Assembled retainer

Abstract

The invention discloses an assembled retainer which comprises a first annular frame body and a second annular frame body which are oppositely arranged, and a plurality of window beams for connecting the first annular frame body and the second annular frame body, and window holes for mounting rolling bodies are formed between the adjacent window beams. The first annular frame body, the second annular frame body and the window beam are integrally formed, and the basic structural strength of the whole retainer is guaranteed. A trapezoidal slot is formed in the inner side of each window beam; and slot holes matched with the trapezoidal slots are formed in the first annular frame body. The assembled retainer further comprises an auxiliary supporting block, the auxiliary supporting block comprises a gasket and a trapezoidal inserting block fixedly arranged on the outer side of the gasket, and the trapezoidal inserting block is inserted into the trapezoidal inserting groove and the inserting groove hole so that the radial limiting capacity of the bearing retainer to the rolling body can be enhanced. The two sides, facing the window holes, of each window beam protrude to form the main supporting parts abutting against the rolling bodies, the contact area between the rolling bodies and the window beams is reduced, then friction resistance borne by the rolling bodies during operation is reduced, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing retainers, and in particular relates to an assembled retainer. Background Art

[0002] Bearings are indispensable components in mechanical operation, and their performance and reliability are directly related to the stability and life of the entire mechanical system. As an important component of the bearing, the bearing cage is used to maintain the relative position of the bearing rolling elements, prevent direct contact between the rolling elements, reduce friction, and extend the service life of the bearing. Existing cages are usually composed of two annular frames and a window beam connecting the two annular frames. In order to ensure the structural strength of the cage, the annular frame and the window beam are prepared by one-piece molding, and the sheet material is prepared into an integrated cage through processes such as bending and punching, so that the thickness of the window beam is consistent with the thickness of the annular frame. As a result, the following problems are prone to occur:

[0003] 1. The thickness of the window beam is insufficient, the structural strength is low, it is easy to be damaged during use, and the radial limiting capacity of the rolling element is poor, which makes it difficult to meet the requirements of bearing stability during high-intensity operation;

[0004] 2. The inner side of the window beam is relatively easy to be damaged. When the window beam is damaged, the entire retainer needs to be replaced, which increases the difficulty and cost of maintenance;

[0005] 3. The contact area between the window beam and the rolling element is large, and there is a high friction between the rolling element and the window beam. Summary of the invention

[0006] In view of the problems and shortcomings of the above-mentioned prior art, the present invention provides an assembled cage, which ensures the basic structural strength of the cage by adopting an integrated first annular frame, a window beam and a second annular frame. By assembling an auxiliary support block on the inner side of the window beam, the radial limiting ability of the cage on the rolling body is improved to increase the stability of the bearing operation. The two sides of the window beam are protruding with main support parts that abut against the rolling body, which reduces the contact area between the window beam and the rolling body and reduces the friction resistance of the rolling body when rotating.

[0007] The present invention is achieved through the following technical solutions:

[0008] An assembled cage includes a first annular frame and a second annular frame arranged opposite to each other and a plurality of window beams connecting the first annular frame and the second annular frame, and a window hole for installing a rolling body is formed between adjacent window beams. The first annular frame, the second annular frame and the window beam are integrally formed to ensure the basic structural strength of the entire cage. A trapezoidal slot is provided on the inner side of each window beam, and a slot hole matching the trapezoidal slot is provided on the first annular frame. The assembled cage also includes an auxiliary support block, which includes a gasket and a trapezoidal plug-in block fixed to the outer side of the gasket, the trapezoidal plug-in block is plugged into the trapezoidal slot and the slot hole, and the outer wall of the gasket is fitted to the inner wall of the window beam to enhance the radial limiting ability of the bearing cage to the rolling body, and the auxiliary support block plays a protective role on the window beam. Each window beam has a main support portion protruding on both sides of the window hole to abut against the rolling body, thereby reducing the contact area between the rolling body and the window beam, thereby reducing the friction resistance of the rolling body during operation, and improving the service life of the bearing.

