A mobile phone back cover mold opening system

Abstract

The invention belongs to the field of mobile phone processing, and is a mold opening system for a mobile phone back shell. A mold opening system for a mobile phone back shell includes a housing. There is a feed inlet on the housing. There is an inner cavity inside the housing. A fixed platform is provided on the left side wall of the inner cavity. A third motor is fixedly arranged on the fixed platform. An output bevel gear is provided at the output end of the third motor. A thick rod column is provided on the upper surface of the inner cavity. A transport slide rail is provided on the lower surface of the inner cavity. A protruding platform is provided on the rear side wall of the inner cavity. After the mold opening mobile phone shell enters the grinding machine in the present invention, the excess burrs of the mobile phone back shell are ground by a grinding wheel. Driven by the mechanical mechanism, the grinding wheel moves in a rectangular route, which can accurately grind the mobile phone back shell. When the grinding wheel is worn out excessively, the grinding wheel is replaced to start to improve work efficiency. At the same time, a stopper is adopted to make the position of the replaced grinding wheel more accurate.

Description

Technical Field

[0001] The present invention belongs to the field of mobile phone processing, and in particular relates to a mold opening system for a mobile phone back shell. Background Art

[0002] As is well known, when die-casting the mold of a mobile phone back shell, due to the existence of minute gaps, excess material overflows into the gaps on the die-cast mobile phone back shell, and the produced back shell fails to achieve the ideal effect. Excessive defects will occur on the back shell. In most cases, sandpaper or a grinding wheel is used to grind the burrs generated during demolding. However, most of the existing grinding devices simply move the grinding wheel up and down to grind the mold. This has the problems that the grinding is incomplete or excessive grinding will over-grind the edges and corners of the mobile phone back shell, increasing the production cost as the molded back shell is scrapped. It is unable to precisely grind the mobile phone back shell, and the grinding wheel is easily worn during the grinding process. Replacing the grinding wheel in most grinding devices may sometimes waste a lot of unnecessary time, increasing the loss. It is time-consuming and laborious, greatly reducing the work efficiency and also increasing the labor cost. Summary of the Invention

[0003] The purpose of the present invention is to address the above problems existing in the prior art and propose a mold opening system for a mobile phone back shell. This mold opening system for a mobile phone back shell can precisely grind the demolded mobile phone back shell along a rectangular movement path when the mobile phone back shell is demolded.

[0004] The purpose of the present invention can be achieved by the following technical solutions: A mold opening system for a mobile phone back shell, including a housing, characterized in that the housing is provided with a feed inlet, the housing is provided with an inner cavity, a fixed platform is provided on the left side wall of the inner cavity, a third motor is fixedly provided on the fixed platform, an output bevel gear is provided at the output end of the third motor, a thick rod column is provided on the upper surface of the inner cavity, a transport slide rail is provided on the lower surface of the inner cavity, a protruding platform is provided on the rear side wall of the inner cavity, a platform rotating shaft is rotatably provided in the through hole of the protruding platform, an irregular pulley is rotatably provided at the lower end of the platform rotating shaft, a main platform is fixedly provided at the upper end of the platform rotating shaft, a return spring is provided outside the main platform, and the end of the return spring is fixed on the housing. A fixed thick rod is provided on the main platform, a first motor is fixedly provided at the upper right of the main platform, a long rotating shaft is provided at the output end of the first motor, the long rotating shaft rotates through the through hole on the fixed thick rod, two large rotating wheels are fixedly provided on the long rotating shaft, a feed inlet is provided on the lower surface of the inner cavity, two fixed blocks are provided on the lower surface of the inner cavity, and a grinding device is provided in the inner cavity. The grinding device is used to grind the burrs and excess material on the demolded mobile phone back cover.

[0005] Preferably, the grinding device includes a platform chute provided on the main platform, an L-shaped platform slidably provided in the platform chute, a vertical chute provided on the L-shaped platform, a horizontal slide provided slidably in the vertical chute, a horizontal chute provided on the horizontal slide, a slider slidably provided in the horizontal chute, a connecting rod hinged on the slider, a swinging rod hinged on the connecting rod, a square block hinged at the end of the swinging rod through a rod, the square block being fixed on the main platform, an upper pulley rotatably provided at the end of the connecting rod, and a sector chute provided on the large runner.

[0006] Preferably, the upper pulley and the sector chute are both in sliding transmission. Two fixed columns are fixedly provided on the horizontal slide. An L-shaped moving frame is provided on the fixed columns. A cavity is provided inside the right side of the L-shaped moving frame. A second motor is fixedly provided above the right side of the L-shaped moving frame. The output end of the second motor extends into the cavity. An input gear is provided at the output end of the second motor. An output grinding shaft is slidably provided in the cavity. An external tooth sliding ring is fixedly provided at the upper end of the output grinding shaft. The external tooth sliding ring and the input gear are meshed by teeth. A receiving spring is fixedly provided on the output grinding shaft.

