A combined forming device for producing electric bicycle shafts

Abstract

The invention discloses a combined molding device for producing electric bicycle shafts, which belongs to the technical field of electric bicycle parts production. The device comprises an operating table, a supporting plate is fixedly installed on the upper surface of the operating table, a fixing plate is fixedly installed on the upper surface of the supporting plate, a hydraulic rod is fixedly installed on the upper surface of the fixing plate, and a cooling and demoulding component is arranged on the inner wall of the operating table. In the invention, by arranging the cooling and demoulding component, the lifting plate drives the top block to lift the shaft, and nitrogen is automatically sprayed on the molded shaft, which not only has the effect of cooling the shaft, but also has the effect of cooling the fixing block. The shaft is lifted up while cooling, which, on the one hand, facilitates the removal of the shaft and improves the working efficiency of the molding device, and on the other hand, cools the molding device and increases the service life of the molding device, so as to avoid deformation due to excessive temperature after the use time increases, resulting in a subsequent decrease in the shaft precision.

Description

Technical Field

[0001] The invention belongs to the technical field of electric bicycle parts production, and in particular relates to a molding device for producing a combined electric bicycle shaft. Background Art

[0002] An electric bicycle is a vehicle that uses a battery as an auxiliary energy source and is based on an ordinary bicycle and is equipped with a motor, controller, battery, handlebar, brake handle and other operating components and a display instrument system. Most of the electric bicycle's shafts are formed in one piece using a molding device during production.

[0003] The Chinese patent discloses a forming device (CN107921511A), which expands a metal tube material to form a metal tube. The forming device comprises: a mold, which has an upper mold and a lower mold for forming a metal tube, and at least one of the upper mold and the lower mold can move; an electrode, which energizes the metal tube material to heat the metal tube material; a gas supply part, which supplies gas into the heated metal tube material to expand it; and a mold movement inhibition part, which inhibits the mold from moving based on electromagnetic force at least when the metal tube material is energized by the electrode. Most of the forming devices for producing electric bicycle shafts are extrusion forming. After the forming block is extruded into a shaft, the shaft will adhere to the forming groove, which is not convenient for removing the shaft. At the same time, not only the shaft has a certain temperature during extrusion, but the temperature of the forming device will also increase with the increase of working time, which is easy to cause the forming groove of the forming device to deform and reduce the forming accuracy of the shaft. For this purpose, a combined electric bicycle shaft production forming device is provided. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the current molding device deforms due to excessive temperature as the working time increases, and to propose a combined molding device for producing electric bicycle shafts.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a combined electric bicycle shaft production forming device, comprising an operating table, a support plate is fixedly installed on the upper surface of the operating table, a fixing plate is fixedly installed on the upper surface of the support plate, a hydraulic rod is fixedly installed on the upper surface of the fixing plate, one end of the hydraulic rod extends to the outside of the lower surface of the fixing plate and is fixedly installed with a lower pressing block, a fixing block is fixedly installed on the upper surface of the operating table, the upper surface of the fixing block and the lower surface of the lower pressing block are both provided with forming grooves, a cooling demoulding component is provided on the inner wall of the operating table, a loosening component is provided on the inner wall of the support plate, and an ejection component is provided on the inner wall of the lower pressing block;

[0006] The cooling and demoulding assembly includes a connecting plate and a piston cylinder. The side wall of the connecting plate is fixedly connected to the side wall of the lower pressure block. A connecting rod is fixedly installed on the lower surface of the connecting plate. A lifting rack is fixedly installed on the lower surface of the connecting rod. One end of the lifting rack extends to the inside of the operating table.

[0007] As a further description of the above technical solution:

[0008] The side wall of the piston cylinder is fixedly connected to the inner wall of the operating table, a piston plate is slidably installed on the inner wall of the piston cylinder, a fixing rod is fixedly installed on the side wall of the piston plate, one end of the fixing rod extends to the outside of the piston cylinder, and a threaded sleeve is fixedly installed on the lower surface of the fixing rod.

