TW201615479A - Master cylinder arrangement structure in saddle-ride type vehicle - Google Patents

Abstract

In the present invention, a master cylinder unit of a saddle riding-type vehicle is attached to a steering handlebar on the vehicle width inner side of a grip, the master cylinder unit having: a master cylinder that outputs a brake fluid pressure according to an operation of a brake lever disposed at the front of the grip provided to the end of the steering handlebar; and a reserve tank that stores surplus brake fluid. The saddle riding-type vehicle is configured so that the master cylinder (24A) is disposed so as to cross the steering handlebar (17) in a plan view. Due to this configuration, the amount of forward protrusion of the master cylinder unit from the steering handlebar can be suppressed, and the degree of freedom of a design layout around the steering handlebar can be increased.

Description

Brake master cylinder configuration for straddle type vehicles

The present invention relates to a handle provided in a steering handlebar that is rotatably supported by a headstock included in a body frame, and has a grip, and has a brake lever disposed in front of the grip The brake master cylinder that outputs the brake hydraulic pressure and the brake master cylinder unit for storing the remaining brake fluid are mounted on the inner side of the grip in the vehicle width direction, and are mounted on the steering handle handlebar straddle Type of vehicle, especially regarding the improvement of the configuration of the brake master cylinder.

In the straddle type vehicle disclosed in Patent Document 1, the brake master cylinder extends in the front-rear direction and is disposed in front of the steering handlebar.

[Previous Technical Literature] [Patent Document]

[Patent Document 1]

Japanese Special Report 2001-63546

However, in the configuration disclosed in Patent Document 1, if the hydraulic cylinder of the brake master cylinder is extended in the front-rear direction, the brake master cylinder unit will be enlarged toward the front from the steering handlebar, so In consideration of avoiding a collision between the steering handlebar and the front cowl, the steering angle of the steering handlebar must be set to be small, or the front fairing may be provided with a notch portion that matches the shape of the brake master cylinder. This has led to a narrow degree of freedom in the design layout around the steering handlebar. In addition, if the hydraulic cylinder is extended in the left-right direction, it restricts the setting of the meter and the switch type, and also restricts the lever ratio of the brake lever, and has the possibility of reducing the operability of the brake lever. .

The present invention has been developed in view of such circumstances, and an object of the present invention is to provide a reduction in the amount of protrusion of the brake main pump unit from the steering handlebar toward the front, and to increase the design of the periphery of the steering handlebar. The layout of the degree of freedom of the straddle-type vehicle with the brake master cylinder configuration.

In order to achieve the above object, the first feature of the brake master cylinder arrangement structure of the straddle type vehicle of the present invention is directed to the end of the steering handlebar that is rotatably supported by the nose tube included in the body frame. a grip is provided, and the brake master cylinder pump that outputs the brake hydraulic pressure in response to the operation of the brake lever disposed in front of the grip, and the brake master cylinder unit for storing the remaining brake fluid are in the foregoing a straddle type vehicle mounted on the steering handlebar of the steering handle on the inner side in the vehicle width direction of the grip The brake master cylinder system is configured to intersect the steering handlebar when viewed from a plan view.

Further, according to a second feature of the present invention, in addition to the configuration of the first feature described above, the following feature is added: a mounting portion integrally provided in the hydraulic cylinder of the brake master cylinder and protruding from the hydraulic cylinder And a cover body that is sandwiched between the steering handlebar and the mounting portion is fastened and fastened to each other by a fastening structure extending in a vertical direction, and is formed in the hydraulic cylinder The hydraulic cylinder bore is disposed below the aforementioned structural member.

Further, a third feature of the present invention is that, in addition to the above-described first and second features, the following feature is added: the brake master cylinder unit is disposed in a width range of the front-rear direction of the steering handlebar. within.

