A special cage for super-high speed angular contact bearings

Abstract

The present invention discloses a special cage for a super-high-speed angular contact bearing. The bearing cage mainly consists of an outer ring and an inner ring to form a main structure, and the outer ring and the inner ring are injection-molded and fixed into an integral structure. It includes: pocket holes, which are equidistantly and circumferentially formed inside the sides of the outer ring and the inner ring; chamfers, which are formed on the sides of the outer ring and the inner ring, and the chamfers are used to improve the deformation amount caused by material shrinkage during injection molding of the outer ring and the inner ring; outer transition fillets, which are formed on both sides of the pocket holes provided on the inner side of the outer ring; inner transition fillets, which are formed on both sides of the pocket holes provided on the inner side of the inner ring. This special cage for a super-high-speed angular contact bearing adopts a new structural design, which optimizes the pocket hole structure of the cage, enables the rolling elements to have a certain amount of play in the pocket holes during rotation, has a relatively high rotation flexibility, and a strength reinforcement structure is provided in the cage to improve the service effect of the cage during high-speed operation of the bearing.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and particularly to a special cage for super-high-speed angular contact bearings. Background Art

[0002] The main structure of a rolling bearing body is mainly composed of an inner ring, an outer ring, rolling elements and a cage. The cage is used to define the installation position of the rolling elements and ensure the normal rotation of the rolling elements during the bearing transmission. The rolling elements are installed inside the pockets of the cage. The bearing cage mainly plays the roles of evenly distributing and guiding the rolling elements, storing grease, and maintaining the smooth operation of the bearing. However, in the field of super-high-speed bearings, the cage has always been the main problem affecting the operation quality of the bearings.

[0003] The structure and quality of the cage directly affect the vibration, noise, heat generation and service life of the bearing during operation. The traditional cages for super-high-speed bearings are mainly made of bakelite structures. Due to unstable factors, problems such as abnormal noise, large vibration and deformation will occur. Moreover, the contact surface between the traditional cage and the rolling elements is relatively fitting, and the rolling elements do not have a certain amount of play in the pockets, resulting in limited rotational flexibility and affecting the transmission effect of the bearing.

[0004] Therefore, it is necessary to design a special cage for super-high-speed angular contact bearings to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a special cage for super-high-speed angular contact bearings to solve the problems raised in the above background art that the structure and quality of the cage directly affect the vibration, noise, heat generation and service life of the bearing during operation. The traditional cages for super-high-speed bearings are mainly made of bakelite structures. Due to unstable factors, problems such as abnormal noise and large vibration will occur. Moreover, the contact surface between the traditional cage and the rolling elements is relatively fitting, and the rolling elements do not have a certain amount of play in the pockets, resulting in limited rotational flexibility and affecting the transmission effect of the bearing.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A special cage for super-high-speed angular contact bearings, the bearing cage mainly consists of an outer ring and an inner ring to form a main structure, and the outer ring and the inner ring are injection-molded and fixed into an integrated structure;

[0007] A special cage for super-high-speed angular contact bearings, comprising:

[0008] Pockets, which are equidistantly and circumferentially opened inside the sides of the outer ring and the inner ring, and smooth curved surfaces are provided on both sides of the pockets;

[0009] Oblique angles, which are opened on the sides of the outer ring and the inner ring, and the oblique angles are used to improve the deformation amount caused by material shrinkage during the injection molding of the outer ring and the inner ring;

[0010] An external transition fillet is provided on both sides of the pocket holes arranged inside the outer ring, and external locking ball points are provided on the side surfaces of the pocket holes arranged inside the outer ring.

[0011] An internal transition fillet is provided on both sides of the pocket holes arranged inside the inner ring, and internal locking ball points are provided on the side surfaces of the pocket holes arranged inside the inner ring.

[0012] Preferably, the outer ring and the inner ring are fixedly attached, and the positions of the pocket holes provided on the side surfaces of the outer ring and the inner ring communicate with each other correspondingly. The inner ring and the outer ring are made of PEEK material, and the PEEK material has the advantages of high strength, wear resistance, self-lubrication, high temperature resistance, and high dimensional stability.

