JP2014065335A - Side stand fitting structure for motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To largely set a banking angle by enough securing a distance between a vehicle and a road surface, and to achieve reduction in weight of a side stand bracket.SOLUTION: In a side stand fitting structure for a motorcycle, a side stand bracket fitting part 41 also serving as an engine bracket is provided on the lower part of a vehicle body frame, and a side stand 46 is journaled to the side stand bracket to freely rise and fall. A fixing part of the side stand bracket 45 to the side stand bracket fitting part 41 is provided on the front side and the rear side across a rotary shaft 47 of the side stand 47. A fixing part 48 on the front side is located vertically side by side with an engine fixing part 42 of the side stand bracket fitting part 41 in a side view of the vehicle, and located at a position at the same height or lower than the rotary shaft 47 of the side stand 46.

Description

  The present invention relates to a motorcycle side stand mounting structure.

  As shown in Patent Document 1 and FIG. 8, a side stand bracket mounting portion 113 that also serves as an engine bracket is formed integrally with a cross member 112 at a lower portion of a body frame 111 of a motorcycle, and a side stand bracket 114 is formed on the side stand bracket mounting portion 113. However, a side stand mounting structure is disclosed in which the side stand 117 is pivotally supported by the bolt 120 so that the side stand 117 is attached to the side stand bracket 114 by being fastened together with the engine 116 using the joint bolt 115. The side stand bracket 114 is attached to the side stand bracket mounting portion 113 using the front side fixing bolt 118 and the rear side fixing bolt 119 in addition to the joint fastening bolt 115.

  Further, FIG. 3 of Patent Document 2 discloses a device in which a side stand switch for detecting a standing state and a lying state of a side stand is attached to a side stand bracket by opening and closing a contact point by rotating the side stand.

Japanese Patent Laid-Open No. 1-282079 JP 2004-276786 A

  However, in the side stand mounting structure shown in Patent Document 1 and FIG. 8, the front side fixing bolt 118 and the rear side fixing bolt 119 for attaching the side stand bracket 114 to the side stand bracket mounting portion 113 are provided at the center or upper portion in the vertical direction of the side stand bracket 114. Therefore, when the side stand bracket 114 is attached, the side stand bracket 114 protrudes downward from the side stand bracket attaching portion 113. For this reason, the distance between the vehicle and the road surface becomes small, and the bank angle cannot be set large.

  Further, when the side stand 117 stands up, the distance between the grounding portion 117A of the side stand 117 and the front side fixing bolt 118 increases, and as a result, the bending moment acting on the front side fixing bolt 118 from the side stand 117 increases. For this reason, sufficient strength is required for the side stand bracket 114. For example, the thickness of the side stand bracket 114 increases, and the weight of the side stand bracket 114 increases.

  Further, the side stand switch described in FIG. 3 of Patent Document 2 has a structure exposed to the lower side of the vehicle. For this reason, the side stand switch cannot be protected against flying stones from the road surface.

  The object of the present invention has been made in consideration of the above-described circumstances, and can be used for a motorcycle that can secure a sufficient distance between the vehicle and the road surface to set a large bank angle and can reduce the weight of the side stand bracket. The object is to provide a side stand mounting structure.

  In the motorcycle side stand mounting structure according to the present invention, a side stand bracket mounting portion that also serves as an engine bracket is provided at the lower part of the body frame, a side stand bracket is mounted on the side stand bracket mounting portion, and the side stand can be tilted up and down. In the motorcycle side stand mounting structure that is pivotally attached to the side stand bracket, the side stand bracket is fixed to the side stand bracket mounting portion on the front side and the rear side across the rotation axis of the side stand. The front side fixing portion is positioned side by side with the engine fixing portion of the side stand bracket mounting portion in the vehicle vertical direction in the vehicle side view, and is positioned at the same height as or lower than the rotation shaft of the side stand. Is, is characterized in that the fixed clamping at the side stand bracket mounting portion on the bolt.

  According to the present invention, the front side fixing portion of the side stand bracket is positioned side by side in the vehicle vertical direction with the engine fixing portion of the side stand bracket mounting portion, and at the same height as or lower than the rotation axis of the side stand. It is positioned. For this reason, the attachment height of a side stand bracket can be raised. Accordingly, the rotation axis of the side stand can be brought close to the engine fixing portion, so that a sufficient bank angle can be set while ensuring a sufficient distance between the vehicle and the road surface. In addition, since the front side fixing portion of the side stand bracket is positioned at the same height or lower position as the rotation axis of the side stand, the bending moment acting on the front side fixing portion from the side stand when the side stand stands can be reduced. For this reason, the required strength of the side stand bracket can be reduced and the thickness of the side stand bracket can be reduced. Therefore, the weight of the side stand bracket can be reduced.

