Suction nozzle rod rotating shaft direct connection motor type rotating mechanism for SMT chip mounter

Abstract

The invention discloses a suction nozzle rod rotating shaft direct connection motor type rotating mechanism for an SMT chip mounter, which comprises a tool seat, a plurality of sliding seats are uniformly distributed on the tool seat along the length direction, suction nozzle rods are arranged on the sliding seats, lifting parts are arranged on the tool seat corresponding to the positions of the sliding seats, and two ends of each suction nozzle rod are respectively an adsorption end and a rotating end. The rotating end is coaxially connected with a direct connection motor, a transmission seat is arranged on the tool seat, penetrating holes allowing the adsorption ends to penetrate through are formed in the positions, corresponding to the suction nozzle rods, of the transmission seat, and vibration buffering pieces used for buffering the axial acting force borne by the suction nozzle rods when the suction nozzle rods suck and release materials and bear the axial acting force are arranged on the penetrating holes. According to the invention, the problems that the rotation precision of the suction nozzle rod has errors to influence the surface mounting precision due to the tooth skipping phenomenon caused by the cooperation of the traditional transmission wheel and the transmission belt, and the service life of the motor shaft is damaged due to the fact that the acting force is fed back to the motor shaft when the suction nozzle rod is loaded by the acting force when the motor drives the suction nozzle rod to lift back and forth to suck and release materials are solved.

Description

Technical Field

[0001] The invention relates to the technical field of chip placement mechanisms for SMT chip placement machines, in particular to a nozzle rod rotating shaft directly connected to a motor rotating mechanism for an SMT chip placement machine. Background Art

[0002] In the operation system of SMT placement machine, the rotation mechanism of nozzle rod plays a decisive role in the accuracy and efficiency of placement operation. The traditional nozzle rod adopts R-axis synchronous wheel rotation mechanism, which is mainly composed of motor, synchronous wheel, synchronous belt, tensioner, nozzle rod sleeve, nozzle rod and steel ball.

[0003] When working, the motor spindle rotates first, driving the synchronous wheel to rotate, and then the synchronous belt starts to move. The synchronous belt drives the nozzle rod sleeve to rotate by the synchronous teeth on the nozzle rod sleeve, and finally the nozzle rod sleeve drives the nozzle rod to rotate by the cooperation of the keyway and the steel ball. When the synchronous belt is not tight enough, the tensioner can be used to adjust its tightness. However, this traditional belt transmission structure has many defects that are difficult to overcome.

[0004] On the one hand, when the motor is in high-speed forward and reverse rotation, tooth jumping frequently occurs between the synchronous belt teeth and the synchronous wheel teeth, and transmission gaps are inevitably generated between the steel balls on the spline bearing and the keyways. The accumulation of multiple layers of gaps makes the entire transmission structure unable to meet the requirements of high-precision transmission, which has a serious negative impact on the angular position placement accuracy of tiny electronic components, making it difficult to meet the quality standards of the patches.

[0005] On the other hand, in the actual operation process, when the motor seat moves downward, the motor, nozzle cover and nozzle will move downward together. When the nozzle is sucking or mounting materials, once the nozzle touches the PCB board through the material, an upward thrust will be generated. Since the nozzle is directly connected to the motor shaft, the thrust will cause the bearing inside the motor to bear axial force. Given that the placement machine needs to move up and down at high speed for a long time to transport materials, the number of downward pressures per hour is as high as more than 5,000 times. Such frequent and high-intensity downward pressure will be continuously transmitted to the motor shaft and bearings, greatly shortening the service life of the motor, and additionally increasing the maintenance cost and downtime of the equipment, seriously hindering the continuity and stability of production, reducing the overall production efficiency, and failing to meet the current electronics manufacturing industry's urgent needs for high-precision and high-efficiency placement operations. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a motor-type rotating mechanism with a nozzle rod rotating shaft directly connected to a SMT placement machine, which solves the problem that the traditional transmission wheel and transmission belt are prone to tooth jumping, resulting in errors in the rotation accuracy of the nozzle rod, thereby affecting the patch placement accuracy, and the nozzle rod is loaded with force when the motor drives the nozzle rod to lift and lift reciprocatingly to suck and release materials, causing the force to be fed back to the motor shaft and damaging the service life of the motor shaft.