[0009] Furthermore, the assembled retainer also includes a blocking ring, which is detachably fixed to the top of the first annular frame and can prevent the trapezoidal plug from escaping from the trapezoidal slot. The inner diameter of the blocking ring is consistent with the inner diameter of the first annular frame, and the outer diameter of the blocking ring is consistent with the outer diameter of the first annular frame.

[0010] Further, an annular groove is provided on one side of the first annular frame away from the window beam, and the annular groove is located on the inner side of the first annular frame. The thickness of the blocking ring is consistent with the thickness of the annular frame. The bottom of the blocking ring protrudes with an annular protrusion that cooperates with the annular groove. When the blocking ring is installed on the top of the first annular frame, the annular protrusion is located in the annular groove. The annular protrusion cooperates with the annular groove, effectively increasing the contact area between the blocking ring and the first annular frame, and improving the connection stability between the blocking ring and the first annular frame. At the same time, when the bearing is running at high speed, the annular protrusion of the blocking ring abuts against the inner wall of the first annular frame, which can overcome a certain centrifugal force and prevent the blocking ring from being relatively offset with the first annular frame when the bearing is running. The annular protrusion cooperates with the annular groove, and can also play a role in positioning the blocking ring, ensuring that the blocking ring can be accurately installed on the first annular frame. The sum of the length of the trapezoidal slot and the length of the slot hole is equal to the length of the trapezoidal plug-in block, and the top of the trapezoidal plug-in block abuts against the blocking ring, effectively preventing the trapezoidal plug-in block from slipping relative to the window beam in its extension direction.

[0011] Furthermore, the outer wall of the gasket is an arc-shaped surface, and the curvature of the outer wall of the gasket is the same as the curvature of the inner wall of the window beam. The gasket and the window beam are fully fitted to improve the stability between the gasket and the window beam, so that the retainer provides stable radial support for the rolling element. A first transition chamfer is provided between the two sides of the gasket and the trapezoidal plug-in block to prevent excessive stress concentration between the gasket and the trapezoidal plug-in block and improve the structural stability of the auxiliary support block.

[0012] Furthermore, each gasket has an auxiliary support portion protruding on both sides of the window hole and abutting against the rolling body, and the outer wall of the auxiliary support portion abuts against the inner wall of the main support portion. The main support portion of the window beam and the auxiliary support portion of the gasket jointly support the rolling body, thereby improving the radial support stability of the rolling body and reducing the rotational resistance of the rolling body.

[0013] Furthermore, the outer wall of the main support part and the outer wall of the auxiliary support part are coated with Teflon coating. Teflon coating material has extremely high wear resistance, its surface is smooth and will not stick to the surface of the impact object. It is sprayed on the surface of the material that needs to be wear-resistant through a special preparation method, which can not only improve production efficiency, but also extend the service life of the wear-resistant material. By coating the outer wall of the main support part and the outer wall of the auxiliary support part with Teflon coating, the service life of the window beam and gasket is effectively improved. The friction coefficient of Teflon coating is low. Although the friction coefficient will change when the load slides, the value is only between 0.05-0.15. This low friction characteristic makes it perform well in some applications that need to reduce friction. Coating Teflon coating on the retaining frame effectively reduces the friction resistance of the rolling element during operation.

[0014] Furthermore, a second transition chamfer is formed between the main support portion and the side wall of the window beam to avoid stress concentration between the main support portion and the side wall of the window beam and damage to the window beam. A third transition chamfer is formed between the auxiliary support portion and the gasket to avoid stress concentration between the auxiliary support portion and the side wall of the gasket and damage to the window beam.

[0015] Furthermore, a support protrusion is protruded from one side of the first annular frame body facing the window hole and one side of the second annular frame body facing the window hole, so as to reduce the contact area between the first annular frame body and the rolling body, and reduce the contact area between the second annular frame body and the rolling body, thereby reducing the friction resistance encountered by the rolling body during operation. The thickness of the support protrusion is consistent with the thickness of the first annular frame body, so as to ensure the stability of the axial limit of the rolling body by the retaining frame. Each support protrusion is located in the middle of the window hole.

