JP6723954B2 - Fuel pump - Google Patents

Description

The present specification relates to a fuel pump including a motor.

Patent Document 1 discloses a fuel pump including a circuit for driving a motor. In the fuel pump, the circuit is supported by a lid that closes an opening provided in a housing that houses the motor. The lid has a discharge pipe communicating with the inside of the housing. The circuit is fastened to the lid by a metal screw that passes through a through hole provided in the circuit. The screw extends through the lid to the motor. The screw head is in contact with the contacts on the circuit, and the tip of the screw is connected to the motor.

International Publication 2014-055160

The fuel pump expands due to swelling due to fuel, thermal expansion due to heat generation of the circuit, and the like. Since the material of each part constituting the fuel pump, such as the lid that supports the circuit and the screw that connects the circuit and the motor, is different, the degree of expansion of each part is different. As a result, due to the expansion of each part, an excessive load may act on the contact point between the screw and the circuit, or the screw and the contact point at the contact point may be separated from each other.

The present specification provides a technique for maintaining good contact between a contact of a drive circuit and a conductive member.

A fuel pump disclosed in the present specification has an opening, a housing containing a motor, a flange that closes the opening, and has a fuel pipe communicating with the inside of the housing, and a flange. And a drive circuit that is supported by the flange and that is supported by the flange at a position facing the conductive member and that has a contact that faces the terminal. The conductive member may be elastically deformed by being pressed by the contact.

In the above configuration, the conductive member supported by the flange is elastically deformed by being pressed by the contact of the drive circuit supported by the flange. When the flange is not expanded, the conductive member comes into contact with the contact due to the restoring force due to elastic deformation, and the contact between the conductive member and the contact is maintained. On the other hand, in a situation where each part expands due to the use of the fuel pump, the conductive member elastically deforms to maintain the contact between the conductive member and the contact. Therefore, good contact between the conductive member and the contact can be maintained.

The housing may have a pair of positioning walls facing each other with the drive circuit interposed therebetween. According to this structure, the drive circuit can be arranged at a predetermined position by inserting the drive circuit between the pair of positioning walls.

Portions of the contact and the conductive member that protrude from the flange may be covered with resin. According to this configuration, the contact and the protruding portion can be protected from electrolytic corrosion due to fuel.

The above resin may be deformed following the deformation of the conductive member. According to this structure, even when the contact and the protruding portion are covered with the resin, it is possible to prevent the elastic deformation of the conductive member from being hindered by the resin. Therefore, the contact between the conductive member and the contact can be appropriately maintained.

The drive circuit may be housed in a case made of ceramic, and the drive circuit may be supported by the flange by contacting the case with the flange. The case may be exposed to the outside of the fuel pump. According to this configuration, the case is exposed to the fuel outside the fuel pump, so that the heat generated from the drive circuit can be radiated to the fuel via the case. Thereby, cooling of the drive circuit can be promoted.

The conductive member may include a conductive elastic portion fixed to the contact, and a terminal portion supported by the flange and facing the contact with the elastic portion sandwiched therebetween. The elastic portion may be elastically deformed and arranged on the compression side between the contact and the terminal portion. According to this configuration, the contact between the conductive member and the contact can be maintained by the elastic portion that elastically deforms toward the compression side.

The conductive member may be provided with a protruding portion protruding from the flange and having a chevron portion protruding toward the contact at the tip. The chevron portion may be pressed against the contact so that the protruding portion elastically deforms in a direction away from the drive circuit. According to this structure, the elastic deformation of the protrusion allows the contact between the conductive member and the contact to be maintained.

The perspective view of the electric pump of 1st Example is shown. FIG. 2 shows a cross sectional view of the flange of the first embodiment on the plane II of FIG. 1. FIG. 3 is a vertical sectional view of the electric pump of the first embodiment taken along the line III-III of FIG. 2. The process of attaching the circuit package to the flange is shown. The cross-sectional view of the flange of 2nd Example is shown. The cross-sectional view of the flange of 3rd Example is shown. The cross-sectional view of the flange of 4th Example is shown. The cross-sectional view of the flange of 5th Example is shown. FIG. 9 is a vertical sectional view of the electric pump of the fifth embodiment taken along the line IX-IX in FIG. 8. The longitudinal cross-sectional view of the electric pump of 6th Example is shown. The longitudinal cross-sectional view of the electric pump of 7th Example is shown.

