A linkage safety protection door based on machine tools

Abstract

The present invention discloses a linkage safety protection door based on a machine tool, wherein two groups of protection doors symmetrically distributed on the left and right are slidably installed between the upper and lower movable rails by sliding blocks, and two groups of mounting covers are symmetrically fixed on the front side of the outer side of the machine tool shell, and a locking mechanism and an electromagnet are installed at the upper and lower ends of each mounting cover, and the locking mechanism is located directly behind the electromagnet, and the rear end part of the locking mechanism extends into the interior of the machine tool shell and is plugged into the protection door, and a limiting structure for limiting the locking mechanism is installed in the mounting cover near the side of the protection door for sliding up and down, and a sealing frame is installed, and the four edges of the sealing frame are respectively slidably connected with the four locking rods through movable rods, and cooperate with the guide inclined groove fixed on the machine tool shell. When the machine tool is processed, the sealing frame can fit between the protection doors to form a sealing structure, and dust, debris and water vapor will not enter the space between the protection door and the machine tool shell during subsequent processing.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tools, and in particular to a linkage safety protection door based on a machine tool. Background Art

[0002] When a machine tool is machining a workpiece, waste chips and cutting fluid generated during machining can splash outward, potentially endangering nearby operators. Machine tools are often equipped with protective doors to mitigate the threat posed by splashing material during machining. Opening the protective door during machining presents a significant safety concern. To prevent this, a signal collector is typically installed on the machine tool's protective door. When the door is fully closed, the collector's feedback signal is forwarded to the intelligent control module, which automatically detects the situation and controls the machine's operating status. When the protective door is open during cutting, the machine stops moving, preventing accidents.

[0003] This method can avoid the dangers caused by processing, but some personnel may repeatedly open the protective door during the processing due to their personalities during training and learning, which will also cause the machine tool processing to stop, resulting in reduced processing efficiency. At the same time, in order to reduce space occupation, most existing CNC machine tools will adopt a translational sliding protective door structure. During the CNC machine tool processing, debris in the processing chamber and some cutting fluid will splash and hit the protective door and the inner side of the machine tool, and easily fall into the gap between the CNC machine tool and the protective door. Over a long period of time, a large amount of debris and dust will accumulate in the gap between the two, causing the protective door to get stuck when opening and closing, which is not conducive to the normal translation opening and closing of the protective door. Summary of the Invention

[0004] The present invention proposes a linkage safety protection door based on a machine tool, which solves the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A linked safety protection door for a machine tool comprises a machine tool housing, wherein a lower shell plate and an upper shell plate are fixed to the lower front side and the upper front side of the machine tool housing, respectively; movable tracks are fixed to the inner walls of the lower shell plate and the upper shell plate; two sets of protective doors symmetrically distributed on the left and right are slidably mounted between the upper and lower movable tracks via sliders; a gap is provided between the protective door and the inner wall of the machine tool housing; the remaining gap prevents the protective door from getting stuck during translation even if debris or coolant residue adheres to the inner wall of the machine tool housing;

[0007] Two sets of mounting covers are fixed symmetrically on the front side of the exterior of the machine tool housing. A locking mechanism and an electromagnet are installed at the upper and lower ends of each mounting cover. The locking mechanism is located directly behind the electromagnet. The rear end of the locking mechanism extends into the interior of the machine tool housing and is plugged into the protective door. A limiting structure for limiting the locking mechanism is installed in the mounting cover on the side close to the protective door and slides up and down.

[0008] A sealing frame is slidably mounted on the front side of the inner wall of the machine tool housing, and the rear surface of the sealing frame abuts against the front surfaces of the two sets of protective doors;

[0009] The locking mechanism comprises a locking rod slidably inserted in the through-interface, and a rear end of the locking rod is inserted into the locking groove, and a magnetic pole is fixed to the front end of the locking rod. When the electromagnet is energized, the magnetic field formed by the electromagnet is the same as the polarity of the magnetic field of the magnetic pole itself, and the two repel each other, and the magnetic pole will drive the locking rod away from the electromagnet, and the locking rod moves backward and is inserted into the locking groove, so that the protective door can be locked and limited. An abutment block is fixed on the locking rod, and a part of the limiting notch is cut out to form an inserting inclined surface, and the limiting notch on the right abutment block is opened below the outside, and the inserting inclined surface on the right limiting notch is located on the inner side below the limiting notch, and the limiting notch on the left abutment block is opened above the outside, and the inserting inclined surface on the left limiting notch is located on the inner side above the limiting notch;

[0010] The two ends of the steel wire rope are placed in the connecting cover, and the two ends of the steel wire rope are respectively connected to the top of the two limit plates. The upper and lower ends of the limit plates are fixed with limit rods on the left and right sides, and the limit rods are inserted into the limiting notch. A fixing ring is also fixed on the guide post, and the fixing ring is in sliding contact with the surface of the limit plate. The design of the fixing ring ensures that the limit plate will not separate from the guide post and will not deviate from the position.

