JP2016132303A - Front suspension of saddle-riding type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make assembling and de-assembling of a cushion easier, and facilitate reduction in weight, for reducing a cost by decreasing the number of components, relating to a front suspension of a saddle-riding type vehicle in which a fixing part having a pair of left and right fixing arms extending vertically is fixed to a lower end part of a steering system in which a steering handle is provided at an upper end part, a rear end part of a pair of left and right swing arms for pivoting an axle of a front wheel at a front end part is attached for free swinging, and a buffer mechanism is provided between the pair of swing arms and the fixing part.SOLUTION: A buffer mechanism 19 includes a balance arm 34 which is pivoted on a fixing part 16 for swinging, a connection member 35 which connects between one of a pair of left and right swing arms 18 and one end part of the balance arm 34, and a cushion 36 which connects between the other of the pair of left and right swing arms 18 and the other end part of the balance arm 34.SELECTED DRAWING: Figure 2

Description

  In the present invention, a fixed portion having a pair of left and right fixed arms extending in the vertical direction is fixed to a lower end portion of a steering stem provided with a steering handle at an upper end portion, and a pair of left and right shafts that support a front wheel axle at a front end portion. The present invention relates to a front suspension of a saddle-ride type vehicle in which a rear end portion of a swing arm is swingably attached to a lower end portion of the fixed arm, and a buffer mechanism is provided between the pair of swing arms and the fixed portion.

  Patent Document 1 discloses a front suspension for a motorcycle in which cushions are provided between a pair of left and right fixed arms and a pair of left and right swing arms.

JP 59-34989 A

  The one disclosed in Patent Document 1 requires a pair of left and right cushions, and it is desired to reduce costs by reducing the number of parts.

  The present invention has been made in view of such circumstances, and is a saddle-ride type vehicle in which the assembly and disassembly of the cushion is facilitated and the weight can be reduced, and the cost is reduced by reducing the number of parts. The object is to provide a front suspension.

  In order to achieve the above object, according to the present invention, a fixed portion having a pair of left and right fixed arms extending in the vertical direction is fixed to a lower end portion of a steering stem provided with a steering handle at an upper end portion. A saddle riding type in which rear end portions of a pair of left and right swing arms pivotally supported by a portion are swingably attached to a lower end portion of the fixed arm, and a buffer mechanism is provided between the pair of swing arms and the fixed portion In the front suspension of the vehicle, the buffer mechanism includes a balance arm that is pivotally supported by the fixed portion, and a connecting member that connects one of the pair of left and right swing arms and one end of the balance arm. A first feature is that a cushion for connecting the other of the pair of left and right swing arms and the other end of the balance arm is provided.

  Further, according to the present invention, in addition to the configuration of the first feature, the fixed portion includes a pair of left and right fixed arms and a connecting portion that connects between upper ends of the fixed arms, and the balance arm is connected to the connecting arm. The second feature is that the shaft is pivotally supported by the portion.

  Furthermore, in addition to the configuration of the first or second feature, the third feature of the present invention is that the cushion is disposed so as to extend in parallel with the fixed arm.

  According to the first feature of the present invention, the buffer mechanism is configured to include a balance arm, a connecting member, and one cushion. When the force acting on the front wheel from the road surface increases, On the one hand, the connecting member connected to one swing arm swings the balance arm in the direction of compressing the cushion, and on the left and right other side of the front wheel, the other swing arm swings so as to compress the cushion. Therefore, the force acting on the steering stem can be buffered. In addition, since the connecting member and the cushion are arranged outside the fixed arm, it is possible to reduce the diameter of the fixed arm and reduce the weight, and the cushion can be easily assembled and disassembled. Can be reduced to reduce costs.

  Further, according to the second feature of the present invention, the balance arm is pivotally supported by the connecting portion constituting a part of the fixed portion so as to connect the upper ends of the pair of left and right fixed arms. It is easy to ensure the rigidity of the support portion that supports the balance arm so as to be swingable.

  Further, according to the third feature of the present invention, by arranging the cushion in parallel with the fixed arm, the distance between the balance arm and the fixed portion in the vehicle front-rear direction is set small, and the front suspension is made compact. Can do.

1 is a left side view of a motorcycle. It is a perspective view of a front suspension. It is a disassembled perspective view of a front suspension. FIG. 4 is a view taken in the direction of arrow 4 in FIG. 2. FIG. 5 is a view taken in the direction of arrow 5 in FIG.

