Bearing cap, bearing comprising bearing cap and assembly method of bearing

Abstract

The bearing comprises a bearing body and at least one bearing cover, the bearing body comprises a bearing inner ring and a bearing outer ring located on the radial outer side of the bearing inner ring, and the bearing outer ring comprises a blocking part located on the end face of the bearing outer ring and a sealing groove adjacent to the blocking part; the bearing cover is used for being matched with the bearing body, so that a bearing cavity is formed between the bearing cover and the bearing body, and the bearing cover comprises an inner lip section matched with the bearing inner ring of the bearing body, an outer lip section matched with the sealing groove of the bearing body and a connecting section located between the inner lip section and the outer lip section. The ratio of the width of the sealing groove to the original width of the outer lip section in the axial direction before being matched is within the range of 0.4-0.65, and the outer lip section of the bearing cover deforms to be contained in the sealing groove of the bearing outer ring in the state that the bearing cover and the bearing body are assembled.

Description

Technical Field

[0001] The present disclosure relates to the field of bearings, and in particular to a bearing cover, a bearing having the bearing cover, and a bearing assembly method. Background Art

[0002] Bearings have been widely used in more and more fields, and the market's requirements for bearings are getting higher and higher. For example, more and more bearings are required to be equipped with bearing covers to avoid interference from external contaminants and leakage of lubricants. The metal bearing cover is installed between the inner ring and the outer ring of the bearing by press fitting, which easily causes deformation of the outer ring of the bearing, especially for thin-section ball bearings. Due to the thin outer ring of the bearing, the outer ring of the bearing is prone to bulging and deformation after the high-rigidity bearing cover is installed, affecting the use of the bearing. In addition, due to the thin cross-section, the internal axial space is very small, and the traditional shield with a wide outer lip and a wide inner lip may interfere with the cage after being assembled to the outer ring of the bearing.

[0003] Therefore, it is desirable to provide a bearing cap and a bearing with stable sealing performance, which can reduce deformation of the bearing outer ring and reduce the risk of interference. Summary of the invention

[0004] The purpose of the present disclosure is to at least solve the shortcomings existing in the prior art, and a bearing cover is proposed, including an inner lip segment, which has a base segment parallel to the radial direction of the bearing cover; an outer lip segment, which includes an arc segment with an arc shape and a first segment and a second segment, one end of the second segment is adjacent to the arc segment and the other end is adjacent to the first segment; a connecting segment, which is located between the inner lip segment and the outer lip segment, and the two ends of the connecting segment are adjacent to the first segment and the base segment respectively. Wherein, the maximum width of the outer lip segment in the direction perpendicular to the plane where the base segment is located is between 1.09 mm and 1.21 mm.

[0005] According to some embodiments of the present disclosure, the bearing cap is a one-piece component.

[0006] According to some embodiments of the present disclosure, the radius of the arc segment is 1.9 to 2.1 times the plate thickness of the bearing cover.

[0007] According to some embodiments of the present disclosure, a minimum distance between the arc segment and the central axis of the bearing cap is smaller than a minimum distance between the first segment and the central axis of the bearing cap.

[0008] According to some embodiments of the present disclosure, the inner lip section of the bearing cover further includes a tail section extending from one end of the base section in a direction not parallel to the base section, and the tail section and the connecting section are located on the same side of the base section.

[0009] According to some embodiments of the present disclosure, the base segment of the inner lip segment and the connecting segment have an included angle between 120° and 140°.

[0010] According to some embodiments of the present disclosure, a maximum width of the inner lip segment in a direction perpendicular to the plane where the base segment is located is 2.4 to 2.6 times the plate thickness of the bearing cap.

[0011] According to some embodiments of the present disclosure, the outer lip section of the bearing cover includes a plurality of open grooves in at least a portion of the arc section and at least a portion of the second section, the number of the open grooves is an odd number, and the minimum distance between two adjacent open grooves among the plurality of open grooves is in the range of 5-17 mm.

[0012] According to some embodiments of the present disclosure, the number of open slots is equal to π*D o / 9 in millimeters to the nearest odd integer, where D o is the outer diameter of the bearing cap.

[0013] According to some embodiments of the present disclosure, the plate thickness of the bearing cap is in the range of 0.18 mm to 0.22 mm.

