JP2021116744A - Pressure control unit - Google Patents

Abstract

To provide a conventionally required pressure control unit which is inexpensive and easy to be mass-produced, while considering that it is difficult to be mass-produced and expensive when a cover member and a housing are formed with cutting work and facilities are necessary for pressing the highly rigid cover member into the housing with a high press-in load without flexing it.SOLUTION: A pressure control unit 50 includes a housing 60 having a valve seat 62 and an inflow port 64, a ball 54 for opening/closing the inflow port 64 in cooperation with the valve seat 62, a coil spring 56 for energizing the ball 54 toward the valve seat 62, and a cover member 70 for holding the coil spring 56 on the housing 60, the housing 60 and the cover member 70 consisting of face parts 60b, 70b extending linearly in at least one direction, and bent parts 60a, 70a bent at the ends of the face parts 60b, 70b, the face parts 60b, 70b having thicknesses stepwise changed from the centers of the housing 60 and the cover member 70 to the outside, respectively.SELECTED DRAWING: Figure 6

Description

The present invention relates to, for example, a pressure regulator provided in a pump module arranged in a fuel tank of a vehicle to adjust the pressure of a fluid in a fuel passage.

Fuel tanks are installed in vehicles such as automobiles and motorcycles that run on engines. In addition, the vehicle is provided with a fuel pump for supplying fuel from the fuel tank to the engine. The fuel pump needs to deliver fuel at a predetermined pressure. Therefore, a pressure adjusting device for adjusting the fuel pressure is provided in the fuel passage of the fuel pump.

A conventional example of the pressure adjusting device will be described. As shown in FIG. 7, the pressure adjusting device 90 is exteriorized by the housing 94. The housing 94 has a tributary passage 100 of the fuel passage and a fitting recess 94a recessed in a columnar shape on the downstream side of the tributary passage 100. The tributary passage 100 and the fitting recess 94a are connected to each other. The pressure adjusting valve 92 is configured by accommodating the ball 54 (valve body), the pressing member 58, the coil spring 56 (biasing member), and the cover member 102 in the fitting recess 94a. Fuel flows into the pressure regulating valve 92 from the tributary passage 100. The connecting portion between the tributary passage 100 and the fitting recess 94a is provided as an inflow port 98 of the pressure adjusting valve 92. The housing 94 has a valve seat 96 capable of contacting the ball 54 on the fitting recess 94a side of the inflow port 98.

As shown in FIG. 7, the cover member 102, the coil spring 56, the pressing member 58, and the ball 54 are arranged in this order from the downstream side in the fitting recess 94a. A discharge port 104 of the pressure regulating valve 92 opens at the center of the cover member 102. The cover member 102 fits with the fitting recess 94a to hold the coil spring 56. The coil spring 56 urges the pressing member 58 toward the valve seat 96 on the upstream side. The pressing member 58 presses the ball 54 toward the valve seat 96. When the ball 54 is pressed against the valve seat 96, the inflow port 98 is closed. When the pressure of the fuel on the tributary passage 100 side overcomes the urging force of the coil spring 56, the ball 54 is pushed downstream and the inflow port 98 is opened. The tributary passage 100 has a throttle portion 100a on the upstream side of the inflow port 98. The throttle portion 100a is a portion having a particularly small diameter in the tributary passage 100, and regulates the flow rate of fuel.

The housing 94 and the cover member 102 are arranged on the fuel flow path. Therefore, when the housing 94 and the cover member 102 are provided with, for example, resin, there is a risk of absorbing fuel and expanding. When the housing 94 and the cover member 102 expand, the urging force of the coil spring 56 changes. Therefore, the housing 94 and the cover member 102 are formed by processing, for example, a metal material having high resistance to fuel.