Further, a fourth feature of the present invention is that, in addition to the structure of the second feature described above, the following feature is added: one end portion of the hydraulic line for guiding the brake hydraulic pressure from the brake master cylinder is connected via a connecting member. Connecting to a rear end portion of the aforementioned hydraulic cylinder, and the connecting member is disposed at a position where at least a portion thereof overlaps with a last one of the plurality of fastening structural members in a plan view when viewed from a plan view .

Further, a fifth feature of the present invention is that, in addition to the structures of the first and second features described above, the following features are added: a grip guard for protecting the grip is provided to cover the brake from the front. The tie rod is attached to the steering handlebar described above, and the shape of the aforementioned grip guard is formed to cover at least a part of the brake master cylinder when viewed from a front view.

According to the first feature of the present invention, the brake master cylinder system is disposed to intersect with the steering handlebar when viewed from a plan view, thereby reducing the amount of protrusion of the brake master cylinder from the steering handlebar forward. The brake master cylinder unit can be mounted tightly on the steering handlebar, which increases the freedom of design layout around the steering handlebar.

Further, according to the second aspect of the present invention, the cover system holds the steering handlebar between the cover body and the mounting portion integrally formed with the hydraulic cylinder of the brake master cylinder, the cover body and the mounting portion being The fastening structure is fastened and joined by the fastening structure extending in the up and down direction, and the hydraulic cylinder hole in the hydraulic cylinder is located below the fastening structure, so that the position of the brake master cylinder is not tightly pressed. Restricted by the solid structural member, the amount of protrusion of the brake master cylinder unit to the front of the steering handlebar can be suppressed to be smaller, so that the brake master cylinder unit can be more tightly mounted on the steering handlebar.

According to the third feature of the present invention, the brake master cylinder unit is disposed within the width range of the front and rear direction of the steering handlebar, and therefore, the steering operation angle of the steering handlebar can be increased, and the steering angle of the front wheel is changed. Large to improve steering operability (steering).

According to a fourth feature of the present invention, one end portion of the hydraulic line is connected to a rear end portion of the hydraulic cylinder via a connecting member, and the connecting member is disposed when viewed from a plan view, at least a part of which is a position at which the last fastening structural members of the plurality of fastening structural members overlap, thereby suppressing the amount of protrusion of the hydraulic circuit from the steering handlebar to the rear. The steering operation angle (steering angle) of the handlebar can be increased.

Further, according to the fifth feature of the present invention, the grip guard for protecting the aforementioned grip is mounted on the handlebar for steering operation, and the grip guard is wrapped around the brake master cylinder when viewed from a front view. At least a part of the grip guard is arranged to reduce the amount of protrusion of the brake master cylinder from the steering handlebar to the front, thereby suppressing the enlargement of the periphery of the steering handlebar. It can also protect the brake master cylinder.

15‧‧‧ head tube

17‧‧‧ steering handlebars

21‧‧‧ grip

23‧‧‧煞车杆杆

23a‧‧‧Pushing protrusion

24A, 24B‧‧‧ brake master cylinder

25A, 25B, 25C, 25D, 25E‧‧ ‧ oil storage tank

26A, 26B, 26C, 26D, 26E‧‧‧ brake master cylinder unit

27‧‧‧Hydraulic cylinder bore

28A, 28B‧‧‧Hydraulic cylinder

29‧‧‧Piston

29a‧‧‧Piston rod

30‧‧‧ hydraulic room

31‧‧‧Return spring

32,47‧‧‧Installation Department

33‧‧‧ cover

34,35‧‧‧ fastening structural members, ie bolts

40‧‧‧ rubber casing

41‧‧‧ grip arch

43‧‧‧Hydraulic piping, ie brake hose

44‧‧‧Connecting members

F‧‧‧ body frame

W‧‧‧ Width of the front and rear direction of the steering handlebar

Fig. 1 is a right side view of the two-wheeled locomotive of the first embodiment. (First embodiment)

Fig. 2 is an enlarged plan view when viewed from the direction of arrow 2 in Fig. 1. (First embodiment)

