WO2018142575A1

WO2018142575A1 - Front/rear interlocking brake device for saddle-type vehicle

Info

Publication number: WO2018142575A1
Application number: PCT/JP2017/003969
Authority: WO
Inventors: 雄大内田; 孝文中西; 勝久富; 筒井　正行; 康幸前田; 伸一小関
Original assignee: 本田技研工業株式会社
Priority date: 2017-02-03
Filing date: 2017-02-03
Publication date: 2018-08-09
Also published as: BR112019014573A2; JPWO2018142575A1; CN110248865A; JP6761487B2; CN110248865B; BR112019014573B1

Abstract

Provided is a front/rear interlocking brake device for a saddle-type vehicle that can be attached on the side of a vehicle body in a state in which components relating to a bracket that pivotally supports a rear brake pedal are sub-assembled in advance. Brackets (50, 100) that can be attached to and detached from the vehicle body are provided, each bracket (50, 100) being provided with: an oscillating shaft (53, 80) of a brake pedal (31); an attachment part (50e, 100e) for front wheel brake transmission means (54, 79) and rear wheel transmission means (46) connected to the brake pedal (31) via link means (L1, L2); and a spring engagement part (50f, 100f) that engages with one end of a return spring (59) that biases the movement of the brake pedal (31) toward an initial position.

Description

Front-rear interlocking brake system for straddle-type vehicles

The present invention relates to a front-rear interlocking brake device for a straddle-type vehicle, and more particularly to a front-rear interlocking brake device for a straddle-type vehicle that generates braking force on both a rear wheel brake and a front wheel brake by operating a rear brake pedal. .

2. Description of the Related Art A front-rear interlocking brake device is known that generates braking force on both a rear wheel brake and a front wheel brake by operating a rear brake pedal of a straddle-type vehicle.

In Patent Document 1, in a front-rear interlocking brake device of a motorcycle provided with a hydraulic front wheel brake and a mechanical rear wheel brake, a brake pedal is pivotally supported on a plate-shaped bracket attached to the side of the vehicle body. A configuration is disclosed in which a transmission arm extending rearward and upward from the support portion is fitted with an equalizer that distributes the operating force to both the rear wheel brake actuating rod and the front wheel brake hydraulic master cylinder.

Patent No. 5816600 gazette

However, in the configuration of Patent Document 1, since the equalizer and the return brake for urging the rear brake pedal toward the initial position are engaged with the vehicle body side, the assembly work around the bracket can not be completed unless the bracket is attached to the vehicle body There was a problem called. In addition, since the pivot shaft of the swing arm that supports the rear wheel penetrates the bracket, it is necessary to remove the swing arm to remove the bracket from the vehicle body, and there was room for improvement in terms of maintainability .

SUMMARY OF THE INVENTION The object of the present invention is to solve the problems of the prior art described above, and to provide a front / rear interlocking brake device for a straddle-type vehicle that can be detached from the vehicle body side It is to do.

In order to achieve the above object, the present invention relates to a front wheel brake transmission means (54, 79) for transmitting an operating force of a brake pedal (31) attached to a vehicle body of a straddle-type vehicle (1) to a front wheel brake (BF). And a rear wheel brake transmission means (46) for transmitting the operating force of the brake pedal (31) to the rear wheel brake (BR). A bracket (50, 100) is provided, and the rocking shaft (53, 80) of the brake pedal (31) and the link means (L1, L2) are attached to the brake pedal (31) in the bracket (50, 100). Of the front wheel brake transmission means (54, 79) and rear wheel brake transmission means (46) connected via the attachment portion (50e, 100e) of the rear wheel brake transmission means (46), and movement of the brake pedal (31) The has a first feature in that a spring engaging portion engaging one end of a return spring (59) for biasing the initial position side (50f, 100f) and is provided.

A second feature is that the front wheel brake transmission means (54, 79) is a master cylinder (54) of a hydraulic disk brake or a brake wire (79) of a mechanical drum brake.

Third feature is that the bracket (50, 100) is provided with a switch support portion (50 g, 100 g) of a brake lamp switch (60) that operates with the operation of the brake pedal (31). There is.

Further, the bracket (50, 100) is provided with an opening (50h, 100h) opening in at least one direction, and the rear wheel (WR) is rotatably pivoted in the space of the opening (50h, 100h). A fourth feature resides in positioning the end of the pivot (27) of the swing arm (26) to be supported.

In addition, the fifth embodiment is that the recess (50d, 100d) for preventing the interference with the pivot (27) is provided at the edge of the opening (50h, 100h) of the bracket (50, 100). There is a feature of

In addition, the bracket (50, 100) has a sixth feature in that the attachment portion (50c, 100i) of the muffler (22) is provided.

