Planet wheel bearing

Abstract

The utility model discloses a planet wheel bearing which comprises an outer ring, two inner rings and double rows of rollers axially arranged along the inner circumferential wall of the outer ring, one row of rollers corresponds to the outer circumferential wall of one inner ring, the outer ring is provided with an upper check ring and a lower check ring, the upper check ring corresponds to the rollers close to the upper end face of the bearing, and the lower check ring corresponds to the rollers close to the lower end face of the bearing. The lower check ring is arranged corresponding to the roller close to the lower end face of the bearing, the check ring is detachably connected with the inner circumferential wall of the outer ring, the check ring is provided with an opening, and the planet wheel bearing is convenient to disassemble and assemble, good in stability and simple in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a planetary gear bearing. Background Art

[0002] Bearings are indispensable components in mechanical equipment. There are various types of bearings, and different bearings can play different roles and achieve different effects in mechanical equipment. Planetary gear bearings are an important part of the entire planetary gear train. The planetary gear train can be like a galaxy. Although the number of bearings it contains is large, the structure of the planetary gear bearing is special. This special structure enables a correlation between each bearing. Existing planetary gear bearings generally consist of a single row of rollers and a single inner ring to form a single-layer bearing. In special environments, this single-layer bearing cannot meet the requirements, with a slow running speed and low working efficiency. Although existing double-layer planetary gear bearings have a high rotation speed, when the rollers roll, they are prone to generating relatively large noise, and the double-layer rollers have poor stability and a short service life. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a planetary gear bearing, which is convenient for disassembly and assembly, has good stability, and a simple structure.

[0004] To achieve the above object, the utility model provides a planetary gear bearing, including an outer ring, two inner rings, and a double row of rollers axially arranged along the inner peripheral wall of the outer ring. One row of the rollers is arranged corresponding to the outer peripheral wall of one inner ring. The outer ring is provided with an upper retaining ring and a lower retaining ring. The upper retaining ring is arranged corresponding to the rollers close to the upper end face of the bearing, and the lower retaining ring is arranged corresponding to the rollers close to the lower end face of the bearing. The retaining rings are detachably connected to the inner peripheral wall of the outer ring, and the retaining rings have openings.

[0005] The effects that can be produced by adopting the above technical solution are as follows: By axially arranging a double row of rollers on the inner peripheral wall of the outer ring of the bearing, the double row of rollers has a higher load-bearing capacity and higher working efficiency compared with a single row of rollers. The detachable connection design of the retaining rings and the inner peripheral wall of the outer ring makes the retaining rings of the bearing more convenient to disassemble, replace, improve the maintenance efficiency, reduce the maintenance cost, and make the repair more convenient. The retaining rings are provided with openings. Since the retaining rings need to be installed on the inner peripheral wall of the outer ring, the openings enable the two ends of the opening of the retaining ring to expand and contract towards the opening after being pressed, that is, pressing causes the retaining ring to deform and then install the retaining ring on the inner peripheral wall of the outer ring. The installed retaining ring can be restored and abutted against the inner peripheral wall of the rollers, improving the connection strength. By respectively arranging an upper retaining ring and a lower retaining ring on the upper end face and the lower end face of the bearing, the rollers can be more effectively fixed, preventing the rollers from axially moving inside the bearing, thereby improving the stability and reliability of the bearing.

[0006] The present utility model is further provided with: a retaining ring groove is circumferentially formed in the peripheral wall of the outer ring corresponding to the position of the retaining ring, and a part of the retaining ring is embedded in the retaining ring groove.

[0007] The effects that can be achieved by adopting the above technical solution are: by providing the retaining ring groove, the retaining ring can be more stable after being connected to the peripheral wall of the outer ring, the connection strength is improved, the inner wall of the retaining ring groove can provide support for the retaining ring, the strength of the retaining ring is enhanced, the structure is simple, and the installation is convenient.

[0008] The present utility model is further provided with: a magnetic film is circumferentially arranged on the inner wall of the outer ring corresponding to the retaining ring groove, and the retaining ring is a metal retaining ring that can be adsorbed by the magnetic film.

