Planetary gear inner bearing lubricating structure

Abstract

A lubricating structure for a bearing in a planetary gear relates to the technical field of planetary reducers, and is characterized in that an oil baffle plate is arranged on the side edge of a planetary carrier, can store lubricating oil when the planetary carrier rotates, and lubricates the bearing through a lubricating oil hole in a planetary shaft under the action of centrifugal force. In the planet gear inner bearing lubricating structure, an oil baffle plate is arranged on the side edge of a planet carrier, and a single-side blind hole is formed in a planet shaft; the lower end of an inner hole of the oil baffle plate is located below the liquid level of lubricating oil during operation, and the lubricating oil can enter the oil baffle plate and enter the planet shaft under the action of centrifugal force to lubricate a bearing in the planet gear.

Description

Technical Field

[0001] This utility model relates to the field of planetary gear reducer technology, and in particular to a lubrication structure for the internal bearing of a planetary gear. Background Technology

[0002] Currently, bearing lubrication is a crucial factor affecting bearing life. In planetary reducers, needle roller bearings or cylindrical roller bearings are typically arranged inside the planetary gears and between the planetary shafts. However, due to the presence of shims and planet carriers on both sides of the planetary gears, there may be insufficient bearings inside the planetary gears.

[0003] In existing technologies, oil guide holes are typically opened inside the planetary shaft. However, due to the small size of the opening, less lubricating oil enters through the hole, resulting in insufficient lubrication. Alternatively, forced lubrication is used, which involves lubrication through a lubrication pipe. However, this requires an additional forced lubrication mechanism, such as an oil pump, leading to higher application requirements. Utility Model Content

[0004] The purpose of this utility model is to provide a lubrication structure for the bearing inside a planetary gear. It has an oil baffle plate on the side of the planetary carrier, which can store lubricating oil when the planetary carrier rotates, and lubricate the bearing through the lubricating oil hole inside the planetary shaft under the action of centrifugal force.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A planetary gear internal bearing lubrication structure includes: a planetary shaft, a planetary carrier, and an oil baffle.

[0007] The planetary carrier is provided with an oil baffle plate on its side, and the planetary shaft is provided with a blind hole on one side. The lower end of the inner hole of the oil baffle plate is below the lubricating oil level during operation, and the lubricating oil can enter the interior of the oil baffle plate and enter the planetary shaft under the action of centrifugal force to lubricate the inner bearing of the planetary gear.

[0008] In practical applications, the oil baffle adopts a rotating structure and can be used to collect lubricating oil from the lubricating oil stored in the reducer.

[0009] The planetary shaft has a single-sided blind hole, and the side away from the oil baffle is a solid structure.

[0010] Specifically, during installation, the radial lubrication holes of the planetary shaft are arranged along the radial direction of the planet carrier.

[0011] Compared with the prior art, the planetary gear internal bearing lubrication structure of this utility model has the following advantages:

[0012] In the planetary gear internal bearing lubrication structure provided by this utility model, an oil baffle is provided on the side of the planetary carrier, and a single-sided blind hole is provided inside the planetary shaft. The lower end of the inner hole of the oil baffle is below the lubricating oil level during operation, and the lubricating oil can enter the interior of the oil baffle and enter the planetary shaft under the action of centrifugal force to lubricate the internal bearing of the planetary gear. Therefore, during the operation of the planetary carrier, the sun gear serves as the power input of the input shaft and drives the planetary gear to rotate, thereby driving the planetary carrier to rotate and simultaneously lubricating the internal bearing of the planetary gear, thus effectively improving the lubrication performance of the internal bearing of the planetary gear. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of the lubrication structure of the internal bearing of the planetary gear provided in an embodiment of the present invention.

