An ejection device for an aluminum alloy wheel forging hydraulic press

Abstract

The present invention relates to the technical field of forging of aluminum alloy wheels. Specifically, it relates to an ejection device for a hydraulic press for forging aluminum alloy wheels, which includes an upper die, a lower die and a lifting device. A plurality of groups of control components are evenly arranged around the center of the hydraulic telescopic rod. A second support component is rotatably arranged at one end of the control component away from the hydraulic telescopic rod. The control component controls the rotation of the second support component through the lifting of the fixed cylinder. A one-way rotatable rolling ball is arranged at one end of the second support component away from the control component; a first support component is also arranged at one end of the second support component away from the control component. One end of the first support component is rotatably connected to the second support component, and the other end is slidably connected to the bottom end of the telescopic groove. The present invention realizes the support, fixation and jacking of the wheel through the cooperation of the first support component and the second support component.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy wheel forging, and specifically, to an ejection device for an aluminum alloy wheel forging hydraulic press. Background Art

[0002] An aluminum alloy wheel forging hydraulic press is a device specifically used for producing aluminum alloy wheels, which mainly forges aluminum alloy materials into shape through hydraulic pressure. It is usually used for the production of wheels for vehicles such as automobiles and motorcycles to ensure the high strength, light weight and durability of the wheels; during the forging process, a short bar is heated and then placed in the corresponding mold, and after being pressed by a rotary forging press, a primary forging press and a final forging press, and finally through trimming and hole expanding, the forging process can be completed.

[0003] After retrieval, the lower ejection device applicable to an aluminum alloy wheel forging hydraulic press disclosed in the publication number CN214920197U includes a lower ejection cylinder installed at the bottom of the lower crossbeam. The upper end of the lower ejection cylinder is connected to a transition rod through a connecting sleeve, a ejector rod is installed at the upper end of the transition rod, a guide sleeve is installed on the lower crossbeam, the ejector rod passes through the guide sleeve and a backing plate installed on the lower crossbeam, and the diameter of the transition rod is larger than that of the ejector rod.

[0004] In the above patent, there are still deficiencies in actual use. When the forging hydraulic press is lifted after the downward pressing is completed, either because the upper die and the wheel are easily attached to the upper die after being pressed together, the wheel will be attached to the upper die during the rising stage of the upper die, and a mechanical hand needs to take a downward pulling action to complete the demolding, which is likely to damage the wheel and affect the transfer efficiency of subsequent processes; or the wheel is attached to the lower die, and the mechanical hand will also take an upward pulling action to achieve demolding; in summary, when the forging hydraulic press applies forging pressure to the wheel, there are program redundancies and threats to the appearance of the wheel during the demolding stage.

[0005] Based on this, the present invention discloses an ejection device for an aluminum alloy wheel forging hydraulic press. Summary of the Invention

[0006] To solve the problems raised in the background art, the object of the present invention is to provide an ejection device for an aluminum alloy wheel forging hydraulic press. The lifting of the fixed cylinder drives the rack to move up and down, thereby driving the support plate and the support rod, and driving the up and down movement of the rolling ball, ensuring that the rolling ball can effectively slide on the inner wall of the wheel hub and gradually fit, thereby stabilizing the position of the wheel hub and preventing shaking during the forging process; secondly, the cooperation of the rack with the transmission gear and the driving gear can adjust the position of the rolling ball, so that it gradually fits the inner wall of the wheel hub during the descent, ensuring the stability during the ascent and descent of the fixed cylinder, and ensuring that the wheel hub will not have unnecessary contact or friction with the upper die or the lower die during the entire forging process, thereby reducing die damage and improving the demoulding efficiency; then, in cooperation with the unidirectional rotation assembly, the rolling ball is restricted to rotate only when the fixed cylinder descends and cannot rotate in the reverse direction when ascending, ensuring that the rolling ball can smoothly fit and roll to the inner wall when descending, and restricting the rotation of the rolling ball when ascending to provide an upward pushing force for the demoulding of the wheel hub; finally, combined with the stable triangular structure of the support rod, the support plate and the rolling ball, the support rod is slidably connected to the chute through the roller, ensuring that the movement trajectories of the support plate and the support rod are coordinated, and at the same time stably supporting the rolling ball.

