An electromagnetic shielding door

Abstract

The present invention relates to an electromagnetic shielding door, which comprises a door frame, a door leaf, two groups of double-axis hinge devices installed on the left sides of the door frame and the door leaf, and a door opening and closing device installed on the door frame and the door leaf; a state maintaining component and an initial angle adjustment component are arranged on the hinge device; the door opening and closing device comprises four groups of rollers fixedly installed on the door frame, an electric push rod, a connecting rod component and a groove cam; the present invention adopts a double-axis hinge device, and a rotating shaft A realizes the conventional horizontal opening function of the door leaf. When opening / locking, the rotating shaft A and the rotating shaft B are put into use at the same time; when closing the door, the door leaf rotates toward the door frame around the rotating shaft A, and when it rotates into place, the door leaf is parallel to the door frame and the knife spring is in an uncombined state. The door opening and closing device installed on the door leaf is operated, and the four groups of groove cams installed on the door leaf rotate synchronously and cooperate with the four rollers installed on the door frame respectively. The hinge rotating shaft A and the rotating shaft B are put into use at the same time, so that the door leaf and the door frame are synchronously combined, that is, the knife of the door leaf shielding component can be inserted horizontally, the knife and the spring are synchronously combined, and the door leaf is synchronously locked.

Description

Technical Field

[0001] The invention relates to an electromagnetic shielding door and belongs to the technical field of electromagnetic shielding. Background Art

[0002] Electromagnetic shielding doors (EMS) are a key component of an EMS room. They provide access for personnel and equipment while ensuring the room's shielding effectiveness. Due to space constraints and shielding effectiveness requirements, the most widely used type is a two-point locking EMS door. These feature a knife-spring sealed shielding structure and a swing-door design. These doors consist of a door frame, a leaf, two hinges, and two angled guide rail locking points. The hinges are single-axis, with a spring attached to the door frame and a blade attached to the leaf. The blade and spring combine to provide electromagnetic shielding.

[0003] When closing a conventional two-point electromagnetically shielded door, the blade and spring closest to the hinge engage first, gradually closing the door. When opening the door, the blade and spring away from the hinge separate first, gradually separating completely to allow the door to fully open. A two-point electromagnetically shielded door features an auxiliary opening / locking mechanism on the door leaf. This mechanism activates two sets of rollers and two locking points on the inclined guide rails to engage or disengage the blade on the door leaf and the spring on the door frame.

[0004] Due to the length limitation of the inclined guide rail locking point, conventional two-point locking electromagnetic shielding door hinges cannot achieve the synchronous engagement and separation of the blade on the door leaf and the spring on the door frame. When opening the door, only the blade spring near the inclined guide rail locking point is fully separated, while the blade spring near the hinge is still not separated. A small handle must be pulled, and a relatively large force (approximately 200N-400N) is required to truly open the electromagnetic shielding door. When closing the door, a person must push the door leaf with greater force (approximately 400N-600N), but this only ensures the engagement of the blade spring near the hinge, while the blade spring near the inclined guide rail locking point is still separated. The two sets of rollers in the auxiliary opening / locking mechanism on the door leaf must cooperate with the two inclined guide rail locking points to achieve complete engagement of the blade on the door leaf and the spring on the door frame to complete the door closing action. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an electromagnetic shielding door which can synchronize the insertion blade and the spring between the door leaf and the door frame and can open or close the door with less effort by the operator.

[0006] The present invention adopts the following technical solutions:

[0007] The present invention includes a door frame, a door leaf, two sets of double-axis hinge devices installed on the left side of the door frame and the door leaf, and a door opening and closing device installed on the door frame and the door leaf; a state maintaining component and an initial angle adjustment component are provided on the hinge device; the door opening and closing device includes four sets of rollers fixedly installed on the door frame, an electric push rod installed in the door leaf, a connecting rod component connected to the electric push rod, a transmission component connected to the connecting rod component, and a groove cam installed at the end of the transmission component and synchronously slidably connected to the corresponding rollers.

[0008] The double-axis hinge device described in the present invention includes a door frame chain plate fixedly installed on the left side of the door frame, a door leaf chain plate fixedly installed on the door leaf corresponding to the door frame chain plate, and an intermediate joint installed between the door frame chain plate and the door leaf chain plate; a rotating axis A is installed on the corresponding side of the door frame chain plate and the corresponding side of the intermediate joint, and a rotating axis B is installed on the corresponding side of the door leaf chain plate and the corresponding side of the intermediate joint; the intermediate joint includes a plate body, an axis hole A and an axis hole B arranged on both sides of the plate body, and a cylindrical countersunk hole arranged on the side of the plate body; a shoulder is arranged on the plate body at the upper end of the axis hole B; the rotating axis A is arranged in the axis hole A, and the rotating axis B is arranged in the axis hole B.

