Differential case structure

Abstract

The utility model discloses a differential mechanism shell structure relates to differential mechanism technical field, including main casing and weight reduction subassembly, one end of main casing is provided with reinforcing assembly, and reinforcing assembly includes weight reduction part and reinforcing rib, one end of main casing is provided with weight reduction part, and the outside fixed reinforcing rib of weight reduction part, weight reduction subassembly sets up in the other end of main casing. This differential mechanism shell structure is provided with reinforcing assembly, and the material redundancy problem existing in the overall spherical surface structure of the traditional differential mechanism shell is solved, the corresponding area of the shell is partially and specifically cut and optimized in a large range, a regular weight reduction part is formed, the amount of redundant material is effectively reduced, meanwhile, reinforcing ribs equally distributed along the circumference of the main casing are arranged on the outside of the weight reduction part, through the composite structure design of weight reduction and reinforcement, the material consumption and processing cost of the shell are significantly reduced, and the stress of the shell is dispersed and the structural deformation is inhibited through the supporting effect of the reinforcing ribs.

Description

Technical Field

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

[0002] The differential assembly typically consists of core components such as the differential housing, half-shaft gears, planetary gears, planetary shafts, planetary gear washers, half-shaft gear washers, and pins, making it a critical component of the vehicle's transmission system. The differential housing, as the core load-bearing and transmission component, serves two main functions: firstly, protecting internal precision transmission components like bevel gears from external environmental interference or mechanical damage; and secondly, transmitting torque to ensure stable power distribution and efficient transmission between different output shafts, guaranteeing steering agility and power transmission reliability during vehicle operation. In today's increasingly competitive market, product pricing directly impacts bidding results, making cost control a core competitive factor in the differential housing sector. The competitive cost of a differential housing is highly correlated with its weight, and the market urgently demands products that combine lightweight characteristics with high torque capacity. Only low-priced, high-quality solutions can create a core competitive advantage.

[0003] However, the existing differential housing has obvious shortcomings in its structural design. The transition surface design used at the connection between the shaft hole and the flange in most housings is unreasonable, which easily leads to stress concentration in this area. When the stress concentration problem cannot be alleviated by structural optimization, the only way to reduce stress risk is to increase the housing wall thickness. This not only leads to a significant increase in housing weight, but also directly increases material and manufacturing costs, ultimately weakening the product's market competitiveness. Utility Model Content

[0004] The purpose of this invention is to provide a differential housing structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a differential housing structure, comprising a main housing and a weight reduction component, wherein a reinforcing component is provided at one end of the main housing, and the reinforcing component includes a weight-reducing part and a reinforcing rib; a weight-reducing part is provided at one end of the main housing, and a reinforcing rib is fixed to the outside of the weight-reducing part; the weight reduction component is provided at the other end of the main housing, and the weight reduction component includes a transition part and a weight reduction part; a transition part is provided in the middle of the main housing, and a weight reduction part is provided at the other end of the main housing.

[0006] Furthermore, the main shell is in the shape of a hollow frustum, and the reinforcing ribs are distributed equidistantly around the outer side of the main shell.

[0007] Furthermore, the transition portion has a large rounded corner with a radius of 60 mm.

[0008] Furthermore, a flange is fixed to the outer side of the middle part of the main housing, and a connection hole is opened inside the outer periphery of the flange.

[0009] Furthermore, the reinforcing rib is triangular in shape and is fixedly connected to the flange.

[0010] Furthermore, mounting holes are provided on the upper and lower sides of the middle part of the main housing, and clearance holes are provided on the front and rear sides of the middle part of the main housing.

[0011] Furthermore, bearing seats are provided at both ends of the main housing, and the axis of the bearing seats coincides with the axis of the flange.

[0012] Furthermore, the bearing housing has a threaded groove on its inner side and a limiting groove on one side.

