Bearing cap and bearing comprising bearing cap

Abstract

The invention provides a bearing cover which is provided with a rotating body structure and comprises an inner lip section, an outer lip section and a connecting section. The bearing cap further comprises an inner core section, the inner core section comprises a base section, a bent section and a second bent section, the base section is provided with a plate shape which extends in parallel with the radial direction of the bearing cap and is uniform in thickness in the axial direction of the bearing cap, and the second bent section is provided with a first bent section and a second bent section. The part, adjacent to the connecting section, of the outer lip section and the connecting section have a thickness difference on the side, close to the bent section, of the connecting section in the axial direction, the thickness difference ranges from w + 0.05 mm to 1.5 * w + 0.2 mm, and w is the thickness of the base section in the axial direction. The invention further provides a bearing comprising the bearing cover. The thickness of the base section in the axial direction ranges from 0.3 time to 0.35 time of the width of a sealing groove of the bearing.

Description

Technical Field

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

[0002] Bearings have been widely used in more and more fields, and the market has higher and higher requirements for bearings. For example, more and more bearings are required to be equipped with bearing caps to avoid interference from external contaminants and leakage of lubricants. Metal bearing caps are installed between the inner ring and the outer ring of the bearing by press fitting, which can easily cause deformation of the outer ring of the bearing, especially for thin-section ball bearings. Since the outer ring of the bearing is thin, the outer ring of the bearing is prone to bulging and deformation after the high-rigidity bearing cap is installed, which affects the use of the bearing. Therefore, it is suitable for non-all-metal bearing caps, such as RZ bearing caps.

[0003] However, due to the thin cross-section and very small internal axial space, the conventional RZ bearing cap has a larger lip and a wider inner lip, which may interfere with the cage after being assembled to the bearing outer ring.

[0004] Therefore, it is desired to provide a new bearing with stable sealing performance and reduced interference risk. Summary of the invention

[0005] The purpose of the present disclosure is to at least solve the shortcomings existing in the prior art, and a bearing cover (1) is proposed, comprising an inner lip section (14) located on the radial inner side of the bearing cover (1); an outer lip section (12) located on the radial outer side of the bearing cover (1); and a connecting section (13) having a plate-like structure, connecting the outer lip section (12) and the inner lip section (14) and parallel to the radial direction of the bearing cover (1).

[0006] The bearing cover (1) further comprises an inner core section (11), wherein the inner core section (11) comprises: a base section (111) having a plate-like structure, parallel to the radial direction of the bearing cover (1); and a bending section (112), located radially outside the base section (111) and extending from the base section (111) at an angle to the base section (111). The base section (111) is located at the connecting section (13) and constitutes a part of the connecting section (13), the bending section (112) is located at the outer lip section (12) and constitutes a part of the outer lip section (12), and the elastic modulus of the material of the remaining sections of the bearing cover (1) except the inner core section (11) is smaller than the elastic modulus of the material of the inner core section (11).

[0007] A portion of the outer lip section (12) adjacent to the connecting section (13) has a thickness difference (s1) with the connecting section (13) in the axial direction on a side of the connecting section (13) close to the bending section (112), and the thickness difference (s1) is in the range of w+0.05mm to 1.5*w+0.2mm, wherein w is the thickness (s4) of the base section (111) in the axial direction of the bearing cover (1).

[0008] According to some embodiments of the present disclosure, the thickness (s4) of the base segment (111) in the axial direction is in the range of 0.2 mm to 1.5 mm.

[0009] According to some embodiments of the present disclosure, the inner core segment (11) also includes a second bending segment (113) that is not parallel to the axial direction, and the second bending segment (113) is located radially outside the bending segment (112) and extends from the bending segment (112) in a direction away from the base segment (111); in some embodiments, the second bending segment (113) is roughly parallel to the radial direction.

[0010] According to some embodiments of the present disclosure, the length (s5) of the second bending segment (113) is greater than or equal to 0.2 mm.

[0011] According to some embodiments of the present disclosure, the bending segment (112) is substantially parallel to the axial direction.

