Automatic loading drilling system
Patent Information
- Application Number
- CN202511606372.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-05
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2045-11-05
AI Technical Summary
[0003]为了克服现有的钻孔设备效率低,耗费人力成本高的不足,本发明提供了自动上件式钻孔系统
[0014] The present application has the advantages that the shell is moved to the picking position by the shell horizontal input mechanism and the shell misalignment mechanism, the shell is adjusted in the up-down direction by the shell up-down direction adjusting mechanism, the shell to be processed is placed on the shell carrier by the shell carrying mechanism, and the processed shell is placed on the shell horizontal output mechanism, the shell is fixed at the center position of the shell carrier by the shell positioning mechanism and the shell pressing mechanism, the shell is punched by the hole drilling mechanism, and the hole is cleaned by the hole cleaning mechanism.
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Figure CN121061206B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of gimbals, in particular to an automatic feeding type drilling system. BACKGROUND
[0002] During the production and processing of product shells, it is necessary to drill holes in them. However, the existing drilling equipment has low automation and requires high labor costs. For example, application number CN202110414383.7 discloses a drilling and tapping machine, which includes a base, a saddle, a column, a workbench, a tool magazine, and a main shaft box that can slide up and down on one side of the column. The column and the base are in a T-shaped structure, and the saddle is fixedly installed on the base. The saddle includes a first guide rail and a second guide rail that is set on the first guide rail and can slide along the extension direction of the first guide rail. The first guide rail and the second guide rail are perpendicular to each other. The workbench is installed on the second guide rail and can slide along the extension direction of the second guide rail. The tool magazine is connected to the main shaft box and moves up and down with the main shaft box. For example, application number CN201610778690.2 discloses a drilling and tapping machine, which includes a machine body that includes a base and a column. A sliding table is movably connected to a guide rail. A clamp is installed on the upper end of the sliding table, and a workpiece is installed on the clamp. A main shaft is movably connected to the column. A drilling device and a tapping device are arranged at the lower end of the main shaft. The drilling device includes a drilling multi-axis device, and the tapping device includes a tapping multi-axis device. SUMMARY
[0003] In order to overcome the low efficiency and high labor cost of the existing drilling equipment, the present application provides an automatic feeding type drilling system.
[0004] The technical scheme adopted by the present application to solve its technical problems is: an automatic feeding type drilling system, comprising a machine shell horizontal input mechanism, a machine shell misalignment mechanism, a machine shell up-down orientation mechanism, a machine shell carrying mechanism, a machine shell carrier, a machine shell horizontal plane orientation mechanism, a machine shell positioning mechanism, a machine shell pressing mechanism, a hole cleaning mechanism, a tapping mechanism, a machine shell horizontal output mechanism and a carrier horizontal movement mechanism, the machine shell misalignment mechanism is arranged at the discharge end of the machine shell horizontal input mechanism, the machine shell up-down orientation mechanism is arranged between the machine shell misalignment mechanism and the machine shell carrying mechanism, the machine shell carrying mechanism is arranged below the carrier horizontal movement mechanism and the machine shell horizontal output mechanism, the moving part of the carrier horizontal movement mechanism is fixed with the machine shell carrier, the machine shell carrier is provided with the machine shell horizontal plane orientation mechanism, the rotating part of the machine shell horizontal plane orientation mechanism is provided with the machine shell positioning mechanism and the machine shell pressing mechanism, the hole cleaning mechanism is arranged on the carrier horizontal movement mechanism, the tapping mechanism is arranged on one side of the carrier horizontal movement mechanism, and the machine shell horizontal input mechanism, the machine shell misalignment mechanism, the machine shell up-down orientation mechanism, the machine shell carrying mechanism, the machine shell carrier, the machine shell horizontal plane orientation mechanism, the machine shell positioning mechanism, the machine shell pressing mechanism and the hole cleaning mechanism are all communicatively connected to the PLC.
[0005] According to another embodiment of the present application, the machine shell up-down orientation mechanism further comprises a rotary air cylinder, an L-shaped rod, a servo motor, a four-jaw chuck and a support block, the output shaft of the rotary air cylinder is fixed on the rod body of the L-shaped rod, the end of the L-shaped rod is fixed with the body of the servo motor, the output shaft of the servo motor is fixed on the body of the four-jaw chuck, and the fingers of the four-jaw chuck are fixed with the support block.
