CN222823681U

CN222823681U - A kind of automobile transmission combined with gear ring

Info

Publication number: CN222823681U
Application number: CN202421629950.6U
Authority: CN
Inventors: 张�杰; 蔡安旭; 赵江英
Original assignee: Magna PT Powertrain Jiangxi Co Ltd
Current assignee: Magna PT Powertrain Jiangxi Co Ltd
Priority date: 2024-07-10
Filing date: 2024-07-10
Publication date: 2025-05-02
Anticipated expiration: 2034-07-10

Abstract

The utility model discloses an automobile transmission combined gear ring which is characterized by comprising a ring body and a gear ring unit arranged on the ring body, wherein the ring body comprises an inner ring surface, a first side surface and a second side surface which are oppositely arranged on two sides of the inner ring surface, the first side surface and the second side surface are partially communicated, the gear ring unit is uniformly distributed on the periphery of the ring body, a buffering cambered surface is arranged at the joint of the gear ring unit and the ring body, the first side surface is a press-fit stressed surface, and a press-fit inclined surface for buffering is arranged between the first side surface and the inner ring surface. According to the utility model, a stamping spline process is adopted, and a press-fit inclined plane transition with a certain chamfer angle is arranged between the inner ring surface and the first side surface so as to solve the problem of press-fit flanging, meanwhile, no raised burrs are formed on the positioning end surface, steps are eliminated, the processing stability of the stamping arc size is ensured, and the quality of parts is improved.

Description

Automobile transmission combined gear ring

Technical Field

The utility model relates to the technical field of automobile parts, in particular to an automobile transmission combined gear ring.

Background

The automobile transmission is an important component part of an automobile, and the main function of the automobile transmission is to change the rotating speed and the torque of an engine so as to adapt to different requirements in the running process of the automobile. Among these, the ring gear is one of the key components in the transmission, the quality of which directly affects the performance and service life of the transmission.

Currently, in the manufacturing process of the gear ring, press fitting is a key link, which determines the installation accuracy and stability of the gear ring. The transmission is provided with a step designed for preventing burrs from protruding out of the positioning end surface during gear shaping on the side end surface of the combined gear ring, and a plurality of tooth tips are uniformly arranged on the periphery of the gear ring, and the step and the tooth tips are pressed to preset positions to complete assembly.

However, in actual production, the press mounting of the gear ring often has problems, such as a failure in press mounting, a flanging at a position where the inner hole chamfer of the gear ring is combined, and a scratch of the tooth tip during assembly, which can affect the quality of the gear ring.

Disclosure of utility model

Based on the problems, the utility model aims to provide an automobile transmission combined gear ring, and aims to solve the problems that the quality of the gear ring is affected by the fact that the press fitting of the gear ring is not in place, flanging exists at the inner hole chamfer of the combined gear ring and the tooth tip is scratched during assembly.

The automobile transmission combined gear ring comprises a ring body and a gear ring unit arranged on the ring body:

The ring body comprises an inner ring surface, and a first side surface and a second side surface which are oppositely arranged on two sides of the inner ring surface, wherein the first side surface is partially communicated with the second side surface;

The gear ring units are uniformly distributed on the periphery of the ring body, and a buffer cambered surface is arranged at the joint of the gear ring units and the ring body;

The first side face is a press-fit force-bearing face, and a press-fit inclined face used for buffering is arranged between the first side face and the inner ring face.

In summary, according to the automotive transmission combining gear ring provided by the utility model, the press-fitting inclined plane is arranged between the first side surface and the inner ring surface to guide the press-fitting direction, so that the flanging phenomenon is avoided, and the buffer inclined plane is arranged at the joint of the gear ring unit and the ring body to avoid scratch during engagement. Specifically, the automobile transmission combined gear ring comprises a ring body and gear ring units uniformly distributed on the periphery of the ring body. The ring body comprises an inner ring surface, and a first side surface and a second side surface which are oppositely arranged on two sides of the inner ring surface, wherein the first side surface and the second side surface are partially communicated, and a press-fit inclined surface arranged between the first side surface and the inner ring surface is utilized to guide press-fit through canceling the positioning step, so that flanging is avoided. The joint of the gear ring unit and the ring body is provided with a buffering cambered surface so as to reduce scratches generated between the gear ring units when different gear rings are meshed. According to the utility model, a stamping spline process is adopted, and a press-fit inclined plane transition with a certain chamfer angle is arranged between the inner ring surface and the first side surface so as to solve the problem of press-fit flanging, meanwhile, no raised burrs are formed on the positioning end surface, steps are eliminated, the processing stability of the stamping arc size is ensured, and the quality of parts is improved.

According to the technical scheme, the inclination angle of the press-fit inclined plane is 28-32 degrees.

According to one reverse side of the technical scheme, an included angle between the second side face and the inner ring face is 90 degrees.

According to the technical scheme, the ring body is uniformly provided with the plurality of limit grooves along the inner ring surface so as to be used for communicating the first side surface and the second side surface.

According to one reverse side of the technical scheme, adjacent gear ring units are enclosed to form a meshing space.

According to one reverse side of the above technical solution, the ring gear unit includes a tip portion facing the first side surface and an engagement portion near the second side surface, and the tip portion and the engagement portion are both obliquely overlapped with the periphery of the ring gear body.

