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JP-2026074738-A - Saddle-riding vehicles

JP2026074738AJP 2026074738 AJP2026074738 AJP 2026074738AJP-2026074738-A

Abstract

[Problem] To provide a saddle-type vehicle that ensures the strength of the rear suspension mounting portion with a simple structure. [Solution] The saddle vehicle comprises a pair of upper frames extending in the front-rear direction, a pair of pivot frames connected to the rear ends of the pair of upper frames and extending downward, a cross frame extending in the left-right direction and connecting the pair of upper frames or the pair of pivot frames to each other, a swing arm pivotably connected to the pair of pivot frames and supporting the rear wheel of the saddle vehicle, a bracket extending downward from the cross frame, and a rear suspension pivotably connected to the bracket at its upper end and pivotably connected to the swing arm at its lower end. In a side view of the saddle vehicle, a first line extending from the pivot axis at the upper end of the rear suspension to the pivot axis at the lower end of the rear suspension passes through the cross frame. [Selection Diagram] Figure 2

Inventors

  • 山本 智
  • 高橋 藤也

Assignees

  • カワサキモータース株式会社

Dates

Publication Date
20260507
Application Date
20241021

Claims (9)

  1. It is a saddle-type vehicle, A pair of upper frames extending in the front-rear direction of the aforementioned saddle vehicle, A pair of pivot frames connected to the rear ends of the pair of upper frames and extending downwards of the saddled vehicle, A cross frame extending in the left-right direction of the saddle vehicle and connecting the pair of upper frames or the pair of pivot frames to each other, A swing arm that is pivotably connected to the pair of pivot frames and supports the rear wheel of the saddled vehicle, A bracket extending downward from the aforementioned cross frame, The system includes a rear suspension that is pivotably connected to the bracket at its upper end and pivotably connected to the swing arm at its lower end, In a side view of the aforementioned saddle vehicle, the first line extending from the pivot axis at the upper end of the rear suspension to the pivot axis at the lower end of the rear suspension passes through the cross frame of the saddle vehicle.
  2. The saddle vehicle according to claim 1, wherein, when the saddle vehicle is stationary on the ground, in a side view of the saddle vehicle, the axis of the cross frame, the pivot axis of the upper end of the rear suspension, and the pivot axis of the lower end of the rear suspension are aligned in a straight line.
  3. The saddle vehicle according to claim 1, wherein, when the rear suspension extends and retracts, in a side view of the saddle vehicle, the angle between the second line extending from the axis of the cross frame to the pivot axis at the upper end of the rear suspension and the first line is 20° or less.
  4. The rear suspension includes a cylindrical case, a piston rod partially housed within the case and extending and retracting from the case by sliding against the case, a first mount at the end of the piston rod, and a second mount at the end of the case. The direction of extension and retraction of the piston rod is along the direction from the first mount toward the second mount, The saddle vehicle according to claim 1, wherein one of the first mount and the second mount is pivotably connected to the bracket, and the other is pivotably connected to the swing arm.
  5. A seat frame that supports the seat on which the driver sits, comprising a seat frame that extends in the front-rear direction of the saddle vehicle and is connected to the pair of upper frames, The saddle vehicle according to claim 1, wherein the cross frame is located at the connection portion between the pair of upper frames and the seat frame.
  6. The lower end of the rear suspension extends to a position lower than the swingarm, The saddle vehicle according to claim 1, wherein the saddle vehicle is provided with a link structure that connects the lower end of the rear suspension to the swing arm.
  7. The aforementioned link structure is A first link is pivotably connected to the pivot frame and the lower end of the rear suspension, The saddle vehicle according to claim 6, further comprising a second link pivotably connected to the first link and the swing arm.
  8. The system further comprises a pair of lower frames, each of the pair of pivot frames, projecting toward each other in the left-right direction of the saddled vehicle and arranged with a gap between them in the left-right direction. The saddle vehicle according to claim 7, wherein the first link is located between the pair of lower frames and is pivotably connected to the pair of lower frames.
  9. The pair of lower frames are tubular, The first link includes a tubular section sandwiched between the opposing ends of the pair of lower frames, The aforementioned saddle-type vehicle is, A bolt extends through the pipe section and the pair of lower frames in the left-right direction of the saddled vehicle, and pivotably connects the first link to the pair of lower frames, The saddle vehicle according to claim 8, further comprising nuts that are fastened to the bolts from the outside of the pair of lower frames in the left-right direction of the saddle vehicle.