[0007] To achieve the above object, the present invention provides an ejection device for an aluminum alloy wheel forging hydraulic press, which includes a control frame, on which a forging hydraulic press body is provided. Below the forging hydraulic press body, an upper die is provided. Below the upper die on the control frame, a lower control console is provided. An expansion slot is opened in the lower control console, and a lifting device is arranged in the expansion slot. An upper die adapted to the upper die is arranged on the lifting device. A wheel hub to be forged is arranged on the upper die. The lifting device includes a fixed cylinder, and a hydraulic telescopic rod is arranged in the fixed cylinder;

[0008] Preferably, a plurality of groups of control components are evenly arranged around the center of the hydraulic telescopic rod. The end of the control component away from the hydraulic telescopic rod is rotatably provided with a second support component. The control component controls the rotation of the second support component through the lifting of the fixed cylinder. A rolling ball that can only rotate unidirectionally is arranged at the end of the second support component away from the control component; a first support component is also arranged at the end of the second support component away from the control component. One end of the first support component is rotatably connected to the second support component, and the other end is slidably connected to the bottom end of the expansion slot, where:

[0009] In the initial state, the fixed cylinder ascends, the wheel hub is sleeved on the upper die, and the ascent of the fixed cylinder drives the ends of the second support component and the first support component away from the fixed cylinder to lift;

[0010] Working state, the fixed cylinder descends, driving the second support assembly and the first support assembly to descend away from one end of the fixed cylinder through the control assembly, and the rolling ball rolls and abuts against the inner wall of the hub;

[0011] Demolding state, the fixed cylinder ascends, driving the second support assembly and the first support assembly to lift away from one end of the fixed cylinder through the control assembly, and the rolling ball drives the hub to lift and separate from the lower mold by friction with the inner wall of the hub.

[0012] As a further improvement of this technical solution, the lifting device further includes a mounting ring, and the mounting ring is fixedly connected to the fixed cylinder.

[0013] As a further improvement of this technical solution, the control assembly includes a rack and a mounting frame. The rack is fixedly connected to the mounting ring, the mounting frame is fixedly connected to the hydraulic telescopic rod, the rack meshes with a transmission gear, the transmission gear is rotatably connected to the mounting frame, a driving gear meshes with one side of the transmission gear away from the rack, the driving gear is fixedly connected to a first rotating rod, and the first rotating rod is rotatably connected to the mounting frame.

[0014] As a further improvement of this technical solution, the second support assembly includes a support plate. One end of the support plate is fixedly connected to the first rotating rod, and the other end is rotatably connected to a second rotating rod. A rolling ball is fixedly connected to the second rotating rod, and a one-way rotation assembly is further arranged on the second rotating rod for restricting the rolling ball to rotate only during the descent of the fixed cylinder.

[0015] Preferably, the one-way rotation assembly includes a ratchet wheel, the ratchet wheel is fixedly connected to the second rotating rod, the ratchet wheel meshes with a ratchet pawl, the ratchet pawl is rotatably connected to a screw rod, the screw rod is fixedly connected to a mounting plate, the mounting plate is fixedly connected to the support plate, and a spring for causing the ratchet pawl to always fit with the ratchet wheel is further arranged on the ratchet pawl. One end of the spring is fixedly connected to the ratchet pawl, and the other end is fixedly connected to the mounting plate.

[0016] As a further improvement of this technical solution, the first support assembly includes support rods rotatably connected to both sides of the second rotating rod. One end of the support rod away from the second rotating rod is rotatably connected to a bottom plate, rollers are rotatably connected to both ends of the bottom plate, a sliding groove parallel to the radial direction of the telescopic groove is opened at the bottom end of the telescopic groove, and the rollers are slidably connected in the sliding groove.