[0007] Preferably, the upper end of the receiving spring is fixed on the L-shaped moving frame. A protruding round rod is fixedly provided at the lower end of the output grinding shaft. A grinding wheel is slidably provided on the protruding round rod. A replacement chute is provided on the grinding wheel. The protruding round rod slides in the replacement chute. Contact balls are provided on the side wall of the replacement chute. The protruding round rod abuts against the contact balls. A lower pulley is slidably provided in a groove on the right side wall of the L-shaped platform. An intermediate rod is rotatably provided on the lower pulley. An angle rod is fixedly provided on the intermediate rod. A right side wheel rod is fixedly provided on the angle rod. A fixed thin rod is provided on the main platform. The right side wheel rod rotates in a through hole on the fixed thin rod. The right end of the right side wheel rod is rotatably connected to the right end of the upper pulley. A replacement device is provided on the left side of the inner cavity for the function of replacing the grinding wheel worn by grinding.

[0008] Preferably, the replacement device includes a secondary rotating shaft (47) rotatably provided on a fixed block (49) provided on the left side. A C-shaped rotating block is fixedly provided at the lower end of the secondary rotating shaft. An input turntable is fixedly provided on the secondary rotating shaft. A transmission rotating shaft is rotatably provided at the end of the input turntable. A transmission gear is fixedly provided at the upper end of the transmission rotating shaft. An intermediate turntable is fixedly provided at the lower end of the transmission rotating shaft. An output shaft is fixedly provided at the end of the intermediate turntable. An elastic pulley is rotatably provided at the lower end of the output shaft. Array rods are fixedly provided in an annular array on the secondary rotating shaft. An external tooth transmission ring is fixedly provided at the lower end of the array rods. The transmission gear and the external tooth transmission ring are meshed by teeth. A large belt pulley is fixedly provided on the secondary rotating shaft. A belt is provided on the large belt pulley.

[0009] Preferably, the other end of the belt is connected to the irregular pulley, and an input bevel gear is fixedly provided on the upper end of the secondary shaft, and the input bevel gear is meshed with the output bevel gear. An input shaft is rotatably provided on the fixed block on the right, and a replacement platform is fixedly provided on the input shaft. A protruding column is fixedly provided in an annular array on the replacement platform, and an array hole is provided in the annular array on the replacement platform. The side grooves in the array holes are all provided with hook claws through rod hinges, and the ends of the hook claws are slidably provided with rod sleeves. A stopping device is provided on the upper side of the inner cavity, and the stopping device is used to fix the bracket to prevent rebound and ensure accurate replacement positioning.

[0010] Preferably, the stopping device includes a groove provided in the thick rod column, a blocking block is slidably provided in the groove, a locking spring is provided on the blocking block, a C-shaped cavity is provided on the blocking block, a fixing pin is fixedly provided on the inner wall of the C-shaped cavity, an L-shaped rotating rod is hingedly provided on the fixing pin, a spring is fixedly provided in the blocking block, an electromagnetic block is fixedly provided on the left end of the spring, a magnetic rod is slidably provided on the spring, and the electromagnetic block is connected to the magnetic rod via a small spring.

[0011] When the mold opening and polishing device is working, the back shell of the mobile phone mold enters from the feed port and is transmitted through the transport slide rail. Motor No. 1 starts to be powered on and rotates, the long rotating shaft fixed at the output end rotates, and the left and right large rotating wheels fixed on the long rotating shaft start to rotate. The fan-shaped slide grooves opened on the inner walls of the large rotating wheels all rotate, and the upper pulleys in the left and right fan-shaped slide grooves all start to move along the trajectory of the fan-shaped slide grooves. The connecting rod connected to the upper pulley at the left end moves in a fan-shaped trajectory, and the swing rod hinged to the connecting rod begins to swing up and down at a small angle because one end is hinged by a square block. The sliding block hinged to the end of the connecting rod slides left and right in the horizontal slide groove opened on the horizontal slide, and the horizontal slide slides up and down in the vertical slide groove opened on the L-shaped platform.

[0012] When the slider moves, it drives the L-shaped platform up and down. Since the fixed column is fixed on the L-shaped platform, the L-shaped motion frame sleeved on the fixed column begins to move up and down with the L-shaped platform, and the right-side wheel rod connected to the upper pulley on the right end also begins to move in a fan-shaped trajectory, driving the angle rod fixed on the right wheel rod to swing with a small displacement. The angle rod drives the middle rod and the lower pulley rotatably connected to the middle rod to move up and down in the right wall groove. As the angle rod swings, the L-shaped platform is displaced in the vertical direction on the horizontal plane of the platform slide groove. The L-shaped motion frame moves in a rectangular route in the vertical plane, and the No. 2 motor on the upper right side of the L-shaped motion frame starts to be energized. The input gear at the output end drives the grinding wheel to rotate and grind the back cover of the mobile phone through the meshing transmission with the outer tooth sliding ring.

