Material pushing mechanism in material piece assembly dust removal device

Abstract

The utility model relates to a material pushing mechanism in a dust removal device for a material sheet assembly, which is positioned on a working table of the dust removal device and is characterized by comprising a guide rail, the guide rail is obliquely arranged on the working table at an angle alpha with the horizontal plane and is positioned below an air tap of the dust removal device, and the inclination of the guide rail enables the material sheet assembly to automatically slide down on the guide rail; the pushing block can slide on the guide rail, the top of the pushing block can be inserted into a feeding opening of the dust removal device, and the top of the pushing block can bear a material sheet assembly entering from the feeding opening; the first linear module can drive the push block to slide back and forth in the inclination direction of the guide rail. By adopting the material pushing mechanism disclosed by the utility model, a single material sheet assembly can automatically enter a dust removal position without manual clamping, and then the pushing block returns under the action of the first linear module, so that the dust removal efficiency of the material sheet assembly can be obviously improved.

Description

Technical Field

[0001] This utility model relates to the technical field of dust removal devices, specifically to a pushing mechanism in a dust removal device mainly used for removing dust from sheet materials carrying components. Background Technology

[0002] In the electrical field, sheet-like assemblies are used, such as circuit boards (on a PCB board where the required components are mounted). Another example is a square sheet-like body formed by multiple interconnected LED beads (including brackets and LED chips located in grooves within the brackets). Because each LED bead is very small, to facilitate their transfer between processes, thin ribs often extend from the brackets of each LED bead and connect to the brackets of adjacent LED beads, thus forming the aforementioned square sheet-like assembly. This assembly can be stored in a cassette, the structure of which can be seen in patent documents CN204243073U and CN221954809U. Clearly, the sheet-like assembly, with its interconnected LED beads, can be conveniently stored and moved between processes for corresponding handling.

[0003] During the production process, dust and other impurities may accumulate on the surface of the aforementioned sheet assembly. To ensure the cleanliness of the assembly, dust removal is necessary. Current dust removal methods include the structure disclosed in Chinese Patent Publication No. CN217183557U. However, this method requires first clamping the four corners of the circuit board (i.e., the sheet assembly) with four pairs of upper and lower fixing plates, and then moving the strip rod with suction holes at the top for dust removal. While this device can remove dust from a single circuit board, it requires manual feeding, manual clamping of the upper and lower fixing plates, and manual unloading. Therefore, the dust removal efficiency needs further improvement. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a pushing mechanism in a dust removal device for sheet assembly that can improve dust removal efficiency, based on the current state of the technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a pushing mechanism in a dust removal device for sheet components, located on the worktable of the dust removal device, characterized in that it includes:

[0006] The guide rail is inclined at an angle α to the horizontal plane and is located below the air nozzle of the dust removal device. The inclination of the guide rail should be such that the material sheet assembly can slide down automatically on it.

[0007] The push block can slide on the guide rail, and the top of the push block can be inserted into the feed inlet of the dust removal device, and the top of the push block can carry the material sheet assembly entering from the feed inlet;

[0008] The first linear module can drive the pusher block to slide back and forth along the inclined direction of the guide rail.

[0009] To ensure smooth airflow, there are multiple guide rails arranged at intervals, and the top cross-section of each guide rail is designed as a cone that gradually increases in size from top to bottom. The lower edge of the cross-section of the push block is designed as a toothed structure that matches each guide rail.

[0010] To reduce friction when the sheet assembly slides, the upper edge of the cross section of the pusher is designed with an upper toothed structure. When the pusher enters the feed inlet, the upper and lower toothed structures of the pusher are used to mesh with the toothed edge of the feed inlet.

[0011] To accommodate dust removal of sheet metal assemblies of different specifications, the system also includes limiting rails located on both sides of the guide rail and arranged in the same direction as the guide rail. The upper end of each limiting rail is fitted into an upper positioning post, and the lower end of each limiting rail is fitted into a lower positioning post. Both the upper and lower positioning posts are fixed to the worktable. A screw rod, distributed parallel to the upper and lower positioning posts, is rotatably connected to the worktable between the upper and lower positioning posts. This screw rod has a first threaded section and a second threaded section with opposite helical directions and the same pitch. The first threaded section corresponds to one of the limiting rails, and the second threaded section corresponds to the other limiting rail. Each limiting rail has a threaded hole that is threadedly connected to the corresponding threaded section. When needed, rotating the screw rod can change the distance between the two limiting rails, thereby allowing the sheet metal assemblies of different specifications to slide up and down.

