JP2009097388A - Fuel supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel supply device capable of improving effect suppressing noise from a fuel tank due to operation of a fuel pump. <P>SOLUTION: The fuel supply device 10 includes a fuel pump 41, and a filter case 90 storing the fuel pump 41 and storing a filter element 82. The filter case 90 includes an inner tube part 92 covering the fuel pump 41. A projection part 94 pressing a side surface 73 of a housing 71 of the fuel pump 41 in a radial direction is formed on an inner wall 93 of the inner tube part 92. Consequently, the fuel pump 41 is firmly fixed on the filter case 90, and rigidity of the fuel pump 41 is increased as weight of the fuel pump is increased. Consequently, vibration of the fuel pump 41 itself is suppressed and is prevented from being radiated from the fuel tank 130 as noise. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fuel supply apparatus.

  There is known a fuel supply device that includes a fuel pump and a housing case that is housed in a fuel tank and houses a functional part related to fuel pumping, and has a housing portion that houses a fuel pump ( (See Patent Document 1 and Patent Document 2).

  The fuel supply device of Patent Document 1 has a vibration absorbing member such as rubber that absorbs vibration from the fuel pump on the outer wall of the housing case. Thereby, the vibration generated in the fuel pump is suppressed from being transmitted to the fuel tank, and the noise emitted from the fuel tank is suppressed.

In addition, the fuel supply device of Patent Document 2 has a sub tank that stores a storage case. The housing case and the sub tank are coupled by an elastic support arm (vibration absorbing member). Thereby, the vibration generated in the fuel pump is suppressed from being transmitted to the fuel tank, and the noise emitted from the fuel tank is suppressed.
JP 2000-234574 A JP 2004-190661 A

  Although the fuel supply devices described in Patent Documents 1 and 2 have a vibration absorbing member made of rubber or an elastic support arm and suppress the transmission of vibration to the fuel tank, the fuel pump itself is It is vibrating. Therefore, the vibration of the fuel pump is transmitted to the fuel tank via the fuel that is in contact with the fuel pump and the surrounding members that are in contact with the fuel, and may be emitted as noise from the fuel tank. Further, there is a problem in that the vibration of the fuel pump is converted into sound and discharged outside the fuel tank from the fuel pump to the vibration absorbing member.

  The objective of this invention is providing the fuel supply apparatus which can improve the noise suppression effect from a fuel tank by a fuel pump operating.

  The invention according to claim 1 is a fuel pump that pumps fuel in a fuel tank, and a housing case that is housed in the fuel tank and houses functional components related to fuel pumping, and a housing portion that houses the fuel pump. A fuel supply device including a housing case, wherein the fuel pump is fixed to the housing case by pressing the side surface of the fuel pump in a radial direction between the housing portion and the side surface of the fuel pump. A member is provided.

  According to this configuration, since the fixing member that presses the side surface of the fuel pump in the radial direction is provided in the storage portion, the fuel pump is firmly fixed to the storage case. As a result, the weight of at least the housing case and functional parts related to the fuel pumping is added to the fuel pump, and the rigidity of the fuel pump is increased. As a result, the vibration of the fuel pump itself can be suppressed, and the noise emitted from the fuel tank can be reduced as compared with the conventional one that absorbs the vibration using elasticity such as rubber.

  The invention described in claim 2 is characterized in that the fixing member presses a central portion of the side surface of the fuel pump. The fuel pump is generally formed long in the axial direction. For this reason, the strength of the central portion of the side surface of the fuel pump is relatively weak compared to other portions (both end portions). According to this configuration, the rigidity can be most effectively increased by pressing the central portion having a relatively low strength in the side surface of the fuel pump with the fixing member. As a result, the vibration suppression effect of the fuel pump can be improved.

  The invention described in claim 3 is a convex portion that protrudes from the inner wall of the housing portion toward the fuel pump, and is formed integrally with the inner wall. According to this configuration, the fixing member can be provided in the housing portion with a simple configuration and without increasing the number of parts.

