Convenient-to-lubricate high-precision roller bearing for industrial robot articulated arm

Abstract

The utility model discloses a convenient-to-lubricate high-precision roller bearing for an industrial robot articulated arm, and relates to the technical field of bearings. The roller bearing comprises an inner ring, an outer ring is arranged outside the inner ring, roller bodies are evenly arranged between the inner ring and the outer ring, baffle rings are symmetrically arranged above and below the inner ring, movable sealing rings are arranged inside an inner sealing groove and an outer sealing groove, and sealing gaskets are arranged between the outer ring and the baffle rings. Limiting rings are arranged on the upper side and the lower side between the inner ring and the outer ring, annular bosses are fixed to the positions, corresponding to the limiting rings, of the baffle ring, and balls are evenly arranged in the outer supporting groove and the inner supporting groove. Lubricating oil is stored in a closed cavity formed by the baffle rings, the inner ring and the outer ring, loss of the lubricating oil is reduced, meanwhile, the bolts are matched with the corresponding baffle rings to facilitate filling of the lubricating oil, the positions of the two baffles are relatively fixed through the nuts and the connecting rods, and the supporting strength is improved through the balls and the limiting rings.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and in particular relates to a high-precision roller bearing for an industrial robot articulated arm which is easy to lubricate. Background Art

[0002] Industrial robot articulated arms are key components in modern manufacturing and automation. They are typically composed of multiple joints, each of which can rotate on different axes, allowing the robot to achieve high-precision and complex movements. However, the high-precision roller bearings used in achieving this kind of movement play a huge role. Through high-precision roller bearings, the working joints can move flexibly and accurately.

[0003] After searching, the authorization announcement number CN220286227U, the authorization announcement date 2024.01.02, discloses a cylindrical roller bearing that is easy to lubricate, including a bearing body, the bearing body including an outer retaining ring, the outer surface of the outer retaining ring is connected to a lubrication assembly, the inner wall of the outer retaining ring is connected to a roller, and the inner wall of the outer retaining ring is connected to a reinforcement assembly; the lubrication assembly includes a guide groove, an inner connecting piece, and a guide hole, the outer surface of the outer retaining ring is provided with a guide groove, the inner wall of the outer retaining ring is connected to an inner connecting piece, and the outer surface of the inner connecting piece abuts the guide hole. This cylindrical roller bearing that is easy to lubricate can effectively and conveniently form an oil film on the outer surfaces of the outer and inner retaining rings by providing a lubrication assembly, thereby increasing the lubrication effect, and the device can effectively increase the longitudinal force strength of the outer retaining ring by providing a reinforcement assembly.

[0004] The existing technology improves the lubrication effect by forming an oil film on the outer surfaces of the outer guard ring and the inner guard ring. However, in actual use, the amount of oil film generated is small. After long-term operation, the lubricating oil is naturally consumed, resulting in oil shortage. At the same time, it is inconvenient to add lubricating oil. In the existing technology, one end of the first support column is engaged with the outer surface of the inner guard ring, and the other end of the first support column is engaged with the side surface of the outer guard ring, so that the first support column supports the inner guard ring. However, the supporting force when using this method is insufficient. For this reason, we provide a high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a high-precision roller bearing for an industrial robot articulated arm which is easy to lubricate. The lubricating oil is stored in a closed chamber formed by a retaining ring, an inner ring and an outer ring, thereby reducing the loss of the lubricating oil. At the same time, the lubricating oil is easily added by the cooperation of bolts and corresponding retaining rings, and the positions of the two baffles are relatively fixed by nuts and connecting rods. The supporting strength is enhanced by using balls and limit rings, thereby solving the problems of the prior art that the lubricating oil is easily lacking due to the natural loss of the lubricating oil after long-term operation, and it is inconvenient to add the lubricating oil, and the supporting strength of the prior art is insufficient.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model is a high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate, comprising an inner ring, an outer ring being arranged outside the inner ring, roller bodies being evenly arranged between the inner ring and the outer ring, retaining rings being symmetrically arranged above and below the inner ring, inner sealing grooves being provided on the upper and lower walls of the inner ring, outer sealing grooves being provided on the retaining rings corresponding to the positions of the inner sealing grooves, dynamic sealing rings being provided inside the inner and outer sealing grooves, and a sealing gasket being provided between the outer ring and the retaining rings;