[0017] Preferably, when the fixed cylinder descends to the initial position, the rack drives the driving gear to rotate, causing the support plate to be in a horizontal position. At this time, the tangent of the rolling ball is in contact with the inner wall of the hub, and the roller is in contact with the inner wall of the end of the chute near the fixed cylinder.

[0018] As a further improvement of this technical solution, during the ascending process of the fixed cylinder, the rack drives the driving gear to rotate. Through the support plate, the rolling ball slides on the inner wall of the hub. When the fixed cylinder ascends to the apex, the rolling ball is separated from the inner wall of the hub.

[0019] Preferably, the rolling ball is made of a material with high temperature resistance, a relatively high friction coefficient, and elasticity.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. In the ejection device for an aluminum alloy wheel hub forging hydraulic press, through the cooperation of the lifting of the fixed cylinder and the rack, the lifting of the fixed cylinder will drive the rack to move synchronously, which is beneficial to driving the rotation of the transmission gear and the driving gear, and then realizing the lifting and rotation of the second support assembly, so as to realize that the rolling ball can flexibly adjust its position according to the working state of the forging hydraulic press, and achieve fitting or separation with the inner wall to be forged. Secondly, the transmission gear meshes with the rack, and the driving gear meshes with the other side of the transmission gear, so that the lifting of the rack can be converted into the reverse rotation of the driving gear, and then drive the adaptive rotation of the second support assembly, facilitating the rolling ball to roll in a predetermined direction during the lifting and lowering of the fixed cylinder and achieving good fitting with the inner wall.

[0022] 2. In the ejection device for an aluminum alloy wheel hub forging hydraulic press, by setting the one-way rotation assembly, the one-way rotation assembly restricts the rotation direction of the rolling ball, so that the rolling ball can only roll in contact with the inner wall when the fixed cylinder descends, and cannot rotate in the reverse direction when the fixed cylinder rises. Thus, when the fixed cylinder rises, the rolling ball can be jacked up by the friction force with the inner wall, facilitating demolding.

[0023] 3. In the ejection device for an aluminum alloy wheel hub forging hydraulic press, through the cooperation of the support plate and the support rod, the support plate is fixedly connected to the second rotating rod, and the support rod is rotatably connected to both sides of the second rotating rod, so that the support plate and the support rod can jointly form a stable triangular structure to support the rolling ball, enhancing the stability when the rolling ball is in contact with the inner wall and preventing shaking during the forging process. Secondly, the roller is slidably connected in the chute, so that the bottom plate can slide along the chute, facilitating the support rod to move in unison with the intersection point of the support plate (i.e., the position of the rolling ball) during the lifting and lowering of the fixed cylinder, and improving the flexibility and stability of the entire ejection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the overall structure of the present invention;

[0025] Figure 2 Schematic diagram one of the structure of the lower mold of the present invention;

[0026] Figure 3 Schematic diagram two of the structure of the lower mold of the present invention;

[0027] Figure 4 Cross-sectional view of the structure of the lower mold of the present invention;

[0028] Figure 5 Schematic diagram of the structure of the lifting device of the present invention;

[0029] Figure 6 Schematic diagram of the structure of the first support assembly of the present invention;

[0030] Figure 7 is Figure 6 Enlarged view of the structure at position A in;

[0031] Figure 8 Schematic diagram of the state of the first support assembly of the present invention.

