JPH0814288A - Fitting body with boot - Google Patents

Abstract

PURPOSE:To reduce the number of assembling processes to reduce the cost in a fitting body with boot in a disc brake caliper by forming one end part of a boot from a thick part with a retainer, and integrally connecting the retainer with the thick part by a ring connecting part extended through the through- hole of the retainer. CONSTITUTION:In a fitting body 10 with boot for caliper foating type disc brake with boot which is formed of a sliding pin 11 and a pin sleeve 13, a ring boot 16 is interposed between the sliding pin 11 having a columnar protruding part 12, and the pin sleeve 13 having a pin hole 14 for fitting the columnar protruding part 12 in such a manner as to be capable of sliding and a ring groove 15 circumferentially provided on the opening edge part. This boot 16 is formed of a first end part 17 to which the columnar protruding part 12 is fitted, and a second end part 18 to be fitted to the ring groove 15, which are mutually connected by a an expansible and contractible bellows part 19. The second end part 18 has a highly rigid retainer 181 to be buried in the ring groove 15 and a thick part 185, and the both 181, 185 are integrally connected by a ring connecting part 186 formed on the thick part 185.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boot-fitted body such as a piston or a sliding pin of a disc brake caliper.

[0002]

2. Description of the Related Art Boots are provided between a piston and a cylinder as a fitting used in a caliper of a disc brake to shield the inside of the cylinder from the outside. That is, as shown in FIG. 8, the boot 93 is installed between the opening 910 of the cylinder 91 of the caliper 90 of the disc brake 9 and the outer peripheral portion 921 of the piston 92.

The boot 93 is formed of a member having good elasticity. As shown in FIG. 9, one end portion 931 is press-fitted and fixed in the outer peripheral groove 921 of the piston 92, and the other end portion 932 is a cylinder. It is fitted in an annular groove 911 that goes around the opening end 910 of the 91. The retainer 94 is fitted into the annular groove 911 to firmly fix the other end 932 of the boot 93 to the annular groove 911.
The retainer 94 is a metal member having excellent rigidity.

In FIG. 8, reference numerals 951 and 952 are pads which are pressed against the disk rotor. And FIG.
In the so-called floating caliper in which only the pad 951 (inner pad) on one side is pressed by the piston 92 as shown in FIG. 5, the caliper 90 is held in a semi-fixed state on the mounting bracket via a sliding pin (not shown).

That is, as shown in FIG.
The sliding pin 97 fixed to the pin arm 912 of the
It is fitted in the pin hole 961 of 60 and slides in the direction of the arrow. The sliding pin 97 and the pin sleeve 960, which are the fitting body,
A boot 98 is installed between and.

That is, one end 981 of the boot 98 is
The other end 982 is fixed to the outer circumference of the sliding pin 97, and the other end 982 is fitted into an annular groove 962 provided at the opening end of the pin hole 961. Then, as shown in FIG. 11, the other end 982 is firmly fixed to the annular groove 96 by a metal retainer 940.
Held within 2.

The retainers 94 and 940 mounted in the annular grooves 911 and 962 are boots 93 and 9 respectively.
8 is fixed with an adhesive. That is, the retainer 94,
An adhesive is applied to the surface of 940, the other ends 932, 982 of the boots 93, 98 and the retainers 94, 940 are aligned and press-fitted into the annular grooves 911, 962.

[0008]

However, the above fitting body with boots used for the disc brake has the following problems. It is the retainer 94, 940, the boot 93,
An adhesive is required to fix the other end portion 932, 982 of 98, and the number of steps for applying the adhesive, the material cost of the adhesive, and the cost increase. In view of such conventional problems, the present invention is to provide a fitting body with a boot that is easy to assemble and inexpensive.

[0009]

According to the present invention, there is provided a first member having a columnar protrusion, a fitting hole into which the columnar protrusion is slidably fitted, and an annular groove surrounding an opening edge portion of the fitting hole. And a ring-shaped boot provided between the annular groove and the outer peripheral portion of the columnar protrusion, the boot including the columnar protrusion. It has a first end fixed to the outer periphery, a second end fitted into the annular groove, and an expandable bellows connecting the first and second ends. The second end portion is composed of a retainer having high rigidity and a meat portion of a highly elastic body. The retainer is provided with a plurality of through holes. The fitting body with boots is characterized in that an annular coupling portion for coupling is formed.

What is most noticeable in the present invention is that the second end of the boot fitted in the annular groove comprises a retainer and a meat portion, and the retainer is provided with a plurality of through holes, and the meat portion has a through hole. That is, an annular connecting portion that penetrates the through hole and is reconnected is formed. As a result, the retainer and the meat portion at the second end are integrally connected by the annular connecting portion penetrating the through hole of the retainer.