[0009] The state maintaining component of the present invention includes an angle limiting angle plate, a U-shaped limiting pressure plate and a compression spring; the U-shaped limiting pressure plate is located on the outside of the plate body and corresponds to the cylindrical countersunk hole, and the compression spring is arranged in the cylindrical countersunk hole; one side plate of the angle limiting angle plate is fixed to the side wall of the door chain plate, and the other side plate of the angle limiting angle plate is located on the inner side of the U-shaped limiting pressure plate, and the screw passes through the U-shaped limiting pressure plate, the angle limiting angle plate and the compression spring and is threadedly connected to the small hole of the cylindrical countersunk hole, and one end of the compression spring contacts the side wall of the angle limiting angle plate; under the action of the angle limiting angle plate and the compression spring, the door chain plate and the middle joint maintain the initial angle unchanged when the door is open; the initial angle adjustment component includes a top screw threadedly installed on the door chain plate, and the front end of the top screw contacts the outer side of the middle joint.

[0010] The present invention sets an upper shaft seat A and a lower shaft seat B on the side of the door frame chain plate away from the door leaf, and installs a first bearing seat in the lower shaft seat B. The upper end of the rotating shaft A is sleeved in the upper shaft seat A, and the lower end of the rotating shaft A is installed in the bearing seat A.

[0011] The present invention provides an upper shaft seat C and a lower shaft seat D at the installation location of the door leaf chain plate and the rotating shaft B, and a second bearing seat is fixedly installed on the shoulder. The upper end of the rotating shaft B is installed in the upper shaft seat C through the second bearing seat, and the lower end of the rotating shaft B is installed in the lower shaft seat D; screw holes are arranged at intervals between the upper shaft seat C and the lower shaft seat D, and the top screws are screwed into the screw holes.

[0012] The rollers described in the present invention include roller A and roller B installed at intervals on the left side frame of the door frame, and roller C and roller D installed at intervals on the right side frame; the rollers A and roller B are located between two sets of dual-axis hinge devices; the groove cams include groove cam A corresponding to roller A, groove cam B corresponding to roller B, groove cam C corresponding to roller C, and groove cam D corresponding to roller D; rollers A and roller C correspond to the left and right, and their axes are horizontally collinear; rollers B and roller D correspond to the left and right, and their axes are horizontally collinear.

[0013] The connecting rod assembly of the present invention includes a lever seat, a V-shaped lever, a transmission rod and a total transmission shaft; a door leaf frame is installed on the door leaf, an upper cross bar and a lower cross bar are fixedly installed at intervals in the left and right frames of the door leaf frame, and a parallel left vertical bar and a right vertical bar are vertically installed between the upper cross bar and the lower cross bar; the cylinder end of the electric push rod is installed on the left bottom surface of the upper cross bar through a support, the push rod of the electric push rod is set obliquely downward, and the lever seat is fixedly installed on the left top surface of the lower cross bar; the V-shaped lever is hinged in the lever seat, one end of the V-shaped lever is hinged to the rod end of the electric push rod, and the other end is hinged to the transmission rod, and the other end of the transmission rod is hinged to the total transmission shaft, the total transmission shaft gap passes through the left vertical bar and the right vertical bar, and a transition connecting plate is fixedly installed at the end of the total transmission shaft on the right side of the right vertical bar, and the transition connecting plate is connected to the transmission device.

[0014] The transmission assembly of the present invention comprises an upper transmission assembly hinged with the upper end of the transition connecting plate and a lower transmission assembly hinged with the lower end of the transition connecting plate; the upper transmission assembly comprises an upper oblique connecting rod, a vertically arranged upper transmission shaft, an upper rack and an upper connecting rod; one end of the upper oblique connecting rod is hinged with the upper end of the transition connecting plate, and the other end of the upper oblique connecting rod is hinged with the bottom of the upper transmission shaft, and the upper end of the upper transmission shaft is fixedly mounted with the upper rack; the lower transmission assembly comprises a lower oblique connecting rod, a vertically arranged lower transmission shaft, a lower rack and a lower connecting rod; one end of the lower oblique connecting rod is hinged with the transition connecting plate The lower end of the connecting plate is hinged, and the other end of the lower oblique connecting rod is hinged to the top of the lower transmission shaft, and the lower end of the lower transmission shaft is fixedly installed with the lower rack; the bearing seat A and the bearing seat B are installed at intervals in the left frame of the door frame, the cam shaft A is installed in the bearing seat A, and the cam shaft B is installed in the bearing seat B. The upper sleeve A and the upper sleeve B are fixedly installed at both ends of the cam shaft A respectively, and the groove cam A is fixedly installed on the outer end of the upper sleeve A, and the groove cam A opens upward and corresponds to the roller A, and the lower sleeve A and the lower sleeve B are fixedly installed at both ends of the cam shaft B respectively. Wheel B is fixedly installed on the outer end of the lower shaft sleeve A, and the groove cam B opens downward and corresponds to the roller B; the bearing seat C and the bearing seat D are installed at intervals in the right frame of the door frame, the camshaft C is installed in the bearing seat C, and the camshaft D is installed in the bearing seat D. The upper shaft sleeve C and the upper shaft sleeve D are fixedly installed on both ends of the camshaft C respectively, and the groove cam C is fixedly installed on the outer end of the upper shaft sleeve D. The groove cam C opens upward and corresponds to the roller C, and the lower shaft sleeve C and the lower shaft sleeve D are fixedly installed on both ends of the camshaft D respectively, and the groove cam D is fixedly installed on the outer end of the lower shaft sleeve D. The cam D opens downward and corresponds to the roller D; the upper connecting rod is fixedly installed between the upper sleeve B and the upper sleeve C; the lower connecting rod is fixedly installed between the lower sleeve B and the lower sleeve C; the upper rack seat and the lower rack seat are fixedly installed through the gaps of the upper sleeve C and the lower sleeve C on the left side of the right side frame of the door frame, an upper sliding groove for guiding the upper rack is provided on the rear side of the upper rack seat, and an upper gear meshing with the upper rack is fixedly installed on the upper sleeve C; a lower sliding groove for guiding the lower rack is provided on the rear side of the lower rack seat, and a lower gear meshing with the lower rack is fixedly installed on the lower sleeve C.

