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Distinctive depiction of adjustable clearance rolling ball bearings (1)
Source: Bearing network time: 2013-12-08
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Rolling ball bearings are widely used in production and daytime due to their many advantages such as low frictional resistance, high starting efficiency, high efficiency, high rotation precision, smooth and simple, and convenient replacement. However, due to their high precision of production and process, the process is disordered. The standard rolling bearings are produced by special machines; they are produced by professional factories. Because the original parts are drawn between the inner ring, the outer ring and the rolling body of the bearing, there are few adjustable links; the important precision target diameter of the bearing The clearance is mainly ensured by machining and public service. This way, even if a higher precision machine tool is used to machine the bearing parts; because of the inevitable heap error, it is difficult to use the direct installation method to reach the demand. Accuracy. Usually must be selected by measurement; installed by group installation method; but the accuracy is limited; the price of high-precision bearings is high. The gap between the bearings and the wear caused by the wear can not be compensated; Its practice life is reduced; the formation of dross. Follow the development of production; urgent need to deal with this skill problem. To this end; the author has been analyzed And research; found the main factors that restrict the radial clearance accuracy of the bearing. Then proceed from the reasonable description of the layout of the bearing; draw a novel layout; make the radial clearance of the bearing can be easily adjusted; The above technical problems. After trial use; the effect is better;
1 Depicting the idea, working principle and detailed layout are well known; it is necessary to adjust the radial clearance of the bearing; it is necessary to change the relative azimuth connection of the outer ring, the inner ring and the rolling body; the intuitive method is to make the outer diameter of the inner ring or The inner diameter of the outer ring can be changed according to the requirements. For the ball bearing, there is a way to machine the inner hole of the inner ring of the bearing into a certain taper; the cooperating journal also produces a corresponding taper. The additional equipment on the shaft changes the orientation of the inner ring on the shaft; deforms the inner ring and then causes the outer diameter to be changed; to adjust the clearance of the bearing. Public and private; this is a better method; the problem can be dealt with to a certain extent Therefore, it has been used up to now. However, there are also several significant deficiencies. First, the amount of adjustment is limited (even very small); when there is a large gap, there is no power. Second, the taper at the journal needs to be processed with higher precision; Set up additional conditioning equipment; make the shaft manufacturing process messy. Third, the inner ring accepts a large prestress; and it is a circumferential tensile stress; the bearing strength is extremely suffocating; sometimes the inner ring or even the adjustment will "do not fight itself" .thus Visible; this traditional approach is not reasonable; there is a need for improvement.
Analysis of the bearing layout can be known; the inner ring is now a full article; there seems to be no potential to dig. The roll is "iron plate"; significant "unprofitable". Naturally; we turn our eyes to the outer ring Come up. But this part is really simple and simple; it can't be started with the usual idea; it is necessary to find another way. After meditation; ask for more; repeatedly scrutinize; finally realize it. Comprehend: change the radial travel of the bearing Gap; as if the military is the same; it is not only forced from the front (radial); it can also be taken from the side (axial). The condition is that it is necessary to break the bundle of traditional ideas and the confinement of the customary forces; It is unconventional. Therefore, the outer ring of the bearing is conceived along the cross section; it is divided into two (reverse thinking; simplified to complex). The left and right halves can be moved relative to each other; then by the inner ring The interaction between the special curved surface and the rolling body; converting the relative axial displacement of the outer ring into the radial displacement of the rolling body; then receiving the direct modification of the radial orientation between the inner ring, the outer ring and the rolling body; Adjustment The intention of the gap. Based on this; we can have the following skill plan: change the outer ring of the rolling bearing from the whole type to the axial split combination, with the double row rolling body, supplemented by the adjusting gasket group. Increase or decrease the thickness of the adjusting gasket to conveniently adjust the radial clearance of the bearing to the required value; finally, install the outer casing with the threaded connection as a whole. Similarly, when the bearing works for a period of wear, it only needs to properly reduce the adjusting gasket. The thickness; can eliminate the bad play at your fingertips; the original accuracy of rehabilitation. The intention of reaching the correction.
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