Planetary axle architecture and differential assembly

Abstract

The application relates to a planetary shaft structure in the technical field of differentials, which comprises a left half shaft gear, a right half shaft gear arranged opposite to the left half shaft gear, and four planetary gears arranged in a cross shape between the left half shaft gear and the right half shaft gear and meshed with the two gears, wherein a main support is arranged through the coaxial two planetary gears of one opposite arrangement, an auxiliary support is arranged through the coaxial two planetary gears of the other opposite arrangement, the two auxiliary supports are respectively arranged on the two sides of the main support, and each auxiliary support is connected with the main support through a positioning piece; the whole planetary shaft structure is simple and clear, the setting of a planetary support is cancelled, the self-strength and mounting strength of the left half shaft gear, the right half shaft gear and the four planetary gears are improved, the design flexibility of the whole planetary shaft structure is improved, and the design complexity and cost of the differential assembly are reduced.

Description

Technical Field

[0001] This utility model relates to the field of differential technology, specifically to a planetary shaft structure and a differential assembly. Background Technology

[0002] The differential is an important component of a vehicle's power transmission system. Its function is to achieve differential action when the wheels on both sides of the drive shaft rotate at different speeds (such as when the vehicle is turning), thereby preventing wheel slippage, reducing driving resistance and tire wear. Existing ordinary differentials generally consist of a differential housing, left and right half-shaft gears, planetary gear shafts, and four planetary gears.

[0003] In the Chinese utility model patent with authorization announcement number CN218863206U, a four-planetary high-strength differential bridge is disclosed. In this patent, the position of the four planetary gears is defined by setting a planetary support and dividing the planetary gear shaft into a long shaft and two short shafts.

[0004] However, this fixing method requires the planetary carrier to have high load and high precision characteristics, which increases the design cost of the differential and the overall complexity of the differential. Moreover, the existence of the planetary carrier limits the installation size of the left and right half shaft gears and the four planetary gears, as well as the mating length between the two and the long and short shafts, which reduces the strength of the left and right half shaft gears and the four planetary gears and the installation strength, thus affecting the service life of the differential. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a planetary shaft structure and differential assembly to solve the problems of complex differential assembly design, high cost and reduced service life caused by the planetary support in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A planetary axis structure, comprising:

[0008] Left half-shaft gear;

[0009] The right half-shaft gear, which is arranged facing the left half-shaft gear; and

[0010] Four planetary gears are arranged in a cross shape between the left and right half-shaft gears and mesh with them. A main support is coaxially connected between two planetary gears arranged in opposite directions. Auxiliary support is coaxially connected to two planetary gears arranged in opposite directions. The two auxiliary support members are located on both sides of the main support member. Each auxiliary support member is connected to the main support member by a positioning member.

[0011] Compared with the prior art, this utility model has the following advantages: In use, the main support and two auxiliary support are assembled with four planetary gears, and the two auxiliary support are connected to the main support through two positioning parts. Then, the left half-shaft gear and the right half-shaft gear are respectively engaged with the four planetary gears. Finally, the left half-shaft gear, the right half-shaft gear, and the four planetary gears are installed into the differential housing and fixedly connected to the differential housing through the main support and two auxiliary support parts, thereby limiting the position of the four planetary gears. The entire planetary shaft structure is simple and clear, eliminating the planetary carrier, improving the self-strength and installation strength of the left half-shaft gear, the right half-shaft gear, and the four planetary gears, and also improving the design flexibility of the entire planetary shaft structure, making the entire planetary shaft structure more compact and reducing the design complexity and cost of the differential assembly.

[0012] Preferably, a positioning hole is provided in the middle of the support member along the arrangement direction of the two auxiliary support members, and the two positioning members are inserted into the two ends of the positioning hole in a one-to-one correspondence.

[0013] Preferably, each of the positioning components includes a positioning rod with one end fixedly connected to the corresponding auxiliary support component, and the other end of the positioning rod is inserted into the positioning hole.

[0014] Preferably, the main support member includes a long shaft coaxially disposed between two corresponding planetary gears, the two auxiliary support members are respectively located on both sides of the long shaft, and the positioning hole is opened in the middle of the long shaft.

[0015] Preferably, each of the auxiliary support members includes a short shaft that coaxially passes through the corresponding planetary gear at one end, and the end of the short shaft facing the long shaft is coaxially and fixedly connected to the corresponding positioning rod.

[0016] Preferably, the diameter of each positioning rod is smaller than the diameter of the corresponding short shaft, the total length of the two positioning rods is smaller than the length of the positioning hole, and the end of each of the two short shafts away from the long shaft is provided with a pin hole perpendicular to its axial direction.

[0017] Preferably, the diameter of each positioning rod is equal to the diameter of the corresponding short axis, the two positioning rods are coaxially fixedly connected, the two positioning rods and each positioning rod and the corresponding short axis are integrally formed, and a pin hole (6) is opened perpendicular to its axial direction on the end of the short axis away from the long axis and the end of the long axis.