[0016] Furthermore, oil storage grooves are formed between the window beams on both sides of the supporting protrusions and the supporting protrusions, thereby increasing the storage volume of lubricating oil in the window holes and improving the lubrication effect of the retaining frame on the rolling elements.

[0017] Furthermore, the gasket has a variety of thickness types, and according to the actual bearing requirements, a gasket of appropriate thickness can be selected and assembled to the inner side of the cage to adapt the bearing to different application scenarios. The thickness of the gasket is less than the thickness of the window beam, and the height of the gasket is equal to the height of the window beam to ensure the stability of the gasket after being assembled to the window beam.

[0018] Beneficial effects of the present invention:

[0019] 1. The basic structural strength of the retainer is ensured by adopting an integrated first annular frame, a window beam and a second annular frame;

[0020] 2. By installing auxiliary support blocks on the inner side of the window beam, the radial limiting capacity of the cage on the rolling element is improved to increase the stability of the bearing operation;

[0021] 3. The two sides of the window beam are protruding with main support parts that abut against the rolling body, which reduces the contact area between the window beam and the rolling body and reduces the friction resistance of the rolling body when it rotates;

[0022] 4. The auxiliary support block can be detachably assembled to the inner side of the window beam to protect the window beam. At the same time, when the auxiliary support block is damaged, the damaged auxiliary support block can be removed to repair or replace the damaged auxiliary support block, thereby reducing the maintenance cost of the entire retaining frame and thus reducing the use cost of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A connection diagram for illustrating a schematic embodiment of an assembled retainer in the present invention;

[0024] Figure 2 A side view for illustrating a schematic embodiment of an assembled retainer in the present invention;

[0025] Figure 3 A schematic structural diagram for illustrating a schematic implementation of an assembled retainer in the present invention;

[0026] Figure 4 To illustrate Figure 3 A partial enlarged schematic diagram in the middle;

[0027] Figure 5 A schematic structural diagram for illustrating a schematic implementation of an assembled retainer in a cut-away state according to the present invention;

[0028] Figure 6 To illustrate Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0029] Figure 7 A schematic structural diagram for illustrating a schematic implementation of an auxiliary support block of an assembled retainer in the present invention;

[0030] Figure 8 To illustrate Figure 7 A partial enlarged schematic diagram of point C in the middle;

[0031] Fig. 9 To illustrate Figure 7 The partial enlarged schematic diagram of point D in the middle;

[0032] Fig.10 A structural schematic diagram for illustrating a schematic implementation of a sealing ring of an assembled retainer in the present invention.

[0033] List of parts and reference numerals:

[0034] 1. First annular frame; 11. Slot hole; 12. Annular groove; 13. Support protrusion; 14. Oil storage tank; 2. Second annular frame; 3. Window beam; 31. Trapezoidal slot; 32. Main support portion; 33. Second transition chamfer; 4. Window hole; 5. Auxiliary support block; 51. Gasket; 511. First transition chamfer; 512. Auxiliary support portion; 513. Third transition chamfer; 52. Trapezoidal plug block; 6. Sealing ring; 61. Annular protrusion. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0037] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention refer not only to changes in position, but also to movements such as rotation and rolling in which there is no relative change in position but a change in state.

[0038] Finally, it should be noted that when a component is referred to as being "located" or "set on" another component, it can be on the other component or there can be an intermediate component at the same time. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be an intermediate component at the same time.

