JP2020164042A - Cushion unit support structure of saddle-riding type vehicle - Google Patents

Abstract

To provide a cushion unit support structure of a saddle-riding type vehicle which can secure attachment rigidity without increasing intensity and a size of fastening members, which fasten a stay supporting an upper end part of a cushion unit in a swingable manner to a power unit case, more than necessary.SOLUTION: A cushion unit support structure of a saddle-riding type vehicle includes a stay 50 which is disposed between a power unit case 41 and a cushion unit 61 and supports an upper end part 61a of the cushion unit 61 in a swingable manner. The power unit case 41 has a fixed part 43 provided at a wall part 41e. The stay 50 has contact surfaces 55, 56, 153 which contact with contacted surfaces 44, 45 of the fixed parts 43, 144, and is fixed to the fixed part 43 by fastening members 80, 81, 82 with the contacted surfaces 44, 45 and the contact surfaces 55, 56 contacting with each other. The cushion unit 61 is disposed inclining so that the upper end part 61a is oriented to the vehicle body front. A fastening direction of the fastening members 80, 81, 82 has a vector component in a vehicle body fore and aft direction. The structure secures attachment rigidity without increasing intensity and a size of the fastening members more than necessary.SELECTED DRAWING: Figure 5

Description

The present invention relates to a cushion unit support structure of a saddle-riding vehicle in which an upper end portion of a cushion unit is attached via a stay to a fixed portion provided in a power unit case.

As a cushion unit support structure of a conventional saddle-riding vehicle, a structure in which the upper end of the cushion unit is connected to the fixed portion of the power unit via a stay and the lower end of the cushion unit is connected to the rear suspension is disclosed. (See Patent Document 1).

In the cushion unit support structure described above, the fastening member for fixing the stay and the fixed portion is fastened in a direction orthogonal to the axial direction (extension direction) of the cushion unit. In such a fixing method, when a load is generated on the cushion unit, most of the force generated between the fixed portion and the stay is received by the fastening member, and the direction of the force is the diameter of the fastening member. It is a force related to the direction.

However, in such a fixing method, when a load is generated, most of the force generated between the fixed portion and the stay is received by the fastening member, and the direction of the force is the force applied in the radial direction of the fastening member. Therefore, in order to withstand this load, it is necessary to increase the strength and size of the fastening member.

Japanese Patent No. 46717778

The present invention has been made in view of such technical problems, and an object of the present invention is to make a fastening member for fastening a stay that swingably supports the upper end portion of a cushion unit to a power unit case higher than necessary. The purpose is to secure the mounting rigidity for attaching the stay to the power unit without increasing the strength and size.

The present invention solves the above problems, and includes a power unit case for a saddle-riding vehicle and a power unit case.
A swing arm whose front end is pivotally supported by a frame supporting the power unit case and whose rear end pivotally supports the rear wheels.
A cushion unit whose lower end is pivotally supported by the swing arm,
In the cushion unit support structure of a saddle-riding vehicle provided with a stay interposed between the power unit case and the cushion unit and swingably supporting the upper end portion of the cushion unit.
The power unit case has a fixed portion provided on the wall portion of the power unit case.
The stay has a contact surface that comes into contact with the contact surface of the fixed portion, and is fixed to the fixed portion by a fastening member so that the contact surface and the contact surface are in contact with each other.
The cushion unit is arranged so as to be inclined so that the upper end portion faces the front of the vehicle body.
The fastening direction of the fastening member is a cushion unit support structure for a saddle-riding vehicle, which has a vector component in the front-rear direction of the vehicle body.

According to the above configuration, when a load is generated on the cushion unit, the force generated between the fixed portion and the stay is divided into a force in the direction perpendicular to the contact surface and a force in the direction parallel to the contact surface. can do. These are a force acting in the axial direction of the fastening member and a force acting in the direction of shearing the fastening member. Therefore, since a part of the force received at the fastening portion is a force acting in the axial direction of the fastening member, it is stronger than the force related to the radial direction, and therefore the fastening member should be made stronger and larger than necessary. It is possible to secure the mounting rigidity without any problem.

In the configuration, the fixed portion has a plurality of contact surfaces.
The stay has a plurality of the contact surfaces corresponding to the plurality of contact surfaces.
The stay swingably supports the upper end portion of the cushion unit by a connecting member.
At least one of the plurality of contacted surfaces is an upper contacted surface whose at least a part thereof is located above the central axis of the connecting member, which is the central axis of the connecting member.
At least one of the plurality of contacted surfaces is a lower contacted surface whose at least a part thereof is located below the central axis of the connecting member.
The stay has an upper contact surface in contact with the upper contact surface and a lower contact surface in contact with the lower contact surface.
The orientation of the upper contact surface and the orientation of the lower contact surface may be such that the stay resists the force of swinging around the central axis of the connecting member.

According to the above configuration, the direction of the upper contact surface and the lower contact surface is formed so as to resist the swinging force around the connecting member of the stay, so that the load direction is changed by the swing of the cushion unit. Even if the cushion unit is changed, when the cushion unit is extended, the rotating force of the stay about the central axis of the connecting member is received as a pressing force on the upper contact surface, and when the cushion unit is shortened, the connecting member is shortened. The rotating force of the stay about the central axis can be received as a pressing force on the lower contact surface, and the load can be effectively received on the upper contact surface and the lower contact surface.

In the above configuration, a bolt and a nut screwed into the bolt are used as a fastening member for fixing the lower contact surface and the lower contact surface, and the lower contact surface of the fixed portion is provided. A bolt insertion hole for a fixed portion through which the bolt is inserted is provided at a location, and a stay bolt insertion hole through which the bolt is inserted is provided at a location where the lower contact surface of the stay is provided. May be good.

