joint, and a lower cover joint; the outer casing body being a cylindrical shape open at the top and bottom; the upper cover joint having a threaded portion at the upper end of the outer casing body; and the lower cover joint having a threaded portion at the lower end of the outer casing body; a bladder component having an airbag housed within the outer casing body and an airbag rod connected to the upper part of the airbag; a gas valve adapter component, coupled to the airbag rod, for injecting gas into the airbag; and an upper cover component, coupled to the upper part of the outer casing component housing the airbag component, having an upper cover body and a locking nut; the upper cover body having an upper cover main body portion; the upper cover main body portion having a sealing receiving groove for receiving a sealing portion formed at a portion of the front end of its outer diameter, and a threaded portion formed at the rear end of its outer diameter portion that engages with the threaded portion formed in the upper cover joint by rotation. The locking nut engages the upper cover body with the airbag rod; and the lower cover component, engaged with the lower part of the outer cover component, has a lower cover body and an oil port. The lower cover body includes a lower cover main body and a gap portion. The lower cover main body has a vertical hydraulic oil passage hole formed in the center, and at least one horizontal hydraulic oil passage hole connected in the horizontal direction to a portion of the vertical hydraulic oil passage hole and extending to the outer diameter. A sealing receiving groove for receiving a sealing portion is formed at a portion of the front end of the outer diameter, and a threaded portion that engages with a threaded portion formed in the lower cover engagement portion by rotation is formed at the rear end of the outer diameter. The gap portion has a diameter that is slightly reduced to less than the diameter of the lower cover main body at the front end of the lower cover main body, thereby allowing hydraulic oil to pass through the space between the lower cover engagement portion and the gap portion. The oil port is formed at the center of the rear surface of the lower cover main body for connection to the vertical hydraulic oil passage hole.

[0011] The upper cover component may also have an inwardly recessed curved surface formed on the front surface of the upper cover body.

[0012] The lower cover component may also have a curved surface that protrudes around the periphery of the gap.

[0013] The upper cover component may also include multiple locking washers and locking bolts, which are attached to a portion of the rear surface of the upper cover body. By horizontal rotation, the protruding end portion is inserted into a portion of the threaded portion that is fastened to the upper cover joint. The lower cover component also includes multiple locking washers and locking bolts, which are attached to a portion of the rear surface of the lower cover body. By horizontal rotation, the protruding end portion is inserted into a portion of the threaded portion that is fastened to the lower cover joint.

[0014] The width of the space between the lower cover joint and the gap can be from 0.1 mm to 5 mm.

[0015] The upper cover component may also include a nameplate, which is engaged with the rear end of the upper cover body via the locking nut in a manner that accommodates the airbag rod.

[0016] On the other hand, another embodiment of the airbag accumulator of the present invention includes: an outer cover component having an outer cover body, an upper cover joint portion, and a lower cover joint portion, the outer cover body being a cylindrical shape with an open upper and lower portion, the upper cover joint portion having a threaded portion formed at the upper end of the outer cover body, and the lower cover joint portion having a threaded portion formed at the lower end of the outer cover body; an airbag component having an airbag housed inside the outer cover body and an airbag rod connected to the upper part of the airbag; a gas valve adapter component, coupled to the airbag rod, for injecting gas into the interior of the airbag; an upper cover component, coupled to the upper part of the outer cover component housing the airbag component, having an upper cover body and a locking nut, the upper cover body having an upper cover main body portion, the upper cover main body portion having a sealing receiving groove for receiving a sealing portion formed at a portion of the front end of the outer diameter, and a threaded portion formed at the rear end of the outer diameter portion that engages with the threaded portion formed in the upper cover joint portion by rotation, the locking nut causing the upper cover... The cover body is joined to the airbag rod; and the lower cover component is joined to the lower part of the outer cover component, including an oil port, a lower cover body, and a hydraulic oil through adapter component. The oil port has a hydraulic oil vertical through hole formed along the internal vertical direction. The lower cover body has a lower cover main body. The lower cover main body has a spacer portion that extends through the center portion above the hydraulic oil vertical through hole. The hydraulic oil through adapter component is joined and housed in the spacer portion and has a threaded portion formed at the lower part and a hydraulic oil through adapter body formed at the upper part. The overall cross-section is "T" shaped to form a spacer portion between it and the lower cover main body to allow hydraulic oil to pass through. The threaded portion has a first hydraulic oil through hole that communicates with the hydraulic oil vertical through hole along the vertical direction. The hydraulic oil through adapter body has at least one second hydraulic oil through hole that communicates with the first hydraulic oil through hole and extends horizontally to the outer diameter.