(First embodiment)
The fuel pump 10 of the first embodiment will be described with reference to FIGS. The plane II of FIG. 1 is a cross section passing through the protrusions 60a and 62a of the input terminals 60 and 62 described later. A line III-III in FIG. 2 shows a vertical cross section that passes through a protrusion 60 a and an input contact 90 described later. FIG. 2 is drawn in an enlarged scale as compared with the other drawings in consideration of viewability.

The fuel pump 10 is installed, for example, in a fuel tank of a two-wheeled vehicle and is used to supply the fuel in the fuel tank to the engine. As shown in FIG. 1, the fuel pump 10 includes a housing 20, a flange 40, two input terminals 60 and 62, three output terminals 64, 66 and 68, and a circuit package 80. The housing 20 houses a motor 24 (see FIG. 3). The motor 24 rotates an impeller (not shown) of the pump. The housing 20 has an opening 22 on its upper side. The opening 22 is closed by the flange 40. A seal member (not shown) seals between the inner peripheral surface of the opening 22 and the outer peripheral surface of the flange 40. It should be noted that the directions such as "up" and "down" used in the embodiments are used for convenience of description, and do not define the directions in which the vehicle is actually mounted. Further, in FIG. 1, illustration of a U-shaped member described later is omitted.

The flange 40 is a resin member. The flange 40 includes a flat plate portion 42, a discharge pipe 44, and a support portion 46. The flat plate portion 42 is inserted into the opening 22 of the housing 20 and closes the opening 22. The discharge pipe 44 vertically penetrates the flat plate portion 42. The upper end of the discharge pipe 44 is connected to a fuel pipe (not shown) connected to the engine. The lower end of the discharge pipe 44 is located inside the housing 20. Here, as shown in FIG. 3, a suction pipe 26 communicating with the inside of the housing 20 is provided below the housing 20. The fuel sucked from the suction pipe 26 is pressure-fed by the impeller of the pump rotated by the motor 24 and discharged from the discharge pipe 44. In addition, in FIG. 1, since the suction pipe 26 cannot be observed, its illustration is omitted.

The support portion 46 supports the circuit package 80. The support portion 46 is provided on the upper surface of the flat plate portion 42 adjacent to the discharge pipe 44. A recess 48 is provided on the side surface of the support portion 46 opposite to the discharge pipe 44 side. The recess 48 is open on the upper side and the side opposite to the discharge pipe 44 side. The circuit package 80 is inserted into the recess 48 from above. The circuit package 80 is supported by the support 46 by being inserted into the recess 48. Here, of the width of the circuit package in the horizontal direction orthogonal to the insertion direction in which the circuit package 80 is inserted into the recess 48, the pair of walls 48a and 48b facing each other in the longitudinal width direction are for positioning the circuit package 80. Function as a positioning wall. As a result, the circuit package 80 can be arranged at a predetermined position facing the five terminals 60 to 68.

The two input terminals 60 and 62 are connected to an external power source (not shown). Each of the input terminals 60 and 62 extends vertically, and the lower end thereof is embedded in the support portion 46 (that is, each of the input terminals 60 and 62 is supported by the support portion 46). The input terminals 60 and 62 are arranged to face each other with the recess 48 interposed therebetween. At the lower ends of the input terminals 60 and 62, projecting portions 60a and 62a that project from the side surface of the support portion 46 opposite to the discharge pipe 44 side are formed. As shown in FIG. 2, each of the protrusions 60 a and 62 a is bent toward the recess 48. The protrusions 60 a and 62 a face the circuit package 80 inserted in the recess 48.

The three output terminals 64, 66, 68 electrically connect the drive circuit 82 in the circuit package 80 and the motor 24. The output terminals 64, 66, 68 pass through the flat plate portion 42 in the vertical direction. The output terminals 64, 66, 68 are supported by the flat plate portion 42. The output terminals 64, 66, 68 are lined up with a space. The upper ends of the output terminals 64, 66, 68 face the bottom surface of the recess 48, and face the circuit package 80 inserted in the recess 48.

