JP2004176879A - Accumulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accumulator capable of suppressing looseness due to secular deterioration or thermal contraction in a spacer 22 for adjusting volume built in an interior of a housing 2 in the accumulator, and by this, capable of preventing noise or breakage of a bellows 7 caused by the looseness. <P>SOLUTION: The metal bellows type accumulator has the housing 2 provided with a shell 3 and a gas end cover 4, the metal bellows 7 arranged in the interior of the housing 2, and the spacer 22 for adjusting volume fixed in an inner side of the gas end cover 4. An elastic body 23 for preventing looseness is provided between the gas end cover 4 and the spacer 22. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an accumulator used as a pressure accumulator or a pulse pressure attenuator. The accumulator of the present invention is used, for example, as an accumulator for an automobile.
[0002]
[Prior art]
As shown in FIG. 7, a spacer 53 is conventionally incorporated into the housing 51 of the accumulator to adjust the volume of the gas chamber 52. The spacer 53 is provided so as not to interfere with the bellows 54 which expands and contracts. A gap (not shown) is set between the bellows 54. Further, the outer diameter of the spacer 53 is set to the tolerance of fitting with the inner diameter of the gas end cover 55, and therefore, the spacer 53 is assembled so as not to rattle with respect to the gas end cover 55 at the beginning of assembly. I have.
[0003]
However, according to this conventional structure, when the spacer 53 formed in a disk shape by a predetermined resin material undergoes creep due to aging or thermal contraction due to a heat cycle, the spacer 53 has rattling with respect to the gas end cover 55. This may cause abnormal noise or damage the bellows 54.
[0004]
[Patent Document 1]
JP-A-2002-276604 (FIG. 8)
[0005]
[Problems to be solved by the invention]
In view of the above, the present invention can suppress generation of rattling due to aging deterioration and heat shrinkage in a volume adjusting spacer incorporated in the housing of an accumulator, and thereby cause abnormal noise due to the rattling. It is an object of the present invention to provide an accumulator that can prevent generation and breakage of a bellows.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an accumulator according to claim 1 of the present invention is an accumulator in which a spacer for volume adjustment is provided inside a housing, wherein an elastic body for preventing rattling is provided between the housing and the spacer. It is characterized by the following.
[0007]
An accumulator according to claim 2 of the present invention is a housing having a shell and a gas end cover, a metal bellows disposed inside the housing, and a volume adjusting spacer fixed inside the gas end cover. And an elastic body for preventing rattling is provided between the gas end cover and the spacer.
[0008]
An accumulator according to a third aspect of the present invention is the accumulator in which a spacer for adjusting the volume is provided inside the housing, wherein the spacer is formed of an elastic body and pressed into the housing.
[0009]
Furthermore, an accumulator according to a fourth aspect of the present invention includes a housing having a shell and a gas end cover, a metal bellows disposed inside the housing, and a volume adjustment fixed inside the gas end cover. In a metal bellows type accumulator having a spacer, the spacer is formed of an elastic body and press-fitted into the gas end cover.
[0010]
When an elastic body for preventing rattling is provided between the housing and the spacer as in the accumulator according to the first aspect of the present invention having the above configuration, the elastic body elastically holds the spacer by its elasticity. In addition, even if the spacer undergoes aging deterioration or thermal shrinkage, it is possible to prevent the spacer from rattling the housing. The elastic body is a rubber-like elastic body, and this rubber-like elastic body is interposed, for example, between the housing and the spacer. Further, the rubber-like elastic body may be formed integrally with the spacer.
[0011]
Further, when an elastic body for preventing rattling is provided between the gas end cover and the spacer in the metal bellows-type accumulator as in the accumulator according to the second aspect of the present invention having the above-described configuration, the elastic body becomes elastic by its elasticity. Since the spacer is elastically held, it is possible to prevent the spacer from rattling with respect to the gas end cover even if the spacer undergoes aging or thermal shrinkage. The elastic body is a rubber-like elastic body, and this rubber-like elastic body is interposed between, for example, a gas end cover and a spacer. Further, the rubber-like elastic body may be formed integrally with the spacer.
