JPS6346984A - Motorcycle - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to motorcycles (including saddle-riding type tricycles and four-wheeled vehicles).

(Points to be solved by the prior art and the invention) The height and width of a completed motorcycle are determined in relation to the rigidity of the vehicle body frame, the capacity of the fuel tank, etc.

On the other hand, the engine disposed between the front and rear wheels is supported by the body frame, and the body frame supports the upper part of the front fork for suspension of the front wheels in a freely steerable manner. In motorcycles equipped with a fuel tank, the fuel tank is generally disposed astride the front part of the frame.

Therefore, in such a motorcycle, if an attempt is made to increase the rigidity of the body frame and to secure a large capacity of the fuel tank, a problem arises in that the height and width of the completed vehicle must be increased.

The present invention has been devised in view of the above circumstances, and the object of the present invention is to increase the rigidity of the vehicle body frame without changing the height and width of the completed vehicle, and to ensure a large capacity of the fuel tank. To provide a motorcycle whose fuel tank can be easily repaired, replaced, etc.

(Means for solving the clustering problem) The front part of the frame (19) is composed of an upper frame (25) and a lower frame (27), (27) spaced apart vertically, and the upper frame (25) is It is configured to be removable from the vehicle body frame (9), and the fuel tank (137) is attached to the seven-piece frame (25) to connect the upper frame (25) and lower frame (27).
.

(27).

(Function) The front part of the frame (19) is connected to the upper frame (25) and the lower frame (27), which are vertically spaced apart.
This increases the rigidity of the vehicle body frame (9).

Upper frame (25), lower frame (27), (2
7) Using the space defined by the fuel tank (13?)
is installed to ensure a large capacity of the fuel tank (137) without changing the height and width of the completed vehicle.

By removing the upper frame (25), the fuel tank (+
37) It can be taken out from the vehicle body frame (9) together with the t-upper frame (25), and the fuel tank (137)
can be easily repaired, replaced, etc.

It is also possible to restrict the vertical and horizontal movement of the fuel tank (137) using both the upper and lower frames (25), (27), and (27).
The attachment means to the Tupah frame (25) is the fuel tank (13).
7) is sufficient and can be simplified by means of regulating the movement back and forth.

(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

Figure 1 is a side view of the motorcycle, Figure 2 is a side view of the main parts, Figure 3 is a side view of the main parts of the body frame, Figure 4 is a plan view of the same, and Figure 5 is the V of Figure 3. An arrow view is shown.

(1) is a motorcycle, (3) is a front wheel, (5) is a rear wheel, (
7) is the engine, and the engine (7) connects the front and rear wheels (3).

(5) and supported by the vehicle body frame (9).

The front wheel (3) is supported by left and right front forks (11), a head pipe (13) at the front end of the body frame (9), etc., so that it can be steered freely. In the figure, (15) is the handlebar, and (17) is the front fender. .

The vehicle body frame (9) is made of aluminum alloy, and the engine (
7) Pivot connection between the frame front part (19) extending rearward from the head pipe (13) above and the rear fork (21) connected to the frame front part (13) and supporting the rear wheel (5). The rear part of the frame (23) is provided with a section.

The front part of the frame (19) includes an upper frame (25) extending diagonally backward from the top of the head pipe (13) above the engine (7), and a head pipe (13) above the engine (7). It consists of a pair of left and right lower frames (27), (27), etc. extending diagonally rearward from the lower part, and the rear part of the frame (23) is the left and right lower frames (27).

Left and right connecting plates (29) connected to (27) respectively
.

(29) etc.

When viewed from above, the upper frame (25) extends linearly rearward along the vehicle width center line (31) as shown in FIG. The lower frame (27) has a curved portion (33) extending rearward while expanding outward from the head pipe (13) in the width direction of the vehicle, and a curved portion (3
3) It has a straight part (35) that extends linearly rearward from the rear end, and a cross pipe (
37), and both the upper and lower frames (25)
, (27) are formed using a member whose cross section is in the shape of a Japanese character.

