Bearing with filtering function

Abstract

The invention provides a bearing with a filtering function, which comprises an inner ring, an outer ring, a roller, a first check ring and a second check ring, the first check rings are fixed to the two ends of the inner side of the outer ring, the second check rings are fixed to the two ends of the outer side of the inner ring, and sliding sealing is formed between the first check rings and the second check rings located at the same end so as to construct a lubricating cavity for containing the rollers. The first check ring and / or the second check ring are / is provided with an oil passing hole, a filter screen capable of covering the oil passing hole and a flow guide structure promoting lubricating oil to enter the lubricating cavity. Filtering and circulation of lubricating oil are achieved through the check rings with filtering and flow guiding functions, so that the clean lubricating oil can repeatedly act on the contact faces of the bearing rollers and the inner ring and the outer ring, the good lubricating function is achieved, and bearing abrasion is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of filtering, and in particular relates to a bearing with filtering function. Background Art

[0002] In high-speed rotation scenarios, bearings play a role in reducing friction between rotating parts, thereby achieving the purpose of efficient operation. For open bearings, they are lubricated by the lubricating oil in the environment. Dust and debris in the lubricating environment will repeatedly enter the bearing with the lubricating oil, thereby increasing the wear between the bearing rollers and the inner and outer rings.

[0003] Therefore, how to prevent dust from entering the bearing along with the lubricating oil is an urgent problem to be solved. Summary of the invention

[0004] The object of the present invention is to provide a bearing with a filtering function, which realizes the filtering and circulation of lubricating oil by arranging a retaining ring with filtering and diverting functions, thereby preventing the bearing from being seriously worn.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bearing with a filtering function, comprising an inner ring, an outer ring and a roller, and also comprising a first retaining ring and a second retaining ring; the first retaining ring is fixed at both ends of the inner side of the outer ring, and the second retaining ring is fixed at both ends of the outer side of the inner ring, and a sliding seal is formed between the first retaining ring and the second retaining ring located at the same end to construct a lubrication cavity for accommodating the roller; the first retaining ring and / or the second retaining ring are provided with an oil hole, a filter net capable of covering the oil hole and a guide structure for promoting lubricating oil to enter the lubrication cavity.

[0006] Furthermore, the first retaining ring is provided with a first groove, a first oil hole located at the bottom of the first groove, a first filter capable of covering the first oil hole and a first guide vane located in the first groove; the first guide vanes on the two first retaining rings are arranged in the same direction.

[0007] Furthermore, the second retaining ring is provided with a second groove, a second oil hole located at the bottom of the second groove, a second filter capable of covering the second oil hole and a second guide vane located in the second groove; the second guide vanes on the two second retaining rings are arranged in the same direction.

[0008] Furthermore, the first retaining ring is provided with a first groove, a first oil hole located at the bottom of the first groove, a first filter capable of covering the first oil hole and a first guide vane located in the first groove; the first guide vanes on the two first retaining rings are arranged in the same direction.

[0009] The second retaining ring is provided with a second groove, a second oil hole located at the bottom of the second groove, a second filter capable of covering the second oil hole and a second guide vane located in the second groove; the second guide vanes on the two second retaining rings are arranged in the same direction.

[0010] Furthermore, the oil hole is located close to the position where the corresponding guide vane is connected to the groove bottom.

[0011] Furthermore, the first retaining ring and the second retaining ring are slidingly connected via an anti-misalignment structure.

[0012] Furthermore, the anti-dislocation structure includes a circle of protrusions arranged on the inner side of the first retaining ring and a circle of grooves arranged on the outer side of the second retaining ring, and the protrusions and the grooves form a sliding engagement.

[0013] Furthermore, the protrusion has a head and a neck, and the width of the head is greater than the width of the neck; the groove has an opening and a receiving portion, the opening matches the neck, and the receiving portion matches the head.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a retaining ring with filtering and diversion functions to achieve the filtration and circulation of lubricating oil, so that the clean lubricating oil can repeatedly act on the contact surface between the bearing roller and the inner and outer rings, thereby achieving good lubrication function and reducing bearing wear.

[0015] 2. The present invention sets different retaining ring structures according to different rotation modes, thereby meeting the filtering and lubrication requirements under any working conditions.

