JPH11139372A - Article storage room support structure of motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a sufficient volume of an article storage room to easily set a seat at the appropriate height position by enhancing the support rigidity of the article storage room as well as the rigidity of an entire body frame. SOLUTION: In a motorcycle having an article storage room provided below a seat, a main frame 4 extends backward and diagonally downward from a head pipe, and a pair of right and left rear frames 5 that branch horizontally from the middle of the main frame 4 rise diagonally upward after extending backward and almost horizontally to form a body frame. An internal combustion engine is suspended below the main frame 4, and the article storage room is supported on the rear frames 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for supporting an article storage chamber of a motorcycle having an article storage chamber below a seat.

[0002]

2. Description of the Related Art In an example in which an article storage room such as a helmet storage box is provided below a seat, a swing in which an internal combustion engine and a rear wheel are unitized by a power transmission case and supported so as to swing with respect to a vehicle body. It is often found in unit type motorcycles. FIG. 6 shows an example of a motorcycle 01 described in Japanese Patent Application Laid-Open No. 2-6284.

In the body frame 02 of the motorcycle 01, a single main frame 04 made of a relatively large-diameter round pipe extends obliquely downward and backward from the head pipe 03 and obliquely extends from the rear end of the main frame 04. One rear frame 05 made of a rectangular pipe extends upward while gently curving the inclination.

A swing unit case 06, which is swingably disposed below the body frame 02, has a front power transmission unit 08 in which a front internal combustion engine 07 and a rear wheel 09 pivotally supported at a rear end are provided.
The upper part of the crankcase of the internal combustion engine 07 is pivotally supported by a pivot shaft 010 near the rear end of the main frame 04, and the rear end where the rear wheel 09 is supported and the upper part thereof A rear cushion 011 is interposed between the rear frame 05 and the rear cushion 05.

A helmet storage chamber 012 is supported on the rear part of the main frame 04 and the rear frame 05, and a seat 013 provided on the helmet storage chamber 012 is pivotally supported at the front end to open the upper opening of the helmet storage chamber 012. Is openably and closably supported.

In the helmet storage room 012, the front of the bottom wall is mounted to the rear of the main frame 04 via a rubber mount 015, and the upper part of the rear wall is mounted on a bracket 05 a provided at the upper end of the rear frame 05. 016.

[0007]

The helmet storage room 012
The main body frame 04 supporting the
Since the front end of one rear frame 05 is connected to the rear end of the rear frame 05 at a substantially right angle, the rigidity of the entire vehicle body frame is not sufficiently secured.

Further, since the helmet storage chamber 012 is supported over both the main frame 04 and the rear frame 05, it is difficult to obtain a high support rigidity of the helmet storage chamber 012.

The lower part of the center of the body frame 02 where the helmet storage chamber 012 is supported is a swing unit case 06.
The pivot portion (pivot shaft 010) and the vertical swinging point of the power transmission portion 08, and therefore the rear portion of the main frame 04 is located at a relatively high position avoiding these, and the helmet housing having a bottom wall thereon is provided. Room 012 is also at a higher position.

[0010] The helmet storage room 012 needs a large capacity to store a helmet, and since such a large helmet storage room 012 is located at a high position of the vehicle body, the seat 013 supported thereon naturally becomes high and the vehicle body becomes high. It is difficult to position the seat at an appropriate height.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to improve the rigidity of the entire vehicle body frame and the support rigidity of the article storage chamber to secure a sufficient volume of the article storage chamber. The present invention provides a motorcycle article storage room support structure that can easily set a seat at an appropriate height position.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a motorcycle having an article storage chamber below a seat, wherein a main frame extends obliquely downward and rearward from a head pipe. A pair of left and right rear frames branched to the left and right from the middle of the main frame extend substantially horizontally rearward, and then rise obliquely upward to form a body frame, suspending the internal combustion engine below the main frame, The motorcycle has an article storage room support structure in which the article storage chamber is supported on a rear frame.

At least one main frame extending obliquely downward and backward from the head pipe branches right and left from the middle thereof, and a pair of right and left rear frames extends substantially horizontally rearward to form a body frame. Therefore, the rigidity of the entire body frame can be improved. Further, since the article storage room is supported on the pair of rear frames, the support rigidity of the article storage room is sufficiently ensured.

A motorcycle different from a so-called swing unit type in which the internal combustion engine is suspended below the main frame and does not swing separately from the power transmission system, and is therefore below the central portion of the body frame where the article storage chamber is supported. Does not require the swing unit case to swing, and can support the article storage room at a relatively low position. Therefore, the volume of the article storage room can be sufficiently ensured, and the sheet supported thereon can be set at an appropriate height.

