Combined gear ring of automobile transmission

Abstract

The utility model discloses an automobile transmission combination gear ring which is characterized in that the automobile transmission combination gear ring comprises a ring body and a gear ring unit arranged on the ring body, the ring body comprises an inner ring face, a first side face and a second side face, the first side face and the second side face are oppositely arranged on the two sides of the inner ring face, and the first side face and the second side face are partially communicated; the gear ring units are evenly distributed on the periphery of the ring body, and buffering arc faces are arranged at the joints of the gear ring units and the ring body. The first side face is a press-fitting stress face, and a press-fitting inclined face used for buffering is arranged between the first side face and the inner ring face. According to the utility model, the press-fitting inclined surface with a certain chamfer angle is arranged between the inner ring surface and the first side surface for transition by adopting a punch forming spline process, so that the problem of press-fitting flanging is solved, meanwhile, convex burrs are not formed on a positioning end surface, steps are eliminated, the machining stability of the punch forming arc size is ensured, and the quality of parts is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an automobile transmission combined with a gear ring. Background Art

[0002] The automobile transmission is an important part of the automobile. Its main function is to change the engine speed and torque to meet the different needs of the car during driving. Among them, the ring gear is one of the key components in the transmission, and its quality directly affects the performance and service life of the transmission.

[0003] At present, 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 side end face of the gear ring is provided with a step designed to prevent burrs from protruding from the positioning end face during gear shaping, and multiple tooth tips are evenly arranged on the outer circumference of the gear ring. The assembly is completed by pressing the step and the tooth tip to the preset position.

[0004] However, in actual production, there are often some problems in the press-fitting of the gear ring, such as inadequate press-fitting, flanges at the chamfers of the inner hole of the gear ring, and scratches on the tip of the tooth during assembly, all of which will affect the quality of the gear ring. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide an automobile transmission combined gear ring, aiming to solve the current problems of the gear ring not being pressed into place, the presence of flanging at the chamfer of the inner hole of the combined gear ring, and scratches on the tip of the tooth during assembly, all of which affect the quality of the gear ring.

[0006] To achieve the above object, the utility model is implemented through the following technical solutions: an automobile transmission combined with a gear ring, the automobile transmission combined with a gear ring comprising a ring body and a gear ring unit arranged on the ring body:

[0007] The ring body comprises an inner ring surface, and a first side surface and a second side surface which are arranged opposite to each other on both sides of the inner ring surface, wherein the first side surface and the second side surface are partially connected;

[0008] The gear ring units are evenly distributed on the outer circumference of the ring body, and a buffer arc surface is provided at the connection between the gear ring units and the ring body;

[0009] Wherein, the first side surface is a press-fitting stress-bearing surface, and a press-fitting inclined surface for buffering is provided between the first side surface and the inner ring surface.

[0010] In summary, according to the utility model, a kind of automobile transmission combined with gear ring proposed, by setting a press-fitting inclined surface between the first side surface and the inner ring surface, to guide the press-fitting direction to avoid flanging, and a buffer inclined surface is provided at the connection between the gear ring unit and the ring body to avoid scratches during meshing. Specifically, the automobile transmission combined with gear ring includes a ring body and gear ring units evenly distributed on the outer periphery of the ring body. The ring body includes an inner ring surface, and a first side surface and a second side surface relatively arranged on both sides of the inner ring surface, and the first side surface and the second side surface are partially connected. By eliminating the positioning step and using the press-fitting inclined surface set between the first side surface and the inner ring surface, the press-fitting is guided to avoid flanging. A buffer arc surface is provided at the connection between the gear ring unit and the ring body to reduce scratches between the gear ring units when different gear rings are meshed. The utility model adopts a stamping spline process to set a press-fitting inclined surface transition with a certain chamfer angle between the inner ring surface and the first side surface to improve the problem of press-fitting flanging. At the same time, no raised burrs are formed on the positioning end surface, the step is eliminated, the processing stability of the stamping arc size is guaranteed, and the quality of parts is improved.

[0011] According to one aspect of the above technical solution, the inclination angle of the press-fitting slope ranges from 28° to 32°.

[0012] According to a reverse side of the above technical solution, the angle between the second side surface and the inner ring surface is 90°.

[0013] According to an opposite aspect of the above technical solution, the ring body is provided with a plurality of limiting grooves evenly arranged along the inner ring surface, so as to connect the first side surface and the second side surface.

[0014] According to an opposite aspect of the above technical solution, adjacent gear ring units enclose a meshing space.

[0015] According to an opposite aspect of the above technical solution, the gear ring unit includes a tip portion facing the first side surface and a meshing portion close to the second side surface, and both the tip portion and the meshing portion are arranged to overlap obliquely with the outer periphery of the ring body.

[0016] According to an opposite aspect of the above technical solution, the buffer arc surface includes a first arc surface provided between the tip portion and the outer periphery of the ring body, and a second arc surface provided between the meshing portion and the outer periphery of the ring body.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of an automobile transmission combined with a gear ring in one embodiment of the utility model;

[0020] Figure 2 is a structural schematic diagram of the ring gear unit;

[0021] Figure 3 This is a cross-sectional view of the automobile transmission combined with the ring gear.