1 is a left side view showing a motorcycle to which an embodiment of a side stand mounting structure for a motorcycle according to the present invention is applied. The left view which shows the vehicle body frame, engine, etc. of FIG. FIG. 3 is an III arrow view showing the side stand in an upright state except for the engine in FIG. 2. The side view which expands and shows a part of FIG. The side view which shows the side stand periphery of FIG. The enlarged view which expands and shows the circumference | surroundings of the attachment part of the side stand of FIG. The disassembled perspective view which shows the attachment state of the side stand bracket in FIG.5 and FIG.6. The partial side view which shows the conventional side stand attachment structure for motorcycles.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a left side view showing a motorcycle to which an embodiment of a side stand mounting structure for a motorcycle according to the present invention is applied. FIG. 2 is a left side view showing the vehicle body frame, the engine, and the like shown in FIG. In the present embodiment, front / rear, left / right, and upper / lower expressions are based on the driver when riding the vehicle.

  As shown in FIGS. 1 and 2, the motorcycle 10 includes a body frame 11, and a head pipe 12 is provided in front of the body frame 11. The head pipe 12 is provided with a steering mechanism 16 including a pair of left and right front forks 14 that incorporate a suspension mechanism (not shown) and rotatably support the front wheel 13, a handle bar 15, and the like. The front wheel 13 is steered left and right by the operation.

  On the other hand, the body frame 11 is, for example, a twin-tube type, and is expanded in the vehicle width direction immediately after the head pipe 12 and then a main frame 17 that also serves as a pair of left and right tank rails extending in parallel and rearward and obliquely downward. A pair of left and right center frames 18 connected to the rear ends of the main frames 17 and extending substantially in the vertical direction; and a seat rail 19 and a seat pillar 20 extending rearward from the rear portions of the center frames 18. Configured.

  A fuel tank 21 is disposed above the main frame 17, and a rider seat 22 and a pillion seat 23 are sequentially disposed behind the fuel tank 21 and above the seat rail 19 and the seat pillar 20. A pivot shaft 24 is installed substantially at the center lower portion of the center frame 18, and a swing arm 25 is pivotally supported on the pivot shaft 24 so as to swing up and down around the pivot shaft 24. A rear wheel 26 is rotatably supported at the rear end of the swing arm 25.

  An engine 27 is suspended from the main frame 17 and the center frame 18 as will be described in detail later, at a substantially central lower portion in the vehicle longitudinal direction between the front wheels 13 and the rear wheels 26 and below the fuel tank 21. The driving force of the engine 27 is transmitted to the rear wheel 26 via a drive chain (not shown).

  For example, a throttle body, a fuel injector, and an air cleaner (not shown) that constitute an engine intake system are sequentially connected to the cylinder head 28 that constitutes the engine 27. A fuel / air mixture is supplied from the engine intake system to a combustion chamber (not shown) of the engine 27.

  Further, an exhaust pipe 29 and an exhaust silencer 30 constituting an engine exhaust system are sequentially connected to the cylinder head 28. The exhaust pipe 29 extends downward from the cylinder head 28 and then extends rearward, and an exhaust silencer 30 is connected to the rear end thereof. In this embodiment, the exhaust silencer 30 is disposed on the right side of the rear wheel 26 below the rear portion of the vehicle.

  In the motorcycle 10, the front part of the vehicle is covered with the front cowl 31, the side part of the vehicle is covered with the side cowl 32, and the lower part of the rider seat 22 and the pillion seat 23 is covered with the rear cowl 33 and the like. 34 is installed. Reference numeral 35 denotes a side bag that is detachably provided on both sides in the vehicle width direction of the rear portion of the vehicle and that can store a luggage (not shown).

  As shown in FIGS. 2 and 3, the lower ends of the left and right center frames 18 are connected and reinforced by a cross member 36. The cross member 36 is integrally formed with an engine bracket 40 and a side stand bracket mounting portion 41 that also serves as the engine bracket, separated from each other in the vehicle width direction.

