The specific embodiment
The following shown one embodiment of the invention of accompanying drawing of borrowing illustrates the invention process form.
Fig. 1~9 show one embodiment of the invention.Fig. 1 is the motor bike lateral plan; Fig. 2 is the whole pie graph of link braking device; Fig. 3 is master cylinder parts enlarged side views; Fig. 4 be Fig. 34 to view; Fig. 5 be Fig. 35 to view; Fig. 6 is the 6-6 cutaway view of Fig. 3; Fig. 7 is the 7-7 cutaway view of Fig. 6; Fig. 8 has represented the running-active status of the serviceability of independent brake operating parts, (a) is the figure corresponding to Fig. 3, (b) is the figure of corresponding diagram 7; Fig. 9 has represented the running-active status of interlock braking operation piece at serviceability, (a) is the figure corresponding to Fig. 3, (b) is the figure corresponding to Fig. 7.
At first in Fig. 1, motor-scooter type moped body structure 11 is made of anterior framework 12 and the rear portion framework 13 that is linked to these front portion framework 12 rear portions.Anterior framework 12 one have: can support the 12a of pipe portion of the Steering gear 14a of front fork 14 (its axle is propping up front-wheel WF), the following pipe 12b of portion that extends from the 12a of this pipe portion and the bottom 12c that rearward extends from this time pipe portion 12b lower end downwards with turning to; In above-mentioned Steering gear 14a upper end, linking steering tiller 15.
Rear portion framework 13 extends from the rear portion of above-mentioned bottom 12c, simultaneously from the centre backward the top be formed slopely.At the pars intermedia of this back framework 13, supporting trailing wheel WR and can support driving power part 16 with fluctuating; Rearward end and 16 of power parts in back member 13 are provided with posterior bumper 17.On rear portion framework 13, be provided with the containing box 18 of taking in the helmet etc., setting the vehicle seat 19 of double as lid usefulness above the containing box 18 at this.
In the lump with reference to Fig. 2, on steering tiller 15, but but the adjacent brake operating earth's axis with right hand grip 20R is being propped up as the independent brake bar 21 of independent operation spare and the adjacent brake operating earth's axis with left side handle 20L and is being propped up interlock brake rod 22 as the interlock operating parts.
On the other hand, on front-wheel WF, adorning plate disc brake BF as the fluid pressure type car side brake; On trailing wheel WR, adorning drum brake mechanism BR as the mechanical type car side brake; Borrow independent brake bar 21 is carried out brake operating, can be separately as plate disc brake BF; Borrow interlock brake rod 22 is carried out brake operating, can make plate disc brake BF and the start of drum brake mechanism BR interlock.
On a 12a of pipe portion of the anterior framework 12 of body structure 11, master cylinder parts 23 are installed, the brake operating of corresponding independent brake bar 21 from these master cylinder parts 23 to plate disc brake BF the supply system hydrodynamic pressure; Corresponding to interlock brake rod 22 brake operatings from master cylinder parts 23 when plate disc brake BF supplies with hydraulic pressure, to drum brake mechanism BR effect tractive force.
In Fig. 3~7, master cylinder parts 23 are formed by following each part componentization, they are: the master cylinder 24 of exportable brake fluid pressure, head part 25 to master cylinder 24 effect thrust pressures, secondary cylinder 26,, avoid independent brake bar 21 and load distribution bar 27 to produce interfering mutually and independent brake bar 21 and load distribution bar 27 are attached to hookup mechanism 28 on the head part 25 in the load distribution bar 27 as load distribution device of predefined ratio corresponding to the brake operating of interlock brake rod 22 to drum brake mechanism BR side and head part 25 side batch operation power.
Extend up and down under the state that master cylinder parts 23 is installed to body structure 11 and closed upper end and form cylindric cylinder body 30, the piston 31 that makes its front (promptly) face toward hydraulic pressure chamber 32 is matched with 30 one-tenth master cylinders of cylinder body 24 slidably.Form hydraulic pressure chamber 32 at the upper end of cylinder body 30 occlusive part and between above the piston 31, in this hydraulic pressure chamber 32, taking in piston 31 (promptly) side retracing spring 33 of energizing rearward.And, adorning the stopping wheel that retreats limit 39 of limited piston 31 at the rear end of cylinder body 30 (being the lower end) peristome.