The pivot (27) is supported by a pair of plate-like hangers (25) in the vehicle width direction formed on the vehicle body frame (11) of the straddle-type vehicle (1), and the bracket (50) , 100) is attached to the outer surface of the hanger (25) in the vehicle width direction, according to a seventh feature.

Further, the engine (30) of the straddle-type vehicle (1) is disposed in front of the vehicle body of the hanger (25), and the brackets (50, 100) attached to the hanger (25) are An eighth feature resides in that it is accommodated between the pivot (27) projecting outward in the width direction and the crankcase (35) of the engine (30).

In addition, a cover member (32) as an exterior part is disposed outside the hanger (25) in the vehicle width direction, and the bracket (50, 100) is covered by the cover member (32). There is a ninth feature.

The bracket (50) is L-shaped having a rear portion (50a) extending rearward from the lower end of the vertical portion (50b), and the master cylinder (54) of the front wheel brake transmission means is A tenth feature lies in the fact that it is disposed at the upper part of the vertical portion (50b).

Furthermore, the bracket (100) is U-shaped having a first rear portion (100c) and a second rear portion (100a) extending respectively backward from the upper and lower end portions of the vertical portion (100b), A brake wire (79) of the front wheel brake transmission means is provided on the vertical portion (100b), and a stopper (100k) for restricting the swing amount of the link means (L2) is provided on the first rear portion (100c). There is an eleventh feature in the point.

According to a first feature, a front wheel brake transmission means (54, 79) for transmitting an operation force of a brake pedal (31) attached to a vehicle body of a straddle-type vehicle (1) to a front wheel brake (BF); A front and rear interlocking brake device for a straddle-type vehicle having a rear wheel brake transmission means (46) for transmitting an operating force of a brake pedal (31) to a rear wheel brake (BR), a bracket (50, 100) and is connected to the bracket (50, 100) via the pivot shaft (53, 80) of the brake pedal (31) and the brake pedal (31) via link means (L1, L2) The mounting portions (50e, 100e) of the front wheel brake transmission means (54, 79) and the rear wheel brake transmission means (46), and the movement of the brake pedal (31) to the initial position side Since a spring engaging portion (50f, 100f) for engaging one end of the return spring (59) for biasing is provided, the front and rear interlocking brake device is mounted on a bracket that is mounted on the side of the vehicle by supporting the brake pedal. It is possible to centrally arrange the components of As a result, the component parts can be assembled in advance to the bracket and then attached to the vehicle body, so that the assembling workability can be improved and the positioning accuracy of the front wheel brake transmission means and the return spring can be enhanced.

According to the second feature, since the front wheel brake transmission means (54, 79) is the master cylinder (54) of the hydraulic disc brake or the brake wire (79) of the mechanical drum brake, the front wheel brake can be hydraulically operated. Even in the case where the specifications for the disk brake and the specifications for the mechanical drum brake are made separately in the same vehicle body, apply the front and rear interlock brake in any of the specifications only by replacing the small assembly parts centering on the bracket. Is possible.

According to the third feature, the bracket (50, 100) is provided with a switch support portion (50 g, 100 g) of the brake lamp switch (60) that operates with the operation of the brake pedal (31). Therefore, the positioning accuracy of the brake lamp switch is improved, and it is not necessary to provide the switch support portion on the vehicle body side, and the number of parts can be reduced.

According to a fourth feature, the bracket (50, 100) is provided with openings (50h, 100h) opening in at least one direction, and a rear wheel (WR) is provided in the space of the openings (50h, 100h). Position the end of the pivot (27) of the swing arm (26) rotatably supporting the bracket, so that the bracket can be easily attached around the pivot of the swing arm, so that the pivot can be attached without detaching The bracket can be attached and removed.

According to the fifth feature, the edge of the opening (50h, 100h) of the bracket (50, 100) is provided with a relief recess (50d, 100d) for preventing interference with the pivot (27). Thus, the pivot and the bracket can be disposed close to each other to reduce the dimension in the vehicle longitudinal direction. In addition, rough positioning of the bracket can be performed by using the relief recess, and the assembling workability of the bracket can be enhanced.

According to the sixth feature, since the mounting portion (50c, 100i) of the muffler (22) is provided on the bracket (50, 100), the bracket for supporting the muffler is also used as the bracket Abolish the dedicated stay and reduce the number of parts.

According to the seventh feature, the pivot (27) is supported by a pair of plate-like hangers (25) in the vehicle width direction formed on the vehicle body frame (11) of the straddle-type vehicle (1) Since the brackets (50, 100) are attached to the outer surface of the hanger (25) in the vehicle width direction, attaching the brackets reinforces the hanger and improves the rigidity of the vehicle body frame. Can.

According to an eighth feature, the engine (30) of the straddle-type vehicle (1) is disposed forward of the vehicle body of the hanger (25), and the bracket (50) mounted on the hanger (25) , 100) between the pivot (27) projecting outward in the vehicle width direction and the crankcase (35) of the engine (30), so the space formed between the pivot and the crankcase of the engine By arranging the brackets using the above, it is possible to prevent the brackets and components from protruding outward in the vehicle width direction.