According to the technical scheme, the buffering cambered surface comprises a first cambered surface arranged between the tip part and the periphery of the ring body and a second cambered surface arranged between the meshing part and the periphery of the ring body.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of an automotive transmission incorporating a ring gear according to an embodiment of the present utility model;

Fig. 2 is a schematic structural view of the ring gear unit;

Fig. 3 is a cross-sectional view of an automotive transmission incorporating a ring gear.

Description of the drawings element symbols:

The ring body 100, the inner ring surface 110, the first side surface 120, the second side surface 130, the press-fitting inclined surface 140, the limit groove 150, the ring gear unit 200, the tip portion 210, the engagement portion 220, the first arc surface 230, and the second arc surface 240.

Detailed Description

In order to make the objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the utility model are presented in the figures. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and the like are used herein for descriptive purposes only and not to indicate or imply that the apparatus or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

In the present utility model, unless explicitly stated or limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, there is shown a schematic structural diagram of an automotive transmission coupling ring gear provided in an embodiment of the present utility model, the automotive transmission coupling ring gear includes a ring body 100, and ring gear units 200 uniformly distributed on an outer periphery of the ring body 100, wherein:

In order to reduce the frequency of flanging in the press-fitting process, the press-fitting quality of the gear ring can be improved by improving the press-fitting process, such as adjusting press-fitting parameters, optimizing press-fitting equipment and the like, and the quality of the transmission combined with the gear ring is improved in consideration because burrs can occur in the flanging treatment process. In this embodiment, the ring body 100 includes an inner ring surface 110, and a first side surface 120 and a second side surface 130 opposite to the inner ring surface 110, wherein the first side surface 120 is used for being a press-fit force surface.

In order to improve the press-fitting effect and reduce the possibility of flanging during the press-fitting process, a press-fitting inclined surface 140 for buffering is provided between the first side surface 120 and the inner ring surface 110. The angle range of the press-fit inclined plane 140 presented with the horizontal direction is 28 degrees to 32 degrees, and the arrangement of the inclined angle can effectively improve the press-fit effect of the gear ring in the press-fit process. Due to the design of the press-fit inclined plane 140, the press-fit inclined plane 140 can also play a guiding role in the press-fit process, so that the gear ring can be aligned to the pre-press-fit position conveniently, and the problems of flanging or scratching and the like caused by offset are avoided.

Since the first side 120 is a press-fit force-bearing surface, no press-fit inclined surface 140 exists between the second side 130 and the inner ring surface 110, and an included angle between the second side 130 and the inner ring surface 110 is 90 degrees, so that limitation on parts to be press-fitted is avoided.

Further, since the step is disposed on the section of the previous gear ring, in the press mounting process, the flanging burrs are generated when the tooth side and the tooth root are removed, and the feeding amount cannot be precisely controlled, so that the circular arc of the stamping forming of the gear ring is unstable in size and easy to generate out-of-tolerance, the step is cancelled, the stamping forming spline is adopted, and meanwhile, a plurality of limit grooves 150 are uniformly arranged along the inner ring surface 110 at the ring body 100 so as to be used for communicating the first side surface 120 and the second side surface 130.

Furthermore, a plurality of gear ring units 200 are uniformly distributed on the periphery of the ring body 100, so as to form a gear ring, and a buffer cambered surface is arranged at the connection position of the gear ring units 200 and the ring body 100. Adjacent gear ring units 200 enclose a meshing space therebetween for meshing with other gear rings. The tooth engaging unit includes a tip portion 210 facing the first side 120 and an engaging portion 220 adjacent to the second side 130, and the tip portion 210 and the engaging portion 220 are disposed to be obliquely overlapped with the outer circumference of the ring body 100.

In order to reduce the scratch of the ring gear unit 200 during the engagement, the buffer cambered surface includes a first cambered surface 230 provided between the tip end portion 210 and the outer periphery of the ring body 100, and a second cambered surface 240 provided between the engagement portion 220 and the outer periphery of the ring body 100. Adjacent ring gear units 200 can be sequentially inserted through the engagement space, and the obliquely arranged tip portions 210 and engagement portions 220 also provide a good guiding effect during engagement.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing examples illustrate only a few embodiments of the utility model, and are described in detail, but are not to be construed as limiting the scope of the utility model. It should be noted that it is possible for those skilled in the art to make several variations and modifications without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The automobile transmission combined gear ring is characterized by comprising a ring body and a gear ring unit arranged on the ring body:

2. The automotive transmission combination ring gear of claim 1 wherein said press-fit bevel has an inclination angle in the range of 28 ° -32 °.

3. The automotive transmission combination ring gear of claim 2 wherein the angle between the second side face and the inner race face is 90 °.

4. The automotive transmission-coupling ring gear according to claim 3, wherein the ring body is provided with a plurality of limit grooves uniformly arranged along the inner ring surface for communicating the first side surface and the second side surface.

5. The automotive transmission-coupling ring gear of claim 1, wherein a meshing space is defined between adjacent ones of the ring gear units.

6. The automotive transmission-coupling ring gear according to claim 5, characterized in that the ring gear unit includes a tip portion facing the first side face and an engagement portion near the second side face, both of which are disposed obliquely overlapping with the ring body outer periphery.

7. The automotive transmission-coupling ring gear according to claim 6, characterized in that the buffer cambered surface includes a first cambered surface provided between the tip portion and a ring body outer periphery, and a second cambered surface provided between the engagement portion and a ring body outer periphery.