[0014] The present disclosure also proposes a bearing, comprising a bearing body and a bearing cover, wherein the bearing cover cooperates with the bearing body so that a bearing cavity is formed between the bearing cover and the bearing body, and the bearing body comprises a bearing inner ring and a bearing outer ring located radially outside the bearing inner ring. The bearing outer ring comprises: a blocking portion located at the end face of the bearing outer ring and extending radially inward, a sealing groove adjacent to the blocking portion, located axially inside the blocking portion and opening radially inward, and a stopper adjacent to the sealing groove, located on a side of the sealing groove opposite to the blocking portion, wherein the minimum diameter of the stopper is smaller than the minimum diameter of the blocking portion.

[0015] Wherein, the inner diameter of the bearing inner ring is less than or equal to 65 mm, and the bearing cover is an integrated component with a plate thickness ranging from 0.18 mm to 0.22 mm.

[0016] The bearing cover and the bearing body are assembled so that the inner lip section cooperates with the bearing inner ring of the bearing body, and the outer lip section of the bearing cover is squeezed and deformed to be accommodated in the sealing groove of the bearing outer ring.

[0017] According to some embodiments of the present disclosure, the bearing cover includes a plurality of open grooves in at least a portion of the arc segment and at least a portion of the second segment, the number of the open grooves is an odd number, and the distance between the central axes of two adjacent open grooves in the plurality of open grooves is in the range of 5-17 mm.

[0018] According to some embodiments of the present disclosure, the bearing satisfies

[0019]

[0020] Among them, D o is the outer diameter of the bearing outer ring, d i is the inner diameter of the bearing inner ring, A is a proportionality coefficient and is in the range of 0.4 to 0.62. According to some embodiments of the present disclosure, A is 0.45.

[0021] The present disclosure also proposes a bearing assembly method, wherein the bearing comprises a bearing body and a bearing cover, wherein the bearing body comprises a bearing inner ring and a bearing outer ring located radially outside the bearing inner ring, the bearing outer ring comprises: a blocking portion located at the end face of the bearing outer ring and extending radially inward; a sealing groove adjacent to the blocking portion, located axially inside the blocking portion and opening toward the radially inward direction; and a stop portion adjacent to the sealing groove, located on the side of the sealing groove opposite to the blocking portion, the minimum diameter of the stop portion being smaller than the minimum diameter of the blocking portion, the bearing cover comprises: an inner lip segment having a base segment; an outer lip segment, the outer lip segment comprising an arc segment having an arc shape and a first segment and a second segment, one end of the second segment being adjacent to the arc segment and the other end is adjacent to the first section; a connecting section is located between the inner lip section and the outer lip section, and the two ends of the connecting section are adjacent to the first section and the base section respectively; the assembly method comprises: pushing the bearing cover into the hole defined by the blocking portion in the axial direction until the first section of the bearing cover abuts against the stop portion of the bearing outer ring in the axial direction, wherein the ratio of the width of the sealing groove to the axial width of the undeformed outer lip section is in the range of 0.4-0.65; applying axial inward pressure to the bearing cover to deform the outer lip section, wherein the width of the deformed outer lip section in the axial direction is reduced to be accommodated in the sealing groove of the bearing outer ring, and the maximum outer diameter in the radial direction is enlarged to be press-fit with the bearing outer ring.

[0022] According to some embodiments of the present disclosure, a ratio of the width of the sealing groove to the width of the undeformed outer lip segment in the axial direction is between 0.5 and 0.6.

[0023] According to some embodiments of the present disclosure, the undeformed outer lip segment is transitionally matched with the blocking portion of the bearing outer ring.

[0024] The present disclosure also provides a bearing assembled according to the assembly method described in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1A schematic cross-sectional view showing the structure of a bearing cap according to an embodiment of the present disclosure;

[0026] Figure 2 Show Figure 1 A cross-sectional schematic diagram of a bearing cover after being matched with a bearing body, wherein an outer lip section of the bearing cover is accommodated in a sealing groove;

[0027] Figure 3 A cross-sectional schematic diagram showing a bearing cap according to an embodiment of the present disclosure being pushed into a hole defined by a blocking portion, wherein an outer lip section of the bearing cap is not accommodated in a sealing groove;

[0028] Figure 4 A partial cross-sectional schematic diagram showing a bearing cap according to another embodiment of the present disclosure being pushed into a hole defined by a blocking portion, wherein an outer lip section of the bearing cap is not accommodated in a sealing groove;

[0029] Figure 5 A schematic diagram showing a portion of a bearing cap according to an embodiment of the present disclosure;

[0030] Figure 6 A flow chart showing a method for assembling a bearing according to an embodiment of the present disclosure is shown.

