Ball cage and rolling bearing

Abstract

The utility model provides a ball retainer and a rolling bearing, the ball retainer comprises a cylindrical retainer body, the cylinder wall of the retainer body is provided with a ball mounting hole, and the ball mounting hole is a spherical hole penetrating through the cylinder wall of the retainer body and is provided with an inner opening close to the inner side of the retainer body and an outer opening close to the outer side of the retainer body; the frame body comprises a first elastic deformation part arranged around the inner opening, and the first elastic deformation part is configured to generate elastic deformation when the balls are mounted in the ball mounting holes from the inner opening so as to enlarge the inner opening and elastically reset after the balls are mounted in the ball mounting holes so as to shrink the inner opening and limit the balls in the ball mounting holes in a rolling manner; and / or the frame body comprises a second elastic deformation part arranged around the outer opening, and the second elastic deformation part is configured to generate elastic deformation when the balls are installed in the ball installation holes from the outer opening so as to enlarge the outer opening and elastically reset after the balls are installed in the ball installation holes so as to enlarge the outer opening. The outer opening is narrowed, and the ball is limited in the ball mounting hole in a rolling mode.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a ball retainer and a rolling bearing. Background Art

[0002] The ball cage is one of the core components of rolling bearings. The functions of the ball cage include: separating the balls to prevent the balls from rubbing and colliding with each other; guiding the movement of the balls to ensure the smooth operation of the bearing; fixing and restraining the balls to prevent the balls from falling off; and bearing the load from the inner and outer rings of the bearing together with the balls. In the related art, the ball cage usually includes a split ball cage and an integral ball cage. For the split ball cage, it is difficult to assemble, and the connection parts are easy to loosen during use, and the stability is relatively poor. Although the integral ball cage has better stability than the split ball cage and is less difficult to assemble itself, after the balls are installed in each ball mounting hole of the integral ball cage, they need to be riveted separately, which makes the ball installation more complicated and the installation efficiency is low. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a ball cage and a rolling bearing, so as to improve the problem of complex ball installation and low installation efficiency of the integral ball cage in the related art.

[0004] The present application provides a ball retainer, comprising: a frame body, which is cylindrical, and a ball mounting hole is opened on the cylinder wall of the frame body, wherein the ball mounting hole is a spherical hole, and the ball mounting hole has an opening, and the frame body comprises an elastic deformation portion arranged around the opening, and the elastic deformation portion is configured to undergo elastic deformation when the ball is installed into the ball mounting hole to expand the opening, and elastically reset after the ball is installed into the ball mounting hole to reduce the opening and roamably limit the ball in the ball mounting hole, wherein the ball mounting hole is a through hole that passes through the cylinder wall of the frame body, and the opening comprises an inner opening close to the inner side of the frame body and an outer opening close to the outer side of the frame body, and the elastic deformation portion is arranged around the inner opening and / or the outer opening.

[0005] In the ball retainer provided by the present application, an elastic deformation part is provided on the frame body around the opening of the ball mounting hole. In the process of installing the ball in the ball mounting hole, the ball can be used to open the opening, so that the elastic deformation part undergoes elastic deformation. After the ball is installed in the ball mounting hole, the elastic deformation part is elastically reset, so that the opening of the ball mounting hole returns to its initial size, thereby limiting the ball to be rollable in the ball mounting hole. It can be seen that the ball retainer provided by the present application does not need to be subjected to riveting treatment when installing the ball, so the installation is relatively simple, which helps to improve the installation efficiency. In addition, the ball retainer of the present application does not need to reserve a thickness space for the plastic deformation of the retainer, so the gap between the ball mounting hole on the ball retainer and the ball can be made smaller, thereby reducing the shaking amount of the ball retainer and improving the transmission accuracy of the rolling bearing.

[0006] In some embodiments, the number of the ball mounting holes is multiple, and the multiple ball mounting holes are arranged in groups. The ball mounting holes in each group pass through the same circumference, and / or are arranged at equal angular distances along the cylindrical wall of the frame.

