JP2006088936A - Gear ratio switching device and saddle-riding type vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gear ratio switching device and a saddle-riding type vehicle capable of preventing a gear ratio switching part from being driven by pivoting of a power unit by providing the power unit on a vehicle body frame of the saddle-riding type vehicle in which the power unit is pivoted with a rear wheel suspension device. <P>SOLUTION: The gear ratio switching device 400 switches a gear ratio for changing the rotation speed of an engine mounted to a saddle-riding type vehicle pivotably in an approximately vertical direction making a rear wheel pivot unit 60 as a center with the rear wheel suspension device by driving a gear ratio switching part. The gear ratio switching device 400 is provided with a switch pedal 410 provided on a vehicle body frame and receiving switch operation of the gear ratio; and a switch shaft arm 420 and a switch link 430 connected to the switch pedal 410 and transmitting the switch operation to a switch shaft 46. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gear ratio switching device for a straddle-type vehicle, and in particular, a power unit that is attached to a straddle-type vehicle so as to swing substantially vertically with a rear wheel suspension device that suspends a rear wheel of the straddle-type vehicle. The present invention relates to a gear ratio switching device that switches a gear ratio of the rotational speed of the vehicle and a straddle-type vehicle including the gear ratio switching device.

  Conventionally, in a saddle riding type vehicle such as a motorcycle in which a driver straddles a heel and has 2 to 4 wheels, a gear ratio switching unit (transmission gear) that changes the rotational speed of a power unit such as an engine is operated. 2. Description of the Related Art Gear ratio switching devices that are operated with a person's foot are widely used.

Such a gear ratio switching device generally employs a structure in which a change pedal operated by a driver's foot and a switching shaft (shift drum) of a transmission gear are connected by a switching link (for example, a patent Reference 1).
JP-A-61-232975 (page 2-3, FIG. 2-3)

  By the way, in a straddle-type vehicle equipped with a gear ratio switching device as described above, it has been studied to swing a power unit such as an engine in a substantially vertical direction together with a rear wheel suspension device for suspending a rear wheel.

  However, since the support shaft that rotatably supports the change pedal of the gear ratio switching device is generally provided in the vehicle body frame, when the power unit swings together with the rear wheel suspension device, the support shaft and the gear ratio There is a problem that the positional relationship of the switching unit with the switching shaft changes, and the gear ratio switching unit may be driven without the intention of the driver of the saddle riding type vehicle.

  Therefore, the present invention has been made in view of such a situation, and the power unit is provided in a vehicle body frame of a straddle-type vehicle that swings together with the rear wheel suspension device. An object of the present invention is to provide a gear ratio switching device and a straddle-type vehicle that can prevent the vehicle from being driven.

  In order to solve the problems described above, the present invention has the following features. First, a first feature of the present invention is that a power unit (engine 40) attached to a straddle-type vehicle (motorcycle 10) so as to be able to swing substantially vertically along with a rear wheel suspension device (rear wheel suspension device 70). A gear ratio switching device (speed ratio switching device 400) for switching a gear ratio for shifting the rotational speed of the saddle type vehicle by driving a gear ratio switching unit (speed ratio switching unit 41a). A switching pedal (for example, a switching pedal 410) provided on the (body frame 50) that receives the gear ratio switching operation, and a switching operation transmission that is connected to the switching pedal and transmits the switching operation to the gear ratio switching unit. The gist is to include a mechanism (for example, a switching shaft arm 420 and a switching link 430).

According to a second aspect of the present invention, in accordance with the first aspect of the present invention, the switching pedal is rotatably supported by a support shaft (change pedal support shaft 47) having an axis along the vehicle width direction. A supported portion (boss portion 410b), a pedal portion (pedal portion 410a) that extends from the supported portion and receives a switching operation of the transmission gear, and a pedal arm that extends from the supported portion in the radial direction of the support shaft Part (pedal arm part 410c), the gear ratio switching part has a switching shaft along the vehicle width direction, and the switching operation transmission mechanism has an axis along the vehicle width direction. A switching shaft arm portion (switching shaft arm 420) that extends in the radial direction of the shaft and is fixed to the switching shaft, and a connecting portion (switching link 430) that connects the switching shaft arm portion and the pedal arm portion. The switching shaft arm part and the connecting part Play connection portion (connection portion L _1), and the connecting portion between the connecting portion and the pedal arm portion (connecting portion L ₂₎ is to prevent the transmission ratio switching unit by the swinging of the power unit drives It is summarized as having.

