JP4944568B2 - Fuel supply device - Google Patents

Description

According to the present invention, a fuel pump provided with a fuel filter, which is inserted into the fuel tank through the opening , is attached to a lid member that closes an opening formed in the bottom of the fuel tank . The fuel pump is connected to a pump suction passage of the fuel pump, and the pump discharge passage of the fuel pump relates to a fuel supply device connected to a fuel discharge passage formed in the lid member .

A conventional fuel supply apparatus is disclosed in Japanese Patent Application Laid-Open No. 11-93794 (Patent Document 1). According to this, an opening is formed in the bottom of the fuel tank, and this opening is closed by the lid member. In addition, a fuel pump is fastened and attached to the stay standing on the lid member by a band, and a fuel filter is connected to a pump suction path protruding from the lower side of the fuel pump. The pump discharge path protruding from above is erected on the lid member and connected to a fuel discharge pipe that opens to the outside of the fuel tank via a fuel pipe. Thus, a fuel pump including a fuel filter is inserted and disposed in the fuel tank from the opening of the fuel tank, and the opening is closed by the lid member, thereby forming a fuel supply device. When the fuel pump is driven, foreign fuel contained in the fuel is removed from the fuel in the fuel tank by the fuel filter, and clean fuel is sucked into the fuel pump through the pump suction passage and boosted by the fuel pump. The fuel thus supplied is supplied from a fuel discharge pipe toward a fuel injection valve outside the fuel tank.
JP-A-11-93794

  According to such a conventional fuel supply device, the pump suction path of the fuel pump is arranged to open near the bottom of the fuel tank, and the fuel filter is connected to this opening. This is because the fuel stored in the fuel tank is effectively used to reduce the dead fuel amount (meaning the amount of fuel in the fuel tank that the fuel pump cannot inhale the fuel in the fuel tank) as much as possible. To be done. On the other hand, motorcycles are often used for off-road driving and jumping in rough terrain, which are more undulating than four-wheeled vehicles. During operation, breathing may occur when the engine speed increases. This is because if the fuel in the fuel tank is consumed and a sudden jump is performed in a state where there is a large space above the fuel level in the fuel tank, the fuel in the fuel tank will move into the upper space due to its inertia. This is because the opening of the pump suction passage that opens to the bottom of the fuel tank temporarily becomes empty, and the fuel supply from the fuel pump to the fuel injection valve is temporarily or intermittently performed. . The above phenomenon tends to be more noticeable as the remaining amount of fuel in the fuel tank decreases, and this is considered to be caused by the intense upward movement of the fuel in the fuel tank.

This onset Ming has been made in view of the above problems, even in the time of acceleration operation immediately after the sudden jump and jump travel, always stable fuel continuously be supplied toward the fuel pump to the fuel injection valve it can be, and always in particular it is possible to obtain a good driving performance employs a motorcycle to provide a suitable fuel supply system, and ease of assembly provides child a higher fuel supply device of productivity can improve For the purpose.

This onset Ming, in order to achieve the above object, the lid member closing the opening which is formed in the bottom of the fuel tank, is inserted into the fuel tank through the opening, the fuel pump with the fuel filter In the fuel supply device , wherein the fuel filter is connected to a pump suction path of the fuel pump, and a pump discharge path of the fuel pump is connected to a fuel discharge path formed in the lid member .
Wherein the lid member, and a flange portion for closing said opening, a cylindrical portion projecting upward from the flange portion, the lower is recessed downward of the bottom of the fuel tank from the upper end of the cylindrical portion a pump housing recess, one end opening to the upper end of the cylindrical portion, the other end with said fuel discharge passage for opening is provided on the outer surface of the lid member,
The pump holder, a leg portion extending in the vertical direction, in the upper part of the leg portion, and the upper pump housing recess that is recessed downward, in the lower part of the legs, the upper end of the cylindrical portion a locking flange portion that contacts one end opening into the upper pump housing recess, and the pump channel that the other end is open and protrudes downward from the engaging Tometsuba portion provided,
The fuel pump is disposed with its longitudinal direction facing up and down from the upper pump housing recess to the lower pump housing recess,
The pre-Symbol engagement Tometsuba portion, by screwing to the upper end of the lid member, with the front Ki燃 charge pump to Rikyo lifting by the said lid member and the pump holder, the pump discharge passage of the fuel pump, The insertion connection state to one end of the pump flow path, as well as the insertion connection state to the fuel discharge path of the lid member at the other end of the pump flow path,
Further a tubular filter case that will be formed by the rubber material, the pump holder, as well as arranged so as to surround the fuel pump and the fuel filter, the said tube portion or filter casing, near the bottom of the fuel tank A communication hole is provided, and the inside of the filter case and the lower pump housing recess is a series of substantially sealed fuel chambers communicating with the inside of the fuel tank via the communication hole,
In the fuel chamber, the first feature is that the fuel filter is disposed in the vicinity of the outer peripheral surface of the fuel pump with its lower end extending downward from the communication hole .
According to the present invention, in addition to the first feature, the cylindrical filter case has a lower end opening and an upper end opening that open the inside downward and upward, respectively. The second feature is that the elastic member is attached in pressure contact with the outer peripheral surface of the cylindrical portion and the outer peripheral surface of the pump holder.
Furthermore, in addition to the first or the second feature, the present invention provides the filter case, even when a protrusion is present on the outer periphery of the pump holder when the filter case is attached to the cylinder and the pump holder. The third feature is that it has elasticity that can be expanded to avoid the interference.

