Solid retainer suitable for connecting shaft angular contact ball bearing

Abstract

The invention relates to the technical field of bearing parts, and discloses a solid retainer suitable for a connecting shaft angular contact ball bearing, an inner ring is coaxially arranged in an outer ring, a retainer is arranged between the inner ring and the outer ring, pockets are formed in the outer wall of the retainer at equal intervals, and matched rolling bodies are arranged in the pockets. Rolling notches are formed in the outer wall of the inner ring and the inner wall of the outer ring, and the rolling bodies are in rolling fit with the notches. The retainer is made of a polyamide-imide high polymer material containing a graphite component, has excellent heat resistance and low temperature resistance and can stably operate at the temperature of 280 DEG C, and the problem that in the prior art, engineering plastics are insufficient in lubricating performance at the high temperature is solved. Due to the fact that the material contains PTFE and graphite components, the retainer has good abrasion resistance, low friction coefficient and self-lubrication performance, abrasion is reduced, and therefore the service life of the bearing is prolonged. The connecting shaft angular contact ball bearing is suitable for various connecting shaft angular contact ball bearings needing high precision, high stability and high load capacity, and has wide application prospects and market value.

Description

Technical Field

[0001] The invention relates to the technical field of bearing parts, in particular to a solid retaining frame suitable for a coupling angular contact ball bearing. Background Art

[0002] Compared with single-row angular contact ball bearings, coupling angular contact ball bearings have the advantages of occupying less axial space, being able to withstand radial loads and axial loads acting in two directions, and therefore having better bearing rigidity. The design of this bearing makes it more stable when bearing loads, and is particularly suitable for applications where space is limited. However, the cages of coupling angular contact ball bearings are currently mainly made of engineering plastics such as bakelite and nylon, which have insufficient lubrication performance under high temperature conditions and are prone to premature wear of the bearings. In addition, due to the limitations of the plastic material, the rolling elements cannot be fixed on the rings alone during assembly, which can easily cause loosening and assembly difficulties.

[0003] In the prior art, for example, the Chinese patent application number 200420075448.1 and the publication number CN2793413Y discloses a separation type angular contact ball bearing cage with a ball locking structure. The cage is equipped with a retaining rib and a groove. The aperture of the retaining rib is slightly smaller than the outer diameter of the rolling element, and the bottom diameter of the groove is also slightly smaller than the outer diameter of the rolling element. The rolling element is pressed into the retaining rib pocket through the notch of the retaining rib. The retaining rib and the rolling element form a component, which will not fall apart when the inner and outer rings of the bearing are separated; the contact point position and contact area between the rolling element and the retaining rib pocket are also reduced; and the displacement of the retaining rib is limited. However, in actual use, the above technical solution has the following defects: during the assembly process, the rolling element is easily scratched, which may shorten the service life of the bearing.

[0004] In addition, the existing coupling angular contact ball bearing cages are mainly made of engineering plastics such as bakelite and nylon, which have insufficient lubrication performance under high temperature conditions; most of the existing coupling angular contact ball bearings are solid cages, and the rolling elements cannot be placed separately on the inner ring or outer ring raceway during assembly, which is prone to loosening and there is a problem of difficulty in assembly; most of the existing coupling angular contact ball bearings are straight pocket solid cages, and the gap between the inner ring rib and the cage pocket in the inner ring separation structure is too large, which can easily cause unstable bearing operation, which not only affects the performance of the bearing, but may also increase maintenance costs and reduce equipment reliability.

[0005] Therefore, based on the above technical problems, it is necessary for technicians in this field to develop a solid retainer suitable for shaft-connected angular contact ball bearings. Summary of the invention

[0006] The object of the present invention is to provide a solid retainer suitable for a coupling angular contact ball bearing to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: A technical solution for a solid cage suitable for a coupling angular contact ball bearing, comprising an outer ring, an inner ring coaxially arranged inside the outer ring, a cage arranged between the outer ring and the inner ring, a plurality of cage pockets equidistantly distributed in a circle on the outer wall of the cage, a plurality of rolling bodies adapted thereto arranged in the plurality of cage pockets, inner ring outer wall rolling recesses and outer ring inner wall rolling recesses are respectively arranged on the inner ring outer wall and the outer ring inner wall on both sides of the rolling body, the rolling body rollingly cooperates with the inner ring outer wall rolling recesses and the outer ring inner wall rolling recesses.