[0012] According to some embodiments of the present disclosure, a maximum thickness (s3) of the inner lip segment (14) in the axial direction of the bearing cover (1) is between 0.8 mm and 1.8 mm.

[0013] According to some embodiments of the present disclosure, a groove is provided on the radially inner side of the inner lip segment (14), and the maximum width (s12) of the groove is between 0.4 mm and 1.0 mm.

[0014] According to some embodiments of the present disclosure, the length (s7) of the inner core segment (11) in the radial direction is between 0.5 and 0.9 times the length (s10) of the bearing cover (1) in the radial direction.

[0015] According to some embodiments of the present disclosure, the minimum axial distance (s13) from the bending section (112) to the plane where the first end face of the outer lip section (12) is located is greater than 0.05 mm, and the minimum axial distance (s14) from the bending section (112) to the plane where the second end face of the outer lip section (12) is located is greater than 0.05 mm, and the first end face and the second end face of the outer lip section (12) define the maximum width (s6) of the outer lip section (12) in the axial direction.

[0016] The present disclosure also proposes a bearing, comprising a bearing body (2) and at least one bearing cover (1) according to the present disclosure, wherein the bearing cover (1) cooperates with the bearing body (2) so that a bearing cavity (23) is formed between the bearing cover (1) and the bearing body (2), and the bearing body (2) comprises a bearing inner ring (22) and a bearing outer ring (21) located radially outside the bearing inner ring (22).

[0017] The bearing outer ring (21) comprises: a blocking portion (211) located at the end surface of the bearing outer ring (21) and extending inwardly in the radial direction; a sealing groove (212) adjacent to the blocking portion (211), located on the radial inner side of the blocking portion (211) and opening in the radial inner direction; and a stopper (213) adjacent to the sealing groove (212), located on the side of the sealing groove (212) opposite to the blocking portion (211), wherein the minimum diameter of the stopper (213) is smaller than the minimum diameter of the blocking portion (211).

[0018] The bearing cover (1) and the bearing body (2) are assembled so that the inner lip section (14) cooperates with the bearing inner ring (22) of the bearing body (2), and the outer lip section (12) of the bearing cover (1) is deformed to be accommodated in the sealing groove (212) of the bearing outer ring (21).

[0019] The thickness (s4) of the base section (111) in the axial direction is between 0.3 times and 0.35 times the width (a) of the sealing groove (212).

[0020] According to some embodiments of the present disclosure, the maximum outer diameter (s11) of the inner core segment (11) is larger than the minimum inner diameter (d) of the stopper (213).

[0021] According to some embodiments of the present disclosure, the maximum outer diameter (s11) of the inner core segment (11) is between 0.7 mm and 1.5 mm smaller than the minimum inner diameter (b) of the blocking portion (211).

[0022] According to some embodiments of the present disclosure, the maximum thickness (s6) of the outer lip segment (12) in the axial direction is between 0.05 mm and 0.25 mm smaller than the axial depth (c) of the sealing groove (212).

[0023] According to some embodiments of the present disclosure, the outer lip segment (12) includes a curved free end (121), and the maximum thickness (s9) of the free end (121) in the axial direction is between n-0.05mm and n+0.2mm, where n is the width (a) of the sealing groove (212).

[0024] According to some embodiments of the present disclosure, the inner lip section (14) of the bearing cover (1) is clearance-fitted with the bearing inner ring (22). BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 2 A cross-sectional schematic diagram of a bearing cap marked with a reference number according to an embodiment of the present disclosure is shown;

[0027] Figure 3 Show Figure 1 A schematic diagram of the matching relationship between the bearing cover and the bearing body, wherein the outer lip section of the bearing cover is accommodated in the sealing groove and the interference between the outer lip section and the sealing groove is shown;

[0028] Figure 4 Show Figure 3 A partial enlarged view of the sealing groove of the bearing body;

[0029] Figure 5 A partially enlarged view of a sealing groove according to another embodiment of the present disclosure is shown.