[0013] When the grinding wheel becomes blunt during the gradual grinding process, the No. 3 motor fixed on the fixed platform is powered on and starts to rotate counterclockwise. The output end output bevel gear starts to rotate and drives the input bevel gear to rotate through the meshing of the teeth with the input bevel gear. Then the secondary rotating shaft fixed to the input bevel gear starts to rotate counterclockwise, and the large pulley fixed on the secondary rotating shaft rotates counterclockwise. The large pulley drives the belt to rotate counterclockwise, and the irregular pulley at the other end of the belt starts to rotate counterclockwise. The irregular pulley drives the main platform to rotate clockwise through the meshing with the irregular teeth at the end of the platform rotating shaft, and the return spring fixed on the main platform starts to stretch.

[0014] During the clockwise rotation of the L-shaped moving frame, it contacts the L-shaped rotating rod. Then the L-shaped rotating rod rotates counterclockwise until the L-shaped moving frame is completely inside the C-shaped cavity. At this time, the No. 3 motor starts to rotate clockwise, and the secondary rotating shaft starts to rotate clockwise. The connected belt drives the irregular pulley at the other end to also start to rotate clockwise. Since the irregular pulley does not have meshing transmission with the irregular teeth of the platform rotating shaft in the clockwise direction, the return spring starts to act in the rebounding force and starts to act on the main platform counterclockwise. However, since the L-shaped moving frame is in the C-shaped cavity through the L-shaped rotating rod, when the L-shaped moving frame rotates counterclockwise, it forces the L-shaped rotating rod to rotate clockwise. Since the lower end of the L-shaped rotating rod presses on the magnetic rod and gets stuck, the rebounding of the return spring stops, and the positioning process ends. At this time, the No. 1 motor is powered on to make the L-shaped moving frame in the descending stage of the rectangular movement route, and the L-shaped moving frame presses on the lower end of the C-shaped cavity to pull the block downward and compress the positioning spring.

[0015] When the grinding wheel presses on the rod sleeve, the No. 1 motor is powered off. The output grinding shaft compresses the receiving spring so that the input gear and the outer tooth sliding ring are in full contact and meshing. Since the rod sleeve is pressed, the hook claw moves clockwise towards the center, and the included angle of the hook claw catches the grinding wheel. At this time, the No. 2 motor starts to rotate, and the output grinding shaft starts to rotate clockwise. Since the grinding wheel is stuck, the protruding round rod compresses the contact ball along the replacement chute to separate the output grinding shaft from the grinding wheel, and the No. 2 motor stops. After the No. 1 motor is powered on to make the L-shaped moving frame in the ascending stage of the rectangular route and then the No. 1 motor is powered off, since the secondary rotating shaft rotates, the array rod fixed on the secondary rotating shaft drives the outer tooth transmission ring fixed on the array rod to start to rotate. The transmission gear meshing with the outer tooth transmission ring through the over-tooth rotates, driving the intermediate turntable to rotate, and the output shaft located on the intermediate turntable starts to rotate, and the C-shaped rotating block also starts to rotate.

[0016] When the output shaft rotates to the middle of a pair of protruding columns, the elastic pulley at the lower end of the output shaft starts to squeeze the protruding columns. At this time, the notch of the C-shaped rotating block will contact the protruding edge of the replacement platform. Under the combined action of the two, the replacement platform is forced to rotate by a certain angle, and then the output bevel gear stops. After the No. 1 motor is energized and the L-shaped moving frame descends along the rectangular path and presses into the new replacement chute opening, the L-shaped moving frame is de-energized. When the No. 2 motor is energized and rotates counterclockwise, the output grinding shaft rotates counterclockwise to squeeze the contact ball. After reaching the bottom of the replacement chute, the No. 2 motor is de-energized. When the No. 1 motor is energized and the L-shaped moving frame is in the rectangular rising stage and then de-energized, at this time, the electromagnet starts to be energized to compress the spring and pull the magnetic rod to the left. Then, under the pressure of the L-shaped moving frame, the L-shaped rotating rod rotates to the horizontal position through the arc-shaped groove. The L-shaped moving frame returns to its original position along with the main platform under the action of the rebound of the return spring. The electromagnet is de-energized and the magnetic rod extends to the right, forcing the L-shaped rotating rod to return to its original position counterclockwise, and the replacement process ends.

[0017] Compared with the prior art, the mobile phone back shell mold opening system has the following advantages:

[0018] 1. During the grinding process of the grinding device, the grinding wheel adopts a rectangular movement path and grinds the mobile phone back shell with its long side. One cycle is completed for grinding one mobile phone back shell, and the mobile phone back shell is accurately ground, avoiding losses caused by over-grinding.

