An automatic correction nozzle assembly for SMT placement machine

Abstract

The present invention discloses an automatic correction nozzle assembly for an SMT placement machine, which relates to the field of nozzle assemblies for placement machines, and includes a base, a mounting body, a nozzle body, a cleaning mechanism, a collecting mechanism, and a positioning mechanism. The present invention docks the connection seat of the outer wall of the bottom end of the nozzle body with the material by setting a positioning mechanism. At this time, the counterweight block at the bottom end of the connection seat will contact the material, and the counterweight block will be subjected to an upward thrust. The counterweight block will drive the sleeve and the connecting rod to move downward, so that the movable ring connected to the connecting rod will contact the material. At this time, the movable ring, the counterweight block, and the bottom end of the nozzle body will be flush, and the negative pressure will vacuum adsorb the material through the opening of the nozzle body, the connecting pipe, and the adsorption port. When the material moves to the required position, the negative pressure disappears, and the material will give the material a downward thrust under the action of the deadweight of the counterweight block, thereby reducing the gap between the material and the predetermined position, and further reducing the probability of the material being offset.

Description

Technical Field

[0001] The invention relates to the field of nozzle components for chip mounters, in particular to an automatic correction nozzle component for an SMT chip mounter. Background Art

[0002] The placement machine is placed after the dispensing machine or screen printer in the production line. It is a device that accurately places surface mount components on the PCB pads by moving the placement head. The fully automatic placement machine is used to achieve high-speed, high-precision and fully automatic placement of components. It is the most critical and complex equipment in the entire SMT production. The placement machine is the main equipment in the SMT production line. The placement machine has developed from the early low-speed mechanical placement machine to the high-speed optical alignment placement machine, and has developed towards multi-functional, flexible connection modularization.

[0003] The existing suction nozzle is generally connected to the die-bonding motor through a mounting body, and then calibrated through computer program control, so that the material is vacuum-adsorbed by the nozzle of the SMT placement machine. After long-term use, dust will remain inside the suction nozzle, which will interfere with the lens on the die-bonding motor and cause a decrease in accuracy. When the suction nozzle adsorbs the material, there is a certain gap between the suction nozzle and the material, which causes the material to shift during the adsorption and installation process. Therefore, the present invention proposes an automatic correction nozzle assembly for an SMT placement machine. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic correction nozzle assembly for an SMT placement machine in order to solve the problem that the existing nozzle may deviate from the predetermined installation position when transferring the material.

[0005] To achieve the above object, the present invention provides the following technical solution: an automatic correction nozzle assembly for an SMT placement machine, comprising a base, a mounting body is fixedly connected to the bottom end of the base, and a nozzle body is rotatably connected to the outer wall of the mounting body through a thread;

[0006] A cleaning mechanism is arranged inside the nozzle body and is used to clean the inside of the nozzle body. The cleaning mechanism includes a movable block, a resisting block, and a filter screen. The movable block is arranged inside the nozzle body, and the resisting block is fixedly connected to the top of the movable block. The filter screen is fixedly connected inside the nozzle body and is located above the movable block.

[0007] A collecting mechanism is arranged outside the nozzle body and extends to the inner wall of the base, and is used to collect dust. The collecting mechanism includes a collecting box and a material guide trough. The collecting box is rotatably connected to the outer wall of the nozzle body by bolts, and the material guide trough is arranged on the inner wall of the nozzle body and extends to the inside of the nozzle body.

[0008] A positioning mechanism is arranged on the outside of the bottom end of the base and is used to position the material. The positioning mechanism includes a connecting seat, a connecting pipe, a movable ring, and a suction port. The connecting seat is fixedly mounted on the outer wall of the bottom end of the suction nozzle body, the connecting pipe is connected to the outer wall of the connecting seat and penetrates into the interior of the suction nozzle body, the movable ring is arranged on the inner side of the connecting seat, and the top of the movable ring is provided with a suction port that penetrates to the bottom end of the movable ring.

[0009] As a further solution of the present invention: the cleaning mechanism also includes a limiting groove and a positioning block, the limiting groove is arranged on the inner side of the filter, the positioning block is located at the bottom end of the filter and penetrates into the interior of the filter, the outer wall of the positioning block is fixedly connected with a limiting block extending to the inner side of the limiting groove, and the outer wall of the positioning block is located inside the filter and fixedly connected with a cleaning rod.

