JP3265438B2 - Hydraulic master cylinder for bar handle vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a motorcycle, a tricycle or a tricycle.
Regarding hydraulic master cylinders that operate hydraulically operated brakes and clutches used in bar handle vehicles such as four-wheel buggy vehicles, the feeling of the operating lever attached to the cylinder body of the hydraulic master cylinder can be changed. Related to the structure.

[0002]

2. Description of the Related Art As a hydraulic master cylinder mounted on a handlebar of a motorcycle or the like, for example, Japanese Utility Model Laid-Open No. 2-24
No. 071 is disclosed.

In this hydraulic master cylinder, a piston is inserted into a cylinder hole of a cylinder body to define a hydraulic chamber between the piston and a bottom wall of the cylinder hole. With the return spring contracted in between, the piston is springed toward the opening of the cylinder hole, and the rear end of the piston on the opening side of the cylinder hole is pushed by the operation lever pivotally supported by the cylinder body. The hydraulic fluid pressurized in the hydraulic chamber is supplied to a front brake and a clutch.

[0004]

In such a configuration,
Since the grip resistance of the operation lever is constant, the weight feeling of the lever when the rider grips and operates the operation lever, that is, the lever feeling, cannot be freely changed on the user side.

[0005] This lever feeling is considered to be one of the important factors for the bar-handled vehicle to be easy to use for each rider, to be able to handle the vehicle freely, and to perform safe driving. The lever feeling also varies depending on the rider's physique and taste. Their preferences differed from each other.

Accordingly, the present invention makes it possible to adjust the set load of the return spring, which is the grip resistance of the operation lever, and to freely set the lever feeling of the brake or the clutch according to the rider's physique or preference. It is an object of the present invention to provide a hydraulic master cylinder for a bar handle vehicle.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cylinder body in which a piston is inserted into a bottomed cylinder hole formed by leaving a bottom wall. The piston is resiliently moved toward the opening of the cylinder hole by a return spring compressed in the hydraulic chamber, and the rear end of the piston disposed on the opening side of the cylinder hole. Is pressed by an operation lever pivotally supported by the cylinder body to raise the working fluid in the hydraulic chamber, and a through hole is formed in a bottom wall of the cylinder hole. A spring adjusting plate is provided between the bottom wall of the cylinder hole and the piston, and a threaded rod is screwed into the spring adjusting plate.
A stopper is protrudingly provided on the outer periphery of the threaded rod , a screw rod is inserted into the through hole, a tip of the threaded rod is projected outwardly of a bottom wall of the cylinder hole, and a lock nut is threaded on the tip of the threaded rod. At the same time, the return spring is contracted between the spring adjustment plate and the tip of the piston.

[0008]

[Function] Outer circumference of spring adjustment plate or syringe
Female screw holes and through holes in the bottom wall of the
The hydraulic chamber is located between the piston and the spring adjustment plate.
Or between the piston and the bottom wall of the cylinder bore
You.

The spring adjusting plate is provided with a cylinder hole.
Remove the bottom wall from the inside and outside with the stopper
Clamping between the lock nut and the inside of the cylinder bore
At a predetermined position. Loosen this lock nut
When the wand is rotated, the wand rotates in place and the spring
Only the adjustment plate slides in the cylinder hole in the axial direction
I do.

Thus, the spring adjustment plate and the pin
The length of the return spring supported between the ston and
That is, the set load is changed and the operation lever is
The feeling that acts as a grip resistance on the
You.

[0011]

【Example】 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
I will tell.

FIG. 1 shows a liquid according to a first embodiment of the present invention.
2 and 3 are sectional views of a main part of a pressure master cylinder according to the present invention.
FIG. 2 shows a second embodiment of the present invention.
FIG. 3 is a sectional view of a main part of the hydraulic master cylinder, and FIG.
-III sectional views, FIGS. 4 and 5 show a third embodiment of the present invention .
FIG. 4 is a sectional view of a main part of the hydraulic master cylinder, and FIG.
4 and FIG. 6 and FIG. 7 show a third embodiment of the present invention.
FIG. 6 is a sectional view of an essential part of a hydraulic master cylinder, and FIG.
7 is a sectional view taken along the line VII-VII of FIG.

The hydraulic master cylinder 1 of the first embodiment shown in FIG . 1 is a reservoir integrated type having a reservoir 4 for storing a hydraulic fluid on an upper part of a cylinder body 2 fixed to a handlebar of a bar handle vehicle. The cylinder body 2 is provided with a cylinder hole 3 having a bottom. A piston 5 is inserted into the opening of the cylinder hole 3 and a spring adjusting plate 20 is inserted into the bottom wall 2a. A hydraulic chamber 27 is defined between the spring adjustment plate 20 and the spring adjustment plate 20 .