[0012]
Further, when the spacer is formed by an elastic body and press-fitted into the housing as in the accumulator according to the third aspect of the present invention, the spacer made of the elastic body is elastically inserted into the housing by its elasticity. Therefore, it is possible to suppress generation of rattling due to aging and heat shrinkage specific to the resin in the spacer. The elastic body is a rubber-like elastic body, and a spacer made of the rubber-like elastic body is press-fitted into the housing with a predetermined press-in allowance.
[0013]
Furthermore, in the metal bellows-type accumulator having the above-described structure, the spacer is formed by an elastic body and is press-fitted into the gas end cover. Since the gas end cover is elastically held by the gas end cover by elasticity, it is possible to suppress generation of rattling due to aging and heat shrinkage specific to the resin in the spacer. The elastic body is a rubber-like elastic body, and a spacer made of the rubber-like elastic body is pressed into the gas end cover with a predetermined press-in allowance.
[0014]
The present application includes the following technical matters.
[0015]
That is, to achieve the above object, one accumulator proposed by the present application has the following contents.
[0016]
{Circle around (1)} An elastic body such as an O-ring or a square ring is attached to the outer periphery of the spacer to prevent backlash in the radial direction and the length direction.
{Circle around (2)} An elastic body is installed on the outer periphery of the spacer by two-color molding to prevent backlash in the radial and length directions.
{Circle around (3)} The spacer for adjusting the volume in the gas chamber is made of a rubber material (elastic body) and pressed into the gas end cover to prevent rattling.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0018]
First embodiment ...
FIG. 1 shows a cross section of an accumulator 1 according to a first embodiment of the present invention, and an enlarged view of a main part thereof is shown in FIG.
[0019]
The accumulator 1 according to the embodiment is a metal bellows type accumulator, and is configured as follows.
[0020]
That is, first, the gas end cover 4 and the oil port (oil port member) 5 are fixed (welded) to both ends of the shell 3 having a substantially cylindrical shape, and the housing 2 is provided by these. An operating member 6 having a bellows 7 and a bellows cap 8 is housed therein. The gas end cover 4 may be formed integrally with the shell 3, and the oil port 5 may be formed integrally with the shell 3.
[0021]
The bellows 7 has one end (fixed end) fixed (welded) to the gas end cover 4 and the other end (movable end) fixed (welded) to the bellows cap 8. The inside of the housing 2 is divided into a gas chamber 9 inside the operation member 6 and a pressure chamber (liquid chamber) 10 outside the operation member 6 by an operation member 6 including a bellows cap 7 and a bellows cap 8. At the outer periphery of the other end of the bellows 7, a vibration damping ring 11 slidably contacting the inner surface of the shell 3 is attached so that the bellows 7 does not bite against the shell 3. As the bellows 7, a metal bellows made of an electrodeposited bellows, a molded bellows, a welding bellows, or the like is used, but a bellows of another material may be used depending on the specifications and applications of the accumulator 1. The bellows cap 8 may be formed integrally with the bellows 7. Further, one end of the bellows 7 is fixed to an inward flange 4a provided on the outer peripheral edge of the gas end cover 4, but instead of this flange 4a, an annular mounting member (not shown) is provided here. (Fixed), one end of the bellows 7 is fixed to this mounting member.
[0022]
A gas inlet 12 for injecting gas into the gas chamber 9 is provided in the gas end cover 4 constituting a part of the housing 2, and a gas plug 13 for closing the gas inlet 9 is provided in the gas inlet 9. Are attached and covered with a hexagon nut 14. Therefore, a predetermined pressure gas is injected into the gas chamber 9 from the injection port 12 before the gas plug 13 and the hexagon nut 14 are fixed, and the gas plug 13 and the hexagon nut 14 are fixed (welded together) after the injection. A gas at a pressure is sealed in the gas chamber 9. Nitrogen gas or the like is suitable as the type of gas to be filled.
[0023]
The oil port 5, which also forms a part of the housing 2, is provided with a tubular mounting portion 15 having a screw portion 16 for connecting the accumulator 1 to a pressure pipe or the like on a hydraulic system (not shown). The mounting portion 15 is provided with a pressure inlet (oil port in a narrow sense) 17 for introducing a pressure fluid on the pipe side into the pressure chamber 10. Therefore, the accumulator 1 is connected to the pipe side at the mounting portion 15, and the pressure on the pipe side is introduced from the pressure inlet 17 into the pressure chamber 10.
