发明授权
- 专利标题: Track pin with vented rubber plug
- 专利标题(中): 带导轨橡胶插头的跟踪针
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申请号: US3762778D申请日: 1971-04-02
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公开(公告)号: US3762778A公开(公告)日: 1973-10-02
- 发明人: BOGGS R , BALZER D , HASLETT G
- 申请人: CATERPILLAR TRACTOR CO
- 专利权人: Caterpillar Inc
- 当前专利权人: Caterpillar Inc
- 优先权: US13066471 1971-04-02
- 主分类号: B62D55/088
- IPC分类号: B62D55/088 ; B62D55/092 ; F16N21/06 ; B62D55/20
摘要:
An improved method and apparatus are provided for sealing hollow pins which are commonly used as lubricant reservoirs in, e.g., track chain assemblies of crawler tractors, and linkage joints of earthmoving vehicles. One embodiment of the invention comprises a plug of elastomer material which has a lubricant passage axially therethrough, which passage receives an auxiliary plug means for the purpose of obturating the passage as well as causing radial expansion of the elastomer plug into positive engagement with a receiving axial bore in a hollow pin. The auxiliary expansion means takes the form of a screw, a spherical ball, or a headless plug employing a plurality of annular serrations. Another embodiment comprises a spherical ball which is received in a stepped, axial bore of a hollow pin and is retained therein by a Belleville washer. The invention facilitates refilling in the field of the lubricant reservoir contained within the pin.