According to a second aspect of the present invention, in the motorcycle article storage structure supporting structure of the first aspect, a space between a rear end of the main frame and a rear portion of the rear frame extending substantially horizontally. It is characterized by being connected by a connecting member.

With a simple structure in which the connecting member is provided, the rear portion of the main frame, the horizontal portion of the rear frame, and the connecting member form three sides of a triangle in side view, so that the rigidity of the entire body frame can be further improved. it can.

According to a third aspect of the present invention, in the structure for supporting an article storage room of a motorcycle according to the first or second aspect, a rear fork pivot for pivotally supporting a front end of a rear fork is provided below a rear end of the main frame. A concave portion having a bottom portion at a rear portion of the main frame is formed between horizontal portions of the pair of left and right rear frames.

The recess formed between the horizontal portions of the pair of left and right rear frames as the inclined bottom of the rear portion of the main frame except for a portion that interferes with the swing of the rear fork pivotally supported at the lower rear end of the main frame. Therefore, a sufficient space can be secured, and the concave portion can be used for disposing an article storage room or the like.

According to a fourth aspect of the present invention, in the structure for supporting an article storage room of a motorcycle according to the third aspect, a lower portion of the article storage chamber is bulged into the recess. The article storage room can be kept at a low position while ensuring a sufficient volume of the article storage room, and the sheet supported thereon can be set at an appropriate height.

According to a fifth aspect of the present invention, in the structure for supporting an article storage room of a motorcycle according to any one of the first to fourth aspects, the seat pivotally supported by a front edge of the article storage chamber is provided. The article storage chamber is supported by the article storage chamber while covering the article storage chamber so as to be openable and closable, and the article storage chamber is elastically supported by the body frame at a front portion of a bottom wall, a rear portion of the bottom wall, and an upper portion of the rear wall. I do.

The article storage chamber for supporting the seat is elastically supported at the front part of the bottom wall, the rear part of the bottom wall, and the upper part of the rear wall of the article storage chamber with respect to the body frame, so that the article storage chamber is firmly supported and the vehicle body is Vibration can be suppressed from being transmitted to the article storage room and the seat.

According to a sixth aspect of the present invention, in the structure for supporting an article storage room of a motorcycle according to any one of the first to fifth aspects, the article storage chamber is a helmet storage box. And

A helmet storage box having a large volume capable of storing a helmet can be easily supported on a rear frame with high support rigidity, and a seat supported thereon can be easily set at an appropriate height.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an overall side view of a motorcycle 1 according to the present embodiment, and FIGS. 2 and 3 show an overall side view and a plan view of a vehicle body frame 2.
Shown in

The body frame 2 is connected to the head pipes 3 through 1
A round pipe-shaped main frame 4 extends obliquely downward and downward, and a pair of left-right symmetrical rear frames 5 and 5 branching left and right from an intermediate portion extend substantially horizontally rearward and then obliquely upward. I'm standing up.

Accordingly, as shown in FIG. 2, the main body frame 2 has a main frame front portion 4a which is obliquely inclined in a side view.
And a rear frame inclined portion 5b which rises obliquely through a substantially horizontal rear frame horizontal portion 5a to form a shape in which the center is curved downward substantially, and the rigidity of the entire body frame is high. A rear portion 4b of the main frame 4 projects below the rear frame horizontal portion 5a.

A gusset 6 reinforces the space between the head pipe 3 and the main frame 4, and a pair of right and left rear frames 5, 5
A cross plate 7 having a triangular shape in a plan view is provided between portions branched from the main frame 4 at the front end of the front frame, and a cross pipe 8 is provided at a boundary between the rear frame horizontal portion 5a and the inclined portion 5b, A cross pipe 9 is provided, and a rear sub-frame 10 bent in a U-shape in plan view is connected rearward between rear ends of the left and right rear frame inclined portions 5b in a horizontal posture. A gusset 11 reinforces a connection corner between the rear frame inclined portion 5b and the rear subframe 10.

A pair of left and right symmetric pivot plates 12, 12 are welded to the rear portion 4b of the main frame, and are vertically extended downward to some extent by welding the upper edges, and the upper edges of the pivot plates 12, 12 are attached to the main frame. The rear portion to be welded along the frame rear portion 4b is bent to extend the connecting portions 13 and 13 diagonally upward, and the upper ends of the U-shaped connecting portions 13 and 13 are welded to the cross pipe 8. The connection and reinforcement between the rear end of the main pipe 4 and the cross pipes 8 provided on the left and right rear frames 5 and 5 are reinforced.

