JPH0673535U - boots - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the workability of assembling a fixture such as a band to the mounting part, and at the same time, to make the stopper retainer retaining performance sufficient. [Structure] When the mounting portion 2 is fixed to a mating component by a fixing member 7 such as a band on the inner peripheral surface 4 of the free end portion 3 of the mounting portion 2, the free end 3 of the mounting portion 2 expands outward. The convex portion 5 that is extended to form a stopper for preventing the fixture from coming off is provided continuously or intermittently in the circumferential direction. When the fixing member 7 such as a band is loaded into the boot mounting portion 2, there is no stopper for preventing the fixing device from slipping off at the end portion of the mounting portion 2, or it is a low stopper that does not sufficiently function as a stopper. Although the fitting part 2 can be easily fitted, when the mounting part 2 is fixed to the mating part by the fixture 7, the convex part 5 of the inner peripheral surface 4 of the mounting part 2 is relatively pressed by the mating part. The free end 3 of the mounting portion 2 and its vicinity bulge outward by the amount of deformation, forming a sufficient stopper stopper stopper to prevent the fastener from falling off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is fixed to a mating component at both ends of a bellows part, such as a steering boot, a cylinder boot, a boot for an absorber, etc., which is mainly linearly deformed, and a CVJ boot, which is repeatedly bent and deformed. The present invention relates to a rubber or resin boot having a mounting portion for wearing the boot. More specifically, the present invention relates to an improvement of a stopper for stoppers such as a fixing band fitted to a mounting portion for fixing a boot to a counterpart component.

[0002]

[Prior art]

 As shown in FIG. 7, a general CVJ boot 41 is composed of a bellows portion 42 and substantially cylindrical mounting portions 43 and 44 at both ends thereof, and is provided with a counterpart component (in FIG. 7, a constant velocity joint 45 of the constant velocity joint 45). The mounting portions 43 and 44 are fitted to the outer ring portion 46 and the rotating shaft portion 47) and fixed by fastening with a fixing member 48 such as a band or a ring.

Here, since the bellows portion 42 of the boot 41 repeats bending after following the displacement of the counterpart parts 46 and 47, a force acts on the mounting portions 43 and 44 in the boot falling direction. Therefore, the mounting portions 43 and 44 need to be strongly fixed to the mating parts 46 and 47 by the fixture 48.

Therefore, conventionally, a sufficient tightening force is applied to the mounting portions 43 and 44, so that the mounting portions 43 and 44 have a size that is not so large, that is, slightly larger than the outer diameter of the mounting portions 43 and 44. A degree of annular fixture is used. In order to prevent the fixture 48 from slipping off from the mounting portions 43 and 44 during use, a flange-shaped slip-out is formed on the outer peripheral surface of the free end of the mounting portion 43, for example, as shown in an enlarged view in FIG. A stopper 49 for stopping is provided.

[0005]

However, when the flange-shaped stopper 49 protruding outward is provided at the boot end, there are the following problems. If the height of the stopper 49 is high, the stopper 49 must be overcome when the fixture 48 is incorporated into the mounting portion 43 (44) (see the phantom line in FIG. 8), which requires a large force. However, there is a problem that workability is poor. On the other hand, if the height of the stopper 49 is reduced, there is a problem that the stopper 48 does not sufficiently function as a stopper for retaining and the fixture 48 easily comes off the mounting portion 43 (44).

[0006] That is, in the conventional boot structure, there is a risk that the fixing device may fall off during use if it is attempted to improve the assembling property of the fixing device. There is a trade-off between the fixability of the fixture and the risk of falling out, which results in poor performance.

An object of the present invention is to provide a boot having a fixing tool stopper which has a good workability of assembling a fixing tool such as a band with respect to a mounting portion and which has excellent retaining performance.

