JP3758392B2 - Radiator mounting connection structure for motorcycles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention automatically installs and connects a radiator mounted so as to cover the front upper part of the cylinder head of the forward tilting cylinder of the engine so that the inspection and replacement of the spark plug of the forward tilting cylinder can be easily performed. The present invention relates to a radiator mounting connection structure for a motorcycle.
[0002]
[Prior art]
In a motorcycle equipped with a front and rear V-type engine, the radiator is generally arranged so as to cover the front upper side of the cylinder head (cylinder head cover) of the front cylinder (forward tilt cylinder) of the front and rear V-type engine. The upper and lower parts of the radiator are fixed to the body frame and the engine, respectively, and the radiator and the engine side are connected by a radiator hose having a minimum length. The gap between the radiator and the cylinder head is so narrow that no tools can be inserted in order to make the wheelbase as short as possible.
[0003]
In addition, in the radiator mounting structure disclosed in Japanese Utility Model Publication No. 61-67022, the upper end of the radiator is rotatably connected to the body frame, and the lower end of the radiator is connected to the body frame so as to be freely disengaged. In addition, a cooling water outlet at the lower end of the radiator is detachably connected to a cooling water circulation path formed in the vehicle body frame via an on-off valve.
[0004]
[Problems to be solved by the invention]
A spark plug is mounted on the cylinder head side of the engine. However, with the above-mentioned general radiator mounting and connection structure, the spark plug of the front cylinder cannot be removed in the same state. It is necessary to drain the cooling water from the radiator, remove the radiator hose, and remove the radiator.
[0005]
On the other hand, in the radiator mounting structure disclosed in Japanese Utility Model Laid-Open No. 61-67022, it is necessary to form a cooling water circulation path in the vehicle body frame and to provide an on-off valve. Therefore, the structure becomes complicated and the cost increases. In addition, there is a problem that it can be applied only to a cradle type body frame.
[0006]
In view of such problems, the present invention is designed so that the radiator disposed so as to cover the front upper side of the cylinder head of the forward tilt cylinder of the engine can be easily inspected, replaced, etc. of the spark plug of the forward tilt cylinder. An object of the present invention is to provide a radiator mounting connection structure for a motorcycle that can be mounted and connected with a relatively simple structure.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, an engine having a forward tilt cylinder disposed forwardly and an upper portion is supported to be rotatable in the front-rear direction with respect to the body frame, and a lower portion is supported by the body frame or the engine. comprising a radiator removable to Ru is fixed, is longer than the length required to connect the lower and the engine side of the radiator, a radiator hose that will be mounted extendable curved to straight against In the radiator mounting connection structure of a motorcycle, a water pump is fixed to an upper part of the crankcase of the engine, and the radiator hose connecting the water pump and the lower part of the radiator is disposed along the forward tilt cylinder in a side view. A radiator mounting connection structure for a motorcycle, characterized by having a substantially straight portion .
[0009]
Further, in the invention described in claim 2, wherein the engine is a longitudinal V-type engine, the anteversion cylinder is offset laterally on one side, the radiator hose, opposite to the offset side of the anteversion cylinder a lateral side, that is disposed below the frame supporting the stretched engine rearward and downward from the head pipe.
[0010]
Further, in the invention described in claim 3, radiator hoses, that are attached curved in the form of projecting the intermediate portion laterally inward.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a left side view of a motorcycle to which a radiator mounting connection structure according to an embodiment of the present invention is applied. Fig.2 (a) is a right view which shows the attachment connection structure of the radiator in FIG. 1, FIG.2 (b) is A arrow view of the lower radiator hose in Fig.2 (a). 3 is a left side view of the radiator mounting connection structure of FIG. 2, and FIG. 4 is a front view thereof.
[0012]
As shown in FIG. 1, a motorcycle to which a radiator mounting connection structure according to an embodiment of the present invention is applied includes a backbone-type body frame, which includes a front-end head pipe 11 and a head pipe. 11, a truss frame (side rail) 12 that is divided into two sides on the left and right sides and extends rearward and downward, a body frame 13 that protrudes substantially downward from the rear end of the truss frame 12, and the like. The truss frame 12 includes an upper extension portion 12a, a lower extension portion 12b, intermediate reinforcement portions 12c, 12c, and the like. The truss frame 12 has a large vertical height relative to the thickness in the left-right direction, and the upper extension portion 12a, A space between the lower extended portion 12b and the intermediate reinforcing portions 12c and 12c is opened in a window shape.