  That is, the connecting portion between the switching shaft arm portion and the connecting portion, and the connecting portion between the pedal arm portion and the connecting portion are configured to have a play that prevents the speed ratio switching portion from being driven by the swing of the power unit. ing. The supported portion is rotatably supported by a support shaft provided on the vehicle body frame.

  For this reason, even if the power unit swings, the switching shaft (switching shaft arm portion) is not rotated, and the gear ratio switching portion is driven regardless of the intention of the driver of the saddle riding type vehicle. It is prevented.

  A third feature of the present invention relates to the first feature of the present invention, wherein the switching pedal is rotatably supported by a support shaft (change pedal support shaft 47) along the vehicle width direction. (Boss portion 410b), a pedal portion (pedal portion 410a) that extends from the supported portion and receives the switching operation, and a pedal arm portion (pedal arm portion 410c) that extends from the supported portion in the radial direction of the support shaft. The gear ratio switching unit has a switching shaft (switching shaft 46) along the vehicle width direction, and the switching operation transmission mechanism extends in the radial direction of the switching shaft and is fixed to the switching shaft. A switching shaft arm portion (switching shaft arm portion 420A), a detection switch (detection switch 450) for detecting the switching operation based on the movement of the pedal arm portion, and the switching so as to be substantially orthogonal to the switching shaft. Connected with shaft arm , And summarized in that an actuator (actuator 460) for driving the transmission gear ratio switching portion in accordance with a signal corresponding to the switching operation output by the detection switch.

  A fourth feature of the present invention relates to the first feature of the present invention, in which the switching pedal is rotatably supported by a support shaft (change pedal support shaft 47) along the vehicle width direction. (Boss portion 410b), a pedal portion (pedal portion 410a) that extends from the supported portion and receives the switching operation, and a pedal arm portion (pedal arm portion 410c) that extends from the supported portion in the radial direction of the support shaft. The gear ratio switching unit has a switching shaft (switching shaft 46) along the vehicle width direction, and the switching operation transmission mechanism extends in the radial direction of the switching shaft and is fixed to the switching shaft. A switching shaft arm portion (switching shaft arm portion 420B) that is attached to the vehicle body frame in front of the switching shaft, and a rotation shaft (rotation shaft 433a) along the vehicle width direction. First connecting portion extending in the first radial direction (Connecting portion 433b), a joint portion (joint portion 433) having a second connecting portion (connecting portion 433c) extending in a second radial direction different from the first radial direction, the pedal arm portion and the first A first connecting portion (link member 432) for connecting one connecting portion; and a second connecting portion (link member 434) for connecting the switching shaft arm portion and the second connecting portion, and the switching pedal. Further, the gist of the invention is that the switching operation transmission mechanism has a play that prevents the gear ratio switching unit from being driven by swinging of the power unit.

  A fifth feature of the present invention relates to the first feature of the present invention, in which the switching pedal is rotatably supported by a support shaft (change pedal support shaft 47) along the vehicle width direction. (Boss portion 410b), a pedal portion (pedal portion 410a) that extends from the supported portion and receives the switching operation, and a pedal arm portion (pedal arm portion 410c) that extends from the supported portion in the radial direction of the support shaft. The gear ratio switching unit has a switching shaft (switching shaft 46) along the vehicle width direction, and the switching operation transmission mechanism extends in the radial direction of the switching shaft and is fixed to the switching shaft. A switching shaft arm portion (switching shaft arm portion 420C), a wire cable (wire cable 471) having a wire (wire 471a) and an outer sheath (outer sheath 471b) slidably covering the wire, and sandwiching the outer sheath One to do Other has a plurality of clamping portion (pinching portion 470, 472), the wire cable, and summarized in that is coupled to said said switching shaft arm pedal arm portion.

  A sixth feature of the present invention is summarized in that it is a straddle-type vehicle (motorcycle 10) including any one of the gear ratio switching devices according to the first to fifth features of the present invention.

  According to the feature of the present invention, the power unit is provided on the body frame of the saddle riding type vehicle that swings together with the rear wheel suspension device, and the gear ratio switching unit is prevented from being driven by the swinging of the power unit. A gear ratio switching device and a straddle-type vehicle that can be provided can be provided.