[0015] The groove cam of the present invention is in the shape of an arc groove provided inside the cam body, the width of the arc groove is greater than the diameter of the roller, the four cam bodies rotate synchronously, the arc groove slides along the corresponding roller, so that the door leaf and the door frame are locked and opened synchronously.

[0016] The present invention installs a manual switch mechanism on the main transmission shaft, and the manual switch mechanism includes a manual mounting frame fixedly installed between the left vertical rod and the right vertical rod with a gap passing through the main transmission shaft, a transverse rack fixedly installed on the top surface of the main transmission shaft, a manual rotating shaft installed on the manual mounting frame through a bearing, a gear A installed on the manual rotating shaft, and operating handles respectively fixedly installed at both ends of the manual rotating shaft. The transverse rack and the gear A are meshed and located in the manual mounting frame, and the operating handles are respectively located on the inner and outer sides of the door leaf.

[0017] The positive effects of the present invention are as follows: the electromagnetic shielding door of the present invention adopts four locking points, that is, two groove cams and corresponding rollers are arranged on the hinge side and the opposite side of the electromagnetic shielding door to form locking points. Under the action of the auxiliary opening / locking mechanism, the blade and the spring are synchronously separated and combined.

[0018] The present invention adopts a double-axis hinge device, in which the rotating shaft A realizes the conventional horizontal opening function of the door leaf. When opening / locking, the rotating shaft A and the rotating shaft B are put into use at the same time. When closing the door, the door leaf rotates around the rotating shaft A toward the door frame. When it rotates into place, the door leaf is parallel to the door frame and the knife spring is in an uncoupled state. The door opening and closing device installed on the door leaf is operated. The four sets of grooved cams installed on the door leaf rotate synchronously and cooperate with the four rollers installed on the door frame. The hinge rotating shaft A and the rotating shaft B are put into use at the same time, so that the door leaf and the door frame are synchronously coupled, that is, the knife of the door leaf shielding component can be inserted horizontally, and the knife and the spring are synchronously coupled to realize the synchronous locking of the door leaf. The top screw of the fine-tuning initial angle adjustment component adjusts the maintaining angle between the intermediate joint and the door leaf chain plate; the state maintaining component makes the door leaf and the intermediate joint maintain the initial angle unchanged when the door is opened and closed.

[0019] The electric push rod of the present invention drives the connecting rod assembly and the transmission assembly installed on the door leaf to move synchronously, so that the four groove cams rotate synchronously and cooperate with the corresponding rollers. The synchronous action realizes the synchronous connection and separation of the door leaf and the door frame, that is, the knife of the door leaf shielding component can be inserted and removed horizontally, and the knife and the spring are synchronously connected and separated to realize the locking and opening of the shielding door. The present invention has a reliable movement form, a compact structure, is reliable, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attachment Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Attachment Figure 2 Schematic diagram of the hinge device structure of the present invention;

[0022] Attachment Figure 3 This is a schematic diagram of the top view of the hinge device of the present invention;

[0023] Attachment Figure 4 This is a schematic diagram of the door frame chain plate structure of the present invention;

[0024] Attachment Figure 5 This is a schematic diagram of the intermediate joint structure of the present invention;

[0025] Attachment Figure 6 This is a schematic diagram of the door leaf chain plate structure of the present invention;

[0026] Attachment Figure 7 This is a schematic diagram of the cross-sectional structure of the installation of the rotating axis A and the rotating axis B of the present invention;

[0027] Attachment Figure 8 This is a schematic structural diagram of the door opening and closing device of the present invention;

[0028] Attachment Figure 9 Schematic diagram of the installation structure of the groove cam C of the present invention; Schematic diagram of the structure;

[0029] Attachment Figure 10 This is a schematic diagram of the manual switch structure of the present invention;

[0030] Attachment Figure 11 This is a schematic diagram of the groove cam structure of the present invention;

[0031] Attachment Figure 12 It is a schematic diagram of the matching structure of the groove cam and the roller corresponding to the present invention. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is described in detail below with reference to the accompanying drawings:

[0033] Example 1:

[0034] As attached Figure 1 、 2 As shown in Figures 8 and 12, the present invention includes a door frame 1, a door leaf 2, two sets of double-axis hinge devices installed on the left sides of the door frame 1 and the door leaf 2, and a door opening and closing device installed on the door frame 1 and the door leaf 2; a state maintaining component and an initial angle adjustment component are provided on the hinge device; the door opening and closing device includes four sets of rollers fixedly installed on the door frame 1, an electric push rod 200 installed in the door leaf 2, a connecting rod assembly connected to the electric push rod 200, a transmission assembly connected to the connecting rod assembly, and a groove cam installed at the end of the transmission assembly and synchronously slidingly connected to the corresponding rollers.

