A passive feeder drive structure for a pick-and-place machine

Abstract

This invention discloses a passive feeder drive structure for a pick-and-place machine, belonging to the field of feeder technology. It includes a feeder section and a drive section. The feeder section includes a second mounting plate and a plurality of conveying teeth arranged in an equiangular circular array for driving the material belt movement. The conveying teeth are fixed to a synchronous wheel rotatably connected to the second mounting plate. A synchronously rotating meshing gear is provided on the axial side of the synchronous wheel. A swing rod extending to the outer side of the second mounting plate is provided on the coaxial side of the meshing gear. A first engaging block with a unidirectional engagement point at the middle of the swing rod is hinged to the swing rod. This invention ensures the stability of feeder feeding by using a passive feeder without an independent drive structure.

Description

Technical Field

[0001] This invention relates to a passive feeder drive structure for a pick-and-place machine, belonging to the field of pick-and-place machine feeder technology. Background Technology

[0002] When a pick-and-place machine is working, it needs to place materials onto designated positions on a PCB board. The component that supplies these materials is called a feeder. The stability of the feeder's material supply directly determines the stability of the pick-and-place machine during operation. Currently, there are two main types of feeders on the market: electric feeders and pneumatic feeders, each with its own disadvantages. 1. High cost of electric feeders: Currently, high-precision electric feeders on the market integrate a complete drive structure, resulting in high costs. 2. Insufficient stability of pneumatic feeders: The pneumatic structure cannot guarantee smooth acceleration and deceleration during feed. Because of this, when conveying some materials, components can easily stand upright in the conveyor belt.

[0003] Therefore, a passive feeder without an independent drive structure is needed to ensure the stability of feeder feeding. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a passive feeder drive structure for a pick-and-place machine, which provides a passive feeder without an independent drive structure.

[0005] The technical problem to be solved by the present invention is achieved by the following technical solution: a passive feeder drive structure for a chip mounter, comprising a feeder part and a drive part. The feeder part includes a second mounting plate and a plurality of conveying teeth arranged in an equiangular circumferential array for driving the material belt. The conveying teeth are fixed on a synchronous wheel that is rotatably connected to the second mounting plate. A meshing gear that rotates synchronously is provided on the axial side of the synchronous wheel. A swing rod with its end extending to the outside of the second mounting plate is provided on the coaxial side of the meshing gear. A first locking block with its end unidirectionally meshing with the outer teeth of the meshing gear is hinged to the middle of the swing rod. A first elastic element is provided on the first locking block for keeping the first locking block in constant contact with the meshing gear. The drive part pushes one end of the swing rod located on the outside of the second mounting plate to make the swing rod reciprocate on a fixed axis and drive the meshing gear to rotate unidirectionally.

[0006] The invention is further configured such that: a second locking block is hinged to the second mounting plate and engages unidirectionally with the outer teeth of the meshing gear; the meshing directions of the first locking block and the second locking block are the same; and a second elastic member is fixedly provided between the second locking block and the second mounting plate to maintain constant contact between the second locking block and the meshing gear.

[0007] The present invention is further configured such that: a first mounting plate is fixedly mounted on one side of the second mounting plate, and two sets of transmission wheels are rotatably mounted on the first mounting plate, and one set of transmission wheels is poweredly connected to the swing rod through a transmission structure.

[0008] The present invention is further configured such that: a set of transmission wheels connected to the transmission structure includes a first mounting wheel rotatably connected to a first mounting plate and a synchronizing rod rotatably connected to the first mounting wheel; the synchronizing rod engages unidirectionally with the outer teeth of the first mounting wheel; one end of the synchronizing rod is connected to the transmission structure; and an active engagement wheel that is clearance-fitted with another set of transmission wheels is fixedly provided on the first mounting wheel.

[0009] The invention is further configured such that: the transmission structure includes a first connecting rod hinged to a first mounting plate, a second connecting rod hinged to the swing rod and hinged to the first connecting rod, a sliding connecting rod with one end connected to the first connecting rod is linearly slidably disposed on the first mounting plate, a connecting channel is opened at the end of the sliding connecting rod away from the first connecting rod, and the end of the synchronizing rod extends into the connecting channel.

