WO2018198827A1

WO2018198827A1 - Front-rear interlocking brake device for saddle type vehicle

Info

Publication number: WO2018198827A1
Application number: PCT/JP2018/015531
Authority: WO
Inventors: 恒盛林; 裕規南中道; 真戸田
Original assignee: 本田技研工業株式会社
Priority date: 2017-04-25
Filing date: 2018-04-13
Publication date: 2018-11-01
Also published as: BR112019021698B1; BR112019021698A2; JP6796196B2; CN110573417B; CN110573417A; JPWO2018198827A1

Abstract

A front-rear interlocking brake device (50) of a saddle type vehicle (1) includes a brake pedal (34) provided on a vehicle body (5) in a pivotable manner; an equalizer arm (52) connected to the brake pedal (34) in a pivotable manner; a rear-wheel-brake transmitting member (33) that is connected to one end (52a) of the equalizer arm (52) and transmits an operating force to the rear-wheel brake (31); a front-wheel-brake transmitting member (54) that is connected to the other end (52b) of the equalizer arm (52) and transmits an operating force to the front-wheel brake (32); and a master cylinder (55) that receives the operating force and causes the front-wheel brake (32) to exert a braking force. The front-wheel-brake transmitting member (54) extends toward the rear side of the equalizer arm (52).

Description

Front-rear interlocking brake system for straddle-type vehicles

The present invention relates to a front / rear interlocking brake device for a saddle-ride type vehicle.
Priority is claimed on Japanese Patent Application No. 20174101580, filed April 25, 2017, the content of which is incorporated herein by reference.

As shown in Patent Document 1, there is a front-rear interlocking brake system for a saddle-ride type vehicle, in which the front wheel brake is interlocked with the rear wheel brake when the brake pedal for the rear wheel brake is mainly operated. In such a front-rear interlocking brake device, the operation force to the brake pedal is distributed to the front wheel brake and the rear wheel brake through the equalizer. The equalizer is connected to the transmission arm of the brake pedal, the rear transmission member transmitting the operation force to the rear wheel brake, and the master cylinder applying the braking force to the front wheel brake.
In such a configuration, the transmission arm of the brake pedal is disposed behind the swing arm pivot that connects the body of the saddle-ride type vehicle and the swing arm. Also, the master cylinder is disposed above the swing arm pivot and in front of the transmission arm.

JP, 2014-65459, A

However, in the above-mentioned prior art, for example, the master cylinder is disposed on the front side with respect to the transmission arm, that is, on the side where the swing arm pivot and the power unit are located. For this reason, it is necessary to arrange the master cylinder so as not to interfere with the swing arm pivot or the power unit. In addition, in the saddle-ride type vehicle, the shape of the vehicle body (frame) and the layout of the engine may differ depending on the vehicle, and the layout of parts such as a master cylinder constituting the front and rear interlocking brake device may be difficult.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a front / rear interlocking brake device for a saddle-ride type vehicle which can increase the degree of freedom of the layout of parts constituting the front / rear interlocking brake device.

As means for solving the above problems, according to a first aspect of the present invention, there is provided a front and rear interlocking brake device (50) of a saddle-ride type vehicle (1) in which front wheel brake (32) and rear wheel brake (31) are interlocked. (5) A brake pedal (34) rotatably provided, an equalizer arm (52) rotatably connected to the brake pedal (34), and one end (52a) of the equalizer arm (52) A rear wheel brake transmission member (33) connected to the rear wheel brake (31), and a master cylinder (55) for causing the front wheel brake (32) to exert a braking force by receiving the operation force. And the front wheel brake transmission member (54) extends rearward of the equalizer arm (52).
According to a second aspect of the present invention, in the first aspect, the swing arm is rotatably supported by the vehicle body (5) by a swing arm pivot (15p) and rotatably supports the rear wheel (14). The master cylinder (55) is disposed within a swing range (A1) of the swing arm (15) in a side view.
According to a third aspect of the present invention, in the second aspect, the master cylinder (55) is disposed at a position where at least a portion thereof overlaps the rear wheel (14) in a side view.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the master cylinder (55) is disposed so as to turn the axial direction in the longitudinal direction of the vehicle body (5). The master cylinder (55) includes a cylinder rod (55r) which protrudes and retracts in the axial direction at the rear end of the cylinder body (55b), and the front wheel brake transmission member (54) is of the master cylinder (55). It extends along the axial direction and has a front end (54f) connected to the equalizer arm (52) and a rear end (54r) connected to the cylinder rod (55r).

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the front wheel brake transmission member (54) is disposed on each of the left and right sides of the master cylinder (55). 55) has a pair of arms (54A, 54B) extending along the axial direction.

The sixth aspect of the present invention is, in the fifth aspect, further provided with a cover portion (58) attached to the front wheel brake transmission member (54) and covering the upper side of the master cylinder (55).

In a seventh aspect of the present invention according to any one of the first to the sixth aspects, the front wheel brake transmission member (54) has a position at least partially overlapping the master cylinder (55) in a side view. Is located in

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the front wheel brake transmission member (54) is substantially parallel to the rear wheel brake transmission member (33) in a side view. An intermediate portion (52c) of the equalizer arm (52) is disposed between the rear wheel brake transmission member (33) and the front wheel brake transmission member (54) in a side view.

