Automatic locking mechanism for a steel door

Abstract

The utility model provides an automatic locking mechanism of steel door, including pusher, first support, first connecting rod, second connecting rod, pivot, carousel, transmission mechanism and door lock, pusher and first connecting rod's one end articulate, pusher can extend and contract, first connecting rod's middle part and first support articulate, second connecting rod's one end and first connecting rod's other end articulate, and other end and pivot are fixedly connected, carousel is installed in the back of steel door, and with pivot coaxial connection, transmission mechanism is connected with carousel and door lock respectively, door lock closes when pivot rotates to first limit position, and door lock opens when pivot rotates to second limit position. Through pusher drive first connecting rod's one end to do linear motion, make first connecting rod rotate around first support, drive second connecting rod and pivot rotate, realize the rotation of carousel, and the automatic opening and closing of door lock are realized through the transmission of transmission mechanism, convenient operation, need not manual switch door lock, save time and labour.

Description

Technical Field

[0001] This utility model relates to the field of ship equipment technology, and in particular to an automatic locking mechanism for a steel door. Background Technology

[0002] On ships, commonly used steel doors such as watertight doors and air-raid shelter doors are locked by rotating handles or handwheels. Due to the airtightness requirements, these doors are equipped with multiple bolts or locking devices, making them inconvenient to close and open, and laborious to operate. Utility Model Content

[0003] In view of this, the present invention proposes an automatic locking mechanism for steel doors to solve the technical problem mentioned in the background art that steel doors in the prior art have multiple bolts or locking devices, making them inconvenient to close and open, and requiring laborious operation.

[0004] The technical solution of this utility model is implemented as follows: This utility model provides an automatic locking mechanism for a steel door, including a pusher, a first support, a first connecting rod, a second connecting rod, a rotating shaft, a turntable, a transmission mechanism, and a door lock, wherein: The pusher is hinged to one end of the first connecting rod, and the pusher can extend and retract. The first support is installed on the front of the steel door; The middle part of the first connecting rod is hinged to the first support; One end of the second connecting rod is hinged to the other end of the first connecting rod, and the other end of the second connecting rod is fixed to the rotating shaft; The turntable is installed on the back of the steel door and is coaxially connected to the pivot. The transmission mechanism is connected to the turntable and the door lock respectively; The door lock is located on the back side of the steel door. The door lock is closed when the pivot rotates to the first limit position and is opened when the pivot rotates to the second limit position.

[0005] Based on the above technical solutions, preferably, the transmission mechanism includes a third link, a second support, and a linkage clamp; one end of the third link is hinged to the turntable, and the other end is connected to the linkage clamp; the middle part of the third link is hinged to the second support; the second support is fixedly installed on the steel door; the linkage clamp is connected to the door lock.

[0006] Based on the above technical solution, preferably, it also includes a first limiting member and a second limiting member installed on the steel door. The first limiting member abuts against the second connecting rod to limit the rotation shaft to the first limiting position; the second limiting member abuts against the second connecting rod to limit the rotation shaft to the second limiting position.

[0007] Based on the above technical solution, preferably, the included angle between the first limiting member and the second limiting member is 90 degrees, and the second connecting rod moves in the area of ​​the minor arc between the first limiting member and the second limiting member.

[0008] Based on the above technical solutions, preferably, the pushing component is an electric push rod, which pushes one end of the first connecting rod to move linearly along the height direction of the steel door.

[0009] Based on the above technical solutions, preferably, it also includes a base, which is fixedly installed on the steel door, and the electric push rod is installed on the base.

[0010] Based on the above technical solutions, preferably, the first link includes a pushing section and a swinging section, the end of the pushing section away from the swinging section is connected to the pushing member, the swinging section has an angle with the pushing section, and the swinging section is hinged to the second link.

[0011] Based on the above technical solutions, preferably, it also includes a control box, which is electrically connected to the pusher to control the pusher to achieve a specified stroke of forward and backward movement.

