JP6192939B2 - Connecting structure of fuel tank parts - Google Patents

Description

  The present invention relates to a connecting structure for components in a fuel tank.

  2. Description of the Related Art Conventionally, a fuel supply device including an in-tank fuel pump that supplies fuel in a fuel tank to an internal combustion engine has been widely used. In the fuel supply device, for example, a bottomed cylindrical pump case that accommodates and holds the fuel pump vertically is divided into two vertically, and the divided upper pump pump case member and lower pump pump case member are divided into two parts. Some have snap-fit connections to each other (see, for example, Patent Document 1). A connecting structure of components in the fuel tank according to a conventional example (see Patent Document 1) will be described. FIG. 13 is a schematic view showing a coupling structure of components in the fuel tank, and FIG. 14 is a sectional view showing a peripheral portion of the engaging means.

As shown in FIG. 13, a bottomed cylindrical pump case 100 that holds and holds a fuel pump in a vertical orientation is divided into an upper pump case member 109 and a lower pump case member 117. . The upper pump case member 109 is formed in a cylindrical shape surrounding the fuel pump 111 (see FIG. 14). The lower pump case member 117 is formed in a bottomed cylindrical shape that supports the bottom of the fuel pump 111.
As shown in FIG. 14, the lower end portion of the upper pump case member 109 is formed so as to be fitted in the cylindrical portion of the lower pump case member 117. An engaging claw 116 is formed on the outer peripheral surface of the lower end portion of the upper pump case member 109. An engagement hole 120 that can be engaged with the engagement claw 116 of the upper pump case member 109 is formed in the cylindrical portion of the lower pump case member 117. As the lower end portion of the upper pump case member 109 is fitted into the cylindrical portion of the lower pump case member 117, the engaging claw 116 and the engaging hole 120 are engaged using elasticity. As a result, the upper pump case member 109 and the lower pump case member 117 are snap-fit coupled in a retaining state. The engaging means is constituted by the engaging claw 116 and the engaging hole 120.

JP 2011-69284 A

According to the conventional example, the engagement hole 120 is formed in a substantially rectangular shape having a substantially similar shape larger than the outer shape of the engagement claw 116 so as to easily engage the engagement claw 116. For this reason, a gap exists between the engagement claw 116 and the engagement hole 120 in a direction (left-right direction in FIG. 13) intersecting with the engagement / disengagement direction (up-down direction in FIG. 13). Further, when the rotational torque of the fuel pump 111 acts on the lower pump case member 117, the lower pump case member 117 intersects the engagement / disengagement direction with respect to the upper pump case member 109 (circumferential direction). There was a risk of rattling, vibration and noise. In addition, by engaging the engagement claw 116 and the engagement hole 120 in a direction intersecting the engagement / disengagement direction without a gap, the engagement / disengagement direction between the upper pump case member 109 and the lower pump case member 117 is intersected. It is possible to suppress the rattling in the direction of the movement. However, it is not practical because the engaging claw 116 and the engaging hole 120 must be formed with a very high accuracy and the both 116 and 120 must be carefully engaged.
The problem to be solved by the present invention is to provide a connecting structure for parts in a fuel tank capable of suppressing rattling in a direction crossing the engaging / disengaging direction of two members snap-fit connected via an engaging means. There is to do.

Said subject is solved by each following invention.
According to a first aspect of the present invention, there is provided an engaging convex portion and an engaging concave portion that can be snap-fit-coupled to each other so that the two members are prevented from coming off by mutual engagement using elasticity between the two members disposed in the fuel tank. A fuel tank connecting part coupling structure comprising the engaging means, wherein the two members are opposed to each other between the engaging convex portion and the engaging concave portion of the engaging means, and the two members are pulled out. Before the displacement of the two members is separated in a direction intersecting with the engagement / disengagement direction of the two members, and a rattling prevention convex portion abutting in a direction intersecting with the engagement / disengagement direction of the two members due to the displacement of the two members in the removal direction A rattling prevention means comprising a rattling prevention recess is provided.

