Smt paster z-axis down-pressing guide mechanism

Abstract

This invention discloses a Z-axis downward pressing guide mechanism for an SMT placement machine, including a mounting base. Placement heads are located on both sides of the front of the mounting base, a drive mechanism is located on the top of the mounting base, a sliding mechanism is provided between the placement heads and the mounting base, and a return mechanism is provided between the two placement heads. This invention uses an extrusion block to press one of the placement heads downwards. The placement head drives a movable rod downwards, and a limiting block and a stop block move with the movable rod. The stop block deforms under the pressure of a compression spring, and the elasticity of the compression spring pushes the stop block and the movable rod upwards. As one end of the extrusion block rotates upwards, its upper surface presses against the limiting block, causing the movable rod to drive the placement head upwards. This ensures stable vertical movement of the placement head, reduces the space occupied by the placement head, and facilitates the placement of SMT electronic components.

Description

Technical Field

[0001] This invention relates to the field of SMT placement machines, and particularly to a Z-axis pressing and guiding mechanism for an SMT placement machine. Background Technology

[0002] SMT, or Surface Mount Technology, is currently the most popular technology and process in the electronics assembly industry. The pick-and-place machine is the main equipment in the SMT production line, and the placement head is the core component of the pick-and-place machine. The nozzle rod assembly and the drive nozzle rod assembly move vertically in the Z-axis direction, while the drive nozzle rod assembly moves downward in the Z-axis direction.

[0003] The Z-axis pressing mechanism of a placement head typically consists of a pressing motor, pulleys, a drive belt, and a pressing plate. The pressing motor and drive belt drive multiple pulleys to move together, causing the pressing plate to press the placement head downwards. This results in the placement head pressing vertically downwards along the Z-axis. Guide rods are connected to both sides of the pressing plate via linear bearings. The pressing plate, linear bearings, and guide rods constitute the guiding structure of the Z-axis pressing mechanism. However, the Z-axis pressing and guiding mechanisms of common placement heads are large, occupying a significant amount of installation space. This makes installation and operation of the placement head difficult, hinders stable placement operations, and reduces production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a Z-axis pressing and guiding mechanism for an SMT pick and place machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a Z-axis downward pressure guide mechanism for an SMT placement machine, comprising a mounting base, on both sides of the front of the mounting base being provided with placement heads, a chassis being fixedly connected to the top of the back of the mounting base, a drive motor being fixedly installed on the inner wall of the chassis, a drive mechanism being provided on the top of the mounting base for driving the two placement heads to move alternately in the Z-axis direction, a sliding mechanism being provided between the placement heads and the mounting base for ensuring stable vertical movement of the placement heads, and a lifting mechanism being provided between the two placement heads for driving the placement heads to move vertically upward.

[0006] Preferably, the drive mechanism includes an extrusion block, which is disposed above the two placement heads. A rotating shaft is fixedly connected to the middle of the extrusion block. One end of the rotating shaft is rotatably connected to the top of the mounting base. A fixing block is fixedly connected to one end of the rotating shaft. The front of the fixing block is in contact with the front of the inner wall of the chassis.

[0007] Preferably, the output end of the drive motor is connected to a connecting block, and a connecting rod is provided between the connecting block and the fixed block. Both ends of the connecting rod are rotatably connected to connecting shafts. One end of one connecting shaft is fixedly connected to the top of the back side of the fixed block, and one end of the other connecting shaft is fixedly connected to the top of the front side of the connecting block.

[0008] Preferably, the sliding mechanism includes multiple mounting blocks, the back of the mounting block is fixedly connected to one side of the front of the mounting base, mounting grooves are provided on both sides of the mounting block, a sliding block is fixedly connected to the back of the mounting head, and the inner cavity of the sliding block is slidably inserted into the mounting block.

[0009] Preferably, movable grooves are provided on both sides of the inner wall of the sliding block, and a movable block is slidably inserted into the inner cavity of the movable groove. One side of the movable block is slidably inserted into the inner cavity of the mounting groove, and a compression spring is fixedly connected to one side of the inner wall of the movable groove. One end of the compression spring is in contact with the other side of the movable block.