[0013]
A steering wheel 15 is supported by the head pipe 11 of the vehicle body frame so as to be steerable left and right, and the front wheel 1 is rotatably supported via a front fork 16 below the steering wheel 15. A handle bar 17 is provided at the top of the. A swing arm 18 is connected to the lower rear side of the body frame 13 via a pivot 18a so as to be swingable up and down. A rear wheel 2 is connected to the rear side of the swing arm 18 by an engine 20 described later. It is rotatably supported in a driven form. Further, a seat rail (not shown) is provided to extend rearward on the upper rear side of the body frame 13, and a front seat 7 and a rear seat 8 are supported on the upper side of the seat rail. .
[0014]
In front of the body frame 13, a four-stroke V-type two-cylinder engine 20 is mounted horizontally in a form supported by the truss frame 12 and the body frame 13 via support bolts 20a, 20a. As shown in FIG. 2 (a), the engine 20 is provided with a front cylinder 23 and a rear cylinder 24 at an included angle (V bank angle) of about 90 °. The front cylinder 23 is offset to the left and the rear cylinder 24 is offset to the right. When mounted on the vehicle body, the front cylinder 23 is disposed below the truss frame 12 in a state of being largely inclined forward (inclined forward by about 60 °), and the rear cylinder 24 is relatively vertical. It is arranged between the left and right truss frames 12 in a state (a state inclined about 30 ° rearward).
[0015]
A front carburetor 27 is mounted on the upper side (V bank side) of the front cylinder 23 via an intake pipe 27a, and a rear carburetor 28 is mounted on the front upper side (V bank side) of the rear cylinder 24. It is mounted via an intake pipe 28a. The front carburetor 27 and the rear carburetor 28 are arranged in alignment with the centers of the front cylinder 23 and the rear cylinder 24, respectively. Therefore, the front carburetor 27 and the rear carburetor 28 are offset to the right side and the left side, respectively. Yes. Further, the front carburetor 27 is disposed between the left and right truss frames 12, and the rear carburetor 28 is disposed above the truss frame 12. An air cleaner 50 is disposed above the carburetors 27 and 28, and a fuel tank 60 is mounted above the truss frame 12 so as to cover the air cleaner 50 from above, from the side, and from the rear. Yes.
[0016]
As shown in FIGS. 2 to 4, the radiator 30 covers the truss frame 12 so as to cover the front upper side of the cylinder head (cylinder head cover) 23 a of the front cylinder 23 below the front portion of the truss frame 12 and in front of the engine 20. It is mounted in a form supported by the frame 12 and the engine 20. That is, brackets 31, 31 are fixed to the left and right sides of the upper surface of the radiator 30 so as to protrude upward. Has been. A bracket 32 protrudes downward and is fixed to an intermediate portion on the lower surface of the radiator 30. The bracket 32 is fastened to the cylinder head 23a of the front cylinder 23 via a mounting bolt 32a and the like.
[0017]
As shown in FIG. 3, the front end of the upper radiator hose (high temperature side radiator hose) 38 is connected to the cooling water inlet 33 a at the upper end of the inlet side tank 33 at the right end of the radiator 30 (offset side of the front cylinder 23). The upper radiator hose 38 extends rearward above the front cylinder 23 and on the left side of the front carburetor 27, and the rear end of the upper radiator hose 38 is a cooling water outlet portion of the thermostat 26 (engine 20 side). It is connected to the. The thermostat 26 is disposed between the front cylinder 23 and the rear cylinder 24, and the cooling water inlet portion of the thermostat 26 is connected to the cooling water outlet of the water jacket of the engine 20 via the connector hoses 25, 25. .
[0018]
As shown in FIG. 2 (a), the lower radiator hose (low temperature side) is provided at the cooling water outlet 34a at the lower end of the outlet side tank 34 at the left end of the radiator 30 (on the side opposite to the offset side of the front cylinder 23). The front end of the radiator hose 39 is connected, the lower radiator hose 39 extends rearward with the right side arrangement of the front cylinder 23, and the rear end of the lower radiator hose 39 is connected to the water pump 22 (engine side). It is connected to the cooling water inlet 22a.