[0008] As a preferred technical solution, the retaining frame is made of polyamide-imide polymer material containing graphite components and has self-lubricating properties, so that the bearing can operate stably at an operating temperature of up to 280°C, thereby extending the service life of the bearing.

[0009] As a preferred technical solution, a cage inner diameter opening is provided through the top of the cage, and a cage step is provided on the cage inner diameter opening.

[0010] As a preferred technical solution, a cage locking opening is provided between each cage pocket and the cage inner diameter opening, the cage locking opening is semicircular and has a smooth transition with the cage step.

[0011] As a preferred technical solution, the inner diameter opening of the retaining frame adopts a straight pocket hole design, which is convenient for processing and installation of rolling elements and avoids scratches on the rolling elements.

[0012] As a preferred technical solution, the retainer lock is used to limit the rolling body installed in the retainer pocket, restrict the radial movement of the rolling body, so that it can be accurately placed on the rolling recess on the inner wall of the outer ring or the rolling recess on the outer wall of the inner ring, so that the retainer can be fixed separately to the rolling recess on the inner wall of the outer ring or the rolling recess on the outer wall of the inner ring, and is not easy to fall apart.

[0013] As a preferred technical solution, the inner diameter of the cage pocket is larger than the diameter of the rolling body, which facilitates the installation of the rolling body and ensures the surface quality of the rolling body when it moves.

[0014] As a preferred technical solution, the cage step, the cage inner diameter opening and the cage are concentrically arranged to improve the cage operation stability.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention is a solid cage suitable for a coupling angular contact ball bearing. The cage is made of a polyamide-imide polymer material containing graphite, has excellent heat resistance and low temperature resistance, can operate stably at a temperature of up to 280°C, and solves the problem of insufficient lubrication performance of engineering plastics at high temperatures in the prior art. Extended service life: Since the material contains PTFE and graphite, the cage has good wear resistance, low friction coefficient and self-lubrication, reduces wear, and thus extends the service life of the bearing.

[0016] The cage design uses ball guidance and straight pockets to ensure a stable spacing distance between rolling elements when the bearing rotates, reduce disturbances when the system is unstable, prevent destructive sliding, and improve rolling conditions.

[0017] The inner hole of the cage adopts a step structure, which reduces the unstable vibration caused by the excessive gap between the inner ring and the inner hole of the cage, provides good stability and heat dissipation space for the bearing, and increases the overall strength of the polymer material cage.

[0018] A lock is provided at the intersection of the cage pocket and the inner hole step, so that the bearing rolling element is locked by the lock during assembly. The cage and the rolling element can be fixed to one side of the raceway without tooling, avoiding the problem of loose fitting during assembly or installation, simplifying the assembly process and improving assembly accuracy.

[0019] The lock mouth is semicircular in design and has a smooth transition with the step, which ensures the stability of the bearing during operation and avoids the degradation of bearing performance due to improper assembly.

[0020] The inner diameter of the cage adopts a straight pocket design, which is convenient for processing and installation of rolling elements, while avoiding scratches on the rolling elements during installation, thus improving production efficiency and product quality.

[0021] The present invention can effectively solve the problems of insufficient lubrication performance, difficult assembly, unstable operation, etc. of the existing coupling angular contact ball bearing retainer under high temperature conditions. It has the advantages of simple structure, reasonable design, easy processing and manufacturing, and long service life. It is suitable for various coupling angular contact ball bearings requiring high precision, high stability, and high load capacity, and has broad application prospects and market value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a solid cage suitable for a coupling angular contact ball bearing; Figure 2 A schematic diagram of a cage structure of a solid cage suitable for a coupling angular contact ball bearing; Figure 3 The present invention is a schematic diagram of a top view structure of a solid cage suitable for a coupling angular contact ball bearing.