[0011] The guide bar hole is provided with a locking spring, one end of the locking spring is connected to the guide post, and the other end of the locking spring is connected to the top of the guide bar hole, the spring of the locking spring is greater than the elastic force of multiple return springs, and the locking spring in the left limit plate is a tension spring, so that the left limit plate always has a tendency to move downward, thereby causing the limit rod on the left limit plate to be stuck in the left limit notch, and the locking spring in the right limit plate is a spring, and the spring causes the right limit plate to always have a tendency to move upward, thereby causing the limit rod on the right limit plate to be stuck in the right limit notch;

[0012] A strip opening is provided at the lower right side of the right cover shell, and a toggle rod is fixed to the right side surface of the limit plate on the right side, and the toggle rod passes through the strip opening and is placed outside the cover shell, and a dial handle is fixed on the toggle rod, and a shielding curtain is provided on the strip opening, and one end of the shielding curtain is connected to the outer wall of the cover shell, and the other end is connected to the dial handle, which is used to shield the strip opening from dust. Pressing the dial handle down can make the limit plate on the right side move downward, and the downward moving limit plate on the right side will drive the limit rod on the right side to move downward, thereby making the limit rod on the right side disengage from the limit notch on the right side.

[0013] Preferably, an upper sealing plate is fixed at the lower part of the upper shell plate, and a bending portion is formed at the lower part of the upper sealing plate. Side sealing plates are respectively provided on the left and right sides of the upper sealing plate, and a lower sealing plate is fixed between the lower parts of the two side sealing plates. There is a gap between the lower sealing plate, the side sealing plate and the upper sealing plate and the protective door, and the lower sealing plate, the side sealing plate and the upper sealing plate are fixed to the machine tool housing at one end away from the protective door.

[0014] Preferably, an observation window is provided on the protective door, and a guide portion is formed inward at the lower end of the protective door. The setting of the guide portion allows the debris and coolant splashed by the machine tool during processing to flow along the protective door and the guide portion into a collection trough inside the machine tool. Locking grooves are provided at the upper and lower ends of the front surface of one end of the two groups of protective doors close to the corresponding mounting cover, and the locking grooves do not pass through the front and rear ends of the protective door.

[0015] The mounting cover includes a cover shell fixed to the surface of the machine tool housing by screws, a cover plate is installed in front of the cover shell by screws, an electromagnet is fixed on the inner wall of the cover plate, the electromagnet is connected in series with the power device of the machine tool through a power line, and the electromagnet will be energized when the machine tool starts running. The interior of the left and right ends of the connecting cover is connected to the upper part of the interior of the two groups of covers, and a silicon steel sheet magnetic conductive layer is added to the connecting cover, the cover shell and the cover plate to shield external magnetic field interference.

[0016] Preferably, a groove is provided on the side of the abutment block away from the magnetic pole, and a reset spring is sleeved on the locking rod. The two ends of the reset spring are respectively in abutment with the machine tool housing and the groove. The reset spring makes the abutment block and the locking rod always have a tendency to move forward.

[0017] Preferably, the outer surface of the sealing frame contacts the inner wall of the frame structure formed by the upper sealing plate, the lower sealing plate and the side sealing plates, and a sealing strip is provided on the rear side of the sealing frame, which is used to contact the protective door, thereby improving the sealing effect and avoiding pressure loss. It can ensure that external dust, debris and water vapor will not enter the space between the protective door and the machine tool housing during processing, avoid the accumulation of impurities in the moving track and the locking groove, and will not affect the movement and locking of the protective door;

[0018] The sealing frame includes two L-shaped plates that are symmetrical on the left and right. A top plate and a lower plate are fixed above and below the two L-shaped plates respectively. A contact slope is formed by cutting off the upper rear side of the top plate. The rear side of the top plate is flush with the rear side of the protective door. The slope of the contact slope is the same as the slope of the bent portion. When the sealing frame moves, the contact slope of the top plate is always in contact with the bent portion, so that impurities attached to the top plate can be scraped off.

[0019] Preferably, a connecting plate is welded to the upper and lower ends of the front sides of the two L-shaped plates, and a connecting bar hole is opened on the connecting plate. A movable rod is fixed to the portion of the locking rod extending into the interior of the machine tool housing, and the movable rod is inserted into the connecting bar hole. When the locking rod moves backward to lock the protective door, the movable rod will move backward together with it, thereby causing the sealing frame to move backward together. Conversely, when the locking rod moves forward, the sealing frame moves forward together and away from the protective door.

[0020] A plurality of groups of linearly distributed fixed guide plates are symmetrically arranged on the left and right sides of the front inner wall of the machine tool shell, and a guide bevel is provided on the fixed guide plate. A plurality of linearly distributed guide rods are provided on the front side of the L-shaped plate, and the guide rods are slidably inserted into the guide bevel. When the L-shaped plate moves forward, the guide rods will move along the guide bevel, so that the entire sealing frame moves forward and upward, so that the rear surface of the entire sealing frame can be completely separated from the protective door, and there will be no connection between the two, which is convenient for the subsequent translational opening of the protective door without jamming.

