JP3569595B2 - Body structure of scooter type vehicle - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a front pipe having a head pipe for supporting a front fork in a steerable manner, an inclined portion extending rearward and downward from the head pipe, and a rear extension portion extending substantially horizontally and rearwardly connected to the rear end of the inclined portion. The present invention relates to a vehicle body structure of a scooter type vehicle in which a frame and a rear frame extending rearward from a rear end of the front frame are integrally formed, and an article storage container is attached to the rear frame.
[0002]
[Prior art]
Conventionally, such a vehicle body structure is already known, for example, from Japanese Patent Application Laid-Open No. Hei 7-156852.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional device, a support portion for supporting a bottom portion of an article storage container for storing a helmet or the like is provided on a rear frame. For this reason, in order to secure the strength for supporting the load of the occupant sitting on the seat disposed above the article storage container in the support portion, a necessary section modulus is secured in the support portion. Of the article storage container, that is, the height of the sheet, that is, the sheet height, is increased, or the weight is increased.
[0004]
The present invention has been made in view of the above circumstances, and has as its object to provide a body structure of a scooter-type vehicle in which the strength of a rear frame is increased by lowering the height of the upper end of an article storage container. .
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 includes a head pipe for supporting a front fork in a steerable manner, an inclined portion extending rearward and downward from the head pipe, and a rear end of the inclined portion which is substantially connected to the rear end. A vehicle body of a scooter-type vehicle in which a front frame having a rear extension extending horizontally and rearward and a rear frame extending rearward from the rear end of the front frame are integrally formed, and an article storage container is attached to the rear frame. In the above structure, the rear frame is provided with a storage recess having an upper side opened around the periphery of a side wall rising upward, and at least a part of the storage recess is stored in the storage recess so that the article storage container is attached to the rear frame. Features.
[0006]
According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the left and right walls of the storage recess form an inner plate forming an inner side surface of the storage recess, and an outer side of the inner plate. An outer plate, which is arranged at an interval, and a connecting plate that connects between upper ends of the inner plate and the outer plate, are formed in a substantially U-shaped cross-sectional shape opened downward, and the left, The upper end of the rear cushion is connected to the rear frame at a position close to one of the right side walls.
[0007]
The invention according to a third aspect is characterized in that, in addition to the configuration of the first or second aspect, an engine hanger bracket is integrally provided on the rear frame.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described based on an embodiment of the present invention shown in the accompanying drawings.
[0009]
1 to 12 show an embodiment of the present invention. FIG. 1 is a side view of a scooter type vehicle, FIG. 2 is a plan view of a scooter type vehicle, FIG. 3 is a side view of a body frame, and FIG. FIG. 5 is an enlarged sectional view taken along line 5-5 of FIG. 1, FIG. 6 is an enlarged vertical sectional side view taken along arrow 6 of FIG. 1, FIG. 7 is a sectional view taken along line 7-7 of FIG. 6 is a sectional view taken along line 8-8 in FIG. 6, FIG. 9 is a longitudinal sectional side view showing an enlarged view of a connecting portion of the rear cushion to the vehicle body frame, FIG. 10 is an enlarged longitudinal sectional side view taken along arrow 10 in FIG. 10 is an enlarged sectional view taken along line 12-12 of FIG. 10, and FIG. 12 is an enlarged sectional view taken along line 12-12 of FIG.
[0010]
First, in FIG. 1 and FIG. 2, the body frame 15 of the scooter type vehicle includes a head pipe 16 at its front end, a front fork 18 to the front wheel W _F is rotatably supported to the lower end provided with a steering handle 17 at the upper end It is supported by the head pipe 16 as steerable.
[0011]
The power unit 20 including the engine and the continuously variable transmission includes a casing 21 which also functions as a crankcase of the engine and a transmission case of the continuously variable transmission. The casing 21 is suspended from the body frame 15 via a link mechanism 22. A rear cushion 23 is provided between the casing 21 and the body frame 15. The rear wheel W _R is rotatably supported to the rear portion of the casing 21.