The conventional cover member 102 receives a reaction force from the coil spring 56 in the direction of the discharge port 104. Therefore, the cover member 102 needs to have high rigidity. Further, in order to fit the highly rigid cover member 102 with the fitting recess 94a without bending, it is necessary to press-fit with a large press-fit load. Therefore, the conventional cover member 102 is formed by, for example, cylindrically cutting a cylindrical metal material.

The housing 94 needs to have rigidity that can withstand when the cover member 102 is press-fitted into the fitting recess 94a. Further, the housing 94 is provided with a fitting recess 94a having different diameters and a tributary passage 100. In particular, the tributary passage 100 has a smaller diameter throttle portion 100a. Therefore, in the conventional housing 94, in many cases, the fitting recess 94a is formed by cylindrically cutting a metal material. A pressure adjusting device according to the above-mentioned conventional pressure adjusting device 90 is described in, for example, Patent Document 1.

Japanese Unexamined Patent Publication No. 2008-138785

When the cover member and the housing are formed by cutting, mass production is difficult and the cost is high. Further, in order to press-fit the highly rigid cover member into the housing without bending, it is necessary to press-fit with a large press-fit load. Therefore, the equipment cost for press fitting is also high. Therefore, a pressure regulator that is inexpensive and easy to mass-produce has been conventionally required.

One feature of the present disclosure is a pressure regulator, which is a housing having a valve seat and an opening, a valve body that opens and closes the opening in cooperation with the valve seat, and urges the valve body toward the valve seat. The urging member and the cover member for holding the urging member in the housing are provided. The housing and cover member are composed of a face portion extending linearly in at least one direction and a bent portion bent at an end portion of the face portion. The thickness of the face portion gradually changes from the center of the housing and the cover member to the outside.

Therefore, the face portion and the bent portion can be formed by bending a flat plate-shaped material. Therefore, it is easy to mass-produce the housing and the cover member, and the manufacturing cost is low. Further, since the cover member is composed of a surface portion and a bent portion, the cover member has high elasticity. Therefore, the press-fitting load for press-fitting the cover member into the housing can be reduced. Therefore, when assembling the cover member to the housing, it can be assembled with simple equipment, and workability is good.

According to another feature of the present disclosure, the surface portion located at the outermost peripheral end portion on the outermost peripheral side of the cover member is inclined so as to open outward in the radial direction. Therefore, the surface portion of the outer peripheral end portion is elastically pressed against the inner wall of the housing while being inclined so as to open outward in the radial direction. Therefore, the cover member can be held in the housing by utilizing the elasticity of the cover member. Moreover, since the elasticity of the cover member is utilized, the cover member 70 can be held in the housing even when it is difficult to secure the rigidity of the housing, for example. Further, the surface portion of the outer peripheral end portion is elastically pushed inward in the radial direction by the inner wall of the housing when it is press-fitted into the housing. Therefore, the cover member is press-fitted into the housing with its outer diameter small. As a result, the cover member can be easily press-fitted into the housing.

According to another feature of the present disclosure, the outer peripheral end is arranged so as to extend outward from the inside of the housing. Therefore, the outer peripheral end portion extends toward the rear side in the press-fitting direction when the cover member is press-fitted into the housing. Therefore, the outer peripheral end portion is prevented from being caught on the inner wall of the housing. Thus, the press-fitting load for press-fitting the cover member into the housing can be reduced. Further, when the cover member is held in the housing, the outer peripheral end portion is likely to be caught on the inner wall of the housing in the pulling direction. Thus, the cover member can be made difficult to come out of the housing.

According to other features of the present disclosure, the corners of the outer peripheral edge are in contact with the inner wall of the housing. Therefore, the corner portion of the outer peripheral end portion is pressed against the inner wall of the housing by the elasticity of the cover member. That is, the outer peripheral end portion is arranged in the housing so as to be inclined so as to extend in the extending direction with respect to the inner wall of the housing. This enhances the holdability of holding the cover member in the housing.