An end that leads to the hydraulic hose 34 of hydraulic pressure chamber 32 is connected to the upper end of cylinder body 30 by banjo type union 35, and the other end of this hydraulic hose is connected on the plate disc brake BF, and promptly hydraulic pressure chamber 32 is connected on the plate disc brake BF.
Be provided with annular recessed portion 36 in the outside of piston 31, and a pair of cup seal 37,38 is installed on piston 31 outsides, clip this annular recessed portion 36 from the axial both sides of piston 31.And, be disposed at cup seal 37 between annular recessed portion 36 and the hydraulic pressure chamber 32 in two cup seal 37,38, when the hydraulic pressure in hydraulic pressure chamber 32 is lower than the hydraulic pressure in the annular recessed portion 36, allow that braking liquid flows to the hydraulic pressure chamber 32 from annular recessed portion 36.
Also integrally formed secondary cylinder 26 on cylinder body 30, it is to extend up and down under master cylinder parts 23 are installed on the state of body structure 11 and inaccessible its lower end and forming; Close the upper end open portion of this pair cylinder 26 by lid member 40.
For avoid the braking liquid in the secondary cylinder 26 to come in contact and do not make variation to produce the pressure variation that acts on braking liquid as far as possible, in secondary cylinder 26, taken in diaphragm 41 along with its liquid measure with outer gas; Flange part 41a and the push plate 42 of mounting on this flange part 41a of being located at diaphragm 41 upper ends are clipped in secondary cylinder 26 and cover 40 of members.And lead to the intercommunicating pore 43 of diaphragm 41 in the central portion setting of push plate 42; Lead to the path 44 of above-mentioned intercommunicating pore 43 in push plate 42 and lid member 40 formation, this path 44 in the side of lid member 40 to outside opening.
Above-below direction pars intermedia at secondary cylinder 26 is provided with observation window 45, and the close property of the light-passing board 46 liquid obturation that this observation window 45 is made by glass or synthetic resin, and can see situation in the secondary cylinder 26 clearly by light-passing board 46.
Be provided with the charging hole 47 of the braking liquid in this pair cylinder 26 being supplied with above-mentioned annular recessed portion 36 in the bottom of secondary cylinder 26, simultaneously, also be provided with at piston 31 and be in the release aperture 48 that under the limit state hydraulic pressure chamber 32 is communicated to secondary cylinder 26 that retreats shown in Figure 6.
The piston rod 31a that one and coaxial being connected with rearward (promptly downwards) are extended on above-mentioned piston 31, the rear end of this piston rod 31a from cylinder body 30 more rearward (promptly) highlight.
The rear end of head part 25 pushing piston bar 31a, this be because: be located at an end rotatably support of head part 25 on the head part support 30a of cylinder body 30 bottoms in one by having with the fulcrum 49 of the axis of plane P (this plane P comprises the rotation axis of doing of piston 31) quadrature; And head part 25 also is that the 25a of pushing portion of direct contact piston rod 31a rear end is integrally formed at the pars intermedia of head part 25 along a part of above-mentioned plane P tabular formation.
Hookup mechanism 28 is by first coupling member, 50, the second coupling members 51, constitute with torsion spring 52, and is disposed at above-mentioned plane P one side.Wherein, first coupling member 50 is to extend to form up and down; Second coupling member, 51 to the first coupling members 50 extend longlyer up and down, and with first coupling member, 50 overlay configuration; Torsion spring 52 is located between the cylinder body 30 and second coupling member 51;
In the bottom of first coupling member 50, first slotted hole 53 that extends up and down is being set, the connecting pin 54 that is located at the other end of head part 25 is inserted logical first slotted hole 53.And on second coupling member 51, also extending second slotted hole 55 that is provided with first slotted hole, 53 same width up and down, above-mentioned connecting pin 54 is also inserted logical second slotted hole 55.And be provided with wide diameter portion 54a at the pars intermedia of connecting pin 54, so that make its two ends stage portion be slidably connected to the opposite face of first and second coupling member with the lateral margin of first and second slotted hole 53,55.
On independent brake bar 21, connecting first the input cable 58 an end, and be located at this first the input cable 58 an other end on cylindric splicing ear 59 be connected in the top of first coupling member 50.The first input cable 58 runs through first 30b of cable support portion that is integrally formed on the cylinder body 30, is supported on first 30b of cable support portion round the first end butt of importing the conduit 60 of cable 58.