[0012]
The vehicle body frame 15, which is covered with a body cover 24 except for a part thereof, the body cover 24 includes a front cover 25 for covering the upper portion of the front and the front wheel W _F of the head pipe 16, the front cover 25 A leg shield 26 joined to the front of the occupant to cover the front of the occupant's leg; floor panels 27 connected to the leg shield 26 to support the occupant's feet; An undercover 28 connected to the front cover 25 and joined to both floor panels 27 so as to cover both sides of the vehicle body below the rear body 29, and a rear cover 29 joined to the floor panels 27 covering the left and right sides of the rear body. The seat 30 on which the occupant sits is provided on the rear cover 29.
[0013]
3 and 4, the vehicle body frame 15 is configured such that a sub-frame 32 is fastened to a rear end portion of a main frame 31. The main frame 31 includes a front frame 33 integrally having the head pipe 16 and a rear frame 34 connected to the rear end of the front frame 33. The main frame 31 is integrally formed by casting a light alloy such as an aluminum alloy, or has a long glass fiber or carbon fiber. It is formed by integral molding of a synthetic resin reinforced with a long fiber reinforcing material such as long fibers.
[0014]
Referring also to FIG. 5, the front frame 33 includes a head pipe 16, an inclined portion 35 extending downward from the head pipe 16, and a rearward portion extending substantially horizontally and rearwardly connected to the rear end of the inclined portion 35. Extending portions 36 are provided integrally with stays 37 which extend relatively long in the front-rear direction and extend to both sides on both left and right sides of the inclined portion 35 and the rear extending portion 36 of the front frame 33. The floor panels 27 are fixedly supported on the upper surfaces of the stays 37, respectively. A plurality of nuts 38 contacting and engaging with the lower surfaces of the stays 37, respectively, and the nuts are provided. The floor panels 27 are fastened to the stays 37 by the bolts 39 screwed into the stays 38.
[0015]
Incidentally, the front frame 33 is formed so as to have an upwardly bulging portion 33a having a substantially U-shaped cross section at the center in the left-right direction, and the stays are provided at both left and right lower ends of the bulging portion 33a. 37 are integrally provided. Further, on both left and right sides of the front frame 33, there are provided stepped portions 33b for engaging the inner edges of the floor panels 27, respectively, and the floor panels 27 are bulged above the floor panels 27. 33a are respectively supported by the stays 37 so as to expose the outside.
[0016]
A plurality of reinforcing ribs 40 are integrally provided on the lower surface of the inclined portion 35 and the rear extending portion 34 of the front frame 33, and both ends of the reinforcing member 41 extending between the left and right stays 37 are bolted by bolts 42. Fastened to the lower surfaces of both stays 37.
[0017]
Auxiliary stays 43, 44, and 45 are integrally provided at the front of the front frame 33. A battery 46, which is an auxiliary device, is attached to the auxiliary device stay 43. A horn 47 is attached, and a combination switch (not shown) is attached to the accessory stay 45.
[0018]
6, 7, and 8, the rear frame 34 is integrally connected to the rear end of the front frame 33 so as to extend rearward and upward from the rear end of the front frame 33. An article storage container 49 for storing articles such as a helmet 48 (see FIG. 1) is attached to the rear frame 34.
[0019]
The article storage container 49 is formed of a synthetic resin with an open top in a box shape, and the upper portion of the article storage container 49 is covered with a sheet 30. The seat 30 is disposed on the rear cover 29 so that the upper part of the article storage container 49 can be opened.
[0020]
The rear frame 34 is provided with a storage recess 50 having a front side wall 51, left and right side walls 52, 52 and a rear side wall 53, each of which rises upward, and which is open at the top, and an article storage container 49 is provided with the storage recess 50. At least a part is attached to the rear frame 34 so as to be housed in the housing recess 50.
