Automatic polishing equipment for polishing polaroid of display screen

Abstract

The invention relates to the field of polaroid grinding equipment, in particular to display screen polaroid automatic grinding equipment which comprises a rotary table arranged between a grinding machine tool and a conveying belt, a suction cup picking mechanism is arranged at the top of the rotary table and comprises a triangular sleeve, and a short pipe, a hinge and a cantilever are slidably connected in the sleeve in a matched and sleeved mode. The two ends of the hinge are hinged to the short pipe and the cantilever respectively. According to the automatic grinding equipment for grinding the polaroid of the display screen, the structure and the function of a Z-axis support part which is conventionally and vertically arranged and an X axis are fused through the suction cup picking mechanism, so that a suction cup assembly can easily feed the polaroid into a grinding machine tool with the space height limited, and the height of the suction cup assembly can be greatly lowered; the requirement for taking polaroids with different height differences between the grinding machine tool and the conveying belt is met, the large height difference between the grinding machine tool and the conveying belt is allowed, and the suction cup pickup mechanism has the advantages of being compact in structure, small in occupied space and low in movement interference.

Description

Technical Field

[0001] The invention relates to the field of polarizer polishing equipment, in particular to automatic polishing equipment for display screen polarizer polishing. Background Art

[0002] The display polarizer production line uses a suction cup to transfer the polarizer between the grinding equipment and the conveyor belt. When the suction cup absorbs, transfers and releases the polarizer, it needs to complete at least two basic actions: lifting (Z-axis) and translation (X-axis). Each action is completed by a telescopic bracket and a cylinder. The structure is often L-shaped. Such a structure is simple and reliable. However, the vertical part at the end of the bracket that controls the lifting of the suction cup and the polarizer is often not designed too high due to the limited operating space height of the grinding equipment, resulting in a very short vertical stroke of the suction cup, which greatly reduces the compatibility with the height difference between the grinding equipment assembly table and the conveyor belt. When the height difference between the grinding equipment assembly table and the conveyor belt is large, whether using a manipulator with higher degrees of freedom or raising the conveyor belt, the equipment cost of the production line will be significantly increased. Therefore, in order to optimize the above problems, an automatic grinding device for display polarizer grinding is proposed that integrates the Z-axis function of the suction cup bracket into the X-axis. Summary of the invention

[0003] In view of the problem that the suction cup picking device of the polarizer polishing equipment in the above or prior art has poor compatibility with the drop height of the conveyor belt, the present invention is proposed.

[0004] Therefore, the object of the present invention is to provide an automatic polishing device for polishing a display screen polarizer.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic polishing device for polishing a display screen polarizer, comprising a turntable arranged between a polishing machine and a conveyor belt, a suction cup pickup mechanism arranged on the top of the turntable, comprising a triangular sleeve, a matching sliding sleeve short tube, a hinge and a cantilever in the sleeve, the two ends of the hinge are respectively hinged to the short tube and the cantilever, one end of the cantilever away from the hinge is rotatably connected to a swing arm and a pulley, the swing arm is arranged vertically, and a suction cup assembly is arranged at the bottom of the swing arm, and the short tube, hinge and cantilever are respectively hinged to the cantilever and the hinge. A screw rod is inserted through the chain and the cantilever, and the screw rod is threadedly connected to the short tube. A bracket is fixedly connected between one end of the sleeve and the turntable, and one end of the screw rod is rotatably connected to the bracket; the hinge is provided with five joints, and when the short tube, hinge and cantilever end are sleeved inside the sleeve, the top of the short tube, hinge and cantilever are horizontally coplanar, and the hinge axis of the short tube, hinge and cantilever is set at the top, and the sum of the angles between adjacent joints, the angles between the short tube and its adjacent joints, and the angles between the cantilever and its adjacent joints is ninety degrees.

[0006] As a preferred solution of the automatic polishing equipment for display polarizer of the present invention, the tube walls on both sides of the cantilever away from the hinge end are cut and bent to be vertically arranged, and a short shaft is vertically fixed and inserted between the two parallel tube walls, and the short shaft is rotatably inserted into the pulley and the top of the swing arm.

[0007] As a preferred solution of the automatic polishing equipment for display screen polarizer polishing of the present invention, a short pin is inserted between the pulley and the swing arm, and the pulley is located on one side of the swing arm and has a slot, the slot is matched with the end clearance of the short pin, and the short pin is fixedly inserted with the swing arm.

