JPS5885779A - Automatic regulator for idle stroke of operating wire in brake operating device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic play stroke adjustment device for an operating wire in a brake operating device, which is mainly applied to a brake operating system of a motorcycle.

In general, in motorcycles, etc., the operating wire that connects the brake operating lever and the brake device and transmits the operating force of the brake operating lever to the brake device may cause wear of the brake shoes in the brake device or As the wire itself stretches, the idle stroke of the operating wire gradually increases, which is undesirable since it may change the feel of the brake operation to some extent.

Therefore, the present applicant first proposed 6. When the play stroke of the inner wire of the operating wire exceeds a predetermined amount.

An automatic adjustment device for the play stroke of the operating wire has been proposed which can automatically adjust this.The present invention is a further improvement of this device, in which the operating wire is adjusted in a housing that forms part of the outer wire. When the play stroke exceeds a predetermined amount, the inner wire in the housing is automatically shortened in conjunction with the brake operation of an operating member such as a brake operating lever, and the play and stroke of the operating wire are automatically adjusted appropriately. The length of the outer wire of the operating wire, that is, the arrangement of the outer wire must not be changed at all. The main objective is to provide an automatic play stroke adjustment device for operating wires.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the device of the present invention is applied to an operating wire of a brake device of a motorcycle will be described below with reference to FIGS. 1 to 8.

In the following examples, "elongation of the inner wire Wi" includes elongation of the inner wire itself and substantial elongation of the inner wire FL caused by wear of the brake shoe (not shown y) in the drum brake device B.

In FIG. 1.2, a brake operating lever Lα is pivotally supported on a lever holder Ha of a steering handle H of a motorcycle;
Thereafter, the actuating member Lh pivotally supported by the brake panel Bα of the drum brake device B provided on the wheel Wr is connected via the operating wire W. As usual, the operating wire W is composed of a 7 outer wire F(+) and an inner wire Wi inserted therein.Both ends of the inch wire Wi are connected to the brake operating lever Lα and the operating member Lb, respectively. Both ends of the outer wire WO are supported by a fixed lever holder Ha and a brake panel Bα.

An automatic adjustment device A is interposed in the middle of the operation wire W, and its structure will be explained below with reference to FIGS. 3 to 8.

The outer wire F (+ indicates the connection between the first outer wire Ii'O2 on the brake operating lever Jα side and the second outer wire l\O of the operating member Lh1 (jl)
8, and a housing HTL constituting a part of the outer wire JFO is interposed between them. ) and a cylindrical second housing 2 which is inserted and supported so as to be movable in the axial direction. In addition, the inner wire pt of the operating wire W is also connected to the first inner wire F of the brake operating lever holder on the way.
z s and the second inner wire F of the operating member L hlljl
Ll, and both ends thereof are inserted into the first housing 1 and the second .

The housing HtL is supported by a suitable support means on the body of the motorcycle so as not to move in the axial direction of the operating wire W. Outer end wall of 1st housing 1 (3rd, 4th
The inner end of the first outer wire JP"0□ on the side of the brake operating lever La is connected non-rotatably to the outer end wall of the second housing 2 (the right end wall in Figure 3.4). The inner end of the second outer wire Wo on the operating member Lb side is unrotatably connected to the 17th outer wire Fo.
, the inner end of the first inner wire WL& is inserted into the 171st Uzi-Fugu 1 and a cylindrical actuator 5 (described in detail later) is fixed therein, and the 27th outer wire JP'o, Reed 2 inserted inside
．． The inner wire is fixed by caulking or the like. Both sides of the inch bolt 3 are chamfered (see FIG. 7), and the second bolt 3 is supported so that it cannot rotate. Second housing 2
An adjuster boss 4 (see Fig. 5), which has both sides chamfered to have an oval cross-sectional shape and has a left female threaded hole 4a, is rotatably inserted and supported inside the adjuster boss 4. The operating element 5 is rotatably connected to one end (the left end in FIGS. 3-4), and the inner bolt 3 is screwed into the other end. The inner bolt 3 and the adjuster boss 4 constitute the telescopic mechanism α in the present invention.