[0013] This utility model provides a differential housing structure, which has the following advantages: 1. This utility model addresses the material redundancy problem of the traditional differential housing's overall spherical structure by strengthening the component settings. It optimizes the corresponding area of ​​the housing by performing localized, targeted, large-scale weight reduction cutting to form a regular weight-reducing section, effectively reducing the amount of redundant material used. At the same time, it provides reinforcing ribs that are equidistantly distributed along the circumference of the main housing on the outside of the weight-reducing section. Through the composite structural design of weight reduction and reinforcement, it not only significantly reduces the material consumption and processing cost of the housing, but also disperses the stress on the housing and suppresses structural deformation through the supporting effect of the reinforcing ribs, greatly improving the overall structural stability and strength of the housing. This ensures that it can still stably withstand the high torque transmission requirements under complex working conditions such as heavy vehicle loads and climbing, fully meeting the reliability requirements of the transmission system. 2. This utility model optimizes the structure of the connection between the inclined surface in the middle of the main shell and the weight-reducing part by setting a transition part. It adopts a large rounded corner transition design with a radius of 60mm to replace the traditional angled corner transition method. This design can evenly distribute stress along the arc surface, avoiding the defect of stress concentration at the corners that is easy to form in traditional angled corner transitions. Due to the risk of stress concentration, traditional structures often need to increase the wall thickness to ensure structural safety. However, this solution can solve the stress problem by optimizing the transition form without increasing the wall thickness. While effectively controlling the overall weight of the shell, it further reduces material and manufacturing costs. 3. By designing a weight-reducing section, this utility model addresses the issue that, since this area is far from the core power transmission path and primarily bears indirect loads during operation, the required strength is significantly lower than that of critical load-bearing components such as shaft holes and bearing seats. Therefore, it is not necessary for this area to maintain the same wall thickness as high-stress areas. Based on this stress characteristic, this solution implements a large-scale weight-reduction design for the weight-reducing section. While ensuring the support of the basic structure, redundant materials are reduced by locally thinning the wall thickness and optimizing the contour shape. This not only directly reduces the manufacturing cost of the shell and the unsprung mass after vehicle assembly but also indirectly improves the vehicle's fuel economy. This aligns with the current automotive industry's trend towards lightweighting and low-cost manufacturing, significantly enhancing the product's market competitiveness. Attached Figure Description

[0014] Figure 1 This is a three-dimensional right-side view of the overall structure of a differential housing according to the present invention; Figure 2 This is a three-dimensional left view schematic diagram of the differential housing structure of this utility model; Figure 3 This is a schematic cross-sectional view of the differential housing structure of this utility model.

[0015] In the figure: 1. Main shell; 2. Reinforcing component; 201. Weight-reducing part; 202. Reinforcing rib; 3. Weight-reducing component; 301. Transition part; 302. Weight-reducing part; 4. Flange; 5. Connection hole; 6. Mounting hole; 7. Clearance hole; 8. Bearing seat; 9. Threaded groove; 10. Limiting groove. Detailed Implementation

[0016] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0017] like Figure 1 and Figure 2As shown, a differential housing structure includes a main housing 1 and a weight-reducing component 3. A reinforcing component 2 is provided at one end of the main housing 1, and the reinforcing component 2 includes a weight-reducing portion 201 and a reinforcing rib 202. The weight-reducing portion 201 is formed by optimizing the overall spherical surface of the original differential housing to reduce weight, thereby reducing the overall weight and cost. The main housing 1 is in the shape of a hollow frustum, and the reinforcing ribs 202 are equidistantly distributed circumferentially along the outer side of the main housing 1. The reinforcing ribs 202 reinforce the weight-reducing portion 201, improving overall stability and strength to meet high torque requirements. The weight-reducing component 3 is located at the other end of the main housing 1, and the weight-reducing component 3 includes a transition portion 301 and a weight-reducing portion 302. The transition portion 301 is provided in the middle of the main housing 1. The other end of the main housing 1 is provided with a weight reduction section 302. Since the weight reduction section 302 area is subjected to low stress when the differential is working, it does not need to maintain the same wall thickness as the shaft hole, thereby enabling large-scale weight reduction, reducing corresponding costs, and increasing competitiveness. The transition section 301 is in the shape of a large rounded corner with a radius of 60mm. The use of a large rounded corner transition can greatly avoid stress concentration. Compared with the existing use of oblique corner transition, it can prevent the increase in wall thickness due to stress concentration, thereby increasing costs. A flange 4 is fixed on the outer side of the middle part of the main housing 1, and a connection hole 5 is opened in the inner periphery of the flange 4. The flange 4 is fixed to the gear ring through the connection hole 5 and bolts. The reinforcing rib 202 is triangular and is fixedly connected to the flange 4. The stability of the triangle is used to improve the stability between the main housing 1 and the flange 4.

