Vacuum adsorption stage compatible with multiple size specifications
Patent Information
- Application Number
- CN202522105667.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-09-29
AI Technical Summary
然而，常规的真空吸附载台在面对尺寸差异较大的产品时，暴露出诸多局限性
[0017]相比现有的真空载台，本实用新型通过在放置工作台上设置吸附孔并配合真空系统，实现了对产品的非接触式主动吸附固定。能均匀分布吸附力，有效避免传统机械夹持可能造成的产品表面压痕或损伤，特别适用于玻璃基板等表面光洁度要求高的精密制品。吸附固定响应迅速，提高了上下料效率。在放置工作台一侧设置了端部定位块，其形成的直角定位槽为产品提供了一个快速、精准的初始定位基准。这一设计极大地简化了上料过程中的对位操作，降低了操作难度和对操作人员技能的要求，有利于提升生产节拍和定位一致性。尤为关键的是，左、右、前、后四个方向压料模组的协同布局，构成了对产品四周的全面包围式压紧保护。特别是右压料模组和前压料模组采用伺服驱动，实现了压紧力的数字化精确控制和压臂位置的高精度调节。使得该载台能够灵活适应不同长度和宽度尺寸的玻璃基板，仅需通过程序即可快速切换压紧位置，实现了真正意义上的多尺寸兼容，显著提升了设备的柔性化生产能力，减少了因产品规格变更所需的硬件调整或更换时间，有效降低了使用成本。本实用新型将真空吸附、机械定位与伺服驱动的柔性压紧有机结合，共同作用，达到了高精度定位、可靠固定、高效适应多规格产品及保护产品表面的综合有益效果，特别适用于对洁净度、定位精度和生产柔性要求较高的平板显示、半导体等行业。
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Figure CN224659256U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of glass substrate preparation technology, and in particular to a vacuum adsorption stage compatible with multiple sizes. Background Technology
[0002] In modern precision manufacturing fields, such as flat panel displays and semiconductor packaging, it is often necessary to process or inspect thin, brittle, and high-precision products with high surface finish requirements, such as glass substrates and silicon wafers. These processes typically require a stage capable of rapid, precise positioning and reliable fixation of the workpiece, while simultaneously preventing scratches or indentations on the workpiece surface due to improper fixing methods. Traditional stages often employ rigid clamping methods such as mechanical clamps or bolt plates, which not only easily leave indentations on the workpiece edges, affecting product quality, but also involve cumbersome adjustments, making it difficult to quickly adapt to the production needs of products with different sizes and specifications, thus limiting the flexibility of the production line.
[0003] To protect workpiece surfaces, vacuum adsorption technology has been introduced. However, conventional vacuum adsorption stages exhibit several limitations when dealing with products of varying sizes. First, for small products, continuously evacuating the entire adsorption stage surface results in significant energy waste and creates ineffective adsorption zones around the small workpiece, affecting positioning accuracy and fixation reliability. Second, single vacuum adsorption may lack sufficient fixation reliability when the workpiece is subjected to lateral or centrifugal forces, posing a risk of workpiece displacement. Furthermore, existing stage positioning methods often rely on manual alignment or simple mechanical stops, resulting in low accuracy and efficiency, making it difficult to meet the requirements of high-cycle, high-precision automated production. Especially when product specifications change frequently, traditional stages lack the ability to quickly and accurately adjust the clamping position, typically requiring manual replacement or adjustment of hardware, severely impacting equipment production efficiency and adaptability.
[0004] Therefore, the industry urgently needs a vacuum adsorption stage solution that can be compatible with multiple sizes, achieve high-precision positioning and reliable non-destructive fixation, and has a high degree of automation and flexibility. Utility Model Content
[0005] To solve the above problems, this utility model organically combines vacuum adsorption, mechanical positioning, and servo-driven flexible clamping. Through their combined action, it achieves a comprehensive and beneficial effect of high-precision positioning, reliable fixation, efficient adaptation to multiple product specifications, and protection of product surfaces, making it compatible with multiple sizes of vacuum adsorption platforms.
