Differential gear for a differential

Abstract

The utility model relates to the technical field of bevel gear, disclose a differential gear for differential, including gear body and the dedendum of setting at the bottom of gear body, the periphery of gear body is equipped with the multiple gear teeth that evenly distribute along the circumferential direction, form the gear slot between the adjacent gear tooth, the depth distance of the bottom of gear slot relative to the depth between the top of gear body is 18.42mm, the transition arc surface with the radius of 1.5mm is formed to the groove bottom of gear slot and the dedendum transition area of gear body, the tooth tip of every gear tooth is equipped with the inclined plane, and the inclination of inclined plane and gear tooth radial plane is 4, the device solves the problem that the tooth tip inclined plane angle and the chamfer structure lack optimization, causes the problem that the impact phenomenon is remarkable in the meshing process, reaches the effect that promotes the structural stability and service life of gear whole.

Description

Technical Field

[0001] This utility model relates to the field of helical gear technology, and more specifically, to a differential gear for a differential. Background Technology

[0002] As a core component of the automotive transmission system, the differential's performance directly affects the vehicle's handling stability and driving safety. The differential gear, a key transmission component of the differential, is typically composed of meshing planetary gears and half-shaft gears, and must possess high-precision tooth profiles, high strength, and wear resistance to adapt to complex operating conditions.

[0003] Currently, differential gears, as the core component of differentials, play a crucial role in the reliability and efficiency of vehicle transmission systems. However, existing differential gears have several shortcomings: the tooth groove depth and tooth root transition arc design of some differential gears are inadequate, which may affect the meshing performance of the gears after processing.

[0004] The lack of optimization in the angle of the tooth tip inclination and the chamfer structure leads to significant impact during meshing, which in turn causes problems such as increased wear and noise, reducing the service life of the gears and the smoothness of transmission. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a differential gear for a differential.

[0006] To achieve the above objectives, this utility model provides the following technical solution: it includes a gear body and a tooth root disposed at the bottom of the gear body. The outer periphery of the gear body is provided with a plurality of teeth evenly distributed in the circumferential direction, and a tooth groove is formed between adjacent teeth. The depth of the bottom of the tooth groove relative to the depth distance between the top of the gear body is 18.42 mm. The bottom of the tooth groove and the tooth root transition area of ​​the gear body form a transition arc surface with a radius of 1.5 mm. The tip of each tooth is provided with an inclined surface, and the inclination of the inclined surface to the radial plane of the tooth is 4°.

[0007] The present invention is further configured such that: multiple tooth grooves are arranged in an array along the outer circumference of the gear body, and each tooth groove is arranged adjacent to a tooth.

[0008] The present invention is further configured such that the angle between the central axis cross-section of the multiple tooth grooves and the central axis cross-section of the adjacent tooth is 11.25°.

[0009] The present invention is further configured such that a transition section is provided between the bottom end face of the gear body and the outer top of the tooth root.

[0010] The present invention is further configured such that the transition section is formed as a concave semi-circular structure, and the concave angle of the concave semi-circular structure is 1.6°.

[0011] The present invention is further configured such that an angle A of 14°-16° is formed between the concave center point of the transition section and the bottom section of the gear body 1.

[0012] By adopting the above scheme, the structural strength of the transition section is guaranteed, and the fit between the gear teeth and the surrounding components is made more reasonable, reducing local stress overload during gear body operation.

[0013] The present invention is further configured such that: the transition section is opened around the bottom of the gear body and the outer side of the tooth root 2.

[0014] By adopting the above technical solution, the transition section is opened around the bottom and the outer side of the tooth root, which can make the entire circumferential area of ​​the connection between the gear body and the tooth root obtain a uniform stress dispersion effect.

[0015] In summary, this application includes at least one of the following beneficial technical effects: By setting the gear body and tooth root, and opening the transition section around the bottom and the outside of the tooth root, the entire circumferential area of ​​the connection between the gear body and the tooth root can obtain a uniform stress dispersion effect, improve the overall structural stability and service life of the gear teeth, and at the same time adapt to the annular installation space in the differential. Attached Figure Description

[0016] Figure 1 This is a first-view perspective three-dimensional structural diagram of a differential gear for a differential according to the present invention; Figure 2 This is a top view of a differential gear for a differential according to the present invention. Figure 3 This is a partial cross-sectional three-dimensional structural view of a differential gear for a differential according to the present invention; Figure 4 This is a front view of the differential gear for a differential according to the present invention. Figure 5 This is a front cross-sectional view of a differential gear for a differential according to the present invention. Figure 6 for Figure 5 Enlarged structural diagram at point B; Explanation of reference numerals in the attached drawings: 1. Gear body; 2. Tooth root; 11. Gear tooth; 111. Transition section; 12. Tooth groove; 121. Transition arc surface; 13. Inclined surface. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] Please see Figures 1-6 The present invention provides the following technical solution: Example 1: In order to solve the technical problem that existing differential gears have large meshing impacts due to the gear design structure during operation.

[0020] The gear includes a gear body 1 and a tooth root 2 located at the bottom of the gear body 1. The outer periphery of the gear body 1 is provided with a plurality of teeth 11 evenly distributed in the circumferential direction, and a tooth groove 12 is formed between adjacent teeth 11. The depth distance between the bottom depth of the tooth groove 12 and the top depth of the gear body 1 is 18.42 mm. The bottom of the tooth groove 12 and the transition area between the tooth root 2 of the gear body 1 form a transition arc surface 121 with a radius of 1.5 mm. The tip of each tooth 11 is provided with an inclined surface 13, and the inclination of the inclined surface 13 to the radial plane of the tooth 11 is 4°.