[0009] As a further description of the above technical solution:

[0010] A threaded rod is threadedly installed on the inner wall of the threaded sleeve, and the two ends of the threaded rod are rotatably connected to the inner walls of both sides of the operating table. A transmission gear is fixedly installed on the outer surface of the threaded rod, and the transmission gear is meshed with the lifting rack. An air outlet pipe is installed on the upper surface of the piston cylinder.

[0011] As a further description of the above technical solution:

[0012] One end of the air outlet pipe extends to the outside of the upper surface of the operating table, the lower surface of the piston cylinder is connected to an air inlet pipe, one end of the air inlet pipe extends to the outside of the side wall of the operating table, and one-way valves are fixedly installed on the inner walls of the air outlet pipe and the air inlet pipe.

[0013] As a further description of the above technical solution:

[0014] A sliding rod is fixedly installed on the upper surface of the fixed rod, one end of the sliding rod extends to the inside of the fixed block, a telescopic spring is fixedly installed on the inner wall of the bottom surface of the fixed block, a lifting plate is fixedly installed on one end of the telescopic spring, the lower surface of the lifting plate is fitted with one end of the sliding rod, a convex block is fixedly installed on the lower surface of the lifting plate, and a top block is fixedly installed on the upper surface of the lifting plate, one end of the top block extends into the molding groove on the fixed block.

[0015] As a further description of the above technical solution:

[0016] The loosening assembly includes a moving rod, one end of which extends to the inside of the support plate, one end of which is fixedly installed with a limit plate, a side wall of the limit plate is fixedly installed with a return spring, and one end of the return spring is fixedly connected to the inner side wall of the support plate.

[0017] As a further description of the above technical solution:

[0018] The other end of the moving rod is fixedly mounted with an impact block, one end of the impact block is in contact with the side wall of the fixed block, and a mounting plate is fixedly mounted on the side wall of the moving rod.

[0019] As a further description of the above technical solution:

[0020] A mounting frame is fixedly installed on the lower surface of the mounting plate, a movable rod is rotatably installed on the inner wall of the mounting frame through a rotating shaft, a limiting spring is fixedly installed on the upper surface of the movable rod, one end of the limiting spring is fixedly connected to the lower surface of the mounting plate, a driving block is fixedly installed on the side wall of the connecting rod, and the driving block and the movable rod are adapted to each other.

[0021] As a further description of the above technical solution:

[0022] The ejection assembly comprises a mounting groove, which is arranged inside the lower pressing block. A connecting spring is fixedly installed on the inner wall of the bottom surface of the mounting groove, and a movable plate is fixedly installed on one end of the connecting spring.

[0023] As a further description of the above technical solution:

[0024] A pressure rod is fixedly installed on the upper surface of the movable plate, one end of which extends to the outside of the lower surface of the lower pressing block; a push rod is fixedly installed on the upper surface of the movable plate, one end of which extends to the forming groove on the lower pressing block.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. In the present invention, a cooling and demoulding component is provided. When the lower pressing block descends, it drives the connecting rod to descend through the connecting plate. At this time, the connecting rod drives the lifting rack to move into the operating table. The threaded rod rotates under the action of the transmission gear. Under the action of the outer surface thread, the threaded sleeve drives the fixed rod to move in the direction of the transmission gear. At this time, the fixed rod drives the piston plate to move. Nitrogen is sucked into the piston cylinder under the action of the intake pipe. After the electric bicycle shaft is formed, the hydraulic rod drives the lower pressing block to move upward. When moving upward, the threaded rod rotates in the opposite direction. The threaded sleeve drives the piston plate to move to the other side of the transmission gear through the fixed rod to squeeze the gas in the piston cylinder. When the molded part is molded, the gas is blown into the molding grooves on the rotating shaft and the fixed block through the air outlet pipe. The fixed rod drives the sliding rod to move when it moves. As the sliding rod moves, when it encounters a bump, the lifting plate is pushed upward. The lifting plate drives the top block to lift the rotating shaft, and nitrogen is automatically sprayed on the molded rotating shaft, which not only cools the rotating shaft, but also cools the fixed block. The rotating shaft is lifted while cooling, which makes it easier to remove the rotating shaft and improves the working efficiency of the molding device. On the other hand, it cools the molding device and increases its service life, avoiding deformation due to excessive temperature after the use time increases, which causes a decrease in the subsequent rotating shaft accuracy.