[0010] The present invention is further configured such that the driving unit includes: Base The conveyor belt assembly is mounted on the base. The fixed base connects to the conveyor belt assembly and follows the conveyor belt assembly in a linear reciprocating motion. The electromagnet is located on the side of the fixed base away from the base and is fixedly connected to the base. The feeder actuator seat is hinged to a fixed base at one end, and can be magnetically attracted to an electromagnet. The feeder push rod is fixed to the end of the feeder push rod seat away from the hinge and can be connected to the end of the swing rod that extends to the outside of the second mounting plate. The base is equipped with a drive element that drives the conveyor belt assembly to rotate in both directions.

[0011] The present invention is further configured such that: a detection plate is also provided on the base, which is vertically corresponding to the feeder push rod seat.

[0012] The present invention is further configured such that: a support bearing limiting block is fixedly provided on the vertical side of the base located on the feeder push rod seat, and a support bearing that abuts against the feeder push rod seat is rotatably provided on the support bearing limiting block.

[0013] The present invention is further configured such that: the conveyor belt assembly includes a drive shaft and a driven shaft arranged side by side, the two ends of the drive shaft and the driven shaft are respectively connected by a pulley assembly, the fixed seat is fixed to the pulley assembly, the conveyor belt assembly also includes a linear guide rail fixedly connected to the base and a slider slidably connected to the linear guide rail, the sliding direction of the slider is the same as the movement direction of the fixed seat, and the fixed seat and the slider are fixedly connected.

[0014] The present invention is further configured such that: an assembly block is fixedly disposed on the base, a second assembly block is fixedly disposed on the assembly block, and a first assembly block that can be misaligned and abutted against the second assembly block is fixedly disposed on the second mounting plate.

[0015] The beneficial effect of this invention is that it ensures the stability of feeder feeding by using a passive feeder without an independent drive structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial structural diagram of the installation space in this invention; Figure 3 This is a partial structural diagram of the feeder unit when it is installed on the drive unit in this invention; Figure 4 This is a schematic diagram of the structure of the feeder push rod seat and the electromagnet in this invention. Figure 5 This is a schematic diagram of the structure of the feeder section with the transmission wheel on one side in this invention; Figure 6 This is a schematic diagram of the connection between the synchronizing rod and the sliding connecting rod in this invention; Figure 7 This is a partial structural diagram of one side of the swing arm in this invention.

[0017] In the diagram: 10. Support base; 11. Protective housing; 12. Drive shaft; 13. Driven shaft; 14. Synchronous belt; 15. Fixed seat; 16. Linear guide rail; 17. Slider; 18. Feeder push rod seat; 19. Magnetic plate; 20. Electromagnet; 21. Tension spring; 22. Support bearing limit block; 23. Support bearing; 24. Feeder push rod; 25. Top baffle; 26. Push rod slide groove; 27. Drive motor; 28. Detection plate; 29. ​​First mounting plate; 30. Second mounting plate; 31. Conveying trough; 32. 33. Anti-detachment shell; 34. Engaging gear; 35. Synchronizing pulley; 36. Conveying gear; 37. Swinging rod; 38. Driven push plate; 39. First locking block; 40. Second locking block; 41. First connecting rod; 42. Second connecting rod; 43. Sliding connecting rod; 44. Connecting channel; 45. Synchronizing rod; 46. Driven connecting plate; 47. First mounting wheel; 48. Second mounting wheel; 59. Active mating wheel; 50. Driven mating wheel; 51. Receiving bin; 52. Assembly block; 53. First assembly locking block; 54. Second assembly locking block. Detailed Implementation

[0018] To facilitate a clear understanding of the technical means, inventive features, objectives, and effects of this invention, the following description is provided in conjunction with... Figures 1 to 7 The invention will be further illustrated as shown.

