CN102032080B - fuel pump structure - Google Patents

Abstract

The object of the present invention is to provide a fuel pump structure with a detachable primary filter. The fuel pump structure of the present invention includes: a fuel pump main body (8A), which is detachably installed on the fuel tank and has a fuel suction port (67) extending along the axis (PJ) direction at the end; a sensor device (17 ), which is equipped with a detection portion (69) on the arm portion (68) extending radially from the fuel pump main body (8A); a connecting portion (74), which is installed on the fuel suction port (67) A primary filter (16), which has a filter portion (75) extending radially from the connecting portion (74), the primary filter (16) is detachably mounted on the fuel pump main body ( 8A) of the fuel inlet (67), and the extension direction of the filter part (75) of the primary filter (16) and the extension direction of the sensor device (17) are set to the same direction.

Description

fuel pump structure

technical field

The invention relates to a structure of a fuel pump.

Background technique

A fuel tank of a vehicle such as a motorcycle is equipped with a built-in fuel pump. Such a fuel pump is constituted by a pump main body, a sensor device (sender), and a primary filter, and has a structure in which these pump main body, sensor device, and primary filter are assembled integrally (see Patent Document 1).

Patent Document 1: Japanese Unexamined Patent Publication No. 2004-232572.

Conventionally, when maintaining the primary filter, it was necessary to remove the fuel pump from the fuel tank for maintenance.

However, the above-mentioned parts of the conventional fuel pump are assembled in an integrated manner. When maintaining each part, since they can only be cleaned in the state that they have been assembled on the fuel pump, it is difficult to adequately clean the parts. the problem of maintaining it.

If the primary filter is replaced, it can only be handled by replacing the fuel pump itself or the components assembled with the primary filter, thereby costing maintenance costs. Therefore, it is particularly desired to obtain a fuel pump structure capable of easily maintaining the primary filter whose mesh is unavoidably clogged due to long-term use.

Contents of the invention

Therefore, an object of the present invention is to provide a fuel pump with a detachable primary filter.

In order to achieve the above object, the fuel pump structure of the first solution of the present invention includes: a fuel pump main body (such as the fuel pump main body 8A in the embodiment), which is detachably mounted on the fuel tank (such as the fuel tank 1 in the embodiment) On the top and at the end, there is a fuel suction port (such as the fuel suction port 67 in the embodiment) extending in the direction of the axis (such as the axis PJ in the embodiment); a sensing device (such as the sensing device 17 in the embodiment), It is equipped with a detection part (such as the detection part 69 in the embodiment) on an arm part (such as the arm part 68 in the embodiment) extending radially from the fuel pump main body; a primary filter (such as the primary filter in the embodiment) device 16), which has a connecting portion (for example, the connecting portion 74 in the embodiment) mounted on the fuel suction port of the fuel pump main body and a filter portion extending radially from the connecting portion (for example, the filter portion in the embodiment 75), the fuel pump structure is characterized in that the primary filter is detachably mounted on the fuel suction port of the fuel pump main body through the connecting portion, and the filtration of the primary filter The extending direction of the arm portion and the extending direction of the arm portion of the sensing device are set to be the same direction.

The fuel pump structure according to the second aspect of the present invention is characterized in that the primary filter includes an engaging portion (such as the claw portion 80 in the embodiment) that engages with the fuel pump main body or the sensing device, and the The connection portion of the primary filter is connected to the fuel suction port of the fuel pump body, and the primary filter is engaged and fixed to the fuel pump body or the sensor device.

A fuel pump structure according to a third aspect of the present invention is characterized in that the connecting portion of the primary filter has a flange portion (for example, the flange portion 93 in the embodiment) extending in the radial direction of the fuel pump main body. , the flange portion is provided with a bolt penetration hole (such as the penetration hole 94 in the embodiment), and the sensing device body (such as the bottom wall 82 in the embodiment) covering the bottom surface of the fuel pump body (such as The sensing device main body 64 in the embodiment) has a connection hole (such as the connection hole 96 in the embodiment) provided on the outer periphery of the fuel suction port, and a bolt (such as the bolt 97 in the embodiment) is inserted through the bolt. The primary filter is attached to the fuel pump main body through a hole and the coupling hole.

A fuel pump structure according to a fourth aspect of the present invention is characterized in that the extension length of the arm portion of the sensor device and the extension length of the filter portion of the primary filter are set to be substantially the same length.

The fuel pump structure according to the fifth aspect of the present invention is characterized in that the fuel suction port is provided eccentrically from the center of the fuel pump body toward the sensor device side, and the connecting portion of the primary filter is provided with a There is a flange portion extending toward the center of the fuel pump body and fixed to the fuel pump body or the sensor device body.

A fuel pump structure according to a sixth aspect of the present invention is characterized in that the fuel suction port is provided eccentrically to the side opposite to the sensor device, and the primary filter connects the center of the fuel pump main body and the fuel suction port. A line of the port (for example, line L in the embodiment) is arranged on one side as a boundary, and a flange portion fixed to the fuel pump main body is provided at the connecting portion on the other side.

A fuel pump structure according to a seventh aspect of the present invention is characterized in that the engaging portion is a claw portion ( For example, the claw portion 80A in the embodiment has a tapered surface (for example, the tapered surface 98 in the embodiment) along one direction of the peripheral surface of the connecting portion.

A fuel pump structure according to an eighth aspect of the present invention is characterized in that the arm portion of the sensing device is provided with a restricting arm made of elastic material that restricts rotation of the primary filter in one direction (for example, in the embodiment, The limit arm 99).