[0006] According to another embodiment of the present application, the machine shell carrying mechanism further comprises a horizontal linear module, a lifting electric cylinder, a suction cup and a CCD camera, the sliding seat of the horizontal linear module is fixed with the cylinder body of the lifting electric cylinder, the suction cup is fixed on the piston rod of the lifting electric cylinder, and the CCD camera is fixed on the cylinder body of the lifting electric cylinder.
[0007] According to another embodiment of the present application, the machine shell positioning mechanism further comprises a box body, inclined linear waist holes, support rods, a linear cylinder body, sliding seats, a base block, a linear sliding groove, transmission wheels, a transmission belt and a motor, two transmission wheels are rotationally connected in the linear cylinder body, the output shaft of the motor is fixed on one transmission wheel, the two transmission wheels are engaged on the transmission belt, the transmission belt is fixed on the two sliding seats, the sliding seats are slidingly connected on the linear cylinder body, the base block is fixed on the sliding seat, the linear sliding groove is arranged on the base block, the linear sliding groove is perpendicular to the linear cylinder body, the bottom ends of the two support rods are slidingly connected in one linear sliding groove, four center-symmetrical inclined linear waist holes are arranged on the cover plate of the box body, and the four support rods pass through the four inclined linear waist holes.
[0008] According to another embodiment of the present application, the further comprising the shell pressing mechanism comprises rotating down pressure cylinders and pressing blocks, cylinder bodies of two rotating down pressure cylinders are fixed on the front and rear sides of the box respectively, and the output rod ends of the rotating down pressure cylinders are fixed with the pressing blocks.
[0009] According to another embodiment of the present application, the further comprising the hole cleaning mechanism comprises an arc-shaped track, a base, rollers, a blowing nozzle, a second CCD camera, a gear, an arc-shaped gear rack and a gear rotating motor, a plurality of rollers are rotatably connected to the base, the plurality of rollers are matched on the inner and outer sides of the arc-shaped track, the blowing nozzle, the second CCD camera and the gear rotating motor are installed on the base, a gear is fixed on the output shaft of the gear rotating motor, the gear is engaged with the arc-shaped gear rack, and the arc-shaped gear rack is fixed on the arc-shaped track.
[0010] According to another embodiment of the present application, the further comprising the hole cleaning mechanism comprises an arc-shaped track, a base, rollers, a blowing nozzle, a second CCD camera, a gear, an arc-shaped gear rack and a gear rotating motor, a plurality of rollers are rotatably connected to the base, the plurality of rollers are matched on the inner and outer sides of the arc-shaped track, the blowing nozzle, the second CCD camera and the gear rotating motor are installed on the base, a gear is fixed on the output shaft of the gear rotating motor, the gear is engaged with the arc-shaped gear rack, and the arc-shaped gear rack is fixed on the arc-shaped track.
[0011] According to another embodiment of the present application, the further comprising the shell horizontal input mechanism and the carrier horizontal movement mechanism are belt conveyors, and the shell carrier is fixed on the transmission belt of the carrier horizontal movement mechanism.
[0012] According to another embodiment of the present application, the further comprising the shell horizontal plane direction adjusting mechanism is a protractor disc, and the box is fixed on the rotating disc of the protractor disc.
[0013] According to another embodiment of the present application, the further comprising the shell misalignment mechanism comprises a single-rod cylinder and a straight flow channel, the cylinder body of the single-rod cylinder is fixed on one side of the straight flow channel, and a push block is fixed on the piston rod of the single-rod cylinder and arranged in the straight flow channel.
[0014] The present application has the advantages that the shell is moved to the picking position by the shell horizontal input mechanism and the shell misalignment mechanism, the shell is adjusted in the up-down direction by the shell up-down direction adjusting mechanism, the shell to be processed is placed on the shell carrier by the shell carrying mechanism, and the processed shell is placed on the shell horizontal output mechanism, the shell is fixed at the center position of the shell carrier by the shell positioning mechanism and the shell pressing mechanism, the shell is punched by the hole drilling mechanism, and the hole is cleaned by the hole cleaning mechanism. BRIEF DESCRIPTION OF DRAWINGS
[0015] The present application is further described below in conjunction with the drawings and embodiments.