[0010] As a further solution of the present invention: the collection mechanism also includes a movable rod slidably connected to the inner wall of the suction nozzle body and extending to the inside of the collection box, one end of the movable rod is connected to a partition, the bottom end of the movable rod is provided with a positioning rod passing through the bottom end of the movable rod, and the top side of the positioning rod is connected to an elastic block.

[0011] As a further solution of the present invention: the positioning mechanism also includes a counterweight block slidably connected to the inner wall of the connecting seat, the outer wall of the counterweight block is hinged with a sleeve, and the inner wall of the sleeve is sleeved with a connecting rod that penetrates to the outside of the sleeve.

[0012] As a further solution of the present invention: a plurality of limit strips are arranged on the inner side of the limit slot, the plurality of limit strips are evenly distributed on the inner side of the limit slot, the outer wall of the limit strip is in a sloped state, and the top end of the limit strip is in a sloped state.

[0013] As a further solution of the present invention: the outer wall of the limit block is consistent with the gap between the two limit strips, and the movable block, the stop block, the filter screen and the positioning block are in a hollow state.

[0014] As a further solution of the present invention: the top and bottom ends of the movable block are both conical, the stop block is divided into two layers, grooves matching the moving trajectory of the positioning block and the cleaning rod are arranged between the stop blocks, and the outer wall of the lower layer of the stop block is inclined.

[0015] As a further solution of the present invention: the inner wall of the suction nozzle body is provided with a slide groove matching the moving trajectory of the movable rod, the cross section of the positioning rod is an "L"-shaped structure, and the bottom end of the material guide groove coincides with the moving trajectory of the partition.

[0016] As a further solution of the present invention: the cross-section of the counterweight block is in a "T" shape, the bottom end of the counterweight block is a rubber pad, the bottom end of the movable ring is in an inclined state, and one end of the movable ring coincides with the moving trajectory of the counterweight block.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. By setting up a cleaning mechanism, when the material is adsorbed by negative pressure, the negative pressure simultaneously gives an upward force to the movable block and the resisting block, so that the top of the resisting block gives a thrust to the positioning block. The movement of the positioning block will drive the limit block to move along the gap between the limit slots, and the limit block and the positioning block will also rotate within a certain range under the action of the inclined slots between the limit slots until the bottom end of the limit block contacts the bottom end of the limit slot. When the negative pressure disappears, the limit block will enter the gap between the next group of limit slots under the action of the inclined surface, driving the cleaning rod to rotate, thereby achieving the purpose of cleaning the dust on the inner wall of the filter screen;

[0019] 2. By setting up a collection mechanism, when the dust on the inner wall of the filter is cleaned, the dust will gradually approach the port of the guide trough under the action of the inclined surface of the filter and fall into the interior of the collection box. At this time, the movable block will return to its original position after the negative pressure disappears, and the outer wall of the movable block will contact one end of the movable rod, giving pressure to the movable rod, so that the movable rod moves along the outer wall of the positioning rod, and giving pressure to the elastic block. The movement of the movable rod will also move the top partition, so that the partition no longer overlaps with the lower port of the guide trough, so that the dust enters the interior of the collection box through the lower port of the guide trough, thereby achieving the purpose of collecting dust;

[0020] 3. By setting a positioning mechanism, the connecting seat on the outer wall of the bottom end of the suction nozzle body is connected to the material. At this time, the counterweight block at the bottom end of the connecting seat will contact the material, and the counterweight block will be subjected to an upward thrust. The counterweight block will drive the sleeve and the connecting rod to move downward, so that the movable ring connected to the connecting rod will contact the material. At this time, the movable ring, the counterweight block, and the bottom end of the suction nozzle body will be flush, and the negative pressure will vacuum adsorb the material through the opening of the suction nozzle body and the connecting pipe and the adsorption port. When the material moves to the required position, the negative pressure disappears, and the material will be given a downward thrust under the action of the counterweight block, thereby reducing the gap between the material and the predetermined position, further reducing the probability of material displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 A cross-sectional view of the internal structure of the nozzle body of the present invention;

[0023] Figure 3 It is a cross-sectional view of the internal structure of the filter screen of the present invention;

[0024] Figure 4It is a schematic diagram of the structure of the cleaning rod of the present invention;

[0025] Figure 5 It is a partial enlarged view of point A of the present invention;

[0026] Figure 6 It is a partial enlarged view of B of the present invention;

[0027] Figure 7 It is a partial enlarged view of point C of the present invention.