[0031] Reference numerals

[0032] 1 bearing cover, 11 inner lip section, 110 base section, 111 tail section, 12 connecting section, 13 outer lip section, 131 first section, 132 second section, 133 arc section, 14 opening groove

[0033] 2 bearing body, 21 bearing outer ring, 211 blocking portion, 212 sealing groove, 213 stopper portion, 214 protruding corner portion, 22 bearing inner ring, 23 bearing cavity, 24 rolling element, 25 rolling element retainer R radially outward direction

[0034] W1 Maximum width of the outer lip segment in the axial direction

[0035] W2 Maximum width of the inner lip segment in the axial direction

[0036] W3 Width of sealing groove

[0037] L The distance between the central axes of two adjacent opening slots DETAILED DESCRIPTION

[0038] In order to make the purpose, scheme and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0039] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. In addition, "inner diameter" and "outer diameter" in this technical field and in the present disclosure should be understood as the inner diameter and outer diameter of the component.

[0040] In this disclosure, Figure 1-Figure 4 The schematic diagrams are all cross-sectional diagrams, without directly showing the annular shape or three-dimensional structure, but combined with Figure 5 The ring shown can be imagined that one side portion of the cross section taken on a surface of the corresponding bearing passing through the central axis of the bearing can be as shown in the corresponding schematic diagram Figure 1-4 shown.

[0041] For ease of description, in the present disclosure, since the bearing body and the bearing cap are both annular components, “radial” or “radial direction” is designated as the direction of the radius of the annular bearing body and the bearing cap, wherein radial inward is designated as pointing to the center of the annular circle, and radial inward is designated as pointing to the center of the annular circle. Figure 1 The direction indicated by the arrow R is opposite, and radially outward is designated as away from the center of the ring, such as Figure 1 As shown by the arrow R in the middle. Furthermore, the "axial direction" or "axial direction" refers to the direction of the rotation axis of the bearing body, which is perpendicular to the radial outward direction R. The axial outward direction refers to the direction from the inside of the bearing toward the outside of the bearing, and the axial inward direction refers to the direction from the outside of the bearing toward the inside of the bearing. And it can be imagined that since the bearing cover 1 and the bearing body 2 are both rotating bodies, at any point in the bearing cover 1 and the bearing body 2, a circle passing through the point can be intercepted on the bearing cover 1 and the bearing body 2 by a plane perpendicular to the rotation axis. The larger the diameter of the circle passing through the point, that is, the greater the distance between the point and the rotation axis, the closer the point is to the outside in the radial outward direction, that is, the farther along the direction indicated by the arrow R ( Figure 2 The center is further to the right).

[0042] Combination Figure 1 and Figure 2 The basic structure and assembly relationship between the bearing cap 1 and the bearing body 2 will be understood. Figure 1 As shown, the bearing cap 1 according to the present disclosure may include an inner lip segment 11, an outer lip segment 13 and a connecting segment 12. Figure 2As shown, the bearing body includes a bearing outer ring 21 and a bearing inner ring 22, wherein the bearing outer ring 21 is press-fitted with the outer lip segment 13, and the bearing inner ring 22 is gap-fitted with the inner lip segment 11 to form an incompletely sealed bearing cavity 212, and the bearing cavity 212 is narrow enough through the gap between the bearing inner ring 22 and the inner lip segment 11, so that the relative movement of the bearing inner ring 22 and the inner lip segment 14 is not interfered by the friction between the two, and at the same time, external pollutants or other factors can be prevented from interfering with the inside of the bearing cavity to a large extent. According to the bearing disclosed in the present invention, there is a bearing cover 1 on at least one side of the bearing, and preferably there is a bearing cover 1 on both sides of the bearing. There are rolling bodies 24 and rolling body retainers 25 in the bearing cavity 212 to realize the basic rotation function of the bearing.