The circuit package 80 includes a drive circuit 82 and a case 84 that houses the drive circuit 82. The drive circuit 82 converts DC power supplied from an external power source into three-phase AC power suitable for driving the motor 24. The drive circuit 82 has six contacts. Two input contacts 90 and 92 are arranged on the upper side of the drive circuit 82 at positions facing the input terminals 60 and 62. The contact arranged between the input contacts 90 and 92 is a contact for inspection and is not used during normal use. The two input contacts 90 and 92 are electrically connected to the input terminals 60 and 62, and DC power is input. Further, three output contacts 94, 96, 98 are arranged below the drive circuit 82 at positions facing the output terminals 64, 66, 68. The three output contacts output three-phase AC power and are electrically connected to the three output terminals 64, 66, 68. As a result, the DC power is supplied to the drive circuit 82 via the two input terminals 60 and 62 and the input contacts 90 and 92, converted into three-phase AC power by the drive circuit 82, and then output to the three outputs. It is supplied to the motor 24 via contacts 94, 96, 98 and three output terminals 64, 66, 68.

The case 84 is made of ceramic. Ceramic is a material having excellent thermal conductivity, heat resistance, and fuel resistance. The fuel resistance means that the property is unlikely to change even after being in contact with the fuel for a long time. For example, the ceramic is alumina, silicon nitride, or the like. Five contacts 90, 92, 94, 96, 98 of the drive circuit 82 and contacts for inspection are exposed on a side surface of the case 84 opposite to the discharge pipe 44 side. The case 84 covers the entire area of the drive circuit 82 except the area where the five contacts 90, 92, 94, 96, 98 and the contact for inspection are exposed. The drive circuit 82 is supported by the support portion 46 by the case 84 coming into contact with the inner surface of the recess 48 of the support portion 46.

The case 84 is exposed from the recess 48 at the upper surface and the side surface opposite to the discharge pipe 44 side. That is, the case 84 is exposed to the outside of the fuel pump 10. As a result, the case 84 is exposed to the fuel in the fuel tank. The heat generated by the drive circuit 82 is transmitted to the fuel via the case 84. Cooling of the drive circuit 82 can be promoted. Further, the ceramic case 84 can protect the drive circuit 82 from corrosion due to fuel.

As shown in FIGS. 2 and 3, the five terminals 60 to 68 are connected to the five contacts through the five U-shaped members. The U-shaped member is a member formed by bending a plate made of a conductive material (for example, metal) into a U-shape. As shown in FIG. 2, two U-shaped members 70 and 72 are arranged between the two input terminals 60 and 62 and the two input contacts 90 and 92. A U-shaped member 76 is arranged between the output terminal 66 and the output contact 96 as shown in FIG. 2, and a U-shaped member is provided between the output terminal 64 and the output contact 94 as shown in FIG. The member 74 is arranged. 2 and 3, the U-shaped member arranged between the output terminal 68 and the output contact 98 cannot be observed. The reference numeral of the U-shaped member is omitted. Each U-shaped member is arranged so that the U-shaped opening is located on the upper side. In the modification, the direction of the U-shaped opening of the U-shaped member is not limited, and for example, at least a part of the U-shaped member may be arranged so that the U-shaped opening faces downward. , May be arranged to face the horizontal direction.

As shown in FIG. 4, the five U-shaped members are fixed to the five contacts of the drive circuit 82 by means of solder or the like. Each U-shaped member (eg, 70) is connected to the compression side between each conductive member (eg, 60) and each contact (eg, 90) when the circuit package 80 is inserted into the recess 48 of the flange 40. Elastically deformed. Due to the restoring force of the elastic deformation, each U-shaped member contacts each terminal, and the electrical connection between each terminal and each contact is maintained.

The effect of this embodiment will be described. The flange 40 expands due to swelling due to exposure to fuel, thermal expansion due to heat generation of the drive circuit 82, and the like. For example, the output terminals 64 to 68 supported by the flat plate portion 42 of the flange 40 follow the expansion of the flange 40 and move in a direction away from the output contacts. Each U-shaped member arranged between each output terminal and each output contact is deformed so as to recover from elastic deformation when the output terminals move in the direction in which they are separated, that is, to expand in the left-right direction in FIG. To do. Therefore, it is possible to maintain good contact between each U-shaped member and each output terminal without separating each U-shaped member and each output terminal. Further, the same effect can be obtained for each U-shaped member arranged between each input terminal and each input contact.