[0021] In this embodiment, the gear body 1 is a helical gear, and the effective tooth pitch of adjacent teeth 11 is 5.37 mm. The gear body 1 meshes with the mating teeth 11 through the evenly distributed teeth 11 on its outer periphery. The tooth groove 12 provides meshing space for the teeth 11 of the mating gear. The tooth groove depth of 18.42 mm ensures the effective meshing amount when the teeth 11 mesh. The transition arc surface 121 with a radius of 1.5° can avoid stress concentration in the transition area between the bottom of the tooth groove 12 and the tooth root 2, and improve the structural strength. The inclined surface 13 of the tooth tip of the tooth 11 is at 4° to the radial plane, which can reduce the impact at the beginning of meshing and make the meshing of the gear body 1 smoother.

[0022] See Figure 2 Multiple tooth grooves 12 are arranged in an array along the outer circumference of the gear body 1, and each tooth groove 12 is arranged adjacent to the gear tooth 11.

[0023] In this embodiment, the tooth grooves 12 are arranged in a circumferential array along the gear body 1, which can ensure that each tooth 11 is subjected to uniform force, making the load distribution of the gear body 1 more balanced when transmitting power, and reducing the overload damage of local teeth 11.

[0024] See Figure 2 and Figure 3 The angle between the central axis cross section of the multiple tooth grooves 12 and the central axis cross section of the adjacent tooth 11 is 11.25°.

[0025] In this embodiment, the 11.25° angle between the tooth groove 12 and the central axis cross section of the adjacent tooth 11 ensures that the spatial layout of the adjacent tooth 11 and the tooth groove 12 meets the tooth pitch requirements for meshing of the tooth 11 when the gear body 1 is in operation, thus guaranteeing the transmission accuracy and stability when meshing with the mating tooth 11.

[0026] See Figure 6 A transition section 111 is provided between the bottom end face of the gear body 1 and the outer top of the tooth root 2.

[0027] In this embodiment, the transition section 111 between the bottom of the gear body 1 and the tooth root 2 can optimize the connection structure between the bottom of the gear tooth 11 and the tooth root 2, avoid stress concentration in the connection area due to abrupt shape changes, and improve the structural reliability of the connection between the gear body 1 and the tooth root 2.

[0028] See Figure 5 and Figure 6 The transition section 111 is formed as a concave semi-circular structure, and the concave angle of the concave semi-circular structure is 1.6°.

[0029] In this embodiment, the concave angle of the concave semi-circular transition section 111 is preferably 1.6°, which can further disperse the stress in the connection area between the gear body 1 and the tooth root 2, and at the same time reserve reasonable space for the installation or mating parts of the gear tooth 11 to avoid assembly interference.

[0030] See Figure 6 An angle A of 14°-16° is formed between the concave center point of the transition section 111 and the bottom section of the gear body 1.

[0031] In this embodiment, the angle A is preferably within a tolerance of 15°±1°. Combined with the installation space of the gear teeth 11, this ensures the structural strength of the transition section 111 and reduces local stress overload when the gear body 1 is working.

[0032] See Figure 5 and Figure 6 The transition section 111 is opened around the bottom of the gear body 1 and the outside of the tooth root 2.

[0033] The transition section 111 is opened around the bottom and the outer side of the tooth root 2, which can make the entire circumferential area of ​​the connection between the gear body 1 and the tooth root 2 obtain a uniform stress dispersion effect, improve the overall structural stability and service life of the gear tooth 11, and at the same time adapt to the annular mounting space in the differential.

[0034] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A differential gear for a differential, characterized in that: It includes a gear body (1) and a tooth root (2) set at the bottom of the gear body (1). The outer periphery of the gear body (1) is provided with a plurality of teeth (11) evenly distributed in the circumferential direction, and a tooth groove (12) is formed between adjacent teeth (11). The depth distance between the bottom depth of the tooth groove (12) and the top depth of the gear body (1) is 18.42 mm; The bottom of the tooth groove (12) and the tooth root (2) of the gear body (1) form a transition arc surface (121) with a radius of 1.5 mm. Each tooth (11) has an inclined surface (13) at its tip, and the inclination of the inclined surface (13) to the radial plane of the tooth (11) is 4°.

2. A differential gear for a differential according to claim 1, characterized in that: Multiple tooth grooves (12) are arranged in an array along the outer circumference of the gear body (1), and each tooth groove (12) is arranged adjacent to the gear tooth (11).

3. A differential gear for a differential according to claim 2, characterized in that: The angle between the central axis cross section of multiple tooth grooves (12) and the central axis cross section of the adjacent tooth (11) is 11.25°.

4. A differential gear for a differential according to claim 3, characterized in that: A transition section (111) is provided between the bottom end face of the gear body (1) and the outer top of the tooth root (2).

5. A differential gear for a differential according to claim 4, characterized in that: The transition section (111) is formed as a concave semi-circular structure, and the concave angle of the concave semi-circular structure is 1.6°.

6. A differential gear for a differential according to claim 5, characterized in that: An angle A of 14°-16° is formed between the concave center point of the transition section (111) and the bottom section of the gear body (1).

7. A differential gear for a differential according to claim 6, characterized in that: The transition section (111) is opened around the bottom of the gear body (1) and the outside of the tooth root (2).

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