[0007] The ball retainer provided in the present application includes a plurality of ball mounting holes, and the plurality of ball mounting holes are arranged in groups, and the different ball mounting holes in each group pass through the same circumference, and / or are arranged at equal angular intervals along the cylindrical wall of the frame body, so that when the ball retainer is installed with balls and used in a rolling bearing, it helps to better bear the load from the inner ring and / or outer ring of the bearing, and improve the running stability of the rolling bearing.

[0008] In some embodiments, the plurality of ball mounting holes are grouped into a plurality of groups, and the plurality of groups of ball mounting holes are arranged in an array or staggered along the axial direction of the frame.

[0009] The ball retainer provided in the present application divides multiple ball mounting holes into multiple groups, and the multiple groups of ball mounting holes are arranged in an array or staggered along the axial direction of the frame. When the ball retainer is installed with balls and applied to rolling bearings, it helps to better withstand the load from the inner ring and / or outer ring of the bearing and further improve the running smoothness of the rolling bearing.

[0010] In some embodiments, the diameter of the inner opening is the same as the diameter of the outer opening.

[0011] In the present application, by setting the diameter of the inner opening to be the same as the diameter of the outer opening, it helps to reduce the difficulty of processing the ball retainer and helps to make the balls be installed into the ball mounting holes more smoothly. In addition, it helps to make the balls move more smoothly and evenly in the raceway, reducing jamming and abnormal friction.

[0012] In some embodiments, the cylindrical wall of the frame body is also provided with an annular groove, the notch of the annular groove faces the inner side of the frame body, the number of the annular grooves corresponds to the number of groupings of the ball mounting holes, and each of the annular grooves is connected to a corresponding group of the ball mounting holes.

[0013] The ball retainer provided in the present application has an annular groove on the cylindrical wall of the frame body, and the annular groove can be used to store lubricating grease. Since the number of annular grooves corresponds to the number of groupings of ball mounting holes, each annular groove is connected to a corresponding group of ball mounting holes, and each annular groove helps to make the lubricating grease in the corresponding group of ball mounting holes tend to be uniform; and the notch of the annular groove is toward the inner side of the frame body, which can prevent the lubricating grease from leaving the ball retainer due to the action of centrifugal force under high-speed rotation.

[0014] In some embodiments, the ratio of the depth of the annular groove to the thickness of the cylindrical wall of the frame is less than 0.5.

[0015] In the present application, by setting the ratio of the groove depth of the annular groove to the wall thickness of the frame body to be less than 0.5, it is helpful to utilize the annular groove to store grease and make the grease of the ball mounting holes in the same group tend to be uniform while taking into account the structural strength of the frame body.

[0016] In some embodiments, the frame is further provided with a plurality of strip holes, each of the strip holes is correspondingly connected to a ball mounting hole, and the major diameter of the strip hole passes through the axis of the corresponding ball mounting hole.

[0017] In the present application, a plurality of strip holes are arranged on the frame, each strip hole is connected to a corresponding ball mounting hole, and the major diameter of the strip hole passes through the axis of the corresponding ball mounting hole. When the ball is installed into the ball mounting hole, the ball can be pushed into the ball mounting hole from the connection between the strip hole and the ball mounting hole. This can reduce the deformation of the elastic deformation part caused in the process of installing the ball into the ball mounting hole, and reduce the difficulty of elastic reset of the elastic deformation part after the ball is installed into the ball mounting hole, which helps to further reduce the difficulty of ball installation, ensure the limiting effect of the elastic deformation part on the ball installed in the ball mounting hole, and ensure the rollability of the ball after being installed in the ball mounting hole.

[0018] In some embodiments, the extension directions of any two adjacent strip-shaped holes are parallel to each other.

[0019] In the present application, by setting the extension directions of any two adjacent strip holes to be parallel to each other, on the one hand, it helps to reduce the difficulty of manufacturing the ball cage, and on the other hand, it helps to ensure the structural strength of the ball cage.

[0020] In some embodiments, the angle between the major diameter of each of the strip-shaped holes and the axis of the frame is between 20° and 70°.

[0021] In the present application, by setting the angle between the major diameter of the strip hole and the axis of the frame body to be between 20° and 70°, it helps to further ensure the structural strength of the ball retainer.