[0013] Preferably, the cut surface and the external locking ball points are smoothly connected and arranged on both sides of the pocket holes in the outer ring, and the cut surface and the internal locking ball points are smoothly connected and arranged on both sides of the pocket holes in the inner ring. The cut surfaces, external locking ball points, and internal locking ball points provided in the pocket holes enable the rolling elements to have a certain amount of end play during rotation, and the bearing rotates relatively flexibly.

[0014] Preferably, a rolling element for controlling the rotational connection of the bearing is rotatably arranged through the interior of the pocket hole, and a smooth structure of the cut surface enables the rolling element to be in smooth contact with the outer ring and the inner ring. The pocket holes with special-shaped structures can keep the rolling elements rotating relatively flexibly.

[0015] Preferably, a reinforcement groove and external heat dissipation holes are further provided on the inner side of the outer ring:

[0016] The reinforcement groove is provided in the interior of the outer ring at equal angles, and adjustment grooves are symmetrically provided on the left and right sides of the reinforcement groove.

[0017] The external heat dissipation holes are provided on the side surface of the outer ring, and the external heat dissipation holes communicate with the reinforcement groove. At the same time, a metal reinforcement block is clamped and arranged inside the reinforcement groove.

[0018] Preferably, elastic metal sheets and internal heat dissipation holes are further provided on the inner and outer sides of the metal reinforcement block:

[0019] The elastic metal sheets are fixedly attached and installed on the left and right sides of the metal reinforcement block, and a heat collecting groove is provided inside the metal reinforcement block.

[0020] The internal heat dissipation holes are provided at the middle position on the front side of the metal reinforcement block, and a rubber buffer pad is fixedly clamped and arranged on the outer side surface of the metal reinforcement block.

[0021] Preferably, the metal reinforcement block forms a dismountable structure with the outer ring through a reinforcement groove, and the front side of the metal reinforcement block is extrusion-fitted inside the reinforcement groove through a rubber buffer pad. At the same time, the left and right sides of the metal reinforcement block are respectively elastically extrusion-fitted inside the adjustment groove through elastic metal sheets. Clamping the metal reinforcement block between the outer ring and the inner ring can improve the overall strength and stability of the cage, and avoid the deformation of the cage when the bearing rotates at a high speed.

[0022] Preferably, the outer heat dissipation holes are equidistantly arranged on the side surface of the outer ring, and the positions and sizes of the outer heat dissipation holes arranged in the outer ring correspond to those of the inner heat dissipation holes arranged in the metal reinforcement block. The settings of the outer heat dissipation holes and the inner heat dissipation holes can enable the cage to quickly dissipate heat outward during the rotation of the bearing, and reduce the operating temperature of the cage when the bearing rotates at a high speed.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: The special cage for the ultra-high-speed angular contact bearing adopts a new structural design, enabling the device to fix the outer ring and the inner ring by inserting them in an injection molding form. By improving the shape of the pocket and optimizing the details of the pocket, the lubrication performance of the bearing is improved, the rotational stability is enhanced, the temperature rise and noise are reduced, and a reinforcement and heat dissipation structure is provided in the cage, which can further improve the service effect of the cage;

[0024] 1. The main structure of the cage, the outer ring and the inner ring, are made of PEEK material. The PEEK material has the advantages of high strength, wear resistance, self-lubrication, high temperature resistance and high dimensional stability. It is more practical than the cage set with the traditional rubber wood structure. At the same time, the outer ring and the inner ring are correspondingly provided with pocket structures. The inner side of the pocket is smoothly provided with a cut surface, an outer transition fillet, an outer ball locking point, an inner transition fillet, an inner ball locking point, etc. It improves the structure of the contact between the pocket and the rolling element, enabling the rolling element to have a certain amount of play when rotating in the pocket, and the rolling element has strong rotational flexibility;

