A pen barrel cylinder integrating a guide bearing and a pickup device

Abstract

The utility model relates to a pen barrel cylinder integrating guide bearing and pickup device, including guide component, cylinder, piston rod subassembly, gas path subassembly and pickup subassembly, be provided with vacuum chamber and positive pressure chamber in the cylinder, the outside top of cylinder is equipped with gas pipe joint, cylinder vacuum air channel and cylinder positive pressure air channel are opened in the cylinder, the guide component includes guide bearing and limit screw, the guide bearing is used for the sleeve X, Y direction's guide axle, sets up in the cylinder, the piston rod subassembly includes piston rod, piston rod core and sealing element, the piston rod core is hollow structure and forms piston rod vacuum air channel, the sealing element is used for the vacuum chamber, positive pressure chamber and outside atmosphere of isolation, the gas path subassembly passes through the gas pipe joint, cylinder vacuum air channel, cylinder positive pressure air channel and piston rod vacuum air channel and leads through gas, the pickup subassembly is installed in the piston rod end, is used for picking up chip.

Description

Technical Field

[0001] This utility model relates to the technical field of integrated circuit chip testing and sorting equipment, and in particular to a pen cylinder that integrates a guide bearing and a pickup device. Background Technology

[0002] In the semiconductor packaging and testing industry, the UPH (output per unit time) of test sorting machines is a core indicator for measuring equipment efficiency, and the design of the pick-up head mechanism directly affects the UPH. Theoretically, the more pick-up heads there are, the more chips can be picked up in a single run, the higher the UPH, and the better it can meet the needs of efficient and low-cost packaging and testing.

[0003] In existing technologies, conventional pick-up heads employ a split design of "cylinder + independent guiding mechanism," such as the solution disclosed in patent 202310139479.6, where the cylinder is fixed separately to an external guiding mechanism, and the guiding mechanism is driven by a pitch-changing mechanism to achieve pitch-changing pick-up of the pick-up head. However, this design has a key drawback: the cylinder and the guiding mechanism each require independent installation space, resulting in an excessively large volume of the pick-up head mechanism in the XY direction (horizontal direction). The solution disclosed in patent 202310139478.1 also suffers from the same problem. This makes it impossible to arrange multiple pick-up heads in close proximity, making it difficult to adapt to the pick-up requirements of small-pitch (e.g., 8-11mm) chips. It is necessary to complete the operation through "multiple pitch changes + multiple pick-ups," which not only prolongs the single pick-up time but also increases the complexity of equipment operation, severely restricting packaging efficiency and failing to meet the high-efficiency and miniaturization requirements of high-density chip packaging and testing. Therefore, developing a pick-up cylinder with high integration and small volume in the XY direction has become the core direction for solving the above problems. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems and provide a pen cylinder that integrates a guide bearing and a pickup device.

[0005] A pen cylinder integrating a guide bearing and a pickup device includes a guide assembly, a cylinder, a piston rod assembly, a gas path assembly, and a pickup assembly. The cylinder contains a vacuum chamber and a positive pressure chamber, and a gas pipe connector is located on the top of the cylinder. A cylinder vacuum passage and a cylinder positive pressure passage are formed within the cylinder. The guide assembly includes a guide bearing and a limiting screw; the guide bearing is used to mount guide shafts in the X and Y directions and is disposed within the cylinder. The piston rod assembly includes a piston rod, a piston rod core, and a seal; the piston rod core has a hollow structure forming a piston rod vacuum passage, and the seal isolates the vacuum chamber, the positive pressure chamber, and the external atmosphere. The gas path assembly conducts gas through the gas pipe connector, the cylinder vacuum passage, the cylinder positive pressure passage, and the piston rod vacuum passage. The pickup assembly is mounted on the end of the piston rod and is used to pick up a chip.

[0006] The beneficial effects that this utility model can achieve include: High integration and compact size: The guide bearing, telescopic piston rod, vacuum / positive pressure chamber and air passage are integrated into a single cylinder, eliminating the installation space of an independent guide mechanism. The volume in the XY direction is smaller than that of existing technologies, and multiple cylinders can be connected in close series.

[0007] Strong adaptability to small pitch: Multiple cylinders can move to a close-fitting state, with no additional parts occupying the pitch range. The minimum adaptability pitch is 8mm, which meets the one-time pickup requirements of small pitch chips and eliminates the need for multiple pitch changes.