[0016] 3. The oil hole in the present invention is located at the end of the guide vane, which can better guide the lubricating oil into the interior of the bearing to achieve efficient lubrication.

[0017] 4. The present invention adopts an anti-dislocation structure to achieve the purpose of dynamic sealing connection and anti-detachment connection between the retaining rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural stereogram of the first embodiment of the present invention; Figure 2 It is a structural explosion diagram of the first embodiment of the present invention; Figure 3 It is a front view of the structure of the first embodiment of the present invention; Figure 4 for Figure 3 Structural cross-section view along the AA axis; Figure 5 for Figure 4 A partial enlarged view of point B in the middle (the direction indicated by the arrow in the figure is the direction of lubricating oil flow); Figure 6 for Figure 4 A partial enlarged view of point C in the middle (the direction indicated by the arrow in the figure is the direction of lubricating oil flow); Figure 7 This is a schematic diagram of the first embodiment when in use (the direction indicated by the arrow in the figure is the direction of lubricating oil flow); Figure 8 The corresponding embodiment of the present invention is Figure 5 A partial enlarged view (the direction indicated by the arrow in the figure is the direction of lubricating oil flow); Fig. 9 The corresponding embodiment of the present invention is Figure 6 A partial enlarged view (the direction indicated by the arrow in the figure is the direction of lubricating oil flow); Fig.10 The corresponding embodiment of the present invention is Figure 5 A partial enlarged view (the direction indicated by the arrow in the figure is the direction of lubricating oil flow); Fig.11 The corresponding embodiment of the present invention is Figure 6 A partial enlarged view (the direction indicated by the arrow in the figure is the direction of lubricating oil flow). DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. 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.

[0020] Embodiment 1: This embodiment is applicable to the working condition where the inner ring 2 is fixed and the outer ring 1 is rotating. Figures 1 to 7 As shown, this embodiment provides a bearing with a filtering function, including an inner ring 2, an outer ring 1, a roller 3, a first retaining ring 4 and a second retaining ring 5.

[0021] Both end faces of the outer ring 1 are provided with positioning steps, and the first retaining ring 4 is installed in the positioning steps at both ends of the outer ring 1 by interference fit. The second retaining ring 5 is also installed at both ends of the outer side of the inner ring 2 by interference fit, and ensures that the outer end faces of the outer ring 1, the inner ring 2, the first retaining ring 4 and the second retaining ring 5 are flush with each other.

[0022] A sliding seal connection is formed between the first retaining ring 4 and the second retaining ring 5, thereby constructing a lubrication cavity 6 for accommodating the roller 3. Obviously, for a known bearing installation environment, the lubrication cavity 6 is filled with lubricating oil inside and outside, so that the lubricating oil in the lubrication cavity 6 provides lubrication for the rolling of the roller 3.

[0023] The inner circumference of the first retaining ring 4 is provided with a sealing groove 4.5, in which a sponge ring 7 is installed. The sponge ring 7 just forms a surface contact with the outer circumference of the second retaining ring 5. During the rotation of the first retaining ring 4, the sponge ring 7 plays a role of sliding sealing.

[0024] The first retaining ring 4 is provided with a first groove 4.1, a first oil hole 4.2 located at the bottom of the first groove 4.1, a first filter 8 capable of covering the first oil hole 4.2, and a first guide vane 4.3 located in the first groove 4.1. The first guide vanes 4.3 on the two first retaining rings 4 are arranged in the same direction. The first oil holes 4.2 and the first guide vanes 4.3 have the same number and are evenly distributed along the circumferential direction. The first filter 8 is an annular structure, which covers all the first oil holes 4.2.

[0025] The first retaining ring 4 and the second retaining ring 5 are both injection molded parts, and the first retaining ring 4 is connected to the first filter screen 8 by injection molding. The outer edge of the first filter screen 8 is flush with the outer circumferential surface of the first retaining ring 4 and is located on the inner end surface of the first retaining ring 4. After the first retaining ring 4 is assembled in the positioning step, the part of the first filter screen 8 close to the outer edge is also tightly fixed to the end surface of the positioning step.