[0025] 2. A metal reinforcement block structure is inserted at the connection between the outer ring and the inner ring. The metal reinforcement block has strong strength, which can increase the overall strength of the cage during use and avoid the deformation of the cage affected by use factors. At the same time, an elastic metal sheet structure is arranged on the outside of the metal reinforcement block, which can absorb the heat generated by the cage when the rolling element rotates when it fits against the inner side of the outer ring. The heat is transferred to the inside of the metal fixing block and discharged outward through the corresponding inner heat dissipation holes and outer heat dissipation holes, reducing the temperature of the cage during use and improving its service effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic elevational view of the present invention;

[0027] Figure 2 is a schematic side view of the present invention;

[0028] Figure 3 This is a schematic top view structure diagram of the rolling elements of the present invention;

[0029] Figure 4 This is a schematic front view structure diagram of the pocket of the present invention;

[0030] Figure 5 This is a schematic top view structure diagram of the outer ring of the present invention;

[0031] Figure 6 This is the present invention Figure 5 The enlarged structure diagram at position A in;

[0032] Figure 7 This is a schematic top view structure diagram of the elastic metal sheet of the present invention;

[0033] Figure 8 This is a schematic side view structure diagram of the elastic metal sheet of the present invention.

[0034] In the figure: 1. Outer ring; 101. Outer transition fillet; 102. Outer ball locking point; 2. Inner ring; 201. Inner transition fillet; 202. Inner ball locking point; 3. Pocket; 4. Cutting plane; 5. Oblique angle; 6. Reinforcement groove; 7. Adjustment groove; 8. Outer heat discharge hole; 9. Metal reinforcement block; 901. Elastic metal sheet; 902. Heat collection groove; 903. Inner heat discharge hole; 904. Rubber buffer pad; 10. Rolling element. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figures 1-8 , the present invention provides a technical solution: a special cage for a super-high-speed angular contact bearing. The bearing cage mainly consists of an outer ring 1 and an inner ring 2 to form a main structure, and the outer ring 1 and the inner ring 2 are injection-molded and fixed into an integrated structure;

[0037] A special cage for a super-high-speed angular contact bearing, comprising:

[0038] Pockets 3, which are equidistantly and circumferentially opened inside the sides of the outer ring 1 and the inner ring 2, and cutting planes 4 are provided on both sides of the pockets 3. The cutting planes 4 are smooth curved surface structures;

[0039] Oblique angles 5, which are opened on the sides of the outer ring 1 and the inner ring 2, and the oblique angles 5 are used to improve the deformation amount caused by the material shrinkage during the injection molding of the outer ring 1 and the inner ring 2;

[0040] An outer transition fillet 101 is provided on both sides of the pocket hole 3 provided inside the outer ring 1, and an outer locking ball point 102 is provided on the side of the pocket hole 3 opened inside the outer ring 1;

[0041] An inner transition fillet 201 is provided on both sides of the pocket hole 3 provided inside the inner ring 2, and an inner locking ball point 202 is provided on the side of the pocket hole 3 opened inside the inner ring 2.

[0042] In this example, the outer ring 1 and the inner ring 2 are fitted and fixed, and the positions of the pocket holes 3 opened on the sides of the outer ring 1 and the inner ring 2 correspond to each other and are connected. The inner ring 2 and the outer ring 1 are made of PEEK material; the cutting surface 4 and the outer locking ball point 102 are smoothly connected and provided on both sides of the pocket hole 3 in the outer ring 1, and the cutting surface 4 and the inner locking ball point 202 are smoothly connected and provided on both sides of the pocket hole 3 in the inner ring 2; a rolling body 10 for controlling the rotation of the bearing is rotatably arranged through the inside of the pocket hole 3, and the smooth cutting surface 4 enables the rolling body 10 to be in smooth contact with the outer ring 1 and the inner ring 2.

