JPS62175282A - Seal structure of operating cable for motor bi- and tri-cycle - 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 [Field of Industrial Application] The present invention relates to a structure for sealing between an outer cable end and an inner cable of a throttle cable, for example, in a motorcycle or a scooter-type three-wheeled vehicle, and particularly relates to a structure for sealing between an outer cable end and an inner cable of a throttle cable. related to improvements in durability and durability.

[Conventional technology]

Conventionally, in a motorcycle or a scooter-type three-wheeled vehicle, an operation cable such as a throttle cable or a brake cable is used to transmit the movement of a throttle grip 5 attached to a steering handle or a brake lever to a carburetor or a braking device. There is. This operation cable is
Although the inner cable is slidably inserted into the outer cable, if rainwater or the like enters through the gap between the end of the outer cable and the inch cable, it may cause rust or malfunction.

Conventionally, as a sealing structure to prevent such problems such as rust, a structure in which a bellows-shaped rubber waterproof boot is fixed at one end to the outer cable and at the other end to the inner cable, has been proposed. Alternatively, there is a structure in which one end of a rubber waterproof cover is fixed to the outer cable and the other end is in sliding contact with the inner cable.

[Problem that the invention seeks to solve]

Although the structure in which the above-mentioned waterproof boots are attached can ensure sealing performance and durability, there are problems in that the bellows-like shape requires a large installation space and increases costs. On the other hand, the structure in which the rubber waterproof cover is provided is advantageous in terms of compactness and low cost, but there is a problem in terms of durability because the sealing function of the sliding contact portion with the inner cable deteriorates significantly over time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a compact and highly durable sealing structure for operating cables for motorcycles and tricycles.

[Means for Solving the Problems] The present invention provides a seal structure for operating cables for motorcycles and tricycles, which includes a cylindrical seal member made of resin, the seal portion of which is in sliding contact with the inner cable, and the flange portion of which is in sliding contact with the outer cable. A cylindrical cam member made of an elastic material is attached to the inch cable so as to be in contact with the end face of the cable, and its base part is fitted with the outer cable, its holding part is tightly fitted with the seal part, and the above-mentioned It is characterized in that the flange portion is mounted so as to be sandwiched between the end face of the outer cable.

Here, as the resin for the sealing member, for example, polyacecool, which has excellent wear resistance and sealing properties, can be selected.
Further, the sealing member is selected from a material having elasticity such as rubber.

[Effect]

In the seal structure of the operating cable for motorcycles and tricycles according to the present invention, the resin seal member is brought into sliding contact with the inner cable for sealing, so compared to the case where the rubber cover is brought into sliding contact for sealing. , the wear resistance is greatly improved, the deterioration of the sealing function over time can be greatly reduced, and the durability is improved. In addition, since the sealing member is inserted between the inner cable and the cover member made of a cylindrical elastic member fixed to the outer cable, it is more compact than the conventional bellows-shaped waterproof boot. Since the structure is such that the seal member is held between the cover member made of an elastic member and the end face of the outer cable, the seal member can be easily assembled and the ease of assembly will not deteriorate.

Further, in this case, although the seal member is held by the elasticity of the cover member, the movement of the inner cable in the direction perpendicular to the axis is not inhibited by this seal member.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 are diagrams for explaining a seal structure of an operating cable of a scooter-type motorcycle according to an embodiment of the present invention, and this embodiment is an example in which the seal structure is applied to a throttle cable. In the figure, reference numeral 1 denotes a scooter-type motorcycle, and a front fork 4 supporting a front wheel 3 is pivotally supported at the front end of a body frame 2 of the motorcycle 1, and a steering wheel is mounted at the upper end of the front fork 4. A handle 5 is attached, and an engine unit 7 integral with a swing arm that supports a rear wheel 6 is pivotally supported approximately at the center shaft. Further, a range shield 8 is attached to the front part of the body frame 2, a footrest Fi 9 is attached to the lower center, a seat 10 is attached to the upper rear part, and a side cover 11 is attached below this.