[0019] 2. When replacing the worn grinding wheel, there is no need for manual replacement. The grinding device automatically replaces the grinding wheel, which improves the mechanical working duration and replacement speed, avoids wasting extra time, increases the profit, and improves the efficiency of grinding the mobile phone back shell.

[0020] 3. The positioning mechanical mechanism adopted during the process of replacing the grinding wheel accurately replaces it, improves the stability of the grinding device, and reduces the repair rate. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the mobile phone back shell mold opening system.

[0022] Figure 2 is Figure 1 a cross-sectional view taken along the A-A direction in

[0023] Figure 3 is Figure 2 a cross-sectional view taken along the B-B direction in

[0024] Figure 4 is Figure 3 a cross-sectional view taken along the C-C direction in

[0025] Figure 5 is Figure 3 a cross-sectional view taken along the D-D direction in

[0026] Figure 6 is Figure 5Cross-sectional view along EE direction.

[0027] Figure 7 yes Figure 5 Enlarged view of the structure at F in the middle.

[0028] Figure 8 yes Figure 3 Enlarged view of the structure at G in the middle.

[0029] Figure 9 yes Figure 3 Enlarged view of the structure at H in the middle.

[0030] In the figure, 10, housing; 11, transport slide rail; 12, protruding platform; 13, No. 3 motor; 14, fixed platform; 15, output bevel gear; 16, input bevel gear; 17, external gear transmission ring; 18, transmission gear; 19, input turntable; 20, transmission shaft; 21, large pulley; 22, C-type rotating block; 23, array rod; 24, hook; 25, rod sleeve; 26, protruding column; 28, array hole ; 29, input shaft; 30, belt; 31, square block; 32, swing rod; 33, motor No. 1; 34, fixed thick rod; 35, large wheel; 36, platform shaft; 37, long shaft; 38, fixed thin rod; 39, right wheel rod; 40, angle rod; 41, middle rod; 42, platform slide; 43, L-shaped motion frame; 44, motor No. 2; 45, grinding wheel; 46, inner cavity; 47, vice Rotating shaft; 48, replacement platform; 49, fixed block; 50, feed port; 51, thick rod column; 52, positioning spring; 53, block; 54, L-shaped platform; 55, main platform; 56, reset spring; 57, irregular pulley; 58, fan-shaped slide; 59, upper pulley; 60, replacement slide; 61, fixed column; 62, intermediate turntable; 63, output shaft; 64, elastic pulley; 65, horizontal slide; 6 6. Connecting rod; 67. Vertical slide; 68. Horizontal slide; 69. Main shaft; 70. Input gear; 71. External gear sliding ring; 72. Support spring; 73. Output grinding shaft; 74. L-shaped rotating rod; 75. C-shaped cavity; 76. Sliding block; 78. Fixing pin; 79. Electromagnetic block; 80. Spring; 81. Magnetic rod; 82. Protruding round rod; 83. Contact ball; 84. Cavity; 85. Lower pulley. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figure 1As shown in the figure, a mold opening system for a mobile phone back cover includes a housing 10. There is a feed inlet 50 on the housing 10. There is an inner cavity 46 inside the housing 10. There is a fixed platform 14 on the left side wall of the inner cavity 46. A third motor 13 is fixedly arranged on the fixed platform 14. An output bevel gear 15 is arranged at the output end of the third motor 13. A thick rod column 51 is arranged on the upper surface of the inner cavity 46. A transport slide rail 11 is arranged on the lower surface of the inner cavity 46. A protruding platform 12 is arranged on the rear side wall of the inner cavity 46. A platform rotating shaft 36 is rotatably arranged in the through hole of the protruding platform 12. An irregular pulley 57 is rotatably arranged at the lower end of the platform rotating shaft 36. A main platform 55 is fixedly arranged at the upper end of the platform rotating shaft 36. A return spring 56 is arranged outside the main platform 55. The end of the return spring 56 is fixed on the housing 10. A fixed thick rod 34 is arranged on the main platform 55. A first motor 33 is fixedly arranged at the upper right of the main platform 55. A long rotating shaft 37 is arranged at the output end of the first motor 33. The long rotating shaft 37 rotates through the through hole on the fixed thick rod 34. Two large rotating wheels 35 are fixedly arranged on the long rotating shaft 37. There is a feed inlet 50 on the lower surface of the inner cavity 46. Two fixing blocks 49 are arranged on the lower surface of the inner cavity 46. A polishing device is arranged inside the inner cavity 46. The polishing device is used to polish the burrs and excess materials on the mold-opened mobile phone back cover.