[0026] As a preferred example, in order to better guide the lubricating oil in the external environment of the lubricating cavity 6 into the lubricating cavity 6, the first oil hole is located close to the position where the corresponding first guide vane 4.3 is connected to the bottom of the groove. When the outer ring 1 rotates, the external lubricating oil will quickly gather at the position where the first guide vane 4.3 is connected to the bottom of the groove. At this time, since the first oil hole 4.2 is provided at this position, the lubricating oil will quickly enter the lubricating cavity 6.

[0027] Since the first guide vanes 4.3 of the two first retaining rings 4 are arranged in the same direction, during the rotation of the outer ring 1, the lubricating oil enters the lubricating cavity 6 from the first oil hole 4.2 on one side of the first retaining ring 4, and then is discharged from the first oil hole 4.2 on the other side of the first retaining ring 4. It is precisely because the lubricating oil establishes a circulation between the inside and the outside of the lubricating cavity 6 that the heat generated by the rotation of the roller 3 can be discharged by the flow of the lubricating oil, thereby reducing the temperature in the lubricating cavity 6.

[0028] As a preferred example, the first retaining ring 4 and the second retaining ring 5 are also connected by a sliding connection through an anti-dislocation structure. Specifically, the anti-dislocation structure includes a circle of protrusions 4.4 arranged on the inner side of the first retaining ring 4 and a circle of grooves 5.4 arranged on the outer side of the second retaining ring 5, and the protrusions 4.4 and the grooves form a sliding connection. After the first retaining ring 4 and the second retaining ring 5 are connected by the dislocation structure, a limit can be formed in a direction parallel to the axis to prevent the first retaining ring 4 and the second retaining ring 5 from being separated when the bearing is running, thereby avoiding affecting the normal operation of the bearing.

[0029] For ease of assembly, as a preferred example, the protrusion 4.4 has a head and a neck, the width of the head is greater than the width of the neck; the groove has an opening and a receiving portion, the opening matches the neck, and the receiving portion matches the head. The protrusion 4.4 and the slot 5.4 are connected in a clearance fit manner, and since the gap formed between the two is connected to the lubrication cavity 6, part of the lubricating oil will enter the gap to provide lubrication for the protrusion 4.4 and the slot 5.4.

[0030] Embodiment 2: Figure 8 and 9 As shown, the difference between this embodiment and the first embodiment is that this embodiment is applicable to the working condition where the outer ring 1 is fixed and the inner ring 2 is rotating. Specifically, the second retaining ring 5 is provided with a second groove 5.1, a second oil hole 5.2 located at the bottom of the second groove 5.1, a second filter screen 9 capable of covering the second oil hole 5.2, and a second guide vane 5.3 located in the second groove 5.1. The second guide vanes 5.3 on the two second retaining rings 5 ​​are arranged in the same direction.

[0031] The second oil holes 5.2 and the second guide vanes 5.3 have the same number and are evenly distributed along the circumferential direction. The second filter screen 9 is an annular structure that covers all the second oil holes 5.2.

[0032] The second retaining ring 5 is connected to the second filter screen 9 by injection molding. The inner edge of the second filter screen 9 is flush with the inner circular surface of the second retaining ring 5 and is located on the inner end surface of the second retaining ring 5.

[0033] That is to say, during the operation of the bearing in this embodiment, external lubricating oil enters the lubrication cavity 6 through the second oil hole 5 . 2 on one of the second retaining rings 5 ​​, and then is discharged from the second oil hole 5 . 2 on the other second retaining ring 5 . Example

[0034] like Fig.10 and 11 As shown, the difference between this embodiment and the first embodiment is that this embodiment is applicable to the working condition where both the outer ring 1 and the inner ring 2 rotate. Specifically, the first retaining ring 4 is provided with a first groove 4.1, a first oil hole 4.2 located at the bottom of the first groove 4.1, a first filter 8 capable of covering the first oil hole 4.2, and a first guide vane 4.3 located in the first groove 4.1. The first guide vanes 4.3 on the two first retaining rings 4 are arranged in the same direction.

