Double-air-cavity energy accumulator, single-air-cavity energy accumulator and piston for energy accumulators

Abstract

The utility model belongs to the technical field of shock absorbers, and particularly relates to a double-air-cavity energy accumulator, a single-air-cavity energy accumulator and a piston for the energy accumulators. The two pistons are arranged in the cylinder body so as to divide the space in the cylinder body into a low-pressure cavity, an oil cavity and a high-pressure cavity; the two end cover assemblies are respectively connected with the corresponding cylinder openings, and each end cover assembly comprises a cylinder bottom and a gland; the double-air-cavity energy accumulator is characterized in that the end cover assembly is provided with a cylinder bottom and a cylinder opening, the inner wall of the cylinder opening is provided with a first annular boss, the side wall of the cylinder bottom is provided with a second annular boss abutting against the first annular boss, and according to the double-air-cavity energy accumulator, the end cover assembly designed in a split mode is adopted, firstly, the cylinder bottom abuts against the first annular boss in the cylinder opening; and then the pressing cover is in threaded connection with the barrel opening to press the cylinder bottom, that is, the abutting face of the first annular boss serves as a reference face, the cylinder bottom and the first annular boss only need to be attached, other extra action cooperation is avoided, and the perpendicularity between the cylinder bottom and the cylinder body is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of shock absorber, specifically relates to the shock absorber using gas and liquid, and especially relates to a double-gas-cavity energy accumulator, a single-gas-cavity energy accumulator and a piston for energy accumulator. BACKGROUND

[0002] The energy accumulator is widely applied on vehicles due to its excellent characteristics of absorbing impact and storing energy; when the vehicle passes through the road with pits and ruggedness, the impact pressure in the suspension oil cylinder is high, the impact pressure is transmitted to the energy accumulator and is absorbed by the gas in the gas cavity, and then the impact is reduced.

[0003] The energy accumulator generally includes a cylinder body, a piston is arranged in the cylinder body, and then an end cover is connected with the cylinder body to lock the piston in the cylinder body; in the related art, the end cover is generally an integral part and is directly connected with the barrel mouth of the cylinder body.

[0004] However, since the end cover needs to be connected with the barrel mouth, there is a gap in the matching size, and the gap causes the inner end face of the end cover to have poor perpendicularity with the inner chamber of the cylinder body, so that the piston has a certain probability of being stuck when impacting the inner end face of the end cover.

[0005] Therefore, how to solve the poor perpendicularity between the inner end face of the end cover and the inner chamber of the cylinder body when the end cover is installed is a technical problem that needs to be solved by the person skilled in the art.

[0006] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background of the present application, and therefore, the above description is not considered as information of the prior art. CONTENT OF THE UTILITY MODEL

[0007] The present application provides at least a double-gas-cavity energy accumulator, a single-gas-cavity energy accumulator and a piston for energy accumulator.

[0008] In a first aspect, the present application provides a double-gas-cavity energy accumulator, which includes: a cylinder body, both ends of which are barrel mouths; two pistons, each of which is arranged in the cylinder body to divide the space in the cylinder body into a low-pressure cavity, an oil cavity and a high-pressure cavity; and two end cover assemblies, each of which is connected with a corresponding barrel mouth and includes: a cylinder bottom and a gland; wherein the inner wall of the barrel mouth is provided with a first annular boss, the side wall of the cylinder bottom is provided with a second annular boss which abuts against the first annular boss; the cylinder bottom is arranged on the first annular boss, and the gland is threadedly connected with the barrel mouth to press the second annular boss of the cylinder bottom.

[0009] In an optional embodiment, an air inlet is formed on each of the two cylinder bottoms; and an oil inlet is formed in the side wall of the cylinder body and communicates with the oil cavity.

[0010] In an alternative embodiment, the cylinder bottom is provided with a gas filling valve connected to the gas inlet; and the gas filling valve is provided with a plug covering the gas filling valve.