[0033] As Figure 1 , Figure 3 and Figure 4 shown, the polishing device includes a platform chute 42 arranged on the main platform 55. An L-shaped platform 54 is slidably arranged in the platform chute 42. A vertical chute 67 is arranged on the L-shaped platform 54. A horizontal slide 65 is slidably arranged in the vertical chute 67. A horizontal chute 68 is arranged on the horizontal slide 65. A slider 76 is slidably arranged in the horizontal chute 68. A connecting rod 66 is hinged on the slider 76. A swinging rod 32 is hinged on the connecting rod 66. The end of the swinging rod 32 is hinged with a square block 31 through a rod. The square block 31 is fixed on the main platform 55. An upper pulley 59 is rotatably arranged at the end of the connecting rod 66. Sector chutes 58 are arranged on both of the large rotating wheels 35.

[0034] As Figure 1 , Figure 4 , Figure 5 and Figure 7 shown, the upper pulley 59 and the sector chute 58 are both in sliding transmission. Two fixing columns 61 are fixed on the horizontal slide 65. An L-shaped moving frame 43 is arranged on the fixing columns 61. There is a cavity 84 inside the right side of the L-shaped moving frame 43. A second motor 44 is fixedly arranged at the upper right of the L-shaped moving frame 43. The output end of the second motor 44 extends into the cavity 84. An input gear 70 is arranged at the output end of the second motor 44. An output polishing shaft 73 is slidably arranged in the cavity 84. An external tooth sliding ring 71 is fixedly arranged at the upper end of the output polishing shaft 73. The external tooth sliding ring 71 is meshed with the input gear 70 through teeth. A receiving spring 72 is fixed on the output polishing shaft 73.

[0035] AsFigure 1 , Figure 5 and Figure 9 As shown, the upper end of the receiving spring 72 is fixed on the L-shaped motion frame 43, and the lower end of the output grinding shaft 73 is fixedly provided with a protruding round rod 82, and the protruding round rod 82 is slidably provided with a grinding wheel 45, and a replacement slide groove 60 is provided on the grinding wheel 45, and the protruding round rod 82 slides in the replacement slide groove 60, and a contact ball 83 is provided on the side wall of the replacement slide groove 60, and the protruding round rod 82 abuts against the contact ball 83. A lower pulley 85 is slidably provided in the right wall groove of the L-shaped platform 54, and the lower pulley 85 is rotatably provided with an intermediate rod 41, and the intermediate rod 41 is fixedly provided with an angle rod 40, and the angle rod 40 is fixedly provided with a right side wheel rod 39, and a fixed thin rod 38 is provided on the main platform 55, and the right side wheel rod 39 rotates in the through hole on the fixed thin rod 38, and the right end of the right side wheel rod 39 is rotatably connected with the right end of the upper pulley 59, and a replacement device is provided on the left side of the inner cavity 46, and the replacement device is used to replace the grinding wheel worn due to grinding.

[0036] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the replacement device includes an auxiliary shaft 47 rotatably arranged on a fixed block 49 on the left side, a C-shaped rotating block 22 is fixedly arranged at the lower end of the auxiliary shaft 47, an input turntable 19 is fixedly arranged on the auxiliary shaft 47, a transmission shaft 20 is rotatably arranged at the end of the input turntable 19, a transmission gear 18 is fixedly arranged at the upper end of the transmission shaft 20, an intermediate turntable 62 is fixedly arranged at the lower end of the transmission shaft 20, an output shaft 63 is fixedly arranged at the end of the intermediate turntable 62, an elastic pulley 64 is rotatably arranged at the lower end of the output shaft 63, an array rod 23 is fixedly arranged in a ring array on the auxiliary shaft 47, an outer gear transmission ring 17 is fixedly arranged at the lower end of the array rod 23, the transmission gear 18 is meshed with the outer gear transmission ring 17 through teeth, a large pulley 21 is fixedly arranged on the auxiliary shaft 47, and a belt 30 is arranged on the large pulley 21.

[0037] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the other end of the belt 30 is connected to the irregular pulley 57, the upper end of the secondary shaft 47 is fixedly provided with an input bevel gear 16, the input bevel gear 16 is meshed with the output bevel gear 15, an input shaft 29 is rotatably provided on the right fixed block 49, a replacement platform 48 is fixedly provided on the input shaft 29, a protruding column 26 is fixedly provided in an annular array on the replacement platform 48, an array hole 28 is provided in an annular array on the replacement platform 48, the side grooves in the array hole 28 are all provided with hook claws 24 through rod hinges, the ends of the hook claws 24 are all slidably provided with rod sleeves 25, a stopper is provided on the upper side of the inner cavity 46, the stopper is used to fix the bracket to prevent rebound and ensure accurate replacement positioning.

[0038] like Figure 1 ,Figure 3 , Figure 8 and Figure 9 As shown in Figure 3 , Figure 8 and Figure 9 , the stop device includes a thick rod column 51 with a groove inside. A clamping block 53 is slidably arranged in the groove. A clamping spring 52 is arranged on the clamping block 53. A C-shaped cavity 75 is arranged on the clamping block 53. A fixed pin 78 is fixedly arranged on the inner wall of the C-shaped cavity 75. An L-shaped rotating rod 74 is hinged to the fixed pin 78. A spring 80 is fixedly arranged in the clamping block 53. An electromagnetic block 79 is fixedly arranged at the left end of the spring 80. A magnetic rod 81 is slidably arranged on the spring 80. The electromagnetic block 79 and the magnetic rod 81 are connected by a small spring.

