Switch door mechanism of linear guide rail grinding machine

Abstract

The application provides a door opening and closing mechanism of a linear guide rail grinding machine, and belongs to the technical field of grinding machine equipment. It solves the technical problem of large space occupation in the prior art. The door opening and closing mechanism of the linear guide rail grinding machine comprises a first door plate, one side of the first door plate is provided with a second door plate with an L-shaped cross section, the inner side of the first door plate is adjacent to the inner side of the second door plate but not in contact and is connected through a first anti-splashing assembly, a second anti-splashing assembly is arranged between the periphery of the first door plate and the second door plate and a door frame, the first door plate and the second door plate are connected with at least one door opening and closing driving mechanism, the door opening and closing driving mechanism is used for driving the first door plate and the second door plate to move synchronously along the radial direction of a workbench to realize door opening and closing. When the first door plate and the second door plate are opened, the lower end can rotate around the upper end to realize superposition after the door is opened. The application has the advantages of good protection effect, long service life, small space occupation and the like.

Description

Technical Field

[0001] This invention belongs to the technical field of grinding machine processing equipment, and in particular relates to a door opening and closing mechanism for a linear guide grinding machine. Background Technology

[0002] Linear grinders are machine tools widely used in precision grinding processes, playing an important role in machinery manufacturing, mold making, and other fields. During the grinding process, a large amount of metal chips, abrasive particles, and coolant splashes are generated. If these splashes escape from the gaps, they can not only pollute the working environment but also pose a threat to the safety of operators.

[0003] In current technologies, there are usually gaps between door panels, allowing debris to easily penetrate and resulting in inadequate splash prevention. Furthermore, the sealing effect largely relies on rigid contact, which is prone to wear and deformation over time, leading to seal failure.

[0004] While an integrated door panel design can mitigate the splashing problem by reducing the mating clearance, it also results in a large footprint and a small opening angle, still affecting the grinding machine's performance. Therefore, a door opening and closing mechanism that is easy to open and close and solves the aforementioned problems is needed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a door opening and closing mechanism for a linear guideway grinding machine that is easy to open and close and has better anti-splash performance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The door opening and closing mechanism of this linear guide grinding machine includes a first door panel. A second door panel with an L-shaped cross-section is provided on one side of the first door panel. The inner sides of the first and second door panels are adjacent to but not in contact with each other and are connected by a first anti-splash assembly. A second anti-splash assembly is provided between the outer peripheries of the first and second door panels and the door frame. The first and second door panels are connected to at least one door opening and closing drive mechanism. The door opening and closing drive mechanism is used to drive the first and second door panels to move synchronously along the radial direction of the worktable to realize door opening and closing. Furthermore, when the first and second door panels open, their lower ends can rotate around their upper ends, thus achieving overlap after opening.

[0007] By installing a first anti-splash component between the inner sides of the first and second door panels, a movable gap is created between the two panels to allow for relative movement, thus improving the flexibility of door opening and closing. This ensures freedom of movement while preventing splashes from escaping between the two door panels. Furthermore, the second anti-splash component blocks particles flying from the gaps between the door panel edges and the door frame; combined, these two aspects further enhance sealing reliability.

[0008] In the aforementioned door opening and closing mechanism of the linear guide grinding machine, the first anti-splash component includes a strip-shaped anti-splash blocking plate. The width of the anti-splash blocking plate is greater than the movable gap between the inner sides of the first door panel and the second door panel. At least one side of the anti-splash blocking plate is fixed to either the first or second door panel. The width of the anti-splash blocking plate is greater than the movable gap, ensuring that even if the two door panels move relative to each other during operation, causing a change in the gap width, the blocking plate always completely covers the movable gap. This prevents splashes from penetrating the gap and ensures a sealing effect.