[0011] In an alternative embodiment, the side wall of each of the two pistons is provided with a first guide ring, a second guide ring, a first sealing ring and a second sealing ring; the first sealing ring is provided with at least one pressure relief hole; the first sealing ring and the second sealing ring are located between the first guide ring and the second guide ring; and the first guide ring and the first sealing ring are located close to the oil cavity.

[0012] In an alternative embodiment, the side wall of the piston connected to the high-pressure cavity is further provided with a third sealing ring; and the third sealing ring is located outside the second guide ring.

[0013] In an alternative embodiment, the side wall of the piston connected to the high-pressure cavity is further provided with a lubricating oil storage groove; and the lubricating oil storage groove is located between the second guide ring and the third sealing ring.

[0014] In a second aspect, the embodiments of the present disclosure further provide a piston for an accumulator, which comprises: a first guide ring, a second guide ring, a first sealing ring and a second sealing ring provided on the side wall of the piston; and the first sealing ring and the second sealing ring are located between the first guide ring and the second guide ring; and the first guide ring and the first sealing ring are located close to the oil cavity.

[0015] In a third aspect, the embodiments of the present disclosure further provide a piston for an accumulator, which comprises: a first guide ring, a second guide ring, a first sealing ring, a second sealing ring and a third sealing ring provided on the side wall of the piston; the first sealing ring and the second sealing ring are located between the first guide ring and the second guide ring; the first guide ring and the first sealing ring are located close to the oil cavity; and the third sealing ring is located outside the second guide ring.

[0016] In a fourth aspect, the embodiments of the present disclosure further provide a single-gas-cavity accumulator, which comprises: a cylinder body having cylinder ports at both ends; a piston as described above arranged in the cylinder body to divide the cylinder body into an oil cavity and a gas cavity; and two end cover assemblies respectively connected to the corresponding cylinder ports and each comprising: a cylinder bottom and a gland; the inner wall of the cylinder port is provided with a first annular boss; the cylinder bottom is arranged on the first annular boss; and the gland is threadedly connected to the cylinder port to press the cylinder bottom.

[0017] In an alternative embodiment, the side wall of the cylinder bottom is provided with a second annular boss; the second annular boss abuts against the first annular boss; the gland is threadedly connected to the cylinder port to press the second annular boss of the cylinder bottom; the cylinder bottom connected to the oil cavity is provided with an oil inlet; and the cylinder bottom connected to the gas cavity is provided with a gas inlet.

[0018] The utility model discloses beneficial effect is, the double air chamber energy accumulator through adopting the end cover subassembly of split type design, first the first annular boss in the cylinder bottom and cylinder mouth is resisted, then again through the gland and cylinder mouth screw thread connection to compress the cylinder bottom, namely the abutting surface of first annular boss is the datum plane, only need to fit between the cylinder bottom and first annular boss, do not have other additional action cooperation, greatly improve the perpendicularity between cylinder bottom and cylinder.

[0019] Other features and advantages of the present utility model will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the present utility model. The objects and other advantages of the present utility model will be realized and attained by the structure particularly pointed out in the description, claims and drawings.

[0020] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the text will be preferred embodiment, and cooperate with the attached drawings, make detailed description as follows. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in prior art, the following will be briefly introduced the drawings needed to be used in the specific embodiment or prior art description, obviously, the drawings in the following description is some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0022] Figure 1 The structure schematic diagram of a double air chamber energy accumulator provided by the embodiment of the present disclosure is shown in the figure.

[0023] Figure 2 The structure schematic diagram of an end cover subassembly provided by the embodiment of the present disclosure is shown in the figure.

[0024] Figure 3 The structure schematic diagram of a piston provided by the embodiment of the present disclosure is shown in the figure.

[0025] Figure 4 The structure schematic diagram of another piston provided by the embodiment of the present disclosure is shown in the figure.

[0026] Figure 5 The structure schematic diagram of a single air chamber energy accumulator provided by the embodiment of the present disclosure is shown in the figure.

[0027] Figure 6 The structure schematic diagram of another single air chamber energy accumulator provided by the embodiment of the present disclosure is shown in the figure.