According to a first aspect of the present invention, a fuel pump including a fuel filter is sandwiched between a lid member and a pump holder, and is inserted into the fuel tank through an opening at the bottom of the fuel tank. The opening is a lid. It is occluded and held by the buttocks of the member. In addition, the inside of the filter case made of rubber material surrounding the fuel pump including the fuel filter and the inside of the lower pump housing recess are a series of substantially sealed fuels that communicate with the inside of the fuel tank through the communication holes. A room. According to the above, the fuel in the fuel tank is supplied to the fuel chamber through the communication hole to fill the fuel. When the fuel pump is driven, foreign matter is removed from the fuel in the fuel chamber by the fuel filter, clean fuel is sucked into the pump portion from the pump suction passage, and the fuel boosted by the pump portion is pump discharge passage, pump The fuel is supplied to the fuel discharge path through the flow path, and the fuel in the fuel discharge path is supplied to the fuel injection valve through the fuel pipe. Here, when the motorcycle suddenly jumps upward, the fuel at the bottom of the fuel tank moves into the upper space of the fuel tank due to its inertial force. according, the fuel pump is a substantially closed shape including a fuel filter disposed within the filter casing in which the fuel is full, and since the communication hole is bored in the lower end, or the cylindrical portion of the filter case, according move is large fuel in the fuel chamber is above the filter case there during jumping travel, or it is very small or to flow out from the communicating hole into the fuel tank, stably enough Naru fuel into the fuel chamber Can be stored and held. According to the above, the fuel pump, the fuel stored within the fuel chamber can be drawn into continuous fuel in the pump from the fuel filter, whereby the fuel injected at the time of acceleration operation immediately after jumping running and jumping travel Since fuel is not supplied intermittently toward the valve and fuel can be continuously supplied stably, it is possible to perform good acceleration operation immediately after jump travel and immediately after jump travel. In addition, since the fuel filter is disposed in the filter case, the fuel filter can be reliably protected and the fuel filter is not damaged. Further, when the engine is stopped, the foreign matter floating in the fuel tank is directly The fuel filter does not fall and accumulate. In particular, since the filter case is made of a rubber material, the following effects can be achieved. First, in the first step, the fuel pump including the fuel filter is sandwiched and fixed by the lid member and the pump holder in the first step, and in the second step, the cylindrical filter case is attached to the pump holder, It arrange | positions so that the said fuel pump and the said fuel filter may be enclosed. According to the above, in the first step, the fuel pump provided with the fuel filter can be visually observed and can be clamped by the lid member and the pump holder, so that the fuel pump can be assembled accurately and the clamped state is ensured. As a result, the ease of assembly can be greatly improved .
By further the filter case is formed by a rubber material, a motor driving sound fuel pump occurring, the operating noise of the pump unit as compared to a material having rigidity such as a synthetic resin material very effectively Can absorb. In addition, the pump holder has a locking collar formed below the leg portion that is brought into contact with the upper end of the cylindrical portion of the lid member and is screwed and fixed by a screw. Therefore, the pump holder can be securely fixed to the lid member, and the fuel pump including the fuel filter can be securely held between the lid member and the pump holder. Furthermore, the lid member and the pump holder are screwed and fixed so that the pump discharge passage of the fuel pump is inserted and connected to one end of the pump passage, and the other end of the pump passage is inserted and connected to the fuel discharge passage of the lid member. Therefore, fuel piping in the fuel supply device formed by the lid member and the pump holder can be performed very easily.
According to the second feature of the present invention, the lower end opening and the upper end opening of the filter case use the elastic force inherent to the rubber material without using any fastening means, and the outer peripheral surface of the cylinder portion and the outer periphery of the pump holder. The chamber can be attached while being elastically pressed against the surface, and therefore, a sealed chamber can be easily formed inside the filter case without being affected by the shape of the outer periphery thereof.
According to the third aspect of the present invention, since the filter case has elasticity, even when the protrusion is present on the outer periphery of the pump holder, the filter case is elastically expanded and deformed to interfere with the protrusion. Thus, the lower end opening and the upper end opening of the filter case can be easily attached to the outer periphery of the cylindrical portion and the outer periphery of the pump holder, and the assemblability of the filter case can be improved.