According to the ninth feature, a cover member (32) as an exterior part is disposed on the outer side in the vehicle width direction of the hanger (25), and the bracket (50, 100) corresponds to the cover member (32). Since the cover member protects the bracket and the components of the front and rear interlocking brake device from stone splashes and the like, the appearance of the saddle-ride type vehicle can be improved.

According to a tenth feature, the bracket (50) is L-shaped having a rear portion (50a) extending rearward from the lower end of the vertical portion (50b), the master of the front wheel brake transmission means Since the cylinder (54) is disposed on the upper portion of the longitudinal portion (50b), in the case of a hydraulic brake where the area of the mounting portion of the master cylinder can be small, the bracket is L-shaped, in the form of front wheel brake transmission means. In addition, the bracket shape can be optimized.

According to an eleventh feature, the bracket (100) is U-shaped having a first rear portion (100c) and a second rear portion (100a) respectively extending rearward from the upper and lower end portions of the vertical portion (100b). And a stopper (not shown) for providing the brake wire (79) of the front wheel brake transmission means to the longitudinal portion (100b) and restricting the swinging amount of the link means (L2) to the first rear portion (100c) In the case of a mechanical brake that increases the area of the mounting portion to support the support portion of the brake wire, the bracket is U-shaped, and the bracket is shaped according to the form of the front wheel brake transmission means. Optimization can be achieved, and the stopper can provide stable operation of the link means.

FIG. 1 is a left side view of a motorcycle to which a front / rear interlocking brake device for a straddle-type vehicle according to the present embodiment is applied. FIG. 1 is an enlarged right side view of a motorcycle showing a structure of a front / rear interlocking brake device according to a first embodiment of the present invention. Fig. 2 is a partially enlarged perspective view of the motorcycle. It is a side view which shows the structure around a bracket. FIG. 5 is a cross-sectional view taken along line VV of FIG. 4; It is VI arrow line view of FIG. FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 2; FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. FIG. 6 is a right side view of a motorcycle showing a structure of a front / rear interlocking brake device according to a second embodiment of the present invention. It is a side view showing the structure of the 2nd bracket circumference. It is a perspective view of the 2nd bracket. It is a perspective view of a link mechanism. It is a XIII arrow line view of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a right side view of a motorcycle 1 to which a front / rear interlocking brake device for a straddle-type vehicle according to the present embodiment is applied. The motorcycle 1 is a straddle-type vehicle in which a fuel tank 16 is disposed under a seat and a bridging portion A is provided between a steering handle 9 and a seat 15. The body frame 11 is connected to the main pipe 12 extending rearward and downward from the head pipe 5, a pair of left and right hangers 25 extending downward from the main pipe 12 at the rear of the engine 30, and left and right pairs extending rearward and upward And the rear pipe 24 of the A pair of left and right front forks 2 rotatably supporting the front wheel WF is supported via a bottom bridge at a lower end portion of a steering stem 33 pivotally supported by the head pipe 5.

The engine 30 is suspended from the lower portion of the vehicle body frame 11 by a mounting portion provided on a hanger 25 extending downward from the main pipe 12 and the main pipe 12. The front end portion of the swing arm 26 rotatably supporting the rear wheel WF is pivotably supported by a pivot 27 provided on the hanger 25. The rear end portion of the swing arm 26 is suspended from the rear frame 24 by the rear cushion 20. A pair of left and right footrest steps 29 is supported at the lower part of the engine 30, and a tread portion of a rear brake pedal 31 is disposed in front of the footrest step 29 on the right side in the vehicle width direction. The combustion gas of the engine 30 is discharged from the rear end of the muffler 22. At the lower part of the hanger 25, a center stand 28 is pivotally supported pivotally.

The front and rear sides of the steering handle 9 fixed to the upper end portion of the steering stem 33 are covered by a front meter cover 8 and a rear meter cover 10 that support the headlights 7. The front and back of the head pipe 5 are covered with a front cowl 4 supporting a combination lamp 6 integrally formed with a blinker device and a position lamp, and a floor panel 13 opposed to the leg of the occupant. At the rear of the floor panel 13, a pair of left and right rear cowls 17 covering the lower side of the seat 15 is disposed. A storage box 14 and a fuel tank 16 are disposed below the openable and closable seat 15. A taillight device 18 is fixed to the rear end of the rear cowl 17, and a pair of right and left blinkers 19 and a rear fender 21 are attached below the taillight device. A foldable rear step 23 used by a rear seat passenger is provided at an end of a stay 45 extending from the rear frame 24. Most of the stay and the hanger 25R are integrally formed and detachably provided. It is covered by a cover 32. The side cover 32 as the cover member protects the side of the pivot 27 of the swing arm 26 and the brake device and the like around the pivot from the rock splash and the like from the outside.