[0012] The automatic locking mechanism for steel doors of this invention has the following advantages over existing technologies: (1) By extending and retracting the pusher, one end of the first connecting rod is driven to make a linear motion, thereby driving the first connecting rod to rotate around the first support, driving the second connecting rod and the rotating shaft to rotate, realizing the rotation of the turntable. The turntable drives the door lock to move through the transmission mechanism, so that the door lock closes when the rotating shaft rotates to the first limit position and opens when the rotating shaft rotates to the second limit position, realizing the automatic opening and closing of the door lock. It is convenient to operate and does not require manual opening and closing of the door lock, saving time and effort. (2) By rotating the turntable, the third link rotates around the second support, thereby realizing the movement of the linkage buckle to complete the opening and closing of the door lock. The structure is simple and the opening and closing operation of the door lock is quick and convenient. (3) The first limiting member abuts against the second connecting rod to limit the rotation, so that the rotating shaft is in the first limiting position; the second limiting member abuts against the second connecting rod to limit the rotation, so that the rotating shaft is in the second limiting position, thereby limiting the rotation angle of the rotating shaft, so that the door lock can be closed in the first limiting position and opened in the second limiting position; (4) The first connecting rod includes a pushing section and a swinging section. The end of the pushing section away from the swinging section is connected to the pushing member. The swinging section is hinged to the second connecting rod. The swinging section and the pushing section have an angle. Therefore, during the process of rotating the shaft from the first limit position to the second limit position, the failure of the mechanism can be avoided. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the front of the steel door in the locked state, showing the automatic locking mechanism of the steel door in this embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the back of the steel door in the locked state, representing the automatic locking mechanism of the steel door in this embodiment of the present invention. Figure 3 This is a schematic diagram of the front of the steel door in the unlocked state, showing the automatic locking mechanism of the steel door in this embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of the back of the steel door in the unlocked state, representing the automatic locking mechanism of the steel door in this embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of the first connecting rod in an embodiment of the present utility model; Figure 6 This is a schematic diagram of the third link in an embodiment of the present invention.

[0015] Explanation of reference numerals in the attached drawings: 1-Pushing component, 2-First support, 3-First connecting rod, 4-Second connecting rod, 5-Rotating shaft, 6-Turntable, 7-Transmission mechanism, 8-Door lock, 9-First limiting component, 10-Second limiting component, 20-Base, 30-Control box; 100 - Steel door, 200 - Door frame; 31-Pushing section, 311-First oblong hole, 32-Swinging section, 321-Second oblong hole; 71-Third link, 711-Third oblong hole, 712-Fourth oblong hole, 72-Second support, 73-Linkage clamp. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0017] Reference Figures 1-6 As shown in the embodiment of this utility model, an automatic locking mechanism for a steel door is proposed, including a pusher 1, a first support 2, a first connecting rod 3, a second connecting rod 4, and a rotating shaft 5 located on the front of the steel door 100, and a turntable 6, a transmission mechanism 7, and a door lock 8 located on the back of the steel door 100, wherein: The pusher 1 is hinged to one end of the first connecting rod 3. The pusher 1 can extend and retract. One end of the first connecting rod 3 is provided with a first waist-shaped hole 311. The first waist-shaped hole 311 is hinged to the pusher 1, so that the connection position between the pusher 1 and the first connecting rod 3 can have a certain amount of movement when the pusher 1 extends and retracts, ensuring that the first connecting rod 3 will not jam or fail when rotating, thus improving reliability. The first support 2 is fixedly installed on the front of the steel door 100; The middle part of the first connecting rod 3 is hinged to the first support 2; One end of the second connecting rod 4 is hinged to the other end of the first connecting rod 3, and the other end of the second connecting rod 4 is fixed to the rotating shaft 5; the other end of the first connecting rod 3 is provided with a second oblong hole 321, and the second connecting rod 4 is hinged to the second oblong hole 321 by a pin, ensuring that the second connecting rod 4 will not jam or fail when rotating, thus improving reliability; when operation is required, the pin connecting the second connecting rod 4 and the first connecting rod 3 can be removed, so that the rotating shaft 5 can be manually rotated to realize the manual opening and closing of the door lock 8. When the pusher 1 cannot be used, the steel door 100 can also be opened and closed, thus improving the reliability of the device; The rotating shaft 5 is rotatably mounted on the steel door 100 and passes through the steel door 100 to connect with the turntable 6 on the back. The turntable 6 is installed on the back of the steel door 100 and is coaxially connected to the rotating shaft 5; the transmission mechanism 7 is connected to the turntable 6 and the door lock 8 respectively. The door lock 8 is located on the back side of the steel door 100. The door lock 8 closes when the rotating shaft 5 rotates to the first limit position and opens when the rotating shaft 5 rotates to the second limit position. The steel door 100 is hinged to the door frame 200. The door lock 8 is hinged to the steel door 100 in the middle. One end of the door lock 8 is connected to the transmission mechanism 7, and the other end is used to limit the door lock 8 to the door frame 200, thereby locking the steel door 100. When it needs to be opened, the transmission mechanism 7 drives the door lock 8 to rotate around the hinge point, so that the other end of the door lock 8 is released from the limit of the door frame 200, thereby unlocking the steel door 100.