[0022] In some embodiments, the long diameter length of each of the strip holes is 1.5 to 1.8 times the ball diameter corresponding to the corresponding ball mounting hole; and / or, the short diameter length of each of the strip holes is 0.3 times the ball diameter corresponding to the corresponding ball mounting hole.

[0023] In the present application, by setting the long diameter length of the strip hole to 1.5 to 1.8 times the ball diameter corresponding to the corresponding mounting hole; and / or setting the short diameter length of the strip hole to 0.3 times the ball diameter corresponding to the corresponding ball mounting hole, it helps to further reduce the difficulty of ball installation while taking into account the structural strength of the ball retainer.

[0024] In some embodiments, each of the strip-shaped holes includes a first hole segment and a second hole segment located on both sides of the corresponding ball mounting hole, the first hole segment and the second hole segment are both connected to the ball mounting hole and are rotationally symmetrical relative to the axis of the ball mounting hole.

[0025] In the present application, the strip hole includes a first hole segment and a second hole segment located on both sides of the corresponding ball mounting hole, and the first hole segment and the second hole segment are both connected to the ball mounting hole and are rotationally symmetrical relative to the axis of the ball mounting hole. When the user installs the ball into the ball mounting hole, the user can choose to push the ball into the ball mounting hole from the connection between the first hole segment or the second hole segment and the ball mounting hole, thereby improving the user experience.

[0026] In some embodiments, in each group of the ball mounting holes, the shortest distance between the strip hole connected to the previous ball mounting hole and the next ball mounting hole in two adjacent ball mounting holes is smaller than the thickness of the tube wall of the frame.

[0027] In the present application, by setting the shortest distance between the strip hole connected to the previous ball mounting hole and the next ball mounting hole in two adjacent ball mounting holes in each group of ball mounting holes to be smaller than the thickness of the tube wall of the frame body, it is helpful to set as many ball mounting holes as possible, so that the ball retaining frame can better withstand the load from the inner ring and / or outer ring of the bearing after the balls are loaded and applied to the rolling bearing.

[0028] In some embodiments, in two adjacent groups of the ball mounting holes, in two adjacent ball mounting holes along the axial direction of the frame, the shortest distance between the strip hole connected to the previous ball mounting hole and the next ball mounting hole is less than the thickness of the tube wall of the frame.

[0029] In the present application, by setting the shortest distance between the strip hole connected to the previous ball mounting hole and the next ball mounting hole in two adjacent groups of ball mounting holes along the axial direction of the frame to be smaller than the thickness of the tube wall of the frame, it is helpful to set as many ball mounting holes as possible, so that the ball retaining frame can better withstand the load from the inner ring and / or outer ring of the bearing after the balls are loaded and applied to the rolling bearing.

[0030] The present application also provides a rolling bearing, comprising: the aforementioned ball retainer; a ball, which is rotatably arranged in the ball mounting hole; and a bearing inner ring, which is sleeved in the frame body, the outer circumferential surface of the bearing inner ring abuts against the ball and is spaced apart from the inner wall of the tube of the frame body; and / or a bearing outer ring, which is sleeved outside the frame body, the inner circumferential surface of the bearing outer ring abuts against the ball and is spaced apart from the outer wall of the tube of the frame body.

[0031] In some embodiments, the diameter φ2 of the ball, the outer diameter U of the bearing inner ring, the inner diameter V of the bearing outer ring, and the ball diameter φ1 corresponding to the ball mounting hole satisfy: φ2>(UV) / 2+(φ1-φ2).

[0032] In the present application, by making the ball diameter, the outer diameter of the bearing inner ring, the inner diameter of the bearing outer ring and the ball diameter corresponding to the ball mounting hole satisfy the above formula, the ball retainer and the bearing inner ring and the bearing outer ring can always maintain a mutual spacing state, reducing mutual interference.

[0033] In some embodiments, the difference between the ball diameter corresponding to the ball mounting hole and the diameter of the ball is between 0.001 mm and 0.2 mm.

[0034] In the present application, setting the difference between the ball diameter corresponding to the ball mounting hole and the ball between 0.001 mm and 0.2 mm helps to take into account both the positioning of the ball by the ball mounting hole and the rollability of the ball in the ball mounting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the three-dimensional structure of a ball retainer carrying balls provided in an embodiment of the present application.

