JP4613114B2 - Fuel hose mounting structure - Google Patents

Description

  The present invention relates to a fuel hose mounting structure in a scooter type vehicle in which a fuel tank is disposed on a low floor type floor.

  As an example of the fuel hose mounting structure, the fuel hose heading from the fuel tank to the power unit is fixed to the rear tube of the vehicle body frame by the first clamp rubber at the middle part, and the fuel hose stay by the second clamp rubber at the end part side. A fixed one is known (for example, see Patent Document 1).

JP 2004-183538 A

  However, in Patent Document 1, since the first clamp rubber is fixed to the rear tube in the vehicle body frame separate from the fuel tank, in order to make the deflection of the fuel hose constant, the stay that fixes the clamp rubber is fixed. Therefore, it is necessary to increase the accuracy of the welding position, which increases the cost.

  Also, since the engine is swung with respect to the frame, if a part of the fuel hose is fixed to the frame and the other part is fixed to the engine side, the hose on the engine side of the hose is caused by the swinging of the engine. Variation occurs in the distance between the fixed portion and the fixed portion on the frame side, and is easily affected by the variation. In addition, since both clamp rubbers are tube-shaped, it is necessary to pass the clamp rubber through the fuel hose in advance before wiring the fuel hose. It is difficult to improve.

  An object of the present invention is to solve the above-described problems, and to provide a fuel hose mounting structure capable of performing a constant wiring and improving workability.

In order to achieve the above object, the invention according to claim 1 is a scooter type vehicle having a low floor type floor, a fuel tank arranged on the floor, and a power unit supported swingably at the rear of the vehicle body. After extending the fuel hose connected to the fuel pump provided in the fuel tank toward the rear and one side of the vehicle , a first hose fixing member is attached to the flange provided on the rear side of the fuel tank. The fuel tank is assembled so as to face the other side of the rear portion of the fuel tank, and is piped in the left-right direction behind the fuel tank. Further, a second hose fixing member is provided on the other side of the cylinder head of the power unit. Assembling so as to face upward, the end is connected to an injector provided in the power unit ,
In the fuel hose, the clamp rubber is located at a position between a connection portion with the fuel pump and the first hose fixing member and on a concave surface provided on the upper surface of the fuel tank. Is characterized by being assembled alone .

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the first hose fixing member and the second hose fixing member hold the fuel hose via a clamp rubber. It is characterized by.
According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the first hose fixing member protrudes from a C-shaped clamp rubber holding portion and a C-shaped end portion. It has the 1st board part and the 2nd board part which were fabricated, and is fixed to the flange part by pinching and holding the flange part of the fuel tank with the 1st board part and the 2nd board part. It is characterized by that.
According to a fourth aspect of the invention, in addition to the configuration of the third aspect of the invention, the first plate portion and the second plate portion have screw holes for inserting bolts, and the second plate portion further includes The first hose fixing member is inserted into the screw hole of the second plate portion from the screw hole of the first plate portion, and the nut is fixed to the nut. It is fixed to the flange portion by screwing.

The invention described in claim 5 is characterized in that, in addition to the configuration of the invention described in claim 3 or 4 , the clamp rubber has a slit in the cylinder direction of the fuel hose.

According to the fuel hose mounting structure of the first aspect, the fuel hose is assembled to the flange portion provided in the rear portion of the fuel tank, and the end portion is connected to the injector provided in the power unit. As a result, the fuel hose can be routed with a constant deflection by the support portion on the fuel tank side and the support portion on the power unit side. In addition, since the fuel hose is routed along the swing axis of the vehicle body because it is piped in the left-right direction behind the fuel tank, deformation of the hose can be reduced. In addition, it is possible to route the fuel hose to the fuel tank in a non-contact manner by assembling the clamp rubber alone to the fuel hose outside the fuel tank, so that the fuel hose does not interfere with the fuel tank. it can.

According to the fuel hose mounting structure of the second aspect, the fuel hose can be elastically supported via the clamp rubber.
According to the fuel hose mounting structure of the third aspect, the flange portion is sandwiched and positioned by the first plate portion and the second plate portion.
According to the fuel hose mounting structure of the fourth aspect, since the bolt is fastened to the nut fixed to the hose fixing member, workability is good.