[0021]
The left and right walls 52, 52 include an inner plate 52a that forms the inner side surface of the storage recess 50, an outer plate 52b that is disposed at an outer side of the inner plate 52a, and an inner plate 52a and an outer plate 52b. And a connecting plate 52c for connecting between the upper ends of the front and rear walls 51a and 51b. It is formed in an open substantially U-shaped cross section.
[0022]
Thus, a pair of mounting recesses 54 are provided at the front bottom of the storage recess 50 at left and right intervals, and a mounting recess 56 is provided at the rear bottom of the storage recess 50. On the other hand, at the bottom of the front end of the storage container 49, mounting projections 49a to be fitted into the mounting recesses 54 are provided, and the mounting projections 49a are fastened to the rear frame 34 by screw members 57. . Further, an attachment projection (not shown) projecting from the bottom end of the rear end of the storage container 49 is also fastened to the rear frame 34 in a state fitted in the attachment recess 56.
[0023]
The rear frame 34 is integrally provided with engine hanger brackets 58 hanging downward from the left and right sides of its front end, respectively. The power unit 20 is suspended from the engine hanger brackets 58 via the link mechanism 22. .
[0024]
The link mechanism 22 includes a link 60 in which a cylindrical base portion 60a and a tip portion 60b having axes parallel to each other are integrally connected via a connecting arm portion 60c. The base portion 60a is supported by a first support shaft 61 horizontally fixed to both engine hanger brackets 58 via a pair of rubber bushes 62, and a second support shaft 63 is inserted through the tip portion 60b. The second support shaft 63 is supported via a rubber bush 64 on a connecting cylinder 21 a provided on the casing 21 of the power unit 20.
[0025]
A stopper arm 65 extending to the opposite side to the connecting arm portion 60c is fixed to the base 60a of the link 60, and stopper rubbers 66 and 67 are fixed to the upper and lower surfaces of the tip of the stopper arm 65. On the other hand, a box 68 is provided integrally with the lower part of the front end of the rear frame 34, and the stopper rubbers 66 and 67 are inserted into the box 68.
[0026]
According to such a link mechanism 22, the power unit 20 can swing around the second support shaft 63, and the link 60 absorbs the vibration from the power unit 20 by the rubber bushes 62 and 64 while the first support unit 63 absorbs the vibration from the power unit 20. The swing vibration of the link 60 is attenuated by the stopper rubbers 66 and 67 and transmitted to the rear frame 34, that is, the body frame 15 side.
[0027]
The rear frame 34 is formed by integral molding by casting a light alloy such as an aluminum alloy or by integral molding by a synthetic resin reinforced with a long fiber reinforcing material such as a long glass fiber or a long carbon fiber. Due to this, the dimensional accuracy between the two engine hanger brackets 58 is hard to say high accuracy due to the influence of distortion and contraction. Therefore, in order to cope with a decrease in the dimensional accuracy between the two engine hanger brackets 58, a washer 69 for adjusting the size is interposed between the two rubber bushes 62 and the engine hanger brackets 58.
[0028]
9, 10 and 11, the rear cushion mounting portion 70 recessed downward is provided at the rear of the main frame 31, that is, at the rear of the rear frame 34 at a position close to the left side wall 52 in the storage recess 50. Is provided, and the upper end of the rear cushion 23 disposed between the main frame 34 and the power unit 20 is directly connected to the rear cushion mounting portion 70 via rubbers 79 and 80.
[0029]
The rear cushion 23 includes a hydraulic damper 71 having a rod 71b projecting from a lower end of a cylindrical damper body 71a, and a coil spring provided between the upper part of the damper body 71a and the lower part of the rod 71b so as to surround the hydraulic damper 71. The lower end of the rear cushion 23, that is, the lower end of the rod 71b is connected to the rear of the casing 21 of the power unit 20 via a shaft 73.