[0043] According to some embodiments of the bearings disclosed herein, the bearing outer ring 21 also includes a blocking portion 211, which can be arranged at two outer end surfaces of the bearing outer ring 21 away from the bearing cavity 23. When the outer lip 13 is accommodated in the sealing groove 212, the blocking portion 211 can abut against at least part of the outer lip 13 to limit the bearing cover 1, so as to reduce the possibility of relative movement of the bearing cover 1 away from the bearing cavity 23, causing the bearing cover 1 to be accidentally detached.

[0044] In some embodiments, the bearing outer ring 21 may further include a sealing groove 212, which is a groove whose opening direction is opposite to the radial outward direction R, and may be adjacent to the blocking portion 211 and located on the side of the blocking portion 211 close to the bearing cavity 23. The sealing groove 212 is used to accommodate a portion of the outer lip segment 13 of the bearing cover 1. The sealing performance of the bearing cover is greatly increased through the press fit between the sealing groove 212 and the outer lip segment 13.

[0045] A stopper 213 is provided on the side of the sealing groove 212 close to the bearing cavity 23, that is, on the side of the sealing groove 212 opposite to the blocking portion, and the minimum diameter of the stopper 213 is smaller than the minimum diameter of the blocking portion 211. The stopper 213 can abut against at least part of the bearing cover 1 to limit the bearing cover 1, thereby reducing the possibility of the bearing cover 1 moving relative to the bearing cavity 23, thereby interfering with the rolling element 24 and the rolling element retainer 25 in the bearing cavity 23.

[0046] Generally speaking, the full metal bearing cap 1 has a relatively high rigidity, and the bearing cap 1 is installed in the bearing body 2 by pressing. Since the width W1 of the outer lip section 13 of the bearing cap 1 in the axial direction is larger than the width of the sealing groove 212, the outer lip section 13 must be deformed to a large extent so that the outer lip section 13 can be accommodated in the sealing groove 212. This results in a large pressure in the radial outward direction R on the outer ring of the bearing when the bearing cap 1 is pressed and assembled, thereby causing a large deformation of the outer ring of the bearing, especially for thin-section type bearings, which may make the bearing unusable.

[0047] According to the above technical solution disclosed in the present invention, the structure of the outer lip segment is improved on the basis of the traditional bearing cover, which can reduce the possibility of large deformation of the bearing outer ring, thereby making the bearing unusable.

[0048] According to some embodiments of the present disclosure, the bearing satisfies the following relationship:

[0049]

[0050] Among them, D o is the outer diameter of the bearing outer ring 21, d i is the inner diameter of the bearing inner ring 22, A is the proportionality coefficient and is in the range of 0.4 to 0.62, preferably, A is 0.45. The bearing outer ring 21 of this type of bearing is more prone to deformation, and therefore is more suitable for the bearing cap 1 according to the embodiment of the present disclosure.

[0051] According to the bearing disclosed in the present invention, the outer lip section 13 includes a first section 131, a second section 132 and an arc section 133, wherein the first section 131 is connected to the connecting section 12, the arc section 133 is located at the free end of the outer lip section 13, and the second section 132 is located between the first section 131 and the arc section 133. The first section 131 can extend at a certain angle relative to the radial direction of the bearing cover 1, and the first section 131 and the second section 132 have a smooth transition, which is conducive to preventing the outer lip 13 from being directly bent into two sections with a sharp angle when being press-fitted, thereby having a greater impact on the outer ring of the bearing. The second section 132 is roughly perpendicular to the radial direction of the bearing cover 1, so as to provide a partial width for the outer lip section 13 in the axial direction of the bearing cover 1.

[0052] like Figure 1 As shown, the maximum width W1 of the outer lip segment 13 in the axial direction of the bearing cover 1 can be between 1.09 mm and 1.21 mm, which is a smaller range than that of the prior art, but is still larger than the width of the sealing groove. When the outer lip segment 13 is assembled, the deformation of the outer lip segment 13 caused by being accommodated in the bearing outer ring sealing groove 212 is reduced, further reducing the pressure between the bearing cover 1 and the bearing body, which is beneficial to reducing the deformation of the bearing outer ring of the bearing body.

