Planet wheel transmission

Abstract

The utility model discloses a planet gear transmission which specifically comprises a first planet gear ring, a first sun gear, a first planet gear and a first planet carrier, a first input shaft is arranged on the first sun gear and arranged in a first input end shell, and a first output shaft is arranged on the first planet carrier and arranged in a first output end shell. The first input end shell and the first output end shell are detachably connected and form an assembly cavity with a limiting space, the first planetary gear ring is arranged in the limiting space, the axis of the first planetary gear ring can deflect, and a limiting pin for preventing the first planetary gear ring from rotating in the limiting space along the axis of the first planetary gear ring is arranged in the limiting space. According to the scheme, by means of the arrangement, under the interaction force generated when all parts of the planet gear speed changer are meshed with one another, the first planet gear automatically adjusts the position in the space, then the fit clearance between teeth of all the parts is matched, and therefore when the planet gear speed reducer operates, stress of all the parts is relatively uniform, abrasion synchronism is guaranteed, and the service life of the planet gear speed changer is prolonged. And the service life of the product is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of transmission, particularly relates to a planetary gear transmission. BACKGROUND

[0002] The planetary gear transmission belongs to a kind of gear box, it is by planetary gear ring, sun gear, planetary gear and gear wheel shaft composition, according to the movement relationship of gear ring, sun gear and planetary gear, it can realize input shaft and output shaft to be separated from rigid transmission relationship, input shaft and output shaft same direction or reverse transmission and input and output shaft transmission ratio change, and it is widely used in land use, navigation, aviation and other means of transport.

[0003] REFERENCE Figures 1-3 The traditional planetary gear transmission usually includes planetary gear ring two, sun gear two, planetary gear two, planetary carrier two for connecting planetary gear, sun gear two is fixed at the one end of input shaft two, planetary carrier two is fixed at the one end of output shaft two, input shaft two is arranged in a input end shell two, output shaft two is arranged in a output end shell two, when assembling, make sun gear two, planetary gear two, planetary gear ring two after intermeshing by long bolt, input end shell two, planetary gear ring two and output end shell two are fixed together, that is, the assembly of planetary gear transmission is completed.

[0004] In the above-mentioned traditional planetary gear transmission, planetary gear ring, input end shell and output end shell two are fixed together, in actual production and processing, affected by precision, it can not make each component axis completely locate on a straight line, in this case, it is easy to make the wear of each part of planetary gear ring two inconsistent when sun gear two, planetary gear two, planetary gear ring two move mutually, therefore, a scheme is needed to improve the above-mentioned problem. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of planetary gear transmission to solve the problems raised in the above background.

[0006] To achieve the above object, one technical scheme of the utility model is as follows: a kind of planetary gear transmission, including planetary gear ring one, sun gear one, planetary gear one and planetary carrier one for connecting planetary gear, the input shaft one is arranged on the sun gear one, the output shaft one is arranged on the planetary carrier one, the input shaft one is placed in a input end shell one, the output shaft one is placed in a output end shell one, the input end shell one and output end shell one are detachably connected and form an assembly cavity, there is a limiting space in the assembly cavity, the planetary gear ring one is placed in the limiting space and its axis can be deflected, the limiting space is provided with the limiting pin that prevents the free rotation of planetary gear ring one in it.

[0007] Preferably, an elastic clamping component is provided between the planetary gear ring and the limiting space, the elastic clamping component being used to prevent the planetary gear ring from colliding with the inner wall of the limiting space.

[0008] Preferably, the planetary gear ring is provided with a plurality of locking blocks, and the limiting space is provided with an opening for the locking blocks to enter. The locking blocks enter through the opening and are screwed into the limiting space, and the elastic clamping component is provided on the locking blocks.

[0009] Preferably, a limiting plate is detachably connected to the input end housing or the output end housing. The end face of the input end housing or the output end housing is stepped. The limiting plate is connected to the stepped end face of the input end housing or the output end housing to form a limiting space. The opening is formed on the limiting plate.

[0010] Preferably, a sealing ring is provided between the limiting plate and the input end housing or the output end housing.

[0011] Preferably, the elastic clamping assembly includes an elastic element disposed on a planetary gear ring and a ball connected to one end of the elastic element, the ball abutting against the inner wall of the limiting space.

[0012] Preferably, the card block has a chamfer to facilitate entry into the limiting space.

[0013] Preferably, the card block has a screw-out connecting part, and after the card block is screwed into the limiting space, the screw-out connecting part is placed at the opening.

