JPH09150761A - Fitting structure of stand lock device in motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a stand lock device from an obstacle on the road, and to improve the anti-theft performance of the stand lock device in a fitting structure of the stand lock device in a motorcycle. SOLUTION: In a motorcycle having a center stand 28 which is pivotably supported by a lower part of the motorcycle in an oscillating manner between the erection position and the storage position, a pair of right and left bosses 32L, 32R are provided in a downwardly projecting manner on a lower surface of an engine case 18a of an engine arranged on a lower part of the motorcycle. In the erected condition of the center stand 28, a stand lock device 30 capable of locking the center stand 28 is arranged between the right and left bosses 32L, 32R, a stand shaft 34 of the center stand 28 is extended in the right-to-left direction along a lower surface of the stand lock device 30, and right and left end parts of the stand shaft 34 are supported by a pair of right and left bosses 32L, 32R.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a stand lock device in a motorcycle.

[0002]

2. Description of the Related Art A conventional stand lock device for a motorcycle is disclosed in, for example, Japanese Patent Laid-Open No. 7-69257. In this stand lock device, a bracket that pivotally supports a center stand is provided in the lower portion of a vehicle body frame, and a tongue-shaped cam plate is rotatably provided inside the bracket. The center stand is locked by inserting it into the slit of the center stand when standing up. The cam plate is pivotally supported on the base plate of the bracket with a bolt, and is rotated by a wire operation to be inserted into and removed from the slit in the front-rear direction.

[0003]

However, in the stand lock device disclosed in Japanese Patent Laid-Open No. 7-69257, since the bracket directly faces the road surface, obstacles on the road, flying stones, etc. Main parts may be damaged. Further, conventionally, there is a demand for a stand lock device mounting structure that is more difficult to remove from a vehicle and that is not simply a mounting structure using welding or bolts.

The present invention has been made in view of the above conventional problems, and can protect the stand lock device from obstacles on the road, and the stand lock device itself can be easily removed from the vehicle. It is an object of the present invention to provide a mounting structure for a stand lock device in a motorcycle that prevents the above and improves the antitheft performance of the device.

[0005]

The present invention has the following configuration to achieve the above object. That is, according to the present invention, in a motorcycle having a center stand pivotally supported at a lower portion of a vehicle so as to be swingable between an upright position and a retracted position, the left and right surfaces of the engine case of the engine disposed at the lower portion of the vehicle are left and right. A pair of bosses are provided so as to project downward, and a stand lock device that can lock the center stand in the standing state of the center stand is provided between the left and right bosses, and the support shaft of the center stand is the stand. A stand lock device mounting structure for a motorcycle, characterized in that the left and right ends of the support shaft are supported by the pair of left and right bosses while extending in the left-right direction along the lower surface of the lock device.

According to the present invention, since the stand lock device is disposed between the support shaft supported by the pair of left and right bosses and the lower surface of the engine, the support shaft functions as a bumper for protecting the stand lock device. Therefore, this stand shaft can protect the stand lock device from obstacles on the road, flying stones, and the like.

In order to remove the stand lock device from the engine, the support shafts supported by the left and right bosses must be removed before that. Therefore, the stand lock device can be prevented from being easily removed from the vehicle, and the anti-theft performance of the stand lock device can be enhanced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a motorcycle according to this embodiment, and FIG. 2 is a bottom view of the motorcycle according to this embodiment. 3 is a perspective view of the stand lock device of the present embodiment as seen from below, FIG. 4 is a cross-sectional view of the structure around the portion A in FIG. 3 as seen from the front of the vehicle, and FIG. 5 is an upper view of the stand lock device of this embodiment. It is the perspective view seen from. FIG. 6 is a perspective view of a stand lock device of a modified example of the present embodiment as seen from above, and FIG. 7 is a cross-sectional view of the structure around the portion B in FIG. 6 as seen from the front of the vehicle. In the present embodiment, the left and right refer to the left and right sides with respect to the traveling direction of the vehicle.