  According to this configuration, the two members disposed in the fuel tank are snap-fit coupled to the engagement protrusions and the engagement recesses of the engagement means in a retaining state by mutual engagement using elasticity. At this time, the engagement convex portion and the engagement concave portion of the engagement means are displaceable in the direction in which the two members are removed, and have a gap (rattle) in a direction intersecting with the engagement / disengagement direction of the two members. Engaged. Moreover, the rattling prevention convex part of the rattling prevention means and the rattling prevention concave part are in a state of being separated in a direction crossing the engagement / disengagement direction of the two members. From this state, due to the displacement of the two members in the removal direction, the rattling prevention convex portion and the rattling prevention concave portion of the rattling prevention means come into contact with each other in a direction crossing the engagement / disengagement direction of the two members. As a result, it is possible to prevent rattling in a direction crossing the engagement / disengagement direction of the two members snap-fitted through the engagement means. As a result, the vibration and noise resulting from the rattling can be suppressed.

  According to a second aspect of the present invention, in the first aspect, the rattling prevention convex portion of the rattling prevention means and the rattling prevention concave portion intersect the engagement / disengagement direction of the two members due to displacement in the removal direction of the two members. Inclined surfaces that contact each other in at least one direction are formed. According to this structure, the rattling prevention convex part and the rattling prevention concave part can be made to contact | abut smoothly.

  According to a third invention, in the second invention, the rattling prevention convex portion and the rattling prevention concave portion are mutually in both directions in a direction intersecting with the engagement / disengagement direction of the two members due to displacement in the withdrawal direction of the two members. A tapered inclined surface that abuts is formed. According to this structure, the rattling prevention convex part and the rattling prevention concave part can be made to contact | abut more smoothly.

  According to a fourth invention, in the first to third inventions, the two members are an upper pump case member obtained by vertically dividing a bottomed cylindrical pump case that accommodates and holds a fuel pump in a vertically placed state, and It is a lower pump case member. According to this configuration, it is possible to suppress rattling in the direction intersecting the engagement / disengagement direction of the lower pump case member with respect to the upper pump case member, that is, in the circumferential direction.

  According to a fifth aspect, in the fourth aspect, an engagement convex portion is formed on the upper pump case member, and an engagement concave portion is formed on the lower pump case member.

  In a sixth aspect based on the fourth aspect, an engaging convex portion is formed on the lower pump case member, and an engaging concave portion is formed on the upper pump case member.

It is sectional drawing which shows the coupling structure of the components in a fuel tank concerning Embodiment 1. FIG. It is a front view which shows the peripheral part of a 1st engagement means. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. It is a front view which decomposes | disassembles and shows the peripheral part of a 1st engagement means. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. It is a front view which shows the peripheral part of a 2nd engagement means. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. It is a front view which shows the peripheral part of the 1st engaging means concerning Embodiment 2. FIG. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8. It is a front view which shows the peripheral part of the 1st engaging means concerning Embodiment 3. It is a front view which shows the peripheral part of the 1st engagement means concerning Embodiment 4. FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. 11. It is the schematic which shows the joining structure of the components in a fuel tank concerning a prior art example. It is sectional drawing which shows the peripheral part of an engaging means.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[Embodiment 1]
Embodiment 1 will be described. In the present embodiment, a vehicle fuel supply device including a pump case as a fuel tank internal part is illustrated. FIG. 1 is a cross-sectional view showing a connecting structure of components in a fuel tank.
As shown in FIG. 1, an opening 12 is formed in the upper wall 11 of the fuel tank 10. The fuel supply device 15 includes a fuel pump 17, a pump case 20 that houses the fuel pump 17, a lid member 22 that is connected to the pump case 20, and the like. The pump case 20 is inserted into the fuel tank 10 from the opening hole 12. A lid member 22 is mounted on the upper wall 11 of the fuel tank 10 so as to close the opening hole 12.

