本实用新型公开了一种具有良好密封效果的橡胶密封圈,包括呈环形圈体状的密封圈本体,密封圈本体的顶部设有朝外设置且横截面形状呈L形的外环密封部,外环密封部的侧边部位与密封圈本体的外侧壁之间形成有密封凹槽,外环密封部的顶部成型有横截面形状呈倒V形的环状凸体部,环状凸体部在密封圈本体的顶 The utility model discloses a rubber sealing ring which has a good sealing effect and comprises a sealing ring body which is in the form of an annular ring body, an outer ring sealing portion which is arranged outwardly and has an L-shaped cross section is arranged on the top of the sealing ring body, A seal groove is formed between the side portion of the outer ring seal portion and the outer side wall of the seal body, and the top portion of the outer ring seal portion is formed with an annular convex portion having an inverted V shape in cross section, the annular convex portion At the top of the ring body