[0014] The beneficial effects of this utility model are as follows: By setting a limiting space, this solution allows the planetary gear one to adjust its position in space under the interaction force generated when the planetary gear one, planetary gear one, and sun gear one mesh. Combined with the fit clearance between the teeth of each part, the force on each part is relatively uniform when the planetary gear one, planetary gear one, and sun gear one are running, ensuring the synchronicity of wear and effectively improving the service life of the product.

[0015] Among them, by setting up an elastic clamping component, the noise generated by the planetary gear shaking in the limited space and the heat generated by the shaking friction can be effectively reduced;

[0016] The method of entering the limiting space through the locking block can effectively reduce the opening conditions (height, etc.) of the limiting space and facilitate the connection between the planetary gear ring and the limiting space.

[0017] Among them, by setting a limiting plate that can be detached from the input end housing or the output end housing, it is easier to assemble the planetary gear ring into the limiting space.

[0018] The planetary gear ring can be easily removed by using a suitable tool, thanks to the included screw-out connector. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a traditional planetary gear transmission;

[0020] Figure 2 This is a schematic diagram of the internal structure of a traditional planetary gear transmission;

[0021] Figure 3 This is an exploded view of a traditional planetary gear transmission;

[0022] Figure 4 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of this utility model;

[0024] Figure 6 This is an exploded view of this utility model;

[0025] Figure 7 This is a schematic diagram of the limiting space in this utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the planetary gear ring and the elastic clamping assembly in this utility model;

[0027] In the diagram: 1. Planetary gear ring one; 2. Sun gear one; 3. Planetary gear one; 4. Planet carrier one; 5. Input shaft one; 6. Input end housing one; 7. Output shaft one; 8. Output end housing one; 9. Limiting space; 10. Limiting through hole; 11. Limiting plate; 12. Opening; 13. Locking block; 14. Unscrewed connection part; 15. Sealing groove; 16. Storage hole; 17. Elastic element; 18. Ball bearing; 19. Planetary gear ring two; 20. Sun gear two; 21. Planetary gear two; 22. Planet carrier two; 23. Input shaft two; 24. Input end housing two; 25. Output shaft two; 26. Output end housing two. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention. Example

[0029] See Figures 1-3A traditional planetary gear transmission typically includes a planetary ring gear 19, a sun gear 20, planetary gears 21, and a planet carrier 22 connecting the planetary gears. The sun gear 20 is fixed to one end of the input shaft 23, and the planet carrier 22 is fixed to one end of the output shaft 25. The input shaft 23 is housed in an input end housing 24, and the output shaft 25 is housed in an output end housing 26. During assembly, the sun gear 20, planetary gears 21, and planetary ring gear 19 are meshed together, and then the input end housing 24, planetary ring gear 19, and output end housing 26 are fixed together with long bolts to complete the assembly of the planetary gear transmission.

[0030] Based on the inherent limitations of traditional planetary gear transmissions during assembly and use, where precision constraints during actual production processes prevent the axes of various components from being perfectly aligned, leading to uneven wear across different parts of the planetary gear ring 19 when the planetary ring gear 29, sun gear 20, and planetary gear 21 move relative to each other, this application proposes a novel design solution, specifically:

[0031] See Figures 4-8 A planetary gear transmission includes a planetary ring gear 1, a sun gear 2, planetary gears 3, and a planet carrier 4 for connecting the planetary gears. An input shaft 5 is mounted on the sun gear 2, and an output shaft 7 is mounted on the planet carrier 4. The input shaft 5 is housed within an input end housing 6. Specifically, a bearing can be installed within the input end housing 6, with the outer ring of the bearing fixed to the input end housing 6 and the inner ring of the bearing fixed to the input shaft to limit its movement. The output shaft 7 is housed within an output end housing 8. The assembly structure of the output shaft 7 and the output end housing 8 is similar to the assembly structure of the input shaft 5 and the input end housing 6. The input end housing 6 and the output end housing 8 are detachably connected and form a [missing information - likely a typo]. An assembly cavity is provided, which can be connected by a long bolt. A limiting space 9 exists within the assembly cavity. The planetary gear ring 1 is placed within the limiting space 9 and its axis can be deflected. A limiting pin is provided within the limiting space 9 to prevent the planetary gear ring 1 from rotating along its axis. In this embodiment, a limiting through hole 10 is provided on the planetary gear ring 1. The long bolt connecting the input end housing 6 and the output end housing 8 passes through the limiting through hole 10 (i.e., the limiting pin is integrated with the long bolt). At the same time, it is necessary to ensure that the long bolt can prevent the planetary gear ring 1 from rotating along its axis without affecting its movement in other directions. For example, the limiting through hole 10 can achieve the above function by adopting an oblong hole design.

