Lift pin mechanism

Abstract

The utility model discloses a kind of lifting needle mechanisms, including workbench, backing plate, multiple lifting needles, lifting needle is used to support workpiece, lifting needle passes through workbench, workbench can move up and down, workbench includes sink hole at its upper end and with multiple lifting needles one-to-one correspondence, lifting needle includes needle head at its top, the top of needle head is stretched out the upper end surface of workbench upwards, with workbench moving upwards, needle head is inserted into sink hole and the bottom of needle head and the bottom surface of sink hole abut, the upper end surface of needle head is not higher than the upper end surface of workbench. The utility model has the layout mode of multiple lifting needles, to adapt to the different needs of different workpiece required support point.

Description

Technical Field

[0001] This utility model relates to the technical field of substrate transmission auxiliary mechanisms for display panels, and more specifically, to a lifting pin mechanism. Background Technology

[0002] Currently, in the manufacturing equipment for printed OLED display panels, the substrate is a large glass plate. During the processing on the substrate, display areas and non-display areas are formed. After the substrate is finally cut, the display area is a screen glass plate of a specified size (such as 32 inches).

[0003] During substrate transfer, a lifting pin mechanism is required to receive and transport the substrate. The top of the lifting pin extends out onto a support plate to hold the glass plate, and the lifting pin descends to place the glass plate onto the support plate. Multiple lifting pins are used. Because the lifting pins need to reach the non-display area of ​​the substrate, and the display area of ​​the substrate varies in size, when supporting substrates of different sizes, multiple lifting pins rise and fall simultaneously with their tops at the same height. This results in some lifting pins directly pressing against the display area, causing pressure and ultimately affecting the molding quality. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a lifting needle mechanism with multiple high and low position layouts of the lifting needles to meet the different support point requirements of different workpieces.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a lifting needle mechanism, comprising a worktable, a pad, and multiple lifting needles. The lifting needles are used to support the workpiece and pass through the worktable, which is capable of moving up and down. The worktable includes a countersunk hole at its upper end that corresponds to each of the multiple lifting needles. Each lifting needle includes a needle tip at its top, with the tip extending upwards from the upper surface of the worktable. As the worktable moves upwards, the needle tip extends into the countersunk hole, and the bottom of the needle tip abuts against the bottom surface of the countersunk hole. The upper surface of the needle tip is not higher than the upper surface of the worktable. The pad includes a high surface that corresponds to at least some of the lifting needles. The top of the high surface abuts against the bottom of the corresponding lifting needle. The top of the lifting needle abutting against the top of the high surface is higher than the top of the lifting needle not abutting against the high surface, so that the multiple lifting needles are distributed at different heights.

[0006] The present invention is further configured such that the pad has a channel, the bottom of the lifting needle can abut against the upper end surface of the pad or extend into the channel, and the high surface is the contact surface between the upper end surface of the pad and the bottom of the lifting needle.

[0007] The present invention is further configured such that a first limiting sleeve is installed on the worktable, the lifting needle passes through the first limiting sleeve, and a countersunk hole is provided at the upper end of the first limiting sleeve.

[0008] The present invention is further configured such that a second limiting sleeve is installed at the lower end of the first limiting sleeve, the lifting needle passes through the second limiting sleeve, and the lifting needle can move up and down along the inner wall of the second limiting sleeve.

[0009] The present invention is further configured such that the gap between the inner wall of the first limiting sleeve and the outer wall of the lifting needle is greater than the gap between the inner wall of the second limiting sleeve and the outer wall of the lifting needle.

[0010] The present invention is further configured such that, with the bottom surface of the needle abutting against the inner bottom surface of the countersunk hole, the worktable moves upward to drive the lifting needle to move upward, so that the bottom position of the lifting needle is higher than the high position surface.

[0011] The present invention is further configured to include a base plate, the base plate being detachably connected to a pad, the channel being a through hole, the bottom of the lifting needle extending into the channel passing through the channel and abutting against the upper end surface of the base plate.

