CN216343777U - Automobile transmission gear forging - Google Patents
Automobile transmission gear forging Download PDFInfo
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- CN216343777U CN216343777U CN202122582516.XU CN202122582516U CN216343777U CN 216343777 U CN216343777 U CN 216343777U CN 202122582516 U CN202122582516 U CN 202122582516U CN 216343777 U CN216343777 U CN 216343777U
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- side wall
- gear
- forging
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Abstract
The utility model discloses an automobile transmission gear forging, which comprises a gear body; one side of the gear body is in an opening shape, the other side of the gear body is provided with a step-shaped protruding part, and a through groove is formed between the center of the protruding part and the opening; the through groove comprises a first groove, a second groove, a third groove and a fourth groove which are sequentially arranged from an opening end to a bulge end, and the first groove, the second groove, the third groove and the fourth groove are coaxial and concentric; the second groove is of a stepped structure and comprises three layers of stepped concave parts. According to the utility model, by adopting the through groove and the step-shaped protruding part, the overall shape and structure of the gear body are optimized, the cutting amount in subsequent processing is reduced, the self-damage of the gear body in subsequent processing can be reduced, the self-weight of the optimized gear body can be reduced, the structural strength is increased, and the service life of the gear body is prolonged.
Description
Technical Field
The utility model relates to the technical field of gears, in particular to a gear forging of an automobile gearbox.
Background
The gear is the most important transmission part in the automobile gearbox, and the transmission ratio and the movement direction of the gearbox can be changed through the mutual meshing transmission among different gears, so that the vehicle can be switched into various modes in the running process. The existing gear can be subjected to a large amount of allowance cutting due to the shape of the gear during machining, so that a machining material is damaged in the cutting process, the structural strength and the service life of the gear cannot be ensured, and the tightness of the assembled gear and a rotating shaft cannot be ensured.
The automobile transmission gear forging piece is characterized in that the through groove and the protruding portion are arranged on the outer side of the gear body, the inner side of the through groove is provided with a through hole, the through hole is formed in the outer side of the through groove, the protruding portion is provided with a through hole, the inner side of the through hole is provided with a through hole, the through hole is formed in the through hole, the through hole is communicated with the through hole, the through hole is formed in the through hole, the through hole is communicated with the through hole, the through hole is formed in the through hole.
Disclosure of Invention
The utility model aims to provide a gear forging of an automobile gearbox, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the solution of the utility model is: an automobile gearbox gear forging comprises a gear body; one side of the gear body is in an opening shape, the other side of the gear body is provided with a step-shaped protruding part, and a through groove is formed between the center of the protruding part and the opening; the through groove comprises a first groove, a second groove, a third groove and a fourth groove which are sequentially arranged from an opening end to a bulge end, and the first groove, the second groove, the third groove and the fourth groove are coaxial and concentric; the second groove is of a stepped structure, the groove width of one side, close to the first groove, of the second groove is larger than that of one side, close to the third groove, of the second groove, and the second groove comprises three layers of stepped concave parts, so that the bottom end of each layer of concave part is equal to the bottom distance of the corresponding convex part.
Further, the gear body is machined through a precision forging process.
Further, the included angle between the side wall of the gear body and the bottom end of the gear body is 86 degrees.
Further, in the stepped recess of the second groove, the inclination angles of the side walls of the upper and lower layers of recesses are greater than the inclination angle of the side wall of the middle recess.
Furthermore, an included angle between the side wall of the concave part at the upper layer of the second groove and the bottom surface of the concave part is 140-155 degrees; the included angle between the side wall of the middle concave part of the second groove and the bottom surface thereof is 120-135 degrees; the included angle between the side wall of the lower-layer concave part of the second groove and the bottom surface of the lower-layer concave part of the second groove is 145-155 degrees.
Further, in the stepped recess of the second groove, the joint of two adjacent layers of recesses is provided with an arc-shaped chamfer with the radius of 2 mm.
Furthermore, the through groove also comprises an annular groove which is arranged in the first groove and positioned on the outer side of the upper end of the second groove; the joint of the annular groove and the inner side wall of the gear body is an arc-shaped surface, and the joint of the annular groove and the bottom surface of the first groove is an inclined surface; the included angle between the inclined plane of the annular groove and the bottom surface of the first groove is 30 degrees.