[0019] like Figures 1 to 4As shown, a passive feeder drive structure for a pick-and-place machine includes a feeder section and a drive section. The feeder section includes a second mounting plate 30 and a plurality of conveying teeth 35 arranged in an equiangular circular array for driving the material belt. The conveying teeth 35 are fixed on a synchronous wheel 34 rotatably connected to the second mounting plate 30. The conveying teeth 35 are located on the outer curved surface of the synchronous wheel 34, and the portion of the synchronous wheel 34 at the top of the second mounting plate 30 passes through the second mounting plate 30. The conveying teeth 35 extend to the outer side of the second mounting plate 30. An anti-detachment housing 32 is fixedly provided on the portion of the second mounting plate 30 through which the synchronous wheel 34 passes. The outer side of the second mounting plate 30, which connects to the anti-detachment housing 32, has a conveying groove 31 that extends tangentially along the synchronous pulley 34 and passes through the second mounting plate 30. The material belt is located in the conveying groove 31 and is supplied along the extension direction of the conveying groove 31. The space enclosed by the anti-detachment housing 32 and the conveying groove 31 can restrict the output direction of the material belt. A vertically penetrating material pick-up port for the external mechanical gripper of the chip mounter is provided on the anti-detachment housing 32. The material pick-up port is always aligned with several material slots on the material belt. The anti-detachment housing 32 does not completely enclose the conveying groove 31 along the extension direction, but only encloses it at the output end of the conveying groove 31. The side of the material belt facing the second mounting plate 30 is pre-set with transmission tooth grooves that match the tooth parameters of several conveying teeth 35 at the factory. The matching of the conveying teeth 35 and the transmission tooth grooves can ensure the stability and accuracy of each conveying of the material belt. The side of the material belt away from the second mounting plate 30 is pre-set with material slots for placing materials, as well as sealing tape pasted on the surface of the material belt to seal the material slots.

[0020] like Figures 5 to 7As shown, a meshing gear 33 that rotates synchronously with the synchronous pulley 34 is provided on the axial side of the synchronous pulley 34. A swing rod 36 that is rotatably connected to the rotating shaft of the meshing gear 33 is provided on the coaxial side of the meshing gear 33 away from the synchronous pulley 34. There is a gap between the swing rod 36 and the meshing gear 33 or the swing rod 36 cannot drive the meshing gear 33 to rotate when it rotates. One end of the swing rod 36 extends to the outside of the second mounting plate 30 and is bent to form a driven push plate 37. The middle part of the swing rod 36 is hinged to a first locking block 38 whose end engages unidirectionally with the outer teeth of the meshing gear 33. When the first locking block 38 engages with the outer teeth of the meshing gear 33, the meshing gear 33 can only rotate in one direction. The first locking block 38 is provided with a first elastic member for keeping the first locking block 38 and the meshing gear 33 in constant contact. The drive unit pushes the end of the swing rod 36 located outside the second mounting plate 30, that is, pushes the driven push plate 37 to make the swing rod 36 swing about the rotation axis of the meshing gear 33. After losing the thrust, it resets under the elastic action of the first elastic member, thereby forming a reciprocating motion and driving the meshing gear 33 to rotate in one direction. A second locking block 39 is hinged to the second mounting plate 30 and engages unidirectionally with the outer teeth of the meshing gear 33. The meshing direction of the first locking block 38 and the second locking block 39 is the same. A second elastic member is fixedly provided between the second locking block 39 and the second mounting plate 30 to keep the second locking block 39 and the meshing gear 33 in constant contact.