The front-rear interlocking brake system according to the present invention operates the front wheel brake BF by operating the brake lever 34 attached to the steering handle 9, while both the rear wheel brake BR and the front wheel brake BF are interlocked by operating the brake pedal 31. Is configured to operate. In this embodiment, the rear wheel brake BR is a mechanical drum brake, and the front wheel brake BF is either a hydraulic disc brake or a mechanical drum brake.

The front-rear interlocking brake system according to the present invention is characterized by a mechanical structure for interlocking the front wheel brake BF in response to the operation of the rear brake pedal 31 for operating the rear wheel brake BR. In the following, the structure of the first embodiment in which the front wheel brake BF is a hydraulic disc brake will be described using FIGS. 2 to 8 and the front wheel brake BF is a mechanical drum brake using FIGS. The structure of the second embodiment will be described.

FIG. 2 is an enlarged right side view of the motorcycle 1 showing the structure of the front / rear interlocking brake device according to the first embodiment of the present invention. In this figure, the floor panel 13, the footrest step 29, the side cover 32 and the muffler 22 of the motorcycle 1 are shown removed. As shown in FIG. 1, the side cover 32 covers most of the space above the pivot 27 of the hanger 25R in a side view of the vehicle body.

A support pipe 47 extending rearward and upward is connected to a rear end portion of the main pipe 12 extending downward and rearward from the head pipe 5 in the vehicle body. A pair of rear pipes 24 in the vehicle width direction is connected to both sides of the main pipe 12 at a position above the engine 30 and extends rearward and upward. The upper end portion of the support pipe 47 is connected to a connection pipe (not shown) that connects the left and right rear pipes 24 in the vehicle width direction. A gusset 43 as a strength member is welded to the upward curved portion at the rear of the rear pipe 24 and the gusset 44 is also provided at the base of the rear step stay 45.

The pivot 27 of the swing arm 26 is provided on a hanger 25 which is a pair of left and right plate-

like members

25L and 25R extending downward from the rear side surface of the main pipe 12. The engine 30 is suspended from the vehicle body frame 11 by a first mounting bolt 40 provided below the front end of the rear pipe 24, a second mounting bolt 41 penetrating the hanger 25, and a third mounting bolt 42. At a position between the crankcase 35 of the engine 30 and the pivot 27 of the swing arm 26, a plate-like bracket 50 is fixed to the hanger 25R on the right side in the vehicle width direction. The bracket 50 is fixed to the hanger 25R by a bolt 51a passing through the through hole 51 and a bolt 52a passing through the through hole 52 (see FIG. 3), and is fixed to the left and

right hangers

25L and 25R by the third mounting bolt 42 described above. It is done.

Attached to the bracket 50 are a swing shaft 53 of the rear brake pedal 31, a return spring 59 for urging the rear brake pedal 31 to the initial position, and a master cylinder 54 as a front wheel brake transmission means for operating the front wheel brake BF. There is. On the rear side of the rear brake pedal 31, a brake rod 46 as a rear wheel brake transmission means for operating the rear wheel brake BR is connected. A reservoir tank 57 is connected to a reservoir hose 55 protruding from the master cylinder 54 to the right in the vehicle width direction, and a brake hose for transmitting the hydraulic pressure generated by the master cylinder 54 to the front wheel brake BF on the front side of the master cylinder 54 58 are connected. The reservoir tank 57 is fixed to the side of the rear pipe 24 by a fastening member 56.

FIG. 3 is a partially enlarged perspective view of the motorcycle 1. The support stay 29 a of the foot loading step 29 is fixed to the bottom of the crankcase 35 of the engine 30. The rear brake pedal 31 is guided rearward through the lower side of the support stay 29 a, and is pivotally supported by a pivot shaft 53 fixed to the bracket 50. The rear brake pedal 31 is provided with a first hook 31a engaged with the return spring 59, and a second hook 31b engaged with a tension spring 62 for operating the brake lamp switch 60 in accordance with the pedal operation. The wiring 61 of the brake lamp switch 60 is led to the vehicle body side through the side of the rear pipe 24.

An upper extension 63 is provided at the rear end of the rear brake pedal 31, and an equalizer 64 for distributing the operating force to the master cylinder 54 and the brake rod 46 is pivotally supported by the upper extension 63. The upper end of the equalizer 64 supports a first transmission stay 65 connected to the piston of the master cylinder 54, while the lower end of the equalizer 64 supports a second transmission stay 62 connected to the brake rod 46. It is done. The bracket 50 is housed between the crankcase 35 and the pivot 27 which project to the right in the vehicle width direction.

