JPH0653838U - Dust cover boots for shock absorbers - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a dust cover boot of a shock absorber having a good sealing property and a good workability of fixing. [Structure] Stretchably formed, one end of which is attached to the piston rod side of a shock absorber having a piston rod and a cylinder, covers the end of the piston rod and the cylinder, and the other end of which is on the cylinder side. In the dust cover boot for the shock absorber that is attached and arranged in the coil spring, the engaging portion of the tightening band is provided at the other end, and the tightening band is temporarily fixed to this engaging portion. After assembling the shock absorber, the tightening band is fixed to the shock absorber.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dust cover boot for a shock absorber of a vehicle suspension system such as an automobile, and particularly, it is arranged in a coil spring of a suspension system and is attached to a cylinder of a shock absorber by fastening an end portion with a band. Dust cover boots.

[0002]

[Prior art]

 Dust cover boots for shock absorbers for automobile suspension systems cover the ends of the piston rod and cylinder to prevent dust and water droplets from attaching to sliding parts. As this type of dust cover boot, one shown in FIG. 5 is known. In FIG. 5, 1 is a shock absorber and 2 is a dust cover boot. The shock absorber 1 has a piston rod 3 and a cylinder 4, and the piston rod 3 is slidably extended from the cylinder 4. The dust cover boot 2 has a hollow bellows-shaped central portion, has an opening through which the upper portion of the piston rod 3 is inserted, and has a thin lower portion so as to come into close contact with the cylinder 4. It covers the edges. The shock absorber 1 of the vehicle suspension system is attached to the metal fitting 5 on the vehicle body side at one end of the piston rod 3 via the mount member 6, and is attached to the vehicle wheel side at the other end of the cylinder 4 not shown. A coil spring 7 is supported by an upper tray 8 provided above the piston rod 3 and a lower tray 9 provided above the cylinder 4, and is installed between the piston rod 3 and the cylinder 4. A bound bumper 10 is provided below the upper tray 8 above the piston rod 3. To mount the shock absorber 1 configured as described above on a vehicle, first, the bound bumper 10 is attached to the piston rod 3 of the shock absorber 1, and the dust cover boot 2 is attached from the upper portion of the piston rod 3 to the end portion of the cylinder 4. Can be installed by covering. Next, the coil spring 7 is supported by the lower pan 9 and the upper pan 8 is fixed to the piston rod 3. Here, the lower part of the dust cover boot 2 is fastened with the band 11.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional dust cover boot having a thin lower part, the sealing is insufficient, and it has been impossible to prevent the infiltration of dust. The dust cover boot, in which the lower part is fixed by a separate band to solve this drawback, has a problem that the positioning of the band is troublesome and the workability is poor.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a dust cover boot of a shock absorber having good sealing performance and good fixing workability. To aim.

[0005]

[Means for Solving the Problems]

 The dust cover boot according to the present invention is formed to be expandable and contractible, and one end of the dust cover boot is attached to the piston rod side of a shock absorber having a piston rod and a cylinder to cover the end of the piston rod and the cylinder. Of the dust cover boot for shock absorbers, which is mounted on the cylinder side and is attached to the cylinder side, is provided with an engaging part of a tightening band at the other end and tightens to this engaging part. The fastening band is temporarily fixed, the shock absorber is assembled, and then the tightening band is fixed to the shock absorber.

[0006]

[Action]

 As described above, the dust cover boot according to the present invention is provided with the engaging portion of the tightening band at the lower end thereof, and the band for fastening the dust cover boot to the cylinder is temporarily fixed to this engaging portion. The upper part of the dust cover boot is attached to the body side of the piston rod of the shock absorber, the lower part is fitted to the upper part of the cylinder on the wheel side, and this shock absorber is installed in the coil spring for assembly. After that, tighten the tightening band that is temporarily fixed to the engaging part of the dust cover boot to fix the lower part to the wheel side. In this way, the dust cover boot is provided with the band engaging portion, and the band is temporarily fixed to this engaging portion, so that the band does not move out of position and the band does not have to be positioned, so that workability is improved. Can be improved and productivity can be improved. Also, if the band can be fixed by a one-touch method, the band can be fixed quickly, workability is improved, and assembly productivity is further improved.

[0007]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings, taking a bellows-shaped dust cover boot as an example. 1 to 3 are explanatory views showing a dust cover boot according to a first embodiment of the present invention. The dust cover boot 12 of the present embodiment has a hollow bellows-like portion and is formed in a stretchable manner. One end of the dust cover boot 12 is attached to the piston rod 3 attached to the vehicle body side of the shock absorber 1, and the other end is attached to the vehicle wheel side at the cylinder 4 portion. An opening is provided so that one end of the dust cover boot 12 can be attached to the piston rod 3, a hollow bellows-like portion is formed, and extends to the cylindrical portion 15 at the other end in the axial direction. An engaging portion 16 of a tightening band 18 is provided on the cylindrical portion 15, and the tightening band 18 is temporarily fixed to the engaging portion 16. Reference numeral 5 is a metal fitting on the vehicle body side, 6 is a mount member, 7 is a coil spring, 8 is an upper tray, 9 is a lower tray, and 10 is a bound bumper, which are similar to the above-mentioned conventional example.

