JP2011174580A - Connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector for a new piping, which can reduce fluid pulsation for fluid transportation. <P>SOLUTION: The connector includes a housing 10 which is formed in a cylindrical shape and forms a flow passage in which a first fluid circulates in its inner circumferential surface, and a pulsation absorbing member 40 which has flow passage wall surfaces 41a, 42a forming part of the flow passage, moves the flow passage wall surfaces 41a, 42a so as to enlarge the cross section in the direction orthogonal to the fluid circulation of the flow passage formed by the flow passage wall surfaces 41a, 42a when the pressure of the first fluid circulating in the flow passage increases, and moves the flow passage wall surfaces 41a, 42a so as to reduce the cross section in the direction orthogonal to the fluid circulation of the flow passage formed by the flow passage wall surfaces 41a, 42a when the pressure of the first fluid circulating in the flow passage decreases. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a connector for piping, and more particularly to a connector capable of reducing fluid pulsation during fluid transportation.

  For example, as a connector of a pipe applied to a fuel supply system of an automobile, there is one that connects a hose that distributes fuel pumped from a pump and a fuel delivery pipe that distributes and supplies the fuel to a plurality of injectors. In such a pipe, the fuel is transported by pressurizing the fuel in the hose with a pump so as to have a set constant pressure. In this state, it is known that when an injector such as an injector is opened and closed to control fuel supply, the pressure in the piping fluctuates and the fuel pulsates. When the fuel pulsates, the pressure of the fuel in the injection device becomes excessive or insufficient, and the amount of fuel injected by the injection device may cause an error with respect to a desired amount.

  Therefore, Patent Document 1 describes a technique for reducing pulsation by a damping pipe that can be elastically deformed in the pipe. Japanese Patent Application Laid-Open No. H10-228667 describes a technique for attenuating pulsation with a pulsation damper. Patent Document 3 describes an elbow type connector in which a bellows is disposed in an elbow portion, which is a portion through which fluid does not pass, and pulsation is absorbed by deformation of the bellows. Further, Patent Document 4 describes a pipe in which a damper member that increases or decreases the volume of a hollow body is arranged at a corner where fluid does not pass.

JP 2000-240530 A JP 2007-182800 A JP 2004-183812 A JP 2003-83199 A

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a new piping connector capable of reducing fluid pulsation during fluid transportation.

(Basic configuration of the connector of the present invention)
The connector according to the present invention is
A housing formed in a cylindrical shape and forming a flow path through which the first fluid flows on the inner peripheral surface;
A flow passage wall surface forming a part of the flow passage, and when the pressure of the first fluid flowing through the flow passage increases, a cross-sectional area of the flow passage perpendicular to the flow passage formed by the flow passage wall surface is The flow passage wall surface is moved so as to expand, and when the pressure of the first fluid decreases, the flow passage wall surface is reduced so that the cross-sectional area of the flow passage formed in the flow passage orthogonal direction of the flow passage is reduced. A pulsation absorbing member to be moved;
Is provided.

  According to the present invention, when the pressure of the first fluid flowing through the flow path changes, the cross-sectional area of the flow path in the direction perpendicular to the fluid flow is changed according to the pressure. Here, the cross-sectional area in the flow orthogonal direction of the flow path means an area on a plane orthogonal to the direction in which the first fluid flows in the flow path. For example, the case where the first fluid is stable at a predetermined pressure will be described as an initial state. When the pressure of the first fluid is lower than the predetermined pressure in the initial state, the cross-sectional area in the fluid flow orthogonal direction of the flow path formed by the flow path wall surface of the pulsation absorbing member is reduced. As a result, the flow velocity of the first fluid flowing through the flow path formed by the flow path wall surface of the pulsation absorbing member is increased. Accordingly, a force is generated in a direction in which the pressure of the first fluid increases toward the predetermined pressure. That is, when the first fluid becomes lower than the predetermined pressure, it acts so as to return to the initial state at an early stage thereafter. Thereafter, when the pressure of the first fluid becomes higher than the predetermined pressure, the cross-sectional area in the direction perpendicular to the fluid flow of the channel formed by the channel wall surface of the pulsation absorbing member increases. As a result, the flow velocity of the first fluid flowing through the flow path formed by the flow path wall surface of the pulsation absorbing member is reduced. Accordingly, a force is generated in a direction in which the pressure of the first fluid is lowered. Therefore, when the pressure of the first fluid becomes higher than the predetermined pressure, it acts so as to return to the initial state at an early stage thereafter. Thus, the pressure change of the first fluid flowing through the flow path, that is, the pulsation can be absorbed.

(Configuration in which the pulsation absorbing member elastically deforms the metal plate)
Further, another connector according to the present invention is:
A housing formed in a cylindrical shape and forming a flow path through which the first fluid flows on the inner peripheral surface;
It is disposed in the flow path, is formed in a hollow shape by a metal member that can be elastically deformed, the second fluid is sealed inside the hollow, and has a flow path wall surface that forms a part of the flow path, and flows through the flow path When the pressure of the first fluid increases, the flow path wall surface is elastically deformed so as to expand the cross-sectional area of the flow path formed by the flow path wall surface in the direction perpendicular to the fluid flow, and the pressure of the first fluid is increased. A pulsation absorbing member that elastically deforms the flow path wall so as to reduce the cross-sectional area of the flow path perpendicular to the flow direction formed by the flow path wall when lowered,
Is provided.

  Here, the connector which concerns on this invention is comprised including all the basic structures of the connector which concerns on this invention mentioned above. And according to the said invention, the flow-path wall surface which forms a part of flow path in a pulsation absorption member elastically deforms a pulsation absorption member in connection with the pressure of the 1st fluid of a flow path changing. The pulsation absorbing member is formed of a metal member. Therefore, even when the pulsation absorbing member is repeatedly elastically deformed, high durability can be obtained. For example, iron, aluminum, magnesium or the like can be applied as a material for the pulsation absorbing member. In particular, when a steel material is used, it is inexpensive and can be easily formed into a desired shape.

(First aspect of the configuration in which the pulsation absorbing member is elastically deformed of the metal plate)
In the present invention, the pulsation absorbing member is formed in a surrounding shape that surrounds all radial outer directions, and an outer peripheral surface of the pulsation absorbing member that faces the inner peripheral surface of the housing is the flow as a part of the flow path. When the pressure of the first fluid flowing through the flow path is increased, the flow path wall surface is expanded so that the cross-sectional area in the direction perpendicular to the fluid flow of the flow path formed by the flow path wall surface is increased. The flow passage wall surface is elastically deformed in a direction toward the central axis of the housing, and the cross-sectional area of the flow passage formed in the flow passage orthogonal direction is reduced when the pressure of the first fluid decreases. May be elastically deformed in a direction toward the inner peripheral surface of the housing.

  According to the present invention, in the portion where the pulsation absorbing member is disposed, the region where the first fluid flows is between the outer peripheral surface of the pulsation absorbing member and the inner peripheral surface of the housing. By making the pulsation absorbing member into the surrounding shape as described above, the cross-sectional area in the flow orthogonal direction of the flow path can be sufficiently ensured in the portion where the pulsation absorbing member is disposed. And if the cross-sectional area of the flow path in the direction perpendicular to the fluid flow changes suddenly, there is a risk that smooth flow of the fluid may be hindered. Then, it can suppress that the smooth distribution | circulation of a 1st fluid is prevented by making a pulsation absorption member into a surrounding shape like this invention.

  Further, in the present invention, the pulsation absorbing member is formed by a pair of metal plate materials having the same shape, and each of the metal plate materials has a saddle portion formed in a saddle shape, and all of the saddle shape portions. A flange portion projecting outward at a peripheral portion, and the pulsation absorbing member is formed by overlapping and joining the flange portions of the respective metal plate members, and a part of the saddle portion is The pulsation absorbing member may be disposed in the flow path so as to form the flow path wall surface.

  According to this invention, the flange part over the perimeter is not arrange | positioned so as to oppose with respect to the 1st fluid which distribute | circulates a flow path. That is, the flange portion can be prevented from obstructing the flow of the first fluid. Further, the pulsation absorbing member can be easily formed by forming the flange portion by each metal plate material. As means for joining the flange portions of the respective metal plate materials, welding, crimping, fastening with a bolt or the like, caulking with the other flange portion, or the like can be applied.

