Forging forming equipment for lightweight motor shaft of automobile

Abstract

The invention relates to the technical field of shaft part machining, in particular to automobile lightweight motor shaft forging forming equipment which comprises a rack and a rotary clamp, a platform is further arranged on the rack, a rotary forging and pressing mechanism is arranged on the platform and provided with a forging and pressing opening, and an annular abutting face is arranged in the rotary forging and pressing mechanism. A forging and pressing head is arranged in the forging and pressing opening and provided with a forging and pressing end and an abutting end, protruding pieces are arranged on the annular abutting face, and the protruding pieces are arranged in the rotary forging and pressing mechanism, so that the protruding pieces can move in the radial direction of the forging and pressing opening while the forging and pressing head rotates in the circumferential direction of the forging and pressing opening, and when the forging and pressing head makes contact with the protruding pieces at different radial positions, the protruding pieces can move in the radial direction. The forging and pressing amplitude is adjusted according to the outline change of the convex part, multi-amplitude forging of the shaft blank is achieved, the rotating clamp can stably clamp the shaft blank and drive the shaft blank to rotate synchronously, it is ensured that all parts of the shaft blank can evenly bear forging pressure, and the problem that stress is uneven due to the fact that the forging and pressing amplitude is fixed in traditional equipment is solved.

Description

Technical Field

[0001] The invention relates to the technical field of shaft parts processing, and in particular to a forging and molding device for a lightweight motor shaft of an automobile. Background Art

[0002] With the increasing demand for lightweight in the automotive industry, the manufacturing process and material selection of motor shafts, as key transmission components, have an increasingly significant impact on the performance of the entire vehicle. Traditional motor shaft manufacturing mostly uses casting or cutting, but these methods have problems such as low material utilization, long processing cycle, and heavy product weight, which make it difficult to meet the requirements of lightweight and high efficiency of modern automobiles. Forging technology has gradually become the mainstream choice for motor shaft manufacturing because it can significantly improve the mechanical properties of materials and reduce material waste. However, the existing forging equipment often finds it difficult to accurately control the forging amplitude during the motor shaft forming process, resulting in unstable product dimensional accuracy and mechanical properties, which restricts the further development of motor shaft lightweight design.

[0003] Patent document announcement number CN114433769B discloses a lightweight motor shaft forming device and method, including a workbench and a motor, wherein a support seat is fixedly connected to the center position of the workbench, a cylindrical and horizontally placed rotary forging seat is fixedly connected to the support seat, a cylindrical working groove is concentrically opened on one side of the rotary forging seat, an annular groove with a T-shaped cross-section is concentrically opened on the groove wall of the working groove, and a connecting slip ring with a T-shaped cross-section is slidably connected in the annular groove.

[0004] The invention utilizes the circular arc groove to squeeze and push the pin so that all the clamps in the clamping groove move toward the axis at the same time, clamp the pipe and the core rod and keep the pipe coaxial with the forging mouth, so as to ensure the processing quality of the pipe. When it is necessary to reduce the impact forging frequency, the movement restriction of the roller is released by pulling the control ball outward, and then the handle is pulled to move the arc-shaped mouth on the roller to the rotation path of the pressure head. By reducing the number of contactable rollers and increasing the distance between the contactable rollers, the impact forging frequency is changed. However, the position of the roller is usually fixed, and this design has certain limitations. When the arc-shaped mouth on the roller moves to the rotation path of the pressure head, the pressure head cannot apply forging pressure to the motor shaft at this position. At the same time, because the motor shaft is fixed during the forging process and cannot rotate relative to the forging mouth, the area opposite to the arc-shaped mouth of the motor shaft and the roller cannot be subjected to uniform forging force. This uneven force distribution will cause local deformation of the motor shaft during the forging process, thereby affecting the accuracy of the overall shape and the uniformity of the mechanical properties, ultimately resulting in the inability to meet the forging requirements of the motor shaft. Summary of the invention