The motorcycle 2 according to this embodiment is a so-called scooter as shown in FIG. 1, and has a footrest space 1 between a steering wheel 6 for steering the front wheels 4 and a driver's seat 8.
It is equipped with 0. Below the driver's seat 8,
A storage box 14 capable of storing the helmet 12 is provided, and the left and right side surfaces of the storage box 14 are covered with frame covers 16.

As shown in FIG. 1, the engine 18 is of a unit swing type and has a front portion pivotally supported by a lower portion of a vehicle body frame (not shown), and a rear wheel that rotates a rear wheel 20. Holds freely. The engine 18 rotatably supports a crankshaft (not shown) and transmits the power extracted by the crankshaft to the rear wheels 20.
It has an engine case 18a having a1 therein, and a cylinder 18b that projects substantially horizontally and forward from the front end of the engine case 18a. As shown in FIG. 2, the left side portion of the engine case 18a (usually the left side crankcase of the left and right split crankcase) extends rearward along the left side surface of the vehicle and the rear end of the rear wheel 20. It is pivotally supported. Further, as shown in FIG. 1, the engine case 18a
The bracket portion 18a2 protruding from the front portion of the vehicle is supported by the vehicle body frame below the rear end of the footrest space 10 via the cushion link 22, while the rear portion of the engine case 18a is supported by the rear portion of the vehicle body frame. The cushion unit 24 is suspended at the lower end of which the upper end is supported, so that the rear wheel 20 can swing up and down in accordance with the unevenness of the road surface.

As shown in FIGS. 1 and 2, a muffler 26 is connected to an exhaust port provided on a lower wall of a cylinder 18b of the engine 18 via a joint 26a,
The muffler 26 is arranged so as to extend rearward and downward from the exhaust port, bend backward, and further extend rearward and upward along the right side surface of the vehicle.

In the motorcycle 2 according to this embodiment, as shown in FIG. 1, a center stand 28 pivotally supported at the lower part of the vehicle so as to be swingable between an upright position and a retracted position,
A stand lock device 30 is provided for locking the center stand 28 in its upright state. Hereinafter, the mounting structure of the stand lock device 30 will be described with reference to the configuration of the stand lock device 30 and the center stand 28.
This will be described together with the configuration of.

As shown in FIG. 3, the mounting structure of the stand lock device 30 is such that a pair of left and right bosses 32L and 32R are provided on the lower surface of the engine case 18a so as to project downward, and the stand lock device 30 is mounted on the left and right bosses. 32
The stand shaft 34 (corresponding to a support shaft) of the center stand 28 extends in the left-right direction along the lower surface of the stand lock device 30.
The left and right ends of 4 are supported by a pair of left and right bosses 32L and 32R.

The pair of left and right bosses 32L and 32R are provided on the lower surface of the front end portion of the engine case 18a as shown in FIG. 2 and as shown in FIG.
Are integrally formed on the lower surface of the so as to project downward, and are spaced apart in the left-right direction. As shown in FIG. 3, each of the left and right bosses 32L and 32R has a substantially cylindrical shape having a center axis in the left-right direction, and has a shaft hole 32L penetrating in the left-right direction.
1, 32R1. Also, the left and right bosses 32L, 32
On the front side of the boss 32R on the right side of the muffler 26 installation side of R, a female screw portion 36 is vertically formed at a position higher than the upper edge of the shaft hole 32R1 of the boss 32R, and at the rear side, a female screw portion 36 is formed. A stopper portion 38 having a planar lower surface is formed at substantially the same position as the lower end surface of the screw portion 36. On the other hand, in the left boss 32L, female screw portions 40, 40 similar to the female screw portion 36 are formed on both front and rear sides thereof.

