JP4943994B2 - Brake device and saddle riding type vehicle - Google Patents

Abstract

The invention relates to a brake device and straddle-type vehicle. In order to provide the brake device which has appreciably-reduced loss of the operation force passed in a passing path from a interlock brake lever to a front wheel brake, the brake device (10) of the invention comprises: a front wheel brake lever (20) provided on a first side of a handlebar (4); an interlock brake lever (40) provided on a second side of the handlebar (4) and connected to a rear wheel brake (17); a front wheel brake actuation mechanism (30) disposed on the second side of the handlebar (4) adjacent to the interlock brake lever (40) to generate a fluid pressure in a hydraulic path (12) connected to a front wheel brake (14) by an operation force of the front wheel brake lever (20) or the interlock brake lever (40) so as to actuate the front wheel brake (14); and a transmission cable (21) provided to extend between the first and second sides of the handlebar (4) to transmit the operation force of the front wheel brake lever (20) to the front wheel brake actuation mechanism (30).

Description

  The present invention relates to a brake device that operates both a front wheel brake and a rear wheel brake by operating one of two brake levers provided on the left and right sides of a handle.

Conventionally, as a brake device used in a saddle riding type vehicle such as a motorcycle, when operating one of the two brake levers provided on the left and right sides of the handle, both the front wheel brake and the rear wheel brake are operated, and the other operation is performed. Sometimes only the front wheel brake is activated. In such a brake device, a brake lever that operates both the front wheel brake and the rear wheel brake (hereinafter referred to as an interlock brake lever) includes a rear wheel brake, a master cylinder, etc., and a front wheel brake that operates the front wheel brake hydraulically. It is connected to an operating mechanism (see, for example, Patent Document 1).
JP-A-10-167154

  However, in the conventional brake device, since the front wheel brake operation mechanism is disposed away from the interlocking brake lever, an operation force transmission loss is likely to occur in the operation force transmission path from the interlocking brake lever to the front wheel brake operation mechanism. It was.

  For example, in the brake device described in Patent Document 1, the front wheel brake operation mechanism is disposed on the opposite side of the left and right sides of the handle from the interlock brake lever, and the operating force of the interlock brake lever reaches the front wheel brake operation mechanism via a cable. It was transmitted. Therefore, a transmission loss due to friction between the inner cable and the outer cable has occurred.

  The present invention has been made in view of the above problems, and one of its purposes is a brake device capable of reducing a transmission loss in a transmission path of an operating force from an interlocking brake lever to a front wheel brake operating mechanism, and The object is to provide a straddle-type vehicle.

  In order to solve the above problems, a brake device according to the present invention includes a front wheel brake lever provided on one side of a handle, an interlock brake lever provided on the other side of the handle and connected to a rear wheel brake, The front wheel is disposed adjacent to the interlocking brake lever on the other side of the steering wheel, and hydraulic pressure is generated in a hydraulic pressure path connected to the front wheel brake by operating force of the front wheel brake lever or the interlocking brake lever. A front wheel brake actuation mechanism for actuating a brake, and the operating force of the front wheel brake lever is transmitted from the one side of the handle to the other side. And an operating force transmission member that inputs to the front wheel brake actuation mechanism.

  A straddle-type vehicle according to the present invention includes the brake device.

  ADVANTAGE OF THE INVENTION According to this invention, the brake device which can reduce the transmission loss in the transmission path | route of the operating force from an interlocking brake lever to a front-wheel brake action mechanism is realizable. The straddle-type vehicle is, for example, a motorcycle (including a scooter), a four-wheel buggy, or the like.

  In one aspect of the present invention, play may be provided between the interlocking brake lever and the front wheel brake operating mechanism for delaying transmission of an operating force from the interlocking brake lever to the brake operating mechanism. According to this aspect, when operating the interlocking brake lever, the rear wheel brake can be operated earlier than the front wheel brake.

  In one aspect of the present invention, the front wheel brake operating mechanism receives an operation force of a master cylinder and the front wheel brake lever or the interlocking brake lever, and presses the master cylinder by the operation force to press the hydraulic pressure path. And an arm for generating hydraulic pressure, and the arm is configured to be displaceable with respect to the operating force transmission member when an operating force is input from the interlocking brake lever to the arm. According to this aspect, when the interlocking brake lever is operated, it is possible to suppress the operation force from being transmitted to the front wheel brake lever side.

  Further, in one aspect of the present invention, the rear wheel brake cable that transmits the operating force of the interlock brake lever to the rear wheel brake, and the rear wheel brake cable is pulled by receiving the operation force of the interlock brake lever. And an input member for inputting the operating force to the front wheel brake operating mechanism, and the input member may be attached to the interlocking brake lever.

  Further, in this aspect, the input member is provided so as to be displaceable by a reaction force received from the front wheel brake operating mechanism when the interlocking brake lever is operated, and the rear wheel brake cable is received by the input member. The input member suppresses the displacement of the input member against the reaction force, and the input member applies the operation force of the interlocking brake lever to the front wheel brake operation mechanism against the reaction force while the displacement is suppressed. You may enter. This prevents the operating force of the interlocking brake lever from being input from the input member to the front wheel brake lever operating mechanism when the rear wheel brake cable is missing.

  Further, in this aspect, the input member includes a supported portion supported by the rear wheel brake cable, and an operation force input portion that inputs an operation force of the interlock brake lever to the front wheel brake operation mechanism. The rotational displacement is suppressed by being attached to the interlocking brake lever so as to be capable of rotational displacement, and the supported portion is supported by the rear wheel brake cable, and the operation force input portion from the center of the rotational displacement of the input member. May be smaller than the distance from the center to the supported portion. In this way, it is possible to increase the operating force input from the interlocking brake lever to the front wheel brake operating mechanism via the input member.

  Further, in this aspect, the input member is an equalizer, and the equalizer is provided with a rotation supported portion that is rotatably supported by the interlocking brake lever, and a position separated from the rotation supported portion. A cable attached portion that pulls the brake cable, and an operation force input portion that is provided at a position away from the rotation supported portion and that inputs an operation force of the interlocking brake lever to the front wheel brake operation mechanism. . Thereby, the operating force of the interlocking brake lever is distributed by the equalizer into the force input to the front wheel brake via the front wheel brake operating mechanism and the force input to the rear wheel brake via the rear wheel brake cable. The change of the distribution ratio can be suppressed. In this case, the rotation supported portion of the input member may be provided between the operation force input portion and the cable attached portion.

  In one aspect of the present invention, an input member that inputs the operating force of the interlocking brake lever to the front wheel brake operating mechanism, and a force in a direction opposite to the direction in which the input member inputs the operating force of the interlocking brake lever And an urging member for adding to the front wheel brake operating mechanism. According to this aspect, the operation force of the interlocking brake lever can be delayed from being transmitted from the front wheel brake operation mechanism to the front wheel brake, and the rear wheel brake can be operated earlier than the front wheel brake.

  In one aspect of the present invention, the operating force transmission member is a rod extending from the one side of the handle to the other side. Since the rod does not expand as time passes, the use of the rod as the operating force transmission member eliminates the need for length adjustment work by the user and a mechanism therefor, and improper adjustment by the user. Can be prevented. For example, the operation force transmission member can be prevented from being adjusted by the user to such a length that the front wheel brake operation mechanism always generates the hydraulic pressure in the hydraulic pressure path.

  In this aspect, the rod is connected to the front wheel brake operating mechanism and a connecting portion provided on the front wheel brake lever, and the rod is connected to a distance between the front wheel brake operating mechanism and the connecting portion. An adjusting mechanism for adjusting the angle may be provided. Thereby, the distance between the connecting portion and the front wheel brake operation mechanism can be set to an appropriate size. Further, the front wheel brake lever is generally supported at a position away from the handle. By adjusting the distance between the connecting portion of the front wheel brake lever and the front wheel brake operating mechanism, the distance between the handle and the front wheel brake lever can be set to an appropriate size.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a motorcycle 1 including a brake device 10 as an example of an embodiment of the present invention, FIG. 2 is a front view of the motorcycle 1, and FIG. 3 shows a configuration of the brake device 10. FIG.

  As shown in FIGS. 1 and 2, the motorcycle 1 includes a front wheel 2, a rear wheel 3, a handle 4, and an engine 8 in addition to the brake device 10. Further, as shown in FIG. 3, the brake device 10 generates the operating force of the front wheel brake 14, the rear wheel brake 17, the interlock brake lever 40, the front wheel brake lever 20, the interlock brake lever 40 or the front wheel brake lever 20. A front wheel brake operating mechanism 30 that receives and operates the front wheel brake 14 and a transmission cable 21 that transmits the operating force of the front wheel brake lever 20 to the front wheel brake operating mechanism 30 are included.