[0027] 2. In the present invention, a loosening component is provided, and when the connecting rod descends, it will drive the driving block to descend synchronously. When the driving block descends, it will squeeze the movable rod. Since there is no obstacle when the movable rod rotates downward, the movable rod will not move. When the connecting rod drives the driving block to move upward, the movable rod will rotate upward. Since the upward rotation will be blocked by the mounting plate, the movable rod will move toward the direction of the support plate as the driving block moves upward, thereby driving the movable rod to move into the support plate. When the movable rod loses the action of the driving block, the reset spring will restore the movable rod to its original position. At this time, the movable rod drives the impact block to impact the fixed block. The impacted fixed block will vibrate and automatically impact the fixed block, thereby increasing the looseness of the rotating shaft in the fixed block, increasing the convenience of taking the rotating shaft, and thereby increasing the working rate of the forming device.

[0028] 3. In the present invention, by providing an ejection assembly, the ejector rod will move into the installation groove when the lower pressing block is in contact with the fixed block, thereby driving the movable plate to move into the installation groove and causing the ejector rod to retract into the installation groove. At this time, the connecting spring is in a compressed state. After the rotating shaft is formed, when the lower pressing block moves upward, under the action of the connecting spring, the movable plate drives the ejector rod and the pressure rod to return to their original positions. At this time, the ejector rod will eject the rotating shaft from the molding groove on the lower pressing block, and then remove the rotating shaft of the electric bicycle, effectively avoiding the situation where the rotating shaft is lifted up by the lower pressing block and then falls, causing damage to the rotating shaft. This not only improves the molding quality of the molding device, but also improves the safety of the molding device, avoiding injuries to workers caused by the falling of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of a molding device for producing a combined electric bicycle shaft.

[0030] Figure 2 The figure is a schematic diagram of the internal structure of a molding device for producing a combined electric bicycle shaft.

[0031] Figure 3 A molding device for producing a combined electric bicycle shaft Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0032] Figure 4 The figure is a schematic diagram of the exploded structure of loose components in a molding device for producing a combined electric bicycle shaft.

[0033] Figure 5 A molding device for producing a combined electric bicycle shaft Figure 4 Schematic diagram of the enlarged structure at point B in the middle.

[0034] Figure 6 The schematic diagram is a decomposed structure of a lower pressing block in a forming device for producing a combined electric bicycle shaft.

[0035] Figure 7 The present invention is a three-dimensional structural schematic diagram of a connecting rod and a lifting rack in a molding device for producing a combined electric bicycle shaft.

[0036] Legend:

[0037] 1. Operating table; 2. Support plate; 3. Fixed plate; 4. Hydraulic rod; 5. Fixed block; 6. Forming groove; 7. Cooling demoulding assembly; 71. Connecting plate; 72. Connecting rod; 73. Piston cylinder; 74. Piston plate; 75. Fixed rod; 76. Threaded sleeve; 77. Air outlet pipe; 78. Telescopic spring; 79. Lifting plate; 710. Bump; 711. Top block; 712. Lifting rack; 713. Threaded rod; 71 4. Transmission gear; 715. Intake pipe; 716. Sliding rod; 8. Loose assembly; 81. Moving rod; 82. Limiting plate; 83. Reset spring; 84. Impact block; 85. Mounting plate; 86. Mounting frame; 87. Movable rod; 88. Limiting spring; 9. Ejection assembly; 91. Mounting groove; 92. Connecting spring; 93. Movable plate; 94. Pressing rod; 95. Ejector rod; 10. Lower pressing block; 11. Driving block. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-7 The present invention provides a technical solution: a combined electric bicycle shaft production forming device, comprising an operating table 1, a support plate 2 is fixedly installed on the upper surface of the operating table 1, a fixing plate 3 is fixedly installed on the upper surface of the supporting plate 2, a hydraulic rod 4 is fixedly installed on the upper surface of the fixing plate 3, one end of the hydraulic rod 4 extends to the outside of the lower surface of the fixing plate 3 and is fixedly installed with a lower pressing block 10, a fixing block 5 is fixedly installed on the upper surface of the operating table 1, and a forming groove 6 is provided on the upper surface of the fixing block 5 and the lower surface of the lower pressing block 10, a cooling demoulding component 7 is provided on the inner wall of the operating table 1, a loosening component 8 is provided on the inner wall of the supporting plate 2, and an ejection component 9 is provided on the inner wall of the lower pressing block 10;

[0040] The cooling demoulding assembly 7 includes a connecting plate 71 and a piston cylinder 73. The side wall of the connecting plate 71 is fixedly connected to the side wall of the lower pressing block 10. A connecting rod 72 is fixedly installed on the lower surface of the connecting plate 71. A lifting rack 712 is fixedly installed on the lower surface of the connecting rod 72. One end of the lifting rack 712 extends to the inside of the operating table 1. The side wall of the piston cylinder 73 is fixedly connected to the inner side wall of the operating table 1. A piston plate 74 is slidably installed on the inner wall of the piston cylinder 73. A fixing rod 75 is fixedly installed on the side wall of the piston plate 74. One end of the fixing rod 75 extends to the outside of the piston cylinder 73. A threaded sleeve 76 is fixedly installed on the lower surface of the fixing rod 75. A threaded rod 713 is threadedly installed on the inner wall of the threaded sleeve 76. Two ends of the threaded rod 713 are rotatably connected to the inner walls of both sides of the operating table 1 respectively. A transmission gear 714 is fixedly installed on the outer surface of the threaded rod 713. The transmission gear 714 is connected to the lifting rack 712. The lower rack 712 is meshed and connected, and the upper surface of the piston cylinder 73 is connected to an air outlet pipe 77, one end of the air outlet pipe 77 extends to the outside of the upper surface of the operating table 1, and the lower surface of the piston cylinder 73 is connected to an air inlet pipe 715, one end of the air inlet pipe 715 extends to the outside of the side wall of the operating table 1. A one-way valve is fixedly installed on the inner walls of the air outlet pipe 77 and the air inlet pipe 715, and a sliding rod 716 is fixedly installed on the upper surface of the fixing rod 75, one end of the sliding rod 716 extends to the inside of the fixing block 5, and a telescopic spring 78 is fixedly installed on the inner wall of the bottom surface of the fixing block 5, and a lifting plate 79 is fixedly installed on one end of the telescopic spring 78, and the lower surface of the lifting plate 79 is fitted with one end of the sliding rod 716, and a protrusion 710 is fixedly installed on the lower surface of the lifting plate 79, and a top block 711 is fixedly installed on the upper surface of the lifting plate 79, and one end of the top block 711 extends to the molding groove 6 on the fixing block 5.