(Correspondence)
The discharge pipe 44 is an example of a “fuel pipe”. For example, the flange 40 may be provided with a suction pipe instead of the discharge pipe. The output terminal and the U-shaped member facing the output terminal are examples of the “conductive member”, and the output terminal and the U-shaped member are examples of the “terminal portion” and the “elastic portion”. Further, the input terminal and the U-shaped member facing the input terminal are also examples of the “conductive member”, and the input terminal and the U-shaped member are examples of the “terminal portion” and the “elastic portion”.

(Second embodiment)
Differences from the first embodiment will be described with reference to FIG. The same configurations as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted. The description is similarly omitted in the third to seventh embodiments described below. As shown in FIG. 5, in this embodiment, the shape of the flange 240 is different from that of the first embodiment, and specifically, the shape of the support portion 246 is different from the shape of the support portion 46 of the first embodiment. The support part 246 includes a housing part 248 into which the circuit package 80 is inserted. The housing portion 248 is a hole whose upper side is open. Of the four walls forming the housing portion 248, the pair of walls 248a and 248b facing each other across the longitudinal width of the circuit package 80 function as positioning walls for positioning the circuit package 80. The projecting portions 60a and 62a of the input terminals 60 and 62 project from the pair of walls 248a and 248b to the inside of the housing portion 248 and face the input contacts 90 and 92 of the circuit package 80. The circuit package 80 is arranged in the accommodating portion 248 on a side closer to the discharge pipe 44, and is arranged between the wall of the accommodating portion 248 near the discharge pipe 44 and the five terminals.

Further, in the present embodiment, the potting material 250 is filled between the housing portion 248 and the circuit package 80 after the circuit package 80 is inserted into the housing portion 248. The potting material 250 has a height that covers the input terminals 60 and 62, the U-shaped members 70 and 72, and the input contacts 90 and 92 arranged on the upper side, and is filled to a height lower than the upper surface of the circuit package 80. .. The potting material 250 covers the five contacts, the five U-shaped members, the two protruding portions of the input terminals, and the upper ends of the three output terminals, and does not cover the upper surface of the circuit package 80. Thereby, each contact, each U-shaped member, the protrusion of each input terminal, and the upper end of each output terminal can be protected from electrolytic corrosion due to fuel. Further, since the upper surface of the circuit package 80 is exposed to the outside of the fuel pump 10, the upper surface is exposed to the fuel and the cooling of the drive circuit 82 is promoted.

The potting material 250 is, for example, a resin such as fluororubber, fluorosilicone rubber, urethane, silicon, or epoxy. The potting material 250 is cured after being filled. The hardened potting material 250 deforms following the U-shaped member that elastically deforms due to the expansion of the flange 40. The potting material 250 is selected in consideration of the mechanical characteristics of the U-shaped member. For example, the elastic modulus of the potting material 250 after curing is smaller than the elastic modulus of the U-shaped member. Accordingly, even when the U-shaped member is covered with the potting material 250, the elastic deformation of the U-shaped member is prevented from being hindered by the potting material 250. Therefore, also in the present embodiment, as in the first embodiment, even if the flange 40 expands, it is possible to maintain good contact between each U-shaped member and each terminal.

(Third embodiment)
Differences from the first embodiment will be described with reference to FIG. As shown in FIG. 6, in this embodiment, the shape of the flange 340 is different from that of the first embodiment, and specifically, the shape of the support portion 346 is different from the shape of the support portion 46 of the first embodiment. Similar to the second embodiment, the supporting portion 346 includes the accommodating portion 348, and the accommodating portion 348 has a pair of walls 348a and 348b facing each other across the longitudinal width of the circuit package 80.

Further, in this embodiment, the shapes of the input terminals 360 and 362 are different from those in the first embodiment. Projecting portions 360a and 362a that project from the pair of walls 348a and 348b of the housing portion 348 are formed at the lower ends of the input terminals 360 and 362, respectively. Each of the protrusions 360a and 362a is disposed near the wall 348d on the side closer to the discharge pipe 44, of the pair of walls 348c and 348d facing each other across the width of the circuit package 80.

In this embodiment, the circuit package 80 is inserted into the housing portion 348 such that the side surface where the five contacts are exposed faces the discharge pipe 44 side. The circuit package 80 is arranged between the far side wall 348c of the housing portion 348 and the five terminals. As a result, the protrusions 360a and 362a face the input contacts 90 and 92 of the circuit package 80, and the output terminals face the output contacts.

