CN215830992U - Novel lightweight structure of transmission shaft universal joint fork forging - Google Patents
Novel lightweight structure of transmission shaft universal joint fork forging Download PDFInfo
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- CN215830992U CN215830992U CN202121274942.0U CN202121274942U CN215830992U CN 215830992 U CN215830992 U CN 215830992U CN 202121274942 U CN202121274942 U CN 202121274942U CN 215830992 U CN215830992 U CN 215830992U
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Abstract
Novel structure of transmission shaft universal joint fork forging lightweight, including connecting hub and two fork ears that bilateral symmetry set up, be equipped with the splice bar that is located the connecting hub top between two fork ears, be equipped with the open inner nest in bottom between tip and the splice bar under the connecting hub, the top of inner nest is equipped with a deep slot along the left and right sides direction, and the profile of deep slot and inner nest along the perpendicular of left and right sides direction is the isosceles trapezoid of width under the upper narrow, circular arc transition between isosceles trapezoid's the upper base both ends and two waists. The utility model has the following technical effects: the inner nest structure of the universal joint fork forging piece is optimized, the connecting hub at the bottom of the universal joint fork forging piece is easier to form, black skin is avoided, forming pressure is reduced, damage to forging equipment is avoided, cost is greatly reduced, and production efficiency is improved.
Description
Technical Field
The utility model belongs to the field of automobile part manufacturing, and particularly relates to a novel lightweight structure of a transmission shaft universal joint fork forging.
Background
The existing transmission shaft universal joint fork forging is shown in figures 1, 2 and 3, and comprises a connecting hub 1 and two fork lugs 2 which are arranged in bilateral symmetry, a connecting rib 3 which is arranged above the connecting hub 1 is arranged between the two fork lugs 2, and an inner socket 4 with an open bottom is arranged between the lower end of the connecting hub 1 and the connecting rib 3. The universal joint fork forging piece with the structure has the following problems:
1) the contour of the inner socket 4 is shaped as a curved surface formed by the section line C in fig. 2 to rotate around the center line of the connecting hub 1. During the forging process, the material flows from top to bottom, and the metal material can flow into the bottom of the die cavity (the lower circumference of the connecting hub 1) more only after the die cavity at D is full. But this impedes the flow of metal to the bottom of the mold cavity due to the large amount of material required at D. The phenomenon that the bottom of a die cavity is not sufficiently filled and the circumference of the lower part of the connecting hub 1 is black easily occurs in production, so that the rejection rate is increased;
2) to completely fill the bottom of the universal joint yoke forging die cavity, the forming pressure is increased or the total weight of the blank is increased. The local stress of the die is increased by the excessive forging forming pressure or the sharp increase of the pressure in the final forming stage. The local stress of the die is increased, cracks are easy to appear, repeated repair is needed by workers, and the service life of the finish forging die is shortened. Increasing the total weight of the blank will result in excessive flash, reducing the material utilization. The forming pressure is high, so that the forging equipment is easy to be blocked, and the risk of damage of the forging equipment is increased;
3) still will carry out the metalworking after forging the shaping to the universal joint fork, connect hub 1 needs and transmission shaft pipe coaxial bonding, for the discharge of production gas when the convenience is welded, need the exhaust hole of processing and interior nest 4 intercommunication in the center department of splice bar 3, but 3 wall thicknesses of splice bar are thicker, and the processing exhaust hole degree of difficulty increases, has also increased the weight of universal joint fork forging simultaneously, and the cost is corresponding increase also.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a novel lightweight structure of a transmission shaft universal joint fork forging piece, which reduces the pre-forging forming pressure, can quickly and effectively fill the bottom of a die cavity during forging, prolongs the service life of the die, has light weight and improves the machining efficiency.
In order to solve the technical problems, the utility model adopts the following technical scheme: novel structure of transmission shaft universal joint fork forging lightweight, including connecting hub and two fork ears that bilateral symmetry set up, be equipped with the splice bar that is located the connecting hub top between two fork ears, be equipped with the open inner nest in bottom between tip and the splice bar under the connecting hub, the top of inner nest is equipped with a deep slot along the left and right sides direction, and the profile of deep slot and inner nest along the perpendicular of left and right sides direction is the isosceles trapezoid of width under the upper narrow, circular arc transition between isosceles trapezoid's the upper base both ends and two waists.
The front side surface and the rear side surface of the deep long groove respectively extend downwards to the upper end of the inner circle of the connecting hub, and the outline shape of the upper part of the connecting hub is consistent with that of the upper part of the connecting hub.
The thickness of the connecting rib is equal at any position of the inner wall of the deep and long groove and the inner nest.
By adopting the technical scheme, the utility model has the following technical effects:
1) the material flow and the stress concentration point during the forging and forming of the universal joint fork forging are analyzed through numerical simulation, the inner nest structure of the universal joint fork forging is optimized, the connecting hub at the bottom of the universal joint fork forging is easier to form, black skin is avoided, the forming pressure is reduced, and the damage of forging equipment is avoided;
2) the deep elongated grooves are arranged on the top of the inner socket along the left-right direction, and the connecting ribs are equal to the deep elongated grooves and the inner wall of the inner socket at any positions, so that the improved universal joint fork forging can reduce the weight by about 1kg, the labor intensity of workers is reduced to a certain extent, and the forming is easier because the material flows to the bottom of the forging more easily. The forming rate and the material utilization rate of the forge piece are improved, and the manufacturing cost is reduced. The requirements of high strength, low cost and easy forming of the forged piece can be met under the condition of achieving the requirement of light weight;
3) the thickness of the connecting rib is reduced, and the exhaust hole is easy to process; meanwhile, the improved inner nest structure improves the problem of stress concentration, reduces the possibility of cracking of a forging die, increases the service life of the forging die from 5000 pieces to 10000 pieces in the prior art through tests, doubles the service life of the forging die, greatly reduces the cost and improves the production efficiency.