  A front wheel 2 is disposed at the front of the motorcycle 1, and the front wheel 2 is rotatably supported by a pair of left and right front suspensions 5a and 5a. As shown in FIG. 2, an under bracket 6a is attached to the upper portions of the front suspensions 5a and 5a, and the under bracket 6a is stretched over the front suspensions 5a and 5a. A lower end portion of a steering shaft 7 extending obliquely upward is attached to the under bracket 6a. A top bridge 6 b is attached to the upper end portion of the steering shaft 7. The top bridge 6b is suspended over a pair of fork pipes 5b and 5b connected to the front suspensions 5a and 5a. A handle 4 extending in the left-right direction (the direction indicated by B in FIG. 2) is attached to the top bridge 6 b via a pair of attachment members 9. Grips 4 a and 4 b are attached to the left and right ends of the handle 4.

  The engine 8 is, for example, a unit swing type engine, and is provided so as to be able to swing up and down together with the rear wheel 3 disposed at the rear part of the motorcycle 1 as shown in FIG. A driving force transmission mechanism 8 a that transmits the driving force output from the engine 8 to the rear wheel 3 is disposed behind the engine 8. A rear wheel brake 17 is disposed on the inner side in the vehicle width direction of the rear portion of the driving force transmission mechanism 8a.

  In the example described here, the rear wheel brake 17 is a mechanical drum brake. As shown in FIG. 3, the rear wheel brake 17 includes a brake drum 17c that rotates together with the rear wheel 3, and a pair of brake shoes 17a and 17a disposed inside the brake drum 17c. A cam 17b that is rotatably supported is disposed between the pair of brake shoes 17a and 17a. A rotating shaft 17d of the cam 17b is attached to one end of the link member 13. The other end 13 a of the link member 13 is connected to the interlocking brake lever 40 via the rear wheel brake cable 11.

  When the interlocking brake lever 40 rotates to the grip 4b side (near side) by the passenger's brake operation, the interlocking brake lever 40 pulls the rear wheel brake cable 11. The link member 13 rotates about the rotation shaft 17d of the cam 17b as a fulcrum when the rear wheel brake cable 11 is pulled. As a result, the cam 17b presses the pair of brake shoes 17a, 17a against the inner wall of the brake drum 17c rotating together with the rear wheel 3, and brakes the rear wheel 3 by their frictional force.

  The rear wheel brake cable 11 includes an inner cable 11a made of a wire or the like, and an outer cable 11b that covers the inner cable 11a. As shown in FIG. 1, the rear wheel brake cable 11 extends downward from the interlocking brake lever 40 located in front of the grip 4 b, and then extends rearward at the lower part of the motorcycle 1. The rear end portion of the inner cable 11 a is attached to the link member 13. A coil spring 11c that pulls the inner cable 11a toward the rear wheel brake 17 is provided at the rear end of the rear wheel brake cable 11.

  In the example described here, the front wheel brake 14 is a hydraulic disc brake, and includes a brake disc 15 and a caliper 16. The brake disc 15 is rotatably supported by the lower end portion of the front suspension 5 a and rotates together with the front wheel 2. The caliper 16 includes a brake pad 16a (see FIG. 3). The brake pad 16a is pressed against the brake disc 15 by the hydraulic pressure transmitted via the hydraulic path 12, and thereby a braking force for the front wheel 2 is generated. The hydraulic path 12 includes, for example, a hydraulic hose and a pipe. The hydraulic path 12 is connected to a master cylinder 32 which will be described later, and transmits the hydraulic pressure generated in the master cylinder 32 to the front wheel brake 14 by the operation of the interlocking brake lever 40 or the front wheel brake lever 20.

  As shown in FIG. 3, the front wheel brake lever 20 is provided on the right side of the handle 4 and is positioned in front of the grip 4a. The front wheel brake lever 20 is attached to the handle 4 by an attachment member 23 and is rotatably supported by the attachment member 23.

  More specifically, a rotation supported portion 20c is formed at the base portion (center side in the vehicle width direction) of the front wheel brake lever 20. The rotation supported portion 20c and the attachment member 23 are provided with holes at positions corresponding to each other, and pivot members (for example, bolts) 24 are inserted through these holes. Accordingly, the front wheel brake lever 20 is rotatably provided with the pivot member 24 as a fulcrum.

  Further, the front wheel brake lever 20 has a gripped portion 20a that extends in the left-right direction and is gripped by a passenger during a brake operation. A cable attached portion 20b is provided at the base of the grasped portion 20a. One end of the transmission cable 21 is attached to the cable attached portion 20b. The transmission cable 21 is provided from the right side to the left side of the handle 4, transmits the operating force of the front wheel brake lever 20 from the right side to the left side of the handle 4 and inputs it to the front wheel brake operating mechanism 30. The above-mentioned rotation supported portion 20c is formed so as to protrude from the cable attached portion 20b to the grip 4a side.

  Here, the interlocking brake lever 40 and the front wheel brake operating mechanism 30 will be described. As shown in FIG. 3, the interlocking brake lever 40 is provided on the left side of the handle 4 and is positioned in front of the grip 4b. In the example described here, the interlocking brake lever 40 is attached to the handle 4 via a master cylinder 32 provided in the front wheel brake operation mechanism 30, and is rotatably supported by the master cylinder 32 (see FIG. 4). The front wheel brake operation mechanism 30 includes an arm 31 made of a rigid material (for example, metal) in addition to the master cylinder 32. The arm 31 receives the operating force of the front wheel brake lever 20 or the interlocking brake lever 40, presses the master cylinder 32 with the operating force, generates hydraulic pressure in the hydraulic path 12, and operates the front wheel brake 14.

  The interlocking brake lever 40 is attached with a rotating member 42 made of a rigid material (for example, metal). The rotating member 42 is provided so as to be able to be rotationally displaced by receiving a reaction force from the arm 31 when the interlocking brake lever 40 is operated, that is, to be retractable. The rotating member 42 will be described in detail later.

  4 is a perspective view of the interlocking brake lever 40 and the front wheel brake operating mechanism 30 viewed obliquely from above. FIG. 5 is a plan view of the interlocking brake lever 40 and the front wheel brake operating mechanism 30. FIG. 7 is a bottom view of the lever 40 and the front wheel brake operating mechanism 30, FIG. 7 is a perspective view of the interlocking brake lever 40, FIG. 8 is a perspective view of the master cylinder 32, and FIG. 9 is a perspective view of the rotating member 42. It is. FIG. 10 is a plan view of the rotating member 42. In FIG. 4, the description of the handle 4 and the grip 4b is omitted, and in FIGS. 5 and 6, these are indicated by a two-dot chain line.

  First, the interlocking brake lever 40 will be described in detail. As shown in FIG. 7, the interlocking brake lever 40 has a gripped portion 40 e that extends in the left-right direction and is gripped by the passenger during a brake operation. A pair of upper and lower plate-like base portions 40c and 40d are provided at the end of the gripped portion 40e on the center side in the vehicle width direction. The base portions 40c and 40d have rotation supported portions 40a and 40a, and holes 40g and 40g are formed at positions corresponding to the rotation supported portions 40a and 40a. As shown in FIG. 8, holes 32b and 32b are formed in the master cylinder 32, and the positions of the holes 32b and 32b correspond to the positions of the holes 40g and 40g. A pivotal support member (bolt here) 43 is inserted through the holes 32b, 32b and the holes 40g, 40g (see FIG. 4 or FIG. 6). Thereby, the interlocking brake lever 40 can rotate with the pivot member 43 as a fulcrum. As shown in FIG. 6, a nut 44 is fitted to the distal end portion of the pivot member 43 via a washer 45.

  Further, as shown in FIG. 7, the base portions 40 c and 40 d are rotation support portions 40 b that rotatably support the rotation member 42 at positions away from the rotation supported portions 40 a and 40 a in the forward direction (in the direction away from the handle 4). , 40b. Specifically, the rotation support portions 40b and 40b are also formed with holes 40h and 40h at positions facing each other. Further, the rotating member 42 is also formed with holes 42g at positions corresponding to the holes 40h, 40h (see FIG. 9). As shown in FIG. 4, a rotating member 42 is disposed between a pair of upper and lower base portions 40c and 40d, and a pivot member (here, a bolt) 46 is provided in the hole 42g of the rotating member 42 and the holes 40h and 40h. It is inserted. Thereby, the rotation support parts 40b and 40b are supporting the rotation member 42 rotatably. As shown in FIG. 6, a washer 47 is fitted to the distal end portion of the pivot member 46. Further, a retaining member (in this case, a split pin) 48 is inserted through the distal end portion, and the pivot member 46 is secured to the interlocking brake lever 40 by the retaining member 48.