[0028] In the figure: 1. base; 2. mounting body; 3. nozzle body; 4. cleaning mechanism; 401. movable block; 402. stop block; 403. filter screen; 404. limiting groove; 405. positioning block; 406. limiting block; 407. cleaning rod; 5. collecting mechanism; 501. collecting box; 502. material guide trough; 503. movable rod; 504. partition; 505. positioning rod; 506. elastic block; 6. positioning mechanism; 601. connecting seat; 602. connecting pipe; 603. counterweight block; 604. sleeve; 605. connecting rod; 606. movable ring; 607. suction port. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 7 In an embodiment of the present invention, an automatic correction nozzle assembly for an SMT placement machine includes a base 1, a mounting body 2 is fixedly connected to the bottom end of the base 1, and a nozzle body 3 is rotatably connected to the outer wall of the mounting body 2 through a thread;

[0031] The cleaning mechanism 4 is arranged inside the nozzle body 3 and is used to clean the inside of the nozzle body 3. The cleaning mechanism 4 includes a movable block 401, a stop block 402, and a filter screen 403. The movable block 401 is arranged inside the nozzle body 3, and the stop block 402 is fixedly connected to the top of the movable block 401. The filter screen 403 is fixedly connected inside the nozzle body 3 and is located above the movable block 401.

[0032] The collecting mechanism 5 is arranged outside the nozzle body 3 and extends to the inner wall of the base 1, and is used to collect dust. The collecting mechanism 5 includes a collecting box 501 and a material guide trough 502. The collecting box 501 is rotatably connected to the outer wall of the nozzle body 3 by bolts, and the material guide trough 502 is arranged on the inner wall of the nozzle body 3 and extends to the inside of the nozzle body 3;

[0033] The positioning mechanism 6 is arranged on the outside of the bottom end of the base 1 and is used to position the material. The positioning mechanism 6 includes a connecting seat 601, a connecting tube 602, a movable ring 606, and a suction port 607. The connecting seat 601 is fixedly installed on the outer wall of the bottom end of the suction nozzle body 3, the connecting tube 602 is connected to the outer wall of the connecting seat 601 and penetrates into the interior of the suction nozzle body 3, the movable ring 606 is arranged on the inner side of the connecting seat 601, and the top of the movable ring 606 is provided with a suction port 607 that penetrates to the bottom end of the movable ring 606.

[0034] In this embodiment: when this device is used, the nozzle body 3 is moved to the top of the material through the crystal fixing motor, so that the connecting seat 601 on the outer wall of the bottom end of the nozzle body 3 is docked with the material, and the material is adsorbed under the action of the adsorption port 607 and the bottom end of the nozzle body 3. At the same time, after adsorption, the dust inside the filter 403 is cleaned under the action of the cleaning mechanism 4 and the collecting mechanism 5.

[0035] Please refer to Figure 2-5 The cleaning mechanism 4 also includes a limiting groove 404 and a positioning block 405. The limiting groove 404 is arranged on the inner side of the filter 403. The positioning block 405 is located at the bottom end of the filter 403 and penetrates into the interior of the filter 403. The outer wall of the positioning block 405 is fixedly connected with a limiting block 406 extending to the inner side of the limiting groove 404. The outer wall of the positioning block 405 is located inside the filter 403 and is fixedly connected with a cleaning rod 407.

[0036] In this embodiment: when the material is adsorbed by negative pressure, the negative pressure simultaneously gives an upward force to the movable block 401 and the resistance block 402, so that the top of the resistance block 402 gives a thrust to the positioning block 405. The movement of the positioning block 405 will drive the limit block 406 to move along the gap between the limit grooves 404, and the limit block 406 and the positioning block 405 will also rotate within a certain range under the action of the inclined grooves between the limit grooves 404 until the bottom end of the limit block 406 contacts the bottom end of the limit groove 404. When the negative pressure disappears, the limit block 406 will enter the gap between the next group of limit grooves 404 under the action of the inclined surface, driving the cleaning rod 407 to rotate, thereby achieving the purpose of cleaning the dust on the inner wall of the filter 403.

[0037] Please refer to Figure 2 and Figure 6 The collecting mechanism 5 also includes a movable rod 503 which is slidably connected to the inner wall of the nozzle body 3 and extends to the inside of the collecting box 501, one end of the movable rod 503 is connected to a partition plate 504, the bottom end of the movable rod 503 is provided with a positioning rod 505 which passes through the bottom end of the movable rod 503, and the top side of the positioning rod 505 is connected to an elastic block 506.