According to other features of the present disclosure, the face portion of the housing is thicker than the face portion of the cover member. Therefore, the rigidity of the housing is higher than the rigidity of the cover member. As a result, it is possible to prevent the housing from being deformed by the press-fitted cover member.

According to other features of the present disclosure, the housing and cover members are formed by stamping. Therefore, it is easy to mass-produce the housing and the cover member. In addition, the processing cost of the housing and the cover member can be reduced.

According to another feature of the present disclosure, the pressure regulator includes a throttle portion formed upstream of the housing. Therefore, the housing and the throttle portion can be formed separately. Therefore, the housing can be formed without requiring high processing accuracy. As a result, the processing cost of the housing can be reduced.

It is a perspective view which shows the pump module which concerns on this embodiment. It is a side view which shows the mounting position of a pump module with respect to a fuel tank. It is sectional drawing which shows the fuel delivery path of a pump module. It is an exploded perspective view which separated the pressure control valve from a set plate. It is an exploded side view of a pressure control valve. It is sectional drawing of the pressure adjustment valve in the cross section along the fuel delivery direction. It is sectional drawing which shows the pressure adjustment apparatus of the conventional example.

One embodiment of the present disclosure will be described in detail below with reference to FIGS. 1-6. The same reference number in the description means the same element having the same function without duplicate explanation. As shown in FIG. 2, one embodiment is a pump module 12 installed in a fuel tank 10 of a vehicle such as a two-wheeled vehicle and supplying fuel in the fuel tank 10 to an engine.

[Fuel tank]
The fuel tank 10 is a container for storing liquid fuel such as gasoline for an engine, and is made of metal, for example. As shown in FIG. 2, the fuel tank 10 has, for example, an opening 11 at the bottom. In FIG. 2, only the bottom of the fuel tank 10 is shown by a broken line. Therefore, as seen in FIG. 2, the upper side of the bottom is the inside of the tank, and the lower side is the outside.

[Pump module]
As shown in FIGS. 1 to 3, the pump module 12 includes a resin structure, which is also referred to as a set plate 14. The pump module 12 is an assembly in which a fuel pump 16, a pump holding member 18, a fuel filter 20, a pressure adjusting device 50, and the like are assembled to a set plate 14. The set plate 14 includes a lid portion 22 that closes the opening 11 of the fuel tank 10, and holds the fuel pump 16 and the fuel filter 20 with respect to the fuel tank 10. The pump module 12 is a so-called in-tank type. The fuel pump 16 is held inside the fuel tank 10. The lid portion 22 includes a lid plate 24 having an outer diameter larger than the diameter of the opening 11 of the fuel tank 10, and a fitting wall 26 protruding from the upper surface of the lid plate 24 toward the inside of the fuel tank 10. By fitting the fitting wall 26 into the opening 11, the lid plate 24 closes the opening 11 of the fuel tank 10. At the same time, the set plate 14 is mounted on the fuel tank 10.

As shown in FIGS. 2 and 3, the set plate 14 has a passage forming portion 28 extending from the lid portion 22 toward the inside (upper side) of the fuel tank 10. A fuel passage 30 is formed inside the passage forming portion 28. A fuel discharge pipe 32 communicating with the fuel passage 30 inside the passage forming portion 28 is provided on the outside (lower side) of the fuel tank 10. A fuel supply pipe connected to an engine injector is connected to the fuel discharge pipe 32. The fuel passage 30 and the fuel discharge pipe 32 inside the passage forming portion 28 form a series of fuel delivery paths of the pump module 12.

[Fuel pump]
The fuel pump 16 shown in FIG. 1 is an electric pump that boosts the fuel taken in from the suction port and discharges it from the discharge port. The fuel pump 16 is configured such that, for example, an impeller type pump and an electric motor are housed in a pump housing. A pump fitting portion 34 having a tubular peripheral wall is formed in the passage forming portion 28. The pump fitting portion 34 is formed on the side portion of the passage forming portion 28. In the fuel pump 16, a portion of the pump housing on the discharge port side is inserted into the pump fitting portion 34. When the fuel pump 16 is inserted into the pump fitting portion 34, the discharge port of the fuel pump 16 communicates with the fuel passage 30 (see FIG. 3) provided inside the set plate 14.