[0018] like Figure 3 As shown, mounting holes 6 are provided on the upper and lower sides of the middle part of the main housing 1, and clearance holes 7 are provided on the front and rear sides of the middle part of the main housing 1. The clearance holes 7 facilitate the placement of the gear set into the interior of the main housing 1 for assembly. The planetary gear module can be installed at the mounting holes 6. Bearing seats 8 are provided at both ends of the main housing 1, and the axis of the bearing seat 8 coincides with the axis of the flange 4. The inner side of the bearing seat 8 is provided with a threaded groove 9, and a limiting groove 10 is provided on one side of the bearing seat 8. The threaded groove 9 and the limiting groove 10 on the bearing seat 8 facilitate the fixed connection with the bearing.

[0019] In summary, regarding the differential housing structure, when using it, firstly according to... Figure 1 , Figure 2 and Figure 3The structure shown allows for easy connection to the bearing during assembly via the threaded groove 9 and the limiting groove 10 on the bearing seat 8. The planetary gear module is then fixed at the mounting hole 6. The gear set is then easily inserted into the main housing 1 via the clearance hole 7 for assembly. Next, the flange 4 is fixed to the gear ring via the connecting hole 5 and bolts, thus completing the differential assembly. Finally, during use, the weight-reducing section 201 and reinforcing rib 202 not only reduce the overall cost of the differential housing but also improve overall stability and strength, while still meeting high torque requirements. The area where the weight-reducing section 302 is located experiences lower stress during differential housing operation, allowing for a significant weight reduction as the wall thickness does not need to be the same as that at the shaft hole. The transition section 301 facilitates the transition between the central inclined surface of the main housing 1 and the weight-reducing section 302. The large rounded corner transition greatly avoids stress concentration, which, compared to existing methods using angled transitions, prevents stress concentration at this point, eliminates the need to increase wall thickness, and thus reduces costs.

[0020] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A differential housing structure, comprising a main housing (1) and a weight reduction component (3), characterized in that, One end of the main housing (1) is provided with a reinforcing component (2), and the reinforcing component (2) includes a weight-reducing part (201) and a reinforcing rib (202). One end of the main housing (1) is provided with a weight-reducing part (201), and a reinforcing rib (202) is fixed on the outside of the weight-reducing part (201). The weight-reducing component (3) is provided at the other end of the main housing (1), and the weight-reducing component (3) includes a transition part (301) and a weight-reducing part (302). The middle part of the main housing (1) is provided with a transition part (301), and the other end of the main housing (1) is provided with a weight-reducing part (302).

2. The differential housing structure according to claim 1, characterized in that, The main shell (1) is in the shape of a hollow frustum, and the reinforcing ribs (202) are distributed equidistantly around the outer side of the main shell (1).

3. A differential housing structure according to claim 1, characterized in that, The transition section (301) has a large rounded corner and the radius of the rounded corner is 60mm.

4. A differential housing structure according to claim 1, characterized in that, A flange (4) is fixed on the outer side of the middle part of the main housing (1), and a connection hole (5) is opened inside the outer periphery of the flange (4).

5. A differential housing structure according to claim 4, characterized in that, The reinforcing rib (202) is triangular and is fixedly connected to the flange (4).

6. A differential housing structure according to claim 1, characterized in that, Mounting holes (6) are provided on the upper and lower sides of the middle part of the main housing (1), and clearance holes (7) are provided on the front and rear sides of the middle part of the main housing (1).

7. A differential housing structure according to claim 1, characterized in that, The main housing (1) is provided with bearing seats (8) at both ends, and the axis of the bearing seat (8) coincides with the axis of the flange (4).

8. A differential housing structure according to claim 7, characterized in that, The bearing housing (8) has a threaded groove (9) on its inner side and a limiting groove (10) on one side of the bearing housing (8).

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