According to the above configuration, if only bolts are used as the fastening member, a predetermined wall thickness is required when forming a male screw for screwing the bolt which is the fastening member. However, by using bolts and nuts as fastening members, it is not necessary to increase the wall thickness to a predetermined thickness, which contributes to weight reduction.

In the above configuration, the wall portion of the power unit case may be provided with a vertical rib protruding from the wall portion from below the portion where the fastening member is fastened in the fixed portion.

According to the above configuration, the rigidity can be effectively improved by providing the vertical rib below the portion where the fastening member to which a load is easily applied is fastened.

In the above configuration, the power unit case is a vertically split case including an upper case and a lower case, the fixed portion is provided on the upper case, and the lower end of the vertical rib is connected to the wall portion of the power unit case. , Horizontal ribs that protrude from the wall and extend to the left and right may be provided.

According to the above configuration, the deformation of the upper case transmitted through the vertical ribs due to the load is cut off by the horizontal ribs, and it is possible to suppress the deformation of the upper case from reaching the split surface of the power unit case.

The power unit case is a vertically split case having an upper case and a lower case fixed by stud bolts, the fixed portion is provided on the upper case, and the fastening on the wall portion of the upper case is performed. A vertical rib protruding from the wall portion (141a) is provided from below the portion where the member is fastened, and the wall portion of the upper case and the wall portion of the lower case are bosses through which the stud bolts are inserted. It may have a portion and the vertical rib may be provided so that the lower end thereof is continuous with the boss portion.

According to the above configuration, the opening strength of the case opening of the power unit case is improved.

In the above configuration, at least one of the mating surface of the upper case with the lower case and the mating surface of the lower case with the upper case is located between the plurality of boss portions. It is also possible to provide a groove for collecting the liquid gasket.

Since the mating surface of the power unit case is provided with a groove for collecting the liquid gasket, the liquid gasket improves the sealing property of the mating surface of the power unit case.

In the above configuration, the fixed portion may be provided on a hanger portion for fixing the power unit case to the frame.

According to the above configuration, by forming the fixed portion on the hanger portion that generally requires strength, it is possible to suppress an increase in meat for ensuring the rigidity of the fixed portion.

In the configuration, the fixed portion is provided on a hanger portion for fixing the power unit case to the frame, the hanger portion is attached to the frame by a mounting bolt, and the hanger portion is inserted with the mounting bolt. It has a mounting bolt insertion hole, at least a part of the upper contact surface is located above the mounting bolt insertion hole, and at least a part of the lower contact surface is below the mounting bolt insertion hole. It may be located at.

According to the above configuration, since the plurality of contacted surfaces are arranged so as to be sandwiched above and below the mounting bolt insertion holes that require high rigidity, it is possible to further suppress the increase in meat for ensuring rigidity. ..

The present invention secures the mounting rigidity for attaching the stay to the power unit without making the fastening member for fastening the stay that swingably supports the upper end of the cushion unit to the power unit case to be unnecessarily high in strength and size. be able to.

It is a left side view of the whole motorcycle to which the cushion unit support structure for a saddle-riding vehicle which concerns on one Embodiment of this invention is applied. It is a left side view of a power unit and a link shock absorber. It is a perspective view around the fixed part of a power unit case. It is a perspective view of the state which the stay is fixed to the fixed part of the power unit case of FIG. It is a perspective view of the state which connected the upper end part of the cushion unit to the stay of FIG. It is a perspective view which looked at the stay from the diagonally left front upper side. It is a perspective view which looked at the stay diagonally from the left rear bottom. It is a left side view of the stay. It is the top view of the power unit case main part in the state where the stay is attached to the fixed part of the power unit case, and the cushion unit is attached to the stay. It is sectional drawing which cut at XX of FIG. It is an enlarged view of the main part of FIG. 10 which disassembled and showed the fastening direction of a bolt. 9 is a cross-sectional view taken along the line XI-XI of FIG. It is an enlarged view of the main part of FIG. 12 which disassembled and showed the fastening direction of a bolt. FIG. 5 is an enlarged perspective view of a main part of a power unit of a motorcycle to which the cushion unit support structure for a saddle-riding vehicle of the second embodiment is applied. It is a cut perspective view which cut the power unit of FIG. 14 in the vertical direction along the first boss part from the left. It is a cut perspective view which cut the power unit of FIG. 14 in the vertical direction along the second boss part from the left. FIG. 6 is a perspective view of a main part of the power unit of FIG. 14 with the upper case removed. It is a perspective view of the power unit in the state which the stay is attached to the fixed part of the power unit of FIG. It is a perspective view of the power unit in the state which attached the cushion unit to the stay of FIG. It is a perspective view of the stay seen from the diagonally left front. It is a rear view of a stay. It is a front view of a stay. It is a left side view of the stay.

Hereinafter, the cushion unit support structure 40 of the first embodiment according to the present invention will be described with reference to FIGS. 1 to 12. FIG. 1 is a side view of a motorcycle 1 to which the cushion unit support structure 40 of the saddle-riding vehicle according to the first embodiment of the present invention is applied. The motorcycle 1 includes a power unit P in which an engine E and a transmission T are integrated.

The frame F includes a frame F composed of a front frame member 2 on which the power unit P is mounted and a rear frame member 3 coupled to the rear portion of the front frame member 2. The front frame member 2 is composed of a head pipe 4, a main frame member 31, a down frame member 32, a center frame member 33, a connecting frame member 34, a bracket 35, and a plurality of cross members (not shown). It is configured.

