Straight tooth cylindrical planet wheel differential mechanism

Abstract

The utility model relates to the technical field of straight tooth cylindrical planet wheel differential mechanisms, in particular to a straight tooth cylindrical planet wheel differential mechanism which comprises a first outer shell and a second outer shell which are of an arc-shaped structure, gear rings are installed in the first outer shell and the second outer shell in a clamped mode, and planetary gear sets are connected to the gear rings. An upper mounting end cover and a lower mounting end cover are fixedly mounted at the upper end and the lower end of the first outer shell correspondingly, an upper shaft body and a lower shaft body are mounted in the upper mounting end cover and the lower mounting end cover correspondingly, and a first connecting plate and a second connecting plate are arranged at the two ends of the outer side of the first outer shell and the two ends of the outer side of the second outer shell correspondingly. The first outer shell and the second outer shell can be separated by detaching the bolts connecting the first connecting plate and the second connecting plate on the two sides, at the moment, the internal planetary gear set is exposed, gears in the planetary gear set can be detected, cleaned and replaced, and detection, cleaning and replacement are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of spur cylindrical planetary gear differentials, and specifically relates to a spur cylindrical planetary gear differential. Background Technique

[0002] The spur cylindrical planetary gear differential is a differential with a special design, and its key characteristic is that all spur gears are used for transmission. This design makes the structure of the differential relatively simple, and the disassembly, assembly and positioning are convenient and fast.

[0003] In the spur cylindrical planetary gear differential, power is output from the engine, passed through the gearbox, drive shaft and main reducer, and then transmitted to the differential housing. Then, the differential distributes the torque to the left and right half shafts and transmits it to the wheels, thereby driving the vehicle forward. The differential is composed of two half shaft gears and four planetary gear shafts meshing with each other. Among them, the left half shaft gear meshes with planetary gear shafts a and c respectively, the right half shaft gear meshes with planetary gear shafts b and d respectively, planetary gear shafts a and b mesh, and planetary gear shafts c and d mesh.

[0004] When the differential is working, the planetary gear rotates around the sun gear on one hand and rolls along the internal gear ring on the other hand. This differential action enables the planetary gear to rotate at different speeds to adapt to the speed difference that may occur during the driving of the vehicle.

[0005] After retrieval, a waterproof spur cylindrical planetary differential is mentioned in the application number CN200720111738.0. This vehicle differential mainly changes the common conical planetary gear into a spur cylindrical planetary gear, thereby solving the disadvantages of large axial force of the conical planetary gear and easy wear of the gear, and also enabling the spur cylindrical gears of the same specification to be mass-produced, simplifying the production process.

[0006] However, the existing outer shells of spur cylindrical planetary gear differentials are all integrally cast. Therefore, when the planetary gear set is installed inside the outer shell, it is relatively inconvenient to replace or clean the gears in the planetary gear set subsequently. Content of the Utility Model

[0007] The purpose of the utility model is to provide a spur cylindrical planetary gear differential to solve the problems raised in the above background technique.

[0008] To achieve the above purpose, the utility model provides the following technical solutions:

[0009] A spur cylindrical planetary differential, comprising a first housing and a second housing with an arc-shaped structure. A toothed ring is snap-fitted inside the first housing and the second housing. A planetary gear set is connected to the toothed ring. The planetary gear set includes a main gear and a plurality of sub-gears. An upper mounting end cover and a lower mounting end cover are respectively fixedly installed at the upper and lower ends of the first housing. An upper shaft body and a lower shaft body are respectively installed inside the upper mounting end cover and the lower mounting end cover. First connecting plates and second connecting plates are provided at both outer ends of the first housing and the second housing.

[0010] As a preferred solution of the present utility model, the first connecting plates and the second connecting plates are of a square structure, and the first housing and the second housing are fixedly connected by bolts passing through the holes in the first connecting plates and the second connecting plates.