[0008]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a boot having a bellows portion and a mounting portion for fixing both ends thereof to a counterpart component, by providing the mounting portion on the inner peripheral surface of the free end portion of the mounting portion. When it is fixed to the mating part with a fixing tool such as a band, it is pressed against the mating part and bulges the free end of the mounting part to the outer diameter side to form a stopper stopper. The convex portion is provided continuously or intermittently in the circumferential direction. Here, the stopper for retaining the fixture is not formed at all on the outer peripheral surface of the free end of the mounting part, or even if it is formed, it has a height or shape that does not sufficiently function as a stopper. is there.

[0009]

[Action]

 Therefore, when a fastener such as a band is loaded on the boot mounting portion, there is no stopper for preventing the fastener from slipping off at the inlet side end of the mounting portion or a lower stopper that does not function sufficiently as a band stopper. Since it is a thing, it is easily fitted.

Then, when the fixing tool is tightened in a state where the mounting portion is fitted in the counterpart component, the vicinity of the convex portion of the inner peripheral surface of the free end is the counterpart side until the inner peripheral surface of the mounting portion comes into close contact with the counterpart component. The part is relatively pressed and deformed, and the free end of the mounting part and its vicinity are bulged outward by the amount of the convex part. At this time, since the mounting part except the free end and its vicinity is brought into close contact with the mating component by the fixture, only the vicinity of the free end bulges outward so that it is rolled toward the fixture. . Therefore, a stopper is formed on the outer peripheral surface of the mounting portion due to the bulging free end portion, or a stopper that is pre-tilted is erected, or a stopper that is erected beforehand is attached to the fixture side. It will fall over and serve as a stopper.

[0011]

【Example】

 Hereinafter, the configuration of the present invention will be described in detail based on the embodiments shown in the drawings.

1 and 2 show an embodiment of the boot of the present invention. The mounting portion 2 of the boot 1 is formed in a cylindrical shape having a flat outer peripheral surface 6 and has no protruding portion functioning as a stopper for preventing the fixture 7 from coming off on the outer surface thereof. On the other hand, on the free end 3 side of the inner peripheral surface 4 of the mounting portion 2, a convex portion 5 is integrally formed continuously in the circumferential direction. The boot 1 is generally made of rubber or resin.

As shown in FIGS. 1 and 2, the convex portion 5 provided on the inner peripheral surface 4 of the free end 3 of the mounting portion 2 has a shape such as a band when the mounting portion 2 is mounted on the counterpart component 9. When the fixing member 7 is tightened and fixed, the free end 3 side of the mounting portion 2 is projected outward by the amount of being pressed by the mating member 9 and retracting, and the stopper 8 for preventing the fixing member 7 from coming off. And The protrusions 5 may be formed intermittently in the circumferential direction.

According to the boot 1 configured as described above, it is mounted on the counterpart component as follows.

When the boot 1 is mounted, it is preferable to first fit a fixing member 7 such as a band into the mounting portion 2. At this time, since the free end 3 of the mounting portion 2 does not have a protruding portion toward the outer diameter side, the fixture 7 can be easily inserted. Next, the mounting portion 2 of the boot 1 is fitted into the counterpart component 9. At this time, the convex portion 5 of the inner peripheral surface 4 of the mounting portion 2 is compressed and deformed to some extent due to the tightening margin of the mounting portion 2 with respect to the counterpart component 9, but the free end 3 of the mounting portion 2 serves as a stopper for retaining. Do not swell until it works.

Next, when the fixing member 7 is tightened, the mounting portion 2 is tightened on the mating component 9 without a gap, so that the free end 3 and the outer peripheral surface 6 side of the mounting portion 2 are swollen so as to be rolled toward the fixing member 7. A stopper 8 for forming (warping) and preventing the fixture 7 from coming off is formed (see FIG. 2).