FIG. 4 is a side view showing the structure around the bracket 50. As shown in FIG. 5 is a cross-sectional view taken along the line V--V of FIG. The bracket 50 is L-shaped having a longitudinal portion 50b directed in the vertical direction of the vehicle body and a rear portion 50a extending rearward from the lower end portion of the longitudinal portion 50b, and as shown in FIG. An L-shaped opening 50h is disposed to be directed rearward of the vehicle body in a side view of the vehicle body. At the lower end of the rear end of the rear portion 50a, a mounting portion 50c of the muffler 22 is integrally provided to the side of the vehicle body by welding or the like via a bending portion 50j. As described above, the bracket 50 is fixed to the hanger 25 on the right side in the vehicle width direction by the third mount bolt 42 passing through the through hole 42a and the

bolts

51a and 52a passing through the through holes 51 and 52 (see FIG. 3). A switch support portion 50g of the brake lamp switch 60 is provided at a lower position of the longitudinal portion 50b, and a spring engaging portion 50f of a return spring 59 is provided on the front side of the through hole 52 in the vehicle body. At the upper end portion of the vertical portion 50b, a mounting portion 50e for mounting the master cylinder 54 as a front wheel brake transmission means with two bolts 69 is provided. The master cylinder 54 and the brake rod 46 are connected to the brake pedal 31 via the link means L1 including the upper extension 63 and the equalizer 64. That is, the brake rod 46 is also connected to the attachment portion 50e via the link means L1.

Referring also to FIG. 5, the rocking shaft 53 of the rear brake pedal 31 protrudes inward in the vehicle width direction from the rear portion 50 a. The upper extension 63 of the rear brake pedal 31 is fixed to a cylindrical member 31 c engaged with the swing shaft 53. The equalizer 64 is pivotally supported by a swinging shaft 63 disposed at the upper end portion of the upper extending portion 63, and a first swing shaft 65a disposed at the upper end portion of the equalizer 64 is used. The transmission stay 65 is pivotally supported, while the second transmission stay 62 is pivotally supported by a swing shaft 62 a disposed at the lower end of the equalizer 64.

With this configuration, when the rear brake pedal 31 is operated, the equalizer 64 is pushed to the front of the vehicle by the swing shaft 63a, and along with this, the brake rod 46 is pulled to the front of the vehicle and the piston rod of the master cylinder 54 The front wheel 66 is pressed forward of the vehicle body, and the front and rear brakes are operated in conjunction with each other. According to the structure of the equalizer 64 as described above, the operating play of the brake rod 46 and the master cylinder 54 can be appropriately reduced to operate the front and rear brakes substantially simultaneously. It is possible to set the operating ratio of

A rubber boot 67 is provided at the rear end of the cylindrical master cylinder 54 to prevent moisture and the like from intruding into the piston sliding portion, and an opening 68 for connecting a brake hose 58 is provided at one front end. It is formed. Further, on the rear side of the longitudinal portion 50b, a relief recess 50d is formed to avoid interference with the cylindrical portion 26a of the swing arm 26 through which the pivot 27 passes. According to the relief recess 50d, the bracket 50 can be disposed in a narrow space between the shaft portion of the swing arm 26 and the crankcase 35, and rough positioning can be performed when the bracket 50 is attached, thereby facilitating assembly work. can do. The end of the pivot 27 is located in the space of the opening 50 h surrounded by the L-shape.

According to the front and rear brake interlocking device according to the present invention, the pivot 27 of the swing arm 26 does not engage with the bracket 50, and the hanger 25 with the bracket 50, the master cylinder 54, the equalizer 64 and the return spring 59 small in advance. The brake unit centered on the bracket, as compared to the case where the engaging portion of the return spring is provided on the vehicle body side or the pivot of the swing arm penetrates the bracket, for example. As a result, the attaching and detaching operation can be facilitated, the number of assembling steps can be reduced, and the maintainability can be enhanced.

6 is a view on arrow VI of FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 2, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. A pair of hangers 25 (25L, 25R) extend in the lateral direction from the side of the cylindrical main pipe 12 in the lateral direction of the vehicle and then extend downward in the lateral direction to form the engine 30, the swing arm 26 and the center stand. Construct 28 support parts. The cylindrical member 27a through which the pivot 27 of the swing arm 26 passes is welded to the hangers 25 on both sides, and the cylindrical portion 26a of the swing arm 26 is disposed on the outer side in the vehicle width direction of the cylindrical member 27a. It is configured to penetrate. At the rear of the cylindrical member 27a, a connecting pipe 26b connecting the left and right arm portions of the swing arm 26 is located.