[0007] To achieve the above-mentioned purpose, the present invention provides a suction nozzle rod rotating shaft directly connected to a motor rotating mechanism for an SMT placement machine, including a tooling seat for installation on an external placement machine, the tooling seat is evenly distributed with a plurality of sliding seats along its length direction, each of the sliding seats is provided with a suction nozzle rod, and the tooling seat is provided with a lifting member corresponding to each sliding seat position for driving the sliding seat to perform lifting and lowering movements along the height direction of the tooling seat, the two ends of the suction nozzle rod are respectively an adsorption end and a rotating end, the rotating end is coaxially connected with a directly connected motor for driving the suction nozzle rod to perform axial rotation, a transmission seat is provided on the tooling seat, and a through hole for the suction end to pass through is opened corresponding to each suction nozzle rod position on the transmission seat, and a vibration-damping member is provided on the through hole for reducing the axial force applied to the suction nozzle rod when the suction nozzle rod is subjected to axial force when sucking and releasing materials.

[0008] The advantages of adopting the above technical solution are as follows: First, the tooling seat is firmly installed at the designated position of the external SMT machine to ensure that the entire rotating mechanism is accurately positioned and firmly installed. Each sliding seat is pre-installed with the nozzle rod. At this time, the direct motor and the rotating end of the nozzle rod have completed the coaxial connection, and the vibration damping part is also assembled in the corresponding perforation of the transmission seat; when the SMT machine starts working, according to the SMT layout set by the production task, the corresponding lifting part on the tooling seat is started, driving the sliding seat to rise and fall along the height direction of the tooling seat, driving the nozzle rod to move accurately to the appropriate height position above the material to be sucked, and preparing for the adsorption of the material; after the nozzle rod reaches the specified height, its adsorption end contacts the material, and generates suction through the built-in negative pressure device (conventional configuration of the SMT machine, not the core component of this mechanism, which is the existing technology, so it is not mentioned in detail), firmly adsorbing the material; the direct motor receives the control signal, drives the nozzle rod to rotate around the axis, and adjusts the adsorbed material to the preset angle direction to meet the strict requirements of the angle of components during SMT. Then, the lifting part drives the nozzle rod down again to accurately mount the material on the corresponding position of the PCB board. During the process of the nozzle rod descending to mount the material, if the nozzle rod is subjected to an upward axial force from the material or PCB board, the vibration damping part at the perforation of the transmission seat will immediately play a role, absorbing and buffering the force through its own elastic deformation, avoiding direct impact on the motor shaft, maintaining the stable operation of the motor shaft, and preparing for the next suction and discharge cycle. The entire operation process is repeated to efficiently complete the SMT patch operation.

[0009] The above technical structure abandons the traditional synchronous wheel and synchronous belt transmission structure, and adopts a direct-connected motor to directly drive the suction nozzle rod for axial rotation. Since the tooth jumping phenomenon that is easy to occur between the synchronous belt teeth and the synchronous wheel teeth, and the transmission gap caused by the cooperation of the steel ball and the keyway on the spline bearing are eliminated, the rotation accuracy of the suction nozzle rod is greatly improved, which can meet the high-precision angular position mounting requirements of tiny electronic components and effectively improve the quality of the mounting. At the same time, when the suction nozzle rod sucks and releases materials, it will inevitably be subjected to axial force. The mechanism is provided with a vibration damping part at the perforation of the transmission seat. When the suction nozzle rod is subjected to the axial thrust from the material , the vibration damping part can timely buffer and disperse the force, and avoid the force directly feeding back to the motor shaft. Compared with the technology in which the suction nozzle is directly connected to the motor shaft in the traditional mechanism or the force is transmitted to the motor shaft of the lifting motor through the transmission gear structure, the frequent axial force leads to the shortening of the motor bearing life. The present invention can significantly extend the service life of the motor shaft, reduce the downtime maintenance time caused by motor failure, and ensure the continuity of production; and the tooling seat is evenly distributed with multiple sliding seats along the length direction, each sliding seat is equipped with a suction nozzle rod, and a corresponding lifting member is set to drive the suction nozzle rod to move up and down along the height direction. This design enables the suction nozzle rod to flexibly operate accurately at different positions and heights, adapt to the diverse patch layout requirements, and improve the overall adaptability of the patch machine to different production tasks. With higher mounting accuracy, the defective rate caused by patch position deviation is reduced, and the rework process is reduced. At the same time, the stable and durable motor shaft reduces the frequency of sudden equipment failures, making the production process smoother and more stable, without frequent interruptions to production for maintenance, and comprehensively improving the production efficiency of the SMT patch machine.