[0009] In the opening and closing mechanism of the linear guide grinding machine described above, the second anti-splash component includes rigid sheet-like sealing strips respectively disposed at both ends of the door frame, and a step is formed between the rigid sheet-like sealing strips and the door frame, and the bottom surfaces of the ends of the first door panel and the second door panel can abut against the step; Both the first and second door panels are equipped with flexible sealing strips fixed to their outer sides by a detachable structure. The bottom surface of the door panel end abuts against the step, providing a stable mechanical positioning for the closed position of the door panel and laying the foundation for subsequent sealing. The flexible sealing strip can fill minor unevenness and gaps, effectively blocking fine dust and liquid mist. Furthermore, it can absorb vibrations during equipment operation, ensuring the continued effectiveness of the seal.

[0010] In the opening and closing mechanism of the linear guide grinding machine described above, the flexible sealing strip is of the slot type, and slots are provided on the outer sides of both the first door panel and the second door panel. Alternatively, both the first and second door panels are equipped with sealing strips on their outer sides. In environments with vibration and oil contamination, traditional adhesive methods are prone to failure; mechanical fixing methods offer vibration resistance, oil resistance, and a more reliable and durable connection.

[0011] In the aforementioned door opening and closing mechanism of the linear guide grinding machine, V-shaped anti-collision plates are provided on the inner sides of both the first and second door panels. When the first and second door panels are closed, the fixed sides of the two anti-collision plates are arranged in a V-shape, with the width of the fixed side being greater than the width of the anti-collision side. The V-shaped structure itself has excellent energy dispersion characteristics. When the door panels are closed, the impact force is dispersed and transmitted along the anti-collision plates, effectively absorbing and buffering the impact, protecting the drive mechanism and the door panels themselves. Furthermore, the width of the fixed side of the anti-collision plate being greater than the width of the anti-collision side allows it to provide support when the door panels are closed, preventing the two door panels from colliding with each other.

[0012] In the opening and closing mechanism of the linear guide grinding machine described above, the first door panel includes a first outer panel and a first inner panel. A number of first support ribs are arranged longitudinally and transversely between the first outer panel and the first inner panel. The first support ribs are integrated with the inner wall of the first outer panel. The first inner panel is fixed to the first support ribs by a number of bolts. A number of first observation ports are provided through the first outer panel, the first inner panel and the first support ribs. The first door panel includes a second outer panel and a second inner panel. A plurality of longitudinally and transversely distributed second support ribs are provided between the second outer panel and the second inner panel. These second support ribs are integrally connected to the inner wall of the second outer panel. The second inner panel is fixed to the second support ribs by a plurality of bolts. A plurality of second observation openings are provided passing through the second outer panel, the second inner panel, and the second support ribs. By arranging reinforcing ribs in key areas, a lighter structure than a solid door panel can be made while maintaining the same strength. This helps improve response speed, reduce energy consumption, and reduce wear on hinges and drive components. Furthermore, the longitudinally and transversely distributed support ribs, integrally connected to the inner wall of the outer panel, form a robust grid-like reinforcement structure, enhancing the door panel's resistance to bending and torsion.

[0013] In the aforementioned door opening and closing mechanism of the linear guide grinding machine, the door opening and closing drive mechanism includes a first swing arm mounted on the outer wall of the first door panel. The lower end of the first swing arm is hinged to a first extended hinge seat on the swing arm base, and the upper end of the first swing arm is hinged between the two ends of a second swing arm. One end of the second swing arm is fixed to the second door panel, and the other end of the second swing arm is hinged to the upper end of a third swing arm. The lower end of the third swing arm is hinged to the swing arm base and offset from the hinge center of the lower end of the first swing arm. A swing driver is connected between the two ends of the third swing arm. By sequentially hinged the first, second, and third swing arms and offsetting the hinge points of the bases of the first and third swing arms, a planar linkage system with controlled degrees of freedom is formed. This allows for a movement trajectory of first moving outward and then translating, folding and unfolding during the opening and closing process. This saves space during the opening and closing process. Furthermore, with the same swing arm swing angle, the mechanism can achieve a larger passage opening.