[0021] When the driven push plate 37 is pushed by an external force, the swing rod 36 swings along a fixed axis, thereby causing the swing rod 36 to drive the first locking block 38 to move. At this time, the first locking block 38 does not engage with the outer teeth of the meshing gear 33 and moves to an adjacent tooth. At this time, due to the friction between the first locking block 38 and the outer teeth of the meshing gear 33, the meshing gear 33 has a rotational tendency in the same direction as the swing rod 36. However, since the second locking block 39 abuts against the outer teeth of the meshing gear 33, when the meshing gear 33 rotates in the same direction as the swing rod 36, the second locking block 39 will engage with the outer teeth of the meshing gear 33 and restrict the meshing gear 33 from rotating, thus achieving the purpose of restricting the movement of the meshing gear 33. Simultaneously, after the driven push plate 37 loses its thrust, it resets and swings under the action of the first elastic element, thereby driving the first locking block 38 to move in the opposite direction. At this time, the outer teeth of the meshing gear 33 mesh with the first locking block 38, and the first locking block 38 pushes the meshing gear 33 to rotate. At this time, the second locking block 39 does not mesh with the outer teeth of the meshing gear 33 and moves to an adjacent tooth. The above process can achieve unidirectional rotation of the meshing gear 33. During the rotation of the meshing gear 33, it will drive the conveying tooth 35 to make a circular motion through the synchronous wheel 34. The part of the conveying tooth 35 that moves to the outside of the second mounting plate 30 can mesh with the preset transmission tooth groove on the material belt and push the material belt to move linearly in the conveying groove 31. The distance of each movement is the same, thus realizing the purpose of automatic material belt supply.

[0022] like Figures 5 to 6 As shown, a first mounting plate 29 is fixedly mounted on one side of the second mounting plate 30. Two sets of transmission wheels are rotatably mounted on the first mounting plate 29. One set of transmission wheels is poweredly connected to the swing rod 36 through a transmission structure. The set of transmission wheels connected to the transmission structure includes a first mounting wheel 46 rotatably connected to the first mounting plate 29 and a synchronizing rod 44 rotatably connected to the first mounting wheel 46. The outer teeth of the synchronizing rod 44 and the first mounting wheel 46 engage in a one-way engagement. The synchronizing rod 44 and the first mounting wheel 46 can achieve one-way engagement and synchronous rotation through a conventional ratchet structure. The ratchet is coaxially fixed with the first mounting wheel 46, and the pawl is hinged to the synchronizing rod 44, with a return torsion spring on the pawl hinge shaft. This is a common technical means and will not be described in detail here. One end of the synchronizing rod 44 is connected to the transmission structure, and an active engagement wheel 49 that is clearance-fitted with the other set of transmission wheels is fixedly mounted on the first mounting wheel 46. Another set of transmission wheels includes a second mounting wheel 47 located laterally to the first mounting wheel 46 and rotatably connected to the first mounting plate 29. A driven mating wheel 50, with a gap between it and the active mating wheel 49, is fixedly mounted on the second mounting wheel 47. Both the driven mating wheel 50 and the active mating wheel 49 have protruding teeth on their outer sides. The sealing strip on the material belt moves through the gap between the active mating wheel 49 and the driven mating wheel 50. The driven mating wheel 50 and the active mating wheel 49 rotate in opposite directions and exert pressure on the sealing strip through the protruding teeth, causing the sealing strip to move away from the material belt. Because the synchronizing rod 44 engages unidirectionally with the outer teeth of the first mounting wheel 46, the active mating wheel 49 can only follow the first mounting wheel 46 as it rotates from the sealing strip feeding side to the sealing strip discharging side. A receiving bin 51, fixedly connected to the first mounting plate 29, is located on the rotational tangential direction at the opposite ends of the driven mating wheel 50 and the active mating wheel 49. The receiving bin 51 has an inlet for the sealing strip to enter, facing the gap between the active mating wheel 49 and the driven mating wheel 50. Under actual working conditions, the one-way meshing direction of the outer teeth of the synchronizing rod 44 and the first mounting wheel 46, as well as the setting direction of the receiving bin 51, can be adjusted and adapted according to the feeding direction of the sealing strip to meet the requirement that the above-mentioned active mating wheel 49 can only follow the first mounting wheel 46 to rotate from the feeding side of the sealing strip to the discharging side of the sealing strip.