Sharing of load bar 27 is extending configuration with respect to comprising the plane P that piston 31 makes rotation axis with above-mentioned hookup mechanism 28 the same sides.Be sharing of load bar 27 and hookup mechanism 28 is made the plane P of rotation axis and is disposed at a side with respect to comprising piston 31; And secondary cylinder 26 is disposed at opposite side with respect to above-mentioned plane P.Above-mentioned sharing of load bar 27 1 ends are linked to second coupling member, 51 tops of above-mentioned hookup mechanism 28 by connecting pin 61.
An end that is connecting the second input cable 62 on interlock brake rod 22,63 of cylindric splicing ears that are provided with on these second input cable, 62 other ends are connected in the pars intermedia of sharing of load bar 27.In addition, the second input cable 62 runs through second 30c of cable support portion that is integrally formed at cylinder body 30, is supported on second 30c of cable support portion around the second end butt of importing the conduit 64 of cable 62.
On the other end of sharing of load bar 27, be connected and be located at the cylindric splicing ear 66 of output cable 65 (this output cable 65 runs through the 3rd 30d of cable support portion that is integrally formed at cylinder body a 30) end, be supported on the 3rd 30d of cable support portion round the end butt of the conduit 67 of exporting cable 65.And the other end of output cable 65 is connected in the operating bar 68 of drum brake mechanism BR.
The torsion spring 52 of hookup mechanism 28, the one end is in conjunction with being connected in second coupling member 51, and its other end butt is incorporated into cylinder body 30, and itself is around fulcrum 49.Borrow the spring force that this torsion spring produced, the mobile downwards side of second coupling member 51 is energized, the sharing of load bar 27 that is linked to second coupling member 51 is energized becomes lower position for one is distolateral.On cylinder body 30 one prominent establishing be connected to sharing of load bar 27 1 distolateral below and limit that second coupling member 51 moves to the lower side and sharing of load bar 27 1 distolateral mobile retainers 69 downwards.
First 30b of cable support portion of the conduit 60 of the supporting first input cable 58 extends the top of second coupling member 51 always, upper end by second coupling member 51 is connected to second 30b of cable support portion, can limit second coupling member 51 distolateral the moving upward of side shifting and sharing of load bar 27 1 upward.
As by sharing of load bar 27 and hookup mechanism 28, when carrying out the brake operating of independent brake bar 21, shown in Fig. 8 (a) and (b), by the traction of the first input cable 58, first coupling member 50 on the hookup mechanism 28 is pulled to the top.This first coupling member moving upward, reach head part 25 by the connecting pin 54 that is incorporated into first slotted hole, 53 lower edges: the piston rod 31a of head part 25 pushing master cylinders 24 is also around the rotational of fulcrum 49, and the brake fluid pressure that produces in the hydraulic pressure chamber 32 of master cylinder 24 acts on the plate disc brake BF.At this moment, 54 of connecting pins move in second slotted hole 55 of second coupling member 51 upward, and second coupling member 51 is not moved upward, also not from the brake operation force of hookup mechanism 28 to sharing of load bar 27 side effect independent brake bars 21.
Start situation during about interlock brake rod 22 brake operatings is illustrated with reference to Fig. 9 (a) and (b), when the brake operating second input cable 62 corresponding to interlock brake rod 22 is pulled, when the pars intermedia of sharing of load bar 27 is pulled to the top, at first, because the elastic force of torsion spring 52 acts on the distolateral of sharing of load bar 27, sharing of load bar 27 is a fulcrum with the distolateral connecting pin 61 of one, rotates as Fig. 9 (a) long and two-short dash line.Thus, output cable 65 is pulled, being loaded on trailing wheel WR drum brake mechanism BR is braked prior to the plate disc brake BF of front-wheel WF, so just make the drum brake mechanism BR of start time ratio trailing wheel WR of plate disc brake BF of front-wheel WF want evening, can effectively obtain the good brake feel of motor bike.