[0014] In the opening and closing mechanism of the linear guide grinding machine described above, the cross-section of the third swing arm is U-shaped, and a reinforcing rib is provided on the opening side of the third swing arm. The reinforcing rib includes two symmetrically arranged trapezoidal plates, and the two trapezoidal plates are respectively connected to the third swing arm. A first hinge hole is provided on the two trapezoidal plates. A first reinforcing plate for reinforcing the two trapezoidal plates is provided on one side of the two trapezoidal plates, and a second reinforcing plate is provided on the other side. The second reinforcing plate is located between the first hinge hole and the lower end of the first swing arm and is connected to the third swing arm and can be used for swing limit. V-shaped reinforcing plates are also provided on both sides of the first swing arm. The swing actuator includes a linear actuator, one end of which is hinged to the swing arm base, and the other end is hinged to the first hinge hole. The U-shaped cross-section itself is a highly efficient bending-resistant structure. Two trapezoidal plates are used to close the open side, forming a closed cross-section, achieving a balance between lightweight and high strength. The second reinforcing plate serves as both a structural reinforcement, connecting the lower parts of the two trapezoidal plates and increasing overall integrity; it also functions as a mechanical limiting component, restricting the swing arm when it swings to a specific position to prevent excessive rotation.

[0015] In the door opening and closing mechanism of the aforementioned linear guide grinding machine, the length of the third swing arm is greater than that of the first and second swing arms. A hinge seat is provided on the swing arm base, and the lower end of the third swing arm is hinged to the hinge seat. An extended hinge connector is provided at a location offset from the hinge center of the hinge seat, and the lower part of the third swing arm is hinged to the extended hinge connector. The fulcrum of the first and third swing arms is concentrated on a single integral component, ensuring that the weight of the door panel, the driving force, and the inertial force acting on the entire linkage system ultimately converge on the swing arm base. This centralized design avoids the risk of torsional deformation caused by the dispersion of force points in the base structure, thus improving the system's motion stability and service life.

[0016] In the door opening and closing mechanism of the aforementioned linear guide grinding machine, an elastic auxiliary reset component is provided between the third swing arm and the second swing arm to assist in closing the door. The elastic auxiliary reset component provides a certain degree of buffering and balancing, making the entire door opening and closing process smoother and more fluid, and reducing vibration.

[0017] Compared with existing technologies, the advantages of the door opening and closing mechanism of this linear guide grinding machine are: 1. Multiple anti-splash components provide excellent anti-splash performance. 2. An elastic sealing structure ensures a long service life. 3. A multi-link composite drive mechanism optimizes the door opening trajectory and minimizes space occupation. 4. An impact-absorbing structure design ensures smooth operation. 5. A composite structure design of hollow door panel and reinforcing ribs ensures high rigidity while maintaining a lightweight overall design. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure provided by the present invention.

[0019] Figure 2 This is a front view structural diagram provided by the present invention.

[0020] Figure 3 This is a side view structural diagram provided by the present invention.

[0021] Figure 4 This is a top view structural diagram provided by the present invention.

[0022] Figure 5This invention provides Figure 4 Schematic diagram of the cross-sectional structure at point AA.

[0023] Figure 6 This invention provides Figure 5 Enlarged structural diagram at point B.

[0024] Figure 7 This is a schematic diagram of the door opening and closing drive mechanism provided by the present invention.

[0025] Figure 8 This is a schematic diagram of the back structure of the door opening and closing drive mechanism provided by the present invention.

[0026] Figure 9 This is a schematic diagram of the internal structure of the bottom surface of the door panel provided by the present invention.

