Self-lubricating needle bearing

Abstract

The utility model relates to the technical field of needle bearings, in particular to a self-lubricating needle bearing which comprises a bearing inner ring, a first ring groove used for containing lubricating agents and a second ring groove used for containing bearing rollers, N first through holes are formed between the second ring groove and the first ring groove, and N second through holes are formed between the second ring groove and the first ring groove. A plurality of second through holes are formed in the side, away from the first ring groove, of the second ring groove, and N is an integer larger than or equal to 1; the cover piece is arranged on the inner ring of the bearing and covers the outer ring of the first ring groove; the side sealing piece is arranged on the bearing inner ring and covers the second through holes, the bearing inner ring is further provided with a plurality of third through holes, and the side sealing piece is provided with a plurality of flow guide holes communicating with the second through holes and the third through holes correspondingly; the plurality of bearing rollers are uniformly arranged in the second ring groove; and the bearing outer rings are arranged on the bearing roller outer rings in a surrounding manner. The utility model relates to a self-lubricating needle bearing, which aims to solve the problems that the self-lubricating needle bearing in the prior art consumes lubricating liquid quickly, and the bearing characteristic is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of needle roller bearings, and more specifically, to a self-lubricating needle roller bearing. Background Art

[0002] Needle roller bearings are roller bearings with cylindrical rollers. Relative to their diameter, the rollers are thin and long. This type of roller is called a needle roller. Despite its small cross-section, the bearing still has a high load-bearing capacity. Needle roller bearings are equipped with thin and long rollers (roller diameter D≤5mm, L / D≥2.5, L is the roller length), so the radial structure is compact. When its inner diameter size and load capacity are the same as those of other types of bearings, the outer diameter is the smallest, which is particularly suitable for support structures with limited radial installation dimensions.

[0003] The Chinese utility model patent with announcement number CN215333974U discloses a self-lubricating needle roller bearing, including an outer ring, a retaining frame is arranged on the inner side of the outer ring, and a plurality of needle rollers used in conjunction with the retaining frame are arranged on the inner side of the outer ring, the outer ring is a hollow structure, and lubricating liquid is arranged in the hollow layer of the outer ring, a plurality of liquid outlet pipes are arranged on the inner wall of the outer ring, and the plurality of liquid outlet pipes are interconnected with the hollow layer of the outer ring, and corresponding ends of the plurality of liquid outlet pipes are connected with lubricating pipes, the surface walls of the plurality of lubricating pipes are provided with a plurality of through holes, and lubricating cotton balls are sleeved on the plurality of lubricating pipes, the plurality of lubricating cotton balls are respectively located between each two adjacent needle rollers among the plurality of needle rollers, and the outer wall of the lubricating cotton ball is in contact with the outer wall of the two adjacent needle rollers.

[0004] However, in subsequent tests, it was found that the design had the problem of rapid consumption of lubricating fluid, and the connection method of the design, specifically the outer ring liquid outlet pipe, lubrication tube and lubricating cotton ball placed between two adjacent needle rollers, would affect the load-bearing characteristics of the bearing during actual use, making the self-lubricating needle roller bearing generally unsuitable for actual use. Utility Model Content

[0005] The main purpose of the utility model is to provide a self-lubricating needle roller bearing, aiming to solve the problems of fast lubricating fluid consumption and reduced load-bearing characteristics of the self-lubricating needle roller bearing in the prior art.

[0006] In order to solve the above technical problems, a self-lubricating needle roller bearing is proposed, comprising: a bearing inner ring, provided with a first annular groove for placing a lubricant, provided with a second annular groove for accommodating a bearing roller, N first through holes are provided between the second annular groove and the first annular groove, and a plurality of second through holes are provided on a side of the second annular groove away from the first annular groove, where N is an integer greater than or equal to 1;

[0007] A cover member, disposed on the inner ring of the bearing and covering the outer ring of the first ring groove;

[0008] A side seal is provided on the inner ring of the bearing and covers each of the second through holes. The inner ring of the bearing is also provided with a plurality of third through holes. The side seal is provided with a plurality of guide holes respectively connected with each of the second through holes and each of the third through holes.

