JP2018130973A - Saddle-riding type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a saddle-riding type vehicle capable of effectively receiving a force that a front wheel incurs from a road surface, and inhibiting a sag of a front fork.SOLUTION: In a saddle-riding type vehicle of the present invention, each of vehicle body-side tubes 8 has a first joint 12 in a region located on the side of a front wheel 5 beyond a bracket 9. A vehicle body 2 includes a relay member 13 whose middle part is rotatably borne by the vehicle body 2 and which has second joints 14 at its respective ends. Further, the vehicle body includes third joints 16 rotatably coupled to the respective first joints 12 and fourth joints 17 rotatably coupled to the respective second joints 14, and a pair of connection members 15 that connect the vehicle body-side tubes 8 with the relay member 13.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a saddle-ride type vehicle configured to ride across a vehicle body such as a motorcycle.

  2. Description of the Related Art Conventionally, in a saddle-ride type vehicle such as a motorcycle, for example, as disclosed in Patent Document 1, a front fork that supports an axle of a front wheel is rotatably attached to a body frame, and a handle is attached to the front fork. A structure in which the vehicle body is steered by providing a vehicle is widely used.

  Here, the conventional front fork is positioned between both sides of the front wheel in the vehicle width direction and supports both ends of the front wheel axle. It has a pair of vehicle body side tubes configured to absorb and attenuate the impact received by the front wheels from the road surface, and a bracket that holds the vehicle body side tubes at both ends and includes a steering shaft at the center. And it is comprised so that a steering shaft may be inserted in the head pipe provided in the front-end part of the vehicle body frame. Here, the bracket is generally composed of two parts: an upper bracket located above the front end of the body frame and an under bracket located below.

JP-A-8-26169

  By the way, in such a saddle-ride type vehicle, force is applied to the wheels from the road surface when accelerating or decelerating. For example, when the brake is applied during traveling, a force from the front to the rear is applied to the front wheel 105 of the front fork 104 by the road surface G as shown in FIG. Here, although the front fork 104 is supported on the vehicle body frame 103 by the upper bracket 109a and the under bracket 109b, even the under bracket 109b near the front wheel 105 is located away from the axle 106 of the front wheel 105. For this reason, if the rigidity of the front fork 104 or the vehicle body frame 103 is low, the front fork 104 may bend and the wheel side tube 107 may not be able to smoothly move forward and backward with respect to the vehicle body side tube 108. Further, if the rigidity of the front fork 104 and the vehicle body frame 103 is increased in order to resist the force that the front wheel 105 receives from the road surface G, the vehicle weight will be significantly increased.

  An object of the present invention is to solve such problems, and it is possible to effectively receive the force that the front wheels receive from the road surface, thereby suppressing the bending of the front fork, and the vehicle weight. An object of the present invention is to provide a new saddle-ride type vehicle that can reduce the above-mentioned problem.

The present invention includes a front fork that is rotatably supported by a vehicle body, the front fork supporting a pair of wheel-side tubes that support an axle of a front wheel, and a pair of vehicle bodies that support the wheel-side tubes so as to advance and retreat. A saddle-ride type vehicle comprising: a side tube; and a bracket that is rotatably supported by the vehicle body while holding the vehicle body side tube on both sides,
The vehicle body side tube is provided with a first joint portion at a position located on the front wheel side from the bracket,
The vehicle body includes a relay member that is rotatably supported by the vehicle body and includes second joint portions at both ends,
And a third joint part rotatably connected to the first joint part and a fourth joint part rotatably connected to the second joint part, and connecting the vehicle body side tube and the relay member. A saddle-ride type vehicle having a pair of members.

  Thus, in the saddle-ride type vehicle, it is preferable that the connecting member includes an adjustment mechanism that changes the overall length of the connecting member.

  Moreover, it is preferable that the connection of the first joint part and the third joint part and the connection of the second joint part and the fourth joint part are by a ball joint mechanism.

  And the said connection member may be comprised so that it may have a curved part which becomes convex toward the vehicle width direction outer side of the said vehicle body.

  Further, the vehicle body includes a vehicle body frame that rotatably supports the front fork and an engine that is held by the vehicle body frame, and the relay member is rotatably supported by the engine. You may comprise.