The fuel pump structure according to the ninth aspect of the present invention is characterized in that an annular flange portion (for example, the annular flange portion 100 in the embodiment) is provided at the fuel suction port (for example, the fuel suction port 67A in the embodiment). ), the connection portion of the primary filter (such as the connection portion 74A in the embodiment) has a plurality of locking claws that are locked on the annular flange portion when the primary filter is installed (for example, the implementation way of extending the claws 103).

A fuel pump structure according to a tenth aspect of the present invention is characterized in that the outer peripheral surface of the annular flange portion is provided with a tapered protrusion whose upper surface gradually increases in one direction in the circumferential direction of the annular flange portion. (such as the protruding part 105 in the embodiment), the protruding part is located between the plurality of locking claws.

Invention effect

According to the first aspect of the present invention, the replacement of the primary filter can be carried out by detachably installing the primary filter on the fuel tank main body. The arms extend in the same direction, allowing the fuel pump to be easily inserted into the fuel tank.

According to the second aspect of the present invention, the primary filter can be fixed to the fuel pump main body or the sensor device.

According to the third aspect of the present invention, the primary filter can be detachably attached to the fuel pump main body or the sensor device using bolts.

According to the fourth aspect of the present invention, since the insertion operation into the fuel tank can be performed from one direction, the insertion operation is facilitated.

According to the fifth aspect of the present invention, by making the fuel suction port eccentric, it is possible to easily secure a mounting space for the flange portion.

According to the sixth aspect of the present invention, by making the fuel suction port eccentric and placing the primary filter on one side, it is possible to reduce the protruding amount of the primary filter to the outer periphery of the fuel pump main body and facilitate installation.

According to the seventh aspect of the present invention, the primary filter can be easily fixed to the fuel pump main body, and when the disposable filter is removed from the fuel pump main body, the claw portion can be easily removed from the claw along the tapered surface by rotating the primary filter. The fuel pump body is removed.

According to the eighth aspect of the present invention, the primary filter is positioned so as not to rotate relative to the fuel pump main body by the restricting arm, and the restricting arm is elastically deformed to allow the primary filter to rotate when the primary filter is removed.

According to the ninth aspect of the present invention, the primary filter can be locked to the fuel suction port by the locking claw, and compact installation can be achieved.

According to the tenth aspect of the present invention, the primary filter can be positioned with respect to the fuel pump main body in the circumferential direction, and if the primary filter is rotated when the primary filter is removed, since each locking claw gradually climbs over the protruding portion, the locking claws are locked. The locked state of the locking claw with respect to the annular flange portion is released, so that the primary filter can be easily detached from the fuel pump main body.

Description of drawings

FIG. 1 is an exploded perspective view of a fuel tank according to each embodiment of the present invention.

FIG. 2 is an enlarged view of an essential part of FIG. 1 .

FIG. 3 is an enlarged plan view of FIG. 2 .

FIG. 4 is a sectional view along the foot of FIG. 2 .

FIG. 5 is an enlarged view of an essential part of FIG. 4 .

FIG. 6 is a plan view corresponding to FIG. 3 of another embodiment.

Fig. 7 is a side explanatory view of main parts of another embodiment described above.

Fig. 8 is a side explanatory view of main parts of another embodiment described above.

Fig. 9 is an exploded perspective view of a fuel pump.

Fig. 10 is a schematic cross-sectional explanatory view of main parts of the first embodiment.

Fig. 11 is a perspective view of main parts around a fuel inlet in the first embodiment.

Fig. 12 is a perspective view of main parts around the connection part of the first embodiment.

FIG. 13 is a view corresponding to FIG. 10 of the second embodiment.

FIG. 14 is a diagram corresponding to FIG. 10 of the third embodiment.

FIG. 15 is an explanatory view showing the installation work state of FIG. 14 .

FIG. 16 is a view corresponding to FIG. 10 of the fourth embodiment.

Fig. 17 is a top view of Fig. 16 in which the primary filter is seen through.

FIG. 18 is an explanatory view showing the installation work state of FIG. 16 .

FIG. 19 is a view corresponding to FIG. 10 of the fifth embodiment.

Fig. 20 is a top view of Fig. 19 with the primary filter seen through.

Fig. 21 shows main parts of the sixth embodiment, wherein (a) is a front view; (b) is a top view; and (c) is a side view.

FIG. 22 is a view corresponding to FIG. 10 of the seventh embodiment.

Fig. 23 is a perspective view of a connection portion of an eighth embodiment.

24 is a cross-sectional explanatory view of a connection portion and a fuel intake port of an eighth embodiment.

Fig. 25 is a perspective view of an attached state of a connection portion and a fuel inlet of an eighth embodiment.

Explanation of reference signs

1 fuel tank

8A Fuel pump main body

17 Sensing device

64 Sensing device main body (sensing device main body)

67, 67A Fuel suction port

68 arm

69 Testing Department

74, 74A connection part

75 Filtration Department

80 Claw part (catch part)

82 Bottom wall (bottom surface)

93 Flange

94 Bolt penetration holes

96 connecting holes

97 bolts

98 Cone

99 Limiting arm

100 Ring flange

103 Extension claw (locking claw)

105 protrusion

J axis

PJ axis

L line

Detailed ways

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 6 .

For example, in the fuel tank 1 of a motorcycle shown in FIG. A recess 6 is formed in the upper half 2 , and a flat upper wall 7 is formed in the recess 6 .

