Deep groove ball bearing retainer and bearing

Abstract

The invention relates to a deep groove ball bearing retainer and a bearing, belongs to the technical field of bearings, solves the defects of the current bearing retainer, and comprises an annular frame body, the annular frame body is provided with a plurality of ball pockets matched with steel balls and used for containing the steel balls in the circumferential direction, one side of the top of each ball pocket is provided with a spring bolt, and the top of each spring bolt is provided with a spring. Each spring bolt is fixed to the top face, located between every two adjacent pocket holes, in the frame body, each spring bolt is of an arc-shaped structure matched with the corresponding steel ball and extends in the direction of the inner side of the corresponding ball pocket, more steel balls can be contained by using the bearing retainer, the bearing capacity of a whole bearing is improved, and the service life of the bearing retainer is prolonged. And the applicability of the bearing is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and particularly relates to a cage for a deep groove ball bearing and a bearing. Background Art

[0002] The statements herein only provide the background art related to the present invention and do not necessarily constitute the prior art.

[0003] A bearing is an important component in mechanical equipment. Its main function is to support a rotating mechanical body, reduce the friction during its movement, and ensure its rotational accuracy. A bearing generally includes an inner ring, an outer ring, and a plurality of rolling elements disposed between the inner ring and the outer ring. The rolling elements are limited by a cage, and the rolling elements can adopt structures such as cones or steel balls.

[0004] The current cage of a deep groove ball bearing is an annular structure. The annular structure is provided with a plurality of ball pockets for accommodating steel balls along the circumferential direction. Lock tongues matching the steel balls are provided on both sides of the top of the ball pocket. The lock tongues lock the steel balls inside the ball pocket to prevent the steel balls from detaching from the cage. For example, Patent CN210565783U, Patent CN216554985U, and Patent Application CN113483021A all disclose a cage for a bearing. Its annular structure is provided with a plurality of ball pockets along the circumferential direction, and lock tongues are provided on both sides of the ball pocket. When adopting the above solutions, since lock tongues are provided on both sides of the ball pocket, a connecting body for connecting the two lock tongues needs to be provided between two adjacent ball pockets. The connecting body and the lock tongues on both sides occupy a relatively large space along the circumferential direction in the circumferential structure. Therefore, the number of steel balls that the entire cage can accommodate is limited, resulting in a limited load-bearing capacity of the bearing and being not suitable for use under working conditions with a relatively large load-bearing capacity. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a cage for a deep groove ball bearing and a bearing. The annular structure can accommodate more steel balls under the same size, improving the load-bearing capacity of the bearing and ensuring the self-locking of the steel balls under high-speed rotation working conditions.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a cage for a deep groove ball bearing, including an annular frame body. The annular frame body is provided with a plurality of ball pockets that match the steel balls and are used for accommodating the steel balls along the circumferential direction. One side of the top of the ball pocket is provided with a lock tongue. The lock tongue is fixed on the top surface of the part of the frame body located between two adjacent pocket holes. The lock tongue adopts an arc structure that matches the steel balls and extends towards the inner side of the ball pocket.

[0008] A locking tongue is provided on one side of the ball pocket, so that only one locking tongue needs to be accommodated in the part of the cage located between two adjacent ball pockets, reducing the volume of the part between adjacent ball pockets in the cage, and thus enabling the cage to increase the number of ball pockets.

[0009] Optionally, the inner side of the locking tongue for cooperating with the steel ball adopts a spherical surface matching the steel ball.

[0010] Optionally, the inner side of the ball pocket is a spherical surface matching the steel ball.

[0011] Optionally, the inner edge of the connection part between the locking tongue and the cage coincides with the top edge of the ball pocket so that the inner side of the locking tongue and the inner side of the ball pocket are on the same spherical surface matching the steel ball.

[0012] Optionally, in the cage, the thickness of the outer part of the part between adjacent pocket holes is greater than the thickness of the inner part so that the outer opening size of the ball pocket is smaller than the inner opening size of the ball pocket.

[0013] Optionally, a groove is provided at the center position of the bottom surface of the ball pocket.

[0014] Optionally, the number of the ball pockets is 30 - 35, preferably 32.

[0015] Optionally, a locking tongue is provided on the top surface of the cage, and a weight-reducing groove is provided on the bottom surface of the cage to reduce the weight of the entire cage.