  In the saddle-ride type vehicle of the present invention, the vehicle body side tube of the front fork is provided with a first joint portion at a position located on the front wheel side of the bracket, and the intermediate portion of the vehicle body is rotatable to the vehicle body. A relay member that is supported and includes second joint portions at both ends is provided. And a third joint part rotatably connected to the first joint part and a fourth joint part rotatably connected to the second joint part, and a pair of connecting members for connecting the vehicle body side tube and the relay member. Provided. That is, the front fork is supported by the vehicle body by a connecting member that is connected to a portion located on the front wheel side relative to the bracket, and the force that the front wheel receives from the road surface can be received by this connecting member. Therefore, the bending of the front fork during acceleration or deceleration can be suppressed. Further, since it is not necessary to increase the rigidity of the front fork and the vehicle body as in the prior art, the vehicle weight can be reduced. The connecting member is pivotally connected to the vehicle body side tube, and is also pivotally connected to the relay member. Therefore, when the front fork is turned when turning right or left, the movement of the connecting member is also possible. Will not be disturbed. Therefore, the same steering performance as that of the conventional saddle riding type vehicle can be obtained.

  By the way, if the processing accuracy of the members related to the connecting member and the accuracy of the attachment position are low, the backlash between the members becomes large or the members do not move smoothly, and the above-mentioned effects cannot be obtained sufficiently. However, when an adjustment mechanism for changing the total length of the connecting member is provided on the connecting member, the adjusting mechanism can absorb even if the accuracy is somewhat low. That is, the processing cost can be suppressed and the assemblability is improved. Moreover, the above-mentioned effect can be obtained more advantageously by using a ball joint mechanism for connecting the first joint part and the third joint part and connecting the second joint part and the fourth joint part.

  When the connecting member is provided with a curved portion that protrudes outward in the vehicle width direction of the vehicle body, it is possible to avoid interference between the connecting member and the front wheel when the front fork is rotated during a right turn or a left turn. . That is, the movable range of the front fork can be expanded by providing the connecting member with a curved portion.

  Since the relay member is connected to the vehicle body side tube closer to the wheel than the bracket via the connecting member, for example, when the engine is provided at a position close to the road surface, it is connected to the engine rather than the vehicle body frame. By providing, the length of the connecting member that connects the vehicle body side tube and the relay member is shortened, and the rigidity of the connecting member can be increased. As described above, when the relay member is attached, the relay member may be provided in an optimal place according to the layout of the vehicle body, and may be an engine without being limited to the vehicle body frame.

It is the figure which showed typically one Embodiment of the saddle-ride type vehicle according to this invention from the left side surface. It is the figure which showed typically the front fork in FIG. 1, and its peripheral member. 1A is a plan view schematically showing an adjustment mechanism for changing the overall length of a connecting member, and FIG. 1B is a side view schematically showing a ball joint mechanism. It is sectional drawing. It is a modification of the connection member in FIG. 1, Comprising: (a) is a top view explaining the state at the time of going straight, (b) is a top view explaining the state at the time of a left turn. It is a figure explaining the force at the time of applying a brake during driving, (a) is a left side view in the conventional saddle riding type vehicle, (b) is a left side view in the saddle riding type vehicle shown in FIG. FIG.

  Hereinafter, an embodiment of a saddle-ride type vehicle according to the present invention will be described with reference to the drawings. In the present specification and the like, “up”, “down”, “left”, “right”, “up”, and “down” refer to directions for riders riding in saddle riding type vehicles.

  In FIG. 1, reference numeral 1 denotes a motorcycle which is an embodiment of a saddle-ride type vehicle according to the present invention. The motorcycle 1 includes a vehicle body indicated by reference numeral 2. The vehicle body 2 includes a vehicle body frame 3 that forms the skeleton of the motorcycle 1 and an engine (not shown). The vehicle body frame 3 of the present embodiment includes a U-shaped upper frame 3a extending forward, upward, and rear, and a front lower end portion and a rear lower end portion of the upper frame 3a, and is connected between the upper frame 3a. And a lower frame 3b that forms a space K. Although not shown, a seat on which a rider rides is provided on the upper surface of the upper frame 3a, and an engine is disposed in the space K. A head pipe (not shown) extending in the vertical direction is provided at the front end of the upper frame 3a.