[0027] In the diagram, the components are: first door panel 1, first outer panel 11, first inner panel 12, first support rib 13, first observation port 14, first door panel bolt hole 15; second door panel 2, second outer panel 21, second inner panel 22, second support rib 23, second observation port 24, second door panel top plate 25, second door panel side plate 26, second door panel bolt hole 27, first anti-splash assembly 3, anti-splash blocking plate 31, movable gap 32, anti-collision plate 33, door frame 4, step 41, second anti-splash assembly 5, rigid sheet seal 51, flexible sealing strip 52, slot 53, sealing strip retainer 54, door opening and closing drive mechanism 6, first swing arm 61, first door panel connecting seat 611, first bolt hole 612, and so on. Second swing arm 62, extension arm 621, second bolt hole 622, third swing arm 63, reinforcing rib 631, trapezoidal plate 632, first hinge hole 633, first reinforcing plate 634, second reinforcing plate 635, V-shaped reinforcing plate 636, second hinge hole 637, swing arm base 64, first extended hinge seat 641, hinge seat 642, extended hinge connector 643, hinge seat reinforcing rib 644, swing driver 65, linear driver 651, driver connecting seat 652, adjustment plate 653, driver lower hinge seat 654, support plate 655, elastic auxiliary reset assembly 66, elastic auxiliary base plate 661, spring mounting hole 662, reset spring 663, worktable 7. Detailed Implementation

[0028] like Figures 1 to 9As shown, the door opening and closing mechanism of this linear guide grinding machine includes a first door panel 1, a second door panel 2 with an L-shaped cross-section on one side of the first door panel 1, the inner side of the first door panel 1 and the inner side of the second door panel 2 are adjacent but not in contact and are connected by a first anti-splash assembly 3, a second anti-splash assembly 5 is provided between the outer periphery of the first door panel 1 and the second door panel 2 and the door frame 4, and the first door panel 1 and the second door panel 2 are connected to at least one door opening and closing drive mechanism 6. The door opening and closing drive mechanism 6 is used to drive the first door panel 1 and the second door panel 2 to move synchronously along the radial direction of the worktable 7 to realize the opening and closing of the door, and the lower end of the first door panel 1 and the second door panel 2 can rotate around the upper end when the door is opened so that they can overlap after the door is opened.

[0029] In this embodiment, a first anti-splash component 3 is provided between the first door panel 1 and the second door panel 2, and an movable gap 32 is provided between the first door panel 1 and the second door panel 2, allowing the first door panel 1 and the second door panel 2 to rotate relative to each other. During rotation, the first anti-splash component 3 prevents splashes from escaping between the two door panels in real time. A second anti-splash component 5 is also provided to block particles flying out from the gap between the door panel edge and the door frame 4. The combination of these two components ensures the flexibility of the door panel opening and closing while achieving excellent anti-splash performance.

[0030] In this embodiment, the second door panel 2 includes a top panel 25 horizontally positioned at the top and a side panel 26 inclined on the side. The top panel 25 and the side panel 26 are fixedly connected. One side of the splash guard 31 is connected to the inner top of the first door panel 1, and the other side is connected to the inner top of the top of the second door panel 25.

[0031] More specifically, the second splash-proof component 5 includes rigid sheet-like sealing strips 51 respectively disposed at both ends of the door frame 4, forming a step 41 between the rigid sheet-like sealing strips 51 and the door frame 4, and the bottom surfaces of the ends of the first door panel 1 and the second door panel 2 can abut against the step 41; Both the outer sides of the first door panel 1 and the second door panel 2 are provided with flexible sealing strips 52 that are fixed by a detachable structure.

[0032] More specifically, the flexible sealing strip 52 has a slot on one side, with slots 53 on the outer sides of both the first door panel 1 and the second door panel 2, and a sealing strip 54 on the other side.

[0033] like Figure 6 As shown, V-shaped anti-collision plates 33 are provided on the inner side of the first door panel 1 and the inner side of the second door panel 2. When the first door panel 1 and the second door panel 2 are closed, the fixed sides of the two anti-collision plates 33 are distributed in a figure-eight shape. The width of the fixed side of the anti-collision plate 33 is greater than the width of the anti-collision side of the anti-collision plate 33.