According to a ninth aspect of the present invention, in any one of the first to eighth aspects, the rear wheel (14) is supported swingably by a swing arm pivot (15p) on the vehicle body (5). The swing arm (15) rotatably supported is provided, and the master cylinder (55) is disposed outside the swing arm (15) in the width direction of the vehicle body (5) in a plan view, and the side view , And at least a part of them is disposed at a position overlapping with the swing arm (15).

According to a tenth aspect of the present invention, in any one of the first to ninth aspects, the master cylinder (55) is fixed to a step bracket (60) that supports a rear seat step (19). It is done.

According to an eleventh aspect of the present invention, in the tenth aspect, the step bracket (60) is provided above the master cylinder (55) and is connected to the vehicle body (5). And a lower frame (62) provided below the master cylinder (55) and connected to the vehicle body (5), and the upper frame (61) and the lower frame (62) in a side view And the master cylinder (55) is disposed therebetween.

According to a twelfth aspect of the present invention, in any one of the first to eleventh aspects, the front wheel brake transmission member (54) is opposite to the operating force input from the equalizer arm (52). A biasing member (59) is provided for biasing in the direction.
According to a thirteenth aspect of the present invention, in the twelfth aspect, the biasing member (59) is attached at one end to the vehicle body member (60) supporting the master cylinder (55) and at the other end It is attached to the front wheel brake transmission member (54).

According to the first to third aspects, since the front wheel brake transmission member and the master cylinder are disposed to the rear of the equalizer arm, the front wheel brake transmission member and the vehicle body and engine etc. disposed to the front of the brake pedal Interference with the master cylinder can be avoided. Therefore, the degree of freedom of the layout of the parts constituting the front and rear interlocking brake device can be enhanced. As a result, the interlocking brake device can be provided while suppressing a significant change in the frame shape and the like.

According to the fourth aspect, by operating the cylinder rod at the rear end portion of the front wheel brake transmission member extending along the master cylinder, a complex mechanism is not used to cause the front wheel brake to exert the braking force. It is possible to make the front wheel brake exert the braking force with a simple configuration.

According to the fifth aspect, since the front wheel brake transmission member is provided with two pairs of arm portions on the left and right sides of the master cylinder, a moment in the tilting direction is not generated with respect to the cylinder rod of the master cylinder. The operating force transmitted from the equalizer arm can be efficiently transmitted.

According to the sixth aspect, since the cover portion covering the upper side of the master cylinder is further provided, it is possible to suppress the application of water, earth and sand, pebbles and the like from the upper side to the master cylinder. This can suppress contamination and damage of the master cylinder.

According to the seventh aspect, since the front wheel brake transmission member is disposed at a position where at least a portion thereof overlaps with the master cylinder in a side view, water, earth and sand, pebbles, etc. are applied to the master cylinder from the side. You can reduce the This can suppress contamination and damage of the master cylinder.

According to the eighth aspect, the intermediate portion of the equalizer arm is disposed between the rear wheel brake transmission member and the front wheel brake transmission member substantially parallel to each other in a side view. A rear wheel brake transmission member and a front wheel brake transmission member are respectively connected to both ends of the equalizer arm. Thus, the front wheel brake transmission member, the rear wheel brake transmission member, and the equalizer arm can be efficiently arranged in the space of the vehicle body frame in which the mounting space is limited.

According to the ninth aspect, the master cylinder is disposed outside the swing arm in the width direction of the vehicle body frame in plan view. The master cylinder is disposed at a position overlapping the swing arm in a side view. As a result, even when peripheral parts such as a muffler are deformed due to a fall, a side collision or the like, the swing arm prevents the master cylinder from moving inward in the width direction of the vehicle body frame. Therefore, it is possible to suppress the master cylinder from interfering with other parts.

According to the tenth aspect, the master cylinder is fixed to a step bracket that supports a pillion step for the rear seat. Thus, the master cylinder can be fixed to an appropriate position on the vehicle body frame side without requiring a separate stay or the like.

According to the eleventh aspect, the master cylinder is disposed between the upper frame and the lower frame of the step bracket in a side view. As a result, even when the step bracket rotates or deforms inward in the vehicle width direction about the connecting portion to the vehicle body frame, the contact between the master cylinder and the step bracket can be avoided.

According to the twelfth and thirteenth aspects, the front wheel brake transmission member is provided with the biasing member that biases the front wheel brake transmission member in the direction opposite to the operation force from the equalizer arm. Thus, only the rear wheel brake transmission member operates until the operation force exceeds the biasing force of the biasing member, and the front wheel brake transmission member operates according to the increase in the operation force. Therefore, it is possible to configure an interlocking brake device in which the rear wheel brake precedes and exerts the braking force, and the front wheel brake exerts the braking force with a time difference.