[0018] Preferably, two first lubrication surfaces are provided on the sidewall of the long shaft facing each other along its axial direction, and two second lubrication surfaces are provided on the sidewall of the two short shafts facing the long shaft facing each other along its axial direction.

[0019] This utility model also provides a differential assembly, including the aforementioned planetary shaft structure.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is a front view of one embodiment of the present invention.

[0022] Figure 2 for Figure 1 A cross-sectional view along the AA direction.

[0023] Figure 3 for Figure 2 A cross-sectional view of another embodiment.

[0024] Figure 4 for Figure 1 A schematic diagram of the structure after removing the left and right half-shaft gears.

[0025] The numbers in the diagram are as follows: 1. Left half-shaft gear; 2. Right half-shaft gear; 3. Planetary gear; 4. Long shaft; 41. Locating hole; 42. First lubrication surface; 5. Short shaft; 51. Locating rod; 52. Second lubrication surface; 6. Pin hole. Detailed Implementation

[0026] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0027] like Figure 1 as well as Figure 4 As shown, an embodiment of this utility model provides a planetary shaft structure, including: a left half-shaft gear 1; a right half-shaft gear 2, which is arranged facing the left half-shaft gear 1; and four planetary gears 3, which are arranged in a cross shape between the left half-shaft gear 1 and the right half-shaft gear 2 and mesh with them. A main support member is coaxially provided between the two planetary gears 3 arranged facing each other, and an auxiliary support member is coaxially provided on each of the other two planetary gears 3 arranged facing each other. The two auxiliary support members are located on both sides of the main support member, and each auxiliary support member is connected to the main support member by a positioning member.

[0028] By eliminating the planetary support, the strength and installation strength of the left half-shaft gear 1, right half-shaft gear 2, and four planetary gears 3 are improved. This also increases the design flexibility of the entire planetary shaft structure, making the entire planetary shaft structure more compact and reducing the design complexity and cost of the differential.

[0029] like Figure 2-4As shown, according to another embodiment of the present invention, the planetary shaft structure further optimizes the positioning member, main support member, and auxiliary support member included therein. The middle part of the support member is provided with a positioning hole 41 along the arrangement direction of the two auxiliary support members. The two positioning members are inserted into the two ends of the positioning hole 41 in a one-to-one correspondence. Each positioning member includes a positioning rod 51 with one end fixedly connected to the corresponding auxiliary support member. The other end of the positioning rod 51 is inserted into the end corresponding to the positioning hole 41. The total length of the two positioning rods 51 is less than or equal to the length of the positioning hole 41.

[0030] The main support includes a long shaft 4 coaxially disposed between two corresponding planetary gears 3, and two auxiliary support components are located on both sides of the long shaft 4. The positioning hole 41 is opened in the middle of the long shaft 4.

[0031] Each of the auxiliary support members includes a short shaft 5 that coaxially passes through the corresponding planetary gear 3 at one end, and the end of the short shaft 5 facing the long shaft 4 is coaxially and fixedly connected to the corresponding positioning rod 51.

[0032] In the above-mentioned planetary shaft structure, the four planetary gears 3 are assembled by relying solely on the cooperation between the two short shafts 5 and the long shaft 4 through the positioning rod 51, which avoids the setting of planetary support, simplifies the planetary shaft structure, and makes the entire planetary shaft structure more compact.

[0033] like Figure 2 As shown, according to another embodiment of the present invention, in a planetary shaft structure, preferably, the diameter of each positioning rod 51 is smaller than the diameter of the corresponding short shaft 5, the total length of the two positioning rods 51 is smaller than the length of the positioning hole 41, and the ends of the two short shafts 5 away from the long shaft 4 are provided with pin holes 6 perpendicular to their axial direction; when the diameter of the positioning rod 51 is smaller than the diameter of the short shaft 5, there is no need to provide pin holes 6 on the long shaft 4, only need to install pins in the pin holes 6 of the two short shafts 5 to connect the two short shafts 5 to the differential housing, so that the position of the long shaft 4 can be defined at the same time.

[0034] like Figure 3 As shown, according to another embodiment of the present invention, in a planetary shaft structure, preferably, the diameter of each positioning rod 51 is equal to the diameter of the corresponding short shaft 5, the two positioning rods 51 are coaxially fixedly connected, and the two positioning rods 51 and each positioning rod 51 and the corresponding short shaft 5 are integrally formed. A pin hole 6 is perpendicular to the axial direction of both the end of one short shaft 5 away from the long shaft 4 and the end of the long shaft 4. When the diameter of the positioning rod 51 is equal to the diameter of the short shaft 5, and the two positioning rods 51 and each positioning rod 51 and the corresponding short shaft 5 are integrally formed, it is only necessary to open a pin hole 6 at the end of one short shaft 5 away from the long shaft 4 and at one end of the long shaft 4, and install a pin in the pin hole 6 to define the positions of the two short shafts 5 and the long shaft 4.