  The lid member 22 is made of synthetic resin. A cylindrical tube portion 23 is formed on the lower surface side of the lid member 22. The cylinder portion 23 is fitted in the opening hole 12 of the fuel tank 10. A plurality (two are shown in FIG. 1) of connecting claws 25 are formed on the outer peripheral surface of the cylindrical portion 23 at a predetermined interval in the circumferential direction. The connecting claw 25 is formed in a trapezoidal cross section with the upper surface as a horizontal plane. A fuel discharge pipe 27 that extends through the lid member 22 is formed at the center of the lid member 22. The upper end portion of the fuel discharge pipe 27 is connected to an engine (specifically, an injector) via a fuel supply pipe (not shown).

The pump case 20 is formed in a bottomed cylindrical shape that accommodates and holds the fuel pump 17 vertically. The pump case 20 is divided into an upper pump case member 30 and a lower pump case member 32. The upper pump case member 30 is formed in a cylindrical shape surrounding the fuel pump 17 . The lower pump case member 32 is formed in a bottomed shape that supports the bottom of the fuel pump 17 .

A plurality (two are shown in FIG. 1) of connecting holes 34 are formed at the upper end of the upper pump case member 30. The cylinder portion 23 of the lid member 22 is fitted into the upper end portion of the upper pump case member 30, and the connection claw 25 and the connection hole 34 are elastic (for example, the elasticity of the peripheral portion on the connection hole 34 side). By engaging, the lid member 22 and the upper pump case member 30 are snap-fit coupled in a retaining state.
In the upper part of the upper pump case member 30, a cylindrical connection tube portion 36 is formed in a double tube shape. The upper end portion of the connecting cylinder portion 36 is connected to the lower end portion of the fuel discharge pipe 27 of the lid member 22 by fitting. In addition, the fuel pump 17 is arranged vertically in the lower part of the upper pump case member 30. The fuel suction port 38 of the fuel pump 17 is disposed downward, and the fuel discharge port 39 is disposed upward. The fuel discharge port 39 is connected to the lower end portion in the connection cylinder portion 36 by fitting.

  The lower pump case member 32 includes a circular plate-shaped bottom plate portion 41. A plurality of (for example, two on the left and right) connecting pieces 43 extending upward are formed on the outer peripheral portion of the bottom plate portion 41 at a predetermined interval in the circumferential direction. A lower end portion of the upper pump case member 30 can be fitted between the connection pieces 43. Further, both connection pieces 43 are formed so as to be elastically deformable (so-called flexibly deformable) outward in the radial direction of the lower pump case member 32 (see a two-dot chain line 43 in FIG. 1).

  At the center of the bottom plate portion 41, a circular connecting pipe portion 45 extending downward in the axial direction is formed. A fuel intake port 38 of the fuel pump 17 is connected to the upper end portion of the connecting pipe portion 45 by fitting. A suction filter 47 is integrally provided at the lower portion of the connecting pipe portion 45. The suction filter 47 has a bag-like filter member 48. The filter member 48 is made of, for example, a flexible nonwoven fabric, mesh material, filter paper, knitted fabric, or the like. In addition, a resin holding frame (not shown) for holding the filtering member 48 in an enormous state is provided inside the filtering member 48. The connecting pipe portion 45 is joined to the filtration member 48 of the suction filter 47 and the built-in frame by joining means such as welding and adhesion, and communicates with the internal space of the filtration member 48. Although not shown, the connecting pipe portion 45 may be integrated with a filter case that accommodates the suction filter 47 and can store fuel.

  Next, the coupling structure of both pump case members 30 and 32 of the pump case 20 will be described in detail. The upper pump case member 30 and the lower pump case member 32 are snap-fit coupled via first engagement means 50 and second engagement means 60 disposed at a predetermined interval in the circumferential direction. The first engaging means 50 and the second engaging means 60 basically have the same configuration. Further, the first engagement means 50 is provided with the rattling prevention means 70, but the second engagement means 60 is not provided with the rattling prevention means 70. For convenience of explanation, the first engagement means 50 will be explained after the second engagement means 60 is explained first. The pump case 20 corresponds to a “component in the fuel tank” in this specification. The upper pump case member 30 and the lower pump case member 32 correspond to “two members” in the present specification.