[0006] The technical solution adopted by this utility model is as follows: a vacuum adsorption platform compatible with multiple sizes and specifications, including a rotary drive module, a placement worktable, a left pressing module, a right pressing module, a front pressing module, and a rear pressing module. The placement worktable is set on the rotary drive module and has adsorption holes for adsorbing and fixing the product. An end positioning block is set on one side of the placement worktable, and the end positioning block forms a right-angle positioning groove at one end of the placement worktable for positioning the end of the product. The left pressing module, the right pressing module, the front pressing module, and the rear pressing module are respectively set around the worktable and are used to press and fix the product around the placement worktable.
[0007] A further improvement to the above solution is that the rotary drive module includes a rotary base, a DD motor, and a rotary drive frame. The DD motor is mounted on the rotary base, the rotary drive frame is mounted on the DD motor, and the placement worktable is mounted on the rotary drive frame. A cavity is formed between the rotary drive frame and the placement worktable, and the front pressing module and the rear pressing module are respectively mounted on both sides of the cavity.
[0008] A further improvement to the above solution is that a vacuum adsorption stage is provided on the placement workbench, the adsorption holes are provided on the vacuum adsorption stage, and a vacuum separation groove is provided on the vacuum adsorption stage to separate the large product area and the small product area of the vacuum adsorption stage.
[0009] A further improvement to the above solution is that the left pressing module includes a left pressing bracket, a left pressing push assembly, a left pressing drive assembly, and a left pressing plate. The left pressing bracket is located on the left side of the workbench and close to the end positioning block. The left pressing push assembly is mounted on the left pressing bracket. The left pressing drive assembly is mounted on the left pressing push assembly. The left pressing plate is mounted on the left pressing drive assembly.
[0010] A further improvement to the above solution is that the rear pressing module includes a rear pressing bracket, a rear pressing push assembly, a rear pressing drive assembly, and a rear pressing plate. The rear pressing bracket is located on the rear side of the placement workbench and close to the end positioning block. The rear pressing push assembly is mounted on the rear pressing bracket. The rear pressing drive assembly is mounted on the rear pressing push assembly. The rear pressing plate is mounted on the rear pressing drive assembly.
[0011] A further improvement to the above scheme is that both the left pressing and pushing assembly and the rear pressing and pushing assembly are composed of cylinders and guide rails, and both the left pressing and driving assembly and the rear pressing and driving assembly are cylinders.
[0012] A further improvement to the above solution is that the right pressing module includes a right pressing bracket, a right pressing push assembly, a right pressing drive assembly, and a right pressing plate. The right pressing bracket is located on the right side of the placement workbench and close to the end positioning block. The right pressing push assembly is mounted on the right pressing bracket, the right pressing drive assembly is mounted on the right pressing push assembly, and the right pressing plate is mounted on the right pressing drive assembly.
[0013] A further improvement to the above solution is that the front pressing module includes a front pressing bracket, a front pressing push assembly, a front pressing drive assembly, and a front pressing plate. The front pressing bracket is located on the front side of the placement worktable and close to the end positioning block. The front pressing push assembly is mounted on the front pressing bracket. The front pressing drive assembly is mounted on the front pressing push assembly. The front pressing plate is mounted on the front pressing drive assembly.
[0014] A further improvement to the above scheme is that both the right pressing and pushing assembly and the front pressing and pushing assembly are composed of a servo motor, a lead screw and a guide rail, and both the right pressing and driving assembly and the front pressing and driving assembly are cylinders.
[0015] A further improvement to the above scheme is that the lengths of the right pressure plate and the front pressure plate extend to the inside of the workbench.