  According to a fourth aspect of the present invention, the accommodating portion of the accommodating case is formed in a cylindrical shape having both ends open, and the fixing member supports one end of the fuel pump and one of the accommodating portions. It is formed in the bracket which covers the opening part of this, It is a wedge part which can be inserted between the side surface of a fuel pump, and the inner wall of a accommodating part, It is characterized by the above-mentioned.

  According to this configuration, the position in the housing portion of the fuel pump is first determined, and then the bracket is opened so that the wedge portion as a fixing member is inserted into the gap between the side surface of the fuel pump and the inner wall of the housing portion from the opening side. By attaching to the part, the fuel pump can be firmly fixed to the housing case at the wedge part.

  According to this, for example, when it is necessary to determine the circumferential position of the fuel pump in the housing portion, the fuel pump can be firmly fixed to the housing case after the circumferential position in the housing portion of the fuel pump is determined. That is, the circumferential position in the fuel pump housing portion can be easily determined.

  If the fuel pump is accommodated in the accommodating portion formed in a cylindrical shape and the entire side surface of the fuel pump is compressed by the fixing member, the accommodating portion is divided into two regions by the fixing member. When the housing case is housed in the fuel tank so that the central axis of the tubular housing portion faces the vertical direction of the fuel tank, the moisture contained in the fuel tends to accumulate in the region formed above the fixing member. End up.

  On the other hand, in the invention according to claim 5, the accommodating portion of the accommodating case is formed in a cylindrical shape having both ends open, and the accommodating case has one opening of the accommodating portion as the other opening. It is accommodated in the fuel tank so as to be positioned on the bottom side of the fuel tank, and a passage connecting one opening and the other opening of the fixing member is formed in the housing. .

  According to this structure, the water | moisture content collected in the area | region formed above the accommodating part can be easily discharged | emitted to the lower area | region side through a channel | path by the effect | action of gravity. Thereby, it is possible to avoid a state in which moisture is always accumulated in one region.

  According to a sixth aspect of the present invention, the fuel pump includes a pump unit and an electric motor unit that drives the pump unit, and the electric motor unit is connected to an end portion opposite to the pump unit from the outside. The electric motor unit is characterized in that the electric motor unit is housed in the housing unit such that the power feeding unit is positioned on the other opening side of the housing unit.

  According to this configuration, moisture can be discharged from one opening through the passage even when the power feeding unit of the electric motor unit is disposed on the other opening side of the housing. It is possible to suppress the accumulation of moisture. For this reason, generation | occurrence | production of abnormality (corrosion etc.) of a power feeding part by a power feeding part touching a water | moisture content can be suppressed.

  The invention according to claim 7 is characterized in that the functional component is a filter element for filtering the fuel discharged from the fuel pump. According to this configuration, when the filter element contains fuel, its weight increases. For this reason, the vibration suppression effect of the fuel pump can be further enhanced.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
A fuel supply apparatus according to a first embodiment of the present invention is shown in FIG. The fuel supply device 10 is an in-tank type fuel supply device accommodated in a fuel tank 130 such as a two-wheel or four-wheel vehicle.

  The fuel supply device 10 includes a lid member 20, a sub tank 30, a pump unit 40, and the like, and is accommodated in a fuel tank 130.

  The lid member 20 is formed in a disk shape with resin, and is attached so as to close an opening formed in the upper wall of the resin fuel tank 130. The fuel tank 130 may be made of metal.

  In the lid member 20, a fuel discharge pipe 21 and an electrical connector 22 are integrally molded with resin. The fuel discharge pipe 21 is a pipe that supplies the fuel discharged from the pump unit 40 accommodated in the sub tank 30 to the internal combustion engine outside the fuel tank 130. The electrical connector 22 supplies power to the pump unit 40 through a lead wire indicated by a one-dot chain line.

  The end of the shaft 23 is press-fitted into the surface of the lid member 20 facing the bottom of the fuel tank 130 so as to extend toward the bottom.