[0039] like Figures 1 to 10The assembled cage shown in the figure comprises a first annular frame 1 and a second annular frame 2 arranged opposite to each other and a plurality of window beams 3 connecting the first annular frame 1 and the second annular frame 2, and a window hole 4 for installing a rolling body is formed between adjacent window beams 3. The first annular frame 1, the second annular frame 2 and the window beam 3 are integrally formed to ensure the basic structural strength of the entire cage. A trapezoidal slot 31 is provided on the inner side of each window beam 3, and a slot hole 11 matching the trapezoidal slot 31 is provided on the first annular frame 1. The assembled cage also comprises an auxiliary support block 5, the auxiliary support block 5 comprises a gasket 51 and a trapezoidal plug-in block 52 fixed to the outer side of the gasket 51, the trapezoidal plug-in block 52 is plugged into the trapezoidal slot 31 and the slot hole 11, and the outer wall of the gasket 51 is attached to the inner wall of the window beam 3 to enhance the radial limiting ability of the bearing cage to the rolling body, and the auxiliary support block 5 plays a protective role on the window beam 3. Each window beam 3 has main support parts 32 protruding from both sides of the window hole 4 and abutting against the rolling body, thereby reducing the contact area between the rolling body and the window beam 3, thereby reducing the friction resistance encountered by the rolling body during operation and increasing the service life of the bearing.

[0040] In one embodiment, the sheet material is formed into a first annular frame 1, a second annular frame 2, and a window beam 3 connecting the first annular frame 1 and the second annular frame 2 through bending, stamping, and other processes, that is, the frame structure of the assembled retainer is preliminarily formed. A slot hole 11 is opened on the inner side of the first annular frame 1, and a trapezoidal slot 31 is opened on the inner side of the window beam 3. The slot hole 11 and the trapezoidal slot 31 cooperate with each other and correspond one to one. Along the direction close to the central axis of the retainer, the width of the slot hole 11 and the trapezoidal slot 31 gradually decreases. The trapezoidal plug block 52 of the auxiliary support block 5 is inserted into each slot hole 11 and the trapezoidal slot 31 in turn. Specifically, the trapezoidal plug block 52 of the auxiliary support block 5 is first inserted into the slot hole 11, and then penetrates the slot hole 11 and is inserted into the trapezoidal slot 31, so that the outer wall of the gasket 51 fits against the inner wall of the window beam 3, thereby realizing the assembly of the gasket 51 on the inner side of each window beam 3 to protect the inner side of the window beam 3. The gasket 51 and the window beam 3 jointly form a radial limit for the rolling body, thereby improving the stability of the rolling body during operation.

[0041] It should be noted that in the prior art, most assembled retainers, in order to increase the thickness of the window beam 3 of the retainer, often adopt a separate design of the window beam 3 and the annular frame, which greatly reduces the structural strength of the retainer itself.

[0042] In one embodiment, the slot hole 11 is consistent with the shape of the cross section of the trapezoidal slot 31, and the slot hole 11 is located in the extension direction of the trapezoidal slot 31. The trapezoidal plug block 52 cooperates with the trapezoidal slot 31, and the trapezoidal plug block 52 is inserted into the trapezoidal slot 31 and the slot hole 11, which effectively prevents the trapezoidal plug block 52 from being separated from the window beam 3 in the radial direction of the retaining frame, thereby achieving a tight fit between the auxiliary support block 5 and the window beam 3. The gasket 51 of the assembled auxiliary support block 5 is tightly attached to the inner wall of the window beam 3 to protect the inner side of the window beam 3. It should be pointed out that when the bearing is working, the inner wall of the retaining frame is more easily damaged than the outer wall, so the auxiliary support block 5 is set at the inner wall position of the retaining frame.

[0043] In one embodiment, main support parts 32 are protruded on both sides of the window beam 3, and the main support parts 32 abut against the rolling body to realize radial limiting of the rolling body. By reducing the contact area between the window beam 3 and the rolling body, the friction force of the rolling body during operation is reduced. It should be noted that the main support parts 32 are provided on the side walls of the window beam 3 to reduce the contact area between the window beam 3 and the rolling body. Although this will weaken the limiting ability of the rolling body, the window beam 3 still has the limiting ability of the rolling body in its extension direction. Compared with the abutment between the entire window beam 3 and the rolling body, the radial limiting effect of the abutment between the main support parts 32 and the rolling body on the rolling body is basically the same. The contact area when the main support parts 32 abut against the rolling body is greatly reduced compared with the contact area when the entire window beam 3 abuts against the rolling body, that is, the provision of the main support parts 32 can greatly reduce the friction resistance of the rolling body during operation.

