JP4414258B2 - Motorcycle side stand - Google Patents

Description

  The present invention relates to a motorcycle side stand, and more particularly, to a motorcycle side stand in which a stand bar is pivotally supported by a bracket provided at a lower portion of a vehicle body frame via a support shaft.

Such a side stand is already known from, for example, Patent Document 1, Patent Document 2, and Patent Document 3.
Japanese Utility Model Publication No. 59-47582 Japanese Utility Model Publication No. 62-173282 Japanese Utility Model Publication No. 62-21504

  By the way, in order to reduce the weight of the motorcycle, it is desired to reduce the weight of the side stand. Therefore, if the bracket and the stand bar are made of an aluminum alloy, the weight can be reduced. The problem of wear due to repetition arises.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a side stand of a motorcycle that enables weight reduction and prevents wear.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a side stand of a motorcycle in which a stand bar is pivotally supported by a bracket provided at a lower portion of a vehicle body frame via a support shaft. The support shaft is fixed to the stand bar made of, and a cylindrical collar that allows the support shaft to pivot through the bracket made of aluminum alloy is fixed by press fitting , and the stand bar and the opposing surface of the bracket A washer is interposed therebetween.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, an end portion of the collar protrudes from a side surface of the bracket and surrounds an outer periphery of the protruding portion, so that the washer It is interposed between the opposing surfaces of the bracket.

According to a third aspect of the present invention, in addition to the configuration of the second aspect of the invention, the washer has a thickness that is equal to or greater than a protruding amount of the protruding portion from the side surface of the bracket.

According to a fourth aspect of the invention, in addition to the configuration of the first aspect of the invention, the collar and the washer are each made of iron.

The invention of claim 5, wherein, in addition to the configuration of the invention according to any one of claims 1 to 4, the main portion of the stand bar, the opposite side of the pair of grooves facing in the longitudinal direction of the vehicle body to each other And having a cross section of approximately H shape.

  According to the first aspect of the present invention, the bracket and the stand bar are made of aluminum alloy, so that the weight can be significantly reduced as compared with the conventional side stand. In addition, the bracket and the stand bar, which are made of an aluminum alloy, can be prevented from coming into direct contact with the support shaft, thereby suppressing the wear of the bracket and the stand bar.

According to the fifth aspect of the present invention, the stand bar can be further reduced in weight while avoiding the strength reduction, and the appearance can be improved.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

  1 to 4 show an embodiment of the present invention. FIG. 1 is a side view of a motorcycle, FIG. 2 is a side view of a side stand, FIG. 3 is a sectional view taken along line 3-3 in FIG. FIG. 4 is a sectional view taken along line 4-4 of FIG.

  First, in FIG. 1, a body frame F of this motorcycle is made of an aluminum alloy. A pair of left and right main frames 13 extending to the front, and a pair of left and right engine hangers 14 welded to the front portions of the head pipe 12 and both main frames 13 to extend downward from the main frame 13. A pair of left and right pivot plates 15 extending downward and a pair of left and right seat rails 16 extending rearward and connected to the rear portions of the main frames 13. The seat rails 16 are made of carbon fiber. It is formed to form part of the vehicle body cover with the fiber reinforced resin used, 16 ... rear end of are interconnected.

  A V-shaped engine body 17 having a front bank BF and a rear bank BR is supported at the lower part of the two engine hangers 14, the intermediate part of the main frame 13, and the upper and lower parts of the pivot plate 15. The engine body 17 is configured, for example, as a 5-cylinder having 3 cylinders in the front bank BF and 2 cylinders in the rear bank BR.

  A front end portion of a swing arm 18 is swingably supported via a support shaft 19 at an intermediate portion in the vertical direction of the pivot plates 15. The axle of the rear wheel WR is supported on the rear end portion of the swing arm 18. 20 is rotatably supported.

  The power from the output shaft 21 of the transmission built in the engine body 17 is transmitted to the rear wheel WR via the chain transmission means 22, and the chain transmission means 22 is fixed to the output shaft 20. Drive sprocket 23, driven sprocket 24 fixed to the rear wheel WR, and endless chain 25 wound around the sprockets 23, 24.