[0024]
On the inner surface of the oil port 5 and on the periphery of the opening of the pressure inlet 17, there is provided an annular mounting portion 18 having a concave shape with an annular step. A seal holder 19 is mounted on the portion, and a packing (seal) 20 as a seal member is mounted on a step portion on the outer peripheral side of the seal holder 19 and on the outer peripheral side of the mounting portion 18.
[0025]
The seal holder 19 is formed in a ring shape from a metal material such as a sheet metal, and is formed by integrally molding a cylindrical portion 19c on an outer peripheral edge of a disk-shaped flat portion 19a having a through hole 19b at the center of the flat surface. The half-section is formed in a substantially L-shape. The seal holder 19 is fixed to the mounting portion 18 by press-fitting, welding, bonding or other means. In this fixed state, an abnormal noise is generated inside the seal holder 19, that is, on the inner peripheral side of the cylindrical portion 19c. A chamber space 21 for prevention is formed.
[0026]
The packing 20 is formed in a ring shape by a predetermined rubber-like elastic material, and is formed as a lip seal integrally formed with an outward seal lip 20b at one end of a base 20a. The packing 20 is mounted on the mounting portion 18 in a non-adhesive manner by press-fitting or the like, and the tip of the cylindrical portion 19c of the seal holder 19 (the tip of the seal holder 19) is slanted outward in the radial direction ( It is prevented from falling off by being bent into a trumpet shape.
[0027]
When the bellows 7 expands due to a decrease in the pressure in the pressure chamber 10, the bellows cap 8 comes into contact with the packing 20 to perform a sealing action, so that the pressure in the pressure chamber 10 further decreases. The bellows 7 is provided in order to prevent the bellows 7 from expanding in the radial direction and galling on the shell 3.
[0028]
In the gas chamber 9 inside the housing 2, a spacer 22 for adjusting the volume of the gas chamber 9 is mounted inside the gas end cover 4.
[0029]
The spacer 22 is formed of a predetermined resin material such as a polyamide resin in a disk shape, and as shown in an enlarged view in FIG. 2, an annular mounting groove 22a provided on the outer peripheral surface thereof has an annular rubber formed of an O-ring. The rubber-like elastic body 23 is fitted, and is fixed to the inner periphery of the flange portion 4a of the gas end cover 4 by the fitting allowance of the rubber-like elastic body 23. When the mounting member is fixed to the inside of the outer peripheral edge of the gas end cover 4 having a substantially flat plate shape instead of the flange portion 4a as described above, the spacer 22 is attached to the inner periphery of the mounting member by the elastic body 23. Fixed.
[0030]
Between the outer peripheral surface and the inner peripheral surface of the flange portion 4a of the spacer 22 is set with a radial clearance c ₁ of a predetermined size, thus both 22,4c is a clearance fit. An annular concave portion 22b is formed on the lower surface of the spacer 22 and at the outer peripheral edge thereof, and a radial gap of a predetermined size is provided between the spacer 22 and the bellows 7 on the inner surface of the concave portion 22b. c ₂ and has axial gap c ₃ are set respectively, thus the spacer 22 is configured so as not to interfere with the bellows 7.
[0031]
The spacer 22 is provided with a hole-shaped communication passage 22 c for communicating the gas inlet 12 and the gas chamber 9 along the axial direction, and a spacer outer peripheral space sealed by the spacer 22 and the elastic body 23. A required number (one in the figure) of hole-shaped communication passages 22d for communicating the gas passage 9 with the gas chamber 9 is formed in the thickness of the spacer 22 along the radial direction and branched from the communication passage 22c. I have.
[0032]
The accumulator 1 having the above configuration is connected to the pressure pipe of the hydraulic system as described above, for example, and operates so as to absorb the pulsation of the pressure generated in the pressure pipe, and adjusts the volume of the gas chamber 9. Is attached to the gas end cover 4 via the elastic body 23 and is held by the elastic body 23, so that the spacer 22 made of resin material deteriorates over time or undergoes heat shrinkage. Even if this occurs, rattling of the spacer 22 with respect to the gas end cover 4 can be suppressed. Therefore, it is possible to prevent generation of abnormal noise and breakage of the bellows 7 due to the rattling.