[0017] The upper cover component may also have an inwardly recessed curved surface formed on the front surface of the upper cover body.

[0018] The lower cover component may also have a curved surface protruding around the periphery of the gap.

[0019] The upper cover component may also include multiple locking washers and locking bolts, which are attached to a portion of the rear surface of the upper cover body. By horizontal rotation, the protruding end portion is inserted into a portion of the threaded portion that is fastened to the upper cover joint. The lower cover component also includes multiple locking washers and locking bolts, which are attached to a portion of the rear surface of the lower cover body. By horizontal rotation, the protruding end portion is inserted into a portion of the threaded portion that is fastened to the lower cover joint.

[0020] Preferably, the width of the space separating the lower cover body and the hydraulic oil through the adapter body is 0.1 mm to 5 mm.

[0021] The upper cover component may also include a nameplate, which is engaged with the rear end of the upper cover body via the locking nut in a manner that accommodates the airbag rod.

[0022] The effects of the invention As described above, the airbag accumulator according to the present invention has the following advantages: the upper and lower portions of the outer casing of the main body are simplified structures that do not require the formation of curved surfaces, thus saving manufacturing and assembly time and maintenance time and costs for component inspection and replacement.

[0023] Furthermore, according to the airbag accumulator of the present invention, the present invention has the following advantages: it eliminates the need to manufacture a shape with curved recesses inside the body that serves as the outer cover, thereby allowing the curved surfaces to be formed directly on the inner surfaces of the upper cover component and the lower cover component, which saves manufacturing and assembly time and maintenance time and costs for component inspection and replacement.

[0024] Furthermore, according to the airbag accumulator of the present invention, the present invention has the following advantageous effects: it has a simple structure for the inflow and outflow of hydraulic oil, even if the oil valve with a large height difference and prominent elasticity is removed, thereby preventing damage caused by the sudden damage or jamming of the airbag as a telescopic body when the gas filling pressure is too high, thereby preventing malfunction and breakage of the accumulator. Attached Figure Description

[0025] Figure 1 and Figure 2 These are diagrams illustrating the malfunctioning state of existing pneumatic accumulators due to excessive gas filling.

[0026] Figure 3 This is a perspective view of the assembled airbag-type accumulator of the present invention.

[0027] Figure 4 and Figure 5 These are exploded perspective views of a bladder-type accumulator according to an embodiment of the present invention.

[0028] Figure 6 This is a cross-sectional view of a bladder-type accumulator according to an embodiment of the present invention.

[0029] Figure 7 and Figure 8 They are respectively Figure 6 Enlarged views of the upper and lower parts.

[0030] Figure 9 This is a diagram showing the normal operating state of a gas-filled accumulator according to an embodiment of the present invention when the gas is overfilled.

[0031] Figure 10 and Figure 11 These are exploded perspective views of a gasbag-type accumulator according to another embodiment of the present invention.

[0032] Figure 12 This is a cross-sectional view of a bladder-type accumulator according to another embodiment of the present invention.

[0033] Figure 13 for Figure 12 An enlarged view of the lower part.

[0034] Figure 14 This is a diagram showing the normal operating state of a gas-filled accumulator according to another embodiment of the present invention when the gas is overfilled.