[0012] Considering that the push block may be unexpectedly obstructed during its movement, in order to avoid damage, the push block is further improved by fixing it to the upper end of the slide rod, which is slidably constrained on the slide plate connected to the first linear module. The slide rod is arranged in the same direction as the movement direction of the push block, and a spring is fitted on the slide rod to ensure that the slide rod always has an upward sliding tendency.

[0013] Furthermore, in order to promptly interrupt the operation of the first linear module when the push block is obstructed, a position sensor is also installed on the slide plate to sense the downward movement of the slide rod after the spring is compressed. This position sensor is connected to the controller of the dust removal device. After receiving the signal from the position sensor, the controller controls the first linear module to stop working, thereby avoiding damage to the corresponding components in the pushing mechanism.

[0014] To facilitate the installation of the spring, a mounting plate is erected on the slide plate and is detachably connected to a positioning block. The positioning block has a stepped hole for the slide rod to pass through. The mounting plate has a limiting hole corresponding to the stepped hole and allowing the slide rod to pass through. The spring is located in the stepped hole, and one end of the spring abuts against a protrusion on the slide rod adjacent to the stepped surface of the stepped hole. The other end of the spring abuts against the mounting plate.

[0015] To ensure better smoothness when the slide bar and push block slide, there are two slide bars, which are distributed parallel to each other at intervals.

[0016] Preferably, the first linear module includes a first cylinder, and two sliders are fixed at intervals on the upper surface of the slide plate. Each slider is slidably mounted on a guide rod, which is located above the slide plate and parallel to the piston rod of the first cylinder. This results in a compact overall structure and smooth sliding.

[0017] Compared with existing technologies, this invention cleverly configures a guide rail with a tilting distribution and a pusher block that slides on the guide rail and supports the material sheet assembly. Utilizing the inclination of the guide rail and the support of the pusher block, the material sheet assembly falling from the feed inlet moves down the guide rail along with the pusher block to a set position due to its own weight. Then, with the help of the pusher block, it slides upward, and during this upward sliding process, air is sprayed from the nozzles in the dust removal device to remove dust. Finally, it is pushed back to the feed inlet by the pusher block. Therefore, using this invention's pushing mechanism, no manual clamping is required; a single material sheet assembly can automatically enter the dust removal position and then return under the action of the first linear module, thus significantly improving the dust removal efficiency of the material sheet assembly. In particular, the use of a multi-guide rail structure with a conical top allows the dust and other impurities blown off by the air nozzle to slide smoothly down between adjacent guide rails with the airflow. This also helps reduce the resistance when the material sheet assembly slides between the guide rails, ensuring the smooth operation of the entire pushing process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure after removing the transparent cover;

[0020] Figure 3 for Figure 2 A right-side 3D view (the pusher block is located in the feed inlet);

[0021] Figure 4 for Figure 3 A 3D schematic diagram after the air nozzle has been removed;

[0022] Figure 5 for Figure 2A left-view stereoscopic diagram;

[0023] Figure 6 for Figure 5 A 3D diagram of the material box after removing one of the boxes;

[0024] Figure 7 for Figure 2 A three-dimensional diagram showing the middle pusher block descending to the set position;

[0025] Figure 8 for Figure 7 A rear-view 3D diagram (with the bottom edge of the feed inlet removed);

[0026] Figure 9 for Figure 7 AA section view diagram. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] In the following description of the embodiments, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "axial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0029] Since the feeding mechanism in this embodiment is applied to the dust removal device for sheet assembly, in order to better understand the structure in the figure and the operating principle of the feeding mechanism, the following description will start from the overall structure of the dust removal device.

[0030] like Figures 1 to 9The dust removal device shown is used to remove dust from wafers containing multiple LED beads. It includes a worktable 1, guide rails 2, push blocks 3, a first linear module 4a, a feeding plate 5, a second linear module 4b, a material box 6, an air nozzle 7, and an air pump (not shown in the figure). The pushing mechanism is located on the worktable and includes the aforementioned guide rails 2, push blocks 3, and the first linear module 4a. The worktable 1 includes a table surface 11, and the dust removal operation is performed on the table surface. To facilitate the installation of the guide rails 2, push blocks 3, and feeding plate 5, and to allow for easy adjustment of their angles relative to the table surface 11 according to dust removal needs, in this embodiment, two spaced and oppositely distributed support plates 1 are erected on the table surface 11 of the worktable. 2. A movable seat 8 is provided between the two support plates 12. The movable seat 8 is hinged between the two support plates 12 by a pin 01 and can rotate relative to the worktable 1. When the movable seat 8 rotates to the required angle, the movable seat 8 is fixed relative to the worktable 1 by a detachable positioning component. Specifically, an arc-shaped hole with the pin as the center or a concentrically distributed positioning hole 121 with the pin as the center can be opened on the support plate 12. The positioning component can be a bolt 02. After the bolt passes through the arc-shaped hole or the positioning hole, it passes through the through hole on the movable seat 8 and is connected to the nut. The guide rail 2, the feeding plate 5, the air nozzle 7, and the first linear module 4a and the second linear module 4b are all installed on the movable seat 8.