Drawings
FIG. 1 is a schematic plan view of a prior art driveshaft yoke forging;
FIG. 2 is a side semi-sectional view of FIG. 1;
FIG. 3 is a schematic perspective view of a prior art universal joint yoke forging;
FIG. 4 is a schematic plan view of the present invention;
FIG. 5 is a side semi-sectional view of FIG. 4;
fig. 6 is a schematic perspective view of the present invention.
Detailed Description
As shown in fig. 4, 5 and 6, the novel lightweight structure of the universal joint fork forging of the transmission shaft comprises a connecting hub 1 and two fork lugs 2 which are arranged in bilateral symmetry, a connecting rib 3 which is positioned above the connecting hub 1 is arranged between the two fork lugs 2, an inner socket 4 with an open bottom is arranged between the lower end part of the connecting hub 1 and the connecting rib 3, a deep long groove 5 is arranged at the top of the inner socket 4 along the left-right direction, the outline of a vertical plane of the deep long groove 5 and the inner socket 4 along the left-right direction is an isosceles trapezoid with a narrow upper part and a wide lower part, and two ends of the upper bottom of the isosceles trapezoid are in circular arc transition with two waists.
The front side and the rear side of the deep slot 5 respectively extend downwards to the upper end of the inner circle of the connecting hub 1, and the outline shape of the upper part of the connecting hub 1 is consistent with that of the upper part of the connecting hub 1.
The thickness of the connecting rib 3 is equal at any position of the inner walls of the deep and long groove 5 and the inner socket 4.
As shown in fig. 4 and 5, the structure of the deep and long groove 5 and the inner wall of the inner socket 4 may be formed by joining and enclosing a rotation curved surface of a curve a which is symmetrical left and right and an inward stretching curved surface of a curve B which is symmetrical front and back.
The utility model has the following technical effects:
1) the material flow and the stress concentration point during the forging and forming of the universal joint fork forging are analyzed through numerical simulation, the structure of the inner socket 4 of the universal joint fork forging is optimized, the connecting hub 1 at the bottom of the universal joint fork forging is easier to form, black skin is avoided, the forming pressure is reduced, and the damage of forging equipment is avoided;
2) the deep and long groove 5 is arranged on the top of the inner socket 4 along the left-right direction, and the connecting ribs 3 are equal to any position of the inner walls of the deep and long groove 5 and the inner socket 4, so that the weight of the improved universal joint fork forging can be reduced by about 1kg, the labor intensity of workers is reduced to a certain extent, and the forming is easier because the material flows to the bottom of the forging more easily. The forming rate and the material utilization rate of the forge piece are improved, and the manufacturing cost is reduced. The requirements of high strength, low cost and easy forming of the forged piece can be met under the condition of achieving the requirement of light weight;
3) the thickness of the connecting rib 3 is reduced, and the vent hole is easy to process; meanwhile, the improved structure of the inner socket 4 improves the problem of stress concentration, reduces the possibility of cracking of a forging die, increases the service life of the forging die from 5000 pieces to 10000 pieces in the prior art through tests, doubles the service life of the forging die, greatly reduces the cost and improves the production efficiency.
Claims (3)
1. Novel structure of transmission shaft universal joint fork forging lightweight, including connecting two fork ears that hub and bilateral symmetry set up, be equipped with the splice bar that is located the connection hub top between two fork ears, be equipped with the open inner nest in bottom, its characterized in that under the connection hub between tip and the splice bar: the top of the inner nest is provided with a deep elongated slot along the left-right direction, the profiles of the vertical planes of the deep elongated slot and the inner nest along the left-right direction are isosceles trapezoids with narrow tops and wide bottoms, and the two ends of the upper bottom of each isosceles trapezoid are in arc transition with the two waists.
2. The novel lightweight structure of the transmission shaft universal joint fork forging according to claim 1, characterized in that: the front side surface and the rear side surface of the deep long groove respectively extend downwards to the upper end of the inner circle of the connecting hub, and the outline shape of the upper part of the connecting hub is consistent with that of the upper part of the connecting hub.
3. The novel lightweight structure of the transmission shaft universal joint fork forging according to claim 2, characterized in that: the thickness of the connecting rib is equal at any position of the inner wall of the deep and long groove and the inner nest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121274942.0U CN215830992U (en) | 2021-06-08 | 2021-06-08 | Novel lightweight structure of transmission shaft universal joint fork forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121274942.0U CN215830992U (en) | 2021-06-08 | 2021-06-08 | Novel lightweight structure of transmission shaft universal joint fork forging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215830992U true CN215830992U (en) | 2022-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121274942.0U Active CN215830992U (en) | 2021-06-08 | 2021-06-08 | Novel lightweight structure of transmission shaft universal joint fork forging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215830992U (en) |
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2021
- 2021-06-08 CN CN202121274942.0U patent/CN215830992U/en active Active
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