The inner end of the adjuster boss 4 has ratchet teeth 6 on the outer periphery.
The adjuster wheel 6 formed with a is fitted so that it can rotate together with the adjuster boss 4 (see FIG. 8).
Furthermore, a stopper plate 7 is rotatably fitted to the inner end of the second housing 2 (see FIG. 5). A stopper tongue piece 7α and a notch recess 7A are formed in the stomp plate 7, and the stopper tongue piece 7a has a first /%
It collides with a stopper 8 formed on the housing 1 to further inhibit clockwise rotation than the state shown in FIG. 9h is pressed into engagement. Further, a disc spring 10 is interposed between the inner end surface of the second housing 2 and the inner wall side of the first housing 1, and the elastic force of the disc spring 100 causes the 271st housing 2 and the stopper plate T to move outward (3rd and 4th right side of the figure), and
A gap δ is formed between the inner wall side of the song 1 and the stopper plate 7.

The actuator 5 fixed to the inner end of the first inner wire Wh has one side chamfered as shown in FIG. A conical inclined surface 5α is formed at its outer end (left end in figure vK2.3).

Close to the actuator 5, the middle part of a bell crank-shaped adjustment lever 9 is pivotally supported on the first housing 1 by a lever pin 11 (see FIG. 6), and the temperature adjustment lever 9 is mounted on one side of the lever pin 11 (see FIG. 6). A first arm 9α and a second arm 9b extend integrally on the other side, and the tip of the first arm 9α has a receiving piece 12 facing the inclined surface 5α of the actuator 5.
is established.

The second arm 9b is longer than the first arm 9a and extends across the adjuster wheel 6 and stopper plate 7, and is longer than the first arm 9a.
It is engaged with one of the ratchet teeth 6a of the stopper plate 7, and is press-engaged with the cutout recess 7h of the stopper plate 7. Further, the other end of a return spring 13 whose one end is tied to the first housing 1 is locked at the base of the second arm 9b, and the tensile force of the return spring 13 moves the adjustment lever 9 counterclockwise in FIG. Bias it so that it rotates in the direction.

Since the second arm 9b of the adjustment lever 9 is engaged with the stopper 8 of the first housing 1 via the stopper plate 7, the non-operating position of the adjustment lever 9 is in the normal position as shown in Figure 3. A gap δ is formed between the receiving piece 12 and the inclined surface 5α of the actuator 5.

The adjustment lever 9, the adjuster wheel 6, and the return spring 13 constitute an operating mechanism of the telescopic mechanism α.

One end wall of the first housing 1 and the first inner wire F o
The space between H and the space between the other side wall of the first housing 1 and the second housing 2 are covered by telescopic boots 14 and 15, respectively.

Next, the operation of the first embodiment of the present invention constructed as described above will be explained. Now, the drum-type pre-operating lever Lα is rotated to operate the first inner wire Wi unit of the operating wire W.
When the vehicle is towed 2 to the left in FIGS. 3 and 4, the drum type brake device B can be actuated as usual to brake the rear wheels Wr.

By the way, in a state where the play stroke accumulation of the operation wire P is appropriate, the inner wire Ili is
When pulled to the left in FIGS. 2 and 3, the inclined surface 5a of the actuator 5 hits the receiving piece 12 of the first arm 9α of the adjustment lever 9, and the adjustment lever 9 is rotated clockwise. At this time, the second arm 9h retreats through the notched recess 7b (moves downward in FIG. 5), but the amount of retreat is less than one pitch of the ratchet teeth 6α of the adjuster wheel 6. Therefore, by releasing the brake operating force, the leftward pulling force of the inner wire JFL is released, and the adjusting lever 9 rotates counterclockwise due to the tensile force of the return spring 13, and the second arm 9b moves forward (see Fig. 5). Even if the inner wire Wi is moved upward), the adjuster wheel 6 is not rotated (adjustment for the elongation of the inner wire Wi is not performed).

As the brake operation is repeated, the idle stroke amount during the brake operation gradually increases (becomes) due to the elongation of the inner wire Wi (including elongation of the inner wire Wi itself and wear of the brake shoes).

Now, when the elongation becomes large enough to impede brake operation, the amount of retraction of the second arm 9b when the adjustment lever is rotated 9 degrees clockwise via the actuator 5 due to the pull of the inner wire f17i is as follows.