Fig. 3 is a cross-sectional view taken along line 3-3 of Fig. 2; (First embodiment)

Fig. 4 is a front elevational view as seen from the direction of arrow 4 in Fig. 2. (First embodiment)

Fig. 5 is a plan view corresponding to Fig. 2 of the second embodiment. (Second embodiment)

Fig. 6 is a cross-sectional view taken along line 6-6 of Fig. 5. (Second embodiment)

Fig. 7 is a plan view corresponding to Fig. 2 of the third embodiment. (Third embodiment)

Figure 8 is a cross-sectional view taken along line 8-8 of Figure 7; (third implementation the way)

Fig. 9 is a plan view corresponding to Fig. 2 of the fourth embodiment. (Fourth embodiment)

Fig. 10 is a cross-sectional view taken along line 10-10 of Fig. 9. (Fourth embodiment)

Fig. 11 is a cross-sectional view corresponding to Fig. 2 of the fifth embodiment. (Fifth Embodiment)

Fig. 12 is a cross-sectional view taken along line 12-12 of Fig. 11. (Fifth Embodiment)

The drawings illustrate the embodiments of the present invention as follows. In addition, in the following description, the said front-back, left-right, and up-and-down means the direction seen by the rider riding on a two-wheeled locomotive.

[First Embodiment]

The first embodiment of the present invention will be described with reference to Figs. 1 to 4 . First, in the first figure, the head tube 15 included in the body frame F of the straddle type vehicle, that is, the two-wheeled locomotive, is steerably supported: the front fork pivotally supporting the front wheel WF at the lower end portion 16 and the steering handle handlebar 17 are supported by the pivot shaft 18 provided in the intermediate portion of the vehicle body frame F in the front-rear direction, and are supported by the rear wheel WF that can swing up and down, and are disposed on the pivot shaft Behind the skeleton 18.

The internal combustion engine E that exerts the driving force for driving the aforementioned rear wheel WR is The vehicle body frame F is mounted between the front wheel WF and the rear wheel WR, and the fuel body 19 disposed above the internal combustion engine E is supported on the vehicle body frame F for the purpose of The bicycle seat cushion 20 is disposed behind the fuel tank 19 by the rider who performs the steering operation of the handlebar handlebar 17 .

In the second drawing, the right end portion of the steering handlebar handle 17 is provided with a grip 21 that can be gripped by the rider sitting on the bicycle seat cushion 20 with the right hand, and the switch box 22 is disposed at The inner side of the grip 21 in the vehicle width direction is fixed to the steering handlebar handle 17 on the handlebar handlebar 17 for gripping the switch case 22 to the grip 21 and the handlebar handle 21 In the place between the positions, the brake master cylinder unit 26A is provided, and the brake master cylinder unit 26A has a brake master cylinder 24A that outputs a brake hydraulic pressure in response to the operation of the brake lever 23 disposed in front of the grip 21. And an oil storage tank 25A for storing the remaining brake fluid.

Referring to Figs. 2 and 3, the brake master cylinder 24A is provided with a hydraulic cylinder 28A extending in the front-rear direction and having a hydraulic cylinder bore 27 that has closed the rear end portion; A hydraulic chamber 30 is formed between the rear end closing portions of the hydraulic cylinder bores 27, and a piston 29 slidably fitted in the hydraulic cylinder bore 27 is provided; in order to increase the aforementioned piston 29 toward the hydraulic chamber 30 This side (i.e., the front side) of the volume is pushed and received by the return spring 31 housed in the hydraulic chamber 30. The brake master cylinder 24A is configured to be in contact with the steering handlebar when viewed from a plan view. 17 cross.

In the rear portion of the hydraulic cylinder 28A, a mounting portion 32 that protrudes upward is integrally provided, and the steering handlebar 17 is held between the mounting portion 32 and the lid 33, and is used up and down. A pair of fastening structural members extending in the direction, that is, bolts 34, 35 are clamped from the front and rear positions of the steering handlebar handle 17, and the mounting portion 32 and the cover 33 are fastened to each other, and the oil is The cylinder bores 27 are disposed below the aforementioned bolts 34, 35.