[0037] Figure 2 for Figure 1 Front view of the ball cage in .

[0038] Figure 3 for Figure 1 Top view of the ball cage in Figure 1.

[0039] Figure 4 For along Figure 2 Section view along line AA.

[0040] Icon: ball cage 11; ball 15; frame 111; ball mounting hole 112; opening 1121; elastic deformation portion 113; annular groove 114; strip hole 115; first hole section 1151; second hole section 1152. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0042] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] See also Figure 1 The embodiment of the present application provides a ball cage 11, which is applied to a rolling bearing and is used to carry balls 15. The balls 15 are rollably mounted on the ball cage 11.

[0045] The ball retainer 11 includes a frame body 111. The frame body 111 may be cylindrical. A ball mounting hole 112 is provided on the wall of the frame body 111. The ball mounting hole 112 is a spherical hole. The ball mounting hole has an opening 1121. The frame body 111 includes an elastic deformation portion 113 arranged around the opening 1121. The elastic deformation portion 113 is used to elastically deform when the ball 15 is installed in the ball mounting hole 112 to expand the opening 1121, and elastically reset after the ball 15 is installed in the ball mounting hole 112 to reduce the opening 1121 and limit the ball 15 to be rollable in the ball mounting hole 112.

[0046] It should be noted that the ball mounting hole 112 being a spherical hole means that the hole walls of the ball mounting hole 112 are spherical, and does not mean that the hole walls of the ball mounting hole 112 enclose a complete sphere.

[0047] It should be noted that the elastic deformation portion 113 disposed around the opening 1121 on the frame 111 may refer to a portion between the hole wall of the ball mounting hole 112 and the tube wall of the frame 111 that gradually becomes thinner along a direction close to the axis of the ball mounting hole 112 .

[0048] See also Figures 2 to 4 In some embodiments, the ball mounting hole 112 may be a through hole penetrating the wall of the frame 111. The opening 1121 includes an inner opening close to the inner side of the frame 111 and an outer opening close to the outer side of the frame 111. The frame 111 may be provided with an elastic deformation portion 113 around the inner opening; an elastic deformation portion 113 around the outer opening; or, elastic deformation portions 113 may be provided around the inner opening and the outer opening, respectively.

[0049] In the embodiment of the present application, the ball mounting hole 112 is set as a through hole penetrating the wall of the frame body 111, so that the ball retainer 11 can withstand the load from the inner ring and the outer ring of the bearing at the same time after the ball 15 is installed and applied to the rolling bearing.

[0050] See also Figure 3 and Figure 4 In some embodiments, the diameter of the inner opening is the same as the diameter of the outer opening.

[0051] In the embodiment of the present application, by setting the diameter of the inner opening to be the same as the diameter of the outer opening, it helps to reduce the difficulty of processing the ball retainer 11, and helps to make the ball 15 be installed in the ball mounting hole 112 more smoothly. In addition, it helps to make the ball 15 move more smoothly and evenly in the raceway, reducing jamming and friction abnormalities.

[0052] In the embodiment of the present application, an elastic deformation part 113 is provided on the frame body 111 of the ball retainer 11 around the opening 1121 of the ball mounting hole 112. In the process of installing the ball 15 in the ball mounting hole 112, the ball 15 can be used to open the opening 1121, so that the elastic deformation part 113 undergoes elastic deformation. After the ball 15 is installed in the ball mounting hole 112, the elastic deformation part 113 elastically resets, so that the opening 1121 of the ball mounting hole 112 returns to its initial size, thereby limiting the ball 15 to be rollable in the ball mounting hole 112. The ball retainer 11 of the present application does not need to be riveted when installing the ball 15, thereby making the installation of the ball 15 relatively simple, which helps to improve the installation efficiency of the ball 15. In addition, the ball retainer 11 of the present application does not need to reserve thickness space for plastic deformation of the retainer. Therefore, the gap between the ball mounting hole 112 on the ball retainer 11 and the ball 115 can be made smaller, thereby reducing the shaking amount of the ball retainer 11 and improving the transmission accuracy of the rolling bearing.