[0034] In this embodiment, the second door panel 2 includes a top panel 25 horizontally positioned at the top and a side panel 26 inclined on the side. The top panel 25 and the side panel 26 are fixedly connected. One side of the splash guard 31 is connected to the inner top of the first door panel 1, and the other side is connected to the inner top of the top of the second door panel 25.

[0035] More specifically, the first door panel 1 includes a first outer panel 11 and a first inner panel 12. A number of longitudinally and transversely distributed first support ribs 13 are provided between the first outer panel 11 and the first inner panel 12. The first support ribs 13 are integrated with the inner wall of the first outer panel 11. The first inner panel 12 is fixed to the first support ribs 13 by a number of bolts. Four first observation ports 14 are provided through the first outer panel 11, the first inner panel 12 and the first support ribs 13. The second door panel 2 includes a second outer panel 21 and a second inner panel 22. Several longitudinally and transversely distributed second support ribs 23 are provided between the second outer panel 21 and the second inner panel 22. The second support ribs 23 are integrated with the inner wall of the second outer panel 21. The second inner panel 22 is fixed to the second support ribs 23 by several bolts. Four second observation ports 24 are provided through the second outer panel 21, the second inner panel 22 and the second support ribs 23.

[0036] In this embodiment, the first observation port 14 and the second observation port 24 are respectively spaced apart along the length direction of the first door panel 1 and the second door panel side panel 26.

[0037] More specifically, the door opening and closing drive mechanism 6 includes a first swing arm 61 disposed on the outer wall of the first door panel 1. The lower end of the first swing arm 61 is hinged to the first extended hinge seat 641 of the swing arm base 64. The upper end of the first swing arm 61 is hinged between the two ends of the second swing arm 62. One end of the second swing arm 62 is fixed to the second door panel 2. The other end of the second swing arm 62 is hinged to the upper end of the third swing arm 63. The lower end of the third swing arm 63 is hinged to the swing arm base 64 and is offset from the hinge center of the lower end of the first swing arm 61. A swing driver 65 is connected between the two ends of the third swing arm 63.

[0038] In this embodiment, a first door panel connecting seat 611 is provided on the side of the first swing arm 61 away from the third swing arm 63. A plurality of first bolt holes 612 are provided on the first door panel connecting seat 611, and the first bolt holes 612 radially penetrate the first swing arm 61. A first door panel bolt hole 15 is provided at a corresponding position on the first door panel 1. The first swing arm 61 and the first door panel 1 are connected together by bolts passing through the first bolt holes 612 and the first door panel bolt holes 15. An extension arm 621 is provided at one end of the second swing arm 62 and the third swing arm 63, and a number of second bolt holes 622 are provided on the extension arm 621. The extension arm 621 is integrated with the second swing arm 62. The second door panel 2 is provided with second door panel bolt holes 27 at corresponding positions. The second swing arm 62 and the second door panel 2 are connected together by bolts passing through the second bolt holes 622 and the second door panel bolt holes 27. The first swing arm 61, the second swing arm 62 and the third swing arm 63 are all hollow tube structures.

[0039] In this embodiment, a hinge seat reinforcing rib 644 is provided between the lower end of the first extended hinge seat 641 and the swing arm base 64, and the first extended hinge seat 641, the swing arm base 64 and the hinge seat reinforcing rib 644 are connected as one unit.

