Cap fitting structure for shaft member

• US 4,834,573 A
• Filed: 06/15/1988
• Issued: 05/30/1989
• Est. Priority Date: 06/16/1987
• Status: Expired due to Fees

• Current Assignee: KATO Hatsujo Kaisha Limited, Ohi Seisakusho Co., Ltd. (Mitsui Mining and Smelting Company Limited)
• Original Assignee: KATO Hatsujo Kaisha Limited, Ohi Seisakusho Co., Ltd. (Mitsui Mining and Smelting Company Limited)
• Inventors: Aoki, Toshihiko, Asano, Kazunori
• Primary Examiner(s): KUNDRAT, ANDREW
• Application Number:
  US07/206,736
• Time in Patent Office: 349 Days
• Field of Search: 403/344, 403/383, 403/361
• US Class Current: 403/344
• CPC Class Codes: F16D 1/0864 due to tangential loading of the hub, e.g. a split hub
• CPC Class Codes: Y10T 403/7098 Non-circular rod section is joint component

Abstract

A fitting structure includes a shaft member of metal provided at the leading end part thereof with check projections formed integrally thereon, and a cap of synthetic resin formed of a main body and a lid member. The main body is provided therein with an insertion groove permitting insertion therein of the leading end part of the shaft member provided with the check porjections. The insertion groove is adapted to be closed by the lid member of the cap. Owing to this structure, the cap can be fitted to the leading end of the shaft member by a single operation of closing the insertion groove with the lid member. The fitting work involved in the structure of this invention, therefore, is extremely simple. While the cap is formed of the two component parts, i.e. the main body and the lid member, neither the main body nor the lid member is required to have any screw thread therein. Thus, the metal mold to be used for the formation of the cap is inexpensive and the cap itself can be produced inexpensively.

Claims

1. A fitting structure comprising:

a shaft member made of metal and having check projections at the leading end thereof projecting laterally from the opposite sides thereof;

a cap made of synthetic resin and having a main body and a lid member, said main body having a stepped part for receiving said lid member thereover, said stepped part having a longitudinally extending insertion groove therein having a transversely extending roughly cruciform shape portion for accomodating therein said check projections and the leading end of said shaft member, said stepped part having engaging claws on the opposite lateral walls thereof, and said lid member having fixing holes in the opposite lateral walls thereof for engaging said engaging claws for holding said lid on said main body, and said lid member further having a retaining part having a shape roughly similar to the shape of said cruciform portion of said insertion groove and extending into said insertion groove to engage the leading end of said shaft therein when said lid is in position on said main body.

2. A fitting structure as claimed in claim 1 further comprising a coil spring tightly wound around the outer periphery of said main body and said lid member.