[0030] Reference numerals

[0031] 1 bearing cap, 11 inner core section, 111 base section, 112 bending section, 113 second bending section, 12 outer lip section, 121 free end, 13 connecting section, 14 outer lip section, 141 groove,

[0032] 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 bearing end face, 25 rolling element, 25 rolling element retainer R radially outward direction

[0033] s1 is the thickness difference between the outer lip segment and the connecting segment,

[0034] s2 groove edge width,

[0035] s3 The maximum width of the inner lip segment in the axial direction,

[0036] s4 is the thickness of the base segment in the axial direction,

[0037] s5 is the length of the second bending section,

[0038] s6 Maximum thickness of the outer lip segment in the axial direction,

[0039] s7 the length of the inner core segment in the radial direction,

[0040] s8 is the length of the bending section in the axial direction,

[0041] s9 Maximum thickness of the free end in the axial direction,

[0042] s10 The length of the bearing cover in the radial direction,

[0043] s11 Maximum outer diameter of the inner core segment,

[0044] s12 groove width,

[0045] s13 The minimum axial distance from the bending section to the plane where the first end surface of the outer lip section is located,

[0046] s14 is the minimum axial distance from the bending section to the plane where the second end surface of the outer lip section is located,

[0047] aWidth of sealing groove

[0048] bMinimum inner diameter of the blocking part

[0049] c Axial depth of seal groove

[0050] d Minimum inner diameter of the stopper DETAILED DESCRIPTION

[0051] 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.

[0052] In the description of the present disclosure, it should be noted that, unless otherwise clearly stipulated 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 a connection between the insides of two elements. 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" should be understood as the inner diameter and outer diameter of the components in this technical field and in the present disclosure. In addition, in the present disclosure, approximately parallel means that the relative angle is within 180°±10°, and approximately perpendicular means that the relative angle is within 90°±5°. In the present disclosure, Figure 1-Figure 5 The schematic diagrams are all cross-sectional diagrams, and the annular shape or three-dimensional structure of the bearing or the bearing cap is not directly shown. However, it can be imagined that one side of the cross-sectional view taken on a surface passing through the central axis of the corresponding bearing can be as shown in the corresponding schematic diagram. Figure 1-5 shown.

[0053] 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 3 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 3 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, along the Figure 3 The farther the direction indicated by the arrow R is ( Figure 3 The center is further to the right).

[0054] Figure 1 A partial cross-sectional schematic diagram showing the structure of a bearing cap according to an embodiment of the present disclosure; Figure 3 Show Figure 1 A partial cross-sectional diagram of a bearing cover and a bearing body after being matched, wherein the outer lip section 12 of the bearing cover 1 is accommodated in the sealing groove 212, and in order to facilitate understanding that the press fit between the outer lip section 12 and the sealing groove 212 will cause deformation of the outer lip section 12, the interference between the two is shown, and the Figure 1 and Figure 3 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 outer lip segment 12, a connecting segment 13 and an inner lip segment 14. Figure 1 The two dashed lines divide the Figure 3 As 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 12, and the bearing inner ring 22 is gap-fitted with the inner lip segment 14 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 25 and rolling body retainers 26 in the bearing cavity 212 to realize the basic rotation function of the bearing.

[0055] According to the bearing disclosed in the present invention, the bearing outer ring 21 also includes a blocking portion 211, which can be arranged at two outer end surfaces on the axial outside of the bearing outer ring 21. When the outer lip segment 12 is accommodated in the sealing groove 212, the blocking portion 211 can abut against at least part of the outer lip segment 12 to limit the bearing cover 1 to prevent the bearing cover 1 from moving relative to the rolling body 25, thereby reducing the possibility of accidental detachment of the bearing cover 1.

[0056] In addition, the bearing outer ring 21 may further include a sealing groove 212, which is a groove with an opening orientation opposite to the radial outward direction R, and may be adjacent to the blocking portion 211 and located on the axial inner side of the blocking portion 211. The sealing groove 212 is used to accommodate a portion of the outer lip section 12 of the bearing cover 1, that is, when actually mated, Figure 3 The interference portion shown in FIG. 1 is deformed to be accommodated in the sealing groove 212 , and the sealing performance of the bearing cover is greatly improved through the press fit between the sealing groove 212 and the outer lip segment 12 .

