Planetary gear train comprising thin-wall hollow supporting shaft structure

Abstract

The utility model discloses a planetary gear train comprising a thin-wall hollow supporting shaft structure, which comprises a planetary gear train main body, the planetary gear train main body comprises an inner gear ring with the thin-wall hollow supporting shaft structure, and the inner gear ring with the thin-wall hollow supporting shaft structure comprises an inner gear ring body. A thin-wall hollow supporting shaft is coaxially arranged on one side of the inner gear ring body. The inner gear ring body is installed on a gearbox shell. And the thin-wall hollow supporting shaft is in contact with the gearbox shell. According to the planetary gear train, the uniform load performance of the planetary gear train can be effectively improved under the condition that the strength of the planetary gear train is not weakened. According to the planetary gear train, the thin-wall hollow supporting shaft is in the free state, the thin-wall hollow supporting shaft in the free state can provide deformation compensation for the planetary gear train, the defect that the flexibility of the inner gear ring body is insufficient is overcome, and therefore the uniform load state of the planetary gear train is better, vibration noise is smaller, and transmission efficiency is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining truck gearboxes and relates to a planetary gear train, in particular to a planetary gear train comprising a thin-walled hollow support shaft structure. Background Art

[0002] Planetary gear trains can not only realize power distribution, but more importantly, they have higher load-bearing capacity and larger transmission ratios. Therefore, they are widely used in commercial mining truck gearboxes. However, due to the existence of uncertain factors such as manufacturing and installation errors, external vibrations, etc., the load conditions on each planetary gear are often different. The uneven load phenomenon caused by this will cause damage to a certain component and then damage the entire system. In general light-load mechanical structures, a flexible gear ring structure is used to optimize the load-bearing performance of the entire system. However, in mining truck gearboxes, the use of a flexible gear ring will weaken its load-bearing capacity and is not applicable.

[0003] At present, the load-sharing effect of reducers with planetary gearboxes in the field of commercial mining trucks is not ideal. The load-sharing coefficient generally exceeds 1.2. In addition, since the loads of planetary gearboxes used in commercial mining trucks are relatively large, the gear ring cannot be made too flexible. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a planetary gear train including a thin-walled hollow support shaft structure to solve the technical problem that the planetary gear train in the prior art is difficult to achieve both strength and load-sharing performance.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A planetary gear train including a thin-walled hollow support shaft structure comprises a planetary gear train body, wherein the planetary gear train body comprises an inner gear ring having a thin-walled hollow support shaft structure, wherein the inner gear ring having a thin-walled hollow support shaft structure comprises an inner gear ring body, and a thin-walled hollow support shaft is coaxially arranged on one side of the inner gear ring body.

[0007] The utility model also has the following technical features:

[0008] The inner gear ring body and the thin-walled hollow support shaft are integrally formed.

[0009] The inner diameter of the thin-walled hollow support shaft is larger than the inner diameter of the inner gear ring body, and the outer diameter of the thin-walled hollow support shaft is smaller than the outer diameter of the inner gear ring body.

[0010] The inner gear ring body is installed on the gearbox housing.

[0011] The thin-walled hollow support shaft is in contact with the gearbox housing.

[0012] The planetary gear train body comprises an input shaft, which is connected to a sun gear, and the sun gear and the inner gear ring body are meshed and driven by a plurality of planetary gears, which are mounted on a planet carrier, and the planet carrier is connected to an output shaft.

[0013] The input shaft and the sun gear are connected via a sun gear shaft.

[0014] The planetary gear is connected with the planetary carrier via the planetary gear shaft.

[0015] The planet carrier is also provided with a planetary wheel thrust washer which contacts and stops the planetary wheel shaft.

[0016] Compared with the prior art, the utility model has the following technical effects:

[0017] (I) The planetary gear train of the utility model can effectively improve the load-sharing performance of the planetary gear train without reducing the strength of the planetary gear train.

[0018] (II) In the planetary gear train of the present invention, the inner gear ring body is mounted on the gearbox housing, and the thin-walled hollow support shaft is in a free state. The thin-walled hollow support shaft in a free state can provide deformation compensation for the planetary gear train, making up for the defect of insufficient flexibility of the inner gear ring body, thereby making the planetary gear train have a better load-balanced state, smaller vibration and noise, and higher transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the inner gear ring with a thin-walled hollow support shaft structure.

[0020] Figure 2 It is a schematic diagram of the assembly of the inner gear ring with a thin-walled hollow support shaft structure and the gearbox housing.

[0021] Figure 3 This is a schematic diagram of the structure of the planetary gear train.

[0022] The meanings of the various numbers in the figure are: 1-planetary gear train body, 2-inner gear ring with thin-walled hollow support shaft structure, 3-gearbox housing.

[0023] 101 - input shaft, 102 - sun gear, 103 - planetary gear, 104 - planet carrier, 105 - output shaft, 106 - sun gear shaft, 107 - planetary gear shaft, 108 - planetary gear thrust washer.

[0024] 201-inner gear ring body, 202-thin-wall hollow support shaft.