[0009] A plurality of the bearing rollers are evenly arranged in the second ring groove;

[0010] The bearing outer ring is arranged around the outer rings of each bearing roller.

[0011] In any of the above technical solutions, further, the second annular groove is symmetrically arranged with respect to the first annular groove in two;

[0012] Two side seals are provided, and the two side seals are symmetrically arranged on both sides of the bearing inner ring.

[0013] In any of the above technical solutions, further, the distance between the first through hole and the axis center of the inner ring of the bearing is greater than the distance between the first through hole and the axis center of the inner ring of the bearing.

[0014] In any of the above technical solutions, further, it also includes a first annular member;

[0015] The first annular member is disposed in the first annular groove, and the first annular member is placed between each of the first through holes and the first annular groove. The first annular member is used to slow down the circulation speed of the lubricant.

[0016] In any of the above technical solutions, further, the distance between the second through hole and the bearing inner ring gradually increases in a direction away from the second annular groove.

[0017] In any of the above technical solutions, further, it also includes a second annular member;

[0018] A third ring groove is provided on a side of the second ring groove away from the first ring groove, each of the second through holes is connected to the second ring groove through the third ring groove, and the second ring member is provided in the third ring groove, and the second ring member is used to slow down the circulation speed of the lubricant.

[0019] The beneficial effects are:

[0020] 1. The self-lubricating needle roller bearing of the utility model forms a lubricant circulation circuit between the bearing roller and the inner ring of the bearing through the first ring groove, the first through hole, the second ring groove of the bearing inner ring, the guide hole of the side seal and the third through hole and the second through hole of the bearing inner ring, thereby ensuring the lubrication effect;

[0021] 2. Lubricant is placed in the first annular groove. When the bearing is in a static state, each bearing roller can form a sealing effect on the first annular groove to a certain extent; when the bearing is in a dynamic state, the lubricant flows into the second annular groove through the first through hole to lubricate the bearing roller. At this time, the lubricant in the second annular groove is subjected to the dual effects of centrifugal force and roller extrusion, which will cause a part of the lubricant to move back to the second annular groove through the second through hole, the guide hole and the third through hole, thereby saving usage and reducing waste;

[0022] 3. The inner ring of the bearing and the inner ring of the bearing pass through the bearing roller, and each hole structure is hidden in the structure, which has limited damage to the bearing's load-bearing capacity and ensures the bearing's load-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the exploded structure of a self-lubricating needle roller bearing of the utility model;

[0025] Figure 2 The utility model is a partial structural schematic diagram of a self-lubricating needle roller bearing.

[0026] The following are the descriptions of the reference numerals:

[0027] 1. Bearing inner ring; 101. First ring groove; 102. Second ring groove; 103. First through hole; 104. Second through hole; 105. Third through hole;

[0028] 2. Cover;

[0029] 3. Side seal; 301. Diversion hole;

[0030] 4. Bearing rollers;

[0031] 5. Bearing outer ring;

[0032] 6. a first annular member;

[0033] 7. Second annular member. DETAILED DESCRIPTION

[0034] Below, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0035] It should be noted that, as shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

[0036] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0039] The utility model proposes a self-lubricating needle roller bearing, which forms a circulation circuit of a first annular groove, a first through hole, a second annular groove, a second through hole, a guide hole and a third through hole through a hole structure on a bearing inner ring and a side seal. The lubricant can be retained in the first annular groove in a static state, and the lubricant can be recovered while lubricating the bearing rollers in a dynamic state, thereby reducing the loss of the lubricant.

[0040] A self-lubricating needle roller bearing of the present application is described in detail through the following embodiments.

[0041] In this embodiment, if Figure 1 and Figure 2 As shown, the self-lubricating needle roller bearing comprises: a bearing inner ring 1, provided with a first annular groove 101 for placing lubricant, provided with a second annular groove 102 for accommodating a bearing roller 4, N first through holes 103 are provided between the second annular groove 102 and the first annular groove 101, and a plurality of second through holes 104 are provided on a side of the second annular groove 102 away from the first annular groove 101, where N is an integer greater than or equal to 1;

[0042] A cover 2, arranged on the bearing inner ring 1, covering the outer ring of the first ring groove 101;

[0043] The side seal 3 is provided on the bearing inner ring 1 and covers each second through hole 104. The bearing inner ring 1 is also provided with a plurality of third through holes 105. The side seal 3 is provided with a plurality of guide holes 301 respectively connecting each second through hole 104 and each third through hole 105.