As shown in FIGS. 1 to 3 , a circular insertion port 9 into which a fuel pump 8 is inserted is formed in the upper wall 7 . The insertion port 9 is formed at a position one step downward from the upper wall 7 via the stepped portion 10 . Around the insertion port 9, an engagement bracket 11 for locking a shutter 30 described later is welded and fixed. Specifically, the engaging bracket 11 is composed of an insertion seat 12 for receiving the bracket 30 and a fixing seat 13 for locking the baffle 30 , and the insertion seat 12 and the fixing seat 13 are divided into two parts around the insertion opening 9 .

The stepped portion 10 of the upper wall 7 of the fuel tank 1 includes a vertical wall 14 extending vertically downward from the upper wall 7 and a pump holding surface 15 of the fuel pump 8 extending horizontally from the vertical wall 14 and constituting the periphery of the insertion port 9 .

The fuel pump 8 is a so-called built-in type fuel pump 8 that is immersed in the fuel tank 1 and supplies the fuel in the fuel tank 1 to an injector (not shown). The fuel pump 8 includes a primary filter 16 for filtering impurities in the fuel in the fuel tank 1 and a sensor device 17 for measuring the liquid level of the fuel in a lower portion. The diameter of the upper part of the fuel pump 8 is formed larger than that of the lower part, and it is provided with a primary filter 16 and a sensor device 17 provided at the lower part inserted into the fuel tank 1. The upper mounting portion 18 supported by the pump holding surface 15 on the periphery of the port 9 is inserted.

On the upper wall 19 of the upper mounting portion 18 of the fuel pump 8, a fuel feeding pipe 20 is connected on one side along the configuration direction of the insertion seat 12 and the fixed seat 13 constituting the engaging bracket 11, and a connecting port is provided on the other side. Coupling 21 of the illustrated connector. The fuel feed pipe 20 is extended to a position beyond the outer peripheral portion of the upper wall 19 of the upper mounting portion 18 of the fuel pump 8 on the outside and directed to the front end side of the legs 32 and 33 of the baffle 30 described later, and the coupling 21 is engaged with the The inner side of the bracket 11 , that is, between the insertion seat 12 and the fixing seat 13 points to the main body 31 of the baffle plate 30 described later.

On the upper wall 19 of the upper mounting portion 18 of the fuel pump 8, a pair of upper mounts are installed on the side away from the fuel feeding pipe 20 and the coupling 21 in a manner along the arrangement position of the fuel feeding pipe 20 and the coupling 21. The upper wall 19 of the portion 18 stands upright and the guide portions 22 and 22 abut against the outer edge portion of the baffle plate 30 .

The baffle plate 30 is an elastically deformable plate-shaped member, and is fixed to the pump holding surface 15 of the fuel tank 1 in a state where the upper mounting portion 18 of the fuel pump 8 inserted from the insertion port 9 of the fuel tank 1 is pressed against the pump holding surface 15 of the fuel tank 1 . Engage the bracket 11 and support the fuel pump 8 on the fuel tank 1 .

Specifically, the baffle 30 is provided with a main body 31 corresponding to the side of the fixing seat 13 of the engaging bracket 11 , extends in the same direction from both ends of the main body 31 at intervals, and has a front end corresponding to the insertion seat 12 . The part of " U " font of a pair of pin 32,33. The legs 32 and 33 extend from the base on the side of the main body 31 toward the front end with substantially the same length and width. Both the front ends of the legs 32 and 33 are bent upward, one leg 32 has a bent portion 34 , and the other leg 33 has a positioning bent portion 35 extending upward from the bent portion 34 .

Insertion holes 29 for positioning bolts 47 are formed in the positioning bent portion 35 . The inner edge of the base of each leg 32, 33 is inclined inwardly to increase its width along the direction of increasing width and is connected to the main body 31. On the base side of each leg 32, 33 of the main body 31, protrudingly provided with the direction of the foot. The locking pieces 36 protrude from opposite sides of the front ends of the portions 32 and 33 and are shifted outward.

Here, the protruding length of the locking piece 36 is set so as to satisfy the requirement that when the bent portion 34 and the positioning bent portion 35 of the leg portions 32 and 33 are inserted into the first openings 42 and 43 of the insertion base 12 Although the locking pieces 36 are not locked to the second openings 53, 54 of the fixing seat 13, the bending parts 34 and the positioning bending parts 35 of the legs 32, 33 will abut against the supporting pieces 44, 45 of the insertion seat 12. The locking piece 36 is locked to the second openings 53 , 54 of the fixing seat 13 at the abutting position from before.

The rear edge of the main body 31 of the baffle 30 is divided into three parts, the two end sides and the central side by two cutouts 37, and side curved parts 38, 38 are formed on the two end sides, and the edge parts are all erected on the central side. The cross-section is an L-shaped central curved portion 39 . A locking hole 40 corresponding to the claw piece 55 of the fixing seat 13 of the locking bracket 11 is formed on the upper surface of the central curved portion 39 .

The insertion seat 12 of the engaging bracket 11 has a base 41 fixed to the fuel tank 1 and support pieces 44 and 45 erected from the insertion opening 9 sides at both ends of the base 41 .