  A front fork 4 is provided in front of the vehicle body 2. As shown in FIG. 2, the front fork 4 includes a left wheel side tube 7 </ b> L and a right wheel side tube 7 </ b> R that support the axle 6 of the front wheel 5. Further, a left vehicle body side tube 8L that supports the left wheel side tube 7L so as to be able to advance and retreat is provided above the left wheel side tube 7L, and the right wheel side tube 7R can be advanced and retracted above the right wheel side tube 7R. A right vehicle body side tube 8 </ b> R is provided. Hereinafter, the left wheel side tube 7L and the right wheel side tube 7R are collectively referred to as a wheel side tube 7, and the left vehicle body side tube 8L and the right vehicle body side tube 8R are collectively referred to as a vehicle body side tube 8.

  Here, although a detailed description and illustration are omitted between the wheel side tube 7 and the vehicle body side tube 8, a shock absorbing mechanism that supports the front wheel 5 at a predetermined position and absorbs an impact received by the front wheel 5 from the road surface. Is provided. The front fork 4 of this embodiment is an inverted type in which the wheel side tube 7 has a smaller diameter than the vehicle body side tube 8 (the wheel side tube 7 is an inner tube and the vehicle body side tube 8 is an outer tube). Is.

  The front fork 4 includes a bracket 9 that holds the vehicle body side tube 8 at both ends of the left and right sides. The bracket 9 according to the present embodiment includes an upper bracket 9a positioned above the front end portion of the vehicle body frame 3 and an under bracket 9b positioned below the front end portion of the vehicle body frame 3. A steering shaft 10 having an upper end supported by the upper bracket 9a and a lower end supported by the under bracket 9b is provided at an intermediate portion between the upper bracket 9a and the under bracket 9b. The steering shaft 10 is inserted through the head pipe of the vehicle body frame 3, and thereby the front fork 4 is rotatably supported by the vehicle body frame 3. Although not shown, the upper bracket 9a is provided with a handle for steering the motorcycle 1.

  In the left vehicle body side tube 8L, a left holder 11L is provided at a lower end portion located on the front wheel 5 side with respect to the under bracket 9b. One joint portion 12L is provided (see FIG. 2). A right holder 11R and a right first joint portion 12R having the same configuration are also provided at the lower end portion of the right vehicle body side tube 8R. Hereinafter, the left holder 11L and the right holder 11R are collectively referred to as a holder 11, and the left first joint portion 12L and the right first joint portion 12R are collectively referred to as a first joint portion 12.

  Further, as shown in FIG. 1, the vehicle body 2 is provided with a relay member 13 whose intermediate portion is rotatably supported by the lower frame 3b. As shown in FIG. 2, a left second joint portion 14L having the same configuration as the left first joint portion 12L described above is provided at the left end portion of the relay member 13, and a right second end portion is provided with a right second end portion. Two joint portions 14R are provided. Hereinafter, the left second joint portion 14L and the right second joint portion 14R are collectively referred to as the second joint portion 14.

  Between the holder 11 and the relay member 13, a rod-like left connecting member 15 </ b> L that connects the holder 11 and the relay member 13 on the left side of the body frame 3, and the holder 11 and the relay member 13 on the right side of the body frame 3. 15R is provided. The left connecting member 15L has a left third joint portion 16L formed as a circular hole that is rotatably connected to the left first joint portion 12L, and a circular shape that is rotatably connected to the left second joint portion 14L. The left fourth joint portion 17L formed as a hole is provided. On the right side of the body frame 3, a right connecting member 15R having the same shape as the left connecting member 15L, a right third joint portion 16R provided as a circular hole in the right connecting member 15R, and a right fourth joint A portion 17R is provided. Hereinafter, the left connecting member 15L and the right connecting member 15R are collectively referred to as a connecting member 15, the left third joint portion 16L and the right third joint portion 16R are collectively referred to as a third joint portion 16, and the left fourth joint portion 17L. And the right fourth joint portion 17R are collectively referred to as a fourth joint portion 17.