  The sub tank 30 is formed of a resin in a bottomed cylindrical shape, and is disposed directly below the lid member 20. The sub tank 30 stores the pump unit 40 and accumulates a part of the fuel in the fuel tank 130. An insertion portion 32 for loosely inserting the end portion of the shaft 23 is provided inside the side wall 31 of the sub tank 30. A spring 24 is provided between the lid member 20 and the insertion portion 32 of the sub tank 30. The spring 24 urges the lid member 20 and the sub tank 30 to be separated from each other. Therefore, even if the resin fuel tank 130 expands and contracts due to a change in internal pressure or a change in the amount of fuel due to a temperature change, the bottom of the sub tank 30 is always pressed against the bottom of the fuel tank 130 by the urging force of the spring 24.

  The pump unit 40 includes a fuel pump 41, a suction filter 81, a filter element 82, and the like. Except for the suction filter 81, the filter case 90 is accommodated. The filter case 90 corresponds to the housing case described in the claims.

  The fuel pump 41 includes a pump unit 42 and an electric motor unit 51 that drives the pump unit 42. The fuel pump 41 is accommodated in the sub tank 30 such that the pump part 42 is disposed on the bottom side of the sub tank 30 with respect to the electric motor part 51. The housing 71 is formed of a metal in a substantially cylindrical shape, and also serves as a housing for the pump unit 42 and the electric motor unit 51. A pump cover 43 is caulked and fixed to one end of the housing 71, and an end cover 52 is caulked and fixed to the other end. As the housing 71 caulks the pump cover 43, the pump case 44 is sandwiched between the pump cover 43 and the stepped portion 72.

  The pump unit 42 is a turbine pump having a pump cover 43, a pump case 44 and an impeller 45. The pump cover 43 and the pump case 44 accommodate the impeller 45 rotatably. The pump cover 43 is formed with a suction port 47 for sucking fuel into the pump passage 46. A suction filter 81 is provided on the upstream side of the suction port 47. The pump passage 46 is formed in a C shape between the pump cover 43 and the impeller 45 and between the pump case 44 and the impeller 45.

  A plurality of blade grooves are formed in the rotation direction on the outer peripheral edge of the impeller 45. When the impeller 45 rotates together with the shaft 66 by the rotation of the armature 62, the fuel flows out from the blade groove at the front in the rotation direction toward the blade groove at the rear in the rotation direction, and the fuel is turned into a swirl flow, so that the fuel becomes a swirling flow. The pressure is increased in the passage 46.

  The fuel sucked from the suction port 47 by the rotation of the impeller 45 is boosted in the pump passage 46 by the rotation of the impeller 45 and is pumped from the discharge port (not shown) provided in the pump case 44 to the electric motor unit 51 side.

  The electric motor unit 51 is a DC motor with a brush, and includes a permanent magnet 61, an armature 62, and the like. The permanent magnet 61 is a ferrite magnet, for example, and is formed in an arc shape. Two permanent magnets 61 are attached to the inner peripheral wall of the housing 71 in the circumferential direction.

  The armature 62 is disposed on the inner peripheral side of the permanent magnet 61. A gap through which fuel can flow is formed between the armature 62 and the permanent magnet 61. The armature 62 includes a laminated core 63, a coil 64, a commutator 65, a shaft 66, and the like. The laminated core 63 is formed by laminating plate-like magnetic materials in the direction of the rotation axis of the armature 62. A plurality of slots are formed in the laminated core 63, and a coil 64 is wound around the slots. A shaft 66 is press-fitted into the rotation center of the laminated core 63. An end portion of the shaft 66 on the pump portion 42 side is accommodated in the pump case 44 and the pump cover 43, and an impeller 45 is rotatably attached to the end portion together with the shaft 66. The end portion of the shaft 66 on the pump portion 42 side is supported by a bearing 48 provided in the pump case 44.