[0033]
As shown in FIG. 2, the elastic body 23 is in close contact with the upper slope 4 b of the flange 4 a in a state of being fitted into the mounting groove 22 a provided on the outer peripheral surface of the spacer 22. The elastic body 23 is configured to engage with the flange portion 4a in the vertical direction in the drawing and to be hard to be displaced in the same direction. Therefore, also from this point, rattling of the spacer 22 can be prevented, and interference of the spacer 22 with the bellows 7 can be prevented.
[0034]
Second embodiment ...
In the first embodiment, an O-ring made of a rubber-like elastic material is used as the elastic body 23. Instead of the O-ring, a square ring made of a rubber-like elastic material is used as shown in FIG. The elastic body 23 may be used, and the cross-sectional shape of the elastic body 23 is not particularly limited.
[0035]
Third embodiment ...
In the first embodiment, the elastic body 23 is fitted into the mounting groove 22a provided on the outer peripheral surface of the spacer 22. However, the fitting may be integrally formed instead. . In the example of FIG. 4, a spacer 22 made of a resin material and an elastic body 23 made of a rubber-like elastic material are integrated by two-color molding.
[0036]
Fourth embodiment ...
FIG. 5 shows a cross section of an accumulator 1 according to a fourth embodiment of the present invention, and an enlarged view of a main part thereof is shown in FIG.
[0037]
The accumulator 1 according to the embodiment is a metal bellows type accumulator, and is configured as follows.
[0038]
That is, first, the gas end cover 4 and the oil port (oil port member) 5 are fixed (welded) to both ends of the shell 3 having a substantially cylindrical shape, and the housing 2 is provided by these. An operating member 6 having a bellows 7 and a bellows cap 8 is housed therein. The gas end cover 4 may be formed integrally with the shell 3, and the oil port 5 may be formed integrally with the shell 3.
[0039]
The bellows 7 has one end (fixed end) fixed (welded) to the gas end cover 4 and the other end (movable end) fixed (welded) to the bellows cap 8. The inside of the housing 2 is divided into a gas chamber 9 inside the operation member 6 and a pressure chamber (liquid chamber) 10 outside the operation member 6 by an operation member 6 including a bellows cap 7 and a bellows cap 8. At the outer periphery of the other end of the bellows 7, a vibration damping ring 11 slidably contacting the inner surface of the shell 3 is attached so that the bellows 7 does not bite against the shell 3. As the bellows 7, a metal bellows made of an electrodeposited bellows, a molded bellows, a welding bellows, or the like is used, but a bellows of another material may be used depending on the specifications and applications of the accumulator 1. The bellows cap 8 may be formed integrally with the bellows 7. Further, one end of the bellows 7 is fixed to an inward flange 4a provided on the outer peripheral edge of the gas end cover 4, but instead of this flange 4a, an annular mounting member (not shown) is provided here. (Fixed), one end of the bellows 7 is fixed to this mounting member.
[0040]
A gas inlet 12 for injecting gas into the gas chamber 9 is provided in the gas end cover 4 constituting a part of the housing 2, and a gas plug 13 for closing the gas inlet 9 is provided in the gas inlet 9. Are attached and covered with a hexagon nut 14. Therefore, a predetermined pressure gas is injected into the gas chamber 9 from the injection port 12 before the gas plug 13 and the hexagon nut 14 are fixed, and the gas plug 13 and the hexagon nut 14 are fixed (welded together) after the injection. A gas at a pressure is sealed in the gas chamber 9. Nitrogen gas or the like is suitable as the type of gas to be filled.
[0041]
The oil port 5, which also forms a part of the housing 2, is provided with a tubular mounting portion 15 having a screw portion 16 for connecting the accumulator 1 to a pressure pipe or the like on a hydraulic system (not shown). The mounting portion 15 is provided with a pressure inlet (oil port in a narrow sense) 17 for introducing a pressure fluid on the pipe side into the pressure chamber 10. Therefore, the accumulator 1 is connected to the pipe side at the mounting portion 15, and the pressure on the pipe side is introduced from the pressure inlet 17 into the pressure chamber 10.