[0008] Limiting rings are provided on the upper and lower sides between the inner ring and the outer ring, an annular boss is fixed on the retaining ring corresponding to the position of the limiting ring, an outer supporting groove is provided on the annular boss close to the side of the limiting ring, an inner supporting groove is provided on the limiting ring corresponding to the position of the outer supporting groove, and balls are evenly arranged in the outer supporting groove and the inner supporting groove.

[0009] The present invention is further configured such that a bolt is threadedly connected to the retaining ring corresponding to the position where the roller body is located.

[0010] The utility model is further configured such that a connecting rod is evenly fixed to the upper wall of the retaining ring located on the lower side, and the upper end of the connecting rod extends above the retaining ring located on the upper side, and a nut is connected to the external thread of the upper end of the connecting rod.

[0011] The present invention is further configured such that an installation groove is provided on the inner peripheral wall of the outer ring, and the roller body is located on the inner side of the installation groove.

[0012] The present invention is further configured such that protrusions are evenly fixed on the lower wall of the limit ring on the upper side, and limit platforms are equidistantly fixed on the upper wall of the limit ring on the lower side, and the limit platforms and the roller bodies are alternately arranged.

[0013] The present invention is further configured such that the protrusion is inserted into the interior of the corresponding limiting platform, and the protrusion and the limiting platform are loosely matched.

[0014] The utility model has the following beneficial effects:

[0015] The utility model provides a retaining ring, a dynamic sealing ring and a bolt, and cooperates with the inner ring, the outer ring, the retaining ring and the sealing gasket to make the space in which the roller body is located a closed space. Lubricating oil is built into the space, which can provide lubrication protection for the roller body when it rotates, thereby reducing the wear of the roller body. At the same time, since the space is closed, the lubricating oil loss is small and it is not easy to cause oil shortage. Lubricating oil can be added to the closed space by removing the bolts, making the filling of lubricating oil more convenient, solving the problem of the prior art that the lubricating oil is naturally lost after long-term operation, resulting in easy oil shortage, and it is relatively inconvenient to add lubricating oil.

[0016] The utility model provides balls and limit rings. When in use, the two retaining rings are relatively fixed with the cooperation of the connecting rod and the nut. At this time, the inner ring can only rotate, and the roller body can only rotate along the inside of the installation groove. In this state, the two retaining rings are fixed to the outer ring to limit the movement trajectory of the inner ring and the roller body, thereby improving the supporting strength when axial force is applied, and solving the problem of insufficient supporting strength during support in the prior art.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 The overall structure diagram of a high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate.

[0020] Figure 2 The cross-sectional structure diagram of a high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate.

[0021] Figure 3 This is an exploded structural diagram of a high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate.

[0022] Figure 4 This diagram shows the internal structure of a high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate.

[0023] Figure 5 for Figure 4Exploded view of some of the structures in .

[0024] Figure 6 for Figure 5 A structural diagram from another perspective.