  An upper end portion of a rear cushion unit 26 is connected to the front portion of the swing arm 18, and a lower end portion of the rear cushion unit 26 is connected to lower portions of the pivot plates 15 through a link mechanism 27. The

  An air cleaner 29 is disposed above the front and rear banks BF, BR in the engine body 17 so as to be sandwiched between the main frames 13 in the vehicle body frame F, and downstream on both sides of the air cleaner 29. The intake ducts 47, to which the ends are connected, pass through the insertion holes 46 provided in both the main frames 13, and extend outside the main frames 13 forward.

  A fuel tank 30 that covers the engine body 17 from above is disposed behind the air cleaner 29, and the fuel tank 30 is supported by the seat rails 16. In addition, a battery 31 is disposed between the air cleaner 29 and the fuel tank 30. A seat 32 for seating a rider is supported on the seat rails 16 at the rear of the fuel tank 30.

  The first individual exhaust pipes 33F connected to the cylinder head 28F of the front bank BF for each cylinder extend below the engine body 17 to the rear wheel WR side, and the first individual exhaust pipes 33F. Commonly connected to the exhaust pipe 34F. The seat rail 16 supports a first exhaust muffler 35F disposed on the upper right side of the rear wheel WR, and a downstream end of the first collective exhaust pipe 34F is connected to the first exhaust muffler 35F. The second individual exhaust pipes 33R connected to the cylinder head 28R of the rear bank BR for each cylinder extend rearward through the upper portion of the rear cushion unit 26, and the second individual exhaust pipes 33R ... are second collective exhaust. Commonly connected to the pipe 34R. Further, the downstream end of the second collective exhaust pipe 34R is connected to a second exhaust muffler 35R supported by the seat rail 16.

  Incidentally, the front of the head pipe 12 is covered with a front cowl 36, and both front sides of the vehicle body are covered with a pair of left and right center cowls 37 connected to the front cowl 36, and a part of the engine body 17 and the front bank BF. A lower cowl 38 that covers the first individual exhaust pipes 33F connected to the cylinder head 28F from both sides is connected to the center cowl 37. In addition, the front cowl 36, the center cowl 37, and the lower cowl 38 are formed of a fiber reinforced resin using carbon fibers.

  The rear portions of the two seat rails 16 are covered with a rear cowl 39 made of synthetic resin together with most of the second exhaust muffler 35R, the fuel tank 30 and the air cleaner 29 are covered with a cover 40, and a front fender that covers the upper side of the front wheel WF. 41 is attached to the front fork 11.

  A lower radiator 42 and an upper radiator 43 disposed above the lower radiator 42 are disposed in front of the engine body 17 so as to be covered from both sides by the center cowl 37.

  Referring to FIGS. 2 and 3 together, a side stand 45 having a stand bar 44 that can be raised and lowered is provided at the lower portion of the left pivot plate 15 that constitutes a part of the vehicle body frame F.

  The side stand 45 includes a stand bar 44 pivotally supported by an aluminum alloy bracket 48 fixed to the lower portion of the left pivot plate 15, and a return spring 49 provided between the bracket 48 and the stand bar 44. The bracket 48 is fixed to the lower portion of the pivot plate 15 by a pair of bolts 50, 50, for example.

  The stand bar 44 is formed by, for example, forging of an aluminum alloy, and a pair of support plate portions 44a spaced from each other so that the bracket 48 is inserted into the upper end portion of the stand bar 44. , 44b are integrally formed so that the upper end of the stand bar 44 is substantially U-shaped.

  Both the support plate portions 44a and 44b are rotatably supported by the bracket 48 by an iron pivot bolt 51 which is a support shaft. The pivot bolt 51 includes an enlarged diameter head portion 51a on one end side that can be engaged with an outer surface of one support plate portion 44a, a large diameter shaft portion 51b having one end coaxially connected to the enlarged diameter head portion 51a, and the other end. An annular step portion 51c that can be engaged with the inner surface of the support plate 44b is formed between the large-diameter shaft portion 51b and a small-diameter screw shaft portion 51d that is coaxially connected to the other end of the large-diameter shaft portion 51b. Is a stepped bolt.

The brackets 48, a cylindrical collar 53 made of iron is provided by the pressure input, the large-diameter shaft portion 51b of the pivot bolt 51 is inserted and one of the support plate portion 44a, to said collar 53 The small diameter screw shaft portion 51d is inserted into the other support plate portion 44b. Moreover, the nut 52 that engages with the outer surface of the other support plate portion 44a is screwed into the protruding portion from the support plate portion 44b of the small-diameter screw shaft portion 51d, and the nut 52 is tightened, whereby the pivot bolt 51 is attached to the stand bar 44. Fixed.