[0035] As attached Figure 2 、 3 As shown, the dual-axis hinge device of the present invention includes a door frame chain plate 3 fixedly installed on the left side of the door frame 1, a door leaf chain plate 4 fixedly installed on the door leaf 2 corresponding to the door frame chain plate 3, and an intermediate joint 5 installed between the door frame chain plate 3 and the door leaf chain plate 4; a rotation axis A61 is installed on the corresponding side of the door frame chain plate 3 and the corresponding side of the intermediate joint 5, and a rotation axis B62 is installed on the corresponding side of the door leaf chain plate 4 and the corresponding side of the intermediate joint 5; the rotation axis A61 and the rotation axis B62 are parallel.

[0036] As attached Figure 4 As shown, the present invention sets an upper shaft seat A31 and a lower shaft seat B32 on the side of the door frame chain plate 3 away from the door leaf, and installs a first bearing seat 33 in the lower shaft seat B32. The upper end of the rotating shaft A61 is sleeved in the upper shaft seat A31, and the lower end of the rotating shaft A61 is installed in the first bearing seat 33. The first bearing seat 33 can bear the weight of the door leaf 2.

[0037] As attached Figure 5 As shown, the intermediate joint 5 described in the present invention includes a plate body 51, an axial hole A52 and an axial hole B53 arranged on both sides of the plate body 51, and a cylindrical countersunk hole 54 arranged on the side of the plate body 51; a shoulder 55 is arranged on the plate body 51 at the upper end of the axial hole B53; the rotating axis A61 is arranged in the axial hole A52, and the rotating axis B62 is arranged in the axial hole B53.

[0038] As attached Figure 6 、 7 As shown, the present invention sets an upper shaft seat C41 and a lower shaft seat D42 at the installation position of the door leaf chain plate 4 and the rotating shaft B62, and fixes a second bearing seat 56 on the shoulder 55. The upper end of the rotating shaft B62 is installed in the upper shaft seat C41 through the second bearing seat 56, and the lower end of the rotating shaft B62 is installed in the lower shaft seat D42. By installing the second bearing seat 56, the friction force generated by the gravity of the door leaf 2 between the door leaf chain plate 4 and the middle joint 5 can be appropriately reduced, which saves effort when the door leaf 2 is opened and closed; the door leaf chain plate 4, the door frame chain plate 3 and the middle closing plate are fixed on the shoulder 55. The radial friction between the joint 5 and the rotating shaft can make the door leaf 2 stay at any position, preventing the door leaf from rotating on its own and causing unnecessary damage to people or objects; screw holes 43 are arranged at intervals between the upper shaft seat C41 and the lower shaft seat D42, and the initial angle adjustment component includes a top screw 11 threadedly installed in the screw hole 43 on the door leaf chain plate 4, and the front end of the top screw 11 contacts the outer side of the middle joint 5. The top screw 11 is fine-tuned to adjust the angle between the middle joint 5 and the door leaf chain plate 4, so that the door leaf can remain parallel to the door frame after it is in place when closing the door.

[0039] As attached Figure 2 、 3As shown, the state maintaining component of the present invention includes an angle limiting angle plate 7, a U-shaped limiting pressure plate 8 and a compression spring 9; the U-shaped limiting pressure plate 8 is located on the outside of the plate body 51 and corresponds to the cylindrical countersunk hole 54, and the compression spring 9 is arranged in the cylindrical countersunk hole 54; the two side plates of the angle limiting angle plate 7 are perpendicular; one side plate of the angle limiting angle plate 7 is fixed to the side wall of the door chain plate 4, and the other side plate of the angle limiting angle plate 7 is located on the inner side of the U-shaped limiting pressure plate 8, and the screw 10 passes through the U-shaped limiting pressure plate 8, the angle limiting angle plate 7 and the compression spring 9 and is threadedly connected to the small hole of the cylindrical countersunk hole 54, and one end of the compression spring 9 contacts the side wall of the angle limiting angle plate 7; the screw 10 can fix the U-shaped limiting pressure plate 8 and maintain the variation range of the center position of the compression spring 9. Under the action of the angle limiting angle plate 7 and the compression spring 9, the door chain plate 4 and the middle joint 5 maintain the initial angle unchanged when the door is open.

