An angular contact ball bearing with a 40° contact angle

Abstract

The utility model relates to bearing design technical field, concretely to a kind of 40 degree contact angle's angular contact ball bearing, including outer ring, inner ring, retainer and steel ball;The outer ring is provided with outer raceway, the outer ring is provided with ladder, the ladder is set between the outer raceway with the small end surface of the outer ring, close to the outer raceway;The inner ring is provided with inner raceway;The retainer is set between the outer ring and inner ring;The steel ball is set in the pocket of the retainer, one side is contacted with the outer raceway, the other side is contacted with the inner raceway.It is designed to a kind of novel 40 degree angular contact ball design method for reducing material cost, production cost, increase bearing lubricating effect.

Description

Technical Field

[0001] This utility model relates to the field of bearing design technology, specifically to an angular contact ball bearing with a 40° contact angle. Background Technology

[0002] In general, 40° angular contact ball bearings have a large cage capacity for the steel balls, resulting in poor heat dissipation during bearing rotation. During operation, a large amount of sliding friction is generated between the steel balls and the cage pockets, leading to increased frictional power consumption and higher operating temperature. At the same time, the manufacturing cost of the copper cage is high.

[0003] In order to ensure that the steel balls are not damaged during the loading of angular contact ball bearings, the outer ring locking size needs to be guaranteed. Depending on the process, this size generally needs to be processed three to four times. For thin and light series, multiple grinding will cause the outer ring outer diameter perpendicularity to exceed the tolerance, which can easily lead to scrap and seriously affect the processing efficiency. Utility Model Content

[0004] In view of the deficiencies of the prior art, this utility model provides an angular contact ball bearing with a 40° contact angle, which is a new type of 40° angular contact ball bearing designed to reduce material costs, production costs and increase bearing lubrication effect.

[0005] To achieve the above objectives, the present invention provides a 40° contact angle angular contact ball bearing, comprising an outer ring, an inner ring, a cage, and steel balls; the outer ring is provided with an outer raceway and a step, the step being disposed between the outer raceway and the small end face of the outer ring, close to the outer raceway; the inner ring is provided with an inner raceway; the cage is disposed between the outer ring and the inner ring; the steel balls are disposed in the pockets of the cage, one side contacting the outer raceway and the other side contacting the inner raceway.

[0006] Furthermore, the large end face transitioning from the outer raceway to the outer ring is a plane.

[0007] Furthermore, the small end face transitioning from the stepped structure to the outer ring is an inclined surface.

[0008] Furthermore, the large end face transitioning from the inner raceway to the inner ring is a plane.

[0009] Furthermore, the small end face transitioning from the inner raceway to the inner ring is a plane.

[0010] Furthermore, the tilt angle β of the cage is 12°~15°.

[0011] Furthermore, the tilt angle β of the cage is 14°.

[0012] Furthermore, the tilt angle of the outer ring assembly lock opening is 3°±30'; the stepped lock opening constraint conditions are 2≤m≤4, R=2.

[0013] Furthermore, the inner and outer diameter coefficients of the inner ring are selected in the range of 0.1 to 0.15.

[0014] The design method for the angular contact ball bearing with a 40° contact angle includes the following steps: S100, Cage Design: Cage wall thickness S = Kj * steel ball diameter Dw; Kj ranges from 0.30 to 0.33; Cage tilt angle β = 12° to 15°; 1) Cage outer diameter at midpoint: Dc4=Dwp+2 / 3*Kj*Dw-4 / 3*Kj*Dw*[sin(β / 2)]²; 2) Diameter at the midpoint of the inner diameter surface of the cage: Dc41=Dc4-2*Kj*Dw*cosβ; 3) Outer diameter of the cage before corner trimming: Dc2=Dwp+△c*tanβ+2*Kj*Dw / 3*cosβ; 4) Large inner diameter of the cage: Dc21=Dc2-2Kj*Dw / cosβ; 5) Small inner diameter of the cage before corner trimming: Dc31 = Dc21 - 2 * Bc * tanβ; 6) Small outer diameter of the cage: Dc3 = Dc31 + 2 * Kj * Dw / cosβ; 7) Outer diameter of the cage after chamfering: Dc = Dc⁴ + (2 + Δc) * sinβ, with values ​​rounded down to 1 or 0.5; 8) Inner diameter of the cage after corner removal: Dc1 = Dc41 - △c*sinβ, with values ​​rounded down to 1 or 0.5; 9) Design of steel ball sag: T1=(0.01~0.015)*Dw+2 / 3*S+0.5*Dw; The T2 value was obtained by drawing a scale graph; S200, Outer Ring Design: The tilt angle at the assembly lock opening is uniformly 3°±30'; Stepped lock opening constraint conditions: 2≤m≤4, R=2; S300, Inner Ring Design: Inner ring small flange diameter d3 = inner raceway diameter di + K3i * Dw; K3i = 0.1~0.15.