The annular connecting portion can be easily formed by insert-molding a retainer having a through hole in the meat portion. For example, when a flesh part made of a highly elastic material such as rubber is fluidized together with the bellows part and the first end and press-fitted into the mold, the retainer is inserted into the position where the flesh part is formed and molded. The molding material of the meat part flows into the through hole, and the annular connecting part is easily formed. Then, the retainer and the meat portion are integrated.

The fitting body with boots is, for example, a fitting body of a piston and a cylinder in a disc brake caliper. Further, as another example of the fitting body with boots, there is a fitting body composed of a sliding pin provided on a floating caliper or a mounting bracket of a disc brake and a pin sleeve of the mounting bracket or the floating caliper.

[0013]

In the boot of the fitting body with boots according to the present invention, the retainer and the meat portion are integrally connected by the annular connecting portion penetrating the through hole of the retainer. Therefore, the work of adhering the retainer to the meat portion and the adhesive are unnecessary, so that the number of assembling steps is reduced and the cost is reduced.

The retainer can be extremely easily formed by insert molding as described above. Therefore, the number of manufacturing steps of the fitting body with boots of the present invention is significantly reduced as compared with the conventional one, and as a result, the cost can be reduced. As described above, according to the present invention, it is possible to provide a bootable fitting body that is easy to assemble and inexpensive.

[0015]

【Example】

Example 1 FIG. 1 is a perspective view of a fitting body with a boot according to an example of the present invention.
This will be described with reference to FIG. This example is a fitting body with boots that consists of a sliding pin and a pin sleeve of a caliper floating disc brake. That is, as shown in FIG.
Pin 11 as a first member having a columnar protrusion 1
A pin sleeve 13 as a second member having a pin hole 14 as a fitting hole into which the pin 2 is slidably fitted and an annular groove 15 (FIG. 2) that goes around the opening edge of the pin hole 14; The boot-fitted body 10 includes a ring-shaped boot 16 that is provided between the groove 15 and the outer peripheral portion of the columnar protrusion 12.

The boot 16 has a first end portion 17 fixed to the outer peripheral portion of the columnar projection 12, a second end portion 18 fitted in the annular groove 15, and an expansion / contraction portion for connecting between the both end portions 17, 18. It has a flexible bellows portion 19. As shown in FIG. 2, the second end portion 18 is composed of a high-rigidity retainer 181 embedded in the annular groove 15 and a meat portion 185 of a highly elastic body. The retainer 181 has a second end 18 as shown in FIG. A plurality of through holes 182 are formed.

Further, as shown in FIG. 2, the flesh portion 185 has an annular connecting portion 18 which penetrates the through hole 182 and is rejoined.
6 is formed. The annular connecting portion 186 has a meat portion 185.
The retainer 181 is formed by insert molding.

A supplementary explanation will be given below for each of them. As shown in FIG. 4, the disc brake 1 includes pads 421 and 422 that are pressed by the disc rotor and a pad 42.
And a caliper 41 that drives 1, 422. The caliper 41 has a piston (not shown) that presses the inner pad 421, and a cylinder 411 that is connected to the outer pad 422.

The caliper 41 has a sliding pin 11
It is mounted so as to be floatable on the mounting bracket 43 via (FIG. 1). That is, as shown in FIG. 1, the sliding pin 11 is fixed to the pin arm 412 of the cylinder 411 via the fixing bolt 111.
Reference numeral 1 has a columnar projection 12 that slides in a pin hole 14 of a pin sleeve 13 provided on the mounting bracket 43.

Between the annular pin 15 provided at the opening end of the pin hole 14 and the sliding pin 11, the boot 1 which can be expanded and contracted.
6 is erected. As shown in FIG. 2, the boot 16 includes a first end portion 17 that tightens the outer peripheral portion of the columnar protrusion 12,
It comprises a second end portion 18 fitted in the annular groove 15 and a bellows portion 19 which is expandable and contractible.

The second end portion 18 has a retainer 181 insert-molded in the meat portion 185. Retainer 181
Is a ring-shaped member having an L-shaped cross-section, and its side plate 183 abuts the small-diameter outer wall inside the annular groove 15,
Through holes 182 are formed in the upper plate portion 184 as shown in FIG.

The through holes 182 are symmetrically arranged at four places on the upper plate portion 184. In the present embodiment, the material forming the first end portion 17, the bellows portion 19 and the meat portion 185 is ethylene-propylene rubber, and the retainer 18 made of stainless steel is used.
1 is inserted and molded integrally. Positioning of the retainer 181 at the time of insert molding is performed by pouring ethylene-propylene rubber, which is a material, while supporting some places of the retainer 181.

Next, the function and effect of the fitting body with boot 10 of this embodiment will be described. In the boot 16 of this example, the retainer 181 is integrally formed with the meat portion 185 by insert molding, and is connected to the meat portion 185 via the annular connecting portion 186. Therefore, the work of adhering the retainer 181 to the meat portion 185 as in the case of the conventional fitting body with boots and the adhesive are not required, the number of assembling steps is reduced, and the manufacturing cost can be reduced. Therefore, according to this example, it is possible to provide the boot-fitted body 10 that is easy to assemble and inexpensive.