[0040] As attached Figure 1 、 8 As shown, the rollers of the present invention include rollers A101 and B102 installed at intervals on the left side frame of the door frame 1, and rollers C103 and D104 installed at intervals on the right side frame; the rollers A101 and B102 are located between two sets of biaxial hinge devices; the groove cams include groove cams A201 corresponding to roller A101, groove cams B202 corresponding to roller B102, groove cams C203 corresponding to roller C103, and groove cams D104 corresponding to rollers A101 and B102. Corresponding groove cam D204; groove cam A201, groove cam B202, groove cam C203 and groove cam D204 rotate synchronously by 110° with a long stroke, realizing synchronous engagement and separation of the insert knife and the spring leaf, so that the door leaf is locked and opened synchronously on all sides; roller A101 and roller C103 correspond to each other on the left and right, and their axes are horizontally collinear; roller B102 and roller D104 correspond to each other on the left and right, and their axes are horizontally collinear; when opening and closing the door, the groove cams are ensured to rotate synchronously along the rollers.

[0041] As attached Figure 8 、 11 As shown, the shapes of the groove cams of the present invention are the same, and the groove cam A201 and the groove cam C203 are symmetrically arranged, and the groove cam B202 and the groove cam D204 are symmetrically arranged; the groove cam A201 and the groove cam B202 are symmetrically arranged, and the groove cam C203 and the groove cam D204 are symmetrically arranged; the shape of the groove cam is that an arc groove 235 is arranged on the inner side of the cam body 229, and the width of the arc groove 235 is greater than the diameter of the roller, and the four cam bodies 229 rotate synchronously, and the arc grooves 235 cooperate with each other along the corresponding rollers, so that the door leaf 2 and the door frame 1 are locked and opened synchronously.

[0042] As attached Figure 1 、 8, 9, 11, 12, the connecting rod assembly of the present invention includes a lever seat 210, a V-shaped lever 211, a transmission rod 212 and a total transmission shaft 213; a door frame 205 is installed on the door leaf 2, and an upper cross bar 206 and a lower cross bar 207 are fixedly installed at intervals in the left and right frames of the door frame 205, and a parallel left vertical bar 208 and a right vertical bar 209 are vertically installed between the upper cross bar 206 and the lower cross bar 207; the cylinder end of the electric push rod 200 is installed on the left bottom surface of the upper cross bar 206 through a support, the push rod of the electric push rod 200 is set obliquely downward, and the lever seat 210 is fixedly installed on the left top surface of the lower cross bar 207; the V-shaped lever 211 is hinged in the lever seat 210, and one end of the V-shaped lever 211 is connected to the electric push rod The rod end of 200 is hinged, and the other end is hinged to the transmission rod 212. The other end of the transmission rod 212 is hinged to the main transmission shaft 213. The main transmission shaft 213 passes through the left vertical rod 208 and the right vertical rod 209. A transition connecting plate 214 is fixedly installed at the end of the main transmission shaft 213 on the right side of the right vertical rod 209; the transmission assembly includes an upper transmission assembly hinged to the upper end of the transition connecting plate 214 and a lower transmission assembly hinged to the lower end of the transition connecting plate 214; when the electric push rod 200 is started, the rod end of the electric push rod 200 pulls the V-shaped lever 211 to rotate, and the upper end of the V-shaped lever 211 drives the main transmission shaft 213 to pull the transition connecting plate 214 to move to the left; the transition connecting plate 214 drives the upper transmission assembly and the lower transmission assembly to move synchronously;

[0043] The upper transmission assembly includes an upper oblique link 215, a vertically arranged upper transmission shaft 216, an upper rack 217, and an upper connecting rod 225; one end of the upper oblique link 215 is hinged to the upper end of the transition connecting plate 214, and the other end of the upper oblique link 215 is hinged to the bottom of the upper transmission shaft 216. The upper end of the upper transmission shaft 216 is fixedly mounted with the upper rack 217, and the upper transmission shaft 216 passes through the upper cross bar 206; the upper oblique link 215 pulls the upper rack 217 downward through the upper transmission shaft 216 to move;

[0044] The lower transmission assembly includes a lower oblique link 218, a vertically arranged lower transfer shaft 219, a lower rack 220, and a lower link 226; one end of the lower oblique link 218 is hinged to the lower end of the transition connecting plate 214, and the other end of the lower oblique link 218 is hinged to the top of the lower transfer shaft 216. The lower end of the lower transfer shaft 219 is fixedly mounted with the lower rack 220, and the lower transfer shaft 216 passes through the lower cross bar 207; the lower oblique link 218 pulls the lower rack 220 upward through the lower transfer shaft 216 to move;

[0045] Bearing seat A and bearing seat B are installed at intervals in the left frame of the door leaf frame 205, camshaft A is installed in bearing seat A, camshaft B is installed in bearing seat B, upper shaft sleeves A and upper shaft sleeves B are fixedly installed at both ends of camshaft A, the groove cam A201 is fixedly installed at the outer end of the upper shaft sleeve A, and the groove cam A201 opens upward and corresponds to the roller A101, and lower shaft sleeves A and lower shaft sleeves B are fixedly installed at both ends of camshaft B, the groove cam B202 is fixedly installed at the outer end of the lower shaft sleeve A, and the groove cam B202 opens downward and corresponds to the roller B102;