[0010] Preferably, the top and bottom of the inner wall of the movable groove are provided with slots, and a locking block is fixedly connected to one side of the upper and lower surfaces of the movable block. The locking block is slidably inserted into the inner cavity of the slot.

[0011] Preferably, the lifting mechanism includes two movable rods, with a mounting shaft fixedly inserted at the bottom of each movable rod. A fixed seat is rotatably inserted at one end of the mounting shaft. One side of the fixed seat is fixedly connected to one side of the outer wall of the mounting head. A connecting groove is provided in the middle of both ends of the extrusion block. The inner cavity of the connecting groove is slidably inserted into the top of the movable rod. A limit block is fixedly inserted into the top of the movable rod.

[0012] Preferably, a protrusion is fixedly connected to the top of the front side of the mounting base, the top of the movable rod is slidably inserted into the protrusion, grooves are provided on both sides of the upper surface of the protrusion, a second compression spring is provided in the inner cavity of the groove, the second compression spring is movably sleeved with the top of the movable rod, a stop block is fixedly connected to the top of the movable rod, and the lower surface of the stop block is in contact with the top of the second compression spring.

[0013] Preferably, mounting holes are provided at the corners of the mounting base, a patch suction head is provided at the bottom of the mounting head, the extrusion block and the fixing block are both elongated, and a fixing ring is fixedly connected to the other end of the rotating shaft.

[0014] Preferably, the limiting block is spherical and positioned above the connecting groove. The diameter of the limiting block is greater than the width of the connecting groove. The protrusion is elongated. The inner cavity of the groove is slidably inserted into the top of the movable rod.

[0015] The technical effects and advantages of this invention are as follows:

[0016] (1) The present invention utilizes a combination of an extrusion block, a placement head, a movable rod, a stop block, a second compression spring, and a limiting block. By rotating the extrusion block, one end of it presses downward against one of the placement heads. The placement head drives the movable rod to move downward together. The limiting block and the stop block move together with the movable rod. The stop block deforms against the second compression spring and, using the elasticity of the second compression spring, pushes the stop block and the movable rod upward. As one end of the extrusion block rotates upward, the upper surface of the extrusion block presses upward against the limiting block, causing the movable rod to drive the placement head to move upward. This ensures that the placement head moves stably in the vertical direction, reduces the space occupied by the placement head, and facilitates the placement of surface mount electronic components.

[0017] (2) The present invention utilizes a combination of a sliding block, a mounting block, a movable block, a compression spring, and a sliding groove. By moving the placement head, the sliding block and the mounting block are slidably connected. The inclined surface of the movable block in the inner cavity of the sliding block is pressed against the bottom end of the mounting block, causing the movable block to slide into the inner cavity of the movable groove. The movable block compresses and deforms the compression spring, and the elasticity of the compression spring pushes one end of the movable block to slide into the inner cavity of the mounting groove, thus connecting the sliding block and the mounting block. As the placement head and the sliding block move, one side of the movable block slides in the inner cavity of the mounting groove, ensuring that the sliding block and the placement head move vertically along the mounting block, which facilitates guiding the movement of the placement head.

[0018] (3) The present invention utilizes a combination of connecting block, fixing block, connecting rod, rotating shaft and extrusion block. By driving the motor, the connecting block is rotated, the connecting block drives one end of the connecting rod to rotate together, and the other end of the connecting rod drives the fixing block to rotate repeatedly, so that the rotating shaft and extrusion block rotate repeatedly. The two ends of the extrusion block alternately press down on the two placement heads, which facilitates the stable operation of the placement heads. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the front structure of the mounting head of the present invention.

[0021] Figure 3 This is a side cross-sectional view of the mounting base of the present invention.

[0022] Figure 4 This is a schematic diagram of the front structure of the connecting block of the present invention.

[0023] Figure 5 This is a front cross-sectional view of the extrusion block of the present invention.

[0024] Figure 6 This is a schematic cross-sectional view of the mounting block of the present invention from the back.