[0011] As a preferred solution of the present utility model, an interference fit is adopted between the cavity formed by the toothed ring, the first housing and the second housing, and the gears distributed on the periphery in the planetary gear set are meshed and connected with the toothed ring.

[0012] As a preferred solution of the present utility model, the upper mounting end cover and the lower mounting end cover are also fixedly connected to the upper and lower ends of the first housing and the second housing by bolts at the end faces.

[0013] As a preferred solution of the present utility model, a limiting bushing is integrally and fixedly connected to the middle positions of the upper mounting end cover and the lower mounting end cover, and the upper shaft body and the lower shaft body are key-connected to the inside of the limiting bushing.

[0014] As a preferred solution of the present utility model, both the first housing and the second housing are made of industrial-grade corrosion-resistant stainless steel.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] In the present utility model, by providing a spur cylindrical planetary differential, when maintaining the spur cylindrical planetary differential, the bolts connecting the first connecting plates and the second connecting plates on both sides can be disassembled, and then the first housing and the second housing can be separated. At this time, the internal planetary gear set is exposed, and the gears in the planetary gear set can be detected, cleaned and replaced, which is relatively convenient. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structure schematic diagram of the whole of the present utility model;

[0018] Figure 2 It is a three-dimensional structure schematic diagram of the partial disassembly of the present utility model;

[0019] Figure 3 Schematic diagram of the main view inside the present utility model;

[0020] Figure 4 3D structure diagram of another perspective of the present utility model.

[0021] In the figure: 1. First outer housing; 2. Second outer housing; 3. Tooth ring; 4. Planetary gear set; 5. Upper mounting end cover; 6. Lower mounting end cover; 7. Upper shaft body; 8. Lower shaft body; 9. First connecting plate; 10. Second connecting plate; 11. Limiting shaft sleeve. Specific embodiments

[0022] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0023] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] Embodiment, please refer to Figures 1-4 , the present utility model provides a technical solution:

[0027] A spur cylindrical planetary differential includes a first outer housing 1 with an arc-shaped structure and a second outer housing 2. A toothed ring 3 is snap-fitted inside the first outer housing 1 and the second outer housing 2. A planetary gear set 4 is connected to the toothed ring 3. The planetary gear set 4 includes a main gear and multiple sub-gears. An upper mounting end cover 5 and a lower mounting end cover 6 are respectively fixedly installed at the upper and lower ends of the first outer housing 1. An upper shaft body 7 and a lower shaft body 8 are respectively installed inside the upper mounting end cover 5 and the lower mounting end cover 6. First connecting plates 9 and second connecting plates 10 are provided at the outer ends of the first outer housing 1 and the second outer housing 2.

[0028] Specifically, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 . The first connecting plates 9 and the second connecting plates 10 are of square structures. The first outer housing 1 and the second outer housing 2 are fixedly connected by bolts passing through the hole positions on the first connecting plates 9 and the second connecting plates 10. Sealing gaskets are provided between the first connecting plates 9 and the second connecting plates 10, and between the first outer housing 1 and the second outer housing 2 to ensure tightness. An interference fit is adopted between the toothed ring 3 and the cavities formed by the first outer housing 1 and the second outer housing 2. The gears distributed on the periphery in the planetary gear set 4 are meshed and connected with the toothed ring 3. The upper mounting end cover 5 and the lower mounting end cover 6 and the upper and lower ends of the first outer housing 1 and the second outer housing 2 are also fixedly connected by bolts. A limiting bushing 11 is integrally and fixedly connected at the middle positions of the upper mounting end cover 5 and the lower mounting end cover 6. The upper shaft body 7 and the lower shaft body 8 are key-connected with the inside of the limiting bushing 11.