[0014] The front and rear outer periphery of the piston 5, the primary cup 8a and Sekondarikappu 8b is fitted, both mosquito
Outside the small-diameter shaft portion of the piston 5 sandwiched between the tips 8a and 8b
The circumference is defined as the auxiliary oil chamber 10 of the hydraulic chamber 27,
The chamber 10 is sealed liquid-tight with cups 8a and 8b.
The pressure chamber 27 is made up of the primary cup 8a and the sealing material 2 described later.
6 together with a liquid-tight seal. The hydraulic chamber 27 and the auxiliary oil chamber 10 communicate with each other through a relief port 11 and a supply port 12 formed in a partition wall 2b between the cylinder hole 3 and the reservoir 4, and the hydraulic fluid in the two chambers 27 and 10 and the reservoir 4 However, they can be mutually distributed.

A return spring 13 is contracted between the piston 5 of the hydraulic chamber 27 and the spring adjusting plate 20.
The operation lever 1 is urged toward the opening of the cylinder hole 3 by the elastic force of
4 is supported by the working arm 14a. A boss 2 d is projected from the lower wall 2 c of the cylinder hole 3, and an outlet port 15 is provided in the boss 2 d in communication with the hydraulic chamber 27 .

When the piston 5 is not actuated, the piston 5 is at the retreat limit position shown in FIG. 1, and when the rider grips the operating lever 14, the working arm 14a pushes the piston 5. The piston 5 is pushed toward the bottom of the cylinder hole 3 while compressing the return spring 13 of the hydraulic chamber 27 , and the primary cup 8 a closes the relief port 11 to allow communication between the hydraulic chamber 27 and the reservoir 4. Is shut off, the hydraulic chamber
The hydraulic fluid in 27 rises in pressure. The hydraulic fluid pressurized in the hydraulic chamber 27 is supplied to the front brake or the clutch through the outlet port 15 to hydraulically operate the front brake or the clutch.

The spring adjusting plate 20 has a center
A female screw hole 20a is formed through the shaft, and a plurality of
A liquid passage hole 20b is formed, and a screw hole is formed in the female screw hole 20a.
The shaft 21a of the rod 21 is screwed. The screw rod 21
Male screw 21b is spring-adjusted on the base end side of shaft 21a.
The shaft portion 21 is formed with a length necessary for the movement of the plate 20.
a, a flange-like stopper 21c is provided
ing. The small diameter shaft that is continuous with the tip of the shaft 21a
21d is formed, and the tip surface of the small diameter shaft portion is provided with a tool.
A hanging groove 24 is provided.

The spring adjusting plate 20 has a female screw hole.
20a is screwed with a male screw 21b of the shaft portion 21a.
1 and a retaining ring 25 is fitted to the end of the male screw 21b.
Wear it and keep it. Spring adjustment plate 20
The attached threaded rod 21 is removed from the small diameter male thread 21d
Into the dovetail hole 3 so that the distal end side of the shaft portion 21a is inside the bottom wall 2a.
Insert the stopper 21c into the through hole 23
The bottom wall 2a is brought into contact with the inner surface of the bottom wall 2a,
Lock nut 17 is attached to the small diameter male screw 21d protruding outward.
And the lock nut 17 and the stopper 21c are
The bottom wall 2a is sandwiched and attached.

A sealing material 26 is provided in the through hole 23 of the bottom wall 2a.
The through hole 23 and the shaft portion 21a
It is sealed in a liquid-tight manner with the sealing material 26 between the tip side and
As described above, the hydraulic chamber 27 is connected to the primary cup 8a.
And a sealing material 26 to seal in a liquid-tight manner. Construction of hydraulic chamber 27
The fluid is supplied to the plurality of liquid holes 2 of the spring adjustment plate 20.
0b to the front and back of the spring adjustment plate 20
It can be freely distributed, and the outlet
The port 28 is provided between the bottom wall 2a and the spring adjustment plate 20.
Is located closer to the bottom of the hydraulic chamber 27. Sprit
Of the return spring 13
One end 13a is fitted and screw rod 21 is rotated.
At this time, make sure that the spring adjustment plate 20 does not rotate
I have to.