This is one pitch or more of the ratchet teeth 6α of the adjuster wheel 6. Therefore, the second arm 9b rotates the rotatable stopper plate T slightly in the counterclockwise direction in FIG. When the brake operation is released and the inner wire Wi is returned to its original position by the spring force of a return spring (not shown) in the brake device B, the adjustment lever 9 is rotated counterclockwise by the tensile force of the return spring 13. At that time, the second arm 9
Since h is engaged with the ratchet tooth 6a one position before,
The adjuster wheel 6 is rotated clockwise in FIG. 5 by one pitch, and the adjuster boss 4 is also rotated by the same amount in the same direction. At this time, the stopper tongue piece 7α of the stopper plate 7 abuts against the stopper 8 and further rotation in the clockwise direction (FIG. 5) is prevented, so the stopper plate 7 is rotated by one pinch or more of the adjuster wheel 6. There's nothing to do. When the adjuster wheel 6 is rotated, the adjuster boss 4 also rotates in the same direction. Then, the inner bolt 3 screwed into the adjuster boss 4 with a left-hand thread does not retract into the adjuster boss 4, shortens the effective length of the inner wire Wi, and adjusts the idle stroke amount due to the elongation of the inner wire Wi.

When the adjustment lever 9 is rotated by pulling the inner wire Wi, as long as the amount of movement of the second arm 9b is one pinch or more of the ratchet teeth 6α of the adjuster wheel 6, the above adjustment is repeated and the play of the inner wire Wi is increased. Adjust the stroke amount appropriately.

By the way, even though the play stroke amount of the operating wire W is appropriate, if the brake operation input is too large and the inch wire No. 2 is forcibly pulled, the automatic adjustment mechanism A works to adjust the operating wire W. will be over-adjusted, but the present invention prevents this over-adjustment through the following actions.

When the inner wire Wi is pulled to the left with an excessive force than the normal brake operation input, the inner wire Wi becomes strong (tensioned), so the outer wire W is pulled.

Under the compressive force in the longitudinal direction, the second housing 2 moves toward the first housing 1 (leftward in Fig. 3.4) - as a result, the spring 10 (which is not compressed by normal brake operation input) The spring force is adjusted so that the gap δ between one side of the first housing 1 and the stopper plate 7 is compressed.

The stopper grate 1 is pressed against one side of the first housing 1, and its rotation is prevented.

On the other hand, due to the pull of the inner wire IPi, the adjustment lever 9 rotates via the actuator 5 against the spring force of the return spring 13, and its second arm 9b also moves back (the fifth (move downward in the figure). In this case, even after the stopper grate 7 is locked, if the inner wire Wi is pulled (towed), the brake device B and the operating wire W
With the elastic deformation of the second arm 9IIS, the notch recess 1
b, but even if the amount of retraction exceeds one pitch of the adjuster wheel 6, the lock of the stopper plate 7 prevents the second arm 9b from engaging with the two-chatch tooth 6α immediately before the second arm 9b.

When the braking force of the inner wire FL due to an excessive brake operation input is released, the adjustment lever 9 is rotated counterclockwise in FIG. Simply moving the wire forward (upward movement in Figure 4) does not rotate the adjuster wheel 6, and therefore the adjuster boss 4 is not rotated either, so the elongation of the operating wire is not adjusted and over-adjustment is prevented. Then, when the braking force is released, the stopper plate 7 moves to the right in FIG. The state will be as follows.

A second embodiment of the invention is shown in FIGS. 9-11. This second embodiment is based on the adjuster boss 4 in the first embodiment.
The amount of adjustment of the inch wire Wi is twice as much as the amount of rotation of the second housing 2f. A right female threaded hole 4h is formed in the right half thereof, and a left female threaded hole 4a is formed in the right half thereof, and a right female threaded rod 16 integrally formed on the back of the actuator 5 is screwed into the right female threaded hole 4h. The left female thread 3α of the inner bolt 3 fixed to the inner end of the second inner wire W1.2 (the same as in the first embodiment) is screwed into the left female screw hole 4α. When the adjustment lever 9 is rotated counterclockwise in FIG. 9 by the spring force of the return spring 13, and the adjuster wheel 6 is rotated in the direction of the hour hand in FIG. 11, as shown in FIG. 1O. As the inner bolt 3 is pulled into the adjuster boss 4, the adjuster boss 4 moves to the left and is pulled into the right female threaded rod 16, thereby doubling the adjustment stroke of the inner wire F& compared to the first embodiment. The amount of adjustment of the inner wire can be increased by a small rotation of the adjuster wheel 6 (
can do.