[0031] The aforementioned movable seat 8 includes two relatively spaced side plates 81 and a base plate 82 connected between the two side plates. The two side plates 81 are respectively distributed close to the corresponding support plate 12.

[0032] The aforementioned guide rail 2 is located between the two side plates 81 and is inclined relative to the workbench surface 11, i.e., inclined at an angle α to the horizontal plane. In the figure, α is 45°. This angle can be adjusted, but it must satisfy the following condition: the inclination of the guide rail 2 must allow the material sheet assembly 100 passing through the feed inlet 51 to slide down the guide rail 2 along with the pusher block 3. In other words, the material sheet assembly 100 must be able to slide down the guide rail 2 automatically under its own weight. Furthermore, considering the friction generated when the material sheet assembly 100 slides, to minimize this friction and ensure smooth airflow from top to bottom during dust removal, this embodiment uses multiple guide rails 2 (see [link to documentation]). Figure 7 and Figure 8 The guide rails 2 are arranged at intervals, and the top cross section of each guide rail 2 is designed as a cone that gradually increases from top to bottom. In this way, the contact area between the guide rails and the material sheet assembly 100 can be reduced. In addition, this cone-shaped structure can also guide the airflow after dust removal to carry the dust down.

[0033] The push block 3 is mounted on the guide rail 2 and connected to the first linear module 4a. Under the driving action of the first linear module 4a, it can slide up and down along the guide rail 2. In order to match the structure of the multiple guide rails 2, the lower edge of the cross section of the push block 3 in this embodiment is designed as a lower tooth structure that matches each guide rail 2. The first linear module 4a can adopt a structure of motor and lead screw and nut pair, but in this embodiment, the first linear module 4a preferably includes a first cylinder 41a. The piston rod of the first cylinder 41a is connected to a slide plate 42a. The upper end surface of the slide plate 42a is supported on the guide rod 44a by two spaced sliders 43a. The guide rod 44a is parallel to the piston rod of the first cylinder 41a and is located above the slide plate 42a. The guide rod can be supported on the movable seat 8 by the seat 83 (when the movable seat 8 is adjusted to the position, in order to improve the stability of the guide rod 44a, the lower end of the guide rod 44a can be positioned on the table 11 by the fixing bracket 13). The push block 3 is installed on the slide plate 42a. Thus, with the action of the first cylinder 41a, the slide plate 42a is driven to move, thereby achieving the purpose of pushing the push block 3 to slide on the guide rail 2.