[0043] The inner ring 2 and the outer ring 1 are made of PEEK material and form a fixed plug-in structure through an injection molding process (the PEEK material has the advantages of high strength, wear resistance, self-lubrication, high temperature resistance, and high dimensional stability, and has better service performance than the cage set with the traditional rubber wood structure). The positions of the pocket holes 3 in the inner ring 2 and the outer ring 1 correspond to each other. The rolling body 10 is arranged inside the pocket hole 3. The cage and the rolling body 10 are installed between the outer and inner rings of the roller. When the bearing rotates, the rolling body 10 rotates inside the pocket hole 3. The outer transition fillet 101, the outer locking ball point 102, the inner transition fillet 201, the inner locking ball point 202, the cutting surface 4, etc. are smoothly connected to the side of the pocket hole 3. This part of the structure forms a pocket hole 3 with a special-shaped structure, enabling the rolling body 10 to have a certain amount of play when rotating inside the pocket hole 3. The rolling body 20 rotates flexibly and does not drop the ball. At the same time, this improved pocket hole 3 structure can improve the lubrication performance of the bearing, enhance the rotation smoothness, reduce the temperature rise and noise.

[0044] On the inner side of the outer ring 1, there are also provided a reinforcing groove 6 and an outer heat discharge hole 8: The reinforcing groove 6 is equally angularly provided inside the outer ring 1, and adjusting grooves 7 are symmetrically provided on the left and right sides of the reinforcing groove 6; The outer heat discharge hole 8 is provided on the side surface of the outer ring 1, and the outer heat discharge hole 8 communicates with the reinforcing groove 6. At the same time, a metal reinforcing block 9 is snap-fitted inside the reinforcing groove 6; On the inner and outer sides of the metal reinforcing block 9, there are also provided elastic metal sheets 901 and inner heat discharge holes 903: The elastic metal sheets 901 are fixedly attached and installed on the left and right sides of the metal reinforcing block 9, and a heat collecting groove 902 is provided inside the metal reinforcing block 9; The inner heat discharge hole 903 is provided at the middle position on the front side of the metal reinforcing block 9, and a rubber buffer pad 904 is fixedly snap-fitted on the outer side surface of the metal reinforcing block 9; The metal reinforcing block 9 and the outer ring 1 form a disassembly and assembly structure through the reinforcing groove 6, and the front side surface of the metal reinforcing block 9 is extruded and attached inside the reinforcing groove 6 through the rubber buffer pad 904. At the same time, the left and right sides of the metal reinforcing block 9 are respectively elastically extruded and attached inside the adjusting groove 7 through the elastic metal sheets 901; The outer heat discharge holes 8 are equally spaced on the side surface of the outer ring 1, and the positions and sizes of the outer heat discharge holes 8 provided in the outer ring 1 correspond to the positions of the inner heat discharge holes 903 provided in the metal reinforcing block 9.

[0045] Insert the metal reinforcing block 9 between the outer ring 1 and the inner ring 2 through the reinforcing groove 6. The front side of the metal reinforcing block 9 is pressed against the inside of the reinforcing groove 6 through the rubber buffer pad 904. After the metal reinforcing block 9 enters the inside of the reinforcing groove 6, the elastic metal sheets 901 provided on both sides of it expand outward under the elastic action, and the elastic metal sheets 901 are pressed and attached inside the adjusting groove 7, strengthening the stability of the metal reinforcing block 9 installed inside the cage. The strength of the metal reinforcing block 9 is greater than that of the PEEK material. Setting it equally angularly inside the cage can improve the strength of the cage in use and avoid the deformation of the cage under the action of high-speed rotation. At the same time, the highly rotating rolling elements 10 generate corresponding heat on the cage, and the heat is distributed inside the cage. The elastic metal sheets 901 absorb part of the heat inside the cage and transfer the heat to the heat collecting groove 902 inside the metal reinforcing block 9. The heat in the heat collecting groove 902 is quickly discharged outward through the inner heat discharge holes 903 and the outer heat discharge holes 8, which can avoid the excessive heat of the cage during use and further improve its performance.