A third embodiment of the device according to the invention is shown in FIGS. 12.13. In this embodiment, the same reference numerals as in the first embodiment indicate the same members. This third embodiment is a case in which the self-adjusting device A of the first embodiment is directly attached to a lever holder Ha integrated with a steering handle H.

The lever holder Hα has a lever 20 pivoted thereon, and the first housing 1 divided into two parts is attached by a mounting pole 21, and the first
The first housing 1 is fitted into a projection 23 integrally provided on the base end surface of the housing 1, and the first housing 1 is firmly attached to the lever holder Hα.

A first inner wire VPi1 whose one end is tied to the brake operating lever Lα passes through one end wall of the first housing 1 and is inserted into the interior thereof, and the actuator 5 is fixed to its inner end. Inside the protrusion 22 is a first wire FPi,
An elastic sealing material 24 is attached to seal the sliding portion between the housing 1 and the first housing 1.

This third embodiment is completely the same as the first embodiment in other configurations, and the 12th embodiment of the brake operating lever Lα is
In relation to the brake operation by rotation in the direction of the arrow in the figure, the first
As in the embodiment, the idle stroke of the operating wire W can be automatically and appropriately adjusted, and over-adjustment thereof can be prevented.

As is clear from the above embodiments, according to the present invention, a part of the outer wire WO of the operating wire W connecting between the operating member such as the brake operating lever Lα and the player device 8 is formed at a suitable location. A housing Mu is provided in the housing Mu, and an actuator 5 is enclosed in the housing Hu and connected to the first inner wire Wh connected to the operating member.
This actuator 5 and the actuating member L of the brake device B
The inner end of the second inner wire Wh connected to Since an actuation mechanism is provided which is actuated by the child 5 and controls the contraction of the telescopic mechanism a, the idle stroke of the operating wire W can be automatically and appropriately adjusted in conjunction with the brake operation, and in particular the inner wire FL can be shortened. Since the adjustment is performed by control and the length of the outer wire WO does not change at all, the arrangement of the operating wire W does not change due to the adjustment and does not interfere with other objects.

[Brief explanation of drawings]

Figures 1 to 8 show a first embodiment of the device of the present invention. Figure 1 is a side view of a motorcycle equipped with the automatic adjustment device of the present invention, and Figure 2 shows an operating wire equipped with the device of the present invention. 3 is an enlarged sectional view taken along the line ■-■ in FIG. 2, FIG. 4 is a sectional view taken along the line fV-IV in FIG. 3, and FIG. Fig. 3 is a sectional view taken along line v-v, and Fig. 6 is a sectional view taken along line v-v. Fig. 3 is a sectional view taken along the line Vl-Vl, Fig. 7 is a sectional view taken along the line ■-■ in Fig. 3, Fig. 8 is a sectional view taken along the Ylll-■ line in Fig. The figure shows the state after adjustment. Fig. 11 is a sectional view taken along the line XI-XI of Fig. 9, Figs. 12 and 13 show a third embodiment of the device of the present invention; It is a sectional view taken along the line ■-■. 5... Actuator, a... Telescopic mechanism, h... Operating mechanism, B... Brake device, Hμ... Housing, La
... Brake operation lever, Lb ... Operating member, W.
...Operation wire, F & ... Inner wire, F t @
...First inner wire, Wh...Second inner wire, We...Outer wire Patent applicant Honda Motor Co., Ltd. Figure 1 Figure 6 Figure 81'''71 ?T! Figure 5 or Rod Figure 7

Claims (1)

[Claims] Connect the outer wire (JP'o) to the brake device (Z?).
) and an inner wire (F i ) inserted into this outer wire (l110) to connect an operating member such as a brake operating lever (La) to the operating member such as the brake operating lever (La). Brake device (B
) can now be activated. In the brake operating device, a housing (HW,
) and an actuator (5) connected to a first inner wire (Wil) provided in the brake device (B) and connected to the operating member;
h); a telescopic mechanism (a) connecting the inner end of the second inner wire (Fjt);
The operating wire (
an actuation mechanism (b) that is actuated by the actuator (5) and controls the extension/contraction mechanism (α) to shorten when the play stroke of W) exceeds a predetermined amount; Stroke automatic adjustment device.