Bidirectional angular contact thrust ball bearing assembly

Abstract

The invention discloses a bidirectional angular contact thrust ball bearing assembly. Two sides of the inner wall of an outer ring and the outer walls of the inner sides of two inner rings are respectively provided with outer trenches and inner trenches, wherein the outer trenches and the inner trenches are used for mounting a row of steel balls; two retainers respectively retain a row of steel balls and enable the steel balls to be separated circumferentially and uniformly; the thin end surfaces of the two inner rings are opposite and are provided with a preload regulating clearance; the nominal contact angle of the bearing assembly is 58 degrees-62 degrees; a seal ring is arranged between the outer wall of the outer side of each inner ring and the groove of the inner wall of the outer ring; the end surface of the outer ring is provided with an axial flange mounting through hole and an axial fat feed channel; the outer diameter of the outer ring is provided with a radial fat feed channel; the ports of the axial fat feed channel and the radial fat feed channel are all provided with oil filler plugs; and the outer diameter of the outer ring close to the end of the axial fat feed channel is provided with a circumferential dismounting groove which is convenient to clamp a bearing. The bearing assembly has a reasonable structure, is convenient to install, can bear radial and axial loading, is provided with pretension loading, has higher axial rigidity and can be lubricated again at a fixed period.

Description

【Technical field】 [0001] The invention relates to a bearing, in particular to a double-row angular contact thrust ball bearing assembly with a flange installation through hole and a grease feeding channel on the outer ring. 【Background technique】 [0002] Ball screws are often used as transmission elements in machine tools and mechanical equipment to convert rotary motion into linear motion, or convert torque into axial repetitive force. In order to obtain high-precision, high-efficiency and reversible transmission effects, the supporting structure used as a screw often needs to be able to bear radial loads, axial bidirectional loads, preloads and have high axial stiffness at the same time. The traditional support methods are mostly used in combination of two or more sets of bearings, using the force and bearing characteristics of each bearing to share the load and obtain the combined stiffness, but there are insufficient axial stiffness or large frictional resistance and he...

AI Technical Summary

Problems solved by technology

The traditional support method is mostly used in combination of two or more sets of bearings, using the force and bearing characteristics of each bearing to share the load and obtain the combined stiffness, but there are insufficient axial stiffness or large frictional resistance and heat generation defects, and the bearing selection The technical requirements for matching are high, and the accuracy of combined installation is not easy to guarantee; in recent years, a single set of double-row angular contact thrust ball bearings has been used as the application of the screw support, which can obtain high axial stiffness and low frictional resistance, but it is different from the two The combined structure of one set or multiple sets of bearings requires a special bearing mounting bracket (or bearing seat), and the precision of the bearing seat hole is high and the processing is difficult.

In addition, in order to prevent the cutting fluid, metal shavings and dust in the machine tool from entering the bearings and damaging the bearing lubrication or causing seizure, it is necessary to set up a suitable seal and special lubrication system for each set of bearings or bearing combinations. The structure is complex and uneconomical, and at the same time increases The structural size of the bearing bracket (or bearing housing) is limited, which limits the development of machine tools and mechanical equipment in a smaller and more compact direction

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