[0005] In view of the problems existing in the prior art, a forging equipment for lightweight motor shafts of automobiles is provided. By arranging a convex part in a rotary forging mechanism, the convex part can move radially along the forging port while the forging head rotates circumferentially along the forging port. This design enables the forging head to adjust the forging amplitude according to the contour change of the convex part when contacting with the convex parts at different radial positions, thereby realizing multi-amplitude forging of the shaft blank. At the same time, the rotating clamp can stably clamp the shaft blank and drive it to rotate synchronously, ensuring that all parts of the shaft blank can evenly withstand the forging pressure, avoiding the problem of uneven force caused by fixed forging amplitude in traditional equipment.

[0006] In order to solve the problems of the prior art, the present invention provides a forging device for a lightweight motor shaft of an automobile, comprising a frame and a rotating fixture arranged on the frame and capable of laterally clamping and rotating a shaft blank. The frame is also provided with a platform which can move laterally to approach the rotating fixture, and the platform is provided with a rotating forging mechanism, the rotating forging mechanism having a forging opening through which the shaft blank can pass coaxially, an annular abutting surface coaxial with the forging opening is arranged inside the rotating forging mechanism, a forging head distributed along its circumference is arranged inside the forging opening, the forging head having a forging end close to the axis of the forging opening and an abutting end capable of abutting against the annular abutting surface, a convex piece facing the axis of the forging opening is arranged on the annular abutting surface, and the convex piece can move radially along the forging opening while the forging head rotates circumferentially along the forging opening.

[0007] Preferably, the interior of the rotary forging mechanism is also provided with an inner driving cylinder coaxial with the forging port, the inner driving cylinder is provided with mounting grooves distributed along its circumference, the mounting grooves extend radially along the forging port, and the forging head is slidably arranged in the mounting grooves.

[0008] Preferably, the abutting end of the forging head is provided with a side ear larger than the mounting groove, an elastic element is provided between the side ear and the outer circumferential surface of the inner driving cylinder, and the abutting end of the forging head elastically abuts against the annular abutting surface.

[0009] Preferably, the abutting end of the forging head rolls against the annular abutting surface and the convex part, and a wheel groove extending along its length direction is provided on the abutting surface end of the forging head, and an abutting wheel rotatably connected thereto is provided in the wheel groove.

[0010] Preferably, the protrusion includes a conical wheel capable of moving in a direction parallel to the axis of the forging port, the annular abutment surface is provided with notches distributed along its circumference, the circumferential surface of the conical wheel extends into the notches to form a protrusion, and when the conical wheel moves along its axial direction, the protrusion moves radially along the forging port.

[0011] Preferably, the rotary forging mechanism also includes two coaxially arranged annular end plates and a connecting cylinder coaxially arranged between the two end plates, the inner circumferential surface of the connecting cylinder forms the annular abutment surface, the two ends of the inner driving cylinder are coaxially rotatably connected to the annular end plates, a driving motor is arranged on the platform, and the output shaft of the driving motor is synchronously connected to one end of the inner driving cylinder.

[0012] Preferably, an outer driving cylinder rotatably connected to the outer driving cylinder and a driving seat distributed circumferentially therewith are provided between the two annular end plates; the driving seat can move in a direction parallel to the axis of the forging port; the conical wheel is rotatably provided on the driving seat; a driving column is provided at one end of the driving seat facing the outer driving cylinder; an arc groove distributed circumferentially therewith and coaxial therewith is provided on the inner wall of the outer driving cylinder; the driving column extends into the arc groove and slidably cooperates therewith.

[0013] Preferably, a rack capable of lateral movement and an electric push rod capable of driving the spur rack to lateral movement are provided on the platform, and an arc-shaped rack coaxial with the outer surface of the outer driving cylinder is provided, and the arc-shaped rack meshes with the spur rack.