An embodiment of the fuel supply apparatus according to the present invention will be described below with reference to FIG. T is a fuel tank in which fuel is stored, and an opening Tb is formed in the bottom portion Ta. The fuel supply device U is formed by the following. Reference numeral 1 denotes a lid member, which is formed as follows. Reference numeral 2 denotes a flange that closes the opening Tb of the fuel tank T. The cylinder 3 protrudes upward from the flange 2. An upper end 3a of the cylindrical portion 3 is formed as a flat surface, and a lower pump housing recess 4 is formed downward from the upper end 3a toward the bottom portion Ta of the fuel tank T. Further, a fuel discharge path 5 is drilled downward from the upper end 3a of the cylindrical portion 3, and the fuel discharge path 5 is opened and opened outward below the cylindrical portion 3. That is, the upstream side of the fuel discharge path 5 opens to the upper end 3 a of the cylindrical portion 3, and the downstream side opens to the outer periphery of the lid member 1 . Upstream of the upper SL, downstream intends words in the flow direction of the fuel. A female screw hole 6 is drilled downward from the upper end 3a of the cylindrical portion 3, and a communicating hole 7 that is located near the bottom portion Ta of the fuel tank T and orthogonal to the cylindrical portion 3 penetrates the cylindrical portion 3. And then drilled. As a result, the lower pump housing recess 4 formed inside the tube portion 3 is communicated to the outside of the tube portion 3 via the communication hole 7. Reference numeral 10 denotes a pump holder, which is formed as follows. Reference numeral 11 denotes a leg portion extending in the vertical direction. A locking collar portion 12 is formed below the leg portion, and an upper pump housing recess 13 is formed above the locking collar portion 12. The upper pump housing recess 13 opens downward, and has a shape surrounding the upper outer periphery of the fuel pump P described later . Reference numeral 14 denotes a pump flow path provided through the leg 11. One end 14a faces downward, opens in the upper pump housing recess 13 and is drilled, and the other end 14b projects downward from the locking collar 12. Note that R is a pressure regulator arranged in communication with the pump flow path 14. Further, P is a fuel pump such as a Wesco type pump provided with a motor and a pump portion driven by the motor inside a cylindrical pump case. The fuel pump is vertically placed from the upper pump housing recess 13 to the lower pump housing recess 4. That is, it is arranged with the longitudinal direction facing the vertical direction. A pump discharge path Pa is formed protruding from the upper end of the fuel pump P, and a pump suction path Pb is formed protruding from the lower end thereof. A fuel filter 15 is attached to the pump suction passage Pb of the fuel pump P, and a filtration portion 15a formed by a net, a porous material, etc. of the fuel filter 15 extends along the longitudinal direction of the fuel pump P. The fuel pump P is disposed close to the outer peripheral surface .

  And the fuel pump P provided with the said fuel filter 15 is assembled | attached to the cover member 1 by the following. The locking collar portion 12 of the pump holder 10 is disposed in contact with the upper end 3a of the cylindrical portion 3 of the lid member 1, and at this time, the upper end Pu of the fuel pump P is disposed in the upper pump housing recess 13. At the same time, the pump discharge path Pa is inserted and disposed in one end 14a of the pump flow path 14, while the lower end Pd of the fuel pump P is disposed in the lower pump storage recess 4, and the lower end surface Pe of the fuel pump P and the lower pump storage. Between the bottom 4 a of the recess 4, a flange 15 b of the fuel filter 15 and a rubber packing 16 are disposed.