[0053] In some embodiments, there are multiple ball mounting holes 112. The multiple ball mounting holes 112 are evenly distributed on the ball retainer 11. The multiple ball mounting holes 112 are arranged in groups. Each group can contain the same number of ball mounting holes 112.

[0054] In one embodiment, the ball mounting holes 112 in each group may pass through the same circumference. For example, the centers of the ball mounting holes 112 in each group may be coplanar, and the plane where the centers of the ball mounting holes 112 in each group are located is perpendicular to the axis of the frame 111 .

[0055] It should be noted that the center of the ball mounting hole 112 refers to the geometric center of the hole shape of the ball mounting hole 112 .

[0056] In another embodiment, the ball mounting holes 112 in each group can be arranged at equal angular distances along the wall of the frame 111. For example, the ball mounting holes 112 in each group can pass through the same circumference and be arranged at equal angular distances along the wall of the frame 111. Alternatively, the ball mounting holes 112 in each group can be arranged in a spiral around the frame 111 and be arranged at equal angular distances along the circumference of the frame 111.

[0057] The ball retainer 11 of the embodiment of the present application includes a plurality of ball mounting holes 112, and the plurality of ball mounting holes 112 are arranged in groups, and the different ball mounting holes 112 in each group pass through the same circumference, and / or are arranged at equal angular intervals along the cylindrical wall of the frame body 111, so that when the ball retainer 11 is installed with the ball 15 and applied to the rolling bearing, it helps to better bear the load from the inner ring and / or outer ring of the bearing and improve the running stability of the rolling bearing.

[0058] In some embodiments, the plurality of ball mounting holes 112 are grouped into a plurality of groups. The plurality of groups of ball mounting holes 112 are arranged in an array or staggered along the axial direction of the frame 111 .

[0059] See also Figure 1 and Figure 2 In one embodiment, the plurality of groups of ball mounting holes 112 are arranged in an array along the axial direction of the frame body 111. Specifically, any two adjacent groups of ball mounting holes 112 are arranged in a one-to-one correspondence. The hole center connection line of any two corresponding ball mounting holes 112 in the two adjacent groups of ball mounting holes 112 is parallel to the axis of the ball cage 11.

[0060] In another embodiment, the plurality of groups of ball mounting holes 112 are staggered along the axial direction of the frame 111. Specifically, for any two adjacent groups of ball mounting holes 112 in the plurality of groups of ball mounting holes 112, any ball mounting hole 112 in one group is located between two adjacent ball mounting holes 112 in the other group. Furthermore, the distance between the axis of any ball mounting hole 112 in one group and the axis of two adjacent ball mounting holes 112 in the other group is the same.

[0061] It can be understood that arranging the plurality of groups of ball mounting holes 112 in an axially staggered manner along the frame body 111 helps to ensure the structural strength of the ball retainer 11 .

[0062] Figure 2 In the illustrated embodiment, the plurality of ball mounting holes 112 are grouped into two groups, and the two groups of ball mounting holes 112 are arranged in an array along the axial direction of the frame body 111 .

[0063] The ball retainer 11 of the embodiment of the present application divides the multiple ball mounting holes 112 into multiple groups, and the multiple groups of ball mounting holes 112 are arranged in an array or staggered along the axial direction of the frame body 111. When the ball retainer 11 is installed with balls 15 and applied to rolling bearings, it helps to better withstand the load from the inner ring and / or outer ring of the bearing and further improve the running smoothness of the rolling bearing.

[0064] See also Figure 1 In some embodiments, the cylindrical wall of the frame body 111 may further be provided with an annular groove 114. The notch of the annular groove 114 may face the inner side of the frame body 111. The number of the annular grooves 114 corresponds to the number of groups of the ball mounting holes 112, and each annular groove 114 communicates with a corresponding group of ball mounting holes 112.

[0065] Exemplarily, each annular groove 114 passes through the axis of each ball mounting hole 112 in the corresponding set of ball mounting holes 112. Further, the center line of each annular groove 114 along its groove width direction is coplanar with the axis of each ball mounting hole 112 in the corresponding set of ball mounting holes.

