Door opening and closing device of heavy anti-knock door
By adopting improved hinge components and latch mechanisms on heavy-duty explosion-proof doors, the problems of poor hinge accuracy and latch opening and closing in the prior art are solved, and the effects of high precision, low friction resistance and labor-saving opening and closing are achieved.
Patent Information
- Application Number
- CN202421746566.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The hinge structure of existing heavy-duty explosion-resistant doors has poor accuracy, high friction resistance, and large door opening and closing torque; the latch structure is time-consuming and labor-intensive, requires a large force and a long time, and it is impossible to open and close two latches at the same time, which is prone to inadequate locking.
Two sets of hinge components and latch mechanisms are used to set spaces. The hinge components achieve rolling friction through rotating arms, radial bearings and thrust bearings. The latch mechanism achieves synchronous opening and closing through gearbox, chain plate and plug assembly, and the lever principle and wedge-shaped slider achieve labor-saving opening and closing and accurate locking of latches.
It improves the opening and closing accuracy of the hinge, reduces friction resistance, and reduces the torque of the door opening and closing; realizes the labor-saving opening and closing of the pin and fast locking, improves the operating efficiency and reduces labor intensity.
Smart Images
Figure CN222949725U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a door opening and closing device for a heavy-duty explosion-proof door. Background Art
[0002] Explosion-proof doors are widely used in explosion-proof rooms, explosive warehouses and other places. Due to the requirements of their explosion-proof characteristics, explosion-proof doors are generally heavy. The opening and closing hinges of existing heavy-duty armored doors on the market usually adopt a sleeve shaft structure, that is, the hinge shaft and the sleeve move through sliding friction. Such a structure has high friction and poor positioning accuracy; the bolt plays the role of locking the heavy-duty explosion-proof door. In order to meet the requirements of explosion impact force, a double bolt structure is generally adopted, but the bolt has a large diameter and weight, and manual insertion and removal of the bolt is time-consuming and labor-intensive, and the labor intensity is very high.
[0003] The current problems with the hinge and latch mechanisms of heavy-duty explosion-proof doors in China are: 1) The traditional hinge adopts a shaft and sleeve structure, and the hinge opening and closing accuracy is poor; 2) The shaft and sleeve of the traditional hinge are sliding friction motion, the friction resistance is large, and the door opening and closing torque is large; 3) The traditional latch opening and closing form generally adopts gear rack to drive the latch to open and close, or manually directly drives the latch to open and close, which requires a large force and a long time to open and close; 4) The traditional latch structure cannot open and close two latches at the same time, and it takes two operations to complete the opening and closing of the two latches, which is time-consuming and labor-intensive; 5) The traditional latch structure has no feedback on the latch being in place, and it is easy for the latch to not lock in place. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a door opening and closing device for a heavy-duty explosion-proof door which has a high opening and closing hinge precision and can be locked quickly.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] The utility model comprises a hinge assembly installed between one side of a heavy-duty explosion-proof door and a corresponding door frame on one side, and a latch mechanism installed on the other side of the heavy-duty explosion-proof door; the hinge assembly is divided into two groups arranged at intervals; the latch mechanism comprises a drive assembly installed on the heavy-duty explosion-proof door, a chain plate symmetrically arranged and one end of which is connected to the drive assembly, and a plug-in assembly installed at the other end of each chain plate, the two groups of plug-in assemblies are symmetrically arranged, and the chain plate is hinged to the heavy-duty explosion-proof door surface.
[0007] The hinge assembly of the utility model comprises a rotating arm with one end fixedly mounted on one side of a heavy-duty explosion-proof door, an upper hinge support located above the movable end of the rotating arm and mounted on the door frame, a lower hinge support located below the movable end of the rotating arm and mounted on the door frame, and a rotating shaft fixedly mounted in the hole of the rotating arm; radial bearings are respectively mounted in the upper hinge support and the lower hinge support, and a thrust bearing is mounted on the lower shaft shoulder of the radial bearing in the lower hinge support; the upper and lower end journals of the rotating shaft are respectively correspondingly mounted in the radial bearings.
[0008] The drive assembly of the utility model comprises a gear box fixedly mounted on the inner side of the heavy-duty explosion-proof door, a first bevel gear and a second bevel gear mounted in the gear box and meshing at right angles, a transmission shaft connected to the first bevel gear through a coupling, an operating member mounted on the outer end of the transmission shaft, a lead screw threadedly connected to the inner hole of the second bevel gear, and a double-ear slider fixedly mounted on the outer end of the lead screw, and two chain plates are symmetrically hinged on the upper and lower ends of the double-ear slider; the transmission shaft passes through the outer wall of the gear box and the heavy-duty explosion-proof door body, and the operating member is arranged on the outside of the heavy-duty explosion-proof door.