[0016] Optionally, the cage includes an outer ring and an inner ring. A plurality of ball pockets are provided between the inner ring and the outer ring and are circumferentially distributed. A connecting body located between the inner ring and the outer ring is provided between adjacent ball pockets, and the locking tongue is provided on the top surface of the connecting body.

[0017] In a second aspect, an embodiment of the present invention provides a bearing provided with the deep groove ball bearing cage described in the first aspect.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. For the deep groove ball bearing cage of the present invention, a locking tongue is provided only on one side of the top of the ball pocket, so that only one locking tongue needs to be accommodated in the part between adjacent ball pockets in the cage, which can minimize the volume of the part between adjacent ball pockets in the cage. Compared with the structure of the traditional bearing cage, with the same-sized cage, after the volume of the part between adjacent ball pockets is reduced, the number of ball pockets that can be provided in the entire cage can be maximally increased. Thus, the number of steel balls between the inner ring and the outer ring of the bearing can be increased as much as possible, and the load borne by the bearing can be dispersed to more steel balls, improving the load-bearing capacity of the entire bearing and further enhancing the applicability of the bearing.

[0020] 2. The cage of the deep groove ball bearing of the present invention. In the cage body, the thickness of the outer side of the part located between adjacent pocket holes is greater than that of the inner side, so that the outer opening size of the ball pocket is smaller than the inner opening size of the ball pocket. And the inner edge of the connection part of the locking tongue and the cage body coincides with the top edge of the ball pocket, so that the inner side of the locking tongue and the inner side of the ball pocket are on the same spherical surface matching the steel ball. During the operation of the bearing, due to the centrifugal force, the steel ball has a tendency to move outward. Since the outer opening size of the ball pocket is smaller than the inner opening size of the ball pocket, the ball pocket and the locking tongue can better control the outward movement of the steel ball due to the centrifugal force, improving the self-locking ability of the ball pocket and the locking tongue, overcoming the problem of weakened locking ability caused by using a single-sided locking tongue, enabling the bearing to be applicable to high-speed rotation conditions and improving the applicability of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0022] Figure 1 is the overall structure schematic diagram of Embodiment 1 of the present invention Figure 1 ;

[0023] Figure 2 is the overall structure schematic diagram of Embodiment 1 of the present invention Figure 2 ;

[0024] Figure 3 is the top view of the overall structure of Embodiment 1 of the present invention;

[0025] Figure 4 is the schematic diagram of the overall structure of Embodiment 3 of the present invention;

[0026] Wherein, 1. Cage body, 2. Ball pocket, 3. Steel ball, 4. Locking tongue, 5. Groove, 6. Thickness-reducing groove;

[0027] 1-1. Inner ring, 1-2. Outer ring, 1-3. Connecting body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Embodiment 1

[0029] This embodiment provides a cage for a deep groove ball bearing, which is used for a deep groove ball bearing, such as Figures 1 - 3As shown, it includes a frame body 1. The frame body 1 adopts an annular structure. The frame body 1 is provided with a plurality of ball pockets 2 along the circumferential direction. The ball pockets 2 are matched with steel balls 3 and are used to accommodate the steel balls 3 so as to limit the steel balls 3. One side of the top of the ball pocket 2 is provided with a locking tongue 4. The locking tongue 4 is used to cooperate with the steel ball 3 to prevent the steel ball 3 from disengaging from the ball pocket 2. In this embodiment, the locking tongue 4 is arranged on the top surface of the part of the frame body 1 located between adjacent ball pockets 2. Along the axial direction of the frame body 1, the locking tongue 4 is inclined and extends towards the inner side of the ball pocket 2 so that the locking tongue 4 locks the steel ball 3 inside the ball pocket 2.

[0030] In this embodiment, only one side of the top of the ball pocket 2 is provided with the locking tongue 4, so that in the frame body, only one locking tongue 4 needs to be accommodated in the part between adjacent ball pockets 2, which can minimize the volume of the part between adjacent ball pockets 2 in the frame body 1. Compared with the structure of the traditional bearing cage, with the same-sized frame body 1, after the volume of the part between adjacent ball pockets 2 is reduced, the number of ball pockets 2 that can be set in the entire frame body 1 can be maximally increased. Furthermore, the number of steel balls 3 between the inner ring and the outer ring of the bearing can be increased, and the load borne by the bearing can be dispersed to more steel balls 3, improving the load-bearing capacity of the entire bearing and thus the applicability of the bearing.