(Configuration of transmission ratio switching device according to this embodiment)
Next, an example of an embodiment of a gear ratio switching device according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(1) Schematic Configuration of Motorcycle with Gear Ratio Switching Device FIG. 1 is a left side view showing a schematic configuration of a motorcycle 10 that is a straddle-type vehicle provided with a gear ratio switching device according to the present embodiment. As shown in FIG. 1, the motorcycle 10 includes a body frame 50 that forms a skeleton of the motorcycle 10, and various components are mounted on the body frame 50.

  The vehicle body frame 50 includes a head pipe 51, a down tube 52, an upper rail 53, a lower rail 54, and a rear rail 55. The vehicle body frame 50 further includes other rails (not shown) (for example, rails connecting the upper rail 53 and the rear rail 55).

  The head pipe 51 supports the front fork 21 (steering shaft). Specifically, the front fork 21 is supported by the head pipe 51 so as to be able to turn left and right in the traveling direction. The front fork 21 supports the front wheel 22 in a rotatable manner, and moves the front wheel 22 in a vertical direction (in practice, a direction in which a predetermined caster angle is given) according to a change in road surface condition (linear motion). ) To absorb the impact received by the front wheel 22.

  The down tube 52 extends downward from the head pipe 51 and has a cylindrical or rectangular tube shape. The down tube 52 is provided with a rear wheel pivot unit 60.

  The lower rail 54 extends toward the rear of the motorcycle 10 from the lower end of the down tube 52, and extends from the head pipe 51 via a space provided inside the fuel tank 30 behind the engine 40. It is joined to the upper rail 53.

  The rear wheel pivot unit 60 is disposed in front of the engine 40 (power unit) in the traveling direction, and a rear wheel suspension device 70 is connected to the rear wheel pivot unit 60.

  The rear wheel suspension device 70 pivotally supports the rear wheel 71 so as to be swingable in a substantially vertical direction around the rear wheel pivot unit 60. In the present embodiment, the rear wheel suspension device 70 includes a connecting member 710, an arm member 720, and a rear cushion unit 730.

  The connecting member 710 is connected to the rear wheel pivot unit 60. The arm member 720 has one end in the longitudinal direction connected to the connecting member 710 at the rear of the connecting member 710, and the other end rotatably supporting the rear wheel 71.

  The rear cushion unit 730 supports the connecting member 710 and the arm member 720 that swing about the rear wheel pivot unit 60 at predetermined positions, and also supports the rear wheel 71 that is rotatably supported by the arm member 720 in the vertical direction. Is moved (circular movement) to absorb the impact received by the rear wheel 71.

  The engine 40 is attached to the rear wheel suspension device 70, specifically, the connecting member 710. That is, the engine 40 can swing together with the connecting member 710 around the rear wheel pivot unit 60.

  Further, on the left side surface of the motorcycle 10, a gear ratio switching unit 41a (not shown in FIG. 1, see FIG. 2) provided inside the engine 40 (specifically, the crankcase 41, see FIG. 2) is provided. A gear ratio switching device 400 to be driven is attached.

(2) Configuration of Rear Wheel Pivot Unit and Rear Wheel Suspension Device Next, specific configurations of the rear wheel pivot unit 60 and the rear wheel suspension device 70 shown in FIG. 1 will be described.

  FIG. 2 is a diagram showing a part of the left side surface of the motorcycle 10 including the rear wheel pivot unit 60 and the rear wheel suspension device 70.

  As shown in the figure, the rear wheel pivot unit 60 is attached to a down tube 52 and is constituted by a rubber bush 61, a pivot bolt 62 and a pivot nut 63.

  The rubber bush 61 is made of an elastic member having a predetermined hardness. The pivot bolt 62 supports the connecting member 710 so as to be swingable in a substantially vertical direction, and is inserted into a circular hole provided in the rubber bush 61. One end of the pivot bolt 62 is screwed into the pivot nut 63.

  As described above, the engine 40 is swingably attached to the rear wheel suspension device 70, specifically, the connecting member 710. More specifically, the crankcase 41 is fixed to the connecting member 710. Further, an arm member 720 is attached to the rear portion of the crankcase 41 using an arm connecting bolt 724.