The main frame member 31 extends rearwardly to the left and right from the head pipe 4. The down frame member 32 extends from the front portion of the head pipe 4 and the main frame member 31 to the left and right and rearward and downward. The center frame member 33 extends rearward from the rear ends of the left and right main frame members 31, and then bends downward and extends. The connecting frame member 34 is interposed between the rear end of the down frame member 32 and the lower front end of the center frame member 33. The bracket 35 is integrally provided on the upper portion of the center frame member 33 for connecting the rear frame member 3. These members are cast products and the connections are welded.

A front fork 5 that pivotally supports the front wheel WF is operably supported by the head pipe 4 provided at the front end of the front frame member 2, and a handle 6 is connected to the upper portion of the front fork 5. The power unit P is supported by the front frame member 2.

A front end portion of a swing arm 7 that pivotally supports the rear wheel WR is pivotally supported at the rear portion of the front frame member 2 via a pivot shaft 8. The rear wheel WR is rotatably supported at the rear end of the swing arm 7 via the rear axle 9. A link type shock absorber 60 is provided between the swing arm 7, the front frame member 2, and the power unit P.

The power output from the output shaft 12 of the transmission T incorporated in the rear portion of the power unit P is transmitted to the rear wheel WR via the chain transmission means 13. The chain transmission means 13 is composed of a drive sprocket 14 fixed to the output shaft 12, a driven sprocket 15 fixed to the rear wheel WR, and an endless chain 16 wound around both of these sprockets, and the traveling direction of the motorcycle 1. It is arranged on the left side of the power unit P while facing forward.

A fuel tank 17 supported by the front frame member 2 and the front portion of the rear frame member 3 is arranged above the power unit P, and an air cleaner 18 is arranged between the fuel tank 17 and the power unit P to form a power unit. A radiator 19 is arranged in front of P.

The exhaust pipe 21 connected to the cylinder head 20 of the engine E extends from the front side of the engine E below the power unit P, extends upward on the outside of the right arm of the swing arm 7, and is attached to the rear frame member 3 above the rear wheel WR. It is connected to a supported exhaust muffler 22. The rear frame member 3 is provided with a driver's seat 23 and a passenger's seat 24. The body is covered with cowl 25.

FIG. 2 is a side view showing the power unit P, the link type shock absorber 60, and the cushion unit support structure 40.

The power unit P includes a power unit case 41 in which an engine E and a transmission T are integrally incorporated. The power unit case 41 is a case divided into upper and lower halves, and includes an upper case 41a and a lower case 41b. The power unit case 41 is attached to the frame F as follows.

The front part of the power unit case 41 is formed by inserting the mounting bolts 26 into the mounting bolt insertion holes 41c provided in the power unit case 41 and the power unit mounting holes 32a provided at the lower end of the down frame member 32. Can be attached to 32.

The rear lower part of the power unit case 41 is attached to the center frame member 33 by inserting the mounting bolts 27 into the mounting bolt insertion holes 41d provided in the power unit case 41 and the power unit mounting holes 33b at the lower end of the center frame member 33. Has been done.

As shown in FIG. 3, a hanger portion 42 extending diagonally upward and rearward from the rear wall portion 41e is provided integrally with the power unit case 41 at the rear upper portion of the power unit case 41. The left and right sides of the hanger portion 42 are formed in a stretched portion 42a extending in a triangular shape, and the top of the stretched portion 42a is a boss portion 42b. The boss portion 42b is formed with a mounting bolt insertion hole 42c into which a mounting bolt 28 connecting the power unit case 41 and the frame F is inserted.

As shown in FIG. 2, the mounting bolt 28 is inserted into the mounting bolt insertion hole 42c and the power unit mounting hole 33a at the bent portion of the center frame member 33, and both ends of the mounting bolt 28 are fastened by nuts 29. It is attached to the center frame member 33.

As shown in FIG. 1, the rear wheel suspension device 30 includes a swing arm 7 and a link type shock absorber 60. The front end portion 7a of the swing arm 7 is pivotally supported substantially in the center of the vertical portion of the center frame member 33 so as to be swingable in the vertical direction via the pivot shaft 8. As shown in FIG. 2, the link type shock absorber 60 includes a cushion unit 61 and a link mechanism 62. The cushion unit 61 is arranged so that the upper end portion 61a faces the front of the vehicle body of the motorcycle 1 and the lower end portion 61b faces the rear of the vehicle body and is inclined diagonally forward and upward.

As shown in FIG. 1, the rear wheel WR is rotatably supported by the rear end portion 7b of the swing arm 7 via the rear axle 9, and the rear wheel WR is driven by the endless chain 16. The driven sprocket 15 is fixed so that it can rotate integrally.

As shown in FIG. 2, the link mechanism 62 includes a triangular link member 63 and a rod-shaped link member 64.
The triangular link member 63 is formed in a triangle having three tops, a first top 63a, a second top 63b, and a third top 63c. The first top portion 63a is connected to the lower end of the vertical portion of the center frame member 33 via the support shaft 65. The second top portion 63b is connected to one end 64a of the rod-shaped link member 64 via a support shaft 66. The third top portion 63c is connected to the lower end portion 61b of the cushion unit 61 via a support shaft 67. With reference to FIG. 1, the other end 64b of the rod-shaped link member 64 is pivotally supported by a mounting portion 70 projecting from the lower part of the swing arm 7 via a support shaft 68.