  The engine suspension bolt 43 is inserted into the engine bracket 40 and the engine fixing portion 42 (FIG. 7) of the side stand bracket mounting portion 41, and as shown in FIGS. 2 and 4, the lower portion of the crankcase 37 of the engine 27 is The engine bracket 40 and the side stand bracket mounting portion 41 are fastened and fixed. Further, the upper portion of the crankcase 37 of the engine 27 is fastened and fixed to the engine suspension bracket 44 integrally extended from the main frame 17 by using the engine suspension bolt 43.

  As shown in FIGS. 4 to 6, a side stand bracket 45 is attached to the side stand bracket mounting portion 41 as will be described in detail later, and a side stand 46 is pivotally supported on the side stand bracket 45 by a rotating shaft 47 so as to be tiltable. It is attached. When the vehicle is stopped, the side stand 46 is rotated in the standing state as shown by the solid line in FIG. 3 to support the vehicle. When the vehicle is traveling, the side stand 46 is rotated in the lying down state as shown in FIGS. 4 and 5. . 3 indicates the lying state of the side stand 46. Accordingly, the side stand 46 is disposed immediately below the rider seat 22 shown in FIG. 1 in consideration of operability by the driver.

  As shown in FIG. 7, the side stand bracket 45 has a shaft insertion hole 51 through which the rotation shaft 47 (FIGS. 5 and 6) of the side stand 46 is inserted, in addition to the front side fixing portion 48 and the rear side fixing portion 49. It is formed. A front fixing bolt 54 is inserted into and tightened between the front fixing portion 48 of the side stand bracket 45 and the front fixing portion 52 of the side stand bracket mounting portion 41, and the rear fixing portion 49 and the side stand bracket mounting portion 41 of the side stand bracket 45 are tightened. The side stand bracket 45 is attached to the side stand bracket mounting portion 41 by inserting and tightening the rear side fixing bolt 55 through the rear side fixing portion 53.

  As shown in FIG. 5, these front side fixing portion 48 (front side fixing bolt 54) and rear side fixing portion 49 (rear side fixing bolt 55) sandwich the rotating shaft 47 of the side stand 46 in the vehicle longitudinal direction. The front side and the rear side are positioned close to the rotation shaft 47, respectively. Among these, the front side fixing portion 48 (front side fixing bolt 54) is positioned side by side with the engine fixing portion 42 (engine suspension bolt 43) of the side stand bracket mounting portion 41 in the vehicle vertical direction as viewed from the side of the vehicle. The rotary shaft 47 is positioned at the same height or lower than the rotary shaft 47. Thereby, the mounting height of the side stand bracket 45 rises with respect to the side stand bracket mounting portion 41.

  The motorcycle 10 of the present embodiment is equipped with a side stand return forgetting prevention device that stops the operation of the engine 27 when the side stand 46 starts while standing. This side stand return forgetting prevention device has a side stand switch 56, and this side stand switch 56 outputs an identification signal for identifying the standing position and the lying position of the side stand 46.

  The protrusion 58 provided near the rotation shaft 47 of the side stand 46 presses the contact 57 of the side stand switch 56 when the side stand 46 is tilted, so that an identification signal indicating that the side stand 46 is in the tilted state is output from the side stand switch 56. Is done. For this reason, the side stand switch 56 is provided in the vicinity of the rotating shaft 47 of the side stand 46, and in this embodiment, the front side fixing portion 48 (front side fixing bolt 54) of the side stand bracket 45 and the side stand bracket mounting portion 41 are fixed to the engine. It arrange | positions between the parts 42 (engine suspension bolt 43).

  Specifically, as shown in FIGS. 5 to 7, a side stand switch bracket 59 is formed on the side stand bracket 45 so as to extend integrally in a direction perpendicular to the side stand bracket 45. A mounting bolt 60 is inserted through the side stand switch bracket 59 and the side stand switch 56 in the vehicle vertical direction, and a nut 61 is screwed into the mounting bolt 60, whereby the side stand switch 56 is fixedly attached to the side stand switch bracket 59.

  When the mounting bolt 60 is inserted in the vehicle vertical direction, the area of the side stand switch 56 in the vehicle side view is reduced, and the front fixing portion 48 (front fixing bolt 54) of the side stand bracket 45 is the engine fixing portion of the side stand bracket mounting portion 41. 42 (engine suspension bolt 43). Further, in the attached state of the side stand switch 56, the lower surface 56A of the side stand switch 56 is crowned from below the vehicle by the head of the front fixing bolt 54 and the side stand switch bracket 59.