[0028] Figure 7 The structure schematic diagram of a first sealing ring provided by the embodiment of the present disclosure is shown in the figure.

[0029] Figure 8A structure schematic view of a second sealing ring provided by the embodiment of the present disclosure is shown in the figure.

[0030] Figure 9 A structure schematic view of another second sealing ring provided by the embodiment of the present disclosure is shown in the figure.

[0031] Figure 10 A structure schematic view of a third sealing ring provided by the embodiment of the present disclosure is shown in the figure.

[0032] In the figure:

[0033] Cylinder body 1, low-pressure cavity 111, oil cavity 112, high-pressure cavity 113, air cavity 114, barrel mouth 12, first annular boss 121;

[0034] Piston 2, first guide ring 21, second guide ring 22, first sealing ring 23, pressure relief small hole 231, second sealing ring 24, third sealing ring 25, lubricating oil storage groove 26;

[0035] End cover assembly 3, cylinder bottom 31, second annular boss 311, air inlet 312, oil inlet 313, inner end face 314, gland 32;

[0036] Air charging valve 4;

[0037] Plug 5. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.

[0040] Some embodiments of the present application will be described in detail below in conjunction with the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0041] As Figure 1As shown, at least one embodiment provides a double air chamber energy accumulator, which comprises: a cylinder body 1, both ends of which are cylinder ports 12; two pistons 2, each of which is arranged in the cylinder body 1 to divide the space in the cylinder body 1 into a low-pressure chamber 111, an oil chamber 112 and a high-pressure chamber 113; and two end cover assemblies 3, each of which is connected with a corresponding cylinder port 12 and each of which comprises: a cylinder bottom 31 and a gland 32; wherein the inner wall of the cylinder port 12 is provided with a first annular boss 121, and the side wall of the cylinder bottom 31 is provided with a second annular boss 311 abutting against the first annular boss 121; the cylinder bottom 31 is arranged on the first annular boss 121, and the gland 32 is threadedly connected with the cylinder port 12 to press the second annular boss 311 of the cylinder bottom 31.

[0042] Specifically, the oil chamber 112 of the cylinder body 1 is connected with a suspension hydraulic system, and the low-pressure chamber 111 and the high-pressure chamber 113 are respectively filled with gas at a certain pressure, wherein the gas pressure in the high-pressure chamber 113 is greater than that in the low-pressure chamber 111, so that the piston 2 on the side of the low-pressure chamber 111 is more easily compressed and moved; when the suspension system is excited by an external excitation to generate an impact pressure, the oil enters the oil chamber 112 to increase the volume of the oil chamber 112, so as to drive the two pistons 2 to move towards the corresponding cylinder bottom 31, thereby compressing the gas in the low-pressure chamber 111 and the gas in the high-pressure chamber 113, and thus playing a function of absorbing the impact.

[0043] In the present embodiment, the end cover assembly 3 is designed in a split type, the cylinder bottom 31 is first abutted against the first annular boss 121 in the cylinder port 12, and then the gland 32 is threadedly connected with the cylinder port 12 to press the cylinder bottom 31, that is, the abutting surface of the first annular boss 121 is a reference surface, and the cylinder bottom 31 only needs to be fitted with the first annular boss 121 without other additional action cooperation, so that the perpendicularity between the cylinder bottom 31 and the cylinder body 1 is greatly improved.

[0044] Meanwhile, the surface of the first annular boss 121 is a reference surface of the cylinder body 1, and the surface of the second annular boss 311 facing the first annular boss 121 is a reference surface of the cylinder bottom 31, the two reference surfaces are fitted, and the cooperation degree is extremely high, so that only the inner end surface 314 of the cylinder bottom 31 needs to be parallel to the reference surface of the cylinder bottom 31, and thus the perpendicularity between the inner end surface 314 and the cylinder body 1 can be ensured.