As shown in FIG. 2, an electric connector 36 is provided on the tank outer side (lower side) of the lid portion 22 of the set plate 14. The electric connector 36 can connect an electric wire connected to a power source, an engine control unit (ECU), or the like outside the tank. The electric circuit of the electric motor of the fuel pump 16 (see FIG. 1) is electrically connected to the electric connector 36 via the lead wire 38.

[Pump holding member]
As shown in FIG. 1, the pump holding member 18 is a cap-shaped resin casing having a tubular peripheral wall portion and a bottom portion that closes one end of the peripheral wall portion. The pump holding member 18 is put on a portion on the suction port side of the fuel pump 16 inserted into the pump fitting portion 34. The peripheral wall portion of the pump holding member 18 is coupled to the pump fitting portion 34 by, for example, a snap mechanism.

[Fuel filter]
As shown in FIG. 1, the fuel filter 20 is formed in a bag shape by a sheet-like filter material such as a non-woven fabric that allows the fuel to pass through and remove foreign substances in the fuel. Inside the fuel filter 20, a resin inner bone member for holding the fuel filter 20 in the expanded state is housed. The fuel filter 20 is attached to the pump holding member 18 via a resin connecting pipe 40, for example, by a snap mechanism. The connection pipe 40 communicates with the suction port of the fuel pump 16 through the connection port penetrating the bottom of the pump holding member 18 by attaching the fuel filter 20 to the pump holding member 18.

[Pressure regulator]
The pressure adjusting device 50 shown in FIG. 3 adjusts the pressure of the fuel in the fuel delivery path. The pressure adjusting device 50 is arranged in a tributary passage 42 separated from the fuel passage 30. The pressure adjusting device 50 is exteriorized by a passage forming portion 28 having a cylindrical outer shape. The pressure regulating device 50 has a pressure regulating valve 52 that regulates the inflow of fuel into the tributary passage 42 by opening and closing the valve. The passage forming portion 28 is provided with a tributary passage 42 and a fitting recess 80 which is recessed so as to communicate with the downstream side of the tributary passage 42. A pressure adjusting valve 52 is assembled in the fitting recess 80.

As shown in FIGS. 3 and 5, the pressure regulating valve 52 has a cup-shaped housing 60. Inside the housing 60, a ball 54 that functions as a valve body, a pressing member 58 that presses the ball 54, a coil spring 56 (a urging member) that urges the pressing member 58, and a cover that holds the coil spring 56. The member 70 is assembled. A ball 54, a pressing member 58, a coil spring 56, and a cover member 70 are arranged in this order from the bottom side (inside) of the cup shape in the housing 60. The coil spring 56 is interposed between the pressing member 58 and the cover member 70.

As shown in FIGS. 4 and 6, the housing 60 is arranged with the cup-shaped bottom side on the tributary passage 42 side (upstream side). A circular inflow port 64 opens at the bottom of the housing 60. A valve seat 62 is formed inside the housing 60 along the inflow port 64. The valve seat 62 is formed in an arc shape that follows the outer shape of the ball 54. The housing 60 has a flange portion 66 extending radially outward from the outer peripheral end portion on the downstream side. At least one flange portion 66 is provided, and for example, a pair of collar portions 66 are provided at point-symmetrical positions.

As shown in FIGS. 4 and 6, the housing 60 is composed of a surface portion 60b extending linearly in at least one direction and a bent portion 60a having a bent shape at an end portion of the surface portion 60b. The surface portion 60b is, for example, a flat surface, a cylindrical surface, or a conical surface. The surface portion 60b extends linearly along, for example, the radial direction and the opening direction of the housing 60. The bent portion 60a bends in the circumferential direction of the housing 60 and bends in the radial direction of the housing 60.