  The arm member 720 rotatably supports the rear wheel 71 and is fixed to the connecting member 710 using a fixing bolt 725.

  The power of the engine 40 is transmitted from the drive sprocket 42 to the driven sprocket 43 through the drive chain 44, and the rear wheel 71 is rotated together with the driven sprocket 43.

  Furthermore, as described above, the crankcase 41 is provided with a speed ratio switching unit 41a having a plurality of (for example, 6th speed) speed change gears (not shown). ), A switching shaft 46 that drives the gear ratio switching unit 41 a is provided on the side surface of the crankcase 41.

(3) Configuration of Gear Ratio Switching Device Next, the configuration of the gear ratio switching device 400 that is a main part of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 is a partial schematic perspective view of the motorcycle 10 including the gear ratio switching device 400, and FIG. 4 is a side view of the gear ratio switching device 400.

  As described above, the gear ratio switching device 400 switches the gear ratio for shifting the rotational speed of the engine 40 attached to the motorcycle 10 so as to be able to swing substantially vertically with the rear wheel suspension device 70.

  The gear ratio switching device 400 includes a switching pedal 410, a switching shaft arm 420, and a switching link 430.

  The switching pedal 410 is provided on the vehicle body frame 50 of the motorcycle 10 and receives a gear ratio switching operation by a foot of a driver (rider) of the motorcycle 10.

  Specifically, the switching pedal 410 includes a pedal portion 410a, a boss portion 410b, and a pedal arm portion 410c.

  The pedal portion 410a extends from the boss portion 410b and receives a gear ratio switching operation by the operator's foot. Specifically, the pedal portion 410a can rotate clockwise (upward) and counterclockwise (downward) about the boss portion 410b.

  When an operation for rotating the pedal portion 410a by a predetermined distance is performed by the operator's foot, the content of the operation is transmitted to the switching link 430 to the switching shaft arm 420, and the switching shaft 46 is rotated.

  When the switching shaft 46 is rotated, the gear ratio switching unit 41a is driven. Note that switching to a high-speed gear (shift-up) or switching to a low-speed gear (shift-down) is performed depending on the rotation direction of the switching shaft 46.

  Further, the rotation of the engine 40 whose rotational speed is changed is transmitted to the rear wheel 71 via the drive sprocket 42 and the drive chain 44.

  The boss portion 410b is rotatably supported by a change pedal support shaft 47 along the vehicle width direction of the motorcycle 10, and constitutes a supported portion in this embodiment.

  Specifically, the diameter of the boss portion 410b is slightly larger than the diameter of the change pedal support shaft 47, and the boss portion 410b is rotatably supported by the change pedal support shaft 47 via a bearing (not shown). . The change pedal support shaft 47 projects from a bracket 55 a attached to the rear rail 55.

  The pedal arm portion 410 c is joined to the boss portion 410 b and extends from the boss portion 410 b in the radial direction of the change pedal support shaft 47.

  The switching shaft arm 420 extends in the radial direction of the switching shaft 46 along the vehicle width direction of the motorcycle 10 and is fixed to the switching shaft 46. Specifically, the switching shaft arm 420 has a circular hole with a notch, and the switching shaft 46 is inserted through the circular hole. In addition, the switching shaft arm 420 is fixed to the switching shaft 46 by a screw (not shown) that tightens the switching shaft 46 inserted through the circular hole.

  The switching link 430 connects the switching shaft arm 420 and the pedal arm portion 410c, and forms a connecting portion in the present embodiment. Specifically, ball joints 430a and 430b are provided at both ends of the switching link 430, and are connected to the switching shaft arm 420 and the pedal arm portion 410c by the ball joints 430a and 430b.

The connecting portion _{L 2} of the connecting portion _{L 1,} and the pedal arm portion 410c and the switch link 430 of the switching shaft arm 420 and the switch link 430, the swing of the engine 40, i.e., a substantially vertical rear wheel suspension device 70 There is play to prevent the gear ratio switching unit 41a from being driven by the swing in the direction.

  In the present embodiment, the switching shaft arm 420 and the switching link 430 are connected to the switching pedal 410 to constitute a switching operation transmission mechanism that transmits a switching operation by the operator's foot to the switching shaft 46.

