Semi-automatic high-precision cap screwing machine based on ultrasonic friction reducing effect

[0036] Specific implementation mode 1: Combination Figure 1~Figure 11 To explain this embodiment, this embodiment provides a specific implementation of a semi-automatic high-precision capping machine based on the ultrasonic anti-friction effect, and the specific implementation of the semi-automatic high-precision capping machine based on the ultrasonic anti-friction effect The way is expressed as follows:

[0037] Such as figure 1 As shown, the semi-automatic high-precision capping machine based on the ultrasonic anti-friction effect includes a device housing 1, a lifting positioning system 2 and a capping device 3; wherein, the lifting positioning system 2 constitutes the main body support of the capping machine The device housing 1 is installed on the peripheral frame of the lifting positioning system 2 and is used for semi-closed packaging of the lifting positioning system 2. The capping device 3 is fixed on the lifting positioning system 2.

[0038] Such as Figure 2~3 As shown, the device housing 1 includes a housing cover A1-1, a housing cover B1-2, a housing cover C1-3, a housing cover D1-4 and a fixing bolt 1-5; the fixing bolt 1-5 connects the housing cover A1 -1 and the housing cover C1-3 are fixedly installed at the front and rear ends of the support plate 2-3; the housing cover B1-2 and the housing cover D1-4 are installed and fixed on the housing cover A1-1 and the housing cover by fixing bolts 1-5 On C1-3; the four shell covers can all be made of aluminum alloy.

[0039] Such as Figure 4~5 As shown, the lifting positioning system 2 includes a coarse displacement adjuster 2-1, an upper bearing 2-2, a support plate 2-3, a support shaft 2-4, a rectangular threaded shaft 2-5, a lower bearing 2-6, and a base Seat 2-7, fine displacement regulator 2-8, drive disc 2-9, driven rod 2-10, connecting bolt 2-11, capping machine mounting plate 2-12, pin 2-13, fixed plate I2 -14. Fixed plate II 2-15, fixed plate III 2-16, connecting rod 2-17, precision spring 2-18 and fixing screw 2-19; ​​the coarse displacement adjuster 2-1 and the upper end of the rectangular threaded shaft 2-5 Threaded connection; the upper end of the rectangular threaded shaft 2-5 and the support plate 2-3 are connected through the upper bearing 2-2, and the lower end of the rectangular threaded shaft 2-5 is connected with the base 2-7 through the lower bearing 2-6, wherein the coarse displacement adjuster 2 is rotated -1 Make the fixed plate Ⅱ 2-15 and the fixed plate Ⅲ 2-16 move up and down on the rectangular threaded shaft 2-5; the two support shafts 2-4 are symmetrically distributed on both sides of the rectangular threaded shaft 2-5. The upper end of the support shaft 2-4 is threadedly connected with the support plate 2-3, and its lower end is threadedly connected with the base 2-7 to form the main support frame of the lifting positioning system; the fine displacement adjuster 2-8 and the drive disc 2 -9 threaded connection at the end; the driven rod 2-10 is installed on the drive disc 2-9 through the connecting bolt 2-11, where the installation position of the connecting bolt 2-11 is the distance from the center of the drive disc 2-9 M, the value of m ranges from 5 to 10 cm, and the distance m in this specific embodiment is 8 cm; the driven rod 2-10 and the capping machine mounting plate 2-12 are connected by pins 2-13 to form a rotating pair The upper end of the fixing plate Ⅰ 2-14 and the fixing plate Ⅱ 2-15 are connected by corresponding screws, and the lower end and the fixing plate Ⅲ 2-16 are connected by corresponding screws; the connecting rod 2-17 uses the fixing screws 2-19 to connect with the fixing plate respectively Ⅱ 2-15 is connected to the fixed plate Ⅲ 2-16; the precision spring 2-18 is sleeved on the connecting rod 2-17, and its upper end is in contact with the capping machine mounting plate 2-12, and is accompanied by the capping machine mounting plate 2-12 The distance from the fixed plate Ⅲ 2-16 changes and stretches and deforms.