[0045] As shown in some embodiments, the two cylinder bottoms 31 are each provided with an air inlet 312; and the side wall of the cylinder body 1 is provided with an oil inlet 313 communicating with the oil chamber 112. Figure 1

[0046] In some embodiments, the cylinder bottom 31 is provided on the outside thereof with an air charging valve 4 connected with the air inlet 312; and the air charging valve 4 is provided on the outside thereof with a plug 5 covering the air charging valve 4.

[0047] As shown in some embodiments, the two cylinder bottoms 31 are each provided with an air inlet 312; and the side wall of the cylinder body 1 is provided with an oil inlet 313 communicating with the oil chamber 112. Figure 3 ​As shown, in some embodiments, the low-pressure chamber 111 uses a piston 2, and its sidewall is provided with a first guide ring 21, a second guide ring 22, a first sealing ring 23, and a second sealing ring 24; wherein the first sealing ring 23 is provided with at least one pressure relief hole 231; the first sealing ring 23 and the second sealing ring 24 are located between the first guide ring 21 and the second guide ring 22, and the first guide ring 21 and the first sealing ring 23 are located close to the oil chamber 112.

[0048] In this embodiment, the first sealing ring 23 adopts the following... Figure 7 The sealing rings shown are mainly used to resist oil impact and reduce most of the hydraulic pressure. The first sealing ring 23 has a pressure relief hole 231 to prevent pressure trapping between the first sealing ring 23 and the second sealing ring 24, which could lead to seal failure. The second sealing ring 24 adopts the following... Figure 8 The sealing ring shown or as Figure 9 The sealing ring shown is mainly used to seal gases and liquids, preventing the liquid from exchanging with other substances.

[0049] like Figure 4 As shown, in some embodiments, the high-pressure chamber 113 uses a piston 2, and its sidewall is provided with a first guide ring 21, a second guide ring 22, a first sealing ring 23, a second sealing ring 24, a third sealing ring 25, and a lubricating oil storage tank 26; wherein the first sealing ring 23 and the second sealing ring 24 are located between the first guide ring 21 and the second guide ring 22, and the first guide ring 21 and the first sealing ring 23 are located close to the oil chamber 112; the third sealing ring 25 is located outside the second guide ring 22; the lubricating oil storage tank 26 is formed between the second guide ring 22 and the third sealing ring 25.

[0050] In this embodiment, the first sealing ring 23 adopts the following... Figure 7 The sealing rings shown are mainly used to resist oil impact and reduce most of the hydraulic pressure. The first sealing ring 23 has a pressure relief hole to prevent pressure trapping between the first sealing ring 23 and the second sealing ring 24, which could lead to seal failure. The second sealing ring 24 adopts... Figure 8 The sealing ring shown or as Figure 9 The sealing ring shown is mainly used to seal gases and liquids, preventing the liquid from exchanging with other substances; the third sealing ring 25 adopts... Figure 10 The sealing ring shown is a single-lip sealing ring 25 with a retaining ring at the tail, which has a good sealing performance for gas increase under high impact. Because it has a retaining ring, its pressure resistance is also particularly high. With the second sealing ring 24 and the third sealing ring 25 sealing together, the high pressure and high impact gas will not enter the oil cavity 112, ensuring the service life under harsh working conditions.

[0051] In some embodiments, the sealing ring is disposed in a corresponding annular groove on the side wall of the piston 2.

[0052] As shown in Figure 3 , at least one embodiment provides a kind of piston for energy accumulator, it includes: the side wall of piston 2 is provided with first guide ring 21, second guide ring 22, first sealing ring 23 and second sealing ring 24;Wherein first sealing ring 23 and second sealing ring 24 are located between first guide ring 21 and second guide ring 22, and first guide ring 21 and first sealing ring 23 are close to oil cavity 112 arrangement.

[0053] In the present embodiment, first sealing ring 23 adopts the sealing ring as shown in Figure 7 , mainly used to resist oil impact, reduce most hydraulic pressure, first sealing ring 23 with pressure relief small hole, avoid the space between first sealing ring 23 and second sealing ring 24 to produce pressure, cause sealing failure;Second sealing ring 24 adopts the sealing ring as shown in Figure 8 Or the sealing ring as shown in Figure 9 , mainly used to seal gas and liquid, prevent liquid and other mutual exchange.