  Moreover, in this invention, the length of the longitudinal direction of the said flange part is formed longer than the internal diameter of the internal peripheral surface in the site | part which arrange | positions the said pulsation absorption member among the said housings, and is orthogonal to the said longitudinal direction of the said flange part. The direction may be shorter than the inner diameter of the inner peripheral surface of the housing where the pulsation absorbing member is disposed.

  The longitudinal direction of the flange portion means a direction connecting the largest portions of the outer edge distance of the ring-shaped flange portion. And the longitudinal direction of a flange part is formed longer than the internal diameter of the internal peripheral surface in the site | part which arrange | positions a pulsation absorption member among housings. Thereby, it can be ensured that the flange portion over the entire circumference is not arranged so as to face the first fluid flowing through the flow path. That is, even if the flange portion is formed, it is possible to reliably prevent the flange portion from obstructing the flow of the first fluid.

(Second aspect of the configuration in which the pulsation absorbing member is elastically deformed of the metal plate)
Further, in the connector according to the present invention, the pulsation absorbing member is formed in a cylindrical shape and is disposed so as to penetrate in the flow direction of the first fluid in the flow path. The circumferential surface forms the flow channel wall surface as a part of the flow channel, and when the pressure of the first fluid flowing through the flow channel increases, the flow channel orthogonal direction of the flow channel formed by the flow channel wall surface Fluid flow in the flow path formed by the flow path wall surface when the flow path wall surface is elastically deformed in a direction toward the inner peripheral surface of the housing so as to increase a cross-sectional area of the housing The flow passage wall surface may be elastically deformed in a direction toward the central axis of the housing so as to reduce the cross-sectional area in the orthogonal direction.

  According to the present invention, in the portion where the pulsation absorbing member is disposed, the through hole formed by the inner peripheral surface of the pulsation absorbing member is a region through which the first fluid flows. By making the pulsation absorbing member cylindrical as described above, the first fluid can be circulated in the vicinity of the central axis of the housing where the flow velocity is maximized. Thereby, a rapid change in the flow rate of the fluid can be suppressed.

  Further, in the present invention, the pulsation absorbing member forms a circumferential groove on the outer circumferential side, covers a circumferential groove member formed with an inner circumferential surface as the flow channel wall surface, and an outer circumferential side of the circumferential groove member, And a cover member joined to the outer peripheral edge of the circumferential groove member.

  That is, the flow path wall surface that is elastically deformed in accordance with a change in the pressure of the fluid is the inner circumferential surface of the circumferential groove member. The circumferential groove member has side walls on both sides in the axial direction of the inner circumferential surface as the flow path wall surface. Therefore, the channel wall surface that is elastically deformed can be reliably supported. That is, the durability of the circumferential groove member can be sufficiently obtained by making the inner circumferential surface of the circumferential groove member a flow path wall surface that is elastically deformed.

(Third aspect of the configuration in which the pulsation absorbing member is elastically deformed of the metal plate)
The connector which concerns on this invention WHEREIN: The outer peripheral surface which opposes the inner peripheral surface of the said housing among the said pulsation absorption members forms the said 2nd flow-path wall surface as a part of said flow path, and distribute | circulates the said flow path. When the pressure of the first fluid is increased, the second channel wall surface is used as the central axis of the housing so as to enlarge the cross-sectional area of the channel formed by the second channel wall surface in the direction perpendicular to the fluid flow direction. When the pressure of the first fluid is lowered, the second flow path wall surface is formed so as to reduce the cross-sectional area in the fluid flow orthogonal direction of the flow path formed by the second flow path wall surface. May be elastically deformed in a direction toward the inner peripheral surface of the housing.
According to the present invention, in addition to the inner peripheral surface of the cylindrical pulsation absorbing member, the pulsation reducing effect is exerted on the outer peripheral surface by elastic deformation. Therefore, pulsation can be more reliably suppressed.

(Common to the first to third aspects of the elastic deformation of the metal plate)
In the above invention, the pulsation absorbing member may be arranged in a floating state in the flow path. That is, the pulsation absorbing member can exert the above-described effect without any positioning in the flow path. And at the time of an assembly | attachment, it becomes very easy to accommodate a pulsation absorption member in the inside of a housing. Therefore, the manufacturing cost can be suppressed.

  Moreover, in this invention, it is good for the said flow-path wall surface of the said pulsation absorption member to be formed so that it may have a site | part with the same diameter in the distribution direction of the said fluid. Thereby, the site | part which becomes the same diameter among the flow-path wall surfaces of a pulsation absorption member can be made into a site | part which deform | transforms easily compared with another site | part. Therefore, the pulsation absorbing effect can be reliably exhibited by the pulsation absorbing member.

  Moreover, in this invention, it is good for the said flow-path wall surface of the said pulsation absorption member to be formed so that it may have a planar part. Thereby, a planar site | part can be made into a site | part which deform | transforms easily compared with another site | part among the flow-path wall surfaces of a pulsation absorption member. Therefore, the pulsation absorbing effect can be reliably exhibited by the pulsation absorbing member.

  In the present invention, the second fluid may be air. Thereby, it can form easily. Cost reduction can be achieved.

(Configuration in which movement of pulsation absorbing member uses magnetic force of magnet)
Further, another connector according to the present invention is:
A housing formed in a cylindrical shape and forming a flow path through which the first fluid flows on the inner peripheral surface;
Opposed to be formed by a pair of opposed members, arranged in the flow path, forming a flow path wall surface that is a part of the flow path by surfaces facing each other, and forming the flow path wall surface in the flow path A pair of pulsation absorbing members provided so as to be movable so as to be spaced apart and approach each other;
A pair of first magnets arranged so as to have the same magnetic poles on the opposing surfaces of the pair of pulsation absorbing members, and separating the opposing surfaces of the pair of pulsation absorbing members by mutual repulsive forces;
A pair of second pulsation absorbing members that are arranged on the opposing surfaces of the pair of pulsation absorbing members and the housing so as to have the same magnetic pole, and exert a force in a direction in which the pair of pulsation absorbing members are brought close to each other by mutual repulsive forces A magnet,
With
When the pressure of the first fluid flowing through the flow path increases, the cross-sectional area in the direction perpendicular to the fluid flow of the flow path formed by the flow wall surface against the repulsive force between the pair of second magnets is enlarged. The pulsation absorbing member is moved so that, when the pressure of the first fluid is reduced, the pulsation absorbing member is moved so as to reduce the cross-sectional area of the flow path formed by the flow path wall surface in the direction perpendicular to the fluid flow. Let

  Here, the connector which concerns on this invention is comprised including all the basic structures of the connector which concerns on this invention mentioned above. According to the present invention, the pulsation absorbing member is positioned in the flow path by the action of the pair of first magnets and the pair of second magnets. Then, when the pressure of the first fluid is increased with reference to the positioned state, the pair of pulsation absorbing members are moved away from each other by the pressure of the first fluid, and the cross-sectional area of the flow path in the direction perpendicular to the fluid flow is determined. Expanding. Thus, with the configuration using the magnet, positioning can be performed reliably, and a desired operation corresponding to the pressure of the first fluid can be realized. Therefore, pulsation can be reliably suppressed.

  In the present invention, the housing includes a pair of guide members extending in a direction orthogonal to the flow direction of the first fluid in the flow path on both sides opposed to the cylindrical central axis, and each of the pulsation absorbing members. May be configured to be movable in such a manner that the opposing surfaces forming the flow channel wall surface are separated from and approach each other by being regulated by the respective guide members.

  According to the present invention, the pair of pulsation absorbing members can be reliably moved in the direction orthogonal to the flow direction of the first fluid by the pair of guide members. Therefore, when the pressure of the first fluid changes, the opposed surfaces of the pair of pulsation absorbing members can be reliably operated so as to be separated from and approach each other.

  In the present invention, the opposing surfaces of the pair of pulsation absorbing members may be formed so as to be thinner toward the tip side. That is, the opposing space of the opposing surfaces of the pair of pulsation absorbing members is an area where the first fluid flows. By forming the facing surface so as to be thinner toward the tip side, it is possible to suppress a sudden change in the cross-sectional area of the flow path in the direction perpendicular to the fluid flow. Therefore, smooth distribution of the first fluid can be ensured. Further, when the pressure of the first fluid becomes low, the pair of pulsation absorbing members move in a direction in which they approach. At this time, when the pressure suddenly changes, there is a possibility that the flow path may be blocked by instantaneous contact between the opposing surfaces. However, even in such a case, by making the facing surface thinner toward the tip side, it is possible to narrow the range of blocking the flow path, and to minimize the influence of blocking the flow path.