Also in this embodiment, similarly to the second embodiment, after the circuit package 80 is inserted into the housing portion 348, the potting material 350 is filled between the housing portion 348 and the circuit package 80. Thereby, also in the present embodiment, the same effect as that of the second embodiment can be obtained.

(Fourth embodiment)
Differences from the first embodiment will be described with reference to FIG. 7. As shown in FIG. 7, in this embodiment, the shape of the flange 440 is different from that of the first embodiment, and specifically, the shape of the support portion 446 is different from the shape of the support portion 46 of the first embodiment. The support portion 446 is provided with the recess 448 as in the first embodiment. The recess 448 has a pair of walls 448a and 448b that face each other across the longitudinal width of the circuit package 80. Claws 448e and 448f for fixing the cover 452 that closes the recess 448 are provided on the outside of the walls 448a and 448b. The holes provided in the cover 452 are hooked on the claws 448e and 448f, so that the cover 452 is fixed to the support portion 446.

The cover 452 is a resin member. The cover 452 has a U-shaped cross section. Holes corresponding to the claws 448e and 448f are provided in a pair of walls of the cover 452 that face each other.

Further, in this embodiment, the shapes of the input terminals 460 and 462 are different from those in the first embodiment. Projecting portions 460a and 462a having the same shape as the third embodiment are formed at the lower ends of the input terminals 460 and 462. As shown in FIG. 7, each of the protrusions 460 a and 462 b faces the cover 452.

Further, as shown in FIG. 7, in this embodiment, the circuit package 80 faces the same direction as in the third embodiment. The circuit package 80 is accommodated in the recess 448 from the opening located on the side opposite to the discharge pipe 44 side of the recess 448, with the side surface where the five contacts are exposed facing the bottom surface of the recess 448. As a result, the five U-shaped members fixed to the five contacts come into contact with the five terminals. Then, after housing the circuit package 80 in the recess 448, the cover 452 is attached. The circuit package 80 is pressed by the cover 452, and each U-shaped member elastically deforms toward the compression side. As a result, also in this embodiment, the same configuration as that of the third embodiment can be obtained.

Also in this embodiment, after the circuit package 80 is inserted into the recess 448 and the cover 452 is attached, the potting material 450 is filled between the recess 448 and the circuit package 80. As a result, also in this embodiment, the same effect as that of the second and third embodiments can be obtained.

(Fifth embodiment)
Differences from the first embodiment will be described with reference to FIGS. 8 and 9. As shown in FIGS. 8 and 9, in this embodiment, the shapes of the two input terminals 560 and 562 and the three output terminals are different from those of the first embodiment. Of the three output terminals, two output terminals facing the two output contacts 94 and 96 are denoted by reference numerals 564 and 566, respectively, and reference numerals of the output terminals facing the output contact 98 are omitted. ing.

At the lower ends of the input terminals 560 and 562, similar to the input terminals 60 and 62 of the first embodiment, protrusions 560a and 562a that are bent toward the recess 48 are formed. Curved portions 560b and 562b are provided at the ends of the protruding portions 560a and 562a. The curved portions 560b and 562b are portions curved in a U shape so as to bulge toward the circuit package 80 side. The curved portions 560b and 562b face the input contacts 90 and 92. Before the circuit package 80 is inserted into the concave portion 48, the tops of the curved portions 560b and 562b are located inside the concave portion 48, and when the insertion of the circuit package 80 into the concave portion 48 is completed, the curved portion 560b, 562b is pressed by the input contacts 90 and 92. At this time, each of the protrusions 560 a and 562 a elastically deforms in the direction away from the circuit package 80 at the base of the support portion 46. Due to the restoring force of elastic deformation, each bending portion contacts each input contact, and the electrical connection between each input terminal and each input contact is maintained. In addition, a bent portion bent in a V shape so as to bulge toward the circuit package 80 side may be provided at an end portion of the protruding portions 560a and 562a, and a convex strip having a top portion located on the circuit package 80 side may be provided. May be provided. Generally, the “mountain portion” located at the end of each of the protrusions 560a and 562a may have a shape that is raised toward the circuit package 80 side rather than the protrusions 560a and 562a protruding from the flange 40.