As shown in FIG. 3, the stand lock device 30 has a box shape that opens downward and has a width dimension that is substantially the same as or smaller than the distance between the left and right bosses 32L and 32R. Main body case 42,
A cover 44 is attached to the main body case 42 from below. The left and right bosses 32L and 32R on the mating surfaces of the body case 42 and the cover 44, respectively.
A tongue-shaped mounting piece 42a and a mounting piece 44a are integrally projected at a position facing the three female screw portions 36, 40, 40 of the above, and the mounting piece 42a and the mounting piece 44a are vertically stacked. , The female screw portion 36 by the bolt 46
Alternatively, they are fastened together with the female screw portion 40. In this state, the cover 44 closes the body case 42 from below,
The lower surface thereof has the shaft holes 32L1, 3L of the bosses 32L, 32R.
It is located at substantially the same height as or above the upper edge of 2R1.

As shown in FIG. 3, the right side wall of the main body case 42 is formed with a notch 42b which opens below the stopper 38 and toward the rear of the right boss 32R. In addition, a holding piece 42c that projects toward the inside of the main body case 42 and holds one end of a tension coil spring 52 to be described later is provided at the rear end edge of the cutout portion 42b.

As shown in FIG. 3, a lock plate 48 is provided inside the main body case 42 so as to project from the notch 42b so as to be slidable in the left-right direction and to be retractable with respect to the stopper 38, and this lock. An engaging pin 50 that engages the plate 48 with the upper wall of the main body case 42, a tension coil spring 52 that constantly urges the lock plate 48 in the protruding direction, and a support pin 54 on the upper wall of the main body case 42. The lock plate 48 is rotatably supported and
A lock lever 56 for sliding the lock lever 56 in the protruding direction thereof and an operation wire 58 for rotating the lock lever 56 in the direction of retracting the lock plate 48 are assembled.

As shown by the imaginary line in FIG. 4, the lock plate 48 projects further outward than the stopper portion 38 when it projects, and the tip of the lock plate 48 becomes the outer surface of the stopper portion 38 when it is retracted as shown by the solid line. Fits at approximately the same position or inward. As shown in FIG. 4, the engagement pin 50 is fitted in a long hole 48a that is provided in the lock plate 48 and that is long in the left-right direction. A flange portion 50a having a large outer diameter is integrally formed. Also, the engagement pin 50
A protrusion 50b protruding in the radial direction that can be inserted into the long hole 48a is provided on the upper part of the. The engaging pin 50 is inserted into the long hole 48b of the lock plate 48 from the lower side from the protruding portion 50b side, and then the protruding portion 50b is brought into contact with the inner surface of the upper wall of the main body case 42. It is fixed to the main body case 42 by facing the outside through the hole 42d and crimping it into a curved surface. Therefore, the caulking portion 50c at the tip is located above the body case 42.

One end of the operation wire 58 is fixed to the lock lever 56 as described above, and as shown in FIG. 5, the operation wire 58 is wired through a predetermined route in the vehicle and the other end is connected to the seat lock device 60. To be done. The seat lock device 60 is a key cylinder 64 that is rotated by a key 62, and a locking piece that is attached to the tail end side of the key cylinder 64 and that projects from the lower surface of the driver's seat 8 (shown in the figure). The seat lock main body 66 is capable of holding and releasing (omitted). The other end of the operation wire 58 is connected to a rotating portion of the key cylinder 64 (so-called inner cylinder of the key cylinder), and the user pulls the operation wire 58 by rotating the key cylinder 64 by a key operation. As a result, the lock lever 56 can be rotated in the direction in which the lock plate 48 is retracted.

As shown in FIG. 5, the center stand 28 is mainly composed of a pair of left and right leg portions 68L and 68R and a connecting bar 70 which connects the lower portions of the left and right leg portions 68L and 68R to the left and right. . The lower part of the leg portion 68L on the left side extends long laterally to form a footrest portion 68L1. Further, the center stand 2 is provided on the outer surface of the left leg portion 68L.
A cushion member 72 made of rubber or the like elastically abutting on the lower surface of the engine case 18a when the 8 is stowed is attached via a bracket 74, and the center stand 28 is stably provided in the stowed position and the standing position near the lower side thereof. Hook 76 for locking a spring (not shown) for holding the
Is protruded.