[0021] Beneficial effects of the present invention:

[0022] 1. Two sets of electromagnets are respectively provided on the left and right sides of the machine tool housing, and the electromagnets are connected to the power system of the machine tool. In conjunction with the provided locking mechanism, when the machine tool is running, the electromagnets are energized so that the locking mechanism can lock the protective door, making it impossible to open the protective door during machine operation, thereby improving safety.

[0023] 2. A set of limit plates are respectively provided on the left and right sides of the machine tool housing, and a limit rod for limiting the locking rod is provided on the limit plate, and the two limit plates are connected by a steel wire rope. After the locking rod locks the protective door, the multiple limit rods can automatically limit the locking rod. Even if the electromagnet fails and the magnetic force disappears, the limit rod can ensure that the locking rod will not be separated from the locking groove. Moreover, when the electromagnet fails and the protective door is closed, the limit rod can also push the locking rod to be inserted into the locking groove, ensuring that the door panel will not be opened, thereby improving safety. In addition, the set limit structure requires manual unlocking before the protective door is opened, which makes it take a certain amount of time to open the protective door, ensuring that the tool of the machine tool can stop or run at a lower speed, avoiding the threat of the tool running at high speed;

[0024] 3. A sealing frame is installed in the space between the protective door and the machine tool housing. The four edges of the sealing frame are slidably connected to the four locking rods through movable rods, and cooperate with the guide inclined groove fixed on the machine tool housing. When the machine tool is processing, the sealing frame can fit between the protective doors to form a sealing structure, ensuring that dust, debris and moisture will not enter the space between the protective door and the machine tool housing during subsequent processing, avoiding the accumulation of impurities in the moving track and the locking groove, and will not affect the movement and locking of the protective door. Before the protective door is opened, the sealing frame can also be completely away from the protective door, and there will be no connection between the two, which facilitates the smooth opening of the subsequent protective door without jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front view of a linkage safety protection door based on a machine tool proposed by the present invention;

[0026] Figure 2 A schematic diagram of the internal structure of a machine tool-based linked safety protection door, shown as a top view;

[0027] Figure 3 for Figure 2 Side view of;

[0028] Figure 4 for Figure 2 A in the middle is an enlarged schematic diagram;

[0029] Figure 5 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0030] Figure 6 This is an exploded view of the protective door, sealing frame, locking mechanism, and limiting structure;

[0031] Figure 7 It is a structural diagram of the locking mechanism and the limiting structure on the right side;

[0032] Figure 8It is a structural diagram of the locking mechanism and the limiting structure on the left.

[0033] Reference numerals in the figure: 1. Machine tool housing; 11. Lower shell plate; 12. Upper shell plate; 13. Upper sealing plate; 131. Side sealing plate; 132. Bend portion; 133. Lower sealing plate; 14. Fixed guide plate; 141. Guide chute; 2. Protective door; 21. Observation window; 22. Diversion portion; 23. Locking groove; 24. Moving track; 3. Mounting cover; 31. Cover; 311. Strip opening; 32. Cover plate; 33. Connecting cover; 4. Electromagnet; 5. Locking mechanism; 51 , locking rod; 52, magnetic pole; 53, abutment block; 531, limiting notch; 532, plug-in slope; 54, return spring; 55, movable rod; 6, limiting plate; 61, guide bar hole; 62, guide column; 63, toggle handle; 631, toggle rod; 64, locking spring; 65, limiting rod; 66, wire rope; 7, sealing frame; 701, L-shaped plate; 702, top plate; 703, lower plate; 71, connecting plate; 711, connecting bar hole; 72, guide rod. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Reference Figures 1-8 A linkage safety protection door based on a machine tool includes a machine tool housing 1. A lower shell plate 11 and an upper shell plate 12 are fixed to the lower front side and the upper front side of the machine tool housing 1 respectively. A movable track 24 is fixed to the inner wall of the lower shell plate 11 and the upper shell plate 12. Two groups of protective doors 2 distributed symmetrically on the left and right are slidably installed between the upper and lower movable tracks 24 through sliders. There is a gap between the protective door 2 and the inner wall of the machine tool housing 1. The remaining gap ensures that when there are debris or coolant residue attached to the inner wall of the machine tool housing 1, the protective door 2 will not get stuck during translation.