As shown in FIG. 2, the upper end portion 61a of the cushion unit 61 is pivotally supported by the cushion unit support structure 40. The cushion unit support structure 40 includes a fixed portion 43 extending from the rear upper portion of the power unit case 41 and a stay 50 attached to the fixed portion 43. The upper end portion 61a of the cushion unit 61 is swingably supported by the stay 50 by the connecting member 58.

As shown in FIG. 3, the hanger portion 42 has a fixed portion 43 located between the left and right extension portions 42a and extending diagonally upward and backward from the rear wall portion 41e of the power unit case 41. It is integrally formed with the power unit case 41. As shown in FIG. 5, a stay 50 that swingably supports the upper end portion 61a of the cushion unit 61 is attached to the fixed portion 43.

As shown in FIG. 3, the fixed portion 43 is formed so as to protrude from the rear wall portion 41e of the power unit case 41 and connect to the extending portion 42a of the hanger portion 42. The fixed portion 43 is formed with a plurality of contacted surfaces to which the stay 50 is in contact. In the present embodiment, the fixed portion 43 is provided with two contact surfaces, an upper contact surface 44 and a lower contact surface 45. With reference to FIG. 6, the stay 50 has an upper contact surface 55 that contacts the upper contact surface 44 of the fixed portion 43 so as to correspond to the upper contact surface 44 and the lower contact surface 45. A lower contact surface 56 that contacts the lower contact surface 45 is provided.

As shown in FIGS. 3 and 10, the upper contact surface 44 of the fixed portion 43 of the power unit case 41 has a part of the upper contact surface 44 in which the upper end portion 61a of the cushion unit 61 stays. It is located above the central axis of the connecting member 58 connected to 50 (hereinafter referred to as the connecting member central axis 58L). As shown in FIG. 12, the lower contact surface 45 is located below the connecting member central axis 58L in the side view.

As shown in FIG. 3, the fixed portion 43 includes a pair of side portions 43a formed to a thickness protruding from the rear wall portion 41e of the power unit case 41 and provided on both the left and right sides, and a pair of side portions 43a. It is provided with a connecting portion 43b formed long in the lateral direction so as to be connected. The upper contact surface 44 is formed by the side portion 43a of the fixed portion 43 and the rear surface of the connecting portion 43b. Bolt holes 43d into which bolts 80 (see FIGS. 4 and 12) for fixing the stay 50 are screwed are formed in each of the left and right side portions 43a.

As shown in FIGS. 2 and 10, the upper contact surface 44 is formed at the rear end of the power unit case 41 in a direction that is substantially vertical and slightly tilted forward in a side view. Bolt holes 43d provided on the left and right side portions 43a of the fixed portion 43 are provided in a direction perpendicular to the upper contact surface 44.

As shown in FIG. 3, the rear wall portion 41e of the power unit case 41 is provided with a first vertical rib 46 extending downward from each of the pair of bolt holes 43d of the fixed portion 43. The upper end portion 46a of the first vertical rib 46 extends from substantially the same surface as the upper contact surface 44, and the amount of protrusion from the rear wall portion 41e decreases as it goes downward, and the lower end portion 46b of the first vertical rib 46 Is continuously formed so as to be substantially flush with the rear wall portion 41e. A horizontal rib 48 is provided so as to connect the lower end 46b of the first vertical rib 46 on the left to the first vertical rib 46 on the right.

The rear wall portion 41e of the power unit case 41 is provided with a second vertical rib 47 facing downward, located inside the first vertical rib 46. The lower end 47b of the second vertical rib 47 does not extend to the horizontal rib 48, and the second vertical rib 47 is shorter in length than the first vertical rib 46.

The portion below the connecting portion 43b of the fixed portion 43 and between the pair of first vertical ribs 46 is the central wall portion 43c. As shown in FIG. 12, the central wall portion 43c extends diagonally backward and upward from the rear wall portion 41e of the power unit case 41, and is a wall having a predetermined thickness so as to connect the rear wall portion 41e and the connecting portion 43b. It is formed in the part.

As shown in FIGS. 3 and 12, the central wall portion 43c is a lower contact surface 45 to which the lower contact surface 56 of the stay 50 is in contact. As shown in FIG. 12, the lower contact surface 45 is formed so as to incline downward from the vertical direction toward the rear.

A bolt insertion hole 43e through which the bolt 81 is inserted is provided in the center of the central wall portion 43c. The bolt insertion hole 43e is provided in a direction perpendicular to the lower contact surface 45.

As shown in FIGS. 6 to 8, the stay 50 fixed to the fixed portion 43 is configured as follows. The stay 50 includes a first base 51, a second base 52, an extension portion 53 connecting the first base 51 and the second base 52, and a pair of left and right cushion unit support portions extending rearward from the first base 51. 54, which was integrally formed by casting.

As shown in FIG. 7, the first base portion 51 is long in the width direction and is formed in a substantially triangular shape on both the left and right sides. As shown in FIG. 6, the front surface of the first base portion 51 is an upper contact surface 55 that comes into contact with the upper contact surface 44 of the fixed portion 43. Bolt insertion holes 51a through which the bolt 80 as a fastening member is inserted are formed on both the left and right sides.

The second base portion 52 has a boss shape and is provided diagonally forward and downward of the first base portion 51. The diagonally front surface of the second base portion 52 is a lower contact surface 56 that is brought into contact with and fixed to the lower contact surface 45 of the fixed portion 43. A bolt insertion hole 52a through which a bolt 81 as a fastening member is inserted is formed in the center of the second base portion 52.

The first base 51 and the second base 52 are connected by an extension 53. The stretched portion 53 extends diagonally forward and downward from the first base portion 51 and becomes narrower toward the tip, and connects the first base portion 51 and the second base portion 52.