Compared with the prior art, the utility model has the beneficial effects that:
(1) according to the gear body, the through groove and the step-shaped protruding part are adopted, so that the overall shape and structure of the gear body are optimized, the cutting amount in subsequent processing is reduced, the damage of the gear body in subsequent processing can be reduced, the weight of the optimized gear body can be reduced, the structural strength is improved, and the service life of the gear body is prolonged; compared with the traditional gear, the gear body with the convex part is more beneficial to positioning assembly and axial compression with the rotating shaft, the convenience of assembly of the gear body is improved, and the tightness of connection between the gear body and the rotating shaft is ensured;
(2) the second groove formed by the stepped concave part has good guidance, so that the gear body can be accurately guided and positioned with an auxiliary instrument when being axially compressed with the rotating shaft, and the tightness of the axial compression of the gear body and the rotating shaft is ensured.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic front view of the present invention;
fig. 3 is a schematic cross-sectional structure of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
The first embodiment is as follows:
as shown in fig. 1-3, an automobile transmission gear forging comprises a gear body 1; one side of the gear body 1 is in an opening shape, the other side of the gear body is provided with a step-shaped protruding part 12, and a through groove 11 is arranged between the center of the protruding part 12 and the opening; the through groove 11 comprises a first groove 111, a second groove 112, a third groove 113 and a fourth groove 114 which are sequentially arranged from the opening end to the end of the convex part 12, and the first groove 111, the second groove 112, the third groove 113 and the fourth groove 114 are coaxial and concentric; the second groove 112 is in a stepped structure, the groove width of the second groove 112 close to the first groove 111 is larger than the groove width of the second groove 112 close to the third groove 113, the second groove 112 comprises three layers of stepped concave parts, and the distances between the bottom ends of the concave parts of each layer and the bottoms of the corresponding convex parts 12 are equal; wherein, the inner wall of the third groove 113 is inclined from one end of the second groove 112 to one end of the fourth groove 114; the through groove 11 and the protruding part 12 can optimize the overall shape and structure of the gear body 1, reduce the cutting amount in subsequent processing, reduce the self-damage of the gear body 1 in subsequent processing, reduce the self-weight of the optimized gear body 1, increase the structural strength and prolong the service life of the gear body 1; compared with the traditional gear, the gear body 1 with the convex part 12 is more beneficial to positioning assembly and axial compression with a rotating shaft, the convenience of assembly of the gear body 1 is improved, and the tightness of connection between the gear body 1 and the rotating shaft is ensured;
in the embodiment, the gear body 1 is machined by a precision forging process; the gear body 1 machined by the precision forging process has a good structural shape, so that the cutting allowance of the gear body 1 in the later machining can be reduced, and the surface of the gear body 1 is prevented from being abraded by the later machining;
in this embodiment, an included angle between the side wall of the gear body 1 and the bottom end of the gear body 1 is 86 degrees; the gear body 1 with the side wall having a certain angle can obtain a replaced transmission ratio after being processed, so that the transmission precision is improved;
as shown in fig. 1 to 3, in the present embodiment, in the stepped recess of the second groove 112, the inclination angle of the side wall of the upper and lower layers of recess is greater than that of the side wall of the middle recess; in this embodiment, an included angle between the sidewall of the upper recess of the second groove 112 and the bottom surface thereof is 140 ° to 155 °; the included angle between the side wall of the middle concave part of the second groove 112 and the bottom surface thereof is 120-135 degrees; the included angle between the side wall of the lower-layer concave part of the second groove 112 and the bottom surface thereof is 145-155 degrees; in this embodiment, in the stepped recesses of the second groove 112, the joints of two adjacent recesses are both provided with arc chamfers, and the radius of each arc chamfer is 2 mm; an included angle between the side wall of the upper-layer recessed portion of the second groove 112 and the bottom surface of the upper-layer recessed portion is preferably 145 degrees, an included angle between the side wall of the middle recessed portion of the second groove 112 and the bottom surface of the middle recessed portion of the second groove 112 is preferably 130 degrees, an included angle between the side wall of the lower-layer recessed portion of the second groove 112 and the bottom surface of the lower-layer recessed portion of the second groove 112 is preferably 147 degrees, the second groove 112 is formed by stepped recessed portions with different included angles, and good guiding performance is achieved, so that the gear body 1 can be accurately guided and positioned with an auxiliary instrument when being axially compressed with a rotating shaft, and the axial compression tightness between the gear body 1 and the rotating shaft is ensured;