[0008] As a preferred solution of the automatic polishing equipment for polishing the polarizer of the display screen of the present invention, a torsion spring is arranged between the side of the pulley away from the swing arm and the inner wall of the cantilever, a pull wire is wrapped around the pulley, and the pull wire extends from the bottom of the pulley, and one end of the pull wire passes through the cantilever, through the hinge to the short tube, the end of the pull wire is hung with the short tube, and the torsion spring pre-tightens the pulley and the pull wire.

[0009] As a preferred solution of the automatic polishing equipment for display polarizer of the present invention, wherein: from the cantilever to the short tube direction, the angles between the cantilever and the joints, between the joints, and between the joints and the short tube are five degrees, ten degrees, fifteen degrees, twenty degrees, twenty degrees and twenty degrees respectively, and the total is ninety degrees.

[0010] As a preferred solution of the automatic polishing equipment for display screen polarizer polishing of the present invention, the sum of the angle opening widths of the short tube, the joint and the cantilever at the wire passing position is equal to one quarter of the circumference of the pulley wire groove.

[0011] As a preferred solution of the automatic polishing equipment for polishing the display polarizer of the present invention, the pull wire is located at the bottom of the screw rod, and the joint is located at the matching opening where the pull wire and the screw rod pass through.

[0012] As a preferred solution of the automatic polishing equipment for display screen polarizer polishing of the present invention, wherein: a ball nut is fixedly connected inside the short tube, and the screw rod is threadedly connected to the ball nut, the bracket is fixedly connected to a motor, and the output shaft of the motor is coaxially connected to the screw rod.

[0013] As a preferred solution of the automatic polishing equipment for polishing the display polarizer of the present invention, the length of the screw rod is shorter than the sleeve, and the total length of the short tube, hinge and cantilever is greater than the sleeve.

[0014] As a preferred solution of the automatic polishing equipment for display screen polarizer polishing of the present invention, the suction cup assembly includes an "X"-shaped suction cup frame, and a suction cup is installed at the bottom of the suction cup frame.

[0015] The beneficial effects of the automatic polishing equipment for polishing polarizers for display screens of the present invention are as follows: the automatic polishing equipment for polishing polarizers for display screens, the suction cup picking mechanism thereof eliminates the vertically arranged Z-axis bracket of the traditional robotic arm by integrating the structure and function of the conventional vertically arranged Z-axis bracket part with the X-axis, so that the suction cup assembly can easily deliver the polarizer into the interior of a polishing machine tool with limited space height, and can also significantly lower the height of the suction cup assembly to meet the polarizer material picking requirements of different height differences between the polishing machine tool and the conveyor belt, especially allowing a larger height difference between the polishing machine tool and the conveyor belt. The suction cup picking mechanism has the significant advantages of compact structure, small space occupation, and low motion interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 Schematic diagram of the structural layout of the automatic polishing equipment for display screen polarizers.

[0018] Figure 2 Schematic diagram of the picking mechanism structure of the automatic polishing equipment for display polarizer polishing.

[0019] Figure 3 for Figure 2 Structural cross-section view.

[0020] Figure 4 for Figure 3 Further dissection diagram of .

[0021] Figure 5 for Figure 4 A magnified view of the structure at center.

[0022] Figure 6 for Figure 4 A magnified view of the structure at point B.

[0023] Figure 7 for Figure 3 Schematic diagram of the structure after the inner sleeve is extended.

[0024] Figure 8 for Figure 7 Exploded view of the assembly structure at C in the middle.

[0025] In the figure: 100, grinding machine; 101, turntable; 102, conveyor belt; 200, suction cup picking mechanism; 201, sleeve; 202, short tube; 203, hinge; 204, cantilever; 205, swing arm; 206, pulley; 207, suction cup assembly; 208, screw rod; 209, bracket; 210, short shaft; 211, short pin; 212, torsion spring; 213, pull wire; 214, ball nut; 215, motor; 203a, joint; 205a, slot. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] Example, see Figures 1 to 8 This embodiment provides an automatic polishing device for polishing polarizers of display screens. By integrating the Z-axis lifting function with the X-axis, the suction cup picking mechanism 200 can pick up the polarizer on the high-drop conveyor belt 102 and deliver it into the low-space operating space of the polishing device, such as Figure 1 As shown, it includes a turntable 101 disposed between a grinding machine 100 and a conveyor belt 102, and a suction cup picking mechanism 200 is disposed on the top of the turntable 101. Figure 3 and 6 As shown, the suction cup picking mechanism 200 includes a triangular sleeve 201, and a short tube 202, a hinge 203 and a cantilever 204 are matched and slidably sleeved in the sleeve 201. The two ends of the hinge 203 are hinged to the short tube 202 and the cantilever 204 respectively. One end of the cantilever 204 away from the hinge 203 is rotatably connected with a swing arm 205 and a pulley 206. The swing arm 205 is vertically arranged, and a suction cup assembly 207 is arranged at the bottom end of the swing arm 205. The suction cup assembly 207 includes an "X"-shaped suction cup frame, and a suction cup is installed at the bottom of the suction cup frame. A screw rod 208 is inserted through the short tube 202, the hinge 203 and the cantilever 204, and the screw rod 208 is threadedly connected to the short tube 202. A bracket 209 is fixedly connected between one end of the sleeve 201 and the turntable 101, and one end of the screw rod 208 is rotatably connected to the bracket 209; as shown in FIG. Figure 5 As shown, the hinge 203 is provided with five joints 203a, and when the short tube 202, the hinge 203 and the cantilever 204 are sleeved inside the sleeve 201, the tops of the short tube 202, the hinge 203 and the cantilever 204 are horizontally coplanar, and the hinge axes of the short tube 202, the hinge 203 and the cantilever 204 are arranged at the top, and the angles between adjacent joints 203a, the angles between the short tube 202 and its adjacent joints 203a, and the angles between the cantilever 204 and its adjacent joints 203a, sum to ninety degrees.

