A pneumatic safety locking structure

Abstract

This invention relates to the field of safety lock technology, specifically to a pneumatic safety locking structure, including a switch cabinet and a locking assembly. The switch cabinet has doors symmetrically hinged to one side of its opening. The locking assembly includes a cover located at the middle of the upper part of the switch cabinet near the door. Inside the cover, on the inner wall near the switch cabinet, a mounting seat is horizontally arranged. A cylinder is vertically arranged at the bottom of the mounting seat, with its piston rod sliding through the bottom of the mounting seat. A connecting slide is horizontally arranged at the bottom of the connecting slide, with locking pins vertically arranged at both ends. These locking pins slide through the bottom of the cover. Vertical mounting plates are vertically arranged near the top of each cabinet door. This invention, through the combined use of a drive assembly, a transmission assembly, and a bolt-lock assembly, avoids the cabinet door failing to close when the vertical mounting plates are misaligned, effectively improving the locking effect of the cabinet door and increasing the stability of the locking structure.

Description

Technical Field

[0001] This invention relates to the field of safety lock technology, and in particular to a pneumatic safety locking structure. Background Technology

[0002] During the production process in the workshop, in order to ensure that the power supply of the equipment is completely shut off and the equipment is kept in a safe state, safety locks are often installed to lock the electrical equipment such as distribution cabinets or switch cabinets, preventing unauthorized personnel from operating the equipment and also serving as a warning.

[0003] However, existing conventional safety locks are complex and cumbersome to operate, failing to meet customers' needs for quick disassembly and repair, and are difficult to apply quickly to multiple usage scenarios, thus affecting work efficiency. Therefore, it is necessary to design a locking structure that is easy to open and close and simple to operate. Summary of the Invention

[0004] In view of this, the purpose of this invention is to propose a pneumatic safety locking structure to solve the problems of complex operation of locking structures and difficulty in quick application to multiple usage scenarios.

[0005] To achieve the above objectives, the present invention provides a pneumatic safety locking structure.

[0006] A pneumatic safety locking structure includes a switch cabinet and a locking assembly. The switch cabinet has doors symmetrically hinged to its opening side. The locking assembly includes a cover located at the middle of the upper part of the switch cabinet near the door. A mounting base is horizontally arranged on the inner wall of the cover near the switch cabinet. A cylinder is vertically arranged at the bottom of the mounting base, and the piston rod of the cylinder slides through the bottom of the mounting base. A connecting slide is horizontally arranged at the bottom of the connecting slide, and locking pins are vertically arranged at both ends of the bottom of the connecting slide. The locking pins slide through the bottom of the cover. Vertical mounting plates are vertically arranged near the upper part of each cabinet door, and a locking mechanism is welded to the upper part of the mounting plates on the side away from the cabinet door. The Z-shaped bends have locking pins that slide through the bottom of adjacent Z-shaped bends near the cabinet door. A lever is inserted in the middle of the upper part of the switch cabinet, and the lever passes through both the switch cabinet and the cover. The upper inner wall of the switch cabinet has symmetrical hinge seats, which are all hinged to the same lever. The bottom of the connecting slide has a vertical U-shaped pull rod, and the lower part of the U-shaped pull rod slides through the end of the lever. A straight groove is opened at the intersection of the lever and the U-shaped pull rod. The cabinet door is provided with an L-shaped bolt seat on the side inside the switch cabinet, and the upper opening of the L-shaped bolt seat is provided with a bolt locking assembly for fixing the cabinet door.

[0007] Furthermore, the bolting assembly includes bolt rods that are slidably inserted into one end of the upper opening of the L-shaped bolt seat. A rotating rod is inserted into the end of the bolt rod away from the L-shaped bolt seat. The end of the rotating rod is rotatably connected to the inner wall of the switch cabinet near the cabinet door. A spur gear is sleeved on the end of the rotating rod away from the cabinet door. A transmission component for controlling the rotation of the bolt rod is provided on the side of the spur gear near the inner wall of the switch cabinet.

[0008] Furthermore, the transmission assembly includes a rack that meshes with a spur gear on the side of the switch cabinet closest to the inner wall. Each rack has a slide rail slidably inserted on the side away from the spur gear. Each slide rail is fixed to the inner wall of an adjacent side inside the switch cabinet. Each rack has a combined drive assembly on its upper part for controlling the synchronous rotation of the bolt rod.