  Also, in the present invention, each of the pulsation absorbing members covers a third magnet having one magnetic pole on the opposing surface and the other magnetic pole on the side facing the inner peripheral surface of the housing, and the third magnet. The third magnet may correspond to a pair of the first magnets and a magnet provided on the pulsation absorbing member of the pair of second magnets.

  According to the present invention, the third magnet mounted on the pulsation absorbing member is an integral magnet. Thereby, shaping | molding of a magnet becomes easy. Furthermore, the pulsation absorbing member is formed by covering the third magnet with the covering member. Thereby, formation of a pulsation absorption member becomes very easy.

  In the present invention, the first fluid can flow between the pulsation absorbing member and the housing, and there is a gap smaller than an opposing space formed by opposing surfaces of the pair of pulsation absorbing members. It may be formed. Thereby, it becomes very easy to install the pulsation absorbing member in the housing. Moreover, the clearance gap between a pulsation absorption member and a housing is formed smaller than the opposing space of the mutual opposing surface of a pair of pulsation absorption members. If the fluid pressure fluctuations act on the radially inner side and the radially outer side of the first and second pulsation absorbing members 540 and 550, the first and second pulsation absorbing members 540 and 550 do not move. However, according to the present invention, when the pressure of the first fluid increases, the opposed surfaces of the pair of pulsation absorbing members can be reliably moved in a direction away from each other. Therefore, the effect of reducing pulsation is surely exhibited while facilitating assembly.

1 is a conceptual diagram of a fuel supply system. 1 is a front view of a connector 1. FIG. FIG. 3 is a cross-sectional view through the axis of the connector 1 as viewed from the same direction as FIG. (A) is the elements on larger scale of the small diameter part 11 of the housing 10 in an initial state. (B) is AA sectional drawing of (a). It is a figure which shows the pulsation absorption member. (A)-(d) is the front view of the pulsation absorption member 40, a bottom view, a right view, and BB sectional drawing in order. It is the elements on larger scale of the small diameter part 11 when it changes so that the pressure of fluid fuel may become high with respect to an initial state. 2nd embodiment: It is a figure which shows the pulsation absorption member 240. FIG. (A)-(d) is the front view of the pulsation absorption member 240, a bottom view, a right view, and CC sectional drawing in order. 3rd embodiment: (a) is the partial expanded sectional view of the axial direction of the connector 300. FIG. (B) is DD sectional drawing of (a). 4th embodiment: (a) is the partial expanded sectional view of the axial direction of the connector 400. FIG. (B) is EE sectional drawing of (a). Fifth Embodiment: (a) is a partially enlarged sectional view in the axial direction of the connector 500 in an initial state. (B) is FF sectional drawing of (a). Fifth embodiment: (a) is a partially enlarged cross-sectional view of the connector 500 in the axial direction when the pressure of the fluid fuel is changed with respect to the initial state. (B) is GG sectional drawing of (a).

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments in which a connector of the present invention is embodied will be described with reference to the drawings.
<First embodiment>
(Description of application location of connector 1)
As shown in FIG. 1, the connector 1 of the present embodiment distributes fluid fuel (corresponding to “first fluid” in the present invention) pumped from a fuel tank 2 by a pump 3 in a fuel supply system of an automobile. A quick connector that connects the hose 4 and the fuel delivery pipe 5 that distributes and supplies the supplied fluid fuel to the injector 6 will be described. Further, a desired amount of fluid fuel is injected into the engine cylinder 7 by controlling the open / close state of the injector 6 which is a flow path opening / closing device. The pipe 8 is a cylindrical member made of metal or resin, and is provided on the base end side of the fuel delivery pipe 5. 2 and 3, the hose 4 and the fuel delivery pipe 5 are connected by connecting the tip of the hose 4 to one end of the connector 1 and connecting the pipe 8 to the other end of the connector 1. Is done. Further, the pipe 8 is formed with an annular convex portion 8a (shown in FIG. 3) provided so as to protrude in the centrifugal direction at a position separated from the distal end surface on the side inserted into the connector 1 by a predetermined distance. . Hereinafter, a portion of the pipe 8 from the tip surface to the annular convex portion 8a is referred to as a tip portion of the pipe 8.

  Here, in FIG. 3 which shows the axial cross section of the connector 1, the fluid fuel is connected to the pump 3 via the hose 4 in the axial direction of the connector 1 (left side in FIG. 3) from the axial direction of the connector 1. In FIG. 3, the fuel flows through the fuel delivery pipe 5 toward the side connected to the engine cylinder 7 (the side to which the pipe 8 is connected, the right side in FIG. 3). Therefore, in the following description, the side of connector 1 to which hose 4 is connected (left side in FIG. 3) is referred to as the upstream side, and the side of connector 1 in which pipe 8 is inserted (right side in FIG. 3) is the downstream side. Called.

(Description of configuration of connector 1)
The connector 1 mainly includes a housing 10, a hose connection portion 20, a locking member 30, and a pulsation absorbing member 40. The housing 10 is made of resin (for example, PA (polyamide)) and is formed in a cylindrical shape as shown in FIGS. 2 and 3. Specifically, the housing 10 has a small diameter portion 11, a medium diameter portion 12 and a large diameter portion 13 which are coaxially provided in order from the upstream side in the axial direction (the left side in FIGS. 2 and 3). A flow path through which fluid fuel flows is formed on the surface. The housing 10 is connected to the pipe 8 via a locking member 30 inserted and held in the large-diameter portion 13 on the downstream side.

  The inner diameter of the small diameter portion 11 is formed to be approximately the same as the outer diameter of the tip portion of the pipe 8 inserted into the housing 10. And an annular fitting inner peripheral surface is formed so that a part of inner peripheral surface of the small diameter part 11 may be fitted with the outer peripheral surface of the front-end | tip part of this pipe 8. FIG. Further, the small diameter portion 11 forms an accommodation space 11 a for accommodating a pulsation absorbing member 40 described later between the axial direction between the downstream end surface of the hose connection portion 20 and the tip end surface of the pipe 8.

  The inner diameter portion 12 has an inner diameter larger than the inner diameter of the small diameter portion 11, and the tip end portion of the pipe 8 is inserted. Accordingly, a radial gap is formed between the inner peripheral surface of the medium diameter portion 12 and the outer peripheral surface of the tip portion of the pipe 8. A seal member is disposed in the radial gap of the medium diameter portion 12. The seal member includes a pair of O-rings 61 that seal the inner peripheral surface of the housing 10 and the outer peripheral surface of the distal end portion of the pipe 8, a cylindrical collar member 62 between the pair of O-rings 61 in the axial direction, and the most downstream. And a cylindrical bush 63 that covers the radial gap in the axial direction. A seal member seals the pipe 8 between the pipe 8 and the housing 10 on the outer peripheral surface of the tip portion of the pipe 8 (the tip side portion relative to the annular convex portion 8a).

  The large-diameter portion 13 includes a pair of flat wall portions 13a and 13a extending in parallel to each other in the axial direction of the housing 10 on the outer peripheral surface, one circumferential end surface of each flat wall portion 13a and 13a, and the other circumferential end surface. It consists of a pair of circular arc wall parts 13b and 13b which connect each other integrally. In addition, window portions 13c and 13c that penetrate in the radial direction of the housing 10 and are opposed to each other are provided in the center portions in the circumferential direction of the circular arc wall portions 13b and 13b, respectively. A locking claw portion 31 of a locking member 30 to be described later is locked to an end portion of the window portion 13c on the downstream side in the axial direction of the housing 10 (right side in FIG. 3). As a result, the locking member 30 is prevented from coming off from the housing 10.

  The hose connection portion 20 is made of resin (for example, PA (polyamide)) and is integrally formed with the small-diameter portion 11 on the upstream side of the housing 10. The hose connection portion 20 has a shaft hole 21 penetrating through the inner peripheral surface, and a plurality of annular sharp protrusions 22 are formed in the axial direction on the outer peripheral surface. The hose 4 is externally fitted to the outer peripheral surface of the hose connection portion 20 by press fitting, and the annular sharp protrusion 22 restricts the hose 4 from coming off. Further, an O-ring (not shown) is appropriately inserted between adjacent annular sharp protrusions 22 and is sealed between the hose 4 and the hose connection portion 20.

