Differential gear with lightening grooves

Abstract

The utility model provides a differential gear with lightening grooves, and belongs to the technical field of gears. The problems that in the prior art, a gear installation structure is complex, and cost is high are solved. The gear comprises an outer gear and an inner gear, the outer gear and the inner gear are both in a circular ring shape, the outer gear is arranged outside the inner gear in a sleeved mode, a plurality of inclined gear teeth are arranged on the peripheral face of the outer gear, a protection ring is arranged on the edge of the inner side of the outer gear, and a plurality of lightening grooves are formed in the gear faces of the two sides of the outer gear in an annular array mode. The gear face of the outer gear is arranged between every two lightening grooves, a plurality of inclined faces are formed by the two sides of each lightening groove and the gear face, a connecting groove is formed in the outer gear, and connecting teeth are fixedly installed on the outer circumferential face of the inner gear and connected with the connecting groove in a matched mode. The LED lamp has the advantages of being simple in structure, high in strength, convenient to install, high in stability after installation, long in service life and good in heat dissipation performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of gears and relates to a differential gear with a lightening groove. Background Art

[0002] The differential is installed in the car to enable the left, right or front and rear drive wheels of the car to rotate at different speeds. The differential gear is an important component in the differential.

[0003] A Chinese patent with publication number CN207364229U discloses a differential gear with a lightening groove, including an outer gear and an inner gear, wherein the inner gear is installed on the inner side of the outer gear, a circular groove is provided on the circumferential surface of the inner cavity of the outer gear, balls are installed on the upper and lower sides of the inner cavity of the circular groove, and protective devices are installed on the left and right sides of the inner gear, the protective device includes an inner cylinder, the inner cylinder is connected to the inner gear, an outer cylinder is sleeved on the outer side of the inner cylinder, a slide rod is installed on the outer side of the outer cylinder, the slide rod matches the circular groove, and slide grooves are provided on the upper and lower surfaces of the slide rod, and the slide grooves are connected with the balls.

[0004] The utility model adopts a protective device to improve the strength of the differential gear, but the process is relatively complicated and the cost is high. Utility Model Content

[0005] The utility model aims to provide a differential gear with a lightening groove in view of the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a differential gear with a lightening groove, comprising an outer gear and an inner gear, the outer gear and the inner gear are both in annular shape and the outer gear is sleeved on the outside of the inner gear, the outer peripheral surface of the outer gear is provided with a plurality of oblique gear teeth, the inner edge of the outer gear is provided with a protective ring, the wheel surfaces on both sides of the outer gear are arranged in a circular array and a plurality of lightening grooves are provided, the wheel surfaces of the outer gear are between the lightening grooves, the two sides of the lightening groove and the wheel surface form a plurality of inclined surfaces, a connecting groove is provided inside the outer gear, and connecting teeth are fixedly installed on the outer peripheral surface of the inner gear, and the connecting teeth are matched and connected with the connecting grooves.

[0007] In the above-mentioned differential gear with a lightening groove, the protection ring extends out of the inner edge of the outer gear, and the protection ring contacts the tooth surfaces on both sides of the inner gear.

[0008] In the above-mentioned differential gear with a lightening groove, the top end surface of the connecting tooth contacts the bottom end surface of the connecting groove.

[0009] In the above-mentioned differential gear with a lightening groove, the inner edge of the internal gear is provided with a chamfered surface.

[0010] In the above-mentioned differential gear with a lightening groove, through heat dissipation holes are provided on the wheel surfaces on both sides of the external gear.

[0011] Compared with the prior art, the differential gear with a lightening groove provided by the utility model has the following beneficial effects: 1. The structure is relatively simple, the connection method is relatively convenient, and the materials required for production are saved, which is suitable for mass production; 2. The structural strength is relatively large, and the stability of the connection between the outer gear and the inner gear is guaranteed through the design of the connecting teeth, the connecting grooves and the protective ring; 3. Through the setting of the inclined surface and the heat dissipation holes, the heat dissipation of the utility model is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 is a schematic diagram of the external gear structure;

[0014] Figure 3 It is a schematic diagram of the internal gear structure.