[0039] When the mold opening and grinding device works, the rear shell of the mobile phone for mold opening enters from the feed port 50 and is conveyed through the transport slide rail 11. The first motor 33 starts to be energized and rotate. The long rotating shaft 37 at the fixed output end rotates. The left and right large rotating wheels 35 fixed on the long rotating shaft 37 start to rotate. The fan-shaped chutes 58 opened on the inner walls of the large rotating wheels 35 all rotate. Then the upper pulleys 59 in the left and right fan-shaped chutes 58 all start to move along the trajectory of the fan-shaped chutes 58. The connecting rod 66 connected to the left upper pulley 59 makes a fan-shaped trajectory displacement. The swing rod 32 hinged to the connecting rod 66 starts to make a small-angle up and down swing because one end is hinged by the square block 31. The slider 76 hinged to the end of the connecting rod 66 slides left and right in the horizontal chute 68 opened on the horizontal slide 65. And the horizontal slide 65 slides up and down in the vertical chute 67 opened on the L-shaped platform 54.

[0040] Then when the slider 76 moves, it drives the L-shaped platform 54 to move up and down. Since the fixed column 61 is fixed on the L-shaped platform 54, the L-shaped moving frame 43 sleeved on the fixed column 61 starts to move up and down with the L-shaped platform 54. And the right-side wheel rod 39 connected to the right upper pulley 59 also starts to make a fan-shaped trajectory displacement, driving the angle rod 40 fixed on the right-side wheel rod 39 to make a small-displacement swing. Then the angle rod 40 drives the middle rod 41 and the lower pulley 85 rotatably connected to the middle rod 41 to move up and down in the right-side wall groove. As the angle rod 40 swings, the L-shaped platform 54 makes a vertical displacement in the horizontal plane of the platform chute 42 opened. The above-mentioned L-shaped moving frame 43 makes a rectangular route displacement in the vertical plane. And the second motor 44 above the right upper part of the L-shaped moving frame 43 starts to be energized. The input gear 70 at the output end drives the grinding wheel 45 to rotate through meshing transmission with the external tooth sliding ring 71 to grind the rear shell of the mobile phone.

[0041] When the grinding wheel 45 becomes blunt during the gradual grinding process, the third motor 13 fixed on the fixed platform 14 is energized and starts to rotate counterclockwise. The output end outputs the bevel gear 15 to start rotating, driving the input bevel gear 16 to rotate through the meshing of the teeth with the input bevel gear 16. Then, the secondary rotating shaft 47 fixed to the input bevel gear 16 starts to rotate counterclockwise. The large pulley 21 fixed on the secondary rotating shaft 47 rotates counterclockwise. The large pulley 21 drives the belt 30 to rotate counterclockwise. Then, the irregular pulley 57 at the other end of the belt 30 starts to rotate counterclockwise. The irregular pulley 57 drives the main platform 55 to rotate clockwise through the meshing with the irregular teeth at the end of the platform rotating shaft 36. The return spring 56 fixed on the main platform 55 starts to stretch.

[0042] During the clockwise rotation of the L-shaped moving frame 43, it contacts the L-shaped rotating rod 74. Then, the L-shaped rotating rod 74 rotates counterclockwise until the L-shaped moving frame 43 is completely inside the C-shaped cavity 75. The third motor 13 starts to rotate clockwise. Then, the secondary rotating shaft 47 starts to rotate clockwise. The connected belt 30 drives the irregular pulley 57 at the other end to also start rotating clockwise. Since the irregular pulley 57 does not have meshing transmission with the irregular teeth of the platform rotating shaft 36 in the clockwise direction, the return spring 56 starts to act counterclockwise on the main platform 55 under the action of the rebound force. However, since the L-shaped moving frame 43 passes through the L-shaped rotating rod 74 and is in the C-shaped cavity 75, when the L-shaped moving frame 43 rotates counterclockwise, it forces the L-shaped rotating rod 74 to rotate clockwise. Since the lower end of the L-shaped rotating rod 74 presses on the magnetic rod 81 and gets stuck, the rebound of the return spring 56 stops, and the positioning process ends. At this time, the first motor 33 is energized to make the L-shaped moving frame 43 in the descending stage of the rectangular movement route. Then, the L-shaped moving frame 43 presses on the lower end of the C-shaped cavity 75 to pull the clamping block 53 downward and compress the clamping spring 52.