The oil storage tank 25A is disposed above the hydraulic cylinder hole 27 and in front of the steering handlebar 17 in order to be positioned further inward in the vehicle width direction than the brake master cylinder 24A. The front portion of the hydraulic cylinder 28A that is integrally connected to the brake master cylinder 24A is integrally formed.

A pull rod bracket 38 is integrally provided at a front portion of the hydraulic cylinder block 28A, and an inner end portion of the brake lever 23 in the vehicle width direction is supported by a support shaft 39 having an axis extending in the up and down direction. The rod holder 38 is rotatably supported.

The piston 29 of the brake master cylinder 24A has a piston rod 29a that is formed integrally with the same axis, and the pressing protrusion 23a provided in the brake lever 23 abuts against the piston rod 29a from the front. A rubber sleeve 40 is provided between the front end portion of the piston rod 29a and the hydraulic cylinder 28A.

The brake master cylinder unit 26A is disposed within the width W of the front and rear direction of the steering handlebar 17 as shown in Fig. 2 .

As can be seen from Fig. 4, the handlebar handlebar 17 is mounted with a grip guard 41 for protecting the grip 21, and the grip guard 41 is mounted to cover the brake lever from the front. 23. The shape of the grip guard 41, when viewed from the front view, is formed to cover the shape of at least a portion of the brake master cylinder 24A (in this embodiment, a portion of the cladding).

For the caliper 42 of the disc brake B mounted on the front wheel WF, the hydraulic pressure from the brake master cylinder 24A is guided to the caliper 42 via the hydraulic line, that is, the brake oil pipe 43, and one end of the brake oil pipe 43 The connecting member 44 is connected to the rear end portion of the hydraulic cylinder 28A via a connecting member 44 that is attached to the rear end portion of the hydraulic cylinder 28A and communicates with the hydraulic chamber 30.

Further, at least a part of the aforementioned connecting member 44 (in this embodiment, the rear portion of the connecting member 44) is disposed in a pair of the cover member 33 and the pair of the mounting portions 32 when viewed from a plan view. The position where the last bolts 35 of the bolts 34, 35 overlap.

Next, the operation of the first embodiment will be described. In response to the operation of the brake lever 23 disposed in front of the grip 21 at the right end of the steering handlebar handle 17, the brake master cylinder 24A that outputs the brake hydraulic pressure is configured. When viewed from the plan view, the steering handlebar handlebar 17 is crossed. Therefore, the amount of protrusion of the brake master cylinder 24A from the steering handlebar handle 17 can be reduced, and the brake master cylinder can be provided. 24A and the brake master cylinder unit 26A of the oil storage tank 25A for storing the remaining brake fluid are tightly mounted on the steering handlebar handle 17, and the steering operation can be increased. The degree of freedom in design layout around the handlebar 17 is applied.

Moreover, since the amount of protrusion of the brake master cylinder 24A protruding forward from the steering handlebar 17 can be reduced, the brake lever 23 can be disposed close to the side of the steering handlebar handlebar 17, and the brake can be lifted. The operability of the tie rod 23. Further, by arranging the brake master cylinder unit 26A to be compact, the two-wheeled locomotive can be manufactured such that the periphery of the steering handlebar 17 has no weight feeling and the appearance can be improved. In addition, since the periphery of the steering operation handlebar 17 becomes tighter, the steering operation angle (steering angle) of the handlebar can be increased, and the steering angle of the front wheel WF can also be increased, and the steering operability (steering property) can be improved. .