As shown in FIGS. 2 and 3, the engaging portions 16 are provided at a plurality of positions on the circumferential line of the dust cover boot 12. The engaging portion 16 of the present embodiment is provided with a spherical portion 17 having a diameter larger than that of the root at the tip portion thereof and is formed integrally with the dust cover boot 12. The band 18 is of a one-touch type that can be fastened by pulling and releasing force, such as an insulin lock or ratchet type. A long hole 19 is provided at a position corresponding to the engaging portion 16 in the middle of the band 18. When the band 18 is wound around the dust cover boot 12, the engaging portion 16 fits into the elongated hole 19, and the band 18 is positioned at the lower end portion of the dust cover boot 12 so as not to come off. It is preferable that the band 18 be of a type that can be fastened with a single touch such as a normal insulock, from the viewpoint of workability of fixing work.

The dust cover boot 12 of the present embodiment configured as described above is attached to the shock absorber 1 with the band 18 fitted to the engaging portion 16 being loosened, and the shock absorber 1 is attached to the vehicle. Then, the end portion 20 of the band 18 is pulled and tightened, and the band portion 18 is locked by being engaged with the locking portion 21. At this time, the band 18 is locked at the predetermined position by being engaged with the engaging portion 16 of the dust cover boot 12, and it suffices to pull the end of the band 18 as it is inside the coil spring 7, and it is not necessary to align the position. Therefore, the workability of assembly can be significantly improved.

FIG. 4 is an explanatory view showing a dust cover boot according to another embodiment of the present invention. The dust cover boot 22 of the present embodiment has a hollow bellows-like portion, is formed to be expandable and contractable, and is attached to a vehicle, similarly to the dust cover boot of the above embodiments. An engaging portion 24 of a tightening band 25 is provided on the cylindrical portion 23 of the dust cover boot 22, and the tightening band 25 is temporarily fixed to the engaging portion 24. The engaging portion 24 is formed by providing a pair of hook-shaped locking pieces 24a, 24a at a plurality of positions on the circumference of the cylindrical portion 23 at intervals. The band 25 is inserted between the locking pieces 24a, 24a and wound around the outer periphery of the cylindrical portion 23 so that the band 25 is temporarily fixed. This band 25 is also preferably of a type that can be fastened with one touch. The locking pieces 24a, 24a of this embodiment are formed integrally with the dust cover boot 22.

The dust cover boot 22 of this embodiment can be mounted on the vehicle by mounting the dust cover boot 22 on the shock absorber 1 with the band 25 inserted into the engaging portion 24 being loosened, as in the first embodiment. After that, the end portion 26 of the band 25 is pulled and tightened to be engaged with the engaging portion 27 so as to be engaged. At this time, the band 25 is locked at the engaging portion 24 of the dust cover boot 22 and is in a predetermined position, and the end of the band 25 may be simply pulled inside the coil spring 7 without the need to adjust the position. Because it is good, the workability of assembly can be greatly improved.

The present invention is not limited to the above embodiment, and may be a band engaging portion of another type, a tightening band, or the like. The point is that the band that tightens the lower part of the dust cover boot can be temporarily stopped and positioned.

[0013]

[Effect of device]

 As described above, according to the dust cover boot of the present invention, the band for tightening the lower portion of the dust cover boot is temporarily fixed at a predetermined position by being engaged with the engaging portion of the dust cover boot, and is secured inside the coil spring. Since it is possible to tighten the band as it is, it is not necessary to align the positions, which improves workability and further improves productivity. The lower part of the dust cover boot is tightened with a band, which provides good sealing performance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a mounted state of a dust cover boot according to the present invention.

FIG. 2 is an explanatory view showing a state in which the band is temporarily fixed to the engaging portion of the first embodiment of the present invention.

FIG. 3 is an enlarged explanatory view showing an engaging portion of the embodiment of FIG.

FIG. 4 is an explanatory view showing another embodiment of the dust cover boot.

FIG. 5 is a cross-sectional view illustrating a mounted state of a conventional dust cover boot.

[Explanation of symbols]

1 Shock absorber 2,12,22 Dust cover boot 3 Piston rod 4 Cylinder 5 Metal fitting 6 Mounting member 7 Coil spring 16,24 Engagement part 18,25 Band

Claims (1)

[Scope of utility model registration request] 1. A telescopically formed shock absorber having a piston rod and a cylinder, one end of which is attached to the piston rod side, covers the end of the piston rod and the cylinder, and has the other end of the cylinder. Side of the dust cover boot for shock absorber, which is installed in the coil spring, is provided with an engaging portion of a tightening band at the other end, and the tightening band is temporarily fixed to this engaging portion. The dust cover boot for a shock absorber, characterized in that the tightening band is fixed to the shock absorber after the shock absorber is assembled.