阅读说明：本技术 一种新型连接结构的轻量化差速器壳体 (Novel connection structure's lightweight differential mechanism casing ) 是由 陈伟 余小军 王坤 于 2019-11-22 设计创作，主要内容包括：一种新型连接结构的轻量化差速器壳体,产品焊接区域轮廓与齿圈采用焊接方式连接；轴销孔与产品轴销贯穿连接；左/右两端轴承的左端和右端各连一个轴承；卡簧与差速器壳通过卡簧槽连接并紧固；轻量化差速器壳体的侧面设有侧面两处减重凹槽；左/右行星轴孔与动力轴连接,传递输出扭矩；轻量化差速器壳体中心处设有两侧齿轮安装窗口；内球面与塑料衬套连接,衬套与各齿轮连接；产品焊接区域轮廓上设有端面减重凹槽；左/右两端轴承上设有导油润滑槽。本装置采用一体化设计,外斜面有减重凹槽设计,而且外侧斜面部分不需要加工。因此产品本身从设计上具有轻量化的低成本优势。(A lightweight differential shell with a novel connecting structure is characterized in that the outline of a welding area of a product is connected with a gear ring in a welding mode; the shaft pin hole is connected with the product shaft pin in a penetrating way; the left end and the right end of the bearing at the left/right ends are respectively connected with a bearing; the clamp spring is connected and fastened with the differential shell through a clamp spring groove; two weight-reducing grooves are formed in the side face of the light-weight differential shell; the left/right planetary shaft hole is connected with the power shaft to transmit output torque; the center of the light differential shell is provided with gear mounting windows at two sides; the inner spherical surface is connected with a plastic bushing, and the bushing is connected with each gear; an end surface weight reduction groove is arranged on the outline of the product welding area; the bearings at the left/right ends are provided with oil guide lubricating grooves. The device adopts an integrated design, the outer inclined plane is provided with a weight reduction groove, and the part of the outer inclined plane does not need to be processed. Therefore, the product has the advantage of light weight and low cost in design.)

1. A lightweight differential shell with a novel connecting structure is characterized by comprising a product welding area outline (1), a shaft pin hole (2), a left/right two-end bearing (3), a clamp spring groove (4), two side lightening grooves (5), a left/right planet shaft hole (6), two side gear mounting windows (7), an inner spherical surface (8), an end lightening groove (9) and an oil guiding lubricating groove (10);

the product welding area outline (1) is connected with the gear ring in a welding mode; the shaft pin hole (2) is connected with a product shaft pin in a penetrating way; the left end and the right end of the left/right two-end bearing (3) are respectively connected with a bearing; the clamp spring is connected and fastened with the differential shell through the clamp spring groove (4); two weight-reducing grooves (5) are formed in the side face of the light-weight differential case; the left/right planetary shaft hole (6) is connected with a power shaft and used for transmitting output torque; the center of the light-weight differential shell is provided with the gear mounting windows (7) on the two sides; the inner spherical surface (8) is connected with a plastic bushing, and the bushing is connected with each gear; the end face weight-reducing groove (9) is formed in the product welding area outline (1); the left/right end bearings (3) are provided with the oil guide lubricating grooves (10).

Technical Field

The invention relates to the technical field of automobile manufacturing, in particular to a lightweight differential shell with a novel connecting structure.

Background

A differential shell belongs to a key part of a gearbox assembly. Due to the promotion of the new energy automobile in the large direction and the market, the development of the differential shell suitable for the new energy automobile is a necessary trend at present. The differential shell structure is simple in structure, reliable in performance, large in starting torque, light in weight and good in technical advantage and market prospect.

Disclosure of Invention

The invention aims to provide a light differential case with a novel connecting structure.

In order to achieve the purpose, the invention adopts the following technical scheme: a lightweight differential shell with a novel connecting structure comprises a product welding area outline (1), a shaft pin hole (2), a left/right two-end bearing (3), a clamp spring groove (4), two weight-reducing grooves (5) on the side surface, a left/right planet shaft hole (6), two side gear mounting windows (7), an inner spherical surface (8), an end surface weight-reducing groove (9) and an oil-guiding lubricating groove (10);

the product welding area outline (1) is connected with the gear ring in a welding mode; the shaft pin hole (2) is connected with a product shaft pin in a penetrating way; the left end and the right end of the left/right two-end bearing (3) are respectively connected with a bearing; the clamp spring is connected and fastened with the differential shell through the clamp spring groove (4); two weight-reducing grooves (5) are formed in the side face of the light-weight differential case; the left/right planetary shaft hole (6) is connected with a power shaft and used for transmitting output torque; the center of the light-weight differential shell is provided with the gear mounting windows (7) on the two sides; the inner spherical surface (8) is connected with a plastic bushing, and the bushing is connected with each gear; the end face weight-reducing groove (9) is formed in the product welding area outline (1); the left/right end bearings (3) are provided with the oil guide lubricating grooves (10).