Another embodiment is shown in FIGS. 3 and 4. In this embodiment, an inclined stopper 22 is provided in advance on the free end 21 of the mounting portion 24, and a convex portion 26 is provided on the inner peripheral surface 25 on the free end 21 side. The stopper 22 is formed with a flange having such a height that it does not greatly obstruct the passage of the fixture 23 in the inclined state, but has a length sufficient to function as a stopper for preventing the stopper 22 from standing upright. Therefore, when the fixing tool 23 is loaded, the stopper 22 has a slanted height that is low enough to allow the fixing tool 23 to easily pass therethrough. Further, when the stopper 22 is formed so as to be inclined, it can be easily bent in the diameter reducing direction, so that it does not particularly hinder the insertion of the fixing tool 23 even if it has a certain height. Then, when the mounting portion 24 is fitted into the mating component 27 and then the fixing tool 23 is tightened, the convex portion 26 of the inner peripheral surface 25 of the mounting portion 24 is pressed by the mating member 27, and the free end of the mounting portion 24. 21 side is bulged. At this time, since the free end 21 swells so as to be rolled toward the fixture 23, the slanted stopper 22 stands upright. Then, the fixing tool 23 is prevented from falling off during use.

Further, FIG. 5 and FIG. 6 show another embodiment. In this embodiment, an upright stopper 31 is previously formed on the free end 36 of the mounting portion 33, and a convex portion 35 is provided on the inner peripheral surface 34 side. The height of the stopper 31 is short enough to function as a stopper for preventing the fixing tool 32 from coming off, and the fixing tool 32 can be fitted easily. A convex portion 35 is provided on the inner peripheral surface 34 of the mounting portion 33 on the free end 36 side. Therefore, when the mounting portion 33 is fitted into the mating component 38 and then the fixing tool 32 is tightened, the convex portion 35 of the inner peripheral surface 34 of the mounting portion 33 is pressed by the mating component 38 and the mounting portion 33 is correspondingly pressed. The free end 36 and the outer peripheral surface 37 of the are bulged so that they can be rolled outward. Therefore, the length of the stopper 31 is further lengthened, and the stopper 31 is tilted toward the fixture 32 to improve the retaining performance.

[0019]

[Effect of device]

 As will be apparent from the above description, the present invention is designed such that the free end of the mounting part is attached to the inner peripheral surface of the free end part of the mounting part when the mounting part is fixed to the counterpart component by a fixing tool such as a band. Since the projections that bulge radially and form the stoppers for retaining the fasteners are provided in the circumferential direction continuously or intermittently, when mounting the fasteners such as bands on the boot mounting portion, There is no stopper to prevent the fixture from slipping off at the end of the mounting part, or it is a low stopper that does not function well as a stopper, so it can be easily fitted, but When the mounting part is fixed to the mating part by the, the free end of the mounting part and its vicinity bulge outward as much as the convex part of the inner peripheral surface of the mounting part is relatively pressed and deformed by the mating part. Make sure that a sufficient stopper is formed to prevent the fixture from coming off. There is no danger of falling out of the fixture.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a mounting portion of a boot according to the present invention.

FIG. 2 is a vertical sectional view showing a mounted state of the embodiment of FIG.

FIG. 3 is a vertical cross-sectional view showing another embodiment of the mounting portion.

FIG. 4 is a vertical sectional view showing a mounted state of the embodiment of FIG.

FIG. 5 is a vertical cross-sectional view showing another embodiment of the mounting portion.

FIG. 6 is a vertical cross-sectional view showing a mounted state of the embodiment of FIG.

FIG. 7 is a vertical sectional view showing a general wearing state of boots.

FIG. 8 is a vertical cross-sectional view of a mounting portion of a conventional boot.

[Explanation of symbols]

 1 Boots 2,24,33 Mounting part 3,21,36 Free end 4,25,34 Inner peripheral surface 5,26,35 Convex part 6,37 Outer peripheral surface 7,23,32 Fixing tool 8,22,31 Stopper 9 , 25, 38 Mating parts

Claims (1)

[Scope of utility model registration request] 1. A boot having a bellows portion and a mounting portion for fixing both ends thereof to a counterpart component, wherein the mounting portion is fixed to an inner peripheral surface of a free end portion of the mounting portion by a fastener such as a band. When fixed to the mating part, the convex part that is pressed relatively by the mating part and bulges the free end of the mounting part to the outer diameter side to form a stopper for retaining the fixing part is continuous. Boots characterized by being provided in the circumferential direction intermittently or intermittently.