[0054] As shown in Figure 4 , at least one embodiment provides a kind of piston for energy accumulator, it includes: the side wall of piston 2 is provided with first guide ring 21, second guide ring 22, first sealing ring 23, second sealing ring 24 and third sealing ring 25;Wherein first sealing ring 23 and second sealing ring 24 are located between first guide ring 21 and second guide ring 22, and first guide ring 21 and first sealing ring 23 are close to oil cavity 112 arrangement;Third sealing ring 25 is located outside second guide ring 22.

[0055] In the present embodiment, first sealing ring 23 adopts the sealing ring as shown in Figure 7 , mainly used to resist oil impact, reduce most hydraulic pressure, first sealing ring 23 with pressure relief small hole, avoid the space between first sealing ring 23 and second sealing ring 24 to produce pressure, cause sealing failure;Second sealing ring 24 adopts the sealing ring as shown in Figure 8 Or the sealing ring as shown in Figure 9 , mainly used to seal gas and liquid, prevent liquid and other mutual exchange;Third sealing ring 25 adopts the sealing ring as shown in Figure 10 , third sealing ring 25 is single-lip sealing ring, and tail part is provided with baffle, and it has good sealing performance to the gas under high impact, because it is provided with baffle, so its pressure resistance is particularly high;Second sealing ring 24 and third sealing ring 25 are sealed together, and high-pressure high-impact gas will not enter oil cavity 112, guarantee the service life under harsh working conditions.

[0056] As shown in Figure 5 , Figure 6As shown, at least one embodiment provides a single-chamber accumulator, which includes: a cylinder 1 with two ends being cylindrical openings 12; a piston 2 disposed inside the cylinder 1 to divide the cylinder 1 into an oil chamber 112 and an air chamber 114; and two end cap assemblies 3, respectively connected to the corresponding cylindrical openings 12, and each including: a cylinder bottom 31 and a pressure cap 32; wherein the inner wall of the cylindrical opening 12 is provided with a first annular boss 121; the cylinder bottom 31 is disposed on the first annular boss 121, and the pressure cap 32 is threadedly connected to the cylindrical opening 12 to press the cylinder bottom 31.

[0057] like Figure 2 As shown, in some embodiments, the side wall of the cylinder bottom 31 is provided with a second annular boss 311; the second annular boss 311 abuts against the first annular boss 121; the pressure cap 32 is threadedly connected to the cylinder opening 12 to press the second annular boss 311 of the cylinder bottom 31; an oil inlet 313 is provided on the cylinder bottom 31 that communicates with the oil chamber 112; and an air inlet 312 is provided on the cylinder bottom 31 that communicates with the air chamber 114.

[0058] like Figure 5 As shown, in an application scenario where pressure requirements are not high, the following method is adopted: Figure 3 The piston 2 shown has a first guide ring 21, a second guide ring 22, a first sealing ring 23, and a second sealing ring 24 on its side wall; wherein the first sealing ring 23 and the second sealing ring 24 are located between the first guide ring 21 and the second guide ring 22, and the first guide ring 21 and the first sealing ring 23 are located close to the oil cavity 112.

[0059] In this embodiment, the first sealing ring 23 adopts the following... Figure 7 The sealing rings shown are mainly used to resist oil impact and reduce most of the hydraulic pressure. The first sealing ring 23 has a pressure relief hole to prevent pressure trapping between the first sealing ring 23 and the second sealing ring 24, which could lead to seal failure. The second sealing ring 24 adopts... Figure 8 The sealing ring shown or as Figure 9 The sealing ring shown is mainly used to seal gases and liquids, preventing the liquid from exchanging with other substances.