[0009] The effects that can be achieved by adopting the above technical solution are: circumferentially arranging the magnetic film on the inner peripheral wall of the retaining ring groove can prevent the retaining ring from being easily worn when connected to the retaining ring groove, and the magnetism of the magnetic film can adsorb the metal retaining ring to perform preliminary positioning of the retaining ring, making the installation more convenient. The magnetic film can also reduce the vibration and noise of the retaining ring in the retaining ring groove.

[0010] The present utility model is further provided with: a separation ring is arranged between the two inner rings, one inner ring is placed at the upper end of the separation ring, and the other inner ring is placed at the lower end of the separation ring.

[0011] The effects that can be achieved by adopting the above technical solution are: by providing the separation ring, the direct contact between the two inner rings can be reduced, thereby reducing wear and extending the service life of the equipment. The separation ring can reduce the vibration generated when the rollers roll. Since this planetary gear bearing is a bearing with two groups of rollers, the vibration generated when the rollers roll is likely to have a greater impact on the bearing. The separation ring can reduce the impact of vibration on the bearing and improve stability.

[0012] The present utility model is further provided with: the outer ring is a planetary gear outer ring, and tooth patterns are uniformly arranged on the outer peripheral wall of the planetary gear outer ring.

[0013] The effects that can be achieved by adopting the above technical solution are: by setting the outer ring as a planetary gear outer ring and uniformly arranging tooth patterns on its outer peripheral wall, the connection accuracy between the outer ring and external equipment can be higher, the connection is more stable, and the transmission efficiency is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a cross-sectional view of an embodiment of the present utility model;

[0015] Figure 2 is a three-dimensional view of a retaining ring in an embodiment of the present utility model;

[0016] Figure 3 is a three-dimensional view of an embodiment of the present utility model;

[0017] Figure 4 This is a partial enlarged view of the retaining ring groove in the embodiment of the present utility model. Detailed implementation manners