[0025] Figure 7 For the present invention Figure 3 A magnified structural diagram at point A.

[0026] Figure 8 For the present invention Figure 6 A magnified structural diagram at point B.

[0027] Figure 9 For the present invention Figure 5 A magnified structural diagram at point C.

[0028] In the diagram: 1. Mounting base; 2. Placement head; 3. Drive motor; 4. Drive mechanism; 41. Extrusion block; 42. Rotating shaft; 43. Fixing block; 44. Connecting block; 45. Connecting rod; 46. Connecting shaft; 5. Sliding mechanism; 51. Mounting block; 52. Mounting groove; 53. Sliding block; 54. Movable groove; 55. Movable block; 56. Compression spring one; 57. Slot; 58. Slot; 6. Rebound mechanism; 61. Movable rod; 62. Mounting shaft; 63. Fixing base; 64. Connecting groove; 65. Limiting block; 66. Protrusion; 67. Groove; 68. Compression spring two; 69. Stop block; 7. Mounting hole; 8. Placement nozzle. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This invention provides, for example Figure 1-9The SMT pick-and-place machine's Z-axis downward guide mechanism includes a mounting base 1. The mounting base 1 secures the placement head 2 to the SMT pick-and-place machine. Placement heads 2 are located on both sides of the front of the mounting base 1. Each placement head 2 is electrically connected to an external power supply via an external first switch. The placement head 2 is used to mount surface-mount electronic components, moving them along the Z-axis. A chassis is fixedly connected to the top of the back of the mounting base 1. A drive motor 3 is fixedly mounted on the inner wall of the chassis. The drive motor 3 is electrically connected to an external power supply via an external second switch, moving the placement head 2 along the Z-axis and mounting the surface-mount electronic components. The sub-components are mounted on the circuit board. The top of the mounting base 1 is equipped with a drive mechanism 4, which drives the two mounting heads 2 to move alternately in the Z-axis direction. The mounting head 2 is moved by the drive mechanism 4. A sliding mechanism 5 is provided between the mounting head 2 and the mounting base 1 to ensure that the mounting head 2 moves stably in the vertical direction. The sliding mechanism 5 guides the movement of the mounting head 2 to ensure that the mounting head 2 moves in the vertical direction. A lifting mechanism 6 is provided between the two mounting heads 2 to drive the mounting head 2 to move vertically upward. The lifting mechanism 6 drives the two mounting heads 2 to move alternately upward in the vertical direction.

[0031] The drive mechanism 4 includes an extrusion block 41, which is positioned above the two placement heads 2. The two ends of the extrusion block 41 extrude pressure to the bottom of the back of the two placement heads 2, causing the placement heads 2 to move downward in the vertical direction. A rotating shaft 42 is fixedly inserted through the middle of the extrusion block 41. The rotating shaft 42 is used to mount the extrusion block 41. The extrusion block 41 rotates around the rotating shaft 42. One end of the rotating shaft 42 is rotatably inserted through the top of the mounting base 1. The rotating shaft 42 drives the extrusion block 41 to rotate on the top of the mounting base 1. A fixing block 43 is fixedly connected to one end of the rotating shaft 42. The fixing block 43 is located in the inner cavity of the chassis and is used to limit the installation of the rotating shaft 42 and drive the rotating shaft 42 and the extrusion block 41 to rotate stably. The front of the fixing block 43 is in contact with the front of the inner wall of the chassis.