The supporting pieces 44 and 45 have first openings 42 and 43 which are respectively inserted into the legs 32 and 33 of the flapper 30 from the bent part 34 and the positioning bent part 35 to lock them in a swingable state. The supporting piece 45 further has a positioning piece 46 that extends upward and coincides with the positioning bent portion 35 of the leg portion 33 of the baffle plate 30 . Insertion holes 48 for positioning bolts 47 are formed in the positioning piece 46 , and weld nuts 49 into which the positioning bolts 47 are screwed are welded and fixed inside the positioning piece 46 (see FIG. 3 ).

The fixing seat 13 of the engaging bracket 11 includes a base body 50 fixed to the fuel tank 1 and fixing pieces 51 , 52 erected upward from the insertion opening 9 sides at both ends of the base body 50 . Second openings 53 , 54 into which the locking pieces 36 of the legs 32 , 33 of the baffle 30 are inserted and locked are formed on the fixing pieces 51 , 52 . Specifically, the second openings 53 , 54 lock the locking pieces 36 , 36 of the legs 32 , 33 so that the first opening 42 of the insertion seat 12 of the engagement bracket 11 is locked. The baffle plate 30 of , 43 is elastically deformed in such a way that it protrudes upward, and the upper mounting part 18 of the fuel pump 8 is slid and fixed in a state where the pump holding surface 15 on the periphery of the insertion port 9 of the fuel tank 1 is urged. Locking pieces 36 , 36 of the legs 32 , 33 of the baffle 30 .

Here, as shown in FIG. 4 , in a state where the upper mounting portion 18 of the fuel pump 8 is pressed against the pump holding surface 15 of the fuel tank 1 , the first openings 42 and 43 of the insertion seat 12 of the bracket 11 are engaged. And the second openings 53, 54 of the fixing seat 13 are located below the upper wall 19 where the fuel pump 8 and the baffle 30 are in contact, so that the baffle 30 can be deformed by protruding the baffle 30 upward. and fixed. It should be noted that, although the case where both the first openings 42, 43 and the second openings 53, 54 are located below the upper wall 19 in contact with the fuel pump 8 and the baffle 30 has been described, as long as the At least any one side of is located below.

The central part of the base body 50 of the fixing seat 13 is formed with a claw piece 55 standing upright on the edge of the opposite side of the insertion port 9. The fixed position is locked in the locking hole 40 of the baffle 30 .

In addition, at an appropriate fixed position of the fuel pump 8, the positioning bent portion 35 of the foot portion 33 of the baffle plate 30 overlaps with the positioning piece 46 of the supporting piece 45 of the insertion seat 12 of the engaging bracket 11, and the positioning and bending portion 35 penetrates The hole 29 is consistent with the penetration hole 48 of the positioning piece 46. Since the positioning bolt 47 can be inserted into each penetration hole 29, 48 of the overlapping portion, if the positioning bolt 47 is firmly fixed to the welding nut 49, it can be ensured. The fuel pump 8 is fixed without displacement.

As shown in FIG. 5 , the upper mounting portion 18 of the fuel pump 8 includes an annular portion 23 abutting on the pump holding surface 15 of the fuel tank 1 , and a flange portion 24 protruding outward as an upper portion of the annular portion 23 . . An annular seal 60 having a circular cross section is interposed between the outer peripheral surface 25 of the annular portion 23 of the fuel pump 8 , the pump holding surface 15 of the upper wall 7 of the fuel tank 1 , and the vertical wall 14 of the stepped portion 10 . Further, between the outer peripheral surface 26 of the flange portion 24 of the fuel pump 8 and the upper wall 7 of the fuel tank 1, an annular seal member 61 having a cross-sectional shape branched at the lower side is provided.

The seal member 61 includes an outer flange portion 62 that enters between the outer peripheral surface 26 of the flange portion 24 of the fuel pump 8 and the outer surface of the upper wall 7 of the fuel tank 1 , and an outer peripheral surface 26 that enters the flange portion 24 of the fuel pump 8 . and the inner flange portion 63 between the vertical wall 14 of the stepped portion 10 .

Therefore, when the fuel pump 8 is installed in the fuel tank 1, the primary filter 16, the floating body 65, and the sensor device 17 of the fuel pump 8 are inserted from above the insertion port 9 of the fuel tank 1, and the fuel pump 8 The lower surface of the annular portion 23 of the upper mounting portion 18 abuts on the pump holding surface 15 of the upper wall 7 of the fuel tank 1 .

Then, hold the side curved portion 38 and the central curved portion 39 of the main body 31 of the baffle 30, and respectively insert and lock the curved portions 34 and the positioning curved portions 35 of the feet 32, 33 of the baffle 30 until they are inserted. After the first openings 42, 43 of the seat 12, the main body 31 of the baffle 30 is pressed into the position of the solid line from the dotted line position in FIG. The locking pieces 36 , 36 at the bases of the feet 32 , 33 slide slightly to opposite sides of the insertion direction of the feet 32 , 33 and are locked in the second openings 53 , 54 of the fixing seat 13 .

Then, the positioning bolt 47 is firmly fixed on the welding nut 49 , so that the fuel pump 8 can be fixed at a proper position without misalignment.

Hereinafter, an example in which the baffle 30' is used instead of the baffle 30 of the first embodiment will be described with reference to Figs. 6 to 8 .

This embodiment is a structure using the engagement bracket 11' and the shutter 30' modified from the engagement bracket 11 and the shutter 30 of the above-mentioned embodiment. Since the structure other than the parts related to the engaging bracket 11' and the shutter 30' is the same as that of the first embodiment, the same parts are given the same reference numerals and their descriptions are omitted.