[0028] Specifically, Figure 6As shown, the tube walls on both sides of the cantilever 204 away from the hinge 203 are cut and bent to be vertically arranged, and a short shaft 210 is vertically fixed and inserted between the two parallel tube walls. The short shaft 210 is rotatably inserted into the pulley 206 and the top of the swing arm 205. A short pin 211 is inserted between the pulley 206 and the swing arm 205, and the pulley 206 is located on one side of the swing arm 205 and has a slot 205a. The slot 205a is matched with the end clearance of the short pin 211. The short pin 211 is fixedly inserted with the swing arm 205. A torsion spring 212 is arranged between the side of the pulley 206 away from the swing arm 205 and the inner wall of the cantilever 204. The pulley 206 is wound with a pull wire 213, and the pull wire 213 extends from the bottom of the pulley 206. Figure 4 As shown, one end of the pull wire 213 passes through the cantilever 204 , passes through the hinge 203 and reaches the short tube 202 , the end of the pull wire 213 is hung on the short tube 202 , and the torsion spring 212 preloads the pulley 206 and the pull wire 213 .

[0029] like Figure 5 As shown, the pull wire 213 is located at the bottom of the screw rod 208, and the joint 203a is located at the matching opening where the pull wire 213 and the screw rod 208 pass through, a ball nut 214 is fixedly connected in the short tube 202, and the screw rod 208 is threadedly connected to the ball nut 214, and the bracket 209 is fixedly connected to the motor 215, and the output shaft of the motor 215 is coaxially connected to the screw rod 208; Figure 4 As shown, the length of the screw rod 208 is shorter than the sleeve 201 , and the total length of the short tube 202 , the hinge 203 and the cantilever 204 is greater than the sleeve 201 .

[0030] The present invention provides an automatic polishing device for polishing polarizers for display screens, wherein a suction cup picking mechanism 200 for transferring polarizers between a polishing machine 100 and a conveyor belt 102 is mainly provided. The suction cup picking mechanism 200 of the present invention is different from the existing suction cup picking device in that the suction cup picking mechanism 200 of the present invention integrates the conventional vertically arranged Z-axis bracket 209 with the X-axis in terms of structure and function. Figure 3 When the hinge 203 slides in the sleeve 201 as a whole, the entire suction cup picking mechanism 200 drives the suction cup assembly 207 to move horizontally. At this time, the suction cup picking mechanism 200 is only used as an X-axis robot arm. Figure 7When a part or all of the hinge 203 extends out of the sleeve 201, the gravity of the cantilever 204 and the pull wire 213 close the angles of the adjacent joints 203a, thereby causing the end of the cantilever 204 to move in the vertical direction, which is equivalent to the function of the Z axis. Therefore, when the hinge 203 is partially or completely retracted in the sleeve 201, the suction cup pickup mechanism 200 of the present invention does not have the Z axis bracket 209 vertically arranged in the traditional robot arm, and the suction cup assembly 207 of the present invention can easily deliver the polarizer into the space with high altitude. The suction cup assembly 207 is limited to the inside of the grinding machine 100, and when the suction cup assembly 207 moves to the conveyor belt 102 area, the suction cup assembly 207 can be greatly lowered in height to meet the polarizer material picking needs of different height differences between the grinding machine 100 and the conveyor belt 102, especially allowing a larger height difference between the grinding machine 100 and the conveyor belt 102. In addition, thanks to the structural and functional integration of the Z-axis and the X-axis, the suction cup picking mechanism 200 has significant advantages such as compact structure, small space occupation, and low motion interference.