[0014] Preferably, a positioning shaft vertically connected to the two annular end plates is provided at the notch, and the cone wheel is coaxially rotatably arranged on the positioning shaft. Two connecting rods are also provided between the two end plates. The connecting rods and the positioning shaft pass through the drive seat and slideably cooperate with it. The drive seat has an opening facing the notch, and the cone wheel is located in the opening.

[0015] Preferably, the forging head includes a pressing seat slidably arranged in the mounting groove and a forging seat engaged with the pressing head. In an initial state, the forging seat is located in the forging port, and the forging head can be separated from the pressing seat along the axial direction of the forging port.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present application sets a convex part in the rotary forging mechanism, so that the convex part can move radially along the forging port while the forging head rotates circumferentially along the forging port. This design enables the forging head to adjust the forging amplitude according to the contour change of the convex part when it contacts the convex parts at different radial positions, thereby realizing multi-amplitude forging of the shaft blank. At the same time, the rotary clamp can stably clamp the shaft blank and drive it to rotate synchronously, ensuring that all parts of the shaft blank can evenly bear the forging pressure, avoiding the problem of uneven force caused by fixed forging amplitude in traditional equipment.

[0017] This effectively solves the problem that existing motor shaft forming equipment cannot uniformly forge shaft blanks at different amplitudes. Through the synergistic effect of the radial movement of the protrusion and the rotating fixture, not only can the shaft blank be uniformly deformed in the circumferential and radial directions, but the forging amplitude can also be flexibly adjusted according to process requirements, thereby improving the forming accuracy and mechanical properties of the motor shaft. This improvement provides reliable technical support for the efficient and high-quality manufacturing of lightweight automotive motor shafts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereoscopic diagram of a forging device for a lightweight motor shaft of an automobile according to the present invention.

[0019] Figure 2 The invention discloses a side view of a rotary forging mechanism in a forging device for a lightweight motor shaft of an automobile.

[0020] Figure 3 It is a stereoscopic diagram of a rotary forging mechanism in a forging and forming device for a lightweight motor shaft of an automobile according to the present invention.

[0021] Figure 4 The present invention is a schematic diagram of the internal structure of a rotary forging mechanism in a forging device for a lightweight motor shaft of an automobile.

[0022] Figure 5 The invention discloses a distribution diagram of forging heads in a rotary forging mechanism in a forging device for a lightweight motor shaft of an automobile.

[0023] Figure 6 It is a schematic diagram of a protrusion in a rotary forging mechanism in a forging device for a lightweight motor shaft of an automobile according to the present invention.

[0024] Figure 7 It is a stereoscopic view of a connecting cylinder of a rotary forging mechanism in a forging device for a lightweight automobile motor shaft according to the present invention.

[0025] Figure 8 It is a stereoscopic diagram of a driving seat in a forging device for a lightweight motor shaft of an automobile according to the present invention.

[0026] Fig. 9 It is a schematic diagram of a forging head and an inner driving cylinder in a forging device for a lightweight automobile motor shaft according to the present invention.

[0027] Fig.10 The present invention is a three-dimensional exploded view of a forging head in a forging and forming device for a lightweight motor shaft of an automobile.

[0028] The numbers in the figure are: 1, frame; 11, platform; 2, rotating fixture; 3, rotating forging mechanism; 311, forging port; 312, annular abutment surface; 3121, notch; 32, forging head; 321, side ear; 322, elastic element; 323, abutment wheel; 324, abutment seat; 325, forging seat; 33, convex part; 34, inner driving cylinder; 341, mounting groove; 351, annular end plate; 352, connecting cylinder; 353, driving motor; 354, outer driving cylinder; 3541, arc groove; 355, driving seat; 3551, driving column; 361, straight rack; 362, electric push rod; 363, arc rack; 371, positioning shaft; 372, connecting rod. DETAILED DESCRIPTION