The engaging bracket 11' is composed of a divided insertion seat 12' and a fixing seat 13'. Although the insertion base 12' includes the base body 41 and the support pieces 44, 45, the positioning piece 46 of the first embodiment is not formed. First openings 42 , 43 are formed in the support pieces 44 , 45 . The fixing seat 13' has a pair of mounting seats 70 on the base body 50', and a stud bolt 73 to which a nut 71 is fastened is mounted on the inner side of the mounting seat 70.

The baffle 30' is a member that extends the legs 32', 33' from the main body 31'. Although the front ends of the legs 32', 33' are provided with curved parts 34, 34, they are not formed on the legs 33'. There is the positioning bent portion 35 of the first embodiment. The legs 32', 33' extend directly from the main body 31' at the original width, without the locking piece 36 of the first embodiment. Insertion holes 72 for stud bolts 73 are formed at corners of the legs 32', 33' and the main body 31'. The nut 71 is connected with the stud bolt 73 from above the mounting seat 70 of the fixing seat 13'.

Therefore, in this embodiment, when the fuel pump 8 is attached to the fuel tank 1, the primary filter 16, the floating body 65, and the sensor device 17 of the fuel pump 8 are inserted from above the insertion port 9 of the fuel tank 1, And the lower surface of the annular portion 23 of the upper mounting portion 18 of the fuel pump 8 abuts against the pump holding surface 15 of the upper wall 7 of the fuel tank 1 .

Then, after the bent parts 34, 34 of the legs 32', 33' of the baffle 30' are respectively inserted and locked into the first openings 42, 43 of the insertion seat 12', the main body 31 of the baffle 30' Press down to make the baffle 30' bend in an upwardly protruding manner, and insert the feet 32', 33' of the baffle 30' and the penetration holes 72, 72 of the mounting seat 70 at the corners of the main body 31'. Protruding stud bolts 73, 73 and nuts 71, 71 can be connected.

Although the fuel pump 8 is mounted on the fuel tank 1 in a detachable manner from above through the above-mentioned baffles 30, 30', as shown in FIGS. The fuel pump main body 8A has a cylindrical fuel suction port 67 extending in the direction of the axis PJ.

The fuel pump 8 includes the upper mounting portion 18, and includes a cylindrical sensor body 64 that covers the bottom surface of the fuel pump 8A and is detachably mounted around the fuel pump body 8A. The sensor device 17 is constituted by the radially extending arm portion 68 of the fuel pump 8 and the detection portion 69 at the front end of the arm portion 68 . The fuel pump 8 includes a primary filter 16 composed of a connecting portion 74 attached to the fuel intake port 67 of the fuel pump body 8A, and a filter portion 75 extending from the connecting portion 74 in the radial direction of the fuel pump body 8A.

The primary filter 16 is detachably mounted on the fuel inlet 67 of the fuel pump main body 8A through the connecting portion 74, and the extending direction of the filter portion 75 of the primary filter 16 and the extending direction of the arm portion 68 of the sensing device 17 are set as same direction. In addition, the extension length of the arm part 68 of the sensor device 17 and the extension length of the filter part 75 of the primary filter 16 are set to substantially the same length. It should be noted that, in FIG. 9 , in the sensor device 17 , the floating body 65 is supported by the arm 66 in a swingable state.

Specifically, as shown in FIGS. 10 and 12 , the primary filter 16 includes a cylindrical connection portion 74 on an upper surface 76 of a filter portion 75 . The connecting portion 74 has a stepped portion 77 , and the stepped portion 77 is connected to the communicating hole 78 . On the outer peripheral surface 79 of the connecting portion 74, a pair of cylindrical sensor valves engaged with the fuel pump main body 8A are provided in a direction along the extending direction of the primary filter 16 and the arm portion 68 of the sensor device 17. The claw portion 80 of the device main body 64 . The claws 80, 80 have an inclined surface 81 inclined downward in the direction of the axis J of the connecting portion 74 with respect to the insertion direction of the fuel suction port 67 of the fuel pump main body 8A. The inclined surface 81 is right triangle.

As shown in FIGS. 10 and 11 , the fuel suction port 67 of the fuel pump main body 8A is a cylindrical member protruding through the bottom wall 82 of the sensor device body 64 of the sensor device 17 . It fits inside the connecting portion 74 of the primary filter 16 in the state of the outer peripheral surface 84 , and abuts against the bottom surface 85 of the stepped portion 77 . The O-ring 83 is tightly fitted between the inner peripheral surface 86 of the connecting portion 74 of the primary filter 16 and the outer peripheral surface 84 of the fuel suction port 67 to seal the two. Here, the fuel intake port 67 is eccentric from the center of the fuel pump main body 8A toward the sensor device 17 side.

The bottom wall 82 of the baffle body 64 of the baffle 17 is provided with a pair of locking walls 87, 87 in a direction straight along the extension direction of the primary filter 16 and the arm portion 68 of the sensing device 17, so that the side filter 16 places are in contact with the outer peripheral surface 79 of the connecting portion 74 . Each locking wall 87 is provided with an engaging hole 88 for receiving and locking the claw portion 80 of the connecting portion 74 of the primary filter 16 . Accordingly, when the connection portion 74 of the primary filter 16 is inserted into the fuel suction port 67 of the fuel pump main body 8A from the outside, the primary filter 16 is fixed to the fuel pump main body 8A.