  The footrest 440 supports the operator's foot, specifically, the heel portion of the left foot. The footrest 440 is attached to a footrest mounting bracket 441 provided at the tip of the change pedal support shaft 47. The driver turns the pedal portion 410a of the switching pedal 410 upward or downward with the left foot supported by the footrest 440, and drives the gear ratio switching portion 41a.

(Action / Effect)
Next, the operation and effect of the gear ratio switching device 400 according to the present embodiment will be described with reference to FIG. The figure shows that even when the engine 40 attached to the rear wheel suspension device 70 swings substantially vertically due to the traveling of the motorcycle 10 or the like, the gear ratio is switched regardless of the intention of the driver (rider). It is explanatory drawing for demonstrating that it is prevented that the part 41a drives.

As shown in the figure, the switching shaft 46 provided in the engine 40 (specifically, the crankcase 41) moves along an arc A centered on the rear wheel pivot unit 60 when the engine 40 swings. To do. For example, the switching shaft 46 and the switching shaft arm 420 fixed to the switching shaft 46 move from the position P ₁ to the position P ₂ to the position P ₃ when the engine 40 swings.

  On the other hand, since the change pedal support shaft 47 is attached to the vehicle body frame 50 (specifically, the bracket 55a), the position of the change pedal support shaft 47 moves even if the engine 40 (switching shaft 46) swings. do not do.

Further, as described above, the connecting portion L ₁ between the switching shaft arm 420 and the switching link 430 and the connecting portion L ₂ (see FIG. 4) between the pedal arm portion 410c and the switching link 430 are caused by the swinging of the engine 40. The gear ratio switching unit 41a is configured to have a play that prevents the gear ratio switching unit 41a from being driven. Specifically, a play that can allow the fluctuation range V of the position of the switching pedal 410 (specifically, the pedal portion 410a) due to the swing of the engine 40 is ensured.

  Furthermore, the switching pedal 410 (boss portion 410b) is rotatably supported by the change pedal support shaft 47.

  That is, even if the engine 40 swings, the switching shaft 46 (switching shaft arm 420) is not rotated, and the gear ratio switching unit 41a is prevented from being driven regardless of the intention of the operator. Is done.

(Other embodiments)
As described above, the content of the present invention has been disclosed through one embodiment of the present invention. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments will be apparent to those skilled in the art.

  For example, the present invention can be modified as follows. 6 to 8 show first to third modified examples of the present invention, respectively. In the following description, differences from the above-described embodiment of the present invention will be mainly described.

(1) First Modification FIG. 6 is a partial schematic perspective view of the motorcycle 10 including a gear ratio switching device 400A according to a first modification of the present invention. As shown in the figure, the gear ratio switching device 400A includes a switching pedal 410 having the same configuration as that of the above-described embodiment of the present invention.

  Further, the gear ratio switching device 400A extends in the radial direction of the switching shaft 46, and based on the movement of the switching shaft arm portion 420A fixed to the switching shaft 46 and the pedal arm portion 410c, the gear ratio by the driver's foot is adjusted. A detection switch 450 that detects the switching operation and a switching shaft arm portion 420A that is substantially orthogonal to the switching shaft 46, and drives the gear ratio switching unit 41a according to a signal corresponding to the switching operation that is output by the detection switch 450. And an actuator 460.

  The detection switch 450 is attached to a bracket 55b provided on the rear rail 55, and the actuator 460 is attached to the engine 40 (specifically, the crankcase 41).

  The detection switch 450 and the actuator 460 are connected using a lead wire (not shown) in order to transmit a signal corresponding to the switching operation output by the detection switch 450. In this modification, the switching shaft arm portion 420A, the detection switch 450, and the actuator 460 constitute a switching operation transmission mechanism.

(2) Second Modification FIG. 7 is a partial schematic perspective view of the motorcycle 10 including the gear ratio switching device 400B according to a second modification of the present invention. As shown in the figure, the gear ratio switching device 400B includes a switching pedal 410 having the same configuration as that of the above-described embodiment of the present invention.

  The gear ratio switching device 400B extends in the radial direction of the switching shaft 46 and is attached to the switching shaft arm portion 420B fixed to the switching shaft 46 and the down tube 52 (vehicle body frame) in front of the switching shaft 46. A connecting portion 433b (first connecting portion) extending in the radial direction of the rotating shaft 433a from the rotating shaft 433a along the vehicle width direction, specifically, upward (first radial direction), and downward (first) And a joint portion 433 having a connecting portion 433c (second connecting portion) extending in the second radial direction).