[0010] The present invention further provides: a synchronization groove is circumferentially provided on the inner circumferential wall of the through hole, and the synchronization groove has swing grooves extending toward the outer wall and the inner wall of the transmission seat, the two swing grooves are arranged opposite to each other, a movable ring is movably provided in the synchronization groove, a synchronization sleeve is movably provided in the through hole along the axis direction of the through hole for improving the smoothness of the lifting and lowering of the suction nozzle rod, the synchronization sleeve is sleeved on the outer circumferential wall of the suction nozzle rod, the movable ring passes through a movable hole for the synchronization sleeve to be inserted and moved, a first helical tooth is circumferentially provided on the outer circumferential wall of the synchronization sleeve, and a second helical tooth for meshing with the first helical tooth to drive the movable ring to rotate when the suction nozzle rod is lifted or lowered is circumferentially provided on the inner circumferential wall of the movable hole, the damper is arranged in the swing groove and cooperates with the movable ring so that the damper bears part of the force acting on the suction nozzle rod when the movable ring rotates.

[0011] The benefits of adopting the above technical solution are: after the equipment is assembled, the movable ring is located in the synchronization groove, the synchronization sleeve is arranged on the outer peripheral wall of the suction nozzle rod, and a part of the synchronization sleeve is placed in the movable hole of the movable ring. At this time, the first spiral teeth and the second spiral teeth are engaged with each other, and the vibration damping part has been installed in the swing groove, ready to work at any time; when the placement machine issues an instruction to drive the suction nozzle rod to rise or fall, since the synchronization sleeve is sleeved on the suction nozzle rod, the suction nozzle rod drives the synchronization sleeve to move synchronously along the direction of the perforation axis. During the movement of the synchronous sleeve, the first spiral teeth on its outer peripheral wall interact with the second spiral teeth on the inner peripheral wall of the movable hole to drive the movable ring to rotate in the synchronous groove. When the movable ring rotates, it cooperates with the vibration damping part, that is, when the suction nozzle rod descends and sucks and releases the material to contact the PCB board to be processed, the suction end touches the PCB board to generate an upward reaction force, which is transmitted to the synchronous sleeve and then transmitted to the movable ring through the spiral teeth. The movable ring cooperates with the vibration damping part to transmit part of the force to the vibration damping part to avoid all the force directly acting on the motor shaft. After the suction nozzle rod completes the discharge, the control instruction of the placement machine will drive the suction nozzle rod to rise through the lifting part. When the suction nozzle rod rises, it drives the synchronous sleeve to move up so that the movable ring rotates and resets, thereby realizing the disengagement of the vibration damping part from the movable ring. After the suction nozzle rod completes a suction and discharge action, the above-mentioned lifting and buffering process will be repeated continuously. Each lifting of the suction nozzle rod is accompanied by the rotation of the movable ring and the buffering action of the vibration damping part, which repeats over and over again to ensure the entire SMT The nozzle rod of the placement machine runs stably and accurately under frequent operations, realizing efficient placement operations; through the setting of the above-mentioned technology, when the nozzle rod is subjected to axial force, based on the helical tooth meshing design of the synchronous sleeve and the movable ring, the lifting and lowering action of the nozzle rod will be converted into the rotation of the movable ring. At this time, the vibration damping member arranged in the swing groove cooperates with the movable ring to cleverly disperse and buffer the axial force. Compared with the traditional method of directly relying on the vibration damping member for buffering, this structure extends the buffering path of the force with the help of the rotation of the movable ring, more efficiently reduces the axial force transmitted to the motor shaft, and further guarantees the service life of the motor shaft; the movable ring is restricted to move in the synchronous groove and the extended swing groove, which The multi-directional limiting structure allows the movable ring to always maintain a stable posture when it rotates under force, avoiding the impact of shaking or offset on the vibration reduction effect, and indirectly maintaining the stability of the relative position of the synchronous sleeve and the suction nozzle rod, so that the entire suction and discharge system can still operate stably and reliably in long-term and high-frequency operations, reducing failures and precision deviations caused by structural instability; by more effectively buffering the axial force on the suction nozzle rod, the impact on the motor shaft, suction nozzle rod and related transmission components is greatly reduced, reducing the risk of wear and deformation of components due to frequent force impact, extending the service life of each component, reducing equipment maintenance costs and replacement frequency, and improving the overall durability and economy of the equipment.