  A commutator 65 is provided at the end of the laminated core 63 on the end cover 52 side. The commutator 65 is formed in a disc shape and is electrically connected to the coil 64. A brush (not shown) is further provided on the end cover 52 side of the commutator 65.

  The end cover 52 is provided with a bearing 53 for bearing the end portion of the shaft 66 on the end cover 52 side. A connector 54 is formed on the end cover 52. A terminal 55 is provided inside the connector 54. The terminal 55 corresponds to a power feeding unit described in the claims.

  One end of the terminal 55 is electrically connected to the brush, and the other end is electrically connected to the electrical connector 22 via a lead wire (dashed line). When power is supplied to the terminal 55, power is supplied to the coil 64 via the brush and commutator 65, and the armature 62 is rotationally driven. The electric motor unit 51 may be a brushless motor instead of a brushed DC motor.

  In addition to the connector 54, the end cover 52 is formed with a discharge port 56 that discharges the fuel discharged from the pump unit 42 to the outside of the fuel pump 41. A check valve 57 is provided inside the discharge port 56. The check valve 57 prevents fuel from flowing back from the outside of the discharge port 56 into the fuel pump 41.

  When electric power is supplied to the coil 64 and the armature 62 rotates, the impeller 45 also rotates together with the armature 62. Then, the fuel in the fuel tank 130 is sucked into the pump passage 46 via the suction port 47. The fuel flowing into the pump passage 46 is boosted by receiving kinetic energy by the rotation of the impeller 45 and discharged from a discharge port (not shown) to the fuel chamber 74 of the electric motor unit 51. The fuel discharged into the fuel chamber 74 is discharged from the discharge port 56 to the outside of the fuel pump 41 via a gap between the permanent magnet 61 and the armature 62.

  Here, when the armature 62 rotates, the fuel pump 41 vibrates. This vibration includes vibrations in the rotation axis direction, radial direction, and circumferential direction of the fuel pump 41. The cause of the vibration generated when the fuel pump 41 is driven is mainly the weight balance of the armature 62, the cogging torque, and the armature 62 generated when the commutator 65 switches the direction of the current flowing through the coil 64. The torque fluctuation is considered. In particular, the circumferential vibration is larger than the other vibrations (rotation axis direction, radial vibration).

  The filter case 90 is formed in a substantially cylindrical shape with resin, and houses the fuel pump 41 and the filter element 82. The filter case 90 includes a case body 91 and a lid 110.

  The case main body 91 has an inner cylinder part 92, an outer cylinder part 100, and a bottom part 101. The inner cylinder part 92 covers the side surface 73 of the housing 71 of the fuel pump 41 over the entire circumference. The side surface 73 corresponds to the side surface of the fuel pump described in the claims, and the inner cylinder portion 92 corresponds to the accommodating portion described in the claims.

  The outer cylinder part 100 covers the entire circumference of the inner cylinder part 92 at a predetermined interval on the outer periphery side of the inner cylinder part 92. The bottom part 101 connects the lower part of the inner cylinder part 92 and the outer cylinder part 100. Thereby, an annular space is formed in the inner cylinder portion 92, the outer cylinder portion 100 and the bottom portion 101.

  A filter element 82 is accommodated in this space. The filter element 82 is composed of a nonwoven fabric, filter paper, or the like, and removes foreign matters contained in the fuel discharged from the fuel pump 41.

  Although not shown in FIG. 1, a pressure regulator that adjusts the pressure of the fuel that has passed through the filter element 82 is provided on the outer wall of the outer cylinder portion 100. The pressure regulator is connected to the fuel discharge pipe 21 via a hose (indicated by a two-dot chain line).

  A part of the fuel discharged from the pressure regulator is supplied to a jet pump (not shown) provided in the sub tank 30. The jet pump includes an inflow portion (not shown) provided in the sub tank 30, a nozzle portion that ejects fuel toward the inflow portion, and a check valve that prevents a back flow of fuel from the inflow portion to the outside of the sub tank 30. The fuel in the fuel tank 130 is drawn into the sub tank 30 through the inflow portion by the suction force generated by the fuel being ejected from the nozzle portion.