The distance from the side surface of the

hangers

25L and 25R to the inner side wall of the swing arm 26 is set to be substantially the same on the left and right. On the right side in the vehicle width direction, the equalizer 64 and the master cylinder 54 are accommodated in the space between the hanger 25R and the swing arm 26 with the bracket 50 as the center to prevent outward projection, and on the left side in the vehicle width direction In a space between the hanger 25L and the swing arm 26, a space for attaching a drive chain (not shown) for transmitting the driving force of the engine 30 to the rear wheel WR, the chain cover 70, and the chain slider 71 is secured. A bent portion 25a bent inward in the vehicle width direction is provided at the rear end of the hanger 25R on the right side in the vehicle width direction. According to this bent portion 25a, the rigidity corresponding to the operation force of the rear brake pedal 31 can be easily obtained without providing additional parts.

Referring to FIGS. 7 and 8, a reinforcing plate 25b is provided behind the cylindrical member 27a through which the pivot 27 of the swing arm 26 passes, for connecting the

hangers

25L and 25R in the vehicle width direction. Further, a second cylindrical member 28a for pivotally supporting the center stand 28 is welded to the lower end portions of the

hangers

25L and 25R, and further, a strength of the second cylindrical member 28a in front of the vehicle body is A third cylindrical member 77 as a member is welded. The third mount bolt 42 for supporting the lower end of the rear end of the engine 30 is inserted from the left side in the vehicle width direction at the front upper position of the third cylindrical member 77 and an engine mount portion provided at the rear end of the crankcase 35 And fix the bracket 50 together.

FIG. 9 is a right side view of the motorcycle 1 showing the structure of a front / rear interlocking brake device according to a second embodiment of the present invention. The difference from the first embodiment is only in the configuration around the second bracket 100 for interlocking the front wheel brake BF, which is a mechanical drum brake, and therefore, the vehicle body frame 11 and the engine 30, etc. The description is omitted as appropriate. In the following description, the second bracket may be simply referred to as a bracket.

The pivot 27 of the swing arm 26 is provided on a hanger 25 which is a pair of left and right plate-like members extending downward from the rear side surface of the main pipe 12. The engine 30 is suspended from the vehicle body frame 11 by a first mounting bolt 40 provided below the front end of the rear pipe 24, a second mounting bolt 41 penetrating the hanger 25, and a third mounting bolt 42. A plate-shaped second bracket 100 is fixed to the hanger 25 on the right side in the vehicle width direction at a position between the crankcase 35 and the pivot 27. The bracket 100 is fixed to the hanger 25 by

bolts

83 and 84 and a third mounting bolt 42.

Attached to the bracket 100 are a swing shaft 80 of the rear brake pedal 31, a return spring 59 for biasing the rear brake pedal 31 to the initial position, and a brake wire 79 as a front wheel brake transmission means for operating the front wheel brake BF. There is. On the rear side of the rear brake pedal 31, a brake rod 46 as a rear wheel brake transmission means for operating the rear wheel brake BR is connected. A swing stay 81 for pulling the inner wire of the brake wire 79 is supported on the upper portion of the bracket 100 near the rear. At the upper end of the bracket 100, a return spring 82 is engaged which biases the rocking stay 81 toward the initial position.

FIG. 10 is a side view showing the structure around the bracket 100. As shown in FIG. 11 is a perspective view of the bracket 100, and FIG. 12 is a perspective view of the link mechanism. The bracket 100 has a longitudinal portion 100b, a first rear portion 100c extending rearward from the upper end of the longitudinal portion 100b, and a second rear portion 100a extending rearward from the lower end of the longitudinal portion 100b. The U-shaped opening portion 100h is disposed in a V-shape and is directed to the rear of the vehicle body in a side view of the vehicle body. A mounting portion 100i of the muffler 22 is provided at a lower rear end of the second rear portion 100a.

The bracket 100 is fixed to the hanger 25 on the right side in the vehicle width direction by a third mount bolt 42 passing through the through hole 42 a and

bolts

83 and 84. A switch support portion 100g of the brake lamp switch 60 is provided at a lower position of the longitudinal portion 100b, and a spring engaging portion 100f of a return spring 59 is provided on the front side of the bolt 83. At the upper end of the longitudinal portion 100b, a mounting portion 100e for mounting the support stay 83 of the brake wire 79 is provided. At the upper end portion of the mounting portion 100e, an engaging portion 100j with which the return spring 82 of the swinging stay 81 engages is formed. The brake wire 79 and the brake rod 46 are connected to the brake pedal 31 via a link means L2 including an upper extension 95, an equalizer 91 and a swing arm 81. That is, the brake rod 46 is also connected to the mounting portion 100e via the link means L2.

In contrast to the first embodiment described above, in the second embodiment, there is provided a link mechanism for converting the rocking motion of the rear brake pedal 31 into a pulling motion of the brake wire 79, and in accordance with this, to support the link mechanism. The bracket 100 is formed in a U-shape, and the rocking shaft 80 of the rear brake pedal 31 is disposed outside the bracket 100 in the vehicle width direction. However, even in the second embodiment, the end of the pivot 27 is positioned in the space of the opening 100 h surrounded by the U shape, and this is compared to the case where the pivot of the swing arm penetrates the bracket. Thus, the attaching and detaching operation of the brake unit centering on the bracket is facilitated.