[0053] According to some embodiments of the present disclosure, the bearing cap 1 should be selected according to the width of the sealing groove 212 of the bearing body 2, and in particular, the original axial width of the outer lip section 13 of the bearing cap 1 before being matched (i.e., the width of the undeformed outer lip section 13) is closely related to the width W3 of the sealing groove 212. The width W3 of the sealing groove 212 is as follows: Figure 3 and Figure 4 shown. Figure 3FIG. 2 shows a schematic diagram of a sealing groove 212 according to some embodiments of the present disclosure, wherein the width W3 of the sealing groove 212 is defined as the chord length of the arc cross-section of the sealing groove between the blocking portion 211 and the stopper portion 213. Figure 3 In the embodiment shown, it is shown that: the straight line ( Figure 3 The minimum value of the distance between the intersection of the straight line (the dashed line shown in FIG. 1 ) and the stopper 213 and the intersection of the straight line and the blocking portion 211 is known to those skilled in the art. In some embodiments, in order to reduce the possibility that the protruding corner portion 214 at the adjacent junction of the blocking portion 211 and the sealing groove 212 will damage the bearing cap 1 when assembled with the bearing cap 1 or cause other adverse effects during use, the protruding corner portion 214 will be rounded or chamfered, such as Figure 4 As shown. Those skilled in the art can also understand that rounding or chamfering should not affect the definition of the width W3 of the sealing groove 212. The width W3 of the sealing groove 212 can be expressed as the chord length of the arc cross-section of the sealing groove between the blocking portion 211 and the stopper portion 213 before chamfering or rounding. Figure 4 In the illustrated embodiment, the straight line ( Figure 4 The intersection of the straight line (the dashed line shown in FIG. 2 ) and the stopper 213 and the complete arc segment corresponding to the straight line and the sealing groove 212 (i.e., the arc segment corresponding to the arc segment before being rounded, Figure 4 The minimum value of the distance between the intersection points of the two axes (the missing parts are shown by dotted lines).

[0054] In some embodiments, a suitable bearing cap 1 can be selected so that the ratio of the width W3 of the sealing groove 212 to the maximum width W1 of the bearing cap 1 in the axial direction can be in the range of 0.40 to 0.65, preferably in the range of 0.5 to 0.6, and more preferably, the ratio is 0.55. The above ratio range or ratio is conducive to strengthening the matching effect between the outer lip section 13 of the bearing cap 1 and the sealing groove 212 after being squeezed and deformed, which not only ensures the matching strength, but also prevents the outer ring 21 of the bearing from being deformed by excessive matching pressure and causing bulging deformation, thereby preventing normal use.

[0055] In some embodiments, a bearing cap 1 with an increased maximum outer diameter of the outer lip segment 13 may be selected so that the minimum diameter thereof and the blocking portion 211 change from a clearance fit to a transition fit. The clearance fit and transition fit described here are explained by way of example, and both refer to the fit between the outer lip segment 13 and the blocking portion 211 when the bearing cap 1 is inserted into the opening defined by the blocking portion 211 (i.e., when the bearing cap 1 is engaged with the blocking portion) and the bearing cap 1 has not yet been pressed to produce a deformation with a larger radial dimension. Transition fit means that the maximum outer diameter of the outer lip segment 13 may be greater than the minimum diameter of the blocking portion 211; clearance fit means that the maximum outer diameter of the outer lip segment 13 is less than the minimum diameter of the blocking portion 211. In the prior art, the width of the outer lip is relatively large, and the size between the maximum outer diameter of the outer lip segment 13 and the minimum diameter of the blocking portion 211 is usually set so that the two are clearance-fitted to reserve a larger deformation space; and according to some embodiments of the bearing cover disclosed herein, the width W1 of the outer lip is reduced, and the reserved deformation space is also reduced accordingly, so that it can be installed with a transition fit, which not only ensures that the bearing cover 1 and the outer ring of the bearing are tightly fitted, but also greatly reduces or even avoids the problem of deformation of the outer ring of the bearing.

[0056] According to some embodiments of the present disclosure, the maximum outer diameter of the outer lip segment 13 may be greater than or equal to the minimum diameter of the blocking portion 211 to further ensure a tight fit between the bearing cover 1 and the bearing outer ring 21 .

[0057] The bearing cover 1 can be formed integrally by a plate material, for example, made of a metal plate material. According to some embodiments of the present disclosure, the inner diameter of the bearing inner ring 22 is less than or equal to 65 mm, and the thickness of the plate material is in the range of 0.18 mm-0.22 mm, preferably 0.2 mm. In this article, the thickness of the plate material used to make the bearing cover is referred to as the plate thickness, and the range of the above plate thickness is smaller than that of the prior art. When the bearing cover 1 is squeezed and deformed, the deformation of the outer lip segment 13 is different from that of the prior art. The outer lip segment 13 will be easier to deform, and the press-fit force generated between the bearing cover 1 and the bearing outer ring 21 due to the deformation will not be locally too large, so that the bearing outer ring 21 is deformed to affect its use.