As shown in FIG. 7, a pair of cushion unit support portions 54 are provided in parallel from the rear surface of the first base portion 51 toward the rear. The cushion unit support portion 54 is formed with a connecting member insertion hole 54a through which a connecting member 58 to be connected to the upper end portion 61a of the cushion unit 61 is inserted. As shown in FIGS. 5 and 12. The connecting member 58 is inserted into the connecting member insertion hole 54a of the cushion unit support portion 54 and the connecting member insertion hole 61c provided in the upper end portion 61a of the cushion unit 61, and as shown in FIG. 9, the connecting member A nut 59 is screwed onto the right end of 58, and the cushion unit 61 is pivotally supported by the stay 50.

Since the fixed portion 43 and the stay 50 of the power unit case 41 are configured as described above, the stay 50 is attached to the fixed portion 43 as follows with reference to FIGS. 4, 10 and 12. ..

The stay 50 contacts the fixed portion 43 so that the upper contact surface 55 and the lower contact surface 56 of the stay 50 are in contact with the upper contact surface 44 and the lower contact surface 45 of the fixed portion 43 of the power unit case 41, respectively. Will be done.

As shown in FIGS. 3, 4, 6 and 10, the bolt 80 was inserted into the left and right bolt insertion holes 51a of the stay 50, and the bolt 80 was provided on the side portion 43a of the fixed portion 43. Screw into the bolt hole 43d. Since the bolt hole 43d is provided in the direction perpendicular to the upper contact surface 44, the bolt 80 is fastened in the direction perpendicular to the upper contact surface 44. As shown in FIG. 10, in the side view of the vehicle, the upper contact surface 44 is formed so as to be slightly tilted forward from the vertical. Since the fastening direction D of the bolt 80 is a direction slightly tilted forward from the horizontal, as shown in FIG. 11, the fastening direction D1 of the bolt 80 is the vector component D1x in the front-rear direction of the vehicle body and the vehicle body. It can be divided into a vector component D1y in the vertical direction of. The fastening direction D1 of the bolt 80 has a vector component D1x in the front-rear direction of the vehicle body.

As shown in FIGS. 3, 4, 6 and 12, a bolt insertion hole 52a provided in the second base portion 52 of the stay 50 and a bolt insertion hole provided in the central wall portion 43c of the fixed portion 43. Insert the bolt 81 through 43e, screw the nut 82 into the end of the bolt 81 that penetrates to the upper surface of the central wall portion 43c of the fixed portion 43, and fix the stay 50 to the fixed portion 43. To do. Since the bolt insertion hole 43e is provided in the direction perpendicular to the lower contact surface 45, the bolt 81 is fastened by the nut 82 in the direction perpendicular to the lower contact surface 45. As shown in FIG. 12, in the side view of the vehicle, the lower contact surface 45 is formed so as to face upward as it faces rearward. Therefore, as shown in FIG. 13, the bolt 81 and the nut 82 are formed. The fastening direction D2 can be divided into a vector component D2x in the front-rear direction of the vehicle body and a vector component D2y in the vertical direction of the vehicle body. The fastening direction D2 of the bolt 81 and the nut 82 has a vector component D2x in the front-rear direction of the vehicle body.

The cushion unit 61 is swingably supported by the stay 50 as shown below. As shown in FIG. 5, the upper end portion 61a of the cushion unit 61 is inserted between the pair of cushion unit support portions 54 of the stay 50. The connecting member 58 is inserted into the connecting member insertion hole 61c provided in the upper end portion 61a of the cushion unit 61 and the connecting member insertion hole 54a of the cushion unit support portion 54 of the stay 50, and the upper end portion 61a of the cushion unit 61 is a stay. Supportable to swing to 50.

Since the cushion unit support structure 40 of the first embodiment is configured as described above, it has the following effects.

The cushion unit support structure 40 of the first embodiment has a power unit case 41 and a swing arm 7 whose front end is pivotally supported by a frame F supporting the power unit case 41 and whose rear end pivotally supports the rear wheel WR. A stay 50 is provided between the cushion unit 61 to which the lower end portion 61b is pivotally supported and the power unit case 41 and the cushion unit 61 to swingably support the upper end portion 61a of the cushion unit 61.
Further, the power unit case 41 has a fixed portion 43 extending from the power unit case 41, and the stay 50 has an upper contact surface 55 and a lower contact surface 56 that come into contact with the fixed portion 43, and the fixed portion 43. The stay 50 is a bolt that is a fastening member in a state where the upper contact surface 44 and the lower contact surface 45 of the fixed portion 43 and the upper contact surface 55 and the lower contact surface 56 of the stay 50 are in contact with each other. It is fastened by 80, bolt 81 and nut 82.
Further, the cushion unit 61 is arranged so that the upper end portion 61a is inclined toward the front of the vehicle body, and the fastening directions D1 and D2 of the bolts 80, bolts 81 and nuts 82, which are fastening members, are vector components in the vehicle body front-rear direction, respectively. It has D1x and D2x.

Since the cushion unit support structure 40 is configured in this way, when a load is generated on the cushion unit 61, the force generated between the fixed portion 43 and the stay 50 is in the direction perpendicular to the upper contact surface 44. It can be divided into forces and forces in the parallel direction. These are a force acting in the axial direction of the bolt 80, which is a fastening member, and a force acting in the direction of shearing the bolt 80. Similarly, the lower contact surface 45 can also be divided into a force in the direction perpendicular to the lower contact surface 45 and a force in the parallel direction. These are the force acting in the axial direction of the bolt 81 and the force acting in the direction of shearing the bolt 81. Therefore, since part of the force received by the bolts 80 and 81, which are the fastening members, is the force acting in the axial direction of the bolts 80 and 81, it is stronger than the force related to the radial direction, and therefore the bolt 80 as the fastening member. ， 81 can be secured with mounting rigidity without making it stronger or larger than necessary.