The tool groove 24 of the screw rod 21 is provided with an operation lever.
-14 gripping resistance when the gripping operation is performed, that is, the lever fee
If you want to change the ring, set the return spring 13
Used to change the load. Operation lever 14
When changing the lever feeling of
Loosen the lock nut 17 screwed into the tip 21d of the
Hook a tool into the tool groove 24 on the surface
When rotated, the screw rod 21 is rotated in place at the position shown in FIG.
Rotation, spring adjustment play that received rotation of screw rod 21
G only the cylinder hole 3 moves to the bottom side or the opening side.
To move the spring adjusting plate 20 and the piston 5
Set the load of the return spring 13 by expanding and contracting the distance
To change.

For example, a soft lever feeling
If you want to obtain, adjust the spring adjustment plate 20
Move to the bottom side of the dowel hole 3 to increase the distance with the piston 5
Then, the return spring 13 extends and the piston 5
The spring force acting on the operation lever 14 from the
If you want to make the bar feel harder,
Move the adjusting plate 20 to the opening side of the cylinder hole 3,
When the distance from the piston 5 is reduced, the return spring 1
3 is reduced, and the resilience to the operation lever 14 is increased.
It is.

The maximum of the spring adjusting plate 20
The amount of movement is such that the snap ring 25
The end of the wedge rod 21 is closer to the tip, and the end of the male screw 21b is
The screw rod 21 rotates in place, and the spring
If the movement of the adjustment plate 20 cannot be seen from outside
Also, the spring adjustment plate 20 falls off the screw rod 21
There is no danger.

Note that the spring adjustment plate 20 is
When moving to a position that overlaps the outlet port 28
Connect the outlet port 28 to the spring adjustment plate
20 so as not to obstruct the flow of hydraulic fluid,
Out the liquid passage hole 20b of the spring adjustment plate 20
It is formed in alignment with the opening of the let port 28.

Next, the second to fourth embodiments of the present invention will be described with reference to FIG .
7 will be described with reference to FIG. The same as the first embodiment
The same reference numerals are given to the components and the detailed description is omitted.
Abbreviate.

In the second embodiment shown in FIGS.
The ring adjusting plate 30 and the screw rod 31 are screwed together.
And a large-diameter female screw hole is formed in the bottom wall 2a of the cylinder hole 3.
32 is formed, and a plug 33 is screwed therein.
The rotation of the adjustment plate 30 is restricted by the plug 33.
At the same time, the tip side of the screw rod 31 is supported on the plug 33.
Let me.

The spring adjusting plate 30 is a cylinder
A plate body 30a inserted into the hole 3 and the plate
Small diameter projecting from the body 30a toward the bottom of the cylinder hole 3.
And a boss 30b. Spring adjustment play
The inside of the cylinder 30 is open at the bottom of the cylinder bore 3.
Screw hole 30c and large-diameter hole 30d opening on the piston side
And a small-diameter insertion hole 30e connecting the two holes 30c and 30d.
Are continuously provided, and on the outer periphery lower edge of the boss portion 30b,
The ridge 30f for stopping rotation is aligned with the boss 30b in the axial direction.
The body is formed. Outer circumference and insertion hole of plate body 30a
30e, sealing materials 34 and 35 are fitted, and the liquid
The pressure chamber 27 includes a piston 5 and a spring adjustment plate 30.
Is defined between

The shaft 31a of the screw rod 31 has a spring
Male screw 3 screwed into female screw hole 30c of adjustment plate 30
1b is screwed with the lock nut 17 outside the bottom wall 2a.
Male screws 31c are formed at both ends, and both male screws 31b, 3
During 1c, a flange-shaped scan stopper 31d is provided
I have. A shaft on which the spring adjustment plate 30 is mounted
The spring adjustment plate 30 is inserted into the base end of the portion 31b.
A small-diameter shaft portion 31e inserted into the through hole 30e is protruded,
A small-diameter shaft portion protruding from the large-diameter hole 30d of the adjustment plate 30
The retaining ring 25 is fitted to the tip of the
A tool is attached to the tip of the shaft portion 31a on the screwing side of the nut 17.
A hanging groove 36 is provided.

The plug 33 has a cylindrical main body 33a.
It is a flanged plug having a flange 33b at one end.
A male screw 33c is formed on the outer periphery of the base of 3a,
Are the large-diameter hole 33d and the medium-diameter hole 3 from the tip side of the main body 33a.
3e and a small diameter hole 33f are continuously provided. Also, the main body 33
On the lower surface on the distal end side of a, the length is approximately the same as that of the large-diameter hole 33d.
A split groove 33g is provided.