By the brake operation force that increases interlock brake rod 22, act on the setting load of the power one of second coupling member 51 from the second input cable 62 by sharing of load bar 27 above torsion spring 52, shown in Fig. 9 (a) solid line, draw on sharing of load bar 27 is whole, have operating effort to act on second coupling member 51 and the output cable 65 by the distribution ratio of the ratio of connecting pin 61 and 63 distances of splicing ear and 63,66 distances of splicing ear.Thus, the drum brake mechanism BR of trailing wheel WR continues the braking start, draw on upward simultaneously corresponding to second coupling member 51, by being incorporated into the connecting pin 54 of second slotted hole, 55 lower edges, head part 25 is around the rotational and the pushing piston bar 31a of fulcrum 49, and the brake fluid pressure that is produced in hydraulic pressure chamber 32 acts on the plate disc brake BF.At this moment, 54 of connecting pins move in first slotted hole 53 of first coupling member 50 upward, and first coupling member 50 is not moved upward, and does not also involve from the influence of hookup mechanism 28 to independent brake bar 21 sides.
When the brake operation force, second coupling member 51 that further increase interlock brake rod 22 were connected to upward mobile being restricted of first 30b of cable support portion, second coupling member 51, the fulcrum that sharing of load bar 27 can connecting pin 61 rotated again.Thereby, might further increase the braking force that the drum brake mechanism BR by trailing wheel WR is produced, simultaneously,, also can guarantee the braking force of trailing wheel WR side even losing to lack at the plate disc brake BF of front-wheel WF hydraulic pressure waits under the imbalance situation.
Pars intermedia at sharing of load bar 27 is integrally formed with outstanding detected portion 27a downwards, and first brake switch 70 with detection piece 70a of this detected portion of contact 27a is supported on first 30e of switch support portion that is located at cylinder body 30.See the detected portion 25b that slightly becomes L shaped and be integrally formed with the side in head part 25 1 ends, 71 of second brake switches that have with the contacted detection piece 71a of this detected portion 25b are supported on the second switch support 30f that is located at cylinder body 30.
First brake switch 70 detects corresponding to the brake operating sharing of load bar 27 of interlock brake rod 22 moving upward; Second brake switch 71 detects corresponding to at least one side's brake operating in independent brake bar 21 and the interlock brake rod 22 time, head part 25 pushing piston bar 31a and the situation of rotating.
Secondly, if the effect of present embodiment will be described, because single component head part 25 with the piston rod 31a rear end direct contact of master cylinder 24, can around with the rotational of plane P (this plane P comprises the rotation axis of doing of piston 31) quadrature be supported on cylinder body 30, promptly become the piston 31a that directly pushes master cylinder 24 with single component head part 25, with can reduce the part number of packages in constituting head parts with a plurality of parts, and simplified the formation of head part 25.
Because head part 25 forms tabular along above-mentioned plane P, can make head part 25 simple shape, and can make head part 25 compact conformations.
Because integrally formed secondary cylinder 26 on cylinder body 30 can be concentrated to constitute master cylinder 24 and secondary cylinder 26 compactly.
Because sharing of load bar 27 and hookup mechanism 28 are disposed at above-mentioned plane P one side, but the start part in the inscape of centralized configuration link braking device like this, easy layout when link braking device is assembled in vehicle.
Because secondary cylinder 26 is disposed at the opposite side of above-mentioned plane P, can not be subjected to the restriction of start section layout in the inscape of link braking device to dispose secondary cylinder 26, the volume settings of secondary cylinder 26 can be got more simultaneously.And can be with master cylinder 24, secondary cylinder 26, sharing of load bar 27 and hookup mechanism 28 compact arrangement on the whole.
Embodiments of the invention more than have been described in detail in detail, but the present invention also is not limited to the foregoing description, in the scope of the present invention of not throwing off the technical scheme record, can carries out all design modifications.
According to such scheme 1 described invention,,, can simplify head part and constitute so can reduce the part number of packages owing to can directly push the piston rod of master cylinder with the single component head part.
According to such scheme 2 described inventions, can simple shape and compact formation head part.
According to such scheme 3 described inventions, but constitute master cylinder and secondary cylinder in the compact set.
According to such scheme 4 described inventions, the Actuator Division in the inscape of link braking device divide can be concentrated configuration, make easy layout when link braking device is assembled on vehicle.
According to such scheme 5 described methods, owing to can not be subjected to the restriction of start section layout in the link braking device inscape to dispose secondary cylinder, the volume settings of secondary cylinder can be got more greatly simultaneously, so can be master cylinder, secondary cylinder, load distribution device and above-mentioned hookup mechanism compact arrangement on the whole.