Further, in the cushion unit support structure 40, the fixed portion 43 has a plurality of contact surfaces of the upper contact surface 44 and the lower contact surface 45. The stay 50 has a plurality of contact surfaces of the upper contact surface 55 and the lower contact surface 56 corresponding to the upper contact surface 44 and the lower contact surface 45.
The upper end portion 61a of the cushion unit 61 and the stay 50 are connected by a connecting member 58. At least one of the plurality of contacted surfaces is an upper contacted surface 44 located above the connecting member central axis 58L. Further, at least one of the plurality of contacted surfaces is a lower contacted surface 45 arranged below the connecting member central axis 58L.

As shown in FIG. 10, when a force for pushing up the stay 50 is generated from the cushion unit 61, the force acts on the stay 50 in the direction of counterclockwise rotation about the connecting member central axis 58L in the left side view. .. Then, the upper contact surface 44 of the fixed portion 43 receives the force from the upper contact surface 55 of the stay 50 and prevents the stay 50 from rotating counterclockwise.

Further, as shown in FIG. 12, when a force for pushing down the stay 50 is generated from the cushion unit 61, the force is applied to the stay 50 in the direction of clockwise rotation about the connecting member central axis 58L in the left side view. work. Then, the lower contact surface 45 of the fixed portion 43 receives the force from the lower contact surface 56 of the stay 50 and prevents the stay 50 from rotating counterclockwise.

As described above, the upper contact surface 44 and the lower contact surface 45 are formed so as to receive a swinging force about the connecting member 58 of the stay 50.

Since the cushion unit support structure 40 is configured as described above, even if the load direction changes due to the swing of the cushion unit 61, the rotating force of the stay 50 around the connecting member central shaft 58L is applied to the upper cover. It can be received as a pressing force on the contact surface 44 and the lower contact surface 45.

A nut 82 screwed into a bolt 81 and a bolt 81 is used as a fastening member for fixing the lower contact surface 45 of the fixed portion 43 and the lower contact surface 56 of the stay 50, and the lower cover of the fixed portion 43. The central wall portion 43c provided with the contact surface 45 is provided with a bolt insertion hole 44e through which the bolt 81 is inserted, and the bolt 81 is inserted into the second base portion 52 provided with the lower contact surface 56 of the stay 50. A bolt insertion hole 52a is provided.

Since it is configured in this way, if only bolts are used as the fastening member, it becomes necessary to form a male screw for screwing the bolt to the central wall portion 43c of the fixed portion 43, which is predetermined to the central wall portion 43c. However, by using bolts 81 and nuts 82 as fastening members, the central wall portion 43c can be made thinner than when only bolts are used, which contributes to weight reduction.

Since the rear wall portion 41e of the power unit case 41 is provided with a vertical rib 47 protruding from the rear wall portion 41e from below the side portion 43a to which the bolt 80 is fastened in the fixed portion 43, a load is easily applied. By providing the vertical rib 47 below the side portion 43a provided with the bolt hole 43d into which the bolt 80 is screwed, the rigidity can be effectively improved.

Further, the power unit case 41 is a vertically split case including an upper case 41a and a lower case 41b, and a fixed portion 43 is provided in the upper case 41a. Further, the rear wall portion 41e of the power unit case 41 is provided with horizontal ribs 48 that protrude from the rear wall portion 41e and extend to the left and right so that the lower portion 46c of the vertical ribs 46 is connected. With such a configuration, it is possible to prevent the deformation of the upper case 41a transmitted through the vertical ribs 46 due to the load from being cut off by the horizontal ribs 48 and to reach the split surface of the power unit case 41.

As shown in FIG. 3, the fixed portion 43 is provided on the hanger portion 42 that fixes the power unit case 41 to the frame F. The hanger portion 42 is attached to the frame F by a mounting bolt 28. The hanger portion 42 has a mounting bolt insertion hole 42c into which the mounting bolt 28 is inserted.

As shown in FIG. 10, at least a part of the upper contact surface 44 is located above the mounting bolt insertion hole 42c. As shown in FIG. 12, at least a part of the lower contact surface 45 is located below the mounting bolt insertion hole 42c.

In this way, the upper contact surface 44 and the lower contact surface 45 are arranged so as to sandwich the upper and lower sides of the mounting bolt insertion hole 42c, which requires high rigidity, and thus the rigidity around the mounting bolt insertion hole 42c. It is possible to further suppress the increase in meat for securing.

Next, the cushion unit support structure 100 of the second embodiment according to the present invention will be described with reference to FIGS. 14 to 23. The same as the cushion unit support structure 40 of the first embodiment will be described with reference to the same reference numerals.

FIG. 14 shows the cushion unit support structure 100 of the second embodiment. The power unit case 140 to which the cushion unit support structure 100 is applied is a vertically split case including an upper case 141 and a lower case 142. As shown in FIGS. 16 and 18, the upper case 141 and the lower case 142 are integrally fixed by stud bolts 149.

As shown in FIG. 15, on the rear wall portion 141a of the upper case 141, a hanger portion 143 extends obliquely upward and rearward from the upper portion and is provided integrally with the upper case 141. The left and right sides of the hanger portion 143 are formed in a stretched portion 143a extending in a triangular shape, and the top of the stretched portion 143a is a boss portion 143b. The boss portion 143b is formed with an insertion hole 143c through which a connecting member 58 connecting the power unit case 41 and the frame F is inserted.