  A fuel inflow portion 98 connected to the discharge port 56 of the fuel pump 41 is formed in the upper portion of the inner wall 93 of the inner cylinder portion 92. The discharge port 56 is connected so as to be inserted into the fuel inflow portion 98. The discharge port 56 is inserted into the fuel inflow portion 98 by inserting the fuel pump 41 through the opening 97 on the lower side of the inner cylinder portion 92 with the discharge port 56 facing upward. A space between the outer wall of the discharge port 56 and the inner wall of the fuel inflow portion 98 is sealed with an O-ring 99. The opening 97 corresponds to one opening described in the claims.

  The lid 110 is formed in a substantially annular shape, covers the upper space between the inner cylinder part 92 and the outer cylinder part 100, and seals the upper part of the case main body 91. The inner peripheral side of the lid 110 also covers the upper part of the fuel inflow portion 98. Since the inner cylinder part 92 on the side where the fuel inflow part 98 is formed is formed lower than the outer cylinder part 100, a gap is formed between the inner cylinder part 92 and the lid 110. The fuel that has flowed into the fuel inflow portion 98 flows into the filter element 82 through this gap. The lid 110 has an opening 111 into which a lead wire or the like for supplying electric power from the outside to the terminal 55 of the fuel pump 41 can be inserted with the lid 110 attached to the case main body 91. The opening 111 corresponds to the other opening described in the claims.

  The inner wall 93 of the inner cylindrical portion 92 is formed with a convex portion 94 as a fixing member according to the claims that protrudes from the inner wall 93 toward the housing 71 of the fuel pump 41. As shown in FIG. 2, a plurality of the convex portions 94 are formed. In the present embodiment, four convex portions 94 are formed. The convex portion 94 is formed integrally with the inner cylinder portion 92. The convex portions 94 are arranged symmetrically with the central axis of the inner cylindrical portion 92 as the symmetry axis. The intervals between the convex portions 94 are substantially equal. Moreover, the circumferential direction length of each convex part 94 is substantially the same length.

  Moreover, the axial direction length of each convex part 94 is a predetermined length. The lengths of the projections 94 in the axial direction are substantially the same.

  The distance from the predetermined convex portion 94 to the other convex portion 94 facing each other is shorter than the outer diameter of the housing 71 of the fuel pump 41. For this reason, when the fuel pump 41 is accommodated on the inner peripheral side of the inner cylindrical portion 92, the fuel pump 41 is inserted into the inner cylindrical portion 92 so that the convex portion 94 is pushed outward by the side surface 73 of the housing 71. That is, the fuel pump 41 is press-fitted into the inner cylinder portion 92.

  Thereby, the side surface 73 of the housing 71 of the fuel pump 41 is pressed by the convex portion 94. As a result, the fuel pump 41 is firmly fixed to the filter case 90. Further, the convex portion 94 is provided at a position where the central portion of the housing 71 of the fuel pump 41 is pressed when the fuel pump 41 is press-fitted into the inner cylinder portion 92. Between the predetermined convex portion 94 and another adjacent convex portion 94, a passage 95 is formed that communicates the upper side and the lower side of the inner cylinder portion 92.

  The inner cylinder portion 92 is formed longer than the outer cylinder portion 100. A bracket 120 that covers the pump part 42 of the fuel pump 41 from below is provided at the lower end of the inner cylinder part 92 in a state where the fuel pump 41 is accommodated in the inner cylinder part 92.

  The bracket 120 is formed in a container shape whose upper side is opened by resin. An engagement hole 122 that engages with a claw portion 96 formed on the outer peripheral side of the inner cylinder portion 92 is formed in the side wall 121 of the bracket 120. The claw portion 96 has a structure in which the bracket 120 does not drop downward by coming into contact with the inner wall of the engagement hole 122.

  The bottom of the bracket 120 supports the pump cover 43 of the fuel pump 41 from below. A joint portion 123 is formed at the bottom. The joint portion 123 connects the suction filter 81 and the suction port 47 formed in the pump cover 43.

