JP5606253B2 - Vehicle handle support structure - Google Patents

Description

  The present invention relates to a handle support structure for supporting a steering wheel for steering a front wheel in a vehicle such as a motorcycle.

  For example, in a conventional general integrated handle support structure for a motorcycle, a left and right integrated handle bar is attached to an upper bracket fixed to an upper end portion of a front fork that supports a front wheel via a handle holder. On the other hand, as a conventional separate-type handle support structure, a pair of left and right handle bars supported by a pair of left and right handle holders fitted to the top of a front fork is also known (Patent Document 1). The handle holder with this separate support structure has a ring-shaped holder body that has a fitting hole for fitting the front fork, and can be elastically deformed by a split groove formed so as to continue to the fitting hole. A single bar-shaped holding portion for holding the handle bar is connected to a part of the holder main body that is opposed to the split groove in the radial direction via the fitting hole. In this handle holder, when the front fork is fitted in the fitting hole, the holder main body is elastically deformed into a shape in which the fitting hole is reduced in diameter by the tightening force of the fastening member passing through the split groove. Fastened to the outer peripheral surface of the front fork.

JP-A-11-99979

  However, in the above-described separate support structure, the portion of the ring-shaped holder body that faces the split groove in the radial direction is the portion where the bending moment acts most when the holder body is elastically deformed by the tightening force of the fastening member. However, since the rod-shaped holding portion is provided at this portion, the rigidity of the holder body is increased, the elasticity around the split groove is lowered, and the tightening operation of the holder body to the front fork becomes troublesome.

  In addition, depending on the driver of the motorcycle, there is a case where the position of the handle bar is desired to be increased in order to adjust the riding position to his / her preference. In this case, since the handle holder of the conventional support structure has a single holding portion for holding the handle bar formed in the holder main body, the holding portion extends upward from the holder main body and further extends to the side. In order to obtain a sufficient support strength for the handlebar, it is necessary to set the shape of the hold portion large. By doing so, the handle holder becomes bulky and looks bad, the weight increases, the rigidity of the holder body further increases, and the elasticity around the split groove further decreases.

  The present invention provides a vehicle handle that can support a handlebar with sufficient strength while suppressing a decrease in elastic deformation due to excessive rigidity of the handle holder even when the position of the handlebar is increased. The object is to provide a support structure.

  To achieve the above object, a vehicle handle support structure according to the present invention is a handle support structure in which a handle bar is supported by a handle holder fitted to a front fork that supports a front wheel. A base portion that is elastically deformable by a split groove, a hold portion that holds the handle bar, and a plurality of arm portions that connect the hold portion to the base portion, wherein the arm portions are The base portion is disposed so as to be separated in the circumferential direction, and the base portion is elastically deformed and fastened to the outer peripheral portion of the front fork by a fastening force of a fastening member.

  According to this vehicle handle support structure, since the hold portion is connected to the base portion via a plurality of arm portions, when setting the arm portion long in order to keep the position of the handlebar away from the front fork, each arm portion The handle bar can be supported with high strength through the holding portion by the plurality of arm portions even if both the thickness and the width are small. In addition, since the thickness and width of each arm portion can be reduced, the handle holder does not become excessively rigid and has sufficient elasticity. Moreover, compared to the case where a single arm portion is provided, when the same support strength is obtained for the holding portion, the provision of multiple arms eliminates the overall bulkiness and reduces the weight to reduce the weight of the handle holder. Can also be planned.

  In this invention, it is preferable that each said arm part is connected to the said base part in the 2nd area | region except the 1st area | region on the opposite side to the said split groove with respect to the axial center position of the said base part. According to this configuration, since the arm portion does not exist in the first region where the bending moment acts most when the base portion is elastically deformed by the tightening force of the fastening member, the rigidity of the first portion is reduced in the base portion. By doing so, sufficient elasticity can be secured, and therefore the base portion can be fastened to the outer peripheral portion of the front fork with a sufficient tightening force.

  In the configuration in which each arm portion is connected to the base portion in the second region, the split groove is disposed on one side portion of the base portion, and the hold portion is eccentric from the base portion to the other side. It is preferable that they are arranged. As a result, the upper part of the center of the base part is opened, so that it becomes easy to access the upper end part of the front fork located at the center and adjust the fork characteristics. In addition, since each arm portion connected to the holding portion also extends from the base portion toward the other side, the base portion has a lower rigidity in addition to the first region, and the elasticity is further increased. It can be secured, and can be securely fastened to the outer periphery of the front fork with a sufficient tightening force.

