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US 7,582,020 B2Granted
Boot for universal joint
AssigneeNok Corporation
InventorsShigeyuki Ono, Takashi Shimazu, Yoshiaki Sugiura
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AssigneeNok Corporation
InventorsShigeyuki Ono, Takashi Shimazu, Yoshiaki Sugiura
Estimating the term…
In a universal joint boot including a bellows part, a ring-shaped mounting part that is formed at one end of the bellows part and into which a cup for receiving one member of two members moving relatively to each other is inserted; and a seal that is formed toward the peripheral direction of the inner peripheral surface of the mounting part to which the cup is mounted, the inner peripheral surface has protrusions protruding toward the axial center of the ring-shaped mounting part and the height of the seal lip becomes lower from the bottom of the protrusion to a peak and width of the seal lip becomes wider from the bottom of the protrusion to the peak, whereby sealing performance can be improved.
A universal joint boot comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Non-metallic bellows: fastening details
Enclosed covers: allowing relative movement of joint parts due to the flexing of the cover
The pins extending radially outwardly from the coupling part: having three pins, i.e. true tripod joints
Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts: homokinetic coupling
Term ended 13 Mar 2025 (estimated)
This is a nationalization of PCT/JP2004/013518 filed 16 Sep. 2004 and published in Japanese.
The present invention relates to a boot for protecting a movable mechanism part and, in particular, to a universal joint boot for protecting the movable mechanism part of a universal joint in automobiles and industrial machines.
Among conventional boots of this kind is a boot that includes a freely extendable and contractible bellows part, a large-diameter ring-shaped mounting part formed at one end in the axial direction of this bellows part, and a small-diameter ring-shaped mounting part formed at the other end in the axial direction, and is molded by blowing a material such as thermoplastic elastomer.
FIG. 1 is a schematic perspective view of a universal joint boot in accordance with embodiment 1 when viewed from its large-diameter mounting part side.
FIG. 2 is an external perspective view showing a state where the boot in accordance with this embodiment is mounted on a case.
FIG. 3 shows a sectional view along a line A-A, a sectional view along a line B-B, and a sectional view along a line C-C in FIG. 1 of the universal joint boot in accordance with embodiment 1.
Hereafter, the best mode for carrying out this invention will be described in detail by way of example with reference to the drawings and embodiments. However, as for the size, material, shape, and relative arrangement of constituent parts described in these embodiments, it is not intended to limit the scope of this invention only to these unless otherwise specified. Further, the materials and shapes of parts once described in the following description are the same as those described in the beginning unless otherwise specified.
First, a universal joint boot in accordance with this embodiment will be described with reference to FIG. 2. FIG. 2 is an external perspective view showing a state where a boot in accordance with this embodiment is mounted on a case.
A universal joint boot 1 used for a constant-velocity joint in accordance with this embodiment has a cylindrical bellows part 10 that has peaks and valleys formed continuously in a repetitive manner and can extend and contract and a large-diameter mounting part 20 that is provided at one end of the bellows part 10 and into which a case for receiving one member of two members moving relatively to each other is inserted. In the universal joint boot 1, the large-diameter mounting part 20 is fitted on the outer periphery of the opening of a joint cup (case) 40 for receiving the shaft of one member of the two members moving relatively to each other and is fixed to the cup 40 by a band 30.