  Both ends of the collar 53 slightly protrude from both side surfaces of the bracket 48, and iron washers 54 and 55 having a thickness larger than the protrusion amount of the collar 53 from the bracket 48 are supported by the both ends of the stand bar 44. It is interposed between the opposing surfaces of the plate portions 44 a and 44 b and the bracket 48.

  By the way, a hook pin 56 is implanted in the bracket 48, and a hook portion 44c is integrally provided at an intermediate portion of the stand bar 44. Thus, the return spring 49 exerts a spring force that elastically biases the stand bar 44 from its neutral position (thought point) to either the retracted position or the protruding position. Both end portions of the return spring 49 are locked to the portion 44c.

  Further, as shown in FIG. 4, the main portion of the stand bar 44 has a pair of groove portions 44d and 44d facing in the longitudinal direction of the vehicle body on the opposite side surfaces so as to have a substantially H-shaped cross section. It is formed.

  Next, the operation of this embodiment will be described. Since the battery 31 is disposed between the air cleaner 29 disposed above the engine body 17 and the fuel tank 30 disposed behind the air cleaner 29, The heavy fuel tank 30 and the battery 31 can be concentrated in the vicinity of the engine body 17, thereby contributing to improvement in the performance of the motorcycle.

  Further, since the bracket 48 and the stand bar 44 of the side stand 45 are made of an aluminum alloy, the side stand 45 can be significantly reduced in weight compared to a conventional side stand in which the stand bar is made of iron.

  In addition, an iron collar 53 that allows an iron pivot bolt 51 fixed to the stand bar 44 to pivot therethrough is provided on the bracket 48, and between the two support plate portions 44 a and 44 b of the stand bar 44 and the opposing surfaces of the bracket 48. Since the steel washers 54 and 55 are interposed, the bracket 48 and the stand bar 44 made of aluminum alloy are prevented from coming into contact with each other and are not made in direct contact with the pivot bolt 51 made of iron. Further, wear of the bracket 48 and the stand bar 44 can be suppressed.

  Further, since the main part of the stand bar 44 has a pair of grooves 44d and 44d on opposite side surfaces and is formed into a substantially H-shaped cross section, the stand bar 44 is lighter while avoiding its strength reduction. Can be Further, since both the groove portions 44d and 44d face in the front-rear direction of the vehicle body, the groove portions 44d and 44d are difficult to see from the side surface, and the appearance in a side view is good even if mud is attached to the groove portions 44d and 44d.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

  For example, the stand bar 44 in the above embodiment is formed by forging aluminum alloy, but the stand bar 44 may be formed by die casting.

1 is a side view of a motorcycle. It is a side view of a side stand. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG.

44 ... Stand bar 44d ... Groove 45 ... Side stand 48 ... Bracket 51 ... Pivot bolt 53 as a support shaft ... Collar 54, 55 ... Washer F ... Body frame

Claims (5)

In a side stand of a motorcycle in which a stand bar (44) is pivotally supported via a support shaft (51) on a bracket (48) provided at a lower portion of the vehicle body frame (F), the stand made of an aluminum alloy is used. The support shaft (51) is fixed to the bar (44), and a cylindrical collar (53) that allows the support shaft (51) to pivot through the bracket (48) made of an aluminum alloy is fixed by press-fitting. A side stand for a motorcycle, wherein washers (54, 55) are interposed between opposing surfaces of the stand bar (44) and the bracket (48). The washer (54, 55) faces the stand bar (44) and the bracket (48) so that the end of the collar (53) protrudes from the side surface of the bracket (48) and surrounds the outer periphery of the protrusion. The motorcycle side stand according to claim 1, wherein the motorcycle side stand is interposed between the surfaces. The side stand of a motorcycle according to claim 2, wherein the washer (54, 55) has a thickness equal to or greater than a protruding amount of the protruding portion from a side surface of the bracket (48). The side stand of the motorcycle according to any one of claims 1 to 3, wherein the collar (53) and the washers (54, 55) are each made of iron. The main portion of the stand bar (44) has a pair of grooves (44d) facing in the longitudinal direction of the vehicle body on opposite sides, and is formed in a substantially H-shaped cross section. The side stand of the motorcycle according to any one of 4 to 4 .

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