[0009] Furthermore, the combined drive assembly includes a connecting rod laterally disposed on the upper part of the rack, the connecting rod slidingly passing through the lever located at one end of the switch cabinet, a straight slot is provided at the intersection of the lever and the connecting rod, and the connecting rod is slidably inserted into the straight slot.

[0010] Furthermore, the housing is equipped with vertically symmetrical proximity switches inside, with the bottom monitoring end of the proximity switch penetrating through the bottom of the housing and forming a magnetic field induction with the top of the Z-shaped bend on the adjacent side.

[0011] Furthermore, an integrated controller is provided inside the housing, which is electrically connected to a proximity switch. The cylinder is connected to a solenoid valve via an air pipe, and the solenoid valve is electrically connected to the integrated controller.

[0012] Furthermore, infrared gratings are symmetrically arranged at both ends of the switch cabinet near the cabinet door, and the infrared gratings are electrically connected to the integrated controller.

[0013] Furthermore, the connecting slide is vertically and symmetrically slidably inserted with guide rails on the side near the switch cabinet, and the guide rails are all fixed to the same adjacent inner wall of the cover.

[0014] Furthermore, each of the vertical mounting plates has a waist-shaped hole, and a fastening bolt is slidably inserted into the waist-shaped hole. The fastening bolt is threaded to the cabinet door on the adjacent side.

[0015] Furthermore, each cabinet door is provided with a second magnet on the upper part of one side inside the switch cabinet. Each switch cabinet is provided with a mounting plate on the side near the second magnet. Each mounting plate is provided with a first magnet on the lower part of the side near the second magnet on the adjacent side. The first magnet and the second magnet on the adjacent side form a magnetic attraction effect.

[0016] The beneficial effects of this invention are:

[0017] 1. This invention uses a combination of a drive assembly, a transmission assembly, and a bolt assembly to lock the cabinet door with a locking pin while simultaneously restricting the movement of the L-shaped bolt seat by rotating the bolt. This creates a double lock for both opening and closing the cabinet door, preventing the door from failing to close when the vertical mounting plate is misaligned. This effectively improves the locking effect of the cabinet door and increases the stability of the locking structure.

[0018] 2. This invention uses an infrared grating in conjunction with a proximity switch. When personnel approach the switch cabinet, the cylinder automatically operates, causing the locking pin to move, thus allowing the cabinet door to open quickly. When the cabinet door is in the normally open state, it blocks the light transmission and reception of the infrared grating. Therefore, personnel do not need to manually block the light transmission and reception of the infrared grating; the locking structure can be kept in the normally open state simply by opening the cabinet door. This effectively reduces the complexity of use, improves equipment safety, and meets the needs of rapid disassembly and maintenance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the locking component structure according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram showing the connection position between the Z-shaped bend and the locking pin in an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the internal structure of the switchgear according to an embodiment of the present invention;

[0024] Figure 5 Embodiments of the present invention Figure 1 A magnified schematic diagram of the local structure at point A;

[0025] Figure 6 Embodiments of the present invention Figure 4 A magnified schematic diagram of the local structure at point B;

[0026] Figure 7 This is a schematic diagram of the cross-sectional structure of the switch cabinet and its enclosure according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the bolt-lock assembly structure according to an embodiment of the present invention;

[0028] Figure 9 Embodiments of the present invention Figure 7 A magnified schematic diagram of the local structure at point C;

[0029] Figure 10 Embodiments of the present invention Figure 8 A magnified schematic diagram of the local structure at point D.

[0030] The diagram is marked as follows:

[0031] 1. Switch cabinet; 2. Locking assembly; 200. Cover; 201. Mounting base; 202. Cylinder; 203. Connecting slide; 204. Guide rail; 205. Locking pin; 3. Cabinet door; 4. Infrared grating; 5. Proximity switch; 6. Integrated controller; 7. Vertical mounting plate; 71. Waist-shaped hole; 8. Z-shaped bend; 9. Fastening bolt; 10. Mounting plate; 11. First magnet; 12. Second magnet; 13. U-shaped pull rod; 14. Lever; 15. Straight slot; 16. Hinge seat; 17. Connecting rod; 18. Straight rack; 19. Slide rail; 20. Spur gear; 21. Rotating rod; 22. Bolt rod; 23. L-shaped bolt seat. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0033] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] like Figures 1 to 10As shown, a pneumatic safety locking structure includes a switch cabinet 1 and a locking assembly 2. The switch cabinet 1 has cabinet doors 3 symmetrically hinged to one side of its opening. The locking assembly 2 includes a cover 200 located at the middle of the upper part of the switch cabinet 1 near the cabinet door 3. A mounting base 201 is horizontally arranged on the inner wall of the cover 200 near the switch cabinet 1. A cylinder 202 is vertically arranged at the bottom of the mounting base 201. The piston rod of the cylinder 202 slides through the bottom of the mounting base 201, and a connecting slide 203 is horizontally arranged at the bottom. Locking pins 205 are vertically arranged at both ends of the bottom of the connecting slide 203, and both locking pins 205 slide through the bottom of the cover 200. Vertical mounting plates 7 are vertically arranged near the upper part of each cabinet door 3, with the upper part of the mounting plates 7 being away from the cabinet door 3. Each side is welded with a Z-shaped bend 8. The bottom of the locking pin 205 slides through the Z-shaped bend 8 on the adjacent side near the end of the cabinet door 3. A lever 14 is inserted at the middle position of the upper part of the switch cabinet 1. The lever 14 passes through both the switch cabinet 1 and the cover 200. The upper inner wall of the switch cabinet 1 is symmetrically provided with hinge seats 16. The hinge seats 16 are all hinged to the same lever 14. The bottom of the connecting slide 203 is provided with a U-shaped pull rod 13. The lower part of the U-shaped pull rod 13 slides through the end of the lever 14. A straight slot 15 is opened at the intersection of the lever 14 and the U-shaped pull rod 13. The cabinet door 3 is provided with an L-shaped bolt seat 23 on the side inside the switch cabinet 1. The upper opening of the L-shaped bolt seat 23 is provided with a bolt locking assembly for fixing the cabinet door 3.

[0035] In the specific implementation method, see [reference] Figure 8 The bolting assembly includes bolt rods 22 that are slidably inserted into one end of the upper opening of the L-shaped bolt seat 23. A rotating rod 21 is inserted into the end of the bolt rod 22 away from the L-shaped bolt seat 23. The end of the rotating rod 21 is rotatably connected to the inner wall of the switch cabinet 1 near the cabinet door 3. A spur gear 20 is sleeved on the end of the rotating rod 21 away from the cabinet door 3. A transmission component for controlling the rotation of the bolt rod 22 is provided on the side of the spur gear 20 near the inner wall of the switch cabinet 1.

[0036] For details, please refer to Figure 8 , Figure 9 as well as Figure 10 The transmission assembly includes a rack 18 that meshes with the spur gear 20 on the side near the inner wall of the switch cabinet 1. Each rack 18 on the side away from the spur gear 20 is slidably fitted with a slide rail 19. Each slide rail 19 is fixed to the inner wall of an adjacent side inside the switch cabinet 1. Each rack 18 is equipped with a combined drive assembly for controlling the synchronous rotation of the bolt rod 22.

[0037] For details, please refer to Figure 8 The combined drive assembly includes a connecting rod 17 horizontally disposed on the upper part of the rack 18. The connecting rod 17 slides through the lever 14 located at one end of the switch cabinet 1. A straight slot 15 is provided at the intersection of the lever 14 and the connecting rod 17. The connecting rod 17 is slidably inserted into the straight slot 15.

[0038] For details, please refer to Figure 2 as well as Figure 3 The housing 200 is vertically symmetrically equipped with proximity switches 5. The bottom monitoring end of the proximity switch 5 extends through the bottom of the housing 200 and forms a magnetic field induction with the top of the Z-shaped bend 8 on the adjacent side.

[0039] For details, please refer to Figure 2 The housing 200 has an integrated controller 6 inside, which is electrically connected to the proximity switch 5. The cylinder 202 is connected to a solenoid valve through an air pipe, and the solenoid valve is electrically connected to the integrated controller 6.

[0040] For details, please refer to Figure 1 Infrared gratings 4 are symmetrically arranged at both ends of the switch cabinet 1 near the cabinet door 3, and the infrared gratings 4 are electrically connected to the integrated controller 6.

[0041] For details, please refer to Figure 2 The connecting slide 203 is vertically and symmetrically slidably inserted with guide rails 204 on the side near the switch cabinet 1. The guide rails 204 are all fixed to the same adjacent inner wall of the cover 200.