[0035] Explanation of reference numerals in the attached figures 1, 2: Airbag accumulator; 10: Oil port connection joint. 100: Outer casing component; 110: Outer casing body 120: Upper cover joint; 122, 142, 315, 415, 451: Threaded part 124, 144: Tolerance section; 140: Lower cover joint. 200: Airbag component 210: Airbag 220: Airbag rod 230: Gas valve 250: Gas valve adapter component; 252: Gas valve adapter body 254: Airbag rod joint 255: Metal fuse; 256: Eye bolt 300: Upper cover component; 310: Upper cover body 312: Upper cover main body; 313, 413: Sealing receiving groove 314, 418: Curved surface; 320, 420: Sealing part 330, 430: Additional fixing parts for the cover; 332, 432: Locking washers 334, 434: Locking bolts; 350: Nameplate 370: Locking nut 400, 401: Lower cover component; 410, 411: Lower cover body 412: Lower cover body part; 416: Gap part 419: Oil port 450: Hydraulic oil passes through adapter component; 453: First hydraulic oil passes through hole. 455: Hydraulic oil passes through the adapter body. 457: Second hydraulic oil passes through the hole. Detailed Implementation

[0036] Specific details relating to embodiments of the present invention are included in the detailed description and accompanying drawings.

[0037] The advantages, features, and methods of implementing the present invention will be described with reference to the appendix. Figure 1 As will become clearer from the detailed embodiments described below. However, the invention is not limited to the embodiments disclosed below, but can be implemented in many different forms. These embodiments are provided to complete the disclosure of the invention and to inform those skilled in the art of the full specification of the invention, which is defined by the scope of the claims.

[0038] Throughout this specification, the same reference numerals denote the same structural elements. The embodiments described herein will be illustrated with reference to the ideal perspective views, sectional views, enlarged views, and state diagrams of the invention.

[0039] First, refer to Figures 3 to 9 The following describes in detail an embodiment of the airbag accumulator 1 of the present invention.

[0040] Figure 3 This is a perspective view of the assembled airbag-type accumulator of the present invention. Figure 4 and Figure 5 These are exploded perspective views of a bladder-type accumulator according to an embodiment of the present invention. Figure 6 This is a cross-sectional view of a bladder-type accumulator according to an embodiment of the present invention. Figure 7 and Figure 8 They are respectively Figure 6 Enlarged views of the upper and lower parts. Figure 9 This is a diagram showing the normal operating state of a gas-filled accumulator according to an embodiment of the present invention when the gas is overfilled.

[0041] An embodiment of the present invention includes an airbag accumulator 1 comprising an outer cover component 100, an airbag component 200, a gas valve adapter component 250, an upper cover component 300, and a lower cover component 400.

[0042] The outer cover component 100 includes an outer cover body 110 forming a basic frame, an upper cover joint 120, and a lower cover joint 140.

[0043] The outer casing body 110 is composed of a straight cylindrical metal tube with an open upper and lower part.

[0044] The upper cover joint 120 is formed at the upper end of the outer cover body 110, and the threaded part 122 and the tolerance part 124 for ensuring tolerance during assembly are formed at a height difference and are formed sequentially from the end on the inner diameter.

[0045] The lower cover joint 140 is formed at the lower end of the outer cover body 110. The threaded portion 142 and the tolerance portion 144 for ensuring tolerance during assembly are formed at a height difference and are formed sequentially from the end on the inner diameter.

[0046] As described above, the outer cover body 110 is formed from an open, straight cylindrical metal tube. The upper cover joint 120 and the lower cover joint 140 are formed into threaded portions 122 and 142 and tolerance portions 124 and 144 with internal threads by a simple metal processing method. Therefore, the manufacturing is extremely simple and saves time and money.

[0047] The airbag component 200 is housed inside the outer casing body 110 and includes an airbag 210, an airbag rod 220, and a gas valve 230. The airbag 210 is made of rubber and stores or releases fluid energy through contraction and expansion. The airbag rod 220 has external threads, and the gas valve 230 is connected to the end of the airbag rod 220. The structure of the airbag component 200 is the same as that of the prior art, so detailed description will be omitted.

[0048] The gas valve adapter component 250 is connected to the airbag rod 220 at the upper part of the airbag component 200, and injects gas into the airbag 210 through the gas valve 230. For this purpose, the gas valve adapter component 250 forms an airbag rod connection portion 254 with internal threads at one end, and a metal fuse 255 is provided inside. In the event of a fire, the fuse melts and opens the gas valve 230, which can be elastically opened to release the injected gas to the outside. At the other end, the gas valve adapter body 252 is formed, which is detachably connected to the gas valve adapter body 252 for easy handling during transportation.

[0049] The structure of the gas valve adapter component 250 is the same as that of the prior art, so detailed additional descriptions will be omitted.