[0032] Among them, see Figure 5 , Figure 6 , Figure 7 , Figure 8The planetary gear ring 1 is provided with a plurality of locking blocks 13. The limiting space 9 has an opening 12 for the locking blocks 13 to enter. The locking blocks 13 enter through the opening 12 and are screwed into the limiting space 9. The locking blocks 13 have chamfers to facilitate entry into the limiting space 9. The limiting space 9 is specifically formed as follows: a limiting disk 11 is detachably connected to the input end housing 6 or the output end housing 8. The end face of the input end housing 6 or the output end housing 8 is stepped. The limiting disk 11 is connected to the stepped end face of the input end housing 6 or the output end housing 8 to form the limiting space 9. The opening 12 is opened on the limiting disk 11.

[0033] The locking block 13 is provided with a screw-out connecting part 14. After the locking block 13 is screwed into the limiting space 9, the screw-out connecting part 14 is placed at the opening 12. In this embodiment, the screw-out connecting part 14 is a circular hole on the connecting block with the axis parallel to the axis of the planetary gear ring 1. By inserting a pin or the like into the circular hole, the planetary gear ring 1 can be easily taken out by rotating the pin or the like.

[0034] In this embodiment, the limiting plate 11 and the input end housing 6 are detachably connected by bolts; wherein, a sealing groove 15 is provided on the end face of the input end housing 6 connected to the limiting plate 11, and a sealing ring is provided in the sealing groove 15.

[0035] In addition, an elastic clamping component is provided between the planetary gear ring 1 and the limiting space 9. The elastic clamping component is used to prevent the planetary gear ring 1 from colliding with the inner wall of the limiting space 9. Specifically, the elastic clamping component includes an elastic element 17 and a ball bearing 18 connected to one end of the elastic element 17. The elastic element 17 can be a spring. A storage hole 16 is provided on the locking block 13. The elastic element 17 is placed in the storage hole 16. The ball bearing 18 is placed at the opening of the storage hole 16 and partially extends out of the storage hole 16 in its natural state, so that the ball bearing 18 can abut against the inner wall of the limiting space 9.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A planetary gear transmission, comprising a planetary ring gear (1), a sun gear (2), planetary gears (3), and a planet carrier (4) for connecting the planetary gears, wherein an input shaft (5) is disposed on the sun gear (2), the planetary ring gear, the sun gear, and the planetary gears mesh with each other, and an output shaft (7) is disposed on the planet carrier (4), wherein the input shaft (5) is disposed within an input end housing (6), and the output shaft (7) is disposed within an output end housing (8), characterized in that: The input end housing 1 (6) and the output end housing 1 (8) are detachably connected to form an assembly cavity. There is a limiting space (9) in the assembly cavity. The planetary gear ring 1 (1) is placed in the limiting space (9) and its axis can be deflected. A limiting pin is provided in the limiting space (9) to prevent the planetary gear ring 1 (1) from rotating along its axis inside it.

2. A planetary gear transmission according to claim 1, characterized in that: An elastic clamping component is provided between the planetary gear ring (1) and the limiting space (9), and the elastic clamping component is used to prevent the planetary gear ring (1) from colliding with the inner wall of the limiting space (9).

3. A planetary gear transmission according to claim 2, characterized in that: The elastic clamping assembly includes an elastic element (17) disposed on a planetary gear ring (1) and a ball (18) connected to one end of the elastic element (17), the ball (18) abutting against the inner wall of the limiting space (9).

4. A planetary gear transmission according to claim 2 or 3, characterized in that: The planetary gear ring (1) is provided with a plurality of locking blocks (13), and the limiting space (9) is provided with an opening (12) for the locking blocks (13) to enter. The locking blocks (13) enter through the opening (12) and are screwed into the limiting space (9). The elastic abutment component is provided on the locking blocks (13).

5. A planetary gear transmission according to claim 4, characterized in that: A limiting plate (11) is detachably connected to the input end housing (6) or the output end housing (8). The end face of the input end housing (6) or the output end housing (8) is stepped. The limiting plate (11) is connected to the stepped end face of the input end housing (6) or the output end housing (8) to form a limiting space (9). The opening (12) is opened on the limiting plate (11).

6. A planetary gear transmission according to claim 5, characterized in that: A sealing ring is provided between the limiting plate (11) and the input end housing (6) or the output end housing (8).

7. A planetary gear transmission according to claim 4, characterized in that: The card block (13) has a chamfer to facilitate entry into the limiting space (9).

8. A planetary gear transmission according to claim 4, characterized in that: The card block (13) is provided with a screw-out connecting part (14). After the card block (13) is screwed into the limiting space (9), the screw-out connecting part (14) is placed at the opening (12).

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