Similar to the curved portions 560b and 562b of the input terminals 560 and 562, curved portions are provided on the upper ends of the three output terminals, respectively. Of the three output terminals, the output terminal 564 that contacts the output contact 94 will be described below as a representative with reference to FIG. 9. A curved portion 564b that bulges toward the circuit package 80 is provided on the upper end of the output terminal 564. The curved portion 564b faces the output contact 94. Before the circuit package 80 is inserted into the concave portion 48, the top of the curved portion 564b is located inside the concave portion 48, and when the insertion of the circuit package 80 into the concave portion 48 is completed, the curved portion 564b causes the output contact. Pressed by 94. At this time, the portion of the output terminal 564 projecting from the flat plate portion 42 is elastically deformed in the direction away from the circuit package 80 at the root of the flat plate portion 42. The restoring force of the elastic deformation maintains the electrical connection between the output terminal 564 and the output contact 94.

In this embodiment, the curved portion of the input terminal is bent around the axis in the vertical direction, and the curved portion of the output terminal is bent around the axis in the direction orthogonal to the vertical direction (that is, the horizontal direction). Has been. In a modification, an extension portion that extends vertically is provided at the tip of the protruding portion of the input terminal, and a curved portion may be provided at the lower end of the extension portion. Then, both the curved portion of the input terminal and the curved portion of the output terminal may be bent around the horizontal axis.

The effect of this embodiment will be described. For example, even if the output terminal 564 supported by the flat plate portion 42 moves in the direction away from the output contact 94 following the expansion of the flange 40, the portion of the output terminal 564 protruding from the flat plate portion 42 is elastic. Transform to restore from deformation. Therefore, the curved portion 564b and the output contact 94 are not separated from each other, and the contact between the curved portion 564b and the output contact 94 can be favorably maintained. Further, similar effects can be obtained for the input terminals 560 and 562 and the input contacts 90 and 92.

(Correspondence)
The protrusions 560a and 562a and the curved portions 560b and 562b are examples of the “protrusion” and the “mountain portion”, respectively. The portion of the output terminal 564 protruding from the flat plate portion 42 and the curved portion 564b are examples of the “protruding portion” and the “mountain portion”, respectively.

(Sixth embodiment)
Differences from the first embodiment will be described with reference to FIG. As shown in FIG. 10, in this embodiment, lever-shaped contact members 670 and 674 may be adopted instead of the U-shaped members 70 and 74 of the first embodiment. Before the circuit package 80 is inserted into the recess 48, the contact members 670 and 674 stand up higher than the height shown in FIG. When the circuit package 80 is inserted into the recess 48, the contact members 670 and 674 elastically deform so as to be lowered to the height shown in FIG. That is, the contact members 670 and 674 are elastically deformed to the compression side between the contact points 90 and 94 and the terminals 60 and 64. A lever-shaped contact member is similarly fixed to the contacts other than the contacts 90 and 94. In the present embodiment, the contact member is an example of the “elastic portion”.

(Seventh embodiment)
Differences from the fifth embodiment will be described with reference to FIG. As shown in FIG. 11, the present embodiment is different from the fifth embodiment in the shape of the two output terminals arranged on both outer sides of the three output terminals. The shape of the recess 748 is also different from that of the fifth embodiment. In the following, the output terminal 764 that contacts the output contact 94 will be described as a representative. Note that, in FIG. 11, in order to make the shape of the output terminal 764 easy to see, the position of the vertical cross section is moved from the position of FIG. Please note that.

The upper end of the output terminal 764 is divided into a first protrusion 764b and a second protrusion 764c. The first projecting portion 764b extends in the up-down direction, and the upper end thereof is provided with a curved portion similar to that of the fifth embodiment. The curved portion faces the output contact 94. When the curved portion is pressed by the output contact 94, the first projecting portion 764b elastically deforms in the direction away from the circuit package 80 at the base of the flat plate portion 42. Due to the restoring force of the elastic deformation, the electrical connection between the output terminal 764 and the output contact 94 is maintained.

On the other hand, the second protruding portion 764c is a portion that is bent into an L shape along the lower surface of the circuit package 80 and the side surface on the discharge pipe 44 side. The second protruding portion 764c is disposed in the recess 48 with the L-shaped horizontal portion in contact with the upper surface of the flat plate portion 42 and the L-shaped rising portion in contact with the bottom surface of the recess 48. The circuit package 80 is inserted between the L-shaped rising portion of the second projecting portion 764c and the first projecting portion 764b to be inserted into the recess 748. That is, the circuit package 80 is supported by the flange 40 by coming into contact with the second protrusion 664c.