  Embodiments of the present invention will be described with reference to FIGS. 1 to 5 attached hereto. In the following description, front and rear, left and right, and top and bottom refer to directions as viewed from a rider riding a motorcycle.

  First, in FIG. 1, a steering stem 14 provided with a steering handle 13 at an upper end portion is supported so as to be steerable by a head pipe 11 that is provided at a front end of a body frame F of a scooter type motorcycle that is a saddle-ride type vehicle. The

  2 to 5 together, a fixed portion 16 having a pair of left and right fixed arms 15 extending in the vertical direction is fixed to the lower end portion of the steering stem 14, and the axle 17 of the front wheel WF is pivoted at the front end portion. The rear ends of the pair of left and right swing arms 18 that are supported are swingably attached to the lower end of the fixed arm 15, and a buffer mechanism 19 is provided between the pair of swing arms 18 and the fixed portion 16.

  The fixed arm 15 is disposed so as to extend in the vertical direction on both the left and right sides of the front wheel WF with a lower end disposed behind the axle 17 of the front wheel WF. The pair of left and right fixed arms 15 and a connecting portion 20 that connects the upper ends of the fixed arms 15 are connected to the pair of left and right fixed arms 15 integrally. The curved portion 21 is formed of a substantially U-shaped curved portion 21 that is formed and opened downward, and a reinforcing plate 22 that is welded to the upper inner surface of the pair of left and right fixed arms 15 and the lower surface of the curved portion 21. Is fixed to the lower end of the steering stem 14.

  A cylindrical front bearing holder 24 is provided at the front end of the swing arm 18 extending in the front-rear direction. The front bearing holding portion 24 supports the axle 17 via a first bearing 25. To do. A first bracket 26 having a substantially U-shaped cross-sectional shape opened downward is fixed to the lower end of the fixed arm 15 by welding or the like. On the other hand, a cylindrical rear bearing holding portion 27 is provided at the rear end portion of the swing arm 18, and the rear bearing holding portion 27 is inserted into the first bracket 26 and the nut 28 is screwed. It is attached to the bolt 29 to be swingable through the second bearing 30.

  A cylindrical intermediate bearing holding portion 31 is provided in the middle portion of the swing arm 18 in the front-rear direction, and a third bearing 32 is held by the intermediate bearing holding portion 31.

  The buffer mechanism 19 is a connecting member that connects the balance arm 34 pivotally supported by the fixed portion 16, one of the pair of left and right swing arms 18, and one end of the balance arm 34. A connecting rod 35 and a cushion 36 for connecting the other of the pair of left and right swing arms 18 and the other end of the balance arm 34 are provided.

  The balance arm 34 is disposed in front of the connecting portion 20 in the fixed portion 16 so as to extend in the left-right direction, and the central portion in the longitudinal direction of the balance arm 34 is the reinforcement of the connecting portion 20. A support boss portion 37 is inserted integrally with a base end portion of the plate 22 to allow the support bolt 38 extending forward to pass therethrough. The support boss portion 37 of the support bolt 38 protrudes forward from the support boss portion 37. A nut 39 sandwiching the washer 40 is screwed between the boss portion 37 and the boss portion 37. Thus, the balance arm 34 is supported by the connecting portion 20 of the fixed portion 16 so as to be able to swing left and right around the axis of the support bolt 38.

  The connecting rod 35 connects the right end portion of the balance arm 34 and the middle portion in the longitudinal direction of the right swing arm 18 of the pair of left and right swing arms 18. A cylindrical connecting rod bearing holding portion 41 is provided at the upper end portion of the connecting rod 35, and the connecting rod bearing holding portion 41 is attached to a bolt 43 fastened to the right end portion of the balance arm 34. The fourth bearing 42 is pivotably connected. The lower end portion of the connecting rod 35 is provided with a substantially U-shaped second bracket 44 that opens downward, and the intermediate bearing holding portion 31 of the right swing arm 18 is connected to the second bracket 44. And a bolt 46 to which a nut 45 is screwed.