[0018] An embodiment of a planetary gear bearing of the present utility model is shown in the figure, including an outer ring 1, two inner rings 2, and a double row of rollers 3 axially arranged along the inner circumferential wall of the outer ring 1. One row of the rollers 3 is arranged corresponding to the outer circumferential wall of one inner ring 2. The outer ring 1 is provided with an upper retaining ring 4 and a lower retaining ring 5. The upper retaining ring 4 is arranged corresponding to the rollers 3 near the upper end face of the bearing, and the lower retaining ring 5 is arranged corresponding to the rollers 3 near the lower end face of the bearing. The retaining rings are detachably connected to the inner circumferential wall of the outer ring 1. The retaining rings have openings 6. By axially arranging a double row of rollers 3 on the inner circumferential wall of the outer ring 1 of the bearing, the double row of rollers 3 has a higher load-carrying capacity and higher working efficiency compared with a single row of rollers 3. The detachable connection design of the retaining rings and the inner circumferential wall of the outer ring 1 makes it more convenient to disassemble, replace, and maintain the retaining rings of the bearing, improving the maintenance efficiency, reducing the maintenance cost, and making the repair more convenient. The retaining rings are provided with openings 6. Since the retaining rings need to be installed on the inner circumferential wall of the outer ring 1, the openings 6 enable the two ends of the opening 6 of the retaining ring to expand and contract towards the opening 6 after being pressed, that is, pressing causes the retaining ring to deform and then install the retaining ring on the inner circumferential wall of the outer ring 1. The installed retaining ring can be restored and abutted against the inner circumferential wall of the rollers 3, improving the connection strength. By respectively arranging the upper retaining ring 4 and the lower retaining ring 5 on the upper end face and the lower end face of the bearing, the rollers 3 can be fixed more effectively, preventing the rollers 3 from axially moving inside the bearing, thereby improving the stability and reliability of the bearing; a retaining ring groove 7 is circumferentially opened on the inner circumferential wall of the outer ring 1 corresponding to the position of the retaining ring. The retaining ring is partially embedded in the retaining ring groove 7. The arrangement of the retaining ring groove 7 can make the retaining ring more stable after being connected to the inner circumferential wall of the outer ring 1, improving the connection strength. The inner wall of the retaining ring groove 7 can provide support for the retaining ring, strengthening the strength of the retaining ring; a magnetic film 8 is circumferentially arranged on the inner circumferential wall of the outer ring 1 corresponding to the retaining ring groove 7. The retaining ring is a metal retaining ring that can be adsorbed by the magnetic film 8. Circumferentially arranging the magnetic film 8 on the inner circumferential wall of the retaining ring groove 7 can make it not easy to cause wear to the retaining ring when the retaining ring is connected to the retaining ring groove 7, and the magnetism of the magnetic film 8 can adsorb the metal retaining ring, preliminarily positioning the retaining ring, making the installation more convenient. The magnetic film 8 can also reduce the vibration and noise of the retaining ring in the retaining ring groove 7; a separation ring 9 is arranged between the two inner rings 2. One inner ring 2 is placed on the upper end of the separation ring 9, and the other inner ring 2 is placed on the lower end of the separation ring 9. The arrangement of the separation ring 9 can reduce the direct contact between the two inner rings 2, thereby reducing wear and extending the service life of the equipment. The separation ring 9 can reduce the vibration generated when the rollers 3 roll. Since this planetary gear bearing is a bearing with two groups of rollers 3, the vibration generated when the rollers 3 roll is likely to have a greater impact on the bearing. The separation ring 9 can reduce the impact of the vibration on the bearing, improving the stability; the outer ring 1 is a planetary gear outer ring 1. Tooth patterns 10 are evenly distributed on the outer circumferential wall of the planetary gear outer ring 1. By setting the outer ring 1 as a planetary gear outer ring 1 and evenly distributing tooth patterns 10 on its outer circumferential wall, the connection accuracy between the outer ring 1 and external equipment can be higher, the connection is more stable, and the transmission efficiency is better;When implementing this technical solution, those skilled in the art can install the retaining ring first or install the retaining ring last. When installing the retaining ring, the outer ring 1 of the bearing needs to be placed horizontally on the working station first. Those skilled in the art can press the retaining ring, so that both ends of the retaining ring move towards the opening 6 of the retaining ring and the retaining ring deforms. Then, the retaining ring is embedded in the retaining ring groove 7 of the outer ring 1 of the bearing. At this time, the retaining ring does not return to its original shape under the action of force and can be partially embedded in the retaining ring groove 7. The outer ring 1 of the bearing with the retaining ring installed can axially limit the rollers 3 of the bearing, preventing the rollers 3 of the bearing from axially displacing from the bearing. The magnetic film 8 in the retaining ring groove 7 can adsorb the retaining ring, and the retaining ring can also contact the magnetic film 8 and reduce the generation of vibration and noise. When removing the retaining ring, those skilled in the art can use an external removal tool to squeeze the retaining ring to deform it again and then take out and replace the retaining ring. The operation is convenient and the structure is simple. When installing the two inner rings 2, those skilled in the art first install one inner ring 2 in the bearing, then put in the separating ring 9, and finally place the other inner ring 2 on the other side of the separating ring 9. After completion, the two inner rings 2 can be respectively on both sides of the separating ring 9.;

[0019] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A planetary gear bearing, comprising an outer ring, two inner rings and a double row of rollers axially arranged along the inner peripheral wall of the outer ring, one row of said rollers being arranged corresponding to the outer peripheral wall of one inner ring, characterized in that: An upper retaining ring and a lower retaining ring are arranged on the outer ring. The upper retaining ring corresponds to and is arranged close to the rollers near the upper end face of the bearing, and the lower retaining ring corresponds to and is arranged close to the rollers near the lower end face of the bearing. The retaining rings are detachably connected to the inner peripheral wall of the outer ring, and the retaining rings have openings.

2. The planetary gear bearing according to claim 1, wherein: A retaining ring groove is circumferentially formed in the inner peripheral wall of the outer ring at the position corresponding to the retaining ring, and a part of the retaining ring is embedded in the retaining ring groove.

3. A planetary gear bearing according to claim 1, characterized in that: Magnetic films are circumferentially arranged on the inner wall of the outer ring corresponding to the retaining ring groove, and the retaining rings are metal retaining rings that can be adsorbed by the magnetic films.

4. A planetary gear bearing according to claim 3, characterized in that: A separation ring is arranged between the two inner rings. One inner ring is placed above the separation ring, and the other inner ring is placed below the separation ring.

5. A planetary gear bearing according to claim 1, characterized in that: The outer ring is an outer ring of a planetary gear, and tooth patterns are evenly arranged on the outer peripheral wall of the outer ring of the planetary gear.

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