Description

This disclosure relates to a saddle-type vehicle. The saddle-type vehicle disclosed in Patent Document 1 includes a cross member connecting the left and right pivot frames that pivotably support the swingarm, and the upper support portion of the rear suspension is provided at the tip of a bracket extending forward and downward from the cross member. Patent No. 6008920 Figure 1 is a side view showing an example of the configuration of a saddle-type vehicle according to an exemplary embodiment.Figure 2 is a left side view of the motorcycle body frame shown in Figure 1.Figure 3 is a right side view of the motorcycle body frame shown in Figure 1.Figure 4 is a plan view of the motorcycle frame shown in Figure 1, viewed from above.Figure 5 is a perspective view of the motorcycle frame shown in Figure 1, viewed from the front at an oblique angle.Figure 6 is a perspective view of the motorcycle frame shown in Figure 1, viewed from diagonally below.Figure 7 is a left side view showing an enlarged view of the rear suspension and its surrounding area in the vehicle frame of Figure 2.Figure 8 is a plan view of the motorcycle body frame shown in Figure 1, viewed from below.Figure 9 is a left side view showing the rear suspension and its surrounding components in the same manner as in Figure 7. Illustrative embodiments of this disclosure are described below with reference to the drawings. The embodiments described below are either comprehensive or specific examples. Components in the following embodiments that are not described in the independent claim representing the highest-level concept are described as optional components. The figures in the accompanying drawings are schematic and not necessarily strictly illustrative. In each figure, substantially identical components are denoted by the same reference numerals, and redundant descriptions may be omitted or simplified. In the following embodiments, the saddle vehicle is described as a motorcycle, but it may also be a motorcycle tricycle or a buggy. A saddle-riding vehicle 1 according to an exemplary embodiment will be described. Figure 1 is a side view showing an example of the configuration of the saddle-riding vehicle 1 according to an exemplary embodiment. As shown in Figure 1, the saddle-riding vehicle 1 according to this embodiment is a motorcycle. Hereafter, "saddle-riding vehicle 1" may be referred to as "motorcycle 1". The motorcycle 1 comprises a front wheel 2, a rear wheel 3, a body frame 4, a seat frame 5, a front suspension 6 supporting the front wheel 2, and a rear suspension 7 supporting the rear wheel 3. In this embodiment, the motorcycle 1 integrally includes the body frame 4 and the seat frame 5, and the seat frame 5 is welded to the body frame 4. Figures 2 and 3 are left and right side views, respectively, of the body frame 4 of the motorcycle 1 shown in Figure 1. As shown in Figures 2 and 3, the body frame 4 includes, as frame elements, a head pipe 4a, a pair of upper main frames 4bL and 4bR, a pair of lower main frames 4cL and 4cR, a pair of down frames 4dL and 4dR, a pair of lower frames 4eL and 4eR, a pair of pivot frames 4fL and 4fR, a plurality of bridge frames 4g, and a cross frame 4h. In the body frame 4, at least some of the frame elements are joined to each other by welding. Here, in this specification and claims, the upward, downward, forward, backward, left, and right directions are directions relative to the motorcycle 1 positioned upright on a horizontally extending ground. The upward direction refers to the direction from the ground toward the motorcycle 1, and the downward direction refers to the direction from the motorcycle 1 toward the ground. The forward direction refers to the direction of movement of the motorcycle 1. The backward, left, and right directions indicate the corresponding directions relative to the driver straddling the motorcycle 1 in its upright position on the ground. The head pipe 4a is a cylindrical body with an axis in the vertical direction. The steering shaft 11 of the motorcycle 1 is rotatably inserted through the head pipe 4a. Figure 4 is a plan view of the motorcycle frame 4 of Figure 1, viewed from above. As shown in Figure 4, the upper main frames 4bL and 4bR are positioned opposite each other in the left-right direction. The upper main frame 4bL is positioned to the left of line L, which extends in the front-rear direction of the motorcycle 1 through the head pipe 4a, and the upper main frame 4bR is positioned to the right of line L. In this embodiment, line L passes through the center of the motorcycle 1 in the left-right direction. The upper main frames 4bL and 4bR extend downward and backward from the top of the head pipe 4a, inclined in the rearward direction. As the upper main frames 4bL and 4bR move away from the head pipe 4a, they extend backward, moving away from each other in the left-right direction, and then curve toward each other in the left-right direction and extend backward. The rear e