[0012] The present invention is further provided that: the vibration-damping component includes a vibration-damping spring arranged in the swing groove, the radial cross-section of the vibration-damping spring is arranged in an "M" shape and the vibration-damping spring forms a vibration-damping groove, the outer peripheral wall of the movable ring extends toward the direction of two adjacent swing grooves to have a paddle that is placed into the vibration-damping groove after the movable ring rotates a certain angle, and the vibration-damping spring is made of elastic material.

[0013] The above technical solution is beneficial in that: as the movable ring rotates a certain angle, the paddle gradually approaches and is finally placed in the damping groove of the damping spring, and begins to squeeze the damping spring. Since the damping spring is made of elastic material, it undergoes elastic deformation under the extrusion of the paddle, and the "M"-shaped structure begins to shrink, converting the axial force on the nozzle rod into its own elastic potential energy for storage, reducing the force transmitted to the motor shaft, and when the nozzle rod completes a suction and discharge action, the lifting part receives the command applied by the placement machine and drives the nozzle rod to rise and reset, so that the paddle is separated from the damping groove, and at the same time, the damping spring returns to its original state by its own elasticity, releases the stored elastic potential energy, and helps push the paddle back to the vicinity of the initial position, and the movable ring also returns to the initial rotation angle, and the whole process repeats itself, ensuring that each time the nozzle rod is operated, it can obtain stable buffer protection and maintain stable operation of the equipment; the damping spring adopts a special design with an "M"-shaped radial cross section, which can provide a larger elastic deformation space than ordinary damping structures. When the pick squeezes the vibration-absorbing spring as the movable ring rotates, the "M"-shaped structure can make full use of its own elastic deformation to absorb the axial force on the nozzle rod, and efficiently convert the impact force into the elastic potential energy of the spring, thereby minimizing the transmission of the force to the motor shaft, effectively protecting the motor shaft and extending its service life. The vibration-absorbing spring is made of elastic material and has stable and predictable mechanical properties. The paddle extending from the outer wall of the movable ring is accurately placed in the vibration damping groove after the movable ring rotates a certain angle. This precise matching mechanism ensures the consistency and stability of the buffering action. Every time the nozzle rod is subjected to axial force, a reliable and uniform buffering effect can be obtained to avoid the shaking of the nozzle rod due to uneven buffering, which helps to maintain the high precision of the nozzle rod during operation. At the same time, the vibration damping part is cleverly integrated in the limited space of the swing groove, and the buffering function is achieved by the cooperation of the paddle and the vibration damping groove without occupying too much extra space. The entire SMT placement machine nozzle rod rotating axis directly connected to the motor-type rotating mechanism still maintains a relatively compact structural layout, which is convenient for layout and installation in the limited installation space of the placement machine, and is conducive to the miniaturization and integration of the equipment.

[0014] The present invention further provides that: both inner walls of the vibration damping groove are raised with abutment protrusions, the abutment protrusions are made integrally with the vibration damping spring piece, the two abutment protrusions are arranged opposite to each other and the gap between the two abutment protrusions is matched to form a vibration damping gap for the pick to be placed.

[0015] The benefit of adopting the above technical solution is that the damping gap formed between the abutting protrusions provides a precise insertion space for the pick. When the movable ring rotates and the pick enters the damping gap, the limiting effect of the gap can ensure that the pick and the damping spring are in precise contact every time, making the buffering action stable and repeatable. This precise positioning avoids the uneven force caused by the deviation of the buffering contact position, maintains the stability of the suction nozzle rod during the lifting process, and ensures the high precision of the patch operation. The abutting protrusions on the inner walls of both sides of the damping groove are made into one piece with the damping spring, which not only strengthens the structural strength of the damping spring, but also cleverly reduces the contact area between the pick and the damping spring. When the pick squeezes the damping spring, the force is concentrated on the damping gap, which makes it easier to cause the damping spring to undergo efficient elastic deformation, thereby further improving the absorption and buffering capacity of the axial force of the suction nozzle rod, and better protecting the motor shaft from the impact force. The one-piece abutting protrusions and damping springs reduce the weak points of the connection between the components, and reduce the risk of loosening and falling off of the components due to long-term and frequent force. At the same time, the precise damping gap makes the damping spring force more uniform and reasonable, reduces the local stress concentration phenomenon, effectively delays the time when the damping spring performance declines due to fatigue, significantly prolongs the service life of the damping parts, and reduces the equipment maintenance cost. The relatively set abutment protrusions allow the damping spring to maintain a more stable posture in the swing groove. Even if it is repeatedly squeezed by the paddle, it can still maintain its own structural stability and avoid abnormal conditions such as excessive displacement and distortion of the damping spring. This helps to ensure the stable operation of the entire damping mechanism, indirectly improves the overall reliability of the nozzle rod rotating axis mechanism, and ensures the continuous and stable operation of the SMT placement machine.

