A kind of angular contact ball bearing cage

Abstract

The utility model relates to a bearing retainer, concretely relates to an angular contact ball bearing retainer, which comprises: a circular ring crown retainer body, a plurality of retainer beams are formed from one end direction to the other end direction along the circumference of the retainer body, a retainer pocket is formed between every two adjacent retainer beams, and a pocket opening of the retainer pocket is formed between the end portions of every two adjacent retainer beams; the retainer pocket is an open structure with a notch formed at the pocket opening, and a semi-enclosed form of the retainer is formed through the open pocket opening; the retainer adopts a semi-enclosed PPS retainer, which is convenient to install; the semi-enclosed retainer is light in weight, reduces the rotating resistance of the steel ball, and improves the rotating speed.

Description

Technical Field

[0001] This utility model relates to bearing cages, specifically to a cage for an angular contact ball bearing, and belongs to the field of bearing technology. Background Technology

[0002] Angular contact ball bearings are commonly used in machine tools, with speeds reaching over 8000 rpm. Common cage materials for angular contact ball bearings include PPS and PEEK, and the cage structure is a full enclosure type. This type of cage is relatively heavy, resulting in high rotational resistance of the steel balls, which may affect the speed of the angular contact ball bearing. Furthermore, the full enclosure design presents installation difficulties. Additionally, the lubrication performance of angular contact ball bearings needs to be improved. Utility Model Content

[0003] In view of the current use of angular contact ball bearing cages in the prior art, the purpose of this utility model is to provide an angular contact ball bearing cage with a structure that can reduce cage weight and increase angular contact ball bearing speed; it is lightweight, easy to install, and easy to lubricate.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: an angular contact ball bearing cage, comprising: a circular crown-shaped cage body, with a plurality of cage beams formed along the circumference of the cage body from one end to the other end, a cage pocket formed between each pair of adjacent cage beams, and a pocket opening of the cage pocket formed between the ends of each pair of adjacent cage beams;

[0005] Furthermore, the retainer pocket is an open structure with a notch at the pocket opening, forming a semi-enclosed form of the retainer through the open pocket;

[0006] Furthermore, locking points are formed on both sides of the opening of each cage pocket;

[0007] Furthermore, the two locking points of each cage pocket are formed by machining the opposite sides of the ends of two adjacent cage beams;

[0008] Furthermore, each cage beam has a groove on its inner diameter surface, with the groove opening facing the center of the cage and the bottom of the groove close to the outer diameter of the cage beam;

[0009] Furthermore, the groove is designed as a right-angled plane;

[0010] Furthermore, the groove depth of the cage beam is 0.4 times the thickness of the entire cage beam; when the cage is ball-guided, the center of rotation of the cage is also the center of rotation of the entire bearing. The center of rotation of the bearing determines the accuracy, rigidity, speed, and stability of the bearing rotation, so it is not advisable to have a hole at the center of rotation of the cage. To maximize the lubrication of the steel balls and the cage, 0.4 is selected as the cage groove depth coefficient.

[0011] Furthermore, the grooves of each cage beam are at the same height on the inner diameter of their respective cage beams, thus forming an annular groove around the inner diameter of the cage.

[0012] Furthermore, the end surface of each cage beam is a horizontal plane, and the two ends of the horizontal plane are respectively connected to the pocket surface and form a protrusion at the junction, which forms the locking point of the cage pocket.

[0013] Furthermore, a gap is left between the retainer pocket and the steel ball.

[0014] In the design methodology for angular contact ball bearings, the pocket size is defined as Δc = 1.004Dw + 0.12. The gap between the pocket and the steel ball is for lubrication and heat dissipation. When a lightweight semi-cage is used and the inner diameter of the cage has lubrication grooves, the bearing lubrication is improved, frictional heat is reduced, and the cage pocket size can be appropriately reduced. For this structure, the cage pocket size is calculated as Δc = 1.002Dw + 0.1. Reducing the cage pocket size helps the bearing operate smoothly and reduces vibration. Furthermore, the cage end face in the same direction as the bottom of the pocket transitions with the inner and outer diameter surfaces of the cage to form an outer chamfer. This outer chamfer is a sloped surface design with a slope angle of 45°.

[0015] The angular contact ball bearing using the cage of this application includes: an outer ring, an inner ring, a cage, and a plurality of steel balls; the plurality of steel balls are spaced apart in each pocket of the cage and located in the raceway between the outer ring and the inner ring; the cage forms a semi-enclosed shape for the steel balls through a cage beam, and the steel balls are placed in the pockets such that the end of the cage beam covers beyond the center point of the steel ball and reaches two-thirds of the area of ​​the steel ball.

[0016] The beneficial effects of using this cage design are:

[0017] The cage adopts a semi-enclosed PPS cage, which is easy to install; the semi-enclosed cage is lightweight, reduces the rotational resistance of the steel balls, and increases the rotational speed;

[0018] Cage grooves are provided on several cage beams in the inner diameter direction of the cage, forming annular circumferential lubrication channels on the cage, which facilitates the storage of grease / oil and lubrication.

[0019] This cage has the advantages of novel structure, convenient processing, easy installation, less prone to ball detachment, increased rigidity, and enhanced load-bearing capacity. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the cage of this utility model.

[0021] Figure 2 for Figure 1 A three-dimensional image.