[0066] In the embodiment of the present application, an annular groove 114 is opened on the cylindrical wall of the frame 111, and the annular groove 114 can be used to store grease. Since the number of the annular grooves 114 corresponds to the number of groupings of the ball mounting holes 112, each annular groove 114 is connected to a corresponding group of ball mounting holes 112, and each annular groove 114 helps to make the grease in the corresponding group of ball mounting holes 112 tend to be uniform; and the notch of the annular groove 114 is toward the inside of the frame 111, which can prevent the grease from leaving the ball retaining frame 11 due to the action of centrifugal force under high-speed rotation.

[0067] In some embodiments, the ratio of the depth of the annular groove 114 to the wall thickness of the frame body 111 is less than 0.5.

[0068] In the embodiment of the present application, by setting the ratio of the groove depth of the annular groove 114 to the wall thickness of the tube wall of the frame 111 to be less than 0.5, it is helpful to utilize the annular groove 114 to store grease and make the grease of the ball mounting holes 112 in the same group tend to be uniform while taking into account the structural strength of the frame 111.

[0069] Please refer again Figure 2 In some embodiments, the frame 111 may further be provided with a plurality of strip holes 115. Each strip hole 115 is correspondingly connected to a ball mounting hole 112. The major diameter of each strip hole 115 passes through the axis of the corresponding ball mounting hole 112.

[0070] In the embodiment of the present application, a plurality of strip holes 115 are provided on the frame 111, each strip hole 115 is connected to a corresponding ball mounting hole 112, and the major diameter of the strip hole 115 passes through the axis of the corresponding ball mounting hole 112. When the ball 15 is installed into the ball mounting hole 112, the ball 15 can be pushed into the ball mounting hole 112 from the connection between the strip hole 115 and the ball mounting hole 112. This can reduce the deformation of the elastic deformation part 113 caused in the process of installing the ball 15 into the ball mounting hole 112, and reduce the difficulty of elastically resetting the elastic deformation part 113 after the ball 15 is installed in the ball mounting hole 112, which helps to further reduce the difficulty of installing the ball 15, ensure that the elastic deformation part 113 limits the ball 15 installed in the ball mounting hole 112, and ensure the rollability of the ball 15 after being installed in the ball mounting hole 112.

[0071] In some embodiments, the extension directions of any two adjacent strip-shaped holes 115 are parallel to each other.

[0072] In the embodiment of the present application, by setting the extension directions of any two adjacent strip holes 115 to be parallel to each other, on the one hand, it helps to reduce the difficulty of manufacturing the ball retainer 11, and on the other hand, it helps to ensure the structural strength of the ball retainer 11.

[0073] In some embodiments, the angle between the major diameter of each strip hole 115 and the axis of the frame 111 is between 20° and 70°.

[0074] In the embodiment of the present application, by setting the angle between the major diameter of the strip hole 115 and the axis of the frame body 111 to be between 20° and 70°, it helps to further ensure the structural strength of the ball retainer 11 .

[0075] In some embodiments, the length of the major diameter of each strip hole 115 is 1.5 to 1.8 times the ball diameter corresponding to the corresponding ball mounting hole 112. Alternatively, the length of the minor diameter of each strip hole 115 is 0.3 times the ball diameter corresponding to the corresponding ball mounting hole 112. Alternatively, the length of the major diameter of each strip hole 115 is 1.5 to 1.8 times the ball diameter corresponding to the corresponding ball mounting hole 112, and the length of the minor diameter of each strip hole 115 is 0.3 times the ball diameter corresponding to the corresponding ball mounting hole 112.

[0076] In the embodiment of the present application, by setting the long diameter length of the strip hole 115 to 1.5 to 1.8 times the ball diameter corresponding to the corresponding mounting hole, and / or setting the short diameter length of the strip hole 115 to 0.3 times the ball diameter corresponding to the corresponding ball mounting hole 112, it helps to further reduce the difficulty of installing the ball 15 while taking into account the structural strength of the ball retainer 11.

[0077] In some embodiments, each strip hole 115 includes a first hole section 1151 and a second hole section 1152 located on both sides of the corresponding ball mounting hole 112. The first hole section 1151 and the second hole section 1152 are both connected to the ball mounting hole 112 and are rotationally symmetrical with respect to the axis of the ball mounting hole 112.