[0032] The meanings of each label in the figure are as follows:

[0033] 1. Control frame; 2. Forging hydraulic press body; 3. Upper mold; 4. Lower control console; 5. Telescopic groove; 6. Lifting device; 7. Lower mold; 8. Chute; 9. First support assembly; 10. Second support assembly; 11. Control assembly; 12. Hub;

[0034] 61. Fixed cylinder; 62. Hydraulic telescopic rod; 63. Installation ring;

[0035] 91. Support rod; 92. Bottom plate; 93. Roller;

[0036] 101. Support plate; 102. Ball; 103. Second rotating rod; 104. One-way rotating assembly;

[0037] 1041. Ratchet; 1042. Pawl; 1043. Screw; 1044. Installation plate; 1045. Spring;

[0038] 111. Rack; 112. Driving gear; 113. Driving gear; 114. First rotating rod; 115. Installation frame. Detailed implementation manners

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] In the existing forging hydraulic press, the hub is likely to adhere to the upper die 3 or the lower die 7 during the demolding stage, making it difficult to demold.

[0041] For this reason, the present invention provides an ejection device for an aluminum alloy wheel hub forging hydraulic press. Refer to Figures 1-5 As shown in the figure, it includes a control frame 1. A forging hydraulic press body 2 is arranged on the control frame 1. An upper die 3 is arranged below the forging hydraulic press body 2. A lower control console 4 is arranged directly below the upper die 3 on the control frame 1. A telescopic groove 5 is opened in the lower control console 4. A lifting device 6 is arranged in the telescopic groove 5. A lower die 7 adapted to the upper die 3 is arranged on the lifting device 6. A hub 12 to be forged is arranged on the lower die 7. The lifting device 6 includes a fixed cylinder 61, and a hydraulic telescopic rod 62 is arranged in the fixed cylinder 61.

[0042] Specifically, refer to Figures 4-6 As shown in the figure, a number of control components 11 are evenly arranged around the center of the hydraulic telescopic rod 62. A second support component 10 is rotatably arranged at one end of the control component 11 away from the hydraulic telescopic rod 62. The control component 11 controls the rotation of the second support component 10 through the lifting of the fixed cylinder 61. A one-way rotatable rolling ball 102 is arranged at one end of the second support component 10 away from the control component 11. A first support component 9 is also arranged at one end of the second support component 10 away from the control component 11. One end of the first support component 9 is rotatably connected to the second support component 10, and the other end is slidably connected to the bottom end of the telescopic groove 5.

[0043] In the initial state, the fixed cylinder 61 rises, the hub 12 is sleeved on the lower die 7, and the rising of the fixed cylinder 61 drives the ends of the second support component 10 and the first support component 9 away from the fixed cylinder 61 to lift.

[0044] In the working state, the lowering of the fixed cylinder 61 drives the ends of the second support component 10 and the first support component 9 away from the fixed cylinder 61 to descend, and the rolling ball 102 rolls and abuts against the inner wall of the hub 12.

[0045] In the demolding state, the rising of the fixed cylinder 61 drives the ends of the second support component 10 and the first support component 9 away from the fixed cylinder 61 to lift, and the rolling ball 102 drives the hub 12 to lift and separate from the lower die 7 through friction with the inner wall of the hub 12.

[0046] It can be seen from this that in combination withFigure 8 As shown in the figure, where a is the vertical line on the inner wall of the hub 12 and b is the tangential vertical line of the rolling ball 102. After the fixing cylinder 61 is lifted from the initial state in the present invention, it drives the control component 11 to drive one end of the second support component 10 away from the fixing cylinder 61 to lift up. The rolling ball 102 will move from position a to position b, facilitating leaving space for the insertion of the hub 12. Then, the hub 12 is placed on the lower die 7. After that, the fixing cylinder 61 starts to descend into the working state. As the fixing cylinder 61 descends, as can also be seen from Figure 8 it, the rolling ball 102 will gradually move from b to a position. During this process, the rolling ball 102 will gradually fit with the inner wall of the hub 12, and then gradually cause the rolling ball 102 to press against the inner wall of the hub 12 by rolling;