[0057] A stopper 213 is provided on the axial inner side of the sealing groove 212, 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 to prevent the bearing cover 1 from moving relative to the rolling element 25, thereby reducing the possibility of interference between the bearing cover 1 and the rolling element 25 and the rolling element retainer 26 in the bearing cavity 23.

[0058] According to the technical solution disclosed in the present invention, the structure is improved on the basis of the traditional RZ bearing cover, which greatly reduces the risk of interference with the rolling elements 25 and the rolling element retainer 26 inside the bearing cavity 23.

[0059] According to the bearing disclosed herein, Figure 1 As shown, it includes an outer lip section 12, a connecting section 13 and an inner lip section 14. The three sections are Figure 1 The two dotted lines are used to illustrate the division, wherein the outer lip segment 12 is a radially outer segment of the bearing cover 1, the inner lip segment 14 is a radially inner segment of the bearing cover 1, and the connecting segment 13 is located between the outer lip segment 12 and the inner lip segment 14 and connects the two. At least part of the outer lip segment 12, the connecting segment 13 and the inner lip segment 14 is made of an elastomeric material, such as a rubber material, especially the radially outermost portion of the outer lip segment 12 (i.e., the portion in contact with the bearing outer ring 21) and the inner lip segment 12 (i.e., the portion in contact with the bearing inner ring 22), so as to reduce the possibility that the bearing body 2 is severely deformed due to excessive matching pressure between the two when the bearing cover 1 and the bearing body 2 are matched, thereby affecting the use.

[0060] However, if the bearing cap is made entirely of an elastomeric material, the strength of the bearing cap cannot be guaranteed. Therefore, the bearing cap 1 further includes an inner core section 11, which may include a base section 111 and a bending section 112. Figure 1 and Figure 2 As shown, the inner core segment 1 can be an integrally formed rigid component, for example, stamped from a sheet material such as a metal sheet, to enhance the strength of the bearing cap 1. The elastic modulus of the material made of the inner core segment 11 can be much greater than the elastic modulus of the elastomeric material made of the rest of the bearing cap 1.

[0061] See also Figure 1 and Figure 2 In some embodiments, the length s7 of the inner core segment 11 in the radial direction may be greater than or equal to half of the length s10 of the bearing cover in the radial direction, so that at least half of the length of the bearing cover 1 is strengthened. In addition, the length of the inner core segment 11 in the bearing cover 1 cannot be too long to affect the fit between the bearing cover 1 and the bearing body 2, so the length s7 of the inner core segment 11 in the radial direction may be less than or equal to 0.9 times the length s10 of the bearing cover in the radial direction.

[0062] The base segment 111 may have a plate shape extending parallel to the radial direction and having a uniform thickness in the axial direction, and the base segment 111 occupies most of the length of the inner core segment in the radial direction to enhance the strength of the bearing cap 1. The bent segment 112 extends from one end of the radial outer side of the base segment 111 and forms a certain angle with the base segment 111, which is substantially vertical in some embodiments and 90° in some embodiments to further enhance the strength of the bearing cap 1. The maximum width of the inner core segment 11 in the axial direction, that is, the maximum width s8 of the bent segment 112 in the axial direction may be between 2 and 2.5 times the thickness s4 in the axial direction.

[0063] In addition, according to the bearing cap of some embodiments of the present disclosure, a second bending section 113 may be provided on the inner core section 11, and the second bending section 113 may be located radially outside the bending section 112, and extend from the bending section 112 in a non-parallel manner to the axial direction and away from the base section 111; in some embodiments, the bending section 112 is substantially parallel to the radial direction; in some embodiments, the length s5 of the second bending section may be greater than 0.2 mm. The inner core section 11 has a "z"-shaped cross section, and the strength of the "z"-shaped structure is much greater than the "L"-shaped structure consisting only of the base section 111 and the bending section 112.