[0035] Similarly, the second retaining ring 5 is provided with a second groove 5.1, a second oil hole 5.2 located at the bottom of the second groove 5.1, a second filter screen 9 capable of covering the second oil hole 5.2, and a second guide vane 5.3 located in the second groove 5.1. The second guide vanes 5.3 on the two second retaining rings 5 ​​are arranged in the same direction.

[0036] If the outer ring 1 and the inner ring 2 rotate in the same direction, the first guide vane 4.3 and the second guide vane 5.3 are arranged in the same direction. Similarly, if the outer ring 1 and the inner ring 2 rotate in opposite directions, the first guide vane 4.3 and the second guide vane 5.3 are arranged in opposite directions. The purpose of such arrangement is to establish circulation of lubricating oil in the same flow direction.

[0037] In this embodiment, the arrangement of the relevant components and structures is the same as that of Embodiments 1 and 2, so they will not be described in detail.

[0038] It should be noted that the diameter difference between the inner and outer rings 1 of the bearing in the present invention should be greater than 10 mm, so that there is enough space to install the retaining ring.

[0039] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0040] It should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified and replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A bearing with a filtering function, comprising an inner ring (2), an outer ring (1) and a roller (3), characterized in that: The invention also comprises a first retaining ring (4) and a second retaining ring (5); the first retaining ring (4) is fixed at two ends of the inner side of the outer ring (1), and the second retaining ring (5) is fixed at two ends of the outer side of the inner ring (2); a sliding seal is formed between the first retaining ring (4) and the second retaining ring (5) located at the same end, thereby constructing a lubrication cavity (6) for accommodating the roller (3); the first retaining ring (4) and / or the second retaining ring (5) are provided with an oil hole, a filter screen capable of covering the oil hole, and a flow guide structure for promoting lubricating oil to enter the lubrication cavity (6).

2. A bearing with filtering function according to claim 1, characterized in that: The first retaining ring (4) is provided with a first groove (4.1), a first oil passage hole (4.2) located at the bottom of the first groove (4.1), a first filter (8) capable of covering the first oil passage hole (4.2), and a first guide vane (4.3) located in the first groove (4.1); the first guide vanes (4.3) on the two first retaining rings (4) are arranged in the same direction.

3. The bearing with filtering function according to claim 1, characterized in that: The second retaining ring (5) is provided with a second groove (5.1), a second oil passage hole (5.2) located at the bottom of the second groove (5.1), a second filter screen (9) capable of covering the second oil passage hole (5.2), and a second guide vane (5.3) located in the second groove (5.1); the second guide vanes (5.3) on the two second retaining rings (5) are arranged in the same direction.

4. The bearing with filtering function according to claim 1, characterized in that: The first retaining ring (4) is provided with a first groove (4.1), a first oil passage hole (4.2) located at the bottom of the first groove (4.1), a first filter (8) capable of covering the first oil passage hole (4.2), and a first guide vane (4.3) located in the first groove (4.1); the first guide vanes (4.3) on the two first retaining rings (4) are arranged in the same direction; The second retaining ring (5) is provided with a second groove (5.1), a second oil passage hole (5.2) located at the bottom of the second groove (5.1), a second filter screen (9) capable of covering the second oil passage hole (5.2), and a second guide vane (5.3) located in the second groove (5.1); the second guide vanes (5.3) on the two second retaining rings (5) are arranged in the same direction.

5. A bearing with filtering function according to any one of claims 2 to 4, characterized in that: The oil hole is located close to the position where the corresponding guide vane is connected to the groove bottom.

6. The bearing with filtering function according to claim 1, characterized in that: The first retaining ring (4) and the second retaining ring (5) are also slidably connected via an anti-misalignment structure.

7. The bearing with filtering function according to claim 6, characterized in that: The anti-misalignment structure comprises a circle of protrusions (4.4) arranged on the inner side of the first retaining ring (4) and a circle of clamping grooves (5.4) arranged on the outer side of the second retaining ring (5), the protrusions (4.4) and the grooves forming a sliding clamping connection.

8. The bearing with filtering function according to claim 7, characterized in that: The protrusion (4.4) has a head and a neck, the width of the head is greater than the width of the neck; the groove has an opening and a receiving portion, the opening matches the neck, and the receiving portion matches the head.

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