[0050] The upper cover component 300 is attached to the upper part of the outer cover component 100, which houses the airbag component 200, and seals the upper part of the outer cover component 100, thereby protecting the airbag 210 and maintaining the internal pressure of the outer cover body 110. For this purpose, the upper cover component 300 includes an upper cover body 310, a sealing part 320, a cover additional fixing component 330, a nameplate 350, and a locking nut 370.

[0051] The upper cover body 310 includes an upper cover main body 312, a sealing receiving groove 313, a curved surface 314, and a threaded part 315.

[0052] The upper cover body 312 has a through hole H1 for the airbag rod in the center, a sealing receiving groove 313 in the front part of the outer diameter, and a threaded part 315 formed by external threads in the rear part of the outer diameter. It can be easily engaged with the threaded part 122 formed in the upper cover joint 120 by rotation. Furthermore, the front surface is provided with an inwardly recessed curved surface 314, which amplifies the contact between the curved surface 314 and the upper surface of the airbag 210 when the airbag rod 220 is received through the airbag rod through hole H1. When they collide, the impact is dispersed and the working oil is prevented from flowing out.

[0053] The sealing part 320 is formed as an O-ring, which is received and engaged in the sealing receiving groove 313 and contacts a portion of the upper inner diameter of the outer cover body 110, thereby maintaining the internal pressure of the outer cover body 110 and preventing unnecessary external leakage of hydraulic oil.

[0054] The cover additional fixing component 330 includes a plurality of locking washers 332 and locking bolts 334, which engage with a plurality of locking washer engagement holes h1 formed on the rear surface of the upper cover body 310. A protruding end portion is inserted into a portion of the threaded portion 122 of the upper cover engagement portion 120 and fastened thereto by horizontal rotation. Preferably, a groove corresponding to the shape of the end portion is also formed in a portion of the threaded portion 122 to facilitate smooth insertion and fastening of the end portion protruding based on the horizontal rotation of the locking washers 332.

[0055] The additional fixing component 330 provides additional fixing force to prevent the upper cover body 310, which is rotatably connected to the upper cover joint 120, from loosening due to vibration or impact.

[0056] The nameplate 350 is formed in the shape of a disc with a through hole H1 for the airbag rod in the center, and is attached to the rear end of the upper cover body 310 by a locking nut 370 in a state of receiving the airbag rod 220.

[0057] The nameplate 350 provides space for marking product information and protects the rear surface of the upper cover body 310.

[0058] The lower cover component 400 is attached to the lower part of the outer cover component 100 that houses the airbag component 200 and seals the lower part of the outer cover component 100. It is connected to the oil port connector 10 to provide a passage for hydraulic oil to flow into or out of the outer cover body 110.

[0059] Therefore, the lower cover component 400 includes a lower cover body 410, a sealing part 420, and a cover additional fixing part 430.

[0060] The lower cover body 410 includes a lower cover main body 412, a sealing receiving groove 413, a threaded part 415, a gap part 416, a curved part 418, and an oil port 419.

[0061] The lower cover body 412 has internally formed a vertical hydraulic oil passage H2 extending towards the center and inward to the oil port 419, and a plurality of horizontal hydraulic oil passages H3 connected horizontally to the upper part of the vertical hydraulic oil passage H2 and extending to the outer diameter. This embodiment is not limited to this, and four horizontal hydraulic oil passages H3 are formed at 90-degree intervals in the horizontal direction.

[0062] A sealing receiving groove 413 is formed at the center of the outer diameter of the lower cover body 412, and a threaded portion 415 formed by external threads is formed at the rear end of the outer diameter. The threaded portion 142 formed in the lower cover joint 140 can be easily engaged with each other by rotation.

[0063] A diameter slightly reduced to less than that of the lower cover body 412 is formed at the front end of the lower cover body 412, thereby allowing hydraulic oil to pass through the gap 416 in the space G1 separating it from the tolerance portion 144, such as... Figure 8 As shown, the space G1 between the tolerance portion 144 and the gap portion 416 is not limited to this. Preferably, the width is 0.1 mm to 5 mm to prevent jamming when the gas is overfilled. Taking into account the type of hydraulic oil and the pressure difference between the gas and the hydraulic oil, the hydraulic oil can flow smoothly into the outer cover body 110 or out to the outside.