In this state, the pump holder 10 is screwed and fixed toward the lid member 1. Specifically, a screw 17 is screwed into the female screw hole 6 of the lid member 1 through the locking collar portion 12, whereby the pump holder 10 is screwed to the lid member 1, thereby The fuel pump P including the fuel filter 15 is sandwiched between the upper pump housing recess 13 of the pump holder 10, the flange 15 b of the fuel filter 15, the rubber packing 16, and the bottom 4 a of the lid member 1. The pump discharge path Pa of the fuel pump P is held in a state of being inserted into one end 14 a of the pump flow path 14, and thirdly, the fuel in which the other end 14 b of the pump flow path 14 opens to the upper end 3 a of the cylindrical portion 3. The state of being inserted into the discharge path 5 is maintained . Thus, the pump holder 10 is disposed upright above the cylindrical portion 3 of the lid member 1, and the fuel pump P including the fuel filter 15 is sandwiched and fixed between the pump holder 10 and the lid member 1.

Here, the filter case 20 is formed by the following. With the filter case 20 is formed by a rubber material, in which forms a cylindrical shape with the vertical direction is open, transverse outside of the fuel pump P The cross section of the cylindrical shape with the legs 11, the fuel filter 15 of the pump holder 10 It is formed larger than the shape. The lower end opening 20a of the filter case 20 is fitted and arranged on the outer peripheral surface of the cylindrical portion 3 of the lid member 1, and the upper end opening 20b is arranged on the outer peripheral surface (specifically, the leg portion 11) above the pump holder 10. wherein, and the upper pump housing recess 13 communicating hole 7 which is formed in the cylindrical portion 3 in fit connection arranged Ru (Note the toward the outer circumferential surface of a portion) surrounding the occlusion by the inner periphery of the lower end of the filter case 20 Is never done ). The filter case 2 0 is is for mounting the upper portion of the pump holder 10 toward the lower end opening 20a of the filter case 20 to the cylindrical portion 3, this time the lower end opening 20a is pressure in the filter case 20 regulator R, pump Although it may interfere with the outer periphery of the holder 10, the filter case 20 made of a rubber material has elasticity, so that the lower end opening 20a is elastically expanded to avoid interference with them. Therefore, the filter case 20 can be inserted and assembled even after the pump holder 10 is assembled to the lid member 1. According to the above, the fuel pump P including the fuel filter 15 is disposed inside the filter case 20, and the upper end opening 20 b of the filter case 20 is fitted and connected to the outer periphery above the pump holder 10. The lower end opening 20 a is fitted and connected to the outer periphery of the cylindrical portion 3. Thus, a series of fuel chambers G that are substantially sealed are constituted by the inside of the filter case 20 attached to the cylindrical portion 3 and the pump holder 10 and the inside of the lower pump housing recess 4, and the fuel filter 15 is provided in the fuel chamber G. The fuel pump P is accommodated. The fuel chamber G extends from the lower side of the communication hole 7 provided in the cylindrical portion 3 and located near the bottom portion Ta of the fuel tank T to the upper side thereof, and communicates with the inside of the fuel tank T through the communication hole 7. . The fuel filter 15 is disposed close to the outer peripheral surface of the fuel pump P so that its lower end is stored in the fuel chamber G below the communication hole 7, that is, in the lower pump storage recess 4.

  Thus, the fuel supply device U including the lid member 1, the pump holder 10 and the fuel pump including the fuel filter 15 and the filter case 20 formed of a rubber material is formed. The fuel supply device U is configured as follows. It is attached to the fuel tank T.

  The pump holder 10 including the filter case 20 is inserted into the fuel tank T from the opening Tb of the bottom portion Ta of the fuel tank T, and the flange portion 2 of the lid member 1 is fixed in contact with the bottom portion 7a. The portion Tb is closed and held by the lid member 1. According to the above, the fuel pump P including the filter case 20, the pump holder 10, and the fuel filter 15 sandwiched between the pump holder 10 and the lid member 1 is inserted and disposed in the fuel tank T. The pump storage chamber G formed inside the filter case 20 communicates with the fuel tank T through the communication hole 7, and the fuel in the fuel tank T is supplied into the pump storage chamber G through the communication hole 7. The pump storage chamber G is filled with fuel. Further, the fuel discharge path 5 connected to the pump flow path 14 is arranged to open outward from the lid member 1, and the opening of the fuel discharge path 5 is communicated to a fuel injection valve through a fuel pipe (not shown).