[0036] Two sets of mounting covers 3 are fixed symmetrically on the front side of the exterior of the machine tool housing 1. A locking mechanism 5 and an electromagnet 4 are installed at the upper and lower ends of each mounting cover 3. The locking mechanism 5 is located directly behind the electromagnet 4. The rear end of the locking mechanism 5 extends into the interior of the machine tool housing 1 and is plugged into the protective door 2. A limiting structure for limiting the locking mechanism 5 is installed on the side of the mounting cover 3 near the protective door 2 for sliding up and down;

[0037] A sealing frame 7 is slidably mounted on the front side of the inner wall of the machine tool housing 1 , and the rear surface of the sealing frame 7 abuts against the front surfaces of the two sets of protective doors 2 ;

[0038] There are through-interfaces at the upper and lower ends of the left and right sides of the machine tool housing 1. Four groups of through-interfaces are placed in two covers 31 in pairs. The locking mechanism 5 includes a locking rod 51 that is slidably inserted in the through-interface. The rear end of the locking rod 51 is inserted into the locking groove 23. The front end of the locking rod 51 is fixed with a magnetic pole 52. The magnetic field formed after the electromagnet 4 is energized has the same polarity as the magnetic field of the magnetic pole 52 itself, and the two repel each other. The magnetic pole 52 will drive the locking rod 51 away from the electromagnet 4, and the locking rod 51 moves backward and is inserted into the locking groove 23, so that the protective door 2 can be locked and limited.

[0039] An abutment block 53 is fixed to the locking rod 51. The abutment block 53 is provided with a limiting notch 531. A portion of the limiting notch 531 is cut away to form an insertion slope 532. The limiting notch 531 on the right abutment block 53 is provided at the lower portion of the outside thereof. The insertion slope 532 on the right limiting notch 531 is located below the limiting notch 531 and faces inward. The limiting notch 531 on the left abutment block 53 is provided at the upper portion of the outside thereof. The insertion slope 532 on the left limiting notch 531 is located above the limiting notch 531 and faces inward.

[0040] The limiting structure includes two limiting plates 6, which are penetrated by guide strip holes 61 on the left and right sides of the limiting plates 6, and a guide post 62 is inserted into the guide strip hole 61 for sliding up and down. The guide post 62 is fixed to the inner wall of the cover shell 31, and the limiting plate 6 is in sliding contact with the inner wall of the cover shell 31. A connecting cover 33 is fixed between the tops of the two groups of cover shells 31, and a steel wire rope 66 is placed in the connecting cover 33. Both ends of the steel wire rope 66 extend into the two cover shells 31, and the two ends of the steel wire rope 66 are respectively connected to the top ends of the two limiting plates 6. Limiting rods 65 are fixed on the left and right sides of the upper end of the limiting plate 6, and the limiting rod 65 is inserted into the limiting notch 531. A fixing ring is also fixed on the guide post 62, and the fixing ring is in sliding contact with the surface of the limiting plate 6. The design of the fixing ring ensures that the limiting plate 6 will not separate from the guide post 62 and will not deviate from the position.

[0041] A locking spring 64 is provided in the guide bar hole 61, one end of the locking spring 64 is connected to the guide post 62, and the other end of the locking spring 64 is connected to the top of the guide bar hole 61. The elastic force of the locking spring 64 is greater than the elastic force of the multiple return springs 54. The locking spring 64 in the left limit plate 6 is a tension spring, which makes the left limit plate 6 always have a tendency to move downward, thereby making the limit rod 65 on the left limit plate 6 stuck in the limit notch 531 on the left, and the locking spring 64 in the right limit plate 6 is a spring, which makes the right limit plate 6 always have a tendency to move upward, thereby making the limit rod 65 on the right limit plate 6 stuck in the limit notch 531 on the right;

[0042] A strip opening 311 is provided at the lower right side of the right cover shell 31, and a toggle rod 631 is fixed to the right side surface of the right limit plate 6. The toggle rod 631 passes through the strip opening 311 and is placed outside the cover shell 31. A toggle hand 63 is fixed to the toggle rod 631, and a shielding curtain is provided on the strip opening 311. One end of the shielding curtain is connected to the outer wall of the cover shell 31, and the other end is connected to the toggle hand 63, which is used to shield the strip opening 311 from dust. Pressing down the toggle hand 63 can make the right limit plate 6 move downward, and the downward moving right limit plate 6 will drive the right limit rod 65 to move downward, thereby making the right limit rod 65 disengage from the right limit notch 531.

[0043] Reference Figure 2-Figure 6 An upper sealing plate 13 is fixed at the lower part of the upper shell plate 12, and a bent portion 132 is formed at the lower part of the upper sealing plate 13. Side sealing plates 131 are respectively provided on the left and right sides of the upper sealing plate 13, and a lower sealing plate 133 is fixed between the lower parts of the two side sealing plates 131. There is a gap between the lower sealing plate 133, the side sealing plates 131 and the upper sealing plate 13 and the protective door 2. The lower sealing plate 133, the side sealing plate 131 and the upper sealing plate 13 are fixed to the machine tool housing 1 at one end away from the protective door 2.

[0044] An observation window 21 is provided on the protective door 2, and a guide portion 22 is formed inward at the lower end of the protective door 2. The setting of the guide portion 22 allows the debris and coolant splashed by the machine tool during processing to flow along the protective door 2 and the guide portion 22 into the collection tank inside the machine tool. Locking grooves 23 are provided at the upper and lower ends of the front surface of one end of the two sets of protective doors 2 close to the corresponding mounting cover 3, and the locking grooves 23 do not pass through the front and rear ends of the protective door 2.