[0044] In one embodiment, the length of the main supporting portion 32 is greater than half the length of the window beam 3 .

[0045] In one embodiment, the main support portion 32 is located in the middle position of the window beam 3. Since the main support portion 32 protrudes from the side wall of the window beam 3, a first oil groove is formed between the main support portion 32 and the first annular frame 1, and a second oil groove is formed between the main support portion 32 and the second annular frame 2, thereby increasing the oil storage capacity of the retaining frame, helping the lubricating oil to lubricate the rolling elements in the window hole 4, and improving the lubricating effect and service life of the lubricating oil on the bearing.

[0046] Preferably, the assembled retainer further comprises a blocking ring 6, which is detachably fixed to the top of the first annular frame 1 and can prevent the trapezoidal plug 52 from being separated from the trapezoidal slot 31. The inner diameter of the blocking ring 6 is consistent with the inner diameter of the first annular frame 1, and the outer diameter of the blocking ring 6 is consistent with the outer diameter of the first annular frame 1.

[0047] In one embodiment, after the trapezoidal inserts 52 of each auxiliary support block 5 are inserted into the trapezoidal slots 31, the blocking ring 6 is fixed to the top of the first annular frame 1 to prevent the trapezoidal inserts 52 inserted into the trapezoidal slots 31 from being separated from the trapezoidal slots 31. The blocking ring 6 is annular and has the same thickness as the first annular frame 1.

[0048] In one embodiment, at least two threaded holes are opened on the top of the first annular frame 1, and a through hole aligned with the threaded hole is provided on the sealing ring 6. The fixing bolts pass through the through hole and are screwed into the threaded hole to fix the sealing ring 6 to the first annular frame 1.

[0049] In one embodiment, the sealing ring 6 is bonded to the top of the first annular frame 1 by adhesive. When removing the sealing ring 6 , the adhesive can be heated to separate the sealing ring 6 from the top of the first annular frame 1 .

[0050] Preferably, an annular groove 12 is provided on one side of the first annular frame 1 away from the window beam 3, and the annular groove 12 is located on the inner side of the first annular frame 1. The thickness of the blocking ring 6 is consistent with the thickness of the annular frame. The bottom of the blocking ring 6 protrudes with an annular protrusion 61 that cooperates with the annular groove 12. When the blocking ring 6 is installed to the top of the first annular frame 1, the annular protrusion 61 is located in the annular groove 12. The annular protrusion 61 cooperates with the annular groove 12, effectively improving the contact area between the blocking ring 6 and the first annular frame 1, and improving the connection stability of the blocking ring 6 and the first annular frame 1. At the same time, when the bearing is running at high speed, the annular protrusion 61 of the blocking ring 6 abuts against the inner wall of the first annular frame 1, which can overcome a certain centrifugal force and prevent the blocking ring 6 from being relatively offset from the first annular frame 1 when the bearing is running. The annular protrusion 61 cooperates with the annular groove 12, and can also play a role in positioning the blocking ring 6, ensuring that the blocking ring 6 can be accurately installed to the first annular frame 1. The sum of the length of the trapezoidal slot 31 and the slot hole 11 is equal to the length of the trapezoidal plug 52 . The top of the trapezoidal plug 52 abuts against the blocking ring 6 , effectively preventing the trapezoidal plug 52 from sliding relative to the window beam 3 in its extending direction.

[0051] Preferably, the outer wall of the gasket 51 is an arc-shaped surface, and the curvature of the outer wall of the gasket 51 is the same as the curvature of the inner wall of the window beam 3. The gasket 51 and the window beam 3 are fully fitted to improve the stability between the gasket 51 and the window beam 3, so that the cage provides stable radial support for the rolling element. A first transition chamfer 511 is provided between the two sides of the gasket 51 and the trapezoidal plug-in block 52 to prevent excessive stress concentration between the gasket 51 and the trapezoidal plug-in block 52 and improve the structural stability of the auxiliary support block 5.