[0064] Furthermore, the front surface of the gap 416 is basically flat, but a curved surface 418 is additionally provided around it, such as... Figure 9 As shown, when the gas is overfilled, the corner portion comes into contact with the gentle curved surface of the airbag 210, thereby expanding the contact area and dispersing the impact when they collide. In addition, it can further prevent the airbag 210 from flowing into the gap 416.

[0065] The oil port 419 is formed to protrude outward from the center of the rear surface of the lower cover body 412 so as to connect to the hydraulic oil vertical through hole H2, thereby engaging with the oil port connection joint 10 that allows hydraulic oil to be supplied or discharged from the hydraulic oil pipe.

[0066] The sealing part 420 is formed as an O-ring and contacts a portion of the lower inner diameter of the outer cover body 110 in a state of being received and engaged in the sealing receiving groove 413, thereby maintaining the internal pressure of the outer cover body 110 and preventing unnecessary external leakage of hydraulic oil.

[0067] The cover addition fixing component 430 includes a plurality of locking washers 432 and locking bolts 434, which engage with a plurality of locking washer engagement holes h2 formed on the rear surface of the lower cover body 410. A protruding end portion is inserted into a portion of the threaded portion 142 of the lower cover engagement portion 140 and fastened thereto by horizontal rotation. Preferably, a groove corresponding to the shape of the end portion is also formed in a portion of the threaded portion 142 to facilitate smooth insertion and fastening of the end portion protruding based on the horizontal rotation of the locking washers 432.

[0068] The additional fixing component 430 provides additional fixing force to prevent the lower cover body 410, which is rotatably connected to the lower cover joint 140, from becoming loose due to vibration or impact.

[0069] As described above, in the airbag accumulator 1 according to an embodiment of the present invention, the upper and lower portions of the outer cover component 100 are also formed into a simplified structure that does not require the formation of curved surfaces, and the upper cover component 300 and the lower cover component 400 can be easily combined, thereby saving manufacturing and assembly time and maintenance time and costs for component inspection and replacement.

[0070] Furthermore, according to an embodiment of the present invention, the airbag accumulator 1 does not require the additional manufacture of a shape body with curved recesses for use. Instead, curved surfaces 314 and 418 can be directly formed on the inner surfaces of the upper cover component 300 and the lower cover component 400. This saves time and costs associated with manufacturing, assembly, and maintenance for component inspection and replacement.

[0071] Furthermore, according to an embodiment of the present invention, the airbag accumulator 1 has a simple structure for the inflow and outflow of hydraulic oil by eliminating the existing oil valve with a large height difference and prominent elasticity, using the lower cover member 400 without a height difference. Thus, when the gas filling pressure is too high, it prevents the airbag 210, which is a telescopic body, from being rapidly damaged or from being stuck, thereby preventing malfunction and breakage of the accumulator.

[0072] Hereinafter, with reference to another embodiment of the airbag-type accumulator 2 of the present invention, see below. Figures 10 to 14 The differences between this invention and the airbag-type accumulator 1 of an embodiment of the present invention are explained in detail.

[0073] Figure 10 and Figure 11 These are exploded perspective views of a gasbag-type accumulator according to another embodiment of the present invention. Figure 12 This is a cross-sectional view of a bladder-type accumulator according to another embodiment of the present invention. Figure 13 for Figure 12 An enlarged view of the lower part. Figure 14 This is a diagram showing the normal operating state of a gas-filled accumulator according to another embodiment of the present invention when the gas is overfilled.

[0074] The airbag accumulator 2 of another embodiment of the present invention is the same as the airbag accumulator 1 of one embodiment of the present invention, except that the lower cover component 401 is modified by adding a lower cover body 411 and the fluid passes through the adapter component 450.