[0014] Figure label:

[0015] 1-Planet shaft; 2-Planet carrier; 3-Oil baffle; 4-Lubricating oil level; 5-Planet gear; 6-Inner bearing; 7-Sun gear. Detailed Implementation

[0016] For ease of understanding, the planetary gear internal bearing lubrication structure provided in the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] This utility model embodiment provides a lubrication structure for the internal bearing of a planetary gear, such as... Figure 1 As shown, it includes: planetary shaft 1, planetary carrier 2, and oil baffle 3;

[0018] The planetary carrier 2 is provided with an oil baffle 3 on its side, and the planetary shaft 1 is provided with a blind hole on one side. The lower end of the inner hole of the oil baffle 3 is below the lubricating oil level 4 during operation, and the lubricating oil can enter the interior of the oil baffle 3 and enter the planetary shaft 1 under the action of centrifugal force to lubricate the inner bearing 6 of the planetary gear 5.

[0019] Compared with the prior art, the planetary gear internal bearing lubrication structure described in this embodiment of the invention has the following advantages:

[0020] In the planetary gear internal bearing lubrication structure provided in this embodiment of the utility model, since the planet carrier 2 is provided with an oil baffle 3 on its side and the planet shaft 1 is provided with a single-sided blind hole; the lower end of the inner hole of the oil baffle 3 is below the lubricating oil level 4 during operation, and the lubricating oil can enter the interior of the oil baffle 3 and enter the planet shaft 1 under the action of centrifugal force to lubricate the internal bearing 6 of the planetary gear 5; therefore, during the operation of the planet carrier 2, the sun gear 7 serves as the power input of the input shaft and drives the planetary gear 5 to rotate, thereby driving the planet carrier 2 to rotate and simultaneously lubricate the internal bearing 6 of the planetary gear 5 (the arrow in the figure indicates the direction of lubricating oil flow), thereby effectively improving the lubrication performance of the planetary gear internal bearing.

[0021] In practical applications, such as Figure 1 As shown, the oil baffle 3 can preferably adopt a rotating body structure, and the oil baffle 3 can be used to collect lubricating oil from the lubricating oil stored in the reducer.

[0022] Among them, such as Figure 1 As shown, the planetary shaft 1 has a blind hole on one side and a solid structure on the side away from the oil baffle 3, which effectively prevents lubricating oil leakage.

[0023] Specifically, such as Figure 1 As shown, when the planetary shaft 1 is installed, the radial lubrication holes of the planetary shaft 1 can be arranged along the radial direction of the planet carrier 2, so as to ensure that the lubricating oil can smoothly enter the radial lubrication holes of the planetary shaft 1 under the action of centrifugal force.

[0024] In summary, the planetary gear internal bearing lubrication structure provided by this utility model embodiment has the following advantages:

[0025] First, the structure is simple. Only a few parts need to be added to the traditional planetary gear train structure to significantly improve the lubrication performance of the bearings inside the planetary gears.

[0026] Second, while improving lubrication performance, there are no other forced lubrication structures such as oil pumps, resulting in lower costs;

[0027] 3. The radial oil holes inside the planetary shaft are aligned with the radial direction of the planetary carrier, which can improve lubrication performance by utilizing centrifugal force.

[0028] Fourth, the planetary shaft has a larger internal axial bore, which improves the flow of lubricating oil and reduces weight.

[0029] V. The installation method is simple.

[0030] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A lubrication structure for an internal bearing of a planetary gear, characterized in that, Comprise: Planet shaft, planet carrier, and oil baffle; The side of the planet carrier is provided with the oil baffle, and the planet shaft is internally provided with a one-side blind hole; the lower end of the inner hole of the oil baffle is below the lubricating oil level during operation, and lubricating oil can enter the inside of the oil baffle and enter the planet shaft under the action of centrifugal force to lubricate the inner bearing of the planet gear.

2. The planetary gear inner bearing lubrication structure according to claim 1, characterized in that, The oil baffle adopts a rotary body structure, and the oil baffle can be used to collect lubricating oil from the stored lubricating oil of the speed reducer.

3. The planetary gear inner bearing lubrication structure according to claim 1 or 2, characterized in that, The planet shaft is internally provided with the one-side blind hole, and is a solid structure on the side away from the oil baffle.

4. The planetary gear inner bearing lubrication structure according to claim 3, characterized in that, During installation, the radial lubricating oil hole of the planet shaft is arranged along the radial direction of the planet carrier.

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