The second engaging means 60 will be described. 6 is a front view showing a peripheral portion of the second engaging means, and FIG. 7 is a cross-sectional view taken along line VII-VII in FIG.
As shown in FIGS. 6 and 7, the second engagement means 60 includes a second engagement claw 62 and a second engagement hole 64. The second engaging claw 62 is formed on the outer peripheral surface of the lower end portion of the upper pump case member 30. The second engaging claws 62 are formed in a trapezoidal cross section with the upper surface 62a as a horizontal plane (see FIG. 7). Moreover, the external shape of the 2nd engagement nail | claw 62 is formed in the oblong shape in front view (refer FIG. 6).

  The second engagement hole 64 is formed in the connection piece 43 on one side (right side in FIG. 1) of the lower pump case member 32. The second engagement hole 64 is formed so as to be engageable with the second engagement claw 62. Further, the second engagement hole 64 is formed in a substantially similar long rectangular shape that is a predetermined amount larger than the outer shape of the second engagement claw 62 so that the second engagement claw 62 can be easily engaged. Yes. Further, in the engaged state between the second engagement claw 62 and the second engagement hole 64, both 62 and 64 are movable with a predetermined movement amount in the engagement / disengagement direction (vertical direction in FIGS. 6 and 7). The Further, the upper surface 62a of the second engagement claw 62 and the hole wall surface (reference numeral 64a) on the upper side of the second engagement hole 64 are opposed to the removal direction (vertical direction) of both the pump case members 30 and 32. The The second engaging claws 62 correspond to “engagement convex portions” and “second engagement convex portions” in the present specification. The second engagement hole 64 corresponds to “engagement recess” and “second engagement recess” in this specification.

The first engaging means 50 will be described. 2 is a front view showing a peripheral portion of the first engaging means, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a front view showing the peripheral portion of the first engaging means in an exploded manner. 5 is a cross-sectional view taken along line VV in FIG.
As shown in FIGS. 2 and 3, the first engagement means 50 includes a first engagement claw 52 and a first engagement hole 54. The first engaging claw 52 is formed on the outer peripheral surface of the lower end portion of the upper pump case member 30. The first engagement claw 52 is disposed at a position opposite to the second engagement claw 62 (see FIG. 1). The first engagement claw 52 is basically formed in the same shape as the second engagement claw 62 (see FIGS. 4 and 5).

  The first engagement hole 54 is formed in the connection piece 43 on the other side (left side in FIG. 1) of the lower pump case member 32. The first engagement hole 54 is formed with a first engagement hole 54 that can be engaged with the first engagement claw 52. The first engagement hole 54 is basically formed in the same shape as the second engagement claw 62 (see FIGS. 4 and 5). Further, in the engaged state of the first engaging claw 52 and the first engaging hole 54, both 52 and 54 are movable with a predetermined moving amount in the engaging / disengaging direction (vertical direction in FIGS. 2 and 3). The Further, the upper surface (reference numeral 52a) of the first engagement claw 52 and the upper wall surface (reference numeral 54a) of the first engagement hole 54 are in the direction in which both pump case members 30, 32 are removed (see FIG. (Vertical direction). The first engagement claws 52 correspond to “engagement projections” and “first engagement projections” in this specification. The first engagement holes 54 correspond to “engagement recesses” and “first engagement recesses” in this specification.

  As shown in FIG. 4, between the first engagement claw 52 and the first engagement hole 54 of the first engagement means 50, the pump case members 30, 32 face each other in the removal direction (vertical direction). A rattling prevention means 70 is provided. The rattling prevention means 70 includes a rattling prevention convex part 72 and a rattling prevention concave part 74. The rattling prevention convex portion 72 is formed in an inverted V shape at the center portion in the left-right direction of the upper surface 52a of the first engagement claw 52. The rattling-preventing convex portion 72 has tapered left and right inclined surfaces 72a. Further, the rattling-preventing recess 74 is formed in an inverted V-shaped groove at the center in the left-right direction of the hole wall surface 54 a on the upper side of the first engagement hole 54. The rattling prevention concave portion 74 has a right and left inclined surface 74 a that is symmetrical to the left and right and that corresponds to both the inclined surfaces 72 a of the rattling prevention convex portion 72. In addition, each inclined surface 72a, 74a is formed in linear form.