According to the fuel hose mounting structure of claim 5, when assembling the hose fixing member to the fuel hose, the fuel hose is assembled while the clamp rubber is unfolded by opening the slit, and then assembled by being sandwiched between the hose fixing members. I do. For this reason, it is not necessary to pass the clamp rubber through the fuel hose in advance before assembling the connector of the fuel hose as in the prior art, so that workability can be improved and productivity can be improved. .

DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a fuel hose mounting structure according to the present invention will be described in detail with reference to the drawings.
1 to 5 show a first embodiment of the present invention. FIG. 1 is a left side view of a vehicle equipped with a fuel hose mounting structure according to the present invention, and FIG. 2 is a diagram of the vehicle shown in FIG. FIG. 3 is an external perspective view of FIG. 2, and FIG. 4 is an exploded perspective view for explaining the assembly relationship of each part of the hose fixing member used in the fuel hose mounting structure according to the present invention. FIG. 5 is a single cross-sectional view of the clamp rubber shown in FIG. In the following description, “front”, “rear”, “left”, and “right” are described according to the direction seen from the driver.

  As shown in FIG. 1, the vehicle 10 includes a front frame 12, a pair of middle frames 13 extending horizontally rearward from the lower ends of the front frames 12, and a pair of rearwardly disposed middle frames 13. A frame 11 including a seat rail 14 is provided. The front fork 16 attached to the head pipe 15 at the front end of the front frame 12, a handle 17 coupled to the upper portion of the front fork 16, and a front fender 18 attached to the front fork 16 are provided. .

  A front wheel 19 attached to the lower portion of the front fork 16, a fuel tank 20 assembled between the middle frames 13, and an engine 21 attached to the lower portion of the joint between the front frame 12 and the seat rail 14 A power unit 23 including a transmission 22 is provided. Further, a bracket 25 swingably attached to the first swing shaft 24 at the rear lower portion of the seat rail 14 and a swing arm swingably attached to the second swing shaft 26 at the rear end portion of the bracket 25. 27.

  Further, a rear wheel 28 attached to the rear end portion of the swing arm 27, a seat 29 attached via the seat rail 14, a floor panel 30 attached continuously on both middle frames 13, and a front fork 16 and a front fairing 31 that covers the outside of 16. Furthermore, a floor fairing 32 that covers the side and bottom of the floor panel 30, a rear fairing 33 that covers the lower side of the seat 29 and the side of the power unit 23, and a rear fender 34 that is attached to the rear of the seat rail 14, And a scooter type motorcycle in which the rear unit 28 is belt-driven by the power unit 23.

  A front shock absorber (not shown) composed of a coil spring and a damper is attached to the front fork 16, and a brake rotor 35 of a disc type brake unit for applying a braking force is assembled to the front wheel 19. The handle 17 is provided with rearview mirrors 36 on the throttle side and the brake side, respectively. Further, the fuel tank 20 includes a fuel pump 37 (see FIG. 2), and a fuel hose 39 is connected in communication between the fuel pump 37 and an injector 38 mounted on the engine 21.

  In the power unit 23, the engine 21 is a water-cooled four-stroke two-valve single cylinder, and a V-matic continuously variable transmission 22 with three forward stages is integrated. The engine 21 is an electronic fuel injection type, and an intake manifold 41 of the cylinder head 40 is equipped with an injector 38. For this reason, the injector 38 injects fuel at a high fuel pressure into the intake manifold 41 according to the opening of the throttle by means of a current supplied from an engine control unit (not shown). The intake air to the engine 21 is introduced into the intake manifold 41 through an air filter 42 attached to the inside of the rear fairing 33. The exhaust of the engine 21 is performed through the muffler 80 from the right side of the engine 21.

  The swing arm 27 is provided integrally with the transmission 22 of the power unit 23 and is buffered by a rear shock absorber 45 including a coil spring 43 and a damper 44 disposed between the swing arm 27 and the seat rail 14. The rear wheel 28 is assembled with a drum brake unit (not shown). A stand 46 is rotatably attached to the lower side of the swing arm 27. The front fairing 31 has a headlight unit 47 with a left / right turn signal unit (not shown) incorporated in the front. Further, a tail lamp unit 48 is attached to the upper part of the rear fender 34 in the rear fairing 33.