[0022] Figure 3 This is a structural diagram of the bearing of this utility model.

[0023] In the figure, 1. Frame, 1.2. Cage beam, 1.3. Cage pocket, 1.4. Pocket opening, 1.5. Locking point, 1.6. Inner diameter surface of cage beam, 1.7. Groove, 1.8. End surface of cage beam, 1.3.1. Pocket surface, 1.9. Outer chamfer of cage, 2. Outer ring, 3. Inner ring, 4. Steel ball, 4.1. Center point of steel ball. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] like Figure 1 , 2 The angular contact ball bearing cage shown includes: an annular crown-shaped cage body 1, with a plurality of cage beams 1.2 formed along the circumference of the cage body 1 from one end to the other end, a cage pocket 1.3 formed between each pair of adjacent cage beams 1.2, and a pocket opening 1.4 of the cage pocket 1.3 formed between the ends of each pair of adjacent cage beams 1.2;

[0026] The retainer pocket 1.3 is an open structure with a notch formed at the pocket opening 1.4, forming a semi-enclosed form of the retainer through the open pocket 1.3;

[0027] The semi-enclosed structure of this design facilitates the installation of the steel ball 4; the cage is made of PPS material.

[0028] Furthermore, locking points 1.5 are formed on both sides of each retainer pocket 1.3 pocket opening 1.4 to prevent the steel ball 4 from falling off when rotating;

[0029] Furthermore, the two locking points 1.5 of each cage pocket 1.3 are formed by machining the opposite sides of the ends of two adjacent cage beams 1.2;

[0030] Furthermore, each cage beam has a groove 1.7 on its inner diameter surface 1.6, with the groove opening facing the center of the cage and the bottom of the groove close to the outer diameter of the cage beam;

[0031] Furthermore, the groove 1.7 is a right-angled plane design;

[0032] Furthermore, the groove depth of the retainer beam 1.7 is 0.4 times the thickness of the entire retainer beam;

[0033] Furthermore, the grooves 1.7 of each cage beam are at the same height position on the inner diameter of their respective cage beams 1.2, thereby forming an annular groove around the inner diameter of the cage, which can store grease / oil for easy lubrication.

[0034] Furthermore, the end surface 1.8 of each cage beam is a horizontal plane, and the two ends of the horizontal plane are respectively connected to the pocket surface 1.3.1 and form a protrusion at the junction, which forms the locking point 1.5 of the cage pocket 1.3.

[0035] Furthermore, a gap is left between the retainer pocket 1.3 and the steel ball 4, allowing lubricating oil / grease to easily enter.

[0036] Furthermore, the cage end face in the same direction as the bottom of the pocket 1.3 transitions with the inner and outer diameter surfaces of the cage to form an outer chamfer 1.9, which is a sloped surface design with a slope angle of 45°.

[0037] like Figure 3 As shown, the angular contact ball bearing using the cage of this application includes: an outer ring 2, an inner ring 3, a cage, and a plurality of steel balls 4; the plurality of steel balls 4 are spaced within each pocket 1.3 of the cage and located in the raceway between the outer ring 2 and the inner ring 3; the cage forms a semi-enclosed shape for the steel balls 4 through the cage beam 1.2, and the steel balls 4 are placed in the pocket 1.3 such that the end position of the cage beam 1.2 covers beyond the center point 4.1 of the steel ball and reaches two-thirds of the area of ​​the steel ball 4.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A cage for an angular contact ball bearing, characterized in that, include: The ring-shaped frame has several retainer beams formed along its circumference from one end to the other. A retainer pocket is formed between each pair of adjacent retainer beams, and the pocket opening is formed between the ends of each pair of adjacent retainer beams. A groove is formed on the inner diameter surface of each retainer beam, with the groove opening facing the center of the retainer and the bottom of the groove close to the outer diameter of the retainer beam.

2. The angular contact ball bearing cage according to claim 1, characterized in that: The retainer pocket is an open structure with a notch at the opening, forming a semi-enclosed form of the retainer.

3. The angular contact ball bearing cage according to claim 1, characterized in that: Locking points are formed on both sides of the opening of each cage pocket.

4. The angular contact ball bearing cage according to claim 3, characterized in that: The two locking points of each cage pocket are formed by machining the opposite sides of the ends of two adjacent cage beams.

5. A cage for an angular contact ball bearing according to claim 1, characterized in that: The groove is designed as a right-angled plane.

6. The cage for an angular contact ball bearing according to claim 1, characterized in that: The groove depth of the cage beam is 0.4 times the thickness of the entire cage beam.

7. The cage for an angular contact ball bearing according to claim 1, characterized in that: The grooves of each cage beam are positioned at the same height on the inner diameter of their respective cage beams, thus forming a ring-shaped groove that surrounds the inner diameter of the cage.

8. The angular contact ball bearing cage according to claim 1, characterized in that: The end surface of each cage beam is horizontal, and the two ends of the horizontal surface are respectively connected to the pocket surface and form a protrusion at the junction, which forms the locking point of the cage pocket.

9. A cage for an angular contact ball bearing according to claim 1, characterized in that: The cage end face, which is in the same direction as the bottom of the pocket, transitions with the inner and outer diameter surfaces of the cage to form an outer chamfer. The outer chamfer of the cage is a sloped surface design with a slope angle of 45°.

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