Therefore, as shown in FIG. 2, the rear frame horizontal portion 5a, the main frame 4b, and the connecting portion 13 form three sides of a triangle in a side view, thereby improving the overall rigidity of the body frame 2. And left and right rear frame horizontal part 5
A concave portion having a bottom surface bent in a U-shape between a portion 5a and a portion along the rear portion 4b of the pivot plate 12 along the obliquely inclined main frame and an upper surface of the connecting portions 13 and 13 which are oppositely inclined.
15 are formed.

In the vehicle body frame 2 as described above, engine mount brackets 16, 16 are vertically provided at front portions of the rear frame horizontal portions 5a, 5a, and the rear frame horizontal portions 5a, 5a are provided.
a and gussets 17 are fixed at the bends of the inclined portions 5b and 5b, and support brackets 18 and 18 are provided on the left and right sides of the cross pipe 8.
At the upper ends of the rear frame inclined portions 5b, 5b, a long horizontally extending support bracket 19, 19 is attached to a connection portion with the rear subframe 10, and further, the rear subframe 10
A support bracket 20 is provided at the center of the rear part which is oriented left and right, and a pair of support brackets 21 and 21 are provided on the left and right sides thereof.

A front wheel 26 is pivotally supported at the lower end of a front fork 25 rotatably supported by the front head pipe 3 of the vehicle body frame 2, and a handle 27 is extended right and left on an upper part integral with the front fork 25. Installed.

A pair of left and right pivot plates 12 and 12 suspended from the main frame rear portion 4b are provided with bearings 12a around lower rear ends of the main frame rear portions 4b, and pivot shafts penetrating the bearings 12a. Rear forks 29, 29, whose front ends are pivotally supported at both left and right ends, extend rearward, and the rear wheel 30, which is pivotally supported at the rear ends of the rear forks 29, 29, can swing up and down. A rear cushion 31 is interposed between the end and the gusset 11 provided at the upper end of the rear frame inclined portion 5b above the end.

Below the rear portion 4b of the main frame, two support shafts 32, 33 are provided at two places: an engine mount bracket 16 suspended from the horizontal portion 5a of the rear frame and a pivot plate 12 suspended from the rear portion 4b of the main frame. An internal combustion engine 34 is suspended. The internal combustion engine 34 is a four-cycle, one-cylinder cylinder, and a cylinder 34b is projected forward and substantially horizontally from a crankcase 34a.

A carburetor 35 is disposed above a cylinder head 34c of the internal combustion engine 34, and an intake pipe 36 extending from an upper portion of the cylinder head 34c is connected to the carburetor 35. Air cleaner over both sides of 4
37 is provided and connected to the vaporizer 35 by a connection pipe 38.

A battery 39 is disposed above the air cleaner 37 and to the right of the head pipe 3. An exhaust pipe 45 extends from a lower portion of the cylinder head 34c, and the exhaust pipe 45 is bent to extend rearward, substantially horizontally, to the right, and connected to a muffler 46 disposed on the right side of the rear wheel 30.

A substantially rectangular parallelepiped fuel tank 40 is supported on the rear subframe 10 which is connected to the rear ends of the rear frames 5 and 5 and is bent in a U-shape in plan view. Fuel tank 40
The upper and lower halves are combined by seams 40a forming a mating surface. Seams 40a are attached to the outer peripheral surfaces of the front, rear, left and right side walls.
Is protruding.

A fuel filler port 40b protrudes from the center of the rear part of the upper wall, a lid 41 closes the fuel filler port 40b, and a fuel gauge 42 is attached to the front part of the upper wall so as to protrude slightly upward. .
The lower half of the fuel tank 40 is inserted into the U-shaped bent rear subframe 10 from above, and the right and left seam portions 40a
Of the rear seam 40a is supported by the left and right support brackets 19, 19,
It is supported in contact with 20. The rear seam portion 40a is fixed to the support bracket 20 by being directly tightened with bolts 43 and nuts 44.

A helmet storage box 50 is supported on the rear frame 5. The helmet storage box 50 has a substantially rectangular upper opening,
a and a downward extension thereof, a front inclined bottom wall 50b and a rear inclined bottom wall 50c form a box formed by a bottom wall which is tapered and bulged in a side view, and an upper end of the rear side wall 50a extends rearward to form an eave.
51 are formed.

The eave portion 51 has a central portion 51a bulging upward in a substantially rectangular shape so as to cover the front portion of the fuel tank 40 from above, and is open at the lower and rear sides. The lower ends of the left and right side walls extend outward. Protruding horizontal flanges 51b are formed.