[0018] The automatic locking mechanism for the steel door proposed in this embodiment uses the extension and retraction of the pusher 1 to drive one end of the first connecting rod 3 to move linearly, thereby causing the first connecting rod 3 to rotate around the first support 2, which in turn drives the second connecting rod 4 and the rotating shaft 5 to rotate, thus realizing the rotation of the turntable 6. The turntable 6 drives the door lock 8 to move through the transmission mechanism 7, so that the door lock 8 closes when the rotating shaft 5 rotates to the first limit position and opens when the rotating shaft 5 rotates to the second limit position, realizing the automatic opening and closing of the door lock 8. It is convenient to operate and does not require manual opening and closing of the door lock 8, saving time and effort.

[0019] In some embodiments, the transmission mechanism 7 includes a third link 71, a second support 72, and a linkage clip 73; one end of the third link 71 is hinged to the turntable 6, and the other end is connected to the linkage clip 73; the middle part of the third link 71 is hinged to the second support 72; the second support 72 is fixedly installed on the steel door 100; the linkage clip 73 is connected to the door lock 8. One end of the third link 71 is provided with a third oblong hole 711, and the other end is provided with a fourth oblong hole 712. The third oblong hole 711 is hinged to the turntable 6, and the fourth oblong hole 712 is hinged to the linkage clip 73. Three door locks 8 are evenly provided on each linkage clip 73; by rotating the turntable 6, the third link 71 is driven to rotate around the second support 72, thereby realizing the movement of the linkage clip 73, so as to complete the simultaneous opening and closing of multiple door locks 8. The structure is simple, and the opening and closing operation of the door locks 8 is quick and convenient. In this embodiment, there are two transmission mechanisms 7, which are located on both sides of the turntable 6. The door locks 8 connected by the two linkage buckles 73 are located on both sides of the width direction of the steel door 100, so that both sides of the steel door 100 can be locked and unlocked at the same time.

[0020] In some embodiments, the automatic locking mechanism further includes a first limiting member 9 and a second limiting member 10 installed on the steel door 100. The first limiting member 9 abuts against the second connecting rod 4 to limit the rotation shaft 5 to the first limiting position; the second limiting member 10 abuts against the second connecting rod 4 to limit the rotation shaft 5 to the second limiting position. The first limiting member 9 and the second limiting member 10 can be flat plates. The first limiting member 9 abuts against the first side of the second connecting rod 4 to limit the rotation shaft 5 to the first limiting position, and the second limiting member 10 abuts against the second side of the second connecting rod 4 to limit the rotation shaft 5 to the second limiting position. The second side and the first side are arranged back-to-back. By using the first limiting member 9 and the second limiting member 10 to limit the rotation angle of the second connecting rod 4 and the rotation shaft 5, the door lock 8 can be closed at the first limiting position and opened at the second limiting position, improving the reliability of the device.

[0021] In some embodiments, the included angle between the first limiting member 9 and the second limiting member 10 is 90 degrees, and the second connecting rod 4 moves within the lesser arc region between the first limiting member 9 and the second limiting member 10. By setting the included angle, the rotation angle of the rotating shaft 5 can be limited to 90 degrees, at which the door lock 8 can be opened and closed. Of course, the included angle is not limited to 90 degrees; it can be other values, as long as it satisfies the angles corresponding to the opening and closing of the door lock 8.

[0022] In some embodiments, the pusher 1 is an electric push rod, which pushes one end of the first connecting rod 3 to move linearly along the height direction of the steel door 100. By pushing one end of the first connecting rod 3 linearly along the height direction of the steel door 100, the electric push rod causes the first connecting rod 3 to rotate around the first support 2, which in turn causes the second connecting rod 4 and the rotating shaft 5 to rotate, thus rotating the turntable 6. This transmits the operation of the front of the steel door 100 to the door lock 8 on the back, enabling the automatic opening and closing of the door lock 8.

[0023] In some embodiments, the automatic locking mechanism further includes a base 20, which is fixedly mounted on the steel door 100, and the electric push rod is mounted on the base 20. Fixing the electric push rod to the base 20 facilitates its installation and removal; the electric push rod can be removed simply by opening the steel door 100, making installation and maintenance more convenient.

