CN213039772U

CN213039772U - Differential mechanism structure and vehicle applying same

Info

Publication number: CN213039772U
Application number: CN202021010280.1U
Authority: CN
Inventors: 钟伟红; 赵玉婷; 许正功; 林霄喆
Original assignee: Yiwu Geely Automatic Transmission Co ltd; Zhejiang Geely Holding Group Co Ltd
Current assignee: Yiwu Geely Automatic Transmission Co ltd; Zhejiang Geely Holding Group Co Ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-04-23
Anticipated expiration: 2030-06-04

Abstract

The application provides a differential mechanism structure and a vehicle using the same. The differential structure includes a differential housing and a gear set. The gear set is located inside the differential housing and is in clearance fit with the differential housing. The function of the differential is achieved by the cooperation of the differential housing and the gear set. The differential shell comprises a shell body, a cover plate and a gear ring, the shell body is connected with the cover plate through a key, and the key is connected with the safety and the reliability in the using process. Still be equipped with first limit structure between casing and the apron, can prevent that the apron from taking place axial displacement, ring gear and casing welded fastening provide bigger adjustable range for the position of ring gear. The application has the characteristics of high safety and reliability.

Description

Differential mechanism structure and vehicle applying same

Technical Field

The application relates to the field of vehicle transmissions, in particular to a differential mechanism structure and a vehicle using the same.

Background

Differentials are an essential component in automobiles and are typically integrated into the transmission of the vehicle. With the increasing design level of vehicles, the application requirements of differentials in practical application are higher and higher, and not only the realization of the original differential function needs to be ensured, but also the situation of connection fracture in the differential is reduced in the use process, so that the safety and the reliability of the differential are ensured.

In the existing differential structure design, a differential shell, a differential cover plate and a differential gear ring are connected and fixed by adopting a bolt connection structure. However, in the actual application process of the bolt connection mode, the bolt is easy to loosen and shear, so that the safety and reliability of the differential are reduced. Meanwhile, in the axial position of the differential gear ring, because the existing design is connected in a meshing mode, the axial adjustable range of the differential gear ring is reduced, and the arrangement of the differential gear in the transmission is limited. Meanwhile, the existing differential needs to use special tightening and pad selection measuring equipment, and has higher difficulty in assembly.

SUMMERY OF THE UTILITY MODEL

The application aims to solve the technical problem that the reliability and the safety of a differential connecting structure are low.

In order to solve the technical problem, the embodiment of the application discloses a differential mechanism structure, including differential mechanism shell and gear train, the gear train is located inside the differential mechanism shell, gear train and differential mechanism shell clearance fit, and the differential mechanism shell includes casing, apron and ring gear, and the casing passes through the key-type connection with the apron, still is equipped with first limit structure between casing and the apron, ring gear and casing welded fastening.

Further, the housing and the cover plate are connected through splines.

Further, first limit structure includes the snap ring, and the snap ring is used for preventing that the apron from taking place axial displacement.

Further, the gear set comprises a planet shaft, a planet wheel, a first half shaft and a second half shaft, the planet wheel is in clearance fit with the planet shaft, and the planet wheel can rotate around the planet shaft.

Furthermore, the planet shaft penetrates through the shell, and the planet shaft and the shell are in clearance fit.

Furthermore, a second limiting structure is arranged between the planet shaft and the shell.

Furthermore, the first half shaft is meshed with the planet wheel, the second half shaft is meshed with the planet wheel, the first half shaft is in clearance fit with the shell and the cover plate, and the second half shaft is in clearance fit with the shell and the cover plate.

Furthermore, the shell and the cover plate are provided with spiral oil grooves, and the spiral oil grooves are used for lubricating the first half shaft and the second half shaft.

Furthermore, a gasket is arranged between the cover plate and the first half shaft, and two surfaces of the gasket are respectively abutted against the cover plate and the first half shaft.

The application also discloses a vehicle including a differential structure.

By adopting the technical scheme, the application has the following beneficial effects:

a differential structure of the present application includes a differential housing and a gear set. The gear set is located inside the differential housing and is in clearance fit with the differential housing. The function of the differential is achieved by the cooperation of the differential housing and the gear set. The differential shell comprises a shell body, a cover plate and a gear ring, the shell body is connected with the cover plate through a key, and the key is connected with the safety and the reliability in the using process. Still be equipped with first limit structure between casing and the apron, can prevent that the apron from taking place axial displacement, ring gear and casing welded fastening provide bigger adjustable range for the position of ring gear.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a differential mechanism according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a partial structure of a ring gear according to an embodiment of the present disclosure;

FIG. 3 is a partial structural diagram of the cover plate of this embodiment 1;

the following is a supplementary description of the drawings:

1-a gear set; 2-a shell; 3-cover plate; 4-a gear ring; 5-a first limit structure; 6-a snap ring; 7-planet axis; 8-a planet wheel; 9-a first half shaft; 10-a second half-shaft; 11-a second limit structure; 12-a helical oil groove; 13-shim.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the present application. In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a differential structure according to an embodiment of the present disclosure, and the differential structure in fig. 1 includes a differential housing and a gear set 1. The differential transmits power from the housing to the gear set 1, and outputs the power to the wheels after differential motion by the structure of the gear set 1. The gear set 1 is located inside the differential housing, and the gear set 1 is in clearance fit with the differential housing. Differential mechanism shell includes casing 2, apron 3 and ring gear 4, and casing 2 passes through the key-type connection with apron 3, and the key-type connection makes being connected between casing 2 and the apron 3 have more reliability and security, has avoided the easy not hard up characteristic of bolted connection. A first limiting structure 5 is further arranged between the shell 2 and the cover plate 3, so that the cover plate 3 is limited to move in the axial direction.

In the embodiment of the present application, the ring gear 4 is fixed to the housing 2 by welding, and a larger displacement range can be determined upon mounting. Referring to fig. 2, fig. 2 is a partial structural schematic view of a ring gear 4 according to an embodiment of the present disclosure, a contact position of the ring gear 4 and a housing 2 is fixed by welding, a connection position is not limited to a contact surface of the housing 2, and an adjustment space in a certain range is provided. The gear ring 4 and the shell 2 are connected through a welding process, the reliability is good after welding, and due to the fact that the connection strength is improved, larger torque can be transmitted between the gear ring 4 and the shell 2, and the transmission performance is good.

In the embodiment of the present application, there are various implementable schemes for the factors such as the type and number of the key connections between the housing 2 and the cover plate 3, and the schemes can be determined according to the actual application scenario and the requirement of stability. According to factors such as the size of the transmission torque and the size and the shape of the fixing surface, different types of key connections can be selected in different differentials, and bolt connection which is easy to loose, cut and the like is replaced, so that the embodiment of the application has higher reliability and safety. Simultaneously in this application embodiment, the working method of key-type connection can be interference connection also can be clearance connection, and interference connection can make the connection between casing 2 and the apron 3 inseparabler, also can avoid the not hard up between key and the keyway simultaneously. The manner of the key connection can thus be varied in many ways, two alternative ways of key connection being described below.

In an alternative embodiment, in order to improve reliability and safety and reduce the occurrence of breakage of the key connection during use, an involute spline capable of transmitting a larger torque is selected for connection and is in interference fit with the key groove. The involute spline can be obtained by machining a gear by a gear machining method, and has the advantages of good manufacturability, high manufacturing precision, thicker tooth root and high strength of key teeth. Therefore, larger torque can be transmitted by selecting involute splines for key connection, and the reliability is higher.

In another optional implementation scheme, the rectangular spline is selected to connect the shell 2 and the cover plate 3 and is in interference fit with the key groove, the rectangular spline is high in centering precision and good in guiding performance, meanwhile, the reliability of the rectangular spline is high, and the shell 2 and the cover plate 3 can be connected more safely.

In the embodiment of the present application, the first limiting structure 5 includes a snap ring 6, and the snap ring 6 is used for preventing the cover plate 3 from moving axially. The selection of the first limiting structure 5 can be determined according to actual application requirements, for example, because the space between the housing 2 and the cover plate 3 which needs to be limited is annular, the snap ring 6 is selected to be used as a limiting part of the cover plate 3 and fixed between the cover plate 3 and the housing, so that the cover plate 3 can be effectively prevented from moving axially in the using process, and the reliability of the differential in use is improved. First limit structure 5 can also include that the annular space between apron 3 and shell is interior the interval and is set up structures such as fixture block, and snap ring 6 has simple to operate, the big and high characteristics of stability of intensity as the 5 schemes of first limit structure of preferred.

In the embodiment of the application, the gear set 1 comprises a planet shaft 7, planet wheels 8, a first axle shaft 9 and a second axle shaft 10. The planet wheels 8 are in clearance fit with the planet shaft 7, and the planet wheels 8 can rotate around the planet shaft 7. When a vehicle turns during running, the planetary gear 8 performs a differential motion around the planetary shaft 7 to transmit power to the wheels, thereby functioning as a differential. The gear on the first axle shaft 9 meshes with the planet wheels 8 and the gear on the second axle shaft 10 meshes with the planet wheels 8. The two half shafts are respectively meshed with the planet wheel 8 in the differential shell, when differential motion occurs, the planet wheel 8 transmits power to the connected wheel structure through the two half shafts respectively, and the phenomenon that the wheel slips when the vehicle turns is reduced by forming differential motion through the rotation of the planet wheel 8.

In the embodiment of the present application, the planet shaft 7 penetrates through the housing 2, the planet shaft 7 and the housing 2 are in clearance fit, and the rotation of the housing 2 drives the planet shaft 7. In order to prevent the planet shaft 7 from shifting and loosening in the rotating process, a second limiting structure 11 is further arranged between the planet shaft 7 and the shell 2. The selection of the second limiting structure 11 can be determined according to the required limiting strength between the planet shaft 7 and the housing 2, for example, the snap ring 6 can be selected as the limiting component between the planet shaft 7 and the housing 2, because the snap ring 6 can be tightly attached to the planet shaft 7 and the housing 2 along the annular space between the planet shaft 7 and the housing 2, the occurrence of the situation that the planet shaft 7 is offset and loosened can be reduced.