The invention has the beneficial effects that: the device adopts an integrated design, the outer inclined plane is provided with a weight reduction groove, and the part of the outer inclined plane does not need to be processed. Therefore, the product has the advantage of light weight and low cost in design.

In the aspect of manufacturing, the design scheme of a wedge-shaped profile is adopted for the part of the device, which is combined with the gear ring; the gear ring is matched with the gear ring and connected in a laser welding mode. Compared with other products, the structure without the bolt holes or the riveting surfaces has the advantages in manufacturing cost and obvious economic benefits.

Drawings

FIG. 1 is a schematic view of a part structure;

FIG. 2 is a part cut-away view;

fig. 3 is a partial view of a product weld site.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

As shown in fig. 1-2, a lightweight differential case with a novel connection structure comprises a product welding area outline 1, a shaft pin hole 2, a left/right two-end bearing 3, a clamp spring groove 4, two lateral weight-reducing grooves 5, a left/right planet shaft hole 6, two side gear mounting windows 7, an inner spherical surface 8, an end surface weight-reducing groove 9 and an oil-guiding lubricating groove 10.

1) And (5) casting.

1. The material is as follows: adopting QT600-3 grade nodular cast iron; but for the welding part, the spheroidization rate of the material must reach 60-95%; the product manufacturing is better realized by considering the rationality of manufacturing and the material requirement of the welding part aiming at the condition that the performance meets the design requirement of the product, so that the assembly performance of the product meets the expected design requirement.

2. The process comprises the following steps: the development of the casting mold can adopt a vertical parting mode to realize the integrated molding of a plurality of molds.

2) And (6) processing.

In the aspect of processing, 5 horizontal numerical control vehicles and 1 vertical processing center (equipped with 4 shafts) are adopted, and the assembly of a single production line can be realized.

3) And (6) assembling the assembly.

For each part in fig. 1, the corresponding relationship of the assembly assembling process is as follows:

the product welding area outline 1 is connected with the gear ring in a welding mode;

the shaft pin hole 2 is connected with a product shaft pin in a penetrating way;

the left end and the right end of the left/right two-end bearing 3 are respectively connected with a bearing;

the clamp spring is connected and fastened with the differential shell through a clamp spring groove 4;

the two weight-reducing grooves 5 on the side surfaces have no installation requirement;

the left/right planet shaft holes 6 are connected with the power shaft; transmitting the output torque;

the gear mounting windows 7 on the two sides belong to windows for mounting gears and allowing a cutter for spherical machining to enter;

the inner spherical surface 8 is connected with a plastic bushing, and the bushing is connected with each gear; the friction between the spherical surface and the plastic sleeve in the power transmission process reduces the noise.

An end face weight reduction groove 9 which belongs to a weight reduction design and allows a blank mark to be positioned at the part;

the oil guide lubricating groove 10 belongs to a lubricating noise reduction design, reduces abrasion, and improves the service life and performance of a product.

The product structure is optimized, and the product is designed in a light weight mode. Compared with other weight-reducing product structures, the structure has the advantages of manufacturing cost (the weight-reducing part does not need to be machined and is ensured by casting size);

the product structure development that adopts laser welding, integral poor shell structure, the commonality is strong, and the starting torque is big. Compared with the traditional bolt connection structure, riveting type structure and split type differential shell structure, the manufacturing process does not need to increase bolt hole machining and purchasing of bolt materials, the cost is advantageous, and the assembly performance is more competitive.

The lightweight differential shell provided by the invention has the assembly performance, and is not only suitable for traditional fuel vehicles, but also particularly suitable for new energy vehicles with light vehicle weight and large torque requirements. On the basis of the structure of the previous generation product, the differential shell is structurally optimized, light in weight design consideration is considered, the test performance of an assembly is considered, and the differential shell has the advantages of being simple and reliable in installation, excellent in performance, light in weight and large in output torque.

The invention has the beneficial technical effects that the differential shell achieves the effects of light weight, high strength, large starting torque, good welding effect of subsequent assemblies, obvious cost advantage and the like by using QT600-3 materials or other equivalent mark materials with similar performance and reasonably designing the product structure.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.