  Also, as shown in FIG. 6 or FIG. 7, the base 40d is provided with a stopper 40f protruding downward. On the other hand, as shown in FIGS. 5 to 8, the master cylinder 32 is provided with a rotation restricting portion 32c protruding forward, and this rotation restricting portion 32c is in a non-operating state (the rotation operation of the interlocking brake lever 40 is performed). The interlocking brake lever 40 is in a position corresponding to the stopper 40f of the interlocking brake lever 40. The rotation restricting portion 32c restricts the rotation of the interlocking brake lever 40 by contacting the stopper 40f when the interlocking brake lever 40 is not operated.

  Next, the rotating member 42 will be described. As shown in FIG. 5 or FIG. 9, the rotating member 42 is a member arranged so as to extend from the rotation support portion 40b to the center side in the vehicle width direction (the direction indicated by C in FIG. 5), and the rotation supported portion 42a. The cable attached portion 42b and the arm pressing portion 42c are provided.

  The rotation supported portion 42a is located at one end of the rotation member 42, and the rotation supported portion 42a is formed with the above-described hole 42g.

  A cable attached portion 42b is provided at a position away from the rotation supported portion 42a toward the center in the vehicle width direction. The end of the rear wheel brake cable 11 is attached to the cable attached portion 42b. In the example described here, as shown in FIG. 6, a cylindrical engagement portion 11 d is provided at the one end portion of the inner cable 11 a. On the other hand, the cable attached portion 42b is formed with a recess for accommodating the cylindrical engaging portion 11d, and the engaging portion 11d and the cable attached portion 42b are engaged with each other. As shown in FIG. 9, a cutout 42e is formed in the cable attached portion 42b. The inner cable 11a extends toward the center in the vehicle width direction through the notch 42e.

  The arm pressing portion 42c is formed at a position facing a lever side pressed portion 31c of the arm 31 described later. In the example described here, as shown in FIG. 5, the arm pressing portion 42c is formed so as to protrude from the rotation supported portion 42a toward the grip 4b.

  As described above, the rotation member 42 is provided so as to be rotatable about the pivot member 46 as a fulcrum. When the interlock brake lever 40 is operated, the rear wheel brake cable 11 restricts the rotation (retreat) of the rotating member 42 against the reaction force received by the rotating member 42 from the arm 31. The rotating member 42 inputs the operating force of the interlocking brake lever 40 to the arm 31 against the reaction force in a state where the rotation is restricted. That is, the cable attached portion 42b is pulled toward the center in the vehicle width direction by the inner cable 11a, thereby restricting the rotation of the rotating member 42. When the interlocking brake lever 40 is operated, the rotating member 42 is supported on the arm 31 side by the inner cable 11a, and the arm pressing portion 42c applies the operating force of the interlocking brake lever 40 against the reaction force received from the arm 31. Input to the arm 31.

  Also, as shown in FIG. 10, the distance L1 from the center P of the hole 42g provided in the rotation supported portion 42a to the arm pressing portion 42c is smaller than the distance L2 from the center P to the cable attached portion 42b. ing. Thereby, the force input from the rotating member 42 to the arm 31 can be increased.

  Next, the front wheel brake operation mechanism 30 will be described. As shown in FIGS. 2 to 3, the front wheel brake operating mechanism 30 is disposed adjacent to the interlocking brake lever 40 on the left side (the interlocking brake lever 40 side) of the handle 4. That is, the front wheel brake actuation mechanism 30 is provided on the center side in the vehicle width direction of the interlocking brake lever 40 (the direction indicated by A in FIG. 3). As described above, the front wheel brake actuation mechanism 30 includes the arm 31 and the master cylinder 32. FIG. 11 is a perspective view of the arm 31.

  As shown in FIG. 4 or FIG. 8, the master cylinder 32 has a pressed portion 32a, a mounting portion 32f, and a pair of upper and lower lever support portions 32d and 32d.

  The attachment portion 32f has a semicircular shape, and sandwiches a portion located inside the grip 4b of the handle 4 together with the semicircular attachment member 33, whereby the master cylinder 32 is attached to the handle 4 (FIG. 5). Or refer to FIG.

  The pressed portion 32a is pressed by a cylinder pressing portion 31a of an arm 31 described later and presses a piston (not shown) accommodated in the master cylinder 32 when a passenger performs a braking operation. Then, the pressed part 32 a generates hydraulic pressure in the brake oil in the hydraulic path 12 and operates the front wheel brake 14. In the example described here, the end surface of the pressed portion 32a faces the vehicle width direction side (the direction opposite to the direction indicated by A in FIG. 3) and faces the cylinder pressing portion 31a of the arm 31. (See FIG. 5). The pressed portion 32a is urged laterally in the vehicle width direction by a spring (not shown) housed in the master cylinder 32.

  The lever support portions 32d and 32d rotatably support the interlocking brake lever 40 and the arm 31. In the example described here, the rotation supported portions 40a and 40a of the interlock brake lever 40 are disposed between the pair of upper and lower lever support portions 32d and 32d, and will be described later between the rotation supported portions 40a and 40a. A rotation supported portion 31d of the arm 31 is disposed (see FIG. 11). The lever supports 32d and 32d are provided with the above-described holes 32b and 32b (see FIG. 8). The pivot member 43 is inserted into the holes 32b and 32b, the holes 40g and 40g of the interlocking brake lever 40, and the hole 31b of the arm 31 described later. Thereby, the interlocking brake lever 40 and the arm 31 are rotatably supported by the lever support portions 32d and 32d. A washer 44 and a nut 45 are fitted to the end of the pivot member 43 (see FIG. 6).

  As shown in FIG. 8, the master cylinder 32 includes a reservoir tank 32e, a transmission cable support portion 32g (see FIG. 6), a rear wheel brake cable support portion 32h, A hydraulic path connecting portion 32i is provided.

  The reservoir tank 32e is provided in the upper part of the master cylinder 32 and holds replenishment brake oil. The reservoir tank 32e supplies brake oil to the hydraulic path 12 when the brake pad 16a is worn, for example. The transmission cable support 32g is formed at the lower part of the master cylinder 32 and holds the end of the outer cable 21b of the transmission cable 21 (see FIG. 6). The rear wheel brake cable support portion 32 h holds the end portion of the outer cable 11 b of the rear wheel brake cable 11. The hydraulic path 12 is connected to the hydraulic path connecting portion 32i (see FIG. 6).

  As shown in FIG. 6, a stop lamp switch 35 connected to the stop lamp of the motorcycle 1 via a lead wire (not shown) is attached to the lower surface of the master cylinder 32. When the interlock brake lever 40 is not operated, the stop lamp switch 35 is pressed by the stopper 40f of the interlock brake lever 40 and is in an off state, and is turned on when the passenger performs a brake operation and the stopper 40f is released.

  Next, the arm 31 will be described. As shown in FIG. 11, the arm 31 includes a cylinder pressing portion 31a, a rotation supported portion 31d, a lever side pressed portion 31c, and a towed portion 31e.

  A hole 31b is formed in the central portion of the rotation supported portion 31d, and the pivot member 43 is inserted into the hole 31b as described above. When an operating force is input from the interlock brake lever 40 or the front wheel brake lever 20, the arm 31 rotates with the pivot member 43 as a fulcrum, and the cylinder pressing portion 31 a presses the pressed portion 32 a of the master cylinder 32.

  The arm 31 has a projecting portion 31f extending sideways from the rotation supported portion 31d. A side surface of the overhang portion 31f faces the arm pressing portion 42c of the rotating member 42, and the side surface serves as a lever-side pressed portion 31c (see FIG. 5).

  Between the interlocking brake lever 40 and the arm 31, a play for delaying the transmission of the operation force from the interlocking brake lever 40 to the brake operating mechanism 30 is provided. In this example, as shown in FIG. 5, when the interlocking brake lever 40 is in a non-operating state, a gap h is provided as play between the lever-side pressed portion 31c and the arm pressing portion 42c of the rotating member 42. .