[0016] Figure 1 is a structural schematic diagram of the present application;
[0017] Figure 2Is the structure diagram of the box cover plate of the casing positioning mechanism of the present application;
[0018] Figure 3 Is the structure diagram of the linear cylinder body, sliding seat one and base block of the casing positioning mechanism of the present application.
[0019] Fig. 1. Casing horizontal input mechanism, 2. Casing misalignment mechanism, 3. Casing up-down orientation mechanism, 4. Casing carrying mechanism, 5. Casing carrier, 6. Casing horizontal plane orientation mechanism, 7. Casing positioning mechanism, 8. Casing pressing mechanism, 9. Hole cleaning mechanism, 10. Drilling mechanism, 11. Casing horizontal output mechanism, 12. Carrier horizontal movement mechanism, 21. Single-rod air cylinder, 22. Linear flow channel, 31. Rotary air cylinder, 32. L-shaped rod, 33. Servo motor, 34. Four-jaw chuck, 35. Support block, 41. Horizontal linear module, 42. Lifting electric cylinder, 43. Suction cup, 44. CCD camera, 71. Box body, 72. Oblique linear waist hole, 73. Support rod, 74. Linear cylinder body, 75. Sliding seat one, 76. Base block, 77. Linear sliding groove, 78. Transmission wheel, 79. Transmission belt, 91. Arc-shaped track, 92. Base, 93. Roller, 94. Air blowing nozzle, 95. CCD camera two, 101. Electric cylinder, 102. Motor, 103. Drill bit. DETAILED DESCRIPTION
[0020] Figure 1 Is the structure diagram of the present application; Figure 2 Is the structure diagram of the box cover plate of the casing positioning mechanism of the present application; Figure 3 Is the structure diagram of the linear cylinder body, sliding seat one and base block of the casing positioning mechanism of the present application.
[0021] As attached Figure 1As shown, an automatic feeding type drilling system comprises a shell horizontal input mechanism 1, a shell misalignment mechanism 2, a shell up-down orientation mechanism 3, a shell carrying mechanism 4, a shell carrier 5, a shell horizontal plane orientation mechanism 6, a shell positioning mechanism 7, a shell pressing mechanism 8, a hole cleaning mechanism 9, a tapping mechanism 10, a shell horizontal output mechanism 11, and a carrier horizontal movement mechanism 12. The shell misalignment mechanism 2 is arranged at the discharge end of the shell horizontal input mechanism 1. The shell up-down orientation mechanism 3 is arranged between the shell misalignment mechanism 2 and the shell carrying mechanism 4. The shell carrying mechanism 4 is arranged below the carrier horizontal movement mechanism 12 and the shell horizontal output mechanism 11. The moving part of the carrier horizontal movement mechanism 12 is fixed with the shell carrier 5. The shell horizontal plane orientation mechanism 6 is arranged on the shell carrier 5. The shell positioning mechanism 7 and the shell pressing mechanism 8 are arranged on the rotating part of the shell horizontal plane orientation mechanism 6. The hole cleaning mechanism 9 is arranged on the carrier horizontal movement mechanism 12. The tapping mechanism 10 is arranged on one side of the carrier horizontal movement mechanism 12. The shell horizontal input mechanism 1, the shell misalignment mechanism 2, the shell up-down orientation mechanism 3, the shell carrying mechanism 4, the shell carrier 5, the shell horizontal plane orientation mechanism 6, the shell positioning mechanism 7, the shell pressing mechanism 8, the hole cleaning mechanism 9, and the tapping mechanism 10 are all communicatively connected to the PLC.
[0022] The shell up-down orientation mechanism 3 comprises a rotary air cylinder 31, an L-shaped rod 32, a servo motor 33, a four-jaw chuck 34, and a support block 35. The output shaft of the rotary air cylinder 31 is fixed to the rod body of the L-shaped rod 32. The end of the L-shaped rod 32 is fixed with the body of the servo motor 33. The output shaft of the servo motor 33 is fixed to the body of the four-jaw chuck 34. The fingers of the four-jaw chuck 34 are fixed with the support block 35.