[0009] The plug-in assembly of the utility model comprises a latch support fixedly mounted on one side of the heavy explosion-proof door and corresponding to the end of the chain plate, a socket mounted on the door frame and a latch laterally hinged to the end of the chain plate, both ends of the chain plate are oblong holes, the socket is located outside the latch support and corresponds to the latch support, the inner holes of the latch support and the socket are coaxial; the latch gap passes through the inner holes of the latch support and the socket.
[0010] The utility model has a wedge-shaped sliding block installed on the door frame corresponding to the inner hole of the socket, a pressure spring installed on the end of the wedge-shaped sliding block, and a travel switch installed on the door frame above the wedge-shaped sliding block.
[0011] The utility model has an upper pressure cover installed on the top of the upper hinge support, a lower pressure cover installed on the shaft hole end of the lower hinge support, and a top sleeve of the lower pressure cover is connected with a lower track ring of the thrust bearing.
[0012] The operating part of the utility model is a hand wheel.
[0013] The inner holes of the plug support and the socket of the utility model are equipped with oil-free graphite bushings, and the plug passes through the oil-free graphite bushings.
[0014] The positive effects of the utility model are as follows: the transmission shaft of the utility model drives the first bevel gear to rotate, so that the second bevel gear rotates and drives the lead screw to perform linear telescopic motion, and the lead screw pushes the two chain plates through the double-ear slider to drive the two latches to open and close synchronously, and the effort-saving opening and closing of the latch is realized through the lever principle; after opening and closing, the heavy-duty explosion-proof door drives the rotating arm and the rotating shaft to rotate synchronously, and the rotating shaft drives the inner and outer rings of the bearing to rotate relative to each other in the upper hinge support and the lower hinge support, thereby converting the traditional sliding friction into the rolling friction of the bearing; after the latch pushes the wedge-shaped slider to move, the wedge-shaped surface gradually rises to trigger the travel switch action, which can accurately feedback the opening and closing state of the latch and lock the latch in place.
[0015] The utility model is easy to operate, saves time and labor, and greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Attached Figure 1 It is a schematic diagram of the structure of the utility model;
[0017] Attached Figure 2 This is a schematic diagram of the side view of the latch mechanism of the utility model;
[0018] Attached Figure 3 This is a schematic cross-sectional view of the latch mechanism of the utility model;
[0019] Attached Figure 4 This is a schematic cross-sectional view of the hinge assembly of the utility model;
[0020] Attached Figure 5 This is a schematic diagram of the structure of the hinge assembly of the utility model from a top view;
[0021] Attached Figure 6 It is a partial structural schematic diagram of the latch mechanism of the utility model.
[0022] In the accompanying drawings, 1 is a hinge assembly; 101 is an upper hinge support; 102 is a lower hinge support; 103 is a radial bearing; 104 is a thrust bearing; 2 is a rotating arm; 3 is a rotating shaft; 41 is an upper pressure cover; 42 is a lower pressure cover; 5 is a hand wheel; 6 is a transmission shaft; 7 is a gear box; 8 is a first bevel gear; 9 is a second bevel gear; 10 is a lead screw; 11 is a double-ear slider; 12 is a chain plate; 13 is a pin; 14 is a latch; 15 is a latch support; 16 is a socket; 17 is a wedge-shaped slider; 18 is a travel switch; and 19 is a pressure spring. DETAILED DESCRIPTION
[0023] As attached Figure 1-6As shown, the utility model includes a hinge assembly 1 installed between one side of the heavy-duty explosion-proof door and a corresponding side door frame, and a latch mechanism installed on the other side of the heavy-duty explosion-proof door; the hinge assembly is divided into two groups arranged at intervals; the latch mechanism includes a drive assembly installed on the front of the heavy-duty explosion-proof door, a chain plate 12 symmetrically arranged and one end of which is connected to the drive assembly, and a plug-in assembly installed on the other end of each chain plate 12, the two groups of plug-in assemblies are symmetrically arranged, and the chain plate 12 is hinged to a pin shaft 13 installed on the heavy-duty explosion-proof door surface approximately in the middle.