[0035] like Figure 4 As shown, according to another embodiment of the present invention, in a planetary shaft structure, preferably, two first lubrication surfaces 42 are provided on the side wall of the long shaft 4 facing each other along its axial direction, and two second lubrication surfaces 52 are provided on the side wall of the two short shafts 5 facing the long shaft 4 along their axial direction; preferably, the length of the two first lubrication surfaces 42 is greater than the distance between the corresponding two planetary gears 3, but less than the length of the long shaft 4, while the length of the two second lubrication surfaces 52 is greater than the distance between the corresponding planetary gear 3 and the long shaft 4, and the distance between the two first lubrication surfaces 42 is less than the diameter of the long shaft 4, and the distance between the two second lubrication surfaces 52 is less than the diameter of the short shaft 5; the purpose of setting the first lubrication surfaces 42 and the second lubrication surfaces 52 is to provide a stable lubricating oil storage and guiding space between the planetary gear 3 and the long shaft 4 or the short shaft 5, so as to ensure that the planetary gear 3 has a good lubrication effect.

[0036] This utility model also provides a differential assembly, including the aforementioned planetary shaft structure. Through the planetary shaft structure, the design complexity and design cost of the differential assembly can be reduced, and the service life of the differential assembly can be improved. Furthermore, other structures included in the differential assembly are disclosed in Chinese utility model patent with authorization announcement number CN218863206U, and will not be described in detail here.

[0037] The working principle of this utility model is as follows: When using this utility model, the long shaft 4 and the two short shafts 5 are respectively assembled with the corresponding planetary gears 3, and each positioning rod 51 is inserted into the positioning hole 41. Then, the left half shaft gear 1 and the right half shaft gear 2 are meshed with the four planetary gears 3 to complete the assembly of the entire planetary shaft structure. Then, the entire planetary shaft structure is installed into the differential housing, and a pin is installed in each pin hole 6 to connect with the differential housing, thereby limiting the position of the two short shafts 5 and the long shaft 4, and simultaneously limiting the position of the four planetary gears 3.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A planetary axis structure, characterized in that, include: Left half-shaft gear (1); The right half-shaft gear (2) is arranged opposite to the left half-shaft gear (1); as well as Four planetary gears (3) are arranged in a cross shape between the left half-shaft gear (1) and the right half-shaft gear (2) and mesh with them. A main support is coaxially connected between two planetary gears (3) arranged in opposite directions, and an auxiliary support is coaxially connected between two planetary gears (3) arranged in opposite directions. The two auxiliary support members are located on both sides of the main support member, and each auxiliary support member is connected to the main support member by a positioning member. The support member has a positioning hole (41) in the middle along the arrangement direction of the two auxiliary support members, and the two positioning members are inserted into the two ends of the positioning hole (41) in a one-to-one correspondence. Each of the positioning components includes a positioning rod (51) with one end fixedly connected to the corresponding auxiliary support component, and the other end of the positioning rod (51) is inserted into the positioning hole (41).

2. The planetary axis structure according to claim 1, characterized in that, The main support includes a long shaft (4) coaxially disposed between two corresponding planetary gears (3), the two auxiliary support members are located on both sides of the long shaft (4), and the positioning hole (41) is opened in the middle of the long shaft (4).

3. The planetary axis structure according to claim 2, characterized in that, Each of the auxiliary support members includes a short shaft (5) that coaxially passes through the corresponding planetary gear (3) at one end, and the end of the short shaft (5) facing the long shaft (4) is coaxially and fixedly connected to the corresponding positioning rod (51).

4. A planetary axis structure according to claim 3, characterized in that, The diameter of each positioning rod (51) is smaller than the diameter of the corresponding short shaft (5), the total length of the two positioning rods (51) is smaller than the length of the positioning hole (41), and the end of each of the two short shafts (5) away from the long shaft (4) is provided with a pin hole (6) perpendicular to its axial direction.

5. A planetary axis structure according to claim 3, characterized in that, The diameter of each positioning rod (51) is equal to the diameter of the corresponding short shaft (5). The two positioning rods (51) are coaxially fixedly connected. The two positioning rods (51) and each positioning rod (51) and the corresponding short shaft (5) are integrally formed. A pin hole (6) is opened perpendicular to its axial direction on the end of one short shaft (5) away from the long shaft (4) and the end of the long shaft (4).

6. A planetary axis structure according to claim 3, characterized in that, Two first lubrication surfaces (42) are provided on the side wall of the long shaft (4) facing each other along its axial direction, and two second lubrication surfaces (52) are provided on the side wall of the two short shafts (5) facing the long shaft (4) along their axial direction.

7. A differential assembly, characterized in that, Including the planetary axis structure as described in any one of claims 1-6.

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