[0023] like Figures 5 to 7As shown, the transmission structure includes a first connecting rod 40 hinged to the first mounting plate 29, with the middle part of the first connecting rod 40 hinged to the first mounting plate 29. A second connecting rod 41, hinged to the end of the first connecting rod 40, is mounted on the swing rod 36. A sliding connecting rod 42, with one end movably hinged to the other end of the first connecting rod 40, is linearly slidably mounted on the first mounting plate 29. The connection point between the sliding connecting rod 42 and the first connecting rod 40 can slide along the extension direction of the first connecting rod 40 and rotate about a fixed axis around the connection point. A connecting channel 43 is provided at the end of the sliding connecting rod 42 away from the first connecting rod 40. The end of the synchronizing rod 44 extends into the connecting channel 43 and is bent to form a driven connecting plate 45. The driven connecting plate 45 prevents the end of the synchronizing rod 44 from coming out of the connecting channel 43, thus improving the connection stability. An auxiliary spring, fixedly connected to the first mounting plate 29, is fixedly mounted at the end of the synchronizing rod 44 opposite to the driven connecting plate 45. The auxiliary spring is used for the reset movement of the synchronizing rod 44.

[0024] When the swing rod 36 flips, the first engaging block 38 first moves to the outer tooth of the adjacent meshing gear 33. At this time, the swing rod 36 pulls the end of the first connecting rod 40 away from the sliding connecting rod 42 towards the second mounting plate 30 through the second connecting rod 41 to perform a flipping motion. At this time, the sliding connecting rod 42 moves in a straight line away from the first connecting rod 40. During the entire movement, the first engaging block 38 does not mesh with the outer tooth of the meshing gear 33, and the ratchet structure between the synchronizing rod 44 and the first mounting wheel 46 does not mesh. When the swing rod 36 resets and flips, the first engaging block 38 meshes with the outer tooth of the meshing gear 33, and the ratchet structure between the synchronizing rod 44 and the first mounting wheel 46 meshes. At this time, the end of the first connecting rod 40 away from the sliding connecting rod 42 moves in a reset motion away from the second mounting plate 30. At this time, the meshing gear 33 rotates, and the first mounting wheel 46 also rotates synchronously.

[0025] When the swing rod 36 resets and flips, the sliding link 42 moves linearly toward the first link 40. After the inner wall of the connecting channel 43 abuts against the driven connecting plate 45, the ratchet structure between the synchronizing rod 44 and the first mounting wheel 46 drives the first mounting wheel 46 to rotate unidirectionally. The auxiliary spring is stretched, that is, the active engaging wheel 49 follows the first mounting wheel 46 to rotate from the sealing tape feeding side to the sealing tape discharging side. When the sliding link 42 resets and slides in the reverse direction, the pushing force of the connecting channel 43 on the driven connecting plate 45 is released. The synchronizing rod 44 resets under the elastic action of the auxiliary spring. Since the synchronizing rod 44 and the first mounting wheel 46 do not engage in this direction, the active engaging wheel 49 does not move at this time. As the sliding link 42 follows the synchronous reciprocating motion of the first link 40, the purpose of inputting the sealing tape into the receiving hopper 51 for storage is achieved. During the feeding process, the material belt body enters the conveying trough 31 for feeding. After passing through the conveying trough 31, it moves downward under the action of gravity. Due to the storage function of the receiving bin, the sealing belt moves in the direction of the two sets of drive wheels, thereby realizing the separation process of the sealing belt and the material belt. The separation point of the sealing belt and the material belt is located in the part of the conveying trough 31 that is not covered by the anti-detachment shell 32.