1 is a side view of a motorcycle according to an embodiment of the present invention. It is a side view of the front and back interlocking brake device of the above-mentioned motorcycle. FIG. 2 is a perspective view of the front and rear interlocking brake device as viewed obliquely from the front. It is the perspective view which looked at the above-mentioned interlocking brake device from diagonally back. FIG. 5 is a plan view of the front and rear interlocking brake device as viewed from above. It is a side view showing the state where the above-mentioned front and back interlocking brake device is carrying out the 1st operation. It is a side view showing the state where the above-mentioned front and back interlocking brake device is carrying out the 2nd operation. It is a side view of a front wheel brake transmission member, a master cylinder, and a cover part of the front and back interlocking brake device. It is an IX arrow line view of FIG. It is a perspective view of the above-mentioned cover part.

Hereinafter, embodiments of the present invention will be described based on the drawings. In the drawings used below, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow LH indicates the left of the vehicle.

As shown in FIG. 1, the front wheels 2 of a motorcycle (saddle-ride type vehicle) 1 are supported by lower end portions of a pair of left and right front forks 3. The upper portions of the left and right front forks 3 are steerably supported by a head pipe 6 at the front end of a vehicle body frame (vehicle body) 5 via a steering stem 4. A steering handle bar 4 a is attached to the steering stem 4. A front cowl 4 b is attached to the front of the steering stem 4.

The vehicle body frame 5 is formed by integrally connecting a plurality of types of steel materials by welding or the like. The body frame 5 has a main frame 7, a down frame 8, a hanger bracket 9, a pivot bracket 11, a seat rail 12, and a support pipe 13.

The main frame 7 extends obliquely downward and rearward from the upper rear side of the head pipe 6 and then bends and extends downward. The down frame 8 extends diagonally downward and rearward from the lower rear side of the head pipe 6. The hanger bracket 9 is provided continuously to the lower end portion of the down frame 8. The pivot bracket 11 is disposed at the front-rear middle portion of the vehicle body frame 5 and provided at the rear lower end portion of the main frame 7. The seat rails 12 form a left and right pair and extend rearward from the rear side of the bent portion of the main frame 7. The support pipe 13 has a left-right pair, and extends obliquely upward from the rear side of the pivot bracket 11 toward the front-rear direction middle portion of the left and right seat rails 12.

The rear wheel 14 of the motorcycle 1 is supported by a rear end portion of a swing arm 15 which extends in the front and rear direction on the lower side of the rear portion of the vehicle body. The front end portion of the swing arm 15 is vertically pivotably supported by the pivot bracket 11 via a pivot shaft (swing arm pivot) 15p. The rear portion of the swing arm 15 is supported by the rear portion of the vehicle body frame 5 via a pair of left and right cushion units 15d.
The rear wheel 14 is connected to an engine 21 which is a prime mover of the motorcycle 1 via, for example, a chain type transmission mechanism 14a disposed on the left rear side of the vehicle body.

The engine 21 is mounted on the vehicle body frame 5 below the main frame 7. A fuel tank 16 is disposed above the engine 21. A seat 17 is disposed behind the fuel tank 16. In the figure, reference numeral 18 denotes a main step for the driver, and reference numeral 19 denotes a pillion step for the rear passenger.

The engine 21 includes a crankcase 22 and a cylinder 23. An intake device 25 is connected to the rear of the cylinder 23. An exhaust pipe 24 a is connected to the front of the cylinder 23. The exhaust pipe 24 a is bent across the front and the lower of the engine 21 and extends rearward. A muffler 24b is connected to the rear end of the exhaust pipe 24a. The muffler 24 b is disposed on the rear right side of the vehicle body and is supported by the step bracket 60 on the right side of the vehicle body.

A body cover made of synthetic resin is attached around the vehicle body of the motorcycle 1. Specifically, the front cowl 4 b is attached to the steering stem 4. A front fender 4 c is attached between the left and right front forks 3. Left and right side covers 26 are attached to the left and right sides of the front and rear intermediate portion of the vehicle body frame 5. Left and right rear side covers 27 are attached to the left and right sides of the rear of the vehicle body frame 5. A rear end cover 28 is attached to the rear end of the vehicle body frame 5. A rear fender 29 is attached below the rear end of the vehicle body frame 5.

The motorcycle 1 is provided with a front wheel brake 32 and a rear wheel brake 31.
The front wheel brake 32 is a hydraulic disk brake, and includes a brake disk 32 d and a brake caliper 32 c. The brake caliper 32c receives a hydraulic pressure from a not-shown front master cylinder provided on the bar handle 4a and a hydraulic pressure from a master cylinder 55 described later, and brings a not-shown brake pad into sliding contact with the brake disc 32d. Thereby, the braking force is applied to the front wheel 2 rotating with the brake disc 32d.

The rear wheel brake 31 is a mechanical drum brake, and includes a drum portion 31 d, a brake pedal 34, and a brake rod 33.
The drum portion 31 d accommodates a brake shoe (not shown) inside. The drum portion 31 d applies braking force to the rear wheel 14 that rotates with the drum portion 31 d by bringing a brake shoe into sliding contact with the inner circumferential surface. The brake pedal 34 is swingably supported by the vehicle body frame 5 via a shaft 5s along the vehicle width direction (left and right direction) on the lower right side of the vehicle body.

The brake pedal 34 includes a cylindrical pedal pivot 34a passing through the shaft 5s, a pedal arm 34b extending forward from the pedal pivot 34a, and a transfer arm 34c extending upward from the pedal pivot 34a so as to be integrally rotatable. . The front end portion of the pedal arm 34b is provided with a pedal portion 34d for inputting an operating force by the occupant stepping on the foot from above.