[0045] Reference Figure 2-Figure 5 The mounting cover 3 includes a cover shell 31 fixed to the surface of the machine tool housing 1 by screws, and a cover plate 32 is installed in front of the cover shell 31 by screws. The electromagnet 4 is fixed on the inner wall of the cover plate 32. The electromagnet 4 is connected in series with the power device of the machine tool through a power line. When the machine tool is started, the electromagnet 4 will be energized. The left and right ends of the connecting cover 33 are connected with the upper part of the interior of the two groups of cover shells 31. A silicon steel sheet magnetic conductive layer is added to the connecting cover 33, the cover shell 31 and the cover plate 32 to shield external magnetic field interference.

[0046] Reference Figure 4-Figure 8 A groove is provided on the side of the abutment block 53 away from the magnetic pole 52, and a return spring 54 is sleeved on the locking rod 51. The two ends of the return spring 54 are respectively in contact with the machine tool housing 1 and the groove. The return spring 54 makes the abutment block 53 and the locking rod 51 always have a tendency to move forward. When the power supply of the electromagnet 4 is disconnected and the magnetism disappears, the locking rod 51 will move forward under the action of the return spring 54, and the rear end of the locking rod 51 will be out of the locking groove 23, thereby releasing the locking limit of the protective door 2 and the protective door 2 can be opened.

[0047] Reference Figure 3-Figure 8 After the left and right protective doors 2 are closed, the locking rod 51 is located just in front of the locking groove 23. Even if the electromagnet 4 fails, under the action of the locking spring 64, the multiple limit rods 65 on the left and right sides can be respectively inserted into the corresponding limit notches 531 along the insertion inclined surface 532, thereby pushing the locking rod 51 to move backward and insert it into the locking groove 23, thereby limiting the protective door 2. When the protective door 2 is opened, the locking rod 51 cannot be inserted into the locking groove 23, and the limit rod 65 is squeezed and cannot be inserted into the limit notch 531.

[0048] When the right limit plate 6 moves downward, it will drive the right end of the wire rope 66 to move downward together, and the left end of the wire rope 66 will move upward, thereby causing the left limit plate 6 to move upward together. The limit rod 65 on the left limit plate 6 will move upward to disengage from the left limit notch 531, thereby causing multiple limit rods 65 to simultaneously disengage from the limit on the locking mechanism 5, allowing the locking rod 51 to disengage from the locking groove 23.

[0049] Reference Figure 4-Figure 8 The outer surface of the sealing frame 7 contacts the inner wall of the frame structure composed of the upper sealing plate 13, the lower sealing plate 133 and the side sealing plate 131. A sealing strip is provided on the rear side of the sealing frame 7. The sealing strip is used to contact the protective door 2, thereby improving the sealing effect and avoiding pressure loss. It can ensure that external dust, debris and water vapor will not enter the space between the protective door 2 and the machine tool housing 1 during processing, avoid the accumulation of impurities in the moving track 24 and the locking groove 23, and will not affect the movement and locking of the protective door 2.

[0050] The sealing frame 7 includes two L-shaped plates 701 that are symmetrical on the left and right. A top plate 702 and a lower plate 703 are fixed above and below the two L-shaped plates 701 respectively. A contact slope is formed on the upper rear side of the top plate 702. The rear side of the top plate 702 is flush with the rear side of the protective door 2. The slope of the contact slope is the same as the slope of the bent portion 132. The two L-shaped plates 701 are respectively located at the left and right ends of the rear side of the machine tool shell, and the top plate 702 and the lower plate 703 are respectively located on the inner walls of the rear sides of the upper shell plate 12 and the lower shell plate 11. The two L-shaped plates 701 are respectively in sliding contact with the inward surfaces of the left and right side sealing plates 131, and the top plate 702 and the lower plate 703 are respectively in sliding contact with the upper surfaces of the bent portion 132 of the upper sealing plate and the lower sealing plate 133. When the sealing frame 7 moves, the contact slope of the top plate 702 is always in contact with the bent portion 132, so that impurities attached to the top plate 702 can be scraped off.

[0051] A connecting plate 71 is welded to the upper and lower ends of the front sides of the two L-shaped plates 701, and a connecting bar hole 711 is opened on the connecting plate 71. A movable rod 55 is fixed to the portion of the locking rod 51 that extends into the interior of the machine tool housing 1. The movable rod 55 is inserted into the connecting bar hole 711. When the locking rod 51 moves backward to lock the protective door 2, the movable rod 55 will move backward together with it, thereby causing the sealing frame 7 to move backward together. Conversely, when the locking rod 51 moves forward, the sealing frame 7 moves forward together and away from the protective door 2.