[0064] The inner core segment 11 is at least partially surrounded by the portion of the bearing cap 1 made of an elastomer. Specifically, the base segment 111 may be located in the connecting segment 13 and constitute a part of the connecting segment 13. For example, the length of the base segment 111 in the radial direction may be less than the length of the connecting segment 13 in the radial direction, so that the free end of the base segment 111 is also located in the connecting segment 13. The bending segment 112 and the second bending segment 113 are located in the outer lip segment 12 and constitute a part of the outer lip segment 12. Figure 1 and Figure 3 As shown, the surface of the bending segment 112 close to the base segment 111 can be aligned with the surface of the outer lip segment 12 close to the connecting end 13, that is, the surface of the bending segment 112 close to the base segment 111 may not be wrapped with the elastomeric material; the surface of the base segment 111 close to the bending segment 112 may be aligned with the axial inner surface of the connecting segment 13, that is, the surface of the base segment 111 close to the bending segment 112 may not be wrapped with the elastomeric material.

[0065] Combination Figure 1-3 It can be seen that the portion of the outer lip segment 12 adjacent to the connecting segment 13 (ie, the portion of the outer lip segment 12 abutting against the stopper 213, as shown in FIG. Figure 3 The inner core segment 11 may be a component with uniform thickness, such as a portion formed by stamping a sheet of constant thickness such as a metal plate, so the thickness s4 of the base segment 111 in the axial direction is the plate thickness, which may range from 0.2 mm to 1.5 mm. According to some embodiments of the bearing cap disclosed herein, the thickness s4 of the base segment 111 in the axial direction is designed to be smaller, thereby increasing the thickness difference s1, so that when the bearing cap 1 is assembled to the bearing body 2, the axial inner surfaces of the connecting segment 12 and the inner lip segment 14 can be further away from the rolling element 25, thereby increasing the volume of the bearing cavity and reducing the risk of interference.

[0066] The specific selection of s4 is related to the bearing body 2 to be matched with the bearing cover 1, especially to the width a of the sealing groove 212. The width a of the sealing groove 212 is as follows: Figure 4 and Figure 5 As shown, the thickness s4 of the base section 111 in the axial direction may be between 0.3 and 0.35 times the width a of the sealing groove 212. This design can increase the volume of the bearing cavity, reduce the risk of interference, and ensure the strength of the bearing cover 1.

[0067] Figure 4 Show Figure 3A partial enlarged view of the bearing body in FIG. 2 , wherein the width a 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 stop portion 213. Figure 4 In the embodiment shown in FIG. 1 , the width a is shown as: a straight line ( Figure 4 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. Figure 5 As shown, in some embodiments, the protruding corner portion 214 at the adjacent joint of the blocking portion 211 and the sealing groove 212 has a rounded or chamfered structure to reduce the possibility that the protruding corner portion 214 will damage the bearing cover 1 during assembly or produce other adverse effects during use. Those skilled in the art can also understand that the rounding or chamfering should not affect the definition of the width a of the sealing groove 212. The width a of the sealing groove 212 can still refer to the chord length of the arc cross-section segment of the sealing groove between the blocking portion 211 and the stopper 213 before chamfering or rounding. Figure 5 In the embodiment shown in FIG. 1 , the width a is shown as: a straight line ( Figure 5 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 5 The minimum value of the distance between the intersection points of the two axes (the missing parts are shown by dotted lines).

[0068] Please refer to Figure 1-5 In order to ensure that the distance between the axially outer surface of the bearing cover 1 and the bearing end surface 24 after installation is within the required range, the maximum thickness s6 of the outer lip section 12 in the axial direction is greater than the axial depth c of the sealing groove 212 (such as Figure 4 and Figure 5 As shown, that is, the maximum distance between the sealing groove 212 and the bearing end surface 24 is between 0.05 mm and 0.25 mm.

[0069] According to some embodiments of the present disclosure, the position of the inner core segment 11 relative to the bearing cap 1 in the axial direction is defined as follows: the minimum axial distance s13 (such as Figure 2 ) and the minimum axial distance s14 (as shown) from the bending section 112 to the plane where the second end surface of the outer lip section 12 is located. Figure 2The first end face and the second end face of the outer lip segment 12 define the maximum width s6 of the outer lip segment 12 in the axial direction. This design makes the part of the outer lip segment 12 that abuts against the stopper 213 to be an elastomeric material with a thickness of at least 0.05 mm, which can reduce the possibility of transitional deformation of the bearing outer ring 21 after assembly, and the design further ensures that the distance between the axial outer side surface of the connecting segment 13 and the bearing end face 24 is within the required range, and the elastomeric material with a thickness of more than 0.05 mm at the axial outer side surface can play a buffering role, reducing the impact or interference of the external environment on the bearing cover 1 and causing local deformation of the bearing cover.