[0008] High operating efficiency: The air circuit and telescopic mechanism respond quickly in coordination, and with the synchronous pickup of multiple cylinders, the single pickup time is shortened, which effectively improves the UPH of the test sorter and reduces the unit packaging and testing cost.

[0009] Preferably, the sealing element includes a cylinder O-ring, a vacuum chamber spacer, a piston rod O-ring, and a piston Y-ring; the cylinder O-ring, vacuum chamber spacer, and piston rod O-ring cooperate to isolate the vacuum chamber from the positive pressure chamber, and the piston Y-ring isolates the positive pressure chamber from the outside atmosphere.

[0010] Preferably, the piston rod assembly further includes a spring, which is sleeved on the outside of the piston rod to push the piston rod back and resist the weight of the chip.

[0011] Preferably, it also includes an end cap, which is fixed to the end of the cylinder and is used to limit the extension stroke of the piston rod and provide guidance.

[0012] Preferably, the pickup component is a suction nozzle, which is installed at the end of the piston rod and connected to the vacuum chamber through the vacuum passage of the piston rod, for adsorbing chips.

[0013] Preferably, it further includes a guide shaft, which is sleeved and connected to the guide bearing. The guide shaft is arranged along the X and Y directions, and the end of the guide shaft is used to connect a pitch-changing mechanism to drive the cylinder to move along the guide shaft with pitch to adapt to different chip spacings.

[0014] Preferably, it further includes a variable pitch screw and a variable pitch motor. The end cover fixes both ends of the guide shaft in the same direction and is embedded in the helical cam groove of the variable pitch screw. The variable pitch screw rotates under the drive of the variable pitch motor, and the helical cam groove drives the end cover to move when it rotates. Attached Figure Description

[0015] Figure 1 This is an isometric drawing of the pen cylinder of this utility model.

[0016] Figure 2This is a cross-sectional view of the piston rod of this utility model.

[0017] Figure 3 This is a cross-sectional view of the vacuum and positive pressure chamber of this utility model.

[0018] Figure 4 This is a cross-sectional view of the vacuum and positive pressure air passages of this utility model.

[0019] Figure 5 This is a schematic diagram of the guide shaft and sliding bearing of this utility model.

[0020] Figure 6 This is a schematic diagram of the pick-up chip of this utility model.

[0021] Figure 7 This is a schematic diagram of the pitch-changing mechanism of this utility model. Detailed Implementation

[0022] This utility model is described in conjunction with the accompanying drawings.

[0023] like Figures 1 to 6 As shown, a pen cylinder integrating a guide bearing 3 and a pickup device includes a guide assembly, a cylinder, a piston rod assembly, a gas path assembly, and a pickup assembly. The cylinder contains a vacuum chamber 6A and a positive pressure chamber 6B, and a gas pipe connector 1 is located on the top of the cylinder. A cylinder vacuum passage 4A and a cylinder positive pressure passage 4B are formed within the cylinder. The guide assembly includes a guide bearing 3 and a limiting screw 2. The guide bearing 3 is used to mount guide shafts 7 in the X and Y directions, which are disposed within the cylinder. The piston rod assembly includes a piston rod, a piston rod core 601, and a seal. The piston rod core 601 has a hollow structure forming a piston rod vacuum passage 6C. The seal isolates the vacuum chamber 6A, the positive pressure chamber 6B, and the external atmosphere. The gas path assembly allows gas to pass through the gas pipe connector 1, the cylinder vacuum passage 4A, the cylinder positive pressure passage 4B, and the piston rod vacuum passage 6C. The pickup assembly is mounted on the end of the piston rod and is used to pick up a chip 9.

[0024] The beneficial effects that this utility model can achieve include: High integration and compact size: The guide bearing 3, telescopic piston rod, vacuum / positive pressure chamber 6B and air passage are integrated into a single cylinder, eliminating the installation space of an independent guide mechanism. The volume in the XY direction is smaller than that of the existing technology, and multiple cylinders can be connected in close series.

[0025] With strong adaptability to small pitch: multiple cylinders can move to a close-fitting state, with no additional parts occupying the pitch range, and the minimum adaptability pitch is 8mm, which meets the one-time pickup requirements of small pitch chip 9 without the need for multiple pitch changes.