[0034] During use, considering that the pusher 3 may be unexpectedly obstructed during movement, in order to promptly interrupt the operation of the first linear module 4a and avoid damage to components such as the pusher, it is preferable to slidably constrain a slide rod 45a on the aforementioned slide plate 42a. The sliding direction of the slide rod 45a is consistent with the movement direction of the pusher 3. The pusher 3 is fixed to the upper end of the slide rod 45a, and a spring 46a is fitted on the slide rod 45a to ensure that the slide rod 45a always has an upward sliding tendency. To facilitate the installation of the spring 46a and ensure the smooth sliding of the slide rod 45a, a [missing information - likely a component or material] is used. Figure 7 and Figure 9 As can be seen, an upright mounting plate 421a is provided on the slide plate 42a (the mounting plate 421a is located at the end of the slide plate 42a in the figure, that is, it is formed by bending the end of the slide plate 42a, or it can be directly set separately and then fixed to the slide plate 42a). The positioning block 47a is fixed to the mounting plate 421a by bolts. In this embodiment, there are two slide rods 45a, which are distributed side by side. The positioning block 47a has stepped holes 471a that correspond to the slide rods 45a. Please refer to [link to relevant documentation]. Figure 9The mounting plate 421a has two limiting holes corresponding to the stepped hole 471a, allowing the corresponding sliding rod 45a to pass through. Each sliding rod 45a has a protrusion that can be located in the large hole of the stepped hole 471a. One end of each sliding rod 45a is inserted into the stepped hole 471a and exposed, fixing the aforementioned push block 3. There are also two springs 46a, each spring 46a is sleeved on the corresponding sliding rod 47a and located in the large hole of the corresponding stepped hole 471a. One end of the spring 46a abuts against the protrusion of the sliding rod 45a. At this time, the protrusion is adjacent to the stepped surface of the stepped hole 471a, and the stepped surface will restrict the sliding rod 45a from continuing to slide upward. The other end of the spring 46a abuts against the mounting plate 421a. The other end of each sliding rod 45a then passes through the limiting hole on the mounting plate 421a and the sensing plate 48a in sequence, and is connected to a nut. Thus, under the action of the spring, the push block 3 and each sliding rod 45a can always have an upward sliding tendency. At the same time, a position sensor 03 is also installed on the slide plate 42a to sense the sliding rod 45a sliding down after the spring 46a is compressed. That is, when the push block 3 encounters an obstacle and is obstructed during its upward sliding, as the first cylinder 41a continues to operate, the push block 3 will drive each sliding rod 45a to slide down relative to the slide plate 42a. The sensing plate 48a will trigger the position sensor 03, and then the controller of the dust removal device will control the first cylinder 41a to stop working, thereby avoiding damage to the corresponding components in the device.

[0035] The aforementioned feeding plate 5 is inclined towards the upper end face of the guide rail 2 and is staggered with the upper end face of the guide rail 2 on the movable seat 8. In the figure, the feeding plate 5 and the guide rail 2 are basically perpendicular. A feeding port 51 for the material sheet assembly is provided in the middle of the feeding plate 5. After the push block 3 slides upward, it can be inserted into the feeding port 51. Considering that the friction between the feeding port 51 and the material sheet assembly should be as small as possible, and combined with the specific structure of the push block 3, the upper edge of the cross-section of the push block 3 is also designed as an upper toothed structure. At this time, the inner wall surface of the feeding port 51, corresponding to the upper and lower edges of the push block 3, is designed as a toothed structure that meshes with the upper and lower toothed structures. Please refer to [link to relevant documentation]. Figure 6 .

[0036] The aforementioned material box 6 is mounted on the feed plate 5. The material box 6 can adopt the structure of the prior art, but it is required that multiple slots 61 be correspondingly opened on the inner surfaces of its two side walls. The extension direction of each slot 61 needs to be consistent with the tilt direction of the guide rail 2. The slots 61 that correspond one-to-one (i.e., slots 61 at the same height on the inner surfaces of the two sides) are called a set of slots. It needs to be able to hold the two edges of the material sheet assembly 100. One material box 6 can be placed, but it is not limited to one. In the figure, three are placed in order to improve production efficiency. After all the material sheet assemblies 100 in the three material boxes 6 have been cleaned of dust, they are replaced manually.

[0037] The aforementioned second linear module 4b can drive the material box 6 to slide up and down along the length of the feeding plate 5. This second linear module 4b can also be a cylinder, i.e., using the piston rod of a second cylinder to pull the material box. However, for more precise driving distance, a structure of motor, lead screw, and nut pair is preferred. That is, as shown in Figure 2, the second linear module 4b includes a pulling motor 41b, a lead screw 43b, and a pulling nut 44b. The pulling motor 41b is a servo motor or stepper motor, and its output shaft is connected to the lead screw 43b. The lead screw 43b is supported in the feeding seat below the feeding plate 5. The pulling nut 44b is threaded onto the lead screw 43b. The feeding plate 5 has elongated holes 53 distributed parallel to the lead screw 43b. Please refer to [reference needed]. Figure 5 , 6 and Figure 8 The pulling nut 44b is then connected to a receiving seat 42b via a pulling block 45b passing through the elongated hole 53. The receiving seat 42b includes upper and lower baffles 421b spaced apart and multiple connecting rods 422b connecting the two baffles. The three material boxes 6 are located between the two baffles 421b. Thus, as the pulling motor 41b starts, it drives the lead screw 43b to rotate. The pulling block 45b, limited by the elongated hole 53, restricts the rotation of the pulling nut 44b, allowing the pulling nut 44b to move only up and down along the lead screw 43b. Ultimately, the pulling block 45b pulls the receiving seat 42b to slide up and down, thereby driving the three material boxes 6 to move synchronously. To ensure that the material boxes 6 move along the correct path during the up and down sliding process, the feed plate 5 is also equipped with guide members 52 located on both sides of the feed inlet 51 to guide the material boxes 6 to slide up and down. Please refer to [link to relevant documentation]. Figure 6 This ensures that when the material component 100 in the material box 6 passes through the feed inlet 51, it can fall down precisely corresponding to the feed inlet 51.