as shown in fig. 3, in the present embodiment, the through slot 11 further includes an annular slot 115 disposed inside the first slot 111 and outside the upper end of the second slot 112; the joint of the annular groove 115 and the inner side wall of the gear body 1 is an arc-shaped surface, and the joint of the annular groove 115 and the bottom surface of the first groove 111 is an inclined surface; the included angle between the inclined plane of the annular groove 115 and the bottom surface of the first groove 111 is 30 degrees; the annular groove 115 can further reduce the size of the gear body 1, so that the lubricating oil has a certain space flow, the lubricating oil can be ensured to fully lubricate the gear body 1, the abrasion of the gear body 1 is reduced, the service life is prolonged, and the noise generated in the transmission process of the gear body 1 is avoided;
in the embodiment, other corners of the gear body 1 are subjected to fillet treatment, the radius of the fillet is 2 mm-4 mm, preferably 2mm, so that the gear body 1 is ensured to have good roundness, and the influence on the use of the gear body 1 caused by burrs generated at the corners of the gear body is avoided;
in summary, the through groove 11 and the protruding part 12 are adopted, so that the overall shape and structure of the gear body 1 are optimized, the cutting amount in subsequent processing is reduced, the gear body 1 can be damaged in subsequent processing, the optimized gear body 1 can reduce the weight, increase the structural strength and prolong the service life of the gear body 1; and the gear body 1 with the convex part 12 is more beneficial to positioning assembly and axial compression with the rotating shaft compared with the traditional gear, the convenience of assembling the gear body 1 is improved, and the tightness of the connection of the gear body 1 and the rotating shaft is ensured.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. An automobile gearbox gear forging comprises a gear body (1); the method is characterized in that: one side of the gear body (1) is open, a step-shaped bulge (12) is arranged on the other side of the gear body, and a through groove (11) is arranged between the center of the bulge (12) and the opening; the through groove (11) comprises a first groove (111), a second groove (112), a third groove (113) and a fourth groove (114) which are sequentially arranged from an opening end to a protruding part (12), and the first groove (111), the second groove (112), the third groove (113) and the fourth groove (114) are coaxial and concentric; the second groove (112) is of a stepped structure, the groove width of one side, close to the first groove (111), of the second groove (112) is larger than the groove width of one side, close to the third groove (113), of the second groove (112), the second groove (112) comprises three layers of stepped concave parts, and the distances between the bottom ends of the concave parts at each layer are equal to the distances between the bottoms of the corresponding convex parts (12).
2. The automobile transmission gear forging of claim 1, wherein: the gear body (1) is machined through a precision forging process.
3. The automobile transmission gear forging of claim 1, wherein: the included angle between the side wall of the gear body (1) and the bottom end of the gear body (1) is 86 degrees.
4. The automobile transmission gear forging of claim 1, wherein: in the stepped concave part of the second groove (112), the inclination angles of the side walls of the upper and lower layers of concave parts are larger than that of the side wall of the middle concave part.
5. The automobile transmission gear forging of claim 4, wherein: the included angle between the side wall of the upper-layer concave part of the second groove (112) and the bottom surface thereof is 140-155 degrees; the included angle between the side wall of the middle concave part of the second groove (112) and the bottom surface thereof is 120-135 degrees; the included angle between the side wall of the lower-layer concave part of the second groove (112) and the bottom surface is 145-155 degrees.
6. The automobile transmission gear forging of claim 4, wherein: in the stepped concave part of the second groove (112), the joint of two adjacent layers of concave parts is provided with an arc chamfer with the radius of 2 mm.
7. The automobile transmission gear forging as recited in any of claims 1-6, wherein: the through groove (11) further comprises an annular groove (115) which is arranged inside the first groove (111) and positioned outside the upper end of the second groove (112); the joint of the annular groove (115) and the inner side wall of the gear body (1) is an arc-shaped surface, and the joint of the annular groove (115) and the bottom surface of the first groove (111) is an inclined surface; the included angle between the inclined plane of the annular groove (115) and the bottom surface of the first groove (111) is 30 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122582516.XU CN216343777U (en) | 2021-10-26 | 2021-10-26 | Automobile transmission gear forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122582516.XU CN216343777U (en) | 2021-10-26 | 2021-10-26 | Automobile transmission gear forging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216343777U true CN216343777U (en) | 2022-04-19 |
Family
ID=81180476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122582516.XU Active CN216343777U (en) | 2021-10-26 | 2021-10-26 | Automobile transmission gear forging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216343777U (en) |
-
2021
- 2021-10-26 CN CN202122582516.XU patent/CN216343777U/en active Active
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