[0075] That is, the lower cover body 411 forms a hydraulic oil vertical passage hole H4 along the internal vertical direction of the oil port 419 connecting the lower cover body portion 412 and the rear center portion. However, unlike one embodiment of the present invention, the plurality of hydraulic oil horizontal passage holes H3 and the gap portion 416 that connect horizontally to the upper part of the hydraulic oil vertical passage hole H4 and to the outer diameter through hole of the lower cover body portion 412 are removed. Instead, in order to allow hydraulic oil to flow in and out, a space portion with a cross-section in the shape of a "T" is formed in the upper part of the vertical passage hole H4, penetrating the center portion of the lower cover body portion 412 and forming a threaded portion in the lower part. A hydraulic oil passage adapter component 450 is added here.

[0076] The hydraulic oil through adapter component 450 has an overall shape including a lower threaded portion 451 with a "T"-shaped cross-section and an upper hydraulic oil through adapter body 455, so as to be accommodated in the spaced space.

[0077] The threaded portion 451 internally forms a first hydraulic oil through hole 453 that communicates with the hydraulic oil through hole H4 in the vertical direction.

[0078] The hydraulic oil passes through the adapter body 455, which is not limited to this, and has four second hydraulic oil passage holes 457 that are set at a 90-degree angle to the outer diameter along the horizontal direction connected to the first hydraulic oil passage hole 453.

[0079] Through the engagement of the threaded portion 451, such as Figure 13 As shown, the hydraulic oil passes through the space G2 between the adapter component 450 and the lower cover body 412, which is not limited to this. Preferably, the width is 0.1 mm to 5 mm to prevent jamming when the gas is overfilled. Taking into account the type of hydraulic oil and the pressure difference between the gas and the hydraulic oil, the hydraulic oil can flow smoothly into the outer cover body 110 or out to the outside.

[0080] Based on the inflow and outflow paths of hydraulic oil, one embodiment of the present invention can be defined as a side type, and another embodiment can be defined as a center type.

[0081] The airbag accumulator 2 of another embodiment of the present invention can achieve the advantageous effects of the airbag accumulator 1 of the present invention. Moreover, even when hydraulic oil is used to pass through the adapter component 450, it will be fixed at a height with almost no height difference from the upper surface of the lower cover body 412. Therefore, even if it is continuously struck with the airbag 210, it can prevent the airbag 210 from being severely damaged.

[0082] The preferred embodiments of the present invention have been described above, but the scope of protection of the present invention is not limited thereto. Various modifications and improvements made by those skilled in the art based on the basic concepts of the present invention as defined in the following claims are also within the scope of protection of the present invention.

Claims

1. A pneumatic accumulator, characterized in that, include: The outer cover component has an outer cover body, an upper cover joint, and a lower cover joint. The outer cover body is a cylindrical shape with an open upper and lower part. The upper cover joint has a threaded part at the upper end of the outer cover body, and the lower cover joint has a threaded part at the lower end of the outer cover body. An airbag component has an airbag housed inside the outer cover body and an airbag rod connected to the upper part of the airbag; The gas valve adapter component, which is combined with the airbag rod, injects gas into the interior of the airbag; An upper cover component, joined to the upper part of the outer cover component housing the airbag component, has an upper cover body and a locking nut. The upper cover body has an upper cover main body portion. The upper cover main body portion has a sealing receiving groove formed at the front end of its outer diameter to receive a sealing portion, and a threaded portion formed at the rear end of its outer diameter to engage with a threaded portion formed at the upper cover joint portion by rotation. The locking nut engages the upper cover body and the airbag rod with each other. A lower cover component, attached to the lower part of the outer cover component, has a lower cover body and an oil port. The lower cover body includes a lower cover main body and a gap portion. The lower cover main body has a vertical hydraulic oil passage hole formed in the center, and at least one horizontal hydraulic oil passage hole connected in the horizontal direction to a portion of the vertical hydraulic oil passage hole and extending to the outer diameter. A sealing receiving groove for receiving a sealing portion is formed at a portion of the front end of the outer diameter, and a threaded portion is formed at the rear end of the outer diameter, which engages with a threaded portion formed in the lower cover joint by rotation. The gap portion has a diameter that is slightly reduced to less than the diameter of the lower cover main body at the front end of the lower cover main body, thereby allowing hydraulic oil to pass through the space between the lower cover joint and the gap portion. The oil port is formed at the center of the rear surface of the lower cover main body for connection to the vertical hydraulic oil passage hole.