[0030]
A connection shaft 74 is coaxially fixed to the upper end of the rear cushion 23, that is, the upper end of the damper body 71a. The rear cushion mounting portion 70 is provided with a mounting hole 75 through which the connection shaft 74 is inserted. Thus, between the rear cushion mounting portion 70 and the washer 76 that penetrates the upper portion of the connection shaft 74, a rubber 79 whose radial outward expansion is restricted by the recessed rear cushion mounting portion 70 is interposed. Then, a bolt 77 that engages with the washer 76 is screwed to the upper end of the connection shaft 74. On the other hand, between the upper end of the damper body 71a and a guide member 78 formed in a cap shape having a cylindrical portion 78a fitted into the mounting hole 75, the guide member 78 bulges outward in the radial direction. Is regulated so that the rubber 80 is interposed. That is, the upper end of the rear cushion 23 is directly connected to the rear cushion mounting portion 70 via the rubbers 79 and 80.
[0031]
The sub-frame 32 has a pair of left and right vertical frame parts 83, 83 which are inclined upward and extend in the front-rear direction and formed of a light alloy such as an aluminum alloy or a synthetic resin reinforced with a long fiber reinforcing material. The attachment portions 85, 85 provided integrally with the front ends of the two vertical frame portions 83, 83 are fastened to the rear end of the main frame 31, that is, the rear end of the rear frame. The mounting portion 85 is integrally provided with a pair of front and rear mounting legs 86 and 87 protruding toward the rear end side of the rear frame 34. On the other hand, at the rear end of the rear frame 34, support projections 90, 91 corresponding to the mounting legs 86, 87 respectively are provided so as to project toward the sub-frame 32, and the mounting legs 86, 87 are provided. Are fastened to the support projections 90, 91, that is, the rear end of the rear frame 34, by fastening bolts 88, 89 with their tips abutting the corresponding support projections 90, 91.
[0032]
Moreover, at the rear of the rear frame 34, the support projections 90 and 91 disposed on the side where the rear cushion mounting portion 70 is provided, that is, on the left side, are disposed before and after the rear cushion mounting portion 70. The frame 32 is fastened to the rear frame 34, that is, the main frame 31, before and after the rear cushion mounting portion 70.
[0033]
The sub-frame 32 is arranged so as to surround both sides and the rear part of the fuel tank 92, and both sides of the front end of the fuel tank 92 are fastened and supported by the mounting parts 85, 85 of the sub-frame 32. On the other hand, tank support portions 84, 84 are integrally connected to the rear ends of the vertical frame portions 83, 83, and both sides of the rear end portion of the fuel tank 92 are fastened and supported by the tank support portions 84, 84. . Although not shown, a rear fender, a tail lamp, and the like are also attached to the subframe 32.
[0034]
Further, the sub-frame 32 integrally includes a rear grip 97 formed in a gate shape by connecting the rear ends of the two vertical frame portions 83, 83, and is integrally provided between both side intermediate portions of the rear grip 97. The rear end of the sheet 30 is supported by the supporting portion 98.
[0035]
12, both vertical frame portions 83, 83 of sub-frame 32 also function as side grips, and opening 99 for gripping those vertical frame portions 83, 83 has rear cover 29. Are provided on both sides of the.
[0036]
Next, the operation of this embodiment will be described. In the main frame 31 in which the front frame 33 integrally having the head pipe 16 at the front end and the rear frame 34 are integrally formed, on the left and right sides of the front frame 33, The stays 37 are integrally provided, and the floor panels 27 that support the feet of the occupant are supported on the stays 37. Therefore, it is unnecessary to provide a frame separate from the front frame 33, and the number of parts is reduced. In addition, auxiliary stays 43, 44, and 45 for attaching a battery 46, a horn 47, and a combination switch are integrally provided at a front portion of the front frame 33, so that a separate auxiliary is provided. The number of parts can be reduced by eliminating the need for a dexterity stay.
[0037]
The stays 37 extend relatively long in the front-rear direction and are integrated on the left and right sides of the front frame 33, so that a load acting on the stays 37 is not locally applied to the front frame 33, The load acting on the front frame 33 can be made substantially uniform over a relatively long distance in the front-rear direction. For this reason, even if the front frame 33 has an open cross-sectional shape, the load from the floor panels 27 can be sufficiently supported, and the integral formation of the stays 37 with the front frame 32 becomes easier.