[0040] More specifically, the cross-section of the third swing arm 63 is U-shaped. A reinforcing rib 631 is provided on the open side of the third swing arm 63. The reinforcing rib 631 includes two symmetrically arranged trapezoidal plates 632, and the two trapezoidal plates 632 are connected to the third swing arm 63 as a whole. A first hinge hole 633 is provided on the two trapezoidal plates 632. A first reinforcing plate 634 for reinforcing the two trapezoidal plates 632 is provided on one side of the two trapezoidal plates 632, and a second reinforcing plate 635 is provided on the other side. The second reinforcing plate 635 is located between the first hinge hole 633 and the lower end of the first swing arm 61 and is connected to the third swing arm 63 and can be used for swing limit. V-shaped reinforcing plates 636 are also provided on both sides of the third swing arm 63. The swing actuator 65 includes a linear actuator 651, one end of which is hinged to the swing arm base 64 and the other end is hinged to the first hinge hole 633.

[0041] In this embodiment, the linear actuator 651 is a cylinder whose extension and retraction are controlled by a motor. A second hinge hole 637 is also provided between the two trapezoidal plates 632.

[0042] like Figure 2 and 3 As shown, the bottom of the swing arm base 64 is provided with a driver connection seat 652. The driver connection seat 652 is connected to the lower hinge seat 654 of the driver through an adjustment plate 653. The inner end of the adjustment plate 653 is connected to the driver connection seat 652, and the bottom of the outer end is provided with a support plate 655. The lower end of the linear driver 651 is hinged to the lower hinge seat 654 of the driver, and the upper end is hinged to the first hinge hole 633.

[0043] More specifically, the length of the third swing arm 63 is greater than the length of the first swing arm 61 and the second swing arm 62 respectively. The swing arm base 64 is provided with a hinge seat 642. The lower end of the third swing arm 63 is hinged to the hinge seat 642. The hinge seat 642 is provided with an extended hinge connector 643 connected to it at a position off the hinge center. The lower end of the first swing arm 61 is hinged to the extended hinge connector 643.

[0044] More specifically, a flexible auxiliary reset assembly 66 for assisting in closing the door is provided between the third swing arm 63 and the second swing arm 62.

[0045] In this embodiment, the elastic auxiliary reset assembly 66 includes an elastic auxiliary base plate 661 disposed on both sides of the hinge joint between the second swing arm 62 and the third swing arm 63. The middle part of the elastic auxiliary base plate 661 is hinged to the second swing arm 62 and the third swing arm 63. One end is connected to the second swing arm 62, and the other end extends out of the end of the second swing arm 62. A spring mounting hole 662 is provided on the other end. A reset spring 663 is provided in the spring mounting hole 662. The other end of the reset spring 663 is connected to the third swing arm 63.

[0046] The working principle of this embodiment is that when the door needs to be opened, the linear actuator 651 of the swing actuator 65 begins to retract. The pulling force of this retraction acts on the first hinge hole 633 at the upper end of the third swing arm 63, thereby pulling the third swing arm 63 to swing outward with its lower hinge point as the center.

[0047] The swing of the third swing arm 63 drives the second swing arm 62 to move through the hinge point between its upper end and the second swing arm 62. Since one end of the second swing arm 62 is fixed to the second door panel 2 by the extension arm 621 and bolts, and the other end is hinged to the upper end of the first swing arm 61, while the lower end of the first swing arm 61 is hinged to the swing arm base 64, a multi-link system is formed.

[0048] Driven by this multi-link system, the first door panel 1 and the second door panel 2 are forced to move synchronously. They follow an optimized trajectory determined by the link size and hinge point position, typically a compound movement of first moving outward to disengage from the sealing strip, and then laterally translating, thereby effectively folding and opening while maximizing space savings.

[0049] During the opening process, the reset spring 663 in the elastic auxiliary reset assembly 66 connected between the third swing arm 63 and the second swing arm 62 will be stretched, which plays a role in assisting the start and buffering, making the operation more stable.

[0050] When the door needs to be closed, the linear actuator 651 reverses its action. It pushes the third swing arm 63 to swing inward, which in turn drives the first door panel 1 and the second door panel 2 to return synchronously along the original trajectory through the multi-link system, thus completing the closing action.