[0023] In the accompanying drawings: 1, outer ring; 101, rolling notch on the inner wall of the outer ring; 2, inner ring; 201, rolling notch on the outer wall of the inner ring; 3, retaining frame; 301, retaining frame inner diameter opening; 302, retaining frame step; 303, retaining frame pocket; 304, retaining frame lock; 4, rolling element. DETAILED DESCRIPTION

[0024] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by illustrating examples of the present invention.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides a technical solution for a solid cage suitable for a shaft-connected angular contact ball bearing: comprising an outer ring 1 and an inner ring 2, wherein the inner ring 2 is coaxially arranged inside the outer ring 1. A cage 3 is arranged between the outer ring 1 and the inner ring 2, the outer wall of the cage 3 is circumferential, and a plurality of cage pockets 303 are arranged at equal intervals. A rolling body 4 adapted thereto is arranged in each cage pocket 303. In addition, inner ring outer wall rolling recesses 201 and outer ring inner wall rolling recesses 101 are respectively arranged on the inner ring outer wall 201 and the outer ring inner wall 101 on both sides of the rolling body 4, and the rolling body 4 is rolling-matched with the inner ring outer wall rolling recesses 201 and the outer ring inner wall rolling recesses 101.

[0026] The cage 3 is made of polyamide-imide polymer material containing graphite, which has self-lubricating properties. Therefore, the bearing can operate stably at an operating temperature of up to 280°C, which significantly extends the service life of the bearing.

[0027] In addition, a cage inner diameter opening 301 is provided through the top of the cage 3, and the cage inner diameter opening 301 is provided with a cage step 302. The cage inner diameter opening 301 adopts a straight pocket hole design, which is convenient for processing and installation of the rolling element 4, and prevents the rolling element 4 from being scratched during installation.

[0028] A cage lock 304 is provided between the cage pocket 303 and the cage inner diameter opening 301. The cage lock 304 is semicircular and smoothly transitions with the cage step 302. The cage lock 304 is used to limit the rolling body 4 installed in the cage pocket 303, restrict the radial movement of the rolling body 4, and enable it to be accurately placed on the rolling recess 101 on the inner wall of the outer ring or the rolling recess 201 on the outer wall of the inner ring, so that the cage 3 can be fixed alone on the rolling recess 101 on the inner wall of the outer ring or the rolling recess 201 on the outer wall of the inner ring, and it is not easy to fall apart.

[0029] In order to facilitate the installation of the rolling body 4 and ensure the surface quality of the rolling body 4 when it moves, the inner diameter of each cage pocket 303 is designed to be larger than the diameter of the rolling body 4 .

[0030] In order to improve the running stability of the retainer 3 , the retainer step 302 , the retainer inner diameter opening 301 and the retainer 3 are arranged concentrically.

[0031] The solid retainer of the present invention can effectively solve the problems of insufficient lubrication performance, difficult assembly, unstable operation, etc. of the existing coupling angular contact ball bearing retainer under high temperature conditions. It has the advantages of simple structure, reasonable design, easy processing and manufacturing, and long service life. It is suitable for various coupling angular contact ball bearings requiring high precision, high stability, and high load capacity, and has broad application prospects and market value.

[0032] According to the above scheme, in this embodiment, after the outer ring 1, the inner ring 2 and the retainer 3 are assembled, the rolling element 4 is placed in the retainer pocket 303 and is limited by the retainer lock 304. When the bearing starts to run, the rolling element 4 rolls between the rolling recess 201 on the outer wall of the inner ring and the rolling recess 101 on the inner wall of the outer ring to realize the rotation of the bearing. Since the retainer 3 is made of a polyamide-imide polymer material containing graphite components, it has good self-lubricating properties and can operate stably at a working temperature of up to 280°C, effectively solving the problem of insufficient lubrication performance of engineering plastics at high temperatures in the prior art. At the same time, the concentric arrangement of the retainer step 302, the retainer inner diameter opening 301 and the retainer 3, and the semicircular design and smooth transition of the retainer lock 304, all further improve the operating stability and assembly accuracy of the bearing. In addition, the design that the inner diameter of the retainer pocket 303 is larger than the diameter of the rolling element 4 also facilitates the installation of the rolling element 4 and ensures the surface quality of the rolling element 4 when it moves.