[0029] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, a lightweight automobile motor shaft forging device includes a frame 1 and a rotating fixture 2 arranged on the frame 1 and capable of laterally clamping and rotating a shaft blank. The frame 1 is also provided with a platform 11 capable of laterally moving to approach the rotating fixture 2, and a rotating forging mechanism 3 is arranged on the platform 11. The rotating forging mechanism 3 has a forging opening 311 for the shaft blank to coaxially pass through, and an annular abutting surface 312 coaxial with the forging opening 311 is arranged inside the rotating forging mechanism 3. A forging head 32 distributed along its circumference is arranged inside the forging opening 311, and the forging head 32 has a forging end close to the axis of the forging opening 311 and an abutting end capable of abutting on the annular abutting surface, and a convex part 33 facing the axis of the forging opening 311 is arranged on the annular abutting surface, and the convex part 33 can move radially along the forging opening 311 while the forging head 32 rotates circumferentially along the forging opening 311.

[0031] The motor shaft forging equipment includes a frame 1 and a rotating fixture 2 arranged on the frame 1 for laterally clamping and rotating the shaft blank. The frame 1 is also provided with a platform 11 capable of laterally moving, and the platform 11 can be close to or away from the rotating fixture 2 along the axial direction to meet the processing requirements of shaft blanks of different sizes. A rotary forging mechanism 3 is installed on the platform 11, and a forging port 311 is provided in the center of the mechanism for the shaft blank to coaxially pass through, so as to ensure that the shaft blank can maintain stable centering during the forging process. An annular abutment surface 312 coaxial with the forging port 311 is designed inside the rotary forging mechanism 3, and a plurality of forging heads 32 are distributed circumferentially inside the forging port 311, and each forging head 32 includes a forging end close to the axis of the forging port 311 and an abutment end abutting against the annular abutment surface 312.

[0032] In order to further improve the forging accuracy and flexibility, a protrusion 33 facing the axis of the forging port 311 is provided on the annular abutment surface 312. These protrusions 33 can move radially along the forging port 311 while the forging head 32 rotates circumferentially along the forging port 311, thereby dynamically adjusting the forging amplitude of the forging head 32. When the forging head 32 contacts the protrusions 33 at different radial positions, its forging end will automatically adjust its position according to the contour change of the protrusion 33, so as to realize multi-amplitude and adjustable forging of the shaft blank. At the same time, the rotating clamp 2 can stably clamp the shaft blank and drive it to rotate synchronously, ensuring that all parts of the shaft blank can evenly withstand the forging pressure, avoiding the problem of uneven force caused by the fixed forging amplitude in traditional equipment.

[0033] like Figure 4 , Figure 5 and Fig. 9 As shown, the interior of the rotary forging mechanism 3 is also provided with an inner driving cylinder 34 coaxial with the forging port 311, and the inner driving cylinder 34 is provided with mounting grooves 341 distributed along its circumference. The mounting grooves 341 extend radially along the forging port 311, and the forging head 32 is slidably arranged in the mounting grooves 341.

[0034] The rotary forging mechanism 3 is also provided with an inner driving cylinder 34 coaxial with the forging port 311, and the inner driving cylinder 34 can realize precise rotational motion through an external power system. The outer peripheral surface of the inner driving cylinder 34 is provided with mounting grooves 341 evenly distributed along its circumference, and the mounting grooves 341 extend radially along the forging port 311, providing a stable sliding track for the forging head 32. The forging head 32 is slidably arranged in the mounting grooves 341, and can move freely in the radial direction, and move synchronously with the rotation of the inner driving cylinder 34. Not only does it ensure the coordinated movement of the forging head 32 in the circumferential and radial directions, but it also provides it with sufficient flexibility to meet the processing requirements of shaft blanks of different shapes and sizes.

[0035] In order to further improve the movement accuracy and stability of the forging head 32, a guide mechanism or a lubrication device can be provided in the mounting groove 341 to reduce the friction resistance of the forging head 32 when sliding, thereby ensuring its stability during high-speed rotation and radial movement.