  The locking member 30 is made of an elastically deformable resin (for example, PA (polyamide)), and is inserted and held in the hollow portion of the large-diameter portion 13 of the housing 10. The locking member 30 is formed in a C-shaped radial cross-sectional shape, and a relatively large deformation gap is provided between both ends of the C-shaped circumferential direction. On the outer peripheral surface of the locking member 30, a pair of locking claws 31 protruding outward in the radial direction are formed. The locking claw portion 31 is locked toward the downstream side in the axial direction with respect to the axial end portion of the window portion 13 c of the housing 10, and restricts the locking member 30 from coming off from the housing 10.

  The inner peripheral surface of the locking member 30 is located from the large-diameter portion 13 to the medium-diameter portion 12 of the housing 10 in a state where the locking member 30 is inserted and held in the hollow portion of the housing 10, that is, from the downstream side to the upstream side. It forms so that it may incline in radial direction as it goes to. In addition, a slit 32 into which the annular convex portion 8 a enters when the pipe 8 and the housing 10 are connected is formed on the upstream side of the locking member 30 so as to be opposed thereto. The downstream end of the slit 32 is engaged with the annular protrusion 8a of the pipe 8 on the downstream side in the axial direction in a state where the pipe 8 and the housing 10 are connected to the housing 10. The removal of the pipe 8 is regulated. Further, a pair of operation arms 33 is provided at the downstream end of the locking member 30, and the locking member 30 can be reduced in diameter by applying a force so as to be sandwiched between the operation arms 33. It has become.

  The pulsation absorbing member 40 is accommodated in the accommodating space 11 a of the small diameter portion 11 of the housing 10 as shown in FIGS. 3, 4 (a) and 4 (b). Specifically, the pulsation absorbing member 40 is arranged in a floating state in the accommodation space 11a. The pulsation absorbing member 40 is formed in a hollow shape by an elastically deformable metal member, and air (corresponding to the “second fluid” of the present invention) is sealed inside the hollow. Here, the pulsation absorbing member 40 is formed in a surrounding shape that surrounds all radial outer directions. And the outer peripheral surface of the pulsation absorption member 40 forms the flow-path wall surface as a part of flow path through which fluid fuel distribute | circulates. That is, the flow path through which the fluid fuel flows is a cylindrical flow path formed by the outer peripheral surface of the pulsation absorbing member 40 and the inner peripheral surface of the small-diameter portion 11 of the housing 10 at the portion where the pulsation absorbing member 40 is disposed. It becomes.

  According to the pressure of the fluid flowing through the flow path, the outer peripheral surface of the pulsation absorbing member 40 is elastically deformed radially inward or radially outward, and the fluid flow orthogonal to the flow path formed by the outer peripheral surface of the pulsation absorbing member 40 Change the cross-sectional area of the direction. As a result, the pulsation of the fluid fuel can be reduced.

(Detailed description of the pulsation absorbing member 40)
The pulsation absorbing member 40 includes a first metal member 41 and a second metal member 42. Each member 41 and 42 which comprises the pulsation absorption member 40 is demonstrated in detail with reference to FIG.
As shown in FIG. 5, the first metal member 41 is formed by press-molding a steel plate (corresponding to the “metal plate material” of the present invention), thereby forming the saddle portion 41 a and the entire periphery on the opening side of the saddle portion 41 a. And a ring-shaped flange portion 41b formed to project outward at the portion. As shown in FIG. 5A, the opening edge of the bowl portion 41a is formed in an oval shape having a parallel line in the middle. That is, the opening edge of the bowl-shaped part 41a is formed to be long in the direction of the parallel line. The length of the vertical portion 41 a in the longitudinal direction is set larger than the inner diameter of the small diameter portion 11 of the housing 10. This is because the pulsation absorbing member 40 can be stably accommodated in the accommodating space 11 a of the small diameter portion 11.

  That is, in a state where the pulsation absorbing member 40 is disposed in the accommodating space 11a of the small diameter portion 11, the outer peripheral surface of the first metal member 41 of the pulsation absorbing member 40 is a solid line in FIG. This is the part shown. The shape of the solid line portion of the saddle-shaped portion 41a in FIG. 5C is formed in an arc shape so that stress is not concentrated.

  The flange portion 41b is formed with the same width over the entire circumference. Therefore, the outer edge shape of the flange portion 41b is an oval shape that is slightly larger than the opening edge shape of the hook portion 41a. The width in the short direction of the flange portion 41 b is set smaller than the inner diameter of the small diameter portion 11 of the housing 10. On the other hand, of course, the longitudinal width of the flange portion 41 b is set smaller than the inner diameter of the small diameter portion 11 of the housing 10.

  The second metal member 42 has the same shape as the first metal member 41. In other words, the second metal member 42 includes a saddle portion 42a and a ring-shaped flange portion 42b formed so as to expand outward on the entire opening side periphery of the saddle portion 42a by press forming a steel plate. .

  And the opening side of the hook part 41a of the first metal member 41 and the opening side of the hook part 42a of the second metal member 42 face each other so that the flange part 41b of the first metal member 41 and the second metal member 42 The flange portion 42b is overlapped and joined. Therefore, both hook-shaped parts 41a and 42a are united, and it has the surrounding shape where the radial outer direction is enclosed. And the hollow part 43 is formed. Here, joining of the flange parts 41b and 42b of the 1st, 2nd metal members 41 and 42 is performed by various methods, such as welding, brazing, and crimping | compression-bonding. Further, this joining is performed on the entire circumference of the flange portions 41b and 42b. That is, the hollow portion 43 formed by the saddle-shaped portions 41a and 42a of the first and second metal members 41 and 42 is sealed.

(Operation of the pulsation absorbing member 40)
Next, the operation of the pulsation absorbing member 40 will be described with reference to FIG. 4 (a) and FIG. FIG. 4A shows a case where the pulsation absorbing member 40 is in an initial state, and FIG. 6 shows a state of the pulsation absorbing member 40 when the pressure of the fluid fuel is increased with respect to the initial state. Show.

  The state shown in FIG. 4A is a state where the first metal member 41 and the second metal member 42 are not elastically deformed. In this initial state, when the fluid fuel is pumped from the pump 3 at a set pressure, when the injector 6 connected via the pipe 8 or the like is opened or closed, the fluid fuel flows through the connector 1, and the connector A change in pressure occurs in the fluid fuel flowing through the interior of 1.

  And when it changes so that the pressure of the fluid fuel which distribute | circulates a flow path may become higher than the set pressure with respect to an initial state, as shown in FIG. 6, the outer peripheral surface of the pulsation absorption member 40 is formed. The portion is elastically deformed in the direction toward the central axis of the housing 10 (in the radial direction). That is, it changes so that the cross-sectional area of the fluid flow orthogonal direction in the flow path formed by the outer peripheral surface of the pulsation absorbing member 40 and the inner peripheral surface of the small-diameter portion 11 of the housing 10 increases.

  On the other hand, when the pressure of the fluid fuel flowing through the flow path changes so as to be lower than the set pressure with respect to the initial state, the portion forming the outer peripheral surface of the pulsation absorbing member 40 is a housing, although not shown. 10 is elastically deformed in a direction toward the inner circumferential surface (outside in the radial direction). That is, it changes so that the cross-sectional area of the fluid flow orthogonal direction in the flow path formed by the outer peripheral surface of the pulsation absorbing member 40 and the inner peripheral surface of the small diameter portion 11 of the housing 10 is reduced.

  That is, the case where the fluid fuel is stable at a certain set pressure is defined as an initial state, and the fluid fuel pressure is lower than the set pressure in the initial state. If it does so, the cross-sectional area of the fluid flow orthogonal direction of the flow path formed of the outer peripheral surface of the saddle-shaped parts 41a and 42a of the pulsation absorbing member 40 becomes small. As a result, the flow velocity of the fluid fuel flowing through the flow path formed by the outer peripheral surfaces of the saddle-shaped portions 41a and 42a of the pulsation absorbing member 40 increases. Therefore, a force is generated in a direction in which the pressure of the fluid fuel increases toward the set pressure. That is, when the fluid fuel becomes lower than the set pressure, it acts so as to return to the initial state at an early stage thereafter.