According to the first embodiment, in order to replace and maintain the primary filter 16, if the baffles 30, 30' are removed and the fuel pump 8 is removed from the fuel tank 1, since the primary filter 16 is detachable from the fuel pump main body 8A Yes, so the filter 16 can be replaced once. In addition, since the extension direction of the filter portion 75 of the primary filter 16 is set in the same direction as the extension direction of the arm portion 68 of the sensor device 17, and the lengths of the two are set to be substantially the same, it is possible to maintain, After replacing the filter 16 once, the insertion operation of the fuel pump 8 into the fuel tank 1 can be performed from one direction side, thereby facilitating the operation.

In addition, since each claw portion 80 of the connection portion 74 of the primary filter 16 is engaged with each engaging hole 88 of the locking wall 87 of the fuel suction port 67 of the fuel pump main body 8A, the connection portion 74 can be fixed to the The fuel suction port 67, so the primary filter 16 can be fixed to the fuel pump main body 8A by one operation.

Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 1 to 9 and with reference to FIG. 13 . In this embodiment, among the locking walls 87 and 87 of the first embodiment, the locking wall 87 on the side of the sensor device 17 is set to extend from the peripheral wall 91 of the sensor device main body 64 to the other locking wall 87 over a long span. The protruding end is formed as an L-shaped locking wall 90 . An engaging hole 88 is formed at a position corresponding to the locking wall 87 on the vertical wall of the locking wall 90 . Here, by providing the locking wall 90 further outside, the fuel suction port 67 is arranged eccentrically on the sensor device 17 side accordingly.

Also in the present embodiment, by engaging the claws 80, 80 of the connecting portion 74 of the primary filter 16 with the engaging holes 88, 88 of the locking wall 87 and the locking wall 90, it is possible to simply perform the operation with one operation. When the primary filter 16 is fixed to the fuel pump main body 8A and the primary filter 16 is detached, since the extension length of the locking wall 90 can be increased correspondingly, the primary filter 16 can be easily detached. . It should be noted that, since other configurations and functions are the same as those of the first embodiment, the same reference numerals are assigned to the same parts and their descriptions are omitted.

Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. 1 to 9 and based on FIGS. 14 and 15 . In this embodiment, instead of the locking walls 87 and 87 of the first embodiment, the outer peripheral surface 79 of the connecting portion 74 of the primary filter 16 is provided with a radial direction of the fuel pump body 8A, specifically, a radial direction of the fuel pump body 8A. Corresponding to the flange portion 93 having the bolt insertion hole 94 extending in the center of the fuel pump main body 8A, the fuel suction port serving as the bottom wall 82 of the sensor device main body 64 in this embodiment is located on the bottom surface of the fuel pump main body 8A. The outer periphery of 67 is provided with a mounting seat 95 having a coupling hole 96 . Here, the flange portion 93 extends to a position where the bolt insertion hole 94 protrudes from the side edge of the filter portion 75 .

The primary filter 16 is attached to the fuel pump main body 8A by passing the bolt 97 into the attachment hole 96 and the bolt insertion hole 94 and attaching the flange portion 93 to the mounting seat 95 .

Here, the fuel intake port 67 is provided eccentrically from the center of the fuel pump main body 8A toward the sensor device 17 side.

Also in this embodiment, the primary filter 16 can be easily attached to and detached from the fuel pump 8A using the bolts 97, and since the bolts 97 are located near the center of the fuel pump main body 8A, the bolts 97 are easily attached and detached. . Of course, as shown in FIG. 15 , as in the above-mentioned embodiment, since the extending direction of the filter portion 75 of the primary filter 16 is set to be the same direction as the extending direction of the arm portion 68 of the sensor device 17 and the two are The lengths are set to be substantially the same, so the insertion operation of the fuel pump 8 from the insertion port of the fuel tank 1 can be performed from one direction side, thereby facilitating the operation. In addition, since other structures and functions are the same as those of the first embodiment, the same parts are given the same symbols and their descriptions are omitted.

Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. 1 to 10 and based on FIGS. 16 to 18 . In this embodiment, the positions of the fuel suction port 67 and the locking walls 87, 87 of the fuel pump 8A in the embodiment shown in FIG.

Therefore, as shown in FIG. 17 , according to the present embodiment, each claw portion 80 of the connecting portion 74 of the primary filter 16 can be locked to the engaging hole of each locking wall 87 of the fuel suction port 67 of the fuel pump main body 8A. 88 , and in a state where the connecting portion 74 is fixed to the fuel suction port 67 , the outward protrusion of the primary filter 16 from the fuel pump main body 8A is minimized.

Therefore, as shown in FIG. 18, by reducing the amount of extension of the filter portion 75 of the primary filter 16, when the fuel pump 8 is inserted from the insertion port 9 of the fuel tank 1, the primary filter 16 does not constitute an obstacle. The state makes insertion easier. In addition, since other structures and functions are the same as those of the first embodiment, the same parts are given the same symbols and their descriptions are omitted.

Hereinafter, a fifth embodiment of the present invention will be described with reference to FIGS. 1 to 9 and based on FIGS. 19 and 20 . In this embodiment, like the fourth embodiment, the position of the fuel suction port 67 of the fuel pump body 8A is eccentrically provided from the center of the fuel pump body 8A to the side opposite to the sensor device 17 . In addition, the primary filter 16 is offset to one side with the line L connecting the center of the fuel pump main body 8A and the fuel suction port 67 as a boundary, and the bolt insertion hole 94 is positioned at the connection of the primary filter 16 on the other side. The portion 74 is fixed to the flange portion 93 of the fuel pump main body 8A at a position extending outward from the outer edge of the primary filter 16 in a direction along the line L. A mount 95 is provided on the bottom wall 82 of the sensor device main body 64 corresponding to the flange portion 93 .