[0078] In the embodiment of the present application, the strip hole 115 includes a first hole segment 1151 and a second hole segment 1152 located on both sides of the corresponding ball mounting hole 112, and the first hole segment 1151 and the second hole segment 1152 are both connected to the ball mounting hole 112 and are rotationally symmetrical relative to the axis of the ball mounting hole 112. When the user installs the ball 15 into the ball mounting hole 112, the user can choose to push the ball 15 into the ball mounting hole 112 from the connection between the first hole segment 1151 or the second hole segment 1152 and the ball mounting hole 112, thereby improving the user experience.

[0079] In some embodiments, in each group of ball mounting holes 112 , the shortest distance between the strip hole 115 connected to the previous ball mounting hole 112 and the next ball mounting hole 112 in two adjacent ball mounting holes 112 is smaller than the wall thickness of the frame 111 .

[0080] In the embodiment of the present application, by setting the shortest distance between the strip hole 115 connected to the previous ball mounting hole 112 and the subsequent ball mounting hole 112 in two adjacent ball mounting holes 112 in each group of ball mounting holes 112 to be smaller than the wall thickness of the cylinder wall of the frame body 111, it is helpful to set as many ball mounting holes 112 as possible, so that the ball retaining frame 11 can better withstand the load from the inner ring and / or outer ring of the bearing after the balls 15 are loaded and applied to the rolling bearing.

[0081] In some embodiments, in two adjacent groups of ball mounting holes 112 , in two ball mounting holes 112 axially adjacent to each other along the frame 111 , the shortest distance between the strip hole 115 connected to the previous ball mounting hole 112 and the next ball mounting hole 112 is less than the wall thickness of the frame 111 .

[0082] In the embodiment of the present application, by setting the shortest distance between the strip hole 115 connected to the previous ball mounting hole 112 and the next ball mounting hole 112 in two adjacent groups of ball mounting holes 112 along the axial direction of the frame body 111 to be smaller than the wall thickness of the tube wall of the frame body 111, it is helpful to set as many ball mounting holes 112 as possible, so that the ball retainer 11 can better withstand the load from the inner ring and / or outer ring of the bearing after the balls 15 are installed and applied to the rolling bearing.

[0083] Based on the same inventive concept, an embodiment of the present application also provides a rolling bearing, including: the ball retainer 11 of the aforementioned embodiment; the ball 15, rotatably arranged in the ball mounting hole 112; and a bearing inner ring, sleeved in the frame 111, the outer circumferential surface of the bearing inner ring abuts against the ball, and is spaced apart from the inner wall of the tube of the frame 111; and / or a bearing outer ring, sleeved outside the frame 111, the inner circumferential surface of the bearing outer ring abuts against the ball, and is spaced apart from the outer wall of the tube of the frame 111.

[0084] In some embodiments, the diameter φ2 of the ball, the outer diameter U of the bearing inner ring, the inner diameter V of the bearing outer ring, and the ball diameter φ1 corresponding to the ball mounting hole 112 satisfy: φ2>(UV) / 2+(φ1-φ2).

[0085] In the embodiment of the present application, by making the diameter of the ball, the outer diameter of the bearing inner ring, the inner diameter of the bearing outer ring and the ball diameter corresponding to the ball mounting hole 112 satisfy the above formula, the ball retainer and the bearing inner ring and the bearing outer ring can always maintain a spaced state from each other, thereby reducing mutual interference.

[0086] In some embodiments, the difference between the ball diameter corresponding to the ball mounting hole 112 and the diameter of the ball is between 0.001 mm and 0.2 mm.

[0087] In the embodiment of the present application, by setting the difference between the ball diameter corresponding to the ball mounting hole 112 and the ball diameter between 0.001 mm and 0.2 mm, it helps to take into account both the limiting effect of the ball mounting hole 112 on the ball 15 and the rollability of the ball 15 in the ball mounting hole 112.