[0044] A plurality of bearing rollers 4 are evenly arranged in the second annular groove 102;

[0045] The bearing outer ring 5 is arranged around the outer ring of each bearing roller 4 .

[0046] In this technical solution, for the sake of convenience, the bearing is set vertically, and the central axis of the bearing is horizontal in the left and right directions. The inner ring 1, cover 2, side seal 3 and outer ring 5 of the bearing are all circumferentially symmetrical structures and are coaxially arranged. The two second ring grooves 102 and the two side seals 3 can improve the symmetry and stability of the structure. The technical solution of the two second ring grooves 102 and the two side seals 3 is directly described, but one second ring groove 102 and one side seal 3 can also realize the technical solution of this application.

[0047] The first annular groove 101 is located at the center of the bearing inner ring 1, and the two second annular grooves 102 are symmetrically located on the left and right sides of the first annular groove 101. There is a side wall of the bearing inner ring 1 between the first annular groove 101 and the second annular groove 102, so that the first annular groove 101 and the second annular groove 102 are not directly connected. The cover 2 is an annular structure, which covers the circumference of the first annular groove 101. After covering, the first annular groove 101 forms a sealed annular inner cavity, and the distance between the top surface (outer ring surface) of the inner cavity and the bearing axis is greater than the distance between the bottom surface of the second annular groove 102 and the bearing axis, and the distance between the bottom surface (inner ring surface) of the first annular groove 101 and the bearing axis is less than the distance between the bottom surface of the second annular groove 102 and the bearing axis.

[0048] The first through hole 103 is located near the outer ring surface of the first ring groove 101, and the first ring groove 101 and the second ring groove 102 are directly connected through the first through hole 103. The third through hole 105 is located at the inner ring surface of the first ring groove 101 and is located on the side of the second ring groove 102 close to the bearing axis, and the third through hole 105 is not directly connected to the second ring groove 102.

[0049] The second through hole 104 is located on the side of the second annular groove 102 away from the first annular groove 101 and extends to the left, that is, the second through hole 104 is located near the left and right sides of the inner ring 1 of the bearing. The guide holes 301 are arranged in the side seal 3, and are set to be equal in number to the second through hole 104 and the third through hole 105, and the three are arranged one by one. Specifically, the second through hole 104, the third through hole 105 and the guide hole 301 are evenly arranged on the circumference to 18, that is, 18 channels for the second annular groove 102 to flow to the first annular groove 101 can be formed on the bearing.

[0050] The first annular groove 101 is arranged at a central position, and a first annular groove 101 is arranged on each of the left and right sides, so that the lubricant can move evenly into the two second annular grooves 102 with the help of fluidity, and can be easily recovered through the second through hole 104 arranged at the second annular groove 102 after movement.

[0051] In some technical solutions, a plurality of guide holes 301 on the side sealing member 3 may be integrated into an annular groove.

[0052] In this technical solution, the number of the first through holes 103 is evenly arranged around the circumference to be 12.

[0053] In this embodiment, the distance between the first through hole 103 and the axis center of the bearing inner ring 1 is greater than the distance between the first through hole 103 and the axis center of the bearing inner ring 1 .

[0054] In the technical solution, such a setting can achieve the purpose of forming the first through hole 103 as the outlet of the lubricant and the second through hole 104 as the inlet of the lubricant in actual use. Specifically, in the bearing rotating at high speed, the lubricant is thrown to the side close to the cover 2 under the action of centrifugal force. At this time, the pressure of the inner and outer rings of the first annular groove 101 is greater than the pressure of the inner ring, so that the lubricant can be easily moved into the second annular groove 102 through the first through hole 103; and at the same time, the pressure of the inner ring is relatively small, which can affect the second through hole 104 to a certain extent, and promote the formation of reflux.