[0046] Working principle: When using this device, first according to Figures 1-8In the structure shown, the outer ring 1 and the inner ring 2 formed by injection molding are inserted and fixed to each other. The rolling elements 10 are arranged in the pocket holes 3 opened inside the outer ring 1 and the inner ring 2. The side of the pocket hole 3 is smoothly connected to the outer transition fillet 101, the outer ball locking point 102, the inner transition fillet 201, the inner ball locking point 202 and the cut surface 4. The pocket hole 3 with a special-shaped structure enables the rolling elements 10 to rotate more flexibly inside the cage. Moreover, a metal reinforcement block 9 is inserted between the outer ring 1 and the inner ring 2. The metal reinforcement block 9 can improve the overall service strength of the cage and prevent it from deforming during high-speed rotation. At the same time, heat absorption and dissipation structures are arranged inside and outside the metal reinforcement block 9, so that the cage can quickly dissipate heat during the rotation of the bearing, improving the service performance of the cage.

[0047] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special cage for a super-high-speed angular contact bearing. The bearing cage mainly consists of an outer ring and an inner ring to form a main structure, and the outer ring and the inner ring are injection-molded and fixed into an integral structure; It is characterized in that Including: Pocket holes, which are equidistantly and circumferentially opened inside the sides of the outer ring and the inner ring, and cut surfaces are provided on both sides of the pocket holes. The cut surfaces are smooth curved surface structures; Oblique angles, which are opened on the sides of the outer ring and the inner ring, and the oblique angles are used to improve the deformation amount caused by material shrinkage during the injection molding of the outer ring and the inner ring; Outer transition fillets, which are opened on both sides of the pocket holes provided on the inner side of the outer ring, and outer ball locking points are provided on the side surfaces of the pocket holes opened inside the outer ring; Inner transition fillets, which are opened on both sides of the pocket holes provided on the inner side of the inner ring, and inner ball locking points are provided on the side surfaces of the pocket holes opened inside the inner ring; The outer ring and the inner ring are fitted and fixed, and the positions of the pocket holes opened on the sides of the outer ring and the inner ring communicate with each other correspondingly. The inner ring and the outer ring are made of PEEK material; The cut surfaces and the outer ball locking points are smoothly connected and arranged on both sides of the pocket holes in the outer ring, and the cut surfaces and the inner ball locking points are smoothly connected and arranged on both sides of the pocket holes in the inner ring; A reinforcing groove and outer heat discharge holes are further provided on the inner side of the outer ring: Reinforcing groove, which is opened inside the outer ring at equal angles, and adjustment grooves are symmetrically opened on the left and right sides of the reinforcing groove; Outer heat discharge holes, which are opened on the side of the outer ring, and the outer heat discharge holes communicate with the reinforcing groove. At the same time, a metal reinforcing block is clamped inside the reinforcing groove; Elastic metal sheets and inner heat discharge holes are further provided on the inner and outer sides of the metal reinforcing block: Elastic metal sheets, which are fitted and fixed on the left and right sides of the metal reinforcing block. A heat collecting groove is opened inside the metal reinforcing block; Inner heat discharge holes, which are opened at the middle position on the front side of the metal reinforcing block, and a rubber buffer pad is fixedly clamped on the outer side surface of the metal reinforcing block.

2. The cage for a super-high speed angular contact bearing according to claim 1, wherein: A rolling body for controlling the rotational connection of the bearing is rotatably arranged through the inside of the pocket hole, and the smooth structure of the cut surface enables the rolling body to be in smooth contact with the outer ring and the inner ring.

3. The special cage for a super-high-speed angular contact bearing according to claim 1, characterized in that: The metal reinforcing block and the outer ring form a dismountable structure through the reinforcing groove. The front side surface of the metal reinforcing block is pressed and fitted inside the reinforcing groove through the rubber buffer pad. At the same time, the left and right sides of the metal reinforcing block are respectively elastically pressed and fitted inside the adjustment grooves through the elastic metal sheets.

4. The special cage for a super-high-speed angular contact bearing according to claim 1, wherein: The outer heat discharge holes are equidistantly opened on the side of the outer ring, and the positions and sizes of the outer heat discharge holes opened in the outer ring correspond to those of the inner heat discharge holes opened in the metal reinforcing block.

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