  When the upper pump case member 30 and the lower pump case member 32 are coupled, the lower end portion of the upper pump case member 30 is fitted between the connecting pieces 43 of the lower pump case member 32. Combine. Accordingly, the first engagement claw 52 and the first engagement hole 54 of the first engagement means 50 including the rattling prevention means 70 are elastic (connection corresponding to the peripheral portion on the first engagement hole 54 side). Engage using the elasticity of the piece 43. Further, the second engagement claw 62 and the second engagement hole 64 of the second engagement means 60 are engaged by utilizing elasticity (elasticity of the connection piece 43 corresponding to the peripheral portion on the second engagement hole 64 side). Match. As a result, the upper pump case member 30 and the lower pump case member 32 are snap-fit coupled in a retaining state.

  At this time, in the first engagement means 50, the first engagement claw 52 and the first engagement hole 54 are displaceable in the direction in which both the pump case members 30 and 32 are removed (vertical direction), and The pump case members 30 and 32 are engaged with each other with a gap (rattle) in a direction crossing the engaging / disengaging direction. Moreover, the rattling prevention convex part 72 of the rattling prevention means 70 and the rattling prevention concave part 74 intersect with the engagement / disengagement direction (vertical direction in FIG. 2) of both pump case members 30 and 32 (FIG. 2). 2 in the left-right direction). Further, in the second engagement means 60, the second engagement claw 62 and the second engagement hole 64 are displaceable in the removal direction (vertical direction) of both pump case members 30, 32, and both The pump case members 30 and 32 are engaged with a gap (rattle) in a direction (left and right direction in FIG. 6) that intersects with the engagement / disengagement direction (up and down direction in FIG. 6). This state is a state before displacement of both pump case members 30 and 32 in the removal direction (vertical direction). Therefore, the first engagement claw 52 and the first engagement hole 54 of the first engagement means 50 and the second engagement claw 62 and the second engagement hole 64 of the second engagement means 60 can be easily set. The pump case members 30 and 32 can be easily snap-fit connected.

  From this state, due to the displacement of the pump case members 30 and 32 in the removal direction, the ratchet prevention protrusions 72 of the rattling prevention means 70 of the first engagement means 50 and the both inclined surfaces 72a of the rattling prevention protrusions 72 are not rattled. The both inclined surfaces 74a of 74 come into contact (surface contact) in a direction intersecting with the engagement / disengagement direction of both pump case members 30 and 32 (see FIG. 2). As a result, it is possible to prevent rattling in a direction crossing the engagement / disengagement direction of the two pump case members 30 and 32 that are snap-fit coupled via the first engagement means 50. At this time, the upper surface 52a of the first engagement claw 52 and the hole wall surface 54a on the upper side of the first engagement hole 54 are close (slightly separated). Further, the upper surface 52a of the second engagement claw 62 of the second engagement means 60 and the hole wall surface 54a on the upper side of the first engagement hole 54 abut (surface contact). The upper surface 52a of the first engagement claw 52 and the hole wall surface 54a on the upper side of the first engagement hole 54 may be in contact (surface contact). Further, the upper surface 52a of the second engagement claw 62 of the second engagement means 60 and the hole wall surface 54a on the upper side of the first engagement hole 54 may be close (slightly separated).

When the fuel supply device 15 is installed in the fuel tank 10 (see FIG. 1), the pump case member 32 on the lower side of the pump case 20 includes the own weight of the fuel pump 17 and the operation of the fuel pump 17. Due to this discharge fuel pressure, a force that pushes the fuel pump 17 downward acts, and the lower pump case member 32 is urged downward with respect to the upper pump case member 30, that is, in a downward state. For this reason, in the first engagement means 50, both the inclined surfaces 72a of the anti-rattle protrusion 72 of the anti-rattle means 70 and the both inclined surfaces 74a of the anti-rattle recess 74 are in contact with each other ( (See FIG. 2). Accordingly, the rotation torque of the fuel pump 17 acts on the lower side of the pump casing member 32, it is possible to prevent the rattling in the circumferential direction of the lower side of the pump casing member 32 to the upper pump casing member 30 it can. As a result, the vibration and noise resulting from the rattling can be suppressed.