The plug 33 is formed by connecting the male screw 33 c to the bottom wall 2.
a into the female screw hole 32 of FIG.
The flange 33b is disposed so as to protrude into the cylinder hole 3 and the bottom wall 2a
Is attached to the bottom wall 2a by pressing against the outer surface of the bottom wall 2a. Plug 3
In the large diameter hole 33d of the third, the spring adjustment plate 30
The boss portion 30b is inserted, and the ridge 30f of the boss portion 30b is inserted.
Into the slot 33g for spring adjustment play
The rotation of the gate 30 is regulated. Medium hole 33e of plug 33
Accommodates a stopper 31d of the screw rod 31 and
The shaft portion 31a of the screw rod 31 is inserted into the diameter hole 33f.
At the same time, it protrudes outward from the bottom wall 2a from the small diameter hole 33f.
The lock nut 17 is screwed onto the external thread 31c of the threaded rod 31.
Be worn.

In the third embodiment shown in FIG. 4 and FIG.
Spring adjusting plate 30 and screw rod 31 of the second embodiment
And the plug 33 are partially changed in shape and used.
Between the flange 33b of the plug 33 and the bottom wall 2a.
And a small diameter hole 33f of the plug 33
The sealing member 41 is attached to the shaft portion 31a of the screw rod 31 inserted into the
And the pin with the spring adjustment plate 30
Between the ton 5 and the bottom wall 2a of the cylinder hole 3
And

Inside the spring adjustment plate 30,
A female screw hole 30g and a large-diameter hole 30h are provided continuously,
A liquid through hole 30i is provided on the outer periphery of the rate main body 30a, and a boss is provided.
A liquid passage hole 30j is provided on the outer periphery of the portion 30b.
Are provided in the axial direction of the
As a result, the hydraulic fluid in the hydraulic chamber 42 passes through the fluid communication holes 30i and 30j.
And can be distributed to the front and rear parts of the spring adjustment plate 30.
I am trying to.

One of the liquid holes 30j of the boss 30b has
Folding piece 30k for retaining is inside the other side from the open end on one side
The plug 33 is inclined toward
The main body 33a has a small diameter engaging pin 43 and a large diameter hole 33d.
It protrudes toward. This engagement pin 43 is
The boss 30b of the tuning adjustment plate 30 is
When inserted into the diameter hole 33d, the liquid passage provided with the folded piece 30k
While folding the piece 30k into the hole 30j,
Plugged into. The spring adjustment plate 30
The rotation is prevented by the engagement between the engagement pin 43 and the liquid through hole 30j.
After passing through the engagement pin 43, the tip is
j To the folded piece 30k that comes in contact with the other side and returns to the original shape
Therefore, the engagement pin 43 is prevented from coming off.

The screw rod 31 is a male screw 31 of the shaft portion 31a.
b, 31c, the above-described sealing material 41 is fitted,
The small diameter shaft portion 31e and the retaining ring 25 used in the second embodiment
The spring adjustment plate 3 is omitted from the embodiment.
The amount of movement in the direction of the piston 0 is restricted by the engagement pin 43.
This is performed by contact with the strip 30k.

FIGS. 6 and 7 show a modification of the third embodiment.
In the fourth embodiment, the lower wall 2c of the cylinder hole 3
The bolt 50 is screwed. Tip 50 of locking bolt 50
a shows the spring adjustment play with the piston 5 of the hydraulic chamber 42.
30 and projecting from the tip 50a with a spring
Bifurcated piece 30 protruding from piston side of adjustment plate 30
m, 30 m, the spring adjustment plate 30
Rotation of the piston and the amount of movement in the piston direction.
ing.

In the second and third embodiments, the switch is
Plugs to prevent rotation of the pulling adjustment plate and restrict travel distance
But the spring adjustment plate is
As in the first embodiment, using a return spring,
In the fourth embodiment, the displacement of the spring adjustment plate is restricted.
The engagement is performed by the engagement between the locking bolt and the fork.
The plug can be omitted.
No. In particular, in the fourth embodiment, the combination of the locking bolt and the fork
To stop and move the spring adjustment plate
Both quantity controls can be performed simultaneously.

In the first invention, a strike provided on the threaded rod is provided.
The spring comes into contact with the bottom wall of the cylinder hole and the plug,
The amount of movement of the tuning adjustment plate toward the bottom of the cylinder hole.
In addition to the flange shown in the embodiment, a screw rod
Alternatively, a projection may be provided or a locking pin may be provided.

[0037]

According to the present invention, a bar handle vehicle is provided.
According to the hydraulic master cylinder of
By rotating the projecting screw rod, the piston
Return splice that acts as grip resistance on the operating lever
Change the brake set load by changing the brake set load.
Bar feeling according to the rider's physique and taste
Can be set freely. In this way, the break
Move the clutch and clutch levers to
By setting it to wheeling, you can
Free handling makes it possible to increase driving safety.
That each rider can handle.
-The types of steering wheel vehicles can be increased.

