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    • 14. 发明专利
    • Bearing device
    • 空值
    • JP5172444B2
    • 2013-03-27
    • JP2008104767
    • 2008-04-14
    • 日立建機株式会社日本バルカー工業株式会社
    • 秀樹 秋田修 五木田暁子 佐藤英二 根来富義 山崎
    • F16C33/74F16J15/32
    • F16C33/74E02F9/006F16C11/045F16C33/102F16C2240/40F16C2350/26F16J15/166F16J15/3232F16J15/3276
    • A dust seal (20) is provided with a tubular fitting portion (20A), a bush end surface abutting portion (20B), a lip portion (20D) and a sealing projection (20E) integrally formed. The sealing projection (20E) is formed to project in an axially opposite direction to the lip portion (20D) from a radial inner section of the bush end surface abutting portion (20B) and abuts against a chamfered portion (14E) of a bush (14) in such a manner as to overlap the chamfered portion. Therefore, at the time of supplying lubricant such as grease between the bush (14) and a connecting pin (17), the sealing projection (20E) can prevent a part of the lubricant from entering between an end surface (14D) of the bush (14) and the bush end surface abutting portion (20B) of the dust seal (20) to maintain a sealed state therebetween. In consequence, the dust seal (20) can be stably held on the inner peripheral side of a boss member (12), preventing the pulling-out of the dust seal (20) by a lubricant agent supplying pressure.
    • 防尘密封(20)具有一体形成的管状嵌合部(20A),衬套端面抵接部(20B),唇部(20D)和密封突起(20E)。 所述密封突起(20E)形成为从所述衬套端面抵接部(20B)的径向内侧部朝向所述唇部(20D)的轴向相反的方向突出并与所述衬套的倒角部(14E)抵接 14)以与倒角部分重叠的方式。 因此,在衬套(14)和连接销(17)之间供给润滑剂等润滑剂的时候,密封突起(20E)能够防止一部分润滑剂进入衬套(14)的端面(14D) (14)和防尘密封件(20)的衬套端面抵接部(20B)之间保持密封状态。 因此,能够将防尘密封件20稳定地保持在凸台部件(12)的内周侧,防止灰尘密封件(20)由供给压力的润滑剂引出。
    • 20. 发明专利
    • Bearing device
    • 空值
    • JP4473082B2
    • 2010-06-02
    • JP2004275540
    • 2004-09-22
    • 日立建機株式会社
    • 修 五木田秀樹 秋田
    • F16C33/74F16J15/32
    • F16C33/74F16C11/045F16C2350/26
    • PROBLEM TO BE SOLVED: To provide a bearing device with a seal member whose come-off is prevented without the need for machining a boss member and a bush and which is easily fitted through the boss member. SOLUTION: On an outer peripheral face 19A1 of a cylindrical portion 19A of a dust seal 19, three come-off preventing protrusions 20 are provided for preventing the axial come-off of the dust seal 19 from a seal fitting hole 12B of an arm boss 12. Thus, the come-off preventing protrusions 20 are integrally formed as part of the dust seal 19 without the need for cutting work for the arm boss 12 and the bush 14. The come-off preventing protrusions 20 are easily provided on the dust seal 19. The come-off preventing protrusions 20 are elastically deformed when fitted through the seal fitting hole 12B of the arm boss 12, and so the dust seal 19 is easily fitted through the seal fitting hole 12B with general press-in work. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:为了提供一种具有密封构件的轴承装置,其在不需要加工凸起构件和衬套并且易于通过凸台构件安装的情况下防止脱落。 解决方案:在防尘密封件19的圆筒形部分19A的​​外周面19A1上设置有三个防脱突起20,用于防止防尘密封件19从密封装置孔12B的密封装配孔12B轴向脱落 因此,防脱突起20一体地形成为防尘密封19的一部分,而不需要对臂架12和衬套14进行切割加工。防脱突起20容易设置 防尘突起20通过臂架12的密封配合孔12B嵌合时弹性变形,因此防尘密封19易于通过密封装配孔12B与一般的压入 工作。 版权所有(C)2006,JPO&NCIPI