[0031] To achieve the above functions, the present invention also involves the following technical details:

[0032] First, regarding the calibration of the horizontal posture of the suction cup assembly 207 (or the calibration of the vertical posture of the swing arm 205), first refer to Figure 3 , perform a posture calibration on the suction cup picking mechanism 200, that is, when the hinge 203 is in the sleeve 201 as a whole, such as Figure 6 As shown, the torsion spring 212 applies a preload force to the pulley 206 to rotate and tighten the pull wire 213, as shown in FIG. Figure 4 and Figure 5 As shown, the other end of the pull wire 213 passes through the hinge 203 and is hung inside the short tube 202 to Figure 4 Taking the perspective as an example, assuming that the swing arm 205 is to swing to the left, the structural force transmission path is sequentially transmitted from the swing arm 205, the short pin 211, the pulley 206 to the torsion spring 212. Since the torsion spring 212 is pre-stressed, the pre-tightening force of the torsion spring 212 prevents the swing arm 205 from swinging to the left. If the swing arm 205 is to swing to the right, it will drive the pulley 206 to further tighten the tension wire 213. At this time, the tension wire 213 is already tightened, so the swing arm 205 cannot swing to the right. At this time, the posture of the swing arm 205 can be calibrated as a vertical state;

[0033] Secondly, as to how to keep the suction cup assembly 207 in a horizontal posture during the lifting process, from the cantilever 204 to the short tube 202, the angles between the cantilever 204 and the joints 203a, between the joints 203a, and between the joints 203a and the short tube 202 are 5 degrees, 10 degrees, 15 degrees, 20 degrees, 20 degrees and 20 degrees respectively, and the total is 90 degrees. The total width of the opening of the angles between the short tube 202, the joints 203a and the cantilever 204 at the position where the pull wire 213 passes through is equal to one-fourth of the circumference of the wire groove of the pulley 206. That is, when the hinge 203 is fully extended out of the sleeve 201, the cantilever 204 can be deflected downward by 90 degrees from the horizontal, and the suction cup assembly 207 reaches the maximum descending depth. Then, the joints 20 When the angle between the joints 203a and the short tube 202, and the angle between the joints 203a and the cantilever 204 are completely closed, the pull wire 213 is released from the original tensioned state by a length equivalent to the sum of the widths of the angles of the short tube 202, the joints 203a and the cantilever 204 at the position where the pull wire 213 passes through, and the released part of the pull wire 213 is completely wound up by the pulley 206 driven by the torsion spring 212. Since the length of the released pull wire 213 is one-fourth of the circumference of the wire groove of the pulley 206, the pulley 206 can be rotated ninety degrees. Since the swing arm 205 is synchronized with the pulley 206 through the short pin 211, the swing arm 205 is also deflected ninety degrees, and the deflection direction is opposite to that of the cantilever 204, so the suction cup still maintains a horizontal posture;

[0034] The principle of maintaining the horizontal posture of the suction cup assembly 207 at different bending angles of the hinge 203 is the same as the above principle;

[0035] Third, regarding the passive compensation of the horizontal posture of the suction cup assembly 207, refer to Figure 6 A clearance fit is used between the end of the short pin 211 and the slot 205a on the pulley 206, that is, the swing arm 205 is allowed to freely swing in a small range relative to the pulley 206. This is to compensate for the transmission ratio error caused by machining assembly and wear. For example, after long-term use, the pull wire 213 is stretched, resulting in the angle of the pulley 206 being misaligned. The gap between the short pin 211 and the slot 205a can be used to allow the swing arm 205 to freely swing down to a vertical angle under the action of gravity. Since the gap is small, there is no need to consider whether the gap will cause repeated swinging and oscillation of the swing arm 205 and the suction cup.