[0015] The beneficial effects of this utility model are: it is designed for single-row 40-degree angular contact ball bearings used in general machinery; it is a new type of 40-degree angular contact ball bearing designed to reduce material costs, production costs, and increase bearing lubrication; the main body is based on a brand-new design concept of bearing cage and optimized design of bearing rings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the cage structure of this utility model; Figure 3 This is a schematic diagram of the structure of the cage and steel ball of this utility model; Figure 4 for Figure 1 A magnified view of part A; Figure 5 This is a schematic diagram of the inner ring structure of this utility model; In the diagram: 100, outer ring; 110, outer raceway; 120, step; 130, small end face of the outer ring; 140, large end face of the outer ring. 200, Inner ring; 210, Inner raceway; 220, Small end face of the inner ring; 230, Large end face of the inner ring. 300. Cage 400. Steel ball. Detailed Implementation

[0017] 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.

[0018] like Figure 1-5 As shown, one embodiment of this utility model discloses an angular contact ball bearing with a 40° contact angle, comprising an outer ring 100, an inner ring 200, a cage 300, and steel balls 400. The outer ring is provided with an outer raceway 110 and a step 120, which is located between the outer raceway 110 and the small end face 130 of the outer ring, close to the outer raceway 110. The inner ring is provided with an inner raceway 210. The cage 300 is located between the outer ring 100 and the inner ring 200. The steel balls 400 are located in the pockets of the cage 300, with one side contacting the outer raceway 110 and the other side contacting the inner raceway 210.

[0019] In one embodiment, the transition from the outer raceway 110 to the large end face 140 of the outer ring is a plane.

[0020] In one embodiment, the small end face 130 transitioning from the step 120 to the outer ring is an inclined surface.

[0021] In one embodiment, the transition from the inner raceway 210 to the large end face 230 of the inner ring is a plane.

[0022] In one embodiment, the small end face 220 transitioning from the inner raceway 210 to the inner ring is a plane.

[0023] In one embodiment, the tilt angle β of the retainer 300 is 12°~15°.

[0024] Furthermore, the tilt angle β of the cage 300 is 14°.

[0025] In one embodiment, the tilt angle of the mounting lock opening of the outer ring 100 is 3°±30'; the lock opening constraint condition of the step 120 is 2≤m≤4, R=2.

[0026] In one embodiment, the inner and outer diameter coefficients of the inner ring are selected in the range of 0.1 to 0.15.

[0027] The design method for the angular contact ball bearing with a 40° contact angle includes the following steps: like Figure 2 As shown, the design of S100 and cage 300 is as follows: Cage 300 wall thickness (S) = Kj * steel ball 400 diameter (Dw); Kj ranges from 0.30 to 0.33; Cage 300 tilt angle (β) = 12° to 15°; 1) Cage 300 outer diameter surface midpoint diameter: Dc4=Dwp+2 / 3*Kj*Dw-4 / 3*Kj*Dw*[sin(β / 2)]²; 2) Cage 300 inner diameter surface midpoint diameter: Dc41=Dc4-2*Kj*Dw*cosβ; 3) Cage 300mm outer diameter before corner trimming: Dc2=Dwp+△c*tanβ+2*Kj*Dw / 3*cosβ; 4) Cage with a 300mm inner diameter: Dc21=Dc2-2Kj*Dw / cosβ; 5) Cage 300, before corner trimming, small inner diameter: Dc31 = Dc21 - 2 * Bc * tanβ; 6) Cage with a minor outer diameter of 300: Dc3 = Dc31 + 2 * Kj * Dw / cosβ; 7) Outer diameter of cage after 300mm corner trimming: Dc = Dc⁴ + (2 + Δc) * sinβ, (rounding down to 1 or 0.5). 8) Inner diameter of cage after 300mm corner trimming: Dc1 = Dc41 - △c*sinβ, (rounding down to 1 or 0.5). 9) Steel ball sag design of 400mm: such as Figure 3 As shown, T1=(0.01~0.015)*Dw+2 / 3*S+0.5*Dw; The T2 value was obtained by drawing a scale graph; like Figure 4 As shown, for S200 and outer ring design: the inclination angle at the assembly lock is uniformly 3°±30'; the constraint condition for the stepped 120 lock is 2≤m≤4, R=2; like Figure 5 As shown, S300, inner ring design: inner ring small flange diameter (d3) = inner raceway 210 diameter (di) + K3i*Dw; K3i=0.1~0.15.