The brake pedal 34 swings the transfer arm 34 c forward when the pedal portion 34 d is stepped on. At the upper end of the transfer arm 34c, an intermediate portion 52c in the vertical direction of the equalizer arm 52 is swingably supported via a connecting pin 56 along the vehicle width direction. A front end portion of a brake rod 33, which is a rear wheel brake transmission member, is swingably connected to a lower end portion (one end portion) 52a of the equalizer arm 52 via a connecting pin 33p extending in the vehicle width direction. The rear end portion of the brake rod 33 is connected to a swing arm 31r provided outside the drum portion 31d. A front end portion of a front wheel brake transmission member 54 is swingably connected to an upper end portion (other end portion) 52 b of the equalizer arm 52 via a connecting pin 54 p extending in the vehicle width direction. The rear end portion of the front wheel brake transmission member 54 is connected to a cylinder rod 55 r provided at the rear end portion of the master cylinder 55.

When the pedal portion 34d is stepped on and the transmission arm 34c is swung forward, the equalizer arm 52 appropriately distributes and transmits the operating force to the brake rod 33 and the front wheel brake transmission member 54. As a result, it is possible to appropriately interlock the front and rear brakes by the operation of the brake pedal 34.

The motorcycle 1 includes a front and rear interlocking brake device 50 that interlocks the front wheel brake 32 and the rear wheel brake 31.
As shown in FIGS. 2 to 5, the front / rear interlocking brake device 50 includes an equalizer arm 52, a front wheel brake transmission member 54, a master cylinder 55, and an urging member 59.

The equalizer arm 52 is arranged to extend in the vertical direction. In the equalizer arm 52, an intermediate portion 52c in the vertical direction is connected to the upper end of the transmission arm 34c, a lower end 52a is connected to the front end of the brake rod 33, and an upper end 52b is connected to the front end of the front wheel brake transmission member 54 It is done.

The front wheel brake transmission member 54 extends in the front-rear direction substantially in parallel with the brake rod 33 in a side view, and is disposed above the brake rod 33. The front wheel brake transmission member 54 has a U shape that opens rearward in a plan view, and is formed to surround the master cylinder 55 whose axial direction is directed in the front-rear direction.

As shown in FIG. 5, the front wheel brake transmission member 54 is formed, for example, by bending a belt-like steel plate into a U-shape in plan view. The front wheel brake transmission member 54 has a pair of

arm portions

54A and 54B disposed on the left and right sides of the master cylinder 55. The left and

right arm portions

54A and 54B each have a plate shape extending along the axial direction of the master cylinder 55. Front ends 54f of the left and

right arms

54A and 54B are connected to an upper end 52b of the equalizer arm 52, respectively. The left and

right arm portions

54A and 54B are integrally connected to each other at a rear end portion 54r of the front wheel brake transmission member 54.

As shown in FIGS. 4 and 8, the front wheel brake transmission member 54 has a cover portion 58 so as to close the upper end opening of the front wheel brake transmission member 54 across the upper edges of the pair of

arm portions

54A and 54B. It is attached. The cover portion 58 covers the master cylinder 55 inside the front wheel brake transmission member 54 from above.

The front wheel brake transmission member 54 moves relative to the master cylinder 55 fixed to the vehicle body frame 5. By providing the front wheel brake transmission member 54 and the cover portion 58 covering the master cylinder 55 from above, the influence of foreign matter from above on the movement of the front wheel brake transmission member 54 is suppressed.

As shown in FIGS. 8 to 10, the cover portion 58 has a flat portion 58a substantially parallel to the upper portion of the front wheel brake transmission member 54 and an outer peripheral portion 58b extending downward from the outer peripheral edge of the flat portion 58a. For example, they are integrally formed of synthetic rubber such as EPDM. The flat portion 58 a of the cover portion 58 is fastened to the fixed portion 55 c protruding from the upper portion of the master cylinder 55 by a screw v 1. In addition to the insertion hole 58c for the screw v1, the flat portion 58a is formed with an opening 58d for avoiding the respective connection portions of the banjo and the reservoir, and the lower surface side of the flat portion 58a is continuous with the front and rear slits 58e described later. Front and rear groove portions 58f are formed in the same manner. In the figure, reference numeral 55d denotes a vehicle body fastening portion formed in the lower portion of the master cylinder 55 and fastened to the vehicle body side.

The front and rear intermediate portions 58x of the cover portion 58 are fixed to the master cylinder 55 by screws v1. With the cover 58 fixed to the master cylinder 55, the lower edge of the outer peripheral portion 58 b elastically abuts on the upper edge of the front wheel brake transmission member 54. At the lower edge of the outer peripheral portion 58b at the front portion 58y forward of the front and rear intermediate portions 58x of the cover portion 58 and at the rear portion 58z rear than the front and rear intermediate portions 58x, the front wheel brake transmission member 54 Ribs 58y1 and 58z1 protruding to the outer peripheral side are formed in order to prevent this.

