Combined bearing for electric tool

Abstract

The utility model discloses a combined type bearing for an electric tool, which comprises a bearing outer ring, an inner cylinder is arranged in the bearing outer ring, a roller pin is connected in each vertical groove, first seat sleeves are arranged on the upper surface and the bottom surface of the inner cylinder, a second seat sleeve is sleeved in each first seat sleeve, and the second seat sleeve is connected with the first seat sleeve. Limiting grooves are formed in the upper surface of each first seat sleeve and the upper surface of each second seat sleeve, a retaining ring is connected to the interior of each limiting groove, the retaining rings are connected through connecting rods, and balls are placed in each retaining ring; according to the bearing, the first seat sleeve and the second seat sleeve are arranged, the balls are arranged in the first seat sleeve and the second seat sleeve, and the two groups of balls are rotationally matched with the roller pin, so that the friction between the bearing inner ring and the bearing outer ring is reduced, and lubricating oil is smeared on the surfaces of the balls and the roller pin through the oil inlet holes under the matching of the oil inlet holes; and the lubricity of the balls and the roller pins is improved, so that the abrasion degree of bearing parts is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a combined bearing used for electric tools. Background Art

[0002] Bearings are an important component in contemporary mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy. Bearings are widely used in power tools. Among them, motors cannot work at all without bearings, because the shaft may move in any direction, while the motor requires the shaft to only rotate when it is working. During the rotation of existing combined bearings, friction will continue to occur between the rolling elements and the retaining frame and rings, causing continuous wear of the bearing parts and reducing the service life of the bearing parts. Utility Model Content

[0003] The purpose of the utility model is to provide a combined bearing for electric tools to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined bearing for electric tools, comprising a bearing outer ring, an inner cylinder is placed inside the bearing outer ring, a group of vertical grooves are opened on the outer surface of the inner cylinder, a needle roller is connected to the inside of each of the vertical grooves, a first seat sleeve is provided on the upper surface and the bottom surface of the inner cylinder, a second seat sleeve is sleeved inside each of the first seat sleeves, a limiting groove is opened on the upper surface of each of the first seat sleeves and the second seat sleeves, a retaining ring is connected to the inside of each of the limiting grooves, each of the retaining rings is connected by a connecting rod, a ball is placed inside each of the retaining rings, and the outer surface of each group of the balls contacts the inner side walls of the first seat sleeve and the second seat sleeve.

[0005] Wherein, a first groove is formed on the outer surface of the bearing outer ring, and an oil inlet hole is formed on the outer surface of the first groove.

[0006] Wherein, a bearing inner ring is arranged inside the bearing outer ring, and the bearing inner ring contacts the inner side wall of the inner cylinder.

[0007] Wherein, the upper surface of the bearing outer ring and the bottom surface of the bearing outer ring are both provided with a second groove, and the interior of the bearing outer ring is provided with symmetrical sealing rings, and each of the sealing rings is placed inside the second groove.

[0008] The outer surfaces of a group of the needle rollers are in contact with the outer surfaces of the bearing outer ring and the bearing inner ring respectively, and the bottom surface of each sealing ring is in contact with the outer surface of the ball.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model provides a first seat cover and a second seat cover, wherein balls are arranged inside the first seat cover and the second seat cover, and the two sets of balls rotate together with the needle rollers, thereby reducing the friction between the inner ring of the bearing and the outer ring of the bearing. In addition, with the cooperation of the oil inlet hole, the oil inlet hole applies lubricating oil to the surfaces of the balls and the needle rollers, thereby increasing the lubricity of the balls and the needle rollers, thereby reducing the wear of the bearing parts and increasing the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a three-dimensional diagram of a combined bearing for an electric tool according to the utility model;

[0012] Figure 2 A perspective view of a cross-sectional view of a first seat sleeve in a combined bearing for an electric tool according to the utility model;

[0013] Figure 3 This is a three-dimensional diagram of an inner cylinder of a combined bearing for an electric tool according to the utility model;

[0014] Figure 4 The utility model is a three-dimensional diagram of a ball in a combined bearing for an electric tool.

[0015] In the figure: 1. outer ring of bearing; 2. sealing ring; 3. second seat sleeve; 4. oil inlet hole; 5. first groove; 6. inner ring of bearing; 7. second groove; 8. first seat sleeve; 9. needle roller; 10. vertical groove; 11. ball; 12. inner cylinder; 13. limit groove; 14. connecting rod; 15. retaining ring. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-4The utility model provides a technical solution: a combined bearing for electric tools, including a bearing outer ring 1, an inner cylinder 12 is placed inside the bearing outer ring 1, a group of vertical grooves 10 are opened on the outer surface of the inner cylinder 12, each vertical groove 10 is connected to a needle roller 9, the upper surface of the inner cylinder 12 and the bottom surface of the inner cylinder 12 are provided with a first seat sleeve 8, each first seat sleeve 8 is sleeved with a second seat sleeve 3, each first seat sleeve 8 and the upper surface of the second seat sleeve 3 are provided with a limiting groove 13, each limiting groove 13 is connected to the inner surface Retaining rings 15, each of which is connected by a connecting rod 14, and balls 11 are placed inside each retaining ring 15. The outer surface of each group of balls 11 contacts the inner side wall of the first seat sleeve 8 and the second seat sleeve 3. By setting the first seat sleeve 8 and the second seat sleeve 3, the first seat sleeve 8 and the second seat sleeve 3 are both provided with balls 11. The rotation of the two groups of balls 11 cooperates with the needle roller 9, which reduces the friction between the bearing inner ring 6 and the bearing outer ring 1, thereby reducing the wear of the bearing parts and increasing the service life of the bearing parts.