[0046] The bearing seat C221 and the bearing seat D are installed at intervals in the right frame of the door frame 205, the cam shaft C222 is installed in the bearing seat C221, and the cam shaft D is installed in the bearing seat D. The upper sleeve C223 and the upper sleeve D224 are fixedly installed at both ends of the cam shaft C222, and the groove cam C203 is fixedly installed on the outer end of the upper sleeve D224, and the groove cam C203 opens upward and corresponds to the roller C103. The lower sleeve C and the lower sleeve D are fixedly installed at both ends of the cam shaft D, and the groove cam D204 is fixedly installed on the outer end of the lower sleeve D, and the groove cam D204 opens downward and corresponds to the roller D104; the upper connecting rod 225 is fixedly installed between the upper sleeve B and the upper sleeve C223; the lower connecting rod 226 is fixedly installed between the lower sleeve B and the lower sleeve C; the upper sleeve C223 and the lower sleeve C are respectively passed through the gap on the left side of the right frame of the door frame 205. The shaft sleeve C is fixedly mounted on the upper rack seat 227 and the lower rack seat, and an upper slide groove for guiding the upper rack 217 is provided on the rear side of the upper rack seat 227. The upper gear 228 meshing with the upper rack 217 is fixedly mounted on the upper shaft sleeve C223; the upper rack 217 drives the upper gear 228 to rotate, so that the upper connecting rod 225 drives the groove cam A201 with the opening upward to rotate along the roller A101, and the groove cam C203 with the opening upward to rotate along the roller C1 03 rotates, the arc groove 235 slides along the corresponding roller, a lower sliding groove for guiding the lower rack is set on the rear side of the lower rack seat, and the lower gear engaged with the lower rack 220 is fixedly installed on the lower shaft sleeve C. The lower rack drives the lower gear to rotate, so that the lower connecting rod 226 drives the groove cam B202 with the opening downward to rotate along the roller B102, and the groove cam D204 with the opening downward to rotate along the roller D104, and the arc groove 235 slides along the corresponding roller.

[0047] Through the above operation, it is ensured that the groove cam rotates along the roller synchronously, so that the door leaf 2 is locked and opened to the door frame 1 synchronously.

[0048] Example 2:

[0049] The difference between this embodiment and the first embodiment is: Figure 1 、 10As shown, the present invention installs a manual switch mechanism on the main transmission shaft 213. The manual switch mechanism includes a manual mounting bracket 230 fixedly mounted between the left vertical rod 208 and the right vertical rod 209 with a gap passing through the main transmission shaft 213, a transverse rack 231 fixedly mounted on the top surface of the main transmission shaft 213, a manual rotating shaft 232 mounted on the manual mounting bracket 230 via a bearing, a gear A233 mounted on the manual rotating shaft 232, and operating handles 234 fixedly mounted on both ends of the manual rotating shaft 232. The transverse rack 231 and gear A233 are engaged and located within the manual mounting bracket 230. The operating handles 234 are respectively located on the inner and outer sides of the door leaf 2. When the electric push rod is not activated, manually rotating the operating handle 234 synchronizes the movement through the connecting rod assembly and the transmission assembly, causing the groove cam to rotate 110 degrees synchronously and then slide into connection with the roller, thereby achieving synchronous engagement and separation of the door leaf 2 and the door frame 1.

[0050] The middle joint of the dual-axis hinge device of the present invention rotates toward the door frame through the rotating axis A61 on the door frame chain plate 3, and the door leaf 2 rotates toward the door frame through the middle joint 5 and the rotating axis B62 on the door leaf chain plate 4. After the door leaf 2 and the door frame 1 are parallel, the electric push rod drives the connecting rod assembly and the transmission assembly installed on the door leaf to move synchronously, so that the groove cam rotates synchronously and is slidably connected with the roller, thereby realizing the synchronous connection and separation of the door leaf and the door frame, that is, the knife of the door leaf shielding component can be horizontally inserted and exited, and the knife and the spring are synchronously combined and separated to realize the locking and opening of the shielding door; fine-tune the top screw 8 of the initial angle adjustment component to maintain the angle between the middle joint 5 and the door leaf chain plate 4, and twist the screw 10 of the state holding component to adjust the tightness of the compression spring 9, so that the door leaf 2 maintains a stable angle when opening and closing the door. The knife spring shielding sealing structure adopted in the present invention is a well-known technology in the industry and will not be described here.

[0051] The electromagnetic shielding door of the present invention adopts four locking points, namely, two groove cams and corresponding roller sliding locking points are arranged on the hinge side and the opposite side of the electromagnetic shielding door respectively. Under the action of the auxiliary opening / locking mechanism, the blade and the spring are synchronously separated and combined.

[0052] The electric push rod of the present invention drives the connecting rod assembly and the transmission assembly installed on the door leaf to move synchronously, so that the four groove cams rotate synchronously and cooperate with the corresponding rollers. The synchronous action realizes the synchronous connection and separation of the door leaf and the door frame, that is, the knife of the door leaf shielding component can be inserted and removed horizontally, and the knife and the spring are synchronously connected and separated to realize the locking and opening of the shielding door. The present invention has a reliable movement form, a compact structure, is reliable, and has good application prospects.