[0070] In order to ensure the matching strength between the bearing cover 1 and the sealing groove 212, the outer lip segment 12 may further include a bent free end 121, the free end 121 is bent to form a recess, and the recess provides a deformation space for the deformation of the outer lip segment 12 during assembly. Figure 1 The maximum thickness s9 of the free end 121 in the axial direction (as shown in FIG. Figure 2 2) is between the width a-0.05 mm of the sealing groove 212 and the width a+0.2 mm of the sealing groove 212; in some embodiments, the maximum thickness s9 of the free end 121 in the axial direction is 0.1 mm greater than the width a of the sealing groove 212. This design provides an interference portion (such as Figure 3 As shown), the interference portion will deform toward the recess formed by the free end 121 to ensure the fitting strength.

[0071] When the bearing cap 1 is matched with the bearing body 2, the outer lip section 12 abuts against the stopper 213. In order to reduce the possibility of excessive axial deformation of the bearing cap 1 during abutment, the maximum outer diameter s11 of the inner core section 11 may be larger than the minimum inner diameter d of the stopper 213. Figure 3 In addition, the maximum outer diameter s11 of the inner core segment 11 may be smaller than the minimum inner diameter b of the blocking portion 211 , such as between 0.7 mm and 1.5 mm, to ensure that the bearing cap 1 can be installed in the opening defined by the blocking portion 211 and abut against the stopper 213 .

[0072] According to some embodiments of the bearing cover disclosed herein, the inner lip segment 14 is also improved, and the maximum thickness s3 of the inner lip segment 14 in the axial direction can be set to between 0.8 mm and 1.8 mm. The thickness s3 of the inner lip segment 14 is thereby reduced, which helps to further reduce the risk of interference with the rolling elements 25 and the rolling element retainer 26 in the bearing cavity 23.

[0073] In some embodiments, a groove 141 may be provided on the surface of the inner lip segment 13 that cooperates with the bearing inner ring 22 (i.e., the surface located at the radial innermost side). The groove 141 may have a "V"-shaped cross-section, and its maximum width s12 may be set between 0.4 mm and 1.0 mm. The edge width s2 of the groove 141 (i.e., Figure 2 As shown, the minimum distance of the groove 141 from the surface of the axial outer side of the bearing cap 1 is between 0.5 mm and 1.5 mm smaller than the maximum thickness s3 of the inner lip section 14 in the axial direction. The design of the groove can reduce the influence of uneven stress deformation caused by the large thickness of the inner lip section 13 during the manufacturing process.

[0074] 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.

[0075] 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 (1), comprising: An inner lip section (14) is located radially inside the bearing cover (1). An outer lip section (12) is located radially outside the bearing cover (1). A connecting section (13) having a plate-like structure, connecting the outer lip section (12) and the inner lip section (14), and parallel to the radial direction of the bearing cover (1), The bearing cover (1) further comprises an inner core section (11), wherein the inner core section (11) comprises: A base section (111) having a plate-like structure, parallel to the radial direction of the bearing cover (1), a bent section (112) located radially outside the base section (111) and extending from the base section (111) at an angle to the base section (111); The base section (111) is located at the connecting section (13) and constitutes a part of the connecting section (13); the bending section (112) is located at the outer lip section (12) and constitutes a part of the outer lip section (12); The elastic modulus of the material of the remaining sections of the bearing cover (1) except the inner core section (11) is smaller than the elastic modulus of the material of the inner core section (11), A portion of the outer lip section (12) adjacent to the connecting section (13) has a thickness difference (s1) with the connecting section (13) in the axial direction on a side of the connecting section (13) close to the bending section (112), and the thickness difference (s1) is in the range of w+0.05mm to 1.5*w+0.2mm, wherein w is the thickness (s4) of the base section (111) in the axial direction of the bearing cover (1).