[0029] In this embodiment, first, the first outer housing 1 and the second outer housing 2 are aligned and installed so that the hole positions on the first connecting plates 9 and the second connecting plates 10 are aligned, and they are fixedly connected by bolts. Then, the toothed ring 3 is installed into the housing cavity by interference fit. Then, the corresponding planetary gear set 4 is assembled inside the toothed ring 3. Immediately afterwards, the upper mounting end cover 5 and the lower mounting end cover 6 equipped with the upper shaft body 7 and the lower shaft body 8 are placed at the axial two ends of the first outer housing 1 and the second outer housing 2, and the shaft body on one side inside the housing and the corresponding gears on the planetary gear set 4 are assembled. Finally, the upper mounting end cover 5 and the lower mounting end cover 6 and the two ends of the housing are fixedly installed by bolts. When disassembly is required, just do the reverse to complete, which is convenient for overhauling, cleaning and replacing the inside of the spur cylindrical planetary differential.

[0030] Among them, both the first outer housing 1 and the second outer housing 2 are made of industrial-grade corrosion-resistant stainless steel material; to avoid rusting of the housing and extend its service life.

[0031] The working process of the utility model: When using the spur cylindrical planetary gear differential, but when assembly is required, first align and install the first housing 1 and the second housing 2 so that the hole positions on the first connecting plate 9 and the second connecting plate 10 are aligned, and use bolts for fixed connection. Then install the tooth ring 3 into the housing cavity by interference fit. After that, assemble the corresponding planetary gear set 4 into the tooth ring 3. Immediately place the upper mounting end cover 5 and the lower mounting end cover 6 equipped with the upper shaft body 7 and the lower shaft body 8 at the axial two ends of the first housing 1 and the second housing 2, and assemble the corresponding gears on the shaft body on one side inside the housing and the planetary gear set 4. Finally, fix and install the upper mounting end cover 5 and the lower mounting end cover 6 to both ends of the housing with bolts. When disassembly is required, just do the opposite, which is convenient for overhauling, cleaning and replacing the inside of the spur cylindrical planetary gear differential.

[0032] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A spur gear planetary differential, comprising a first outer shell (1) and a second outer shell (2) of an arc-shaped structure, characterized in that: A gear ring (3) is mounted in the interior of the first outer shell (1) and the second outer shell (2), and a planetary gear set (4) is connected to the gear ring (3). The planetary gear set (4) comprises a main gear and a plurality of pinion gears. An upper mounting end cover (5) and a lower mounting end cover (6) are fixedly mounted at the upper and lower ends of the first outer shell (1), and an upper shaft body (7) and a lower shaft body (8) are mounted inside the upper mounting end cover (5) and the lower mounting end cover (6), respectively. A first connecting plate (9) and a second connecting plate (10) are arranged at the outer ends of the first outer shell (1) and the second outer shell (2).

2. A spur gear planetary differential according to claim 1, characterized in that: The first connecting plate (9) and the second connecting plate (10) are of square structure, and the first outer shell (1) and the second outer shell (2) are fixedly connected by bolts passing through holes on the first connecting plate (9) and the second connecting plate (10).

3. The spur gear planetary differential according to claim 1, characterized in that: An interference fit is adopted between the gear ring (3) and the cavity formed by the first outer shell (1) and the second outer shell (2), and the gears distributed on the periphery of the planetary gear set (4) are meshingly connected with the gear ring (3).

4. The spur gear planetary differential according to claim 1, characterized in that: The upper mounting end cover (5) and the lower mounting end cover (6) are fixedly connected to the end surfaces between the upper and lower ends of the first outer shell (1) and the second outer shell (2) by bolts.

5. The spur gear planetary differential according to claim 1, characterized in that: A limiting shaft sleeve (11) is integrally fixedly connected to the middle position of the upper mounting end cover (5) and the lower mounting end cover (6), and the upper shaft body (7) and the lower shaft body (8) are connected to the limiting shaft sleeve (11) via internal keys.

6. The spur gear planetary differential according to claim 1, characterized in that: The first outer shell (1) and the second outer shell (2) are both made of industrial-grade corrosion-resistant stainless steel.

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