  As shown in FIG. 2, the fuel tank 20 has a side flange portion 49 provided on both side portions fixed to the middle frame 13 via unillustrated bolts and buffer members so that the fuel tank 20 is located on the center line A1 of the vehicle 10. Is arranged. Further, a fuel pump 37 is assembled to the front side of the fuel tank 20, and a front end portion of the fuel hose 39 is connected to the fuel pump 37 through a hose connector 50. The fuel hose 39 is a flexible resin tube, and is pulled out from the front of the fuel tank 20 where the hose connector 50 is located to the left rear through the right rear. Thereafter, a piping path from the cylinder head 40 of the engine 21 to the injector 38 is formed.

  In the middle of the piping path of the fuel hose 39, the first clamp rubber 51 is attached between the front side of the fuel tank 20 and the right rear side, and the second clamp rubber 52 is provided in the middle from the right rear side to the left rear side. The attached first hose fixing member 53 is assembled. In addition, by assembling the second hose fixing member 55 with the third clamp rubber 54 attached to the cylinder head 40, the first swing shaft 24 and the second swing shaft are provided between the right rear side and the left rear side of the fuel tank 20. Piped along the axial direction of the moving shaft 26.

  As shown in FIG. 3, the first clamp rubber 51 is attached to the fuel hose 39 alone and disposed on the concave surface 57 provided on the tank upper surface 56 of the fuel tank 20. The tank upper surface 56 is held without contact. Further, the second clamp rubber 52 is fixed to the rear flange portion 58 provided at the rear of the fuel tank 20 with a bolt 59 via the first hose fixing member 53. Further, the third clamp rubber 54 is fixed by a bolt 61 to a recess 60 provided on the left side of the cylinder head 40 via a second hose fixing member 55.

  As described above, the fuel hose 39 is piped along the axial direction of the first swing shaft 24 and the second swing shaft 26 from the right rear side to the left rear side of the fuel tank 20. The power unit 23 that is swung on the frame 11 together with the swing arm 27 via the moving shaft 24 and the second swing shaft 26 (see FIG. 1) is made to have a constant bend and is stably routed so that deformation, etc. It does not occur.

  Next, referring to FIG. 4 and FIG. 5, the structure of the first, second, and third clamp rubbers 51, 52, and 54 and the first and second hose fixing members 53 and 55 described in FIG. Explained. The first, second, and third clamp rubbers 51, 52, and 54 and the first and second hose fixing members 53 and 55 have the same structure. The hose fixing member 53 will be described.

  As shown in FIG. 4, the second clamp rubber 52 is made of rubber having elasticity, and has a cylindrical portion 63 between a pair of flange portions 62, and each of the flange portions 62 and a part of the cylinder portion 63. It is a C-shaped cross-sectional shape in which a slit-shaped notch 64 is formed. In addition, the inner edge of each collar portion 62 has a tapered lip portion 65 formed in a tapered shape.

  Since the inner diameter dimension of the second clamp rubber 52 is slightly larger than the outer diameter dimension of the fuel hose 39, the fuel hose 39 is inserted into the second hose 39 by incorporating the fuel hose 39 inside while opening the notch 64. It can be gripped. At this time, the fuel hose 39 can be stably held by the lip portions 65 coming into contact with the outer surface of the fuel hose 39.

  The 1st hose fixing member 53 is metal, Comprising: The 1st board part 67 and the 2nd board part 68 are each protrudingly formed from the edge part of the C-shaped clamp rubber holding | maintenance part 66. As shown in FIG. The width dimensions of the clamp rubber holding portion 66 and the first and second plate portions 67 and 68 are slightly smaller than the length dimension of the cylindrical portion 63 of the second clamp rubber 52. The clamp rubber holding portion 66 has a slightly larger inner diameter when the first and second plate portions 67 and 68 are in close contact with each other than the outer diameter of the cylindrical portion 63 of the second clamp rubber 52.

  A screw hole 69 is formed in the central portion of the first plate portion 67, a screw hole 70 similar to the first plate portion 67 is formed in the central portion of the second plate portion 68, and a screw hole is formed in the lower surface. A nut 71 corresponding to 70 is fixed by a joining means such as welding or adhesion.

