The angular contact ball bearing of outer astragal depot fat ditch
Technical field
The present invention relates to the angular contact ball bearing of outer astragal depot fat ditch, the high speed that particularly relates to a kind of raceway sideband depot fat ditch at bearing outer ring seals accurate angular contact ball bearing.
Background technique
The accurate angular contact ball bearing that the high speed seal gease is lubricated, be widely used in the various electric main shafts, the grease lubrication angular contact ball bearing is compared with the bearing of traditional oil mist lubrication, the grease lubrication angular contact ball bearing does not have the pollution of mist of oil to electric main shaft Environmental Conditions, save the pressure gas source that mist of oil is used simultaneously, saved the energy.The bearing of grease lubrication just can use behind the lubricating grease of packing into always, and is certain with the fat amount, and the bearing of oil mist lubrication as long as use at the beginning, will have mist of oil constantly to send into bearing, the electric main shaft of general oil mist lubrication uses the oil that will consume 300ml in 8 hours, and is very big to the consumption of oil.Use the electric main shaft of grease lubricating bearing, the length of spreadable life is decided by the life-span of bearing, and the life-span of bearing is said in a sense, depends on the length of the effective date of lubricating grease in the bearing.Lubricating grease is in the bearing rotation, near the steel ball that rolls, also can wriggle, new fat is wriggled to scrollable area, the old fat of scrollable area is wriggled near scrollable area, so the lubricating grease in the bearing, what can enter scrollable area is only effectively lubricating fat, can not enter the lubricating grease of scrollable area, also just become ineffective lubrication fat, the scrollable area if the some more lubricating grease of energy all have an opportunity to enter, the life-span of bearing also can prolong with regard to nature.Prior art is because grease lubricating bearing is subjected to structural limitations, and the depot fat amount is few, is restricting the working life of grease lubrication angular contact ball bearing always, thereby has also influenced the life time of electric main shaft.
Summary of the invention
The objective of the invention is in order to overcome the shortcoming of prior art, a kind of depot fat device that is shaped in bearing outer ring is provided, increase the capacity of effectively lubricating fat, improve bearing working life, thereby prolong the angular contact ball bearing of the outer astragal depot fat ditch of electric main shaft spreadable life.
The angular contact ball bearing of the outer astragal depot fat ditch of the present invention, comprise outer ring, inner ring, retainer and steel ball are set between inner ring and outer ring, the seal ring that is fixed on the inside and outside circle are arranged, it is characterized in that the raceway limit of described outer ring is shaped on the depot fat ditch at the two ends of retainer.
The angular contact ball bearing of the outer astragal depot fat ditch of the present invention, be shaped on a depot fat ditch on the raceway limit of outer ring, can increase by 25% fat amount than conventional angular contact ball bearing, particularly the position of depot fat ditch is extremely near from runner limit and steel ball, lubricating grease in the ditch easily enters raceway and becomes effective fat, the seal ring design of the two ribs in outer ring simultaneously, formed a more airtight little space jointly with the retainer of outer guiding, fat is difficult for leaking, and obtain the working life that makes bearing prolonging, solved and restricted the working life of grease lubrication angular contact ball bearing for a long time, thereby prolonged the life time of electric main shaft, obtained beyond thought effect.
Description of drawings
Fig. 1 is the structural representation of the angular contact ball bearing of the outer astragal depot fat ditch of the present invention;
Fig. 2 is the outer ring schematic representation of the angular contact ball bearing of the outer astragal depot fat ditch of the present invention;
Embodiment
The present invention relates to the angular contact ball bearing of outer astragal depot fat ditch, as Fig. 1-shown in Figure 2, comprise outer ring 1, inner ring 2, retainer 5 and steel ball 4 are set between inner ring and outer ring, at the two ends of retainer 5 seal ring 3 that is fixed on the inside and outside circle is arranged, it is characterized in that the raceway limit of described outer ring 1 is shaped on depot fat ditch 11.Raceway limit in the outer ring is shaped on the depot fat ditch, can increase by 25% fat amount than conventional angular contact ball bearing, particularly the position of depot fat ditch is extremely near from runner limit and steel ball, lubricating grease in the ditch easily enters raceway and becomes effective fat, the seal ring design of the two ribs in outer ring simultaneously, formed a more airtight little space jointly with the retainer of outer guiding, fat is difficult for leaking, and obtain the working life that makes bearing prolonging, solved the working life that is restricting the grease lubrication angular contact ball bearing for a long time, thereby prolonged the life time of electric main shaft, obtained beyond thought effect.