Then, the connecting portion 74 of the primary filter 16 is mounted to the fuel suction port 67 of the fuel pump main body 8A through the O-ring 83, and the connection hole 96 of the mounting seat 95 of the sensor device main body 64 is connected to the flange portion 93. The bolt penetration holes 94 are aligned, and then the flange portion 93 is coupled to the mounting seat 95 by penetration of bolts 97, thereby fixing the primary filter 16 to the fuel pump main body 8A.

Therefore, according to the present embodiment, as in the fourth embodiment, since the position of the fuel suction port 67 of the fuel pump body 8A is eccentrically provided from the center of the fuel pump body 8A to the side opposite to the sensor device 17, the primary filtration is reduced. The protrusion amount of the filter part 75 of the filter 16 can facilitate the insertion operation of the fuel pump 8 from the insertion port 9 of the fuel tank 1 without the primary filter 16 being an obstacle.

In addition, the primary filter 16 is offset to one side with the line L connecting the center of the fuel pump body 8A and the fuel suction port 67 as a boundary, and is fixed to the fuel pump body at the connecting portion 74 of the primary filter 16 on the other side. The flange portion 93 of 8A extends outward from the outer edge of the primary filter 16 in the direction along the line L, and is provided with a penetration hole 94 at this portion, so that the primary filter 16 can be easily removed without obstructing the state. The fastening operation of the bolt 97 is performed.

Therefore, even in the structure to control the protrusion of the primary filter 16, the mounting structure by the flange portion 93 can be adopted without using the locking wall 87 as shown in FIG. 16 of the fourth embodiment. It should be noted that, since other configurations and functions are the same as those of the first embodiment, the same reference numerals are assigned to the same parts, and description thereof will be omitted.

Hereinafter, a sixth embodiment of the present invention will be described with reference to FIGS. 1 to 10 and with reference to FIG. 21 . The present embodiment is an improved structure of the claw portion 80 provided in the connection portion 74 of the primary filter 16 as represented by the first embodiment. FIG. 21( a ) is a front view of the connection portion 74 provided with the improved claw portion 80A, FIG. 21( b ) is a plan view of FIG. 21( a ), and FIG. 21( c ) is a side view. This embodiment is applicable not only to the first embodiment but also to all the embodiments including the claw portion 80 described above.

As shown in FIG. 21( a), like the claw portion 80 of the first embodiment shown in FIG. This inclined surface 81A is a tapered surface 98 that gradually increases from the outer peripheral surface 79 of the connecting portion 74 along one direction (clockwise direction in this embodiment) of the peripheral surface of the connecting portion 74 in plan view.

In this embodiment, since the inclined surface 81A is provided on the claw portion 80A, the engaging hole 88 that can be smoothly engaged with the locking wall 87 with a small force in the upward direction is guided by the inclined surface 81A. The filter 16 is easily fixed to the fuel pump main body 8A, and when the primary filter 16 is removed from the fuel pump main body 8A, it is possible to follow the tapered surface 98 by rotating the primary filter 16 in the clockwise direction of FIG. 21( b ). The primary filter 16 can be easily detached from the fuel pump main body 8A by detaching the claw portion 80A from the engaging hole 88 of the locking wall 87 in the horizontal direction.

Hereinafter, a seventh embodiment of the present invention will be described with reference to FIG. 1 to FIG. 10 , and FIG. 21( a ), ( b ) and based on FIG.

This embodiment is a structure in which a restricting arm 99 is provided on the arm portion 68 of the sensing device 17 of the first embodiment shown in FIG. 10 provided with the claw portion of FIG. 22 . It is made of elastic material (rubber, etc.) at the position where the orbital trajectory at 16 o'clock interferes.

In a state where the claw portion 80A of the connecting portion 74 of the primary filter 16 is accommodated and engaged with the engaging holes 88 of a pair of locking walls 87 arranged on both sides of the fuel suction port 67 of the fuel pump main body 8A, the restricting arm 99 The side edge of the filter part 75 of the primary filter 16 is abutted to restrict rotation of the primary filter 16 in one direction (right direction in FIG. 21( b )).

According to the present embodiment, after inserting the primary filter 16 into the fuel inlet 67 , by turning it clockwise until it comes into contact with the restricting arm 99 , the primary filter 16 can be attached to where the claw portion 80A is accommodated in the engaging hole 88 . Proper location, thus easy to operate.

In addition, when the primary filter 16 is detached from the fuel pump main body 8A, if the primary filter 16 is rotated further to the right, the restricting arm 99 is elastically deformed and the rotation of the primary filter 16 is allowed, and the claw portion begins to pass at the timing of the rotation. The tapered surface 98 of 80A presses the claw portion 80A against the edge of the engaging hole 88 and presses the locking wall 87, so the claw portion 80A is easily disengaged from the engaging hole 88, so that the primary filter 16 can be easily removed from the fuel. The pump body 8A is removed. In addition, since other structures and functions are the same as those of the first embodiment, the same parts are assigned the same symbols and their descriptions are omitted.

Hereinafter, an eighth embodiment of the present invention will be described with reference to FIGS. 1 to 10 and based on FIGS. 23 to 25 . As represented by the first embodiment, the present embodiment is an improved connection structure based on the connection portion 74 of the primary filter 16 and the claw portion 80 of the fuel suction port 67 of the fuel pump main body 8A. Therefore, the present embodiment can be applied to a plurality of embodiments including the above-mentioned mounting structure.