[0052] In one embodiment, if Figure 7-10As shown, both ends of the gasket 51 of the auxiliary support block 5 are provided with first transition chamfers 511, which can make the stress distribution more uniform and prevent the gasket 51 from breaking with the trapezoidal plug-in block 52. The first transition chamfer 511 located on the side close to the second annular frame 2 can also play a guiding role, which can facilitate the insertion of the trapezoidal plug-in block 52 into the trapezoidal slot 31, and reduce the adverse effect of the gasket 51 on the insertion of the trapezoidal plug-in block 52.

[0053] Preferably, each gasket 51 has an auxiliary support portion 512 protruding on both sides of the window hole 4 and abutting against the rolling body, and the outer wall of the auxiliary support portion 512 abuts against the inner wall of the main support portion 32. The main support portion 32 of the window beam 3 and the auxiliary support portion 512 of the gasket 51 jointly support the rolling body, thereby improving the radial support stability of the rolling body and reducing the rotational resistance of the rolling body.

[0054] In one embodiment, auxiliary support portions 512 are protruded from both sides of the gasket 51, and the auxiliary support portions 512 directly abut against the rolling body to limit the radial direction of the rolling body. The auxiliary support portions 512 protrude from the side walls of the gasket 51 and fit to the inner wall of the main support portion 32. Here, the function of the auxiliary support portion 512 is consistent with that of the main support portion 32. The auxiliary support portion 512 is provided to extend the thickness of the main support portion 32 and improve the radial limiting effect on the rolling body.

[0055] Preferably, the outer wall of the main support part 32 and the outer wall of the auxiliary support part 512 are coated with Teflon coating. Teflon coating material has extremely high wear resistance, its surface is smooth and will not stick to the surface of the impact object. It is sprayed on the surface of the material that needs to be wear-resistant through a special preparation method, which can not only improve production efficiency but also extend the service life of the wear-resistant material. By coating the outer wall of the main support part 32 and the outer wall of the auxiliary support part 512 with Teflon coating, the service life of the window beam 3 and the gasket 51 is effectively improved. The friction coefficient of the Teflon coating is low. Although the friction coefficient will change when the load slides, the value is only between 0.05-0.15. This low friction characteristic makes it perform well in some applications that need to reduce friction. Coating the Teflon coating on the retaining frame effectively reduces the friction resistance of the rolling element during operation.

[0056] In one embodiment, the Teflon coating has an extremely low friction coefficient, usually between 0.05-0.15. During the operation of the bearing, the Teflon coating can significantly reduce the friction between the cage and the rolling element. This helps the bearing to rotate smoothly under a lower driving force, reduces energy loss, and improves mechanical efficiency. During the operation of the bearing, continuous friction and wear will occur between the window beam 3 and the rolling element. The Teflon coating has good wear resistance and can withstand a certain degree of friction without being easily damaged. It forms a protective film on the surface of the window beam 3 of the cage. When tiny particles enter the friction interface of the window beam 3, this protective film can reduce the scratches and wear of these particles on the surface of the window beam 3. In addition, the Teflon coating itself has certain self-lubricating properties. Even in the case of insufficient grease or failure of the lubrication system, the Teflon coating can provide a certain lubrication for the bearing, reducing the risk of damage to the bearing due to dry friction. When the bearing works under extreme conditions such as high load and high temperature, the window beam 3 and the rolling element may be bitten or adhered. The non-stick properties of Teflon coating can effectively prevent this from happening.

[0057] Preferably, a second transition chamfer 33 is formed between the main support portion 32 and the side wall of the window beam 3 to avoid stress concentration between the main support portion 32 and the side wall of the window beam 3 and damage to the window beam 3. A third transition chamfer 513 is formed between the auxiliary support portion 512 and the gasket 51 to avoid stress concentration between the auxiliary support portion 512 and the side wall of the gasket 51 and damage to the window beam 3.