[0036] like Figure 4 and Fig. 9 As shown, the abutting end of the forging head 32 is provided with a side ear 321 larger than the mounting groove 341 , and an elastic element 322 is provided between the side ear 321 and the outer circumferential surface of the inner driving cylinder 34 , and the abutting end of the forging head 32 elastically abuts against the annular abutting surface 312 .

[0037] The abutting end of the forging head 32 is provided with a side ear 321, and the size of the side ear 321 is larger than the width of the mounting groove 341, so as to effectively prevent the forging head 32 from being separated from the mounting groove 341 during circumferential rotation, thereby ensuring its stability and safety during high-speed movement. An elastic element 322, such as a spring or an elastic gasket, is provided between the side ear 321 and the outer circumferential surface of the inner driving cylinder 34. These elastic elements 322 not only provide radial elastic support for the forging head 32, but also can buffer the impact force generated during the forging process and reduce equipment wear. Through the design of the elastic element 322, the abutting end of the forging head 32 can always elastically abut on the annular abutting surface 312, ensuring that the contact pressure between the forging head 32 and the protrusion 33 is uniform and controllable.

[0038] The introduction of the elastic element 322 enables the forging head 32 to automatically adjust its position according to the profile change of the protrusion 33, thereby realizing multi-amplitude and adaptive forging of the shaft blank. At the same time, the coordinated use of the side ears 321 and the elastic element 322 effectively avoids the risk of the forging head 32 being separated from the mounting groove 341 due to centrifugal force or other external forces during high-speed rotation, thereby enhancing the reliability and durability of the equipment.

[0039] like Figure 5 and Figure 7 As shown, the abutting end of the forging head 32 rolls against the annular abutting surface 312 and the protrusion 33, and a wheel groove extending along its length direction is provided on the abutting surface end of the forging head 32, and an abutting wheel 323 rotatably connected thereto is provided in the wheel groove.

[0040] In order to significantly reduce the friction between the forging head 32 and the annular abutment surface 312 and the convex part 33, the abutment end of the forging head 32 adopts a rolling friction design. The abutment end of the forging head 32 is provided with a wheel groove extending along its length direction, and an abutment wheel 323 is installed in the wheel groove to be rotatably connected with it. The abutment wheel 323 can rotate freely in the wheel groove. When the forging head 32 moves along the annular abutment surface, a rolling contact is formed between the abutment wheel 323 and the annular abutment surface 312 and the convex part 33, thereby converting the traditional sliding friction into rolling friction, greatly reducing the friction resistance and energy loss.

[0041] This rolling friction design not only improves the movement efficiency of the forging head 32, but also reduces wear during the operation of the equipment and extends the service life of key components. In addition, the rotating connection design of the abutment wheel 323 enables it to adapt to the contour changes of the annular abutment surface 312 and the protrusion 33, ensuring that the forging head 32 always maintains a stable contact pressure during movement, further improving the forging accuracy and uniformity. To further optimize performance, the abutment wheel 323 can be made of high-strength wear-resistant materials, and a lubrication device or a friction-reducing coating can be set in the wheel groove to further reduce the friction coefficient.

[0042] like Fig. 9 As shown, the protrusion 33 includes a cone wheel that can move in a direction parallel to the axis of the forging port 311, and the annular abutment surface 312 is provided with notches 3121 distributed along its circumference. The circumferential surface of the cone wheel extends into the notches 3121 to form a protrusion. When the cone wheel moves along its axial direction, the protrusion moves radially along the forging port 311.

[0043] The protrusion 33 includes a cone wheel, which can move in a direction parallel to the axis of the forging port 311, so as to realize dynamic adjustment of the forging amplitude of the forging head 32. The annular abutment surface 312 is provided with notches 3121 evenly distributed along its circumference, and the circumferential surface of the cone wheel extends into these notches 3121 to form a convex structure. When the cone wheel moves along its axial direction, the height of the protrusion will change accordingly, thereby driving the forging head 32 to move radially along the forging port 311, and realizing precise control of the forging amplitude. By adjusting the axial position of the cone wheel, the contact part between the forging head 32 and the cone wheel can be changed, and then the forging amplitude of the forging head 32 can be adjusted to meet different process requirements.