The mounting portion 32 that is integrally provided in the hydraulic cylinder 28A of the brake master cylinder 24A and protrudes upward from the hydraulic cylinder 28A is fastened to the lid 33 by bolts 34 and 35 extending in the vertical direction. Together, the steering handle handlebar 17 is clamped between the mounting portion 32 and the lid body 33, and the hydraulic cylinder bore 27 formed in the hydraulic cylinder block 28A is disposed above the bolt 34. Since the position of the brake master cylinder 24A is not limited by the bolts 34 and 35, the amount of protrusion of the brake master cylinder unit 26A protruding forward from the steering handlebar 17 can be reduced to be smaller. On the steering handlebar handlebar 17, the brake master cylinder unit 26A can be mounted more tightly to improve steering steerability (steerability).

The brake master cylinder unit 26A is disposed so as to be positioned within the width W of the steering operation handlebar 17 in the front-rear direction, so that the steering operation angle (steering angle) of the steering operation handlebar 17 can be increased, and the front wheel The steering angle of the WF can be made larger to improve steering steerability (steering).

The grip guard 41 for protecting the grip 21 is attached to the steering handlebar 17 in such a manner as to cover the brake lever 23 from the front, and the shape of the grip guard 41 is formed: When viewed from the front view, at least a portion of the brake master cylinder 24A is covered, and therefore, the grip guard 41 can be disposed: because the steering master handle 24A is reduced from the steering handlebar 17 toward the front. The space derived from the protrusion can suppress the hypertrophy around the handlebar and protect the brake master cylinder 24A. When viewed from the front, the brake master cylinder 24A can not be too eye-catching, but can improve the appearance. .

Further, one end portion of the brake oil pipe 43 for guiding the brake hydraulic pressure from the aforementioned brake master cylinder 24A is connected to the rear end portion of the aforementioned hydraulic cylinder 28A via a connecting member 44, and the connecting member 44 is disposed at: When viewed in a plan view, at least a part of the plurality of bolts 35 and 35 overlap with the last bolt 35 of the plurality of bolts 34 and 35. Therefore, the amount of protrusion of the brake oil pipe 43 from the steering handlebar 17 to the rear can be reduced. The steering operation angle (steering angle) of the handlebar 17 can be increased.

[Second Embodiment]

The second embodiment of the present invention will be described with reference to the fifth embodiment and the sixth embodiment. The components corresponding to those in the first embodiment are denoted by the same reference numerals, and are only indicated in the drawings, and the detailed description thereof is omitted. Description.

Vehicle width of grip 21 at the right end of steering handlebar handlebar 17 On the inner side of the direction, a brake master cylinder unit 26B is installed. The brake master cylinder unit 26B has a brake master cylinder 24A and an oil storage tank 25B for storing the remaining brake fluid, and the brake master cylinder 24A is configured to: When the switch case 22 is interposed between the handle and the grip 21, and viewed from a plan view, the brake master cylinder 24A crosses the steering handlebar 17 described above.

The brake master cylinder 24A is attached to the steering handlebar handle 17 in the same manner as in the first embodiment, and the oil reservoir 25B is integrally connected to the hydraulic cylinder 28A of the brake master cylinder 24A. It is disposed on the inner side in the vehicle width direction from the brake master cylinder 24A, and is above the hydraulic cylinder hole 27, and above the steering handle handlebar 17.

According to the second embodiment, the same effects as those of the first embodiment described above can be achieved.

[Third embodiment]

The third embodiment of the present invention will be described with reference to Fig. 7 and Fig. 8. The components corresponding to those in the first embodiment are denoted by the same reference numerals, and are only indicated in the drawings, and the detailed description thereof is omitted. Description.

A brake master cylinder unit 26C is mounted on the inner side in the vehicle width direction of the grip 21 at the right end of the steering handlebar 17, and the brake master cylinder unit 26C has a brake master cylinder 24A and is used to store the remaining brakes. The oil reservoir 25C, and the brake master cylinder 24A is configured such that the switch box 22 is interposed between the lock cylinder 22 and the grip 21, and the brake master cylinder 24A is used for the steering operation as viewed from a plan view. The handlebars 17 cross.