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] 1- retaining ring, 101- bolt, 102- connecting rod, 102a- nut, 103- sealing gasket, 104- annular boss, 104a- outer support groove, 105- outer sealing groove, 2- inner ring, 201- inner sealing groove, 3- outer ring, 301- mounting groove, 4- roller body, 5- ball, 6- limiting ring, 601- inner support groove, 602- limiting platform, 603- protrusion, 7- dynamic sealing ring. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0028] Example 1, please refer to Figure 1-4 The utility model is a high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate, comprising an inner ring 2, an outer ring 3 being arranged outside the inner ring 2, and roller bodies 4 being evenly arranged between the inner ring 2 and the outer ring 3. When the inner ring 2 and the outer ring 3 rotate relative to each other, the roller bodies 4 rotate synchronously. Retaining rings 1 are symmetrically arranged above and below the inner ring 2. Preferably, the inner diameter of the retaining ring 1 is slightly larger than the inner diameter of the inner ring 2, and the outer diameter of the retaining ring 1 is smaller than the outer diameter of the outer ring 3 to avoid affecting normal installation. Inner sealing grooves 201 are provided on the upper and lower walls of the inner ring 2, and the opening on the retaining ring 1 corresponding to the position where the inner sealing groove 201 is located is provided. An outer sealing groove 105 is provided, and the inner sealing groove 201 and the outer sealing groove 105 have the same specifications, providing installation space for the dynamic sealing ring 7. The dynamic sealing ring 7 is provided inside the inner sealing groove 201 and the outer sealing groove 105. The dynamic sealing ring 7 can adopt a wear-resistant and high-temperature resistant elastic rubber O-ring, that is, a sealing ring used in a rotary seal. A sealing gasket 103 is provided between the outer ring 3 and the retaining ring 1 to prevent lubricating oil from leaking between the outer ring 3 and the retaining ring 1. At the same time, since the sealing gasket 103 is elastic, when the outer ring 3 and the retaining ring 1 do not fit together during the production process, the sealing gasket 103 can compensate for the error in production;

[0029] Specifically, a bolt 101 is threadedly connected to the retaining ring 1 corresponding to the position where the roller body 4 is located. By removing the bolt 101, lubricating oil can be injected into the space where the roller body 4 is located. At the same time, a sealing sheet is provided when the bolt 101 is connected to the retaining ring 1 to prevent leakage of lubricating oil and to avoid the phenomenon of self-rotation of the bolt 101 due to vibration during operation.

[0030] The upper wall of the retaining ring 1 on the lower side is evenly fixed with a connecting rod 102, and the upper end of the connecting rod 102 extends to the upper side of the retaining ring 1 on the upper side. Preferably, the retaining ring 1 and the outer ring 3 are both clearance-fitted with the connecting rod 102, and the external thread of the upper end of the connecting rod 102 is connected with a nut 102a. By tightening the nut 102a, the high-precision roller bearing for the joint arm of an industrial robot that is easy to lubricate can be disassembled for maintenance;

[0031] The operation process of this embodiment is as follows: in the use state, the inner ring 2 and the outer ring 3 rotate relative to each other, and under the action of the connecting rod 102 and the nut 102a, the retaining ring 1 and the outer ring 3 are relatively fixed, and at the same time, the roller body 4 rotates synchronously;

[0032] When lubricating oil needs to be added, the operating bolt 101 is rotated to expose the screw hole, and lubricating oil can be added to the space where the roller body 4 is located through the screw hole. After the lubricating oil is added, the operating bolt 101 is threadedly connected to the corresponding retaining ring 1 and tightened.

[0033] Example 2, please refer to Figure 1-6 , which is the second embodiment of the present utility model. This embodiment is based on the previous embodiment, but differs from the first embodiment in that: limit rings 6 are provided on the upper and lower sides between the inner ring 2 and the outer ring 3, and an annular boss 104 is fixed on the corresponding retaining ring 1 at the position where the limit ring 6 is located. An outer supporting groove 104a is provided on the side of the annular boss 104 close to the limit ring 6, and an inner supporting groove 601 is provided on the corresponding limit ring 6 at the position where the outer supporting groove 104a is located. Balls 5 are evenly arranged in the outer supporting groove 104a and the inner supporting groove 601, and the balls 5 are distributed in the corresponding outer supporting groove 104a and the inner supporting groove 601;

[0034] Specifically, the inner circumferential wall of the outer ring 3 is provided with a mounting groove 301, and the roller body 4 is located inside the mounting groove 301, and the mounting groove 301 is adapted to the roller body 4;

[0035] The lower wall of the upper limiting ring 6 is evenly fixed with protrusions 603, and the upper wall of the lower limiting ring 6 is evenly fixed with limiting platforms 602, and the limiting platforms 602 are alternately arranged with the roller bodies 4. The limiting ring 6 and the limiting platforms 602 cooperate to form a retainer of the roller bodies 4 in the prior art, which is used to limit the position between the roller bodies 4.