  Next, the characteristic part of this embodiment is demonstrated in detail.

  In the present embodiment, the fuel pump 41 is press-fitted into the inner cylindrical portion 92, and the fuel pump 41 is firmly fixed to the filter case 90. In this way, by firmly fixing the fuel pump 41 to the filter case 90, the weight of the fuel pump 41 is the filter case 90 or a functional component related to fuel pumping attached to the filter case 90 when viewed from the fuel pump 41. The weight of (filter element 82, pressure regulator) increases. As for the filter element 82, the weight of the fuel is increased more than the dry weight of the filter element 82 by including the fuel.

  Moreover, since the convex part 94 presses the side surface 73 of the housing 71, the rigidity of the housing 71 having a relatively thin structure is enhanced.

  According to this, as described above, vibration energy generated in the fuel pump 41 when the fuel pump 41 is driven (circumferential direction, rotation axis direction, radial direction) is used to increase the weight of the fuel pump 41 and the housing 71. It can be absorbed by increasing the rigidity and vibration itself can be suppressed. As a result, it is possible to suppress the vibration generated from the fuel pump 41 from being transmitted to the fuel tank 130 via the filter case 90, the suction filter 81, the sub tank 30, and the like. As a result, it can suppress that the vibration becomes noise and is discharged | emitted from the fuel tank 130. FIG.

  Further, since the convex portion 94 is provided at a position that presses the central portion of the housing 71 when the fuel pump 41 is press-fitted into the inner cylindrical portion 92, the convex portion 94 presses the central portion that is relatively weak in the housing 71. The rigidity of the housing 71 can be effectively increased. Thereby, the vibration suppression effect of the fuel pump 41 can be improved.

  Further, the longer the circumferential length and the axial length of the convex portion 94, the larger the contact area with the side surface 73 of the housing 71. Therefore, the fuel pump 41 can be more firmly attached to the filter case 90. The vibration suppression effect of the fuel pump 41 can be improved.

  However, the longer the circumferential direction and the axial direction length of the convex portion 94, the more difficult it is to press-fit the fuel pump 41 into the inner cylindrical portion 92, and the assemblability of the fuel supply device 10 deteriorates. The size of the portion 94 is preferably determined in consideration of assembly.

  Further, the longer the circumferential length of the convex portion 94, the smaller the passage sectional area of the passage 95. Therefore, it is desirable to determine the circumferential length of the convex portion 94 in consideration of this point.

  The sub tank 30 is filled with fuel by the above-described operation of the nozzle unit (not shown) as a jet pump and the configuration of a check valve that prevents the pumped fuel from flowing out of the sub tank 30. Even if the amount of fuel in the fuel tank 130 is small, most of the small amount of fuel is stored in the sub tank 30.

  Therefore, regardless of the amount of fuel in the fuel tank 130, the place where the electrical connection such as the terminal 55 is intended is submerged in the fuel. The fuel contains a slight amount of moisture. Since this water has a specific gravity greater than that of the fuel, the water tends to sink toward the bottom of the fuel tank 130.

  However, when the structure in which the fuel pump 41 is press-fitted into the inner cylindrical portion 92 as in the present embodiment is adopted, moisture tends to accumulate above the press-fitted portion, that is, in the region where the terminal 55 is formed.

  On the other hand, in this embodiment, since the passage 95 is formed between the convex portion 94 and the adjacent convex portion 94, the water accumulated above can be discharged below the convex portion 94 by its own weight. it can. Thereby, abnormality (corrosion etc.) resulting from the water | moisture content of connection parts, such as the terminal 55, can be suppressed.