The brake master cylinder 24A is attached to the steering handlebar 17 in the same manner as in the first embodiment, and the oil reservoir 25C is integrally connected to the rear of the hydraulic cylinder 28A of the brake master cylinder 24A. Further, it is disposed such that it is more inward than the aforementioned brake cylinder master 24A in the vehicle width direction, and is higher than the aforementioned hydraulic cylinder bore 27, and the upper end portion is located more than the steering handle handlebar 17 The upper side is located behind the steering handle handlebar 17 as described above.

According to the third embodiment, the same effects as those of the first embodiment described above can be achieved.

[Fourth embodiment]

The fourth embodiment of the present invention will be described with reference to FIG. 9 and FIG. 10, and the components corresponding to those in the first embodiment are denoted by the same reference numerals, and are only indicated in the drawings, and the detailed description thereof is omitted. Description.

A brake master cylinder unit 26D is mounted on the inner side in the vehicle width direction of the grip 21 at the right end of the steering handlebar 17, and the brake master cylinder unit 26D has a brake master cylinder 24B and is used to store the remaining brakes. The oil reservoir 25D, and the brake master cylinder 24B is configured such that the switch box 22 is interposed between the lock cylinder 22 and the grip 21, and the brake master cylinder 24B is used for the steering operation as viewed from a plan view. The handlebars 17 cross.

The brake master cylinder 24B includes a hydraulic cylinder 28B having a hydraulic cylinder bore 27 that extends in the front-rear direction and closes the rear end portion, and is formed between the brake cylinder 28B and the rear end closing portion of the hydraulic cylinder bore 27; Hydraulic chamber 30 a piston 29 that is slidably fitted into the hydraulic cylinder bore 27; the piston 29 is biased toward the side (ie, the front) that increases the volume of the hydraulic chamber 30, and is housed in the hydraulic chamber The return spring 31 in 30. This brake master cylinder 24B is configured such that the brake master cylinder 24B crosses the steering handlebar handle 17 when viewed from a plan view.

Further, at a front portion of the hydraulic cylinder block 28B, a hydraulic passage extending in parallel with the hydraulic cylinder bore 27 and communicating with the hydraulic chamber 30 is formed at a lower portion than the hydraulic cylinder bore 27. 46. The connecting member 44 that communicates with the rear end portion of this hydraulic circuit 46 is attached to the rear end of the hydraulic cylinder 28B.

In the rear portion of the hydraulic cylinder 28B of the brake master cylinder 24B, a mounting portion 47 that protrudes upward is integrally provided, and the steering handlebar 17 is held between the mounting portion 47 and the lid 33. And the pair of bolts 34 and 35 extending in the vertical direction are clamped from the front and rear positions of the steering handlebar handle 17, and the mounting portion 47 and the lid body 33 are fastened to each other, and the oil pressure is applied. The cylinder bore 27 is disposed below the bolts 34, 35.

The oil storage tank 25D is integrally connected to the front portion of the hydraulic cylinder 28B of the brake master cylinder 24B, and is disposed closer to the inner side in the vehicle width direction than the brake master cylinder 24B. The hydraulic cylinder bore 27 is further above and below the front and rear of the steering handlebar handle 17.

According to the fourth embodiment, the same effects as those of the first embodiment described above can be achieved.

[Fifth Embodiment]

The fifth embodiment of the present invention will be described with reference to FIG. 11 and FIG. 12, and the components corresponding to those in the first embodiment are denoted by the same reference numerals, and are only indicated in the drawings, and the detailed description thereof is omitted. Description.

A brake master cylinder unit 26E is provided on the inner side in the vehicle width direction of the grip 21 at the right end portion of the steering handlebar handle 17, and the brake master cylinder unit 26E has a brake master cylinder 24B and is used to store the remaining brakes. The oil reservoir 25E, and the brake master cylinder 24B is configured to sandwich the switch box 22 between the handle and the grip 21, and when viewed from a plan view, the brake master cylinder 24B is used for the steering operation described above. The handlebars 17 cross.