  In the present invention, the two arm portions are provided, and the two arm portions and the base portion have a first opening near the axis of the base portion and a second opening away from the axis. It is preferable that the first opening is larger than the second opening. As described above, since the first opening near the axis of the base portion is large, the upper end portion of the front fork to which the base portion is fastened to the outer peripheral portion is sufficiently exposed from the handle holder. The adjustment screw and the adjustment bolt can be easily operated.

  In the present invention, it is preferable that the split groove of the base portion is disposed inside the vehicle body with respect to the axis of the base portion. As a result, the split groove is disposed inside the vehicle body where a marginal space can be easily obtained, so that the fastening operation of the fastening member attached to the split groove is facilitated, and the split groove is located on the vehicle body more than the shaft center of the base portion. It is possible to prevent the fastening member attached to the split groove from coming into contact with a peripheral member such as a fuel tank when the handle is operated, as in the case where it is disposed outward.

  According to the vehicle handle support structure of the present invention, since the arm portion for connecting the hold portion to the base portion is provided, when the arm portion is set to be long in order to keep the position of the handlebar away from the front fork, Even if the thickness and width of the arm part are both small, the handlebar can be supported with high strength via the holding part.

1 is a side view showing a front portion of a motorcycle equipped with a handle support structure according to an embodiment of the present invention. It is a top view of the front part of the motorcycle same as the above. It is the perspective view which looked at the handle holder of the handle | steering-wheel support structure same as the above from the diagonal side of the vehicle body. It is the side view which looked at the handle holder same as the above from the vehicle body inner side. It is the top view which fractured | ruptured a part of handle holder same as the above. It is a side view of a handle holder same as the above. It is the top view seen from diagonally upward of the handle holder same as the above. It is the perspective view which looked at the state which attached the handle holder same as the above to the front fork from diagonally upward. It is a longitudinal cross-sectional view of the state which attached the handle holder same as the above to the front fork and the upper bracket.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of a front portion of a motorcycle having a handle support structure according to an embodiment of the present invention. A head pipe 3 is provided at the front end of the main frame 1 forming the front half of the vehicle body frame FR, and a front fork 8 is pivotally supported on the head pipe 3 via a steering shaft (not shown). A front wheel 4 is attached to the lower end of the front fork 8. A pair of left and right steering bars 13 for steering are supported on the upper end of the front fork 8 at a high position spaced upward from an upper bracket 9 attached to the top of the front fork 8.

  A fuel tank 14 is disposed at the upper part of the main frame 1, and an engine E is supported at the lower part. A resin cowling 10 that covers a portion from the front of the upper end portion of the front fork 8 to the side of the front portion of the vehicle body is attached to the front portion of the vehicle body frame FR. A headlamp unit 11 is attached to the cowling 10. A wind screen 15 is provided above the head wrap unit 11 in the cowling 10 to cover the front of the vehicle body and protect the rider from the traveling wind.

  In FIG. 2, which is a plan view of the front portion of the motorcycle, the front fork 8 includes a pair of left and right fork tubes 80, 80, and handle holders 12, 12 are fixed to the upper ends of the fork tubes 80, 80. ing. Although details of the handle holder 12 will be described later, the handle bar 13 is supported by a holding portion 19 at the top of the handle holder 12. A brake lever 20, a master cylinder 21, a switch box 22A and a throttle case 23 are attached to the right handle bar 13, and a clutch lever 25, a bracket 26 and a switch box 22B for supporting the clutch lever 25 are attached to the left handle bar 13. It is attached.

  In FIG. 3, the handle holder 12 includes a base portion 18 that is elastically deformable by a split groove 24, a hold portion 19 that holds the handle bar 13 (FIG. 2), and the hold portion 19 connected to the base portion 18. The two arm portions 28 and 28 are integrally formed by casting. The base portion 18 has a fitting hole 29 having a diameter that is fitted into the upper end portion of the fork tube 80 constituting the front fork 8 with a slight gap, and a pair of fastening pieces 30, 30 protruding to one side. The split groove 24 is provided between the fastening pieces 30 and 30. That is, the fastening pieces 30 are formed at both ends in the circumferential direction of the fitting hole 29 formed in a substantially C shape. Both fastening pieces 30, 30 face each other with the split groove 24 interposed therebetween. In the region where the split groove 24 is formed, the fitting holes 29 are reduced in diameter by elastically deforming the fastening pieces 30 so as to come close to each other, thereby pressing the fork tube 80 in the radial direction. As a result, the fitting hole 29 sandwiches the fork tube 80 and the handle holder 12 is supported on the upper end portion of the front fork 8.