[0012] The present invention is further configured such that when the worktable moves upward, the top of the lifting pin extends into the upper surface of the worktable, thereby placing the workpiece supported by the lifting pin on the upper surface of the worktable.

[0013] The present invention is further configured such that the pad includes a protrusion located on its upper end surface, and the upper end surface of the protrusion is a high-position surface.

[0014] The present invention is further configured such that, when the bottom position of the lifting needle is higher than the high position surface, the pad is moved or replaced so that the position of at least part of the high position surface that abuts against the bottom of the lifting needle changes.

[0015] In summary, this utility model has the following beneficial effects:

[0016] 1. By using pads with different hole positions, the tops of multiple lifting pins are positioned at varying heights, creating multiple lifting pin layouts to accommodate the different support point requirements of various workpieces. This increases the flexibility of the production line when compatible with glass panels of different specifications, while also solving the problem of excessive downtime in traditional lifting pin layouts and improving equipment production efficiency.

[0017] 2. Avoid direct contact between the lifting pin and the display area of ​​the glass panel to prevent the lifting pin from causing pressure on the display area and improve the quality of the process. Attached Figure Description

[0018] Figure 1 This is a perspective view of Example 1;

[0019] Figure 2 This is a cross-sectional view of Embodiment 1;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a diagram showing the state where the lifting pin is separated from the pad in Example 1;

[0022] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0023] Figure 6 This is a cross-sectional view of Example 2.

[0024] Reference numerals: base plate 1, pad plate 2, channel 21, protrusion 22, worktable 3, first limiting sleeve 31, countersunk hole 311, second limiting sleeve 32, workpiece 4, lifting needle 5, gravity block 51, needle head 52, positioning seat 6. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] like Figures 1-5 As shown, this embodiment discloses a lifting needle mechanism, including a worktable 3, a pad 2, and multiple lifting needles 5. The top of the lifting needles 5 is used to support the workpiece 4. The lifting needles 5 pass through the worktable 3, and the worktable 3 can move up and down. The driving mechanism of the worktable 3 is not shown, but the driving mechanism of the worktable 3 can be a lifting drive motor, a lead screw lifting mechanism, etc.

[0028] like Figure 2 , Figure 3 As shown, the worktable 3 includes countersunk holes 311 located at its upper end and corresponding to a plurality of lifting pins 5. Specifically, the worktable 3 is equipped with a first limiting sleeve 31, which is threadedly inserted and fixed from the bottom of the worktable 3. The upper end face of the first limiting sleeve 31 is not higher than the upper end face of the worktable 3. The upper end of the first limiting sleeve 31 is provided with a countersunk hole 311, which is recessed downward along the upper end face of the first limiting sleeve 31.

[0029] like Figure 3As shown, a second limiting sleeve 32 is installed at the bottom of the first limiting sleeve 31, and the second limiting sleeve 32 is threadedly inserted into the first limiting sleeve 31. The lifting needle 5 passes through the first limiting sleeve 31 and the second limiting sleeve 32. The gap between the inner wall of the first limiting sleeve 31 and the outer wall of the lifting needle 5 is greater than the gap between the inner wall of the second limiting sleeve 32 and the outer wall of the lifting needle 5. The lifting needle 5 can move up and down along the inner wall of the second limiting sleeve 32. The second limiting sleeve 32 plays a major guiding role for the lifting needle 5. The second limiting sleeve 32 is a vulnerable part, and it is easy to disassemble and replace.

[0030] like Figure 2 , Figure 3 As shown, the lifting needle 5 includes a needle head 52 located at its top. Both the lifting needle 5 and the needle head 52 are cylindrical structures. The needle head 52 is fixedly installed on the top of the lifting needle 5. The outer diameter of the needle head 52 is larger than that of the lifting needle 5, and the top of the needle head 52 extends upward beyond the upper end face of the worktable 3. Figure 4 , Figure 5 As shown, as the worktable 3 moves upward, the needle 52 extends downward into the upper surface of the worktable 3, and the bottom of the needle 52 abuts against the bottom surface of the countersunk hole 311, while the upper surface of the needle 52 is not higher than the upper surface of the worktable 3.