[0041] The specific embodiment is as follows: the forming block is placed on the upper surface of the fixed block 5, and the hydraulic rod 4 drives the lower pressing block 10 to descend. Under the action of the lower pressing block 10, the forming block is squeezed. At this time, the forming block is embedded in the forming groove 6 after the shape of the forming groove 6 is changed. When the lower pressing block 10 descends, it drives the connecting rod 72 to descend through the connecting plate 71. At this time, the connecting rod 72 drives the lifting rack 712 to move into the operating table 1. Under the action of the transmission gear 714, the threaded rod 713 rotates. Under the action of the outer surface thread, the threaded sleeve 76 drives the fixed rod 75 to move in the direction of the transmission gear 714. At this time, the fixed rod 75 drives the piston plate 74 to move. Under the action of the air inlet pipe 715, nitrogen is sucked into the piston cylinder 73. After the electric bicycle shaft is formed, the hydraulic rod 4 drives the lower pressing block 10 to move upward. When moving upward, the threaded rod 713 rotates in the opposite direction. The threaded sleeve 76 drives the piston plate 74 to move to the other side of the transmission gear 714 through the fixed rod 75, and squeezes the gas in the piston cylinder 73. At this time, the gas is blown into the forming groove 6 on the shaft and the fixed block 5 through the air outlet pipe 77. When the fixed rod 75 moves, it will drive the sliding rod 716 to move. As the sliding rod 716 moves, when it encounters the protrusion 710, it will push the lifting plate 79 upward, and the lifting plate 79 drives the top block 711 to lift the shaft.

[0042] The loosening assembly 8 includes a moving rod 81, one end of which extends to the interior of the support plate 2, one end of which is fixedly installed with a limiting plate 82, and a return spring 83 is fixedly installed on the side wall of the limiting plate 82, one end of the return spring 83 is fixedly connected to the inner side wall of the support plate 2, and the other end of the moving rod 81 is fixedly installed with an impact block 84, one end of the impact block 84 is in contact with the side wall of the fixed block 5, a mounting plate 85 is fixedly installed on the side wall of the moving rod 81, a mounting frame 86 is fixedly installed on the lower surface of the mounting plate 85, and a movable rod 87 is rotatably installed on the inner wall of the mounting frame 86 through a rotating shaft, a limiting spring 88 is fixedly installed on the upper surface of the movable rod 87, one end of the limiting spring 88 is fixedly connected to the lower surface of the mounting plate 85, and a driving block 11 is fixedly installed on the side wall of the connecting rod 72, and the driving block 11 and the movable rod 87 are adapted to each other.

[0043] The specific implementation is as follows: when the connecting rod 72 descends, it will drive the driving block 11 to descend synchronously. When the driving block 11 descends, it will squeeze the movable rod 87. Since there is no obstacle when the movable rod 87 rotates downward, the movable rod 81 will not move. When the connecting rod 72 drives the driving block 11 to move upward, the movable rod 87 will rotate upward. Since the upward rotation will be blocked by the mounting plate 85, the movable rod 87 will move toward the support plate 2 as the driving block 11 moves upward, thereby driving the movable rod 81 to move into the support plate 2. When the movable rod 87 loses the action of the driving block 11, the reset spring 83 will restore the movable rod 81 to its original position. At this time, the movable rod 81 drives the impact block 84 to impact the fixed block 5, and the impacted fixed block 5 will vibrate.

[0044] The ejection assembly 9 includes a mounting groove 91, which is arranged inside the lower pressing block 10. A connecting spring 92 is fixedly installed on the inner wall of the bottom surface of the mounting groove 91, and a movable plate 93 is fixedly installed on one end of the connecting spring 92. A pressure rod 94 is fixedly installed on the upper surface of the movable plate 93, and one end of the pressure rod 94 extends to the outside of the lower surface of the lower pressing block 10. A push rod 95 is fixedly installed on the upper surface of the movable plate 93, and one end of the push rod 95 extends into the molding groove 6 on the lower pressing block 10.

[0045] The specific implementation example is as follows: when the lower pressing block 10 is in contact with the fixed block 5, the push rod 95 will move into the mounting groove 91, thereby driving the movable plate 93 to move into the mounting groove 91 and causing the push rod 95 to retract into the mounting groove 91. At this time, the connecting spring 92 is in a compressed state. After the rotating shaft is formed, when the lower pressing block 10 moves upward, under the action of the connecting spring 92, the movable plate 93 drives the push rod 95 and the pressure rod 94 to return to their original positions. At this time, the push rod 95 will push the rotating shaft out of the forming groove 6 on the lower pressing block 10, and then remove the rotating shaft of the electric bicycle.