  Each of the two arm portions 28 and 28 extends upward in a direction away from the split groove 24 with respect to the radial direction of the fitting hole 29. Each arm portion 28 is close to each other as it goes upward, and is connected to the hold portion 19 at the upper end.

  Next, the positional relationship between the two arm portions 28 and 28 with respect to the split groove 24 will be described. In FIG. 5, which is a plan view in which both arm portions 28, 28 are broken horizontally, the root portions 28 a, 28 a that are the lower ends of the two arm portions 28, 28 are arranged in the circumferential direction of the fitting hole 29 from the split groove 24. Is set at a position separated by a predetermined angle θ2, and the predetermined angle θ2 is preferably about 15 ° to 30 °. Thereby, since the rigidity around the split groove 24 in the base portion 18 is sufficiently lowered, the elastic deformation of the pair of fastening pieces 30 and 30 is facilitated.

  Further, the two arm portions 28, 28 and the base portion 18 shown in FIG. 3 are separated from the axial center C of the base portion 18, that is, the first opening 38 near the axial center of the fitting hole 29 and the axial center C. The second opening 39 is formed apart from the first opening 38, and the first opening 38 is set larger than the second opening 39. As shown in FIG. 4, the second opening 39 has a shape close to a vertically long rectangle. The first opening 38 is located above the fitting hole 29 and opens in an inclined direction from the fitting hole center C to a position above the split groove 24.

  The left tightening piece 30 in FIG. 5 is formed with an insertion hole 31 for a later-described tightening bolt, and the other tightening piece 30 is formed with a screw hole 32 into which the bolt is screwed. The two arm portions 28, 28 are formed so as to extend upward from the peripheral portion of the fitting hole 29 in the base portion 18, and the positions where the arm portions 28, 28 are formed are axial centers in the base portion 18. This is a second region 34 excluding the first region 33 on the side opposite to the split groove 24 with respect to C, that is, on the side facing the split groove 24 in the radial direction. The first region 33 includes a region center 35 that faces the split groove 24 by 180 °, and the angle θ1 with respect to the axis C of the base portion 18 on the opposite side is in the range of 20 ° to 100 °, preferably 30 ° to 90 °. It is a part in the range, more preferably in the range of 40 ° to 80 °. The first region 33 in the base portion 18 is formed with a smaller thickness in the radial direction of the fitting hole 29 than the second region 34. The two arm portions 28 and 28 are arranged at positions facing each other with respect to the fitting hole center C.

  Both arm portions 28 and 28 have irregular shapes in which the cross-sectional shape is close to a rhombus. That is, the arm portion 28 is formed in a cross-sectional shape in which the thickness of the portion on the split groove 24 side and the first region 33 side facing the split groove 24 in the radial direction is thin and the central portion has a large thickness. . Further, a protruding piece 40 projecting sideways is formed integrally with the base portion 18, and a stepped bolt insertion hole 41 to be screwed into the screw hole of the upper bracket 9 of FIG. 1 is formed in the protruding piece 40. .

  As shown in FIG. 3, the hold portion 19 has a shape that connects the upper ends of the two arm portions 28, 28. As shown in FIG. 6, the holding portion 19 is formed with a fitting hole 42 of the handle bar 13, a tightening bolt insertion hole 43, and a stop bolt receiving hole 44.

  FIG. 7 is a plan view of the state in which the handle holder 12 is mounted on the upper bracket 9. The split groove 24 is arranged on one side of the base portion 18 closer to the vehicle body front inner side. Is eccentrically arranged from the axial center C to the other side closer to the rear outer side. Accordingly, each arm portion 28 connected to the hold portion 19 has a shape extending from the base portion 18 toward the other side. Further, as described in FIG. 3, the first opening 38 is set larger than the second opening 39, so that the handle holder 12 is fitted in the fitting hole of the base portion 18 as clearly shown in FIG. 7. Most of 29 has a shape that can be visually recognized from the position directly above. Therefore, when mounted on a motorcycle, the upper end portion of the fork tube 80 fitted in the fitting hole 29 is exposed in the upward direction. At the upper end of the fork tube 80, a spring initial adjusting bolt 52 and an oil attenuation adjusting screw 53 are provided.