A throttle grip 1 is provided on the right end of the steering handle 5.
1 is rotatably fitted, and the grip 11 is connected to a carburetor [2] attached to the engine unit 7 by a throttle cable [3]. This throttle cable 13 is composed of an outer cable 14 and an inner cable 15, and includes a
Steering shaft cylinder 2a5 that pivotally supports the front fork 4 body frame 2
The wires are routed along the line, and key points are fixed with banding bands 26. The outer cable 14 is a flexible spiral tube whose outer periphery is coated with resin, and the inner cable 15 is a wire lobe made by twisting together a large number of small diameter wires, and is slidable inside the outer cable 14. It has been inserted.

A guide pipe 14a made of steel is connected to the end of the outer cable 14 on the side connected to the throttle grip 11. A band-like support bracket 14b is fixed to the guide pipe 14a, and the support bracket 14b is fixed to the lower surface of the throttle housing 16 with bolts. This throttle housing 16
is attached to the inside of the throttle grip 11 of the steering handle 5, and the throttle guide portion 16a formed at the outer end of the housing 16 includes the throttle grip 1.
A cable engaging portion 11a formed at the inner end of the cable is rotatably fitted. The inner cable 15 projects outward through the guide pipe 14a of the outer cable 14, and a cylindrical engagement piece 15a is attached to the tip thereof by brazing or machining.
is engaged with the cable engaging portion 11a. Accordingly, when the throttle grip 11 is rotated, the inner cable 15 is wound up and the throttle valve of the carburetor 12 is moved up and down.

Then, the inner cable 15 and the outer cable 14 are
A waterproof seal 17, which is a sealing member, is attached to the boundary between the end and the end. This waterproof seal 17 is formed using a resin with high wear resistance and sealing properties, such as Duracon (trade name) made of polyacetal, and includes a cylindrical seal part +7a and a flange integrally formed at the lower end of the seal part +7a. It consists of a portion 17b. The inner surface of the seal portion 17a is in sliding contact with the inner cable 15, and the flange portion 17b is in contact with the upper end of the guide pipe 14a of the outer cable 14. A waterproof cover 18, which is a cover member, is attached to a portion of the guide pipe 14a above the support bracket portion 14b. This waterproof cover 18 is made of rubber and has a cylindrical shape, and is fitted onto the guide pipe 14a with a predetermined tightening margin, and a flange portion 18a integrally formed outward at the lower end is attached to the upper surface of the support bracket 14b. are in contact. Further, a holding part 18b is integrally formed inwardly at the upper end of this waterproof cover 18, and this holding part 18b tightly fits into the seal part 17a of the waterproof seal 17, and due to its elasticity, the flange part 17
b is held between the guide pipe 14a.

Next, the effects of this embodiment will be explained.

To assemble the sealed portion of the throttle cable 13 of this embodiment, the inner cable 15 is inserted into the guide pipe 14a to which the support bracket 14b is fixed, the waterproof seal 17 is fitted onto the cable 15, and then the waterproof seal 17 is fitted onto the cable 15. The cover 18 is fitted onto the upper end of the guide pipe 14a, and the flange portion 18a of the cover 18 is brought into contact with the upper surface of the support bracket 14b. Then, the waterproof seal 17 has its flange portion 17b connected to the upper end of the guide pipe 14a and the waterproof cover 18.
The sealing portion 17a comes into sliding contact with the inner cable 15, and the sealing portion 17a is held in close contact with the holding portion 18b of the waterproof cover 18. Finally, the retaining piece 15a is fixed to the upper end of the inner cable 15 by brazing or machining.

The throttle cable 13 having the above structure is connected to the throttle cable,
To connect to the inner cable 11, insert the retaining piece 1 of the inner cable 15.
5a to the cable engaging portion 11a, and the throttle housing 16 to its throttle guide portion 16.
a is fitted into the cable engaging part 11a,
Finally, the support bracket 14b for the throttle cable 13
is bolted and fixed to the throttle housing 16.