[0016] The beneficial effects of this utility model are:
[0017] Compared to existing vacuum stages, this invention achieves non-contact active adsorption and fixation of products by setting adsorption holes on the placement worktable and cooperating with a vacuum system. It can evenly distribute adsorption force, effectively avoiding surface indentations or damage that may be caused by traditional mechanical clamping, making it particularly suitable for precision products with high surface finish requirements, such as glass substrates. The adsorption and fixation response is rapid, improving loading and unloading efficiency. An end positioning block is set on one side of the placement worktable, forming a right-angle positioning groove that provides a fast and accurate initial positioning reference for the product. This design greatly simplifies the alignment operation during loading, reduces operational difficulty and the skill requirements for operators, and helps improve production cycle time and positioning consistency. Crucially, the coordinated layout of the left, right, front, and rear pressure modules constitutes a comprehensive, all-around enveloping pressure protection for the product. In particular, the right and front pressure modules use servo drives, achieving digital and precise control of the pressure force and high-precision adjustment of the pressure arm position. This platform allows for flexible adaptation to glass substrates of varying lengths and widths, enabling rapid switching of clamping positions via a simple program. It achieves true multi-size compatibility, significantly enhancing the equipment's flexible production capabilities, reducing hardware adjustments or replacements required due to product specification changes, and effectively lowering operating costs. This invention organically combines vacuum adsorption, mechanical positioning, and servo-driven flexible clamping, working together to achieve a comprehensive range of beneficial effects, including high-precision positioning, reliable fixation, efficient adaptation to multiple product specifications, and protection of product surfaces. It is particularly suitable for industries with high requirements for cleanliness, positioning accuracy, and production flexibility, such as flat panel displays and semiconductors. Attached Figure Description
[0018] Figure 1 This is a three-dimensional schematic diagram of a vacuum adsorption stage compatible with multiple sizes and specifications according to this utility model;
[0019] Figure 2 for Figure 1 A three-dimensional schematic diagram from another perspective of a vacuum adsorption stage that is compatible with multiple sizes;
[0020] Figure 3 for Figure 1 An exploded view of a vacuum adsorption stage compatible with multiple sizes;
[0021] Figure 4 for Figure 1 An exploded view from another perspective of a vacuum adsorption stage that is compatible with multiple sizes.
[0022] Explanation of reference numerals in the attached drawings: Rotary drive module 1, Rotary base 11, DD motor 12, Rotary drive frame 13, Placement worktable 2, Adsorption hole 21, End positioning block 22, Vacuum adsorption stage 23, Vacuum separation groove 24, Left pressing module 3, Left pressing bracket 31, Left pressing push assembly 32, Left pressing drive assembly 33, Left pressing plate 34, Right pressing module 4, Right pressing bracket 41, Right pressing push assembly 42, Right pressing drive assembly 43, Right pressing plate 44, Front pressing module 5, Front pressing bracket 51, Front pressing push assembly 52, Front pressing drive assembly 53, Front pressing plate 54, Rear pressing module 6, Rear pressing bracket 61, Rear pressing push assembly 62, Rear pressing drive assembly 63, Rear pressing plate 64. Detailed Implementation
[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.
[0024] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.
[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-4As shown, in one embodiment of this utility model, a vacuum adsorption platform compatible with multiple sizes is provided, including a rotary drive module 1, a placement worktable 2, a left pressure module 3, a right pressure module 4, a front pressure module 5, and a rear pressure module 6. The placement worktable 2 is mounted on the rotary drive module 1 and has adsorption holes 21 for product adsorption and fixation. An end positioning block 22 is provided on one side of the placement worktable 2, forming a right-angle positioning groove at one end of the placement worktable 2 for positioning the end of the product. The left pressure module 3, right pressure module 4, front pressure module 5, and rear pressure module 6 are respectively arranged around the worktable and are used to press and fix the product around the worktable 2. This embodiment achieves non-contact active adsorption and fixation of the product by setting adsorption holes 21 on the placement worktable 2 and cooperating with a vacuum system. It can evenly distribute the adsorption force and effectively avoid the surface indentation or damage that may be caused by traditional mechanical clamping, and is particularly suitable for precision products with high surface finish requirements such as glass substrates. The adsorption and fixation response is rapid, improving loading and unloading efficiency. An end positioning block 22 is installed on one side of the worktable 2, forming a right-angle positioning groove that provides a fast and accurate initial positioning reference for the product. This design greatly simplifies the alignment operation during loading, reduces operational difficulty and the skill requirements for operators, and helps improve production cycle time and positioning consistency. Crucially, the coordinated layout of the left, right, front, and rear pressing modules constitutes a comprehensive, all-around clamping protection for the product. In particular, the right pressing module 4 and the front pressing module 5 are servo-driven, achieving precise digital control of the clamping force and high-precision adjustment of the pressing arm position. This allows the platform to flexibly adapt to glass substrates of different lengths and widths, and the clamping position can be quickly switched via a program, achieving true multi-size compatibility. This significantly improves the equipment's flexible production capabilities, reduces the time required for hardware adjustments or replacements due to product specification changes, and effectively reduces operating costs. This embodiment organically combines vacuum adsorption, mechanical positioning, and servo-driven flexible clamping. The combined effect achieves comprehensive benefits such as high-precision positioning, reliable fixation, efficient adaptation to multiple product specifications, and protection of product surfaces. It is particularly suitable for industries with high requirements for cleanliness, positioning accuracy, and production flexibility, such as flat panel displays and semiconductors.