The hanger portion 143 of the upper case 141 is provided with a fixed portion 144 located between the left and right extending portions 143a and to which the stay 150 described later is fixed. The fixed portion 144 is formed so as to protrude from the rear wall portion 141a of the upper case 141 and connect to the hanger portion 143. The fixed portion 144 is formed with a contact surface 145 to which the stay 150 is in contact.

The fixed portion 144 is formed in a substantially triangular shape in which the left and right side portions 144a and the lower portion 144b are tops. The left and right side portions 144a and the lower portion 144b, which are the top portions, are provided with bolt holes 144c into which bolts 180 for fixing the stay 150 are screwed. The bolt hole 144c is formed so as to be substantially perpendicular to the contact surface 145. The left and right side portions 144a are provided with fitting recesses 144d for positioning when the stay 150 is fixed. The center of the fixed portion 144 is a lightening recess 144e for lightening.

The rear wall portion 141a of the upper case 141 is formed with vertical ribs 147 extending downward from each of the bolt holes 144c of the fixed portion 144. As shown in FIGS. 16 and 18, the rear wall portion 141a of the upper case 141 and the rear wall portion 142a of the lower case 142 are provided with boss portions 141b and 142b through which the stud bolts 149 are inserted. The vertical rib 147 is provided so that its lower end 147b is continuous with the boss portion 141b.

As shown in FIG. 18, the mating surface 142d with the upper case 141 formed in the lower case 142 is provided with a groove portion 142e in which the liquid gasket is collected, which is located between the plurality of boss portions 142b. There is. In the present embodiment, the groove is provided on the mating surface 142d of the lower case 142, but it may be provided on the mating surface 141d of the upper case 141. Further, it may be provided on both the mating surface 141d of the upper case 141 and the mating surface 142d of the lower case 142.

The stay 150 fixed to the fixed portion 144 is configured as follows. As shown in FIGS. 20 to 23, the base portion 151 is formed in a substantially triangular shape, and a pair of cushion unit support portions 152 are formed at right angles to the base portion 151.

Both the left and right side portions 151a and the lower portion 151b, which are the tops of the triangularly formed base 151, are provided with bolt insertion holes 151c through which the bolt 180 is inserted. A pair of fitting convex portions 151d are formed on the left and right side portions 151a so as to be located inside the bolt insertion holes 151c.

When the stay 150 is attached to the fixed portion 144, the fitting convex portion 151d of the stay 150 is fitted into the fitting concave portion 144d of the fixed portion 144 for positioning, and the contact surface 153 of the stay 150 is positioned at the fixed portion 144. Abuts on the contacted surface 145 of. The bolt 180 is inserted into the bolt insertion hole 151c and screwed into the bolt hole 144c to fix the stay 150 to the fixed portion 144 as shown in FIG.

As shown in FIG. 14, the upper portion of the cushion unit 161 is inserted between the cushion unit support portions 152 of the stay 150, and the connecting member 58 is inserted into the connecting member insertion hole 152a of the cushion unit support portion 152 and the upper portion of the cushion unit 161. It is inserted into the communication member insertion hole 161c of 161a. The upper part of the cushion unit 161 is swingably supported by the stay 150.

Since the second embodiment is configured as described above, the following effects are obtained.

The rear wall portion 141a of the upper case 141 is provided with a vertical rib 147 that projects downward from the portion where the bolt 180 is fastened in the fixed portion 144 and protrudes from the rear wall portion 141a. The rear wall portion 141a of the upper case 141 and the wall portion 142a of the lower case 142 include boss portions 141b and 142b through which the stud bolts 149 are inserted. Since the lower end 147b of the vertical rib 147 is provided so as to be continuous with the boss portion 141b, the opening strength of the case opening of the power unit case is improved.

Since the mating surface 142d of the lower case 142 with the upper case 141 is provided with a groove 142e in which the liquid gasket is collected, which is located between the boss portions 142b, the mating surface of the power unit case 140, 141d, is provided by the liquid gasket. , 142d sealability is improved.

Although the embodiments of the present invention have been described above, the embodiments of the present invention are not limited to the above embodiments, and it goes without saying that the embodiments are included in various aspects within the scope of the gist of the present invention.

1 ... Motorcycle, 7 ... Swing arm, 7a ... Front end, 7b ... Rear end, 40 ... Cushion unit support structure, 41 ... Power unit case, 41a ... Upper case, 41b ... Lower case, 42 ... Hanger part, 41e ... rear wall part, 43 ... fixed part, 43c ... center wall part, 43e ... bolt insertion hole, 44 ... upper contact surface, 45 ... lower contact surface, 46 ... first vertical rib, 46c ... lower part, 48 … Horizontal ribs,
50 ... stay, 52 ... second base, 52a ... bolt insertion hole, 55 ... upper contact surface, 56 ... lower contact surface, 58 ... connecting member, 58L ... connecting member central shaft,
61 ... Cushion unit, 61a ... Upper end, 61b ... Lower end,
80 ... bolts, 81 ... bolts, 82 ... nuts,
100 ... Cushion unit support structure, 140 ... Power unit case, 141 ... Upper case, 141a ... Rear wall part, 141b ... Boss part, 141d ... Mating surface, 142 ... Lower case, 142b ... Boss part, 142d ... Mating surface, 142e ... Groove, 143 ... Hanger, 144 ... Fixed, 145 ... Contacted surface, 147 ... Vertical rib, 147b ... Lower end, 150 ... Stay, 153 ... Contact surface, 180 ... Bolt,
F ... frame, WR ... rear wheel, D1x ... vector component in the vehicle body front-rear direction, D2x ... vector component in the vehicle body front-rear direction.