[0053] Finally, it should be noted that the embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electromagnetic shielding door, characterized in that: It comprises a door frame (1), a door leaf (2), two sets of biaxial hinge devices installed on the left sides of the door frame (1) and the door leaf (2), and a door opening and closing device installed on the door frame (1) and the door leaf (2); a state maintaining component and an initial angle adjustment component are provided on the biaxial hinge device; The door opening and closing device comprises four sets of rollers fixedly mounted on the door frame (1), an electric push rod (200) mounted in the door leaf (2), a connecting rod assembly connected to the electric push rod (200), a transmission assembly connected to the connecting rod assembly, and a groove cam mounted at the end of the transmission assembly and synchronously slidingly engaged with the corresponding rollers; The rollers include roller A (101) and roller B (102) installed at intervals on the left side frame of the door frame (1), and roller C (103) and roller D (104) installed at intervals on the right side frame; the rollers A (101) and roller B (102) are located between two sets of biaxial hinge devices; The groove cams include a groove cam A (201) corresponding to the roller A (101), a groove cam B (202) corresponding to the roller B (102), a groove cam C (203) corresponding to the roller C (103), and a groove cam D (204) corresponding to the roller D (104); Roller A (101) and roller C (103) are located on the left and right sides respectively, and their axes are horizontally collinear; Roller B (102) and roller D (104) are located on the left and right sides respectively, and their axes are horizontally collinear; The connecting rod assembly includes a lever seat (210), a V-shaped lever (211), a transmission rod (212) and a main transmission shaft (213); A door leaf frame (205) is installed on the door leaf (2), an upper cross bar (206) and a lower cross bar (207) are fixedly installed at intervals in the left and right frames of the door leaf frame (205), and a parallel left vertical bar (208) and a right vertical bar (209) are vertically installed between the upper cross bar (206) and the lower cross bar (207); the cylinder end of the electric push rod (200) is installed on the left bottom surface of the upper cross bar (206) through a support, the push rod of the electric push rod (200) is set obliquely downward, and the lever seat (210) is fixedly installed on the left top surface of the lower cross bar (207); The V-shaped lever (211) is hinged in the lever seat (210), one end of the V-shaped lever (211) is hinged to the rod end of the electric push rod (200), and the other end is hinged to the transmission rod (212), and the other end of the transmission rod (212) is hinged to the total transmission shaft (213), and the total transmission shaft (213) passes through the left vertical rod (208) and the right vertical rod (209) in a gap, and a transition connecting plate (214) is fixedly installed at the end of the total transmission shaft (213) on the right side of the right vertical rod (209), and the transition connecting plate (214) is connected to the transmission assembly.

2. The electromagnetic shielding door according to claim 1, characterized in that: The biaxial hinge device comprises a door frame chain plate (3) fixedly mounted on the left side of the door frame (1), a door leaf chain plate (4) fixedly mounted on the door leaf (2) in correspondence with the door frame chain plate (3), and an intermediate joint (5) mounted between the door frame chain plate (3) and the door leaf chain plate (4); a rotation axis A (61) is mounted on the corresponding side of the door frame chain plate (3) and the corresponding side of the intermediate joint (5), and a rotation axis B (62) is mounted on the corresponding side of the door leaf chain plate (4) and the corresponding side of the intermediate joint (5); The intermediate joint (5) comprises a plate body (51), an axial hole A (52) and an axial hole B (53) provided on both sides of the plate body (51), and a cylindrical countersunk hole (54) provided on the side of the plate body (51); a shoulder (55) is provided on the plate body (51), and the shoulder (55) is located at the upper end of the axial hole B (53); The rotating shaft A (61) is arranged in the shaft hole A (52), and the rotating shaft B (62) is arranged in the shaft hole B (53).

3. The electromagnetic shielding door according to claim 2, characterized in that: The state maintaining component comprises an angle limiting angle plate (7), a U-shaped limiting pressure plate (8) and a compression spring (9); the U-shaped limiting pressure plate (8) is located outside the plate body (51) and corresponds to the cylindrical countersunk hole (54), and the compression spring (9) is arranged in the cylindrical countersunk hole (54); One side plate of the angle limiting angle plate (7) is fixed to the side wall of the door leaf chain plate (4), and the other side plate of the angle limiting angle plate (7) is located inside the U-shaped limiting pressure plate (8). The screw (10) passes through the U-shaped limiting pressure plate (8), the angle limiting angle plate (7) and the compression spring (9) and is threadedly connected to the small hole of the cylindrical countersunk hole (54). One end of the compression spring (9) contacts the side wall of the angle limiting angle plate (7). Under the action of the angle limiting angle plate (7) and the compression spring (9), the door leaf chain plate (4) and the intermediate joint (5) maintain an initial angle unchanged when the door is in the open state. The initial angle adjustment assembly comprises a top screw (11) threadedly mounted on the door leaf chain plate (4), wherein the front end of the top screw (11) contacts the outer side of the middle joint (5).

4. The electromagnetic shielding door according to claim 3, characterized in that: An upper shaft seat A (31) and a lower shaft seat B (32) are provided on the door frame chain plate (3) away from the door leaf, and a first bearing seat (33) is installed in the lower shaft seat B (32). The upper end of the rotating shaft A (61) is sleeved in the upper shaft seat A (31), and the lower end of the rotating shaft A (61) is installed in the first bearing seat (33).