  Furthermore, the gear ratio switching device 400B includes a link member 432 (first connecting portion) that connects the pedal arm portion 410c and the connecting portion 433b, and a link member 434 (second connecting portion) that connects the switching shaft arm portion 420B and the connecting portion 433c. Part).

  In this modified example, the switching shaft arm portion 420B, the link member 432, the joint portion 433, and the link member 434 constitute a switching operation transmission mechanism.

  In addition, the switching pedal 410 and the switching operation transmission mechanism have a play that prevents the gear ratio switching unit 41a from being driven by the swinging of the engine 40, similarly to the gear ratio switching device 400 according to the embodiment of the present invention described above. have.

  Furthermore, in this modified example, the joint portion 433 is the down tube so that the pivot shaft 433a of the joint portion 433 and the axis of the rear wheel pivot unit 60 (see FIG. 1) are located on substantially the same vertical line. Therefore, the fluctuation range V (see FIG. 4) of the position of the switching pedal 410 due to the swing of the engine 40 can be reduced.

(3) Third Modification FIG. 8 is a partial schematic perspective view of the motorcycle 10 including the gear ratio switching device 400C according to a third modification of the present invention. As shown in the figure, the gear ratio switching device 400C includes a switching pedal 410 ′ having the same configuration as the embodiment of the present invention described above except for a part thereof. The switching pedal 410 ′ has a pedal arm portion 411c having a slightly different shape from the pedal arm portion 410c of the pedal portion 410a according to the embodiment of the present invention described above.

  Further, the gear ratio switching device 400B extends in the radial direction of the switching shaft 46, and is a wire cable having a switching shaft arm portion 420C fixed to the switching shaft 46, and a wire 471a and an outer sheath 471b that slidably covers the wire 471a. 471 and sandwiching portions 470 and 472 that sandwich the exterior 471b. The wire cable 471 is connected to the switching shaft arm part 420C and the pedal arm part 411c.

  The clamping part 470 is attached to a bracket 55b provided on the rear rail 55, and the clamping part 472 is attached to the engine 40 (specifically, the crankcase 41).

  In the present modification example, the switching shaft arm portion 420C, the wire cable 471, and the clamping portions 470 and 472 constitute a switching operation transmission mechanism.

  As mentioned above, although embodiment of this invention and the 1st-3rd modification were demonstrated, this invention is not limited to the motorcycle 10, Other straddle type vehicles (For example, 3 wheels and 4 wheels) Of course, the present invention can also be applied to a straddle-type vehicle having Further, the saddle riding type vehicle includes a scooter type vehicle in which a driver gets on a foot boat with both feet aligned.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

1 is a left side view of a motorcycle according to an embodiment of the present invention. 1 is a partial left side view of a motorcycle including a rear wheel pivot portion and a rear wheel suspension device according to an embodiment of the present invention. 1 is a schematic perspective view of a gear ratio switching device according to an embodiment of the present invention. 1 is a side view of a gear ratio switching device according to an embodiment of the present invention. It is explanatory drawing for demonstrating the effect | action and effect by the gear ratio switching apparatus which concerns on embodiment of this invention. It is a schematic perspective view of the gear ratio switching apparatus according to the first modified example of the present invention. It is a schematic perspective view of the gear ratio switching apparatus according to the second modified example of the present invention. It is a schematic perspective view of the gear ratio switching apparatus according to the third modified example of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 21 ... Front fork, 22 ... Front wheel, 30 ... Fuel tank, 40 ... Engine, 41 ... Crankcase, 41a ... Transmission ratio switching part, 42 ... Drive sprocket, 43 ... Driven sprocket, 44 ... Drive chain, 46 ... changeover shaft, 47 ... change pedal support shaft, 50 ... body frame, 51 ... head pipe, 52 ... down tube, 53 ... upper rail, 54 ... lower rail, 55 ... rear rail, 55a, 55b ... bracket, 60 ... Rear wheel pivot unit, 61 ... rubber bush, 62 ... pivot bolt, 63 ... pivot nut, 70 ... rear wheel suspension, 71 ... rear wheel, 400, 400A to 400C ... gear ratio switching device, 410, 410 '... switching pedal , 410a ... pedal part, 410b ... boss part, 410c, 411c ... pedal arm 420, 420A to 420C ... switching shaft arm, 430 ... switching link, 430a, 430b ... ball joint, 432 ... link member, 433 ... joint, 433a ... rotating shaft, 433b, 433c ... connecting part, 434 ... link member 440 ... footrest, 441 ... footrest mounting bracket, 450 ... detection switch, 460 ... actuator, 470,472 ... clamping part, 471 ... wire cable, 471a ... wire 471b ... exterior, 710 ... connecting member, 720 ... arm member, 724 ... Arm connecting bolt, 725 ... Fixing bolt, 730 ... Rear cushion unit