[0038] In this embodiment: when the dust on the inner wall of the filter 403 is cleaned, the dust will gradually approach the port of the guide trough 502 under the action of the inclined surface of the filter 403 and fall into the interior of the collection box 501. At this time, the movable block 401 will also return to its original position after the negative pressure disappears, and the outer wall of the movable block 401 will contact one end of the movable rod 503, giving pressure to the movable rod 503, so that the movable rod 503 moves along the outer wall of the positioning rod 505, and giving pressure to the elastic block 506. The movement of the movable rod 503 will also move the top partition plate 504, so that the partition plate 504 no longer overlaps with the lower port of the guide trough 502, so that the dust enters the interior of the collection box 501 through the lower port of the guide trough 502, thereby achieving the purpose of collecting dust.

[0039] Please refer to Figure 2 and Figure 7 The positioning mechanism 6 also includes a counterweight block 603 slidably connected to the inner wall of the connecting seat 601 , the outer wall of the counterweight block 603 is hinged with a sleeve 604 , and the inner wall of the sleeve 604 is sleeved with a connecting rod 605 that penetrates the outside of the sleeve 604 .

[0040] In this embodiment: the suction nozzle body 3 is moved to the top of the material through the crystal fixing motor, so that the connecting seat 601 on the outer wall of the bottom end of the suction nozzle body 3 is connected with the material. At this time, the counterweight block 603 at the bottom end of the connecting seat 601 will contact the material, and the suction nozzle body 3 continues to move downward to give the counterweight block 603 an upward thrust. The counterweight block 603 will drive the sleeve 604 and the connecting rod 605 to move downward, so that the movable ring 606 connected to the connecting rod 605 is in contact with the material. At this time, the movable ring 606, the counterweight block 603, and the bottom end of the suction nozzle body 3 will be flush, and the negative pressure will vacuum absorb the material through the opening of the suction nozzle body 3 and the connecting pipe 602 and the suction port 607, and move the material to the required position. At this time, the negative pressure disappears, and the material will give the material a downward thrust under the action of the counterweight block 603's own weight, thereby reducing the gap between the material and the predetermined position, further reducing the probability of the material shifting.

[0041] Please refer to Figure 2-5 A plurality of limit strips are arranged on the inner side of the limit groove 404, and the plurality of limit strips are evenly distributed on the inner side of the limit groove 404. The outer wall of the limit strip is in a bevel state, and the top of the limit strip is in a bevel state. The outer wall of the limit block 406 coincides with the gap between the two limit strips. The movable block 401, the stop block 402, the filter screen 403, and the positioning block 405 are hollow. The top and the bottom of the movable block 401 are both conical. The stop block 402 is divided into two layers. A groove matching the moving trajectory of the positioning block 405 and the cleaning rod 407 is arranged between the stop blocks 402, and the outer wall of the lower layer of the stop block 402 is in a bevel state.

[0042] In this embodiment: through this structure, the resistance block 402 and the movable block 401 can contact with the bottom end of the positioning block 405 under the action of negative pressure, giving the positioning block 405 an upward thrust, so that the positioning block 405 can rotate within a certain range under the action of the limiting strip on the inner side of the limiting groove 404, thereby driving the cleaning rod 407 to rotate, cleaning the filter 403, and the dust will gradually approach the guide groove 502 along the inclined surface of the filter 403.

[0043] Please refer to Figure 2 and Figure 6 The inner wall of the nozzle body 3 is provided with a slide groove matching the moving trajectory of the movable rod 503 , the cross section of the positioning rod 505 is an “L”-shaped structure, and the bottom end of the guide groove 502 coincides with the moving trajectory of the partition 504 .

[0044] In this embodiment: through this structure, when the resistance block 402 and the movable block 401 will contact the bottom end of the positioning block 405 under the action of negative pressure, the movable rod 503 and the positioning rod partition 504 will move under the action of the elastic block 506. At this time, the partition 504 will close the bottom end port of the material guide trough 502 to prevent dust from flowing back under the action of negative pressure.

[0045] Please refer to Figure 2 and Figure 7 The cross section of the counterweight block 603 is in a "T" shape, the bottom end of the counterweight block 603 is a rubber pad, the bottom end of the movable ring 606 is in an inclined state, and one end of the movable ring 606 coincides with the moving trajectory of the counterweight block 603.

[0046] In this embodiment: through this structure, when the material is moved to the required position, the negative pressure disappears, and the material will be given a downward thrust under the action of the counterweight block 603, thereby reducing the gap between the material and the predetermined position, further reducing the probability of material deviation.