  Thereafter, when the pressure of the fluid fuel becomes higher than the set pressure, the cross-sectional area in the fluid flow orthogonal direction of the flow path formed by the outer peripheral surfaces of the saddle-shaped portions 41a and 42a of the pulsation absorbing member 40 increases. As a result, the flow velocity of the fluid fuel flowing through the flow path formed by the saddle-shaped portions 41a and 42a of the pulsation absorbing member 40 is reduced. Accordingly, a force is generated in a direction in which the pressure of the fluid fuel decreases. Therefore, when the pressure of the fluid fuel becomes higher than the set pressure, it acts so as to return to the initial state at an early stage thereafter. Thus, the pressure change of the fluid fuel flowing through the flow path, that is, the pulsation can be absorbed.

  Furthermore, the pulsation absorbing member 40 is formed of a metal member as described above. Therefore, even when the pulsation absorbing member 40 is repeatedly elastically deformed, it can have high durability. In addition, although the steel plate was mentioned as an example as a material of the pulsation absorption member 40, other iron-type materials, aluminum, magnesium, etc. are applicable. However, when using a steel material, it is inexpensive and can be easily formed into a desired shape.

  Further, in the present embodiment, in the portion where the pulsation absorbing member 40 is disposed, the region between the outer peripheral surface of the pulsation absorbing member 40 and the inner peripheral surface of the small diameter portion 11 of the housing 10 is a region where fluid fuel flows. Become. By making the pulsation absorbing member 40 into a surrounding shape as described above, a sufficient cross-sectional area in the flow orthogonal direction of the flow path can be ensured at the portion where the pulsation absorbing member 40 is disposed. And if the cross-sectional area of the flow path in the direction perpendicular to the fluid flow changes suddenly, there is a risk that smooth flow of the fluid may be hindered. Thus, by making the pulsation absorbing member 40 into a surrounding shape as in the present embodiment, it is possible to suppress the smooth distribution of fluid fuel in the small diameter portion 11.

  Further, the longitudinal lengths of the flange portions 41 b and 42 b of the first and second metal members 41 and 42 are formed longer than the inner diameter of the inner peripheral surface of the small diameter portion 11 of the housing 10. On the other hand, the direction (short direction) orthogonal to the longitudinal direction of the flange portions 41 b and 42 b is shorter than the inner diameter of the inner peripheral surface of the small diameter portion 11 of the housing 10. Here, the longitudinal direction of the flange portions 41b and 42b means a direction connecting the largest portions of the outer edge distances of the ring-shaped flange portions 41b and 42b. Thereby, it can be ensured that the flange portions 41b and 42b over the entire circumference are not arranged so as to face the fluid fuel flowing through the flow path. That is, even if the flange portions 41b and 42b are formed, the flange portions 41b and 42b can be reliably prevented from obstructing the flow of the fluid fuel. Furthermore, by arranging the flange portions 41b and 42b so as to be parallel to the flowing direction of the fluid fuel, a flow path is surely provided between the outer surface of the pulsation absorbing member 40 and the inner peripheral surface of the small diameter portion 11 of the housing 10. Can be secured.

  Furthermore, the pulsation absorbing member 40 is arranged in a floating state in the flow path. That is, the pulsation absorbing member 40 can exert the above-described effect without any positioning in the flow path. At the time of assembly, it becomes very easy to accommodate the pulsation absorbing member 40 in the accommodating space 11 a of the small diameter portion 11 of the housing 10. Therefore, the manufacturing cost can be suppressed.

  In addition, the outer peripheral surfaces (flow channel wall surfaces) of the first and second metal members 41 and 42 of the pulsation absorbing member 40 are formed so as to have portions having substantially the same diameter in the flow direction of the fluid fuel. Thereby, the site | part used as the said diameter among the flow-path wall surfaces of the pulsation absorption member 40 can be made into a site | part which deform | transforms easily compared with another site | part. Therefore, the pulsation absorbing member 40 can reliably exhibit the pulsation absorbing effect.

<Second embodiment>
The pulsation absorbing member 240 of the second embodiment will be described with reference to FIG. The pulsation absorbing member 240 differs from the pulsation absorbing member 40 of the first embodiment in the shapes of the first and second metal members 241 and 242 that are configured. The pulsation absorbing member 240 includes a first metal member 241 and a second metal member 242.

  The first metal member 241 is formed by press-molding a steel plate to form a saddle portion 241a and a ring-shaped flange portion 241b formed so as to project outward at the entire peripheral edge portion on the opening side of the saddle portion 241a. Prepare. The opening edge of the hook part 241a is the same as the hook part 41a of the first embodiment, and is formed in an oval shape having parallel lines in the middle. The bottom surface of the saddle-shaped portion 241a is not curved but is formed in a flat shape.

  The second metal member 242 has the same shape as the first metal member 241. That is, the second metal member 242 includes a saddle portion 242a and a ring-shaped flange portion 242b formed so as to spread outwardly on the entire opening side periphery of the saddle portion 242a by press forming a steel plate. .

  Then, the flange portion 241b of the first metal member 241 and the second metal member 242 are arranged so that the opening side of the hook portion 241a of the first metal member 241 faces the opening side of the hook portion 242a of the second metal member 242. The flange portion 242b is overlapped and joined. Therefore, both the saddle-shaped portions 241a and 242a are integrated with each other and form a surrounding shape in which all radial outer directions are surrounded. Then, a sealed hollow portion 243 is formed.

  The outer peripheral surface (corresponding to the channel wall surface) of the pulsation absorbing member 240 of the present embodiment is formed to have a planar portion. Thereby, a planar site | part can be made into a site | part which deform | transforms easily compared with another site | part among the outer peripheral surfaces of the pulsation absorption member 240. FIG. Therefore, the pulsation absorbing member 240 can reliably exhibit the pulsation absorbing effect.

<Third embodiment>
A connector 300 according to a third embodiment will be described with reference to FIG. The connector 300 of this embodiment differs from the connector 1 of the first embodiment only in the pulsation absorbing member 340. The pulsation absorbing member 340 is formed in a cylindrical shape, and fluid fuel circulates through a through hole penetrating the inside. That is, the inner peripheral surface of the pulsation absorbing member 340 forms a flow path wall surface as a part of the flow path.

  Specifically, the pulsation absorbing member 340 includes a circumferential groove member 341 and a cover member 342. The circumferential groove member 341 is formed into a cylindrical shape by press-molding a steel plate, and an annular groove (corresponding to the “circumferential groove” of the present invention) is formed on the outer circumferential side over the entire circumference. An inner peripheral surface 341a of the circumferential groove member 341 is formed in a cylindrical shape having the same diameter in the axial direction. Further, the groove side walls 341b and 341c of the circumferential groove member 341 are formed to be inclined so that the opening width gradually increases toward the radially outer side.

  The cover member 342 is formed in a cylindrical shape by press forming a steel plate. The cover member 342 covers the outer peripheral side of the circumferential groove member 341 and is joined to the outer peripheral edge of the circumferential groove member 341. The cover member 342 and the circumferential groove member 341 are joined by caulking the outer peripheral ends of the groove side walls 341b and 341c of the circumferential groove member 341. In this way, the pulsation absorbing member 340 forms a cylindrical hollow portion 343.

  In the state where the outer peripheral ends of the groove side walls 341 b and 341 c of the circumferential groove member 341 are bent, the outer diameter of the circumferential groove member 341 is formed to be very slightly smaller than the inner diameter of the small diameter portion 11 of the housing 10. The pulsation absorbing member 340 formed in this way is arranged in the accommodating space 11a of the small diameter portion 11 so as to penetrate the cylindrical through hole in the fluid fuel flow direction in the small diameter portion 11 of the housing 10. At this time, a slight gap is formed between the outer peripheral surface of the pulsation absorbing member 340 and the inner peripheral surface of the small diameter portion 11 of the housing 10. Accordingly, the fluid passes through the through hole of the pulsation absorbing member 340. That is, the inner peripheral surface of the pulsation absorbing member 340 forms a flow path wall surface as a part of the flow path.