[0038] The aforementioned air nozzle 7 is arranged above the aforementioned guide rail 2 and is connected to the aforementioned air pump via a solenoid valve (not shown in the figure); and in order to have a better dust removal effect, the air nozzle 7 in the figure has multiple air outlets, which are arranged in a straight line along the arrangement direction of the guide rail 2. The blowing direction of the air nozzle 7 is opposite to the return direction of the push block 3 and forms an acute angle with the guide rail 2.

[0039] Considering that the sheet assembly 100 has different specifications, that is, the sheet may vary in width and length, in order to adapt to dust removal of sheet assemblies of different specifications, limiting rails 9 arranged in the same direction as the guide rail 2 are also provided on both sides of the guide rail 2. The upper end of each limiting rail 9 is sleeved in the upper positioning post 04, and the lower end of each limiting rail 9 is sleeved on the lower positioning post 05. The two ends of the upper and lower positioning posts are respectively fixed to the side plates 81 of the corresponding side of the movable seat 8, and screws distributed parallel to the upper and lower positioning posts are provided between the upper and lower positioning posts. The screw 06 has two ends rotatably connected to the corresponding side plates 81 of the movable seat 8. The screw 06 has a first threaded section and a second threaded section with opposite helical directions and the same pitch. The first threaded section corresponds to one of the limiting rails 9, and the second threaded section corresponds to the other limiting rail 9. Each limiting rail 9 has a threaded hole that is threadedly connected to the corresponding threaded section. When adjustment is needed, the distance between the two limiting rails 9 can be changed by rotating the screw 06, so that it can be conveniently applied to material assemblies of different specifications.

[0040] To ensure a clear view of the dust removal process and prevent other dust from falling in, a transparent cover 14 is installed on the workbench. This transparent cover 14 has an isolation chamber where the movable seat 8, guide rail 2, push block 3, first linear module, and air nozzle 7 are located. The dust removal operation is completed inside the transparent cover 14. A suction port for the suction device 07 is opened at the bottom of the isolation chamber. The suction device 07 can be a vacuum cleaner or a vacuum pump, so that the dust blown off during the dust removal process is discharged in time through the suction port.

[0041] The dust removal device controller can be a PLC controller or a PC, or other existing control systems can be selected as needed. The required start switches or indicator lights can be installed on the table. According to the work requirements, it can control the operation of the first linear module, the second linear module and the air pump.

[0042] When dust removal is required, first cylinder 41a should be activated beforehand to insert push block 3 into feed inlet 51. Please refer to [link / reference]. Figure 4 Make the upper surface of push block 3 flush with the surface of feed plate 5. Please refer to [link / reference]. Figure 6 and Figure 7Simultaneously, the pulling motor 41b is controlled to pull the three material boxes 6 to the highest position of the upper plate 5, and the bottommost material piece assembly (referred to as the first material piece assembly) in the bottommost material box 6 is aligned with the feed inlet 51. At this time, due to its own weight, the end face of the first material piece assembly will abut against the push block 3. Then, the first cylinder 41a is activated, causing the push block 3 to push the first material piece assembly down along the guide rail 2. That is, at this time, the first material piece assembly follows the push block 3 down the guide rail 2 after passing the feed inlet 51 on the upper plate 5, until the push block 3 slides down to the set position. The first cylinder 41a causes the push block 3 to return, driving the first material piece assembly to slide up. The controller in the dust removal device controls the solenoid valve to open, the air pump to start, and the air nozzle 7 to start blowing air to remove dust from the first material piece assembly. Please refer to Figure 7 Under the influence of airflow, the blown-off dust slides smoothly down between adjacent guide rails 2 and is eventually sucked away by the suction device 07 through the dust inlet for further processing. As the pusher block 3 continues to slide upward, the first material piece assembly is finally pushed back into the original slot 61 of the material box 6 after passing through the feed inlet 51. Then the pull motor 41b starts again, causing the three material boxes 6 to slide down a short distance, which is equal to the distance between adjacent slots. That is, after the pull motor 41b is activated, the material piece assembly above the first material piece assembly (referred to as the second material piece assembly) is aligned with the feed inlet 51. Similarly, the second material piece assembly abuts against the pusher block 3 in the feed inlet 51. This process is repeated until all the material pieces in the three material boxes 6 are dusted. Finally, the three material boxes 6 are manually removed and replaced with a new material box 6 containing the material pieces to be dusted for another dust removal operation. Obviously, the dust removal device of this invention can automatically perform dust removal operations without the need for manual clamping of the material sheet assembly.