That is, since the front cylinder 23 is offset to the left side, the lower radiator hose 39 can be disposed by effectively using the space on the right side of the front cylinder 23.
The radiator hose 39 is disposed on the side opposite to the offset side of the front cylinder 23 in the forward inclined state, and is disposed below the truss frame 12 that extends rearward and downward from the head pipe 11 and supports the engine 20.
The water pump 22 is fixed to the right side and the upper part of the crankcase 21 and communicates with the cooling water inlet of the water jacket of the engine 20. A radiator cap 35 is provided at the upper end of the outlet side tank 34 at the right end of the radiator 30.
[0019]
The lower radiator hose 39 is made of a flexible rubber material that can be bent and extended, and is extended in a straight line shape of the lower radiator hose 39 as shown in FIG. The length L ₂ is the minimum length required for connection between the cooling water outlet 34 a of the radiator 30 and the cooling water inlet 22 a of the water pump 22 (the cooling water outlet 34 a of the radiator 30 and the water pump 22 It is formed longer than the distance substantially the same length) L ₁ between the cooling water inlet portion 22a.
As shown in FIGS. 2 and 4, the lower radiator hose 39 has a middle portion that is curved and mounted in a U-shape protruding leftward (laterally inside) with respect to the front and rear ends. The intermediate portion of the radiator hose 39 is substantially straight without being bent in the vertical direction.
The radiator hose 39 that connects the water pump 22 and the lower part of the radiator 30 is disposed with a substantially linear portion along the front cylinder 23 in the forward inclined state in a side view.
Note that only the lower radiator hose 39 is disposed between the cooling water outlet 34a of the radiator 30 and the cooling water inlet 22a of the water pump 22, and the lower radiator hose 39 can be extended linearly. .
[0020]
A reserve tank 40 is disposed on the right side of the front carburetor 23 and on the left side (laterally inward) of the right truss frame 12. That is, since the front cylinder 23 and the front carburetor 27 are offset to the left side, the reserve tank 40 having a sufficient capacity can be arranged by effectively using the space on the right side of the front carburetor 27. The reserve tank 40 can be protected by the frame 12. And the main body 41 of the reserve tank 40 is the shape extended diagonally from the front upper side to the rear lower side along the lower extension part 12b of the truss frame 12, and the vertical height is higher than the height of the lower extension part 12b. The front and rear lengths are longer than the interval between the intermediate reinforcing portions 12c and 12c, and the upper intermediate portion of the main body 41 includes the upper extending portion 12a, the lower extending portion 12b, and the intermediate reinforcing portion 12c of the truss frame 12. , 12c is exposed from the window-like opening portion.
[0021]
A cylindrical water supply part 42 protruding upward from the main body 41 is provided at the front upper part of the reserve tank 40, and the water supply part 42 is provided between the air cleaner 50 and the upper extension part 12 a of the truss frame 12. The water supply port (cap 43) at the upper end of the water supply unit 42 is arranged so as to be covered from above by the fuel tank 60 above the truss frame 12, and the cap 43 is detachably attached to the water supply port. It is attached to. In addition, the fuel tank 60 is supported by the rear end portion so as to be rotatable up and down so as to be opened and closed by moving the front side up and down. One end of an overflow hose 47 is connected to the rear lower end portion of the reserve tank 40, the overflow hose 47 extends forward and upward, and the other end of the overflow hose 47 is connected to the radiator cap 35.
[0022]
In the radiator mounting and connecting structure configured as described above, the cooling water of the engine 20 is supplied from the cooling water outlet of the water jacket to the connector hoses 25 and 25, the thermostat 26, the upper radiator hose 38, the radiator 30, and the lower radiator hose 39. Then, the water is circulated back to the cooling water inlet of the water jacket via the water pump 22. At this time, the intermediate portion of the lower radiator hose 39 is curved so as to protrude laterally inward and is substantially linear in the vertical direction, so that air accumulates in the curved intermediate portion of the lower radiator hose 39, and the air It is possible to prevent the omission from becoming worse.
[0023]
When inspecting or replacing the spark plug of the front cylinder 23, the lower mounting bolt 32a of the radiator 30 is removed, the upper mounting bolts 31a and 31a of the radiator 30 are loosened, and the lower radiator hose 39 is straightened. The lower portion of the radiator 30 is moved forward in such a manner that the radiator 30 is extended forward, and the radiator 30 is rotated forward about the upper mounting bolts 31a and 31a. Then, since the gap between the cylinder head 23a of the front cylinder 23 and the radiator 30 is enlarged, a tool such as a plug wrench can be inserted into the gap between the cylinder head 23a and the radiator 30, and the radiator hose 39, the radiator 30, etc. Even if it is not removed, operations such as inspection and replacement of the spark plug of the front cylinder 23 can be easily performed.