As shown in FIG. 6, the pressing member 58 is formed with a substantially flat surface on the upstream side in contact with the ball 54, and a recess 58a is provided in the central portion. When the ball 54 is pressed by the pressing member 58, the upstream side abuts the valve seat 62 and the downstream side abuts the recess 58a. As a result, the ball 54 is positioned on the valve seat 62 in a stable state. The pressing member 58 is urged by the coil spring 56 toward the upstream side where the valve seat 62 is provided.

The coil spring 56 shown in FIG. 6 presses the ball 54 to the upstream side where the valve seat 62 is provided via the pressing member 58. The valve seat 62 is closed by the ball 54 pressed by the coil spring 56 when the fuel pressure in the fuel delivery path and the tributary passage 42 (see FIG. 3) is low. When the pressure of the fuel increases to overcome the elastic force of the coil spring 56, the ball 54 is pushed by the fuel and the inflow port 64 is opened. As a result, fuel flows into the housing 60. Fuel is discharged from the discharge port 72 through the pressure regulating valve 52 until the fuel delivery path reaches a predetermined pressure. The discharged fuel is returned to the external fuel tank 10 (see FIG. 2).

As shown in FIGS. 4 and 6, the cover member 70 has a substantially circular cap shape. The cover member 70 is composed of a surface portion 70b extending linearly in at least one direction and a bent portion 70a having a bent shape at an end portion of the surface portion 70b. The surface portion 70b is, for example, a flat surface, a cylindrical surface, or a conical surface. The surface portion 70b extends linearly, for example, along the radial direction of the cover member 70 and the press-fitting direction into the housing 60. The bent portion 70a bends in the circumferential direction of the cover member 70 and bends in the radial direction of the cover member 70. The cover member 70 has a substantially W-shaped cross section along the press-fitting direction by being bent at the plurality of bent portions 70a.

As shown in FIG. 6, a discharge port 72 capable of discharging fuel from the pressure adjusting valve 52 opens at the center of the cover member 70. The discharge port 72 is always open so that the downstream end of the pressing member 58 can enter. The coil spring 56 is held by the surface portion 70b on the peripheral edge of the discharge port 72. The surface portion 70b of the outer peripheral end portion 70c arranged on the outermost peripheral side of the cover member 70 extends so as to open outward in the radial direction of the cover member 70. Further, the surface portion 70b of the outer peripheral end portion 70c is inclined outward in the radial direction of the cover member 70 from the bottom side (lower side in the drawing) of the housing 60 toward the opening side (upper side in the drawing) of the housing 60 where the flange portion 66 is provided. And are placed. The corner portion 70d of the outer peripheral end portion 70c is in contact with the inner wall 60c of the housing 60. The outer peripheral end portion 70c urges the inner wall 60c at the corner portion 70d so as to open outward in the radial direction by the elasticity of the cover member 70. As a result, the cover member 70 is elastically held by the housing 60 by being press-fitted into the housing 60.

The housing 60 and the cover member 70 shown in FIG. 6 are formed by pressing a flat metal material. The housing 60 is formed by processing a flat plate-like material that is thicker than the cover member 70. Therefore, the surface portion 60b of the housing 60 is provided thicker than the surface portion 70b of the cover member 70. In particular, the surface portion 60b forming the inner wall 60c is thicker than the surface portion 70b forming the outer peripheral end portion 70c. That is, the housing 60 has a higher rigidity than the cover member 70. Therefore, the housing 60 can hold the cover member 70 by receiving the elastic force of the outer peripheral end portion 70c of the cover member 70 when the cover member 70 is press-fitted.