The sump 25E is integrally connected to the rear portion of the hydraulic cylinder 28B of the brake master cylinder 24B, and is disposed on the inner side in the vehicle width direction of the brake master cylinder 24B, and is The aforementioned steering operation handlebar 17 is located at the lower rear side.

According to the fifth embodiment, the same effects as those of the first embodiment described above can be achieved.

The embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the invention.

For example, in the above-described embodiment, the case where the present invention is applied to a two-wheeled locomotive has been described. However, the present invention is not only a two-wheeled locomotive but also widely applicable to various types including a three-wheeled locomotive. Straddle type The vehicle is implemented.

17‧‧‧ steering handlebars

23‧‧‧煞车杆杆

23a‧‧‧Pushing protrusion

24A‧‧‧ brake master cylinder

25A‧‧‧ oil storage tank

26A‧‧‧ brake master cylinder unit

27‧‧‧Hydraulic cylinder bore

28A‧‧‧Hydraulic cylinder

29‧‧‧Piston

29a‧‧‧Piston rod

30‧‧‧ hydraulic room

31‧‧‧Return spring

32‧‧‧Installation Department

33‧‧‧ cover

34,35‧‧‧ fastening structural members, ie bolts

40‧‧‧ rubber casing

41‧‧‧ grip arch

44‧‧‧Connecting members

Claims (5)

A brake master cylinder arrangement structure for a straddle type vehicle, which is directed to a steering handlebar handle (17) that is rotatably supported by a head pipe (15) included in a body frame (F) A grip (21) is attached to the end, and a brake master cylinder (24A, 24B) for outputting the brake hydraulic pressure in response to the operation of the brake lever (23) disposed in front of the grip (21), and for storing The brake master cylinder unit (26A, 26B, 26C, 26D, 26E) of the remaining oil storage tank (25A, 25B, 25C, 25D, 25E) is in the vehicle width direction inner side of the aforementioned grip (21), The straddle type vehicle mounted on the steering handlebar handle (17) is characterized in that the brake master cylinder (24A, 24B) is arranged to be in contact with the steering handlebar when viewed from a plan view ( 17) Cross. The brake master cylinder arrangement structure of the straddle type vehicle according to claim 1, wherein the hydraulic cylinders (28A, 28B) integrally provided to the brake master cylinders (24A, 24B) are from the hydraulic cylinder The protruding portion (32, 47) of the body (28A, 28B) and the cover (33) for holding the steering handlebar handle (17) between the mounting portion (32, 47) and the mounting portion (32, 47) are The fastening structural members (34, 35) extending in the up-and-down direction are fastened to each other, and the hydraulic cylinder bores (27) formed in the hydraulic cylinders (28A, 28B) are disposed in comparison with the foregoing. The structural members (34, 35) are further below. The brake master cylinder arrangement structure of the straddle type vehicle according to claim 1 or 2, wherein the brake master cylinder unit (26A, 26B, 26C, 26D, 26E) is disposed within the width (W) of the front and rear direction of the steering handlebar handle (17). The brake master cylinder arrangement structure of the straddle type vehicle according to claim 2, wherein one end portion of the hydraulic line (43) for guiding the brake hydraulic pressure from the brake master cylinder (24A, 24B) is via a connecting member (44) is coupled to a rear end portion of the aforementioned hydraulic cylinder (28A, 28B), and the connecting member (44) is disposed at least a portion of the fastening member as viewed from a plan view The position of the last of the fastening members (35) in the structural members (34, 35) is overlapped. The brake master cylinder arrangement of the straddle type vehicle according to claim 1 or 2, wherein the grip guard (41) for protecting the grip (21) is to cover the brake from the front The tie rod (23) is attached to the steering handlebar handle (17), and the shape of the aforementioned grip guard (41) is formed: when viewed from a front view, the brake master cylinder (24A, At least part of 24B).