[0058] According to some embodiments of the present disclosure, the arc segment 133 has an arc shape, and the arrangement of the arc segment 133 further facilitates the curling deformation of the outer lip segment 13 when the bearing cover 1 is press-fitted, for example Figure 2 As shown in , the curling deformation is conducive to evenly distributing the pressure between the bearing cover 1 and the outer ring of the bearing, and reducing the possibility of severe deformation of the outer ring of the bearing due to excessive local pressure. According to some embodiments of the present disclosure, the radius of the arc segment 133 is 1.9 to 2.1 times the plate thickness, preferably twice the plate thickness. The plate thickness in this article refers to the thickness of the plate forming the bearing cover 1. For example, when the plate thickness is 0.2 mm, the radius of the arc segment can be between 0.38 mm and 0.42 mm, preferably 0.4 mm.

[0059] In addition, the end of the arc segment 133 may extend no further than the junction of the connecting segment 12 and the outer lip segment 13, that is, the minimum distance between the arc segment 133 and the central axis of the bearing cover is smaller than the minimum distance between the first segment 131 and the central axis of the bearing cover, so as to prevent the outer lip segment 13 from being too long, causing the outer lip segment 13 to interfere with the connecting segment 12 after the bearing cover 1 is deformed by fitting.

[0060] In addition, according to some embodiments of the present disclosure, the bearing cover further has the following advantages and improvements.

[0061] According to some embodiments of the present disclosure, the bearing cover can be integrally formed from a metal sheet, and the thickness of the sheet is preferably in the range of 0.18-0.22 mm, wherein the sheet is more preferably 0.2 mm thick, so as to reduce the thickness of the base section 110 of the inner lip section 11 of the bearing cover, thereby facilitating the formation of a larger bearing cavity and reducing the risk of interference with rolling elements and / or rolling element retainers.

[0062] According to some embodiments of the present disclosure, the inner lip segment 11 of the bearing cap may include a base segment 110 and a tail segment 111, wherein the base segment 110 extends parallel to the radial direction of the inner lip segment 11, and the tail segment 111 extends perpendicular to the base segment 110. Figure 2 It can be seen that the tail section 111 extends toward the bearing cavity 23, and the provision of the tail section 111 greatly increases the sealing performance of the bearing cover. In some embodiments, the maximum thickness of the inner lip section 11 in the axial direction of the bearing cover 1 (i.e., at the tail section 111) may be between 2.4 and 2.6 times the plate thickness, preferably 2.5 times the plate thickness, where the plate thickness in this article refers to the thickness of the plate material forming the bearing cover 1. In some embodiments, for example, when the plate thickness is 0.2 mm, the maximum width W2 of the inner lip section 11 in the axial direction of the bearing cover 1 may be between 0.48 mm and 0.52 mm, preferably 0.5 mm. The maximum width W2 of the inner lip section 11 in the axial direction is reduced compared to the prior art, which is conducive to forming a larger bearing cavity and reducing the risk of interference with rolling elements and / or rolling element retainers.

[0063] There is a connecting section 12 between the outer lip section 13 and the inner lip section 11, and the connecting section 12 is inclined at an angle relative to the base section 110 of the inner lip section 11, and the angle can be between 120° and 140°. Figure 1 As shown, the connecting section 12 extends from the inner lip section 11 toward the side where the tail section 111 is located. Figure 2 As shown, after the bearing cover 1 is assembled with the bearing body 2 , the inner lip section 11 is further away from the bearing cavity 23 than the outer lip portion in the sealing groove 212 , so as to form a larger bearing cavity 23 and reduce the possibility of interference.

[0064] Also, see Figure 1-5The bearing cover 1 may also include a plurality of evenly distributed opening grooves 14 ( Figure 5 Only a part of the ring is shown, and two open grooves are shown), and the number of open grooves 14 is an odd number. The multiple open grooves 14 are used to release stress when the bearing cover is assembled, so that the bearing cover 1 is easy to assemble. When the number of open grooves 14 is an even number, the pairs of open grooves 14 are located at both ends of the diameter of the ring and face each other, which makes it easy to concentrate stress at the diameter of any pair of facing open grooves 14 when the bearing cover is squeezed, and then fracture occurs, while the odd number of open grooves 14 can reduce the possibility of this situation.