  When the handle support structure is attached to the motorcycle, as shown in FIG. 9, the fitting hole of the base portion 18 of the handle holder 12 is formed at the upper end of the fork tube 80 protruding upward from the fitting hole 48 of the upper bracket 9. After fitting 29, as shown in FIG. 8, the tightening bolt 49 is inserted into the insertion hole 31 of the base portion 18, passes through the split groove 24, and is screwed into the screw hole 32. As a result, the pair of fastening pieces 30, 30 are close to each other and elastically deformed so that the groove width of the split groove 24 is narrowed, and the fitting hole 29 of the base portion 18 is reduced in diameter so that the handle is attached to the outer peripheral portion of the fork tube 80. The holder 12 is fastened.

  On the other hand, as shown in FIG. 9, the holding bar 19 is inserted into the insertion hole 43 and the receiving hole 44 while the handle bar 13 is inserted into the insertion hole 42 and pressed against the bottom surface of the hold part 19. The handle bar 13 is attached to the handle holder 12 by being screwed into a screw hole (not shown) of the handle bar 13. Thus, the handle bar 13 is supported on the front fork 8 via the handle holder 12. Further, a stepped bolt (not shown) is screwed into a screw hole (not shown) of the upper bracket 9 through the insertion hole 41 of the base portion 18 of FIG. It is prevented from rotating.

  In this embodiment, a handle support structure of a type that holds the handle bar 13 at a high position spaced above the upper bracket 9 is illustrated. In this handle support structure, the hold portion 19 of the handle holder 12 in FIG. The two arm portions 28 and 28 connected to the base portion 18 are elongated in the vertical direction. Here, since the two arm portions 28 and 28 are spaced apart from each other in the circumferential direction of the fitting hole 29 of the base portion 18, each arm portion 28 and 28 has a thickness t and a width shown in FIG. 5. Even if W has a small shape, the handle bar 13 can be supported with high strength by the two arm portions 28 and 28 via the hold portion 19.

  Since the two arm portions are spaced apart from each other in a shape having a small thickness and width, the base portion 18 does not have excessively high rigidity and can secure sufficient elasticity. Moreover, since the two arm portions 18 are provided, the bulky impression disappears when the same support strength is obtained for the hold portion 19 as compared with the case where a single connection piece is provided as in the conventional case. Further, the overall weight can be reduced, and the handle holder 12 itself can be reduced in weight.

  Further, as described in FIG. 5, the two arm portions 28, 28 have a base in the second region 34 excluding the first region 33 opposite to the split groove 24 with respect to the axis C of the base portion 18. Connected to the unit 18. That is, the arm portions 28 and 28 are not provided in the first region 33 where the bending moment acts most when the base portion 18 is elastically deformed by the tightening force of the tightening bolts 49 that tighten the tightening pieces 30 and 30. Therefore, the base portion 18 can secure sufficient elasticity by reducing the rigidity of the first region 33, and can be fastened to the outer peripheral portion of the fork tube 80 by generating a sufficient tightening force. .

  In order to obtain such an effect, the angle θ1 of the base portion 18 on the side opposite to the split groove 24 with respect to the axial center C position of the base portion 18 is set to 20 ° to 100 ° as described above. It is preferable to set it in a portion that falls within the range of °. When the angle θ1 is less than 20 °, the rigidity of the base portion 18 is increased. When the angle θ1 is 100 ° or more, the width of the arm portion 28 is decreased and the support strength of the hold portion 19 is decreased.

  As described with reference to FIG. 7, the split groove 24 is arranged on one side of the base portion 18, and the hold portion 19 is arranged eccentrically from the base portion 18 to the other side. That is, since the upper part of the axial center C of the fitting hole 29 is opened, it becomes easy to access the upper end portion of the fork tube 80 located at the center and adjust the fork characteristics. In addition, since the arm portions 28 and 28 connected to the hold portion 19 also extend from the base portion 18 to the other side, the base portion 18 has a lower rigidity around the split groove 24 in addition to the first region 33. As a result, even greater elasticity can be secured, and the outer periphery of the fork tube 80 can be securely fastened with a sufficient tightening force.

  As described in FIG. 3, the first opening 38 near the axis C formed by the two arm portions 28, 28 and the base portion 18 is more than the second opening 39 far from the axis C. Since the upper end of the fork tube 80 forming the front fork 8 is sufficiently exposed from the handle holder 2, as shown in FIG. 7, the initial adjustment bolt at the upper end of the fork tube 80 is clearly set. 52 and the attenuation adjustment screw 53 can be easily operated, and the maintenance is improved.