5. The electromagnetic shielding door according to claim 4, characterized in that: An upper shaft seat C (41) and a lower shaft seat D (42) are provided at the mounting position of the door leaf chain plate (4) and the rotating shaft B (62), a second bearing seat (56) is fixedly mounted on the shoulder (55), the upper end of the rotating shaft B (62) is mounted in the upper shaft seat C (41) through the second bearing seat (56), and the lower end of the rotating shaft B (62) is mounted in the lower shaft seat D (42); Screw holes (43) are arranged at intervals between the upper shaft seat C (41) and the lower shaft seat D (42), and the top screw (11) is screwed into the screw hole (43).

6. The electromagnetic shielding door according to claim 1, characterized in that: The transmission assembly comprises an upper transmission assembly hinged to the upper end of the transition connecting plate (214) and a lower transmission assembly hinged to the lower end of the transition connecting plate (214); The upper transmission assembly includes an upper oblique connecting rod (215), a vertically arranged upper transmission shaft (216), an upper rack (217) and an upper connecting rod (225); one end of the upper oblique connecting rod (215) is hinged to the upper end of the transition connecting plate (214), and the other end of the upper oblique connecting rod (215) is hinged to the bottom of the upper transmission shaft (216); the upper end of the upper transmission shaft (216) is fixedly mounted with the upper rack (217); The lower transmission assembly includes a lower oblique connecting rod (218), a vertically arranged lower transmission shaft (219), a lower rack (220), and a lower connecting rod (226); one end of the lower oblique connecting rod (218) is hinged to the lower end of the transition connecting plate (214), the other end of the lower oblique connecting rod (218) is hinged to the top of the lower transmission shaft (219), and the lower end of the lower transmission shaft (219) is fixedly mounted with the lower rack (220); A bearing seat A and a bearing seat B are installed at intervals in the left frame of the door leaf frame (205), a cam shaft A is installed in the bearing seat A, and a cam shaft B is installed in the bearing seat B. An upper sleeve A and an upper sleeve B are fixedly installed at both ends of the cam shaft A, respectively. The groove cam A (201) is fixedly installed at the outer end of the upper sleeve A, and the groove cam A (201) opens upward and corresponds to the roller A (101). A lower sleeve A and a lower sleeve B are fixedly installed at both ends of the cam shaft B, respectively. The groove cam B (202) is fixedly installed at the outer end of the lower sleeve A, and the groove cam B (202) opens downward and corresponds to the roller B (102). A bearing seat C (221) and a bearing seat D are installed at intervals in the right frame of the door leaf frame (205), a cam shaft C (222) is installed in the bearing seat C (221), and a cam shaft D is installed in the bearing seat D. An upper sleeve C (223) and an upper sleeve D (224) are fixedly installed at both ends of the cam shaft C (222), and the groove cam C (203) is fixedly installed at the outer end of the upper sleeve D (224), and the groove cam C (203) opens upward and corresponds to the roller C (103). A lower sleeve C and a lower sleeve D are fixedly installed at both ends of the cam shaft D, and the groove cam D (204) is fixedly installed at the outer end of the lower sleeve D, and the groove cam D (204) opens downward and corresponds to the roller D (104). The upper connecting rod (225) is fixedly installed between the upper shaft sleeve B and the upper shaft sleeve C (223); The lower connecting rod (226) is fixedly installed between the lower shaft sleeve B and the lower shaft sleeve C; An upper rack seat (227) and a lower rack seat are fixedly installed on the left side of the right frame of the door leaf frame (205) through the upper sleeve C (223) and the lower sleeve C respectively, and an upper slide groove for guiding the upper rack (217) is provided on the rear side of the upper rack seat (227). An upper gear (228) meshing with the upper rack (217) is fixedly installed on the upper sleeve C (223); A lower groove for guiding the lower rack is provided on the rear side of the lower rack seat, and a lower gear meshing with the lower rack (220) is fixedly mounted on the lower sleeve C.

7. The electromagnetic shielding door according to claim 1, characterized in that: The shape of the groove cam is that an arc groove (235) is provided on the inner side of the cam body (229), and the width of the arc groove (235) is greater than the diameter of the roller. The four cam bodies (229) rotate synchronously, and the arc groove (235) slides along the corresponding roller, so that the door leaf (2) and the door frame (1) are locked and opened synchronously.

8. The electromagnetic shielding door according to claim 1, characterized in that: A manual switch mechanism is mounted on the main transmission shaft (213), the manual switch mechanism comprising a manual mounting frame (230) fixedly mounted between a left vertical rod (208) and a right vertical rod (209) with a gap passing through the main transmission shaft (213), a transverse rack (231) fixedly mounted on the top surface of the main transmission shaft (213), a manual rotating shaft (232) mounted on the manual mounting frame (230) via a bearing, a gear A (233) mounted on the manual rotating shaft (232), and operating handles (234) respectively fixedly mounted on both ends of the manual rotating shaft (232), the transverse rack (231) and the gear A (233) being engaged and located in the manual mounting frame (230), and the operating handles (234) respectively located on the inner and outer sides of the door leaf (2).

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