[0031] like Figure 2 As shown, the lifting pin 5 supports the workpiece 4, which is a glass display panel. As the worktable 3 moves upward, the pin 52 extends downward into the countersunk hole 311, thereby placing the workpiece 4 supported by the lifting pin 5 on the upper surface of the worktable 3. The worktable 3 then lifts the workpiece 4 for subsequent operations. In specific operation, in the initial state, the lifting pin 5 extends out of the top of the worktable 3, and the workpiece 4 is grasped by the robotic arm and placed on the upper end of the pin 52. Since it is difficult to place the workpiece 4 directly flat on the worktable 3 when the robotic arm is grasping it, the lifting pin 5 is used to receive and transport the workpiece 4. The robotic arm has a fork-shaped structure, and it lifts the workpiece 4 to move. The fork-shaped robotic arm can be misaligned with the lifting pin 5 to avoid interference.

[0032] like Figure 2 As shown, a gravity block 51 is fixedly installed at the bottom of the lifting needle 5. The lifting needle 5 is threaded into the gravity block 51. Since the lifting needle 5 has a small diameter and light weight, the gravity block 51 is used to pull the lifting needle 5 down when the worktable 3 rises, so as to avoid the situation where the needle tip 52 cannot be inserted into the countersunk hole 311.

[0033] The pad 2 includes a high surface that corresponds one-to-one with at least some of the lifting pins 5. The top of the high surface abuts against the bottom of the corresponding lifting pin 5. More precisely, the top of the high surface abuts against the bottom of the corresponding gravity block 51. The top of the gravity block 51 that abuts against the top of the high surface is higher than the top of the gravity block 51 that does not abut against the high surface, so that the multiple lifting pins 5 are distributed at different heights.

[0034] like Figure 2 As shown, the pad 2 has a channel 21. The bottom of the lifting pin 5 can abut against the upper surface of the pad 2 or extend into the channel 21. More precisely, the bottom of the gravity block 51 can abut against the upper surface of the pad 2 or extend into the channel 21, so that the top heights of the multiple lifting pins 5 are different. In this embodiment, the high surface is the contact surface between the upper end of the pad 2 and the bottom of the lifting pin 5. More precisely, the high surface is the contact surface between the upper end of the pad 2 and the bottom of the gravity block 51.

[0035] It also includes a base plate 1, with a pad 2 detachably connected to the upper end of the base plate 1. The channel 21 is a through hole, and the bottom of the gravity block 51 extending into the channel 21 passes through the channel 21 and abuts against the upper end surface of the base plate 1. The pad 2 also includes a low surface, and the upper end surface of the base plate 1 is a low surface.

[0036] like Figure 1 , Figure 2 As shown, a positioning seat 6 is installed on the base plate 1. The pad 2 moves from the side away from the positioning seat 6 to the side closer to the positioning seat 6. The positioning seat 6 limits the pad 2. The positioning seat 6 is an L-shaped positioning block. After the positioning seat 6 is positioned, it is fixed to the base plate 1.

[0037] Since the workpiece 4 is very thin when the lifting pin 5 supports it, for example, a workpiece 4 with a thickness of 0.5mm will be locally concave when supported by the lifting pin 5. The lowest point of the concavity is higher than the top of the lower lifting pin 5. That is, the distance between the high surface and the low surface of the pad 2 needs to be set to be greater than the maximum size of the workpiece 4 that is allowed to concave. Preferably, the distance between the high surface and the low surface of the pad 2 is set to 8mm-12mm.

[0038] like Figure 4 , Figure 5 As shown, when the worktable 3 rises, the needle 52 extends into the countersunk hole 311. With the bottom surface of the needle 52 abutting against the inner bottom surface of the countersunk hole 311, the worktable 3 continues to move upward, causing the lifting needle 5 to move upward synchronously, so that the bottom position of the lifting needle 5 is higher than the high surface of the pad 2.

[0039] like Figure 4 As shown, with the bottom of the lifting pin 5 above the high surface of the pad 2, the pad 2 is moved or replaced so that the position of the high surface that at least partially abuts against the lifting pin 5 changes.