[0051] In the final stage of the closing action, the bottom surfaces of the first door panel 1 and the second door panel 2 precisely abut against the step 41 formed by the rigid sheet-like sealing strip 51 and the door frame 4, achieving precise positioning. At the same time, the flexible sealing strip 52 installed on the outside of the door panel is compressed to fill the gap and form an effective seal.

[0052] Meanwhile, the anti-splash blocking plate 31 of the first anti-splash assembly 3, which is connected between the inner sides of the first door panel 1 and the second door panel 2, can continuously cover the movable gap 32 between the two door panels, preventing splashes from escaping from the joint of the two door panels, thus forming a reliable seal.

[0053] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0054] Although this article extensively uses terms such as first door panel, first outer panel, first inner panel, first support rib, first observation port, first door panel bolt hole, second door panel, second outer panel, second inner panel, second support rib, second observation port, second door panel top panel, second door panel side panel, second door panel bolt hole, first anti-splash assembly, anti-splash barrier, movement gap, door frame, step, second anti-splash assembly, rigid sheet seal, flexible sealing strip, slot, sealing strip clip, door opening and closing drive mechanism, first swing arm, first door panel connecting seat, and first bolt hole The terms used include second swing arm, extension arm, second bolt hole, third swing arm, reinforcing rib, trapezoidal plate, first hinge hole, first reinforcing plate, second reinforcing plate, V-shaped reinforcing plate, second hinge hole, swing arm base, first extended hinge seat, hinge seat, extended hinge connector, hinge seat reinforcing rib, swing actuator, linear actuator, actuator connecting seat, adjusting plate, lower hinge seat of actuator, support plate, elastic auxiliary reset assembly, elastic auxiliary base plate, spring mounting hole, reset spring, worktable, etc., but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention, and interpreting them as any additional limitation would be contrary to the spirit of the invention.

Claims

1. A door opening and closing mechanism for a linear guide grinding machine, characterized in that, The system includes a first door panel (1), and a second door panel (2) with an L-shaped cross-section on one side of the first door panel (1). The inner sides of the first door panel (1) and the inner sides of the second door panel (2) are adjacent but not in contact and are connected by a first anti-splash assembly (3). A second anti-splash assembly (5) is provided between the outer periphery of the first door panel (1) and the second door panel (2) and the door frame (4). The first door panel (1) and the second door panel (2) are connected to at least one door opening and closing drive mechanism (6). The door opening and closing drive mechanism (6) is used to drive the first door panel (1) and the second door panel (2) to move synchronously along the radial direction of the workbench (7) to realize the opening and closing of the door. When the first door panel (1) and the second door panel (2) are opened, they can realize the opening and closing of the door. The upper end rotates around the upper end to achieve overlapping after the door is opened; the door opening and closing drive mechanism (6) includes a first swing arm (61) set on the outer wall of the first door panel (1), the lower end of the first swing arm (61) is hinged to the first extended hinge seat (641) of the swing arm base (64), the upper end of the first swing arm (61) is hinged between the two ends of the second swing arm (62), one end of the second swing arm (62) is fixed on the second door panel (2), the other end of the second swing arm (62) is hinged to the upper end of the third swing arm (63), the lower end of the third swing arm (63) is hinged to the swing arm base (64) and offset from the hinge center of the lower end of the first swing arm (61), and a swing driver (65) is connected between the two ends of the third swing arm (63).

2. The door opening and closing mechanism of the linear guide grinding machine according to claim 1, characterized in that, The first anti-splash assembly (3) includes a strip-shaped anti-splash barrier (31), and the width of the anti-splash barrier (31) is greater than the movable gap (32) between the inner side of the first door panel (1) and the inner side of the second door panel (2). The anti-splash barrier (31) is fixed to the first door panel (1) or the second door panel (2) on at least one side.