The eave portion 51 covers the front portion of the fuel tank 40, and leakage of fuel or the like at the time of refueling prevents the helmet storage box 50 from refueling.
Prevents intrusion into the interior. The upper center of the front side wall 50a of the helmet storage box 50 extends forward to form a bearing 52 at the front end.

At the front inclined bottom wall 50b of the tapered swelling bottom wall of the helmet storage box 50, there is formed a mounting portion 53 which is depressed downward at the front left and right, and the rear inclined bottom wall 50c is provided with the mounting portion 53. A mounting portion 54 that is recessed downward is formed on the left and right of the center, and a recess 55 for storing a tool having a shallow bottom is formed above the mounting portion 54.

In the helmet storage box 50, a full-face type helmet 80 is inserted with the jaw 80a first and the opening / reception opening 80b of the head along the rear inclined bottom wall 50c, as shown in FIG. As described above, the jaw portion 80b is housed by being inserted into the bottom wall concave portion bulging downward.

The helmet storage box 50 has a bottom wall that is tapered and swelled, and the left and right rear frame horizontal portions 5a, 5a.
The fuel tank 40 is inserted into the recess 15 formed between the a and the eave portion 51 so as to cover the front portion of the fuel tank 40 (the eave portion 51 has an opening at the center, and the upper part of the fuel gauge 42 projects from the opening. The left and right mounting portions 53 of the front inclined bottom wall 50b are mounted at predetermined mounting locations of the cross plate 7 via the mount rubber 56, and the left and right mounting portions 54 of the rear inclined bottom wall 50c are attached. It is mounted via a mount rubber 57 on a support bracket 18 protruding from the cross pipe 8, and the left and right flanges 51 b of the eaves 51 are placed on the seam 40 a of the fuel tank 40 mounted on the support bracket 19. Is mounted via the mount rubber 58.

The mount rubbers 56, 57 and 58 are mounted together with the mounting portions 53 and 54 and the flange 51b with the cylindrical collars 60, 61 and 61, respectively.
62 penetrates and the lower end thereof is abutted to each of the cross plate 7, the support bracket 18, and the seam portion 40a of the fuel tank 40 via a washer, and the collars 60, 61, 62 are bolted 63, 64, 65 are inserted, and the ends of the bolts 63, 64, 65 penetrating the cross plate 7, the support bracket 18, the seam portion 40a and the support bracket 19 are nuts.
Screwed to 66, 67, 68.

In this manner, the helmet storage box 50 is provided with left and right and eaves portions before and after the bottom walls 50b and 50c, respectively.
Right and left of 51 are mount rubbers 56, 57, 58 on rear frame 5.
Elastically supported through bolts 63, 64, 65 and nuts 6
Attached by 6, 67, 68.

The left and right flanges 51b of the eave portion 51 of the helmet storage box 50 are connected to the fuel tank 40 via the collar 62.
Bolts 65 on the support bracket 19 together with the seam 40a of
Fastened together by nut 68. Therefore, the number of parts is reduced and assembly is facilitated.

A long tandem seat extends back and forth so as to cover the helmet storage box 50 and the fuel tank 40.
70 is provided. The tandem seat 70 is provided with a cushion material 72 on a bottom plate 71, and the bottom plate 71 is a driver's seat side front half.
71 a forms a lid for closing the opening of the helmet storage box 50, and the rear half 71 b on the passenger seat side covers the upper part of the fuel tank 40.

A bracket 73 projecting from the front of the bottom plate 71
However, the tandem seat 70 swings up and down to open and close the helmet storage box 50 by being supported by a bearing 52 projecting from the upper center of the front side wall 50a of the helmet storage box 50 via a support shaft 74. it can.

On the lower surface of the rear half 71b of the bottom plate 71 slightly behind the center, supporting rubbers 75, 75 are fixed to the left and right so as to avoid the fuel supply lid 41 of the fuel tank 40, and the tandem sheet 70 swings downward. When the helmet storage box 50 is closed, the support rubbers 75 contact the upper surface of the fuel tank 40 to elastically support the rear part of the tandem seat 70.

As described above, the front end of the tandem seat 70 is pivotally supported by the front end of the helmet storage box 50 via the support shaft 74, and the rear portion is elastically supported by the fuel tank 40 via the support rubber 75. A seat lock device 77 is attached to a pair of left and right support brackets 21, 21 projecting from the rear portion of the rear subframe 10, and is bent into a U-shape vertically extending from the rear end of the bottom plate 71 of the dandem seat 70. The lock pin 76 is locked (see FIG. 1).