  The cylinder pressing portion 31a is provided on the opposite side of the lever-side pressed portion 31c with the rotation supported portion 31d interposed therebetween. Specifically, the arm 31 has a protruding portion 31g that protrudes laterally from the rotation supported portion 31d, and a cylinder is formed on the side surface of the protruding portion 31g that faces the pressed portion 32a of the master cylinder 32. A pressing part 31a is provided. Note that the distance from the center of the hole 31b to the cylinder pressing portion 31a is shorter than the distance from the center to the lever side pressed portion 31c. Further, the overhanging portion 31f, the rotation supported portion 31d, and the overhanging portion 31g have a thick plate shape.

  The towed portion 31e is provided at a position spaced apart from the overhanging portion 31f, the rotation supported portion 31d, and the overhanging portion 31g in the vertical direction (the direction indicated by D in FIG. 11), and the vertical direction with respect to the overhanging portion 31g. Opposite to.

  A towed portion 21c provided at an end of the inner cable 21a of the transmission cable 21 is hooked on the towed portion 31e (see FIG. 4). The towing portion 21c pulls the towed portion 31e when the front wheel brake lever 20 is operated, and transmits the movement of the front wheel brake lever 20 to the front wheel brake operating mechanism 30, and when the interlocking brake lever 40 is operated, the towed portion The movement of the interlocking brake lever 40 is separated from the portion 31e and is not transmitted to the front wheel brake lever 20 side.

  Specifically, as shown in FIG. 4, the pulling portion 21 c includes a base portion 21 d and a pair of plate portions 21 e and 21 e that rise from the base portion 21 d. The plates 21e and 21e are formed with holes 21f and 21f that are long in the moving direction of the towed portion 31e when the interlocking brake lever 40 is operated (see FIGS. 4 and 6). On the other hand, a hole 31h is provided in the center of the to-be-towed part 31e as shown in FIG. The to-be-towed part 31e is arrange | positioned between a pair of board parts 21e and 21e, and the pin 22 is penetrated by the hole 31h and the holes 21f and 21f. The towed portion 31e is engaged with the towing portion 21c by the pin 22. Thus, the arm 31 can be displaced relative to the transmission cable 21 when an operating force is input from the interlocking brake lever 40 to the arm 31 (when the interlocking brake lever 40 is operated). That is, the to-be-towed part 31e moves relatively with respect to the inner cable 21a between the plate parts 21e and 21e together with the pin 22. As a result, even when the interlocking brake lever 40 is operated, the movement is not transmitted to the front wheel brake lever 20 side.

  As shown in FIG. 6, a washer 25 is fitted to the tip of the pin 22. Further, a retaining member (in this case, a split pin) 26 is inserted from the outside of the washer 25 at the tip of the pin 22, and this retaining member 26 prevents the pin 22 from falling off from the traction portion 21c. Yes. A coil spring 28 is disposed between the base portion 21d of the pulling portion 21c and the transmission cable support portion 32g to apply a force in the direction of increasing the distance between the base portion 21d and the transmission cable support portion 32g. The coil spring 28 is disposed so as to surround the inner cable 21a. A tube 27 having an outer diameter corresponding to the inner diameter of the coil spring 28 is attached to the inner cable 21a. The tube 27 stabilizes the position of the coil spring 28 with respect to the inner cable 21a, and prevents the coil spring 28 from rattling.

  Moreover, as shown in FIG. 11, the to-be-towed part 31e and the overhang | projection part 31g are connected by the column part 31i extended | stretched to an up-down direction. Further, the arm 31 is always urged so that the cylinder pressing portion 31 a contacts the pressed portion 32 a of the master cylinder 32. In the example described here, as shown in FIG. 6, a torsion spring 34 is stretched over the column portion 31 i and the pivot member 43, and the torsion spring 34 moves the column portion 31 i to the master cylinder 32 side. It is drawing.

  Here, the operation of the brake device 10 will be described. 12 and 13 are views for explaining the operation of the brake device 10 when the interlocking brake lever 40 is operated. FIG. 14 is a diagram illustrating a state where the towed portion 31 e of the arm 31 moves between the plate portions 21 e and 21 e of the transmission cable 21 at that time. FIG. 15 is a view for explaining the operation of the brake device 10 when the front wheel brake lever 20 is operated. First, the operation of the brake device 10 when the interlocking brake lever 40 is operated will be described.

  As described above, in the initial state (the state where the brake operation is not performed), as shown in FIG. 5, the arm pressing portion 42 c of the rotating member 42 is separated from the lever-side pressed portion 31 c of the arm 31 by the gap h. ing.

  As shown in FIG. 12, when the operation of the interlocking brake lever 40 by the passenger starts, the interlocking brake lever 40 starts to rotate toward the grip 4b with the pivot member 43 as a fulcrum. As a result, first, the inner cable 11a of the rear wheel brake cable 11 is pulled by the rotating member 42, and the operation of the rear wheel brake 17 is started. At this time, since the arm pressing portion 42c of the rotating member 42 and the lever side pressed portion 31c of the arm 31 are in contact with each other, the arm 31 is not rotating and the operation of the front wheel brake 14 has started. Absent.

  Thereafter, as shown in FIG. 13, when the passenger continues to operate the interlocking brake lever 40 and the interlocking brake lever 40 rotates toward the grip 4b with the pivot member 43 as a fulcrum, the arm pressing portion 42c of the rotating member 42 is Then, the lever side pressed portion 31c of the arm 31 is pressed. As a result, the arm 31 also rotates about the pivot member 43 as a fulcrum, and the cylinder pressing portion 31 a presses the pressed portion 32 a of the master cylinder 32. As a result, the front wheel brake 14 starts to operate.

  At this time, as shown in FIG. 14, the pin 22 moves along the holes 21f and 21f provided in the plate portions 21e and 21e of the transmission cable 21, and the position of the traction portion 21c does not change and the arm 31 is covered. The pulling portion 31 e moves between the plate portions 21 e and 21 e of the transmission cable 21. This prevents the operation from being transmitted to the front wheel brake lever 20 when the interlocking brake lever 40 is operated.

  In addition, as described above, the distance L1 from the rotational displacement center P of the rotating member 42 to the arm pressing portion 42c is smaller than the distance L2 from the center P to the cable attached portion 42b (see FIG. 10). As a result, the pressing force of the arm pressing portion 42c against the lever-side pressed portion 31c increases, and the arm 31 resists the reaction force received from the lever-side pressed portion 31c without significantly rotating (retracting) the rotating member 42. Can be rotated.

  Next, the operation of the brake device 10 when the front wheel brake lever 20 is operated will be described.

  When the front wheel brake lever 20 is operated by the occupant, the front wheel brake lever 20 pulls the transmission cable 21, and the traction part 21 c pulls the to-be-towed part 31 e of the arm 31. As a result, as shown in FIG. 15, the arm 31 rotates with the pivot member 43 as a fulcrum, and the cylinder pressing portion 31 a presses the pressed portion 32 a of the master cylinder 32. As a result, the front wheel brake 14 operates. At this time, the arm pressing portion 42c of the rotating member 42 and the lever side pressed portion 31c of the arm 31 are further separated from the initial state.

  Finally, the operation of the brake device 10 when the inner cable 11a of the rear wheel brake cable 11 is cut or detached from the rotating member 42 will be described. FIG. 16 is a view for explaining the operation of the brake device 10 when the inner cable 11 a is detached from the rotating member 42.

  When the passenger operates the interlock brake lever 40 with the inner cable 11a detached from the rotation member 42, the interlock brake lever 40 rotates toward the grip 4b with the pivot member 43 as a fulcrum as shown in FIG. To do. At this time, the arm pressing portion 42c of the rotating member 42 contacts the lever-side pressed portion 31c of the arm 31, but the rotating member 42 rotates (retreats) with the pivot member 46 as a fulcrum. The lever-side pressed portion 31c cannot be pressed against the extension force of the spring accommodated in the lever. This prevents only the front wheel brake 14 from operating when the interlock brake lever 40 is operated in a state where the inner cable 11a is detached from the rotating member 42.

  In the brake device 10 described above, the front wheel brake operation mechanism 30 is disposed adjacent to the interlocking brake lever 40. As a result, the interlock brake lever and the front wheel brake operation mechanism are separated from each other, and the operation of the interlock brake lever is transmitted from the interlock brake lever 40 to the front wheel brake operation mechanism via a wire or the like. The operating force transmission loss in the operating force transmission path to the mechanism 30 can be reduced.

  The present invention is not limited to the brake device 10 described above, and various modifications are possible. For example, in the above description, the rear wheel brake cable 11 is connected to the interlocking brake lever 40 via the rotating member 42. However, the rear wheel brake cable may be directly connected to the interlocking brake lever. FIG. 17 is a plan view of a brake device 10A that is an example of the brake device according to this embodiment. In FIG. 17, the same portions as those described above are denoted by the same reference numerals and description thereof is omitted.