  The cushion 36 connects the left end portion of the balance arm 34 and the middle portion in the longitudinal direction of the left swing arm 18 of the pair of left and right swing arms 18, and is parallel to the fixed arm 15. It extends in front of the left fixed arm 15 so as to extend. A cylindrical cushion bearing holding portion 47 is provided at the upper end portion of the cushion 36, and this cushion bearing holding portion 47 is attached to a bolt 49 fastened to the left end portion of the balance arm 34 with a fifth bearing. It is slidably connected via 48. Further, a substantially U-shaped third bracket 50 opened downward is provided at the lower end of the cushion 36, and the intermediate bearing holding portion 31 of the left swing arm 18 is attached to the third bracket 50. A bolt 52 to be inserted and screwed into the nut 51 is pivotally connected via a third bearing 32.

  Next, the operation of this embodiment will be described. A pair of left and right swing arms whose rear end is swingably attached to the lower end of the fixed arm 15 so as to pivotally support the axle 17 of the front wheel WF at the front end. 18, a buffer mechanism 19 provided between a fixed portion 16 having a pair of left and right fixed arms 15, a balance arm 34 pivotally supported by the fixed portion 16 and a pair of left and right swings Since it includes a connecting rod 35 that connects one end of the arm 18 and one end of the balance arm 34, and a cushion 36 that connects the other of the pair of left and right swing arms 18 and the other end of the balance arm 34. When the force acting on the front wheel WF from the road surface increases, the balance arm 3 in the direction in which the connecting rod 35 connected to one swinging arm 18 compresses the cushion 36 on the left or right side of the front wheel WF. The rocked, the other of the left and right front wheels WF can buffer the force acting from the front wheel WF to the steering stem 14 by the other swing arm 18 is swung so as to compress the cushion 36. In addition, the connecting rod 35 and the cushion 36 are disposed outside the fixed arm 15, so that the fixed arm 15 can be reduced in diameter to reduce the weight, and the cushion 36 can be easily assembled and disassembled. Therefore, the number of parts can be reduced and the cost can be reduced.

  The fixed portion 16 includes a pair of left and right fixed arms 15 and a connecting portion 20 that connects the upper ends of the fixed arms 15. The balance arm 34 is pivotally supported by the connecting portion 20 so as to be swingable. Therefore, it is easy to ensure the rigidity of the support portion that supports the balance arm 34 so as to be swingable.

  Further, since the cushion 36 is arranged so as to extend in parallel with the fixed arm 15, the distance between the balance arm 34 and the fixed portion 16 in the vehicle front-rear direction can be set small, and the front suspension can be made compact.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

  For example, in the above-described embodiment, the case where the present invention is applied to a motorcycle has been described. However, the present invention can be widely applied to a saddle-ride type vehicle including a motor tricycle.

13 ... Steering handle 14 ... Steering stem 15 ... Fixed arm 16 ... Fixed portion 17 ... Axle 18 ... Swing arm 19 ... Buffer mechanism 20 ... Connecting portion 34 ... Balance arm 35 ... Connecting rod 36 as connecting member ... Cushion WF ... Front wheel

Claims (3)

  A fixed portion (16) having a pair of left and right fixed arms (15) extending in the vertical direction is fixed to the lower end portion of the steering stem (14) provided with the steering handle (13) at the upper end portion, and the front wheel (WF) The rear ends of the pair of left and right swing arms (18) that pivotally support the axle (17) at the front end portion are swingably attached to the lower end of the fixed arm (15), and the pair of swing arms (18 ) And the fixed portion (16), a shock absorbing mechanism (19) is provided between the front suspension of the saddle-ride type vehicle. The shock absorbing mechanism (19) is pivotally supported by the fixed portion (16) in a swingable manner. A balance arm (34), a connecting member (35) for connecting one of the pair of left and right swing arms (18) and one end of the balance arm (34), and a pair of left and right swing arms (18) And the balance Saddle type front suspension of the vehicle, characterized in that it comprises a cushion (36) for connecting the other end portion of the over arm (34).   The fixed portion (16) includes a pair of left and right fixed arms (15) and a connecting portion (20) for connecting the upper ends of the fixed arms (15), and the balance arm (34) is connected to the connecting arm (34). The front suspension of a saddle-ride type vehicle according to claim 1, wherein the front suspension is pivotably supported by the portion (20).   The front suspension of a saddle-ride type vehicle according to claim 1 or 2, wherein the cushion (36) is arranged so as to extend in parallel with the fixed arm (15).

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