  As described with reference to FIG. 7, when the handle holder 12 is fastened to the fork tube 80, the split groove 24 of the base portion 18 extends inwardly of the vehicle body from the axis C of the base portion 18, that is, the center extending in the longitudinal direction of the vehicle body. Since it is located closer to the shaft, the split groove 24 is located inward of the vehicle body where a marginal space can be easily obtained. As a result, the tightening operation of the tightening bolt 49 to be mounted in the split groove 24 is facilitated, and the handle operation is performed as in the case where the split groove 24 is arranged on the outer side of the vehicle body with respect to the axis C of the base portion 18. Sometimes, the tightening bolt 49 attached to the split groove 24 does not come into contact with a peripheral member such as the fuel tank 14.

  Further, as described with reference to FIG. 5, the two arm portions 28, 28 have a shape in which the cross section is close to a rhombus. That is, the arm portion 28 has a flat cross-sectional shape in which the thickness of the split groove 24 side and the portion of the first region 33 side facing the split groove 24 in the radial direction is thin, and the central portion has a large thickness t. As a result, the bulky impression disappears and the appearance is improved. In addition, it can replace with making the cross-sectional shape close | similar to a rhombus the arm part 28, and can obtain the effect similar to the above-mentioned also by making it a cross-sectional shape close | similar to an ellipse.

  Note that the number of arm portions 28 is not limited to two, and three or more arm portions 28 may be provided. In any case, if the arm portions are spaced apart from each other in the circumferential direction of the fitting hole 29 of the base portion 18, Similar effects can be obtained. Further, since the handle holder 12 can be manufactured as an integrally molded product by casting, as shown by a two-dot chain line in FIG. 8, a stay 57 for supporting the reserve tank 17 (FIG. 2) is integrally formed on the hold portion 19. You can also In the conventional handle support structure, the reserve tank 17 in FIG. 2 is supported on the master cylinder 21 via a separate mounting bracket. However, if the stay 57 in FIG. No bracket is required.

  In the above-described embodiment, the motorcycle is described as an example of the vehicle. However, the present invention can be applied to other vehicles having a front fork, for example, a tricycle for traveling on rough terrain. The present invention can also be applied to a motorcycle equipped with an electric motor instead of an engine, or a motorcycle equipped with both an engine and an electric motor and obtaining a driving force with either one or both powers. Furthermore, in the above embodiment, the handle holder 12 and the handle bar 13 shown in FIG. 7 are detachably formed separately, but even when the handle holder 12 and the handle bar 13 are integrally formed, It is included in the present invention. Moreover, in the said embodiment, although the dividing groove 24 is arrange | positioned in the vehicle width direction inner side, in consideration of the relationship with the upper bracket 9 and another member, even if the dividing groove 24 is arrange | positioned in the vehicle width direction outer side. Good.

  The present invention is not limited to the contents shown in the above embodiments, and various additions, modifications, or deletions can be made without departing from the gist of the present invention. It is included in the range.

4 Front wheel 8 Front fork 12 Handle holder 13 Handle bar 18 Base part 19 Hold part 24 Split groove 28 Arm part 33 First region 34 Second region 38 First opening 39 Second opening 49 Tightening bolt (fastening member)
C Base axis

Claims (5)

A handle support structure in which a handle bar is supported by a handle holder fitted to a front fork that supports a front wheel,
The handle holder includes a base portion that is elastically deformable by a split groove, a hold portion that holds the handle bar, and a plurality of arm portions that connect the hold portion to the base portion,
The plurality of arm portions are spaced apart in the circumferential direction of the base portion,
The base part is elastically deformed by the fastening force of the fastening member and fastened to the outer peripheral part of the front fork.
Each of the arm portions is a vehicle handle support structure that is connected to the base portion in a second region excluding the first region opposite to the split groove with respect to the axial center position of the base portion . 2. The vehicle handle support structure according to claim 1, wherein the arm portion is formed so that a thickness of a portion on the split groove side and the first region side is thinner than that of a central portion. The vehicle handle support structure according to claim 1 , wherein the split groove is disposed on one side portion of the base portion, and the hold portion is disposed eccentrically from the base portion to the other side. In Claim 3 , The said two arm parts are provided, The said 2 arm parts and the said base part are the 1st opening near the axial center of the base part, and the 2nd which was separated from the axial center. A vehicle steering wheel support structure in which the first opening is larger than the second opening. 5. The handle holder according to claim 1, wherein the handle holder has a fitting hole into which an upper end portion of the front fork is fitted,
The two arm portions are provided, and the two arm portions and the base portion form a first opening near the axis of the base portion and a second opening away from the axis. And
The first opening is located above the fitting hole,
A steering wheel support structure for a vehicle that is open in an inclined direction from the shaft center toward a position above the split groove.

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