[0031] Specifically, the frame body 1 is provided with a plurality of equally spaced ball pockets 2 along the circumferential direction. In this embodiment, the specifications of the cage are PCD284mm, the outer diameter of the cage is 298mm, the ball diameter of the steel ball 3 is 25.4mm, and the spacing between adjacent ball pockets 2 is reduced to increase the number of ball pockets 2. The number of ball pockets 2 is 30 - 35, preferably 32. It can be understood that those skilled in the art can set the number of ball pockets 2 according to the size of the ball pockets 2 and the size of the frame body, and details are not described herein.

[0032] The inner surface of the ball pocket 2 is a spherical surface matched with the steel ball 3, which can completely fit the steel ball 3 and improve the locking ability of the steel ball 3.

[0033] The locking tongue 4 adopts an arc structure matched with the steel ball 3 and extends towards the inner side of the ball pocket 2. The inner side surface of the locking tongue 4 for cooperating with the steel 3 also adopts a spherical surface matched with the steel ball 3, which can completely fit the steel ball 3 and improve the locking ability of the steel ball 3. The outer side surface of the locking tongue 4 adopts a spherical surface matched with the inner side surface, and the outer side surface and the inner side surface of the locking tongue 4 are arranged in parallel.

[0034] In other embodiments, the outer side surface of the locking tongue 4 can also adopt a plane or other types of surfaces. In this embodiment, no requirements are made for the shape of the outer side surface of the locking tongue 4, as long as the inner side surface of the locking tongue can cooperate with the steel ball.

[0035] In this embodiment, since the inner surface of the ball pocket 2 adopts a spherical surface matching the steel ball 3, the frame body 1 between adjacent ball pockets 2 has a structure that is thin in the middle and thick on both sides. Moreover, the thickness of the outer part of the frame body between adjacent ball pockets 2 is greater than that of the inner part. With this setting, the opening size of the outer open end of the ball pocket is smaller than that of the inner open end.

[0036] When the bearing is working, due to rotation, under the action of centrifugal force, the steel ball 3 has a tendency to move outward. Therefore, setting the ball pocket 2 such that the opening size of the outer open end is smaller than that of the inner open end can enable the ball pocket 2 to better prevent the steel ball 3 from moving outward, improving the self-locking ability of the ball pocket 2 for the steel ball 3.

[0037] At the same time, the connection surface of the lock tongue 4 and the frame body 1 is arranged along the top edge of the ball pocket 2, that is, the inner edge of the connection surface of the lock tongue 4 and the frame body 1 coincides with one side top edge of the ball pocket 2. Therefore, the inner surface of the lock tongue 4 and the inner surface of the ball pocket 2 form a complete spherical surface matching the steel ball 3.

[0038] The thickness of the lock tongue 4 is less than the thickness at the position of the minimum thickness of the top surface of the part between adjacent ball pockets 2 in the frame body 1. The overall length of the lock tongue 4 meets the requirement of preventing the steel ball 3 from detaching from the ball pocket 2. The overall length of the lock tongue 4 can be set according to actual needs and will not be described in detail here. Since the connection surface of the lock tongue 4 and the frame body 1 is distributed along the top surface of the ball pocket 2, the lock tongue 4 is also inclined relative to the radial direction of the frame body 1, and the inclination direction enables the lock tongue 4 to better prevent the steel ball 3 from moving outward due to centrifugal force.

[0039] By setting the ball pocket 2 such that the opening size of the outer open end is smaller than that of the inner open end and combining with the setting method of the lock tongue 4, the ball pocket 2 and the lock tongue 4 can better prevent the steel ball 3 from moving outward due to centrifugal force, ensuring the self-locking ability of the lock tongue 4 and the ball pocket 2 for the steel ball 3, avoiding the deformation of the lock tongue 4 and the ball pocket 3 caused by the large centrifugal force of the steel ball 3, and further preventing the phenomenon that the steel ball 3 detaches from the ball pocket 2. Compared with the double-sided lock tongue, it makes up for the problem of the reduction in self-locking ability caused by each ball pocket 2 of the cage lacking one lock tongue 4. The steel ball 3 and the cage can still stably lock the steel ball 3 inside the ball pocket 2 under the condition of high-speed rotation, enabling the entire bearing to be applied to high-speed rotation working conditions and improving the applicability of the entire bearing.