  The first hose fixing member 53 incorporates the second clamp rubber 52 that holds the fuel hose 39 inside the clamp rubber holding portion 66 with the first and second plate portions 67 and 68 spaced apart. The rear flange portion 58 behind the fuel tank 20 (see FIG. 3) is sandwiched between the first and second plate portions 67 and 68. A second clamp that holds the fuel hose 39 by inserting a bolt 59 (see FIG. 3) from the screw hole 69 of the first plate portion 67 into the screw hole 70 of the second plate portion 68 and screwing it into the nut 71. The rubber 52 is held on the fuel tank 20.

  At this time, since the bolt 59 is screwed in, the inner diameter dimension of the clamp rubber holding portion 66 is determined when the first and second plate portions 67 and 68 are in close contact with each other, so that the inner diameter dimension is the bolt 59 (see FIG. 3). Therefore, it is possible to prevent deformation without applying unnecessary stress to the second clamp rubber 52 and the fuel hose 39.

  As shown in FIG. 5, the cylindrical portion 63 of the second clamp rubber 52 has an adhesive accommodating portion 72 formed on the inner diameter side, and the adhesive accommodating portion 72 is filled with the adhesive 73, The second clamp rubber 52 can be fixed to the fuel hose 39 without being displaced.

  As described above, since the second clamp rubber 52 has the notch portion 64 (see FIG. 4), the clamp rubber is attached to the fuel hose before assembling the connector of the fuel hose to the fuel pump when the second clamp rubber 52 has no notch portion. Therefore, it is possible to avoid the problem that the work becomes complicated and disadvantageous in terms of cost. In addition, since the adhesive 73 can be filled through the notch 64, workability can be improved.

  Further, since the second clamp rubber 52 has the lip portion 65 at the inner end edge of each flange portion 62, when the lip portion is provided only on one of the conventional ones, the assembling direction with respect to the fuel hose is changed to one from the lip portion side. Therefore, it is possible to avoid the problem that the embeddability is not good.

  Moreover, the 1st hose fixing member 53 equips the nut 71 of the 2nd board part 68, and is being fixed to the back flange part 58 of the fuel tank 20 with the volt | bolt 59 (refer FIG.3, 4). As a result, when fixing to a stay separate from the conventional fuel tank, consideration must be given to the stay side to absorb the dimensional variation between the fuel tank and the stay, which is disadvantageous in terms of cost. It can be avoided. In addition, the nut 71 is not dropped or lost, and workability can be improved.

  Next, a procedure for attaching the fuel hose 39 to the vehicle 10 will be described. As shown in FIG. 3, the hose connector 50 at one end of the fuel hose 39 is first assembled to the fuel pump 37 of the fuel tank 20, and the other end is connected to the injector 38. At this time, the clamp rubbers 51, 52, and 54 are not assembled to the fuel hose 39, and the fuel hose 39 is only disposed on the fuel tank 20. Thereafter, the first clamp rubber 51 is attached on the concave surface 57 of the tank upper surface 56 of the fuel tank 20, and the second clamp rubber 52 is attached in the middle from the right rear side to the left rear side, and on the concave portion 60 of the cylinder head 40. The third clamp rubber 54 is attached to the first.

  Then, the second clamp rubber 52 is sandwiched by the first hose fixing member 53, the first hose fixing member 53 is fixed to the rear flange portion 58 of the fuel tank 20, and the third clamp rubber 54 is fixed by the second hose fixing member 55. The second hose fixing member 55 is fixed to the recess 60 of the cylinder head 40 by sandwiching. At this time, since the first, second, and third clamp rubbers 51, 52, and 54 are attached to be movable in the cylinder direction of the fuel hose 39, the first clamp rubber 51 is a concave surface 57 of the tank upper surface 56. It is arranged after being moved according to the predetermined position above. The second clamp rubber 52 is moved in accordance with the position of the first hose fixing member 53 and then sandwiched between the first hose fixing members 53, and the third clamp rubber 54 is positioned at the position of the second hose fixing member 55. After being moved together, it is sandwiched between the second hose fixing members 55.

  In the fuel hose mounting structure described above, the fuel hose 39 is assembled to the rear flange 58 of the rear part of the fuel tank 20 by the first hose fixing member 53, and the end is connected to the injector 38 of the power unit 23. As a result, the fuel hose 39 can be stably routed with a constant deflection by the support portion on the fuel tank 20 side and the support portion on the power unit 23 side. Further, since the fuel hose 39 is routed along the first and second swinging shafts 24 and 26 (see FIG. 2) because the piping is provided in the left and right direction behind the fuel tank 20, deformation occurs. And stable routing is possible.