  The pulsation absorbing member 340 configured as described above operates as follows. When the pressure of the fluid fuel flowing through the flow path is changed to be higher than the set pressure with respect to the initial state, the inner peripheral surface 341a of the circumferential groove member 341 constituting the pulsation absorbing member 340 is 10 is elastically deformed in a direction toward the inner circumferential surface (outside in the radial direction). That is, it changes so that the cross-sectional area of the fluid flow orthogonal direction in the flow path formed by the inner peripheral surface 341a of the pulsation absorbing member 340 increases.

  On the other hand, when the pressure of the fluid fuel flowing through the flow path is changed to be lower than the set pressure with respect to the initial state, the inner peripheral surface 341a of the circumferential groove member 341 constituting the pulsation absorbing member 340 is Then, it is elastically deformed in the direction toward the central axis of the housing 10 (in the radial direction). That is, it changes so that the cross-sectional area of the fluid flow orthogonal direction in the flow path formed by the inner peripheral surface 341a of the pulsation absorbing member 340 is reduced.

  Therefore, it is possible to absorb the same effect as that obtained by elastically deforming the outer peripheral surface of the pulsation absorbing member 40 in the first embodiment, that is, the pulsation of the fluid. Furthermore, in a portion where the pulsation absorbing member 340 is disposed, a through hole formed by the inner peripheral surface 341a of the pulsation absorbing member 340 becomes a region through which fluid fuel flows. By forming the pulsation absorbing member 340 into a cylindrical shape, fluid fuel can be circulated in the vicinity of the central axis of the housing 10 where the flow velocity is the highest. Thereby, the rapid change of the flow velocity of fluid fuel can be suppressed.

  Further, the inner circumferential surface 341a of the circumferential groove member 341 is configured to be elastically deformed in accordance with a change in fluid pressure. Here, the circumferential groove member 341 has groove side walls 341b and 341c on both sides in the axial direction of the inner circumferential surface as the flow path wall surface. Therefore, it is possible to reliably support the inner peripheral surface 341a, which is a channel wall surface that is elastically deformed. That is, the durability of the circumferential groove member 341 can be sufficiently obtained by using the inner circumferential surface 341a of the circumferential groove member 341 as a flow path wall surface that is elastically deformed.

<Fourth embodiment>
A connector 400 according to a fourth embodiment will be described with reference to FIG. The connector 400 of this embodiment differs from the connector 1 of the first embodiment only in the pulsation absorbing member 440. The pulsation absorbing member 440 is formed in a cylindrical shape, and fluid fuel circulates through a through hole penetrating the inside and an outer peripheral side. That is, the inner peripheral surface and the outer peripheral surface of the pulsation absorbing member 440 form a flow channel wall surface as a part of the flow channel.

  Specifically, the pulsation absorbing member 440 includes a first circumferential groove member 441 and a second circumferential groove member 442. The first circumferential groove member 441 is formed into a cylindrical shape by press forming a steel plate, and forms an annular groove over the entire circumference in the circumferential direction on the outer circumferential side. The inner circumferential surface 441a of the first circumferential groove member 441 is formed in a cylindrical shape having the same diameter in the axial direction. Further, the groove side walls 441b and 441c of the first circumferential groove member 441 are formed to be inclined so that the opening width gradually increases toward the outside in the radial direction.

  The second circumferential groove member 442 is formed into a cylindrical shape by press forming a steel plate, and forms an annular groove over the entire circumference in the circumferential direction on the inner circumferential side. The outer peripheral surface 442a of the second circumferential groove member 442 is formed in a cylindrical shape having the same diameter in the axial direction. Further, the groove side walls 442b and 442c of the second circumferential groove member 442 are formed to be inclined so that the opening width gradually increases toward the inside in the radial direction. Further, the second circumferential groove member 442 covers the outer peripheral side of the first circumferential groove member 441 and is joined to the outer peripheral edge portion of the first circumferential groove member 441 by caulking. Thus, the pulsation absorbing member 440 forms a cylindrical hollow portion 443.

  The outer diameter of the second circumferential groove member 442 is formed to have a gap that allows fluid fuel to flow through the inner diameter of the small diameter portion 11 of the housing 10. The pulsation absorbing member 440 thus formed is arranged in the accommodating space 11 a of the small diameter portion 11 so as to penetrate the cylindrical through hole in the fluid fuel flow direction in the small diameter portion 11 of the housing 10. At this time, in the accommodation space 11a, the fluid fuel flows inside the inner circumferential surface 441a of the first circumferential groove member 441 of the pulsation absorbing member 440 and the outer circumferential surface 442a of the second circumferential groove member 442 of the pulsation absorbing member 440 and the housing. It distribute | circulates between the internal peripheral surfaces of 10 small diameter parts 11. FIG.

  At this time, the inner circumferential surface 441a of the first circumferential groove member 441 and the outer circumferential surface 442a of the second circumferential groove member 442 are elastically deformed in the radial direction in accordance with the pressure change of the fluid. That is, the pulsation absorbing member 440 in the present embodiment has both the effects of the third embodiment in addition to the effects of the first embodiment described above. Therefore, the pulsation reduction effect of the fluid fuel is surely exhibited.

<Fifth embodiment>
A connector 500 according to a fifth embodiment will be described with reference to FIGS. 10 and 11. The connector 500 of this embodiment includes a housing 510, a hose connection portion 20 (shown in FIGS. 2 and 3), a locking member 30 (shown in FIGS. 2 and 3), a pair of pulsation absorbing members 540 and 550, A first housing magnet 580 and a second housing magnet 590 are included.

  The housing 510 differs from the housing 10 of the first embodiment only in the small diameter portion 511. The inner diameter of the small diameter portion 511 is formed to be approximately the same as the outer diameter of the tip portion of the pipe 8 inserted into the housing 510. And an annular fitting inner peripheral surface is formed so that a part of inner peripheral surface of the small diameter part 511 may fit with the outer peripheral surface of the front-end | tip part of this pipe 8. FIG. The small-diameter portion 511 forms an accommodation space 511 a for accommodating a pulsation absorbing member 540 described later between the axial direction between the downstream end surface of the hose connection portion 20 and the distal end surface of the pipe 8.

  Further, on the inner peripheral surface of the small diameter portion 511, the first and second concave portions 511d and 511e (corresponding to the “guide member” of the present invention) are symmetrically directed to the outer sides in the radial direction on both sides. ) Is formed. The first recess 511d forms a recess that guides the first pulsation absorbing member 540 so as to be capable of reciprocating in the radial direction. The 2nd recessed part 511e has comprised the recessed part which guides the 2nd pulsation absorption member 550 so that a reciprocation is possible to radial direction. That is, the first and second recesses 511d and 511e regulate the moving direction of the first and second pulsation absorbing members 540 and 550.

  Further, in the small-diameter portion 511, a first protrusion 511b protruding outward in the radial direction is formed on the outer peripheral surface of the portion where the first recess 511d is formed. A first housing magnet 580 is embedded in the first protrusion 511b. The first housing magnet 580 is arranged so that the radially inner side becomes the south pole. In the small diameter part 511, the 2nd protrusion 511c which protrudes to a radial direction outer side is formed in the outer peripheral surface in the site | part in which the 2nd recessed part 511e is formed. A second housing magnet 590 is embedded in the second protrusion 511c. The second housing magnet 590 is arranged so that the radially inner side is the S pole.

  The first pulsation absorbing member 540 is formed into a home base type having a side face shape shown in FIG. 10A having a sharp lower end, and is formed into a shape that can be accommodated in the first recess 511d. That is, the first pulsation absorbing member 540 is arranged so that the position where the central axis side of the housing 510 is pointed is located. The first pulsation absorbing member 540 includes a first floating magnet 541 (corresponding to the “third magnet” of the present invention) and a resin coating member 542 that covers the entire peripheral surface of the first floating magnet 541. Is done. The first floating magnet 541 is arranged so that the north pole is on the central axis side of the housing 510 and the groove bottom side of the first recess 511d is the south pole.

  Similarly to the first pulsation absorbing member 540, the second pulsation absorbing member 550 is formed in a home base type and is formed in a shape that can be accommodated in the second recess 511e. That is, the second pulsation absorbing member 550 is disposed so that a position where the central axis side of the housing 510 is pointed is located. The second pulsation absorbing member 550 includes a second floating magnet 551 (corresponding to the “third magnet” of the present invention) and a resin-made covering member 552 that covers the entire peripheral surface of the second floating magnet 551. Is done. The second floating magnet 551 is arranged so that the north pole is on the central axis side of the housing 510 and the groove bottom side of the second recess 511e is the S pole.