3. The door opening and closing mechanism of the linear guide grinding machine according to claim 1, characterized in that, The second anti-splash assembly (5) includes rigid sheet-like seals (51) respectively disposed at both ends of the door frame (4), and a step (41) is formed between the rigid sheet-like seals (51) and the door frame (4), and the bottom surfaces of the ends of the first door panel (1) and the second door panel (2) can abut against the step (41); Both the first door panel (1) and the second door panel (2) are provided with flexible sealing strips (52) fixed by a detachable structure on their outer sides.

4. The door opening and closing mechanism of the linear guide grinding machine according to claim 3, characterized in that, The flexible sealing strip (52) is a slot type, and slots (53) are provided on the outer sides of the first door panel (1) and the second door panel (2); Alternatively, both the first door panel (1) and the second door panel (2) are provided with sealing strips (54) on their outer sides.

5. The door opening and closing mechanism of the linear guide grinding machine according to claim 1, characterized in that, The inner sides of the first door panel (1) and the inner sides of the second door panel (2) are provided with V-shaped anti-collision plates (33). The fixed sides of the two anti-collision plates (33) are arranged in a figure-eight shape when the first door panel (1) and the second door panel (2) are closed. The width of the fixed side of the anti-collision plate (33) is greater than the width of the anti-collision side of the anti-collision plate (33).

6. The door opening and closing mechanism of the linear guide grinding machine according to any one of claims 1-5, characterized in that, The first door panel (1) includes a first outer panel (11) and a first inner panel (12). A plurality of first support ribs (13) are provided between the first outer panel (11) and the first inner panel (12). The first support ribs (13) are integrated with the inner wall of the first outer panel (11). The first inner panel (12) is fixed to the first support ribs (13) by a plurality of bolts. A plurality of first observation ports (14) are provided through the first outer panel (11), the first inner panel (12) and the first support ribs (13). The second door panel (2) includes a second outer panel (21) and a second inner panel (22). A number of second support ribs (23) are arranged longitudinally and transversely between the second outer panel (21) and the second inner panel (22). The second support ribs (23) are integrated with the inner wall of the second outer panel (21). The second inner panel (22) is fixed to the second support ribs (23) by a number of bolts. A number of second observation ports (24) are provided through the second outer panel (21), the second inner panel (22) and the second support ribs (23).

7. The door opening and closing mechanism of the linear guide grinding machine according to claim 1, characterized in that, The cross-section of the third swing arm (63) is U-shaped. A reinforcing rib (631) is provided on the open side of the third swing arm (63). The reinforcing rib (631) includes two symmetrically arranged trapezoidal plates (632), and the two trapezoidal plates (632) are connected to the third swing arm (63) as a whole. A first hinge hole (633) is provided on the two trapezoidal plates (632). A first reinforcing plate (634) is provided on one side of the two trapezoidal plates (632) for reinforcing the two trapezoidal plates (632), and a second reinforcing plate (635) is provided on the other side. The second reinforcing plate (635) is located between the first hinge hole (633) and the lower end of the first swing arm (61) and is connected to the third swing arm (63) and can be used for swing limit. V-shaped reinforcing plates (636) are also provided on both sides of the third swing arm (63). The swing actuator (65) includes a linear actuator (651), one end of which is hinged to the swing arm base (64), and the other end is hinged to the first hinge hole (633).

8. The door opening and closing mechanism of the linear guide grinding machine according to claim 1, characterized in that, The length of the third swing arm (63) is greater than the lengths of the first swing arm (61) and the second swing arm (62). The swing arm base (64) is provided with a hinge seat (642). The lower end of the third swing arm (63) is hinged to the hinge seat (642). The hinge seat (642) is provided with an extended hinge connector (643) connected to it at a position off-center from the hinge. The lower end of the first swing arm (61) is hinged to the extended hinge connector (643).

9. The door opening and closing mechanism of the linear guide grinding machine according to claim 1, characterized in that, An elastic auxiliary reset assembly (66) for assisting in closing the door is provided between the third swing arm (63) and the second swing arm (62).

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