The front wheel brake transmission member 54 is pulled forward by the swing of the equalizer arm 52 via the connecting pin 54p. At this time, the connecting pin 54p moves along a locus K1 having a circular arc shape in a side view, and the front wheel brake transmitting member 54 swings around a connecting portion of the master cylinder 55 with the cylinder rod 55r. That is, front wheel brake transmission member 54 and master cylinder 55 are not always parallel, and front wheel brake transmission member 54 slightly swings relative to master cylinder 55. Therefore, the front wheel brake transmission member 54 not only slides substantially in parallel to the cover portion 58 fixed to the master cylinder 55, but also slightly swings relative to the cover portion 58.

The cover portion 58 holds the entire shape by the flat portion 58a and the outer peripheral portion 58b, but the front and rear slits 58e are formed by cutting out the outer peripheral portion 58b between the front and rear intermediate portions 58x and the front 58y and the rear 58z. Is formed. The front and rear slits 58e allow the front 58y and the rear 58z of the cover 58 to swing up and down with respect to the front and rear intermediate portion 58x fixed to the master cylinder 55. Therefore, even if the front wheel brake transmission member 54 swings with respect to the cover portion 58, the cover portion 58 can easily follow the swing, and the contact load on the front wheel brake transfer member 54 is reduced. A front and rear groove 58f is formed on the inner surface side of the cover 58 so that the flat portion 58a is easily bent at the front and rear slits 58e, and a front and rear rib 58g is provided to prevent the outer peripheral portion 58b from falling against the flat portion 58a of the front and rear intermediate portion 58x. It is formed.

As shown in FIG. 6, the biasing member 59 biases the front wheel brake transmission member 54 in the direction opposite to the operation force input from the equalizer arm 52, that is, in the backward direction. The biasing member 59 is, for example, a coil spring. The biasing member 59 is connected to the step bracket 60 fixed to the vehicle body frame 5 and the stay 54 s formed on the front wheel brake transmission member 54.

The master cylinder 55 is disposed so as to turn the axial direction in the front-rear direction. The master cylinder 55 includes a cylinder body 55b and a cylinder rod 55r. The cylinder rod 55r protrudes and retracts along the axial direction at the rear end of the cylinder body 55b.

As shown in FIG. 5, the master cylinder 55 is accommodated between the pair of

arm portions

54A and 54B. The cylinder rod 55r of the master cylinder 55 is connected to the rear end portion 54r of the front wheel brake transmission member 54 using a lock nut 55n or the like. When the front brake transmission member 54 is displaced forward by receiving the operation force inputted to the brake pedal 34, the master cylinder 55 displaces the cylinder rod 55r forward via the rear end portion 54r. The cylinder body 55b is fixed to the vehicle body frame 5, and the master cylinder 55 generates an oil pressure by the forward movement of the cylinder rod 55r. The hydraulic pressure is supplied to the brake caliper 32c via a hydraulic pipe (not shown) to cause the front wheel brake 32 to exert a braking force.

As shown in FIGS. 2 to 4, the cylinder body 55 b of the master cylinder 55 is fixed via a bracket 57 to a step bracket 60 that supports the pillion step 19 for the rear seat.

The step bracket 60 includes an upper frame 61 whose front end 61 a is connected to the vehicle body frame 5 and a lower frame 62 whose front end 62 a is connected to the vehicle body frame 5. The upper frame 61 is inclined upward to the front, and the lower frame 62 is inclined downward to the front. The rear ends of the upper frame 61 and the lower frame 62 are connected to each other through a plate 63 to which the pillion step 19 is attached. The step bracket 60 has a V-shape that opens forward in a side view. The master cylinder 55 is disposed between the upper frame 61 and the lower frame 62.

As shown in FIG. 2, the master cylinder 55 is disposed within the swing range A1 of the swing arm 15 in a side view. The swing arm 15 shown in FIG. 2 is in the position of the 1 G state where the rear suspension sinks under the load of the vehicle weight. The swing range A1 is sandwiched between the lower end (line 15a in the figure) of the swing arm 15 with the rear suspension fully extended and the upper end (line 15b in the figure) with the rear suspension fully sunk Fan-shaped range.
If the master cylinder 55 is within the swing range A1 of the swing arm 15 in a side view, and if the periphery of the master cylinder 55 receives an external force from the outside, the swing arm 15 performs the master operation regardless of the telescopic state of the rear suspension. It is easy to prevent the movement of the cylinder 55 inward in the vehicle width direction.

Further, the master cylinder 55 is disposed at a position where at least a part (the rear in the present embodiment) overlaps the rear wheel 14 in a side view. That is, the master cylinder 55 is spaced rearward from the pivot shaft 15p in a side view. The swing range A1 of the swing arm 15 widens as it is separated rearward from the pivot shaft 15p, so the master cylinder 55 can be easily disposed.

The step bracket 60 may rotate or deform inward in the vehicle width direction about a line connecting the front ends 61a and 62a of the upper frame 61 and the lower frame 62 when an external force is applied from the side due to a fall, a collision or the like. Also in this case, since the master cylinder 55 is disposed between the upper frame 61 and the lower frame 62, the contact between the step bracket 60 and the master cylinder 55 can be easily avoided.