[0047] Since the rolling ball 102 can only rotate unidirectionally, that is to say, the rolling ball 102 can only rotate during the process of the fixing cylinder 61 descending, that is, during the process of the rolling ball 102 gradually fitting with the inner wall of the hub 12. This facilitates the rolling ball 102 to gradually press against the inner wall of the hub 12. And through several groups of control components 11 evenly arranged around the center of the fixing cylinder 61, the hub 12 is fixed and stabilized from all around the inner wall of the hub 12, preventing problems such as local stress unevenness caused by the shaking of the hub 12 during the process of the upper die 3 pressing down, resulting in cracks inside the hub 12. Therefore, the process of the fixing cylinder 61 descending drives the rolling ball 102 to fix the hub 12, facilitating the forging and pressing of the hub 12 by the upper die 3 and the lower die 7, and also preventing the top surface of the hub 12 from fitting with the upper die 3 after the upper die 3 presses down. In this way, it can be ensured that the hub 12 is always stable on the lower die 7, and then only need to consider how to separate the hub 12 from the lower die 7;

[0048] After the pressing is completed, the fixing cylinder 61 needs to be lifted to facilitate the subsequent manipulator to take away the hub 12 for subsequent process operations. When the fixing cylinder 61 is lifted, the control component 11 drives the rolling ball 102 to turn from position a to position b. However, as mentioned above, the rolling ball 102 can only rotate unidirectionally. When the rolling ball 102 moves from a to b, the rolling ball 102 will have a relative rotation tendency with the inner wall of the hub 12, only in the opposite direction to the relative rotation direction of the rolling ball 102 when it moves from b to a. But at this time, the rolling ball 102 cannot rotate. Therefore, several groups of rolling balls 102 can rely on this frictional force to jointly lift the hub 12, facilitating the demolding of the hub 12 from the lower die 7.

[0049] Next, the specific structure of the present invention will be disclosed. First, refer to Figures 4-6As shown, the lifting device 6 further includes a mounting ring 63 which is fixedly connected to the fixed cylinder 61. The control component 11 includes a rack 111 and a mounting bracket 115. The rack 111 is fixedly connected to the mounting ring 63, and the mounting bracket 115 is fixedly connected to the hydraulic telescopic rod 62. The rack 111 meshes with a transmission gear 112 which is rotatably connected to the mounting bracket 115. On the side of the transmission gear 112 away from the rack 111, there is a driving gear 113 meshing with it. The driving gear 113 is fixedly connected to a first rotating rod 114 which is rotatably connected to the mounting bracket 115; From Figure 5 It can also be seen that during the upward or downward movement of the rack 111, it will drive the rotation of the transmission gear 112 meshing with it. However, considering that the upward movement of the rack 111 is in the same direction as the upward movement of the fixed cylinder 61, and the rolling ball 102 also needs to move upward during the upward movement of the rack 111, an additional driving gear 113 meshing with the other side of the transmission gear 112 is added to achieve the change of the rotation direction, so that the rolling ball 102 can move upward or downward following the rhythm of the rack 111; Moreover, by controlling the length of the rack 111 and matching the radii or the number of teeth of the transmission gear 112 and the driving gear 113, it is convenient to adjust the position where the rolling ball 102 moves, so that when the fixed cylinder 61 returns to the initial position, it can ensure that the rolling ball 102 is in close contact with the inner wall of the hub 12 more precisely.

[0050] Secondly, as shown in Figures 6-7 the second support component 10 includes a support plate 101. One end of the support plate 101 is fixedly connected to the first rotating rod 114, and the other end is rotatably connected to a second rotating rod 103. A rolling ball 102 is fixedly connected to the second rotating rod 103. A one-way rotating component 104 is also arranged on the second rotating rod 103 for restricting the rolling ball 102 to rotate only during the downward movement of the fixed cylinder 61.