The effect of this embodiment will be described. For example, even if the output terminal 764 moves following the expansion of the flange 40, the circuit package 80 inserted between the first projecting portion 764b and the second projecting portion 764c has a direction in which the output terminal 764 moves. Move in the same direction. Therefore, the elastic deformation of the first protrusion 764b is maintained to the same extent as when the flange 40 does not expand. The curved portion of the first protruding portion 764b and the output contact 94 are not separated from each other, and the contact between the curved portion and the output contact 94 can be favorably maintained.

Although the embodiments of the technology disclosed in the present specification have been described above in detail, these are merely examples, and the fuel pump disclosed in the specification includes various modifications and changes of the above-described embodiments. Be done.

(1) In the above-described first embodiment, the support portion 46 has the pair of walls 48a and 48b facing each other in the longitudinal width direction of the circuit package 80. However, for example, the support portion 46 may not have the pair of walls 48 a and 48 b but may have one wall that faces the side surface of the circuit package 80 on the discharge pipe 44 side. In this modification, the "positioning wall" can be omitted.

(2) In each of the above embodiments, the case 84 of the circuit package 80 is exposed to the outside of the fuel pump 10 at least on its upper surface. However, the circuit package 80 may not include the ceramic case 84, and the entire surface of the drive circuit 82 may be covered with resin or the like. In this modification, the “case” can be omitted.

(3) The “fuel pump” in the present specification may be used in vehicles such as four-wheel vehicles as well as two-wheel vehicles.

Further, the technical elements described in the present specification or the drawings exert technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technique illustrated in the present specification or the drawings achieves a plurality of purposes at the same time, and achieving the one purpose among them has technical utility.

10: Fuel pump 20: Housing 22: Opening 24: Motor 26: Suction pipes 40, 240, 340, 440: Flange 42: Flat plate part 44: Discharge pipes 46, 246, 346, 446: Support parts 48, 448, 548: Recesses 348c, 348d: Walls 48a, 48b, 248a, 248b, 348a, 348b, 448a, 448b: Walls (positioning)
60, 62, 360, 362, 460, 462, 560, 562: input terminals 60a, 62a, 360a, 362a, 460a, 462a, 560a, 562a: protrusions 64-68, 564, 764: output terminals 70, 72, 74, 76: U-shaped member 80: Circuit package 82: Driving circuit 84: Cases 90, 92: Input contacts 94, 96, 98: Output contacts 248, 348: Housing parts 250, 350, 450: Potting materials 448e, 448f: Claw 452: Covers 560b, 562b: Curved portions 670, 674: Contact member 764b: First protruding portion 764c: Second protruding portion

Claims (7)

A housing having an opening and containing the motor;
A flange that closes the opening and has a fuel pipe that communicates with the inside of the housing,
A conductive member that is supported by the flange and supplies electric power to the motor,
A driving circuit that is supported by the flange at a position facing the conductive member and has a contact facing the conductive member;
The fuel pump, wherein the conductive member is elastically deformed by being pressed by the contact. The fuel pump according to claim 1, wherein the housing has a pair of positioning walls facing each other with the drive circuit interposed therebetween. The fuel pump according to claim 1, wherein a portion of the contact and the conductive member that protrudes from the flange is covered with resin. The fuel pump according to claim 3, wherein the resin deforms following the deformation of the conductive member. The drive circuit is housed in a ceramic case,
By contacting the flange with the case, the drive circuit is supported by the flange,
The fuel pump according to claim 1, wherein the case is exposed to the outside of the fuel pump. The conductive member is
A conductive elastic portion fixed to the contact,
The terminal portion supported by the flange, and facing the contact and the elastic portion in between,
The fuel pump according to any one of claims 1 to 5, wherein the elastic portion is disposed so as to be elastically deformed toward the compression side between the contact point and the terminal portion. The conductive member protrudes from the flange, and includes a protrusion having a chevron portion protruding toward the contact at the tip,
The fuel pump according to any one of claims 1 to 5, wherein the chevron portion is pressed against the contact so as to elastically deform the protrusion in a direction away from the drive circuit.

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