[0026] The rotary drive module 1 includes a rotary base 11, a DD motor 12, and a rotary drive frame 13. The DD motor 12 is mounted on the rotary base 11, the rotary drive frame 13 is mounted on the DD motor 12, and the placement table 2 is mounted on the rotary drive frame 13. A cavity is formed between the rotary drive frame 13 and the placement table 2. The front pressing module 5 and the rear pressing module 6 are respectively located on both sides of the cavity. In this embodiment, by sequentially integrating the rotary base 11, the high-precision DD motor 12, and the rotary drive frame 13, a stable and precise rotary drive foundation is provided for the placement table 2. The DD motor 12, with its high torque, direct drive, and backlash-free characteristics, ensures that the placement table 2 can achieve precise angular indexing and smooth rotational movement. The cavity structure formed between the rotary drive frame 13 and the placement table 2 cleverly provides valuable space for the installation of the front pressing module 5 and the rear pressing module 6. By setting these two pressing modules on both sides of the cavity, a compact and integrated module layout is achieved. By avoiding placing the pressing mechanism externally or superimposing it on the rotating mechanism, the overall peripheral dimensions and structural height of the platform are effectively reduced, lowering the space occupancy rate of the equipment. Furthermore, this ensures that the rotating drive module 1 and the pressing module do not interfere with each other functionally. When the worktable 2 rotates, the pressing module beneath it remains stationary and operates normally, thus ensuring that the pressing function remains stable and reliable while the equipment performs rotational movements. This significantly improves the space utilization efficiency and motion coordination of the equipment.
[0027] A vacuum adsorption stage 23 is provided on the workbench 2. Adsorption holes 21 are located on the vacuum adsorption stage 23, which is equipped with a vacuum partition groove 24 to separate a large product area and a small product area. In this embodiment, by creating the vacuum partition groove 24 on the surface of the vacuum adsorption stage 23, it is physically divided into two relatively independent adsorption areas: a large product area and a small product area. When carrying products with a large area, the vacuum system can simultaneously evacuate both the large and small product areas, providing sufficient total adsorption force to ensure the stable fixation of large products. When adsorbing smaller products, the operator or control system can choose to evacuate only the local area containing the small product. When only small products need to be adsorbed, there is no need to evacuate large, ineffective areas, avoiding energy waste and conforming to the concept of green manufacturing. Partitioned adsorption can quickly establish a stronger vacuum within the effective adsorption area, improving the response speed and fixation reliability of small-sized products.