[Brief description of the drawings]

FIG. 1 is a sectional front view of a hydraulic master cylinder showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a hydraulic master cylinder showing a second embodiment of the present invention.

FIG. 3 is a sectional view taken along line III-III of FIG . 2;

FIG. 4 is a hydraulic master cylinder showing a third embodiment of the present invention .
Main part sectional view of

FIG. 5 is a sectional view taken along line VV of FIG . 4;

FIG. 6 shows a hydraulic master cylinder according to a fourth embodiment of the present invention .
Main part sectional view of

FIG. 7 is a sectional view taken along line VII-VII of FIG . 6;

[Explanation of symbols]

1: hydraulic master cylinder, 2: cylinder body, 2a:
Bottom wall of cylinder hole 3, 3 ... cylinder hole, 5 ... piston ,
8a: Primary cup, 8b: Secondary cup, 9
... seal materials such as O-rings, 11 ... relief ports, 12
... supply port, 13 ... return spring contracted between piston 5 and spring adjustment plate 20,
Reference numeral 14 denotes an operating lever, 14a an operating arm of the operating lever 14 for pushing the piston 5, 17 a lock nut, 20 a spring adjusting plate, 20a an internal thread hole of the spring adjusting plate 20, and 20b an spring adjusting plate 20.
Liquid through hole, 21 ... screw rod, 21a ... shaft part of screw rod 21,
21b, 21d: male screw formed on the shaft 21a; 21c: flange-shaped stopper integrally formed on the shaft 21a; 23: through hole formed on the bottom wall 2a of the cylinder hole 3; Tool hanging groove, 25: retaining ring, 26: sealing material, 27: hydraulic chamber, 28: outlet port, 3
0: spring adjustment plate, 30a: plate body,
30b: small diameter boss, 30c: female screw hole in spring adjustment plate 30, 30d: large diameter hole in spring adjustment plate 30, 30e: spring adjustment plate 30
Inner hole, 30f: ridge for preventing rotation, 30g: female screw hole of spring adjustment plate 30, 30h: large diameter hole of spring adjustment plate 30, 30i, 31j: liquid through hole of spring adjustment plate 30, 30k ... Liquid through hole 30j
Folding piece formed on one of the above, 30m, 30m
... bifurcated piece, 31 ... screw rod, 31a ... shaft part of screw rod 31,
31b, 31c: external thread of the threaded rod 31, 31d: flange-shaped stopper integrally formed with the threaded rod 31, 31e ...
A small-diameter shaft portion protruding from the shaft portion 31a;
Female screw holes formed in the bottom wall 2a of the
Reference numeral 3 denotes a plug, 33a denotes a main body of the plug 33, 33b denotes a flange integrally formed with the main body 33a of the plug 33, 33c
... male screw of plug 33, 33d ... large-diameter hole of plug 33,
33e: medium-diameter hole of the plug 33; 33f: small-diameter hole of the plug 33; 33g: slot of the plug 33;
Sealing material, 36: tooling groove, 40, 41: sealing material,
42 ... hydraulic chamber, 43 ... engaging pin, 50 ... locking bolt, 5
0a: tip of locking bolt 50

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-106671 (JP, A) JP-A-3-76793 (JP, U) JP-A-63-135011 (JP, U) JP-A-4-134 31686 (JP, U) Japanese Utility Model Showa 62-161095 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62L 3/00-3/02

Claims (1)

(57) [Claims] 1. A hydraulic chamber is defined at the bottom of a cylinder hole by inserting a piston into a bottomed cylinder hole formed in a cylinder body while leaving a bottom wall, and compressed into the hydraulic chamber. The return spring springs the piston toward the opening of the cylinder hole, and pushes the rear end of the piston disposed on the opening side of the cylinder hole with an operation lever pivotally supported by the cylinder body. In a hydraulic master cylinder for a bar handle vehicle, which pressurizes hydraulic fluid in the hydraulic chamber, a through hole is formed in a bottom wall of the cylinder hole, and a through hole is formed between the bottom wall of the cylinder hole and the piston. A spring adjusting plate is provided, and a screw rod is screwed into the spring adjusting plate.
A stopper is protrudingly provided on the outer periphery of the threaded rod , a screw rod is inserted into the through hole, a tip of the threaded rod is projected outwardly of a bottom wall of the cylinder hole, and a lock nut is threaded on the tip of the threaded rod. A hydraulic master cylinder for a bar handle vehicle, wherein the return spring is contracted between the spring adjusting plate and the tip of the piston.