[0058] In one embodiment, when the window beam 3 or the gasket 51 is subjected to external force, the sharp corners are prone to stress concentration. The second transition chamfer 33 or the third transition chamfer 513 can make the stress distribution more uniform. In particular, in a mechanical mechanism where the bearing is subjected to alternating loads, providing chamfers at the corners can effectively avoid the generation of fatigue cracks caused by stress concentration, thereby extending the service life of the parts.

[0059] Preferably, a support protrusion 13 is protruded from the side of the first annular frame 1 facing the window hole 4 and the side of the second annular frame 2 facing the window hole 4, so as to reduce the contact area between the first annular frame 1 and the rolling body, reduce the contact area between the second annular frame 2 and the rolling body, and further reduce the friction resistance of the rolling body during operation. The thickness of the support protrusion 13 is consistent with the thickness of the first annular frame 1, so as to ensure the stability of the axial limit of the rolling body by the retaining frame. Each support protrusion 13 is located in the middle of the window hole 4.

[0060] In one embodiment, a support protrusion 13 is protruded from one side of the first annular frame 1 facing the window hole 4 and one side of the second annular frame 2 facing the window hole 4, and the support protrusion 13 abuts against the rolling body, thereby reducing the contact area between the rolling body and the first annular frame 1 and the second annular frame 2, thereby reducing the friction resistance encountered by the rolling body during operation. The support protrusion 13 is located in the middle of the window hole 4 to ensure the stability of the rolling body operation. It should be noted that in the prior art, the top surface or bottom surface of the rolling body directly abuts against the first annular frame 1 or the second annular frame 2, the contact area between the rolling body located in the window hole 4 and the annular frame is large, and the friction resistance encountered by the rolling body during rotation is large.

[0061] Preferably, oil storage grooves 14 are formed between the window beams 3 and the supporting protrusions 13 on both sides of the supporting protrusions 13 to increase the storage volume of the lubricating oil in the window hole 4 and improve the lubricating effect of the retaining frame on the rolling body.

[0062] In one embodiment, during the operation of the bearing, friction will be generated between the rolling element (such as a ball or roller) and the raceway. The oil reservoir 14 can store lubricating oil so that the lubricating oil can be continuously supplied to the contact surface between the rolling element and the raceway. The oil in the oil reservoir 14 can be evenly distributed on the contact surface when the rolling element passes through to form an oil film, thereby effectively reducing the friction coefficient, reducing wear, and extending the service life of the bearing. When the bearing is working, heat will be generated due to friction. While playing a lubricating role, the lubricating oil in the oil reservoir 14 can also absorb and take away heat. The lubricating oil flows between the rolling element and the raceway, transferring heat from the friction-generated part to other parts of the bearing, and then dissipating it to the surrounding environment. Impurities such as dust and metal debris may enter the bearing in the working environment of the bearing. The lubricating oil in the oil reservoir 14 can take away these impurities and prevent them from accumulating between the rolling element and the raceway, thereby avoiding further damage to the bearing. The oil reservoir 14 can also store a certain amount of lubricating oil, so that the bearing does not need to be frequently added with lubricating oil for a period of time.

[0063] Preferably, the gasket 51 has a variety of thickness types, and the gasket 51 of appropriate thickness can be selected and assembled to the inner side of the cage according to the actual bearing requirements, so that the bearing can adapt to different application scenarios. The thickness of the gasket 51 is less than the thickness of the window beam 3, and the height of the gasket 51 is equal to the height of the window beam 3 to ensure the stability of the gasket 51 after being assembled to the window beam 3.