[0028] The left pressing module 3 includes a left pressing bracket 31, a left pressing push assembly 32, a left pressing drive assembly 33, and a left pressing plate 34. The left pressing bracket 31 is located on the left side of the placement worktable 2 and near the end positioning block 22. The left pressing push assembly 32 is mounted on the left pressing bracket 31, the left pressing drive assembly 33 is mounted on the left pressing push assembly 32, and the left pressing plate 34 is mounted on the left pressing drive assembly 33. The rear pressing module 6 includes a rear pressing bracket 61, a rear pressing push assembly 62, a rear pressing drive assembly 63, and a rear pressing plate 64. The rear pressing bracket 61 is located on the rear side of the placement worktable 2 and near the end positioning block 22. The rear pressing push assembly 62 is mounted on the rear pressing bracket 61, the rear pressing drive assembly 63 is mounted on the rear pressing push assembly 62, and the rear pressing plate 64 is mounted on the rear pressing drive assembly 63. Both the left pressing and pushing assembly 32 and the rear pressing and pushing assembly 62 are composed of cylinders and guide rails, and both the left pressing and driving assembly 33 and the rear pressing and driving assembly 63 are cylinders. In this embodiment, both modules are installed and positioned using independent pressing brackets, ensuring that the entire module is fixed on the side and rear of the worktable 2. Based on this, the pushing assembly composed of cylinders and guide rails undertakes the large-stroke coarse positioning function of the module. When it is necessary to adapt to products of different sizes, the pushing assembly can drive the entire subsequent assembly (including the driving assembly and the pressing plate) to slide along the guide rail and quickly move to the preset work position that roughly corresponds to the edge of the product, realizing the initial and rapid adjustment of the pressing point. Next, the cylinder, as the driving assembly, is responsible for performing precise pressing action. As a driving element, the cylinder has the advantages of simple structure, rapid action, strong power and low cost, and can provide stable and reliable linear pressing force, ensuring that the pressing plate firmly presses the left and rear edges of the product onto the surface of the vacuum adsorption table 23.
[0029] The right pressure module 4 includes a right pressure bracket 41, a right pressure pushing assembly 42, a right pressure driving assembly 43, and a right pressure plate 44. The right pressure bracket 41 is located on the right side of the workbench 2 and near the end positioning block 22. The right pressure pushing assembly 42 is mounted on the right pressure bracket 41, the right pressure driving assembly 43 is mounted on the right pressure pushing assembly 42, and the right pressure plate 44 is mounted on the right pressure driving assembly 43. The front pressure module 5 includes a front pressure bracket 51, a front pressure pushing assembly 52, a front pressure driving assembly 53, and a front pressure plate 54. The front pressure bracket 51 is located on the front side of the workbench 2 and near the end positioning block 22. The front pressure pushing assembly 52 is mounted on the front pressure bracket 51, the front pressure driving assembly 53 is mounted on the front pressure pushing assembly 52, and the front pressure plate 54 is mounted on the front pressure driving assembly 53. Both the right pressure feeding assembly 42 and the front pressure feeding assembly 52 are composed of servo motors, lead screws, and guide rails, while both the right pressure driving assembly 43 and the front pressure driving assembly 53 are cylinders. The lengths of the right pressure plate 44 and the front pressure plate 54 extend to the inner side of the worktable 2. In this embodiment, the right and front pressure modules 5 also adopt a modular hierarchical structure, but their feeding assemblies innovatively use a precision transmission system composed of servo motors, lead screws, and guide rails. This contrasts sharply with the cylinder feeding used in the left and rear modules and achieves a precise division of functions. The servo motor drive combined with the high-precision lead screw enables precise digital control of the feeding displacement. When the processing object changes, the control system can instruct the servo motor to drive the entire module to a precise preset position according to the preset product size parameters. Its positioning accuracy is much higher than the coarse positioning of the cylinder drive. It is suitable for precision machining scenarios with extremely high requirements for the positioning accuracy of the right and front edges of the product, ensuring the accuracy of the pressure force application point and effectively avoiding workpiece displacement or deformation caused by pressure deviation. After precise positioning, the drive assembly, composed of cylinders, performs the final clamping action. The cylinders' rapid response and stable force ensure the immediacy and reliability of the clamping action. This combination of "servo precision positioning + cylinder stable clamping" balances high precision and high reliability, optimizing system performance and cost. The lengths of the right pressure plate 44 and the front pressure plate 54 are specially designed to extend to the inside of the worktable 2. This allows the two pressure plates to cover a wider area from the edge to the center of the worktable. The technical effect is that it greatly enhances the clamping compatibility for small and medium-sized products. For smaller products, when they are attracted and pressed against the end positioning block 22, their right and front edges may be located inwards on the worktable surface.