Claims (9)

Power unit case (41,140) for saddle-riding vehicle and
The front end (7a) is pivotally supported by the frame (F) supporting the power unit case (41,140), and the rear end (7b) is the swing arm (7) that pivotally supports the rear wheel (WR).
A cushion unit (61) whose lower end (61b) is pivotally supported by the swing arm (7),
A saddle provided between the power unit case (41,140) and the cushion unit (61), and a stay (50,150) that swingably supports the upper end portion (61a) of the cushion unit (61). In the cushion unit support structure of a riding vehicle,
The power unit case (41,140) has a fixed portion (43,144) provided on a wall portion (41e, 141a) of the power unit case (41,140).
The stay (50,150) has a contact surface (55,56,153) in contact with the contact surface (44,45,145) of the fixed portion (43,144), and the contact surface (44,45,145) and the contact surface. It is fixed to the fixed portion (43) by a fastening member (80,81,82,180) so that (55,56,153) is in contact with the fixed portion (43).
The cushion unit (61) is arranged so as to be inclined so that the upper end portion (61a) faces the front of the vehicle body.
A cushion unit support structure for a saddle-riding vehicle, characterized in that the fastening direction of the fastening member (80, 81, 82, 180) has a vector component (D1x, D2x) in the front-rear direction of the vehicle body. The fixed portion (43) has a plurality of contact surfaces (44, 45).
The stay (50) has a plurality of the contact surfaces (55,56) corresponding to the plurality of contact surfaces (44,45).
The stay (50) swingably supports the upper end portion (61a) of the cushion unit (61) by a connecting member (58).
At least one of the plurality of contacted surfaces (44, 45) is located above the connecting member central axis (58L), which is the central axis of the connecting member (58). It is the contact surface (44) and
At least one of the plurality of contacted surfaces (44,45) is a lower contacted surface (45) whose at least a part thereof is located below the central axis (58L) of the connecting member.
The stay (50) has an upper contact surface (55) in contact with the upper contact surface (44) and a lower contact surface (56) in contact with the lower contact surface (45).
The direction of the upper contact surface (44) and the direction of the lower contact surface (45) are such that the stay (50) resists the force of swinging around the connecting member central axis (58L). The cushion unit support structure for a saddle-riding vehicle according to claim 1. The fastening member (81,82) for fixing the lower contact surface (45) and the lower contact surface (56) is a nut (82) screwed into the bolt (81) and the bolt (81). Is used,
A bolt insertion hole (43e) for the fixed portion through which the bolt (81) is inserted is provided at a portion (43c) of the fixed portion (43) where the lower contact surface (45) is provided.
The stay (50) is provided with a stay bolt insertion hole (52a) into which the bolt (81) is inserted at a portion (52) where the lower contact surface (56) is provided. The cushion unit support structure for a saddle-riding vehicle according to claim 2. The wall portion (41e) of the power unit case (41) has a vertical rib (41e) protruding from the wall portion (41e) from below the portion where the fastening member (80) is fastened in the fixed portion (43). The cushion unit support structure for a saddle-riding vehicle according to any one of claims 1 to 3, wherein 46) is provided. The power unit case (41) is a vertically split case including an upper case (41a) and a lower case (41b).
The fixed portion (43) is provided in the upper case (41a).
A lower portion (46c) of the vertical rib (46) is connected to the wall portion (41e) of the power unit case (41), and a horizontal rib (48) protruding from the wall portion (41e) and extending to the left and right is provided. The cushion unit support structure for a saddle-riding vehicle according to claim 4, wherein the cushion unit is supported. The power unit case (140) is a vertically split case having an upper case (141) and a lower case (142) connected by stud bolts (149).
The fixed portion (144) is provided in the upper case (141).
The wall portion (141a) of the upper case (141) has a vertical rib (141a) protruding from the wall portion (141a) from below the portion where the fastening member (180) is fastened in the fixed portion (144). 147) is provided,
The wall portion (141a) of the upper case (141) and the wall portion (142a) of the lower case (142) have boss portions (141b, 142b) through which the stud bolt (149) is inserted. ,
The cushion unit support structure for a saddle-riding vehicle according to claim 1, wherein the vertical rib (147) is provided so that its lower end (147b) is continuous with the boss portion (141b). At least one of the mating surface (141d) of the upper case (141) with the lower case (142) and the mating surface (142d) of the lower case (142) with the upper case (141). The saddle-riding vehicle according to claim 6, wherein a groove (142e) for collecting a liquid gasket is provided on one side between the plurality of boss portions (141b, 142b). Cushion unit support structure. The fixed portion (43,144) according to any one of claims 1 to 7, wherein the fixed portion (43,144) is provided on a hanger portion (42,143) for fixing the power unit case (41,140) to the frame (F). Cushion unit support structure for saddle-riding vehicles. The fixed portion (43) is provided on a hanger portion (42) for fixing the power unit case (41) to the frame (F).
The hanger portion (42) is attached to the frame (F) by a mounting bolt (28).
The hanger portion (42) has a mounting bolt insertion hole (42c) through which the mounting bolt (28) is inserted.
At least a part of the upper contact surface (44) is located above the mounting bolt insertion hole (42c).
The cushion unit for a saddle-riding vehicle according to claim 2 or 3, wherein at least a part of the lower contact surface (45) is located below the mounting bolt insertion hole (42c). Support structure.

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