[0026] like Figures 1 to 3As shown, the drive unit includes a base, a conveyor belt assembly, a fixed base 15, a feeder push rod seat 18, an electromagnet 20, and a feeder push rod 24. The base includes a support frame 10 and a protective shell 11. The support frame 10 is directly mounted on the pick-and-place machine, and the protective shell 11 is located on the outside of the support frame 10 to cover objects mounted on the support frame 10. The conveyor belt assembly is located on the support frame 10 within the base and at both ends of the support frame 10. The fixed base 15 is connected to the conveyor belt assembly and follows the conveyor belt assembly in a linear reciprocating motion. The electromagnet 20 is located on the side of the fixed base 15 away from the base and is fixedly connected to the support frame 10 within the base. One end of the feeder push rod seat 18 is hinged to the fixed base 15. A magnetic absorbing piece 19 is fixedly mounted on the feeder push rod seat 18. When the electromagnet 20 is energized, the feeder push rod seat 18 is magnetically attracted to the magnetic absorbing piece 19, achieving indirect attraction with the electromagnet 20. The feeder push rod 24 is fixed to the end of the feeder push rod seat 18 away from the hinge and can be connected to the end of the swing rod 36 that extends to the outside of the second mounting plate 30. The protective shell 11 surrounds the electromagnet 20 and the fixed seat 15. The support base 10 is provided with a drive element for driving the conveyor belt assembly. The drive element includes a drive motor 27, which drives the conveyor belt assembly to rotate in both directions. The side of the electromagnet 20 away from the support base 10 is also provided with a top baffle 25 that is fixedly connected to the support base 10 and the protective shell 11. The top baffle 25, the support base 10, and the protective shell 11 together form an installation space. The conveyor belt assembly, the fixed seat 15, the feeder push rod seat 18, the electromagnet 20, and the feeder push rod 24 are all located in the installation space. The top baffle 25 has a push rod groove 26 that is vertically aligned with the feeder push rod seat 18. A plurality of electromagnets 20 and feeder rod seats 18 corresponding to the electromagnets 20 are provided in the extending direction of the fixed base 15. A tension spring 21 is fixedly provided between the feeder rod seat 18 and the electromagnets 20. The tension spring 21 provides the feeder rod seat 18 with a pulling force toward the electromagnets 20, but the elastic force of the tension spring 21 is less than the force that causes the feeder rod seat 18 to flip downward under the action of gravity.

[0027] like Figure 2 As shown, a detection plate 28 is also provided on the support base 10, which is vertically corresponding to the feeder push rod seat 18. When the electromagnet 20 is not energized, the feeder push rod seat 18 abuts against the detection plate 28 under the action of gravity. At this time, the detection plate 28 can sense the pressure of the feeder push rod seat 18.

[0028] like Figure 2 As shown, a support base 10 is fixedly provided with a support bearing limiting block 22 on the vertical side of the feeder push rod seat 18. A support bearing 23 is rotatably provided on the support bearing limiting block 22 to abut against the feeder push rod seat 18. The abutment between the feeder push rod seat 18 and the support bearing 23 is not recessed.

[0029] like Figure 1 and Figure 3 As shown, the conveyor belt assembly includes a drive shaft 12 and a driven shaft 13 arranged side by side. The two ends of the drive shaft 12 and driven shaft 13 are connected by pulley sets. The end of the drive shaft 12 extends to the outside of the support base 10 and is powered by a drive motor 27. The drive motor 27 is fixed to the outer side of the support base 10. A fixed seat 15 is fixed to the pulley set. The pulley set is the same as a conventional pulley set, with a synchronous belt 14 between the two pulleys. The fixed seat 15 is directly fixed to the synchronous belt 14. The conveyor belt assembly also includes a linear guide rail 16 fixedly connected to the support base 10 and a slider 17 slidably connected to the linear guide rail 16. The sliding direction of the slider 17 is the same as the movement direction of the fixed seat 15, and the fixed seat 15 and the slider 17 are fixedly connected. When the feeder is assembled to the drive unit, the movement direction of the fixed seat 15 is the same as the output direction of the conveyor belt.