  The brake device 10A includes an interlocking brake lever 40A and a rotating member 42A. The interlocking brake lever 40A includes a cable attachment portion 40k, and the engagement portion 11d of the rear wheel brake cable 11 is hooked on the cable attachment portion 40k. The tension by the coil spring 11c is acting on the inner cable 11a of the rear wheel brake cable 11 (see FIG. 1). The interlocking brake lever 40A has a rotation support portion 40L. The rotation support portion 40L is positioned between the cable attachment portion 40k and the lever-side pressed portion 31c of the arm 31, and rotatably supports the rotation member 42A. Here, the rotation member 42A has a rotation supported portion 42h, and a pivot member (for example, a bolt) 46 is inserted through the rotation supported portion 42h and the rotation support portion 40L of the interlocking brake lever 40A. The rotating member 42A has a cable side supported portion 42i. The cable-side supported portion 42i is in contact with the inner cable 11a where tension is applied. Thereby, the rotation (retreat) of the rotating member 42A in the direction opposite to the side where the arm 31 is located is restricted.

  The operation of the brake device 10A will be described. When the interlocking brake lever 40A rotates to the near side (grip 4b side) by the passenger's brake operation, the arm pressing portion 42c of the rotating member 42A presses the lever side pressed portion 31c of the arm 31, and the lever side A reaction force is received from the pressed portion 31c. The inner cable 11a of the rear wheel brake cable 11 is in contact with the cable-side supported portion 42i, and against the reaction force received by the rotating member 42A from the arm 31, the rotating member 42A is moved to the lever-side supported portion 31c side of the arm 31. To support. The rotating member 42A is supported by the inner cable 11a so as to press the lever-side pressed portion 31c without rotating in the opposite direction (the direction indicated by E in FIG. 17) and to apply the operating force of the interlocking brake lever 40A. Input to the arm 31.

  Next, the operation of the brake device 10A in a state where the inner cable 11a is cut will be described. In a state where the inner cable 11a is cut, the rotation member 42A is allowed to rotate in the direction opposite to the side where the arm 31 is located. As a result, similarly to the case described with reference to FIG. 16, when the occupant rotates the interlocking brake lever 40 </ b> A toward the front side, the arm pressing portion 42 c of the rotating member 42 </ b> A is released from the lever side supported portion 31 c of the arm 31. Due to the reaction force, the rotating member 42A cannot resist the reaction force and rotates to the side opposite to the lever-side supported portion 31c (the direction indicated by E in FIG. 17). Accordingly, it is possible to prevent only the front wheel brake 14 from operating when the interlocking brake lever 40A is operated in a state where the inner cable 11a is disconnected. The above is the description of the operation of the brake device 10A.

  In the brake device 10 described above, a gap h is provided between the lever-side pressed portion 31c of the arm 31 and the arm pressing portion 42c of the rotating member 42 (see FIG. 5). Accordingly, when the interlocking brake lever 40 is operated, the operation of the front wheel brake 14 is started after the operation of the rear wheel brake 17. However, the mechanism for delaying the operation of the front wheel brake 14 is not limited to this. For example, the operation of the front wheel brake 14 may be delayed by applying a force in the direction opposite to the direction in which the arm 31 moves by operating the interlocking brake lever 40 to the arm 31 in advance.

  In the brake device 10 described above, the rotating member 42 is used as a member for inputting the operating force of the interlocking brake lever 40 to the arm 31. However, an equalizer may be used as a member that inputs the operating force of the interlocking brake lever 40 to the arm 31.

  FIG. 18 is a plan view of a brake device 10B which is an example of the brake device according to this embodiment. 19 is an exploded perspective view of the equalizer 64 and the arm 61 included in the brake device 10B, FIG. 20 is a plan view of the equalizer 64 and the arm 61, FIG. 21 is an enlarged view of the equalizer 64, and FIG. It is a perspective view which faces the master cylinder 32B with which the apparatus 10B is provided from the front. In these drawings, the same portions as those of the brake device 10 described above are denoted by the same reference numerals, and the description thereof is omitted. In the brake device 10B, the arm 61 and the master cylinder 32B constitute a front wheel brake operation mechanism 30B.

  As shown in FIG. 18, in addition to the equalizer 64 and the arm 61, the brake device 10 </ b> B applies an interlocking brake lever 40 </ b> B and a force in a direction opposite to the direction in which the arm 61 moves during brake operation to the arm 61 in advance. And a force member 65. The arm 61 includes a lever side arm 62 and a cylinder side arm 63 that can rotate independently of the lever side arm 62 (see FIG. 19).

  The cylinder side arm 63 rotates by being pressed by the lever side arm 62 or by being pulled by the transmission cable 21 described above, and presses the pressed portion 32a of the master cylinder 32B. As shown in FIG. 19, the cylinder side arm 63 has a cylinder pressing part 63a, a pair of upper and lower rotating supported parts 63d, 63d, a pressed part 63c, and a towed part 63e. The lever side arm 62 includes a rotation supported portion 62d, a lever side pressed portion 62c, a pressing portion 62a, a stopper 62e, and an urging member attaching portion 62f.

  As shown in FIG. 20, the pressing portion 62 a of the lever side arm 62 faces the pressed portion 63 c of the cylinder side arm 63, and when the lever side pressed portion 62 c of the lever side arm 62 is pressed by the equalizer 64. Then, the pressed part 63c is pressed. As a result, the lever side arm 62 and the cylinder side arm 63 rotate integrally.

  The lever-side pressed portion 62 c of the lever-side arm 62 is attracted to the equalizer 64 side by the urging member 65 and hits the arm pressing portion 64 c of the equalizer 64. In this example, the urging member 65 is an elastic member (for example, a spring) having a contracting force, and is stretched between the lever side arm 62 and the master cylinder 32B (see FIG. 18). Specifically, the urging member attaching portion 62f of the lever side arm 62 is a protrusion protruding upward from the lever side pressed portion 62c (see FIG. 19), and the urging member 65 is connected to the urging member attaching portion 62f. Is attached to one end. The master cylinder 32B is formed with an urging member mounting portion 32j. As shown in FIG. 22, in the master cylinder 32B, an urging member attachment portion 32j is formed in the middle portion of the rear wheel brake cable support portion 32h extending forward. Here, the urging member attaching portion 32j is a protrusion protruding upward, and the other end of the urging member 65 is attached to the urging member attaching portion 32j. The urging member 65 pulls the urging member attaching portion 62f of the lever side arm 62 in a direction opposite to the direction in which the lever side arm 62 moves during the brake operation.

  As shown in FIGS. 18 and 22, the master cylinder 32 </ b> B has a positioning portion 32 k that slightly protrudes forward at a position facing the stopper 62 e of the lever side arm 62. The stopper 62e is in contact with the positioning portion 32k (see FIG. 18), restricts the rotation of the lever side arm 62 pulled by the biasing member 65, and determines the position of the lever side arm 62.

  The cylinder pressing part 63a of the cylinder side arm 63, the rotation supported parts 63d and 63d, and the towed part 63e are respectively the cylinder pressing part 31a, the rotation supported part 31d, and the towed part 31e of the arm 31 described above. It is almost the same. That is, the cylinder pressing portion 63a is in contact with the pressed portion 32a of the master cylinder 32 and receives the operating force of the interlocking brake lever 40 to press the pressed portion 32a. A rotation supported portion 62d of the lever side arm 62 is disposed between the pair of upper and lower rotation supported portions 63d and 63d. As shown in FIG. 19, holes 63b and 62b are formed in the rotation supported portion 63d and the rotation supported portion 62d of the lever side arm 62, respectively, and the pivot member 43 is formed in the holes 63b and 62b. By being inserted, the lever side arm 62 and the cylinder side arm 63 can rotate around the pivot member 43. The inner cable 21a of the transmission cable 21 is hooked on the to-be-towed portion 63e, and is pulled by the inner cable 21a when the front wheel brake lever 20 is operated. In FIG. 18, the pulling portion 21c attached to the end of the inner cable 21a is omitted, and only the inner cable 21a is indicated by a two-dot chain line.