[0016] The present invention further provides that: the top wall and the inner wall of the paddle are connected to the side wall of the paddle in a smooth curved surface and are formed with abutting surfaces for abutting against the abutting protrusions.

[0017] The advantages of adopting the above technical solution are that the top wall, inner wall and side wall of the paddle are connected by a smooth curved surface to form an abutment surface. This curved surface design can achieve a smooth transition between the surfaces when the paddle contacts the abutment protrusion. Compared with a rigid right-angle connection, the curved surface contact can disperse the force more evenly, avoid stress concentration on local sharp points, reduce component wear, make the force transmission during the buffering process smoother and softer, and improve the stability and reliability of the buffering action. The smooth abutment surface reduces the friction resistance between the paddle and the abutment protrusion. When the movable ring rotates to cause the paddle to quickly approach and abut the abutment protrusion, the paddle can slide into the vibration-damping gap more quickly, triggering the deformation of the vibration-damping spring. This speeds up the response speed of the entire buffering mechanism, ensuring that once the nozzle rod is subjected to an axial force, the vibration-damping component can intervene immediately, and more efficiently protect the motor shaft from damage caused by sudden impact forces.

[0018] The present invention is further provided that: the synchronous sleeve is penetrated by a limiting hole along its height direction for the suction nozzle rod to pass through, a first convex edge is arranged on the outer peripheral wall of the suction nozzle rod, the radial cross-section of the first convex edge is arranged in an arc shape, and a second convex edge is opened on the inner peripheral wall of the bottom of the limiting hole for abutting and cooperating with the first convex edge after the suction nozzle rod descends a certain distance.

[0019] The above technical solution is beneficial in that the limiting hole of the synchronous sleeve and the first convex edge of the outer peripheral wall of the nozzle rod and the second convex edge at the bottom of the limiting hole form a precise limiting structure. When the nozzle rod drops to a certain distance, the first convex edge and the second convex edge abut and cooperate, which can accurately control the stroke of the nozzle rod to descend, and avoid the nozzle rod from causing damage to the material or the PCB board below due to excessive downward pressure, which greatly guarantees the position accuracy of material placement in the patch operation, and helps to improve the yield rate of the entire SMT patch process. At the same time, after the nozzle rod drops a certain distance, the first convex edge and the second convex edge abut and cooperate, so that when the nozzle rod continues to descend, it will drive the synchronous sleeve to move downward, but the synchronous sleeve rotates relative to the nozzle rod through the cooperation of the first spiral tooth and the second spiral tooth, that is, the downward trend is transformed into a rotation trend, and then the movable ring is driven to rotate when the synchronous sleeve rotates, so as to achieve the separation or insertion of the paddle and the damping groove.

[0020] The present invention further provides that: the first flange bottom wall is provided with a plurality of balls for contacting the second flange top wall.

[0021] The advantages of adopting the above technical solution are: the provision of the ball improves the smoothness of the abutment between the first flange and the second flange, and reduces the friction resistance between the first flange and the second flange when the synchronous sleeve rotates relatively, thereby improving the rotation accuracy of the synchronous sleeve.

[0022] The present invention further provides that: a third convex edge is arranged on the outer peripheral wall of the suction nozzle rod, and a fourth convex edge is opened on the inner peripheral wall of the top of the limiting hole for abutting and cooperating with the third convex edge after the suction nozzle rod rises a certain distance.