  The first joint portion 12 may be connected to the third joint portion 16 so as to be rotatable, and the second joint portion 14 may be connected to the fourth joint portion 17 so as to be rotatable. It can be changed. For example, the first joint portion 12 and the second joint portion 14 formed in a cylindrical shape are formed as circular holes, and the third joint portion 16 and the fourth joint portion 17 formed as circular holes are formed in a cylindrical shape. May be.

  Further, a rear arm 19 that is rotatably supported by a pivot shaft 18 is provided behind the vehicle body frame 3, and the rear arm 19 supports an axle 21 of the rear wheel 20.

  Incidentally, as shown in FIG. 5A, the front fork 104 in the conventional motorcycle has an upper end portion and an intermediate portion held by the vehicle body frame 103 by an upper bracket 109a and an under bracket 109b. On the other hand, in the front fork 4 of the motorcycle 1 described above, in addition to the upper bracket 9a and the under bracket 9b, the holder 11 provided at the lower end portion of the vehicle body side tube 8 is connected to the vehicle body frame 3 via the connecting member 15 and the relay member 13. Therefore, the front fork 4 is also held by the vehicle body frame 3 in addition to the upper end portion and the intermediate portion, and the lower end portion of the front fork 4 excluding the wheel side tube 7. Therefore, for example, even if a brake is applied during traveling and a force is applied from the road surface G toward the front wheel 5 from the front to the rear as shown in FIG. 4 can be suppressed. That is, even when a force is applied to the front wheel 5 from the road surface G, the wheel side tube 7 can smoothly advance and retreat with respect to the vehicle body side tube 8. Further, since the bending of the front fork 4 is suppressed by the connecting member 15 and the like, it is not necessary to increase the rigidity of the front fork 4 and the vehicle body frame 3 more than necessary, and the vehicle weight can be reduced. The connecting member 15 is rotatably connected to the vehicle body side tube 8 by the first joint portion 12 and the third joint portion 16, and the relay member 13 is connected by the second joint portion 14 and the fourth joint portion 17. In addition, since it is pivotably connected, the movement of the front fork 4 is not hindered when the handle is operated. That is, also in the motorcycle 1, the same steering performance as that of the conventional motorcycle can be obtained.

  In such a motorcycle 1, it is preferable to provide an adjustment mechanism that changes the overall length of the connecting member 15. As such an adjustment mechanism, for example, as shown in FIG. 3A, the connecting member 15 is divided into a front connecting member 15F and a rear connecting member 15B, and the front connecting member 15F and the rear connecting member 15B are turned into a turnbuckle 22. And those connected by By the way, when the processing accuracy of the members related to the connecting member 15 and the accuracy of the attachment position are low, the backlash between the members becomes large or the members do not move smoothly, and the effect of suppressing the bending of the front fork 4 is obtained. Although not sufficiently obtained, when such an adjustment mechanism is provided, even if the accuracy is somewhat inferior, it can be absorbed by this adjustment mechanism. That is, the processing cost can be suppressed and the assemblability is improved.

  In addition, the connection of the first joint part 12 and the third joint part 16 and the connection of the second joint part 14 and the fourth joint part 17 described above are one in a cylindrical shape and the other is a circular hole. However, it is preferable to connect with a ball joint mechanism. As such a ball joint mechanism, for example, as shown in FIG. 3B, the first joint portion 12 has a convex spherical surface, and the third joint portion 16 has a concave spherical surface. To do. In the case of providing such a ball joint mechanism, the reduction in processing accuracy and mounting position accuracy described above can be absorbed by this ball joint mechanism, so that the processing cost can be reduced and the assemblability can be improved more advantageously. Can do.

  Further, the connecting member 15 described above extends linearly in the front-rear direction, but as shown in FIG. 4 (a), includes a curved portion 15W that protrudes outward in the vehicle width direction of the vehicle body. You may comprise as follows. Here, FIG. 4A is a plan view schematically showing members related to the connecting member 15 and shows a state in which the motorcycle 1 goes straight. 4B, assuming that the motorcycle 1 turns left as shown in FIG. 4B, even if the angle of the linear connecting member 15 causes the front wheel 5 to interfere with the connecting member 15, the bending portion It can be seen that the connecting member 15 having 15 W can avoid interference with the front wheel 5. That is, the movable range of the front fork 4 can be expanded by using the connecting member 15 including the curved portion 15W.