[0036] In summary, the automatic polishing equipment for polishing polarizers for display screens, its suction cup picking mechanism 200 integrates the structure and function of the conventional vertically arranged Z-axis bracket 209 part with the X-axis, thereby eliminating the vertically arranged Z-axis bracket 209 of the traditional robotic arm, so that the suction cup assembly 207 can easily deliver the polarizer into the interior of the polishing machine 100 with limited space height, and can also significantly lower the height of the suction cup assembly 207 to meet the polarizer material picking requirements of different height differences between the polishing machine 100 and the conveyor belt 102, especially allowing a larger height difference between the polishing machine 100 and the conveyor belt 102. The suction cup picking mechanism 200 has significant advantages such as compact structure, small space occupation, and low motion interference.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An automatic polishing device for polishing polarizers of display screens, characterized in that: The invention comprises a turntable (101) arranged between a grinding machine (100) and a conveyor belt (102), wherein a suction cup picking mechanism (200) is arranged on the top of the turntable (101), and comprises a triangular sleeve (201), wherein a short tube (202), a hinge (203) and a cantilever (204) are matched and slidably sleeved in the sleeve (201), and wherein two ends of the hinge (203) are respectively hinged to the short tube (202) and the cantilever (204), and an end of the cantilever (204) away from the hinge (203) is rotatably connected to a swing arm (205) and a pulley (206), the swing arm (205) is vertically arranged, and a suction cup assembly (207) is arranged at the bottom end of the swing arm (205), and a screw rod (208) is inserted and inserted between the short tube (202), the hinge (203) and the cantilever (204), and the screw rod (208) is threadedly connected to the short tube (202), and a bracket (209) is fixedly connected between one end of the sleeve (201) and the turntable (101), and one end of the screw rod (208) is rotatably connected to the bracket (209); The hinge (203) is provided with five joints (203a), and when the ends of the short tube (202), the hinge (203) and the cantilever (204) are sleeved inside the sleeve (201), the tops of the short tube (202), the hinge (203) and the cantilever (204) are horizontally coplanar, and the hinge axes of the short tube (202), the hinge (203) and the cantilever (204) are arranged at the tops, and the sum of the angles between adjacent joints (203a), the angles between the short tube (202) and its adjacent joints (203a), and the angles between the cantilever (204) and its adjacent joints (203a) is ninety degrees.

2. The automatic polishing device for polishing the display polarizer according to claim 1, characterized in that: The tube walls on both sides of the cantilever (204) away from one end of the hinge (203) are cut and bent to be vertically arranged, and a short shaft (210) is vertically fixed and inserted between the two parallel tube walls, and the short shaft (210) is rotatably inserted into the pulley (206) and the top of the swing arm (205).

3. The automatic polishing device for polishing the display polarizer according to claim 2, characterized in that: A short pin (211) is inserted between the pulley (206) and the swing arm (205), and a slot (205a) is provided on one side of the pulley (206) located on the swing arm (205), the slot (205a) is clearance-matched with the end of the short pin (211), and the short pin (211) is fixedly inserted with the swing arm (205).

4. The automatic polishing device for polishing the display polarizer according to claim 3, characterized in that: A torsion spring (212) is arranged between the side of the pulley (206) away from the swing arm (205) and the inner wall of the cantilever (204); a pull wire (213) is wound around the pulley (206), and the pull wire (213) extends from the bottom of the pulley (206), and one end of the pull wire (213) passes through the cantilever (204), passes through the hinge (203) to the short tube (202), and the end of the pull wire (213) is hung on the short tube (202), and the torsion spring (212) pre-tightens the pulley (206) and the pull wire (213).

5. The automatic polishing device for polishing the display polarizer according to claim 4, characterized in that: From the cantilever (204) toward the short tube (202), the angles between the cantilever (204) and the joints (203a), between the joints (203a), and between the joints (203a) and the short tube (202) are five degrees, ten degrees, fifteen degrees, twenty degrees, twenty degrees, and twenty degrees, respectively, with a total of ninety degrees.

6. The automatic polishing device for polishing the display polarizer according to claim 5, characterized in that: The sum of the widths of the angled openings of the short tube (202), the joint (203a) and the cantilever (204) at the position where the pull wire (213) passes through is equal to one quarter of the circumference of the wire groove of the pulley (206).

7. The automatic polishing device for polishing the display polarizer according to claim 6, characterized in that: The pull wire (213) is located at the bottom of the screw rod (208), and the joint (203a) is located at a matching opening where the pull wire (213) and the screw rod (208) pass through.

8. The automatic polishing device for polishing the display polarizer according to claim 1, characterized in that: A ball nut (214) is fixedly connected inside the short tube (202), and the screw rod (208) is threadedly connected to the ball nut (214); the bracket (209) is fixedly connected to a motor (215), and the output shaft of the motor (215) is coaxially connected to the screw rod (208).

9. The automatic polishing device for polishing the display polarizer according to claim 8, characterized in that: The length of the screw rod (208) is shorter than that of the sleeve (201), and the total length of the short tube (202), the hinge (203) and the cantilever (204) is greater than that of the sleeve (201).

10. The automatic polishing device for polishing the display polarizer according to claim 9, characterized in that: The suction cup assembly (207) comprises an "X"-shaped suction cup frame, and a suction cup is installed at the bottom of the suction cup frame.

Images