[0051] Moreover, from Figure 7It can be seen that the unidirectional rotation assembly 104 includes a ratchet wheel 1041 which is fixedly connected to the second rotating rod 103. The ratchet wheel 1041 meshes with a pawl 1042. The pawl 1042 is rotatably connected to a screw rod 1043. The screw rod 1043 is fixedly connected to a mounting plate 1044. The mounting plate 1044 is fixedly connected to a support plate 101. A spring 1045 is further provided on the pawl 1042 for causing the pawl 1042 to always be in contact with the ratchet wheel 1041. One end of the spring 1045 is fixedly connected to the pawl 1042, and the other end is fixedly connected to the mounting plate 1044. Thus, it can be seen that when the fixed cylinder 61 descends and drives the drive gear 113 to rotate through the rack 111, the support plate 101 drives the rolling ball 102 to gradually fit with the inner wall of the hub 12. Then, after the rolling ball 102 rolls a short distance on the inner wall of the hub 12, it is until it is completely and tightly fitted with the inner wall of the hub 12. In this process, the ratchet wheel 1041 and the pawl 1042 are arranged as shown in Figure 7 to make the rotation direction of the rolling ball 102 opposite to that of the drive gear 113. However, when the rolling ball 102 wants to rotate in the reverse direction, that is, when the support plate 101 drives the rolling ball 102 to rise as mentioned above, the rolling ball 102 cannot rotate. Therefore, the entire unidirectional rotation assembly 104 can meet the requirement of the present invention for the unidirectional rotation of the rolling ball 102. The rolling ball 102 cannot rotate during the upward movement, but it has a rolling distance on the inner wall of the hub 12 during the downward movement. Therefore, when the rolling ball 102 moves upward, it will jointly drive the hub 12 to be lifted. After the hub 12 is lifted, the rolling ball 102 gradually disengages from the inner wall of the hub 12, which is convenient for the subsequent manipulator to take away from the lower mold 7.

[0052] Furthermore, referring to Figure 4 and Figure 6As shown in the figure, the first support assembly 9 includes support rods 91 rotatably connected to both sides of the second rotating rod 103. One end of the support rod 91 away from the second rotating rod 103 is rotatably connected to the bottom plate 92. Roller wheels 93 are rotatably connected to both ends of the bottom plate 92. A chute 8 parallel to the radial direction of the telescopic groove 5 is provided at the bottom end of the telescopic groove 5. The roller wheels 93 are slidably connected in the chute 8. The bottom plate 92 is slidably connected in the chute 8 through the roller wheels 93. This setting takes into account that the lengths of the support rod 91 and the support plate 101 are different, and the rotation fulcrums are different. Therefore, at their common intersection point, that is, the rolling ball 102, to keep their actions consistent, it is necessary to make the end of the support rod 91 away from the rolling ball 102 slide along the radial direction of the telescopic groove 5. The setting of the roller wheels 93 can reduce the friction during the sliding process, and at the same time, it also meets the requirement that the actions at the intersection point of the support rod 91 and the support plate 101, that is, the rolling ball 102, are kept consistent. Moreover, the setting of the support rod 91 plays a role in further stably supporting the support plate 101. Combining the support plate 101 and the hydraulic telescopic rod 62 together forms a triangular stable structure at the rolling ball 102, which can ensure the stability when the rolling ball 102 is in contact with the inner wall of the hub 12.

[0053] Furthermore, from Figure 6 and Figure 8 it can be seen that when the fixed cylinder 61 descends to the initial position, the rack 111 drives the driving gear 113 to rotate, causing the support plate 101 to be in a horizontal position. At this time, the tangent of the rolling ball 102 is in contact with the inner wall of the hub 12, and the roller wheels 93 are in contact with the inner wall of the end of the chute 8 close to the fixed cylinder 61. Then, when the fixed cylinder 61 rises, the rack 111 drives the driving gear 113 to rotate. Through the support plate 101, the rolling ball 102 slides on the inner wall of the hub 12. When the fixed cylinder 61 rises to the top, the rolling ball 102 is separated from the inner wall of the hub 12. From Figure 8 it can be seen that when the fixed cylinder 61 reaches the initial position, the support plate 101 drives the rolling ball 102 to roll a certain distance through contact with the inner wall of the hub 12 and then is in a horizontal position. And the end of the support rod 91 away from the rolling ball 102 just abuts against the inner wall of the end of the chute 8 through the bottom plate 92 and the roller wheels 93. In this way, combining the support rod 91, the support plate 101 and the fixed cylinder 61 can form a stable triangular structure. When the fixed cylinder 61 rises or descends, combined with Figure 8 the dotted line part, the movement trajectories of the entire support plate 101 and the support rod 91 can be clearly seen.