[0040] In other embodiments, the inner surface of the ball pocket 2 may also adopt a V-shaped surface that matches the steel ball 3, which is composed of two intersecting planes distributed along an arc trajectory. Correspondingly, the inner side surface of the locking tongue 4 for cooperating with the steel ball 3 also adopts a V-shaped surface that matches the steel ball 3. When adopting this setting method, the ball pocket 2 and the locking tongue 4 do not completely fit with the steel ball 3, reducing the contact area between the ball pocket 2 and the locking tongue 4 and the steel ball 3, thereby reducing the friction force. At the same time, it is more convenient to lubricate between the steel ball 3 and the inner and outer rings of the bearing.

[0041] Furthermore, a groove 5 is provided at the central position of the bottom of the inner surface of the ball pocket 2. The groove 5 is a circular groove, and the circular groove serves as a process hole, facilitating the demolding during the production of the cage. At the same time, the circular groove also serves as a storage space for lubricating oil, facilitating the lubrication of the entire bearing.

[0042] Furthermore, in order to achieve the lightweight design of the cage, in one embodiment, the locking tongue 4 is provided on the top surface of the cage body 1, and a weight-reducing groove is provided on the bottom surface of the cage body 1. The weight-reducing groove is distributed along the circumferential direction of the cage body 1. The weight-reducing groove can be a whole annular groove, or multiple weight-reducing grooves are provided, and the multiple weight-reducing grooves are equally spaced along the circumferential direction of the cage body 1. The shape of the weight-reducing groove can be set according to actual needs and will not be described in detail here.

[0043] In another embodiment, the cage body 1 includes an inner ring 1-1 and an outer ring 1-2 arranged coaxially. A plurality of ball pockets 2 are equally spaced along the circumferential direction between the inner ring 1-1 and the outer ring 1-2. The two end faces of the ball pocket 2 are integrally connected to the inner ring 1-1 and the outer ring 1-2. A connecting body 1-3 is provided between adjacent two ball pockets 2. The connecting body 1-3 is integrally connected to the ball pocket 2, the inner ring 1-1, and the outer ring 1-2. The top surface of the connecting body 1-3 is flush with the top surfaces of the ball pocket 2, the inner ring 1-1, and the outer ring 1-2. The locking tongue 4 is integrally provided on the top surface of the connecting body 1-3.

[0044] When adopting this method, the space between the inner ring 1-1 and the outer ring 1-2 except for the connecting body 1-3 and the ball pocket 2 is a hollow structure, reducing the weight of the entire cage.

[0045] In this embodiment, the cage body 1, the ball pocket 2, and the locking tongue 4 are all integrally connected and made of PA66-GF30 material. During processing, integral injection molding is adopted, which is convenient and fast. It can be understood that the cage can also be made of other materials, and those skilled in the art can choose according to actual needs and will not be described in detail here.

[0046] The cage of this embodiment can accommodate more steel balls 3, thereby improving the load-bearing capacity of the bearing. At the same time, it has a good locking ability for the steel balls 3, meeting the usage requirements of the bearing under high-speed rotation conditions, and further improving the applicability of the bearing.

[0047] Embodiment 2

[0048] This embodiment provides a deep groove ball bearing cage, including a cage body. Compared with Embodiment 1, two rows of ball pockets are provided on the cage body, that is, ball pockets are provided on both the top surface and the bottom surface of the cage body. At this time, the entire cage can accommodate two rows of steel balls, and in the two rows of ball pockets, the ball pockets are arranged staggeredly.

[0049] A locking tongue is provided on one side of the top of one row of ball pockets, and a locking tongue is provided on one side of the top of the other row of ball pockets, that is, locking tongues are provided on both the top surface and the bottom surface of the cage body. The setting method of the locking tongue is the same as that in Embodiment 1 and will not be described in detail here.