(2nd Embodiment, 3rd Embodiment)
A second embodiment of the present invention is shown in FIG. 3, and a third embodiment is shown in FIG. Components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In the second embodiment shown in FIG. 3, only one convex portion 94 is formed on the inner wall 93 of the inner cylinder portion 92. In this case, when the fuel pump 41 is press-fitted into the inner cylindrical portion 92, the side surface 73 of the housing 71 of the fuel pump 41 is compressed by the convex portion 94 and a part of the inner wall 93 of the inner cylindrical portion 92 facing the convex portion 94. Is done. Also with this configuration, a passage 95 is formed between the convex portion 94 and a part of the inner wall 93 that contacts the side surface 73 of the housing 71. In this embodiment, a part of the inner wall 93 that contacts the convex portion 94 and the side surface 73 of the housing 71 corresponds to the fixing member described in the claims.

  In the third embodiment shown in FIG. 4, a concave groove 95 a is provided in the inner wall 93 of the inner cylinder portion 92. In this case, when the fuel pump 41 is press-fitted into the inner cylinder portion 92, a portion of the inner wall 93 of the inner cylinder portion 92 other than the concave groove 95 a comes into contact with the side surface 73 of the housing 71 and presses the side surface 73. In this case, the concave groove portion corresponds to the passage 95 in the first embodiment, and the other portion corresponds to the convex portion 94 that presses the side surface 73 of the housing 71 in the first embodiment. Equivalent to.

(Fourth embodiment)
A fourth embodiment of the present invention is shown in FIGS. Components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 5, the bracket 120 that supports the fuel pump 41 from below is provided on the inner peripheral side of the side wall 121 from the bottom toward the gap between the side surface 73 of the housing 71 of the fuel pump 41 and the inner wall 93 of the inner cylinder portion 92. A plurality of wedge portions 124 extending in the direction of the angle. As shown in FIG. 6, in this embodiment, four wedge parts 124 are formed. Further, the four wedge parts 124 are arranged symmetrically about the central axis of the inner cylinder part 92 when the bracket 120 is attached to the inner cylinder part 92. The intervals between the wedge portions 124 are substantially equal. Each wedge portion 124 has substantially the same circumferential length. In the present embodiment, the wedge portion 124 corresponds to the fixing member described in the claims.

  As shown in FIG. 5, the discharge port 56 of the fuel pump 41 is arranged so as to be shifted from the central axis of the fuel pump 41. In the fuel pump 41 having such a configuration, when the fuel pump 41 is press-fitted into the inner cylinder portion 92, the position of the fuel pump 41 in the rotational direction is set so that the discharge port 56 can be inserted into the fuel inflow portion 98. Must be specified.

  If the convex part 94 which presses the side surface 73 of the housing 71 is formed on the inner wall 93 of the inner cylindrical part 92 as in the first embodiment, the convex part 94 is formed before the discharge port 56 is inserted into the fuel inflow part 98. The side surface 73 of the housing 71 is pressed. This makes it difficult to rotate the fuel pump 41 to insert the discharge port 56 into the fuel inflow portion 98.

  In this embodiment, the discharge port 56 of the fuel pump 41 is inserted into the fuel inflow portion 98, the discharge port 56 is connected to the fuel inflow portion 98, the bracket 120 is attached to the inner cylinder portion 92, and the fuel pump 41 is connected to the filter case. Firmly fixed to 90.

  Specifically, when the bracket 120 is attached to the inner cylinder portion 92, the wedge portion 124 of the bracket 120 is inserted between the side surface 73 of the housing 71 and the inner wall 93 of the inner cylinder portion 92. Accordingly, the side surface 73 of the housing 71 can be pressed by the wedge portion 124, and the fuel pump 41 can be firmly fixed to the filter case 90. According to this, the discharge port 56 of the fuel pump 41 can be easily connected to the fuel inflow portion 98.

  In addition, the plate | board thickness is thin, so that the front-end | tip part of the wedge part 124 goes to a front-end | tip part. According to this, it becomes easy to insert the wedge part 124 between the side surface 73 of the housing 71 and the inner wall 93 of the inner cylinder part 92.

  Also in this embodiment, a gap for discharging moisture is formed between the wedge portion 124 and the adjacent wedge portion 124.