[0054] In addition, the rolling ball 102 is made of a material with high temperature resistance, a relatively high coefficient of friction and elasticity. For example, silicon nitride can be used, which can withstand high temperatures up to +1400°C, has a relatively high coefficient of friction, and has strong elasticity and rigidity. The material selection of the rolling ball 102 enables it to withstand the high-temperature forging environment, while having a relatively high coefficient of friction and elasticity, which is beneficial to the good fit between the rolling ball 102 and the inner wall of the wheel hub 12, and can provide sufficient friction to lift the wheel hub 12 during demolding.

[0055] In summary, by raising and lowering the fixed cylinder 61, the rack 111 is driven to rise and fall, and then the support plate 101 and the support rod 91 are linked to drive the rolling ball 102 to lift and lower. Thus, when the wheel hub 12 is sleeved on the lower die 7, the fixed cylinder 61 descends to drive several groups of rolling balls 102 to roll and fit with the inner wall of the wheel hub 12, thereby playing a stabilizing role on the wheel hub 12. Then, after the upper die 3 is pressed down and raised, the fixed cylinder 61 rises, drives the support plate 101 and the support rod 91 to lift through the rack 111, and cooperates with the restriction of the one-way rotation assembly 104 on the rolling ball 102, so that the support plate 101 drives the rolling ball 102 to lift the wheel hub 12 to realize demolding of the wheel hub 12, effectively solving the problem that in the demolding stage of the existing forging hydraulic press, the wheel hub is prone to fit with the upper die 3 or the lower die 7 and is not easy to demold.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ejection device for an aluminum alloy wheel hub forging hydraulic press, comprising a control frame (1), a forging hydraulic press body (2) being arranged on the control frame (1), an upper die (3) being arranged below the forging hydraulic press body (2), a lower control console (4) being arranged on the control frame (1) and directly below the upper die (3), a telescopic slot (5) being provided in the lower control console (4), a lifting device (6) being arranged in the telescopic slot (5), a lower die (7) being arranged on the lifting device (6) and matching with the upper die (3), a wheel hub (12) to be forged being arranged on the lower die (7), the lifting device (6) comprising a fixing cylinder (61), a hydraulic telescopic rod (62) being arranged in the fixing cylinder (61), and characterized in that: A plurality of control components (11) are evenly arranged on the hydraulic telescopic rod (62) around the center of a circle. A second support component (10) is rotatably arranged at one end of the control component (11) away from the hydraulic telescopic rod (62). The control component (11) controls the rotation of the second support component (10) by lifting and lowering the fixed cylinder (61). A rolling ball (102) that can only rotate in one direction is arranged at one end of the second support component (10) away from the control component (11). A first support component (9) is also arranged at one end of the second support component (10) away from the control component (11). One end of the first support component (9) is rotatably connected to the second support component (10), and the other end is slidably connected to the bottom end of the telescopic slot (5), wherein: In the initial state, the fixed cylinder (61) rises, the wheel hub (12) is sleeved on the lower mold (7), and the fixed cylinder (61) rises, driving the second support assembly (10) and the first support assembly (9) to rise away from one end of the fixed cylinder (61) through the control assembly (11); In the working state, the fixed cylinder (61) descends and drives the second support assembly (10) and the first support assembly (9) to descend away from one end of the fixed cylinder (61) through the control assembly (11), and the rolling ball (102) rolls and abuts against the inner wall of the wheel hub (12); In the demoulding state, the fixed cylinder (61) rises and drives the second support assembly (10) and the first support assembly (9) to be lifted away from one end of the fixed cylinder (61) through the control assembly (11), and the rolling ball (102) drives the wheel hub (12) to be lifted and separated from the lower mold (7) through friction with the inner wall of the wheel hub (12).