The support stay 83 of the brake wire 79 is fixed to the bracket 100 by a nut engaged with the pin 96. The pin 96 pivotally supports a support rod 89 extending to the rear side of the vehicle body, and swings a swing arm 81 formed of a pair of plate members in the vehicle width direction at the rear end of the support rod 89 An oscillating shaft 85 (an axis P2 shown in FIG. 12) that freely supports is provided. At the lower rear of the pin 96, a detent pin 97 for preventing the support stay 83 and the support rod 89 from rotating is provided. The rear end of the return spring 84 is engaged with a pin 86 fixed to the upper end of the swing arm 81.

The upper extension 95 of the rear brake pedal 31 is fixed to the cylindrical member 80a engaged with the swing shaft 80, and the upper end of the upper extension 95 is a support shaft 92 (P4 of the equalizer 91). Is provided. At the lower end of the equalizer 91, the transmission stay 94 of the brake rod 46 is supported by the rocking shaft 93 (P5), while at the upper end of the equalizer 91, the rocking shaft 90 (P3) is used. The lower end portion of the rocking stay 81 is pivotally supported. Then, the link mechanism and the end metal fitting 82 a of the inner wire 82 are connected by the pin 87 (P 1) of the upper end portion of the rocking stay 81. The first rear portion 100 c of the bracket 100 is formed with a stopper 100 k for regulating the amount of swinging of the swinging arm 81 in the clockwise direction.

With this configuration, when the equalizer 91 moves forward with the operation of the rear brake pedal 31, the brake rod 46 is pulled to the front of the vehicle body, and the rocking stay 81 is half centered on the rocking shaft 85 (P2). The inner wire 82 is pulled to the rear of the vehicle body by swinging clockwise.

According to the structure of the equalizer 64 as described above, the operating play of the brake rod 46 and the inner wire 82 can be appropriately filled to operate the front and rear brakes substantially simultaneously. The operating ratio can be set arbitrarily.

Further, on the rear side of the longitudinal portion 100b, a relief recess 100d is formed to avoid interference with the cylindrical portion 26a of the swing arm 26 through which the pivot 27 passes. According to the relief recess 100d, the bracket 100 can be disposed in a narrow space between the shaft portion of the swing arm 26 and the crankcase 35, and rough positioning can be performed when the bracket 100 is attached. Become.

FIG. 13 is a view on arrow XIII of FIG. As in the first embodiment, the pair of hangers 25 (25L, 25R) extends outward in the vehicle width direction from the side portion of the cylindrical main pipe 12 in the vehicle width direction, and then extends downward in the vertical direction. 30, constitute a support portion of the swing arm 26 and the center stand 28. The cylindrical member 27a through which the pivot 27 of the swing arm 26 passes is welded to the hangers 25 on both sides, and the cylindrical portion 26a of the swing arm 26 is disposed on the outer side in the vehicle width direction of the cylindrical member 27a. It is configured to penetrate.

The distance from the side surface of the

hangers

25L and 25R to the inner side wall of the swing arm 26 is set to be substantially the same on the left and right. On the right side in the vehicle width direction, the link mechanism and the support portion of the brake wire 79 are accommodated in the space between the hanger 25R and the swing arm 26 to prevent outward projection, and on the left side in the vehicle width direction A space between the swing arm 26 and a drive chain (not shown) for transmitting the driving force of the engine 30 to the rear wheel WR, a chain cover 70, and a chain slider 71 are secured.

As described above, according to the bracket 50 according to the first embodiment and the bracket 100 according to the second embodiment, the specification for the front wheel brake BF as the hydraulic disk brake and the specification for the mechanical drum brake are the same. Even in the case of separately producing the vehicle body, the front and rear interlocking brake can be applied to any of the specifications only by replacing the small assembly parts centering on the bracket. Then, in any of the specifications, the peripheral parts including the rear brake pedal can be collectively fixed to the bracket, so that they can be assembled to the vehicle body in a small assembly in advance, thereby simplifying assembly work and improving maintainability. Is possible. The openings of the first and second brackets are not limited to the rear side and the upper side, but may be open at least in one direction on the front side or the lower side and can be inserted and attached around the pivot 27 of the swing arm 26.

The forms of the motorcycle and the vehicle body frame, the structure of the front and rear brake system, the shapes and structures of the brackets and the equalizer, the structure of the swing arm and the arrangement of the pivots, the shape of the side cover, etc. Is possible. For example, the bracket may be formed by welding a plurality of members, or may be integrally molded by die casting or cutting. The front-rear interlocking brake device for a straddle-type vehicle according to the present invention is not limited to a motorcycle, and can be applied to various vehicles such as a straddle-type three / four-wheel vehicle.