[0055] In this embodiment, it also includes a first annular member 6;

[0056] The first annular member 6 is disposed in the first annular groove 101 , and the first annular member 6 is placed between each first through hole 103 and the first annular groove 101 . The first annular member 6 is used to slow down the circulation speed of the lubricant.

[0057] In the present technical solution, the first arc-shaped member and the subsequent second arc-shaped member are both configured as flexible members such as sponges and cotton cloths, which can absorb lubricants on the one hand and reduce the flow speed without affecting the flow on the other hand. The first annular member 6 is disposed in the first annular groove 101, and the outer diameter of the first annular member 6 is equal to the inner diameter of the cover 2, so that the first annular member 6 can be fixed in the first annular groove 101 with the help of the cover 2, and at this time, the left and right sides of the first annular member 6 are respectively covered on the first through holes 103 on both sides, so that the lubricant in the first annular groove 101 can flow to the second annular groove 102 after passing through the first annular member 6.

[0058] In this embodiment, the distance between the second through hole 104 and the bearing inner ring 1 gradually increases in a direction away from the second annular groove 102 .

[0059] In the present technical solution, the second through hole 104 is arranged to be inclined outward, so that the lubricant in the second through hole 104 can be easily moved to the guide hole 301 .

[0060] In this embodiment, a second annular member 7 is also included;

[0061] A third annular groove is provided on one side of the second annular groove 102 away from the first annular groove 101 , and each second through hole 104 is connected to the second annular groove 102 via the third annular groove. The second annular member 7 is provided in the third annular groove, and the second annular member 7 is used to slow down the circulation speed of the lubricant.

[0062] In the present technical solution, the third annular groove is located at the corner of the second annular groove 102 , and the material of the second annular member 7 is the same as the material of the first annular member 6 .

[0063] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A self-lubricating needle roller bearing, characterized in that: include: The inner ring (1) of the bearing is provided with a first annular groove (101) for placing a lubricant, and a second annular groove (102) for accommodating a bearing roller (4), N first through holes (103) are provided between the second annular groove (102) and the first annular groove (101), and a plurality of second through holes (104) are provided on a side of the second annular groove (102) away from the first annular groove (101), where N is an integer greater than or equal to 1; A cover member (2) is arranged on the inner ring (1) of the bearing and covers the outer ring of the first annular groove (101); A side seal (3) is arranged on the bearing inner ring (1) and covers each of the second through holes (104); the bearing inner ring (1) is further provided with a plurality of third through holes (105); and the side seal (3) is provided with a plurality of guide holes (301) respectively connecting each of the second through holes (104) and each of the third through holes (105); A plurality of bearing rollers (4) are evenly arranged in the second annular groove (102); The bearing outer ring (5) is arranged around the outer ring of each of the bearing rollers (4).

2. The self-lubricating needle roller bearing according to claim 1, characterized in that: The second annular grooves (102) are symmetrically arranged in two with respect to the first annular groove (101); Two side seals (3) are provided, and the two side seals (3) are symmetrically arranged on both sides of the bearing inner ring (1).

3. The self-lubricating needle roller bearing according to claim 1, characterized in that: The distance between the first through hole (103) and the axis center of the bearing inner ring (1) is greater than the distance between the first through hole (103) and the axis center of the bearing inner ring (1).

4. The self-lubricating needle roller bearing according to claim 1, characterized in that: Also includes a first annular member (6); The first annular member (6) is arranged in the first annular groove (101), and the first annular member (6) is placed between each of the first through holes (103) and the first annular groove (101), and the first annular member (6) is used to slow down the circulation speed of the lubricant.

5. The self-lubricating needle roller bearing according to claim 1, characterized in that: The distance between the second through hole (104) and the bearing inner ring (1) gradually increases in a direction away from the second annular groove (102).

6. The self-lubricating needle roller bearing according to claim 1, characterized in that: Also includes a second annular member (7); A third annular groove is provided on a side of the second annular groove (102) away from the first annular groove (101); each of the second through holes (104) is connected to the second annular groove (102) via the third annular groove; the second annular member (7) is provided in the third annular groove; and the second annular member (7) is used to slow down the circulation speed of the lubricant.

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