[0024] In some embodiments, the first link 3 includes a pushing section 31 and a swinging section 32. The end of the pushing section 31 away from the swinging section 32 is connected to the pushing member 1. The swinging section 32 forms an angle with the pushing section 31 and is hinged to the second link 4. The pushing member 1 pushes the pushing section 31 to rotate around the first support 2, causing the swinging section 32 to rotate as well. Because the swinging section 32 forms an angle with the pushing section 31, mechanism failure can be avoided during the rotation of the rotating shaft 5 from the first limit position to the second limit position. The length of the pushing section 31 is less than the length of the swinging section 32, so that a small displacement of the pushing member 1 can complete the rotation of the first link 3 at the corresponding angle, realizing the rapid opening and closing of the door lock 8.

[0025] In some embodiments, the automatic locking mechanism further includes a control box 30, which is electrically connected to the pusher 1 to control the pusher 1 to perform forward and backward movements with a specified stroke. Corresponding pressure sensors may also be provided on the first and second limiters for detecting the arrival of the second link 4. The control box 30 is also electrically connected to these pressure sensors. When the control box 30 senses that the second link 4 is in contact with the first or second limiter, it controls the pusher 1 to stop moving.

[0026] The working principle of the automatic locking mechanism of the steel door in this embodiment of the utility model is as follows: the extension and retraction of the pushing member 1 drives one end of the first connecting rod 3 to move linearly, thereby driving the first connecting rod 3 to rotate around the first support 2, driving the second connecting rod 4 and the rotating shaft 5 to rotate, realizing the rotation of the turntable 6; the turntable 6 drives the third connecting rod 71 to rotate around the second support 72, thereby realizing the movement of the linkage latch 73, so as to complete the simultaneous opening and closing of multiple door locks 8. When the first limiting member 9 abuts against the second connecting rod 4, the rotating shaft 5 is in the first limiting position, and the door lock 8 is in the closed state; when the second limiting member 10 abuts against the second connecting rod 4, the rotating shaft 5 is in the second limiting position, and the door lock 8 is in the open state.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic locking mechanism for a steel door, characterized in that, It includes a pusher, a first support, a first link, a second link, a rotating shaft, a turntable, a transmission mechanism, and a door lock, wherein: The pusher is hinged to one end of the first connecting rod, and the pusher can extend and retract. The first support is installed on the front of the steel door; The middle part of the first connecting rod is hinged to the first support; One end of the second connecting rod is hinged to the other end of the first connecting rod, and the other end of the second connecting rod is fixed to the rotating shaft; The turntable is installed on the back of the steel door and is coaxially connected to the pivot. The transmission mechanism is connected to the turntable and the door lock respectively; The door lock is located on the back side of the steel door. The door lock is closed when the pivot rotates to the first limit position and is opened when the pivot rotates to the second limit position.

2. The automatic locking mechanism for a steel door as described in claim 1, characterized in that, The transmission mechanism includes a third link, a second support, and a linkage clamp; one end of the third link is hinged to the turntable, and the other end is connected to the linkage clamp; the middle part of the third link is hinged to the second support; the second support is fixedly installed on the steel door; the linkage clamp is connected to the door lock.

3. The automatic locking mechanism for a steel door as described in claim 1, characterized in that, It also includes a first limiting member and a second limiting member installed on the steel door. The first limiting member abuts against the second connecting rod to limit the pivot, so that the pivot is in the first limiting position; the second limiting member abuts against the second connecting rod to limit the pivot, so that the pivot is in the second limiting position.

4. The automatic locking mechanism for a steel door as described in claim 3, characterized in that, The included angle between the first limiting member and the second limiting member is 90 degrees, and the second connecting rod moves in the area of ​​the minor arc between the first limiting member and the second limiting member.

5. The automatic locking mechanism for a steel door as described in claim 1, characterized in that, The pushing component is an electric push rod, which pushes one end of the first connecting rod to move linearly along the height direction of the steel door.

6. The automatic locking mechanism for a steel door as described in claim 5, characterized in that, It also includes a base, which is fixedly installed on the steel door, and the electric push rod is installed on the base.

7. The automatic locking mechanism for a steel door as described in claim 1, characterized in that, The first link includes a pushing section and a swinging section. The end of the pushing section away from the swinging section is connected to the pushing member. The swinging section has an angle with the pushing section and is hinged to the second link.

8. The automatic locking mechanism for a steel door as described in any one of claims 1-7, characterized in that, It also includes a control box, which is electrically connected to the pusher to control the pusher to perform forward and backward movements with a specified stroke.

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