[0033] The solid cage of the present invention has the advantages of simple structure, reasonable design, easy processing and manufacturing, long service life, etc. It is suitable for various shaft angular contact ball bearings requiring high precision, high stability and high load capacity, and has broad application prospects and market value.

[0034] The working principle and use process of the present invention: After assembling the various components of the present solution in sequence, all the working steps can be completed by working in accordance with the above implementation methods in sequence according to actual needs.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0036] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation on the present invention.

[0037] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0038] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solid retainer suitable for a coupling angular contact ball bearing, characterized in that: The invention comprises an outer ring (1), wherein an inner ring (2) is coaxially arranged inside the outer ring (1), and is characterized in that a retaining frame (3) is arranged between the outer ring (1) and the inner ring (2), and the outer wall of the retaining frame (3) is provided with a plurality of retaining frame pockets (303) distributed at equal intervals in a circumferential shape, and a rolling body (4) matched therewith is arranged in each of the plurality of retaining frame pockets (303), and inner ring outer wall rolling recesses (201) and outer ring inner wall rolling recesses (101) are respectively arranged on the outer wall of the inner ring (2) and the inner wall of the outer ring (1) on both sides of the rolling body (4), and the rolling body (4) is rollingly matched with the inner ring outer wall rolling recesses (201) and the outer ring inner wall rolling recesses (101).

2. A solid retainer suitable for a coupling angular contact ball bearing according to claim 1, characterized in that: The retaining frame (3) is made of a polyamide-imide polymer material containing graphite components and has a self-lubricating property, so that the bearing can operate stably at an operating temperature of up to 280° C., thereby extending the service life of the bearing.

3. A solid retainer suitable for a coupling angular contact ball bearing according to claim 1, characterized in that: The top of the retainer (3) is provided with a retainer inner diameter opening (301) extending therethrough, and the retainer inner diameter opening (301) is provided with a retainer step (302).

4. A solid retainer suitable for a coupling angular contact ball bearing according to claim 3, characterized in that: A retainer locking opening (304) is provided between each retainer pocket (303) and the retainer inner diameter opening (301); the retainer locking opening (304) is semicircular in shape and has a smooth transition with the retainer step (302).

5. A solid retainer suitable for a coupling angular contact ball bearing according to claim 4, characterized in that: The inner diameter opening (301) of the retaining frame adopts a straight pocket hole design, which is convenient for processing and installation of the rolling body (4), and at the same time, avoids scratches on the rolling body (4).

6. A solid retainer suitable for a coupling angular contact ball bearing according to claim 5, characterized in that: The cage lock (304) is used to limit the position of the rolling body (4) installed in the cage pocket (303), restricting the radial movement of the rolling body (4) so ​​that it can be accurately placed on the outer ring inner wall rolling recess (101) or the inner ring outer wall rolling recess (201), so that the cage (3) can be fixed separately to the outer ring inner wall rolling recess (101) or the inner ring outer wall rolling recess (201) and is not easy to fall apart.

7. The solid retainer suitable for a coupling angular contact ball bearing according to claim 1, characterized in that: The inner diameter of the cage pocket (303) is greater than the diameter of the rolling body (4), which facilitates the installation of the rolling body (4) and ensures the surface quality of the rolling body (4) when it moves.

8. The solid retainer suitable for a coupling angular contact ball bearing according to claim 1, characterized in that: The retainer step (302), the retainer inner diameter opening (301) and the retainer (3) are arranged concentrically, thereby improving the operating stability of the retainer (3).

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