In the front-rear interlocking brake device 50 described above, the front wheel brake transmission member 54 extends rearward of the equalizer arm 52, and the brake rod 33, the front wheel brake transmission member 54, and the master cylinder 55 are the brake pedal 34 and the equalizer arm in a side view. It is arranged behind 52. Furthermore, the brake rod 33, the front wheel brake transmission member 54, and the master cylinder 55 are disposed rearward of the pivot shaft 15p in a side view.

The front wheel brake transmission member 54 is disposed at a position where at least a portion thereof overlaps with the master cylinder 55 in a side view.
Furthermore, the front wheel brake transmission member 54 is provided substantially in parallel with the brake rod 33 in a side view.

Further, the master cylinder 55 is disposed on the outer side in the width direction of the vehicle body frame 5 with respect to the swing arm 15 in a plan view, and at least a part thereof is disposed at a position overlapping the swing arm 15 in a side view.

In the front-rear interlocking brake device 50 described above, when the brake pedal 34 is operated, the transmission arm 34c of the brake pedal 34 pivots forward about the shaft 5s. When the transfer arm 34c swings forward, the middle portion 52c of the equalizer arm 52 connected to the transfer arm 34c via the connecting pin 56 is moved forward.

The front wheel brake transmission member 54 is biased rearward (in the direction opposite to the operation force) by the biasing member 59. Therefore, as shown in FIG. 6, the equalizer arm 52 moves the lower end 52a about the upper end 52b without moving the upper end 52b, as shown in FIG. It swings to displace only the brake rod 33 forward. Thereby, the rear wheel brake 31 precedes and exerts the braking force.

When the operation amount of the brake pedal 34 increases and the braking force of the rear wheel brake 31 increases, the operation reaction force of the rear wheel brake 31 increases. When the operation reaction force increases, the rearward displacement of the brake rod 33 is restricted, and the rearward swing of the lower end 52a of the equalizer arm 52 is restricted. As a result, as shown in FIG. 7, the equalizer arm 52 moves the upper end 52 b against the biasing force of the biasing member 59. At this time, the equalizer arm 52 swings so as to move the upper end 52 b about the lower end 52 a without moving the lower end 52 a. The equalizer arm 52 further displaces the front wheel brake transmission member 54 forward with the brake rod 33 pulled, and displaces the cylinder rod 55r of the master cylinder 55 forward. Thereby, the master cylinder 55 generates an oil pressure, and the oil pressure is supplied to the brake caliper 32 c of the front wheel brake 32. Then, the front wheel brake 32 lags behind the rear wheel brake 31 to exert the braking force, and the front and rear brakes are interlocked.

As described above, in the front-rear interlocking brake device 50, even if the equalizer arm 52 is pulled by the operation force input to the brake pedal 34, the equalizer arm 52 is not moved forward until a force exceeding the biasing force by the biasing member 59 acts. The brake transmission member 54 is not displaced. Therefore, the operation force transmitted to the equalizer arm 52 is transmitted only to the brake rod 33 until the front brake transmission member 54 starts to be displaced. That is, the rear wheel brake 31 precedes and exerts the braking force. When the brake pedal 34 is further depressed and a force exceeding the biasing force of the biasing member 59 acts on the equalizer arm 52, the front wheel brake 32 exerts a braking force with the rear wheel brake 31 with a time difference. Thus, the front and rear brakes are interlocked by the operation of the brake pedal 34.
Here, the timing at which the front and rear brakes interlock can be adjusted by adjusting the biasing force of the biasing member 59, the lever ratio of the equalizer arm 52, and the like.

As described above, in the front-rear interlocking brake device of the saddle-ride type vehicle of the present embodiment, the front wheel brake transmission member 54 extends rearward of the equalizer arm 52, and the brake rod 33 and the front wheel brake transmission member 54 The master cylinder 55 is disposed behind the equalizer arm 52.
Thereby, interference between the brake rod 33, the front wheel brake transmission member 54 and the master cylinder 55 can be avoided with the engine 21 and the like disposed in front of the brake pedal 34. Therefore, the degree of freedom in the layout of the parts constituting the front / rear interlocking brake device 50 can be enhanced. As a result, the interlocking brake can be provided while suppressing a significant change in the frame shape and the like.

Furthermore, in the present embodiment, the brake rod 33, the front wheel brake transmission member 54, and the master cylinder 55 are disposed rearward of the pivot shaft 15p in a side view.
Thereby, the brake rod 33, the front wheel brake transmission member 54, and the master cylinder 55 can suppress interference with the pivot shaft 15p as well as the engine 21 of the vehicle body frame 5, and the vehicle body frame 5 supporting the pivot shaft 15p. . Therefore, the degree of freedom in the layout of the parts constituting the front / rear interlocking brake device 50 can be enhanced.

Further, in the present embodiment, the front wheel brake transmission member 54 extends along the axial direction of the master cylinder 55, the front end 54f is connected to the equalizer arm 52, and the rear end 54r is connected to the cylinder rod 55r. .
Thus, by operating the cylinder rod 55r with the rear end portion 54r of the front wheel brake transmission member 54 extending along the master cylinder 55, the front wheel brake 32 can exert the braking force. Therefore, without using a complicated mechanism for causing the front wheel brake 32 to exert the braking force, it is possible to cause the front wheel brake 32 to exhibit the braking force with a simple configuration.

