JPS6232954Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lubricating oil supply device for a connecting portion between a brake operating lever of a bicycle or the like and a nipple fixed to the inner wire end of a Bowden cable.

For example, in a bicycle brake lever device, as shown in FIG. 1, a brake operating lever 4 is rotatably attached to a lever housing 2 fixed to a handlebar 1 via a pivot shaft 3. A rim brake device and the like were interlocked to each other via a Bowden wire 5, and the brake device was configured to be operated by rotating the lever 4. The lever 4 and the Bowden wire 5 are normally connected by inserting and locking a cylindrical nipple 7 fixed to the end of the inner wire 6 of the Bowden wire 5 into the locking hole 8 of the lever 4 so as to be relatively rotatable. was. However, if oil runs out between the nipple 7 and the locking hole 8, the relative rotation between the two will not be carried out smoothly, and unreasonable bending stress will occur at the fixed portion between the inner wire 6 and the nipple 7, causing the wire to break. There was a high possibility that this would lead to breakage. Therefore, as shown in FIG. 2, a plurality of circumferential grooves 9 are formed in the nipple 7a, and after lubricating oil is supplied to the circumferential grooves 9, a bottomed cylindrical bush 10 is fitted onto the outside, and the nipple 7a is 7
If a is inserted into the locking hole 8, relative rotation will occur between the locking hole 8 and the bush 10, and between the bush 10 and the nipple 7a, so that the locking hole 8
This has the advantage that the relative rotation between the nipple 7a and the nipple 7a is smoother, preventing breakage such as wire breakage, and that the lubricating oil is retained in the circumferential groove 9 for a long time, but the structure becomes complicated. There is a drawback. Note that 11 is a wire insertion groove.

Therefore, in view of the above problems, the present invention has a simple structure that maintains smooth relative rotation between the locking hole of the brake operating lever and the nipple at the end of the inner wire. The brake operating lever is pivotally mounted to the lever housing, and the nipple fixed to the end of the inner wire is inserted and locked into the locking hole provided in the brake operating lever so as to be relatively rotatable. The brake operating lever is provided with an oil supply hole communicating with the locking hole, and a sponge member for retaining lubricating oil is installed in the oil supply hole.

Hereinafter, the first embodiment of the present invention will be described based on the drawings. In FIGS. 3 and 4, reference numeral 21 denotes a brake operating lever, which is made of a light alloy and formed into a substantially L-shape. One end base 22 is inserted into the lever housing 23, and the pivot shaft 2 is inserted through the lever housing 23.
It is pivoted so that it can rotate freely in four directions. The lever housing 23 is fixed to a handle 26 via a fastening band 25.
An outer wire receiver 28 is inserted into a support hole 27 formed through the front wall of the outer wire receiver 28 . Reference numeral 29 denotes a Bowden wire, which consists of an outer wire 30 and an inner wire 31 inserted through the outer wire 30.
0 is supported by the receiver 28, and the inner wire 31 passes through the receiver 28 and connects to the lever housing 2.
3, and a cylindrical nipple 32 is fixed to the insertion end. The nipple 32 is inserted and locked into a circular locking hole 34 formed laterally through the corner portion 33 of the lever 21 so as to be relatively rotatable. Also, the corner part 3 of the lever 21
A split groove 35 into which the inner wire 31 is loosely inserted so as to be relatively movable is provided on the front side of 3, communicating with the locking hole 34, and a locking hole 34 and a split groove 35 are provided on the lower side of the corner portion 33. Wire insertion groove 36 communicating with
is provided. 37 is the oil supply hole, lever 2
It is provided so as to communicate with the locking hole 34 from the rear side of the corner portion 33 of 1. The oil supply hole 37 is located at a laterally intermediate portion of the lever 21 and is formed in a tapered shape, with the tapered side communicating with the circumferential surface of the locking hole 34 from the radial direction. A sponge member 40 for retaining lubricating oil is fitted into the oil supply hole 37 in a suitably compressed manner. Further, the receiver 28 is also provided with an oil supply hole 39 that communicates with the through hole 38 thereof.

The first embodiment of the present invention is constructed as described above, and when lubricating oil is appropriately supplied to the oil supply hole 37, it once penetrates and is held in the sponge member 40, and gradually seeps out from the sponge member 40. Lubricating oil is supplied between the nipple 32 and the locking hole 34. When the lever 21 is rotated appropriately, a relative rotation occurs between the nipple 32 and the locking hole 34.
Due to the relative rotation, the lubricating oil is spread over the entire outer circumferential surface of the nipple 32 and the inner circumferential surface of the locking hole 34,
Relative rotation between the two is maintained smoothly. Therefore, undue bending stress is not generated in the fixed portion between the inner wire 31 and the nipple 32, the possibility of breakage such as wire breakage is reduced, and durability is improved. Further, since the lubricating oil permeates into the sponge member 40 and is retained for a long period of time, the number of times the lubricating oil is supplied may be reduced. Moreover, it has a simple configuration and is easy to manufacture. On the other hand, if lubricating oil is appropriately supplied to the oil supply hole 39, relative sliding occurs between the through hole 38 of the receiver 28 and the inner wire 31 due to the rotating operation of the lever 21, and this inner wire 31 is pulled. Due to the relative sliding, lubricating oil is appropriately supplied between the inner wire 31 and the through hole 38, and the relative sliding becomes smoother.

FIG. 5 shows a second embodiment, in which the oil supply hole 3
7 is formed in a circular shape coaxially with the locking hole 34, and communicates with each other on one side of their circumferential surfaces. As shown in FIG. 6, a cylindrical sponge member 40 with a bottom is fitted into the oil supply hole 37 in an appropriately compressed manner, and lubricating oil is supplied to the hole 41 of the sponge member 40. .

As described above, in the present invention, an oil supply hole is provided in the brake operating lever so as to communicate with the locking hole, and a sponge member for retaining lubricating oil is installed inside the oil supply hole. By supplying lubricating oil to the sponge member, the relative rotation between the nipple and the locking hole is always maintained smoothly over a long period of time, and breakage such as wire breakage can be effectively prevented, increasing durability. You can improve. Furthermore, since the lubricating oil permeates into the sponge member and is retained for a long period of time, there is no need to frequently supply lubricating oil. Moreover, it has a simple configuration,
It has the advantage of being easy to manufacture.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional example, Fig. 2 is an exploded view showing an improved example, Fig. 3 is a side view showing the first embodiment of the present invention, and Fig. 4 is an enlarged cross-section of the main part of Fig. 3. Figures 5 and 5 are sectional views of essential parts showing the second embodiment, and Figure 6 is a perspective view of the sponge member. 21... Brake operating lever, 23... Lever housing, 29... Bowden wire, 30...
Outer wire, 31... Inner wire, 32...
Nipple, 37...Oil supply hole.

Claims (1)

[Scope of utility model registration request] Brake operating lever 2 in lever housing 23
1 is pivotally attached to the brake operating lever 21, and a nipple 32 fixed to the end of the inner wire 31 is inserted and locked in a locking hole 34 provided in the brake operating lever 21 so as to be relatively rotatable.
1, an oil supply hole 37 is provided in communication with the locking hole 34, and a lubricant retaining sponge member 40 is mounted in the oil supply hole 37.