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

Claims

1. An automatic correction nozzle assembly for an SMT placement machine, comprising a base (1), a mounting body (2) fixedly connected to the bottom end of the base (1), a nozzle body (3) rotatably connected to the outer wall of the mounting body (2) via a thread, characterized in that: a cleaning mechanism (4) arranged inside the suction nozzle body (3) and used for cleaning the inside of the suction nozzle body (3); the cleaning mechanism (4) comprises a movable block (401), a stop block (402), and a filter screen (403); the movable block (401) is arranged inside the suction nozzle body (3); the stop block (402) is fixedly connected to the top of the movable block (401); and the filter screen (403) is fixedly connected inside the suction nozzle body (3) and is located above the movable block (401); A collecting mechanism (5) is arranged outside the suction nozzle body (3) and extends to the inner wall of the base (1), and is used for collecting dust. The collecting mechanism (5) comprises a collecting box (501) and a material guide trough (502). The collecting box (501) is rotatably connected to the outer wall of the suction nozzle body (3) by means of bolts. The material guide trough (502) is arranged on the inner wall of the suction nozzle body (3) and extends to the interior of the suction nozzle body (3). A positioning mechanism (6) is arranged outside the bottom end of the base (1) and is used to position the material. The positioning mechanism (6) comprises a connecting seat (601), a connecting pipe (602), a movable ring (606), and a suction port (607). The connecting seat (601) is fixedly mounted on the outer wall of the bottom end of the suction nozzle body (3). The connecting pipe (602) is connected to the outer wall of the connecting seat (601) and penetrates into the interior of the suction nozzle body (3). The movable ring (606) is arranged on the inner side of the connecting seat (601). The top end of the movable ring (606) is provided with a suction port (607) penetrating to the bottom end of the movable ring (606). The cleaning mechanism (4) further comprises a limiting groove (404) and a positioning block (405); the limiting groove (404) is arranged on the inner side of the filter screen (403); the positioning block (405) is located at the bottom end of the filter screen (403) and penetrates into the inside of the filter screen (403); the outer wall of the positioning block (405) is fixedly connected to a limiting block (406) extending to the inner side of the limiting groove (404); the outer wall of the positioning block (405) is located inside the filter screen (403) and is fixedly connected to a cleaning rod (407); The collecting mechanism (5) further comprises a movable rod (503) slidably connected to the inner wall of the suction nozzle body (3) and extending into the interior of the collecting box (501); one end of the movable rod (503) is connected to a partition plate (504); a positioning rod (505) penetrating the bottom end of the movable rod (503) is provided at the bottom end of the movable rod (503); and a top side of the positioning rod (505) is connected to an elastic block (506); The positioning mechanism (6) further comprises a counterweight block (603) slidably connected to the inner wall of the connecting seat (601); a sleeve (604) is hingedly connected to the outer wall of the counterweight block (603); and a connecting rod (605) penetrating to the outside of the sleeve (604) is sleeved on the inner wall of the sleeve (604).

2. The automatic correction nozzle assembly for an SMT placement machine according to claim 1, characterized in that: A plurality of limit strips are arranged on the inner side of the limit slot (404), and the plurality of limit strips are evenly distributed on the inner side of the limit slot (404). The outer walls of the limit strips are in a beveled state, and the top ends of the limit strips are in a beveled state.

3. The automatic correction nozzle assembly for an SMT placement machine according to claim 2, characterized in that: The outer wall of the limit block (406) matches the gap between the two limit strips, and the movable block (401), the stop block (402), the filter screen (403), and the positioning block (405) are in a hollow state.

4. The automatic correction nozzle assembly for an SMT placement machine according to claim 2, characterized in that: The top and bottom ends of the movable block (401) are both in a conical state, the stop block (402) is divided into two layers, grooves matching the moving tracks of the positioning block (405) and the cleaning rod (407) are provided between the stop blocks (402), and the outer wall of the lower layer of the stop block (402) is in an inclined state.

5. The automatic correction nozzle assembly for an SMT placement machine according to claim 3, characterized in that: The inner wall of the nozzle body (3) is provided with a slide groove matching the moving trajectory of the movable rod (503); the cross section of the positioning rod (505) is in an "L"-shaped structure; the bottom end of the material guide groove (502) coincides with the moving trajectory of the partition plate (504).

6. The automatic correction nozzle assembly for an SMT placement machine according to claim 4, characterized in that: The cross section of the counterweight block (603) is in a "T" shape, the bottom end of the counterweight block (603) is a rubber pad, the bottom end of the movable ring (606) is in an inclined surface, and one end of the movable ring (606) coincides with the moving trajectory of the counterweight block (603).

Images