[0052] A plurality of groups of linearly distributed fixed guide plates 14 are symmetrically provided on the front side of the inner wall of the machine tool housing 1. A guide inclined groove 141 is provided on the fixed guide plate 14. A plurality of linearly distributed guide rods 72 are provided on the front side of the L-shaped plate 701. The guide rods 72 are slidably inserted into the guide inclined groove 141. When the L-shaped plate 701 moves backward, the entire sealing frame 7 moves backward and downward along the guide inclined groove 141. The lower end surface of the top plate 702 will contact the top surface of the protective door 2, and the lower plate 703 will contact the lower front surface of the protective door 2. The lower surface of the top of the L-shaped plate 701 contacts the top surface of the protective door 2, and the rear surface of the L-shaped plate 701 contacts the front surface of the protective door 2, forming a sealed structure as a whole, ensuring that the internal odor will not spread outward when the machine tool processes special parts, ensuring the cleanliness of the surrounding environment, and reducing the noise produced during processing;

[0053] When the L-shaped plate 701 moves forward, the guide rod 72 will move along the guide inclined groove 141, so that the entire sealing frame 7 moves forward and upward. This ensures that the rear surface of the entire sealing frame 7 can be completely separated from the protective door 2 without any connection between the two, which facilitates the subsequent translational opening of the protective door 2 without any jamming.

[0054] Working principle: A light barrier is set on the two protective doors 2, and the light barrier is connected to the PLC of the machine tool through a signal line. A relevant program is written. When the protective door 2 is closed, the light barrier detects the corresponding signal, and the power device of the machine tool can be operated to enable the machine tool to perform processing operations;

[0055] During this process, the electromagnet 4 will also be energized to form a magnetic field. The magnetic field formed by the electromagnet 4 after being energized has the same polarity as the magnetic field of the magnetic pole 52 itself, and the two repel each other. Since the electromagnet 4 is fixed, the magnetic pole 52 will be subjected to a force moving backward, and the magnetic pole 52 will push the locking rod 51 to move backward together. The locking rod 51 moving backward will be inserted into the locking groove 23, thereby limiting the protective door 2, making it impossible to open the protective door 2 during the machine tool processing, thereby improving safety.

[0056] When the locking rod 51 moves backward, the movable rod 55 on the locking rod 51 will move backward together with it. Since the movable rod 55 is movably inserted into the connecting bar hole 711 of the connecting plate 71 on the sealing frame 7, the sealing frame 7 can move backward together. When the sealing frame 7 moves backward, the guide rod 72 will move along the guiding inclined groove 141, so that the entire sealing frame 7 moves backward and downward. In this way, it can be ensured that the rear side surface of the entire sealing frame 7 can be completely in contact with and pressed against the protective door 2 without any gap between the two. This ensures that dust, debris and water vapor will not enter the space between the protective door 2 and the machine tool housing 1 during subsequent processing, and avoids the accumulation of impurities in the movable track 24 and the locking groove 23, which will not affect the movement and locking of the protective door 2.

[0057] When the locking rod 51 is moved into place, the limiting notch 531 on the abutting block 53 of the locking rod 51 is flush with the position of the limiting rod 65. Since the limiting notch 531 is provided above the abutting block 53 on the right and the limiting notch 531 is provided below the abutting block 53 on the left, and the limiting plate 6 on the left always has a tendency to move downward under the action of the tension spring, the limiting rod 65 on the left limiting plate 6 is stuck in the limiting notch 531 on the left, and the limiting rod 65 on the right is stuck in the limiting notch 531 on the left. Under the action of the spring, the positioning plate 6 always has a tendency to move upward. The limiting plate 6 on the left drives the limiting rod 65 to move downward, and the limiting plate 6 on the right drives the limiting rod 65 to move upward. Multiple limiting rods 65 will be respectively connected to the corresponding limiting notches 531, thereby limiting the locking rod 51. Even if the electromagnet 4 fails and the magnetic force disappears, the limiting rod 65 can ensure that the locking rod 51 will not disengage from the locking groove 23, ensuring that the protective door 2 will not be opened, thereby improving safety.

[0058] After the processing is completed, the power supply of the power device of the block machine tool is cut off, which causes the power supply of the electromagnet 4 to be cut off, the electromagnet 4 no longer generates a magnetic field, and the magnetic force between the electromagnet 4 and the magnetic pole 52 disappears;

[0059] Then, the user presses the dial handle 63 downward to move the right limiting plate 6 downward. The downwardly moving right limiting plate 6 will drive the right limiting rod 65 to move downward, thereby causing the right limiting rod 65 to disengage from the right limiting notch 531. At the same time, the downward movement of the right limiting plate 6 will drive the right end of the steel wire rope 66 to move downward together, and the left end of the steel wire rope 66 will move upward, thereby causing the left limiting plate 6 to move upward together, and the limiting rod 65 on the left limiting plate 6 will move upward and disengage from the left limiting notch 531, thereby causing multiple limiting rods 65 to simultaneously disengage from the limit of the locking mechanism 5.

[0060] Since the return spring 54 is always in an extruded and compressed state, the return spring 54 tends to move forward. After the plurality of limiting rods 65 are disengaged from the limiting notches 531, the locking rod 51 and the magnetic pole 52 will move forward under the action of the return spring 54, thereby causing the rear end of the locking rod 51 to disengage from the locking groove 23 on the protective door 2, thereby releasing the protective door 2 from being restricted.