[0023] When the output shaft of the rotary air cylinder 31 drives the four-jaw chuck 34 to swing to the shell misalignment mechanism 2 through the L-shaped rod 32, the four-jaw chuck 34 is placed in the shell. Then the four-jaw chuck 34 drives the four support blocks 35 to open outward, thereby abutting against the inner wall of the shell. Then the rotary air cylinder 31 drives the four-jaw chuck 34 to swing in the opposite direction, thereby driving the opening of the shell to face downward and the top end to face upward.
[0024] The shell carrying mechanism 4 comprises a horizontal linear module 41, a lifting electric cylinder 42, a suction cup 43, and a CCD camera 44. The slide of the horizontal linear module 41 and the cylinder body of the lifting electric cylinder 42 are fixed together. The piston rod of the lifting electric cylinder 42 is fixed with the suction cup 43. The cylinder body of the lifting electric cylinder 42 is fixed with the CCD camera 44.
[0025] The horizontal linear module 41 can drive the suction cup 43 to move horizontally and linearly. The lifting electric cylinder 42 can drive the suction cup 43 to move upward and downward linearly. The CCD camera 44 can capture the image information of the shell below and transmit it to the PLC, so that the PLC controls the horizontal linear module 41 to align the shell.
[0026] With reference to the accompanying drawings Figure 2 and the accompanying drawings Figure 3 As shown in the drawings, the casing positioning mechanism 7 comprises a box 71, four oblique linear waist holes 72, two supporting rods 73, a linear cylinder 74, two sliding seats 75, two base blocks 76, two linear sliding grooves 77, two transmission wheels 78, a transmission belt 79 and a motor. The two transmission wheels 78 are rotatably connected in the linear cylinder 74, the output shaft of the motor is fixed on one of the transmission wheels 78, the two transmission wheels 78 are engaged on the transmission belt 79, the transmission belt 79 is fixed on the two sliding seats 75 respectively, the sliding seats 75 are slidably connected on the linear cylinder 74, the base blocks 76 are fixed on the sliding seats 75, the linear sliding grooves 77 are arranged on the base blocks 76 and are perpendicular to the linear cylinder 74, the bottom ends of the two supporting rods 73 are slidably connected in one of the linear sliding grooves 77, and the cover plate of the box 71 is provided with four oblique linear waist holes 72 which are symmetrically arranged and through which the four supporting rods 73 pass.
[0027] The motor drives the transmission wheels 78 to rotate, so as to drive the transmission belt 79 to move along the two transmission wheels 78, thereby pulling the two sliding seats 75 to move oppositely or relatively along the linear cylinder 74. When the two sliding seats 75 move oppositely or relatively inward, the four supporting rods 73 move oppositely or relatively inward along the four linear sliding grooves 77 and move to the center along the four oblique linear waist holes 72. When the two sliding seats 75 move oppositely or relatively outward, the four supporting rods 73 move oppositely or relatively outward along the four oblique linear waist holes 72.
[0028] In the initial state, the four supporting rods 73 are close to each other, at this time, the casing is placed, so that the four supporting rods 73 are arranged in the casing. Finally, the four supporting rods 73 are opened outward, so as to tightly support the casing from the inside.
[0029] The casing pressing mechanism 8 comprises two rotating down-pressing cylinders and pressing blocks. The cylinder bodies of the two rotating down-pressing cylinders are fixed on the front and rear sides of the box 71 respectively, and the output rods of the rotating down-pressing cylinders are fixed with the pressing blocks.
[0030] When the casing is positioned, the rotating down-pressing cylinders drive the pressing blocks to press the casing on the box 71.
[0031] The hole cleaning mechanism 9 comprises an arc-shaped track 91, a base 92, a plurality of rollers 93, a blowing nozzle 94, a CCD camera 95, a gear, an arc-shaped rack, and a gear rotating motor. The base 92 is rotatably connected with the plurality of rollers 93, the plurality of rollers 93 are arranged on the inner and outer sides of the arc-shaped track 91, the base 92 is provided with the blowing nozzle 94, the CCD camera 95 and the gear rotating motor, the output shaft of the gear rotating motor is fixed with the gear, the gear is engaged with the arc-shaped rack, and the arc-shaped rack is fixed on the arc-shaped track 91.