[0015] In the figure: 1, external gear; 11, oblique gear teeth; 12, wheel surface; 13, protective ring; 14, lightening groove; 15, inclined surface; 16, connecting groove; 17, heat dissipation hole; 2, internal gear; 21, connecting teeth; 22, chamfered surface. DETAILED DESCRIPTION

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0017] like Figures 1 to 3 As shown, a differential gear with a lightening groove in this embodiment includes an outer gear 1 and an inner gear 2. A connecting groove 16 is opened inside the outer gear 1. A connecting tooth 21 matching the connecting groove 16 is welded on the outer circumference of the inner gear 2. When the outer gear 1 is connected to the inner gear 2, the connecting tooth 21 extends into the connecting groove 16, and the top end surface of the connecting tooth 21 is completely fitted with the bottom end surface of the connecting groove 16. A plurality of oblique gear teeth 11 are covered on the outer circumference of the outer gear 1. The oblique gear teeth 11 enable this embodiment to be compatible with other gears. The wheels have good meshing performance and relatively stable transmission when they are matched. Ten lightening grooves 14 are arranged in a circular array on the wheel surfaces 12 on both sides of the external gear 1. The lightening grooves 14 are used to reduce the weight of the external gear 1 and reduce the production materials used in the production process of the external gear, saving production costs. Gaps are left between the lightening grooves 14 and the wheel surfaces 12. Two heat dissipation holes 17 are provided on the wheel surfaces 12 with gaps. The heat dissipation holes 17 ensure that the temperature of the embodiment itself will not be too high during operation, thereby ensuring the efficiency of the use of the embodiment.

[0018] To elaborate further, Figure 1 to Figure 2 As shown, on the wheel surfaces 12 on both sides of the external gear 1, the lightening groove 14 and the wheel surface 12 form a plurality of inclined surfaces 15, and the inclined surfaces 15 increase the surface area of ​​the external gear 1. During the use of this embodiment, the contact area between the external gear 1 and the air can be increased, thereby enhancing the heat dissipation effect of this embodiment.

[0019] To elaborate further, Figure 1 to Figure 2 As shown, a protective ring 13 is integrally formed on the inner edge of the outer gear 1, and the protective ring 13 extends from the inner edge of the outer gear 1 to the inner center of the circle. When the inner gear 2 is connected to the outer gear 1, the protective ring 13 fits with the outer edges of the end faces on both sides of the inner gear 2. The protective ring 13 ensures the stability of the connection between the outer gear 1 and the inner gear 2.

[0020] To elaborate further, Figure 1 and Figure 3 As shown, the inner edge of the internal gear 2 is formed with two chamfered surfaces 22 by cutting. The chamfered surfaces 22 can eliminate the stress of the internal gear 2 and increase the service life of this embodiment.

[0021] The working principle of the utility model is as follows: when connecting, the connecting tooth 21 is aligned with the connecting groove 16, and then the connecting tooth 21 is pushed into the connecting groove 16. When the top end surface of the connecting tooth 21 is in contact with the bottom end surface of the connecting groove 16, the assembly is completed. When the utility model is used, the inner side of the inner gear 2 is connected to the drive shaft of the differential, and the lightening groove 14 reduces the weight of the outer gear 1, thereby improving work efficiency.

[0022] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0023] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A differential gear with a lightening groove, comprising an outer gear (1) and an inner gear (2), wherein the outer gear (1) and the inner gear (2) are both annular and the outer gear (1) is sleeved on the outer side of the inner gear (2), and the outer peripheral surface of the outer gear (1) is provided with a plurality of oblique gear teeth (11), characterized in that: A protective ring (13) is provided on the inner edge of the external gear (1), a plurality of lightening grooves (14) are arranged in a ring array on the wheel surfaces (12) on both sides of the external gear (1), the wheel surfaces (12) of the external gear (1) are located between each pair of the lightening grooves (14), a plurality of inclined surfaces (15) are formed between the two sides of the lightening grooves (14) and the wheel surfaces (12), a connecting groove (16) is provided inside the external gear (1), and connecting teeth (21) are fixedly mounted on the outer peripheral surface of the internal gear (2), and the connecting teeth (21) are matched and connected with the connecting grooves (16).

2. A differential gear with a lightening groove according to claim 1, characterized in that: The protective ring (13) extends out from the inner edge of the outer gear (1), and the protective ring (13) is in contact with tooth surfaces on both sides of the inner gear (2).

3. A differential gear with a lightening groove according to claim 1, characterized in that: The top end surface of the connecting tooth (21) contacts the bottom end surface of the connecting groove (16).

4. A differential gear with a lightening groove according to claim 1, characterized in that: The inner edge of the internal gear (2) is provided with a chamfered surface (22).

5. The differential gear with a lightening groove according to claim 1, characterized in that: Through heat dissipation holes (17) are provided on the wheel surfaces (12) on both sides of the external gear (1).

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