[0022] Component symbol description:

[0023] Ring body 100 , inner ring surface 110 , first side surface 120 , second side surface 130 , press-fitting inclined surface 140 , limiting groove 150 , gear ring unit 200 , tip portion 210 , meshing portion 220 , first arc surface 230 , second arc surface 240 . DETAILED DESCRIPTION

[0024] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. Several embodiments of the utility model are given in the accompanying drawings. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] See also Figure 1-Figure 3, which is a schematic structural diagram of an automobile transmission combined with a gear ring provided in an embodiment of the utility model, wherein the automobile transmission combined with a gear ring comprises a ring body 100 and gear ring units 200 evenly distributed on the outer periphery of the ring body 100, wherein:

[0028] In order to reduce the frequency of flanging during the press-fitting process, the press-fitting quality of the gear ring can be improved by improving the press-fitting process, such as adjusting the press-fitting parameters, optimizing the press-fitting equipment, etc. Since burrs will appear during the flanging process, improving the quality of the gear ring combined with the transmission is also within the scope of consideration. 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 arranged on both sides of the inner ring surface 110, wherein the first side surface 120 is used as a press-fitting force surface.

[0029] 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 of the press-fitting inclined surface 140 with respect to the horizontal direction is in the range of 28°-32°, and the setting of the inclined angle can effectively improve the press-fitting effect of the gear ring during the press-fitting process. And due to the design of the press-fitting inclined surface 140, during the press-fitting process, the press-fitting inclined surface 140 can also play a guiding role, facilitating the gear ring to align with the pre-pressing position, avoiding deviation, and causing flanging or scratches.

[0030] Since the first side surface 120 is a press-fitting stress-bearing surface, there is no press-fitting inclined surface 140 between the second side surface 130 and the inner ring surface 110 , and the angle between the second side surface 130 and the inner ring surface 110 is 90° to avoid restrictions on the parts to be press-fitted.

[0031] Furthermore, since the previous gear ring had a step on its cross section, flanging burrs were generated on the tooth sides and tooth roots during the press-fitting process. Since the feed rate could not be accurately controlled during burr removal, the size of the stamped arc of the gear ring was unstable and prone to out-of-tolerance problems. Therefore, the step was removed and a stamped spline was used instead. At the same time, a plurality of limit grooves 150 were evenly arranged along the inner ring surface 110 of the ring body 100 to connect the first side surface 120 and the second side surface 130.

[0032] Furthermore, a plurality of gear ring units 200 are evenly distributed on the outer periphery of the ring body 100 to form a gear ring, and a buffer arc surface is provided at the connection between the gear ring unit 200 and the ring body 100. A meshing space is enclosed between adjacent gear ring units 200 for meshing with other gear rings. The meshing unit includes a tip portion 210 facing the first side surface 120 and a meshing portion 220 close to the second side surface 130, and the tip portion 210 and the meshing portion 220 are both arranged to overlap with the outer periphery of the ring body 100 in an inclined manner.

[0033] In order to reduce the scratches on the gear ring unit 200 during the meshing process, the buffer arc surface includes a first arc surface 230 provided between the tip portion 210 and the outer periphery of the ring body 100, and a second arc surface 240 provided between the meshing portion 220 and the outer periphery of the ring body 100. Adjacent gear ring units 200 can be sequentially embedded through the meshing space, and the inclined tip portion 210 and the meshing portion 220 also provide a good guiding effect during the meshing process.

[0034] In summary, according to the utility model, a kind of automobile transmission combined with gear ring proposed, by setting a press-fitting inclined surface between the first side surface and the inner ring surface, to guide the press-fitting direction to avoid flanging, and a buffer inclined surface is provided at the connection between the gear ring unit and the ring body to avoid scratches during meshing. Specifically, the automobile transmission combined with gear ring includes a ring body and gear ring units evenly distributed on the outer periphery of the ring body. The ring body includes an inner ring surface, and a first side surface and a second side surface relatively arranged on both sides of the inner ring surface, and the first side surface and the second side surface are partially connected. By eliminating the positioning step and using the press-fitting inclined surface set between the first side surface and the inner ring surface, the press-fitting is guided to avoid flanging. A buffer arc surface is provided at the connection between the gear ring unit and the ring body to reduce scratches between the gear ring units when different gear rings are meshed. The utility model adopts a stamping spline process to set a press-fitting inclined surface transition with a certain chamfer angle between the inner ring surface and the first side surface to improve the problem of press-fitting flanging. At the same time, no raised burrs are formed on the positioning end surface, the step is eliminated, the processing stability of the stamping arc size is guaranteed, and the quality of parts is improved.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An automobile transmission combined with a ring gear, characterized in that: The automobile transmission combined with the ring gear comprises a ring body and a ring gear 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 arranged opposite to each other on both sides of the inner ring surface, wherein the first side surface and the second side surface are partially connected; The gear ring units are evenly distributed on the outer circumference of the ring body, and a buffer arc surface is provided at the connection between the gear ring units and the ring body; Wherein, the first side surface is a press-fitting stress-bearing surface, and a press-fitting inclined surface for buffering is provided between the first side surface and the inner ring surface.

2. The automobile transmission combined with a ring gear according to claim 1, characterized in that: The inclination angle of the press-fitting slope ranges from 28° to 32°.

3. The automobile transmission combined with a ring gear according to claim 2, characterized in that: The included angle between the second side surface and the inner ring surface is 90°.

4. The automobile transmission combined with a ring gear according to claim 3, characterized in that: The ring body is evenly arranged with a plurality of limiting grooves along the inner ring surface to connect the first side surface and the second side surface.

5. The automobile transmission combined with a ring gear according to claim 1, characterized in that: Adjacent gear ring units enclose a meshing space.

6. The automobile transmission combined with a ring gear according to claim 5, characterized in that: The gear ring unit comprises a tip portion facing the first side surface and a meshing portion close to the second side surface, and both the tip portion and the meshing portion are arranged in an oblique overlapping manner with the outer periphery of the ring body.

7. The automobile transmission combined with a ring gear according to claim 6, characterized in that: The buffer arc surface includes a first arc surface provided between the tip portion and the outer periphery of the ring body, and a second arc surface provided between the meshing portion and the outer periphery of the ring body.

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