A connecting member (39) is provided at the front end of the upper frame (25).
and the connecting member (39) is detachably attached to the upper part of the head pipe (13).

As shown in FIGS. 6 and 7, the connecting member (39) has a nearly Y-shape in plan view, and has a bifurcated shape with mounting surfaces (41) and (41) facing the head pipe (13). A mounting portion (43) is provided.

To attach the connecting member (39) to the head pipe (13), align the mounting surface (41) with the mounting surface (47) of the mounting portion (45) formed on both left and right sides of the head pipe (13). Attach both mounting parts (4) with bolts (4S) and nuts (51).
3).

This is done by tightening (45).

The lower frame (27) is attached to the hello vibe (13) by welding to the head pipe (13) via the connecting members (53) and (55).

A connecting member (57) is provided at the rear end of the upper frame (25).
The connecting member (57) and the left lower frame (
27A) The rear ends are connected by a center member (59), and left and right connection plates (29), (29) are provided via the center member (59).

The center member (59) is connected to the connecting member (57).
The left and right legs (H) extend downward from the left and right sides of the upper part (81) and outward in the width of the vehicle.
5) and the connection part (
67), and a mounting piece (69) is provided vertically on the connection portion (67).

The connection member (57) and the center member (59) are connected using the side plate (71) as shown in the plan view in FIG. (61), position the side plate (71) across the right side of the upper part of the center member (81) and the side of the connecting member (57), and connect the connecting member (57) with the pole (73) and nut (75). , the top of the center member (
81), by fastening the side plates (71), the upper frame (25) is connected to the head pipe (13) (49)... and the center member (
By removing the bolt (73) for connecting to the frame (9), it can be attached to and detached from the frame (9).

A cross pipe (77) is connected between the connection part (87) of the center member (59) and the rear part of the right lower frame (27B).
), and a mounting piece (79) is hung from the right end of the cross pipe (77).

Connection play on the left (29A) is the connection part (87)
The right connecting plate (211B) is assembled by fitting the front end fitting part (not shown) to the rear end of the right lower frame (27B) and welding the fitting part. The rear end of the upper frame (25) is assembled by fitting the upper end fitting portion to the leg portion (65) and welding the fitting portion. Therefore, the rear end of the upper frame (25) is attached to the center member. (59) to the left and right lower frames (27),
(27) is connected to the rear end. Left and right legs (83),
(85) is offset back and forth, and the left leg (63)
The carburetor (115) can be easily adjusted from the rear.

Left and right connection play) (29) and (29) are the extension parts (81) that extend rearward from the lower frames (27) and (27) in an almost continuous manner, and the rear end of the extension part (81). It includes a lower portion (83) extending downward.

Bipot 7 shafts (85) are installed horizontally in the upper and lower intermediate parts of the left and right lower parts (83), (83), and the lower parts (83), (83)
The lower ends of 3) are connected by a cross via' (87), and bifurcated mounting parts (89) are provided on both sides of the front of the cross via' (87) (7) to protrude forward, and a mounting piece (89) is provided at the rear of the cross via' (87). θ1), (
91) is provided protruding rearward.

(33) is an engine hanger with 1 engine bunker (8
3) is provided between the mounting pieces (89), (79) and the bifurcated mounting portions (89), (89).

The engine hanger (93) is composed of a pair of left and right members that are hollow and rectangular in cross section.
), the upper end is attached to the mounting pieces (89) and (79))
(95), an upper part (97) connected with a nut and extending downward and diagonally forward, a curved part (9th) connected to the lower end of the upper part (97), and a curved part (98) rearward from the rear end. The rear end extends to the forked portion (8θ), and the bolt (+
01), with a rear part (103) fastened with a nut.

A rod (105) is installed horizontally between the upper ends of the curved part (99), and a rod (107) is installed between the front ends of the rear part (103).
) is installed horizontally.

In the embodiment, the engine (7) is a two-stroke single-cylinder engine in which the cylinder (+09) is protruded diagonally forward from the front part of the crankcase (111). The lower part of the crankcase (111) is rigidly mounted on the rod (105) and the rod (+07), respectively, and mounted on the vehicle body frame (8).