[0042] For details, please refer to Figure 5 Each of the vertical mounting plates 7 has a waist-shaped hole 71, and a fastening bolt 9 is slidably inserted into each waist-shaped hole 71. The fastening bolt 9 is threaded to the cabinet door 3 on the adjacent side.

[0043] For details, please refer to Figure 4 as well as Figure 5 Each cabinet door 3 is provided with a second magnet 12 on the upper part of one side inside the switch cabinet 1. Each switch cabinet 1 is provided with a mounting plate 10 on the side close to the second magnet 12. Each mounting plate 10 is provided with a first magnet 11 on the lower part of the side close to the second magnet 12 on the adjacent side. The first magnet 11 and the second magnet 12 on the adjacent side form a magnetic attraction effect.

[0044] Working principle: When in use, the operator approaches the switch cabinet 1, causing the infrared emission and reception of the infrared grating 4 to be interrupted. After the integrated controller 6 detects the working status of the infrared grating 4, it controls the cylinder 202 to retract upward through the solenoid valve. The piston rod of the cylinder 202 drives the connecting slide 203 to move upward along the guide rail 204. When the connecting slide 203 moves, it causes the locking pins 205 on both sides of the bottom to separate from the Z-shaped bending part 8. At this time, the cabinet door 3 can be pulled to open the switch cabinet 1.

[0045] When the work is completed, close the cabinet door 3. The cabinet door 3 drives the vertical mounting plate 7 and the Z-shaped bending part 8 to reset. After the Z-shaped bending part 8 resets, the monitoring end at the bottom of the proximity switch 5 detects a metal object. The integrated controller 6 detects the working state of the proximity switch 5 and controls the cylinder 202 to work again and extends its piston rod so that the locking pin 205 resets and engages with the Z-shaped bending part 8.

[0046] When the connecting slide 203 moves upward, it will drive the U-shaped pull rod 13 at the bottom to move upward synchronously. At this time, under the action of the hinge seat 16, one end of the lever 14 moves upward and the other end moves downward. At this time, the connecting rod 17 is pressed through the lever 14, causing the rack 18 to move along the guide rail 19. When the rack 18 moves, it drives the spur gear 20 to rotate. When the spur gear 20 rotates, it drives the bolt 22 to rotate through the rotating rod 21 and separates from the L-shaped bolt seat 23.

[0047] When installing the vertical mounting plate 7 on different cabinet doors 3, the installation position height of the Z-shaped bend 8 can be quickly adjusted by adjusting the connection position between the waist-shaped hole 71 and the fastening bolt 9.

[0048] When the cabinet door 3 is closed, the second magnet 12 on the inside of the cabinet door 3 attracts the first magnet 11 to prevent the cabinet door 3 from automatically opening due to external force after it is closed, and to ensure that the locking pin 205 is accurately inserted into the Z-shaped bend 8.

[0049] The proximity switches 5 are in pairs, and the infrared gratings 4 are set in pairs. Both the proximity switches 5 and the infrared gratings 4 are electrically connected to the integrated controller 6. When either the proximity switch 5 or the infrared grating 4 fails to meet the operating requirements, the integrated controller 6 will not issue an operating command to control the cylinder 202 to work.

[0050] The preferred model of the infrared grating 4 is SAS-602-C, the preferred model of the proximity switch 5 is PY-MD18NA, and the integrated controller 6 has built-in PLC control instructions. Since this electrical control method is a mature existing technology, it will not be elaborated on here.