[0036] The protrusion 603 is inserted into the corresponding limiting platform 602, and the protrusion 603 and the limiting platform 602 are loosely matched. The above arrangement can limit the position between the two limiting rings 6;

[0037] The rest of the structure is the same as that of Example 1;

[0038] The operating process of this embodiment is: when the nut 102a is locked, the positions of the two retaining rings 1 are relatively fixed, and the position of the outer ring 3 is relatively fixed. At this time, the two retaining rings 1 limit the position of the inner ring 2, so that the inner ring 2 can only rotate in the original position, and the roller body 4 can rotate relative to the outer ring 3 and the inner ring 2, thereby increasing the supporting force on the roller body 4 and the inner ring 2.

[0039] When assembling the high-precision roller bearing for the articulated arm of an industrial robot that is easy to lubricate, the retaining ring 1 on the lower side is placed on the platform, and the connecting rod 102 is set upward. The sealing gasket 103 passes through the connecting rod 102 and contacts the upper wall of the retaining ring 1 on the lower side. Then, the outer ring 3 passes through the connecting rod 102 and contacts the sealing gasket 103 on the lower side. At this time, the operating ball 5 is laid flat in the outer support groove 104a on the lower side. Then, the limiting ring 6 on the lower side is installed so that the ball 5 is located in the corresponding outer support groove 104a and inner support groove 601.

[0040] Then install the roller body 4 so that the roller body 4 is alternately arranged between the limit platforms 602 and the roller body 4 is located on the inner side of the installation groove 301. Then operate the limit ring 6 on the upper side so that the protrusion 603 is inserted into the limit platform 602. Then, according to the above installation steps, install the ball 5, inner ring 2, dynamic sealing ring 7, sealing gasket 103 on the upper side and retaining ring 1 on the upper side in turn, and finally tighten the bolt 101.

[0041] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0042] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate, comprising an inner ring (2), characterized in that: An outer ring (3) is provided on the outside of the inner ring (2), a roller body (4) is evenly provided between the inner ring (2) and the outer ring (3), retaining rings (1) are symmetrically provided above and below the inner ring (2), an inner sealing groove (201) is provided on the upper wall and the lower wall of the inner ring (2), an outer sealing groove (105) is provided on the retaining ring (1) corresponding to the position of the inner sealing groove (201), a dynamic sealing ring (7) is provided inside the inner sealing groove (201) and the outer sealing groove (105), and a sealing gasket (103) is provided between the outer ring (3) and the retaining ring (1); Limiting rings (6) are provided on both upper and lower sides between the inner ring (2) and the outer ring (3); an annular boss (104) is fixed on the retaining ring (1) corresponding to the position where the limiting ring (6) is located; an outer supporting groove (104a) is provided on the side of the annular boss (104) close to the limiting ring (6); an inner supporting groove (601) is provided on the limiting ring (6) corresponding to the position where the outer supporting groove (104a) is located; and balls (5) are evenly provided in the outer supporting groove (104a) and the inner supporting groove (601).

2. The high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate according to claim 1, characterized in that: A bolt (101) is threadedly connected to the retaining ring (1) corresponding to the position where the roller body (4) is located.

3. The high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate according to claim 1, characterized in that: A connecting rod (102) is evenly fixed to the upper wall of the retaining ring (1) located on the lower side, and the upper end of the connecting rod (102) extends above the retaining ring (1) located on the upper side. The outer end of the upper end of the connecting rod (102) is threadedly connected to a nut (102a).

4. The high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate according to claim 1, characterized in that: The inner peripheral wall of the outer ring (3) is provided with a mounting groove (301), and the roller body (4) is located inside the mounting groove (301).

5. The high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate according to claim 1, characterized in that: The lower wall of the limiting ring (6) located on the upper side is evenly fixed with protrusions (603), the upper wall of the limiting ring (6) located on the lower side is equidistantly fixed with limiting platforms (602), and the limiting platforms (602) and the roller bodies (4) are alternately arranged.

6. The high-precision roller bearing for an industrial robot articulated arm that is easy to lubricate according to claim 5, characterized in that: The protrusion (603) is plugged into the interior of the corresponding limiting platform (602), and the protrusion (603) and the limiting platform (602) are clearance-matched.

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