[0040] Specifically, when the pad 2 is replaced, different pads 2 have holes 21 in different positions, so that after different pads 2 are installed, the tops of multiple lifting pins 5 form different height positions. The raised lifting pins 5 are used to support the workpiece 4. After different pads 2 are installed, multiple layouts of lifting pins 5 are formed to meet the different support point requirements of different workpieces 4.

[0041] When the movable pad 2 is selected, after the pad 2 is moved, the position of its channel 21 changes. The portion of the lifting pins 5 that were originally in contact with the upper surface (i.e., the high surface) of the pad 2 now corresponds to the channel 21, and their top height decreases after they are lowered. The portion of the lifting pins 5 that were originally inserted into the channel 21 (actually gravity blocks 51) now corresponds to the upper surface (i.e., the high surface) of the pad 2, and their top position increases after they are lowered. Therefore, by moving the pad 2, the position of the channel 21 is changed, thus altering the height distribution of the tops of the lifting pins 5.

[0042] The lifting pin 5 is not removed during the entire use process because there are many lifting pins 5, and the operation of removing and replacing them is inefficient. In addition, for different support requirements, the operator is prone to making mistakes during operation, which may cause the lifting pin 5 to hit the display plate of the workpiece 4 and affect the product quality.

[0043] Example 2: The difference from Example 1 lies only in the difference between the high and low surfaces of the pad 2. In this example, the pad 2 includes a protrusion 22 on its upper surface. Preferably, the protrusion 22 is fixedly installed on the upper end of the pad 2, and the upper surface of the protrusion 22 is higher than the upper surface of the pad 2. The upper surface of the protrusion 22 serves as the high surface of the pad 2. The upper surface of the protrusion 22 abuts against the lifting pin 5 (actually a gravity block 51) so that the top of the lifting pin 5 is in a higher position. At this time, the upper surface of the pad 2 is the low surface, and the gravity block 51 connected to the bottom of the lower-positioned lifting pin 5 abuts against the upper surface of the pad 2. The method for adjusting the position of the high and low surfaces of the pad 2 is basically the same as in Example 1, except that the position of the protrusion 22 is changed to change the distribution of the higher-positioned lifting pin 5.

[0044] Example 3: A method for adjusting the height of a lifting needle, using the lifting needle mechanism of Example 1 or Example 2, with the specific adjustment steps as follows:

[0045] ① When no workpiece 4 is placed on the upper end of the worktable 3, the worktable 3 moves upward under the drive of the drive mechanism, and the needle 52 extends into the countersunk hole 311, with the bottom surface of the needle 52 abutting against the bottom surface of the countersunk hole 311.

[0046] ② The worktable 3 continues to move upward, causing the lifting pin 5 to move upward. The lifting pin 5 (actually a gravity block 51) moves to its bottom position, which is higher than the high surface. In the first embodiment, the gravity block 51 moves to its bottom position, which is higher than the upper surface of the pad 2. In the second embodiment, the gravity block 51 moves to its bottom position, which is higher than the upper surface of the protrusion 22, so that the gravity block 51 is disengaged from the pad 2 vertically, facilitating the lateral movement of the pad 2.

[0047] ③Move or replace the pad 2 to change the height distribution of the tops of the multiple lifting pins 5.

[0048] In Embodiment 1, when the pad 2 is replaced, different pads 2 have different positions of the channels 21, resulting in different heights of the tops of the multiple lifting pins 5 after installation. This creates various layouts of lifting pins 5 to accommodate the different support points required by different workpieces 4. When the pad 2 is moved, the position of its channels 21 changes. The lifting pins 5 that were originally in contact with the upper surface (high surface) of the pad 2 now correspond to the channels 21, and their top height decreases after being lowered. The lifting pins 5 that were originally inserted into the channels 21 (actually gravity blocks 51) now correspond to the upper surface (high surface) of the pad 2, and their top position increases after being lowered. Therefore, by moving the pad 2, the position of the channels 21 is changed, altering the height distribution of the tops of the lifting pins 5.