Since the helmet storage box 50 itself is elastically supported by the rear frame 5 via the mounting rubbers 56, 57, 58, the vibration of the vehicle body frame 2 is provided on the tandem seat 70 supported thereon. 56, 57, 5
8. The transmission of vibration is suppressed by being absorbed by the support rubber 75, and the ride comfort can be improved.

The helmet storage box 50 is supported on the pair of rear frames 5 at the front and rear of the bottom walls 50b and 50c as described above, and at the left and right of the eaves extending rearward. High support rigidity.

Since the internal combustion engine 34 is suspended below the main frame 4 and the rear fork 29 supporting the rear wheel 30 is pivotally supported on the pivot plate 12 at the lower end of the main frame 4 by the pivot shaft 28, the left and right rear Frame horizontal part 5
a, there is room to form a recess 15 below between the
Insert the tapered swelling bottom of the helmet storage box 50 into the large helmet storage box 50 with a large volume
Can be suppressed to a relatively low position.

That is, it is possible to secure a sufficient volume of the helmet storage box 50, and to keep the helmet storage box 50 at a low position, so that the tandem seat 70 supported thereon can be set to an appropriate height. it can.

When the helmet 80 is stored in the helmet storage box 50 as described above and the tandem sheet 70 is closed, the cushion material 72 swelling from the opening provided in the front half 71a which is the lid of the bottom plate 71. The helmet 80 can be fixed such that the back of the helmet 80 is pressed from above.

[Brief description of the drawings]

FIG. 1 is an overall side view of a motorcycle according to an embodiment of the present invention.

FIG. 2 is an overall side view of a vehicle body frame.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view of a main part partially omitted.

FIG. 5 is a plan view of the same.

FIG. 6 is a side view of a conventional motorcycle.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Motorcycle, 2 ... Body frame, 3 ... Head pipe, 4 ... Main frame, 5 ... Rear frame, 6 ... Gusset, 7 ... Cross plate, 8, 9 ... Cross pipe, 10
… Rear subframe, 11… Gusset, 12… Pipot plate, 13… Connecting part, 15… Recess, 16… Engine mount bracket, 17… Gusset, 18,19,20,21… Support bracket, 25… Front fork, 26 ... front wheel, 27 ... handlebar, 28 ... pivot shaft, 29 ... rear fork, 30 ... rear wheel, 31
... Rear cushion, 32,33 ... Support shaft, 34 ... Internal combustion engine, 35 ...
Vaporizer, 36 ... intake pipe, 37 ... air cleaner, 38 ... connecting pipe,
39 ... battery, 40 ... fuel tank, 41 ... lid, 42 ... fuel gauge,
43… bolt, 44… nut, 45… exhaust pipe, 46… muffler,
50: Helmet storage box, 51: Eaves, 52: Bearing, 53, 54: Mounting part, 55: Recess, 56, 57, 58 ... Mount rubber, 60, 61, 62 ... Collar, 63, 64, 65 ... Bolt , 6
6, 67, 68 ... nut, 70 ... tandem sheet, 71 ... bottom plate, 7
2 ... Cushion material, 73 ... Bracket, 74 ... Support shaft, 75 ... Support rubber, 76 ... Lock pin, 77 ... Seat lock device, 80
…Helmet.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Tomoyasu Yonemoto 1-4-1 Chuo, Wako-shi, Saitama

Claims (6)

[Claims] In a motorcycle provided with an article storage room below a seat, a main frame extends obliquely downward and rearward from a head pipe, and a pair of left and right rear frames branched right and left from an intermediate portion of the main frame. A motorcycle which extends substantially horizontally and then rises obliquely upward to form a body frame, suspends an internal combustion engine below the main frame, and supports the article storage chamber on the rear frame. Article storage room support structure. 2. An article storage room for a motorcycle according to claim 1, wherein a rear end of said main frame and a rear portion of a substantially horizontally extending portion of said rear frame are connected by a connecting member. Support structure. 3. A rear fork pivot for pivotally supporting a front end of a rear fork is provided below a rear end of the main frame, and a recess is formed between the horizontal portions of the pair of left and right rear frames, with the rear portion of the main frame as a bottom side. 3. The structure for supporting an article storage room of a motorcycle according to claim 1, wherein 4. The support structure according to claim 3, wherein a lower portion of the article storage chamber is bulged into the recess. 5. The article storage chamber supports the sheet pivotally supported by a front edge of the article storage chamber while the sheet is openably and closably covered by the article storage chamber. The article storage room support structure for a motorcycle according to any one of claims 1 to 4, wherein a rear portion of the wall and an upper portion of the rear wall are elastically supported by the vehicle body frame. 6. The structure according to claim 1, wherein the article storage chamber is a helmet storage box.