[0040] Such as Figure 6~11 As shown, the capping device 3 includes a piezoelectric element 3-1, a stator base 3-2, an air guide 3-3, a threaded drive shaft 3-4, a rubber sealing ring 3-5, a piston assembly 3-6, Cover 3-7, external link mechanism 3-8, locking screw 3-9 and capping head 3-10; the stator base 3-2 includes an internal threaded hole 3-2-1 at the upper end of the base and an internal threaded hole at the lower end of the base 3-2-2, the outer edge surface 3-2-3 and the mounting hole 3-2-4, the upper end of the air guide mechanism 3-3 is provided with an air guide mechanism external thread 3-3-1, the thread drive The shaft 3-4 includes a drive shaft internal threaded hole 3-4-1, a drive shaft external thread 3-4-2 and a sealing ring groove I3-4-3, and the outer end of the piston assembly 3-6 is provided with a sealing ring recess Slot II 3-6-1, the upper end of the cover 3-7 is provided with a cover external thread 3-7-1, the lower end of the external link mechanism 3-8 is provided with a connecting shaft 3-8-1, the The capping head 3-10 includes a round hole 3-10-1 at the upper end and a silicone bottle cap sleeve 3-10-2; wherein the piezoelectric element 3-1 can be a product of PI or NEC company, and the rubber sealing ring 3-5 can use O-shaped sealing ring; on the outer edge surface 3-2-3 of the stator base 3-2, 2n planes are arranged around the circumferential direction, and each plane is provided with a piece of piezoelectric element 3-1 , And each piezoelectric element 3-1 is glued to the center of the plane to make the stator base 3-2 generate axial vibration. In this embodiment, n is 6, and the number of piezoelectric elements a is 1. The internal threaded hole 3-2-2 at the lower end is threadedly connected with the external thread 3-4-2 of the drive shaft; the mounting hole 3-2-4 of the stator base 3-2 is used for the capping device 3 on the capping machine mounting plate 2 -12 installation and fixation; the air guide mechanism external thread 3-3-1 is threadedly connected with the internal thread hole 3-2-1 at the upper end of the base body, and the lower end of the air guide mechanism 3-3 is connected to the piston assembly 3-6 The upper end of the threaded connection; the sealing ring groove I3-4-3 in the upper end through hole of the threaded drive shaft 3-4 and the sealing ring groove II3-6-1 on the outer circumference of the piston assembly 3-6 are both It is used to place the rubber sealing ring 3-5 to ensure good air tightness of the inner cavity of the capping machine; the outer thread 3-7-1 of the cap is threadedly connected with the threaded hole 3-4-1 of the drive shaft; The upper end of the coupling mechanism 3-8 and the lower end of the cover 3-7 are connected by threads; the upper end circular hole 3-10-1 of the capping head 3-10 is connected to the external coupling mechanism 3 through the locking screw 3-9 -8 connecting shaft 3-8-1, the capping head 3-10 has a built-in replaceable silicone bottle cap cover 3-10-2, and the capping head 3-10 can also be replaced, according to different needs to install different models Screw cap head 3-10 or silicone bottle cap sleeve 3-10-2 can greatly reduce production costs.

[0041] Specific implementation manner two: combination Picture 8 , 9 , 12~14 illustrate this embodiment, this embodiment provides a method based on d 15 A specific embodiment of the capping device 3 of a semi-automatic high-precision capping machine with a mode ultrasonic antifriction effect. The difference between this embodiment and the first embodiment is that the capping device 3 includes a piezoelectric shear sheet 3-11 , Lower base 3-12, upper base 3-13, mounting screws 3-14, air guide 3-3, threaded drive shaft 3-4, rubber sealing ring 3-5, piston assembly 3-6, cover 3-7. External link mechanism 3-8, locking screw 3-9, and capping head 3-10; wherein, the piezoelectric shear sheet 3-11 can be a product of PI or NEC company, and the air guide mechanism The upper end of the 3-3 is provided with an air guide mechanism external thread 3-3-1, and the threaded drive shaft 3-4 includes a drive shaft internal threaded hole 3-4-1, a drive shaft external thread 3-4-2 and a sealing ring Groove I3-4-3, the lower base 3-12 includes an upper end internal threaded hole 3-12-1, a lower end internal threaded hole 3-12-2, a lower groove 3-12-3 of the piezoelectric sheet, and a fixing Hole 3-12-4 and fixing threaded hole 3-12-5, the upper base 3-13 includes a fixing through hole 3-13-1 and a groove 3-13-2 on the piezoelectric sheet; the mounting screw 3 -14 is fixedly connected to the fixing threaded hole 3-12-5 of the lower base 3-12 through the fixing through hole 3-13-1 of the upper base 3-13, and the lower base 3-12 is around the circumferential direction There are 2n piezoelectric lower grooves 3-12-3, and the upper base 3-13 is provided with 2n piezoelectric upper grooves 3-13-2 in the circumferential direction. In this embodiment, n is 6. The piezoelectric shear sheet 3-11 is glued and fixed between the lower groove 3-12-3 of the piezoelectric sheet and the upper groove 3-13-2 of the piezoelectric sheet, so that the lower base 3-12 produces a diameter To vibrate; the inner threaded hole 3-12-2 of the lower end of the lower base 3-12 is threadedly connected with the external thread 3-4-2 of the drive shaft; the fixing hole 3-12-4 of the lower base 3-12 Used to install and fix the capping device 3 on the capping machine mounting plate 2-12; the external thread 3-3-1 of the air guide mechanism and the internal threaded hole 3-12-1 thread of the upper end of the lower base 3-12 Connection; other components and other connection relations are the same as in the first embodiment.