[0030] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A vacuum adsorption stage compatible with multiple sizes, characterized in that: The device includes a rotary drive module, a placement worktable, a left pressing module, a right pressing module, a front pressing module, and a rear pressing module. The placement worktable is mounted on the rotary drive module and has suction holes for product adsorption and fixation. An end positioning block is provided on one side of the placement worktable, forming a right-angle positioning groove at one end of the worktable for positioning the end of the product. The left pressing module, right pressing module, front pressing module, and rear pressing module are respectively arranged around the worktable and are used to press and fix the product around the worktable.
2. The vacuum adsorption stage compatible with multiple sizes according to claim 1, characterized in that: The rotary drive module includes a rotary base, a DD motor, and a rotary drive frame. The DD motor is mounted on the rotary base, the rotary drive frame is mounted on the DD motor, and the placement worktable is mounted on the rotary drive frame. A cavity is formed between the rotary drive frame and the placement worktable, and the front pressing module and the rear pressing module are respectively mounted on both sides of the cavity.
3. The vacuum adsorption stage compatible with multiple sizes according to claim 1, characterized in that: The placement workbench is equipped with a vacuum adsorption stage, the adsorption holes are located on the vacuum adsorption stage, and the vacuum adsorption stage is equipped with a vacuum separation groove to separate the large product area and the small product area of the vacuum adsorption stage.
4. The vacuum adsorption stage compatible with multiple sizes according to claim 1, characterized in that: The left pressing module includes a left pressing bracket, a left pressing push assembly, a left pressing drive assembly, and a left pressing plate. The left pressing bracket is located on the left side of the workbench and close to the end positioning block. The left pressing push assembly is mounted on the left pressing bracket. The left pressing drive assembly is mounted on the left pressing push assembly. The left pressing plate is mounted on the left pressing drive assembly.
5. The vacuum adsorption stage compatible with multiple sizes according to claim 4, characterized in that: The rear pressing module includes a rear pressing bracket, a rear pressing push assembly, a rear pressing drive assembly, and a rear pressing plate. The rear pressing bracket is located on the rear side of the placement workbench and near the end positioning block. The rear pressing push assembly is mounted on the rear pressing bracket. The rear pressing drive assembly is mounted on the rear pressing push assembly. The rear pressing plate is mounted on the rear pressing drive assembly.
6. The vacuum adsorption stage compatible with multiple sizes according to claim 5, characterized in that: Both the left pressing and pushing assembly and the rear pressing and pushing assembly are composed of cylinders and guide rails, and both the left pressing and driving assembly and the rear pressing and driving assembly are cylinders.
7. The vacuum adsorption stage compatible with multiple sizes according to claim 1, characterized in that: The right pressing module includes a right pressing bracket, a right pressing push assembly, a right pressing drive assembly, and a right pressing plate. The right pressing bracket is located on the right side of the workbench and close to the end positioning block. The right pressing push assembly is mounted on the right pressing bracket. The right pressing drive assembly is mounted on the right pressing push assembly. The right pressing plate is mounted on the right pressing drive assembly.
8. The vacuum adsorption stage compatible with multiple sizes according to claim 7, characterized in that: The front pressing module includes a front pressing bracket, a front pressing push assembly, a front pressing drive assembly, and a front pressing plate. The front pressing bracket is located on the front side of the worktable and close to the end positioning block. The front pressing push assembly is mounted on the front pressing bracket. The front pressing drive assembly is mounted on the front pressing push assembly. The front pressing plate is mounted on the front pressing drive assembly.
9. The vacuum adsorption stage compatible with multiple sizes according to claim 8, characterized in that: Both the right pressing and pushing assembly and the front pressing and pushing assembly are composed of a servo motor, a lead screw and a guide rail, and both the right pressing and driving assembly and the front pressing and driving assembly are cylinders.
10. The multi-size compatible vacuum adsorption stage according to claim 9, characterized in that: The lengths of the right pressure plate and the front pressure plate extend to the inside of the workbench.