  As shown in FIG. 19 or FIG. 20, the equalizer 64 includes a rotation supported portion 64a located at the center thereof, a cable attached portion 64b provided at a position away from the rotation supported portion 64a, and a rotation supported portion. The arm pressing part 64c provided in the position away from the support part 64a and the overhang | projection part 64f are provided. Similar to the cable attached portion 42b of the rotating member 42 described above, the engagement portion 11d of the rear wheel brake cable 11 is hooked on the cable attached portion 64b (see FIG. 18 or FIG. 20). The rear wheel brake cable 11 pulls the cable attached portion 64b by the elastic force of the coil spring 11c (see FIG. 1). The rotation supported portion 64a is a hole, and the pivot member 46 is inserted through the hole. The equalizer 64 is rotatable with the pivot member 46 as a fulcrum. As shown in FIG. 20, the projecting portion 64f projects from the rotation supported portion 64a on the side opposite to the cable attached portion 64b. An arm pressing portion 64c is formed on the wall portion of the overhanging portion 64f facing the lever-side pressed portion 62c of the lever-side arm 62. The arm pressing portion 64 c is located on the opposite side of the cable attached portion 64 b across the rotation supported portion 64 a and is in contact with the lever side pressed portion 62 c of the lever side arm 62. When the cable attached portion 64 b is pulled by the rear wheel brake cable 11, a rotational force with the pivot member 46 as a fulcrum acts on the equalizer 64. Therefore, the arm pressing portion 64c presses the lever side pressed portion 62c.

  In the example described here, as shown in FIG. 21, the line connecting the center P1 of the overhanging portion 64f, the center P2 of the rotation supported portion 64a, and the center P3 of the cable attached portion 64b is approximately It is a straight line (straight line L3 in FIG. 21). The inner cable 11a pulls the cable attached portion 64b in a direction substantially perpendicular to the straight line L3 (the direction indicated by V1 in the figure). The arm pressing portion 64c presses the lever-side pressed portion 62c of the lever-side arm 62 in a direction substantially perpendicular to the straight line L3 (the direction indicated by V2 in the figure).

  As shown in FIG. 18, the interlocking brake lever 40B has a stopper 40i that restricts the rotation of the equalizer 64 that exceeds a preset amount. FIG. 23 is a front view of the base portions 40c and 40d of the interlocking brake lever 40B. As shown in the figure, the stopper 40i is a protrusion protruding from the base 40d toward the base 40c. As shown in FIG. 18, the stopper 40i is formed at a position slightly away from the arm pressing portion 64c in the direction in which the arm pressing portion 64c of the equalizer 64 moves when the interlocking brake lever 40B is operated.

  Here, the operation of the brake device 10B will be described. 24 and 25 are diagrams for explaining the operation of the brake device 10B when the interlocking brake lever 40B is operated, and FIG. 26 shows the operation of the brake device 10B when the front wheel brake lever 20 is operated. 27 is a diagram for explaining the operation of the brake device 10B when the inner cable 11a of the rear wheel brake cable 11 is cut, and FIG. It is a figure for demonstrating operation | movement of the brake device 10B when that oil leaks. In these drawings, the master cylinder 32B and the interlocking brake lever 40B are shown in a simplified manner, and the rotation restricting portion 32c of the master cylinder 32B and the stopper 40f of the interlocking brake lever 40B are omitted. Further, the inner cable 11a of the rear wheel brake cable 11 is indicated by a two-dot chain line.

  First, with reference to FIGS. 24 and 25, the operation of the brake device 10B when the interlocking brake lever 40B is operated will be described. As shown in FIG. 24, when the interlocking brake lever 40B is pulled toward the blip 4b and the rotation of the interlocking brake lever 40B starts, the equalizer 64 is moved together with the interlocking brake lever 40B in the vehicle width direction (indicated by W1 in the figure). Start moving in the direction). At this time, the cable attached portion 64b of the equalizer 64 pulls the inner cable 11a of the rear wheel brake cable 11 outward in the vehicle width direction, and the arm pressing portion 64c pushes the lever side pressed portion 62c of the lever side arm 62. Press. As a result, the rear wheel brake 17 starts to operate.

  On the other hand, since the urging member 65 pulls the urging member mounting portion 62f of the lever side arm 62 in advance, the operation of the front wheel brake 14 does not start. That is, the urging member 65 pulls the urging member attaching portion 62 f of the lever side arm 62 in the direction opposite to the direction in which the equalizer 64 presses the lever side arm 62. Therefore, the lever-side arm 62 and the cylinder-side arm 63 do not rotate until the urging force of the urging member 65 and the force by which the arm pressing portion 64c of the equalizer 64 presses the lever-side pressed portion 62c are not rotated. When 40 is initially operated, the front wheel brake 14 does not operate.

  As shown in FIG. 25, when the interlocking brake lever 40B is further pulled toward the grip 4b and the force by which the equalizer 64 pushes the lever side arm 62 exceeds the force of the biasing member 65, the lever side arm 62 and the cylinder side arm 63 and the cylinder pressing portion 63 a of the cylinder side arm 63 presses the pressed portion 32 a of the master cylinder 32. As a result, the front wheel brake 14 is also operated.

  The rotation supported portion 64a of the equalizer 64 supported by the interlocking brake lever 40B is located between the arm pressing portion 64c and the cable attached portion 64b (see FIG. 21). The operating force of the interlocking brake lever 40B is the force input to the rear wheel brake 17 from the cable attached portion 64b (the force by which the cable attached portion 64b pulls the inner cable 11a) and the front wheel brake from the arm pressing portion 64c. 14 (the force with which the arm pressing portion 64c presses the lever side arm 62). The distribution ratio is determined by the ratio between the distance from the center P2 of the rotation supported part 64a to the center P3 of the cable attached part 64b and the distance from the center P2 of the rotation supported part 64a to the arm pressing part 64c. Therefore, the distribution ratio of the equalizer 64 is substantially constant during the rotation of the interlocking brake lever 40B.

  Next, the operation of the brake device 10B will be described with reference to FIG. When the front wheel brake lever 20 is pulled to the grip 4a side (see FIG. 3), the towed portion 63e of the cylinder side arm 63 is moved toward the vehicle width direction center side (direction indicated by W2 in the figure) by the inner cable 21a of the transmission cable 21. ). As a result, as shown in FIG. 26, the cylinder pressing portion 63a of the cylinder side arm 63 presses the pressed portion 32a of the master cylinder 32, and the front wheel brake 14 is activated. At this time, the pressed portion 63c of the cylinder side arm 63 is separated from the pressing portion 62a of the lever side arm 62, and the positions of the lever side arm 62 and the interlocking brake lever 40B are maintained.

  Next, the operation of the brake device 10B will be described with reference to FIG. When the interlocking brake lever 40B is pulled toward the grip 4b while the inner cable 11a of the rear wheel brake cable 11 is cut, the rotation supported portion 64a of the equalizer 64 moves outward in the vehicle width direction. At this time, the equalizer 64 rotates without resisting the reaction force that the arm pressing portion 64 c receives from the lever-side pressed portion 62 c of the lever-side arm 62. As a result, the positions of the lever side arm 62 and the cylinder side arm 63 are maintained. Thus, it is possible to prevent only the front wheel brake 14 from operating when the interlock brake lever 40 is operated in a state where the inner cable 11a of the rear wheel brake cable 11 is disconnected.

  Next, the operation of the brake device 10B will be described with reference to FIG. When the interlocking brake lever 40B is pulled to the grip 4b side in a state where oil in the hydraulic path 12 has leaked, the arm pressing portion 64c of the equalizer 64 is moved to the lever side cover of the lever side arm 62 as in the case shown in FIG. The equalizer 64 pulls only the rear wheel brake cable 11 until the force pressing the pressing portion 62c and the urging force of the urging member 65 are balanced. Thereafter, when the interlocking brake lever 40B is further pulled toward the grip 4b, the reaction force received by the arm pressing portion 64c of the equalizer 64 from the lever-side pressed portion 62c of the lever-side arm 62 exceeds the urging force of the urging member 65. Therefore, the equalizer 64 is pulled by the rear wheel brake cable 11 and rotates. As shown in FIG. 28, the arm pressing portion 64c of the equalizer 64 hits a stopper 40i provided in front of the arm pressing portion 64c in advance, and further rotation of the equalizer 64 is restricted. As a result, the equalizer 64 pulls the rear wheel brake cable 11 further outward in the vehicle width direction, whereby the rear wheel brake 17 further exerts a braking force.

  According to the brake device 10B described above, the equalizer 64 is used as a member for inputting the operation force of the interlocking brake lever 40B to the rear wheel brake 17 and the front wheel brake 14. The equalizer 64 distributes the operating force of the interlocking brake lever 40B to the force input to the rear wheel brake 17 and the force input to the front wheel brake 14, and the distribution ratio is the center of the rotation supported portion 64a of the equalizer 64. To the arm pressing portion 64c and the ratio of the distance to the cable attached portion 64b. Therefore, for example, even when the inner cable 11a is aged and slightly extended, the distribution ratio of the operating force of the interlocking brake lever 40B is not affected by the aging of the inner cable 11a, and the initial ratio Is maintained.