[0061] After that, the lever 63 can be released. The lever 63 will move upward along with the right limit plate 6 under the action of the locking spring 64, and the left limit plate 6 will move downward. The limit rod 65 on the left limit plate 6 will contact the upper surface of the left abutment block 53, and the limit rod 65 on the right limit plate 6 will contact the upper surface of the right abutment block 53, waiting for the next locking rod 51 to be locked and snapped into the limit notch 531;

[0062] When the locking rod 51 moves forward, the movable rod 55 on the locking rod 51 will move forward together with it. Since the movable rod 55 is movably inserted into the connecting bar hole 711 of the connecting plate 71 on the sealing frame 7, the sealing frame 7 can move forward together, and when the sealing frame 7 moves forward, the guide rod 72 will move along the guide inclined groove 141, so that the entire sealing frame 7 moves forward and upward, so that the rear side surface of the entire sealing frame 7 can be completely separated from the protective door 2. There is a certain distance between the sealing frame 7, the inner wall of the machine tool housing 1 and the two protective doors 2, which prevents impurities from adhering to the machine tool housing 1 and causing the protective door 2 to open and get stuck.

[0063] By providing two sets of electromagnets 4 on the left and right sides of the machine tool housing 1, and connecting the electromagnets 4 to the power system of the machine tool, and cooperating with the provided locking mechanism 5, when the machine tool is running, the electromagnets 4 are energized so that the locking mechanism 5 can lock the protective door 2, so that the protective door 2 cannot be opened when the machine tool is running, thereby improving safety;

[0064] By arranging a group of limit plates 6 on the left and right sides of the machine tool housing 1, a limit rod 65 for limiting the locking rod 51 is arranged on the limit plates 6, and the two limit plates 6 are connected by a wire rope 66. After the locking rod 51 locks the protective door 2, the multiple limit rods 65 can automatically limit the locking rod 51. Even if the electromagnet 4 fails and the magnetic force disappears, the limit rod 65 can ensure that the locking rod 51 will not be separated from the locking groove 23, ensuring that the protective door 2 will not be opened, thereby improving safety. In addition, the set limit structure requires manual unlocking of the protective door 2 before opening, which makes it take a certain amount of time to open the protective door 2, ensuring that the tool of the machine tool can stop or run at a lower speed, avoiding the threat posed by the tool running at high speed;

[0065] By installing a sealing frame 7 in the space between the protective door 2 and the machine tool housing 1, the four edges of the sealing frame 7 are slidably connected to the four locking rods 51 through the movable rod 55, and cooperate with the guide inclined groove 141 fixed on the machine tool housing 1. When the machine tool is processing, the sealing frame 7 can fit with the protective door 2 to form a sealing structure, ensuring that dust, debris and moisture will not enter the space between the protective door 2 and the machine tool housing 1 during subsequent processing, avoiding the accumulation of impurities in the moving track 24 and the locking groove 23, and will not affect the movement and locking of the protective door 2. Before the protective door 2 is opened, the sealing frame 7 can also be completely away from the protective door 2, and there will be no connection between the two, which facilitates the smooth opening of the subsequent protective door 2 without jamming.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0068] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A linkage safety protection door based on a machine tool, characterized in that: The machine tool housing (1) comprises a lower shell plate (11) and an upper shell plate (12) fixed to the lower and upper front sides of the machine tool housing (1), respectively; movable rails (24) are fixed to the inner walls of the lower shell plate (11) and the upper shell plate (12); two sets of protective doors (2) symmetrically distributed on the left and right are slidably mounted between the upper and lower movable rails (24) via sliders; Two groups of mounting covers (3) are fixed symmetrically on the front side of the exterior of the machine tool housing (1), and a locking mechanism (5) and an electromagnet (4) are installed at both upper and lower ends of each mounting cover (3). The locking mechanism (5) is located directly behind the electromagnet (4), and the rear end of the locking mechanism (5) extends into the interior of the machine tool housing (1) and is plugged into the protective door (2). A limiting structure for limiting the locking mechanism (5) is installed on the side of the mounting cover (3) close to the protective door (2) in a sliding manner up and down. A sealing frame (7) is installed on the front side of the inner wall of the machine tool housing (1) in a sliding manner forward and backward, and the rear surface of the sealing frame (7) abuts against the front surfaces of the two groups of protective doors (2); The upper and lower ends of the left and right sides of the machine tool housing (1) are provided with through-interfaces, and four groups of through-interfaces are placed in two housings (31) in pairs. The locking mechanism (5) includes a locking rod (51) slidably inserted in the through-interfaces, the rear end of the locking rod (51) is inserted into the locking groove (23), the front end of the locking rod (51) is fixed with a magnetic pole (52), the locking rod (51) is fixed with an abutment block (53), and the abutment block (53) is provided with a limiting notch (531). The limiting notch The cut-away portion of (531) is formed with an inserting inclined surface (532), the limiting notch (531) on the right side of the abutting block (53) is opened below the outside thereof, and the inserting inclined surface (532) on the right side of the limiting notch (531) is located below the limiting notch (531) and faces inward, the limiting notch (531) on the left side of the abutting block (53) is opened above the outside thereof, and the inserting inclined surface (532) on the left side of the limiting notch (531) is located above the limiting notch (531) and faces inward; The limiting structure includes two limiting plates (6), the limiting plates (6) are formed with guide strip holes (61) on the left and right sides, and a guide column (62) is inserted into the guide strip hole (61) for sliding up and down, and the guide column (62) is fixed to the inner wall of the cover shell (31). The limiting plate (6) is in sliding contact with the inner wall of the cover shell (31) on the up and down sides, and a connecting cover (33) is fixed between the tops of the two groups of cover shells (31). A steel wire rope (66) is placed in the connecting cover (33), and both ends of the steel wire rope (66) extend into the two cover shells (31), and the two ends of the steel wire rope (66) are respectively connected to the top ends of the two limiting plates (6), and limiting rods (65) are fixed on both the left and right sides of the upper end of the limiting plate (6), and the limiting rod (65) is inserted into the limiting notch (531); A locking spring (64) is provided in the guide bar hole (61), one end of the locking spring (64) is connected to the guide column (62), and the other end of the locking spring (64) is connected to the top end of the guide bar hole (61), and the spring force of the locking spring (64) is greater than the elastic force of the plurality of return springs (54); A strip opening (311) is provided at the lower right side of the right cover shell (31), and a toggle rod (631) is fixed to the right side surface of the right limit plate (6). The toggle rod (631) passes through the strip opening (311) and is placed outside the cover shell (31). A toggle handle (63) is fixed to the toggle rod (631).