[0088] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A ball cage, characterized in that: include: The frame body is cylindrical, and a ball mounting hole is opened on the wall of the frame body, and the ball mounting hole is a spherical hole; the ball mounting hole has an opening, and the frame body includes an elastic deformation part arranged around the opening, and the elastic deformation part is configured to undergo elastic deformation when the ball is installed in the ball mounting hole to expand the opening, and elastically reset after the ball is installed in the ball mounting hole to reduce the opening and roamably limit the ball in the ball mounting hole; wherein the ball mounting hole is a through hole that passes through the wall of the frame body, and the opening includes an inner opening close to the inner side of the frame body and an outer opening close to the outer side of the frame body, and the elastic deformation part is arranged around the inner opening and / or the outer opening.

2. The ball retainer according to claim 1, characterized in that: The number of the ball mounting holes is multiple, and the multiple ball mounting holes are arranged in groups; the ball mounting holes in each group pass through the same circumference, and / or are arranged at equal angular distances along the cylindrical wall of the frame.

3. The ball retainer according to claim 2, characterized in that: The plurality of ball mounting holes are grouped into a plurality of groups, and the plurality of groups of ball mounting holes are arranged in an array or staggered along the axial direction of the frame.

4. The ball retainer according to claim 2 or 3, characterized in that: The cylindrical wall of the frame body is also provided with an annular groove, the notch of the annular groove faces the inner side of the frame body, the number of the annular grooves corresponds to the number of groupings of the ball mounting holes, and each annular groove is connected to a corresponding group of the ball mounting holes.

5. The ball retainer according to claim 4, characterized in that: The ratio of the groove depth of the annular groove to the wall thickness of the cylinder wall of the frame body is less than 0.

5.

6. The ball retainer according to claim 2 or 3, characterized in that: The frame is also provided with a plurality of strip holes, each of which is connected to a corresponding ball mounting hole; the long diameter of the strip hole passes through the axis of the corresponding ball mounting hole, and / or the extension directions of any two adjacent strip holes are parallel to each other.

7. The ball retainer according to claim 6, characterized in that: The angle between the major diameter of each of the strip-shaped holes and the axis of the frame is between 20° and 70°.

8. The ball retainer according to claim 6, characterized in that: The length of the major axis of each of the strip holes is 1.5 to 1.8 times the diameter of the ball corresponding to the corresponding ball mounting hole; and / or the length of the minor axis of each of the strip holes is 0.3 times the diameter of the ball corresponding to the corresponding ball mounting hole.

9. The ball retainer according to claim 6, characterized in that: Each of the strip-shaped holes includes a first hole segment and a second hole segment located on both sides of the corresponding ball mounting hole. The first hole segment and the second hole segment are both connected to the ball mounting hole and are rotationally symmetrical relative to the axis of the ball mounting hole.

10. The ball retainer according to claim 9, characterized in that: In each group of the ball mounting holes, the shortest distance between the strip hole connected to the previous ball mounting hole and the next ball mounting hole in two adjacent ball mounting holes is smaller than the thickness of the tube wall of the frame.

11. The ball retainer according to claim 9, characterized in that: In two adjacent groups of the ball mounting holes, in two adjacent ball mounting holes along the axial direction of the frame, the shortest distance between the strip hole connected to the previous ball mounting hole and the next ball mounting hole is less than the thickness of the tube wall of the frame.

12. A rolling bearing, characterized in that: include: The ball retainer according to any one of claims 1 to 11; A ball, the ball being rotatably disposed in the ball mounting hole ； and The inner ring of the bearing is sleeved in the frame, the outer peripheral surface of the inner ring of the bearing abuts against the ball and is spaced from the inner wall of the frame; and / or The outer ring of the bearing is sleeved outside the frame body, the inner peripheral surface of the outer ring of the bearing abuts against the ball, and is spaced apart from the outer wall of the tube of the frame body.

13. The rolling bearing according to claim 12, characterized in that: The difference between the ball diameter corresponding to the ball mounting hole and the diameter of the ball is between 0.001mm and 0.2mm; and / or the diameter φ2 of the ball, the outer diameter U of the bearing inner ring, the inner diameter V of the bearing outer ring and the ball diameter φ1 corresponding to the ball mounting hole satisfy: φ2>(UV) / 2+(φ1-φ2).

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