2. The bearing cap (1) according to claim 1, wherein: The thickness (s4) of the base segment (111) in the axial direction is in the range of 0.2 mm to 1.5 mm.

3. The bearing cap (1) according to claim 1, wherein: The inner core segment (11) further comprises a second bending segment (113) which is not parallel to the axial direction, wherein the second bending segment (113) is located radially outside the bending segment (112) and extends from the bending segment (112) in a direction away from the base segment (111).

4. The bearing cap (1) according to claim 3, wherein: The length (s5) of the second bending section (113) is greater than or equal to 0.2 mm.

5. The bearing cap (1) according to claim 3, wherein: The bending section (112) is substantially parallel to the axial direction.

6. The bearing cap (1) according to claim 1, wherein: The maximum thickness (s3) of the inner lip section (14) in the axial direction of the bearing cover (1) is between 0.8 mm and 1.8 mm.

7. The bearing according to claim 6, wherein A groove is provided on the radial inner side of the inner lip segment (14), and the maximum width (s12) of the groove is between 0.4 mm and 1.0 mm.

8. The bearing cap (1) according to claim 1, wherein: The length (s7) of the inner core segment (11) in the radial direction is between 0.5 and 0.9 times the length (s10) of the bearing cover (1) in the radial direction.

9. The bearing cap (1) according to claim 8, wherein: The minimum axial distance (s13) from the bending section (112) to the plane where the first end face of the outer lip section (12) is located is greater than 0.05 mm, and the minimum axial distance (s14) from the bending section (112) to the plane where the second end face of the outer lip section (12) is located is greater than 0.05 mm, and the first end face and the second end face of the outer lip section (12) define the maximum width (s6) of the outer lip section (12) in the axial direction.

10. A bearing comprising a bearing body (2) and at least one bearing cap (1) according to any one of the preceding claims, wherein: The bearing cover (1) cooperates with the bearing body (2) so that a bearing cavity (23) is formed between the bearing cover (1) and the bearing body (2). The bearing body (2) comprises a bearing inner ring (22) and a bearing outer ring (21) located radially outside the bearing inner ring (22), and the bearing outer ring (21) comprises: The blocking portion (211) is located at the end surface of the bearing outer ring (21) and extends radially inwardly. a sealing groove (212) adjacent to the blocking portion (211), located radially inside the blocking portion (211) and opening toward the radially inward direction, and a stopper (213) adjacent to the sealing groove (212) and located on a side of the sealing groove (212) opposite to the blocking portion (211), wherein the minimum diameter of the stopper (213) is smaller than the minimum diameter of the blocking portion (211), The bearing cover (1) and the bearing body (2) are assembled such that the inner lip section (14) cooperates with the bearing inner ring (22) of the bearing body (2), and the outer lip section (12) of the bearing cover (1) is deformed to be accommodated in the sealing groove (212) of the bearing outer ring (21). The thickness (s4) of the base section (111) in the axial direction is between 0.3 times and 0.35 times the width (a) of the sealing groove (212).

11. The bearing according to claim 10, wherein: The maximum outer diameter (s11) of the inner core segment (11) is larger than the minimum inner diameter (d) of the stopper (213).

12. The bearing according to claim 11, wherein: The maximum outer diameter (s11) of the inner core segment (11) is between 0.7 mm and 1.5 mm smaller than the minimum inner diameter (b) of the blocking portion (211).

13. The bearing according to claim 10, wherein: The maximum thickness (s6) of the outer lip segment (12) in the axial direction is between 0.05 mm and 0.25 mm smaller than the axial depth (c) of the sealing groove (212).

14. The bearing according to claim 10, wherein: The outer lip segment (12) includes a curved free end (121), and the maximum thickness (s9) of the free end (121) in the axial direction is between n-0.05mm and n+0.2mm, where n is the width (a) of the sealing groove (212).

15. The bearing according to claim 10, wherein: The inner lip section (14) of the bearing cover (1) is clearance-matched with the bearing inner ring (22).

Images