[0023] The above technical solution is beneficial in that: a third convex edge is set on the outer wall of the nozzle rod, and a fourth convex edge is set on the top of the synchronous sleeve limit hole. The abutment formed by the two realizes the precise control of the rising stroke of the nozzle rod. Combined with the previous limit structure for the descending stroke, it can fully and accurately limit the moving range of the nozzle rod in the up and down directions, prevent the nozzle rod from rising too much and leaving the established working area, or from falling too much and causing collision damage, and ensure that the nozzle rod operates stably within the preset safety stroke, thereby improving the accuracy and stability of the patch operation. At the same time, when the nozzle rod rises, the third convex edge and the fourth convex edge cooperate to realize the rotation reset of the synchronous sleeve, thereby driving the rotation reset of the movable ring, thereby realizing the separation of the paddle and the vibration damping groove, and avoiding the influence of the rising reset of the nozzle rod.

[0024] The present invention further provides that: adjacent directly connected motors are arranged in staggered positions.

[0025] The benefit of adopting the above technical solution is that the adjacent direct-connected motor positions are staggered, which can more efficiently utilize the limited installation space on the fixture. In SMT placement machines, the compactness of the layout of each component is very important. The staggered arrangement avoids the space crowding caused by the centralized arrangement of the direct-connected motors, so that the entire rotating mechanism can easily accommodate more nozzle rods and supporting motors without increasing the volume of the fixture, which helps to realize the miniaturization and integrated design of the placement machine. Under the premise of staggered direct-connected motor positions, the nozzle rod length can be increased to adapt to the staggered direct-connected motors, thereby ensuring that the suction ends of several nozzle rods are on the same horizontal line.

[0026] The present invention is further configured as follows: a driving wheel and a driven wheel are arranged on the tooling seat, a transmission belt is provided between the driving wheel and the driven wheel, the sliding seat is connected to any side of the belt body of the transmission belt, the transmission direction of the transmission belt is arranged to be consistent with the height direction of the tooling seat, the lifting member includes a driving motor, and the output end of the driving motor is connected to the driving wheel.

[0027] The above technical solution is beneficial in that the driving motor drives the active wheel, and then drives the driven wheel through the transmission belt to realize the lifting and lowering control of the sliding seat. The transmission direction of the transmission belt is consistent with the height direction of the tooling seat. This design can provide accurate and stable linear lifting and lowering movement for the nozzle rod. Compared with some complex lifting mechanisms, the stability of the belt drive helps to reduce the shaking and deviation of the nozzle rod during the lifting and lowering process, thereby ensuring the position accuracy of the nozzle when sucking and placing materials, and improving the yield rate of the patch operation; the transmission system composed of the active wheel, the driven wheel and the transmission belt is more compact than the use of multiple sets of independent lifting devices. They are integrated on the tooling seat, without the need for additional large lifting components, effectively saving the installation space inside the patch machine. At the same time, the compact structure also means a shorter transmission link, which reduces the energy loss during power transmission, improves the energy utilization efficiency of the drive motor, and makes the nozzle rod respond more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional view of the present invention; Figure 2 for Figure 1 Partial 3D view; Figure 3 for Figure 2 3D view after removing the transmission seat; Figure 4 for Figure 2 A cross-sectional view of Figure 5 for Figure 4 A partial enlarged view of part A. DETAILED DESCRIPTION