Embodiment 2 In this embodiment, as shown in FIG. 5, the retainer 180 is completely embedded in the meat portion 185 and the side plate 187 of the retainer 180 is also provided with a through hole 188 in Embodiment 1. This is one example. That is, the retainer 180 has the meat portion 1
It is embedded in 85 and has through holes 182, 18
8 and annular connecting portions 186 and 189 are formed respectively. Therefore, the integrity of the retainer 180 and the meat portion 185 is stronger. Others are the same as in the first embodiment.

Example 3 In this example, as shown in FIG. 6, a piston 415 as a first member, a cylinder 411 as a second member, and both 4
The boot-fitted body 20 is composed of a boot 21 installed between 11, 415. In this example, as shown in FIG.
The boot-fitted body 20 is formed on the caliper 41 of the disc brake, and the boot 21 is provided between the piston 415 and the cylinder 411.

The first end 22 of the boot 21 is connected to the piston 4
It is fixed to the ring groove 417 provided on the outer circumference 416 of 15,
The second end 23 is fitted and fixed in an annular groove 412 formed in the inner wall of the cylinder 411 in which the piston 415 is slidably fitted. As shown in FIG. 7, the second end portion 23 includes a meat portion 235 and a ring-shaped retainer 231 embedded in the meat portion 235 and having an L-shaped cross section.

The retainer 231 has through holes 232, 23.
3 are provided, and the through holes 232 and 233 are provided at four locations along the annular groove 412 of the cylinder 411, respectively. Then, annular connecting portions 236 and 237 are formed in the meat portion 235 so as to penetrate the through holes 232 and 233.

Since the retainer 231 is integrated with the wall portion 235 by insert molding, the number of assembling steps is greatly reduced as compared with the conventional product as in the first embodiment. Figure 7
In the above, reference numeral 24 is a bellows portion that connects the first end portion 22 and the second end portion 23. Others are the same as those in the first embodiment.

[Brief description of drawings]

FIG. 1 is a sectional view of a fitting body with boots according to a first embodiment.

FIG. 2 is a partially enlarged cross-sectional view of the boot of the fitting body with boots according to the first embodiment.

FIG. 3 is a plan view of the retainer according to the first embodiment.

FIG. 4 is a plan view of a disc brake in which the boot-fitted body of the first embodiment is used.

FIG. 5 is a partially enlarged cross-sectional view of the boot of the fitting body with boots according to the second embodiment.

FIG. 6 is a sectional view of a fitting body with boot according to a third embodiment.

FIG. 7 is a partially enlarged cross-sectional view of a boot of a fitting body with boots according to a third embodiment.

FIG. 8 is a sectional view of a conventional disc brake caliper.

9 is a partially enlarged sectional view of the boot shown in FIG.

FIG. 10 is a cross-sectional view near a sliding pin of a conventional disc brake.

11 is a partially enlarged cross-sectional view of the boot shown in FIG.

[Explanation of symbols]

 10. . . Fitting with boots, 12. . . Columnar protrusions, 14. . . Pin hole (fitting hole), 15. . . Annular groove, 16. . . Boots, 18. . . Second end, 181. . . Retainer, 185. . . Meat part,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuyuki Hanai 2-1-1 Asahi-cho, Kariya city, Aichi Prefecture Aisin Seiki Co., Ltd.

Claims (4)

[Claims] 1. A second member having a first member having a columnar protrusion, a fitting hole into which the columnar protrusion is slidably fitted, and an annular groove which goes around an opening edge of the fitting hole. A boot-fitting body having a member and a ring-shaped boot provided between the annular groove and the outer peripheral portion of the columnar protrusion, the boot comprising:
A first end fixed to the outer periphery of the columnar protrusion, a second end fitted into the annular groove, and an expandable bellows connecting the first and second ends. The second end portion is composed of a highly rigid retainer and a meat portion of a highly elastic body, and the retainer is provided with a plurality of through holes.
A fitting body with boots, wherein an annular connecting portion is formed in the meat portion so as to re-connect through the through hole. 2. The fitting body with boots according to claim 1, wherein the annular connecting portion of the second end portion is formed by insert-molding the retainer on the meat portion. 3. The fitting body with boots according to claim 1 or 2, wherein the first member is a piston of a disc brake caliper, and the second member is a cylinder of the caliper. 4. The first member according to claim 1 or 2, wherein the first member is a sliding pin provided on a mounting bracket or a floating caliper of a disc brake, and the second member is fitted with the sliding pin. A fitting body with a boot, which is a pin sleeve provided on the caliper or the mounting bracket to be worn.