Shaft holes 78L1 and 78R1 penetrating in the left-right direction are formed in the upper portions of the pair of left and right leg portions 68L and 68R, respectively.
Plates 78L and 78R provided with are provided. When the lock plate 48 protrudes in the upright state of the center stand 28, the lock plate 4 is provided in the rear portion of the shaft hole 78R1 of the right plate 78R.
An abutting piece 78R2 is provided so as to face the lower surface of the distal end portion of the No. 8.

As shown in FIG. 3, the center stand 28 includes a pair of left and right bosses 32L and 32R via a stand shaft 34 after the stand lock device 30 is arranged between the pair of left and right bosses 32L and 32R. Supported by. That is, after the stand lock device 30 is fastened to the lower surface of the engine case 18a with the three bolts 46, the left and right plates 78L and 78R are attached to the left and right bosses 32L and 3L.
2R, and the stand shaft 34 is passed through the shaft hole 78R1 of the right side plate 78R, the shaft holes 32L1 and 32R1 of the left and right bosses 32L and 32R, and the shaft hole 78L1 of the left side plate 78L. The split pin 80 is stopped in the pin hole 34a at the tip. The stand shaft 34 is inserted from the side where the muffler 26 is arranged before the muffler 26 is mounted, and when the muffler 26 is mounted later, the flange-shaped head portion 34 b is on the outer peripheral surface of the muffler 26. It is supposed to be close. That is,
As shown in FIG. 2 or 5, left and right bosses 32L, 32
The muffler 26 extends on the center axis of the stand shaft 34 supported by R and on the head portion 34b side thereof, and the muffler 26 must be removed in order to pull out the stand shaft 34.

The center stand 28 thus constructed
In its upright position, the rear wheel 20 as shown by the solid line in FIG.
While supporting the vehicle in an upright posture with the front wheels (in some cases, the front wheels 4) being in a floating state, the left and right legs 68L and 68R are rearward from the stand shaft 34 along the lower surface of the engine case 18a in the retracted position. The extended posture fits into the vehicle.

Next, the operation of the stand lock device 30 according to this embodiment will be described. When the center stand 28 is not locked, the pulling force acts on the operation wire 58, and the lock plate 48 is in the retracted state. Specifically, the tip of the lock plate 48 is the boss 32 on the right side.
Located inside the R stopper portion 38, the center stand 28 can freely swing between the retracted position and the standing position.

When the center stand 28 is locked from this state, the center stand 28 is raised when the vehicle is stopped, the key cylinder 64 is rotated to one side, and the tensile force applied to the operation wire 58 is released. When the operation wire 58 is loosened by this, as shown by an imaginary line in FIG.
The lock plate 48 slides in the protruding direction by the tension coil spring 52, protrudes by a predetermined amount from the outer surface of the stopper portion 38, and the lower surface thereof faces the upper surface of the contact piece 78R2 of the center stand 28.

Thus, even if an external force is applied to the center stand 28 to swing the center stand 28 from the upright position to the retracted position, the contact piece 78R2 contacts the lower surface of the lock plate 48 and the stopper portion 38. Presses the lock plate 48 from above, so that the swing of the center stand 28 due to the external force is reliably prevented.

When the stand lock device 30 is released from the locked state, the key cylinder 64 is rotated to the other side and the operation wire 58 is pulled to rotate the lock lever 56 in a predetermined direction to lock the lock plate. 48
To resist the urging force of the tension coil spring 52. As a result, as shown by the solid line in FIG. 4, the tip of the lock plate 48 is retracted until it is located inside the abutment piece 78R2, which releases the abutment piece 78R2 from the lock plate 48. Can swing freely from the standing position to the stored position.