When the housing 60 and the cover member 70 are press-processed, the portion supported by the processing machine is generally not extended, but the portion extruded by the press processing is extended and the plate thickness is reduced. Therefore, the surface portions 60b and 70b of the housing 60 and the cover member 70 have substantially constant thicknesses on the same surface, but the surface portions 60b and 70b sandwiching the bent portions 60a and 70a are different in thickness from each other. The housing 60 is formed by, for example, the outer peripheral end portion provided with the flange portion 66 being supported by the processing machine, and the bottom portion being extruded by press working. As a result, the thickness of the housing 60 changes stepwise from the center to the outside. In the cover member 70, for example, the outer peripheral end portion 70c is supported by the processing machine and does not extend substantially. On the other hand, for example, the surface portion 70b of the central region of the cover member 70 is extruded and extends along the press-fitting direction. As a result, the thickness of the cover member 70 changes stepwise from the center to the outside.

As shown in FIG. 4, the passage forming portion 28 has a fitting recess 80 into which the housing 60 can be inserted, and the fitting recess 80 opens toward the downstream side of the tributary passage 42 (see FIG. 3). At the downstream end of the passage forming portion 28, a flat collar receiving surface 82 and a support piece 84 cantilevered and supported by the passage forming portion 28 are provided. The collar receiving surface 82 is provided on the peripheral edge of the opening of the fitting recess 80. The support piece 84 extends substantially parallel to the collar receiving surface 82 and has flexibility along the peripheral edge of the opening of the fitting recess 80. At the tip of the support piece 84, a locking claw 84a (snap hook) protruding toward the collar receiving surface 82 is provided.

As shown in FIG. 3, the housing 60 is inserted into the fitting recess 80. An elastic О ring 74 is interposed between the housing 60 and the fitting recess 80. As a result, the gap between the housing 60 and the fitting recess 80 is sealed. When the housing 60 shown in FIG. 4 is attached to the fitting recess 80, first, the flange portion 66 protruding in the radial direction from the housing 60 is brought into contact with the flange portion receiving surface 82. The housing 60 is rotated with respect to the fitting recess 80. While bending the support piece 84, the collar portion 66 is made to enter between the collar portion receiving surface 82 and the support piece 84. The collar portion 66 is held by the locking claw 84a, the collar portion receiving surface 82, and the support piece 84 as the bending of the support piece 84 returns. As a result, the housing 60 is held in the fitting recess 80.

As shown in FIG. 3, the tributary passage 42 is formed in the passage forming portion 28 on the upstream side of the fitting recess 80. The downstream end of the tributary passage 42 has a diameter slightly larger than the inflow port 64 of the housing 60. This prevents the ball 54 from hitting the downstream end of the tributary passage 42 when pressed against the valve seat 62. Therefore, the ball 54 pressed toward the valve seat 62 can surely close the inflow port 64. The tributary passage 42 has a throttle portion 42a (orifice) having a diameter smaller than that of the inflow port 64 of the housing 60. The throttle portion 42a regulates the flow rate of fuel flowing through the tributary passage 42. As a result, the pulsation of the fuel can be suppressed, and the ball 54 can stably open and close the inflow port 64.

[Operation of pump module]
When the fuel pump 16 is operated when the pump module 12 shown in FIG. 1 is used, clean fuel filtered by the fuel filter 20 is sucked into the fuel pump 16 from the fuel tank 10. The fuel is boosted by the fuel pump 16 and then discharged from the discharge port into the fuel passage 30 of the set plate 14. The fuel in the fuel passage 30 is adjusted to a predetermined pressure by the pressure adjusting device 50, and is sent out to the engine through the fuel supply pipe connected to the fuel discharge pipe 32.

As described above, the pressure adjusting device 50 includes a housing 60 having a valve seat 62 and an inflow port 64, a ball 54 that opens and closes the inflow port 64 in cooperation with the valve seat 62, and a ball 54, as shown in FIG. A coil spring 56 for urging the valve seat 62 and a cover member 70 for holding the coil spring 56 in the housing 60 are provided. The housing 60 and the cover member 70 are composed of face portions 60b, 70b extending linearly in at least one direction, and bent portions 60a, 70a bent at the ends of the face portions 60b, 70b. The thicknesses of the face portions 60b and 70b gradually change from the center of the housing 60 and the cover member 70 to the outside.