The intake pipe (
113) is protruding, and the intake pipe (eye 3) is equipped with a carburetor (+15
).

An air cleaner (117) is installed in series.

The exhaust pipe (119) is provided to protrude forward from the front part of the cylinder (109), has a chamber (12+) interposed in the middle part to send the exhaust to the rear, and has a muffler (+23) connected to the rear end.

The rear fork (21) has its front end connected to the pivot shaft (85).
The rear end of the rear fork (21) is pivotally connected to the rear wheel (5).
), and the engine power drives the rear wheels (5) via the chain (125).

A progressive link mechanism (+27) is provided between the front part of the rear fork (21) and the mounting pieces (91) of the vehicle body frame (9), and the progressive link mechanism (127) is provided between the vehicle body frame (8) and the progressive link mechanism (127). The rear wheel (5) is suspended and supported by a shock absorber (129) interposed therebetween.

The shock absorber (129) has an upper mounting piece (131) attached to a bifurcated mounting portion (133) defined by the rear end of the upper bracket (61) and the rear end of the side plate (71) with a bolt (135). Attach with a nut.

The fuel tank (137) is arranged in a space defined between the upper frame (25), the drawer frame (27), (2?), and the fuel tank (137) is located between the upper frame (25) and the drawer frame (27).
and the frame (9) together with the upper frame (25).
) to be removable.

The fuel tank (137) is shown in Fig. 9 in a side view, Fig. 1O in a front view, Fig. 11 in a plan view, and Fig. 12 in Fig. 9.
As shown in the cross-sectional view along the line -■, the left and right side portions (139), (14) whose outer ends extend rearward approximately along the lower frame (27) on the left and right lower frames (27), (27).
1) and a connecting part (143) that connects the side parts (139) and (141), and the cross section has a concave shape,
A recessed portion (14, 5) extending back and forth is defined between the left and right side portions (139) and (141).

The upper frame (25) is arranged in the recess (i45), and a mounting piece (
147) to the upper frame (25
), and an elastic material (151) is interposed between the rear part of the bottom of the recess (145) and the bottom of the upper frame (25), and the lower both sides of the rear part of the fuel tank (13?) are attached to the lower frame (27). An elastic material (153) is interposed on the upper surface (27^) and the inner surface (27B), respectively, to elastically engage the upper surface (27^) and the inner surface (27B),
Mounting piece (147) controls the movement of the fuel tank (137) back and forth.
The elastic material (151), (
153).

Upper frame (25), lower frame (2?),
(27) and is assembled to the vehicle body frame (3).

The filler port (155) of the fuel tank (137) is located on the left side (1
A tube body (15) provided at the front end of the upper surface of the left side portion (139) and protruding inward from the front end and upper end portion of the inner surface of the left side portion (139).
7) and a pipe body (159) protruding inward from the front end and upper end portion of the inner surface of the right side (141) are connected with a tube (iei) above the upper surface of the 7-piece frame (25). body (157), (159), tube (1θ
1), air is removed from the right side (141) during refueling, and (183) in the figure shows a concave surface corresponding to the exhaust pipe (119).

(185) is a radiator, and the radiator (185) includes the left and right lower frames (27), the mounting pieces (1137) and (1B?) formed on the lower surface of (27), and the curved part of the right engine hanger (83). (99) Attach to the frame (8) using the mounting piece (IE19) formed on the front surface.

The radiator (185) consists of a main radiator (+71) placed on the right side and a sub radiator (+7) placed on the left side.
3) and two radiators (171) for cooling water.
, (173) and main radiator (171).
) The chamber (12+) is disposed below the subradiator (173) on the left side of the subradiator (173).

From the rear end of the upper frame (25) to the center member upper part (61), there is a bolt insertion hole (17) in the side plate (71).
5) Extend the pair of left and right seat rails (183) rearward by aligning them with the bolts (181) inserted through (1, 77), and attach the muffler (123) at the left rear end of the seat rails (183). To support.