2. The linkage safety protection door based on a machine tool according to claim 1 is characterized in that: An upper sealing plate (13) is fixed at the lower part of the upper shell plate (12), and a bent portion (132) is formed at the lower part of the upper sealing plate (13). Side sealing plates (131) are respectively provided on the left and right sides of the upper sealing plate (13), and a lower sealing plate (133) is fixed between the lower parts of the two side sealing plates (131). There is a gap between the lower sealing plate (133), the side sealing plates (131) and the upper sealing plate (13) and the protective door (2).

3. The linkage safety protection door based on a machine tool according to claim 1 is characterized in that: An observation window (21) is provided on the protective door (2), and a guide portion (22) is formed inwardly at the lower end of the protective door (2); Locking grooves (23) are provided at both upper and lower ends of the front side surfaces of one end of the two groups of protective doors (2) close to the corresponding mounting cover (3), and the locking grooves (23) do not pass through the front and rear ends of the protective doors (2).

4. The linkage safety protection door based on a machine tool according to claim 2, characterized in that: The mounting cover (3) comprises a cover shell (31) fixed to the surface of the machine tool housing (1) by screws, a cover plate (32) is fixed to the front of the cover shell (31) by screws, the electromagnet (4) is fixed to the inner wall of the cover plate (32), and the interiors of the left and right ends of the connecting cover (33) are connected to the upper interiors of the two sets of cover shells (31).

5. The machine tool-based linked safety protection door according to claim 1, characterized in that: A groove is provided on the side of the abutment block (53) away from the magnetic pole (52), a return spring (54) is sleeved on the locking rod (51), and two ends of the return spring (54) are respectively in abutment with the machine tool housing (1) and the groove.

6. The machine tool-based linked safety protection door according to claim 5, characterized in that: The outer surface of the sealing frame (7) contacts the inner wall of the frame structure formed by the upper sealing plate (13), the lower sealing plate (133) and the side sealing plate (131); The sealing frame (7) comprises two L-shaped plates (701) that are symmetrical on both sides. A top plate (702) and a bottom plate (703) are fixed above and below the two L-shaped plates (701), respectively. A contact slope is formed by cutting away a portion of the upper rear side of the top plate (702). The rear side of the top plate (702) is flush with the rear side of the protective door (2), and the slope of the contact slope is the same as the slope of the bent portion (132).

7. The machine tool-based linked safety protection door according to claim 6, characterized in that: A connecting plate (71) is welded to the upper and lower ends of the front sides of the two L-shaped plates (701), and a connecting bar hole (711) is provided on the connecting plate (71). A movable rod (55) is fixed to the portion of the locking rod (51) that extends into the interior of the machine tool housing (1), and the movable rod (55) is inserted into the connecting bar hole (711); A plurality of linearly distributed fixed guide plates (14) are symmetrically arranged on the front side of the inner wall of the machine tool housing (1), and a guide bevel groove (141) is provided on the fixed guide plates (14). A plurality of linearly distributed guide rods (72) are arranged on the front side of the L-shaped plate (701), and the guide rods (72) are slidably inserted into the guide bevel groove (141).

Images