[0032] The gear rotating motor drives the gear to rotate, the gear will roll along the arc-shaped rack, and when the base 92 moves along the arc-shaped track 91, several rollers 93 will roll along the arc-shaped track 91. The air pump blows air through the air nozzle 94, which can blow away the dirt on the hole of the shell. The CCD camera two 95 can take the image information of the shell, and input the image into the PLC, and the PLC judges whether the hole of the shell is clean.
[0033] The drilling mechanism 10 includes an electric cylinder 101, a motor 102, and a drill bit 103. The piston rod of the electric cylinder 101 is fixed with the body of the motor 102, and the output shaft of the motor 102 is fixed with the drill bit 103.
[0034] The electric cylinder 101 drives the motor 102 and the drill bit 103 to move forward, and the motor 102 drives the drill bit 103 to rotate, so as to drill holes in the front shell.
[0035] The shell horizontal input mechanism 1 and the carrier horizontal movement mechanism 12 are belt conveyors, and the shell carrier 5 is fixed on the transmission belt of the carrier horizontal movement mechanism 12.
[0036] The shell horizontal plane orientation mechanism 6 is a protractor, and the box 71 is fixed on the rotating disc of the protractor. The shell horizontal plane orientation mechanism 6 can drive the box 71 and the shell positioned on the box 71 to rotate in the horizontal plane, so as to drill holes on different sides.
[0037] The shell misalignment mechanism 2 includes a single-rod air cylinder 21 and a straight flow channel 22. The cylinder body of the single-rod air cylinder 21 is fixed on one side of the straight flow channel 22, and the piston rod of the single-rod air cylinder 21 is fixed with a push block, which is arranged in the straight flow channel 22.
[0038] The working mode of the present application is that the shell horizontal input mechanism 1 moves the shells with the openings upward one by one in a straight line. When the shell moves into the straight flow channel 22 of the shell misalignment mechanism 2, the single-rod air cylinder 21 pushes the shell to move forward to the picking position.
[0039] Then the shell up-down orientation mechanism 3 turns the shell over after grabbing it, so that the opening of the shell faces downward. Then the shell carrying mechanism 4 places the shell on the shell positioning mechanism 7 after sucking it, so as to position the shell accurately. Then the shell pressing mechanism 8 presses the shell. Then the drilling mechanism 10 drills holes in the shell, and the shell horizontal plane orientation mechanism 6 rotates the shell to orient it, so as to drill holes in different sides of the shell. Then the hole cleaning mechanism 9 cleans the drilled holes, and finally the shell carrying mechanism 4 takes away the processed shell and places it on the shell horizontal output mechanism 11.
Claims
1. An automatic loading drilling system characterized by, Including shell horizontal input mechanism (1), shell dislocation mechanism (2), shell up and down direction mechanism (3), shell carrying mechanism (4), shell carrier (5), shell horizontal plane direction mechanism (6), shell positioning mechanism (7), shell pressing mechanism (8), hole cleaning mechanism (9), hole drilling mechanism (10), shell horizontal output mechanism (11), carrier horizontal movement mechanism (12), the discharge end of shell horizontal input mechanism (1) is provided with shell dislocation mechanism (2), shell up and down direction mechanism (3) is located between shell dislocation mechanism (2) and shell carrying mechanism (4), shell carrying mechanism (4) is provided with carrier horizontal movement mechanism (12) and shell horizontal output mechanism (11) below, the moving part of carrier horizontal movement mechanism (12) is fixed with shell carrier (5), shell carrier (5) is installed with shell horizontal plane direction mechanism (6), shell horizontal plane direction mechanism (6) is installed with shell positioning mechanism (7) and shell pressing mechanism (8) on the rotating part, hole cleaning mechanism (9) is installed on carrier horizontal movement mechanism (12), one side of carrier horizontal movement mechanism (12) is provided with hole drilling mechanism (10), shell horizontal input mechanism (1), shell dislocation mechanism (2), shell up and down direction mechanism (3), shell carrying mechanism (4), shell carrier (5), shell horizontal plane direction mechanism (6), shell positioning mechanism (7), shell pressing mechanism (8), hole cleaning mechanism (9), hole drilling mechanism (10) are all connected in communication on PLC;Shell up and down direction mechanism (3) and shell horizontal plane direction mechanism (6) cooperate, so that the shell can be controlled to rotate in vertical and horizontal directions;The shell positioning mechanism (7) includes a box (71), an inclined straight waist hole (72), a support rod (73), a straight cylinder (74), a sliding seat (75), a base block (76), a straight sliding groove (77), a transmission wheel (78), a transmission belt (79), a motor, two transmission wheels (78) are rotatably connected in the straight cylinder (74), the output shaft of the motor is fixed on one transmission wheel (78), the two transmission wheels (78) are engaged on the transmission belt (79), the transmission belt (79) is fixed on the two sliding seats (75) on both sides, the sliding seat (75) is slidingly connected on the straight cylinder (74), the base block (76) is fixed on the sliding seat (75), the straight sliding groove (77) is arranged on the base block (76), the straight sliding groove (77) is perpendicular to the straight cylinder (74), the bottom ends of the two support rods (73) are slidingly connected in a straight sliding groove (77), four center symmetric inclined straight waist holes (72) are arranged on the cover plate of the box (71), and the four support rods (73) pass through the four inclined straight waist holes (72) respectively.