[0018] Among them, the outer surface of the bearing outer ring 1 is provided with a first groove 5, and the outer surface of the first groove 5 is provided with an oil inlet hole 4. Through the set oil inlet hole 4, the oil inlet hole 4 applies lubricating oil to the surface of the ball 11 and the needle roller 9, thereby increasing the lubricity of the ball 11 and the needle roller 9.

[0019] Among them, the inner ring 6 of the bearing is provided inside the outer ring 1 of the bearing, and the inner ring 6 of the bearing is in contact with the inner wall of the inner cylinder 12. By setting the inner cylinder 12 and cooperating with the needle roller 9, the rotation speed of the outer ring 1 of the bearing and the inner ring 6 of the bearing is improved.

[0020] Among them, the upper surface of the bearing outer ring 1 and the bottom surface of the bearing outer ring 1 are both provided with a second groove 7, and the interior of the bearing outer ring 1 is provided with a symmetrical sealing ring 2, and each sealing ring 2 is placed inside the second groove 7. Through the provided sealing ring 2, the sealing ring 2 seals the ball 11 to prevent the lubricating liquid on the surface of the ball 11 from flowing out.

[0021] Among them, the outer surfaces of a group of needle rollers 9 are in contact with the outer surfaces of the bearing outer ring 1 and the bearing inner ring 6 respectively, and the bottom surface of each sealing ring 2 is in contact with the outer surface of the ball 11. Through the real needle rollers 9, the needle rollers 9 are in contact with the bearing outer ring 1 and the bearing inner ring 6 to facilitate the rotation of the bearing outer ring 1 and the bearing inner ring 6.

[0022] Working principle: When in use, the staff installs two groups of balls 11 inside the retaining ring 15, so that the two groups of balls 11 are in contact with the sealing ring 2, and the lubricating oil in the oil inlet hole 4 lubricates the sealing ring 2 and the balls 11, and the needle roller 9 is in contact with the bearing inner ring 6 and the bearing outer ring 1. When the balls 11 and the needle roller 9 rotate, the friction between the balls 11 and the sealing ring 2 is reduced, and the service life of the needle roller 11 and the balls 9 is increased.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined bearing for an electric tool, comprising a bearing outer ring (1), characterized in that: An inner cylinder (12) is placed inside the outer ring (1) of the bearing. A group of vertical grooves (10) are provided on the outer surface of the inner cylinder (12). A needle roller (9) is connected inside each of the vertical grooves (10). A first seat sleeve (8) is provided on the upper surface of the inner cylinder (12) and the bottom surface of the inner cylinder (12). A second seat sleeve (3) is sleeved inside each of the first seat sleeves (8). A limiting groove (13) is provided on the upper surface of each of the first seat sleeves (8) and the second seat sleeve (3). A retaining ring (15) is connected inside each of the limiting grooves (13). Each of the retaining rings (15) is connected to each other via a connecting rod (14). A ball (11) is placed inside each of the retaining rings (15). The outer surface of each group of the ball sleeves (11) contacts the inner side walls of the first seat sleeve (8) and the second seat sleeve (3).

2. A combined bearing for electric tools according to claim 1, characterized in that: The outer surface of the bearing outer ring (1) is provided with a first groove (5), and the outer surface of the first groove (5) is provided with an oil inlet hole (4).

3. The combined bearing for electric tools according to claim 1, characterized in that: A bearing inner ring (6) is provided inside the bearing outer ring (1), and the bearing inner ring (6) is in contact with the inner side wall of the inner cylinder (12).

4. The combined bearing for electric tools according to claim 1, characterized in that: The upper surface of the bearing outer ring (1) and the bottom surface of the bearing outer ring (1) are both provided with a second groove (7), and the interior of the bearing outer ring (1) is provided with symmetrical sealing rings (2), and each of the sealing rings (2) is placed inside the second groove (7).

5. The combined bearing for electric tools according to claim 4, characterized in that: The outer surfaces of a group of needle rollers (9) are in contact with the outer surfaces of the bearing outer ring (1) and the bearing inner ring (6), respectively, and the bottom surface of each sealing ring (2) is in contact with the outer surface of the ball (11).

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