[0029] The present invention provides a rotating mechanism of a suction nozzle rod 2 for an SMT placement machine, which is directly connected to a motor 23 by a rotating axis, and comprises a tooling seat 1 for being installed on an external placement machine, wherein the tooling seat 1 is evenly distributed with a plurality of sliding seats 11 along its length direction, and each of the sliding seats 11 is provided with a suction nozzle rod 2, and the tooling seat 1 is provided with a lifting member for driving the sliding seat 11 to perform lifting and lowering movements along the height direction of the tooling seat 1 corresponding to each position of the sliding seat 11, and the two ends of the suction nozzle rod 2 are respectively an adsorption end 21 and a rotating end 22, and the rotating end 22 is coaxially connected with a directly connected motor 23 for driving the suction nozzle rod 2 to perform axial rotation, and a transmission seat 12 is provided on the tooling seat 1, and a through hole 1 for the suction end 21 to penetrate is opened on the transmission seat 12 corresponding to each position of the suction nozzle rod 2 21, a damping member is provided on the through hole 121 for reducing the axial force on the suction nozzle rod 2 when the suction nozzle rod 2 is subjected to an axial force when sucking and releasing materials, a synchronous groove 122 is circumferentially opened on the inner circumferential wall of the through hole 121, and the synchronous groove 122 extends with a swing groove 123 toward the outer wall and the inner wall of the transmission seat 12, and the two swing grooves 123 are arranged oppositely, and a movable ring 3 is movably arranged in the synchronous groove 122, and a synchronous sleeve 4 for improving the smoothness of the lifting and lowering of the suction nozzle rod 2 is movably arranged in the through hole 121 along the axial direction of the through hole 121, and the synchronous sleeve 4 is sleeved on the outer circumferential wall of the suction nozzle rod 2, and the movable ring 3 is penetrated by an active hole 31 for the synchronous sleeve 4 to be placed and moved, and a first spiral tooth 41 is circumferentially opened on the outer circumferential wall of the synchronous sleeve 4, The inner circumferential wall of the movable hole 31 is circumferentially provided with a second spiral tooth 311 for engaging with the first spiral tooth 41 to drive the movable ring 3 to rotate when the suction nozzle rod 2 is lifted or lowered. The damping member is arranged in the swinging groove 123 and cooperates with the movable ring 3 so that the damping member bears part of the force exerted on the suction nozzle rod 2 when the movable ring 3 rotates. The damping member includes a damping spring piece 32 arranged in the swinging groove 123. The radial cross-section of the damping spring piece 32 is arranged in an "M" shape and a damping groove 321 is formed on the damping spring piece 32. The outer circumferential wall of the movable ring 3 extends toward the direction of two adjacent swinging grooves 123 with a paddle 33 for being placed in the damping groove 321 after the movable ring 3 rotates a certain angle. The damping spring piece 32 is made of elastic material, and the inner walls on both sides of the damping groove 321 The two abutting protrusions 322 are respectively raised with an abutting protrusion 322, and the abutting protrusion 322 is made of one piece with the damping spring piece 32. The two abutting protrusions 322 are arranged opposite to each other and the gap between the two abutting protrusions 322 is matched to form a damping gap for the pick 33 to be placed. The top wall and the inner wall of the pick 33 are connected to the side wall of the pick 33 in a smooth curved surface and are formed with an abutting surface 331 for abutting against the abutting protrusion 322. The synchronous sleeve 4 is penetrated by a limiting hole 42 for the nozzle rod 2 to pass through along its height direction. The outer peripheral wall of the nozzle rod 2 is provided with a first flange 24, and the radial cross-section of the first flange 24 is arranged in an arc shape. The inner peripheral wall of the bottom of the limiting hole 42 is provided with a second flange 421 for abutting and matching with the first flange 24 after the nozzle rod 2 drops a certain distance.The bottom wall of the first flange 24 is provided with a plurality of balls 241 for contacting the top wall of the second flange 421, the outer peripheral wall of the nozzle rod 2 is provided with a third flange 25, and the inner peripheral wall of the top of the limiting hole 42 is provided with a fourth flange 43 for abutting and cooperating with the third flange 25 after the nozzle rod 2 rises a certain distance. The adjacent direct-connected motors 23 are arranged in a staggered manner, and the tooling seat 1 is provided with a driving wheel 5 and a driven wheel 51. A transmission belt 52 is provided between the driving wheel 5 and the driven wheel 51. The sliding seat 11 is connected to any side of the transmission belt 52. The transmission direction of the transmission belt 52 is consistent with the height direction of the tooling seat 1. The lifting member includes a driving motor 53, and the output end of the driving motor 53 is connected to the driving wheel 5.

[0030] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A suction nozzle rod rotating shaft directly connected to a motor rotating mechanism for an SMT placement machine, comprising a tooling seat for installation on an external placement machine, the tooling seat is evenly distributed with a plurality of sliding seats along its length direction, each of the sliding seats is provided with a suction nozzle rod, the tooling seat is provided with a lifting member for driving the sliding seat to move up and down along the height direction of the tooling seat corresponding to each sliding seat position, the two ends of the suction nozzle rod are respectively an adsorption end and a rotating end, and the characteristics are: The rotating end is coaxially connected with a direct-connected motor for driving the suction nozzle rod to rotate axially. A transmission seat is arranged on the tooling seat. A through hole for the adsorption end to pass through is opened on the transmission seat corresponding to each suction nozzle rod position. The through hole is provided with a vibration-damping member for reducing the axial force applied to the suction nozzle rod when the suction nozzle rod is subjected to axial force when sucking and releasing materials.