Therefore, the face portions 60b and 70b and the bent portions 60a and 70a can be formed by bending a flat plate-like material. Therefore, the housing 60 and the cover member 70 can be easily mass-produced, and the manufacturing cost can be reduced. Further, since the cover member 70 is composed of the surface portion 70b and the bent portion 70a, the cover member 70 has high elasticity. Therefore, the press-fitting load for press-fitting the cover member 70 into the housing 60 can be reduced. Therefore, when the cover member 70 is assembled to the housing 60, it can be assembled with simple equipment, and the workability is good. Further, the housing 60 and the cover member 70 do not require high rigidity. Therefore, the weight of the housing 60 and the cover member 70 can be reduced.

As shown in FIG. 6, the surface portion 70b located at the outermost peripheral end portion 70c on the outermost peripheral side of the cover member 70 is inclined so as to open outward in the radial direction. Therefore, the surface portion 70b of the outer peripheral end portion 70c is elastically pressed against the inner wall 60c of the housing 60 while being inclined so as to open outward in the radial direction of the cover member 70. Therefore, the cover member 70 can be held in the housing 60 by utilizing the elasticity of the cover member 70. Moreover, since the elasticity of the cover member 70 is utilized, the cover member 70 can be held in the housing 60 even when it is difficult to secure the rigidity of the housing 60, for example. Further, the surface portion 70b of the outer peripheral end portion 70c is elastically pushed inward in the radial direction by the inner wall 60c of the housing 60 when it is press-fitted into the housing 60. Therefore, the cover member 70 is press-fitted into the housing 60 with its outer diameter small. As a result, the cover member 70 can be easily press-fitted into the housing 60.

As shown in FIG. 6, the outer peripheral end portion 70c is arranged so as to extend outward from the inside of the housing 60. Therefore, the outer peripheral end portion 70c extends toward the rear side (upper side in the drawing) in the press-fitting direction when the cover member 70 is press-fitted into the housing 60. Therefore, the outer peripheral end portion 70c is prevented from being caught on the inner wall 60c of the housing 60. Thus, the press-fitting load for press-fitting the cover member 70 into the housing 60 can be reduced. Further, when the cover member 70 is held in the housing 60, the outer peripheral end portion 70c is likely to be caught by the inner wall 60c of the housing 60 in the pulling direction. Thus, the cover member 70 can be made difficult to come out of the housing 60.

As shown in FIG. 6, the corner portion 70d of the outer peripheral end portion 70c is in contact with the inner wall 60c of the housing 60. Therefore, the corner portion 70d of the outer peripheral end portion 70c is pressed against the inner wall 60c of the housing 60 by the elasticity of the cover member 70. That is, the outer peripheral end portion 70c is arranged in the housing 60 so as to be inclined so as to extend in the extending direction with respect to the inner wall 60c of the housing 60. As a result, the holding property of holding the cover member 70 in the housing 60 is improved.

As shown in FIG. 6, the surface portion 60b of the housing 60 is thicker than the surface portion 70b of the cover member 70. Therefore, the rigidity of the housing 60 is higher than the rigidity of the cover member 70. As a result, it is possible to prevent the housing 60 from being deformed by the press-fitted cover member 70.

The housing 60 and the cover member 70 shown in FIG. 6 are formed by press working. Therefore, the housing 60 and the cover member 70 can be easily mass-produced. Further, the processing cost of the housing 60 and the cover member 70 can be reduced.