Further, the front wheel brake transmission member 54 is provided with a pair of

arm portions

54A and 54B extending along the axial direction of the master cylinder 55 on the left and right sides of the master cylinder 55, respectively.
Thereby, the operation force transmitted from the equalizer arm 52 can be transmitted to the cylinder rod 55r of the master cylinder 55 equally in the left and right. As a result, it is possible to suppress the occurrence of an unnecessary moment due to the unequal left and right forces acting on the master cylinder 55.

In addition, the front wheel brake transmission member 54 is attached with a cover 58 that covers the upper side of the master cylinder 55.
Thus, it is possible to suppress water, earth and sand, pebbles and the like from above on the master cylinder 55 while the vehicle is traveling. As a result, it is possible to suppress damage to the cylinder rod 55r that protrudes into and retracts from the master cylinder 55 and biting of foreign matter.

The front wheel brake transmission member 54 is disposed at a position where at least a portion thereof overlaps with the master cylinder 55 in a side view.
Thus, it is possible to suppress water, earth and sand, pebbles and the like from the side on the master cylinder 55 while the vehicle is traveling. As a result, it is possible to suppress damage to the cylinder rod 55r that protrudes into and retracts from the master cylinder 55 and biting of foreign matter.

The front wheel brake transmission member 54 is provided substantially parallel to the brake rod 33 in a side view, and an intermediate portion 52c of the equalizer arm 52 is provided between the brake rod 33 and the front wheel brake transmission member 54 in a side view There is.
According to this configuration, the front wheel brake transmission member 54 and the brake rod 33 can be efficiently arranged in the space of the vehicle body frame 5 in which the mounting space is limited.

Further, the master cylinder 55 is disposed on the outer side in the width direction of the vehicle body frame 5 with respect to the swing arm 15 in a plan view, and at least a part thereof is disposed at a position overlapping the swing arm 15 in a side view.
According to this configuration, the master cylinder 55 and the swing arm 15 can be overlapped in a side view in the parking state or the riding state. As a result, even if peripheral parts such as the muffler 24b are deformed due to a fall, a side collision or the like, the swing arm 15 prevents the master cylinder 55 from moving inward in the width direction of the vehicle body frame 5. Therefore, it is possible to suppress the master cylinder 55 from interfering with other parts.

Further, the master cylinder 55 is fixed to a step bracket 60 which supports a pillion step 19 for the rear seat. Thus, the master cylinder 55 can be fixed to the vehicle body frame 5.

The step bracket 60 further includes an upper frame 61 provided above the master cylinder 55 and connected to the vehicle body frame 5, and a lower frame 62 provided below the master cylinder 55 and connected to the vehicle body frame 5. Have. When the upper frame 61 and the lower frame 62 rotate or deform inward in the width direction of the vehicle body frame 5 about the connecting portion to the vehicle body frame 5, the master cylinder 55 does not contact.
According to this configuration, even if the upper frame 61 and the lower frame 62 of the step bracket 60 rotate or deform inward in the width direction of the vehicle body frame 5 centering on the connecting portion to the vehicle body frame 5 due to falling or collision. Interference of the master cylinder 55 can be suppressed.

Furthermore, the front wheel brake transmission member 54 is provided with a biasing member 59 that biases the front brake transmission member 54 in the direction opposite to the operation force input from the equalizer arm 52.
According to such a configuration, the operating force transmitted via the equalizer arm 52 is the brake rod until the operating force exceeds the biasing force of the biasing member 59 and the front wheel brake transmission member 54 starts to be displaced. It is transmitted to 33. That is, the rear wheel brake 31 precedes and exerts the braking force, and the front wheel brake 32 exerts the braking force with a time difference.
Here, by adjusting the setting value of the biasing force of the biasing member 59, the timing at which the rear wheel brake 31 and the front wheel brake 32 exert the braking force can be adjusted.

The present invention is not limited to the above-described embodiments described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the above embodiment, the master cylinder 55 includes the cylinder rod 55r at the rear and operates the cylinder rod 55r at the rear end portion 54r of the front wheel brake transmission member 54, but the invention is not limited thereto. For example, a master cylinder provided with a cylinder rod at the front may be operated by an appropriate front wheel brake transmission member. In that case, the master cylinder may cause the front wheel brake to exert a braking force when the cylinder rod moves forward.
Also, although the rear wheel brake 31 is mechanical, the rear wheel brake 31 may be hydraulic. In that case, the rear wheel brake transmission member transmits the operating force to the master cylinder that supplies the hydraulic pressure to the rear wheel brake's brake caliper.
The brake pedal 34 is not limited to one supported by the vehicle body frame 5 but may be supported by a structure such as a power unit that constitutes the vehicle body integrally with the vehicle body frame.

The saddle-ride type vehicle includes all vehicles on which the driver straddles the vehicle body, and not only motorcycles (including motor bikes and scooter type vehicles), but also three-wheeled vehicles (one front wheel and two rear wheels). In addition, vehicles including front two wheels and one rear wheel vehicle) or four wheel vehicles are also included, and vehicles including an electric motor as a prime mover are also included.
And the composition in the above-mentioned embodiment is an example of the present invention, and various change is possible in the range which does not deviate from the gist of the said invention.