[0065] According to some embodiments of the present disclosure, the number of the opening slots 14 is determined according to the outer diameter of the bearing cap, for example, it can be equal to π*D o / 9 is calculated in millimeters and rounded to the nearest odd number, where D o is the outer diameter of the bearing cap 1. For example, for a bearing cap with D0 = 50 mm, π*D o / 9=17.45, so the number of the open slots 14 is 17.

[0066] According to some embodiments of the present disclosure, the number of open slots is determined according to the distance between the open slots 14 and the outer diameter of the bearing cap. Specifically, the distance L between the central axes of two adjacent open slots 14 among the plurality of open slots 14 is in the range of 5-17 mm, and in combination with the outer diameter of the bearing cap 1, a suitable distance L can be selected to further determine the number of open slots 14. This arrangement ensures that the distance between adjacent open slots 14 will not be too large or too small due to the influence of the outer diameter of the bearing cap, and further ensures that the plurality of open slots 14 are used to release stress when the bearing cap is assembled, so that the bearing cap 1 is easy to assemble.

[0067] According to some embodiments of the present disclosure, a bearing assembly method is also provided, such as Figure 6 In some embodiments, the assembly method can be used to assemble the above reference Figure 1-5 The bearing of the embodiment shown. In step S1, the bearing cover 1 is pushed into the hole defined by the blocking portion 211 in the axial direction until the first section 131 of the bearing cover 1 abuts against the stopper 213 of the bearing outer ring in the axial direction. In step S2, pressure is applied to the bearing cover 1 in the axial direction toward the bearing cavity 23, so that the outer lip section 13 is deformed, and the width W1 of the deformed outer lip section 13 in the axial direction is reduced to be accommodated in the sealing groove 212 of the bearing outer ring, and the maximum outer diameter in the radial direction is enlarged to be press-fitted with the bearing outer ring 21. The assembly method is simple and fast, and is compatible with the structure of the bearing according to the present disclosure. At the same time, it can ensure good sealing performance between the bearing cover and the bearing body without causing large deformation of the bearing body.

[0068] It should be understood that the above description is intended to illustrate rather than limit. For example, the above embodiments (and / or aspects thereof) can be used in combination with each other. In addition, without departing from the scope of the present disclosure, many modifications can be made to adapt specific situations or materials to the teachings of the present disclosure. The functions or performances of the various elements or modules described herein are only for illustration and are by no means restrictive, but are merely exemplary embodiments. After reading the above description, many other embodiments and modifications within the spirit and scope of the claims will be apparent to those skilled in the art. Therefore, the scope of the present disclosure should be determined with reference to the full scope of the equivalents given by the attached claims and these claims.

[0069] In the following claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

Claims

1. A bearing cap, comprising an inner lip segment having a base segment parallel to a radial direction of the bearing cap; An outer lip segment, the outer lip segment comprising an arc segment having an arc shape, a first segment and a second segment, one end of the second segment being adjacent to the arc segment and the other end of the second segment being adjacent to the first segment; A connecting section, located between the inner lip section and the outer lip section, with two ends of the connecting section adjacent to the first section and the base section respectively; Wherein, the maximum width of the outer lip segment in a direction perpendicular to the plane where the base segment is located is between 1.09 mm and 1.21 mm.

2. The bearing cap according to claim 1, wherein: The bearing cover is an integral component.

3. The bearing cap according to claim 1, wherein: The radius of the arc segment is 1.9 to 2.1 times the plate thickness of the bearing cover.

4. The bearing cap according to claim 1, wherein: The minimum distance between the arc segment and the central axis of the bearing cover is smaller than the minimum distance between the first segment and the central axis of the bearing cover.

5. The bearing cap according to claim 1, wherein: The inner lip section of the bearing cover further includes a tail section extending from one end of the base section in a direction not parallel to the base section, and the tail section and the connecting section are located on the same side of the base section.

6. The bearing cap according to claim 1, wherein: The base section of the inner lip section and the connecting section have an included angle between 120° and 140°.