In the above state, when the throttle grip 11 is rotated, the inner cable 15 is wound up onto the cable engaging portion 11a, thereby opening and closing the throttle valve of the carburetor 12, thereby making it possible to adjust the engine output. In this case, in this embodiment, the Duracon waterproof seal 17 is attached so as to be in sliding contact with the inner cable 15, and this is fixed with the rubber waterproof cover 18, so that the inner cable 15
5 and the guide pipe 14a of the outer cable 14, and this waterproof seal 17 has higher abrasion resistance than a conventional rubber waterproof cover with a sliding structure. is high, and durability can be improved accordingly. Furthermore, since the waterproof cover 18 is slightly larger than the guide pipe 14a, it is much more compact than a conventional bellows-shaped waterproof boot, and the mounting space can be reduced.

Further, when installing the waterproof seal 17, the waterproof seal 17 can be installed and held by simply installing the cylindrical waterproof cover 18, and the increase in man-hours due to the installation of the waterproof seal 17 is small. Furthermore, since the waterproof seal 17 is held by the elasticity of the waterproof cover 18, the movement of the inner cable 15 in the axis-perpendicular direction is not inhibited by the waterproof seal 17.

Although the throttle cable 13 has been described in the above embodiment, the present invention is not limited to the throttle cable.
It can be applied to any operating cable, such as a brake cable or clutch cable, as long as it consists of an inner cable and an outer cable. Further, in the above embodiment, a scooter type motorcycle has been described, but the present invention can also be applied to other types of motorcycles, and further to a scooter type tricycle having one front wheel and two rear wheels.

〔Effect of the invention〕

As described above, according to the seal structure of the operating cable for motorcycles and tricycles according to the present invention, the resin seal member is attached to the inner cable in sliding contact, and the elastic cover member is attached to the end of the outer cable and the seal member. Since the sealing member is held by the cover member and the end of the outer cable, the sealing part between the inner cable and the outer cable can be made compact, and the durability of the part can be reduced. It has the effect of improving sex.

[Brief explanation of drawings]

1 to 5 are diagrams for explaining the seal structure of an operation cable for a scooter-type motorcycle according to an embodiment of the present invention. FIG. 1 is a sectional view of the main part thereof, and FIG. A plan view of the grip part, Figure 3 is m in Figure 2.
-m line sectional view, FIG. 4 is a side view showing the wiring state of the throttle cable, and FIG. 5 is a side view of a scooter type motorcycle to which the above embodiment is applied. In the figure, 1 is a scooter type motorcycle, 13 is a throttle cable (operation cable), 14 is an outer cable, 14a is a guide pipe (end of the outer cable), 1
5 is inch cable, 17 is waterproof seal (sealing member)
, 17a is a seal portion, 17b is a flange portion, 18 is a waterproof cover (cover member), and 18b is a holding portion.

Claims (1)

[Claims] (1) In a motorcycle or tricycle operating cable in which an inner cable is slidably inserted into a flexible cylindrical outer cable, sealing is provided between the end of the outer cable and the inner cable. The structure is such that the inner cable is fitted with a cylindrical sealing member made of resin,
The sealing member includes a sealing portion whose inner surface is in sliding contact with the outer periphery of the inner cable, and a flange portion which is integrally formed with the sealing portion and comes into contact with the end surface of the outer cable, and an elastic member is attached to the outer periphery of the end of the outer cable. A cylindrical cover member made of a material is press-fitted, and a holding portion is formed at the tip of the cover member to tightly fit with the outer circumferential surface of the seal portion, and the holding portion and the end face of the outer cable are connected to the outer cable. A seal structure for operating cables for motorcycles and tricycles, characterized by sandwiching the flange portion of the seal member.