[0051] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A pneumatic safety locking structure, comprising a switch cabinet (1) and a locking assembly (2), characterized in that, The switch cabinet (1) has cabinet doors (3) symmetrically hinged on one side of the opening. The locking assembly (2) includes a cover (200) located at the middle position of the upper part of the switch cabinet (1) near the cabinet door (3). The inner wall of the cover (200) near the switch cabinet (1) is provided with a mounting base (201) horizontally. A cylinder (202) is provided vertically at the bottom of the mounting base (201). The piston rod of the cylinder (202) slides through the bottom of the mounting base (201), and a connecting slide (203) is provided horizontally at the bottom. The two ends of the bottom of the connecting slide (203) are connected. A locking pin (205) is provided vertically, and the locking pin (205) slides through the bottom of the cover (200). The cabinet door (3) is provided with a vertical mounting plate (7) near the top. The upper part of the vertical mounting plate (7) away from the cabinet door (3) is welded with a Z-shaped bend (8). The bottom of the locking pin (205) slides through the Z-shaped bend (8) on the adjacent side near the cabinet door (3). A lever (14) is inserted at the middle position of the upper part of the switch cabinet (1). The lever (14) passes through both the switch cabinet (1) and the cover. The upper inner wall of the switch cabinet (1) is symmetrically provided with hinge seats (16), and the hinge seats (16) are all hinged to each other on the same lever (14). The bottom of the connecting slide (203) is provided with a U-shaped pull rod (13), and the lower part of the U-shaped pull rod (13) slides through the end of the lever (14). A straight slot (15) is opened at the intersection of the lever (14) and the U-shaped pull rod (13). The cabinet door (3) is provided with an L-shaped bolt seat (23) on one side inside the switch cabinet (1). The upper opening end of the L-shaped bolt seat (23) is provided with A bolting assembly for fixing the cabinet door (3) is provided; the bolting assembly includes bolt rods (22) that are slidably inserted into one end of the upper opening of the L-shaped bolt seat (23), and rotating rods (21) are inserted into the end of the bolt rods (22) away from the L-shaped bolt seat (23). The ends of the rotating rods (21) are rotatably connected to the inner wall of the switch cabinet (1) near the cabinet door (3). A spur gear (20) is sleeved on the end of the rotating rod (21) away from the cabinet door (3). A transmission assembly for controlling the rotation of the bolt rods (22) is provided on the side of the spur gears (20) near the inner wall of the switch cabinet (1). The transmission assembly includes a rack (18) that meshes with the spur gear (20) on the side close to the inner wall of the switch cabinet (1). Each rack (18) is slidably inserted with a slide rail (19) on the side away from the spur gear (20). Each slide rail (19) is fixed to the inner wall of an adjacent side inside the switch cabinet (1). Each rack (18) is provided with a combined drive assembly for controlling the synchronous rotation of the bolt (22). The combined drive assembly includes a connecting rod (17) that is laterally disposed on the upper part of the rack (18). The connecting rod (17) slides through the lever (14) at one end of the switch cabinet (1). A straight slot (15) is provided at the intersection of the lever (14) and the connecting rod (17). The connecting rod (17) is slidably inserted into the straight slot (15).

2. The pneumatic safety locking structure according to claim 1, characterized in that, The housing (200) is vertically symmetrically provided with proximity switches (5). The bottom monitoring end of the proximity switch (5) extends through the bottom of the housing (200) and forms a magnetic field induction with the top of the Z-shaped bend (8) on the adjacent side.

3. The pneumatic safety locking structure according to claim 2, characterized in that, The housing (200) is equipped with an integrated controller (6), which is electrically connected to a proximity switch (5). The cylinder (202) is connected to a solenoid valve through an air pipe, and the solenoid valve is electrically connected to the integrated controller (6).

4. The pneumatic safety locking structure according to claim 3, characterized in that, The switch cabinet (1) has infrared gratings (4) symmetrically arranged at both ends on the side near the cabinet door (3), and the infrared gratings (4) are electrically connected to the integrated controller (6).

5. A pneumatic safety locking structure according to claim 4, characterized in that, The connecting slide (203) is vertically and symmetrically slidably fitted with guide rails (204) on the side near the switch cabinet (1), and the guide rails (204) are all fixed to the same adjacent inner wall of the cover (200).

6. A pneumatic safety locking structure according to claim 5, characterized in that, Each of the vertical mounting plates (7) has a waist-shaped hole (71) vertically, and a fastening bolt (9) is slidably inserted inside the waist-shaped hole (71). The fastening bolt (9) is threaded to the cabinet door (3) on the adjacent side.

7. A pneumatic safety locking structure according to claim 6, characterized in that, Each cabinet door (3) is provided with a second magnet (12) on the upper part of one side inside the switch cabinet (1). Each switch cabinet (1) is provided with a mounting plate (10) on the side close to the second magnet (12) inside. Each mounting plate (10) is provided with a first magnet (11) on the lower part of the side close to the second magnet (12) on the adjacent side. The first magnet (11) and the second magnet (12) on the adjacent side form a magnetic attraction effect.

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