According to the front-rear interlocking brake device of the saddle-ride type vehicle described above, it is possible to increase the degree of freedom of the layout of the parts constituting the front-rear interlocking brake device.

1 Motorcycles (saddle type vehicles)
5 Body frame (body)
15 Swing arm 15p Pivot axis (swing arm pivot)
19 pillion step (step)
31 rear wheel brake 32 front wheel brake 33 brake rod (rear wheel brake transmission member)
34 brake pedal 50 front and rear interlock brake device 52 equalizer arm 52a lower end (one end)
52b upper end (other end)
52c middle part 54 front wheel

brake transmission member

54A, 54B arm part 54f front end part 54r rear end part 55 master cylinder 55b cylinder main body 55r cylinder rod 58 cover part 59 biasing member 60 step bracket 61 upper frame 62 lower frame A1 swing range

Claims

In the front-rear interlocking brake device (50) of a saddle-ride type vehicle (1) in which the front wheel brake (32) and the rear wheel brake (31) are interlocked,
A brake pedal (34) rotatably mounted on the vehicle body (5);
An equalizer arm (52) pivotally connected to the brake pedal (34);
A rear wheel brake transmission member (33) connected to one end (52a) of the equalizer arm (52) to transmit an operating force to the rear wheel brake (31);
A front wheel brake transmission member (54) connected to the other end (52b) of the equalizer arm (52) to transmit an operating force to the front wheel brake (32);
And a master cylinder (55) that receives the operation force and causes the front wheel brake (32) to exert a braking force.
The front wheel brake transmission member (54) extends rearward of the equalizer arm (52).
Front-rear interlocking brake system for saddle-ride type vehicles.
The vehicle body (5) is swingably supported by a swing arm pivot (15p) and has a swing arm (15) rotatably supporting the rear wheel (14).
The master cylinder (55) is disposed within a swing range (A1) of the swing arm (15) in a side view.
A front-rear interlocking brake device for a saddle-ride type vehicle according to claim 1.
The master cylinder (55) is disposed at a position where at least a portion thereof overlaps the rear wheel (14) in a side view.
The front-rear interlocking brake device for a saddle-ride type vehicle according to claim 2.
The master cylinder (55) is disposed so as to turn the axial direction in the longitudinal direction of the vehicle body (5),
The master cylinder (55) includes a cylinder rod (55r) that protrudes and retracts in the axial direction at the rear end of the cylinder body (55b),
The front wheel brake transmission member (54) extends along the axial direction of the master cylinder (55), the front end (54f) is connected to the equalizer arm (52), and the rear end (54r) is the cylinder Connected to the rod (55r),
The front-rear interlocking brake device for a saddle-ride type vehicle according to any one of claims 1 to 3.
The front wheel brake transmission member (54) has a pair of arm portions (54A, 54B) extending along the axial direction of the master cylinder (55) on the left and right sides of the master cylinder (55). Yes,
The front-rear interlocking brake device for a saddle-ride type vehicle according to any one of claims 1 to 4.
A cover (58) attached to the front wheel brake transmission member (54) and covering the upper side of the master cylinder (55) is further provided.
The front-rear interlocking brake device for a saddle-ride type vehicle according to claim 5.
The front wheel brake transmission member (54) is disposed at a position where at least a portion thereof overlaps the master cylinder (55) in a side view.
The front-rear interlocking brake device for a saddle-ride type vehicle according to any one of claims 1 to 6.
The front wheel brake transmission member (54) is provided substantially parallel to the rear wheel brake transmission member (33) in a side view,
An intermediate portion (52c) of the equalizer arm (52) is disposed between the rear wheel brake transmission member (33) and the front wheel brake transmission member (54) in a side view.
The front-rear interlocking brake device for a saddle-ride type vehicle according to any one of claims 1 to 7.
The vehicle body (5) is swingably supported by a swing arm pivot (15p) and has a swing arm (15) rotatably supporting the rear wheel (14).
The master cylinder (55) is disposed on the outer side in the width direction of the vehicle body (5) with respect to the swing arm (15) in plan view, and at least a part overlaps with the swing arm (15) in side view Placed in position,
The front-rear interlocking brake device for a saddle-ride type vehicle according to any one of claims 1 to 8.
The master cylinder (55) is fixed to a step bracket (60) supporting a step (19) for the rear seat,
The front-rear interlocking brake device for a saddle-ride type vehicle according to any one of claims 1 to 9.
The step bracket (60) is
An upper frame (61) provided above the master cylinder (55) and connected to the vehicle body (5);
A lower frame (62) provided below the master cylinder (55) and connected to the vehicle body (5);
The master cylinder (55) is disposed between the upper frame (61) and the lower frame (62) in a side view.
The front-rear interlocking brake device for a saddle-ride type vehicle according to claim 10.
The front wheel brake transmission member (54) is provided with a biasing member (59) for biasing the front wheel brake transmission member (54) in the direction opposite to the operation force input from the equalizer arm (52).
The front-rear interlocking brake device for a saddle-ride type vehicle according to any one of claims 1 to 11.
The biasing member (59) is attached at one end to a vehicle body member (60) supporting the master cylinder (55) and at the other end to the front wheel brake transmission member (54).
A front-rear interlocking brake device for a saddle-ride type vehicle according to claim 12.