  Further, the rattling prevention convex part 72 of the rattling prevention means 70 and the rattling prevention concave part 74 are displaced in the engagement direction of the two pump case members 30 and 32 due to displacement of the two pump case members 30 and 32 in the removal direction. Tapered inclined surfaces 72a and 74a are formed in contact with each other (surface contact) in both directions (left direction and right direction) intersecting with each other. Therefore, the rattling prevention convex part 72 and the rattling prevention concave part 74 can be smoothly contacted.

[Embodiment 2]
A second embodiment will be described. In the embodiments subsequent to this embodiment, since the rattling prevention means 70 of the first engagement means 50 of the first embodiment has been changed, the changed portions will be described, and redundant description will be omitted. . 8 is a front view showing a peripheral portion of the first engaging means, and FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG.
As shown in FIGS. 8 and 9, in this embodiment, the anti-rattle protrusion 72 and the anti-rattle recess 74 of the anti-rattle means 70 in the first embodiment are arranged in reverse. That is, the rattling-preventing convex portion 72 is formed upside down at the center portion in the left-right direction of the hole wall surface 54 a on the upper side of the first engagement hole 54. Moreover, the rattling prevention recessed part 74 is formed in the up-down direction in the center part of the left-right direction of the upper surface 52a of the 1st engaging claw 52.

[Embodiment 3]
A third embodiment will be described. In the present embodiment, the rattling prevention means 70 of the first engagement means 50 of the first embodiment is modified. FIG. 10 is a front view showing the periphery of the first engaging means.
As shown in FIG. 10, in this embodiment, the rattling prevention convex part 72 is formed entirely on the upper surface of the first engagement claw 52, and the rattling prevention concave part 74 is formed in the first engagement hole. 54 is formed entirely on the hole wall surface 54a on the upper side.

[Embodiment 4]
A fourth embodiment will be described. In the present embodiment, the first engaging means 50 of the first embodiment is modified. 11 is a front view showing a peripheral portion of the first engagement means, and FIG. 12 is a cross-sectional view taken along line XII-XII in FIG.
As shown in FIGS. 11 and 12, in this embodiment, both connection pieces 43 (one of which is shown in FIGS. 11 and 21) of the lower pump case member 32 are provided in the lower end portion of the upper pump case member 30. It is formed so that it can be fitted. The connecting piece 43 is formed so as to be elastically deformable (so-called flexibly deformable) inward in the radial direction of the lower pump case member 32 (see a two-dot chain line 43 in FIG. 12). Further, the first engagement claw 52 and the first engagement hole 54 of the first engagement means 50 in the first embodiment are arranged in reverse. That is, the first engagement claw 52 is formed on the outer surface of the connection piece 43 of the lower pump case member 32. A first engagement hole 54 is formed at the lower end of the upper pump case member 30. Further, rattling prevention means 70 is provided between the first engagement claw 52 and the first engagement hole 54 as in the first embodiment. Although not shown, the second engagement means 60 (see FIGS. 6 and 7) also has a second engagement claw 62 connected to the lower pump case member 32 in the same manner as the first engagement means 50. 43, and a second engagement hole 64 is formed at the lower end of the upper pump case member 30.

