Oil seal and bearing including oil seal
An oil seal and bearing technology, applied in the field of oil seals and bearings including the oil seal, can solve the problems that the temperature range of the oil seal material cannot meet the requirements of the intake air temperature and wear, and can reduce the overall package size, the small seal volume, and the seal. volume effect
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Embodiment 1
[0029] Such as figure 1 As shown, the center of the section of the oil seal of the present invention is a torsion point 1, and there are two or more legs 2 extending outward from the torsion point 1 on the torsion point 1, and the legs 2 constitute the sealing surface when sealing; between the oil seal and the bearing The multiple steps 3 provided on the outer surface in contact with the housing 7 form multiple sealing surfaces between the oil seal and the bearing housing 7 . The structure of the oil seal is simple, and the production method is simple and convenient, and only two cavity molds conforming to the shape of the oil seal are used.
[0030] Such as image 3 As shown, two oil seals are installed in the bearing housing 7 to form a complete bearing with the shaft and needle roller 9. For clarity, the two oil seals are named as the first oil seal 5 and the second oil seal 6 respectively. Preferably, the edges of the two or more sealing surfaces of the oil seal section ...
Embodiment 2
[0033] Such as figure 2 As shown, on the basis of Embodiment 1, a flange extending along the outer surface of the first oil seal 5 is provided on the outer surface of the first oil seal 5 on the bearing side in contact with the bearing housing 7, and the inner side of the bearing housing 7 is installed with a second A groove 8 matching the shape of the protrusion 4 on the outer surface of the first oil seal 5 is provided at the position of the first oil seal 5 . Such as image 3 As shown, when the first oil seal 5 is assembled into the bearing housing 7, the flange on the outer surface of the first oil seal 5 is embedded into the groove 8 on the bearing housing 7 to form an interlocking structure. When the shaft is pushed into the bearing shell 7, the first oil seal 5 is not turned over, which can prevent the first oil seal 5 from slipping into the bearing frame under the action of pressure. The multiple steps 3 provided on the outer surface of the second oil seal 6 on the ...
Embodiment 3
[0036] On the basis of the above embodiments, the diameter of the needle roller 9 used in the bearing is 7%-36% smaller than that of the bearing of the same specification, so as to reduce the sealing volume and overall package size, and further reduce the production of oil seal cost. The small sealing volume makes it possible to increase the length of the needle roller 9 in the bearing of the same size. By reducing the diameter of the needle roller 9, more needle rollers 9 can be accommodated in the same size space; the length is longer, A larger number of needle rollers 9 makes the contact area between the needle rollers 9 and the bearing housing 7 larger, thereby reducing the pressure on the contact surface and allowing the bearing to adopt a non-hardened bearing housing 7 . Preferably, the diameter of the shaft of the bearing is 8-10 mm, and the diameter of the needle roller 9 is 1.4-0.95 mm. When the diameter of the shaft is 10 mm, the diameter of the needle roller 9 is p...
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