  2 and 4 is a rear cushion unit. The upper end is supported by the upper end portion of the center frame 18 and the lower end is supported by the swing arm 25 and the cross member 36 via the cushion lever 63. It is supported by the cushion rod 64. The rear cushion unit 62 absorbs an impact acting on the rear wheel 26 and controls the swinging motion of the rear wheel 26 and the swing arm 25.

With the configuration as described above, the following effects (1) to (4) are achieved according to the present embodiment.
(1) As shown in FIG. 5, the front side fixing portion 48 (front side fixing bolt 54) of the side stand bracket 45 and the engine fixing portion 42 (engine suspension bolt 43) of the side stand bracket mounting portion 41 are vertically They are positioned side by side in the direction and are positioned at the same height as or lower than the rotation shaft 47 of the side stand 46. For this reason, the mounting height of the side stand bracket 45 can be raised with respect to the side stand bracket mounting portion 41. Accordingly, the rotation shaft 47 of the side stand 46 can be brought close to the engine fixing portion 42 (engine suspension bolt 43) of the side stand bracket mounting portion 41, so that a sufficient angle between the vehicle and the road surface can be secured. Can be set large.

  (2) As shown in FIG. 5, the front side fixing portion 48 (front side fixing bolt 54) of the side stand bracket 45 is positioned at the same height or lower position as the rotation shaft 47 of the side stand 46. The distance L between the grounding portion 46A of the side stand 46 and the front side fixing portion 48 (front side fixing bolt 54) of the side stand bracket 45 is shortened when the side stand 46 shown in FIG. The bending moment M acting on 48 (front side fixing bolt 54) can be reduced. For this reason, the required strength of the side stand bracket 45 is reduced, and the thickness of the side stand bracket 45 can be reduced. Therefore, the weight of the side stand bracket 45 can be reduced.

  (3) As shown in FIGS. 5 and 6, the side stand switch 56 has a lower surface 56 </ b> A whose head 56 </ b> A and the side stand of the front side fixing bolt 54 that fastens and fixes the front side fixing portion 48 of the side stand bracket 45 to the side stand bracket mounting portion 41. The switch bracket 59 is crowned from below. For this reason, a stepping stone or the like from the road surface collides with the head of the front fixing bolt 54 or the side stand switch bracket 59, so that the side stand switch 56 can be protected from the stepping stone or the like, and a malfunction of the side stand switch 56 can be prevented.

  (4) As shown in FIG. 7, the side stand bracket 45 is formed with a side stand switch bracket 59 for attaching the side stand switch 56 so as to extend integrally in a direction perpendicular to the side stand bracket 45. For this reason, the strength of the side stand bracket 45 can be improved by the side stand switch bracket 59.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this, You may deform | transform various components in the range which does not deviate from the summary.

DESCRIPTION OF SYMBOLS 10 Motorcycle 18 Center frame 27 Engine 41 Side stand bracket attaching part 42 Engine fixing part 45 Side stand bracket 46 Side stand 47 Rotating shaft 48 Front side fixing part 49 Rear side fixing part 54 Front side fixing bolt 55 Rear side fixing bolt 56 Side stand switch 56A Lower surface 59 Side stand switch bracket

Claims (3)

Side stand bracket for motorcycle, which is provided with a side stand bracket mounting part that also serves as an engine bracket at the lower part of the body frame. In the mounting structure,
Fixing portions to the side stand bracket mounting portion of the side stand bracket are provided on the front side and the rear side across the rotation axis of the side stand,
Among these, the front side fixing portion is positioned side by side in the vehicle vertical direction with the engine fixing portion of the side stand bracket mounting portion in the vehicle side view, and is positioned at the same height or lower position as the rotation shaft of the side stand, A side stand mounting structure for a motorcycle, wherein the side stand bracket mounting portion is fastened and fixed with a bolt. Between the front fixing part of the side stand bracket and the engine fixing part of the side stand bracket mounting part, a side stand switch that outputs a signal for identifying the standing position and the lying position of the side stand is disposed,
The side stand switch is attached to a side stand switch bracket provided on the side stand bracket, and a lower surface thereof is crowned from below by a head portion of a bolt for fastening and fixing a front side fixing portion of the side stand bracket and the side stand switch bracket. The motorcycle side stand mounting structure according to claim 1, wherein the side stand mounting structure is for motorcycles. 3. The side stand mounting structure for a motorcycle according to claim 2, wherein the side stand switch bracket is configured to integrally extend from the side stand bracket in a direction orthogonal to the side stand bracket.

Images