[0050] At this time, the entire cage can accommodate two rows of steel balls. Compared with Embodiment 1, the number of ball pockets doubles, and thus the number of steel balls doubles, further improving the load-bearing capacity of the entire bearing and the applicability of the bearing.

[0051] Embodiment 3

[0052] This embodiment provides a deep groove ball bearing cage. Compared with Embodiment 1, as Figure 4 shown, a thickness-reducing groove 6 is further provided on the outer arc surface of the locking tongue 4 to reduce the thickness of the locking tongue. By adopting this method, it is convenient for the assembly of the steel balls, and at the same time, it has a large deformation space when being impacted, is not easily damaged, and can also reduce the friction between the locking tongue and the steel balls.

[0053] Embodiment 4

[0054] This embodiment provides a bearing, which is a deep groove ball bearing, including the deep groove ball bearing cage described in Embodiment 1 or Embodiment 2 or Embodiment 3. Steel balls 3 are accommodated in the ball pockets 2 of the deep groove ball bearing cage, and the inner surface of the locking tongue 4 is in contact with the steel balls 3. The self-locking of the steel balls 3 is realized through the ball pockets 2 and the locking tongue 4. The bearing further includes an inner ring and an outer ring, and the inner ring and the outer ring are coaxially arranged. The steel balls 3 cooperate with the inner ring and the outer ring. The cooperation mode of the inner ring, the outer ring, the steel balls 3 and the cage can adopt the existing technology and will not be described in detail here.

[0055] In this embodiment, due to the adoption of the design method of a single-sided locking tongue, the cage 1 can be provided with more ball pockets 2, and thus the entire cage can accommodate more steel balls 3. When the bearing bears a load, the load can be transmitted to more steel balls 3, so that the load can be more evenly distributed and dispersed, and no higher local stress will be generated on the inner ring and the outer ring, avoiding local damage and deformation of the inner ring and the outer ring, improving the load-bearing capacity of the entire bearing, and improving the applicability of the entire bearing.

[0056] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A deep groove ball bearing retainer, comprising a ring-shaped frame body, wherein the ring-shaped frame body is provided with a plurality of ball pockets matching with steel balls and used to accommodate steel balls along the circumferential direction, characterized in that: A locking tongue is provided on one side of the top of the ball pocket, and the locking tongue is fixed on the top surface of the frame between two adjacent pocket holes. The locking tongue adopts an arc structure matching the steel ball and extends toward the inside of the ball pocket.

2. A deep groove ball bearing cage according to claim 1, characterized in that: The inner side surface of the lock tongue used for cooperating with the steel ball adopts a spherical surface matching the steel ball.

3. A deep groove ball bearing cage as claimed in claim 2, characterized in that: The inner side surface of the ball pocket is a spherical surface matching the steel ball.

4. A deep groove ball bearing cage as claimed in claim 3, characterized in that: The inner edge of the connection portion between the locking tongue and the frame body overlaps with the top edge of the ball pocket so that the inner side surface of the locking tongue and the inner side surface of the ball pocket are located on the same spherical surface matching the steel ball.

5. A deep groove ball bearing cage according to claim 1, characterized in that: In the frame, the thickness of the outer side portion between adjacent pocket holes is greater than the thickness of the inner side portion so that the outer side opening size of the ball pocket is smaller than the inner side opening size of the ball pocket.

6. A deep groove ball bearing cage according to claim 1, characterized in that: A groove is arranged at the center of the bottom surface of the ball pocket.

7. A deep groove ball bearing cage according to claim 1, characterized in that: The number of the ball pockets is 30-35, preferably 32.

8. A deep groove ball bearing cage as claimed in claim 1, characterized in that: The top surface of the frame body is provided with a locking tongue, and the bottom surface of the frame body is provided with a weight-reducing groove to reduce the weight of the entire retaining frame.

9. A deep groove ball bearing cage according to claim 1, characterized in that: The frame includes an outer ring and an inner ring, a plurality of ball pockets distributed along the circumferential direction are arranged between the inner ring and the outer ring, a connector located between the inner ring and the outer ring is arranged between adjacent ball pockets, and the locking tongue is arranged on the top surface of the connector.

10. A bearing, characterized in that: A deep groove ball bearing retainer as claimed in any one of claims 1 to 9 is provided.

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