[0032] A connecting block 44 is connected to the output end of the drive motor 3. The connecting block 44 rotates together with the output end of the drive motor 3. A connecting rod 45 is provided between the connecting block 44 and the fixed block 43, connecting the connecting block 44 and the fixed block 43 through the connecting rod 45. One end of the connecting rod 45 rotates with the connecting block 44, and the other end of the connecting rod 45 drives the fixed block 43, the rotating shaft 42, and the pressing block 41 to rotate. Both ends of the connecting rod 45 are rotatably connected to the connecting shaft 46, and the two ends of the connecting rod 45 are connected to the connecting block 44 and the fixed block 43 through the connecting shaft 46. 3. Rotary connection: The two ends of the connecting rod 45 rotate around the rotating shaft 42. One end of one connecting shaft 46 is fixedly connected to the top of the back of the fixing block 43, and the other end of the connecting shaft 46 is fixedly connected to the top of the front of the connecting block 44. By running the drive motor 3, the connecting block 44 is driven to rotate. The connecting block 44 drives one end of the connecting rod 45 to rotate together. The other end of the connecting rod 45 drives the fixing block 43 to rotate repeatedly, so that the rotating shaft 42 and the extrusion block 41 rotate repeatedly. The two ends of the extrusion block 41 alternately extrude downwards on the two mounting heads 2.

[0033] The sliding mechanism 5 includes multiple mounting blocks 51. The back of the mounting block 51 is fixedly connected to one side of the front of the mounting base 1. Both ends of the mounting block 51 are fixed to one side of the front of the mounting base 1 by bolts. The mounting block 51 is vertically arranged and is used to install the sliding block 53. Mounting grooves 52 are provided on both sides of the mounting block 51. The mounting grooves 52 are used to install the movable block 55. The back of the placement head 2 is fixedly connected to the sliding block 53. The sliding block 53 is C-shaped. The inner cavity of the sliding block 53 is slidably inserted and connected to the mounting block 51. The placement head 2 is slidably connected to the mounting block 51 through the sliding block 53, so that the placement head 2 moves vertically along the mounting block 51, and the movement of the placement head 2 is guided.

[0034] Movable grooves 54 are provided on both sides of the inner wall of the sliding block 53. The movable grooves 54 are used to install the movable block 55. The movable block 55 is slidably connected in the inner cavity of the movable groove 54. The movable block 55 slides in the inner cavity of the movable groove 54. The top and bottom of one side of the movable block 55 are set with slopes to facilitate the pressing of the movable block 55 with the mounting block 51. One side of the movable block 55 is slidably connected in the inner cavity of the mounting groove 52. As the placement head 2 and the sliding block 53 move, one side of the movable block 55 is driven to slide in the inner cavity of the mounting groove 52, connecting the sliding block 53 with the mounting block 51, ensuring that the sliding block 53 and the placement head 2 move vertically along the mounting block 51. A compression spring 56 is fixedly connected to one side of the inner wall of the movable groove 54. One end of the compression spring 56 is in contact with the other side of the movable block 55.

[0035] The top and bottom of the inner wall of the movable groove 54 are provided with slots 57 for mounting the slots 57. The upper and lower surfaces of the movable block 55 are fixedly connected with the slots 58. The slots 58 move together with the movable block 55. The movement of the movable block 55 drives the slots 58 to slide in the inner cavity of the slots 57, limiting the movement of the movable block 55. The slots 58 and the inner cavity of the slots 57 are slidably interlocked.

[0036] The lifting mechanism 6 includes two movable rods 61. The movable rods 61 move vertically with the placement head 2. The bottom of the movable rods 61 is fixedly connected to the mounting shaft 62. One end of the mounting shaft 62 is rotatably connected to the fixed seat 63. One side of the fixed seat 63 is fixedly connected to one side of the outer wall of the placement head 2. The bottom of the movable rods 61 is connected to one side of the placement head 2 through the mounting shaft 62 and the fixed seat 63, so that the movable rods 61 move vertically together with the placement head 2. The middle of both ends of the extrusion block 41 is provided with a connecting groove 64. The connecting groove 64 is used to install the movable rods 61. The movable rods 61 slide in the inner cavity of the connecting groove 64. The inner cavity of the connecting groove 64 is slidably connected to the top of the movable rods 61. The top of the movable rods 61 is fixedly connected to the limiting block 65. The limiting block 65 moves together with the movable rods 61.