[0030] like Figure 3 and Figure 4 As shown, an assembly block 52 is fixedly mounted on the support base 10, and a second assembly block 54 is fixedly mounted on the assembly block 52. The number of second assembly blocks 54 is the same as that of electromagnets 20, and the two are vertically aligned. A first assembly block 53 is fixedly mounted on the second mounting plate 30, which can abut against the second assembly block 54 in a staggered manner. When the feeder is assembled to the drive unit, the feeder is first moved forward, causing the first assembly block 53 to move below the second assembly block 54. Then, the first assembly block 53 is moved toward the second assembly block 54, and the second assembly block 54 abuts against and restricts the upward movement of the first assembly block 53.

[0031] When the feeder is clamped onto the drive unit, the driven push plate 37 in the feeder is vertically aligned with the push rod slide 26. At this time, the electromagnet 20 is not energized. The part of the feeder push rod seat 18 where the feeder push rod 24 is installed retracts into the installation space. After the drive motor 27 starts, the electromagnet 20 at the position where the feeder is installed is energized, while the electromagnet 20 where the feeder is not installed is not energized. The drive motor 27 drives the drive shaft 12 to rotate, which in turn drives the driven shaft 13 to rotate via the pulley set. At this time, the fixed seat 15, mounted on the synchronous belt 14, moves linearly between the drive shaft 12 and the driven shaft 13, following the synchronous belt 14. Due to the cooperation of the linear guide 16 and the slider 17, the fixed seat 15 can maintain linear motion. When the fixed seat 15 moves from the drive shaft 12 towards the driven shaft 13, the fixed seat 15 drives the feeder push rod seat 18 to move synchronously via the electromagnet 20. Simultaneously, the support bearing 23 gradually moves to the end of the feeder push rod seat 18 where the feeder push rod 24 is located. At this time, the feeder push rod seat 18 flips along the hinge end with the electromagnet 20 towards the feeder section. The limit position of the flip is when the feeder push rod seat 18 flips to the state where the magnetic plate 19 is in contact with the electromagnet 20. The magnetic accumulator 19 and the electromagnet 20 are magnetically attracted to each other. The feeder push rod 24 extends from the push rod groove 26 to the outside. Then, as the drive motor 27 moves in the opposite direction, the fixed seat 15 moves in the opposite direction toward the drive shaft 12. Due to the continuous attraction between the magnetic accumulator 19 and the electromagnet 20, when the support bearing 23 moves to the concave part of the feeder push rod seat 18, the feeder push rod seat 18 will not flip under the action of gravity. The feeder push rod 24 can maintain the state of extending to the outside of the push rod groove 26 for a long time. Then, the electromagnet 20 and the feeder push rod seat 18 drive the feeder push rod 24 to move, so that the feeder push rod 24 contacts the driven push plate 37 and pushes the driven push plate 37 to move away from the first mounting plate 29. At this time, the swing rod 36 begins to rotate on a fixed axis, so as to drive the feeder part. When multiple feeders are installed side by side on the drive unit, by controlling the on and off of the corresponding electromagnets 20 of the multiple feeders, individual drive of the feeder at a specified position can be achieved, making the placement machine more flexible.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A passive feeder drive structure for a pick-and-place machine, comprising a feeder section and a drive section, characterized in that: The feeder includes a second mounting plate (30) and a plurality of conveying teeth (35) arranged in an equiangular circumferential array for driving the material belt. The conveying teeth (35) are fixed on a synchronous wheel (34) that is rotatably connected to the second mounting plate (30). A meshing gear (33) that rotates synchronously is provided on the axial side of the synchronous wheel (34). A swing rod (36) with its end extending to the outside of the second mounting plate (30) is provided on the coaxial side of the meshing gear (33). A first locking block (38) with its end unidirectionally meshing with the outer teeth of the meshing gear (33) is hinged to the middle of the swing rod (36). A first elastic member is provided on the first locking block (38) for keeping the first locking block (38) and the meshing gear (33) in constant contact. The drive unit pushes the swing rod (36) to one end located outside the second mounting plate (30) so that the swing rod (36) rotates back and forth on a fixed axis and drives the meshing gear (33) to rotate unidirectionally.