  And the 1st pulsation absorption member 540 and the 2nd pulsation absorption member 550 are arrange | positioned so that it may mutually oppose in the radial direction of the small diameter part 511 of the housing 510, and both opposing surfaces mutually space apart and approach. It is provided so as to be movable. And the opposing surface of the 1st, 2nd pulsation absorption members 540 and 550 forms a part of flow-path wall surface which distribute | circulates fluid fuel. That is, when the distance between the opposing surfaces of the first and second pulsation absorbing members 540 and 550 increases, the cross-sectional area of the flow path in the direction perpendicular to the fluid flow increases, and conversely, the first and second pulsation absorbing members 540 and 550. When the distance between the opposing surfaces of the channel becomes smaller, the cross-sectional area of the flow channel in the direction perpendicular to the fluid flow becomes smaller.

  Further, the central axis side of the housing 510 in the first floating magnet 541 is N-pole, and the central axis side of the housing 510 in the second floating magnet 551 is also N-pole. That is, magnets having the same magnetic pole are disposed on the opposing surfaces of the first and second floating magnets 541 and 551. Here, the magnets on the opposing surfaces of the first and second floating magnets 541 and 551 correspond to “a pair of first magnets” in the present invention. Therefore, the first and second pulsation absorbing members 540 and 550 are subjected to forces to be separated from each other by the action of the repulsive force (magnetic force) of the first and second floating magnets 541 and 551.

  The first recess 511d side of the first pulsation absorbing member 540 is the S pole, and the inner peripheral side of the first housing magnet 580 embedded in the first protrusion 511b of the small diameter portion 511 is also the S pole. That is, a magnet serving as the same magnetic pole is disposed on the opposing surface of the first pulsation absorbing member 540 and the first recess 511d. Here, the magnets on the opposing surfaces of the first floating magnet 541 and the first housing magnet 580 correspond to “a pair of second magnets” in the present invention. Accordingly, the first pulsation absorbing member 540 is acted on by the action of the repulsive force (magnetic force) of the first floating magnet 541 and the first housing magnet 580 to force the first pulsation absorbing member 540 away from the bottom surface of the first recess 511d of the small diameter portion 511. In other words, the repulsive force is a force in a direction in which the first pulsation absorbing member 540 is brought closer to the second pulsation absorbing member 550.

  The second recess 511e side of the second pulsation absorbing member 550 is the S pole, and the inner peripheral side of the second housing magnet 590 embedded in the second protrusion 511c of the small diameter portion 511 is also the S pole. That is, a magnet serving as the same magnetic pole is disposed on the opposing surface of the second pulsation absorbing member 550 and the second recess 511e. Here, the magnets on the opposing surfaces of the second floating magnet 551 and the second housing magnet 590 correspond to “a pair of second magnets” in the present invention. Therefore, due to the action of the repulsive force (magnetic force) of the second floating magnet 551 and the second housing magnet 590, the second pulsation absorbing member 550 exerts a force that tends to separate from the bottom surface of the second recess 511 e of the small diameter portion 511. In other words, the repulsive force is a force in a direction in which the second pulsation absorbing member 550 is brought closer to the first pulsation absorbing member 540.

  Thus, the first and second floating magnets 541 and 551 and the first and second housing magnets 580 and 590 allow the first pulsation absorbing member 540 and the second pulsation absorbing member 550 to accommodate the small-diameter portion 511. The floating state is maintained in 511a. However, when the fluid pressure in the accommodating space 511a of the small diameter portion 511 is a set pressure, the magnetic force and size of each magnet are set so that the first and second pulsation absorbing members 540 and 550 are in desired positions. It is set.

  In the connector 500 configured as described above, when the pressure of the fluid fuel flowing through the flow path changes so as to be higher than the initial state, the repulsive force of the first floating magnet 541 and the first housing magnet 580, and the first The first and second pulsation absorbing members 540 and 550 move radially outward against the repulsive force of the two floating magnets 551 and the second housing magnet 590. If it does so, the cross-sectional area of the fluid flow orthogonal direction of a flow path will expand.

  On the other hand, when the pressure of the fluid fuel flowing through the flow path changes so as to be lower than the initial state, the repulsive force of the first floating magnet 541 and the first housing magnet 580, and the second floating magnet 551 and the second housing. Due to the repulsive force of the magnet 590, the first and second pulsation absorbing members 540, 550 move radially inward and approach each other. If it does so, the cross-sectional area of the fluid flow orthogonal direction of a flow path will reduce. However, since the opposing surfaces of the first floating magnet 541 and the second floating magnet 551 are the same magnetic pole, there is always a gap between the opposing surfaces of the first and second pulsation absorbing members 540 and 550 by this repulsive force. A state is formed.

  According to the connector 500 of the present embodiment, the first and second pulsation absorbing members 540 and 550 are positioned in the flow path by the action of the magnet. When the pressure of the fluid fuel changes based on the positioned state, the first and second pulsation absorbing members 540 and 550 move in the radial direction according to the pressure, and the fluid flow orthogonal direction of the flow path Enlarge or reduce the cross-sectional area of. By this operation, the pulsation of the fluid fuel can be reliably suppressed.

  Further, by restricting the moving direction of the first and second pulsation absorbing members 540 and 550 by the first and second recesses 511d and 511e, the fluid fuel can be reliably passed through the first and second pulsation absorbing members 540 and 550. It can move in the orthogonal direction. Therefore, when the pressure of the fluid fuel changes, the opposing surfaces of the first and second pulsation absorbing members 540 and 550 can be reliably operated so as to be separated from and approach each other.

  Further, the opposing surfaces of the first and second pulsation absorbing members 540 and 550 are formed so as to become thinner toward the tip side. Thereby, it can suppress that the cross-sectional area of the fluid flow orthogonal direction of a flow path changes rapidly. Therefore, smooth fluid fuel distribution can be ensured. Further, when the pressure of the fluid fuel becomes low, the first and second pulsation absorbing members 540 and 550 move in the approaching direction. At this time, when the pressure suddenly changes, there is a possibility that the flow path may be blocked by instantaneous contact between the opposing surfaces. However, even in such a case, by making the facing surface thinner toward the tip side, it is possible to narrow the range of blocking the flow path, and to minimize the influence of blocking the flow path.

  The first and second pulsation absorbing members 540 and 550 are guided so as to have a gap with respect to the first and second recesses 511d and 511e. This makes it very easy to install the first and second pulsation absorbing members 540 and 550 in the housing 510.

  By the way, since there is a gap, fluid fuel can flow inside the first and second recesses 511d and 511e. If the pressure fluctuation of the fluid acts on the radially inner side and the radially outer side of the first and second pulsation absorbing members 540 and 550, the first and second pulsation absorbing members 540 and 550 may not move. However, the gap between the first and second pulsation absorbing members 540 and 550 and the side surfaces of the first and second recesses 511d and 511e is larger than the space between the first and second pulsation absorbing members 540 and 550. It is formed small. Thereby, when the pressure of fluid fuel becomes high, it can move to the direction where the mutually opposing surfaces of the 1st, 2nd pulsation absorption members 540 and 550 separate. Therefore, the effect of reducing pulsation is surely exhibited while facilitating assembly.