[0060] like Figure 6 As shown, in another application scenario with high pressure requirements, the following method is adopted: Figure 4 The piston 2 shown has a first guide ring 21, a second guide ring 22, a first sealing ring 23, a second sealing ring 24, a third sealing ring 25, and a lubricating oil storage tank 26 disposed on its side wall; wherein the first sealing ring 23 and the second sealing ring 24 are located between the first guide ring 21 and the second guide ring 22, and the first guide ring 21 and the first sealing ring 23 are disposed close to the oil cavity 112; the third sealing ring 25 is located outside the second guide ring 22; and the lubricating oil storage tank 26 is formed between the second guide ring 22 and the third sealing ring 25.

[0061] In the present embodiment, the first sealing ring 23 adopts a sealing ring as shown in Figure 7 , mainly used for resisting oil impact and reducing most of the hydraulic pressure. The first sealing ring 23 is provided with a pressure relief hole 231 to avoid pressure accumulation in the space between the first sealing ring 23 and the second sealing ring 24, resulting in sealing failure. The second sealing ring 24 adopts a sealing ring as shown in Figure 8 or a sealing ring as shown in Figure 9 , mainly used for sealing gas and liquid and preventing mutual exchange of liquid and other substances. The third sealing ring 25 adopts a sealing ring as shown in Figure 10 . The third sealing ring 25 is a single-lip sealing ring with a stop ring at the tail, and has good sealing performance for high-impact gas. Because it has a stop ring, it also has particularly high pressure resistance. The high-pressure and high-impact gas cannot enter the oil cavity 112 under the joint sealing of the second sealing ring 24 and the third sealing ring 25, thereby ensuring the service life under harsh working conditions.

[0062] In summary, the double-gas-cavity accumulator adopts the split design of the end cover assembly 3. First, the cylinder bottom 31 is abutted against the first annular boss 121 in the barrel mouth 12, and then the cylinder bottom 31 is pressed by the threaded connection of the gland 32 and the barrel mouth 12. That is, the abutting surface of the first annular boss 121 is the reference surface, and the cylinder bottom 31 only needs to be fitted with the first annular boss 121 without other additional actions. This greatly improves the perpendicularity between the cylinder bottom 31 and the cylinder body 1.

[0063] In this document, when a first component is referred to as being on a second component, it can be directly formed on the second component, or a third component can be interposed between the first component and the second component.

[0064] In this document, when an element or layer is referred to as being "on", "engaged to", "connected to", "attached to", or "coupled to" another element or layer, it can be directly on, engaged, connected, attached, or coupled to the other element or layer, or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly engaged to", "directly connected to", "directly attached to", or "directly coupled to" another element or layer, there are no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., "between" versus "directly between", "adjacent" versus "directly adjacent", etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0065] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0066] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0067] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0068] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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.

[0069] In the description of the utility model, it is necessary to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, terms such as "first", "second" and other numerical terms are used in this text, and do not imply order or sequence unless the text is explicitly indicated. Therefore, the above-discussed first element, component, area, layer or section can be referred to as the second element, component, area, layer or section without departing from the teachings of the example embodiments.

[0070] Spatially relative terms, such as "internal", "external", "lower", "under", "bottom", "top", "above", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0071] In the above discussion, unless otherwise stated, the terms "about", "approximately", "substantially" and the like, when used in describing a numerical value, mean a variation of + / - 10% of the value.

[0072] With the above ideal embodiments according to the utility model as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A dual air chamber accumulator, characterized by, The application relates to a double-gas-chamber energy accumulator, which comprises the following parts: a cylinder (1) with two cylinder mouths (12); two pistons (2) arranged in the cylinder (1) to divide the space in the cylinder (1) into a low-pressure chamber (111), an oil chamber (112) and a high-pressure chamber (113); and two end cover assemblies (3) connected with the corresponding cylinder mouths (12) and each comprising a cylinder bottom (31) and a gland (32); wherein the inner wall of the cylinder mouth (12) is provided with a first annular boss (121), and the side wall of the cylinder bottom (31) is provided with a second annular boss (311) abutting against the first annular boss (121); the cylinder bottom (31) is arranged on the first annular boss (121), and the gland (32) is threadedly connected with the cylinder mouth (12) to press the second annular boss (311) of the cylinder bottom (31).