2. The ejector device for an aluminum alloy wheel forging hydraulic press according to claim 1, characterized in that: The lifting device (6) further comprises a mounting ring (63), wherein the mounting ring (63) is fixedly connected to the fixing cylinder (61).

3. The ejector device for an aluminum alloy wheel forging hydraulic press according to claim 2, characterized in that: The control assembly (11) comprises a rack (111) and a mounting frame (115); the rack (111) is fixedly connected to the mounting ring (63); the mounting frame (115) is fixedly connected to the hydraulic telescopic rod (62); the rack (111) is meshed with a transmission gear (112); the transmission gear (112) is rotatably connected to the mounting frame (115); a driving gear (113) is meshed on a side of the transmission gear (112) away from the rack (111); the driving gear (113) is fixedly connected to a first rotating rod (114); and the first rotating rod (114) is rotatably connected to the mounting frame (115).

4. The ejector device for an aluminum alloy wheel forging hydraulic press according to claim 3, characterized in that: The second support assembly (10) comprises a support plate (101), one end of the support plate (101) being fixedly connected to the first rotating rod (114), and the other end of the support plate being rotatably connected to the second rotating rod (103), the second rotating rod (103) being fixedly connected to a rolling ball (102), and the second rotating rod (103) being further provided with a one-way rotating assembly (104) for limiting the rolling ball (102) to rotate only during the process of the fixed cylinder (61) descending.

5. The ejector device for the aluminum alloy wheel forging hydraulic press according to claim 4, characterized in that: The one-way rotating assembly (104) comprises a ratchet (1041), wherein the ratchet (1041) is fixedly connected to the second rotating rod (103), the ratchet (1041) is meshed with a pawl (1042), the pawl (1042) is rotatably connected to a screw rod (1043), the screw rod (1043) is fixedly connected to a mounting plate (1044), the mounting plate (1044) is fixedly connected to the support plate (101), and the pawl (1042) is also provided with a spring (1045) for causing the pawl (1042) to always fit with the ratchet (1041), one end of the spring (1045) is fixedly connected to the pawl (1042), and the other end is fixedly linked to the mounting plate (1044).

6. The ejector device for the aluminum alloy wheel forging hydraulic press according to claim 5, characterized in that: The first support assembly (9) comprises a support rod (91) rotatably connected to two sides of the second rotating rod (103); one end of the support rod (91) away from the second rotating rod (103) is rotatably connected to a bottom plate (92); rollers (93) are rotatably connected to both ends of the bottom plate (92); a slide groove (8) parallel to the longitudinal direction of the telescopic groove (5) is provided at the bottom end of the telescopic groove (5); and the roller (93) is slidably connected in the slide groove (8).

7. The ejector device for an aluminum alloy wheel forging hydraulic press according to claim 6, characterized in that: When the fixed cylinder (61) descends to the initial position, the rack (111) drives the driving gear (113) to rotate, so that the support plate (101) is in a horizontal position, and at this time, the tangent of the rolling ball (102) fits against the inner wall of the hub (12), and the roller (93) fits against the inner wall of one end of the slide groove (8) adjacent to the fixed cylinder (61).

8. The ejector device for the aluminum alloy wheel forging hydraulic press according to claim 7, characterized in that: When the fixed cylinder (61) is rising, the rack (111) drives the driving gear (113) to rotate, causing the rolling ball (102) to slide on the inner wall of the wheel hub (12) through the support plate (101); when the fixed cylinder (61) rises to the top, the rolling ball (102) is separated from the inner wall of the wheel hub (12).

9. The ejector device for an aluminum alloy wheel forging hydraulic press according to claim 8, characterized in that: The rolling ball (102) is made of a material that is resistant to high temperatures, has a high friction coefficient and is elastic.

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