[0028] It should be noted that the Cage 300 is innovative: 1. The encapsulation capacity of the cage 300 on one side relative to the steel ball 400 is defined in the range of 0.30~0.33. While ensuring the strength of the cage 300, the encapsulation capacity is reduced, which improves the fluidity of the grease or lubricating oil in the bearing, promotes bearing lubrication, and also greatly reduces the amount of copper used. 2. The bearing rotation center is closer to the outer diameter side of the cage 300, accounting for 1 / 3 of the cross-sectional thickness of the cage 300. This ball structure design increases the constraint of the retaining cone surface on the steel ball 400, which is more conducive to the stability of bearing rotation, making the rotation more stable and reducing the bearing vibration value. 3. The tilt angle of the inclined cage 300 has been optimized from the original fixed 12° to a range of 12°~15°. Within this range, it is convenient to adjust the size of the large inner diameter (Dc21) of the cage 300 and the large inner and outer diameters of the bearing inner ring, avoiding rotational interference caused by small clearance.

[0029] Innovative bearing rings: 1. Outer ring stepped 120 locking design: The outer ring locking is composed of 120 steps with a 1mm difference between the upper and lower parts. The steps are tangentially transitioned by a 2mm radius arc. This transition can effectively reduce the damage to the steel balls 400 when the bearing is installed. At the same time, it controls the locking size (0m) and keeps the value between 2 and 4mm, reducing the size of the locking surface and improving the processing efficiency. It also reduces the deviation of the outer ring outer diameter perpendicularity caused by the processing of the locking.

[0030] 2. The selection range for the inner ring's smaller inner and outer diameter coefficient is (0.1~0.15), that is, the smaller inner and outer diameter (d3) = inner raceway 210 diameter (di) + (0.1~0.15) * steel ball 400 diameter (Dw); this structural design, while satisfying the requirement of locking the steel ball 400, is more conducive to bearing assembly, and at the same time increases the space for the bearing grease or lubricating oil to move, which is more conducive to lubrication.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] In this invention, 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 through an intermediate medium. Furthermore, "above," "over," and "on top" of 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. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. 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 intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. An angular contact ball bearing with a 40° contact angle, characterized in that: include The outer ring is provided with an outer raceway, and the outer ring is provided with a step, which is located between the outer raceway and the small end face of the outer ring, close to the outer raceway; The inner ring is equipped with an inner raceway; A retainer is disposed between the outer ring and the inner ring; The steel ball is disposed in the pocket of the cage, with one side in contact with the outer raceway and the other side in contact with the inner raceway.

2. The angular contact ball bearing with a 40° contact angle according to claim 1, characterized in that: The large end face from the outer raceway to the outer ring is a plane.

3. The angular contact ball bearing with a 40° contact angle according to claim 1, characterized in that: The small end face from the step to the outer ring is an inclined surface.

4. The angular contact ball bearing with a 40° contact angle according to claim 1, characterized in that: The large end face from the inner raceway to the inner ring is a plane.

5. The angular contact ball bearing with a 40° contact angle according to claim 1, characterized in that: The small end face from the inner raceway to the inner ring is a plane.

6. The angular contact ball bearing with a 40° contact angle according to claim 1, characterized in that: The tilt angle β of the cage is 12°~15°.

7. The angular contact ball bearing with a 40° contact angle according to claim 6, characterized in that: The cage has a tilt angle β of 14°.

8. The angular contact ball bearing with a 40° contact angle according to claim 1, characterized in that: The tilt angle of the outer ring assembly lock opening is 3°±30'; the stepped lock opening constraint conditions are 2≤m≤4, R=2.

9. The angular contact ball bearing with a 40° contact angle according to claim 1, characterized in that: The range of the inner and outer diameter coefficients of the inner ring is 0.1 to 0.15.

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