[0024] The hinge assembly of the utility model comprises a rotating arm 2 with one end fixedly mounted on one side of a heavy-duty explosion-proof door, an upper hinge support 101 located above the movable end of the rotating arm 2 and mounted on the door frame, a lower hinge support 102 located below the movable end of the rotating arm 2 and mounted on the door frame, and a rotating shaft 3 fixedly mounted in the hole of the rotating arm 2; radial bearings 103 are respectively mounted in the upper hinge support 101 and the lower hinge support 102, and a thrust bearing 104 is mounted on the lower shaft shoulder of the radial bearing 103 in the lower hinge support 102; an upper pressure cover 41 is mounted on the top of the upper hinge support 101, and a lower pressure cover 42 is mounted on the shaft hole end of the lower hinge support 102, and the top sleeve of the lower pressure cover 42 is connected to the lower track ring of the thrust bearing 104.
[0025] The journal positions of the upper and lower ends of the rotating shaft 3 of the utility model are respectively installed in the radial bearing 103 and the thrust bearing 104 correspondingly, and are used to bear the vertical gravity and overturning force of the heavy explosion-proof door.
[0026] The utility model comprises a new driving assembly which is fixedly mounted on the inner side of the heavy-duty explosion-proof door, a first bevel gear 8 and a second bevel gear 9 which are mounted in the gear box 7 and meshed at right angles, a transmission shaft 6 which is connected to the first bevel gear 8 via a coupling, an operating member 5 which is mounted on the outer end of the transmission shaft 6, a lead screw 10 which is threadedly connected to the inner hole of the second bevel gear 9, and a double-ear slider 11 which is fixedly mounted on the outer end of the lead screw 10, and two chain plates 12 which are symmetrically hinged on the upper and lower ends of the double-ear slider 11; the second bevel gear 9 and the lead screw 10 form a lead screw nut kinematic pair, and the rotation of the second bevel gear 9 can drive the lead screw 10 to perform linear telescopic motion; the transmission shaft 6 passes through the outer wall of the gear box 7 and the heavy-duty explosion-proof door body, and the operating member 5 is arranged on the outer side of the heavy-duty explosion-proof door; the operating member 5 is specifically a hand wheel.
[0027] The plug-in assembly of the utility model comprises a latch support 15 fixedly mounted on one side of the heavy explosion-proof door and corresponding to the end of the chain plate 12, a socket 16 mounted on the door frame, and a latch 14 hinged transversely to the end of the chain plate 12. Both ends of the chain plate 12 are oblong holes, ensuring that when the chain plate 12 rotates around the pin shaft 13, the two ends of the chain plate 12 move in a circular motion, thereby driving the latch 14 to move horizontally forward and backward. The socket 16 is located outside the latch support 15 and corresponds to the latch support 15. The inner holes of the latch support 15 and the socket 16 are coaxial; the latch 14 passes through the inner holes of the latch support 15 and the socket 16. Furthermore, an oil-free graphite bushing is installed in the inner holes of the latch support 15 and the socket 16. The latch 14 passes through the oil-free graphite bushing and contacts the latch 14 through the self-lubricating bushing, thereby reducing the friction between the latch 14 and the latch support 15 and the socket 16 when opening and closing, and at the same time, the lubrication and maintenance work of this part is omitted.
[0028] The utility model installs a wedge-shaped slider 17 on the door frame corresponding to the inner hole of the socket 16, installs a pressure spring 19 at the end of the wedge-shaped slider 17, and installs a travel switch 18 on the door frame above the wedge-shaped slider 17; a spring limit plate is installed on the outer side of the pressure spring 19, and when the latch 14 is unlocked and moves toward the socket 16 and the latch support 15, the pressure spring 19 returns the wedge-shaped slider 17 after being supported by the spring limit plate.
[0029] When opening and closing the heavy-duty explosion-proof door, turn the hand wheel, the transmission shaft 6 drives the first bevel gear 8 to rotate, so that the second bevel gear 9 rotates and drives the lead screw 10 to perform linear telescopic motion. The lead screw 10 pushes the two chain plates 12 through the double-ear slider to move around its pin shaft 13 respectively, driving the two latches 14 to perform synchronous opening and closing actions, and the labor-saving opening and closing of the latch is realized through the lever principle. After opening and closing, the heavy-duty explosion-proof door drives the rotating arm 2 and the rotating shaft 3 to rotate synchronously, and the rotating shaft 3 drives the inner and outer rings of the bearing to rotate relative to each other in the upper hinge support 101 and the lower hinge support 102, converting the traditional sliding friction into the rolling friction of the bearing. The latch 14 passes through the inner hole of the socket 16 and pushes the wedge-shaped slider 17 to move, and then the wedge-shaped surface is gradually raised to trigger the action of the travel switch 18, which can accurately feedback the opening and closing state of the latch to lock the latch in place.