[0042]
On the inner surface of the oil port 5 and on the periphery of the opening of the pressure inlet 17, there is provided an annular mounting portion 18 having a concave shape with an annular step. A seal holder 19 is mounted on the portion, and a packing (seal) 20 as a seal member is mounted on a step portion on the outer peripheral side of the seal holder 19 and on the outer peripheral side of the mounting portion 18.
[0043]
The seal holder 19 is formed in a ring shape from a metal material such as a sheet metal, and is formed by integrally molding a cylindrical portion 19c on an outer peripheral edge of a disk-shaped flat portion 19a having a through hole 19b at the center of the flat surface. The half-section is formed in a substantially L-shape. The seal holder 19 is fixed to the mounting portion 18 by press-fitting, welding, bonding or other means. In this fixed state, an abnormal noise is generated inside the seal holder 19, that is, on the inner peripheral side of the cylindrical portion 19c. A chamber space 21 for prevention is formed.
[0044]
The packing 20 is formed in a ring shape by a predetermined rubber-like elastic material, and is formed as a lip seal integrally formed with an outward seal lip 20b at one end of a base 20a. The packing 20 is mounted on the mounting portion 18 in a non-adhesive manner by press-fitting or the like, and the tip of the cylindrical portion 19c of the seal holder 19 (the tip of the seal holder 19) is slanted outward in the radial direction ( It is prevented from falling off by being bent into a trumpet shape.
[0045]
When the bellows 7 expands due to a decrease in the pressure in the pressure chamber 10, the bellows cap 8 comes into contact with the packing 20 to perform a sealing action, so that the pressure in the pressure chamber 10 further decreases. Therefore, the bellows 8 is provided to prevent the bellows 8 from expanding in the radial direction and galling on the shell 3.
[0046]
In the gas chamber 9 inside the housing 2, a spacer 22 for adjusting the volume of the gas chamber 9 is mounted inside the gas end cover 4.
[0047]
The spacer 22 is formed in a disk shape by a rubber-like elastic body having a predetermined elasticity, and has an outer diameter larger than an inner diameter of the flange portion 4a as shown in an enlarged manner in FIG. As a result, the gas end cover 4 is fixed to the inner periphery of the flange portion 4a by the fitting allowance (press fitting allowance). When a mounting member is fixed to the inside of the outer peripheral edge of the gas end cover 4 having a substantially flat plate shape instead of the flange portion 4a as described above, the spacer 22 is fixed to the inner periphery of the mounting member.
[0048]
The outer peripheral surface of the spacer 22 is in close contact with the flange 4a. On the other hand, an annular concave portion 22b is formed on the lower surface of the spacer 22 and at the outer peripheral edge thereof, and a predetermined size is provided between the spacer 22 and the bellows 7 on the inner surface of the concave portion 22b. radial clearance c ₂ and has axial gap c ₃ are set respectively, thus the spacer 22 is configured so as not to interfere with the bellows 7.
[0049]
Further, the spacer 22 is provided with a hole-shaped communication passage 22 c for communicating the gas inlet 12 and the gas chamber 9 along the axial direction, and a spacer outer space 24 sealed by the spacer 22 and a gas chamber 9 are formed on the upper surface of the spacer 22 along a required number (two in the figure) of radially extending branches from the communication passage 22c.
[0050]
The accumulator 1 having the above configuration is connected to the pressure pipe of the hydraulic system as described above, for example, and operates so as to absorb the pulsation of the pressure generated in the pressure pipe, and adjusts the volume of the gas chamber 9. Since the spacer 22 provided for this purpose is formed of a rubber-like elastic body and is elastically held by the gas end cover 4, it is possible to prevent the spacer 22 from generating aging due to resin-specific deterioration and rattling due to heat shrinkage. Can be suppressed. Therefore, it is possible to prevent generation of abnormal noise and breakage of the bellows 7 due to the rattling.
[0051]
Also, as shown in FIG. 6, the spacer 22 made of a rubber-like elastic body is in close contact with the upper slope 4b of the flange 4a, so that the spacer 22 engages the flange 4a in the vertical direction in the figure. And it is a structure which is hard to be displaced in the same direction. Therefore, also from this point, rattling of the spacer 22 can be prevented, and interference of the spacer 22 with the bellows 7 can be prevented.