[0042] Specific implementation mode three: combination Picture 8 , 9 , 15~17 illustrate this embodiment, this embodiment provides a method based on d 33 The specific embodiment of the capping device 3 of the semi-automatic high-precision capping machine with ultrasonic anti-friction effect. The difference between this embodiment and the first embodiment is that the capping device 3 includes ultrasonic anti-friction components 3-15, Upper cover 3-16, air guide 3-3, threaded drive shaft 3-4, rubber sealing ring 3-5, piston assembly 3-6, cover 3-7, external linkage 3-8, locking screw 3-9 and capping head 3-10; wherein the upper end of the air guide 3-3 is provided with an air guide external thread 3-3-1, and the threaded drive shaft 3-4 includes a drive shaft internal threaded hole 3 -4-1. Drive shaft external thread 3-4-2 and seal ring groove I3-4-3, the ultrasonic anti-friction component 3-15 includes cap threaded hole 3-15-1, base body threaded hole I3 -15-2, piezoelectric stack boss 3-15-3, piezoelectric stack 3-15-4, stop 3-15-5, countersunk through hole 3-15-6, ultrasonic anti-friction matrix 3 -15-7. Pre-tightening bolts 3-15-8 and threaded holes II 3-15-11 in the base. The piezoelectric stack 3-15-4 can be made by PI or NEC. The upper cover 3 -16 includes a cover through hole 3-16-1 and a cover fixing hole 3-16-2; the upper cover 3-16 passes through the cover fixing hole 3-16-2 and the ultrasonic anti-friction assembly 3 by screws -15 capping threaded hole 3-15-1; the threaded hole I3-15-2 in the base of the ultrasonic antifriction component 3-15 is threadedly connected with the external thread 3-3-1 of the air guide mechanism, and the pressure The two ends of the electric stack 3-15-4 are respectively connected with the piezoelectric stack boss 3-15-3 and the stop block 3-15-5, and the stop block 3-15-5 is arranged on the ultrasonic anti-friction base 3- On both sides of 15-7, two sets of piezoelectric stack 3-15-4, piezoelectric stack boss 3-15-3 and stop 3-15-5 are relatively installed in the ultrasonic anti-friction component 3-15, In order to make the ultrasonic anti-friction base 3-15-7 generate radial vibration, the countersunk through holes 3-15-6 of the ultrasonic anti-friction assembly 3-15 are used for the capping device 3 on the capping machine mounting plate 2-12 The screw holes II 3-15-11 in the base of the ultrasonic anti-friction assembly 3-15 are screwed with the external threads 3-4-2 of the drive shaft; other components and other connection relations are the same as those in the first embodiment.

[0043] The working principle of the present invention is as follows:

[0044] Before the operation of the semi-automatic high-precision screw capping machine based on the ultrasonic anti-friction effect, adjust the capping device to the top of the bottle cap through the coarse adjustment mode of the lifting positioning system, and the distance is L, where the value of L The range is 10~15cm. In this embodiment, the distance L is 10cm, and the fine adjustment mode is used to realize the precise positioning of the capping device; after starting operation, an external excitation signal excites the piezoelectric element, and the output frequency of the excitation voltage reaches the stator base After the resonance frequency, based on the anti-friction effect of ultrasonic vibration, the friction coefficient between the inner threaded hole of the lower end of the stator base and the outer thread of the upper end of the threaded drive shaft is reduced to the critical unlocking condition, and the high-pressure gas passes through the air guide through the hole and the piston assembly Filled into the lower end of the inner cavity of the threaded drive shaft, the lower end of the inner cavity of the threaded drive shaft is pressurized and expanded, so that there is a pressure difference between the upper and lower ends of the inner cavity of the threaded drive shaft, thereby pushing the threaded drive shaft for motion output. At this time, the threaded drive shaft has two forms of motion: axial linear motion and rotation; the moment the bottle cap is installed, the external excitation signal and high-pressure gas are temporarily suspended at the same time, between the internal threaded hole of the lower end of the stator base and the external thread of the upper end of the threaded drive shaft The friction coefficient reaches the self-locking condition, and the capping device realizes self-locking, so that the threaded drive shaft quickly stops the motion output to prevent damage to the bottle cap; the external excitation signal and the input of high-pressure gas are restored again to reduce the friction of the capping device At the same time, the L-shaped through hole of the air guide is filled with high-pressure gas directly into the upper end of the threaded drive shaft cavity. The upper end of the threaded drive shaft cavity is pressurized and expanded to make the upper and lower ends of the threaded drive shaft air pressure appear. The pressure difference pushes the threaded drive shaft to move and realizes the reset movement of the capping device.

[0045] In summary, the lifting positioning system of the present invention realizes the precise positioning of the capping device through the combination of coarse and fine adjustment modes; the capping device utilizes the anti-friction rotation of the threaded drive shaft and the high pressure drive of the pneumatic system, Realizes the integration of the axial linear movement and the rotation of the capping device; the capping device generates ultrasonic vibration through the piezoelectric element on the stator base to control the self-locking and unlocking of the thread pair, and can realize the thread driving Accurate control of the axis behavior; the capping device only needs to replace the capping head model and the input signal parameters of the piezoelectric element when switching between different specifications of the bottle type, which can save a lot of adjustment time and equipment costs, and improve the working efficiency of the whole machine. The design is more humane. The invention not only solves the technical problems of low capping efficiency and imperfect capping of the traditional capping machine, but also can realize the high-precision positioning of the capping machine, greatly improve the stability of the capping machine, extend its service life, and reduce production. cost. It has outstanding promotion value and broad market prospects in the daily chemical, food, pharmaceutical and other industries.