  Next, the operation will be described. When the engine is stopped, the motor of the fuel pump P is in a non-energized state, and fuel is not supplied from the fuel pump P to the pump flow path 14. Further, during operation of the engine, energization of the motor of the fuel pump P is started, and the pump unit starts to be driven by the rotation of the motor. According to the driving of the pump unit, the foreign matter in the fuel filling the pump storage chamber G is removed by the fuel filter 15, and clean fuel is sucked into the pump unit through the pump suction path Pb and boosted by the pump unit. Fuel is discharged into the pump flow path 14 from the pump discharge path Pa. Then, the fuel supplied into the pump flow path 14 is supplied to the fuel discharge path 5, and this fuel is further supplied from the fuel injection valve to the engine via a fuel pipe (not shown) so that the engine can be operated well. Can be implemented. The fuel in the fuel tank T is always supplied into the pump storage chamber G from the communication hole 7.

Here, when the fuel tank T provided with the fuel supply device is mounted on the motorcycle and the motorcycle is subjected to the undulating off-road traveling and the jump traveling, the fuel tank T The internal fuel moves toward the upper space of the fuel tank T due to its inertial force, and the fuel near the bottom of the fuel tank T may become empty. This becomes more noticeable when the upper space in the fuel tank T is large (the remaining amount of fuel is small). Here, in the fuel supply device U according to the present invention, the pump storage chamber G that is substantially isolated from the fuel tank T is formed in the fuel tank T. The fuel in the tank does not flow out into the fuel tank T, and sufficient fuel can always be stored and held in the pump storage chamber G. According to the above, since the pump suction path Pb including the fuel filter 15 can be reliably disposed in the pump storage chamber G filled with fuel during the jump traveling, sufficient fuel is always supplied to the pump discharge path Pa and the pump flow. Since the fuel can be supplied to the fuel injection valve via the path 14, the fuel discharge path 5, and the fuel pipe, good off-road traveling and jump traveling can be performed. In addition, according to the fact that the substantially entire outer periphery of the fuel filter 15 is surrounded by the filter case 20, the fuel filter 15 can be reliably protected against obstacles and is not damaged. Further, when the engine is stopped, Foreign matters floating in the fuel in the fuel tank do not fall directly on the fuel filter 15 and accumulate, and the good filtration performance of the fuel filter 15 can be maintained over a long period of time. Further, since the filter case 20 is formed of a rubber material and is formed in a cylindrical shape having an upper end opening 20b and a lower end opening 20a, the following special effects can be achieved. First, when the fuel supply device U is assembled, the pump holder 10 is screwed to the lid member 1 in the first step, and the filter case 20 is connected to the cylinder portion 3 of the lid member 1 and the pump in the second step. The holder 10 can be fitted and connected to the outer periphery of the upper part. This is because the filter case 20 is formed of a rubber material, and the lower end opening 20a can be assembled by expanding its diameter using an elastic force. According to the above, since the fuel pump P provided with a fuel filter 15 in a state where the cylindrical portion 3 and the pump holder 10 of the lid member 1 is exposed it sandwiched therebetween, the fuel pump P and the cover member 1 and the pump holder 10 Can be assembled while visually observing the clamping state and the insertion state of the pump discharge path Pa into the one end 14a of the pump flow path 14, so that the assemblability can be greatly improved. Second, when fitted and connected to the upper end opening 20b of the filter case 20 to the upper periphery of the pump holder 10, and when fitted and connected to the lower end opening 20a of the filter case 20 to the outer periphery of the cylindrical portion 3, an upper end opening 20b and the upper periphery of the lower end opening 20a with a resilient force which they have, as it can fit connection pressure contact state to the outer periphery of the cylindrical portion, according to their upper end opening 20b, the fastening member of the band or the like to the lower end opening 20a Do not need. Further, the upper end opening 20b and the lower end opening 20a can be fitted and connected in accordance with the shapes of the upper outer periphery of the pump holder 10 and the outer periphery of the cylindrical portion 3, and the pump storage chamber G having a substantially sealed shape can be easily formed. Thirdly, the filter case 20 can effectively store the driving sound of the motor constituting the fuel pump P and the operating sound of the pump part. This is because the filter case 20 is made of a rubber material having elasticity from a highly rigid material such as a synthetic resin material. Fourth, when the pump holder 10 is screwed to the lid member 1, the locking collar 12 at the lower end of the leg portion 11 is brought into contact with the upper end 3 a of the cylindrical portion 3 of the lid member 1 and screwed with the screw 17. As a result, the pressing force for fastening does not act on the leg portion 11, thereby eliminating the need to greatly increase the strength of the leg portion 11.