<First embodiment>
DESCRIPTION OF SYMBOLS 1: Connector, 2: Fuel tank, 3: Pump, 4: Hose 5: Fuel delivery pipe, 6: Injector, 7: Cylinder 8: Pipe, 8a: Annular convex part 10: Housing, 11: Small diameter part, 11a: Accommodating Space: 12: Medium-diameter portion 13: Large-diameter portion, 13a, 13a: Flat wall portion, 13b, 13b: Arc wall portion 13c: Window portion, 20: Hose connection portion, 21: Shaft hole, 22: Circular sharp protrusion 30 : Locking member, 31: Locking claw part, 32: Slit, 33: Operation arm 40: Pulsation absorbing member, 41, 42: Metal member, 41a, 42a: Saddle part 41b, 42b: Flange part, 43: Hollow Part, 61: ring 62: collar member, 63: bush <second embodiment>
240: Pulsation absorbing member, 241, 242: Metal member, 241a, 242a: Saddle-shaped part 241b, 242b: Flange part, 243: Hollow part <Third embodiment>
300: connector, 340: pulsation absorbing member, 341: peripheral groove member, 341a: inner peripheral surface 341b, 341c: groove side wall, 342: cover member, 343: hollow portion <fourth embodiment>
400: Connector, 440: Pulsation absorbing member, 441: First circumferential groove member 441a: Inner circumferential surface, 441b, 441c: Groove sidewall 442: Second circumferential groove member, 442a: Outer circumferential surface, 442b, 442c: Groove sidewall 443: Hollow part <fifth embodiment>
500: Connector, 510: Housing, 511: Small diameter part, 511a: Storage space 511b: First protrusion, 511c: Second protrusion, 511d: First recess 511e: Second recess, 540: Pulsation absorbing member, 540: First Pulsation absorbing member 541: first floating magnet, 542: covering member, 550: second pulsation absorbing member 551: second floating magnet, 552: covering member, 580: first housing magnet 590: second housing magnet

Claims (17)

A housing formed in a cylindrical shape and forming a flow path through which the first fluid flows on the inner peripheral surface;
A flow passage wall surface forming a part of the flow passage, and when the pressure of the first fluid flowing through the flow passage increases, a cross-sectional area of the flow passage perpendicular to the flow passage formed by the flow passage wall surface is The flow passage wall surface is moved so as to expand, and when the pressure of the first fluid decreases, the flow passage wall surface is reduced so that the cross-sectional area of the flow passage formed in the flow passage orthogonal direction of the flow passage is reduced. A pulsation absorbing member to be moved;
A connector comprising: A housing formed in a cylindrical shape and forming a flow path through which the first fluid flows on the inner peripheral surface;
It is disposed in the flow path, is formed in a hollow shape by a metal member that can be elastically deformed, the second fluid is sealed inside the hollow, and has a flow path wall surface that forms a part of the flow path, and flows through the flow path When the pressure of the first fluid increases, the flow path wall surface is elastically deformed so as to expand the cross-sectional area of the flow path formed by the flow path wall surface in the direction perpendicular to the fluid flow, and the pressure of the first fluid is increased. A pulsation absorbing member that elastically deforms the flow path wall so as to reduce the cross-sectional area of the flow path perpendicular to the flow direction formed by the flow path wall when lowered,
A connector comprising: In claim 2,
The pulsation absorbing member is formed in a surrounding shape that surrounds all radial outer directions,
Of the pulsation absorbing member, the outer peripheral surface facing the inner peripheral surface of the housing forms the flow channel wall surface as a part of the flow channel,
When the pressure of the first fluid flowing through the flow path is increased, the flow path wall surface is set to the central axis of the housing so as to increase the cross-sectional area of the flow path formed in the flow path orthogonal direction. Elastically deform in the direction to go,
When the pressure of the first fluid decreases, the flow path wall surface is elastically deformed in the direction toward the inner peripheral surface of the housing so as to reduce the cross-sectional area of the flow path formed in the flow path wall surface in the direction perpendicular to the fluid flow direction. Connector characterized by letting it. In claim 3,
The pulsation absorbing member is formed by a pair of metal plate members having the same shape,
Each of the metal plate members includes a saddle portion formed into a saddle shape, and a flange portion projecting outward at the entire peripheral edge portion of the saddle shape portion,
The pulsation absorbing member is formed by overlapping and joining the flange portions of the respective metal plate members,
The connector, wherein the pulsation absorbing member is disposed in the flow path so that a part of the saddle-shaped part forms the flow path wall surface. In claim 4,
The length in the longitudinal direction of the flange portion is formed to be longer than the inner diameter of the inner peripheral surface of the housing where the pulsation absorbing member is disposed,
The connector is characterized in that a direction perpendicular to the longitudinal direction of the flange portion is formed shorter than an inner diameter of an inner peripheral surface of a portion of the housing where the pulsation absorbing member is disposed. In claim 2,
The pulsation absorbing member is formed in a cylindrical shape and is disposed so as to penetrate in the flow direction of the first fluid in the flow path.
A cylindrical inner peripheral surface of the pulsation absorbing member forms the flow channel wall surface as a part of the flow channel,
When the pressure of the first fluid flowing through the flow path becomes high, the flow path wall surface is formed on the inner peripheral surface of the housing so as to increase the cross-sectional area of the flow path formed in the flow path orthogonal direction. Elastically deform in the direction toward
When the pressure of the first fluid decreases, the flow path wall surface is elastically deformed in a direction toward the central axis of the housing so as to reduce a cross-sectional area of the flow path formed in the flow path wall surface in a direction perpendicular to the fluid flow direction. A connector characterized by that. In claim 6,
The pulsation absorbing member is
A circumferential groove member is formed on the outer peripheral side, and an inner circumferential surface is formed as the flow path wall surface;
A cover member that covers the outer peripheral side of the circumferential groove member and is joined to the outer peripheral edge of the circumferential groove member;
A connector comprising: In claim 6,
Of the pulsation absorbing member, the outer peripheral surface facing the inner peripheral surface of the housing forms the second flow path wall surface as a part of the flow path,
When the pressure of the first fluid flowing through the flow path increases, the second flow path wall surface is expanded so that the cross-sectional area in the fluid flow orthogonal direction of the flow path formed by the second flow path wall surface is enlarged. Elastically deforming in a direction toward the central axis of the housing,
When the pressure of the first fluid is reduced, the second channel wall surface is formed on the inner peripheral surface of the housing so as to reduce the cross-sectional area of the channel formed by the second channel wall surface in the direction perpendicular to the fluid flow direction. A connector characterized by being elastically deformed in a direction toward the head. In any one of Claims 2-8,
The connector, wherein the pulsation absorbing member is arranged in a floating state in the flow path. In any one of Claims 2-9,
The connector, wherein the flow passage wall surface of the pulsation absorbing member is formed so as to have a portion having the same diameter in the flow direction of the fluid. In any one of Claims 2-10,
The flow path wall surface of the pulsation absorbing member is formed so as to have a planar portion. In any one of Claims 2-11,
The connector, wherein the second fluid is air. A housing formed in a cylindrical shape and forming a flow path through which the first fluid flows on the inner peripheral surface;
Opposed to be formed by a pair of opposed members, arranged in the flow path, forming a flow path wall surface that is a part of the flow path by surfaces facing each other, and forming the flow path wall surface in the flow path A pair of pulsation absorbing members provided so as to be movable so as to be spaced apart and approach each other;
A pair of first magnets arranged so as to have the same magnetic poles on the opposing surfaces of the pair of pulsation absorbing members, and separating the opposing surfaces of the pair of pulsation absorbing members by mutual repulsive forces;
A pair of second pulsation absorbing members that are arranged on the opposing surfaces of the pair of pulsation absorbing members and the housing so as to have the same magnetic pole, and exert a force in a direction in which the pair of pulsation absorbing members are brought close to each other by mutual repulsive forces. A magnet,
With
When the pressure of the first fluid flowing through the flow path increases, the cross-sectional area in the direction perpendicular to the fluid flow of the flow path formed by the flow wall surface against the repulsive force between the pair of second magnets is enlarged. The pulsation absorbing member is moved so that, when the pressure of the first fluid is reduced, the pulsation absorbing member is moved so as to reduce the cross-sectional area of the flow path formed by the flow path wall surface in the direction perpendicular to the fluid flow. Connector characterized by letting it. In claim 13,
The housing includes a pair of guide members extending in a direction orthogonal to the flow direction of the first fluid in the flow path on both sides opposed from a cylindrical central axis,
Each of the pulsation absorbing members is restricted by each of the guide members, so that the opposed surfaces forming the flow channel wall surface in the flow channel can be moved away from and approaching each other. Connector. In claim 13 or 14,
The connector, wherein the opposing surfaces of the pair of pulsation absorbing members are formed so as to be thinner toward the distal end side. In any one of Claims 13-15,
Each of the pulsation absorbing members includes a third magnet having one magnetic pole on the opposing surface and the other magnetic pole on the opposite side to the inner peripheral surface of the housing, and a covering member that covers the third magnet. Prepared,
The connector, wherein the third magnet corresponds to a pair of the first magnets and a magnet provided on the pulsation absorbing member of the pair of second magnets. In any one of Claims 13-16,
Between the said pulsation absorption member and the said housing, said 1st fluid can distribute | circulate and the clearance gap smaller than the opposing space formed of the opposing surface of a pair of said pulsation absorption member is formed. Characteristic connector.

Images