In the present embodiment, the first half shaft 9 is in clearance fit with the housing 2 and the cover plate 3, and the second half shaft 10 is in clearance fit with the housing 2 and the cover plate 3. Be equipped with spiral oil groove 12 on casing 2 and the apron 3, the lubricating oil that pours into in advance among the spiral oil groove 12 lubricates two semi-axes in the use, reduces the semi-axis and rotates the friction of in-process, reduces the wearing and tearing of semi-axis in the use, improves the security and the reliability of this application embodiment.

In the present embodiment, a spacer 13 is provided between the cover plate 3 and the first half shaft 9, and both surfaces of the spacer 13 are in contact with the cover plate 3 and the first half shaft 9, respectively. In the installation process, the first half shaft 9 is meshed with the planet wheel 8, pad selection measurement is carried out after the cover plate 3 is covered, the standard specification of the pad 13 is selected, the pad 13 is installed after the cover plate 3 is removed, finally the cover plate 3 is installed, and the snap ring 6 is placed in the groove of the snap ring 6, so that the pad selection installation process is completed. In the embodiment of the application, through the matching of the cover plate 3 and the shell 2, special mounting tools and equipment are not needed, and the convenience of mounting and dismounting the differential is improved.

The embodiment of the application also discloses a vehicle, which comprises the differential mechanism structure.

Based on the above, several embodiments are described below.

Example 1:

in this embodiment 1, the snap ring 6 is selected as the first limiting structure 5 between the housing 2 and the cover plate 3, please refer to fig. 3, and fig. 3 is a schematic partial structure diagram of the cover plate 3 in this embodiment 1. In the annular space between casing 2 and apron 3, snap ring 6 prevents apron 3 at the ascending removal of axial as stop block, simultaneously through the involute spline connection between casing 2 and the apron 3, interference fit is fixed, has strengthened reliability and security among the power transmission process. Meanwhile, the snap ring 6 is selected as a component of the second limiting structure 11 between the planet shaft 7 and the shell 2 and is installed between the planet shaft 7 and the shell 2, so that the planet shaft 7 is prevented from moving in position in the rotating process, and the reliability of the embodiment 1 is improved. Select suitable gasket 13 standard component through selecting the mode of filling up the measurement to carry out apron 3's installation through spline connection, the spacing mode of snap ring 6, improved the convenience of installation and dismantlement. In the embodiment 1, the ring gear 4 and the housing 2 are connected by welding, which not only provides a larger selectable range for the connection position of the ring gear 4, but also makes the arrangement of the differential more flexible.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A differential mechanism structure characterized by: comprises a differential housing and a gear set (1);

the gear set (1) is positioned inside the differential shell, and the gear set (1) is in clearance fit with the differential shell;

the differential shell comprises a shell (2), a cover plate (3) and a gear ring (4);

the shell (2) is connected with the cover plate (3) through a key, and a first limiting structure (5) is arranged between the shell (2) and the cover plate (3);

and the gear ring (4) and the shell (2) are welded and fixed.

2. The differential structure of claim 1, wherein: the shell (2) is connected with the cover plate (3) through a spline.

3. The differential structure of claim 1, wherein: first limit structure (5) include snap ring (6), snap ring (6) are used for preventing apron (3) to take place axial displacement.

4. The differential structure of claim 1, wherein: the gear set (1) comprises a planet shaft (7), a planet wheel (8), a first half shaft (9) and a second half shaft (10);

the planet wheel (8) is in clearance fit with the planet shaft (7), and the planet wheel (8) can rotate around the planet shaft (7).

5. The differential structure of claim 4, wherein: the planet shaft (7) penetrates through the shell (2), and the planet shaft (7) is in clearance fit with the shell (2).

6. The differential structure of claim 5, wherein: and a second limiting structure (11) is also arranged between the planet shaft (7) and the shell (2).

7. The differential structure of claim 4, wherein:

the first half-shaft (9) meshes with the planet wheels (8), the second half-shaft (10) meshes with the planet wheels (8);

the first half shaft (9) is in clearance fit with the shell (2) and the cover plate (3), and the second half shaft (10) is in clearance fit with the shell (2) and the cover plate (3).

8. The differential structure of claim 6, characterized in that; the shell (2) and be equipped with spiral oil groove (12) on apron (3), spiral oil groove (12) are used for the lubrication first semi-axis (9) with second semi-axis (10).

9. The differential structure of claim 4, wherein: a gasket (13) is arranged between the cover plate (3) and the first half shaft (9), and two surfaces of the gasket (13) are respectively abutted against the cover plate (3) and the first half shaft (9).

10. A vehicle, characterized in that: comprising the differential construction according to any one of claims 1-9.