2. According to claim 1, a nozzle rod rotating shaft directly connected to a motor type rotating mechanism for an SMT placement machine, characterized in that: A synchronization groove is circumferentially provided on the inner circumferential wall of the through hole, and the synchronization groove has swing grooves extending toward the outer wall and the inner wall of the transmission seat. The two swing grooves are arranged opposite to each other, and a movable ring is movably provided in the synchronization groove. A synchronization sleeve is movably provided in the through hole along the axis direction of the through hole for improving the smoothness of the lifting and lowering of the suction nozzle rod. The synchronization sleeve is sleeved on the outer circumferential wall of the suction nozzle rod, and the movable ring passes through a movable hole for the synchronization sleeve to be inserted and moved. A first helical tooth is circumferentially provided on the outer circumferential wall of the synchronization sleeve, and a second helical tooth for meshing with the first helical tooth to drive the movable ring to rotate when the suction nozzle rod is lifted or lowered is circumferentially provided on the inner circumferential wall of the movable hole. The vibration damper is arranged in the swing groove and cooperates with the movable ring so that the vibration damper bears part of the force acting on the suction nozzle rod when the movable ring rotates.

3. According to claim 2, a nozzle rod rotating shaft directly connected to a motor type rotating mechanism for an SMT placement machine, characterized in that: The vibration-damping component includes a vibration-damping spring arranged in a swinging groove. The radial cross-section of the vibration-damping spring is "M"-shaped and a vibration-damping groove is formed on the vibration-damping spring. The outer peripheral wall of the movable ring extends toward the two adjacent swinging grooves to have a paddle that is inserted into the vibration-damping groove after the movable ring rotates a certain angle. The vibration-damping spring is made of elastic material.

4. The SMT placement machine nozzle rod rotating shaft directly connected to the motor type rotating mechanism according to claim 3, characterized in that: The inner walls on both sides of the vibration damping groove are protruded with abutment protrusions, the abutment protrusions are made integrally with the vibration damping spring piece, the two abutment protrusions are arranged opposite to each other and the gap between the two abutment protrusions is matched to form a vibration damping gap for the pick to be placed.

5. The SMT placement machine nozzle rod rotating shaft directly connected to the motor type rotating mechanism according to claim 4, characterized in that: The top wall and the inner wall of the paddle are connected to the side wall of the paddle in a smooth curved surface and are formed with abutting surfaces for abutting against the abutting protrusions.

6. The SMT placement machine nozzle rod rotating shaft directly connected to the motor type rotating mechanism according to claim 2, characterized in that: The synchronous sleeve is penetrated by a limiting hole along its height direction for the suction nozzle rod to pass through, and a first convex edge is arranged on the outer peripheral wall of the suction nozzle rod, and the radial cross-section of the first convex edge is arranged in an arc shape, and the inner peripheral wall at the bottom of the limiting hole is provided with a second convex edge for abutting and cooperating with the first convex edge after the suction nozzle rod is lowered a certain distance.

7. The SMT placement machine nozzle rod rotating shaft directly connected to the motor type rotating mechanism according to claim 6, characterized in that: The first flange bottom wall is provided with a plurality of balls for contacting the second flange top wall.

8. The SMT placement machine nozzle rod rotating shaft directly connected to the motor type rotating mechanism according to claim 7, characterized in that: A third convex edge is arranged on the outer peripheral wall of the suction nozzle rod, and a fourth convex edge is arranged on the inner peripheral wall at the top of the limiting hole for abutting and cooperating with the third convex edge after the suction nozzle rod rises a certain distance.

9. The SMT placement machine nozzle rod rotating shaft directly connected to the motor type rotating mechanism according to claim 1, characterized in that: The positions of adjacent directly connected motors are staggered.

10. The SMT placement machine nozzle rod rotating shaft directly connected to the motor type rotating mechanism according to claim 1, characterized in that: A driving wheel and a driven wheel are arranged on the tooling seat, a transmission belt is arranged between the driving wheel and the driven wheel, the sliding seat is connected to any side of the belt body of the transmission belt, the transmission direction of the transmission belt is consistent with the height direction of the tooling seat, the lifting member includes a driving motor, and the output end of the driving motor is connected to the driving wheel.

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