  In the fuel hose mounting structure, when the first and second hose fixing members 53 and 55 are assembled to the fuel hose 39, the notch 64 is opened to open the second and third clamp rubbers 52 and 54. A fuel hose 39 is incorporated. After that, in order to assemble by sandwiching between the first and second hose fixing members 53, 55, before connecting the connector of the fuel hose as in the prior art, it is not necessary to pass the clamp rubber through the fuel hose in advance, Workability can be improved, and productivity can be improved.

  In the fuel hose mounting structure, the first clamp rubber 51 is assembled to the fuel hose 39 alone on the concave surface 57 of the tank upper surface 56 of the fuel tank 20. Thereby, the fuel hose 39 can be routed in the fuel tank 20 in a non-contact manner, and the fuel hose 39 does not interfere with the fuel tank 20, so that the reliability of the fuel hose 39 can be ensured.

It is a left view of the vehicle carrying the fuel hose attachment structure which concerns on this invention. FIG. 2 is a partially broken plan view around a fuel tank in the vehicle shown in FIG. 1. FIG. 3 is an external perspective view of FIG. 2. It is a disassembled perspective view explaining the assembly | attachment relationship of each component of the hose fixing member used for the fuel hose attachment structure which concerns on this invention. FIG. 5 is a single sectional view of the clamp rubber shown in FIG. 4.

Explanation of symbols

10 Vehicle (scooter type vehicle)
20 Fuel tank 23 Power unit 30 Floor panel (floor)
37 Fuel pump 38 Injector 39 Fuel hose 51 First clamp rubber (clamp rubber)
52 2nd clamp rubber (clamp rubber)
53 First hose fixing member (hose fixing member)
54 Third clamp rubber (clamp rubber)
55 Second hose fixing member (hose fixing member)
58 Rear flange (flange)
64 Notch (slit)

Claims (5)

In a scooter type vehicle (10) having a low floor type floor (30), a fuel tank (20) disposed on the floor (30), and a power unit (23) supported swingably at the rear of the vehicle body,
A fuel hose (39) connected to a fuel pump (37) provided in the fuel tank (20) is extended toward the rear and one side of the vehicle, and then provided on the rear side of the fuel tank (20). Assemble to the flange portion (58) through the first hose fixing member (53) so as to face the other side of the rear portion of the fuel tank (20) and to the left and right behind the fuel tank (20). And an injector provided with an end portion provided on the power unit (23), with the second unit attached to the other side of the cylinder head of the power unit (23) so as to face upward via a second hose fixing member (55). 38) ,
The fuel hose (39) is located at a position between a connection portion with the fuel pump (37) and the first hose fixing member (53) and on the upper surface of the fuel tank (20). The fuel hose mounting structure , wherein the clamp rubber (51) is assembled independently at a position on the provided concave surface .   The first hose fixing member (53) and the second hose fixing member (55) hold the fuel hose (39) via a clamp rubber (51, 52, 54). The fuel hose mounting structure according to claim 1.   The first hose fixing member (53) includes a C-shaped clamp rubber holding portion (66), and a first plate portion (67) and a second plate portion (projected from a C-shaped end portion). 68) and sandwiching and holding the flange portion (58) of the fuel tank (20) between the first plate portion (67) and the second plate portion (68), the flange portion (58 The fuel hose mounting structure according to claim 1 or 2, wherein the fuel hose mounting structure is fixed to the fuel hose.   The first plate portion (67) and the second plate portion (68) have screw holes (69, 70) for inserting bolts, and the second plate portion (68) further has a screw hole (70). The first hose fixing member (53) includes a nut (71) fixed corresponding to the second plate portion (69) from the screw hole (69) of the first plate portion (67). The fuel hose mounting structure according to claim 3, wherein the fuel hose mounting structure is fixed to the flange portion (58) by being inserted into the screw hole (70) of 68) and screwed into the nut (71). The fuel hose mounting structure according to claim 3 or 4 , wherein the clamp rubber (51, 52, 54) has a slit (64) in a cylinder direction of the fuel hose (39).

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