[0049] In Embodiment 2: When the replacement pad 2 is selected, different pads 2 have protrusions 22 with different installation positions. After different pads 2 are installed, the distribution of the lifting pins 5 at higher positions supported by the protrusions 22 is different. When the movable pad 2 is selected, after the pad 2 is moved, the position of the protrusions 22 changes. After the lifting pins 5 fall, the distribution of the lifting pins 5 that abut against the protrusions 22 also changes, thereby changing the height distribution of the top of the lifting pins 5.

[0050] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A lifting needle mechanism, characterized in that, The device includes a worktable (3), a pad (2), and multiple lifting pins (5). The lifting pins (5) are used to support the workpiece (4). The lifting pins (5) pass through the worktable (3). The worktable (3) can move up and down. The worktable (3) includes a countersunk hole (311) located at its upper end and corresponding to each of the multiple lifting pins (5). The lifting pin (5) includes a needle tip (52) located at its top. The top of the needle tip (52) extends upward out of the upper end face of the worktable (3). As the worktable (3) moves upward, the needle tip (52) extends into the countersunk hole (311) and the bottom of the needle tip (52) abuts against the bottom surface of the countersunk hole (311). The upper end face of the needle tip (52) is not higher than the upper end face of the worktable (3). The pad (2) includes a high surface that corresponds one-to-one with at least a portion of the lifting pins (5). The top of the high surface abuts against the bottom of the corresponding lifting pin (5). The top position of the lifting pin (5) that abuts against the top of the high surface is higher than the top position of the lifting pin (5) that does not abut against the high surface, so that the plurality of lifting pins (5) are distributed at different heights.

2. The lifting needle mechanism according to claim 1, characterized in that, The pad (2) is provided with a channel (21), and the bottom of the lifting needle (5) can abut against the upper surface of the pad (2) or extend into the channel (21). The high surface is the contact surface between the upper surface of the pad (2) and the bottom of the lifting needle (5).

3. The lifting needle mechanism according to claim 1, characterized in that, The workbench (3) is equipped with a first limiting sleeve (31), the lifting needle (5) passes through the first limiting sleeve (31), and the upper end of the first limiting sleeve (31) is provided with the countersunk hole (311).

4. The lifting needle mechanism according to claim 3, characterized in that, The lower end of the first limiting sleeve (31) is equipped with a second limiting sleeve (32), the lifting needle (5) passes through the second limiting sleeve (32), and the lifting needle (5) can move up and down along the inner wall of the second limiting sleeve (32).

5. The lifting needle mechanism according to claim 4, characterized in that, The gap between the inner wall of the first limiting sleeve (31) and the outer wall of the lifting needle (5) is greater than the gap between the inner wall of the second limiting sleeve (32) and the outer wall of the lifting needle (5).

6. The lifting needle mechanism according to claim 3, characterized in that, With the bottom surface of the needle (52) abutting against the inner bottom surface of the countersunk hole (311), the worktable (3) moves upward, causing the lifting needle (5) to move upward, so that the bottom position of the lifting needle (5) is higher than the high surface.

7. The lifting needle mechanism according to claim 2, characterized in that, It also includes a base plate (1), which is detachably connected to the pad plate (2). The channel (21) is a through hole, and the bottom of the lifting pin (5) extending into the channel (21) passes through the channel (21) and abuts against the upper end surface of the base plate (1).

8. The lifting needle mechanism according to claim 1, characterized in that, When the worktable (3) moves upward, the top of the lifting pin (5) extends into the upper surface of the worktable (3), thereby placing the workpiece (4) supported by the lifting pin (5) on the upper surface of the worktable (3).

9. A lifting needle mechanism according to claim 1, characterized in that, The pad (2) includes a protrusion (22) on its upper end face, the upper end face of the protrusion (22) being the high position surface.

10. A lifting needle mechanism according to claim 1, characterized in that, With the bottom of the lifting pin (5) above the high surface, move or replace the pad (2) so that the position of at least part of the high surface that abuts against the bottom of the lifting pin (5) changes.

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