Next, the operation and effect of the mounting structure of the stand lock device 30 constructed and operated as described above will be described. According to the mounting structure of the present embodiment, the stand lock device 30 is disposed between the stand shaft 34 supported by the pair of left and right bosses 32L and 32R and the lower surface of the engine case 18a, so that the stand shaft 34 stands. It functions as a bumper for protecting the lock device 30, and the stand shaft 34 can protect the stand lock device 30 from obstacles on the road, flying stones, and the like.

Further, since the main parts such as the lock plate 48 and the like constituting the locking means are covered with the main body case 42 and the cover 44, it is possible to prevent the accumulation of mud and the like inside the stand lock device 30. At the same time, the main part is closed by the main body case 42 and the cover 44, so that a remarkable effect that it becomes difficult to operate from the outside can be obtained. On the other hand, the above-mentioned Japanese Patent Laid-Open No.
In the stand lock device described in Japanese Patent Laid-Open No.-69257, since the bracket accommodating the main parts of the locking means is opened upward, mud or the like may enter the bracket and foreign matter may accumulate around the main parts. There is a fear.

Further, according to the present embodiment, in order to remove the stand lock device 30 from the engine case 18a,
Before that, attach the stand shaft 34 to the left and right bosses 32L, 32
Must be removed from R. Moreover, the stand shaft 34
Since the outer peripheral surface of the muffler 26 is opposed to the head portion 34b of the muffler 26, even if the stand shaft 34 is to be pulled out, the muffler 26 extends in the pulling direction, and therefore the stand shaft 34 cannot be removed. Therefore, the stand lock device 30 can be easily prevented from being removed from the vehicle, and the anti-theft performance of the stand lock device 30 can be enhanced.

Further, the lock plate 48 is attached to the main body case 4
The caulking portion 50c of the engaging pin 50 for engaging with 2 is
Since there is a gap between the upper surface of the main body case 42 and the lower surface of the engine case 18a, it is possible to prevent the caulking portion 50c from being operated from the outside, and the antitheft performance can be further improved.

The present embodiment is a preferred embodiment of the present invention, and the technical scope of the present invention is not limited to this embodiment. For example, in the present embodiment, main parts such as the lock plate 48 are incorporated in the main body case 42 opened downward, whereas, as shown in FIG. 6, the inside of the main body case 42 opened upward is shown. The lock plate 48 and other main parts may be incorporated into the. In this case, a cover is preferably attached to the upper side of the main body case 42, but the main body case 42 may be attached to the engine case 18a.
It is not always necessary to provide a cover if it is covered with the lower surface of the.

[0033]

As described above, according to the present invention, it is possible to protect the stand lock device from obstacles on the road and prevent the stand lock device itself from being easily removed from the vehicle. The anti-theft performance of the device can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle according to an embodiment.

FIG. 2 is a bottom view of the motorcycle according to the present embodiment.

FIG. 3 is a perspective view of the stand lock device of the present embodiment as seen from below.

FIG. 4 is a cross-sectional view of the structure around the portion A in FIG. 3 viewed from the front of the vehicle.

FIG. 5 is a perspective view of the stand lock device of the present embodiment as seen from above.

FIG. 6 is a perspective view of a stand lock device of a modified example of the present embodiment viewed from above.

7 is a cross-sectional view of the structure around the portion B in FIG. 6 viewed from the front of the vehicle.

[Explanation of symbols]

 2 Motorcycle 18 Engine 18a Engine Case 28 Center Stand 30 Stand Lock Device 32L, 32R Boss 34 Stand Shaft (Corresponding to Support Shaft)

Claims (1)

[Claims] 1. A motorcycle having a center stand pivotally supported at a lower portion of a vehicle so as to be swingable between an upright position and a retracted position, wherein a left-right pair is provided on a lower surface of an engine case of an engine disposed at the lower portion of the vehicle. The boss of is projected downward and provided,
A stand lock device capable of locking the center stand in an upright state is disposed between the left and right bosses, and a support shaft of the center stand extends in the left-right direction along a lower surface of the stand lock device. A structure for mounting a stand lock device in a motorcycle characterized in that the left and right ends of the support shaft are supported by the pair of left and right bosses.