The longitudinal cross-sectional view which shows one Example of the fuel supply apparatus of this invention.

G fuel chamber 1 lid member 2 flange 3 cylinder 3a upper end of cylinder 4 lower pump storage recess 5 fuel discharge path 7 communication hole 10 pump holder 11 leg 12 locking hook 13 upper pump storage recess 14 pump flow path 15 Fuel filter 20 Filter case 20a Lower end opening 20b Upper end opening

Claims (3)

A fuel filter inserted into the fuel tank (T) through the opening (Tb) into the lid member (1) for closing the opening (Tb) formed in the bottom (Ta) of the fuel tank (T) A fuel pump (P) having (15) is attached, the fuel filter (15) is connected to a pump suction path (Pb) of the fuel pump (P), and a pump discharge path of the fuel pump (P) (Pa) is a fuel supply device connected to the fuel discharge passage (5) formed in the lid member (1) ,
Wherein the cover member (1), the flange portion (2) for closing the opening (Tb), the cylindrical portion protruding upward from the flange portion (2) and (3), the cylindrical portion (3 ) and the upper end (bottom of the fuel tank (T) from 3a) below the pump housing recess (4 that is recessed downward of (Ta)) of one end opening to the upper end (3a) of the tubular portion (3) and, the other end the fuel discharge passage for opening (5) and is provided on the outside surface of the lid member (1),
The pump holder (10), a leg portion extending in the vertical direction (11), in the upper part of the leg portion (11), the upper pump housing recess that is recessed downward (13), said legs in the lower part (11), a holding flange which is in contact with the upper end (3a) of the tubular portion (3) (12), one end opening into the upper pump housing recess (13), the other A pump flow path (14) having an end projecting downward from the locking hook (12) and opening ;
The fuel pump (P) is disposed with its longitudinal direction facing up and down from the upper pump housing recess (13) to the lower pump housing recess (4),
Before SL engagement Tometsuba portion (12) and by screwing the upper end (3a) of the lid member (1), wherein the front Ki燃 charge pump (P) a lid member (1) and the pump holder (10) while Rikyo lifting by the preparative, the pump discharge passage of the fuel pump (P) in (Pa), the insertion connection to the one end (14a) of said pump channel (14), and said pump channel (14) The other end (14b) of the lid member (1) is kept inserted and connected to the fuel discharge path (5),
Further a tubular filter case that will be formed by a rubber material (20), the pump holder (10), as well as arranged so as to surround the fuel pump (P) and the fuel filter (15), said tubular portion ( 3) or the filter case (20) is provided with a communication hole (7) located near the bottom of the fuel tank (T) so that the inside of the filter case (20) and the inside of the lower pump storage recess (4) are provided. A series of substantially sealed fuel chambers (G) communicating with the inside of the fuel tank (T) through the communication hole (7),
In this fuel chamber (G), the fuel filter (15) is disposed close to the outer peripheral surface of the fuel pump (P) with its lower end extending downward from the communication hole (7). Fuel supply device.   The fuel supply device according to claim 1, wherein
  The cylindrical filter case (20) has a lower end opening (20a) and an upper end opening (20b) that open the inside downward and upward, respectively, and the lower end opening (20a) and the upper end opening (20b) are A fuel supply device, wherein the fuel supply device is attached in pressure contact with the outer peripheral surface of the cylindrical portion (3) and the outer peripheral surface of the pump holder (10) by its own elastic force.   The fuel supply device according to claim 1 or 2,
  When the filter case (20) is attached to the cylindrical portion (3) and the pump holder (10), even if the protrusion (R) exists on the outer periphery of the pump holder (10), the protrusion (R) A fuel supply device characterized by having an elasticity capable of expanding the diameter so as to avoid interference.

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