[0038]
In addition, since the front frame 33 has an upwardly swelling portion 33a having a generally U-shaped cross section at the center in the left-right direction, the cross-sectional area of the front frame 33 is relatively large, and Can be improved in rigidity. Moreover, since the reinforcing members 41 are provided between the right and left stays 37 of the front frame 33, the rigidity of the front frame 33 can be further improved. Further, since the floor panels 27 are supported by the stays 37 with the upper portions of the bulging portions 33a exposed to the outside, the leg shields 26 and the floor panels 27 of the body cover 24 are relatively small. It can be formed.
[0039]
The rear frame 34 of the main frame 31 is provided with a storage recess 50 having a front side wall 51, left and right side walls 52, 52 and a rear side wall 53, which are raised upward, and which is open at the top. Since the article storage container 49 is attached to the rear frame 34 with a part of the article storage container 49, the rigidity of the rear frame 34 can be increased without increasing the thickness of the portion supporting the bottom of the article storage container 49, The upper end position of the article storage container 49, that is, the seat height can be kept low without increasing the weight.
[0040]
Also, the upper end of the rear cushion 23 is connected to the rear portion of the rear frame 34. The left side wall 52 of the storage recess 50 includes an inner plate 52a forming the inner side surface of the storage recess 50, and an outer side of the inner plate 52a. An outer plate 52b arranged at an interval and a connecting plate 52c connecting the upper ends of the inner plate 52a and the outer plate 52b are formed in a substantially U-shaped cross section that opens downward. Since the upper end of the rear cushion 23 is connected to the rear frame 34 at a position close to the left side wall 52, the mounting rigidity of the rear cushion 23 to the rear frame 34 can be increased. In addition, since the engine hanger brackets 58 are integrally provided on the rear frame 34, a separate bracket for the engine hanger is not required, and the number of parts can be reduced.
[0041]
The upper end of the rear cushion 23 is directly connected to a rear cushion mounting portion 70 provided on the rear frame 34 with rubbers 79 and 80 interposed between the upper and lower surfaces thereof. Since a separate bracket for mounting the 23 is not required, the number of parts can be reduced. Moreover, the rear cushion mounting portion 70 is provided at the rear portion of the rear frame 31 so as to be recessed downward, so that the rigidity of the rear cushion mounting portion 70 can be made relatively high, and the rear cushion mounting portion 70 in which the rubber 79 is recessed is provided. By being fitted to the portion 70, a guide member for regulating the expansion of the rubber 79 in the radial direction is not required, which can contribute to a reduction in the number of parts.
[0042]
A rearward upward load from the rear cushion 23 acts on the rear portion of the rear frame 34, but a part of the occupant load from the seat 30, the load on the fuel tank 92, and the vertical frame portion functioning as a side grip The subframe 32 that receives a load when the vehicle body is lifted by gripping the rear grip 83 or the rear grip 97 is fastened to the rear frame 34 before and after the rear cushion mounting portion 70. Therefore, a load having a phase opposite to the thrust load from the rear cushion 23 can be applied to the rear frame 34 before and after the rear cushion mounting portion 70, and a relatively large load in a certain direction acts on the rear portion of the rear frame 34. By preventing this, it is not necessary to increase the thickness of the rear frame 34 or to dispose the reinforcing ribs, and it is possible to reduce the weight.
[0043]
Further, the fuel tank 92, the rear fender, the tail lamp, and the like are attached to the subframe 32. The subframe 32 to which the fuel tank 92, the rear fender, the tail lamp, and the like are attached can be assembled to the rear frame 34. In assembling the scooter type vehicle, the fuel tank 92, the rear fender, the tail lamp, and the like can be assembled and prepared in advance on the sub-frame 32, and the assembling efficiency can be improved.
[0044]
In addition, since the sub-frame 32 integrally has the vertical frame portion 83... Functioning as a side grip and the rear grip 97, it is not necessary to assemble these grips separately, which contributes to a reduction in the number of parts. can do.