As shown in FIG. 3, the pressure adjusting device 50 includes a throttle portion 42a formed in the passage forming portion 28 on the upstream side of the housing 60. Therefore, the housing 60 and the throttle portion 42a can be formed separately. In order to form the small-diameter drawing portion 42a, machining with high machining accuracy such as cylindrical cutting is required. By forming the housing 60 separately from the drawing portion 42a, the housing 60 can be formed without requiring high processing accuracy. As a result, the processing cost of the housing 60 can be reduced.

Although the specific embodiment has been described above, the technique disclosed in the present application can also be implemented in the form in which various other modifications are made. In the embodiment, the housing 60 and the cover member 70 formed by press working are exemplified. Instead of this, for example, the housing 60 and the cover member 70 may be formed by using both bending and cutting. Further, the housing 60 and the cover member 70 formed by pressing the outer peripheral end portion to be supported by the processing machine are illustrated. Instead of this, for example, the central region may be supported by a processing machine, and the housing 60 and the cover member 70 formed by press working may be used. Further, the cover member 70 having a substantially W-shaped cross section along the press-fitting direction was exemplified. Instead of this, for example, the cover member 70 may have an outer peripheral end portion 70c extending outward from the inside of the housing 60 and having a substantially U-shaped cross section along the press-fitting direction.

10 ... Fuel tank 11 ... Opening 12 ... Pump module 14 ... Set plate 16 ... Fuel pump 18 ... Pump holding member 20 ... Fuel filter 22 ... Lid 24 ... Lid plate 26 ... Fitting wall 28 ... Passage forming part 30 ... Fuel Passage 32 ... Fuel discharge pipe 34 ... Pump fitting part 36 ... Electric connector 38 ... Lead wire 40 ... Connection pipe 42 ... Tributary passage, 42a ... Squeezing part 50 ... Pressure adjusting device 52 ... Pressure adjusting valve 54 ... Ball (valve body)
56 ... Coil spring (urging member)
58 ... pressing member, 58a ... recess 60 ... housing, 60a ... bent part, 60b ... surface part, 60c ... inner wall 62 ... valve seat 64 ... inflow port (opening)
66 ... Flange 70 ... Cover member 70a ... Bending, 70b ... Surface, 70c ... Outer peripheral end, 70d ... Corner 72 ... Discharge port 74 ... О Ring 80 ... Fitting recess 82 ... Collar receiving surface 84 ... Support piece , 84a ... Locking claw 90 ... Pressure adjusting device 92 ... Pressure adjusting valve 94 ... Housing, 94a ... Fitting recess 96 ... Valve seat 98 ... Inflow port 100 ... Tributary passage, 100a ... Squeezing part 102 ... Cover member 104 ... Discharge port

Claims (7)

It is a pressure regulator
A housing with a valve seat and an opening,
A valve body that opens and closes the opening in cooperation with the valve seat,
An urging member that urges the valve body toward the valve seat, and
A cover member that holds the urging member in the housing is provided.
The housing and the cover member are composed of a surface portion extending linearly in at least one direction and a bent portion bent at an end portion of the surface portion.
The surface portion is a pressure adjusting device whose thickness gradually changes from the center of the housing and the cover member to the outside. The pressure adjusting device according to claim 1.
A pressure adjusting device in which the surface portion located at the outermost peripheral end portion on the outermost peripheral side of the cover member is inclined so as to open outward in the radial direction. The pressure adjusting device according to claim 2.
The outer peripheral end portion is a pressure adjusting device arranged so as to extend from the inside to the outside of the housing. The pressure adjusting device according to claim 2 or 3.
A pressure adjusting device in which the corner portion of the outer peripheral end portion is in contact with the inner wall of the housing. The pressure adjusting device according to any one of claims 1 to 4.
The surface portion of the housing is a pressure adjusting device thicker than the surface portion of the cover member. The pressure adjusting device according to any one of claims 1 to 5.
The housing and the cover member are pressure adjusting devices formed by press working. The pressure adjusting device according to any one of claims 1 to 6.
A pressure regulator having a throttle portion formed on the upstream side of the housing.

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