[0026] High operating efficiency: The air circuit and telescopic mechanism respond quickly in coordination, and with the synchronous pickup of multiple cylinders, the single pickup time is shortened, which effectively improves the UPH of the test sorter and reduces the unit packaging and testing cost.

[0027] The sealing element includes a cylinder O-ring 602, a vacuum chamber spacer 603, a piston rod O-ring 604, and a piston Y-ring 605; the cylinder O-ring 602, the vacuum chamber spacer 603, and the piston rod O-ring 604 cooperate to isolate the vacuum chamber 6A from the positive pressure chamber 6B, and the piston Y-ring 605 isolates the positive pressure chamber 6B from the outside atmosphere.

[0028] The piston rod assembly also includes a spring 606, which is sleeved on the outside of the piston rod and is used to push the piston rod back and resist the weight of the chip 9.

[0029] It also includes an end cap 5, which is fixed to the end of the cylinder and is used to limit the extension stroke of the piston rod and provide guidance.

[0030] The pickup component is a suction nozzle 8, which is installed at the end of the piston rod and connected to the vacuum chamber 6A through the vacuum channel 6C of the piston rod, and is used to adsorb the chip 9.

[0031] It also includes a guide shaft 7, which is sleeved and connected to the guide bearing 3. The guide shaft 7 is arranged along the X and Y directions. The end of the guide shaft 7 is used to connect a pitch-changing mechanism to drive the cylinder to move along the guide shaft 7 to adapt to different chip 9 spacings.

[0032] like Figure 7 As shown, the guide shaft 7 is fixed at both ends by the end cap 5, and is embedded in the helical cam groove of the variable pitch screw 11. The variable pitch screw 11 rotates under the drive of the variable pitch motor 12. When the helical cam groove rotates, it drives the end cap 5 to move, thereby realizing the variable pitch of the cylinder.

[0033] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A pen cylinder integrating a guide bearing and a pickup device, characterized in that, The system includes a guide assembly, a cylinder, a piston rod assembly, a gas path assembly, and a pickup assembly. The cylinder contains a vacuum chamber and a positive pressure chamber, and a gas pipe connector is located on its outer top. The cylinder has a cylinder vacuum passage and a cylinder positive pressure passage. The guide assembly includes a guide bearing and a limiting screw; the guide bearing is used to mount guide shafts in the X and Y directions and is located within the cylinder. The piston rod assembly includes a piston rod, a piston rod core, and a seal; the piston rod core has a hollow structure forming a piston rod vacuum passage, and the seal isolates the vacuum chamber, the positive pressure chamber, and the external atmosphere. The gas path assembly allows gas to pass through the gas pipe connector, the cylinder vacuum passage, the cylinder positive pressure passage, and the piston rod vacuum passage. The pickup assembly is mounted on the end of the piston rod and is used to pick up the chip.

2. The pen cylinder according to claim 1, characterized in that, The sealing element includes a cylinder O-ring, a vacuum chamber spacer, a piston rod O-ring, and a piston Y-ring; the cylinder O-ring, vacuum chamber spacer, and piston rod O-ring cooperate to isolate the vacuum chamber from the positive pressure chamber, and the piston Y-ring isolates the positive pressure chamber from the outside atmosphere.

3. The pen cylinder according to claim 1, characterized in that, The piston rod assembly also includes a spring, which is sleeved on the outside of the piston rod.

4. The pen cylinder according to claim 1, characterized in that, It also includes an end cap, which is fixed to the end of the cylinder and is used to limit the extension stroke of the piston rod and provide guidance.

5. The pen cylinder according to claim 1, characterized in that, The pickup component is a suction nozzle, which is installed at the end of the piston rod and connected to the vacuum chamber through the vacuum passage of the piston rod.

6. The pen cylinder according to claim 4, characterized in that, It also includes a guide shaft, which is sleeved and connected to the guide bearing. The guide shaft is arranged along the X and Y directions, and the end of the guide shaft is used to connect to the pitch mechanism.

7. The pen cylinder according to claim 6, characterized in that, It also includes a variable pitch lead screw and a variable pitch motor. The end cover fixes the two ends of the guide shaft in the same direction and is embedded in the helical cam groove of the variable pitch lead screw. The variable pitch lead screw rotates under the drive of the variable pitch motor, and the helical cam groove drives the end cover to move when it rotates.

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