[0045]
As described above, the embodiments of the present invention have been described in detail. However, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible.
[0046]
【The invention's effect】
As described above, according to the first aspect of the invention, the rear frame is provided with the storage recess having the side wall rising upward and having an open upper portion, and at least a part of the storage recess is stored in the storage recess. Since the article storage container is attached to the rear frame, the rigidity of the rear frame is increased without increasing the thickness of the portion supporting the bottom of the article storage container, and the upper end position of the article storage container, that is, the seat height without increasing the weight. Can be kept low.
[0047]
According to the invention described in claim 2, the left and right walls of the storage recess are provided with an inner plate forming an inner side surface of the storage recess, and an outer plate arranged at intervals on the outer side of the inner plate. A connecting plate for connecting between upper ends of the inner plate and the outer plate, and having a substantially U-shaped cross-sectional shape opened downward, and a rear cushion at a position close to one of the left and right walls. Since the upper end is connected to the rear frame, the rear cushion can be attached to the rear frame in the vicinity of a highly rigid cross-sectional shape, so that the mounting rigidity of the rear cushion to the rear frame can be increased.
[0048]
According to the third aspect of the present invention, since the engine hanger bracket is integrally provided on the rear frame, a separate bracket for the engine hanger is not required, and the number of parts can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view of a scooter type vehicle.
FIG. 2 is a plan view of the scooter type vehicle.
FIG. 3 is a side view of the vehicle body frame.
FIG. 4 is a plan view of the vehicle body frame.
FIG. 5 is an enlarged sectional view taken along line 5-5 of FIG. 1;
FIG. 6 is an enlarged vertical sectional side view of a portion indicated by an arrow 6 in FIG.
FIG. 7 is a sectional view taken along line 7-7 of FIG. 6;
FIG. 8 is a sectional view taken along line 8-8 in FIG. 6;
FIG. 9 is an enlarged longitudinal side view showing a connection portion of the rear cushion to the vehicle body frame.
FIG. 10 is an enlarged vertical sectional side view of a portion indicated by an arrow 10 in FIG.
FIG. 11 is a plan view as viewed from the direction of the arrow 11 in FIG. 10;
FIG. 12 is an enlarged sectional view taken along line 12-12 of FIG. 10;
[Explanation of symbols]
16 head pipe 18 front fork 23 rear cushion 33 front frame 34 rear frame 35 inclined portion 36 rearward extension 49 article storage container 50 storage recesses 51, 52, 53 side walls 52a inner plate 52b outer plate 52c connecting plate 58 engine hanger bracket

Claims (3)

A head pipe (16) for supporting the front fork (18) in a steerable manner, an inclined portion (35) extending rearward and downward from the head pipe (16), and a rear end of the inclined portion (35) which is substantially horizontal. A front frame (33) having a rear extension (36) extending rearward and a rear frame (34) extending rearward from the rear end of the front frame (33) are integrally formed, and the article storage container ( In the vehicle body structure of a scooter type vehicle, wherein 49) is attached to the rear frame (34), the rear frame (34) has side walls (51, 52, 53) rising upward and the upper part is opened. A recess (50) is provided, and the article storage container (49) is attached to the rear frame (34) with at least a part of the article storage container (50) being stored in the storage recess (50). Body structure of a scooter-type vehicle. The left and right walls (52) of the storage recess (50) are spaced apart from an inner plate (52a) forming the inner side surface of the storage recess (50) and an outer side of the inner plate (52a). An outer plate (52b), and a connecting plate (52c) connecting the upper ends of the inner plate (52a) and the outer plate (52b) to form a substantially U-shaped cross section that opens downward. The body structure of a scooter type vehicle according to claim 1, wherein an upper end of a rear cushion (23) is connected to a rear frame (34) at a position close to one of the left and right side walls (52). . The vehicle body structure of a scooter type vehicle according to claim 1, wherein an engine hanger bracket (58) is integrally provided on the rear frame (34).

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