  In the brake devices 10, 10 </ b> A, and 10 </ b> B described above, the operation of the front wheel brake lever 20 by the passenger is transmitted to the interlocking brake lever 40 side by the transmission cable 21. However, the operation of the front wheel brake lever 20 by the passenger may be transmitted to the interlocking brake lever 40 by the rod.

  29 is a schematic view of the brake device 10C according to this embodiment, FIG. 30 is a cross-sectional view taken along line AA in FIG. 29, and FIG. 31 is a cross-sectional view taken along line BB in FIG. 32 is a cross-sectional view taken along the line CC of FIG. In these drawings, the same portions as those described above are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 29, in the brake device 10C, the interlock brake lever 40 described above is provided on the left side of the handle 4, and the front wheel brake lever 20C is provided on the right side. The brake device 10 </ b> C includes a rod 51 as an operation force transmission member that transmits the operation of the front wheel brake lever 20 </ b> C to the front wheel brake operation mechanism 30. The rod 51 is formed of a rigid material (for example, metal). The rod 51 may extend linearly or may be bent slightly in the middle. The rod 51 may be disposed so as not to be exposed to the outside by being covered with a cover that covers the front portion of the vehicle body or disposed behind a meter such as a speedometer.

  The rod 51 is disposed so as to extend from one side of the handle 4 to the other side. And one end is connected with the towed part 31e of the arm 31, and unlike the transmission cable 21 mentioned above, the relative movement of the rod 51 and the towed part 31e is regulated.

  Specifically, as shown in FIG. 30, a connecting tool 52 that connects the one end and the to-be-towed portion 31 e is provided at one end of the rod 51. The coupling tool 52 includes a base portion 52a and a pair of plate portions 52b and 52b rising from the base portion 52a. The rod 51 is inserted through a hole 52c formed in the base 52a. At one end of the rod 51, an engaging portion 51a having a diameter larger than that of the hole 52c is formed. The engaging portion 51a is disposed on the inner side of the connector 52 and is held by a base portion 52a and convex portions 52d and 52d formed by recessing a part of the pair of plate portions 52b and 52b inward. Yes. Further, a to-be-towed portion 31 e is disposed between the pair of plate portions 52 b and 52 b, and these are connected by a pin 53. That is, a hole having a size corresponding to the diameter of the pin 53 is formed in the pair of plate portions 52b and 52b and the to-be-towed portion 31e, and the pin 53 is inserted through these holes. The pin 53 is prevented from coming off by a split pin 54 inserted at the end thereof. Thus, the rod 51 and the to-be-towed part 31e are connected in a state where their relative movement is restricted. Here, the pair of plate portions 52b and 52b are formed with holes having a size corresponding to the diameter of the pin 53, but the traction portion 21c provided in the transmission cable 21 of the brake device 10 described above. As shown (see FIG. 14), a long hole may be formed.

  As shown in FIG. 29, the front wheel brake lever 20c is rotatably supported by an attachment member 23C attached to the handle 4. That is, a supported portion 20c is provided at the base portion of the front wheel brake lever 20C in the same manner as the front wheel brake lever 20 described above. A pivot member 24 (for example, a bolt) is inserted into the hole formed in the supported portion 20c and the hole formed in the attachment member 23C, and the front wheel brake lever 20C is centered on the pivot member 24. Can rotate as.

  In addition to the supported portion 20c, a rod connecting portion 20d is provided at the base portion of the front wheel brake lever 20C. The rod 51 is connected not only to the towed portion 31e of the arm 31 but also to the rod connecting portion 20d in a state where relative movement is restricted. The rod 51 is provided with an adjusting mechanism 55 that adjusts the distance between the rod connecting portion 20d and the to-be-towed portion 31e (see FIG. 31).

  Specifically, as shown in FIG. 31, the other end of the rod 51 is connected to the rod connecting portion 20 d by a connecting tool 56. Similarly to the connector 52 described above, the connector 56 includes a base portion 56a having a hole 56c through which the rod 51 is inserted, and a pair of plate portions 56b and 56b. A rod connecting portion 20 d is disposed between the pair of plate portions 56 b and 56 b, and these are connected by a pin 57. A split pin 58 is inserted at the tip of the pin 57 to prevent the pin 57 from falling off. A screw 51b is formed on the outer peripheral surface of the other end of the rod 51, and the base portion 56a is sandwiched between two nuts 55a and 55b fitted to the screw 51b.

  Thus, the rod 51 is connected to the rod connecting portion 20d by the connecting tool 56. Further, the relative movement between the rod 51 and the rod connecting portion 20d is restricted. Therefore, in the brake device 10C, when the interlocking brake lever 40 is operated and rotated toward the grip 4b, the movement is transmitted to the front wheel brake lever 20C, and the front wheel brake lever 20C also rotates toward the grip 4a. Accordingly, the operability of the interlock brake lever 40 and the front wheel brake lever 20C when they are continuously operated can be improved. That is, when the operation of the front wheel brake lever 20C is started while the interlocking brake lever 40 is being rotated toward the grip 4b, the movement is immediately transmitted to the arm 31, and the front wheel brake is applied by the operating force applied to the front wheel brake lever 20C. 14 can be activated.

  Note that when the interlock brake lever 40 is operated (when the interlock brake lever 40 is moved until it touches the grip 4b), the amount of movement of the front wheel brake lever 20C hits the grip 4a from the movable range of the front wheel brake lever 20C (the position before the operation). The dimensions and positions of the interlocking brake lever 40, the front wheel brake lever 20C, the arm 31, etc. are set so as to be smaller than the range up to the position. For example, compared to the distance from the center of rotation of the arm 31 (here, the center of the pivot member 43) to the to-be-triggered portion 31e, the rod connecting portion from the center of rotation of the front wheel brake lever 20C (center of the pivot member 24). The dimensions of the arm 31 and the front wheel brake lever 20C are set so that the distance to 20d increases.

  As shown in FIGS. 29 and 31, the adjusting mechanism 55 described above is composed of these two nuts 55a and 55b and a screw 51b, and the rotation of the screw 51b causes the rod connecting part 20d and the to-be-towed part 31e to The distance of is adjusted. That is, by rotating the screw 51b with respect to the nuts 55a and 55b and moving these positions on the rod 51, the attachment position of the coupling tool 56 moves in the length direction of the rod 51, and the rod coupling portion 20d and the towed portion. The distance from 31e is adjusted.

  In the state before the rod 51 is connected, the front wheel brake lever 20C is in the initial position of the front wheel brake lever 20C, that is, the position when the front wheel brake lever 20C is not operated (the front wheel brake lever 20C shown in FIG. It is configured to be able to rotate beyond the position) in a direction away from the grip 4a (see FIG. 29). The initial position of the front wheel brake lever 20C can be set to an appropriate position in the movable range of the front wheel brake lever 20C by adjusting the distance between the rod connecting portion 20d and the towed portion 31e by the adjusting mechanism 55. That is, the initial position of the gripped portion 20a of the front wheel brake lever 20C by rotating the rod 51, moving the mounting position of the coupling tool 56 on the rod 51, and widening the distance between the rod connecting portion 20d and the towed portion 31e. Can be brought closer to the grip 4a. Further, the initial position of the gripped portion 20a can be separated from the grip 4a by narrowing the distance between the rod connecting portion 20d and the pulled portion 31e.

  Further, since the mounting position of the mounting member 23C on the handle 4 is shifted due to an error during manufacturing, the initial position of the front wheel brake lever 20C may be too far from or too close to the grip 4a. Even in this case, the initial position of the gripped portion 20a can be set to an appropriate position by adjusting the distance between the rod connecting portion 20d and the pulled portion 31e.

  As shown in FIG. 32, the brake device 10C is provided with a spring 29 that biases the front wheel brake lever 20C in a direction in which the front wheel brake lever 20C pulls the rod 51. In the example described here, the attachment member 23C is provided with a spring holding portion 23a at a position facing the base portion of the front wheel brake lever 20C. One end of the spring 29 is accommodated in a recess 23b formed in the spring holding portion 23a, and the other end is accommodated in a recess 20e formed in the base portion of the front wheel brake lever 20C. The spring 29 is a compression spring, and exerts a force in a direction to expand the base portion of the front wheel brake lever 20C and the spring holding portion 23a. The spring 29 prevents the front wheel brake lever 20C from rattling.