[0043] During the dust removal process described above, the material box can also be pushed intermittently from bottom to top to achieve the same dust removal operation.

Claims

1. A pushing mechanism in a green sheet assembly dust removal apparatus, which is located on a worktable (1) of the dust removal apparatus, characterized in that Including: The guide rail (2) is inclined at an angle α to the horizontal plane on the workbench (1) and below the air nozzle (7) of the dust removal device. The inclination of the guide rail (2) should be such that the material sheet assembly (100) can slide down automatically on it. The push block (3) can slide on the guide rail (2), the top of the push block (3) can be inserted into the feed inlet (51) of the dust removal device, and the top of the push block (3) can carry the material sheet assembly (100) entering from the feed inlet (51). The first linear module can drive the pusher (3) to slide back and forth along the inclined direction of the guide rail (2).

2. The pusher mechanism of claim 1, wherein: There are multiple guide rails (2) arranged at intervals, and the top cross section of each guide rail (2) is designed as a cone that gradually increases from top to bottom. The lower edge of the cross section of the push block (3) is designed as a lower tooth structure that matches each guide rail (2).

3. The pusher mechanism of claim 2, wherein: The upper edge of the cross section of the push block (3) is designed with an upper toothed structure. When the push block (3) enters the feed inlet (51), the upper and lower toothed structures of the push block (3) are used to mesh with the toothed edge of the feed inlet (51).

4. The pusher mechanism of claim 1, wherein: It also includes limiting rails (9) located on both sides of the guide rail (2) and arranged in the same direction as the guide rail (2). The upper end of each limiting rail (9) is sleeved in the upper positioning post (04), and the lower end of each limiting rail (9) is sleeved on the lower positioning post (05). The upper positioning post (04) and the lower positioning post (05) are both fixed on the worktable (1). A screw (06) distributed parallel to the upper and lower positioning posts is also rotatably connected on the worktable (1) between the upper and lower positioning posts. The screw (06) has a first threaded section and a second threaded section with opposite helical directions and the same pitch. The first threaded section corresponds to one of the limiting rails (9), and the second threaded section corresponds to the other limiting rail (9). Each limiting rail (9) has a screw hole that is threadedly connected to the corresponding threaded section.

5. The pusher mechanism according to any one of claims 1 to 4, wherein: The push block (3) is fixed to the upper end of the slide rod (45a), which is slidably constrained on the slide plate (42a) connected to the first linear module (4a). The arrangement direction of the slide rod (45a) is consistent with the movement direction of the push block (3), and a spring (46a) is sleeved on the slide rod (45a) to make the slide rod (45a) always have an upward sliding tendency.

6. The pusher mechanism of claim 5, wherein: The slide plate (42a) is also equipped with a position sensor (03) that can sense when the slide bar (45a) moves down after the spring (46a) is compressed.

7. The pusher mechanism of claim 5, wherein: A mounting plate (421a) is erected on the sliding plate (42a) and is detachably connected to a positioning block (47a). The positioning block (47a) has a stepped hole (471a) for the sliding rod (45a) to pass through. The mounting plate (421a) has a limiting hole corresponding to the stepped hole (471a) and allowing the sliding rod (45a) to pass through. The spring (46a) is located in the stepped hole (471a), and one end of the spring (46a) abuts against a protrusion on the sliding rod (45a) adjacent to the stepped surface of the stepped hole (471a). The other end of the spring (46a) abuts against the mounting plate (421a).

8. The pusher mechanism of claim 7, wherein: There are two slide bars (45a), which are parallel to each other and spaced apart.

9. The pusher mechanism of claim 5, wherein: The first linear module (4a) includes a first cylinder (41a). Two sliders (43a) are fixed at intervals on the upper surface of the slide plate (42a). Each slider (43a) is slidably mounted on a guide rod (44a). The guide rod (44a) is located above the slide plate (42a) and is distributed parallel to the piston rod of the first cylinder (41a).

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