[0052]
【The invention's effect】
The present invention has the following effects.
[0053]
That is, in the accumulator according to the first aspect of the present invention having the above configuration, since the elastic body for preventing rattling is provided between the housing and the spacer, the elastic body elastically moves the spacer. It is configured to be held. Therefore, even if the spacer deteriorates over time or undergoes thermal shrinkage, it is possible to prevent the spacer from rattling against the housing, thereby preventing abnormal noise and bellows from being damaged due to the rattling. can do. Therefore, an accumulator excellent in quietness and durability can be provided.
[0054]
Further, in the accumulator according to the second aspect of the present invention having the above configuration, since the elastic body for preventing rattling is provided between the gas end cover and the spacer in the metal bellows type accumulator, this elastic body is The spacer is elastically held by the elasticity. Therefore, even if the spacer deteriorates over time or undergoes thermal shrinkage, it is possible to prevent the spacer from rattling against the gas end cover, and this rattling causes abnormal noise or damage to the bellows. Can be prevented. Therefore, an accumulator excellent in quietness and durability can be provided.
[0055]
Further, in the accumulator according to the third aspect of the present invention having the above configuration, since the spacer is formed by an elastic body and pressed into the housing, the elastic spacer is elastically held in the housing by its elasticity. It is configured to be. Therefore, generation of rattling due to aging deterioration and heat shrinkage of the spacer can be suppressed, and generation of abnormal noise and damage to the bellows due to the rattling can be prevented. Therefore, an accumulator excellent in quietness and durability can be provided.
[0056]
Furthermore, in the accumulator according to the fourth aspect of the present invention having the above configuration, since the spacer is formed by an elastic body in the metal bellows type accumulator and is press-fitted into the gas end cover, the spacer made of the elastic body has the elasticity. Thus, the gas end cover is elastically held by itself. Therefore, generation of rattling due to aging deterioration and heat shrinkage of the spacer can be suppressed, and generation of abnormal noise and damage to the bellows due to the rattling can be prevented. Therefore, an accumulator excellent in quietness and durability can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an accumulator according to a first embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of main parts of the accumulator. FIG. 3 is a cross-sectional view of main parts of an accumulator according to a second embodiment of the present invention. 4 is a cross-sectional view of an accumulator according to a third embodiment of the present invention. FIG. 5 is a cross-sectional view of an accumulator according to a fourth embodiment of the present invention. FIG. 6 is an enlarged cross-sectional view of a main part of the accumulator. Sectional view of accumulator according to conventional example [Description of reference numerals]
DESCRIPTION OF SYMBOLS 1 Accumulator 2 Housing 3 Shell 4 Gas end cover 4a Flange part 4b Top slope part 5 Oil port 6 Operating member 7 Bellows 8 Bellows cap 9 Gas chamber 10 Pressure chamber 11 Vibration suppression ring 12 Gas inlet 13 Gas plug 14 Hex nut 15 Mounting Part 16 screw part 17 pressure inlet 18 mounting part 19 seal holder 20 packing 21 chamber space 22 spacer 22a mounting groove 22b recessed parts 22c, 22d, 22e communication passage 23 elastic body 24 outer peripheral space

Claims (4)

In an accumulator (1) provided with a spacer (22) for volume adjustment inside a housing (2),
An accumulator characterized in that an elastic body (23) for preventing rattling is provided between the housing (2) and the spacer (22). A housing (2) having a shell (3) and a gas end cover (4), a metal bellows (7) arranged inside the housing (2), and fixed inside the gas end cover (4); A metal bellows-type accumulator (1) having a spacer (22) for adjusting the volume,
An accumulator characterized in that an elastic body (23) for preventing rattling is provided between the gas end cover (4) and the spacer (22). In an accumulator (1) provided with a spacer (22) for volume adjustment inside a housing (2),
An accumulator characterized in that the spacer (22) is formed of an elastic body and pressed into the housing (1). A housing (2) having a shell (3) and a gas end cover (4), a metal bellows (7) arranged inside the housing (2), and fixed inside the gas end cover (4); A metal bellows-type accumulator (1) having a spacer (22) for adjusting the volume,
The accumulator, wherein the spacer (22) is formed of an elastic body and press-fitted into the gas end cover (4).

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