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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Dynamic depiction of adjustable clearance rolling ball bearings Distinctive depiction of adjustable clearance rolling ball bearings
Rolling ball bearings are widely used in production and daytime due to their many advantages such as low conflict resistance, high starting speed, high power, high rotation precision, smooth and simple, and convenient replacement. However, due to their high production precision requirements, the process is disorderly; 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 mechanical machining. 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 direct equipment to reach the demand. Accuracy. Usually must be selected by measurement; equipment is used by group equipment method; but the accuracy is limited; the price of high-precision bearings is high. The clearance caused by the wear of the bearing during use is also unsatisfactory; The practice uses the decline in the number of life; 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; /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
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 process the inner hole of the inner ring of the bearing into a certain taper; the cooperating journal also processes the 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 mutual effect of 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; and then receiving the effect of directly changing 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, the outer joint of the outer casing is threaded. The same reason; when the bearing is worn for a period of time; The thickness; can eliminate the bad play at your fingertips; the original accuracy of rehabilitation. The intention of reaching the correction.
Needless to say; this is a brand new plan; originality, feasibility and practicality. The bearing diagram with the novel layout depicted in the above principle is shown in Figure 1. The piece 1 and 4 are separated. Circumference; external thread is machined on piece 1; internal thread is machined on piece 4; finely mated with each other. To ensure the strength of the outer ring and the need for custom thread tamping; triangular fine thread should be selected; Outer ring thickness. Piece 2 is steel ball; double row arrangement and radial full cloth are adopted; however, satisfactory empty space should be left between steel balls; avoid steel ball “too squeezedâ€; conflict with each other to reduce bearing power. In order to adjust the gasket group; a variety of different thickness standards should be prepared; in order to select the combination. If possible, it can also participate in the chrysanthemum elastic gasket; it is more useful to prevent the thread from being loose. The 5 is the inner ring of the bearing; It is characterized by left-right symmetry; a special curved ballway with a skew on its outer circle; a device for facilitating the rollover; and an effect of adjusting the play. In addition, four to six uniforms are provided on each end face of the outer ring. Wrench hole; used to puncture special tools during adjustment Tighten the thread. The above layouts are simple and clear; the lack of surprise is still the depiction of the fairway curve on the inner and outer rings; it is the key to victory and defeat; it can't be careless. It must be satisfied with the basic needs of adjusting the gap. More important factors such as extra load, touch intensity, fatigue life, and processing techniques should be considered. Fortunately, many elders have done a lot of deep research work and are effective; many materials and experiences are available for learning; Benefits are very low; here, I am grateful. Limited to the length; here is not discussed.
2 Features of the depiction (1) Simple processing: Because there is a central adjustable link; the processing scale of the part can be greatly relaxed; the scrap rate is also reduced exponentially. Together, the accuracy requirement for the machine tool can be reduced. It makes it possible to machine high-precision bearings on general precision machine tools. The skill level of workers can also be appropriately reduced; it has certain economic benefits.
(2) Convenience of equipment and equipment: After the outer ring is made into a component type; it can conveniently adjust the radial clearance of the bearing to the ambition value; it can reach higher precision without using the grouping device method. The equipment on the shaft is also very Convenience; no additional adjustment equipment is added; the layout of the whole machine is simplified.
(3) Improve the force situation: the double-row rolling body can be used to increase the bearing capacity; and can accept the two-way axial force.
(4) Reducing the variety of parts: After the outer ring is made into a component type; the roll body can be covered on the fairway; this can save the cage. This can also reduce the process; improve the carrying capacity; it can be said that it is more than one effort.
(5) Protection and repair convenience: When the bearing is out of play due to wear and tear; only need to properly reduce the thickness of the adjustment pad; it can reduce the clearance; the original accuracy of the rehabilitation; correspondingly extend the service life of the bearing. In addition; when only a single component is abnormally damaged; it is also possible to replace the damaged part to correct the bearing; or even the old as new; it is a good way to get rid of it. 1. 2 lack of (1) increased outside The process of cutting the inner and outer threads on the ring. And because of the existence of the thread, the stress gathering is easy to occur; together, the heat 1P disposal becomes difficult.
(2) The axial dimension of the bearing is relatively large; and because of the randomness of the thickness of the adjusted gasket, there is a large shake.
(3) The outer ring needs to be thickened; the data consumption is increased.
The adjustable clearance rolling bearing analyzed here has the advantages of novel concept, reasonable layout, convenient equipment and easy repair. Especially after the outer ring of the bearing is changed from the whole type to the axial split type, the adjustment of the bearing clearance is made. The problem is easy to solve; it can be read by colleagues. This drawing can also be extended to other types of bearing depiction. The depiction is a non-standard bearing depiction. There are still many deep problems to be explored; the lack of need to be disposed of. Realistically hope to get the guidance and assistance of peer professors.
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Distinctive depiction of adjustable clearance rolling ball bearings
Source: Bearing network time: 2018-01-13