  The present invention is not limited to the above-described embodiment, and modifications can be made without departing from the gist of the present invention. For example, the present invention is not limited to the pump case 20 of the fuel supply device 15, and can be applied to any component in the fuel tank used in the fuel tank 10. Moreover, it may be applied to parts other than the fuel tank parts. Further, depending on the two members to be snap-fit joined, the first engaging means 50 can be used alone. In the pump case 20 of the above embodiment, the number of engaging means may be increased. In this case, at least one of the three or more engaging means may be the first engaging means 50. Further, the lower pump case member 32 may be formed in a bottomed cylindrical shape. The first engagement claw 52 and the first engagement hole 54 of the first engagement means 50 are elastic at the peripheral portion on the first engagement hole 54 side and elastic at the peripheral portion on the first engagement claw 52 side. What is necessary is just to engage using the elasticity of at least one of them. The second engagement claw 62 and the second engagement hole 64 of the second engagement means 60 are elastic at the peripheral portion on the second engagement hole 64 side and elastic at the peripheral portion on the second engagement claw 62 side. What is necessary is just to engage using the elasticity of at least one of them.

  Further, the inclined surface 72a of the anti-rattle projection 72 and the inclined surfaces 72a, 74a on one side of the inclined surface 74a of the anti-rattle recess 74 are linear vertical planes extending in the engagement / disengagement direction of the two members, The vertical planes on one side can be brought into contact with each other by utilizing sliding caused by the contact between the inclined surfaces 72a and 74a on the other side. Moreover, the rattling prevention convex part 72 and the rattling prevention concave part 74 should just contact | abut in the direction which cross | intersects the engagement / disengagement direction of two members, and each shape, contact position, the number of contact, etc. Can be appropriately changed. Further, the form of contact between the rattling prevention convex part 72 and the rattling prevention concave part 74 may be line contact or point contact in addition to surface contact, or a plurality of surface contact, line contact and point contact. A combination of these contact forms may also be used.

10 ... Fuel tank 20 ... Pump case (parts in the fuel tank)
30 ... Upper pump case member 32 ... Lower pump case member 50 ... First engagement means 52 ... First engagement claw (first engagement projection, engagement projection)
54 ... 1st engagement hole (1st engagement recessed part, engagement recessed part)
70 ... rattle prevention means 72a ... inclined surface 72 ... rattle prevention convex portion 74 ... rattle prevention recess 74a ... inclined surface

Claims (4)

Between the two members arranged in the fuel tank, there is provided an engaging means comprising an engaging convex portion and an engaging concave portion that can be snap-fit coupled to each other by a mutual engagement utilizing elasticity to prevent the two members from coming off. A structure for connecting fuel tank parts,
A direction between the engaging convex portion and the engaging concave portion of the engaging means that opposes the pulling direction of the two members and intersects with the engaging / disengaging direction of the two members before displacement in the pulling direction of the two members. Provided with a rattling prevention means comprising a rattling prevention convex part and a rattling prevention concave part that abuts in a direction intersecting the engagement / disengagement direction of the two members due to displacement of the two members in the removal direction,
The two members are an upper pump case member and a lower pump case member obtained by vertically dividing a bottomed cylindrical pump case that accommodates and holds a fuel pump in a vertically placed state,
The fuel pump is supported by the lower pump case member,
The rattling prevention convex part of the rattling prevention means and the rattling prevention concave part abut each other in at least one direction crossing the engagement / disengagement direction of the two members due to displacement in the removal direction of the two members. An inclined surface is formed,
The lower pump case member is urged downward by the force of the fuel pump due to its own weight and the discharge fuel pressure, and the inclined surface of the rattling prevention convex portion of the rattling prevention means rattles. It is held in a state where the inclined surfaces of the anti-sticking recesses are in contact with each other.
A structure for connecting fuel tank internal parts. The fuel tank internal part coupling structure according to claim 1 ,
The rattling prevention convex part and the rattling prevention concave part are formed with tapered inclined surfaces that contact each other in both directions intersecting with the engagement / disengagement direction of the two members due to displacement of the removal direction of the two members. A structure for connecting fuel tank internal parts. A fuel tank internal parts coupling structure according to claim 1 or 2 ,
The coupling structure of the components in the fuel tank, wherein the engagement convex portion is formed on the upper pump case member and the engagement concave portion is formed on the lower pump case member. A fuel tank internal parts coupling structure according to claim 1 or 2 ,
The fuel tank coupling structure according to claim 1, wherein the engaging pump is formed on the lower pump case member, and the engaging recess is formed on the upper pump case member.

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