[0024]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. For example, in the above-described embodiment, the case where the upper portion of the radiator is fastened to the truss frame via the mounting bolt has been described. However, the upper portion of the radiator may be rotatably supported. In the above-described embodiment, the lower radiator hose is described as being bent in such a manner that the intermediate portion protrudes inwardly. However, the intermediate portion is bent in such a manner as to protrude outwardly, upwardly, and downwardly. You may do it. Moreover, although the case where it applied to the horizontal V type engine was described in the above-mentioned embodiment, it is applicable also to a horizontal series engine etc. with a large forward tilt angle.
[0025]
【The invention's effect】
According to the first aspect of the present invention, the fixing of the lower portion of the radiator is released, and the lower portion of the radiator is moved forward by extending the radiator hose in a straight line. Therefore, when inspecting or replacing the spark plug of the forward tilt cylinder, it is not necessary to remove the radiator hose, the radiator, etc., and the operation can be easily performed.
[0026]
According to the invention described in claim 2, the radiator hose can be arranged in a curved state by effectively utilizing the space on the side of the forward tilt cylinder. Further, according to the third aspect of the present invention, it is possible to prevent the air from accumulating in the curved portion of the radiator hose and causing the air to escape.
[Brief description of the drawings]
FIG. 1 is a left side view of a motorcycle to which a radiator mounting connection structure according to an embodiment of the present invention is applied.
FIG. 2 is a right side view (a) showing the attachment and connection structure of the radiator in FIG. 1, and an A arrow view (b) of the lower radiator hose.
FIG. 3 is a left side view of the radiator mounting connection structure of FIG. 2;
4 is a front view of the radiator mounting connection structure of FIG. 2; FIG.
[Explanation of symbols]
1 Front wheel 2 Rear wheel 7 Front seat 8 Rear seat 11 Head pipe (body frame)
12 truss frame (body frame)
12a Upper extension part 12b Lower extension part 12c Intermediate reinforcement part 13 Body frame (body frame)
15 Steering 16 Front fork 17 Handle bar 18 Swing arm 18a Pivot 20 Engine 20a Support bolt 21 Crankcase 22 Water pump 22a Cooling water inlet 23 Front cylinder 23a Cylinder head 24 Rear cylinder 25 Connector hose 26 Thermostat 27 Front carburetor 27a Intake pipe 28 Rear carburetor 28a Intake pipe 30 Radiator 31 Bracket 31a Mounting bolt 32 Bracket 32a Mounting bolt 33 Inlet side tank 33a Cooling water inlet portion 34 Outlet side tank 34a Cooling water outlet portion 35 Radiator cap 38 Upper radiator hose 39 Lower radiator hose 40 Reserve tank 41 Main body 42 Water supply part 43 Cap 47 Overflow hose 50 Air Leaner 60 fuel tank

Claims (3)

An engine having a forward-tilting cylinder disposed forwardly ;
Is rotatably supported in the longitudinal direction an upper with respect to the vehicle body frame, a radiator that will be removable secured to the body frame or the engine lower,
Is longer than the length required to connect the lower and the engine side of the radiator, the radiator mounting connecting structure of a motorcycle and a radiator hose that will be mounted in extendable curved linearly,
A water pump is fixed to the upper crankcase of the engine,
A radiator mounting connection structure for a motorcycle, wherein the radiator hose connecting the water pump and a lower portion of the radiator is disposed with a substantially linear portion along the forward tilt cylinder in a side view. . The engine is a longitudinal V-type engine, the anteversion cylinder is offset laterally on one side, the radiator hose is a lateral side opposite to the offset side of the anteversion cylinder, rearward and downward from the head pipe The radiator mounting connection structure for a motorcycle according to claim 1, wherein the radiator mounting connection structure is disposed below a frame extending and supporting the engine . The radiator mounting connection structure for a motorcycle according to claim 1 or 2, wherein the radiator hose is mounted in a curved manner so that an intermediate portion protrudes laterally inward.

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