[0025] The specific contents of the utility model are further explained in detail below in conjunction with the embodiments. DETAILED DESCRIPTION

[0026] It should be noted that, unless otherwise specified, all devices and components in the present invention are devices and components known in the prior art.

[0027] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of the present application fall within the protection scope of the present invention.

[0028] Example:

[0029] This embodiment provides a planetary gear train including a thin-walled hollow support shaft structure, including a planetary gear train body 1, wherein the planetary gear train body 1 includes an inner gear ring 2 having a thin-walled hollow support shaft structure, such as Figure 1 As shown, the inner gear ring 2 with a thin-walled hollow support shaft structure comprises an inner gear ring body 201 , and a thin-walled hollow support shaft 202 is coaxially arranged on one side of the inner gear ring body 201 .

[0030] As a preferred solution of this embodiment, Figure 1 As shown, the inner gear ring body 201 and the thin-walled hollow support shaft 202 are integrally formed.

[0031] As a preferred solution of this embodiment, Figure 1 As shown, the inner diameter of the thin-walled hollow support shaft 202 is larger than the inner diameter of the inner gear ring body 201 , and the outer diameter of the thin-walled hollow support shaft 202 is smaller than the outer diameter of the inner gear ring body 201 .

[0032] As a preferred solution of this embodiment, Figure 2 As shown, the inner gear ring body 201 is mounted on the gearbox housing 3. The thin-walled hollow support shaft 202 is in contact with the gearbox housing 3.

[0033] As a specific solution of this embodiment, the planetary gear train body 1 adopts the planetary gear train of the known mining truck gearbox. Figure 3 As shown, the planetary gear train body 1 includes an input shaft 101, which is connected to a sun gear 102. The sun gear 102 and the inner gear ring body 201 are meshed and transmitted through a plurality of planetary gears 103. The plurality of planetary gears 103 are mounted on a planet carrier 104, and the planet carrier 104 is connected to an output shaft 105. The input shaft 101 and the sun gear 102 are connected through a sun gear shaft 106. The planetary gears 103 are connected to the planet carrier 104 through a planetary gear shaft 107. A planetary gear thrust washer 108 is also mounted on the planet carrier 104, which contacts and thrusts the planetary gear shaft 107.

[0034] In this embodiment, the power is input to the planetary gear train through the input shaft 101 via the sun gear 102, transmitted through the planetary gear train, and output from the output shaft 105 via the planet carrier 104. The thin-walled hollow support shaft 202 can make up for the defect of insufficient flexibility of the inner gear ring body 201, so that the load-sharing characteristics of the planetary gear train are better. Compared with the traditional gear ring, the thin-walled hollow support shaft 202 is thinner, more flexible, and has a stronger error compensation capability.

Claims

1. A planetary gear train including a thin-walled hollow support shaft structure, comprising a planetary gear train body (1), characterized in that: The planetary gear train body (1) comprises an inner gear ring (2) having a thin-walled hollow support shaft structure, wherein the inner gear ring (2) having a thin-walled hollow support shaft structure comprises an inner gear ring body (201), and a thin-walled hollow support shaft (202) is coaxially arranged on one side of the inner gear ring body (201).

2. The planetary gear train comprising a thin-walled hollow support shaft structure as claimed in claim 1, characterized in that: The inner gear ring body (201) and the thin-walled hollow support shaft (202) are integrally formed.

3. The planetary gear train comprising a thin-walled hollow support shaft structure as claimed in claim 1, characterized in that: The inner diameter of the thin-walled hollow support shaft (202) is larger than the inner diameter of the inner gear ring body (201), and the outer diameter of the thin-walled hollow support shaft (202) is smaller than the outer diameter of the inner gear ring body (201).

4. The planetary gear train comprising a thin-walled hollow support shaft structure as claimed in claim 1, characterized in that: The inner gear ring body (201) is mounted on the gearbox housing (3).

5. The planetary gear train comprising a thin-walled hollow support shaft structure as claimed in claim 3, characterized in that: The thin-walled hollow support shaft (202) is in contact with the gearbox housing (3).

6. The planetary gear train comprising a thin-walled hollow support shaft structure as claimed in claim 1, characterized in that: The planetary gear train body (1) comprises an input shaft (101), the input shaft (101) is connected to a sun gear (102), the sun gear (102) and the inner gear ring body (201) are meshed and driven via a plurality of planetary gears (103), the plurality of planetary gears (103) are mounted on a planet carrier (104), and the planet carrier (104) is connected to an output shaft (105).

7. The planetary gear train comprising a thin-walled hollow support shaft structure as claimed in claim 6, characterized in that: The input shaft (101) and the sun gear (102) are connected via a sun gear shaft (106).

8. The planetary gear train comprising a thin-walled hollow support shaft structure as claimed in claim 6, characterized in that: The planetary gear (103) is connected to the planetary carrier (104) via a planetary gear shaft (107).

9. The planetary gear train comprising a thin-walled hollow support shaft structure as claimed in claim 6, characterized in that: The planet carrier (104) is also provided with a planetary wheel thrust washer (108) which contacts and stops the planetary wheel shaft (107).

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