(Fifth embodiment)
A fifth embodiment of the present invention is shown in FIG. Components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The inner cylinder part 92 of the filter case 90 is formed in a substantially cylindrical shape. The outer cylinder portion 100 of the filter case 90 is formed in an arc shape. For this reason, an arc-shaped space is formed between the inner cylinder portion 92 and the outer cylinder portion 100. In this arc-shaped space, an arc-shaped filter element 82 adapted to the space is accommodated.

  Four convex portions 94 are formed on the inner wall 93 of the inner cylindrical portion 92. The convex portion 94 presses the side surface 73 of the housing 71 of the fuel pump 41 to firmly fix the fuel pump 41 to the filter case 90.

It is sectional drawing of the fuel supply apparatus by 1st Embodiment of this invention. It is the II-II sectional view taken on the line of FIG. It is principal part sectional drawing of the pump unit used for the fuel supply apparatus by 2nd Embodiment of this invention. It is principal part sectional drawing of the pump unit used for the fuel supply apparatus by 3rd Embodiment of this invention. It is sectional drawing of the pump unit used for the fuel supply apparatus by 4th Embodiment of this invention. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is principal part sectional drawing of the pump unit used for the fuel supply apparatus by 5th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Fuel supply apparatus, 20 Lid member, 30 Sub tank, 40 Pump unit, 41 Fuel pump, 42 Pump part, 43 Pump cover, 44 Pump case, 45 Impeller, 46 Pump passage, 47 Inlet, 51 Electric motor part, 52 End Cover, 54 Connector, 55 Terminal (power supply unit), 56 Discharge port, 61 Permanent magnet, 62 Armature, 66 Shaft, 71 Housing, 73 Side surface, 81 Suction filter, 82 Filter element, 90 Filter case (accommodating case), 91 Case body, 92 inner cylinder part, 93 inner wall, 94 convex part, 95 passage, 96 claw part, 97 opening part (one opening part), 98 fuel inflow part, 99 O-ring, 100 outer cylinder part, 101 bottom part, 110 Lid, 111 opening (the other opening), 120 brackets G, 121 side wall, 124 wedge, 130 fuel tank

Claims (7)

A fuel pump for pumping the fuel in the fuel tank;
A storage case that is stored in the fuel tank and that stores functional parts related to fuel pumping, the storage case having a storage portion that covers the entire side surface of the fuel pump. A feeding device,
A fixing member for fixing the fuel pump to the housing case by pressing the side surface of the fuel pump in a radial direction is provided between the housing portion and the side surface of the fuel pump. A fuel supply device.   The fuel supply device according to claim 1, wherein the fixing member presses a central portion of the side surface of the fuel pump.   3. The fuel supply according to claim 1, wherein the fixing member is a convex portion that protrudes from the inner wall of the housing portion toward the fuel pump, and is integrally formed on the inner wall. apparatus. The storage portion of the storage case is formed in a cylindrical shape having both ends open,
The fixing member is formed on a bracket that supports one end of the fuel pump and covers one opening of the housing, and is inserted between the side surface of the fuel pump and the inner wall of the housing. The fuel supply device according to claim 1, wherein the fuel supply device is a wedge portion. The storage portion of the storage case is formed in a cylindrical shape having both ends open,
The housing case is housed in the fuel tank such that one opening of the housing is located closer to the bottom of the fuel tank than the other opening,
The fuel supply according to any one of claims 1 to 4, wherein a passage connecting the one opening of the fixing member and the other opening is formed in the housing portion. apparatus. The fuel pump has a pump part and an electric motor part that drives the pump part,
The electric motor unit has a power feeding unit to which power from the outside is supplied to the end opposite to the pump unit,
The fuel supply device according to claim 5, wherein the electric motor unit is housed in the housing unit such that the power feeding unit is positioned on the other opening side of the housing unit.   The fuel supply device according to any one of claims 1 to 6, wherein the functional component is a filter element that filters fuel discharged from the fuel pump.

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