[0044] like Figure 3 and Figure 4 As shown, the rotary forging mechanism 3 also includes two coaxially arranged annular end plates 351 and a connecting tube 352 coaxially arranged between the two end plates. The inner circumferential surface of the connecting tube 352 forms the annular abutment surface 312. The two ends of the inner driving tube 34 are coaxially rotatably connected to the annular end plates 351. A driving motor 353 is arranged on the platform 11. The output shaft of the driving motor 353 is synchronously connected to one end of the inner driving tube 34.

[0045] The inner circumferential surface of the connecting cylinder 352 forms an annular abutment surface 312, which provides stable support and guidance for the movement of the forging head 32. The two ends of the inner driving cylinder 34 are coaxially connected to the annular end plate 351 through bearings or other rotating connection devices to ensure the stability and symmetry of the inner driving cylinder 34 during high-speed rotation. A driving motor 353 is provided on the platform 11, and the output shaft of the driving motor 353 is synchronously connected to one end of the inner driving cylinder 34 through a transmission device such as a coupling or a synchronous belt, thereby providing a stable and adjustable rotational power for the inner driving cylinder 34.

[0046] The combination of the annular end plate 351 and the connecting tube 352 forms a closed rigid frame, which can effectively resist the high load and vibration generated during the forging process, ensuring the reliability of the equipment during long-term operation.

[0047] like Figure 6 and Figure 7As shown, an outer driving cylinder 354 rotatably connected to the two annular end plates 351 and a driving seat 355 distributed along the circumference thereof are also provided between the two annular end plates 351. The driving seat 355 can move in a direction parallel to the axis of the forging port 311. The cone wheel is rotatably provided on the driving seat 355. A driving column 3551 is provided at one end of the driving seat 355 facing the outer driving cylinder 354. The inner wall of the outer driving cylinder 354 is provided with an arc groove 3541 distributed along the circumference thereof and coaxial therewith. The driving column 3551 extends into the arc groove 3541 and slidably cooperates therewith.

[0048] The driving seat 355 can move in a direction parallel to the axis of the forging port 311, thereby providing power support for the axial position adjustment of the cone wheel. The cone wheel is mounted on the driving seat 355 through a bearing or other rotating connection device, so that it can move along the axial direction driven by the driving seat 355 while maintaining free rotation. A driving column 3551 is provided at one end of the driving seat 355 facing the outer driving cylinder 354, and an arc groove 3541 distributed along its circumference and coaxial with it is provided on the inner wall of the outer driving cylinder 354, and the driving column 3551 extends into the arc groove 3541 and slides with it. When the outer driving cylinder 354 rotates, the contour of the arc groove 3541 drives the column 3551 to move along the axial direction, thereby driving the driving seat 355 and the cone wheel to achieve precise adjustment of the axial position.

[0049] This design not only realizes the dynamic control of the axial position of the cone wheel, but also significantly improves the motion accuracy and response speed of the equipment. The rotational motion of the outer drive cylinder 354 is converted into the linear motion of the drive seat 355 through the cooperation of the arc groove 3541 and the drive column 3551, thereby realizing the precise adjustment of the position of the cone wheel. The profile of the arc groove 3541 can be optimized according to the process requirements to meet the requirements of different forging amplitudes.

[0050] like Figure 5 As shown, the platform 11 is provided with a spur rack 361 capable of lateral movement and an electric push rod 362 capable of driving the spur rack 361 to lateral movement, and the outer surface of the outer driving cylinder 354 is provided with an arc-shaped rack 363 coaxial therewith, and the arc-shaped rack 363 is meshed with the spur rack 361.