DESCRIPTION OF SYMBOLS 1 ... motorcycle (striking type vehicle), 11 ... body frame, 12 ... main pipe, 24 ... rear pipe, 25 ... hanger, 26 ... swing arm, 27 ... pivot, 31 ... rear brake pedal (brake pedal), 32 ... 32 Side cover (cover member) 46: Brake rod (rear wheel brake transmission means) 50, 100: Bracket, 50e, 100e: Mounting portion, 50d, 100d: Relief recess, 50f, 100f: Spring engaging portion, 50g, 100 g: switch support portion, 50 h, 100 h: opening portion, 50 c, 100 i: mounting portion of muffler, 53, 80: rocking shaft, 54: master cylinder (front wheel brake transmission means), 59: return spring, 60: brake lamp Switch, 79 ... brake wire (front wheel brake transmission means), BF ... front wheel brake, B ... rear wheel brake

Claims

Front wheel brake transmission means (54, 79) for transmitting the operating force of the brake pedal (31) attached to the vehicle body of the straddle type vehicle (1) to the front wheel brake (BF), and the operating force of the brake pedal (31) In a straddle-type vehicle front and rear interlocking brake device having a rear wheel brake transmission means (46) for transmitting a rear wheel brake (BR),
It has a bracket (50, 100) that can be removed from the vehicle body,
In the bracket (50, 100),
Rocking shafts (53, 80) of the brake pedal (31);
Said front wheel brake transmission means (54, 79) connected to said brake pedal (31) via link means (L1, L2) and mounting portions (50e, 100e) of rear wheel brake transmission means (46);
A spring engaging portion (50f, 100f) engaging one end of a return spring (59) for urging the movement of the brake pedal (31) to the initial position side; Front and rear interlocking brake device for riding type vehicle.
The straddle-type vehicle according to claim 1, wherein the front wheel brake transmission means (54, 79) is a master cylinder (54) of a hydraulic disk brake or a brake wire (79) of a mechanical drum brake. Front and rear interlocking brake device.
The bracket (50, 100) is provided with a switch support portion (50 g, 100 g) of a brake lamp switch (60) that operates in response to the operation of the brake pedal (31). The front and rear interlocking brake device for a straddle-type vehicle according to or 2.
The bracket (50, 100) is provided with an opening (50 h, 100 h) opening in at least one direction,
An end portion of a pivot (27) of a swing arm (26) rotatably supporting a rear wheel (WR) is positioned in the space of the opening (50h, 100h). A front / rear interlocking brake device for a straddle-type vehicle according to any one of 1 to 3.
At the edge of the opening (50h, 100h) of the bracket (50, 100), a relief recess (50d, 100d) for preventing interference with the pivot (27) is provided. The front-rear interlocking brake device for a straddle-type vehicle according to Item 4.
The front and rear interlocking brake of a straddle-type vehicle according to any one of claims 1 to 5, wherein the bracket (50, 100) is provided with a mounting portion (50c, 100i) of the muffler (22). apparatus.
The pivot (27) is supported by a pair of plate-like hangers (25) in the vehicle width direction formed on the vehicle body frame (11) of the straddle-type vehicle (1).
The front-rear interlocking brake device for a straddle-type vehicle according to claim 4, wherein the bracket (50, 100) is attached to the lateral surface of the hanger (25) in the vehicle width direction.
An engine (30) of the straddle-type vehicle (1) is disposed in front of the body of the hanger (25),
The bracket (50, 100) attached to the hanger (25) is characterized in that it fits between the pivot (27) projecting outward in the vehicle width direction and the crankcase (35) of the engine (30). The front-rear interlocking brake device for a straddle-type vehicle according to claim 7.
A cover member (32) as an exterior part is disposed on the outer side in the vehicle width direction of the hanger (25),
9. A front / rear interlocking brake device for a straddle-type vehicle according to claim 7, wherein said bracket (50, 100) is covered by said cover member (32).
The bracket (50) is L-shaped having a rear portion (50a) extending rearward from the lower end of the vertical portion (50b), the master cylinder (54) of the front wheel brake transmission means being the vertical portion The front / rear interlocking brake device for a straddle-type vehicle according to any one of claims 1 to 9, wherein the front / rear interlocking brake device is disposed at an upper portion of (50b).
The bracket (100) is U-shaped having a first rear portion (100c) and a second rear portion (100a) respectively extending rearward from upper and lower end portions of a vertical portion (100b), the front wheel brake Providing the brake wire (79) of the transmission means on the longitudinal portion (100b) and disposing a stopper (100k) on the first rear portion (100c) for regulating the amount of swinging of the link means (L2) The front-rear interlocking brake device for a straddle-type vehicle according to any one of claims 1 to 9, characterized in that