  According to the brake device 10C described above, since the rod 51 is provided as the operation force transmission member, it is possible to further reduce the transmission loss in the operation force transmission path from the front wheel brake lever to the front wheel brake operation mechanism. Further, since the rod does not expand as time passes, the length adjustment work by the user becomes unnecessary. As a result, inappropriate adjustment by the user can be prevented.

1 is a side view of a motorcycle including a brake device that is an example of an embodiment of the present invention. Fig. 2 is a front view of the motorcycle. It is the schematic which shows the structure of the said brake device. It is a perspective view which faces the interlocking brake lever and front-wheel brake action mechanism with which the said brake device is provided from diagonally upward. It is a top view of the interlocking brake lever and front-wheel brake action mechanism with which the said brake device is provided. It is a bottom view of the interlocking brake lever and front wheel brake operation mechanism with which the above-mentioned brake device is provided. It is a perspective view of the said interlocking brake lever. It is a perspective view of the master cylinder with which the front wheel brake operation mechanism is provided. It is a perspective view of the rotation member provided in the said interlocking brake lever. It is a top view of the said rotation member. It is a perspective view of the arm with which the above-mentioned front wheel brake operation mechanism is provided. It is a figure for demonstrating operation | movement of the said brake device at the time of operation of the said interlocking brake lever. It is a figure for demonstrating operation | movement of the said brake device at the time of operation of the said interlocking brake lever. It is a figure which shows a mode that the towed part of the said arm moves relatively with respect to the towed part of a transmission cable at the time of operation of the said interlocking brake lever. It is a figure for demonstrating operation | movement of the said brake device at the time of operation of a front-wheel brake lever. It is a figure for demonstrating operation | movement of a brake device when the inner cable of a rear-wheel brake cable remove | deviates from a rotating member. It is a top view of the brake device concerning other embodiments of the present invention. It is a top view of the brake device concerning other embodiments of the present invention. It is a disassembled perspective view of the equalizer and arm with which the brake device shown in FIG. 18 is provided. It is a top view of the equalizer with which the brake device shown in FIG. 18 is equipped, and an arm. It is an enlarged view of an equalizer. It is a perspective view which faces the master cylinder with which the brake device shown in FIG. 18 is provided from the front. It is a front view of the base of an interlocking brake lever. It is a figure for demonstrating operation | movement of the brake device when an interlocking brake lever is operated. It is a figure for demonstrating operation | movement of a brake device when the interlocking brake lever further rotates from the state shown in FIG. It is a figure for demonstrating operation | movement of the brake device when a front-wheel brake lever is operated. It is a figure for demonstrating operation | movement of a brake device when the inner cable of a rear-wheel brake cable is cut | disconnected. It is a figure for demonstrating operation | movement of the brake device when the oil in a hydraulic path | route leaks. It is the schematic of the brake device which concerns on the other form of this invention. It is sectional drawing of the AA line shown in FIG. It is sectional drawing of the BB line shown in FIG. It is sectional drawing of the CC line shown in FIG.

Explanation of symbols

  1 motorcycle, 2 front wheels, 3 rear wheels, 4 handles, 5a front suspension, 5b fork pipe, 6a under bracket, 6b top bridge, 7 steering shaft, 8 engine, 9 mounting member, 10, 10A, 10B, 10C brake Device, 11 Rear wheel brake cable, 12 Hydraulic path, 13 Link member, 14 Front wheel brake, 15 Brake disc, 16 Caliper, 17 Rear wheel brake, 20, 20C Front wheel brake lever, 21 Transmission cable (operation force transmission member), 22 Pivot member, 23, 23C mounting member, 30, 30B front wheel brake operating mechanism, 31, 61 arm, 32, 32B master cylinder, 34 torsion spring, 40, 40B interlocking brake lever, 42 rotating member (input member), 42 c Arm pressing part (operation force input part), 42b Cable attached part (supported part), 43 pivot member, 44 washer, 45 nut, 46 pivot member, 47 washer, 48 retaining member, 51 rod (operation) Force transmission member), 51b screw, 52, 56 connector, 55 adjustment mechanism, 55a, 55b nut, 62 lever side arm, 63 cylinder side arm, 64 equalizer (input member), 64a rotation supported part, 64b cable attached Part, 64c arm pressing part (operation force input part), 65 biasing member, h gap (play) between arm pressing part and lever side pressed part, center of rotational displacement of P rotating member, L1 of rotating member Distance from the center of rotational displacement to the arm pressing part, L2 Distance from the center of rotational displacement of the rotating member to the cable attachment part.

Claims (10)

A front wheel brake lever provided on one side of the handle;
An interlocking brake lever provided on the other side of the handle and connected to a rear wheel brake;
It is arranged adjacent to the interlocking brake lever on the other side of the handle, and generates hydraulic pressure in a hydraulic pressure path connected to the front wheel brake by operating force of the front wheel brake lever or the interlocking brake lever. A front wheel brake operating mechanism for operating the front wheel brake,
An operation force transmission provided from the one side of the handle to the other side and transmitting an operation force of the front wheel brake lever from the one side of the handle to the other side of the handle and inputting it to the front wheel brake operating mechanism. A member, and
The front wheel brake operating mechanism is
A master cylinder having a pressed portion and generating a hydraulic pressure in the hydraulic pressure path when the pressed portion is pressed;
An arm that is arranged so that the operating force of the interlocking brake lever can be input, is connected to the operating force transmission member, and can input the operating force of the front wheel brake through the operating force transmission member, An arm that moves so as to push the pressed portion of the master cylinder when an operating force or an operating force of the interlocking brake lever is input,
The arm is disposed so as to be able to move relative to the interlock brake lever when the operation force of the front wheel brake is input through the operation force transmission member and moves, and the operation force of the interlock brake lever is input. It is connected to the operation force transmission member so that it can move relative to the operation force transmission member when moving,
Between the arm and the interlocking brake lever, there is provided a play for delaying transmission of the operating force from the interlocking brake lever to the arm.
Brake device characterized by that. The brake device according to claim 1, wherein
A rear wheel brake cable for transmitting the operating force of the interlocking brake lever to the rear wheel brake;
An input member that receives the operating force of the interlocking brake lever to pull the rear wheel brake cable and inputs the operating force to the front wheel brake operating mechanism;
The input member is attached to the interlocking brake lever;
Brake device characterized by that. The brake device according to claim 2 ,
The input member is provided so as to be displaceable by a reaction force received from the front wheel brake operating mechanism when the interlocking brake lever is operated,
The rear wheel brake cable suppresses the displacement of the input member against the reaction force received by the input member, and the input member resists the reaction force while the displacement is suppressed. Input the operating force of the brake lever to the front wheel brake operating mechanism,
Brake device characterized by that. The brake device according to claim 3,
The input member includes a supported portion supported by the rear wheel brake cable and an operation force input portion that inputs an operation force of the interlock brake lever to the front wheel brake operation mechanism, and rotates to the interlock brake lever. It is attached so as to be displaceable, and the rotational displacement is suppressed by the supported portion being supported by the rear wheel brake cable,
The distance from the center of the rotational displacement of the input member to the operation force input portion is smaller than the distance from the center to the supported portion,
Brake device characterized by that. The brake device according to claim 2,
The input member is an equalizer;
The equalizer includes a rotationally supported portion that is rotatably supported by the interlocking brake lever, a cable attached portion that is provided at a position away from the rotationally supported portion and that pulls the rear wheel brake cable, and the rotationally supported portion. An operation force input unit that is provided at a position away from the support unit and inputs an operation force of the interlocking brake lever to the front wheel brake operation mechanism;
Brake device characterized by that. The brake device according to claim 5,
The rotation supported portion of the input member is provided between the operation force input portion and the cable attached portion.
Brake device characterized by that. The brake device according to claim 1, wherein
An input member for inputting the operating force of the interlocking brake lever to the front wheel brake operating mechanism;
An urging member that applies a force in a direction opposite to a direction in which the input member inputs an operation force of the interlocking brake lever to the front wheel brake operation mechanism;
Brake device characterized by that. The brake device according to claim 1, wherein
The operating force transmission member is a rod extending from the one side of the handle to the other side.
Brake device characterized by that. The brake device according to claim 8 ,
The rod is connected to the front wheel brake operating mechanism and a connecting portion provided on the front wheel brake lever;
The rod is provided with an adjustment mechanism for adjusting the distance between the front wheel brake operation mechanism and the connecting portion.
Brake device characterized by that.   A straddle-type vehicle comprising the brake device according to claim 1.

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