  In this embodiment, the vehicle body frame 3 is composed of the upper frame 3a and the lower frame 3b, and the relay member 13 is supported by the lower frame 3b. However, when the engine is provided at a position close to the road surface, for example, the lower frame The relay member 13 may be provided in the engine by omitting 3b. By comprising in this way, material cost can be restrained by the part which the lower frame 3b is omitted. Further, since the portion where the relay member 13 is connected to the front fork 4 is the lower end portion of the vehicle body side tube 8, when the engine is close to the road surface, the vehicle body side tube 8 and the relay member 13 are preferably provided with the relay member 13 on the engine. The interval of becomes shorter. That is, since the length of the connecting member 15 that connects the vehicle body side tube 8 and the relay member 13 becomes shorter, the rigidity of the connecting member 15 can be increased. Thus, the place where the relay member 13 is provided is not limited to the vehicle body frame 3, and may be provided in an optimal place depending on the layout of the vehicle body.

  Note that the saddle-ride type vehicle according to the present invention is not limited to the embodiments described so far, and may be modified in various ways within the scope of the claims, or may have other configurations added thereto. It may be a thing.

1: Motorcycle 2: Vehicle body 3: Vehicle frame 3a: Upper frame 3b: Lower frame 4: Front fork 5: Front wheel 6: Axle 7: Wheel side tube 7L: Left wheel side tube 7R: Right wheel side tube 8: Vehicle side Tube 8L: Left vehicle body side tube 8R: Right vehicle body side tube 9: Bracket 9a: Upper bracket 9b: Under bracket 10: Steering shaft 11: Holder 11L: Left holder 11R: Right holder 12: First joint portion 12L: First left Joint part 12R: Right first joint part 13: Relay member 14: Second joint part 14L: Left second joint part 14R: Right second joint part 15: Connecting member 15B: Rear connecting member 15F: Front connecting member 15L: Left Connecting member 15R: Right connecting member 15W: Curved portion 16: Third joint portion 16L Left third joint portion 16R: Right third joint portion 17: Fourth joint portion 17L: Left fourth joint portion 17R: Right fourth joint portion 18: Pivot shaft 19: Rear arm 20: Rear wheel 21: Axle 22: Turnbuckle 103: body frame 104: front fork 105: front wheel 106: axle 107: wheel side tube 108: body side tube 109a: upper bracket 109b: under bracket G: road surface K: space

Claims (5)

A front fork rotatably supported by the vehicle body, the front fork supporting a pair of wheel side tubes that support the axle of the front wheel; a pair of vehicle body side tubes supporting the wheel side tube so as to be able to advance and retreat; A saddle-ride type vehicle comprising: a bracket that is rotatably supported by the vehicle body while holding the vehicle body side tube on both sides;
The vehicle body side tube is provided with a first joint portion at a position located on the front wheel side from the bracket,
The vehicle body includes a relay member that is rotatably supported by the vehicle body and includes second joint portions at both ends,
And a third joint part rotatably connected to the first joint part and a fourth joint part rotatably connected to the second joint part, and connecting the vehicle body side tube and the relay member. A saddle-ride type vehicle having a pair of members.   The saddle-ride type vehicle according to claim 1, wherein the connecting member includes an adjusting mechanism that changes a total length of the connecting member.   The saddle riding type vehicle according to claim 1 or 2, wherein the connection of the first joint part and the third joint part and the connection of the second joint part and the fourth joint part are by a ball joint mechanism.   The saddle riding type vehicle according to any one of claims 1 to 3, wherein the connecting member has a curved portion that protrudes outward in the vehicle width direction of the vehicle body.   The vehicle body includes a vehicle body frame that rotatably supports the front fork and an engine held by the vehicle body frame, and the relay member is rotatably supported by the engine. The saddle riding type vehicle according to any one of Items 1 to 4.

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