[0037] A protrusion 66 is fixedly connected to the top of the front of the mounting base 1. The protrusion 66 is used to install the movable rod 61. The top of the movable rod 61 is slidably inserted into the protrusion 66, and the top of the movable rod 61 slides vertically on the protrusion 66. Grooves 67 are provided on both sides of the upper surface of the protrusion 66. The grooves 67 are used to accommodate the second compression spring 68. The second compression spring 68 is provided in the inner cavity of the groove 67 and is used to support the movable rod 61. The second compression spring 68 is movably sleeved with the top of the movable rod 61. A stop block 69 is fixedly connected to the top of the movable rod 61. The stop block 69 moves with the movable rod 61 and is used to support the second compression spring. 68 is compressed and deformed. The lower surface of the stop block 69 is in contact with the top of the second compression spring 68. By rotating the extrusion block 41, one end of it is pressed downward against one of the placement heads 2. The placement head 2 drives the movable rod 61 to move downward together. The limit block 65 and the stop block 69 move together with the movable rod 61. The stop block 69 is compressed and deformed against the second compression spring 68. The elasticity of the second compression spring 68 is used to push the stop block 69 and the movable rod 61 upward. As one end of the extrusion block 41 rotates upward, the upper surface of the extrusion block 41 is pressed upward against the limit block 65, so that the movable rod 61 drives the placement head 2 to move upward.

[0038] Mounting holes 7 are provided at the corners of the mounting base 1. The mounting holes 7 are used to install bolts to facilitate the fixed installation of the mounting base 1. The bottom of the placement head 2 is provided with a placement suction head 8, which is used to pick up and move the surface mount electronic components. The extrusion block 41 and the fixing block 43 are both elongated. The other end of the rotating shaft 42 is fixedly connected with a fixing ring. The limiting block 65 is spherical and is located above the connecting groove 64. The diameter of the limiting block 65 is larger than the width of the connecting groove 64. The protrusion 66 is elongated. The inner cavity of the groove 67 is slidably connected to the top of the movable rod 61.

[0039] Working principle of this invention: The operation of the drive motor 3 drives the connecting block 44 to rotate, which in turn drives one end of the connecting rod 45 to rotate. The other end of the connecting rod 45 drives the fixed block 43 to rotate repeatedly, causing the rotating shaft 42 and the extrusion block 41 to rotate repeatedly. The two ends of the extrusion block 41 alternately press down on the two placement heads 2. One end of the extrusion block 41 presses down on one of the placement heads 2, causing the placement head 2 to drive the movable rod 61 to move downward together. The limiting block 65 and the stop block 69 move together with the movable rod 61. The stop block 69 compresses and deforms the compression spring 68, and the elasticity of the compression spring 68 pushes the stop block 69 and the movable rod 61 upward. As one end of the extrusion block 41 rotates upward, the upper surface of the extrusion block 41 presses upward against the limiting block 65. The pressure causes the movable rod 61 to move the placement head 2 upward. At the same time, by moving the placement head 2, the sliding block 53 and the mounting block 51 are slidably connected. The inclined surface of the movable block 55 in the inner cavity of the sliding block 53 is pressed against the bottom end of the mounting block 51, causing the movable block 55 to slide into the inner cavity of the movable groove 54. The movable block 55 compresses and deforms the compression spring 56, and the elasticity of the compression spring 56 pushes one end of the movable block 55 to slide into the inner cavity of the mounting groove 52, thus slidingly connecting the sliding block 53 and the mounting block 51. As the placement head 2 and the sliding block 53 move, one side of the movable block 55 slides in the inner cavity of the mounting groove 52, ensuring that the sliding block 53 and the placement head 2 move vertically along the mounting block 51, thus guiding the movement of the placement head 2.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An SMT pick-and-place machine Z-axis down-press guiding mechanism, characterized in that, The device includes a mounting base (1), on both sides of the front of the mounting base (1) are mounting heads (2), and a chassis is fixedly connected to the top of the back of the mounting base (1). A drive motor (3) is fixedly installed on the inner wall of the chassis. A drive mechanism (4) is provided on the top of the mounting base (1), which is used to drive the two mounting heads (2) to move alternately in the Z-axis direction. A sliding mechanism (5) is provided between the mounting heads (2) and the mounting base (1), which is used to ensure that the mounting heads (2) move stably in the vertical direction. A lifting mechanism (6) is provided between the two mounting heads (2), which is used to drive the mounting heads (2) to move vertically upward. The drive mechanism (4) includes an extrusion block (41), which is located above two mounting heads (2). A rotating shaft (42) is fixedly inserted through the middle of the extrusion block (41). One end of the rotating shaft (42) is rotatably inserted through the top of the mounting base (1). A fixing block (43) is fixedly connected to one end of the rotating shaft (42). The front of the fixing block (43) is in contact with the front of the inner wall of the chassis. A connecting block (44) is driven through the output end of the drive motor (3). A connecting rod (45) is provided between the connecting block (44) and the fixing block (43). Both ends of the connecting rod (45) are rotatably inserted through the connecting shaft (46). One end of one of the connecting shafts (46) is fixedly connected to the top of the back of the fixing block (43), and one end of the other connecting shaft (46) is fixedly connected to the top of the front of the connecting block (44). The lifting mechanism (6) includes two movable rods (61). A mounting shaft (62) is fixedly inserted into the bottom of each movable rod (61). A fixed seat (63) is rotatably inserted into one end of each mounting shaft (62). One side of the fixed seat (63) is fixedly connected to one side of the outer wall of the mounting head (2). A connecting groove (64) is provided in the middle of both ends of the extrusion block (41). The inner cavity of the connecting groove (64) is slidably inserted into the top of the movable rod (61). The top of the movable rod (61) is fixedly inserted into a limited... The mounting base (1) has a fixed top of a protrusion (66) on the front side of the mounting block (65). The top of the movable rod (61) is slidably connected to the protrusion (66). The upper surface of the protrusion (66) has grooves (67) on both sides. A compression spring (68) is provided in the inner cavity of the groove (67). The compression spring (68) is movably sleeved with the top of the movable rod (61). The top of the movable rod (61) is fixedly connected to a stop block (69). The lower surface of the stop block (69) is in contact with the top of the compression spring (68).