[0043] When the grinding wheel 45 presses on the rod sleeve 25, the first motor 33 is powered off. Then, the output grinding shaft 73 compresses the receiving spring 72 to make the input gear 70 and the outer tooth sliding ring 71 fully contact and mesh. Since the rod sleeve 25 is pressed, the hook claw 24 moves clockwise towards the center. Then, the included angle of the hook claw 24 clamps the grinding wheel 45. At this time, the second motor 44 starts to rotate, and the output grinding shaft 73 starts to rotate clockwise. Since the grinding wheel 45 is stuck, the protruding round rod 82 compresses the contact ball 83 along the replacement chute 60 to separate the output grinding shaft 73 from the grinding wheel 45, and the second motor 44 stops. After the first motor 33 is energized to make the L-shaped moving frame 43 in the ascending stage of the rectangular route, the first motor 33 is powered off. Since the secondary rotating shaft 47 rotates, the array rod 23 fixed on the secondary rotating shaft 47 drives the outer tooth transmission ring 17 fixed on the array rod 23 to start rotating. Then, the transmission gear 18 meshing with the outer tooth transmission ring 17 through the over teeth rotates, driving the intermediate turntable 62 to rotate. Then, the output shaft 63 located on the intermediate turntable 62 starts to rotate, and the C-shaped rotating block 22 also starts to rotate.

[0044] When the output shaft 63 rotates to the middle of a pair of protruding columns 26, the elastic pulley 64 at the lower end of the output shaft 63 begins to squeeze the protruding columns 26. At this time, the notch of the C-shaped rotating block 22 will contact the protruding edge of the replacement platform 48. Under the combined action of the two, the replacement platform 48 is forced to rotate a certain angle, and then the output bevel gear 15 stops. After the first motor 33 is energized and the L-shaped moving frame 43 moves downward along a rectangular path and presses into the new replacement chute 60 opening, the L-shaped moving frame 43 is de-energized. The second motor 44 is energized and rotates counterclockwise, then the output grinding shaft 73 rotates counterclockwise to squeeze and contact the ball 83. After reaching the bottom end of the replacement chute 60, the second motor 44 is de-energized. The first motor 33 is energized to make the L-shaped moving frame 43 in the rectangular rising stage and then de-energized. At this time, the electromagnet 79 starts to be energized to compress the spring 80 and pull the magnetic rod 81 to the left. Then, under the pressure of the L-shaped moving frame 43, the L-shaped rotating rod 74 rotates to the horizontal position through the arc-shaped groove. The L-shaped moving frame 43 returns to its original position with the main platform 55 under the action of the return spring 56. The electromagnet 79 is de-energized and the magnetic force rod 81 extends to the right, forcing the L-shaped rotating rod 74 to return to its original position counterclockwise, and the replacement process ends.