[0030] The utility model is easy to operate, saves time and labor, and greatly improves work efficiency.
Claims
1. A heavy-duty explosion-proof door opening and closing device, characterized in that: It comprises a hinge assembly (1) installed between one side of a heavy explosion-proof door and a corresponding door frame on one side, and a latch mechanism installed on the other side of the explosion-proof door; the hinge assembly is divided into two groups arranged at intervals; The latch mechanism comprises a driving assembly mounted on the heavy explosion-proof door, a chain plate (12) symmetrically arranged and connected to the driving assembly at one end, and a plug-in assembly mounted at the other end of each chain plate (12), the two groups of plug-in assemblies being symmetrically arranged, and the chain plate (12) being hinged to the explosion-proof door surface.
2. A heavy-duty explosion-proof door opening and closing device according to claim 1, characterized in that: The hinge assembly comprises a rotating arm (2) with one end fixedly mounted on one side of the heavy explosion-proof door, an upper hinge support (101) located above the movable end of the rotating arm (2) and mounted on the door frame, a lower hinge support (102) located below the movable end of the rotating arm (2) and mounted on the door frame, and a rotating shaft (3) fixedly mounted in a hole of the rotating arm (2); A radial bearing (103) is installed in the upper hinge support (101) and the lower hinge support (102) respectively, and a thrust bearing (104) is installed on the lower shoulder of the radial bearing (103) in the lower hinge support (102); the upper and lower end journals of the rotating shaft (3) are correspondingly installed in the radial bearing (103) respectively.
3. A heavy-duty explosion-proof door opening and closing device according to claim 1, characterized in that: The driving assembly comprises a gear box (7) fixedly mounted on the inner side of the heavy-duty explosion-proof door, a first bevel gear (8) and a second bevel gear (9) mounted in the gear box (7) and meshing at right angles, a transmission shaft (6) connected to the first bevel gear (8) via a coupling, an operating member (5) mounted on the outer end of the transmission shaft (6), a lead screw (10) threadedly connected to the inner hole of the second bevel gear (9), and a double-ear slider (11) fixedly mounted on the outer end of the lead screw (10), and two chain plates (12) symmetrically hinged to the upper and lower ends of the double-ear slider (11); The transmission shaft (6) passes through the outer wall of the gear box (7) and the heavy-duty explosion-proof door body, and the operating member (5) is arranged on the outside of the heavy-duty explosion-proof door.
4. A heavy-duty explosion-proof door opening and closing device according to claim 3, characterized in that: The plug-in assembly comprises a latch support (15) fixedly mounted on one side of the heavy explosion-proof door and corresponding to the end of the chain plate (12), a socket (16) mounted on the door frame, and a latch (14) hinged transversely to the end of the chain plate (12), both ends of the chain plate (12) are oblong holes, the socket (16) is located outside the latch support (15) and corresponds to the latch support (15), and the inner holes of the latch support (15) and the socket (16) are coaxial; The latch pin (14) passes through the inner holes of the latch pin support (15) and the socket (16) through clearance.
5. A heavy-duty explosion-proof door opening and closing device according to claim 4, characterized in that: A wedge-shaped slider (17) is mounted on the door frame corresponding to the inner hole of the socket (16), a pressure spring (19) is mounted on the end of the wedge-shaped slider (17), and a travel switch (18) is mounted on the door frame above the wedge-shaped slider (17).
6. The heavy-duty explosion-proof door opening and closing device according to claim 2, characterized in that: An upper pressure cover (41) is installed on the top of the upper hinge support (101), and a lower pressure cover (42) is installed on the shaft hole end of the lower hinge support (102), and the top sleeve of the lower pressure cover (42) is connected to the lower track ring of the thrust bearing (104).
7. The heavy-duty explosion-proof door opening and closing device according to claim 3, characterized in that: The operating member (5) is a hand wheel.
8. The heavy-duty explosion-proof door opening and closing device according to claim 4, characterized in that: Oil-free graphite bushings are installed in the inner holes of the latch support (15) and the socket (16), and the latch (14) passes through the oil-free graphite bushings.