2. The double-gas-chamber energy accumulator according to claim 1, wherein the cylinder bottom (31) is provided with an air inlet (312); and the side wall of the cylinder (1) is provided with an oil inlet (313) communicating with the oil chamber (112).

3. The double-gas-chamber energy accumulator according to claim 2, wherein the cylinder bottom (31) is provided with an air charging valve (4) connected with the air inlet (312); and the air charging valve (4) is provided with a plug (5) covering the air charging valve (4).

4. The double-gas-chamber energy accumulator according to claim 1, wherein the side wall of each of the two pistons (2) is provided with a first guide ring (21), a second guide ring (22), a first sealing ring (23) and a second sealing ring (24); wherein the first sealing ring (23) is provided with at least one pressure relief hole (231); the first sealing ring (23) and the second sealing ring (24) are located between the first guide ring (21) and the second guide ring (22), and the first guide ring (21) and the first sealing ring (23) are arranged close to the oil chamber (112).

5. The double-gas-chamber energy accumulator according to claim 4, wherein the side wall of the piston (2) connected with the high-pressure chamber (113) is further provided with a third sealing ring (25); and the third sealing ring (25) is located outside the second guide ring (22).

6. The double-gas-chamber energy accumulator according to claim 5, wherein the side wall of the piston (2) connected with the high-pressure chamber (113) is further provided with a lubricating oil storage groove (26); and the lubricating oil storage groove (26) is located between the second guide ring (22) and the third sealing ring (25).

7. The double-gas-chamber energy accumulator according to claim 1, wherein the side wall of the piston (2) is provided with a first guide ring (21), a second guide ring (22), a first sealing ring (23) and a second sealing ring (24); wherein the first sealing ring (23) and the second sealing ring (24) are located between the first guide ring (21) and the second guide ring (22), and the first guide ring (21) and the first sealing ring (23) are arranged close to the oil chamber (112).

8. The double-gas-chamber energy accumulator according to claim 1, wherein the side wall of the piston (2) is provided with a first guide ring (21), a second guide ring (22), a first sealing ring (23), a second sealing ring (24) and a third sealing ring (25); wherein the first sealing ring (23) and the second sealing ring (24) are located between the first guide ring (21) and the second guide ring (22), and the first guide ring (21) and the first sealing ring (23) are arranged close to the oil chamber (112). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7. An accumulator piston characterized by ​ ​ ​ ​ 8. An accumulator piston characterized by ​ ​ The first sealing ring (23) and the second sealing ring (24) are located between the first guide ring (21) and the second guide ring (22), and the first guide ring (21) and the first sealing ring (23) are arranged close to the oil cavity (112); the third sealing ring (25) is located outside the second guide ring (22).

9. A single-gas-chamber energy accumulator, characterized by Comprise: A cylinder (1) having two ends of a cylinder port (12); A piston (2) as claimed in claim 7 or 8, arranged in the cylinder (1) to divide the cylinder (1) into an oil cavity (112) and an air cavity (114); And A two-end cover assembly (3) connected with the corresponding cylinder port (12) respectively, and each comprising: a cylinder bottom (31) and a gland (32); wherein The inner wall of the cylinder port (12) is provided with a first annular boss (121); The cylinder bottom (31) is arranged on the first annular boss (121), and the gland (32) is threadedly connected with the cylinder port (12) to press the cylinder bottom (31).

10. The single air chamber energy accumulator of claim 9, wherein The side wall of the cylinder bottom (31) is provided with a second annular boss (311); The second annular boss (311) abuts against the first annular boss (121); The gland (32) is threadedly connected with the cylinder port (12) to press the second annular boss (311) of the cylinder bottom (31); An oil inlet (313) is formed in the cylinder bottom (31) and communicates with the oil cavity (112); An air inlet (312) is formed in the cylinder bottom (31) and communicates with the air cavity (114).

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