[0045] The above are only the embodiments of the present invention, and do not limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A mold opening system for a mobile phone back cover, comprising a housing (10), characterized in that, The housing (10) is provided with a feed inlet (50). An inner cavity (46) is provided inside the housing (10). A fixed platform (14) is provided on the left side wall of the inner cavity (46). A third motor (13) is fixedly provided on the fixed platform (14). An output bevel gear (15) is provided at the output end of the third motor (13). A thick rod column (51) is provided on the upper surface of the inner cavity (46). A transport slide rail (11) is provided on the lower surface of the inner cavity (46). A protruding platform (12) is provided on the rear side wall of the inner cavity (46). A platform rotating shaft (36) is rotatably provided in the through hole of the protruding platform (12). An irregular pulley (57) is rotatably provided at the lower end of the platform rotating shaft (36). A main platform (55) is fixedly provided at the upper end of the platform rotating shaft (36). A return spring (56) is provided outside the main platform (55). The end of the return spring (56) is fixed on the housing (10). A fixed thick rod (34) is provided on the main platform (55). A first motor (33) is fixedly provided at the upper right of the main platform (55). A long rotating shaft (37) is provided at the output end of the first motor (33). The long rotating shaft (37) rotates through the through hole on the fixed thick rod (34). Two large rotating wheels (35) are fixedly provided on the long rotating shaft (37). A feed inlet (50) is provided on the lower surface of the inner cavity (46). Two fixed blocks (49) are provided on the lower surface of the inner cavity (46). A polishing device is provided inside the inner cavity (46). The polishing device is used to polish the burrs and excess materials on the molded mobile phone back cover; during the polishing process of the polishing device, the grinding wheel adopts a rectangular movement path, polishes the mobile phone back shell with the long side, and completes a cycle for polishing one mobile phone back shell, and precisely polishes the mobile phone back shell; The polishing device includes a platform chute (42) provided on the main platform (55). An L-shaped platform (54) is slidably provided in the platform chute (42). A vertical chute (67) is provided on the L-shaped platform (54). A horizontal slide (65) is slidably provided in the vertical chute (67). A horizontal chute (68) is provided on the horizontal slide (65). A slider (76) is slidably provided in the horizontal chute (68). A connecting rod (66) is hinged on the slider (76). A swing rod (32) is hinged on the connecting rod (66). The end of the swing rod (32) is hinged with a square block (31) through a rod. The square block (31) is fixed on the main platform (55). An upper pulley (59) is rotatably provided at the end of the connecting rod (66). Sector-shaped chutes (58) are provided on the large rotating wheels (35); The upper pulley (59) and the sector chute (58) are both in sliding transmission. Two fixed columns (61) are fixedly arranged on the horizontal slide table (65). An L-shaped moving frame (43) is arranged on the fixed column (61). A cavity (84) is arranged inside the right side of the L-shaped moving frame (43). A second motor (44) is fixedly arranged above the right side of the L-shaped moving frame (43). The output end of the second motor (44) extends into the cavity (84). An input gear (70) is arranged at the output end of the second motor (44). An output grinding shaft (73) is slidably arranged inside the cavity (84). An external gear sliding ring (71) is fixedly arranged at the upper end of the output grinding shaft (73). The external gear sliding ring (71) is meshed with the input gear (70) through teeth. A receiving spring (72) is fixedly arranged on the output grinding shaft (73). The upper end of the receiving spring (72) is fixedly arranged on the L-shaped moving frame (43). A protruding round rod (82) is fixedly arranged at the lower end of the output grinding shaft (73). A grinding wheel (45) is slidably arranged on the protruding round rod (82). A replacement chute (60) is arranged on the grinding wheel (45). The protruding round rod (82) slides inside the replacement chute (60). Contact balls (83) are arranged on the side wall of the replacement chute (60). The protruding round rod (82) abuts against the contact balls (83). A lower pulley (85) is slidably arranged inside the groove on the right side wall of the L-shaped platform (54). An intermediate rod (41) is rotatably arranged on the lower pulley (85). An angle rod (40) is fixedly arranged on the intermediate rod (41). A right-side wheel rod (39) is fixedly arranged on the angle rod (40). A fixed thin rod (38) is arranged on the main platform (55). The right-side wheel rod (39) rotates inside the through hole on the fixed thin rod (38). The right end of the right-side wheel rod (39) is rotatably connected to the right end of the upper pulley (59). A replacement device is arranged on the left side of the inner cavity (46). The replacement device is used for the function of replacing the grinding wheel worn due to grinding. The replacement device includes a secondary rotating shaft (47) rotatably arranged on a fixed block (49) on the left side. A C-shaped rotating block (22) is fixedly arranged at the lower end of the secondary rotating shaft (47). An input turntable (19) is fixedly arranged on the secondary rotating shaft (47). A transmission rotating shaft (20) is rotatably arranged at the end of the input turntable (19). A transmission gear (18) is fixedly arranged at the upper end of the transmission rotating shaft (20). An intermediate turntable (62) is fixedly arranged at the lower end of the transmission rotating shaft (20). An output shaft (63) is fixedly arranged at the end of the intermediate turntable (62). An elastic pulley (64) is rotatably arranged at the lower end of the output shaft (63). Array rods (23) are fixedly arranged in an annular array on the secondary rotating shaft (47). An external gear transmission ring (17) is fixedly arranged at the lower end of the array rod (23). The transmission gear (18) is meshed with the external gear transmission ring (17) through teeth. A large pulley (21) is fixedly arranged on the secondary rotating shaft (47). A belt (30) is arranged on the large pulley (21).

2. The mobile phone back cover mold opening system according to claim 1, characterized in that: The other end of the belt (30) is connected to the irregular pulley (57). An input bevel gear (16) is fixedly provided at the upper end of the secondary rotating shaft (47). The input bevel gear (16) meshes with the output bevel gear (15). An input rotating shaft (29) is rotatably provided on the right fixed block (49). A replacement platform (48) is fixedly provided on the input rotating shaft (29). Protruding columns (26) are fixedly provided in an annular array on the replacement platform (48). Array holes (28) are provided in an annular array on the replacement platform (48). Hook claws (24) are hinged to the side grooves in the array holes (28) through rods. Rod sleeves (25) are slidably provided at the ends of the hook claws (24). A stopping device is provided on the upper side of the inner cavity (46). The stopping device is used to fix the bracket to prevent rebound and ensure accurate replacement positioning.

3. The mobile phone back shell mold opening system according to claim 2, wherein: The stopping device includes a groove provided in the thick rod column (51). A block (53) is slidably provided in the groove. A positioning spring (52) is provided on the block (53). A C-shaped cavity (75) is provided on the block (53). A fixed pin (78) is fixedly provided on the inner wall of the C-shaped cavity (75). An L-shaped rotating rod (74) is hinged to the fixed pin (78). A spring (80) is fixedly provided in the block (53). An electromagnetic block (79) is fixedly provided at the left end of the spring (80). A magnetic force rod (81) is slidably provided on the spring (80). The electromagnetic block (79) and the magnetic force rod (81) are connected by a small spring.

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