2. The SMT pick-and-place machine Z-axis downward pressing guide mechanism according to claim 1, characterized in that, The sliding mechanism (5) includes multiple mounting blocks (51). The back of the mounting block (51) is fixedly connected to one side of the front of the mounting base (1). Mounting grooves (52) are provided on both sides of the mounting block (51). A sliding block (53) is fixedly connected to the back of the mounting head (2). The inner cavity of the sliding block (53) is slidably inserted into the mounting block (51).

3. The Z-axis down-pressing guiding mechanism of an SMT pick-and-place machine according to claim 2, wherein, The sliding block (53) has movable grooves (54) on both sides of its inner wall. A movable block (55) is slidably inserted into the inner cavity of the movable groove (54). One side of the movable block (55) is slidably inserted into the inner cavity of the mounting groove (52). A compression spring (56) is fixedly connected to one side of the inner wall of the movable groove (54). One end of the compression spring (56) is in contact with the other side of the movable block (55).

4. The Z-axis down-pressing guiding mechanism of an SMT chip mounter according to claim 3, characterized in that, The top and bottom of the inner wall of the movable groove (54) are provided with slots (57), and one side of the upper and lower surfaces of the movable block (55) is fixedly connected with a block (58). The block (58) is slidably inserted into the inner cavity of the slot (57).

5. The Z-axis down-pressing guiding mechanism of an SMT chip mounter according to claim 1, characterized in that, Mounting holes (7) are provided at the corners of the mounting base (1), a patch suction head (8) is provided at the bottom of the mounting head (2), the extrusion block (41) and the fixing block (43) are both elongated, and a fixing ring is fixedly inserted and connected to the other end of the rotating shaft (42).

6. The Z-axis down-pressing guiding mechanism of an SMT chip mounter according to claim 1, characterized in that, The limiting block (65) is spherical and is located above the connecting groove (64). The diameter of the limiting block (65) is greater than the width of the connecting groove (64). The protrusion (66) is elongated. The inner cavity of the groove (67) is slidably inserted into the top of the movable rod (61).

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