[0046] Working principle: Place the forming block on the upper surface of the fixed block 5, and the hydraulic rod 4 drives the lower pressing block 10 to descend. Under the action of the lower pressing block 10, the forming block will be squeezed. At this time, the forming block will be embedded in the forming groove 6 after the shape of the forming groove 6 is changed. When the lower pressing block 10 descends, it will drive the connecting rod 72 to descend through the connecting plate 71. At this time, the connecting rod 72 drives the lifting rack 712 to move into the operating table 1. Under the action of the transmission gear 714, the threaded rod 713 rotates. Under the action of the outer surface thread, the threaded sleeve 76 drives the fixed rod 75 to move in the direction of the transmission gear 714. At this time, the fixed rod 75 drives the piston plate 74 to When the piston cylinder 73 is moved, nitrogen is sucked into the piston cylinder 73 under the action of the air inlet pipe 715. After the shaft of the electric bicycle is formed, the hydraulic rod 4 drives the pressing block 10 to move upward. When moving upward, the threaded rod 713 rotates in the opposite direction. The threaded sleeve 76 drives the piston plate 74 to move to the other side of the transmission gear 714 through the fixed rod 75, and squeezes the gas in the piston cylinder 73. At this time, the gas is blown into the forming groove 6 on the shaft and the fixed block 5 through the air outlet pipe 77. When the fixed rod 75 moves, it drives the sliding rod 716 to move. As the sliding rod 716 moves, when it encounters the protrusion 710, it will push the lifting plate 79 upward, and the lifting plate 79 drives the top block 71 1 lifts up the rotating shaft, and the connecting rod 72 will drive the driving block 11 to synchronously descend when it descends. When the driving block 11 descends, it will squeeze the movable rod 87. Since there is no obstacle when the movable rod 87 rotates downward, the moving rod 81 will not move. When the connecting rod 72 drives the driving block 11 to move upward, the movable rod 87 will rotate upward. Since the upward rotation will be blocked by the mounting plate 85, the movable rod 87 will move toward the direction of the support plate 2 as the driving block 11 moves upward, thereby driving the moving rod 81 to move into the supporting plate 2. When the movable rod 87 loses the action of the driving block 11, the reset spring 83 will make the movable rod 81 move. 1 is restored to its original position. At this time, the moving rod 81 drives the impact block 84 to impact the fixed block 5. The impacted fixed block 5 will vibrate. When the lower pressing block 10 is in contact with the fixed block 5, the push rod 95 will move into the installation groove 91, thereby driving the movable plate 93 to move into the installation groove 91 so that the push rod 95 is retracted into the installation groove 91. At this time, the connecting spring 92 is in a compressed state. After the shaft is formed, when the lower pressing block 10 moves up, under the action of the connecting spring 92, the movable plate 93 drives the push rod 95 and the pressure rod 94 to return to their original positions. At this time, the push rod 95 will push the shaft out of the forming groove 6 on the lower pressing block 10, and then the shaft of the electric bicycle can be removed.