[0064] In one embodiment, the auxiliary support block 5 with a gasket 51 of appropriate thickness can be selected according to actual needs to adapt to the working environment of the bearing. By assembling the gasket 51 on the inner side of the window beam 3, the retaining frame provides a more stable support environment for the rolling element. In the high-precision machine tool spindle bearing, the increase in the thickness of the window beam 3 helps to maintain the uniform distribution of the rolling element and reduce the shaking and deviation of the rolling element during operation. This is very important for ensuring the machining accuracy of the machine tool, because any slight change in the position of the rolling element may cause the spindle to jump, thereby affecting the accuracy of the machined parts.

[0065] When the above-mentioned assembled cage is used, the basic structural strength of the cage is ensured by using the integrated first annular frame 1, window beam 3 and second annular frame 2. By assembling the auxiliary support block 5 on the inner side of the window beam 3, the radial limiting ability of the cage on the rolling body is improved to increase the stability of the bearing operation. The two sides of the window beam 3 are protruding with main support parts 32 that abut against the rolling body, which reduces the contact area between the window beam 3 and the rolling body and reduces the friction resistance of the rolling body when rotating.

[0066] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An assembled retainer, comprising a first annular frame and a second annular frame arranged opposite to each other and a plurality of window beams connecting the first annular frame and the second annular frame, wherein window holes for mounting rolling bodies are formed between adjacent window beams, characterized in that: The first annular frame, the second annular frame and the window beam are integrally formed, a trapezoidal slot is provided on the inner side of each window beam, and a slot hole matching the trapezoidal slot is provided on the first annular frame; The assembled retainer further includes an auxiliary support block, the auxiliary support block including a gasket and a trapezoidal plug-in block fixed to the outer side of the gasket, the trapezoidal plug-in block is plugged into the trapezoidal slot and the slot hole, and the outer wall of the gasket is attached to the inner wall of the window beam; Each of the window beams has main support portions protruding from both sides of the window hole and abutting against the rolling body.

2. An assembled retainer according to claim 1, characterized in that: The assembled retaining frame further comprises a blocking ring, which is detachably fixed to the top of the first annular frame and can prevent the trapezoidal plug-in block from being separated from the trapezoidal slot.

3. An assembled retainer according to claim 2, characterized in that: An annular groove is provided on a side of the first annular frame away from the window beam, and the annular groove is located on the inner side of the first annular frame. The thickness of the sealing ring is consistent with the thickness of the annular frame. An annular protrusion that cooperates with the annular groove is protruded from the bottom of the sealing ring. The sum of the length of the trapezoidal slot and the length of the slot hole is equal to the length of the trapezoidal plug block, and the top of the trapezoidal plug block abuts against the sealing ring.

4. The assembled retainer according to claim 1, characterized in that: The outer wall of the gasket is an arc-shaped surface, the curvature of the outer wall of the gasket is the same as the curvature of the inner wall of the window beam, and a first transition chamfer is provided between the two sides of the gasket and the trapezoidal plug block.

5. The assembled retainer according to claim 1, characterized in that: Each gasket has auxiliary support parts protruding from both sides of the window hole and abutting against the rolling body, and the outer wall of the auxiliary support part abuts against the inner wall of the main support part.

6. An assembled retainer according to claim 5, characterized in that: The outer wall of the main support part and the outer wall of the auxiliary support part are both coated with Teflon coating.

7. The assembled retainer according to claim 5, characterized in that: A second transition chamfer is formed between the main support portion and the side wall of the window beam, and a third transition chamfer is formed between the auxiliary support portion and the gasket.

8. The assembled retainer according to claim 1, characterized in that: A support protrusion is protruded from one side of the first annular frame body facing the window hole and one side of the second annular frame body facing the window hole. The thickness of the support protrusion is consistent with the thickness of the first annular frame body. Each of the support protrusions is located in the middle of the window hole.

9. An assembled retainer according to claim 8, characterized in that: Oil storage grooves are formed between the window beams on both sides of the supporting protrusion and the supporting protrusion.

10. The assembled retainer according to claim 1, characterized in that: The spacers have a variety of thickness types, the thickness of the spacers is smaller than the thickness of the window beam, and the height of the spacers is equal to the height of the window beam.

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