7. The bearing cap according to claim 1, wherein: The maximum width of the inner lip section in a direction perpendicular to the plane where the base section is located is 2.4 to 2.6 times the plate thickness of the bearing cover.

8. The bearing cap according to claim 1, wherein: The outer lip section of the bearing cover includes a plurality of open grooves in at least a portion of the arc section and at least a portion of the second section, the number of the open grooves is an odd number, and the minimum distance between two adjacent open grooves in the plurality of open grooves is in the range of 5-17 mm.

9. The bearing cap according to claim 8, wherein: The number of open slots is equal to π*D o / 9 in millimeters to the nearest odd integer, where D o is the outer diameter of the bearing cap.

10. A bearing cap according to any one of the preceding claims, wherein: The plate thickness of the bearing cap is in the range of 0.18 mm to 0.22 mm.

11. A bearing, comprising a bearing body and a bearing cap, wherein: The bearing cap cooperates with the bearing body so that a bearing cavity is formed between the bearing cap and the bearing body. The bearing body comprises a bearing inner ring and a bearing outer ring located radially outward of the bearing inner ring, and the bearing outer ring comprises: The blocking portion is located at the end face of the bearing outer ring and extends radially inward. a sealing groove adjacent to the blocking portion, located axially inside the blocking portion and opening toward the radially inward direction, and a stopper portion, adjacent to the sealing groove and located on a side of the sealing groove opposite to the blocking portion, wherein the minimum diameter of the stopper portion is smaller than the minimum diameter of the blocking portion, The inner diameter of the bearing inner ring is less than or equal to 65 mm, and the bearing cover is an integrated component with a thickness ranging from 0.18 mm to 0.22 mm. The bearing cover and the bearing body are assembled so that the inner lip section cooperates with the bearing inner ring of the bearing body, and the outer lip section of the bearing cover is squeezed and deformed to be accommodated in the sealing groove of the bearing outer ring.

12. The bearing according to claim 11, wherein the bearing cover comprises a plurality of open grooves in at least a portion of the arc segment and at least a portion of the second segment, the number of the open grooves is an odd number, and the minimum distance between two adjacent open grooves in the plurality of open grooves is in the range of 5-17 mm.

13. The bearing according to claim 11, wherein the bearing satisfies in, D o is the outer diameter of the bearing outer ring, d i is the inner diameter of the bearing inner ring, A is a proportionality coefficient and is in the range of 0.4 to 0.

62.

14. A method for assembling a bearing, the bearing comprising a bearing body and a bearing cover, wherein: The bearing body comprises a bearing inner ring and a bearing outer ring located radially outward of the bearing inner ring, and the bearing outer ring comprises: The blocking portion is located at the end face of the bearing outer ring and extends radially inward. a sealing groove adjacent to the blocking portion, located axially inside the blocking portion and opening toward the radially inward direction, and a stopper portion, adjacent to the sealing groove and located on a side of the sealing groove opposite to the blocking portion, wherein the minimum diameter of the stopper portion is smaller than the minimum diameter of the blocking portion, The bearing cap comprises: inner lip segment, with base segment; An outer lip segment, the outer lip segment comprising an arc segment having an arc shape, a first segment and a second segment, one end of the second segment being adjacent to the arc segment and the other end of the second segment being adjacent to the first segment; A connecting section, located between the inner lip section and the outer lip section, with two ends of the connecting section adjacent to the first section and the base section respectively; The assembly method comprises: Pushing the bearing cap into the hole defined by the blocking portion in the axial direction until the first section of the bearing cap abuts against the stopper of the bearing outer ring in the axial direction, wherein a ratio of a width of the sealing groove to an axial width of the undeformed outer lip section is in a range of 0.4-0.65; Axial inward pressure is applied to the bearing cover to deform the outer lip segment. The width of the deformed outer lip segment in the axial direction is reduced to be accommodated in the sealing groove of the bearing outer ring, and the maximum outer diameter in the radial direction is increased to be press-fitted with the bearing outer ring.

15. The assembly method according to claim 14, wherein: The ratio of the width of the sealing groove to the width of the undeformed outer lip segment in the axial direction is between 0.5 and 0.

6.

16. The assembly method according to claim 15, wherein: The undeformed outer lip section is transitionally matched with the blocking portion of the bearing outer ring.

17. A bearing assembled according to the assembly method according to any one of claims 14 to 16.

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