Claims (6)

A gear ratio switching device for switching a gear ratio for shifting a rotational speed of a power unit attached to a saddle-ride type vehicle so as to be able to swing substantially vertically with a rear wheel suspension device by driving a gear ratio switching unit. ,
A switching pedal that is provided on a body frame of the saddle riding type vehicle and that receives a switching operation of the gear ratio;
A gear ratio switching device, comprising: a switching operation transmission mechanism that is connected to the switching pedal and transmits the switching operation to the gear ratio switching unit. The switching pedal is
A supported part rotatably supported by a support shaft along the vehicle width direction;
A pedal portion extending from the supported portion and receiving the switching operation;
A pedal arm portion extending in a radial direction of the support shaft from the supported portion;
The gear ratio switching unit has a switching shaft along the vehicle width direction,
The switching operation transmission mechanism is
A switching shaft arm portion extending in a radial direction of the switching shaft and fixed to the switching shaft;
A connecting portion for connecting the switching shaft arm portion and the pedal arm portion;
The connecting portion between the switching shaft arm portion and the connecting portion, and the connecting portion between the pedal arm portion and the connecting portion have a play that prevents the gear ratio switching portion from being driven by the swing of the power unit. The gear ratio switching device according to claim 1. The switching pedal is
A supported part rotatably supported by a support shaft along the vehicle width direction;
A pedal portion extending from the supported portion and receiving the switching operation;
A pedal arm portion extending in a radial direction of the support shaft from the supported portion;
The gear ratio switching unit has a switching shaft along the vehicle width direction,
The switching operation transmission mechanism is
A switching shaft arm portion extending in a radial direction of the switching shaft and fixed to the switching shaft;
A detection switch for detecting the switching operation based on the movement of the pedal arm,
An actuator that is connected to the switching shaft arm unit so as to be substantially orthogonal to the switching shaft and drives the speed ratio switching unit according to a signal corresponding to the switching operation output by the detection switch. The gear ratio switching device according to claim 1. The switching pedal is
A supported part rotatably supported by a support shaft along the vehicle width direction;
A pedal portion extending from the supported portion and receiving the switching operation;
A pedal arm portion extending in a radial direction of the support shaft from the supported portion;
The gear ratio switching unit has a switching shaft along the vehicle width direction,
The switching operation transmission mechanism is
A switching shaft arm portion extending in a radial direction of the switching shaft and fixed to the switching shaft;
A first connecting portion that is attached to the body frame in front of the switching shaft and extends in a first radial direction of the rotating shaft from a rotating shaft along a vehicle width direction; and the first radial direction; A joint portion having a second connecting portion extending in a different second radial direction;
A first connecting part for connecting the pedal arm part and the first connecting part;
A second connecting part that connects the switching shaft arm part and the second connecting part;
The gear ratio switching device according to claim 1, wherein the switching pedal and the switching operation transmission mechanism have a play that prevents the gear ratio switching unit from being driven by swinging of the power unit. The switching pedal is
A supported part rotatably supported by a support shaft along the vehicle width direction;
A pedal portion extending from the supported portion and receiving the switching operation;
A pedal arm portion extending in a radial direction of the support shaft from the supported portion;
The gear ratio switching unit has a switching shaft along the vehicle width direction,
The switching operation transmission mechanism is
A switching shaft arm portion extending in a radial direction of the switching shaft and fixed to the switching shaft;
A wire cable having a wire and an exterior covering the wire slidably;
Having one or a plurality of clamping parts for clamping the exterior,
The gear ratio switching device according to claim 1, wherein the wire cable is connected to the switching shaft arm portion and the pedal arm portion. A straddle-type vehicle comprising the gear ratio switching device according to any one of claims 1 to 5.

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