[0047] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A combined electric bicycle shaft production molding device, comprising an operating table (1), Features: A support plate (2) is fixedly mounted on the upper surface of the operating table (1), a fixed plate (3) is fixedly mounted on the upper surface of the supporting plate (2), a hydraulic rod (4) is fixedly mounted on the upper surface of the fixed plate (3), one end of the hydraulic rod (4) extends to the outside of the lower surface of the fixed plate (3) and is fixedly mounted with a lower pressing block (10), a fixed block (5) is fixedly mounted on the upper surface of the operating table (1), a molding groove (6) is provided on the upper surface of the fixed block (5) and the lower surface of the lower pressing block (10), a cooling and demoulding component (7) is provided on the inner wall of the operating table (1), a loosening component (8) is provided on the inner wall of the supporting plate (2), and an ejection component (9) is provided on the inner wall of the lower pressing block (10); The cooling and demoulding assembly (7) comprises a connecting plate (71) and a piston cylinder (73); the side wall of the connecting plate (71) is fixedly connected to the side wall of the lower pressing block (10); a connecting rod (72) is fixedly mounted on the lower surface of the connecting plate (71); a lifting rack (712) is fixedly mounted on the lower surface of the connecting rod (72); one end of the lifting rack (712) extends into the interior of the operating table (1); The side wall of the piston cylinder (73) is fixedly connected to the inner wall of the operating table (1); a piston plate (74) is slidably mounted on the inner wall of the piston cylinder (73); a fixing rod (75) is fixedly mounted on the side wall of the piston plate (74); one end of the fixing rod (75) extends to the outside of the piston cylinder (73); a threaded sleeve (76) is fixedly mounted on the lower surface of the fixing rod (75); A threaded rod (713) is threadedly mounted on the inner wall of the threaded sleeve (76), and two ends of the threaded rod (713) are rotatably connected to the inner walls of the operating table (1) on both sides. A transmission gear (714) is fixedly mounted on the outer surface of the threaded rod (713), and the transmission gear (714) is meshedly connected to the lifting rack (712). An air outlet pipe (77) is connected and mounted on the upper surface of the piston cylinder (73); One end of the air outlet pipe (77) extends to the outside of the upper surface of the operating table (1); the lower surface of the piston cylinder (73) is connected to an air inlet pipe (715); one end of the air inlet pipe (715) extends to the outside of the side wall of the operating table (1); and one-way valves are fixedly installed on the inner walls of the air outlet pipe (77) and the air inlet pipe (715); A sliding rod (716) is fixedly mounted on the upper surface of the fixed rod (75), one end of the sliding rod (716) extends into the interior of the fixed block (5), a telescopic spring (78) is fixedly mounted on the inner wall of the bottom surface of the fixed block (5), one end of the telescopic spring (78) is fixedly mounted on a lifting plate (79), the lower surface of the lifting plate (79) is in contact with one end of the sliding rod (716), a convex block (710) is fixedly mounted on the lower surface of the lifting plate (79), and a top block (711) is fixedly mounted on the upper surface of the lifting plate (79), one end of the top block (711) extends into the molding groove (6) on the fixed block (5); The loosening assembly (8) comprises a moving rod (81), one end of the moving rod (81) extends into the interior of the support plate (2), one end of the moving rod (81) is fixedly mounted with a limit plate (82), a side wall of the limit plate (82) is fixedly mounted with a return spring (83), and one end of the return spring (83) is fixedly connected to the inner side wall of the support plate (2); A collision block (84) is fixedly mounted on the other end of the moving rod (81), one end of the collision block (84) is in contact with the side wall of the fixed block (5), and a mounting plate (85) is fixedly mounted on the side wall of the moving rod (81); A mounting frame (86) is fixedly mounted on the lower surface of the mounting plate (85); a movable rod (87) is rotatably mounted on the inner wall of the mounting frame (86) via a rotating shaft; a limit spring (88) is fixedly mounted on the upper surface of the movable rod (87); one end of the limit spring (88) is fixedly connected to the lower surface of the mounting plate (85); a driving block (11) is fixedly mounted on the side wall of the connecting rod (72); the driving block (11) and the movable rod (87) are adapted to each other; The ejection assembly (9) comprises a mounting groove (91), the mounting groove (91) being arranged inside the lower pressing block (10), a connecting spring (92) being fixedly mounted on the inner wall of the bottom surface of the mounting groove (91), and a movable plate (93) being fixedly mounted on one end of the connecting spring (92); A pressure rod (94) is fixedly mounted on the upper surface of the movable plate (93), one end of which extends to the outside of the lower surface of the lower pressing block (10); a push rod (95) is fixedly mounted on the upper surface of the movable plate (93), one end of which extends to the inside of the molding groove (6) on the lower pressing block (10).

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