2. The airbag-type accumulator according to claim 1, characterized in that, The upper cover component also has an inwardly recessed curved surface on the front surface of the upper cover body.

3. The airbag-type accumulator according to claim 1, characterized in that, The lower cover component also has a curved surface that protrudes around the periphery of the gap.

4. The airbag-type accumulator according to claim 1, characterized in that, The upper cover component also includes multiple locking washers and locking bolts, which are engaged with a portion of the rear surface of the upper cover body. By horizontal rotation, the protruding end portion is inserted into a portion of the threaded portion that is fastened to the upper cover joint. The lower cover component also includes multiple locking washers and locking bolts, which are attached to a portion of the rear surface of the lower cover body. By horizontal rotation, the protruding end portion is inserted into a portion of the threaded portion that is fastened to the lower cover joint.

5. The airbag-type accumulator according to claim 1, characterized in that, The width of the space between the lower cover joint and the gap is 0.1 mm to 5 mm.

6. The airbag-type accumulator according to claim 1, characterized in that, The upper cover component also includes a nameplate, which is engaged with the rear end of the upper cover body via the locking nut in a manner that accommodates the airbag rod.

7. A pneumatic accumulator, characterized in that, include: The outer cover component has an outer cover body, an upper cover joint, and a lower cover joint. The outer cover body is a cylindrical shape with an open upper and lower part. The upper cover joint has a threaded portion at the upper end of the outer cover body, and the lower cover joint has a threaded portion at the lower end of the outer cover body. An airbag component has an airbag housed inside the outer cover body and an airbag rod connected to the upper part of the airbag; The gas valve adapter component, which is combined with the airbag rod, injects gas into the interior of the airbag; An upper cover component, joined to the upper part of the outer cover component housing the airbag component, has an upper cover body and a locking nut. The upper cover body has an upper cover main body portion. The upper cover main body portion has a sealing receiving groove formed at the front end of its outer diameter to receive a sealing portion, and a threaded portion formed at the rear end of its outer diameter to engage with a threaded portion formed at the upper cover joint portion by rotation. The locking nut engages the upper cover body and the airbag rod with each other. The lower cover component, attached to the lower part of the outer cover component, includes an oil port, a lower cover body, and a hydraulic oil passage adapter component. The oil port has a hydraulic oil vertical passage hole formed along the internal vertical direction. The lower cover body has a lower cover main body portion. The lower cover main body portion has a spacer portion extending through the center portion formed above the hydraulic oil vertical passage hole. The hydraulic oil passage adapter component is attached and housed in the spacer portion and has a threaded portion formed at the lower part and a hydraulic oil passage adapter body formed at the upper part. The overall cross-section is "T" shaped to form a spacer portion between it and the lower cover main body portion to allow hydraulic oil to pass through. The threaded portion has a first hydraulic oil passage hole formed inside, which communicates with the hydraulic oil vertical passage hole along the vertical direction. The hydraulic oil passage adapter body has at least one second hydraulic oil passage hole, which communicates with the first hydraulic oil passage hole and extends horizontally to the outer diameter.

8. The airbag-type accumulator according to claim 7, characterized in that, The upper cover component also has an inwardly recessed curved surface on the front surface of the upper cover body.

9. The airbag-type accumulator according to claim 7, characterized in that, The lower cover component also has a curved surface that protrudes around the periphery of the gap.

10. The airbag-type accumulator according to claim 7, characterized in that, The upper cover component also includes multiple locking washers and locking bolts, which are engaged with a portion of the rear surface of the upper cover body. By horizontal rotation, the protruding end portion is inserted into a portion of the threaded portion that is fastened to the upper cover joint. The lower cover component also includes multiple locking washers and locking bolts, which are attached to a portion of the rear surface of the lower cover body. By horizontal rotation, the protruding end portion is inserted into a portion of the threaded portion that is fastened to the lower cover joint.

11. The airbag-type accumulator according to claim 7, characterized in that, The width of the space separating the lower cover body and the hydraulic oil through the adapter body is 0.1 mm to 5 mm.

12. The airbag-type accumulator according to claim 7, characterized in that, The upper cover component also includes a nameplate, which is engaged with the rear end of the upper cover body via the locking nut in a manner that accommodates the airbag rod.

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