[0051] The platform 11 is provided with a spur rack 361 capable of lateral movement. The movement of the spur rack 361 is driven by an electric push rod 362. The electric push rod 362 adjusts the lateral position of the spur rack 361 through a precise control system, thereby providing power for the rotation of the outer drive cylinder 354. The outer surface of the outer drive cylinder 354 is provided with an arc-shaped rack 363 coaxial therewith. The arc-shaped rack 363 meshes with the spur rack 361 to form a gear transmission structure. When the electric push rod 362 drives the spur rack 361 to move lateral, the meshing action of the spur rack 361 and the arc-shaped rack 363 drives the outer drive cylinder 354 to rotate around its axis, thereby achieving precise control of the rotational movement of the outer drive cylinder 354.

[0052] like Figure 8 As shown, a positioning shaft 371 vertically connected to the two annular end plates 351 is provided at the notch 3121, and the cone wheel is coaxially rotatably arranged on the positioning shaft 371. Two connecting rods 372 are also provided between the two end plates. The connecting rod 372 and the positioning shaft 371 pass through the drive seat 355 and slide with it. The drive seat 355 has an opening facing the notch 3121, and the cone wheel is located in the opening.

[0053] A positioning shaft 371 is provided at the notch 3121 of the annular abutment surface 312. The positioning shaft 371 is vertically connected to the two annular end plates 351, providing a stable installation foundation for the cone wheel. The cone wheel is coaxially rotatably arranged on the positioning shaft 371 through a bearing or other rotating connection device, so that it can rotate freely on the positioning shaft 371 while maintaining accurate alignment with the annular abutment surface 312. Two connecting rods 372 are also provided between the two annular end plates 351. The connecting rods 372 are parallel to the positioning shaft 371 and penetrate the drive seat 355, and slide with the drive seat 355 to ensure the stability and guiding accuracy of the drive seat 355 when moving along the axial direction. The drive seat 355 is designed with an opening structure facing the notch 3121. The cone wheel is located in the opening, so that the circumferential surface of the cone wheel can extend into the notch 3121 to form a protrusion and maintain contact with the abutment end of the forging head 32.

[0054] like Fig.10 As shown, the forging head 32 includes a pressing seat 324 slidably arranged in the mounting groove 341 and a forging seat 325 engaged with the pressing head. In the initial state, the forging seat 325 is located in the forging port 311, and the forging head 32 can be separated from the pressing seat 324 along the axial direction of the forging port 311.

[0055] The forging head 32 is composed of two parts: a pressing seat 324 slidably arranged in the mounting groove 341 and a forging seat 325 connected in an interlocking manner with the pressing seat 324. The pressing seat 324 is installed in the mounting groove 341 by sliding fit, and can move radially along the forging port 311 under the guidance of the mounting groove 341, and at the same time maintains elastic contact with the outer circumferential surface of the inner driving cylinder 34 through the elastic element 322, so as to ensure the stability and flexibility of the forging head 32 during the movement. The forging seat 325 is fixed to the pressing seat 324 by an interlocking connection. In the initial state, the forging seat 325 is located in the forging port 311, and its forging end faces the axis of the forging port 311, so as to directly apply forging pressure to the shaft blank. In addition, the forging head 32 is designed as a detachable structure, so that the forging seat 325 can be separated from the pressing seat 324 along the axial direction of the forging port 311, which is convenient for quick replacement or maintenance of the forging seat 325 to meet the processing requirements of different specifications or wear states. The interlocking connection between the pressing seat 324 and the forging seat 325 ensures stable cooperation between the two under high load conditions, while reducing vibration and energy loss during movement.

[0056] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A forging equipment for a lightweight motor shaft of an automobile, comprising a frame and a rotating fixture arranged on the frame and capable of laterally clamping and rotating a shaft blank, and a platform capable of laterally moving to approach the rotating fixture is also arranged on the frame, characterized in that: A rotary forging mechanism is arranged on the platform, and the rotary forging mechanism has a forging port through which the shaft blank can pass coaxially, and an annular abutting surface coaxial with the forging port is arranged inside the rotary forging mechanism, and a forging head distributed along its circumference is arranged inside the forging port, and the forging head has a forging end close to the axis of the forging port and an abutting end capable of abutting on the annular abutting surface, and a convex part facing the axis of the forging port is arranged on the annular abutting surface, and the convex part can move radially along the forging port while the forging head rotates circumferentially along the forging port.