2. The passive feeder drive structure for a pick-and-place machine according to claim 1, characterized in that: A second locking block (39) is hinged to the second mounting plate (30) and engages unidirectionally with the outer teeth of the meshing gear (33). The meshing direction of the first locking block (38) and the second locking block (39) is the same. A second elastic member is fixedly provided between the second locking block (39) and the second mounting plate (30) to keep the second locking block (39) and the meshing gear (33) in constant contact.

3. The passive feeder drive structure for a pick-and-place machine according to claim 1, characterized in that: A first mounting plate (29) is fixedly installed on one side of the second mounting plate (30). Two sets of transmission wheels are rotatably installed on the first mounting plate (29). One set of transmission wheels is connected to the swing rod (36) through a transmission structure.

4. The passive feeder drive structure for a pick-and-place machine according to claim 3, characterized in that: A set of transmission wheels connected to the transmission structure includes a first mounting wheel (46) rotatably connected to the first mounting plate (29) and a synchronizing rod (44) rotatably connected to the first mounting wheel (46). The outer teeth of the synchronizing rod (44) mesh unidirectionally with the outer teeth of the first mounting wheel (46). One end of the synchronizing rod (44) is connected to the transmission structure. An active engagement wheel (49) that is clearance-fitted with another set of transmission wheels is fixedly provided on the first mounting wheel (46).

5. The passive feeder drive structure for a pick-and-place machine according to claim 4, characterized in that: The transmission structure includes a first connecting rod (40) hinged to the first mounting plate (29), a second connecting rod (41) hinged to the swing rod (36) and hinged to the first connecting rod (40), a sliding connecting rod (42) with one end connected to the first connecting rod (40) is linearly slidably arranged on the first mounting plate (29), a connecting channel (43) is opened at the end of the sliding connecting rod (42) away from the first connecting rod (40), and the end of the synchronizing rod (44) extends into the connecting channel (43).

6. The passive feeder drive structure for a pick-and-place machine according to claim 1, characterized in that: The drive unit includes: Base The conveyor belt assembly is mounted on the base. The fixed seat (15) is connected to the conveyor belt assembly and follows the conveyor belt assembly in a linear reciprocating motion. An electromagnet (20) is located on the side of the fixed base (15) away from the base and is fixedly connected to the base. The feeder push rod seat (18) is hinged at one end to the fixed seat (15), and the feeder push rod seat (18) can be magnetically attracted to the electromagnet (20). Feeder push rod (24) is fixed to the end of feeder push rod seat (18) away from the hinge and can be connected to the end of swing rod (36) extending to the outside of the second mounting plate (30). The base is equipped with a drive element that drives the conveyor belt assembly to rotate in both directions.

7. The passive feeder drive structure for a pick-and-place machine according to claim 6, characterized in that: The base is also equipped with a detection plate (28) that is vertically corresponding to the feeder push rod seat (18).

8. The passive feeder drive structure for a pick-and-place machine according to claim 6, characterized in that: A support bearing limiting block (22) is fixedly installed on the vertical side of the feeder push rod seat (18) on the base, and a support bearing (23) that abuts against the feeder push rod seat (18) is rotatably installed on the support bearing limiting block (22).

9. The passive feeder drive structure for a pick-and-place machine according to claim 6, characterized in that: The conveyor belt assembly includes a drive shaft (12) and a driven shaft (13) arranged side by side. The two ends of the drive shaft (12) and the driven shaft (13) are connected by a pulley assembly. The fixed seat (15) is fixed to the pulley assembly. The conveyor belt assembly also includes a linear guide rail (16) fixedly connected to the base and a slider (17) slidably connected to the linear guide rail (16). The sliding direction of the slider (17) is the same as the movement direction of the fixed seat (15), and the fixed seat (15) and the slider (17) are fixedly connected.

10. A passive feeder drive structure for a pick-and-place machine according to claim 6, characterized in that: An assembly block (52) is fixedly installed on the base, and a second assembly block (54) is fixedly installed on the assembly block (52). A first assembly block (53) that can be misaligned and abutted against the second assembly block (54) is fixedly installed on the second mounting plate (30).

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