As shown in FIGS. 23 and 24 , an annular flange portion 100 is provided on the outer peripheral surface 84 of the fuel suction port 67A of the fuel pump main body 8A. In addition, the connecting portion 74A of the primary filter 16 is provided with an annular peripheral wall portion 102 along the outer peripheral surface 79 on the upper edge 101 of the connecting portion 74 of the first embodiment shown in FIG. There are four extended claws 103, . . . The extension claw portion 103 is locked to the annular flange portion 100 of the fuel inlet 67A, and on the lower side of the annular flange portion 100, the upper end edge 101 of the connection portion 74A and the inner surface of the peripheral wall portion 102 and the inner surface of the fuel inlet 67A are connected. An attachment portion for the O-ring 83 is formed between the outer peripheral surfaces 84 .

As shown in FIG. 25 , on the outer peripheral surface 104 of the annular flange portion 100, a tapered protrusion 105 whose upper surface gradually rises toward one direction (left direction) in the circumferential direction of the annular flange portion 100 is provided. The protrusion 105 is located between the plurality of extension claws 103 . The height of the protruding portion 105 is set to a height at which the extending claw portion 103 is detached from the annular flange portion 100 when the highest portion reaches the extending claw portion 103 .

Therefore, according to the present embodiment, the primary filter 16 can be positioned in the circumferential direction with respect to the fuel pump main body 8A, and when the primary filter 16 is removed, the primary filter 16 can be positioned to the right when viewed from above. Rotate in the direction of rotation, the inside of each extension claw 103, ... will gradually open over the protruding portion 105, thereby releasing the locking state of the extension claw 103 to the annular flange 100, so the primary filter 16 can be easily installed. Remove it from the fuel pump main body 8A.

In addition, this invention is not limited to the said embodiment, For example, it is applicable also to the fuel tank of various vehicles other than the fuel tank of a motorcycle.

In addition, although the case where the engaging portion of the primary filter 16 is fixed to the locking wall 87 and the mounting seat 95 of the sensor device main body 64 has been described as an example, the primary filter 16 may be provided on the fuel pump main body 8A. The locking wall 87 and the mounting seat 95 are used to fix the primary filter 16 to the fuel pump main body 8A.

Claims (10)

1. A fuel pump structure comprising: The main body of the fuel pump is detachably installed on the fuel tank and has a fuel suction port extending along the axial direction at the end; a sensing device having a detection unit on an arm extending radially from the fuel pump main body; a primary filter having a connecting portion attached to the fuel suction port of the fuel pump main body and a filter portion radially extending from the connecting portion, The fuel pump structure is characterized in that, The primary filter is detachably mounted on the fuel suction port of the fuel pump body through the connecting portion, and the extending direction of the filtering portion of the primary filter and the sensor device The extending direction of the arm portion is set to be the same direction, In the sensing device, the floating body is supported by the arm in a swingable state. 2. The fuel pump structure according to claim 1, wherein: The primary filter includes an engaging portion that is engaged with the fuel pump main body or the sensing device, and by connecting the connecting portion of the primary filter to the fuel suction port of the fuel pump main body, And the primary filter is engaged and fixed on the fuel pump main body or the sensing device. 3. The fuel pump structure according to claim 1, wherein: The connection portion of the primary filter has a flange portion extending in a radial direction of the fuel pump body, and the flange portion is provided with a bolt insertion hole, and covers a sensor on a bottom surface of the fuel pump body. The device main body has a fastening hole provided on the outer periphery of the fuel suction port, and the primary filter is attached to the fuel pump main body by passing a bolt through the bolt insertion hole and the fastening hole. 4. The fuel pump structure according to claim 1, wherein: An extension length of the arm portion of the sensor device and an extension length of the filter portion of the primary filter are set to substantially the same length. 5. The fuel pump structure according to claim 1, wherein: The fuel suction port is eccentrically arranged from the center of the fuel pump body to the side of the sensor device, and the connection part of the primary filter is provided with a fuel pump extending toward the center of the fuel pump body and fixed on the fuel pump. The flange part on the pump body or the sensor body. 6. The fuel pump structure according to claim 1, wherein: The fuel suction port is eccentrically arranged on the opposite side of the sensor device, and the primary filter is arranged on one side and on the other side with a line connecting the center of the fuel pump main body and the fuel suction port as a boundary. A flange portion fixed to the fuel pump main body is provided on the connecting portion. 7. The fuel pump structure according to claim 2, wherein: The engaging portion is a claw portion inclined downward in an insertion direction along the axial direction of the connecting portion, and the claw portion has a tapered surface along one direction of the peripheral surface of the connecting portion. 8. The fuel pump structure according to claim 7, wherein: The arm portion of the sensing device is provided with a restricting arm made of elastic material that restricts rotation of the primary filter in one direction. 9. The fuel pump structure according to claim 1, wherein: An annular flange portion is provided at the fuel intake port, and the connection portion of the primary filter includes a plurality of locking claws that are engaged with the annular flange portion when the primary filter is attached. 10. The fuel pump structure of claim 9, wherein: The outer peripheral surface of the annular flange portion is provided with a tapered protruding portion whose upper surface gradually increases toward one direction of the circumferential direction of the annular flange portion, and the protruding portion is located between the plurality of locking claws .

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