2. The automatic loading drill system of claim 1, wherein, The upper and lower adjusting mechanism (3) of the shell comprises a rotary cylinder (31), an L-shaped rod (32), a servo motor (33), a four-jaw chuck (34) and a support block (35). The output shaft of the rotary cylinder (31) is fixed on the rod body of the L-shaped rod (32), the end of the L-shaped rod (32) is fixed with the body of the servo motor (33), the output shaft of the servo motor (33) is fixed on the body of the four-jaw chuck (34), and the fingers of the four-jaw chuck (34) are fixed with the support block (35).
3. The automatic loading drill system of claim 1 wherein, The shell carrying mechanism (4) comprises a horizontal linear module (41), a lifting electric cylinder (42), a suction cup (43) and a CCD camera (44). The slide seat of the horizontal linear module (41) and the cylinder body of the lifting electric cylinder (42) are fixed together, the suction cup (43) is fixed on the piston rod of the lifting electric cylinder (42), and the CCD camera (44) is fixed on the cylinder body of the lifting electric cylinder (42).
4. The automatic loading drill system of claim 1 wherein, The shell pressing mechanism (8) comprises rotary down-pressing cylinders and pressing blocks. The cylinder bodies of the two rotary down-pressing cylinders are fixed on the front and rear sides of the box body (71), and the output rods of the rotary down-pressing cylinders are fixed with the pressing blocks.
5. The automatic loading drill system of claim 1 wherein, The hole cleaning mechanism (9) comprises an arc-shaped track (91), a base (92), rollers (93), air blow nozzles (94), a second CCD camera (95), a gear, an arc-shaped rack and a gear rotating motor. The base (92) is rotatably connected with a plurality of rollers (93), the plurality of rollers (93) are matched on the inner and outer sides of the arc-shaped track (91), the base (92) is provided with the air blow nozzles (94), the second CCD camera (95) and the gear rotating motor, the output shaft of the gear rotating motor is fixed with the gear, the gear is engaged with the arc-shaped rack, and the arc-shaped rack is fixed on the arc-shaped track (91).
6. The automatic loading drill system of claim 1 wherein, The hole drilling mechanism (10) comprises an electric cylinder (101), a motor (102) and a drill bit (103). The piston rod of the electric cylinder (101) is fixed with the body of the motor (102), and the output shaft of the motor (102) is fixed with the drill bit (103).
7. The automatic loading drill system of claim 1 wherein, The shell horizontal input mechanism (1) and the carrier horizontal moving mechanism (12) are belt conveyors, and the shell carrier (5) is fixed on the transmission belt of the carrier horizontal moving mechanism (12).
8. The automatic loading drill system of claim 1 wherein, The shell horizontal plane adjusting mechanism (6) is a protractor, and the box body (71) is fixed on the rotating disc of the protractor.
9. The automatic loading drill system of claim 1 wherein, The shell misalignment mechanism (2) comprises a single-rod cylinder (21) and a straight flow channel (22). The cylinder body of the single-rod cylinder (21) is fixed on one side of the straight flow channel (22), and the piston rod of the single-rod cylinder (21) is fixed with a push block, which is arranged in the straight flow channel (22).
Citation Information
Patent Citations
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CN112975448A
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CN215966389U