A back vibe (185) extends obliquely forward and downward from the rear of the left and right seat rails (183), and the lower end of the back vibe (185) is connected to the rear frame (23).
The left and right back vibes (185), (185
) are arranged with different inclinations in the front and rear, and the seat (18
? ) is a locking device (
191) to the locking pieces (193) raised on the upper surface of the upper frame (25), and attach the mounting pieces (195) hanging from both sides of the rear of the seat bottom plate (IH) to the seat rails (195). 183), (183) The hook between the rear sections is attached to both ends of the cross member (197)) (19
9), assemble it to the frame (9), and attach the seat bottom plate (
189) are placed on the upper frame (25) and sea rail (183), respectively, and assembled to the vehicle body frame (9).

This embodiment is configured as described above, and the front part of the frame (19)
The body frame (9) is constructed of one upper frame (25) spaced apart vertically and two lower frames (27) on the left and right sides, thereby increasing the rigidity of the vehicle body frame (9).

Also, upper frame (25) and lower frame (27)
, (2?) to utilize the space defined by the fuel tank (1?).
37), the fuel tank does not protrude significantly above the body frame like in the past, and the capacity of the fuel tank (137) is secured without changing the height of the completed vehicle or #A. can do.

In addition, the upper frame (25) is removably assembled to the vehicle body frame (9), and the fuel tank (+37) is attached to and arranged on the upper frame (25). ), the fuel tank (137) can be taken out from the body frame (9) along with the 7-piece frame (25), and the fuel tank (+37) can be removed from both the upper and lower frames (25), (27),
(27) Despite being installed in the space between the fuel tank (
137) can be easily repaired, replaced, etc.

Also, upper frame (25) and core frame (27)
, a fuel tank (+37) is placed in the space defined by (27)
), both frames (25) are arranged as in the example.
.

(27) and (27) to fill the fuel tank (137
) above and below.

It is also possible to restrict the movement from side to side, and therefore, the means for attaching the fuel tank (137) to the upper frame (25) is a means for restricting the movement from side to side of the fuel tank (137).
(149) etc. are sufficient and can be simplified.

In the embodiment, a case was explained in which the frame front part (19) was composed of one seven-piece frame (25) and two lower frames (27), (27) spaced apart vertically, but the upper frame (25) and lower frame (27)
The number is not limited to the number in the embodiment and is arbitrary.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, the rigidity of the vehicle body frame can be increased without changing the height or width of the completed vehicle.
A large capacity of the fuel tank can be ensured, and the fuel tank can be easily repaired or replaced.

[Brief explanation of the drawing]

Figure 1 is a side view of the motorcycle, Figure 2 is a side view of the main parts, Figure 3 is a side view of the main parts of the body frame, Figure 4 is a plan view of the same, and Figure 5 is the V of Figure 3. 6 is a side view showing the mounting structure of the head pipe and the front end of the frame, FIG. 7 is a plan view of the same, FIG. 8 is a plan view of the connecting member and center member in a connected state, and FIG. 9 is a side view showing the mounting structure of the head pipe and the front end of the frame. A side view of the tank, Figure 10 is the same front view, and Figure 11 is the same plan view! FIG. 812 is a sectional view taken along the line II in FIG. 9. In addition, (1) in the drawing is a motorcycle, (3) is a front wheel, and (5)
is the rear wheel, (7) is the engine, (8) is the body frame, (
15) is a handle, (21) a fork, (25)
is the upper frame, (27) is the lower frame, (
29) is a connection plate, and (13?) is a fuel tank. Figure 11 Figure 12 Figure 11

Claims (1)

[Scope of Claims] An engine disposed between the front and rear wheels is supported by a vehicle body frame, and the vehicle body frame extends rearward above the engine from a head pipe that supports the upper part of a front fork for suspension of the front wheels in a freely steerable manner. In the motorcycle, the front part of the frame is comprised of an upper frame and a lower frame spaced apart from each other in the vertical direction, and the upper frame is attached to the body frame. A motorcycle characterized in that the fuel tank is configured to be detachable from the upper frame, and the fuel tank is attached to an upper frame and disposed in a space defined by the upper frame and the lower frame.