2. The forging equipment for lightweight motor shaft of an automobile according to claim 1, characterized in that: The rotary forging mechanism is also provided with an inner driving cylinder coaxial with the forging port, the inner driving cylinder is provided with mounting grooves distributed along its circumference, the mounting grooves extend radially along the forging port, and the forging head is slidably arranged in the mounting grooves.

3. The forging equipment for lightweight motor shaft of an automobile according to claim 2, characterized in that: The abutting end of the forging head is provided with a side ear larger than the mounting groove, an elastic element is provided between the side ear and the outer circumferential surface of the inner driving cylinder, and the abutting end of the forging head elastically abuts against the annular abutting surface.

4. The forging equipment for lightweight motor shaft of an automobile according to claim 2, characterized in that: The abutting end of the forging head rolls and rubs against the annular abutting surface and the convex part. The abutting surface end of the forging head is provided with a wheel groove extending along its length direction, and the wheel groove is provided with an abutting wheel rotatably connected thereto.

5. The forging equipment for lightweight motor shafts for automobiles according to any one of claims 1 to 4, characterized in that: The convex part includes a conical wheel capable of moving in a direction parallel to the axis of the forging port, the annular abutment surface is provided with notches distributed along its circumference, the circumferential surface of the conical wheel extends into the notches to form a protrusion, and when the conical wheel moves along its axial direction, the protrusion moves radially along the forging port.

6. The forging equipment for lightweight motor shaft of an automobile according to claim 5, characterized in that: The rotary forging mechanism also includes two coaxially arranged annular end plates and a connecting cylinder coaxially arranged between the two end plates. The inner circumferential surface of the connecting cylinder forms the annular abutment surface. The two ends of the inner driving cylinder are coaxially rotatably connected to the annular end plates. A driving motor is arranged on the platform, and the output shaft of the driving motor is synchronously connected to one end of the inner driving cylinder.

7. The forging equipment for lightweight motor shaft of an automobile according to claim 6, characterized in that: An outer driving cylinder rotatably connected to the outer driving cylinder and a driving seat distributed circumferentially therewith are also provided between the two annular end plates. The driving seat can move in a direction parallel to the axis of the forging port. The cone wheel is rotatably provided on the driving seat. A driving column is provided at one end of the driving seat facing the outer driving cylinder. The inner wall of the outer driving cylinder is provided with an arc groove distributed circumferentially therewith and coaxial therewith. The driving column extends into the arc groove and slidably cooperates therewith.

8. The forging equipment for lightweight motor shaft of an automobile according to claim 7, characterized in that: The platform is provided with a rack capable of lateral movement and an electric push rod capable of driving the spur rack to lateral movement. The outer surface of the outer driving cylinder is provided with an arc-shaped rack coaxial therewith, and the arc-shaped rack meshes with the spur rack.

9. The forging equipment for lightweight motor shaft of an automobile according to claim 7, characterized in that: A positioning shaft vertically connected to the two annular end plates is provided at the notch, and the cone wheel is coaxially rotatably arranged on the positioning shaft. Two connecting rods are also provided between the two end plates. The connecting rod and the positioning shaft pass through the drive seat and slide with it. The drive seat has an opening facing the notch, and the cone wheel is located in the opening.

10. The automobile lightweight motor shaft forging equipment according to any one of claims 2 to 4, characterized in that: The forging head includes a pressing seat slidably arranged in the installation groove and a forging seat engaged with the pressing head. In an initial state, the forging seat is located in the forging port, and the forging head can be separated from the pressing seat along the axial direction of the forging port.

Images